From 1a5f612d2b50811e4d4e26b04883caf10985191f Mon Sep 17 00:00:00 2001 From: kcr Date: Mon, 19 Feb 2001 23:22:49 +0000 Subject: [PATCH] Initial revision git-svn-id: svn://svn.1ts.org/debian/trunk@2 cbed1d16-5ef5-0310-b6a1-d4a37b08ba1f --- libares/Makefile.in | 87 +++ libares/NEWS | 12 + libares/README | 41 + libares/adig.c | 589 +++++++++++++++ libares/ahost.c | 110 +++ libares/ares.h | 124 +++ libares/ares__close_sockets.c | 54 ++ libares/ares__get_hostent.c | 164 ++++ libares/ares__read_line.c | 64 ++ libares/ares_destroy.3 | 43 ++ libares/ares_destroy.c | 45 ++ libares/ares_dns.h | 81 ++ libares/ares_expand_name.3 | 65 ++ libares/ares_expand_name.c | 153 ++++ libares/ares_fds.3 | 62 ++ libares/ares_fds.c | 52 ++ libares/ares_free_errmem.3 | 42 ++ libares/ares_free_errmem.c | 26 + libares/ares_free_hostent.3 | 49 ++ libares/ares_free_hostent.c | 33 + libares/ares_free_string.3 | 37 + libares/ares_free_string.c | 24 + libares/ares_gethostbyaddr.3 | 100 +++ libares/ares_gethostbyaddr.c | 155 ++++ libares/ares_gethostbyname.3 | 103 +++ libares/ares_gethostbyname.c | 278 +++++++ libares/ares_init.3 | 170 +++++ libares/ares_init.c | 581 ++++++++++++++ libares/ares_init_options.3 | 2 + libares/ares_mkquery.3 | 76 ++ libares/ares_mkquery.c | 155 ++++ libares/ares_parse_a_reply.3 | 65 ++ libares/ares_parse_a_reply.c | 167 +++++ libares/ares_parse_ptr_reply.3 | 77 ++ libares/ares_parse_ptr_reply.c | 153 ++++ libares/ares_private.h | 123 +++ libares/ares_process.3 | 79 ++ libares/ares_process.c | 599 +++++++++++++++ libares/ares_query.3 | 142 ++++ libares/ares_query.c | 105 +++ libares/ares_search.3 | 144 ++++ libares/ares_search.c | 268 +++++++ libares/ares_send.3 | 117 +++ libares/ares_send.c | 98 +++ libares/ares_strerror.3 | 44 ++ libares/ares_strerror.c | 47 ++ libares/ares_timeout.3 | 64 ++ libares/ares_timeout.c | 61 ++ libares/config.guess | 951 +++++++++++++++++++++++ libares/config.sub | 955 +++++++++++++++++++++++ libares/configure | 1288 ++++++++++++++++++++++++++++++++ libares/configure.in | 18 + libares/install-sh | 251 +++++++ libares/mkinstalldirs | 40 + 54 files changed, 9433 insertions(+) create mode 100644 libares/Makefile.in create mode 100644 libares/NEWS create mode 100644 libares/README create mode 100644 libares/adig.c create mode 100644 libares/ahost.c create mode 100644 libares/ares.h create mode 100644 libares/ares__close_sockets.c create mode 100644 libares/ares__get_hostent.c create mode 100644 libares/ares__read_line.c create mode 100644 libares/ares_destroy.3 create mode 100644 libares/ares_destroy.c create mode 100644 libares/ares_dns.h create mode 100644 libares/ares_expand_name.3 create mode 100644 libares/ares_expand_name.c create mode 100644 libares/ares_fds.3 create mode 100644 libares/ares_fds.c create mode 100644 libares/ares_free_errmem.3 create mode 100644 libares/ares_free_errmem.c create mode 100644 libares/ares_free_hostent.3 create mode 100644 libares/ares_free_hostent.c create mode 100644 libares/ares_free_string.3 create mode 100644 libares/ares_free_string.c create mode 100644 libares/ares_gethostbyaddr.3 create mode 100644 libares/ares_gethostbyaddr.c create mode 100644 libares/ares_gethostbyname.3 create mode 100644 libares/ares_gethostbyname.c create mode 100644 libares/ares_init.3 create mode 100644 libares/ares_init.c create mode 100644 libares/ares_init_options.3 create mode 100644 libares/ares_mkquery.3 create mode 100644 libares/ares_mkquery.c create mode 100644 libares/ares_parse_a_reply.3 create mode 100644 libares/ares_parse_a_reply.c create mode 100644 libares/ares_parse_ptr_reply.3 create mode 100644 libares/ares_parse_ptr_reply.c create mode 100644 libares/ares_private.h create mode 100644 libares/ares_process.3 create mode 100644 libares/ares_process.c create mode 100644 libares/ares_query.3 create mode 100644 libares/ares_query.c create mode 100644 libares/ares_search.3 create mode 100644 libares/ares_search.c create mode 100644 libares/ares_send.3 create mode 100644 libares/ares_send.c create mode 100644 libares/ares_strerror.3 create mode 100644 libares/ares_strerror.c create mode 100644 libares/ares_timeout.3 create mode 100644 libares/ares_timeout.c create mode 100755 libares/config.guess create mode 100755 libares/config.sub create mode 100755 libares/configure create mode 100644 libares/configure.in create mode 100755 libares/install-sh create mode 100755 libares/mkinstalldirs diff --git a/libares/Makefile.in b/libares/Makefile.in new file mode 100644 index 0000000..9f3f40a --- /dev/null +++ b/libares/Makefile.in @@ -0,0 +1,87 @@ +# $Id: Makefile.in,v 1.3 2000/01/05 16:29:43 ghudson Exp $ + +SHELL=/bin/sh +INSTALL=@INSTALL@ +RANLIB=@RANLIB@ +VPATH=@srcdir@ +srcdir=@srcdir@ +top_srcdir=@top_srcdir@ +prefix=@prefix@ +exec_prefix=@exec_prefix@ +libdir=@libdir@ +includedir=@includedir@ +mandir=@mandir@ + +CC=@CC@ +CPPFLAGS=@CPPFLAGS@ +CFLAGS=@CFLAGS@ ${WARN_CFLAGS} ${ERROR_CFLAGS} +DEFS=@DEFS@ +LDFLAGS=@LDFLAGS@ +LIBS=@LIBS@ +ALL_CFLAGS=${CPPFLAGS} ${CFLAGS} ${DEFS} +OBJS= ares__close_sockets.o ares__get_hostent.o ares__read_line.o \ + ares_destroy.o ares_expand_name.o ares_fds.o ares_free_errmem.o \ + ares_free_hostent.o ares_free_string.o ares_gethostbyaddr.o \ + ares_gethostbyname.o ares_init.o ares_mkquery.o ares_parse_a_reply.o \ + ares_parse_ptr_reply.o ares_process.o ares_query.o ares_search.o \ + ares_send.o ares_strerror.o ares_timeout.o + +all: libares.a adig ahost + +libares.a: ${OBJS} + ar cru $@ ${OBJS} + ${RANLIB} $@ + +adig: adig.o libares.a + ${CC} ${LDFLAGS} -o $@ adig.o libares.a ${LIBS} + +ahost: ahost.o libares.a + ${CC} ${LDFLAGS} -o $@ ahost.o libares.a ${LIBS} + +${OBJS}: ares.h ares_dns.h ares_private.h + +.c.o: + ${CC} -c ${ALL_CFLAGS} $< + +check: + +install: + ${top_srcdir}/mkinstalldirs ${DESTDIR}${libdir} + ${top_srcdir}/mkinstalldirs ${DESTDIR}${includedir} + ${top_srcdir}/mkinstalldirs ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 644 libares.a ${DESTDIR}${libdir} + ${RANLIB} ${DESTDIR}${libdir}/libares.a + chmod u-w ${DESTDIR}${libdir}/libares.a + ${INSTALL} -m 444 ${srcdir}/ares.h ${DESTDIR}${includedir} + ${INSTALL} -m 444 ${srcdir}/ares_destroy.3 ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_expand_name.3 ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_fds.3 ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_free_errmem.3 ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_free_hostent.3 \ + ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_free_string.3 \ + ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_gethostbyaddr.3 \ + ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_gethostbyname.3 \ + ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_init.3 ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_init_options.3 \ + ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_mkquery.3 ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_parse_a_reply.3 \ + ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_parse_ptr_reply.3 \ + ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_process.3 ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_query.3 ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_search.3 ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_send.3 ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_strerror.3 ${DESTDIR}${mandir}/man3 + ${INSTALL} -m 444 ${srcdir}/ares_timeout.3 ${DESTDIR}${mandir}/man3 + +clean: + rm -f ${OBJS} libares.a adig.o adig ahost.o ahost + +distclean: clean + rm -f config.cache config.log config.status Makefile diff --git a/libares/NEWS b/libares/NEWS new file mode 100644 index 0000000..1c7058e --- /dev/null +++ b/libares/NEWS @@ -0,0 +1,12 @@ +Major changes in release 1.1.0: +* Added ares_free_string() function so that memory can be freed in the + same layer as it is allocated, a desirable feature in some + environments. +* A few of the ares_dns.h macros are fixed to use the proper bitwise + operator. +* Fixed a couple of fenceposts fixed in ares_expand_name()'s + bounds-checking. +* In process_timeouts(), extract query->next before calling + next_server() and possibly freeing the query structure. +* Casted arguments to ctype macros casted to unsigned char, since not + all char values are valid inputs to those macros according to ANSI. diff --git a/libares/README b/libares/README new file mode 100644 index 0000000..06b5e81 --- /dev/null +++ b/libares/README @@ -0,0 +1,41 @@ +This is ares, an asynchronous resolver library. It is intended for +applications which need to perform DNS queries without blocking, or +need to perform multiple DNS queries in parallel. The primary +examples of such applications are servers which communicate with +multiple clients and programs with graphical user interfaces. + +This library implementation is not especially portable to crufty old +systems like SunOS 4. It assumes a compiler which can handle ANSI C +syntax, a system malloc which properly handles realloc(NULL, foo) and +free(NULL), and a reasonably up-to-date . + +I have attempted to preserve the externally visible behavior of the +BIND resolver in nearly all respects. The API of the library is, of +course, very different from the synchronous BIND API; instead of +invoking a function like res_send() and getting a return value back +indicating the number of bytes in the response, you invoke a function +like ares_send() and give it a callback function to invoke when the +response arrives. You then have to select() on the file descriptors +indicated by ares_fds(), with a timeout given by ares_timeout(). You +call ares_process() when select() returns. + +Some features are missing from the current version of ares, relative +to the BIND resolver: + + * There is no IPV6 support. + * There is no hostname verification. + * There is no logging of unexpected events. + * There is no debugging-oriented logging. + * There is no YP support. + +libares requires an ANSI compiler to compile and use. To build the +library, just run "./configure" and "make". To install it, run "make +install". Run "./configure --help" to see a list of options you can +provide to configure to change how the library builds. libares has no +data files, so you can move the include file and library around freely +without leaving behind any dependencies on old paths. Building the +library will also build the "adig" program, a little toy for trying +out the library. It doesn't get installed. + +libares is distributed at athena-dist.mit.edu:pub/ATHENA/ares. Please +send bug reports and comments to ghudson@mit.edu. diff --git a/libares/adig.c b/libares/adig.c new file mode 100644 index 0000000..37b7eeb --- /dev/null +++ b/libares/adig.c @@ -0,0 +1,589 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: adig.c,v 1.6 1999/10/23 19:28:12 danw Exp $"; + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "ares.h" +#include "ares_dns.h" + +#ifndef INADDR_NONE +#define INADDR_NONE 0xffffffff +#endif + +extern int optind; +extern char *optarg; + +struct nv { + const char *name; + int value; +}; + +static const struct nv flags[] = { + { "usevc", ARES_FLAG_USEVC }, + { "primary", ARES_FLAG_PRIMARY }, + { "igntc", ARES_FLAG_IGNTC }, + { "norecurse", ARES_FLAG_NORECURSE }, + { "stayopen", ARES_FLAG_STAYOPEN }, + { "noaliases", ARES_FLAG_NOALIASES } +}; +static const int nflags = sizeof(flags) / sizeof(flags[0]); + +static const struct nv classes[] = { + { "IN", C_IN }, + { "CHAOS", C_CHAOS }, + { "HS", C_HS }, + { "ANY", C_ANY } +}; +static const int nclasses = sizeof(classes) / sizeof(classes[0]); + +static const struct nv types[] = { + { "A", T_A }, + { "NS", T_NS }, + { "MD", T_MD }, + { "MF", T_MF }, + { "CNAME", T_CNAME }, + { "SOA", T_SOA }, + { "MB", T_MB }, + { "MG", T_MG }, + { "MR", T_MR }, + { "NULL", T_NULL }, + { "WKS", T_WKS }, + { "PTR", T_PTR }, + { "HINFO", T_HINFO }, + { "MINFO", T_MINFO }, + { "MX", T_MX }, + { "TXT", T_TXT }, + { "RP", T_RP }, + { "AFSDB", T_AFSDB }, + { "X25", T_X25 }, + { "ISDN", T_ISDN }, + { "RT", T_RT }, + { "NSAP", T_NSAP }, + { "NSAP_PTR", T_NSAP_PTR }, + { "SIG", T_SIG }, + { "KEY", T_KEY }, + { "PX", T_PX }, + { "GPOS", T_GPOS }, + { "AAAA", T_AAAA }, + { "LOC", T_LOC }, + { "UINFO", T_UINFO }, + { "UID", T_UID }, + { "GID", T_GID }, + { "UNSPEC", T_UNSPEC }, + { "AXFR", T_AXFR }, + { "MAILB", T_MAILB }, + { "MAILA", T_MAILA }, + { "ANY", T_ANY } +}; +static const int ntypes = sizeof(types) / sizeof(types[0]); + +static const char *opcodes[] = { + "QUERY", "IQUERY", "STATUS", "(reserved)", "NOTIFY", + "(unknown)", "(unknown)", "(unknown)", "(unknown)", + "UPDATEA", "UPDATED", "UPDATEDA", "UPDATEM", "UPDATEMA", + "ZONEINIT", "ZONEREF" +}; + +static const char *rcodes[] = { + "NOERROR", "FORMERR", "SERVFAIL", "NXDOMAIN", "NOTIMP", "REFUSED", + "(unknown)", "(unknown)", "(unknown)", "(unknown)", "(unknown)", + "(unknown)", "(unknown)", "(unknown)", "(unknown)", "NOCHANGE" +}; + +static void callback(void *arg, int status, unsigned char *abuf, int alen); +static const unsigned char *display_question(const unsigned char *aptr, + const unsigned char *abuf, + int alen); +static const unsigned char *display_rr(const unsigned char *aptr, + const unsigned char *abuf, int alen); +static const char *type_name(int type); +static const char *class_name(int class); +static void usage(void); + +int main(int argc, char **argv) +{ + ares_channel channel; + int c, i, optmask = ARES_OPT_FLAGS, class = C_IN, type = T_A; + int status, nfds, count; + struct ares_options options; + struct hostent *hostent; + fd_set read_fds, write_fds; + struct timeval *tvp, tv; + char *errmem; + + options.flags = ARES_FLAG_NOCHECKRESP; + options.servers = NULL; + options.nservers = 0; + while ((c = getopt(argc, argv, "f:s:c:t:T:U:")) != -1) + { + switch (c) + { + case 'f': + /* Add a flag. */ + for (i = 0; i < nflags; i++) + { + if (strcmp(flags[i].name, optarg) == 0) + break; + } + if (i == nflags) + usage(); + options.flags |= flags[i].value; + break; + + case 's': + /* Add a server, and specify servers in the option mask. */ + hostent = gethostbyname(optarg); + if (!hostent || hostent->h_addrtype != AF_INET) + { + fprintf(stderr, "adig: server %s not found.\n", optarg); + return 1; + } + options.servers = realloc(options.servers, (options.nservers + 1) + * sizeof(struct in_addr)); + if (!options.servers) + { + fprintf(stderr, "Out of memory!\n"); + return 1; + } + memcpy(&options.servers[options.nservers], hostent->h_addr, + sizeof(struct in_addr)); + options.nservers++; + optmask |= ARES_OPT_SERVERS; + break; + + case 'c': + /* Set the query class. */ + for (i = 0; i < nclasses; i++) + { + if (strcasecmp(classes[i].name, optarg) == 0) + break; + } + if (i == nclasses) + usage(); + class = classes[i].value; + break; + + case 't': + /* Set the query type. */ + for (i = 0; i < ntypes; i++) + { + if (strcasecmp(types[i].name, optarg) == 0) + break; + } + if (i == ntypes) + usage(); + type = types[i].value; + break; + + case 'T': + /* Set the TCP port number. */ + if (!isdigit((unsigned char)*optarg)) + usage(); + options.tcp_port = strtol(optarg, NULL, 0); + optmask |= ARES_OPT_TCP_PORT; + break; + + case 'U': + /* Set the UDP port number. */ + if (!isdigit((unsigned char)*optarg)) + usage(); + options.udp_port = strtol(optarg, NULL, 0); + optmask |= ARES_OPT_UDP_PORT; + break; + } + } + argc -= optind; + argv += optind; + if (argc == 0) + usage(); + + status = ares_init_options(&channel, &options, optmask); + if (status != ARES_SUCCESS) + { + fprintf(stderr, "ares_init_options: %s\n", + ares_strerror(status, &errmem)); + ares_free_errmem(errmem); + return 1; + } + + /* Initiate the queries, one per command-line argument. If there is + * only one query to do, supply NULL as the callback argument; + * otherwise, supply the query name as an argument so we can + * distinguish responses for the user when printing them out. + */ + if (argc == 1) + ares_query(channel, *argv, class, type, callback, (char *) NULL); + else + { + for (; *argv; argv++) + ares_query(channel, *argv, class, type, callback, *argv); + } + + /* Wait for all queries to complete. */ + while (1) + { + FD_ZERO(&read_fds); + FD_ZERO(&write_fds); + nfds = ares_fds(channel, &read_fds, &write_fds); + if (nfds == 0) + break; + tvp = ares_timeout(channel, NULL, &tv); + count = select(nfds, &read_fds, &write_fds, NULL, tvp); + if (count < 0 && errno != EINVAL) + { + perror("select"); + return 1; + } + ares_process(channel, &read_fds, &write_fds); + } + + ares_destroy(channel); + return 0; +} + +static void callback(void *arg, int status, unsigned char *abuf, int alen) +{ + char *name = (char *) arg, *errmem; + int id, qr, opcode, aa, tc, rd, ra, rcode, i; + unsigned int qdcount, ancount, nscount, arcount; + const unsigned char *aptr; + + /* Display the query name if given. */ + if (name) + printf("Answer for query %s:\n", name); + + /* Display an error message if there was an error, but only stop if + * we actually didn't get an answer buffer. + */ + if (status != ARES_SUCCESS) + { + printf("%s\n", ares_strerror(status, &errmem)); + ares_free_errmem(errmem); + if (!abuf) + return; + } + + /* Won't happen, but check anyway, for safety. */ + if (alen < HFIXEDSZ) + return; + + /* Parse the answer header. */ + id = DNS_HEADER_QID(abuf); + qr = DNS_HEADER_QR(abuf); + opcode = DNS_HEADER_OPCODE(abuf); + aa = DNS_HEADER_AA(abuf); + tc = DNS_HEADER_TC(abuf); + rd = DNS_HEADER_RD(abuf); + ra = DNS_HEADER_RA(abuf); + rcode = DNS_HEADER_RCODE(abuf); + qdcount = DNS_HEADER_QDCOUNT(abuf); + ancount = DNS_HEADER_ANCOUNT(abuf); + nscount = DNS_HEADER_NSCOUNT(abuf); + arcount = DNS_HEADER_ARCOUNT(abuf); + + /* Display the answer header. */ + printf("id: %d\n", id); + printf("flags: %s%s%s%s%s\n", + qr ? "qr " : "", + aa ? "aa " : "", + tc ? "tc " : "", + rd ? "rd " : "", + ra ? "ra " : ""); + printf("opcode: %s\n", opcodes[opcode]); + printf("rcode: %s\n", rcodes[rcode]); + + /* Display the questions. */ + printf("Questions:\n"); + aptr = abuf + HFIXEDSZ; + for (i = 0; i < qdcount; i++) + { + aptr = display_question(aptr, abuf, alen); + if (aptr == NULL) + return; + } + + /* Display the answers. */ + printf("Answers:\n"); + for (i = 0; i < ancount; i++) + { + aptr = display_rr(aptr, abuf, alen); + if (aptr == NULL) + return; + } + + /* Display the NS records. */ + printf("NS records:\n"); + for (i = 0; i < nscount; i++) + { + aptr = display_rr(aptr, abuf, alen); + if (aptr == NULL) + return; + } + + /* Display the additional records. */ + printf("Additional records:\n"); + for (i = 0; i < arcount; i++) + { + aptr = display_rr(aptr, abuf, alen); + if (aptr == NULL) + return; + } +} + +static const unsigned char *display_question(const unsigned char *aptr, + const unsigned char *abuf, + int alen) +{ + char *name; + int type, class, status, len; + + /* Parse the question name. */ + status = ares_expand_name(aptr, abuf, alen, &name, &len); + if (status != ARES_SUCCESS) + return NULL; + aptr += len; + + /* Make sure there's enough data after the name for the fixed part + * of the question. + */ + if (aptr + QFIXEDSZ > abuf + alen) + { + free(name); + return NULL; + } + + /* Parse the question type and class. */ + type = DNS_QUESTION_TYPE(aptr); + class = DNS_QUESTION_CLASS(aptr); + aptr += QFIXEDSZ; + + /* Display the question, in a format sort of similar to how we will + * display RRs. + */ + printf("\t%-15s.\t", name); + if (class != C_IN) + printf("\t%s", class_name(class)); + printf("\t%s\n", type_name(type)); + free(name); + return aptr; +} + +static const unsigned char *display_rr(const unsigned char *aptr, + const unsigned char *abuf, int alen) +{ + const unsigned char *p; + char *name; + int type, class, ttl, dlen, status, len; + struct in_addr addr; + + /* Parse the RR name. */ + status = ares_expand_name(aptr, abuf, alen, &name, &len); + if (status != ARES_SUCCESS) + return NULL; + aptr += len; + + /* Make sure there is enough data after the RR name for the fixed + * part of the RR. + */ + if (aptr + RRFIXEDSZ > abuf + alen) + { + free(name); + return NULL; + } + + /* Parse the fixed part of the RR, and advance to the RR data + * field. */ + type = DNS_RR_TYPE(aptr); + class = DNS_RR_CLASS(aptr); + ttl = DNS_RR_TTL(aptr); + dlen = DNS_RR_LEN(aptr); + aptr += RRFIXEDSZ; + if (aptr + dlen > abuf + alen) + { + free(name); + return NULL; + } + + /* Display the RR name, class, and type. */ + printf("\t%-15s.\t%d", name, ttl); + if (class != C_IN) + printf("\t%s", class_name(class)); + printf("\t%s", type_name(type)); + free(name); + + /* Display the RR data. Don't touch aptr. */ + switch (type) + { + case T_CNAME: + case T_MB: + case T_MD: + case T_MF: + case T_MG: + case T_MR: + case T_NS: + case T_PTR: + /* For these types, the RR data is just a domain name. */ + status = ares_expand_name(aptr, abuf, alen, &name, &len); + if (status != ARES_SUCCESS) + return NULL; + printf("\t%s.", name); + free(name); + break; + + case T_HINFO: + /* The RR data is two length-counted character strings. */ + p = aptr; + len = *p; + if (p + len + 1 > aptr + dlen) + return NULL; + printf("\t%.*s", len, p + 1); + p += len + 1; + len = *p; + if (p + len + 1 > aptr + dlen) + return NULL; + printf("\t%.*s", len, p + 1); + break; + + case T_MINFO: + /* The RR data is two domain names. */ + p = aptr; + status = ares_expand_name(p, abuf, alen, &name, &len); + if (status != ARES_SUCCESS) + return NULL; + printf("\t%s.", name); + free(name); + p += len; + status = ares_expand_name(p, abuf, alen, &name, &len); + if (status != ARES_SUCCESS) + return NULL; + printf("\t%s.", name); + free(name); + break; + + case T_MX: + /* The RR data is two bytes giving a preference ordering, and + * then a domain name. + */ + if (dlen < 2) + return NULL; + printf("\t%d", (aptr[0] << 8) | aptr[1]); + status = ares_expand_name(aptr + 2, abuf, alen, &name, &len); + if (status != ARES_SUCCESS) + return NULL; + printf("\t%s.", name); + free(name); + break; + + case T_SOA: + /* The RR data is two domain names and then five four-byte + * numbers giving the serial number and some timeouts. + */ + p = aptr; + status = ares_expand_name(p, abuf, alen, &name, &len); + if (status != ARES_SUCCESS) + return NULL; + printf("\t%s.\n", name); + free(name); + p += len; + status = ares_expand_name(p, abuf, alen, &name, &len); + if (status != ARES_SUCCESS) + return NULL; + printf("\t\t\t\t\t\t%s.\n", name); + free(name); + p += len; + if (p + 20 > aptr + dlen) + return NULL; + printf("\t\t\t\t\t\t( %d %d %d %d %d )", + (p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3], + (p[4] << 24) | (p[5] << 16) | (p[6] << 8) | p[7], + (p[8] << 24) | (p[9] << 16) | (p[10] << 8) | p[11], + (p[12] << 24) | (p[13] << 16) | (p[14] << 8) | p[15], + (p[16] << 24) | (p[17] << 16) | (p[18] << 8) | p[19]); + break; + + case T_TXT: + /* The RR data is one or more length-counted character + * strings. */ + p = aptr; + while (p < aptr + dlen) + { + len = *p; + if (p + len + 1 > aptr + dlen) + return NULL; + printf("\t%.*s", len, p + 1); + p += len + 1; + } + break; + + case T_A: + /* The RR data is a four-byte Internet address. */ + if (dlen != 4) + return NULL; + memcpy(&addr, aptr, sizeof(struct in_addr)); + printf("\t%s", inet_ntoa(addr)); + break; + + case T_WKS: + /* Not implemented yet */ + break; + } + printf("\n"); + + return aptr + dlen; +} + +static const char *type_name(int type) +{ + int i; + + for (i = 0; i < ntypes; i++) + { + if (types[i].value == type) + return types[i].name; + } + return "(unknown)"; +} + +static const char *class_name(int class) +{ + int i; + + for (i = 0; i < nclasses; i++) + { + if (classes[i].value == class) + return classes[i].name; + } + return "(unknown)"; +} + +static void usage(void) +{ + fprintf(stderr, "usage: adig [-f flag] [-s server] [-c class] " + "[-t type] [-p port] name ...\n"); + exit(1); +} diff --git a/libares/ahost.c b/libares/ahost.c new file mode 100644 index 0000000..bea4e2c --- /dev/null +++ b/libares/ahost.c @@ -0,0 +1,110 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ahost.c,v 1.3 1999/10/23 19:28:13 danw Exp $"; + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "ares.h" +#include "ares_dns.h" + +#ifndef INADDR_NONE +#define INADDR_NONE 0xffffffff +#endif + +static void callback(void *arg, int status, struct hostent *host); +static void usage(void); + +int main(int argc, char **argv) +{ + ares_channel channel; + int status, nfds; + fd_set read_fds, write_fds; + struct timeval *tvp, tv; + char *errmem; + struct in_addr addr; + + if (argc == 0) + usage(); + + status = ares_init(&channel); + if (status != ARES_SUCCESS) + { + fprintf(stderr, "ares_init: %s\n", ares_strerror(status, &errmem)); + ares_free_errmem(errmem); + return 1; + } + + /* Initiate the queries, one per command-line argument. */ + for (argv++; *argv; argv++) + { + addr.s_addr = inet_addr(*argv); + if (addr.s_addr == INADDR_NONE) + ares_gethostbyname(channel, *argv, AF_INET, callback, *argv); + else + { + ares_gethostbyaddr(channel, &addr, sizeof(addr), AF_INET, callback, + *argv); + } + } + + /* Wait for all queries to complete. */ + while (1) + { + FD_ZERO(&read_fds); + FD_ZERO(&write_fds); + nfds = ares_fds(channel, &read_fds, &write_fds); + if (nfds == 0) + break; + tvp = ares_timeout(channel, NULL, &tv); + select(nfds, &read_fds, &write_fds, NULL, tvp); + ares_process(channel, &read_fds, &write_fds); + } + + ares_destroy(channel); + return 0; +} + +static void callback(void *arg, int status, struct hostent *host) +{ + struct in_addr addr; + char *mem, **p; + + if (status != ARES_SUCCESS) + { + fprintf(stderr, "%s: %s\n", (char *) arg, ares_strerror(status, &mem)); + ares_free_errmem(mem); + return; + } + + for (p = host->h_addr_list; *p; p++) + { + memcpy(&addr, *p, sizeof(struct in_addr)); + printf("%-32s\t%s\n", host->h_name, inet_ntoa(addr)); + } +} + +static void usage(void) +{ + fprintf(stderr, "usage: ahost {host|addr} ...\n"); + exit(1); +} diff --git a/libares/ares.h b/libares/ares.h new file mode 100644 index 0000000..9850fc9 --- /dev/null +++ b/libares/ares.h @@ -0,0 +1,124 @@ +/* $Id: ares.h,v 1.2 2000/01/05 16:29:43 ghudson Exp $ */ + +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +#ifndef ARES__H +#define ARES__H + +#include +#include + +#define ARES_SUCCESS 0 + +/* Server error codes (ARES_ENODATA indicates no relevant answer) */ +#define ARES_ENODATA 1 +#define ARES_EFORMERR 2 +#define ARES_ESERVFAIL 3 +#define ARES_ENOTFOUND 4 +#define ARES_ENOTIMP 5 +#define ARES_EREFUSED 6 + +/* Locally generated error codes */ +#define ARES_EBADQUERY 7 +#define ARES_EBADNAME 8 +#define ARES_EBADFAMILY 9 +#define ARES_EBADRESP 10 +#define ARES_ECONNREFUSED 11 +#define ARES_ETIMEOUT 12 +#define ARES_EOF 13 +#define ARES_EFILE 14 +#define ARES_ENOMEM 15 +#define ARES_EDESTRUCTION 16 + +/* Flag values */ +#define ARES_FLAG_USEVC (1 << 0) +#define ARES_FLAG_PRIMARY (1 << 1) +#define ARES_FLAG_IGNTC (1 << 2) +#define ARES_FLAG_NORECURSE (1 << 3) +#define ARES_FLAG_STAYOPEN (1 << 4) +#define ARES_FLAG_NOSEARCH (1 << 5) +#define ARES_FLAG_NOALIASES (1 << 6) +#define ARES_FLAG_NOCHECKRESP (1 << 7) + +/* Option mask values */ +#define ARES_OPT_FLAGS (1 << 0) +#define ARES_OPT_TIMEOUT (1 << 1) +#define ARES_OPT_TRIES (1 << 2) +#define ARES_OPT_NDOTS (1 << 3) +#define ARES_OPT_UDP_PORT (1 << 4) +#define ARES_OPT_TCP_PORT (1 << 5) +#define ARES_OPT_SERVERS (1 << 6) +#define ARES_OPT_DOMAINS (1 << 7) +#define ARES_OPT_LOOKUPS (1 << 8) + +struct ares_options { + int flags; + int timeout; + int tries; + int ndots; + unsigned short udp_port; + unsigned short tcp_port; + struct in_addr *servers; + int nservers; + char **domains; + int ndomains; + char *lookups; +}; + +struct hostent; +struct timeval; +struct ares_channeldata; +typedef struct ares_channeldata *ares_channel; +typedef void (*ares_callback)(void *arg, int status, unsigned char *abuf, + int alen); +typedef void (*ares_host_callback)(void *arg, int status, + struct hostent *hostent); + +int ares_init(ares_channel *channelptr); +int ares_init_options(ares_channel *channelptr, struct ares_options *options, + int optmask); +void ares_destroy(ares_channel channel); + +void ares_send(ares_channel channel, const unsigned char *qbuf, int qlen, + ares_callback callback, void *arg); +void ares_query(ares_channel channel, const char *name, int class, + int type, ares_callback callback, void *arg); +void ares_search(ares_channel channel, const char *name, int class, + int type, ares_callback callback, void *arg); +void ares_gethostbyname(ares_channel channel, const char *name, int family, + ares_host_callback callback, void *arg); +void ares_gethostbyaddr(ares_channel channel, const void *addr, int addrlen, + int family, ares_host_callback callback, void *arg); + +int ares_fds(ares_channel channel, fd_set *read_fds, fd_set *write_fds); +struct timeval *ares_timeout(ares_channel channel, struct timeval *maxtv, + struct timeval *tv); +void ares_process(ares_channel channel, fd_set *read_fds, fd_set *write_fds); + +int ares_mkquery(const char *name, int class, int type, unsigned short id, + int rd, unsigned char **buf, int *buflen); +int ares_expand_name(const unsigned char *encoded, const unsigned char *abuf, + int alen, char **s, int *enclen); +int ares_parse_a_reply(const unsigned char *abuf, int alen, + struct hostent **host); +int ares_parse_ptr_reply(const unsigned char *abuf, int alen, const void *addr, + int addrlen, int family, struct hostent **host); +void ares_free_string(char *str); +void ares_free_hostent(struct hostent *host); +const char *ares_strerror(int code, char **memptr); +void ares_free_errmem(char *mem); + +#endif /* ARES__H */ diff --git a/libares/ares__close_sockets.c b/libares/ares__close_sockets.c new file mode 100644 index 0000000..4a8279a --- /dev/null +++ b/libares/ares__close_sockets.c @@ -0,0 +1,54 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares__close_sockets.c,v 1.1 1998/08/13 18:06:22 ghudson Exp $"; + +#include +#include +#include "ares.h" +#include "ares_private.h" + +void ares__close_sockets(struct server_state *server) +{ + struct send_request *sendreq; + + /* Free all pending output buffers. */ + while (server->qhead) + { + /* Advance server->qhead; pull out query as we go. */ + sendreq = server->qhead; + server->qhead = sendreq->next; + free(sendreq); + } + server->qtail = NULL; + + /* Reset any existing input buffer. */ + if (server->tcp_buffer) + free(server->tcp_buffer); + server->tcp_buffer = NULL; + server->tcp_lenbuf_pos = 0; + + /* Close the TCP and UDP sockets. */ + if (server->tcp_socket != -1) + { + close(server->tcp_socket); + server->tcp_socket = -1; + } + if (server->udp_socket != -1) + { + close(server->udp_socket); + server->udp_socket = -1; + } +} diff --git a/libares/ares__get_hostent.c b/libares/ares__get_hostent.c new file mode 100644 index 0000000..3c645d8 --- /dev/null +++ b/libares/ares__get_hostent.c @@ -0,0 +1,164 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares__get_hostent.c,v 1.3 2000/02/17 18:39:58 ghudson Exp $"; + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "ares.h" +#include "ares_private.h" + +int ares__get_hostent(FILE *fp, struct hostent **host) +{ + char *line = NULL, *p, *q, *canonical, **alias; + int status, linesize, end_at_hostname, naliases; + struct in_addr addr; + struct hostent *hostent = NULL; + + while ((status = ares__read_line(fp, &line, &linesize)) == ARES_SUCCESS) + { + /* Skip comment lines; terminate line at comment character. */ + if (*line == '#' || !*line) + continue; + p = strchr(line, '#'); + if (p) + *p = 0; + + /* Get the address part. */ + p = line; + while (*p && !isspace((unsigned char)*p)) + p++; + if (!*p) + continue; + *p = 0; + addr.s_addr = inet_addr(line); + if (addr.s_addr == INADDR_NONE) + continue; + + /* Get the canonical hostname. */ + p++; + while (isspace((unsigned char)*p)) + p++; + if (!*p) + continue; + q = p; + while (*q && !isspace((unsigned char)*q)) + q++; + end_at_hostname = (*q == 0); + *q = 0; + canonical = p; + + naliases = 0; + if (!end_at_hostname) + { + /* Count the aliases. */ + p = q + 1; + while (isspace((unsigned char)*p)) + p++; + while (*p) + { + while (*p && !isspace((unsigned char)*p)) + p++; + while (isspace((unsigned char)*p)) + p++; + naliases++; + } + } + + /* Allocate memory for the host structure. */ + hostent = malloc(sizeof(struct hostent)); + if (!hostent) + break; + hostent->h_aliases = NULL; + hostent->h_addr_list = NULL; + hostent->h_name = strdup(canonical); + if (!hostent->h_name) + break; + hostent->h_addr_list = malloc(2 * sizeof(char *)); + if (!hostent->h_addr_list) + break; + hostent->h_addr_list[0] = malloc(sizeof(struct in_addr)); + if (!hostent->h_addr_list[0]) + break; + hostent->h_aliases = malloc((naliases + 1) * sizeof(char *)); + if (!hostent->h_aliases) + break; + + /* Copy in aliases. */ + naliases = 0; + if (!end_at_hostname) + { + p = canonical + strlen(canonical) + 1; + while (isspace((unsigned char)*p)) + p++; + while (*p) + { + q = p; + while (*q && !isspace((unsigned char)*q)) + q++; + hostent->h_aliases[naliases] = malloc(q - p + 1); + if (hostent->h_aliases[naliases] == NULL) + break; + memcpy(hostent->h_aliases[naliases], p, q - p); + hostent->h_aliases[naliases][q - p] = 0; + p = q; + while (isspace((unsigned char)*p)) + p++; + naliases++; + } + if (*p) + break; + } + hostent->h_aliases[naliases] = NULL; + + hostent->h_addrtype = AF_INET; + hostent->h_length = sizeof(struct in_addr); + memcpy(hostent->h_addr_list[0], &addr, sizeof(struct in_addr)); + hostent->h_addr_list[1] = NULL; + *host = hostent; + free(line); + return ARES_SUCCESS; + } + free(line); + + if (status == ARES_SUCCESS) + { + /* Memory allocation failure; clean up. */ + if (hostent) + { + free((char *) hostent->h_name); + if (hostent->h_aliases) + { + for (alias = hostent->h_aliases; *alias; alias++) + free(*alias); + } + free(hostent->h_aliases); + if (hostent->h_addr_list) + free(hostent->h_addr_list[0]); + free(hostent->h_addr_list); + } + free(hostent); + return ARES_ENOMEM; + } + + return status; +} diff --git a/libares/ares__read_line.c b/libares/ares__read_line.c new file mode 100644 index 0000000..1a4a86d --- /dev/null +++ b/libares/ares__read_line.c @@ -0,0 +1,64 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares__read_line.c,v 1.2 1998/11/02 19:13:43 ghudson Exp $"; + +#include +#include +#include +#include "ares.h" +#include "ares_private.h" + +/* This is an internal function. Its contract is to read a line from + * a file into a dynamically allocated buffer, zeroing the trailing + * newline if there is one. The calling routine may call + * ares__read_line multiple times with the same buf and bufsize + * pointers; *buf will be reallocated and *bufsize adjusted as + * appropriate. The initial value of *buf should be NULL. After the + * calling routine is done reading lines, it should free *buf. + */ +int ares__read_line(FILE *fp, char **buf, int *bufsize) +{ + char *newbuf; + int offset = 0, len; + + if (*buf == NULL) + { + *buf = malloc(128); + if (!*buf) + return ARES_ENOMEM; + *bufsize = 128; + } + + while (1) + { + if (!fgets(*buf + offset, *bufsize - offset, fp)) + return (offset != 0) ? 0 : (ferror(fp)) ? ARES_EFILE : ARES_EOF; + len = offset + strlen(*buf + offset); + if ((*buf)[len - 1] == '\n') + { + (*buf)[len - 1] = 0; + return ARES_SUCCESS; + } + offset = len; + + /* Allocate more space. */ + newbuf = realloc(*buf, *bufsize * 2); + if (!newbuf) + return ARES_ENOMEM; + *buf = newbuf; + *bufsize *= 2; + } +} diff --git a/libares/ares_destroy.3 b/libares/ares_destroy.3 new file mode 100644 index 0000000..af9e5c5 --- /dev/null +++ b/libares/ares_destroy.3 @@ -0,0 +1,43 @@ +.\" $Id: ares_destroy.3,v 1.1 1998/08/13 18:07:28 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_DESTROY 3 "23 July 1998" +.SH NAME +ares_destroy \- Destroy a resolver channel +.SH SYNOPSIS +.nf +.B #include +.PP +.B int ares_destroy(ares_channel \fIchannel\fP) +.fi +.SH DESCRIPTION +The +.B ares_destroy +function destroys the name service channel identified by +.IR channel , +freeing all memory and closing all sockets used by the channel. +.B ares_destroy +invokes the callbacks for each pending query on the channel, passing a +status of +.BR ARES_EDESTRUCTION . +These calls give the callbacks a chance to clean up any state which +might have been stored in their arguments. +.SH SEE ALSO +.BR ares_init (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_destroy.c b/libares/ares_destroy.c new file mode 100644 index 0000000..ca997f3 --- /dev/null +++ b/libares/ares_destroy.c @@ -0,0 +1,45 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_destroy.c,v 1.2 1998/09/22 01:46:10 ghudson Exp $"; + +#include +#include "ares.h" +#include "ares_private.h" + +void ares_destroy(ares_channel channel) +{ + int i; + struct query *query; + + for (i = 0; i < channel->nservers; i++) + ares__close_sockets(&channel->servers[i]); + free(channel->servers); + for (i = 0; i < channel->ndomains; i++) + free(channel->domains[i]); + free(channel->domains); + free(channel->sortlist); + free(channel->lookups); + while (channel->queries) + { + query = channel->queries; + channel->queries = query->next; + query->callback(query->arg, ARES_EDESTRUCTION, NULL, 0); + free(query->tcpbuf); + free(query->skip_server); + free(query); + } + free(channel); +} diff --git a/libares/ares_dns.h b/libares/ares_dns.h new file mode 100644 index 0000000..b01bdcc --- /dev/null +++ b/libares/ares_dns.h @@ -0,0 +1,81 @@ +/* $Id: ares_dns.h,v 1.2 2000/02/17 18:38:16 ghudson Exp $ */ + +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +#ifndef ARES__DNS_H +#define ARES__DNS_H + +#define DNS__16BIT(p) (((p)[0] << 8) | (p)[1]) +#define DNS__32BIT(p) (((p)[0] << 24) | ((p)[1] << 16) | \ + ((p)[2] << 8) | (p)[3]) +#define DNS__SET16BIT(p, v) (((p)[0] = ((v) >> 8) & 0xff), \ + ((p)[1] = (v) & 0xff)) +#define DNS__SET32BIT(p, v) (((p)[0] = ((v) >> 24) & 0xff), \ + ((p)[1] = ((v) >> 16) & 0xff), \ + ((p)[2] = ((v) >> 8) & 0xff), \ + ((p)[3] = (v) & 0xff)) + +/* Macros for parsing a DNS header */ +#define DNS_HEADER_QID(h) DNS__16BIT(h) +#define DNS_HEADER_QR(h) (((h)[2] >> 7) & 0x1) +#define DNS_HEADER_OPCODE(h) (((h)[2] >> 3) & 0xf) +#define DNS_HEADER_AA(h) (((h)[2] >> 2) & 0x1) +#define DNS_HEADER_TC(h) (((h)[2] >> 1) & 0x1) +#define DNS_HEADER_RD(h) ((h)[2] & 0x1) +#define DNS_HEADER_RA(h) (((h)[3] >> 7) & 0x1) +#define DNS_HEADER_Z(h) (((h)[3] >> 4) & 0x7) +#define DNS_HEADER_RCODE(h) ((h)[3] & 0xf) +#define DNS_HEADER_QDCOUNT(h) DNS__16BIT((h) + 4) +#define DNS_HEADER_ANCOUNT(h) DNS__16BIT((h) + 6) +#define DNS_HEADER_NSCOUNT(h) DNS__16BIT((h) + 8) +#define DNS_HEADER_ARCOUNT(h) DNS__16BIT((h) + 10) + +/* Macros for constructing a DNS header */ +#define DNS_HEADER_SET_QID(h, v) DNS__SET16BIT(h, v) +#define DNS_HEADER_SET_QR(h, v) ((h)[2] |= (((v) & 0x1) << 7)) +#define DNS_HEADER_SET_OPCODE(h, v) ((h)[2] |= (((v) & 0xf) << 3)) +#define DNS_HEADER_SET_AA(h, v) ((h)[2] |= (((v) & 0x1) << 2)) +#define DNS_HEADER_SET_TC(h, v) ((h)[2] |= (((v) & 0x1) << 1)) +#define DNS_HEADER_SET_RD(h, v) ((h)[2] |= (((v) & 0x1))) +#define DNS_HEADER_SET_RA(h, v) ((h)[3] |= (((v) & 0x1) << 7)) +#define DNS_HEADER_SET_Z(h, v) ((h)[3] |= (((v) & 0x7) << 4)) +#define DNS_HEADER_SET_RCODE(h, v) ((h)[3] |= (((v) & 0xf))) +#define DNS_HEADER_SET_QDCOUNT(h, v) DNS__SET16BIT((h) + 4, v) +#define DNS_HEADER_SET_ANCOUNT(h, v) DNS__SET16BIT((h) + 6, v) +#define DNS_HEADER_SET_NSCOUNT(h, v) DNS__SET16BIT((h) + 8, v) +#define DNS_HEADER_SET_ARCOUNT(h, v) DNS__SET16BIT((h) + 10, v) + +/* Macros for parsing the fixed part of a DNS question */ +#define DNS_QUESTION_TYPE(q) DNS__16BIT(q) +#define DNS_QUESTION_CLASS(q) DNS__16BIT((q) + 2) + +/* Macros for constructing the fixed part of a DNS question */ +#define DNS_QUESTION_SET_TYPE(q, v) DNS__SET16BIT(q, v) +#define DNS_QUESTION_SET_CLASS(q, v) DNS__SET16BIT((q) + 2, v) + +/* Macros for parsing the fixed part of a DNS resource record */ +#define DNS_RR_TYPE(r) DNS__16BIT(r) +#define DNS_RR_CLASS(r) DNS__16BIT((r) + 2) +#define DNS_RR_TTL(r) DNS__32BIT((r) + 4) +#define DNS_RR_LEN(r) DNS__16BIT((r) + 8) + +/* Macros for constructing the fixed part of a DNS resource record */ +#define DNS_RR_SET_TYPE(r) DNS__SET16BIT(r, v) +#define DNS_RR_SET_CLASS(r) DNS__SET16BIT((r) + 2, v) +#define DNS_RR_SET_TTL(r) DNS__SET32BIT((r) + 4, v) +#define DNS_RR_SET_LEN(r) DNS__SET16BIT((r) + 8, v) + +#endif /* ARES__DNS_H */ diff --git a/libares/ares_expand_name.3 b/libares/ares_expand_name.3 new file mode 100644 index 0000000..c5b45cc --- /dev/null +++ b/libares/ares_expand_name.3 @@ -0,0 +1,65 @@ +.\" $Id: ares_expand_name.3,v 1.1 1998/08/13 18:07:28 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_EXPAND_NAME 3 "23 July 1998" +.SH NAME +ares_expand_name \- Expand a DNS-encoded domain name +.SH SYNOPSIS +.nf +.B #include +.PP +.B int ares_expand_name(const unsigned char *\fIencoded\fP, +.B + const unsigned char *\fIabuf\fP, int \fIalen\fP, char **\fIs\fP, +.B int *\fIenclen\fP) +.fi +.SH DESCRIPTION +The +.B ares_expand_name +function converts a DNS-encoded domain name to a dot-separated C +string. The argument +.I encoded +gives the beginning of the encoded domain name, and the arguments +.I abuf +and +.I alen +give the containing message buffer (necessary for the processing of +indirection pointers within the encoded domain name). The result is +placed in a NUL-terminated allocated buffer, a pointer to which is +stored in the variable pointed to by +.IR s . +The length of the encoded name is stored in the variable pointed to by +.I enclen +so that the caller can advance past the encoded domain name to read +further data in the message. +.SH RETURN VALUES +.B ares_expand_name +can return any of the following values: +.TP 15 +.B ARES_SUCCESS +Expansion of the encoded name succeeded. +.TP 15 +.B ARES_EBADNAME +The encoded domain name was malformed and could not be expanded. +.TP 15 +.B ARES_ENOMEM +Memory was exhausted. +.SH SEE ALSO +.BR ares_mkquery (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_expand_name.c b/libares/ares_expand_name.c new file mode 100644 index 0000000..dc9aaf0 --- /dev/null +++ b/libares/ares_expand_name.c @@ -0,0 +1,153 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_expand_name.c,v 1.3 2000/02/17 18:43:07 ghudson Exp $"; + +#include +#include +#include +#include +#include "ares.h" + +static int name_length(const unsigned char *encoded, const unsigned char *abuf, + int alen); + +/* Expand an RFC1035-encoded domain name given by encoded. The + * containing message is given by abuf and alen. The result given by + * *s, which is set to a NUL-terminated allocated buffer. *enclen is + * set to the length of the encoded name (not the length of the + * expanded name; the goal is to tell the caller how many bytes to + * move forward to get past the encoded name). + * + * In the simple case, an encoded name is a series of labels, each + * composed of a one-byte length (limited to values between 0 and 63 + * inclusive) followed by the label contents. The name is terminated + * by a zero-length label. + * + * In the more complicated case, a label may be terminated by an + * indirection pointer, specified by two bytes with the high bits of + * the first byte (corresponding to INDIR_MASK) set to 11. With the + * two high bits of the first byte stripped off, the indirection + * pointer gives an offset from the beginning of the containing + * message with more labels to decode. Indirection can happen an + * arbitrary number of times, so we have to detect loops. + * + * Since the expanded name uses '.' as a label separator, we use + * backslashes to escape periods or backslashes in the expanded name. + */ + +int ares_expand_name(const unsigned char *encoded, const unsigned char *abuf, + int alen, char **s, int *enclen) +{ + int len, indir = 0; + char *q; + const unsigned char *p; + + len = name_length(encoded, abuf, alen); + if (len == -1) + return ARES_EBADNAME; + + *s = malloc(len + 1); + if (!*s) + return ARES_ENOMEM; + q = *s; + + /* No error-checking necessary; it was all done by name_length(). */ + p = encoded; + while (*p) + { + if ((*p & INDIR_MASK) == INDIR_MASK) + { + if (!indir) + { + *enclen = p + 2 - encoded; + indir = 1; + } + p = abuf + ((*p & ~INDIR_MASK) << 8 | *(p + 1)); + } + else + { + len = *p; + p++; + while (len--) + { + if (*p == '.' || *p == '\\') + *q++ = '\\'; + *q++ = *p; + p++; + } + *q++ = '.'; + } + } + if (!indir) + *enclen = p + 1 - encoded; + + /* Nuke the trailing period if we wrote one. */ + if (q > *s) + *(q - 1) = 0; + + return ARES_SUCCESS; +} + +/* Return the length of the expansion of an encoded domain name, or + * -1 if the encoding is invalid. + */ +static int name_length(const unsigned char *encoded, const unsigned char *abuf, + int alen) +{ + int n = 0, offset, indir = 0; + + /* Allow the caller to pass us abuf + alen and have us check for it. */ + if (encoded == abuf + alen) + return -1; + + while (*encoded) + { + if ((*encoded & INDIR_MASK) == INDIR_MASK) + { + /* Check the offset and go there. */ + if (encoded + 1 >= abuf + alen) + return -1; + offset = (*encoded & ~INDIR_MASK) << 8 | *(encoded + 1); + if (offset >= alen) + return -1; + encoded = abuf + offset; + + /* If we've seen more indirects than the message length, + * then there's a loop. + */ + if (++indir > alen) + return -1; + } + else + { + offset = *encoded; + if (encoded + offset + 1 >= abuf + alen) + return -1; + encoded++; + while (offset--) + { + n += (*encoded == '.' || *encoded == '\\') ? 2 : 1; + encoded++; + } + n++; + } + } + + /* If there were any labels at all, then the number of dots is one + * less than the number of labels, so subtract one. + */ + return (n) ? n - 1 : n; +} diff --git a/libares/ares_fds.3 b/libares/ares_fds.3 new file mode 100644 index 0000000..9703048 --- /dev/null +++ b/libares/ares_fds.3 @@ -0,0 +1,62 @@ +.\" $Id: ares_fds.3,v 1.1 1998/08/13 18:07:29 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_FDS 3 "23 July 1998" +.SH NAME +ares_fds \- Get file descriptors to select on for name service +.SH SYNOPSIS +.nf +.B #include +.PP +.B int ares_fds(ares_channel \fIchannel\fP, fd_set *\fIread_fds\fP, +.B fd_set *\fIwrite_fds\fP) +.fi +.SH DESCRIPTION +The +.B ares_fds +function retrieves the set of file descriptors which the calling +application should select on for reading and writing for the +processing of name service queries pending on the name service channel +identified by +.IR channel . +File descriptors will be set in the file descriptor sets pointed to by +.I read_fds +and +.I write_fds +as appropriate. File descriptors already set in +.I read_fds +and +.I write_fds +will remain set; initialization of the file descriptor sets +(using +.BR FD_ZERO ) +is the responsibility of the caller. +.SH RETURN VALUES +.B ares_fds +returns one greater than the number of the highest socket set in either +.I read_fds +or +.IR write_fds . +If no queries are active, +.B ares_fds +will return 0. +.SH SEE ALSO +.BR ares_timeout (3), +.BR ares_process (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_fds.c b/libares/ares_fds.c new file mode 100644 index 0000000..5621b5b --- /dev/null +++ b/libares/ares_fds.c @@ -0,0 +1,52 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_fds.c,v 1.2 1998/09/04 21:09:30 ghudson Exp $"; + +#include +#include +#include "ares.h" +#include "ares_private.h" + +int ares_fds(ares_channel channel, fd_set *read_fds, fd_set *write_fds) +{ + struct server_state *server; + int i, nfds; + + /* No queries, no file descriptors. */ + if (!channel->queries) + return 0; + + nfds = 0; + for (i = 0; i < channel->nservers; i++) + { + server = &channel->servers[i]; + if (server->udp_socket != -1) + { + FD_SET(server->udp_socket, read_fds); + if (server->udp_socket >= nfds) + nfds = server->udp_socket + 1; + } + if (server->tcp_socket != -1) + { + FD_SET(server->tcp_socket, read_fds); + if (server->qhead) + FD_SET(server->tcp_socket, write_fds); + if (server->tcp_socket >= nfds) + nfds = server->tcp_socket + 1; + } + } + return nfds; +} diff --git a/libares/ares_free_errmem.3 b/libares/ares_free_errmem.3 new file mode 100644 index 0000000..c6b812c --- /dev/null +++ b/libares/ares_free_errmem.3 @@ -0,0 +1,42 @@ +.\" $Id: ares_free_errmem.3,v 1.1 1998/08/13 18:07:29 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_FREE_ERRMEM 3 "23 July 1998" +.SH NAME +ares_free_errmem \- Free memory allocated by ares_strerror +.SH SYNOPSIS +.nf +.B #include +.PP +.B void ares_free_errmem(char *\fIerrmem\fP) +.fi +.SH DESCRIPTION +The +.B ares_free_errmem +function frees any memory which might have been allocated by the +.BR ares_strerror (3) +function. The parameter +.I errmem +should be set to the variable pointed to by the +.I memptr +argument previously passed to +.IR ares_strerror . +.SH SEE ALSO +.BR ares_strerror (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_free_errmem.c b/libares/ares_free_errmem.c new file mode 100644 index 0000000..55e16fe --- /dev/null +++ b/libares/ares_free_errmem.c @@ -0,0 +1,26 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_free_errmem.c,v 1.1 1998/08/13 18:06:28 ghudson Exp $"; + +#include "ares.h" + +/* Do nothing, for now. A future implementation may want to deal with + * internationalization, in which case ares_strerror() might allocate + * memory which we would then have to free. + */ +void ares_free_errmem(char *mem) +{ +} diff --git a/libares/ares_free_hostent.3 b/libares/ares_free_hostent.3 new file mode 100644 index 0000000..61ee3f5 --- /dev/null +++ b/libares/ares_free_hostent.3 @@ -0,0 +1,49 @@ +.\" $Id: ares_free_hostent.3,v 1.1 1998/08/13 18:07:30 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_FREE_HOSTENT 3 "23 July 1998" +.SH NAME +ares_free_hostent \- Free host structure allocated by ares functions +.SH SYNOPSIS +.nf +.B #include +.PP +.B void ares_free_hostent(struct hostent *\fIhost\fP) +.fi +.SH DESCRIPTION +The +.I ares_free_hostent +function frees a +.B struct hostent +allocated by one of the functions +.I ares_parse_a_reply +or +.IR ares_parse_ptr_reply . +.SH SEE ALSO +.BR ares_parse_a_reply (3), +.BR ares_parse_ptr_reply (3) +.SH NOTES +It is not necessary (and is not correct) to free the host structure +passed to the callback functions for +.I ares_gethostbyname +or +.IR ares_gethostbyaddr . +The ares library will automatically free such host structures when the +callback returns. +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_free_hostent.c b/libares/ares_free_hostent.c new file mode 100644 index 0000000..c52301b --- /dev/null +++ b/libares/ares_free_hostent.c @@ -0,0 +1,33 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_free_hostent.c,v 1.2 1998/09/22 01:46:38 ghudson Exp $"; + +#include +#include +#include "ares.h" + +void ares_free_hostent(struct hostent *host) +{ + char **p; + + free(host->h_name); + for (p = host->h_aliases; *p; p++) + free(*p); + free(host->h_aliases); + free(host->h_addr_list[0]); + free(host->h_addr_list); + free(host); +} diff --git a/libares/ares_free_string.3 b/libares/ares_free_string.3 new file mode 100644 index 0000000..89daf75 --- /dev/null +++ b/libares/ares_free_string.3 @@ -0,0 +1,37 @@ +.\" $Id: ares_free_string.3,v 1.1 2000/01/05 16:29:43 ghudson Exp $ +.\" +.\" Copyright 2000 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_FREE_STRING 3 "4 January 2000" +.SH NAME +ares_free_string \- Free strings allocated by ares functions +.SH SYNOPSIS +.nf +.B #include +.PP +.B void ares_free_string(char *\fIstr\fP) +.fi +.SH DESCRIPTION +The +.I ares_free_string +function frees a string allocated by the +.I ares_mkquery +function. +.SH SEE ALSO +.BR ares_mkquery (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 2000 by the Massachusetts Institute of Technology. diff --git a/libares/ares_free_string.c b/libares/ares_free_string.c new file mode 100644 index 0000000..bb9ab9e --- /dev/null +++ b/libares/ares_free_string.c @@ -0,0 +1,24 @@ +/* Copyright 2000 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_free_string.c,v 1.1 2000/01/05 16:29:43 ghudson Exp $"; + +#include +#include "ares.h" + +void ares_free_string(char *str) +{ + free(str); +} diff --git a/libares/ares_gethostbyaddr.3 b/libares/ares_gethostbyaddr.3 new file mode 100644 index 0000000..3f2ab7f --- /dev/null +++ b/libares/ares_gethostbyaddr.3 @@ -0,0 +1,100 @@ +.\" $Id: ares_gethostbyaddr.3,v 1.1 1998/08/13 18:07:30 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_GETHOSTBYADDR 3 "24 July 1998" +.SH NAME +ares_gethostbyaddr \- Initiate a host query by address +.SH SYNOPSIS +.nf +.B #include +.PP +.B typedef void (*ares_host_callback)(void *\fIarg\fP, int \fIstatus\fP, +.B struct hostent *\fIhostent\fP) +.PP +.B void ares_gethostbyaddr(ares_channel \fIchannel\fP, const void *\fIaddr\fP, +.B int \fIaddrlen\fP, int \fIfamily\fP, ares_host_callback \fIcallback\fP, +.B void *\fIarg\fP) +.fi +.SH DESCRIPTION +The +.B ares_gethostbyaddr +function initiates a host query by address on the name service channel +identified by +.IR channel . +The parameters +.I addr +and +.I addrlen +give the address as a series of bytes, and +.I family +gives the type of address. When the query is complete or has failed, +the ares library will invoke +.IR callback . +Completion or failure of the query may happen immediately, or may +happen during a later call to +.BR ares_process (3) +or +.BR ares_destroy (3). +.PP +The callback argument +.I arg +is copied from the +.B ares_gethostbyaddr +argument +.IR arg . +The callback argument +.I status +indicates whether the query succeeded and, if not, how it failed. It +may have any of the following values: +.TP 19 +.B ARES_SUCCESS +The host lookup completed successfully. +.TP 19 +.B ARES_ENOTIMP +The ares library does not know how to look up addresses of type +.IR family . +.TP 19 +.B ARES_ENOTFOUND +The address +.I addr +was not found. +.TP 19 +.B ARES_ENOMEM +Memory was exhausted. +.TP 19 +.B ARES_EDESTRUCTION +The name service channel +.I channel +is being destroyed; the query will not be completed. +.PP +On successful completion of the query, the callback argument +.I hostent +points to a +.B struct hostent +containing the name of the host returned by the query. The callback +need not and should not attempt to free the memory pointed to by +.IR hostent ; +the ares library will free it when the callback returns. If the query +did not complete successfully, +.I hostent +will be +.BR NULL . +.SH SEE ALSO +.BR ares_process (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_gethostbyaddr.c b/libares/ares_gethostbyaddr.c new file mode 100644 index 0000000..a7eaa9e --- /dev/null +++ b/libares/ares_gethostbyaddr.c @@ -0,0 +1,155 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_gethostbyaddr.c,v 1.1 1998/08/13 18:06:29 ghudson Exp $"; + +#include +#include +#include +#include +#include +#include +#include +#include +#include "ares.h" +#include "ares_private.h" + +struct addr_query { + /* Arguments passed to ares_gethostbyaddr() */ + ares_channel channel; + struct in_addr addr; + ares_host_callback callback; + void *arg; + + const char *remaining_lookups; +}; + +static void next_lookup(struct addr_query *aquery); +static void addr_callback(void *arg, int status, unsigned char *abuf, + int alen); +static void end_aquery(struct addr_query *aquery, int status, + struct hostent *host); +static int file_lookup(struct in_addr *addr, struct hostent **host); + +void ares_gethostbyaddr(ares_channel channel, const void *addr, int addrlen, + int family, ares_host_callback callback, void *arg) +{ + struct addr_query *aquery; + + if (family != AF_INET || addrlen != sizeof(struct in_addr)) + { + callback(arg, ARES_ENOTIMP, NULL); + return; + } + + aquery = malloc(sizeof(struct addr_query)); + if (!aquery) + { + callback(arg, ARES_ENOMEM, NULL); + return; + } + aquery->channel = channel; + memcpy(&aquery->addr, addr, sizeof(aquery->addr)); + aquery->callback = callback; + aquery->arg = arg; + aquery->remaining_lookups = channel->lookups; + + next_lookup(aquery); +} + +static void next_lookup(struct addr_query *aquery) +{ + const char *p; + char name[64]; + int a1, a2, a3, a4, status; + struct hostent *host; + unsigned long addr; + + for (p = aquery->remaining_lookups; *p; p++) + { + switch (*p) + { + case 'b': + addr = ntohl(aquery->addr.s_addr); + a1 = addr >> 24; + a2 = (addr >> 16) & 0xff; + a3 = (addr >> 8) & 0xff; + a4 = addr & 0xff; + sprintf(name, "%d.%d.%d.%d.in-addr.arpa", a4, a3, a2, a1); + aquery->remaining_lookups = p + 1; + ares_query(aquery->channel, name, C_IN, T_PTR, addr_callback, + aquery); + return; + case 'f': + status = file_lookup(&aquery->addr, &host); + if (status != ARES_ENOTFOUND) + { + end_aquery(aquery, status, host); + return; + } + break; + } + } + end_aquery(aquery, ARES_ENOTFOUND, NULL); +} + +static void addr_callback(void *arg, int status, unsigned char *abuf, int alen) +{ + struct addr_query *aquery = (struct addr_query *) arg; + struct hostent *host; + + if (status == ARES_SUCCESS) + { + status = ares_parse_ptr_reply(abuf, alen, &aquery->addr, + sizeof(struct in_addr), AF_INET, &host); + end_aquery(aquery, status, host); + } + else if (status == ARES_EDESTRUCTION) + end_aquery(aquery, status, NULL); + else + next_lookup(aquery); +} + +static void end_aquery(struct addr_query *aquery, int status, + struct hostent *host) +{ + aquery->callback(aquery->arg, status, host); + if (host) + ares_free_hostent(host); + free(aquery); +} + +static int file_lookup(struct in_addr *addr, struct hostent **host) +{ + FILE *fp; + int status; + + fp = fopen(PATH_HOSTS, "r"); + if (!fp) + return ARES_ENOTFOUND; + + while ((status = ares__get_hostent(fp, host)) == ARES_SUCCESS) + { + if (memcmp((*host)->h_addr, addr, sizeof(struct in_addr)) == 0) + break; + ares_free_hostent(*host); + } + fclose(fp); + if (status == ARES_EOF) + status = ARES_ENOTFOUND; + if (status != ARES_SUCCESS) + *host = NULL; + return status; +} diff --git a/libares/ares_gethostbyname.3 b/libares/ares_gethostbyname.3 new file mode 100644 index 0000000..7156ce5 --- /dev/null +++ b/libares/ares_gethostbyname.3 @@ -0,0 +1,103 @@ +.\" $Id: ares_gethostbyname.3,v 1.1 1998/08/13 18:07:31 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_GETHOSTBYNAME 3 "25 July 1998" +.SH NAME +ares_gethostbyname \- Initiate a host query by name +.SH SYNOPSIS +.nf +.B #include +.PP +.B typedef void (*ares_host_callback)(void *\fIarg\fP, int \fIstatus\fP, +.B struct hostent *\fIhostent\fP) +.PP +.B void ares_gethostbyname(ares_channel \fIchannel\fP, const char *\fIname\fP, +.B int \fIfamily\fP, ares_host_callback \fIcallback\fP, void *\fIarg\fP) +.fi +.SH DESCRIPTION +The +.B ares_gethostbyname +function initiates a host query by name on the name service channel +identified by +.IR channel . +The parameter +.I name +gives the hostname as a NUL-terminated C string, and +.I family +gives the desired type of address for the resulting host entry. When +the query is complete or has failed, the ares library will invoke +.IR callback . +Completion or failure of the query may happen immediately, or may +happen during a later call to +.BR ares_process (3) +or +.BR ares_destroy (3). +.PP +The callback argument +.I arg +is copied from the +.B ares_gethostbyname +argument +.IR arg . +The callback argument +.I status +indicates whether the query succeeded and, if not, how it failed. It +may have any of the following values: +.TP 19 +.B ARES_SUCCESS +The host lookup completed successfully. +.TP 19 +.B ARES_ENOTIMP +The ares library does not know how to find addresses of type +.IR family . +.TP 19 +.B ARES_EBADNAME +The hostname +.B name +is composed entirely of numbers and periods, but is not a valid +representation of an Internet address. +.TP 19 +.B ARES_ENOTFOUND +The address +.I addr +was not found. +.TP 19 +.B ARES_ENOMEM +Memory was exhausted. +.TP 19 +.B ARES_EDESTRUCTION +The name service channel +.I channel +is being destroyed; the query will not be completed. +.PP +On successful completion of the query, the callback argument +.I hostent +points to a +.B struct hostent +containing the name of the host returned by the query. The callback +need not and should not attempt to free the memory pointed to by +.IR hostent ; +the ares library will free it when the callback returns. If the query +did not complete successfully, +.I hostent +will be +.BR NULL . +.SH SEE ALSO +.BR ares_process (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_gethostbyname.c b/libares/ares_gethostbyname.c new file mode 100644 index 0000000..6f4ed69 --- /dev/null +++ b/libares/ares_gethostbyname.c @@ -0,0 +1,278 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_gethostbyname.c,v 1.7 1999/10/23 19:28:13 danw Exp $"; + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "ares.h" +#include "ares_private.h" + +struct host_query { + /* Arguments passed to ares_gethostbyname() */ + ares_channel channel; + char *name; + ares_host_callback callback; + void *arg; + + const char *remaining_lookups; +}; + +static void next_lookup(struct host_query *hquery); +static void host_callback(void *arg, int status, unsigned char *abuf, + int alen); +static void end_hquery(struct host_query *hquery, int status, + struct hostent *host); +static int fake_hostent(const char *name, ares_host_callback callback, + void *arg); +static int file_lookup(const char *name, struct hostent **host); +static void sort_addresses(struct hostent *host, struct apattern *sortlist, + int nsort); +static int get_address_index(struct in_addr *addr, struct apattern *sortlist, + int nsort); + +void ares_gethostbyname(ares_channel channel, const char *name, int family, + ares_host_callback callback, void *arg) +{ + struct host_query *hquery; + + /* Right now we only know how to look up Internet addresses. */ + if (family != AF_INET) + { + callback(arg, ARES_ENOTIMP, NULL); + return; + } + + if (fake_hostent(name, callback, arg)) + return; + + /* Allocate and fill in the host query structure. */ + hquery = malloc(sizeof(struct host_query)); + if (!hquery) + { + callback(arg, ARES_ENOMEM, NULL); + return; + } + hquery->channel = channel; + hquery->name = strdup(name); + if (!hquery->name) + { + free(hquery); + callback(arg, ARES_ENOMEM, NULL); + return; + } + hquery->callback = callback; + hquery->arg = arg; + hquery->remaining_lookups = channel->lookups; + + /* Start performing lookups according to channel->lookups. */ + next_lookup(hquery); +} + +static void next_lookup(struct host_query *hquery) +{ + int status; + const char *p; + struct hostent *host; + + for (p = hquery->remaining_lookups; *p; p++) + { + switch (*p) + { + case 'b': + /* DNS lookup */ + hquery->remaining_lookups = p + 1; + ares_search(hquery->channel, hquery->name, C_IN, T_A, host_callback, + hquery); + return; + + case 'f': + /* Host file lookup */ + status = file_lookup(hquery->name, &host); + if (status != ARES_ENOTFOUND) + { + end_hquery(hquery, status, host); + return; + } + break; + } + } + end_hquery(hquery, ARES_ENOTFOUND, NULL); +} + +static void host_callback(void *arg, int status, unsigned char *abuf, int alen) +{ + struct host_query *hquery = (struct host_query *) arg; + ares_channel channel = hquery->channel; + struct hostent *host; + + if (status == ARES_SUCCESS) + { + status = ares_parse_a_reply(abuf, alen, &host); + if (host && channel->nsort) + sort_addresses(host, channel->sortlist, channel->nsort); + end_hquery(hquery, status, host); + } + else if (status == ARES_EDESTRUCTION) + end_hquery(hquery, status, NULL); + else + next_lookup(hquery); +} + +static void end_hquery(struct host_query *hquery, int status, + struct hostent *host) +{ + hquery->callback(hquery->arg, status, host); + if (host) + ares_free_hostent(host); + free(hquery->name); + free(hquery); +} + +/* If the name looks like an IP address, fake up a host entry, end the + * query immediately, and return true. Otherwise return false. + */ +static int fake_hostent(const char *name, ares_host_callback callback, + void *arg) +{ + struct in_addr addr; + struct hostent hostent; + const char *p; + char *aliases[1] = { NULL }; + char *addrs[2]; + + /* It only looks like an IP address if it's all numbers and dots. */ + for (p = name; *p; p++) + { + if (!isdigit((unsigned char)*p) && *p != '.') + return 0; + } + + /* It also only looks like an IP address if it's non-zero-length and + * doesn't end with a dot. + */ + if (p == name || *(p - 1) == '.') + return 0; + + /* It looks like an IP address. Figure out what IP address it is. */ + addr.s_addr = inet_addr(name); + if (addr.s_addr == INADDR_NONE) + { + callback(arg, ARES_EBADNAME, NULL); + return 1; + } + + /* Duplicate the name, to avoid a constness violation. */ + hostent.h_name = strdup(name); + if (!hostent.h_name) + { + callback(arg, ARES_ENOMEM, NULL); + return 1; + } + + /* Fill in the rest of the host structure and terminate the query. */ + addrs[0] = (char *) &addr; + addrs[1] = NULL; + hostent.h_aliases = aliases; + hostent.h_addrtype = AF_INET; + hostent.h_length = sizeof(struct in_addr); + hostent.h_addr_list = addrs; + callback(arg, ARES_SUCCESS, &hostent); + + free(hostent.h_name); + return 1; +} + +static int file_lookup(const char *name, struct hostent **host) +{ + FILE *fp; + char **alias; + int status; + + fp = fopen(PATH_HOSTS, "r"); + if (!fp) + return ARES_ENOTFOUND; + + while ((status = ares__get_hostent(fp, host)) == ARES_SUCCESS) + { + if (strcasecmp((*host)->h_name, name) == 0) + break; + for (alias = (*host)->h_aliases; *alias; alias++) + { + if (strcasecmp(*alias, name) == 0) + break; + } + if (*alias) + break; + ares_free_hostent(*host); + } + fclose(fp); + if (status == ARES_EOF) + status = ARES_ENOTFOUND; + if (status != ARES_SUCCESS) + *host = NULL; + return status; +} + +static void sort_addresses(struct hostent *host, struct apattern *sortlist, + int nsort) +{ + struct in_addr a1, a2; + int i1, i2, ind1, ind2; + + /* This is a simple insertion sort, not optimized at all. i1 walks + * through the address list, with the loop invariant that everything + * to the left of i1 is sorted. In the loop body, the value at i1 is moved + * back through the list (via i2) until it is in sorted order. + */ + for (i1 = 0; host->h_addr_list[i1]; i1++) + { + memcpy(&a1, host->h_addr_list[i1], sizeof(struct in_addr)); + ind1 = get_address_index(&a1, sortlist, nsort); + for (i2 = i1 - 1; i2 >= 0; i2--) + { + memcpy(&a2, host->h_addr_list[i2], sizeof(struct in_addr)); + ind2 = get_address_index(&a2, sortlist, nsort); + if (ind2 <= ind1) + break; + memcpy(host->h_addr_list[i2 + 1], &a2, sizeof(struct in_addr)); + } + memcpy(host->h_addr_list[i2 + 1], &a1, sizeof(struct in_addr)); + } +} + +/* Find the first entry in sortlist which matches addr. Return nsort + * if none of them match. + */ +static int get_address_index(struct in_addr *addr, struct apattern *sortlist, + int nsort) +{ + int i; + + for (i = 0; i < nsort; i++) + { + if ((addr->s_addr & sortlist[i].mask.s_addr) == sortlist[i].addr.s_addr) + break; + } + return i; +} diff --git a/libares/ares_init.3 b/libares/ares_init.3 new file mode 100644 index 0000000..999653e --- /dev/null +++ b/libares/ares_init.3 @@ -0,0 +1,170 @@ +.\" $Id: ares_init.3,v 1.1 1998/08/13 18:07:31 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_INIT 3 "21 July 1998" +.SH NAME +ares_init, ares_init_options \- Initialize a resolver channel +.SH SYNOPSIS +.nf +.B #include +.PP +.B int ares_init(ares_channel *\fIchannel\fP) +.B int ares_init_options(ares_channel *\fIchannel\fP, +.B struct ares_options *\fIoptions\fP, int \fIoptmask\fP) +.PP +.B cc file.c -lares +.fi +.SH DESCRIPTION +The +.B ares_init +function initializes a communications channel for name service +lookups. If it returns successfully, +.B ares_init +will set the variable pointed to by +.I channel +to a handle used to identify the name service channel. The caller +should invoke +.BR ares_destroy (3) +on the handle when the channel is no longer needed. +.PP +The +.B ares_init_options +function also initializes a name service channel, with additional +options useful for applications requiring more control over name +service configuration. The +.I optmask +parameter specifies which fields in the structure pointed to by +.I options +are set, as follows: +.PP +.TP 18 +.B ARES_OPT_FLAGS +.B int \fIflags\fP; +.br +Flags controlling the behavior of the resolver. See below for a +description of possible flag values. +.TP 18 +.B ARES_OPT_TIMEOUT +.B int \fItimeout\fP; +.br +The number of seconds each name server is given to respond to a query +on the first try. (After the first try, the timeout algorithm becomes +more complicated, but scales linearly with the value of +\fItimeout\fP.) The default is five seconds. +.TP 18 +.B ARES_OPT_TRIES +.B int \fItries\fP; +.br +The number of tries the resolver will try contacting each name server +before giving up. The default is four tries. +.TP 18 +.B ARES_OPT_NDOTS +.B int \fIndots\fP; +.br +The number of dots which must be present in a domain name for it to be +queried for "as is" prior to querying for it with the default domain +extensions appended. The default value is 1 unless set otherwise by +resolv.conf or the RES_OPTIONS environment variable. +.TP 18 +.B ARES_OPT_PORT +.B unsigned short \fIport\fP; +.br +The port to use for queries (both TCP and UDP), in network byte order. +The default value is 53 (in network byte order), the standard name +service port. +.TP 18 +.B ARES_OPT_SERVERS +.B struct in_addr *\fIservers\fP; +.br +.B int \fInservers\fP; +.br +The list of servers to contact, instead of the servers specified in +resolv.conf or the local named. +.TP 18 +.B ARES_OPT_DOMAINS +.B char **\fIdomains\fP; +.br +.B int \fIndomains\fP; +.br +The domains to search, instead of the domains specified in resolv.conf +or the domain derived from the kernel hostname variable. +.TP 18 +.B ARES_OPT_LOOKUPS +.B char *\fIlookups\fP; +.br +The lookups to perform for host queries. +.I lookups +should be set to a string of the characters "b" or "f", where "b" +indicates a DNS lookup and "f" indicates a lookup in the hosts file. +.PP +The +.I flags +field should be the bitwise or of some subset of the following values: +.TP 23 +.B ARES_FLAG_USEVC +Always use TCP queries (the "virtual circuit") instead of UDP +queries. Normally, TCP is only used if a UDP query yields a truncated +result. +.TP 23 +.B ARES_FLAG_PRIMARY +Only query the first server in the list of servers to query. +.TP 23 +.B ARES_FLAG_IGNTC +If a truncated response to a UDP query is received, do not fall back +to TCP; simply continue on with the truncated response. +.TP 23 +.B ARES_FLAG_NORECURSE +Do not set the "recursion desired" bit on outgoing queries, so that +the name server being contacted will not try to fetch the answer from +other servers if it doesn't know the answer locally. +.TP 23 +.B ARES_FLAG_STAYOPEN +Do not close communciations sockets when the number of active queries +drops to zero. +.TP 23 +.B ARES_FLAG_NOSEARCH +Do not use the default search domains; only query hostnames as-is or +as aliases. +.TP 23 +.B ARES_FLAG_NOALIASES +Do not honor the HOSTALIASES environment variable, which normally +specifies a file of hostname translations. +.TP 23 +.B ARES_FLAG_NOCHECKRESP +Do not discard responses with the SERVFAIL, NOTIMP, or REFUSED +response code or responses whose questions don't match the questions +in the request. Primarily useful for writing clients which might be +used to test or debug name servers. +.SH RETURN VALUES +.I ares_init +or +.I ares_init_options +can return any of the following values: +.TP 14 +.B ARES_SUCCESS +Initialization succeeded. +.TP 14 +.B ARES_EFILE +A configuration file could not be read. +.TP 14 +.B ARES_ENOMEM +The process's available memory was exhausted. +.SH SEE ALSO +.BR ares_destroy (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_init.c b/libares/ares_init.c new file mode 100644 index 0000000..06ea68a --- /dev/null +++ b/libares/ares_init.c @@ -0,0 +1,581 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_init.c,v 1.7 1999/10/23 19:28:13 danw Exp $"; + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "ares.h" +#include "ares_private.h" + +static int init_by_options(ares_channel channel, struct ares_options *options, + int optmask); +static int init_by_environment(ares_channel channel); +static int init_by_resolv_conf(ares_channel channel); +static int init_by_defaults(ares_channel channel); +static int config_domain(ares_channel channel, char *str); +static int config_lookup(ares_channel channel, const char *str); +static int config_nameserver(struct server_state **servers, int *nservers, + const char *str); +static int config_sortlist(struct apattern **sortlist, int *nsort, + const char *str); +static int set_search(ares_channel channel, const char *str); +static int set_options(ares_channel channel, const char *str); +static char *try_config(char *s, char *opt); +static const char *try_option(const char *p, const char *q, const char *opt); +static int ip_addr(const char *s, int len, struct in_addr *addr); +static void natural_mask(struct apattern *pat); + +int ares_init(ares_channel *channelptr) +{ + return ares_init_options(channelptr, NULL, 0); +} + +int ares_init_options(ares_channel *channelptr, struct ares_options *options, + int optmask) +{ + ares_channel channel; + int i, status; + struct server_state *server; + struct timeval tv; + + channel = malloc(sizeof(struct ares_channeldata)); + if (!channel) + return ARES_ENOMEM; + + /* Set everything to distinguished values so we know they haven't + * been set yet. + */ + channel->flags = -1; + channel->timeout = -1; + channel->tries = -1; + channel->ndots = -1; + channel->udp_port = -1; + channel->tcp_port = -1; + channel->nservers = -1; + channel->ndomains = -1; + channel->nsort = -1; + channel->lookups = NULL; + + /* Initialize configuration by each of the four sources, from highest + * precedence to lowest. + */ + status = init_by_options(channel, options, optmask); + if (status == ARES_SUCCESS) + status = init_by_environment(channel); + if (status == ARES_SUCCESS) + status = init_by_resolv_conf(channel); + if (status == ARES_SUCCESS) + status = init_by_defaults(channel); + if (status != ARES_SUCCESS) + { + /* Something failed; clean up memory we may have allocated. */ + if (channel->nservers != -1) + free(channel->servers); + if (channel->ndomains != -1) + { + for (i = 0; i < channel->ndomains; i++) + free(channel->domains[i]); + free(channel->domains); + } + if (channel->nsort != -1) + free(channel->sortlist); + free(channel->lookups); + free(channel); + return status; + } + + /* Trim to one server if ARES_FLAG_PRIMARY is set. */ + if ((channel->flags & ARES_FLAG_PRIMARY) && channel->nservers > 1) + channel->nservers = 1; + + /* Initialize server states. */ + for (i = 0; i < channel->nservers; i++) + { + server = &channel->servers[i]; + server->udp_socket = -1; + server->tcp_socket = -1; + server->tcp_lenbuf_pos = 0; + server->tcp_buffer = NULL; + server->qhead = NULL; + server->qtail = NULL; + } + + /* Choose a somewhat random query ID. The main point is to avoid + * collisions with stale queries. An attacker trying to spoof a DNS + * answer also has to guess the query ID, but it's only a 16-bit + * field, so there's not much to be done about that. + */ + gettimeofday(&tv, NULL); + channel->next_id = (tv.tv_sec ^ tv.tv_usec ^ getpid()) & 0xffff; + + channel->queries = NULL; + + *channelptr = channel; + return ARES_SUCCESS; +} + +static int init_by_options(ares_channel channel, struct ares_options *options, + int optmask) +{ + int i; + + /* Easy stuff. */ + if ((optmask & ARES_OPT_FLAGS) && channel->flags == -1) + channel->flags = options->flags; + if ((optmask & ARES_OPT_TIMEOUT) && channel->timeout == -1) + channel->timeout = options->timeout; + if ((optmask & ARES_OPT_TRIES) && channel->tries == -1) + channel->tries = options->tries; + if ((optmask & ARES_OPT_NDOTS) && channel->ndots == -1) + channel->ndots = options->ndots; + if ((optmask & ARES_OPT_UDP_PORT) && channel->udp_port == -1) + channel->udp_port = options->udp_port; + if ((optmask & ARES_OPT_TCP_PORT) && channel->tcp_port == -1) + channel->tcp_port = options->tcp_port; + + /* Copy the servers, if given. */ + if ((optmask & ARES_OPT_SERVERS) && channel->nservers == -1) + { + channel->servers = + malloc(options->nservers * sizeof(struct server_state)); + if (!channel->servers && options->nservers != 0) + return ARES_ENOMEM; + for (i = 0; i < options->nservers; i++) + channel->servers[i].addr = options->servers[i]; + channel->nservers = options->nservers; + } + + /* Copy the domains, if given. Keep channel->ndomains consistent so + * we can clean up in case of error. + */ + if ((optmask & ARES_OPT_DOMAINS) && channel->ndomains == -1) + { + channel->domains = malloc(options->ndomains * sizeof(char *)); + if (!channel->domains && options->ndomains != 0) + return ARES_ENOMEM; + for (i = 0; i < options->ndomains; i++) + { + channel->ndomains = i; + channel->domains[i] = strdup(options->domains[i]); + if (!channel->domains[i]) + return ARES_ENOMEM; + } + channel->ndomains = options->ndomains; + } + + /* Set lookups, if given. */ + if ((optmask & ARES_OPT_LOOKUPS) && !channel->lookups) + { + channel->lookups = strdup(options->lookups); + if (!channel->lookups) + return ARES_ENOMEM; + } + + return ARES_SUCCESS; +} + +static int init_by_environment(ares_channel channel) +{ + const char *localdomain, *res_options; + int status; + + localdomain = getenv("LOCALDOMAIN"); + if (localdomain && channel->ndomains == -1) + { + status = set_search(channel, localdomain); + if (status != ARES_SUCCESS) + return status; + } + + res_options = getenv("RES_OPTIONS"); + if (res_options) + { + status = set_options(channel, res_options); + if (status != ARES_SUCCESS) + return status; + } + + return ARES_SUCCESS; +} + +static int init_by_resolv_conf(ares_channel channel) +{ + FILE *fp; + char *line = NULL, *p; + int linesize, status, nservers = 0, nsort = 0; + struct server_state *servers = NULL; + struct apattern *sortlist = NULL; + + fp = fopen(PATH_RESOLV_CONF, "r"); + if (!fp) + return (errno == ENOENT) ? ARES_SUCCESS : ARES_EFILE; + while ((status = ares__read_line(fp, &line, &linesize)) == ARES_SUCCESS) + { + if ((p = try_config(line, "domain")) && channel->ndomains == -1) + status = config_domain(channel, p); + else if ((p = try_config(line, "lookup")) && !channel->lookups) + status = config_lookup(channel, p); + else if ((p = try_config(line, "search")) && channel->ndomains == -1) + status = set_search(channel, p); + else if ((p = try_config(line, "nameserver")) && channel->nservers == -1) + status = config_nameserver(&servers, &nservers, p); + else if ((p = try_config(line, "sortlist")) && channel->nsort == -1) + status = config_sortlist(&sortlist, &nsort, p); + else if ((p = try_config(line, "options"))) + status = set_options(channel, p); + else + status = ARES_SUCCESS; + if (status != ARES_SUCCESS) + break; + } + free(line); + fclose(fp); + + /* Handle errors. */ + if (status != ARES_EOF) + { + free(servers); + free(sortlist); + return status; + } + + /* If we got any name server entries, fill them in. */ + if (servers) + { + channel->servers = servers; + channel->nservers = nservers; + } + + /* If we got any sortlist entries, fill them in. */ + if (sortlist) + { + channel->sortlist = sortlist; + channel->nsort = nsort; + } + + return ARES_SUCCESS; +} + +static int init_by_defaults(ares_channel channel) +{ + char hostname[MAXHOSTNAMELEN + 1]; + + if (channel->flags == -1) + channel->flags = 0; + if (channel->timeout == -1) + channel->timeout = DEFAULT_TIMEOUT; + if (channel->tries == -1) + channel->tries = DEFAULT_TRIES; + if (channel->ndots == -1) + channel->ndots = 1; + if (channel->udp_port == -1) + channel->udp_port = htons(NAMESERVER_PORT); + if (channel->tcp_port == -1) + channel->tcp_port = htons(NAMESERVER_PORT); + + if (channel->nservers == -1) + { + /* If nobody specified servers, try a local named. */ + channel->servers = malloc(sizeof(struct server_state)); + if (!channel->servers) + return ARES_ENOMEM; + channel->servers[0].addr.s_addr = htonl(INADDR_LOOPBACK); + channel->nservers = 1; + } + + if (channel->ndomains == -1) + { + /* Derive a default domain search list from the kernel hostname, + * or set it to empty if the hostname isn't helpful. + */ + if (gethostname(hostname, sizeof(hostname)) == -1 + || !strchr(hostname, '.')) + { + channel->domains = malloc(0); + channel->ndomains = 0; + } + else + { + channel->domains = malloc(sizeof(char *)); + if (!channel->domains) + return ARES_ENOMEM; + channel->ndomains = 0; + channel->domains[0] = strdup(strchr(hostname, '.') + 1); + if (!channel->domains[0]) + return ARES_ENOMEM; + channel->ndomains = 1; + } + } + + if (channel->nsort == -1) + { + channel->sortlist = NULL; + channel->nsort = 0; + } + + if (!channel->lookups) + { + channel->lookups = strdup("bf"); + if (!channel->lookups) + return ARES_ENOMEM; + } + + return ARES_SUCCESS; +} + +static int config_domain(ares_channel channel, char *str) +{ + char *q; + + /* Set a single search domain. */ + q = str; + while (*q && !isspace((unsigned char)*q)) + q++; + *q = 0; + return set_search(channel, str); +} + +static int config_lookup(ares_channel channel, const char *str) +{ + char lookups[3], *l; + const char *p; + + /* Set the lookup order. Only the first letter of each work + * is relevant, and it has to be "b" for DNS or "f" for the + * host file. Ignore everything else. + */ + l = lookups; + p = str; + while (*p) + { + if ((*p == 'b' || *p == 'f') && l < lookups + 2) + *l++ = *p; + while (*p && !isspace((unsigned char)*p)) + p++; + while (isspace((unsigned char)*p)) + p++; + } + *l = 0; + channel->lookups = strdup(lookups); + return (channel->lookups) ? ARES_SUCCESS : ARES_ENOMEM; +} + +static int config_nameserver(struct server_state **servers, int *nservers, + const char *str) +{ + struct in_addr addr; + struct server_state *newserv; + + /* Add a nameserver entry, if this is a valid address. */ + addr.s_addr = inet_addr(str); + if (addr.s_addr == INADDR_NONE) + return ARES_SUCCESS; + newserv = realloc(*servers, (*nservers + 1) * sizeof(struct server_state)); + if (!newserv) + return ARES_ENOMEM; + newserv[*nservers].addr = addr; + *servers = newserv; + (*nservers)++; + return ARES_SUCCESS; +} + +static int config_sortlist(struct apattern **sortlist, int *nsort, + const char *str) +{ + struct apattern pat, *newsort; + const char *q; + + /* Add sortlist entries. */ + while (*str && *str != ';') + { + q = str; + while (*q && *q != '/' && *q != ';' && !isspace((unsigned char)*q)) + q++; + if (ip_addr(str, q - str, &pat.addr) == 0) + { + /* We have a pattern address; now determine the mask. */ + if (*q == '/') + { + str = q + 1; + while (*q && *q != ';' && !isspace((unsigned char)*q)) + q++; + if (ip_addr(str, q - str, &pat.mask) != 0) + natural_mask(&pat); + } + else + natural_mask(&pat); + + /* Add this pattern to our list. */ + newsort = realloc(*sortlist, (*nsort + 1) * sizeof(struct apattern)); + if (!newsort) + return ARES_ENOMEM; + newsort[*nsort] = pat; + *sortlist = newsort; + (*nsort)++; + } + else + { + while (*q && *q != ';' && !isspace((unsigned char)*q)) + q++; + } + str = q; + while (isspace((unsigned char)*str)) + str++; + } + + return ARES_SUCCESS; +} + +static int set_search(ares_channel channel, const char *str) +{ + int n; + const char *p, *q; + + /* Count the domains given. */ + n = 0; + p = str; + while (*p) + { + while (*p && !isspace((unsigned char)*p)) + p++; + while (isspace((unsigned char)*p)) + p++; + n++; + } + + channel->domains = malloc(n * sizeof(char *)); + if (!channel->domains && n) + return ARES_ENOMEM; + + /* Now copy the domains. */ + n = 0; + p = str; + while (*p) + { + channel->ndomains = n; + q = p; + while (*q && !isspace((unsigned char)*q)) + q++; + channel->domains[n] = malloc(q - p + 1); + if (!channel->domains[n]) + return ARES_ENOMEM; + memcpy(channel->domains[n], p, q - p); + channel->domains[n][q - p] = 0; + p = q; + while (isspace((unsigned char)*p)) + p++; + n++; + } + channel->ndomains = n; + + return ARES_SUCCESS; +} + +static int set_options(ares_channel channel, const char *str) +{ + const char *p, *q, *val; + + p = str; + while (*p) + { + q = p; + while (*q && !isspace((unsigned char)*q)) + q++; + val = try_option(p, q, "ndots:"); + if (val && channel->ndots == -1) + channel->ndots = atoi(val); + val = try_option(p, q, "retrans:"); + if (val && channel->timeout == -1) + channel->timeout = atoi(val); + val = try_option(p, q, "retry:"); + if (val && channel->tries == -1) + channel->tries = atoi(val); + p = q; + while (isspace((unsigned char)*p)) + p++; + } + + return ARES_SUCCESS; +} + +static char *try_config(char *s, char *opt) +{ + int len; + + len = strlen(opt); + if (strncmp(s, opt, len) != 0 || !isspace((unsigned char)s[len])) + return NULL; + s += len; + while (isspace((unsigned char)*s)) + s++; + return s; +} + +static const char *try_option(const char *p, const char *q, const char *opt) +{ + int len; + + len = strlen(opt); + return (q - p > len && strncmp(p, opt, len) == 0) ? p + len : NULL; +} + +static int ip_addr(const char *s, int len, struct in_addr *addr) +{ + char ipbuf[16]; + + /* Four octets and three periods yields at most 15 characters. */ + if (len > 15) + return -1; + memcpy(ipbuf, s, len); + ipbuf[len] = 0; + + addr->s_addr = inet_addr(ipbuf); + if (addr->s_addr == INADDR_NONE && strcmp(ipbuf, "255.255.255.255") != 0) + return -1; + return 0; +} + +static void natural_mask(struct apattern *pat) +{ + struct in_addr addr; + + /* Store a host-byte-order copy of pat in a struct in_addr. Icky, + * but portable. + */ + addr.s_addr = ntohl(pat->addr.s_addr); + + /* This is out of date in the CIDR world, but some people might + * still rely on it. + */ + if (IN_CLASSA(addr.s_addr)) + pat->mask.s_addr = htonl(IN_CLASSA_NET); + else if (IN_CLASSB(addr.s_addr)) + pat->mask.s_addr = htonl(IN_CLASSB_NET); + else + pat->mask.s_addr = htonl(IN_CLASSC_NET); +} diff --git a/libares/ares_init_options.3 b/libares/ares_init_options.3 new file mode 100644 index 0000000..46bf8e4 --- /dev/null +++ b/libares/ares_init_options.3 @@ -0,0 +1,2 @@ +.so man3/ares_init.3 +.\" $Id: ares_init_options.3,v 1.1 1998/08/13 18:07:32 ghudson Exp $ diff --git a/libares/ares_mkquery.3 b/libares/ares_mkquery.3 new file mode 100644 index 0000000..3481525 --- /dev/null +++ b/libares/ares_mkquery.3 @@ -0,0 +1,76 @@ +.\" $Id: ares_mkquery.3,v 1.2 2000/01/05 16:29:43 ghudson Exp $ +.\" +.\" Copyright 1998, 2000 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_MKQUERY 3 "4 January 2000" +.SH NAME +ares_mkquery \- Compose a single-question DNS query buffer +.SH SYNOPSIS +.nf +.B #include +.PP +.B +int ares_mkquery(const char *\fIname\fP, int \fIclass\fP, int \fItype\fP, +.B + unsigned short \fIid\fP, char **\fIbuf\fP, int *\fIbuflen\fP) +.fi +.SH DESCRIPTION +The +.B ares_mkquery +function composes a DNS query with a single question. +The parameter +.I name +gives the query name as a NUL-terminated C string of period-separated +labels optionally ending with a period; periods and backslashes within +a label must be escaped with a backlash. The parameters +.I class +and +.I type +give the class and type of the query using the values defined in +.BR . +The parameter +.I id +gives a 16-bit identifier for the query. The query will be placed in +an allocated buffer, a pointer to which will be stored in the variable +pointed to by +.IR buf , +and the length of which will be stored in the variable pointed to by +.IR buflen . +It is the caller's responsibility to free this buffer using +.B ares_free_string +when it is no longer needed. +.SH RETURN VALUES +.B ares_expand_name +can return any of the following values: +.TP 15 +.B ARES_SUCCESS +Construction of the DNS query succeeded. +.TP 15 +.B ARES_EBADNAME +The query name +.I name +could not be encoded as a domain name, either because it contained a +zero-length label or because it contained a label of more than 63 +characters. +.TP 15 +.B ARES_ENOMEM +Memory was exhausted. +.SH SEE ALSO +.BR ares_expand_name (3), +.BR ares_free_string (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998, 2000 by the Massachusetts Institute of Technology. diff --git a/libares/ares_mkquery.c b/libares/ares_mkquery.c new file mode 100644 index 0000000..490d7af --- /dev/null +++ b/libares/ares_mkquery.c @@ -0,0 +1,155 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_mkquery.c,v 1.2 1999/10/23 19:28:14 danw Exp $"; + +#include +#include +#include +#include +#include +#include "ares.h" +#include "ares_dns.h" + +/* Header format, from RFC 1035: + * 1 1 1 1 1 1 + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 + * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + * | ID | + * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + * |QR| Opcode |AA|TC|RD|RA| Z | RCODE | + * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + * | QDCOUNT | + * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + * | ANCOUNT | + * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + * | NSCOUNT | + * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + * | ARCOUNT | + * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + * + * AA, TC, RA, and RCODE are only set in responses. Brief description + * of the remaining fields: + * ID Identifier to match responses with queries + * QR Query (0) or response (1) + * Opcode For our purposes, always QUERY + * RD Recursion desired + * Z Reserved (zero) + * QDCOUNT Number of queries + * ANCOUNT Number of answers + * NSCOUNT Number of name server records + * ARCOUNT Number of additional records + * + * Question format, from RFC 1035: + * 1 1 1 1 1 1 + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 + * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + * | | + * / QNAME / + * / / + * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + * | QTYPE | + * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + * | QCLASS | + * +--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+--+ + * + * The query name is encoded as a series of labels, each represented + * as a one-byte length (maximum 63) followed by the text of the + * label. The list is terminated by a label of length zero (which can + * be thought of as the root domain). + */ + +int ares_mkquery(const char *name, int class, int type, unsigned short id, + int rd, unsigned char **buf, int *buflen) +{ + int len; + unsigned char *q; + const char *p; + + /* Compute the length of the encoded name so we can check buflen. + * Start counting at 1 for the zero-length label at the end. */ + len = 1; + for (p = name; *p; p++) + { + if (*p == '\\' && *(p + 1) != 0) + p++; + len++; + } + /* If there are n periods in the name, there are n + 1 labels, and + * thus n + 1 length fields, unless the name is empty or ends with a + * period. So add 1 unless name is empty or ends with a period. + */ + if (*name && *(p - 1) != '.') + len++; + + *buflen = len + HFIXEDSZ + QFIXEDSZ; + *buf = malloc(*buflen); + if (!*buf) + return ARES_ENOMEM; + + /* Set up the header. */ + q = *buf; + memset(q, 0, HFIXEDSZ); + DNS_HEADER_SET_QID(q, id); + DNS_HEADER_SET_OPCODE(q, QUERY); + DNS_HEADER_SET_RD(q, (rd) ? 1 : 0); + DNS_HEADER_SET_QDCOUNT(q, 1); + + /* A name of "." is a screw case for the loop below, so adjust it. */ + if (strcmp(name, ".") == 0) + name++; + + /* Start writing out the name after the header. */ + q += HFIXEDSZ; + while (*name) + { + if (*name == '.') + return ARES_EBADNAME; + + /* Count the number of bytes in this label. */ + len = 0; + for (p = name; *p && *p != '.'; p++) + { + if (*p == '\\' && *(p + 1) != 0) + p++; + len++; + } + if (len > MAXLABEL) + return ARES_EBADNAME; + + /* Encode the length and copy the data. */ + *q++ = len; + for (p = name; *p && *p != '.'; p++) + { + if (*p == '\\' && *(p + 1) != 0) + p++; + *q++ = *p; + } + + /* Go to the next label and repeat, unless we hit the end. */ + if (!*p) + break; + name = p + 1; + } + + /* Add the zero-length label at the end. */ + *q++ = 0; + + /* Finish off the question with the type and class. */ + DNS_QUESTION_SET_TYPE(q, type); + DNS_QUESTION_SET_CLASS(q, class); + + return ARES_SUCCESS; +} diff --git a/libares/ares_parse_a_reply.3 b/libares/ares_parse_a_reply.3 new file mode 100644 index 0000000..7d395dd --- /dev/null +++ b/libares/ares_parse_a_reply.3 @@ -0,0 +1,65 @@ +.\" $Id: ares_parse_a_reply.3,v 1.1 1998/08/13 18:07:33 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_PARSE_A_REPLY 3 "25 July 1998" +.SH NAME +ares_parse_a_reply \- Parse a reply to a DNS query of type A into a hostent +.SH SYNOPSIS +.nf +.B #include +.PP +.B +int ares_parse_a_reply(const unsigned char *\fIabuf\fB, int \fIalen\fB, +.B struct hostent **\fIhost\fB); +.fi +.SH DESCRIPTION +The +.B ares_parse_a_reply +function parses the response to a query of type A into a +.BR "struct hostent" . +The parameters +.I abuf +and +.I alen +give the contents of the response. The result is stored in allocated +memory and a pointer to it stored into the variable pointed to by +.IR host . +It is the caller's responsibility to free the resulting host structure +using +.BR ares_free_hostent (3) +when it is no longer needed. +.SH RETURN VALUES +.B ares_parse_a_reply +can return any of the following values: +.TP 15 +.B ARES_SUCCESS +The response was successfully parsed. +.TP 15 +.B ARES_EBADRESP +The response was malformatted. +.TP 15 +.B ARES_ENODATA +The response did not contain an answer to the query. +.TP 15 +.B ARES_ENOMEM +Memory was exhausted. +.SH SEE ALSO +.BR ares_gethostbyname (3), +.BR ares_free_hostent (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_parse_a_reply.c b/libares/ares_parse_a_reply.c new file mode 100644 index 0000000..fabf50c --- /dev/null +++ b/libares/ares_parse_a_reply.c @@ -0,0 +1,167 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_parse_a_reply.c,v 1.2 1998/08/17 21:45:51 ghudson Exp $"; + +#include +#include +#include +#include +#include +#include +#include +#include +#include "ares.h" +#include "ares_dns.h" +#include "ares_private.h" + +int ares_parse_a_reply(const unsigned char *abuf, int alen, + struct hostent **host) +{ + unsigned int qdcount, ancount; + int status, i, len, rr_type, rr_class, rr_len, naddrs; + int naliases; + const unsigned char *aptr; + char *hostname, *rr_name, *rr_data, **aliases; + struct in_addr *addrs; + struct hostent *hostent; + + /* Set *host to NULL for all failure cases. */ + *host = NULL; + + /* Give up if abuf doesn't have room for a header. */ + if (alen < HFIXEDSZ) + return ARES_EBADRESP; + + /* Fetch the question and answer count from the header. */ + qdcount = DNS_HEADER_QDCOUNT(abuf); + ancount = DNS_HEADER_ANCOUNT(abuf); + if (qdcount != 1) + return ARES_EBADRESP; + + /* Expand the name from the question, and skip past the question. */ + aptr = abuf + HFIXEDSZ; + status = ares_expand_name(aptr, abuf, alen, &hostname, &len); + if (status != ARES_SUCCESS) + return status; + if (aptr + len + QFIXEDSZ > abuf + alen) + { + free(hostname); + return ARES_EBADRESP; + } + aptr += len + QFIXEDSZ; + + /* Allocate addresses and aliases; ancount gives an upper bound for both. */ + addrs = malloc(ancount * sizeof(struct in_addr)); + if (!addrs) + { + free(hostname); + return ARES_ENOMEM; + } + aliases = malloc((ancount + 1) * sizeof(char *)); + if (!aliases) + { + free(hostname); + free(addrs); + return ARES_ENOMEM; + } + naddrs = 0; + naliases = 0; + + /* Examine each answer resource record (RR) in turn. */ + for (i = 0; i < ancount; i++) + { + /* Decode the RR up to the data field. */ + status = ares_expand_name(aptr, abuf, alen, &rr_name, &len); + if (status != ARES_SUCCESS) + break; + aptr += len; + if (aptr + RRFIXEDSZ > abuf + alen) + { + status = ARES_EBADRESP; + break; + } + rr_type = DNS_RR_TYPE(aptr); + rr_class = DNS_RR_CLASS(aptr); + rr_len = DNS_RR_LEN(aptr); + aptr += RRFIXEDSZ; + + if (rr_class == C_IN && rr_type == T_A + && rr_len == sizeof(struct in_addr) + && strcasecmp(rr_name, hostname) == 0) + { + memcpy(&addrs[naddrs], aptr, sizeof(struct in_addr)); + naddrs++; + status = ARES_SUCCESS; + } + + if (rr_class == C_IN && rr_type == T_CNAME) + { + /* Record the RR name as an alias. */ + aliases[naliases] = rr_name; + naliases++; + + /* Decode the RR data and replace the hostname with it. */ + status = ares_expand_name(aptr, abuf, alen, &rr_data, &len); + if (status != ARES_SUCCESS) + break; + free(hostname); + hostname = rr_data; + } + else + free(rr_name); + + aptr += rr_len; + if (aptr > abuf + alen) + { + status = ARES_EBADRESP; + break; + } + } + + if (status == ARES_SUCCESS && naddrs == 0) + status = ARES_ENODATA; + if (status == ARES_SUCCESS) + { + /* We got our answer. Allocate memory to build the host entry. */ + aliases[naliases] = NULL; + hostent = malloc(sizeof(struct hostent)); + if (hostent) + { + hostent->h_addr_list = malloc((naddrs + 1) * sizeof(char *)); + if (hostent->h_addr_list) + { + /* Fill in the hostent and return successfully. */ + hostent->h_name = hostname; + hostent->h_aliases = aliases; + hostent->h_addrtype = AF_INET; + hostent->h_length = sizeof(struct in_addr); + for (i = 0; i < naddrs; i++) + hostent->h_addr_list[i] = (char *) &addrs[i]; + hostent->h_addr_list[naddrs] = NULL; + *host = hostent; + return ARES_SUCCESS; + } + free(hostent); + } + status = ARES_ENOMEM; + } + for (i = 0; i < naliases; i++) + free(aliases[i]); + free(aliases); + free(addrs); + free(hostname); + return status; +} diff --git a/libares/ares_parse_ptr_reply.3 b/libares/ares_parse_ptr_reply.3 new file mode 100644 index 0000000..86670db --- /dev/null +++ b/libares/ares_parse_ptr_reply.3 @@ -0,0 +1,77 @@ +.\" $Id: ares_parse_ptr_reply.3,v 1.1 1998/08/13 18:07:33 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_PARSE_PTR_REPLY 3 "25 July 1998" +.SH NAME +ares_parse_ptr_reply \- Parse a reply to a DNS query of type PTR into a hostent +.SH SYNOPSIS +.nf +.B #include +.PP +.B +int ares_parse_ptr_reply(const unsigned char *\fIabuf\fB, int \fIalen\fB, +.B + const void *\fIaddr\fP, int \fIaddrlen\fP, int \fIfamily\fP, +.B struct hostent **\fIhost\fB); +.fi +.SH DESCRIPTION +The +.B ares_parse_ptr_reply +function parses the response to a query of type PTR into a +.BR "struct hostent" . +The parameters +.I abuf +and +.I alen +give the contents of the response. The parameters +.IR addr , +.IR addrlen , +and +.I family +specify which address was queried for; they are not used to verify the +response, merely used to fill in the address of the +.BR "struct hostent" . +The resulting +.B struct hostent +is stored in allocated memory and a pointer to it stored into the +variable pointed to by +.IR host . +It is the caller's responsibility to free the resulting host structure +using +.BR ares_free_hostent (3) +when it is no longer needed. +.SH RETURN VALUES +.B ares_parse_ptr_reply +can return any of the following values: +.TP 15 +.B ARES_SUCCESS +The response was successfully parsed. +.TP 15 +.B ARES_EBADRESP +The response was malformatted. +.TP 15 +.B ARES_ENODATA +The response did not contain an answer to the query. +.TP 15 +.B ARES_ENOMEM +Memory was exhausted. +.SH SEE ALSO +.BR ares_gethostbyaddr (3), +.BR ares_free_hostent (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_parse_ptr_reply.c b/libares/ares_parse_ptr_reply.c new file mode 100644 index 0000000..845102e --- /dev/null +++ b/libares/ares_parse_ptr_reply.c @@ -0,0 +1,153 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_parse_ptr_reply.c,v 1.3 1999/10/23 19:28:14 danw Exp $"; + +#include +#include +#include +#include +#include +#include +#include +#include "ares.h" +#include "ares_dns.h" +#include "ares_private.h" + +int ares_parse_ptr_reply(const unsigned char *abuf, int alen, const void *addr, + int addrlen, int family, struct hostent **host) +{ + unsigned int qdcount, ancount; + int status, i, len, rr_type, rr_class, rr_len; + const unsigned char *aptr; + char *ptrname, *hostname, *rr_name, *rr_data; + struct hostent *hostent; + + /* Set *host to NULL for all failure cases. */ + *host = NULL; + + /* Give up if abuf doesn't have room for a header. */ + if (alen < HFIXEDSZ) + return ARES_EBADRESP; + + /* Fetch the question and answer count from the header. */ + qdcount = DNS_HEADER_QDCOUNT(abuf); + ancount = DNS_HEADER_ANCOUNT(abuf); + if (qdcount != 1) + return ARES_EBADRESP; + + /* Expand the name from the question, and skip past the question. */ + aptr = abuf + HFIXEDSZ; + status = ares_expand_name(aptr, abuf, alen, &ptrname, &len); + if (status != ARES_SUCCESS) + return status; + if (aptr + len + QFIXEDSZ > abuf + alen) + { + free(ptrname); + return ARES_EBADRESP; + } + aptr += len + QFIXEDSZ; + + /* Examine each answer resource record (RR) in turn. */ + hostname = NULL; + for (i = 0; i < ancount; i++) + { + /* Decode the RR up to the data field. */ + status = ares_expand_name(aptr, abuf, alen, &rr_name, &len); + if (status != ARES_SUCCESS) + break; + aptr += len; + if (aptr + RRFIXEDSZ > abuf + alen) + { + status = ARES_EBADRESP; + break; + } + rr_type = DNS_RR_TYPE(aptr); + rr_class = DNS_RR_CLASS(aptr); + rr_len = DNS_RR_LEN(aptr); + aptr += RRFIXEDSZ; + + if (rr_class == C_IN && rr_type == T_PTR + && strcasecmp(rr_name, ptrname) == 0) + { + /* Decode the RR data and set hostname to it. */ + status = ares_expand_name(aptr, abuf, alen, &rr_data, &len); + if (status != ARES_SUCCESS) + break; + if (hostname) + free(hostname); + hostname = rr_data; + } + + if (rr_class == C_IN && rr_type == T_CNAME) + { + /* Decode the RR data and replace ptrname with it. */ + status = ares_expand_name(aptr, abuf, alen, &rr_data, &len); + if (status != ARES_SUCCESS) + break; + free(ptrname); + ptrname = rr_data; + } + + free(rr_name); + aptr += rr_len; + if (aptr > abuf + alen) + { + status = ARES_EBADRESP; + break; + } + } + + if (status == ARES_SUCCESS && !hostname) + status = ARES_ENODATA; + if (status == ARES_SUCCESS) + { + /* We got our answer. Allocate memory to build the host entry. */ + hostent = malloc(sizeof(struct hostent)); + if (hostent) + { + hostent->h_addr_list = malloc(2 * sizeof(char *)); + if (hostent->h_addr_list) + { + hostent->h_addr_list[0] = malloc(addrlen); + if (hostent->h_addr_list[0]) + { + hostent->h_aliases = malloc(sizeof (char *)); + if (hostent->h_aliases) + { + /* Fill in the hostent and return successfully. */ + hostent->h_name = hostname; + hostent->h_aliases[0] = NULL; + hostent->h_addrtype = family; + hostent->h_length = addrlen; + memcpy(hostent->h_addr_list[0], addr, addrlen); + hostent->h_addr_list[1] = NULL; + *host = hostent; + free(ptrname); + return ARES_SUCCESS; + } + free(hostent->h_addr_list[0]); + } + free(hostent->h_addr_list); + } + free(hostent); + } + status = ARES_ENOMEM; + } + if (hostname) + free(hostname); + free(ptrname); + return status; +} diff --git a/libares/ares_private.h b/libares/ares_private.h new file mode 100644 index 0000000..b8f9c1b --- /dev/null +++ b/libares/ares_private.h @@ -0,0 +1,123 @@ +/* $Id: ares_private.h,v 1.3 1998/09/22 01:46:11 ghudson Exp $ */ + +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +#include +#include +#include + +#define DEFAULT_TIMEOUT 5 +#define DEFAULT_TRIES 4 +#ifndef INADDR_NONE +#define INADDR_NONE 0xffffffff +#endif + +#define PATH_RESOLV_CONF "/etc/resolv.conf" +#ifdef ETC_INET +#define PATH_HOSTS "/etc/inet/hosts" +#else +#define PATH_HOSTS "/etc/hosts" +#endif + +struct send_request { + /* Remaining data to send */ + const char *data; + int len; + + /* Next request in queue */ + struct send_request *next; +}; + +struct server_state { + struct in_addr addr; + int udp_socket; + int tcp_socket; + + /* Mini-buffer for reading the length word */ + unsigned char tcp_lenbuf[2]; + int tcp_lenbuf_pos; + int tcp_length; + + /* Buffer for reading actual TCP data */ + unsigned char *tcp_buffer; + int tcp_buffer_pos; + + /* TCP output queue */ + struct send_request *qhead; + struct send_request *qtail; +}; + +struct query { + /* Query ID from qbuf, for faster lookup, and current timeout */ + unsigned short qid; + time_t timeout; + + /* Query buf with length at beginning, for TCP transmission */ + char *tcpbuf; + int tcplen; + + /* Arguments passed to ares_send() (qbuf points into tcpbuf) */ + const char *qbuf; + int qlen; + ares_callback callback; + void *arg; + + /* Query status */ + int try; + int server; + int *skip_server; + int using_tcp; + int error_status; + + /* Next query in chain */ + struct query *next; +}; + +/* An IP address pattern; matches an IP address X if X & mask == addr */ +struct apattern { + struct in_addr addr; + struct in_addr mask; +}; + +struct ares_channeldata { + /* Configuration data */ + int flags; + int timeout; + int tries; + int ndots; + int udp_port; + int tcp_port; + char **domains; + int ndomains; + struct apattern *sortlist; + int nsort; + char *lookups; + + /* Server addresses and communications state */ + struct server_state *servers; + int nservers; + + /* ID to use for next query */ + unsigned short next_id; + + /* Active queries */ + struct query *queries; +}; + +void ares__send_query(ares_channel channel, struct query *query, time_t now); +void ares__close_sockets(struct server_state *server); +int ares__get_hostent(FILE *fp, struct hostent **host); +int ares__read_line(FILE *fp, char **buf, int *bufsize); diff --git a/libares/ares_process.3 b/libares/ares_process.3 new file mode 100644 index 0000000..4e3ed1d --- /dev/null +++ b/libares/ares_process.3 @@ -0,0 +1,79 @@ +.\" $Id: ares_process.3,v 1.2 1998/08/20 23:21:03 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_PROCESS 3 "25 July 1998" +.SH NAME +ares_process \- Process events for name resolution +.SH SYNOPSIS +.nf +.B #include +.PP +.B void ares_process(ares_channel \fIchannel\fP, fd_set *\fIread_fds\fP, +.B fd_set *\fIwrite_fds\fP) +.fi +.SH DESCRIPTION +The +.B ares_process +function handles input/output events and timeouts associated with +queries pending on the name service channel identified by +.IR channel . +The file descriptor sets pointed to by +.I read_fds +and +.I write_fds +should have file descriptors set in them according to whether the file +descriptors specified by +.BR ares_fds (3) +are ready for reading and writing. (The easiest way to determine this +information is to invoke +.B select +with a timeout no greater than the timeout given by +.BR ares_timeout (3)). +.PP +The +.B ares_process +function will invoke callbacks for pending queries if they complete +successfully or fail. +.SS EXAMPLE +The following code fragment waits for all pending queries on a channel +to complete: +.PP +.RS +.nf +int nfds, count; +fd_set readers, writers; +struct timeval tv, *tvp; + +while (1) + { + FD_ZERO(&readers); + FD_ZERO(&writers); + nfds = ares_fds(channel, &readers, &writers); + if (nfds == 0) + break; + tvp = ares_timeout(channel, NULL, &tv); + count = select(nfds, &readers, &writers, NULL, tvp); + ares_process(channel, &readers, &writers); + } +.fi +.RE +.SH SEE ALSO +.BR ares_fds (3), +.BR ares_timeout (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_process.c b/libares/ares_process.c new file mode 100644 index 0000000..c4b18cf --- /dev/null +++ b/libares/ares_process.c @@ -0,0 +1,599 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_process.c,v 1.5 2000/02/17 18:27:27 ghudson Exp $"; + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "ares.h" +#include "ares_dns.h" +#include "ares_private.h" + +static void write_tcp_data(ares_channel channel, fd_set *write_fds, + time_t now); +static void read_tcp_data(ares_channel channel, fd_set *read_fds, time_t now); +static void read_udp_packets(ares_channel channel, fd_set *read_fds, + time_t now); +static void process_timeouts(ares_channel channel, time_t now); +static void process_answer(ares_channel channel, unsigned char *abuf, + int alen, int whichserver, int tcp, int now); +static void handle_error(ares_channel channel, int whichserver, time_t now); +static void next_server(ares_channel channel, struct query *query, time_t now); +static int open_tcp_socket(ares_channel channel, struct server_state *server); +static int open_udp_socket(ares_channel channel, struct server_state *server); +static int same_questions(const unsigned char *qbuf, int qlen, + const unsigned char *abuf, int alen); +static void end_query(ares_channel channel, struct query *query, int status, + unsigned char *abuf, int alen); + +/* Something interesting happened on the wire, or there was a timeout. + * See what's up and respond accordingly. + */ +void ares_process(ares_channel channel, fd_set *read_fds, fd_set *write_fds) +{ + time_t now; + + time(&now); + write_tcp_data(channel, write_fds, now); + read_tcp_data(channel, read_fds, now); + read_udp_packets(channel, read_fds, now); + process_timeouts(channel, now); +} + +/* If any TCP sockets select true for writing, write out queued data + * we have for them. + */ +static void write_tcp_data(ares_channel channel, fd_set *write_fds, time_t now) +{ + struct server_state *server; + struct send_request *sendreq; + struct iovec *vec; + int i, n, count; + + for (i = 0; i < channel->nservers; i++) + { + /* Make sure server has data to send and is selected in write_fds. */ + server = &channel->servers[i]; + if (!server->qhead || server->tcp_socket == -1 + || !FD_ISSET(server->tcp_socket, write_fds)) + continue; + + /* Count the number of send queue items. */ + n = 0; + for (sendreq = server->qhead; sendreq; sendreq = sendreq->next) + n++; + + /* Allocate iovecs so we can send all our data at once. */ + vec = malloc(n * sizeof(struct iovec)); + if (vec) + { + /* Fill in the iovecs and send. */ + n = 0; + for (sendreq = server->qhead; sendreq; sendreq = sendreq->next) + { + vec[n].iov_base = (char *) sendreq->data; + vec[n].iov_len = sendreq->len; + n++; + } + count = writev(server->tcp_socket, vec, n); + free(vec); + if (count < 0) + { + handle_error(channel, i, now); + continue; + } + + /* Advance the send queue by as many bytes as we sent. */ + while (count) + { + sendreq = server->qhead; + if (count >= sendreq->len) + { + count -= sendreq->len; + server->qhead = sendreq->next; + if (server->qhead == NULL) + server->qtail = NULL; + free(sendreq); + } + else + { + sendreq->data += count; + sendreq->len -= count; + break; + } + } + } + else + { + /* Can't allocate iovecs; just send the first request. */ + sendreq = server->qhead; + count = write(server->tcp_socket, sendreq->data, sendreq->len); + if (count < 0) + { + handle_error(channel, i, now); + continue; + } + + /* Advance the send queue by as many bytes as we sent. */ + if (count == sendreq->len) + { + server->qhead = sendreq->next; + if (server->qhead == NULL) + server->qtail = NULL; + free(sendreq); + } + else + { + sendreq->data += count; + sendreq->len -= count; + } + } + } +} + +/* If any TCP socket selects true for reading, read some data, + * allocate a buffer if we finish reading the length word, and process + * a packet if we finish reading one. + */ +static void read_tcp_data(ares_channel channel, fd_set *read_fds, time_t now) +{ + struct server_state *server; + int i, count; + + for (i = 0; i < channel->nservers; i++) + { + /* Make sure the server has a socket and is selected in read_fds. */ + server = &channel->servers[i]; + if (server->tcp_socket == -1 || !FD_ISSET(server->tcp_socket, read_fds)) + continue; + + if (server->tcp_lenbuf_pos != 2) + { + /* We haven't yet read a length word, so read that (or + * what's left to read of it). + */ + count = read(server->tcp_socket, + server->tcp_lenbuf + server->tcp_lenbuf_pos, + 2 - server->tcp_lenbuf_pos); + if (count <= 0) + { + handle_error(channel, i, now); + continue; + } + + server->tcp_lenbuf_pos += count; + if (server->tcp_lenbuf_pos == 2) + { + /* We finished reading the length word. Decode the + * length and allocate a buffer for the data. + */ + server->tcp_length = server->tcp_lenbuf[0] << 8 + | server->tcp_lenbuf[1]; + server->tcp_buffer = malloc(server->tcp_length); + if (!server->tcp_buffer) + handle_error(channel, i, now); + server->tcp_buffer_pos = 0; + } + } + else + { + /* Read data into the allocated buffer. */ + count = read(server->tcp_socket, + server->tcp_buffer + server->tcp_buffer_pos, + server->tcp_length - server->tcp_buffer_pos); + if (count <= 0) + { + handle_error(channel, i, now); + continue; + } + + server->tcp_buffer_pos += count; + if (server->tcp_buffer_pos == server->tcp_length) + { + /* We finished reading this answer; process it and + * prepare to read another length word. + */ + process_answer(channel, server->tcp_buffer, server->tcp_length, + i, 1, now); + free(server->tcp_buffer); + server->tcp_buffer = NULL; + server->tcp_lenbuf_pos = 0; + } + } + } +} + +/* If any UDP sockets select true for reading, process them. */ +static void read_udp_packets(ares_channel channel, fd_set *read_fds, + time_t now) +{ + struct server_state *server; + int i, count; + unsigned char buf[PACKETSZ + 1]; + + for (i = 0; i < channel->nservers; i++) + { + /* Make sure the server has a socket and is selected in read_fds. */ + server = &channel->servers[i]; + if (server->udp_socket == -1 || !FD_ISSET(server->udp_socket, read_fds)) + continue; + + count = recv(server->udp_socket, buf, sizeof(buf), 0); + if (count <= 0) + handle_error(channel, i, now); + + process_answer(channel, buf, count, i, 0, now); + } +} + +/* If any queries have timed out, note the timeout and move them on. */ +static void process_timeouts(ares_channel channel, time_t now) +{ + struct query *query, *next; + + for (query = channel->queries; query; query = next) + { + next = query->next; + if (query->timeout != 0 && now >= query->timeout) + { + query->error_status = ARES_ETIMEOUT; + next_server(channel, query, now); + } + } +} + +/* Handle an answer from a server. */ +static void process_answer(ares_channel channel, unsigned char *abuf, + int alen, int whichserver, int tcp, int now) +{ + int id, tc, rcode; + struct query *query; + + /* If there's no room in the answer for a header, we can't do much + * with it. */ + if (alen < HFIXEDSZ) + return; + + /* Grab the query ID, truncate bit, and response code from the packet. */ + id = DNS_HEADER_QID(abuf); + tc = DNS_HEADER_TC(abuf); + rcode = DNS_HEADER_RCODE(abuf); + + /* Find the query corresponding to this packet. */ + for (query = channel->queries; query; query = query->next) + { + if (query->qid == id) + break; + } + if (!query) + return; + + /* If we got a truncated UDP packet and are not ignoring truncation, + * don't accept the packet, and switch the query to TCP if we hadn't + * done so already. + */ + if ((tc || alen > PACKETSZ) && !tcp && !(channel->flags & ARES_FLAG_IGNTC)) + { + if (!query->using_tcp) + { + query->using_tcp = 1; + ares__send_query(channel, query, now); + } + return; + } + + /* Limit alen to PACKETSZ if we aren't using TCP (only relevant if we + * are ignoring truncation. + */ + if (alen > PACKETSZ && !tcp) + alen = PACKETSZ; + + /* If we aren't passing through all error packets, discard packets + * with SERVFAIL, NOTIMP, or REFUSED response codes. + */ + if (!(channel->flags & ARES_FLAG_NOCHECKRESP)) + { + if (rcode == SERVFAIL || rcode == NOTIMP || rcode == REFUSED) + { + query->skip_server[whichserver] = 1; + if (query->server == whichserver) + next_server(channel, query, now); + return; + } + if (!same_questions(query->qbuf, query->qlen, abuf, alen)) + { + if (query->server == whichserver) + next_server(channel, query, now); + return; + } + } + + end_query(channel, query, ARES_SUCCESS, abuf, alen); +} + +static void handle_error(ares_channel channel, int whichserver, time_t now) +{ + struct query *query; + + /* Reset communications with this server. */ + ares__close_sockets(&channel->servers[whichserver]); + + /* Tell all queries talking to this server to move on and not try + * this server again. + */ + for (query = channel->queries; query; query = query->next) + { + if (query->server == whichserver) + { + query->skip_server[whichserver] = 1; + next_server(channel, query, now); + } + } +} + +static void next_server(ares_channel channel, struct query *query, time_t now) +{ + /* Advance to the next server or try. */ + query->server++; + for (; query->try < channel->tries; query->try++) + { + for (; query->server < channel->nservers; query->server++) + { + if (!query->skip_server[query->server]) + { + ares__send_query(channel, query, now); + return; + } + } + query->server = 0; + + /* Only one try if we're using TCP. */ + if (query->using_tcp) + break; + } + end_query(channel, query, query->error_status, NULL, 0); +} + +void ares__send_query(ares_channel channel, struct query *query, time_t now) +{ + struct send_request *sendreq; + struct server_state *server; + + server = &channel->servers[query->server]; + if (query->using_tcp) + { + /* Make sure the TCP socket for this server is set up and queue + * a send request. + */ + if (server->tcp_socket == -1) + { + if (open_tcp_socket(channel, server) == -1) + { + query->skip_server[query->server] = 1; + next_server(channel, query, now); + } + } + sendreq = malloc(sizeof(struct send_request)); + if (!sendreq) + end_query(channel, query, ARES_ENOMEM, NULL, 0); + sendreq->data = query->tcpbuf; + sendreq->len = query->tcplen; + sendreq->next = NULL; + if (server->qtail) + server->qtail->next = sendreq; + else + server->qhead = sendreq; + server->qtail = sendreq; + query->timeout = 0; + } + else + { + if (server->udp_socket == -1) + { + if (open_udp_socket(channel, server) == -1) + { + query->skip_server[query->server] = 1; + next_server(channel, query, now); + } + } + if (send(server->udp_socket, query->qbuf, query->qlen, 0) == -1) + { + query->skip_server[query->server] = 1; + next_server(channel, query, now); + } + query->timeout = now + + ((query->try == 0) ? channel->timeout + : channel->timeout << query->try / channel->nservers); + } +} + +static int open_tcp_socket(ares_channel channel, struct server_state *server) +{ + int s, flags; + struct sockaddr_in sin; + + /* Acquire a socket. */ + s = socket(AF_INET, SOCK_STREAM, 0); + if (s == -1) + return -1; + + /* Set the socket non-blocking. */ + if (fcntl(s, F_GETFL, &flags) == -1) + { + close(s); + return -1; + } + flags &= O_NONBLOCK; + if (fcntl(s, F_SETFL, flags) == -1) + { + close(s); + return -1; + } + + /* Connect to the server. */ + memset(&sin, 0, sizeof(sin)); + sin.sin_family = AF_INET; + sin.sin_addr = server->addr; + sin.sin_port = channel->tcp_port; + if (connect(s, (struct sockaddr *) &sin, sizeof(sin)) == -1 + && errno != EINPROGRESS) + { + close(s); + return -1; + } + + server->tcp_socket = s; + return 0; +} + +static int open_udp_socket(ares_channel channel, struct server_state *server) +{ + int s; + struct sockaddr_in sin; + + /* Acquire a socket. */ + s = socket(AF_INET, SOCK_DGRAM, 0); + if (s == -1) + return -1; + + /* Connect to the server. */ + memset(&sin, 0, sizeof(sin)); + sin.sin_family = AF_INET; + sin.sin_addr = server->addr; + sin.sin_port = channel->udp_port; + if (connect(s, (struct sockaddr *) &sin, sizeof(sin)) == -1) + { + close(s); + return -1; + } + + server->udp_socket = s; + return 0; +} + +static int same_questions(const unsigned char *qbuf, int qlen, + const unsigned char *abuf, int alen) +{ + struct { + const unsigned char *p; + int qdcount; + char *name; + int namelen; + int type; + int class; + } q, a; + int i, j; + + if (qlen < HFIXEDSZ || alen < HFIXEDSZ) + return 0; + + /* Extract qdcount from the request and reply buffers and compare them. */ + q.qdcount = DNS_HEADER_QDCOUNT(qbuf); + a.qdcount = DNS_HEADER_QDCOUNT(abuf); + if (q.qdcount != a.qdcount) + return 0; + + /* For each question in qbuf, find it in abuf. */ + q.p = qbuf + HFIXEDSZ; + for (i = 0; i < q.qdcount; i++) + { + /* Decode the question in the query. */ + if (ares_expand_name(q.p, qbuf, qlen, &q.name, &q.namelen) + != ARES_SUCCESS) + return 0; + q.p += q.namelen; + if (q.p + QFIXEDSZ > qbuf + qlen) + { + free(q.name); + return 0; + } + q.type = DNS_QUESTION_TYPE(q.p); + q.class = DNS_QUESTION_CLASS(q.p); + q.p += QFIXEDSZ; + + /* Search for this question in the answer. */ + a.p = abuf + HFIXEDSZ; + for (j = 0; j < a.qdcount; j++) + { + /* Decode the question in the answer. */ + if (ares_expand_name(a.p, abuf, alen, &a.name, &a.namelen) + != ARES_SUCCESS) + { + free(q.name); + return 0; + } + a.p += a.namelen; + if (a.p + QFIXEDSZ > abuf + alen) + { + free(q.name); + free(a.name); + return 0; + } + a.type = DNS_QUESTION_TYPE(a.p); + a.class = DNS_QUESTION_CLASS(a.p); + a.p += QFIXEDSZ; + + /* Compare the decoded questions. */ + if (strcasecmp(q.name, a.name) == 0 && q.type == a.type + && q.class == a.class) + { + free(a.name); + break; + } + free(a.name); + } + + free(q.name); + if (j == a.qdcount) + return 0; + } + return 1; +} + +static void end_query(ares_channel channel, struct query *query, int status, + unsigned char *abuf, int alen) +{ + struct query **q; + int i; + + query->callback(query->arg, status, abuf, alen); + for (q = &channel->queries; *q; q = &(*q)->next) + { + if (*q == query) + break; + } + *q = query->next; + free(query->tcpbuf); + free(query->skip_server); + free(query); + + /* Simple cleanup policy: if no queries are remaining, close all + * network sockets unless STAYOPEN is set. + */ + if (!channel->queries && !(channel->flags & ARES_FLAG_STAYOPEN)) + { + for (i = 0; i < channel->nservers; i++) + ares__close_sockets(&channel->servers[i]); + } +} diff --git a/libares/ares_query.3 b/libares/ares_query.3 new file mode 100644 index 0000000..a6e8b7a --- /dev/null +++ b/libares/ares_query.3 @@ -0,0 +1,142 @@ +.\" $Id: ares_query.3,v 1.1 1998/08/13 18:07:34 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_QUERY 3 "24 July 1998" +.SH NAME +ares_query \- Initiate a single-question DNS query +.SH SYNOPSIS +.nf +.B #include +.PP +.B typedef void (*ares_callback)(void *\fIarg\fP, int \fIstatus\fP, +.B unsigned char *\fIabuf\fP, int \fIalen\fP) +.PP +.B void ares_query(ares_channel \fIchannel\fP, const char *\fIname\fP, +.B int \fIclass\fP, int \fItype\fP, ares_callback \fIcallback\fP, +.B void *\fIarg\fP) +.fi +.SH DESCRIPTION +The +.B ares_query +function initiates a single-question DNS query on the name service +channel identified by +.IR channel . +The parameter +.I name +gives the query name as a NUL-terminated C string of period-separated +labels optionally ending with a period; periods and backslashes within +a label must be escaped with a backslash. The parameters +.I class +and +.I type +give the class and type of the query using the values defined in +.BR . +When the query is complete or has failed, the ares library will invoke +.IR callback . +Completion or failure of the query may happen immediately, or may +happen during a later call to +.BR ares_process (3) +or +.BR ares_destroy (3). +.PP +The callback argument +.I arg +is copied from the +.B ares_query +argument +.IR arg . +The callback argument +.I status +indicates whether the query succeeded and, if not, how it failed. It +may have any of the following values: +.TP 19 +.B ARES_SUCCESS +The query completed successfully. +.TP 19 +.B ARES_ENODATA +The query completed but contains no answers. +.TP 19 +.B ARES_EFORMERR +The query completed but the server claims that the query was +malformatted. +.TP 19 +.B ARES_ESERVFAIL +The query completed but the server claims to have experienced a +failure. (This code can only occur if the +.B ARES_FLAG_NOCHECKRESP +flag was specified at channel initialization time; otherwise, such +responses are ignored at the +.BR ares_send (3) +level.) +.TP 19 +.B ARES_ENOTFOUND +The query completed but the queried-for domain name was not found. +.TP 19 +.B ARES_ENOTIMP +The query completed but the server does not implement the operation +requested by the query. (This code can only occur if the +.B ARES_FLAG_NOCHECKRESP +flag was specified at channel initialization time; otherwise, such +responses are ignored at the +.BR ares_send (3) +level.) +.TP 19 +.B ARES_EREFUSED +The query completed but the server refused the query. (This code can +only occur if the +.B ARES_FLAG_NOCHECKRESP +flag was specified at channel initialization time; otherwise, such +responses are ignored at the +.BR ares_send (3) +level.) +.TP 19 +.B ARES_EBADNAME +The query name +.I name +could not be encoded as a domain name, either because it contained a +zero-length label or because it contained a label of more than 63 +characters. +.TP 19 +.B ARES_ETIMEOUT +No name servers responded within the timeout period. +.TP 19 +.B ARES_ECONNREFUSED +No name servers could be contacted. +.TP 19 +.B ARES_ENOMEM +Memory was exhausted. +.TP 19 +.B ARES_EDESTRUCTION +The name service channel +.I channel +is being destroyed; the query will not be completed. +.PP +If the query completed (even if there was something wrong with it, as +indicated by some of the above error codes), the callback argument +.I abuf +points to a result buffer of length +.IR alen . +If the query did not complete, +.I abuf +will be NULL and +.I alen +will be 0. +.SH SEE ALSO +.BR ares_process (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_query.c b/libares/ares_query.c new file mode 100644 index 0000000..0c2be97 --- /dev/null +++ b/libares/ares_query.c @@ -0,0 +1,105 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_query.c,v 1.4 2000/01/05 16:29:44 ghudson Exp $"; + +#include +#include +#include +#include +#include "ares.h" +#include "ares_dns.h" +#include "ares_private.h" + +struct qquery { + ares_callback callback; + void *arg; +}; + +static void qcallback(void *arg, int status, unsigned char *abuf, int alen); + +void ares_query(ares_channel channel, const char *name, int class, + int type, ares_callback callback, void *arg) +{ + struct qquery *qquery; + unsigned char *qbuf; + int qlen, rd, status; + + /* Compose the query. */ + rd = !(channel->flags & ARES_FLAG_NORECURSE); + status = ares_mkquery(name, class, type, channel->next_id, rd, &qbuf, &qlen); + channel->next_id++; + if (status != ARES_SUCCESS) + { + callback(arg, status, NULL, 0); + return; + } + + /* Allocate and fill in the query structure. */ + qquery = malloc(sizeof(struct qquery)); + if (!qquery) + { + ares_free_string(qbuf); + callback(arg, ARES_ENOMEM, NULL, 0); + return; + } + qquery->callback = callback; + qquery->arg = arg; + + /* Send it off. qcallback will be called when we get an answer. */ + ares_send(channel, qbuf, qlen, qcallback, qquery); + ares_free_string(qbuf); +} + +static void qcallback(void *arg, int status, unsigned char *abuf, int alen) +{ + struct qquery *qquery = (struct qquery *) arg; + unsigned int ancount; + int rcode; + + if (status != ARES_SUCCESS) + qquery->callback(qquery->arg, status, abuf, alen); + else + { + /* Pull the response code and answer count from the packet. */ + rcode = DNS_HEADER_RCODE(abuf); + ancount = DNS_HEADER_ANCOUNT(abuf); + + /* Convert errors. */ + switch (rcode) + { + case NOERROR: + status = (ancount > 0) ? ARES_SUCCESS : ARES_ENODATA; + break; + case FORMERR: + status = ARES_EFORMERR; + break; + case SERVFAIL: + status = ARES_ESERVFAIL; + break; + case NXDOMAIN: + status = ARES_ENOTFOUND; + break; + case NOTIMP: + status = ARES_ENOTIMP; + break; + case REFUSED: + status = ARES_EREFUSED; + break; + } + qquery->callback(qquery->arg, status, abuf, alen); + } + free(qquery); +} diff --git a/libares/ares_search.3 b/libares/ares_search.3 new file mode 100644 index 0000000..f9ceb23 --- /dev/null +++ b/libares/ares_search.3 @@ -0,0 +1,144 @@ +.\" $Id: ares_search.3,v 1.1 1998/08/13 18:07:35 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_SEARCH 3 "24 July 1998" +.SH NAME +ares_search \- Initiate a DNS query with domain search +.SH SYNOPSIS +.nf +.B #include +.PP +.B typedef void (*ares_callback)(void *\fIarg\fP, int \fIstatus\fP, +.B unsigned char *\fIabuf\fP, int \fIalen\fP) +.PP +.B void ares_search(ares_channel \fIchannel\fP, const char *\fIname\fP, +.B int \fIclass\fP, int \fItype\fP, ares_callback \fIcallback\fP, +.B void *\fIarg\fP) +.fi +.SH DESCRIPTION +The +.B ares_search +function initiates a series of single-question DNS queries on the name +service channel identified by +.IR channel , +using the channel's search domains as well as a host alias file given +by the HOSTALIAS environment variable. The parameter +.I name +gives the alias name or the base of the query name as a NUL-terminated +C string of period-separated labels; if it ends with a period, the +channel's search domains will not be used. Periods and backslashes +within a label must be escaped with a backslash. The parameters +.I class +and +.I type +give the class and type of the query using the values defined in +.BR . +When the query sequence is complete or has failed, the ares library +will invoke +.IR callback . +Completion or failure of the query sequence may happen immediately, or +may happen during a later call to +.BR ares_process (3) +or +.BR ares_destroy (3). +.PP +The callback argument +.I arg +is copied from the +.B ares_search +argument +.IR arg . +The callback argument +.I status +indicates whether the query sequence ended with a successful query +and, if not, how the query sequence failed. It may have any of the +following values: +.TP 19 +.B ARES_SUCCESS +A query completed successfully. +.TP 19 +.B ARES_ENODATA +No query completed successfully; when the query was tried without a +search domain appended, a response was returned with no answers. +.TP 19 +.B ARES_EFORMERR +A query completed but the server claimed that the query was +malformatted. +.TP 19 +.B ARES_ESERVFAIL +No query completed successfully; when the query was tried without a +search domain appended, the server claimed to have experienced a +failure. (This code can only occur if the +.B ARES_FLAG_NOCHECKRESP +flag was specified at channel initialization time; otherwise, such +responses are ignored at the +.BR ares_send (3) +level.) +.TP 19 +.B ARES_ENOTFOUND +No query completed successfully; when the query was tried without a +search domain appended, the server reported that the queried-for +domain name was not found. +.TP 19 +.B ARES_ENOTIMP +A query completed but the server does not implement the operation +requested by the query. (This code can only occur if the +.B ARES_FLAG_NOCHECKRESP +flag was specified at channel initialization time; otherwise, such +responses are ignored at the +.BR ares_send (3) +level.) +.TP 19 +.B ARES_EREFUSED +A query completed but the server refused the query. (This code can +only occur returned if the +.B ARES_FLAG_NOCHECKRESP +flag was specified at channel initialization time; otherwise, such +responses are ignored at the +.BR ares_send (3) +level.) +.TP 19 +.B ARES_TIMEOUT +No name servers responded to a query within the timeout period. +.TP 19 +.B ARES_ECONNREFUSED +No name servers could be contacted. +.TP 19 +.B ARES_ENOMEM +Memory was exhausted. +.TP 19 +.B ARES_EDESTRUCTION +The name service channel +.I channel +is being destroyed; the query will not be completed. +.PP +If a query completed successfully, the callback argument +.I abuf +points to a result buffer of length +.IR alen . +If the query did not complete successfully, +.I abuf +will usually be NULL and +.I alen +will usually be 0, but in some cases an unsuccessful query result may +be placed in +.IR abuf . +.SH SEE ALSO +.BR ares_process (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_search.c b/libares/ares_search.c new file mode 100644 index 0000000..f37a9ef --- /dev/null +++ b/libares/ares_search.c @@ -0,0 +1,268 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_search.c,v 1.2 1999/10/23 19:28:14 danw Exp $"; + +#include +#include +#include +#include +#include "ares.h" +#include "ares_private.h" + +struct search_query { + /* Arguments passed to ares_search */ + ares_channel channel; + char *name; /* copied into an allocated buffer */ + int class; + int type; + ares_callback callback; + void *arg; + + int status_as_is; /* error status from trying as-is */ + int next_domain; /* next search domain to try */ + int trying_as_is; /* current query is for name as-is */ +}; + +static void search_callback(void *arg, int status, unsigned char *abuf, + int alen); +static void end_squery(struct search_query *squery, int status, + unsigned char *abuf, int alen); +static int cat_domain(const char *name, const char *domain, char **s); +static int single_domain(ares_channel channel, const char *name, char **s); + +void ares_search(ares_channel channel, const char *name, int class, + int type, ares_callback callback, void *arg) +{ + struct search_query *squery; + char *s; + const char *p; + int status, ndots; + + /* If name only yields one domain to search, then we don't have + * to keep extra state, so just do an ares_query(). + */ + status = single_domain(channel, name, &s); + if (status != ARES_SUCCESS) + { + callback(arg, status, NULL, 0); + return; + } + if (s) + { + ares_query(channel, s, class, type, callback, arg); + free(s); + return; + } + + /* Allocate a search_query structure to hold the state necessary for + * doing multiple lookups. + */ + squery = malloc(sizeof(struct search_query)); + if (!squery) + { + callback(arg, ARES_ENOMEM, NULL, 0); + return; + } + squery->channel = channel; + squery->name = strdup(name); + if (!squery->name) + { + free(squery); + callback(arg, ARES_ENOMEM, NULL, 0); + return; + } + squery->class = class; + squery->type = type; + squery->status_as_is = -1; + squery->callback = callback; + squery->arg = arg; + + /* Count the number of dots in name. */ + ndots = 0; + for (p = name; *p; p++) + { + if (*p == '.') + ndots++; + } + + /* If ndots is at least the channel ndots threshold (usually 1), + * then we try the name as-is first. Otherwise, we try the name + * as-is last. + */ + if (ndots >= channel->ndots) + { + /* Try the name as-is first. */ + squery->next_domain = 0; + squery->trying_as_is = 1; + ares_query(channel, name, class, type, search_callback, squery); + } + else + { + /* Try the name as-is last; start with the first search domain. */ + squery->next_domain = 1; + squery->trying_as_is = 0; + status = cat_domain(name, channel->domains[0], &s); + if (status == ARES_SUCCESS) + { + ares_query(channel, s, class, type, search_callback, squery); + free(s); + } + else + callback(arg, status, NULL, 0); + } +} + +static void search_callback(void *arg, int status, unsigned char *abuf, + int alen) +{ + struct search_query *squery = (struct search_query *) arg; + ares_channel channel = squery->channel; + char *s; + + /* Stop searching unless we got a non-fatal error. */ + if (status != ARES_ENODATA && status != ARES_ESERVFAIL + && status != ARES_ENOTFOUND) + end_squery(squery, status, abuf, alen); + else + { + /* Save the status if we were trying as-is. */ + if (squery->trying_as_is) + squery->status_as_is = status; + if (squery->next_domain < channel->ndomains) + { + /* Try the next domain. */ + status = cat_domain(squery->name, + channel->domains[squery->next_domain], &s); + if (status != ARES_SUCCESS) + end_squery(squery, status, NULL, 0); + else + { + squery->trying_as_is = 0; + squery->next_domain++; + ares_query(channel, s, squery->class, squery->type, + search_callback, squery); + free(s); + } + } + else if (squery->status_as_is == -1) + { + /* Try the name as-is at the end. */ + squery->trying_as_is = 1; + ares_query(channel, squery->name, squery->class, squery->type, + search_callback, squery); + } + else + end_squery(squery, squery->status_as_is, NULL, 0); + } +} + +static void end_squery(struct search_query *squery, int status, + unsigned char *abuf, int alen) +{ + squery->callback(squery->arg, status, abuf, alen); + free(squery->name); + free(squery); +} + +/* Concatenate two domains. */ +static int cat_domain(const char *name, const char *domain, char **s) +{ + int nlen = strlen(name), dlen = strlen(domain); + + *s = malloc(nlen + 1 + dlen + 1); + if (!*s) + return ARES_ENOMEM; + memcpy(*s, name, nlen); + (*s)[nlen] = '.'; + memcpy(*s + nlen + 1, domain, dlen); + (*s)[nlen + 1 + dlen] = 0; + return ARES_SUCCESS; +} + +/* Determine if this name only yields one query. If it does, set *s to + * the string we should query, in an allocated buffer. If not, set *s + * to NULL. + */ +static int single_domain(ares_channel channel, const char *name, char **s) +{ + int len = strlen(name); + const char *hostaliases; + FILE *fp; + char *line = NULL; + int linesize, status; + const char *p, *q; + + /* If the name contains a trailing dot, then the single query is the name + * sans the trailing dot. + */ + if (name[len - 1] == '.') + { + *s = strdup(name); + return (*s) ? ARES_SUCCESS : ARES_ENOMEM; + } + + if (!(channel->flags & ARES_FLAG_NOALIASES) && !strchr(name, '.')) + { + /* The name might be a host alias. */ + hostaliases = getenv("HOSTALIASES"); + if (hostaliases) + { + fp = fopen(hostaliases, "r"); + if (fp) + { + while ((status = ares__read_line(fp, &line, &linesize)) + == ARES_SUCCESS) + { + if (strncasecmp(line, name, len) != 0 || + !isspace((unsigned char)line[len])) + continue; + p = line + len; + while (isspace((unsigned char)*p)) + p++; + if (*p) + { + q = p + 1; + while (*q && !isspace((unsigned char)*q)) + q++; + *s = malloc(q - p + 1); + if (*s) + { + memcpy(*s, p, q - p); + (*s)[q - p] = 0; + } + free(line); + fclose(fp); + return (*s) ? ARES_SUCCESS : ARES_ENOMEM; + } + } + free(line); + fclose(fp); + if (status != ARES_SUCCESS) + return status; + } + } + } + + if (channel->flags & ARES_FLAG_NOSEARCH || channel->ndomains == 0) + { + /* No domain search to do; just try the name as-is. */ + *s = strdup(name); + return (*s) ? ARES_SUCCESS : ARES_ENOMEM; + } + + *s = NULL; + return ARES_SUCCESS; +} diff --git a/libares/ares_send.3 b/libares/ares_send.3 new file mode 100644 index 0000000..f3e591b --- /dev/null +++ b/libares/ares_send.3 @@ -0,0 +1,117 @@ +.\" $Id: ares_send.3,v 1.1 1998/08/13 18:07:35 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_SEND 3 "25 July 1998" +.SH NAME +ares_send \- Initiate a DNS query +.SH SYNOPSIS +.nf +.B #include +.PP +.B typedef void (*ares_callback)(void *\fIarg\fP, int \fIstatus\fP, +.B unsigned char *\fIabuf\fP, int \fIalen\fP) +.PP +.B +void ares_send(ares_channel \fIchannel\fP, const unsigned char *\fIqbuf\fP, +.B int \fIqlen\fP, ares_callback \fIcallback\fP, void *\fIarg\fP) +.fi +.SH DESCRIPTION +The +.B ares_send +function initiates a DNS query on the name service channel identified +by +.IR channel . +The parameters +.I qbuf +and +.I qlen +give the DNS query, which should already have been formatted according +to the DNS protocol. When the query is complete or has failed, the +ares library will invoke +.IR callback . +Completion or failure of the query may happen immediately, or may +happen during a later call to +.BR ares_process (3) +or +.BR ares_destroy (3). +.PP +The callback argument +.I arg +is copied from the +.B ares_send +argument +.IR arg . +The callback argument +.I status +indicates whether the query succeeded and, if not, how it failed. It +may have any of the following values: +.TP 19 +.B ARES_SUCCESS +The query completed. +.TP 19 +.B ARES_EBADQUERY +The query buffer was poorly formed (was not long enough for a DNS +header or was too long for TCP transmission). +.TP 19 +.B ARES_ETIMEOUT +No name servers responded within the timeout period. +.TP 19 +.B ARES_ECONNREFUSED +No name servers could be contacted. +.TP 19 +.B ARES_ENOMEM +Memory was exhausted. +.TP 19 +.B ARES_EDESTRUCTION +The name service channel +.I channel +is being destroyed; the query will not be completed. +.PP +If the query completed, the callback argument +.I abuf +points to a result buffer of length +.IR alen . +If the query did not complete, +.I abuf +will be NULL and +.I alen +will be 0. +.PP +Unless the flag +.B ARES_FLAG_NOCHECKRESP +was set at channel initialization time, +.B ares_send +will normally ignore responses whose questions do not match the +questions in +.IR qbuf , +as well as responses with reply codes of +.BR SERVFAIL , +.BR NOTIMP , +and +.BR REFUSED . +Unlike other query functions in the ares library, however, +.B ares_send +does not inspect the header of the reply packet to determine the error +status, so a callback status of +.B ARES_SUCCESS +does not reflect as much about the response as for other query +functions. +.SH SEE ALSO +.BR ares_process (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_send.c b/libares/ares_send.c new file mode 100644 index 0000000..240ed8d --- /dev/null +++ b/libares/ares_send.c @@ -0,0 +1,98 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_send.c,v 1.3 1999/10/23 19:28:14 danw Exp $"; + +#include +#include +#include +#include +#include +#include +#include "ares.h" +#include "ares_dns.h" +#include "ares_private.h" + +void ares_send(ares_channel channel, const unsigned char *qbuf, int qlen, + ares_callback callback, void *arg) +{ + struct query *query; + int i; + time_t now; + + /* Verify that the query is at least long enough to hold the header. */ + if (qlen < HFIXEDSZ || qlen >= (1 << 16)) + { + callback(arg, ARES_EBADQUERY, NULL, 0); + return; + } + + /* Allocate space for query and allocated fields. */ + query = malloc(sizeof(struct query)); + if (!query) + { + callback(arg, ARES_ENOMEM, NULL, 0); + return; + } + query->tcpbuf = malloc(qlen + 2); + if (!query->tcpbuf) + { + free(query); + callback(arg, ARES_ENOMEM, NULL, 0); + return; + } + query->skip_server = malloc(channel->nservers * sizeof(int)); + if (!query->skip_server) + { + free(query->tcpbuf); + free(query); + callback(arg, ARES_ENOMEM, NULL, 0); + return; + } + + /* Compute the query ID. Start with no timeout. */ + query->qid = DNS_HEADER_QID(qbuf); + query->timeout = 0; + + /* Form the TCP query buffer by prepending qlen (as two + * network-order bytes) to qbuf. + */ + query->tcpbuf[0] = (qlen >> 8) & 0xff; + query->tcpbuf[1] = qlen & 0xff; + memcpy(query->tcpbuf + 2, qbuf, qlen); + query->tcplen = qlen + 2; + + /* Fill in query arguments. */ + query->qbuf = query->tcpbuf + 2; + query->qlen = qlen; + query->callback = callback; + query->arg = arg; + + /* Initialize query status. */ + query->try = 0; + query->server = 0; + for (i = 0; i < channel->nservers; i++) + query->skip_server[i] = 0; + query->using_tcp = (channel->flags & ARES_FLAG_USEVC) || qlen > PACKETSZ; + query->error_status = ARES_ECONNREFUSED; + + /* Chain the query into this channel's query list. */ + query->next = channel->queries; + channel->queries = query; + + /* Perform the first query action. */ + time(&now); + ares__send_query(channel, query, now); +} diff --git a/libares/ares_strerror.3 b/libares/ares_strerror.3 new file mode 100644 index 0000000..609438e --- /dev/null +++ b/libares/ares_strerror.3 @@ -0,0 +1,44 @@ +.\" $Id: ares_strerror.3,v 1.1 1998/08/13 18:07:36 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_STRERROR 3 "25 July 1998" +.SH NAME +ares_strerror \- Get the description of an ares library error code +.SH SYNOPSIS +.nf +.B #include +.PP +.B const char *ares_strerror(int \fIcode\fP, char **\fImemptr\fP) +.fi +.SH DESCRIPTION +The +.B ares_strerror +function gets the description of the ares library error code +.IR code , +returning the result as a NUL-terminated C string. A pointer to +allocated data necessary to compose the error description may be +stored in the variable pointed to by +.IR memptr . +It is the caller's responsibility to invoke +.BR ares_free_errmem (3) +with the value of that variable when the error description is no +longer needed. +.SH SEE ALSO +.BR ares_free_errmem (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_strerror.c b/libares/ares_strerror.c new file mode 100644 index 0000000..10d922f --- /dev/null +++ b/libares/ares_strerror.c @@ -0,0 +1,47 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_strerror.c,v 1.1 1998/08/13 18:06:35 ghudson Exp $"; + +#include +#include "ares.h" + +const char *ares_strerror(int code, char **memptr) +{ + /* A future implementation may want to handle internationalization. + * For now, just return a string literal from a table. + */ + const char *errtext[] = { + "Successful completion", + "DNS server returned answer with no data", + "DNS server claims query was misformatted", + "DNS server returned general failure", + "Domain name not found", + "DNS server does not implement requested operation", + "DNS server refused query", + "Misformatted DNS query", + "Misformatted domain name", + "Unsupported address family", + "Misformatted DNS reply", + "Could not contact DNS servers", + "Timeout while contacting DNS servers", + "End of file", + "Error reading file", + "Out of memory" + }; + + assert(code >= 0 && code < (sizeof(errtext) / sizeof(*errtext))); + return errtext[code]; +} diff --git a/libares/ares_timeout.3 b/libares/ares_timeout.3 new file mode 100644 index 0000000..89d71f6 --- /dev/null +++ b/libares/ares_timeout.3 @@ -0,0 +1,64 @@ +.\" $Id: ares_timeout.3,v 1.1 1998/08/13 18:07:36 ghudson Exp $ +.\" +.\" Copyright 1998 by the Massachusetts Institute of Technology. +.\" +.\" Permission to use, copy, modify, and distribute this +.\" software and its documentation for any purpose and without +.\" fee is hereby granted, provided that the above copyright +.\" notice appear in all copies and that both that copyright +.\" notice and this permission notice appear in supporting +.\" documentation, and that the name of M.I.T. not be used in +.\" advertising or publicity pertaining to distribution of the +.\" software without specific, written prior permission. +.\" M.I.T. makes no representations about the suitability of +.\" this software for any purpose. It is provided "as is" +.\" without express or implied warranty. +.\" +.TH ARES_TIMEOUT 3 "25 July 1998" +.SH NAME +ares_fds \- Get file descriptors to select on for name service +.SH SYNOPSIS +.nf +.B #include +.PP +.B struct timeval *ares_timeout(ares_channel \fIchannel\fP, +.B struct timeval *\fImaxtv\fP, struct timeval *\fItvbuf\fP) +.fi +.SH DESCRIPTION +The +.B ares_timeout +function determines the maximum time for which the caller should wait +before invoking +.BR ares_process (3) +to process timeouts. The parameter +.I maxtv +specifies a existing maximum timeout, or +.B NULL +if the caller does not wish to apply a maximum timeout. The parameter +.I tvbuf +must point to a writable buffer of type +.BR "struct timeval" . +It is valid for +.I maxtv +and +.I tvbuf +to have the same value. +.PP +If no queries have timeouts pending sooner than the given maximum +timeout, +.B ares_timeout +returns the value of +.IR maxtv; +otherwise +.B ares_timeout +stores the appropriate timeout value into the buffer pointed to by +.I tvbuf +and returns the value of +.IR tvbuf . +.SH SEE ALSO +.BR ares_fds (3), +.BR ares_process (3) +.SH AUTHOR +Greg Hudson, MIT Information Systems +.br +Copyright 1998 by the Massachusetts Institute of Technology. diff --git a/libares/ares_timeout.c b/libares/ares_timeout.c new file mode 100644 index 0000000..f33f091 --- /dev/null +++ b/libares/ares_timeout.c @@ -0,0 +1,61 @@ +/* Copyright 1998 by the Massachusetts Institute of Technology. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies and that both that copyright + * notice and this permission notice appear in supporting + * documentation, and that the name of M.I.T. not be used in + * advertising or publicity pertaining to distribution of the + * software without specific, written prior permission. + * M.I.T. makes no representations about the suitability of + * this software for any purpose. It is provided "as is" + * without express or implied warranty. + */ + +static const char rcsid[] = "$Id: ares_timeout.c,v 1.1 1998/08/13 18:06:35 ghudson Exp $"; + +#include +#include +#include +#include "ares.h" +#include "ares_private.h" + +struct timeval *ares_timeout(ares_channel channel, struct timeval *maxtv, + struct timeval *tvbuf) +{ + struct query *query; + time_t now; + int offset, min_offset; + + /* No queries, no timeout (and no fetch of the current time). */ + if (!channel->queries) + return maxtv; + + /* Find the minimum timeout for the current set of queries. */ + time(&now); + min_offset = -1; + for (query = channel->queries; query; query = query->next) + { + if (query->timeout == 0) + continue; + offset = query->timeout - now; + if (offset < 0) + offset = 0; + if (min_offset == -1 || offset < min_offset) + min_offset = offset; + } + + /* If we found a minimum timeout and it's sooner than the one + * specified in maxtv (if any), return it. Otherwise go with + * maxtv. + */ + if (min_offset != -1 && (!maxtv || min_offset <= maxtv->tv_sec)) + { + tvbuf->tv_sec = min_offset; + tvbuf->tv_usec = 0; + return tvbuf; + } + else + return maxtv; +} diff --git a/libares/config.guess b/libares/config.guess new file mode 100755 index 0000000..2960d6e --- /dev/null +++ b/libares/config.guess @@ -0,0 +1,951 @@ +#! /bin/sh +# Attempt to guess a canonical system name. +# Copyright (C) 1992, 93, 94, 95, 96, 97, 1998 Free Software Foundation, Inc. +# +# This file is free software; you can redistribute it and/or modify it +# under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, but +# WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +# General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +# +# As a special exception to the GNU General Public License, if you +# distribute this file as part of a program that contains a +# configuration script generated by Autoconf, you may include it under +# the same distribution terms that you use for the rest of that program. + +# Written by Per Bothner . +# The master version of this file is at the FSF in /home/gd/gnu/lib. +# +# This script attempts to guess a canonical system name similar to +# config.sub. If it succeeds, it prints the system name on stdout, and +# exits with 0. Otherwise, it exits with 1. +# +# The plan is that this can be called by configure scripts if you +# don't specify an explicit system type (host/target name). +# +# Only a few systems have been added to this list; please add others +# (but try to keep the structure clean). +# + +# This is needed to find uname on a Pyramid OSx when run in the BSD universe. +# (ghazi@noc.rutgers.edu 8/24/94.) +if (test -f /.attbin/uname) >/dev/null 2>&1 ; then + PATH=$PATH:/.attbin ; export PATH +fi + +UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown +UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown +UNAME_SYSTEM=`(uname -s) 2>/dev/null` || UNAME_SYSTEM=unknown +UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown + +trap 'rm -f dummy.c dummy.o dummy; exit 1' 1 2 15 + +# Note: order is significant - the case branches are not exclusive. + +case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in + alpha:OSF1:*:*) + if test $UNAME_RELEASE = "V4.0"; then + UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $3}'` + fi + # A Vn.n version is a released version. + # A Tn.n version is a released field test version. + # A Xn.n version is an unreleased experimental baselevel. + # 1.2 uses "1.2" for uname -r. + cat <dummy.s + .globl main + .ent main +main: + .frame \$30,0,\$26,0 + .prologue 0 + .long 0x47e03d80 # implver $0 + lda \$2,259 + .long 0x47e20c21 # amask $2,$1 + srl \$1,8,\$2 + sll \$2,2,\$2 + sll \$0,3,\$0 + addl \$1,\$0,\$0 + addl \$2,\$0,\$0 + ret \$31,(\$26),1 + .end main +EOF + ${CC-cc} dummy.s -o dummy 2>/dev/null + if test "$?" = 0 ; then + ./dummy + case "$?" in + 7) + UNAME_MACHINE="alpha" + ;; + 15) + UNAME_MACHINE="alphaev5" + ;; + 14) + UNAME_MACHINE="alphaev56" + ;; + 10) + UNAME_MACHINE="alphapca56" + ;; + 16) + UNAME_MACHINE="alphaev6" + ;; + esac + fi + rm -f dummy.s dummy + echo ${UNAME_MACHINE}-dec-osf`echo ${UNAME_RELEASE} | sed -e 's/^[VTX]//' | tr [[A-Z]] [[a-z]]` + exit 0 ;; + 21064:Windows_NT:50:3) + echo alpha-dec-winnt3.5 + exit 0 ;; + Amiga*:UNIX_System_V:4.0:*) + echo m68k-cbm-sysv4 + exit 0;; + amiga:NetBSD:*:*) + echo m68k-cbm-netbsd${UNAME_RELEASE} + exit 0 ;; + amiga:OpenBSD:*:*) + echo m68k-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + *:[Aa]miga[Oo][Ss]:*:*) + echo ${UNAME_MACHINE}-unknown-amigaos + exit 0 ;; + arc64:OpenBSD:*:*) + echo mips64el-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + arc:OpenBSD:*:*) + echo mipsel-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + hkmips:OpenBSD:*:*) + echo mips-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + pmax:OpenBSD:*:*) + echo mipsel-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + sgi:OpenBSD:*:*) + echo mips-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + wgrisc:OpenBSD:*:*) + echo mipsel-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + arm:RISC*:1.[012]*:*|arm:riscix:1.[012]*:*) + echo arm-acorn-riscix${UNAME_RELEASE} + exit 0;; + arm32:NetBSD:*:*) + echo arm-unknown-netbsd`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'` + exit 0 ;; + SR2?01:HI-UX/MPP:*:*) + echo hppa1.1-hitachi-hiuxmpp + exit 0;; + Pyramid*:OSx*:*:*|MIS*:OSx*:*:*|MIS*:SMP_DC-OSx*:*:*) + # akee@wpdis03.wpafb.af.mil (Earle F. Ake) contributed MIS and NILE. + if test "`(/bin/universe) 2>/dev/null`" = att ; then + echo pyramid-pyramid-sysv3 + else + echo pyramid-pyramid-bsd + fi + exit 0 ;; + NILE:*:*:dcosx) + echo pyramid-pyramid-svr4 + exit 0 ;; + sun4H:SunOS:5.*:*) + echo sparc-hal-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` + exit 0 ;; + sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*) + echo sparc-sun-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` + exit 0 ;; + i86pc:SunOS:5.*:*) + echo i386-pc-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` + exit 0 ;; + sun4*:SunOS:6*:*) + # According to config.sub, this is the proper way to canonicalize + # SunOS6. Hard to guess exactly what SunOS6 will be like, but + # it's likely to be more like Solaris than SunOS4. + echo sparc-sun-solaris3`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` + exit 0 ;; + sun4*:SunOS:*:*) + case "`/usr/bin/arch -k`" in + Series*|S4*) + UNAME_RELEASE=`uname -v` + ;; + esac + # Japanese Language versions have a version number like `4.1.3-JL'. + echo sparc-sun-sunos`echo ${UNAME_RELEASE}|sed -e 's/-/_/'` + exit 0 ;; + sun3*:SunOS:*:*) + echo m68k-sun-sunos${UNAME_RELEASE} + exit 0 ;; + sun*:*:4.2BSD:*) + UNAME_RELEASE=`(head -1 /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null` + test "x${UNAME_RELEASE}" = "x" && UNAME_RELEASE=3 + case "`/bin/arch`" in + sun3) + echo m68k-sun-sunos${UNAME_RELEASE} + ;; + sun4) + echo sparc-sun-sunos${UNAME_RELEASE} + ;; + esac + exit 0 ;; + aushp:SunOS:*:*) + echo sparc-auspex-sunos${UNAME_RELEASE} + exit 0 ;; + atari*:NetBSD:*:*) + echo m68k-atari-netbsd${UNAME_RELEASE} + exit 0 ;; + atari*:OpenBSD:*:*) + echo m68k-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + sun3*:NetBSD:*:*) + echo m68k-sun-netbsd${UNAME_RELEASE} + exit 0 ;; + sun3*:OpenBSD:*:*) + echo m68k-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + mac68k:NetBSD:*:*) + echo m68k-apple-netbsd${UNAME_RELEASE} + exit 0 ;; + mac68k:OpenBSD:*:*) + echo m68k-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + mvme68k:OpenBSD:*:*) + echo m68k-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + mvme88k:OpenBSD:*:*) + echo m88k-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + powerpc:machten:*:*) + echo powerpc-apple-machten${UNAME_RELEASE} + exit 0 ;; + macppc:NetBSD:*:*) + echo powerpc-apple-netbsd${UNAME_RELEASE} + exit 0 ;; + RISC*:Mach:*:*) + echo mips-dec-mach_bsd4.3 + exit 0 ;; + RISC*:ULTRIX:*:*) + echo mips-dec-ultrix${UNAME_RELEASE} + exit 0 ;; + VAX*:ULTRIX*:*:*) + echo vax-dec-ultrix${UNAME_RELEASE} + exit 0 ;; + 2020:CLIX:*:*) + echo clipper-intergraph-clix${UNAME_RELEASE} + exit 0 ;; + mips:*:*:UMIPS | mips:*:*:RISCos) + sed 's/^ //' << EOF >dummy.c + int main (argc, argv) int argc; char **argv; { + #if defined (host_mips) && defined (MIPSEB) + #if defined (SYSTYPE_SYSV) + printf ("mips-mips-riscos%ssysv\n", argv[1]); exit (0); + #endif + #if defined (SYSTYPE_SVR4) + printf ("mips-mips-riscos%ssvr4\n", argv[1]); exit (0); + #endif + #if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD) + printf ("mips-mips-riscos%sbsd\n", argv[1]); exit (0); + #endif + #endif + exit (-1); + } +EOF + ${CC-cc} dummy.c -o dummy \ + && ./dummy `echo "${UNAME_RELEASE}" | sed -n 's/\([0-9]*\).*/\1/p'` \ + && rm dummy.c dummy && exit 0 + rm -f dummy.c dummy + echo mips-mips-riscos${UNAME_RELEASE} + exit 0 ;; + Night_Hawk:Power_UNIX:*:*) + echo powerpc-harris-powerunix + exit 0 ;; + m88k:CX/UX:7*:*) + echo m88k-harris-cxux7 + exit 0 ;; + m88k:*:4*:R4*) + echo m88k-motorola-sysv4 + exit 0 ;; + m88k:*:3*:R3*) + echo m88k-motorola-sysv3 + exit 0 ;; + AViiON:dgux:*:*) + # DG/UX returns AViiON for all architectures + UNAME_PROCESSOR=`/usr/bin/uname -p` + if [ $UNAME_PROCESSOR = mc88100 -o $UNAME_PROCESSOR = mc88110 ] ; then + if [ ${TARGET_BINARY_INTERFACE}x = m88kdguxelfx \ + -o ${TARGET_BINARY_INTERFACE}x = x ] ; then + echo m88k-dg-dgux${UNAME_RELEASE} + else + echo m88k-dg-dguxbcs${UNAME_RELEASE} + fi + else echo i586-dg-dgux${UNAME_RELEASE} + fi + exit 0 ;; + M88*:DolphinOS:*:*) # DolphinOS (SVR3) + echo m88k-dolphin-sysv3 + exit 0 ;; + M88*:*:R3*:*) + # Delta 88k system running SVR3 + echo m88k-motorola-sysv3 + exit 0 ;; + XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3) + echo m88k-tektronix-sysv3 + exit 0 ;; + Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD) + echo m68k-tektronix-bsd + exit 0 ;; + *:IRIX*:*:*) + echo mips-sgi-irix`echo ${UNAME_RELEASE}|sed -e 's/-/_/g'` + exit 0 ;; + ????????:AIX?:[12].1:2) # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX. + echo romp-ibm-aix # uname -m gives an 8 hex-code CPU id + exit 0 ;; # Note that: echo "'`uname -s`'" gives 'AIX ' + i?86:AIX:*:*) + echo i386-ibm-aix + exit 0 ;; + *:AIX:2:3) + if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then + sed 's/^ //' << EOF >dummy.c + #include + + main() + { + if (!__power_pc()) + exit(1); + puts("powerpc-ibm-aix3.2.5"); + exit(0); + } +EOF + ${CC-cc} dummy.c -o dummy && ./dummy && rm dummy.c dummy && exit 0 + rm -f dummy.c dummy + echo rs6000-ibm-aix3.2.5 + elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then + echo rs6000-ibm-aix3.2.4 + else + echo rs6000-ibm-aix3.2 + fi + exit 0 ;; + *:AIX:*:4) + IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | head -1 | awk '{ print $1 }'` + if /usr/sbin/lsattr -EHl ${IBM_CPU_ID} | grep POWER >/dev/null 2>&1; then + IBM_ARCH=rs6000 + else + IBM_ARCH=powerpc + fi + if [ -x /usr/bin/oslevel ] ; then + IBM_REV=`/usr/bin/oslevel` + else + IBM_REV=4.${UNAME_RELEASE} + fi + echo ${IBM_ARCH}-ibm-aix${IBM_REV} + exit 0 ;; + *:AIX:*:*) + echo rs6000-ibm-aix + exit 0 ;; + ibmrt:4.4BSD:*|romp-ibm:BSD:*) + echo romp-ibm-bsd4.4 + exit 0 ;; + ibmrt:*BSD:*|romp-ibm:BSD:*) # covers RT/PC NetBSD and + echo romp-ibm-bsd${UNAME_RELEASE} # 4.3 with uname added to + exit 0 ;; # report: romp-ibm BSD 4.3 + *:BOSX:*:*) + echo rs6000-bull-bosx + exit 0 ;; + DPX/2?00:B.O.S.:*:*) + echo m68k-bull-sysv3 + exit 0 ;; + 9000/[34]??:4.3bsd:1.*:*) + echo m68k-hp-bsd + exit 0 ;; + hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*) + echo m68k-hp-bsd4.4 + exit 0 ;; + 9000/[34678]??:HP-UX:*:*) + case "${UNAME_MACHINE}" in + 9000/31? ) HP_ARCH=m68000 ;; + 9000/[34]?? ) HP_ARCH=m68k ;; + 9000/6?? | 9000/7?? | 9000/80[24] | 9000/8?[13679] | 9000/892 ) + sed 's/^ //' << EOF >dummy.c + #include + #include + + int main () + { + #if defined(_SC_KERNEL_BITS) + long bits = sysconf(_SC_KERNEL_BITS); + #endif + long cpu = sysconf (_SC_CPU_VERSION); + + switch (cpu) + { + case CPU_PA_RISC1_0: puts ("hppa1.0"); break; + case CPU_PA_RISC1_1: puts ("hppa1.1"); break; + case CPU_PA_RISC2_0: + #if defined(_SC_KERNEL_BITS) + switch (bits) + { + case 64: puts ("hppa2.0w"); break; + case 32: puts ("hppa2.0n"); break; + default: puts ("hppa2.0"); break; + } break; + #else /* !defined(_SC_KERNEL_BITS) */ + puts ("hppa2.0"); break; + #endif + default: puts ("hppa1.0"); break; + } + exit (0); + } +EOF + (${CC-cc} dummy.c -o dummy 2>/dev/null ) && HP_ARCH=`./dummy` + rm -f dummy.c dummy + esac + HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'` + echo ${HP_ARCH}-hp-hpux${HPUX_REV} + exit 0 ;; + 3050*:HI-UX:*:*) + sed 's/^ //' << EOF >dummy.c + #include + int + main () + { + long cpu = sysconf (_SC_CPU_VERSION); + /* The order matters, because CPU_IS_HP_MC68K erroneously returns + true for CPU_PA_RISC1_0. CPU_IS_PA_RISC returns correct + results, however. */ + if (CPU_IS_PA_RISC (cpu)) + { + switch (cpu) + { + case CPU_PA_RISC1_0: puts ("hppa1.0-hitachi-hiuxwe2"); break; + case CPU_PA_RISC1_1: puts ("hppa1.1-hitachi-hiuxwe2"); break; + case CPU_PA_RISC2_0: puts ("hppa2.0-hitachi-hiuxwe2"); break; + default: puts ("hppa-hitachi-hiuxwe2"); break; + } + } + else if (CPU_IS_HP_MC68K (cpu)) + puts ("m68k-hitachi-hiuxwe2"); + else puts ("unknown-hitachi-hiuxwe2"); + exit (0); + } +EOF + ${CC-cc} dummy.c -o dummy && ./dummy && rm dummy.c dummy && exit 0 + rm -f dummy.c dummy + echo unknown-hitachi-hiuxwe2 + exit 0 ;; + 9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:* ) + echo hppa1.1-hp-bsd + exit 0 ;; + 9000/8??:4.3bsd:*:*) + echo hppa1.0-hp-bsd + exit 0 ;; + hp7??:OSF1:*:* | hp8?[79]:OSF1:*:* ) + echo hppa1.1-hp-osf + exit 0 ;; + hp8??:OSF1:*:*) + echo hppa1.0-hp-osf + exit 0 ;; + i?86:OSF1:*:*) + if [ -x /usr/sbin/sysversion ] ; then + echo ${UNAME_MACHINE}-unknown-osf1mk + else + echo ${UNAME_MACHINE}-unknown-osf1 + fi + exit 0 ;; + parisc*:Lites*:*:*) + echo hppa1.1-hp-lites + exit 0 ;; + C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*) + echo c1-convex-bsd + exit 0 ;; + C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*) + if getsysinfo -f scalar_acc + then echo c32-convex-bsd + else echo c2-convex-bsd + fi + exit 0 ;; + C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*) + echo c34-convex-bsd + exit 0 ;; + C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*) + echo c38-convex-bsd + exit 0 ;; + C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*) + echo c4-convex-bsd + exit 0 ;; + CRAY*X-MP:*:*:*) + echo xmp-cray-unicos + exit 0 ;; + CRAY*Y-MP:*:*:*) + echo ymp-cray-unicos${UNAME_RELEASE} + exit 0 ;; + CRAY*[A-Z]90:*:*:*) + echo ${UNAME_MACHINE}-cray-unicos${UNAME_RELEASE} \ + | sed -e 's/CRAY.*\([A-Z]90\)/\1/' \ + -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ + exit 0 ;; + CRAY*TS:*:*:*) + echo t90-cray-unicos${UNAME_RELEASE} + exit 0 ;; + CRAY-2:*:*:*) + echo cray2-cray-unicos + exit 0 ;; + F300:UNIX_System_V:*:*) + FUJITSU_SYS=`uname -p | tr [A-Z] [a-z] | sed -e 's/\///'` + FUJITSU_REL=`echo ${UNAME_RELEASE} | sed -e 's/ /_/'` + echo "f300-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}" + exit 0 ;; + F301:UNIX_System_V:*:*) + echo f301-fujitsu-uxpv`echo $UNAME_RELEASE | sed 's/ .*//'` + exit 0 ;; + hp3[0-9][05]:NetBSD:*:*) + echo m68k-hp-netbsd${UNAME_RELEASE} + exit 0 ;; + hp300:OpenBSD:*:*) + echo m68k-unknown-openbsd${UNAME_RELEASE} + exit 0 ;; + sparc*:BSD/OS:*:*) + echo sparc-unknown-bsdi${UNAME_RELEASE} + exit 0 ;; + i?86:BSD/386:*:* | *:BSD/OS:*:*) + echo ${UNAME_MACHINE}-pc-bsdi${UNAME_RELEASE} + exit 0 ;; + *:FreeBSD:*:*) + echo ${UNAME_MACHINE}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` + exit 0 ;; + *:NetBSD:*:*) + echo ${UNAME_MACHINE}-unknown-netbsd`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'` + exit 0 ;; + *:OpenBSD:*:*) + echo ${UNAME_MACHINE}-unknown-openbsd`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'` + exit 0 ;; + i*:CYGWIN*:*) + echo ${UNAME_MACHINE}-pc-cygwin + exit 0 ;; + i*:MINGW*:*) + echo ${UNAME_MACHINE}-pc-mingw32 + exit 0 ;; + p*:CYGWIN*:*) + echo powerpcle-unknown-cygwin + exit 0 ;; + prep*:SunOS:5.*:*) + echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'` + exit 0 ;; + *:GNU:*:*) + echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-gnu`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'` + exit 0 ;; + *:Linux:*:*) + # uname on the ARM produces all sorts of strangeness, and we need to + # filter it out. + case "$UNAME_MACHINE" in + arm* | sa110*) UNAME_MACHINE="arm" ;; + esac + + # The BFD linker knows what the default object file format is, so + # first see if it will tell us. + ld_help_string=`ld --help 2>&1` + ld_supported_emulations=`echo $ld_help_string \ + | sed -ne '/supported emulations:/!d + s/[ ][ ]*/ /g + s/.*supported emulations: *// + s/ .*// + p'` + case "$ld_supported_emulations" in + i?86linux) echo "${UNAME_MACHINE}-pc-linux-gnuaout" ; exit 0 ;; + i?86coff) echo "${UNAME_MACHINE}-pc-linux-gnucoff" ; exit 0 ;; + sparclinux) echo "${UNAME_MACHINE}-unknown-linux-gnuaout" ; exit 0 ;; + armlinux) echo "${UNAME_MACHINE}-unknown-linux-gnuaout" ; exit 0 ;; + m68klinux) echo "${UNAME_MACHINE}-unknown-linux-gnuaout" ; exit 0 ;; + elf32ppc) echo "powerpc-unknown-linux-gnu" ; exit 0 ;; + esac + + if test "${UNAME_MACHINE}" = "alpha" ; then + sed 's/^ //' <dummy.s + .globl main + .ent main + main: + .frame \$30,0,\$26,0 + .prologue 0 + .long 0x47e03d80 # implver $0 + lda \$2,259 + .long 0x47e20c21 # amask $2,$1 + srl \$1,8,\$2 + sll \$2,2,\$2 + sll \$0,3,\$0 + addl \$1,\$0,\$0 + addl \$2,\$0,\$0 + ret \$31,(\$26),1 + .end main +EOF + LIBC="" + ${CC-cc} dummy.s -o dummy 2>/dev/null + if test "$?" = 0 ; then + ./dummy + case "$?" in + 7) + UNAME_MACHINE="alpha" + ;; + 15) + UNAME_MACHINE="alphaev5" + ;; + 14) + UNAME_MACHINE="alphaev56" + ;; + 10) + UNAME_MACHINE="alphapca56" + ;; + 16) + UNAME_MACHINE="alphaev6" + ;; + esac + + objdump --private-headers dummy | \ + grep ld.so.1 > /dev/null + if test "$?" = 0 ; then + LIBC="libc1" + fi + fi + rm -f dummy.s dummy + echo ${UNAME_MACHINE}-unknown-linux-gnu${LIBC} ; exit 0 + elif test "${UNAME_MACHINE}" = "mips" ; then + cat >dummy.c </dev/null && ./dummy "${UNAME_MACHINE}" && rm dummy.c dummy && exit 0 + rm -f dummy.c dummy + else + # Either a pre-BFD a.out linker (linux-gnuoldld) + # or one that does not give us useful --help. + # GCC wants to distinguish between linux-gnuoldld and linux-gnuaout. + # If ld does not provide *any* "supported emulations:" + # that means it is gnuoldld. + echo "$ld_help_string" | grep >/dev/null 2>&1 "supported emulations:" + test $? != 0 && echo "${UNAME_MACHINE}-pc-linux-gnuoldld" && exit 0 + + case "${UNAME_MACHINE}" in + i?86) + VENDOR=pc; + ;; + *) + VENDOR=unknown; + ;; + esac + # Determine whether the default compiler is a.out or elf + cat >dummy.c < +main(argc, argv) + int argc; + char *argv[]; +{ +#ifdef __ELF__ +# ifdef __GLIBC__ +# if __GLIBC__ >= 2 + printf ("%s-${VENDOR}-linux-gnu\n", argv[1]); +# else + printf ("%s-${VENDOR}-linux-gnulibc1\n", argv[1]); +# endif +# else + printf ("%s-${VENDOR}-linux-gnulibc1\n", argv[1]); +# endif +#else + printf ("%s-${VENDOR}-linux-gnuaout\n", argv[1]); +#endif + return 0; +} +EOF + ${CC-cc} dummy.c -o dummy 2>/dev/null && ./dummy "${UNAME_MACHINE}" && rm dummy.c dummy && exit 0 + rm -f dummy.c dummy + fi ;; +# ptx 4.0 does uname -s correctly, with DYNIX/ptx in there. earlier versions +# are messed up and put the nodename in both sysname and nodename. + i?86:DYNIX/ptx:4*:*) + echo i386-sequent-sysv4 + exit 0 ;; + i?86:UNIX_SV:4.2MP:2.*) + # Unixware is an offshoot of SVR4, but it has its own version + # number series starting with 2... + # I am not positive that other SVR4 systems won't match this, + # I just have to hope. -- rms. + # Use sysv4.2uw... so that sysv4* matches it. + echo ${UNAME_MACHINE}-pc-sysv4.2uw${UNAME_VERSION} + exit 0 ;; + i?86:*:4.*:* | i?86:SYSTEM_V:4.*:*) + if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then + echo ${UNAME_MACHINE}-univel-sysv${UNAME_RELEASE} + else + echo ${UNAME_MACHINE}-pc-sysv${UNAME_RELEASE} + fi + exit 0 ;; + i?86:*:3.2:*) + if test -f /usr/options/cb.name; then + UNAME_REL=`sed -n 's/.*Version //p' /dev/null >/dev/null ; then + UNAME_REL=`(/bin/uname -X|egrep Release|sed -e 's/.*= //')` + (/bin/uname -X|egrep i80486 >/dev/null) && UNAME_MACHINE=i486 + (/bin/uname -X|egrep '^Machine.*Pentium' >/dev/null) \ + && UNAME_MACHINE=i586 + echo ${UNAME_MACHINE}-pc-sco$UNAME_REL + else + echo ${UNAME_MACHINE}-pc-sysv32 + fi + exit 0 ;; + i?86:UnixWare:*:*) + if /bin/uname -X 2>/dev/null >/dev/null ; then + (/bin/uname -X|egrep '^Machine.*Pentium' >/dev/null) \ + && UNAME_MACHINE=i586 + fi + echo ${UNAME_MACHINE}-unixware-${UNAME_RELEASE}-${UNAME_VERSION} + exit 0 ;; + pc:*:*:*) + # uname -m prints for DJGPP always 'pc', but it prints nothing about + # the processor, so we play safe by assuming i386. + echo i386-pc-msdosdjgpp + exit 0 ;; + Intel:Mach:3*:*) + echo i386-pc-mach3 + exit 0 ;; + paragon:*:*:*) + echo i860-intel-osf1 + exit 0 ;; + i860:*:4.*:*) # i860-SVR4 + if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then + echo i860-stardent-sysv${UNAME_RELEASE} # Stardent Vistra i860-SVR4 + else # Add other i860-SVR4 vendors below as they are discovered. + echo i860-unknown-sysv${UNAME_RELEASE} # Unknown i860-SVR4 + fi + exit 0 ;; + mini*:CTIX:SYS*5:*) + # "miniframe" + echo m68010-convergent-sysv + exit 0 ;; + M68*:*:R3V[567]*:*) + test -r /sysV68 && echo 'm68k-motorola-sysv' && exit 0 ;; + 3[34]??:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 4850:*:4.0:3.0) + OS_REL='' + test -r /etc/.relid \ + && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid` + /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ + && echo i486-ncr-sysv4.3${OS_REL} && exit 0 + /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \ + && echo i586-ncr-sysv4.3${OS_REL} && exit 0 ;; + 3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*) + /bin/uname -p 2>/dev/null | grep 86 >/dev/null \ + && echo i486-ncr-sysv4 && exit 0 ;; + m68*:LynxOS:2.*:*) + echo m68k-unknown-lynxos${UNAME_RELEASE} + exit 0 ;; + mc68030:UNIX_System_V:4.*:*) + echo m68k-atari-sysv4 + exit 0 ;; + i?86:LynxOS:2.*:*) + echo i386-unknown-lynxos${UNAME_RELEASE} + exit 0 ;; + TSUNAMI:LynxOS:2.*:*) + echo sparc-unknown-lynxos${UNAME_RELEASE} + exit 0 ;; + rs6000:LynxOS:2.*:* | PowerPC:LynxOS:2.*:*) + echo rs6000-unknown-lynxos${UNAME_RELEASE} + exit 0 ;; + SM[BE]S:UNIX_SV:*:*) + echo mips-dde-sysv${UNAME_RELEASE} + exit 0 ;; + RM*:SINIX-*:*:*) + echo mips-sni-sysv4 + exit 0 ;; + *:SINIX-*:*:*) + if uname -p 2>/dev/null >/dev/null ; then + UNAME_MACHINE=`(uname -p) 2>/dev/null` + echo ${UNAME_MACHINE}-sni-sysv4 + else + echo ns32k-sni-sysv + fi + exit 0 ;; + PENTIUM:CPunix:4.0*:*) # Unisys `ClearPath HMP IX 4000' SVR4/MP effort + # says + echo i586-unisys-sysv4 + exit 0 ;; + *:UNIX_System_V:4*:FTX*) + # From Gerald Hewes . + # How about differentiating between stratus architectures? -djm + echo hppa1.1-stratus-sysv4 + exit 0 ;; + *:*:*:FTX*) + # From seanf@swdc.stratus.com. + echo i860-stratus-sysv4 + exit 0 ;; + mc68*:A/UX:*:*) + echo m68k-apple-aux${UNAME_RELEASE} + exit 0 ;; + news*:NEWS-OS:*:6*) + echo mips-sony-newsos6 + exit 0 ;; + R3000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R4000:UNIX_SV:*:*) + if [ -d /usr/nec ]; then + echo mips-nec-sysv${UNAME_RELEASE} + else + echo mips-unknown-sysv${UNAME_RELEASE} + fi + exit 0 ;; + BeBox:BeOS:*:*) # BeOS running on hardware made by Be, PPC only. + echo powerpc-be-beos + exit 0 ;; + BeMac:BeOS:*:*) # BeOS running on Mac or Mac clone, PPC only. + echo powerpc-apple-beos + exit 0 ;; + BePC:BeOS:*:*) # BeOS running on Intel PC compatible. + echo i586-pc-beos + exit 0 ;; +esac + +#echo '(No uname command or uname output not recognized.)' 1>&2 +#echo "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" 1>&2 + +cat >dummy.c < +# include +#endif +main () +{ +#if defined (sony) +#if defined (MIPSEB) + /* BFD wants "bsd" instead of "newsos". Perhaps BFD should be changed, + I don't know.... */ + printf ("mips-sony-bsd\n"); exit (0); +#else +#include + printf ("m68k-sony-newsos%s\n", +#ifdef NEWSOS4 + "4" +#else + "" +#endif + ); exit (0); +#endif +#endif + +#if defined (__arm) && defined (__acorn) && defined (__unix) + printf ("arm-acorn-riscix"); exit (0); +#endif + +#if defined (hp300) && !defined (hpux) + printf ("m68k-hp-bsd\n"); exit (0); +#endif + +#if defined (NeXT) +#if !defined (__ARCHITECTURE__) +#define __ARCHITECTURE__ "m68k" +#endif + int version; + version=`(hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 2>/dev/null`; + printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version); + exit (0); +#endif + +#if defined (MULTIMAX) || defined (n16) +#if defined (UMAXV) + printf ("ns32k-encore-sysv\n"); exit (0); +#else +#if defined (CMU) + printf ("ns32k-encore-mach\n"); exit (0); +#else + printf ("ns32k-encore-bsd\n"); exit (0); +#endif +#endif +#endif + +#if defined (__386BSD__) + printf ("i386-pc-bsd\n"); exit (0); +#endif + +#if defined (sequent) +#if defined (i386) + printf ("i386-sequent-dynix\n"); exit (0); +#endif +#if defined (ns32000) + printf ("ns32k-sequent-dynix\n"); exit (0); +#endif +#endif + +#if defined (_SEQUENT_) + struct utsname un; + + uname(&un); + + if (strncmp(un.version, "V2", 2) == 0) { + printf ("i386-sequent-ptx2\n"); exit (0); + } + if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */ + printf ("i386-sequent-ptx1\n"); exit (0); + } + printf ("i386-sequent-ptx\n"); exit (0); + +#endif + +#if defined (vax) +#if !defined (ultrix) + printf ("vax-dec-bsd\n"); exit (0); +#else + printf ("vax-dec-ultrix\n"); exit (0); +#endif +#endif + +#if defined (alliant) && defined (i860) + printf ("i860-alliant-bsd\n"); exit (0); +#endif + + exit (1); +} +EOF + +${CC-cc} dummy.c -o dummy 2>/dev/null && ./dummy && rm dummy.c dummy && exit 0 +rm -f dummy.c dummy + +# Apollos put the system type in the environment. + +test -d /usr/apollo && { echo ${ISP}-apollo-${SYSTYPE}; exit 0; } + +# Convex versions that predate uname can use getsysinfo(1) + +if [ -x /usr/convex/getsysinfo ] +then + case `getsysinfo -f cpu_type` in + c1*) + echo c1-convex-bsd + exit 0 ;; + c2*) + if getsysinfo -f scalar_acc + then echo c32-convex-bsd + else echo c2-convex-bsd + fi + exit 0 ;; + c34*) + echo c34-convex-bsd + exit 0 ;; + c38*) + echo c38-convex-bsd + exit 0 ;; + c4*) + echo c4-convex-bsd + exit 0 ;; + esac +fi + +#echo '(Unable to guess system type)' 1>&2 + +exit 1 diff --git a/libares/config.sub b/libares/config.sub new file mode 100755 index 0000000..00bea6e --- /dev/null +++ b/libares/config.sub @@ -0,0 +1,955 @@ +#! /bin/sh +# Configuration validation subroutine script, version 1.1. +# Copyright (C) 1991, 92-97, 1998 Free Software Foundation, Inc. +# This file is (in principle) common to ALL GNU software. +# The presence of a machine in this file suggests that SOME GNU software +# can handle that machine. It does not imply ALL GNU software can. +# +# This file is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 2 of the License, or +# (at your option) any later version. +# +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with this program; if not, write to the Free Software +# Foundation, Inc., 59 Temple Place - Suite 330, +# Boston, MA 02111-1307, USA. + +# As a special exception to the GNU General Public License, if you +# distribute this file as part of a program that contains a +# configuration script generated by Autoconf, you may include it under +# the same distribution terms that you use for the rest of that program. + +# Configuration subroutine to validate and canonicalize a configuration type. +# Supply the specified configuration type as an argument. +# If it is invalid, we print an error message on stderr and exit with code 1. +# Otherwise, we print the canonical config type on stdout and succeed. + +# This file is supposed to be the same for all GNU packages +# and recognize all the CPU types, system types and aliases +# that are meaningful with *any* GNU software. +# Each package is responsible for reporting which valid configurations +# it does not support. The user should be able to distinguish +# a failure to support a valid configuration from a meaningless +# configuration. + +# The goal of this file is to map all the various variations of a given +# machine specification into a single specification in the form: +# CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM +# or in some cases, the newer four-part form: +# CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM +# It is wrong to echo any other type of specification. + +if [ x$1 = x ] +then + echo Configuration name missing. 1>&2 + echo "Usage: $0 CPU-MFR-OPSYS" 1>&2 + echo "or $0 ALIAS" 1>&2 + echo where ALIAS is a recognized configuration type. 1>&2 + exit 1 +fi + +# First pass through any local machine types. +case $1 in + *local*) + echo $1 + exit 0 + ;; + *) + ;; +esac + +# Separate what the user gave into CPU-COMPANY and OS or KERNEL-OS (if any). +# Here we must recognize all the valid KERNEL-OS combinations. +maybe_os=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'` +case $maybe_os in + linux-gnu*) + os=-$maybe_os + basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'` + ;; + *) + basic_machine=`echo $1 | sed 's/-[^-]*$//'` + if [ $basic_machine != $1 ] + then os=`echo $1 | sed 's/.*-/-/'` + else os=; fi + ;; +esac + +### Let's recognize common machines as not being operating systems so +### that things like config.sub decstation-3100 work. We also +### recognize some manufacturers as not being operating systems, so we +### can provide default operating systems below. +case $os in + -sun*os*) + # Prevent following clause from handling this invalid input. + ;; + -dec* | -mips* | -sequent* | -encore* | -pc532* | -sgi* | -sony* | \ + -att* | -7300* | -3300* | -delta* | -motorola* | -sun[234]* | \ + -unicom* | -ibm* | -next | -hp | -isi* | -apollo | -altos* | \ + -convergent* | -ncr* | -news | -32* | -3600* | -3100* | -hitachi* |\ + -c[123]* | -convex* | -sun | -crds | -omron* | -dg | -ultra | -tti* | \ + -harris | -dolphin | -highlevel | -gould | -cbm | -ns | -masscomp | \ + -apple) + os= + basic_machine=$1 + ;; + -hiux*) + os=-hiuxwe2 + ;; + -sco5) + os=sco3.2v5 + basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + ;; + -sco4) + os=-sco3.2v4 + basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + ;; + -sco3.2.[4-9]*) + os=`echo $os | sed -e 's/sco3.2./sco3.2v/'` + basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + ;; + -sco3.2v[4-9]*) + # Don't forget version if it is 3.2v4 or newer. + basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + ;; + -sco*) + os=-sco3.2v2 + basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + ;; + -isc) + os=-isc2.2 + basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + ;; + -clix*) + basic_machine=clipper-intergraph + ;; + -isc*) + basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'` + ;; + -lynx*) + os=-lynxos + ;; + -ptx*) + basic_machine=`echo $1 | sed -e 's/86-.*/86-sequent/'` + ;; + -windowsnt*) + os=`echo $os | sed -e 's/windowsnt/winnt/'` + ;; + -psos*) + os=-psos + ;; +esac + +# Decode aliases for certain CPU-COMPANY combinations. +case $basic_machine in + # Recognize the basic CPU types without company name. + # Some are omitted here because they have special meanings below. + tahoe | i860 | m32r | m68k | m68000 | m88k | ns32k | arc | arm \ + | arme[lb] | pyramid | mn10200 | mn10300 | tron | a29k \ + | 580 | i960 | h8300 | hppa | hppa1.0 | hppa1.1 | hppa2.0 \ + | alpha | alphaev5 | alphaev56 | we32k | ns16k | clipper \ + | i370 | sh | powerpc | powerpcle | 1750a | dsp16xx | pdp11 \ + | mips64 | mipsel | mips64el | mips64orion | mips64orionel \ + | mipstx39 | mipstx39el \ + | sparc | sparclet | sparclite | sparc64 | v850) + basic_machine=$basic_machine-unknown + ;; + # We use `pc' rather than `unknown' + # because (1) that's what they normally are, and + # (2) the word "unknown" tends to confuse beginning users. + i[34567]86) + basic_machine=$basic_machine-pc + ;; + # Object if more than one company name word. + *-*-*) + echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2 + exit 1 + ;; + # Recognize the basic CPU types with company name. + vax-* | tahoe-* | i[34567]86-* | i860-* | m32r-* | m68k-* | m68000-* \ + | m88k-* | sparc-* | ns32k-* | fx80-* | arc-* | arm-* | c[123]* \ + | mips-* | pyramid-* | tron-* | a29k-* | romp-* | rs6000-* \ + | power-* | none-* | 580-* | cray2-* | h8300-* | i960-* \ + | xmp-* | ymp-* | hppa-* | hppa1.0-* | hppa1.1-* | hppa2.0-* \ + | alpha-* | alphaev5-* | alphaev56-* | we32k-* | cydra-* \ + | ns16k-* | pn-* | np1-* | xps100-* | clipper-* | orion-* \ + | sparclite-* | pdp11-* | sh-* | powerpc-* | powerpcle-* \ + | sparc64-* | mips64-* | mipsel-* \ + | mips64el-* | mips64orion-* | mips64orionel-* \ + | mipstx39-* | mipstx39el-* \ + | f301-*) + ;; + # Recognize the various machine names and aliases which stand + # for a CPU type and a company and sometimes even an OS. + 3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc) + basic_machine=m68000-att + ;; + 3b*) + basic_machine=we32k-att + ;; + alliant | fx80) + basic_machine=fx80-alliant + ;; + altos | altos3068) + basic_machine=m68k-altos + ;; + am29k) + basic_machine=a29k-none + os=-bsd + ;; + amdahl) + basic_machine=580-amdahl + os=-sysv + ;; + amiga | amiga-*) + basic_machine=m68k-cbm + ;; + amigaos | amigados) + basic_machine=m68k-cbm + os=-amigaos + ;; + amigaunix | amix) + basic_machine=m68k-cbm + os=-sysv4 + ;; + apollo68) + basic_machine=m68k-apollo + os=-sysv + ;; + aux) + basic_machine=m68k-apple + os=-aux + ;; + balance) + basic_machine=ns32k-sequent + os=-dynix + ;; + convex-c1) + basic_machine=c1-convex + os=-bsd + ;; + convex-c2) + basic_machine=c2-convex + os=-bsd + ;; + convex-c32) + basic_machine=c32-convex + os=-bsd + ;; + convex-c34) + basic_machine=c34-convex + os=-bsd + ;; + convex-c38) + basic_machine=c38-convex + os=-bsd + ;; + cray | ymp) + basic_machine=ymp-cray + os=-unicos + ;; + cray2) + basic_machine=cray2-cray + os=-unicos + ;; + [ctj]90-cray) + basic_machine=c90-cray + os=-unicos + ;; + crds | unos) + basic_machine=m68k-crds + ;; + da30 | da30-*) + basic_machine=m68k-da30 + ;; + decstation | decstation-3100 | pmax | pmax-* | pmin | dec3100 | decstatn) + basic_machine=mips-dec + ;; + delta | 3300 | motorola-3300 | motorola-delta \ + | 3300-motorola | delta-motorola) + basic_machine=m68k-motorola + ;; + delta88) + basic_machine=m88k-motorola + os=-sysv3 + ;; + dpx20 | dpx20-*) + basic_machine=rs6000-bull + os=-bosx + ;; + dpx2* | dpx2*-bull) + basic_machine=m68k-bull + os=-sysv3 + ;; + ebmon29k) + basic_machine=a29k-amd + os=-ebmon + ;; + elxsi) + basic_machine=elxsi-elxsi + os=-bsd + ;; + encore | umax | mmax) + basic_machine=ns32k-encore + ;; + fx2800) + basic_machine=i860-alliant + ;; + genix) + basic_machine=ns32k-ns + ;; + gmicro) + basic_machine=tron-gmicro + os=-sysv + ;; + h3050r* | hiux*) + basic_machine=hppa1.1-hitachi + os=-hiuxwe2 + ;; + h8300hms) + basic_machine=h8300-hitachi + os=-hms + ;; + harris) + basic_machine=m88k-harris + os=-sysv3 + ;; + hp300-*) + basic_machine=m68k-hp + ;; + hp300bsd) + basic_machine=m68k-hp + os=-bsd + ;; + hp300hpux) + basic_machine=m68k-hp + os=-hpux + ;; + hp9k2[0-9][0-9] | hp9k31[0-9]) + basic_machine=m68000-hp + ;; + hp9k3[2-9][0-9]) + basic_machine=m68k-hp + ;; + hp9k7[0-9][0-9] | hp7[0-9][0-9] | hp9k8[0-9]7 | hp8[0-9]7) + basic_machine=hppa1.1-hp + ;; + hp9k8[0-9][0-9] | hp8[0-9][0-9]) + basic_machine=hppa1.0-hp + ;; + hppa-next) + os=-nextstep3 + ;; + i370-ibm* | ibm*) + basic_machine=i370-ibm + os=-mvs + ;; +# I'm not sure what "Sysv32" means. Should this be sysv3.2? + i[34567]86v32) + basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'` + os=-sysv32 + ;; + i[34567]86v4*) + basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'` + os=-sysv4 + ;; + i[34567]86v) + basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'` + os=-sysv + ;; + i[34567]86sol2) + basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'` + os=-solaris2 + ;; + iris | iris4d) + basic_machine=mips-sgi + case $os in + -irix*) + ;; + *) + os=-irix4 + ;; + esac + ;; + isi68 | isi) + basic_machine=m68k-isi + os=-sysv + ;; + m88k-omron*) + basic_machine=m88k-omron + ;; + magnum | m3230) + basic_machine=mips-mips + os=-sysv + ;; + merlin) + basic_machine=ns32k-utek + os=-sysv + ;; + miniframe) + basic_machine=m68000-convergent + ;; + mipsel*-linux*) + basic_machine=mipsel-unknown + os=-linux-gnu + ;; + mips*-linux*) + basic_machine=mips-unknown + os=-linux-gnu + ;; + mips3*-*) + basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'` + ;; + mips3*) + basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`-unknown + ;; + ncr3000) + basic_machine=i486-ncr + os=-sysv4 + ;; + news | news700 | news800 | news900) + basic_machine=m68k-sony + os=-newsos + ;; + news1000) + basic_machine=m68030-sony + os=-newsos + ;; + news-3600 | risc-news) + basic_machine=mips-sony + os=-newsos + ;; + next | m*-next ) + basic_machine=m68k-next + case $os in + -nextstep* ) + ;; + -ns2*) + os=-nextstep2 + ;; + *) + os=-nextstep3 + ;; + esac + ;; + nh3000) + basic_machine=m68k-harris + os=-cxux + ;; + nh[45]000) + basic_machine=m88k-harris + os=-cxux + ;; + nindy960) + basic_machine=i960-intel + os=-nindy + ;; + np1) + basic_machine=np1-gould + ;; + pa-hitachi) + basic_machine=hppa1.1-hitachi + os=-hiuxwe2 + ;; + paragon) + basic_machine=i860-intel + os=-osf + ;; + pbd) + basic_machine=sparc-tti + ;; + pbb) + basic_machine=m68k-tti + ;; + pc532 | pc532-*) + basic_machine=ns32k-pc532 + ;; + pentium | p5 | k5 | nexen) + basic_machine=i586-pc + ;; + pentiumpro | p6 | k6 | 6x86) + basic_machine=i686-pc + ;; + pentiumii | pentium2) + basic_machine=i786-pc + ;; + pentium-* | p5-* | k5-* | nexen-*) + basic_machine=i586-`echo $basic_machine | sed 's/^[^-]*-//'` + ;; + pentiumpro-* | p6-* | k6-* | 6x86-*) + basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'` + ;; + pentiumii-* | pentium2-*) + basic_machine=i786-`echo $basic_machine | sed 's/^[^-]*-//'` + ;; + pn) + basic_machine=pn-gould + ;; + power) basic_machine=rs6000-ibm + ;; + ppc) basic_machine=powerpc-unknown + ;; + ppc-*) basic_machine=powerpc-`echo $basic_machine | sed 's/^[^-]*-//'` + ;; + ppcle | powerpclittle | ppc-le | powerpc-little) + basic_machine=powerpcle-unknown + ;; + ppcle-* | powerpclittle-*) + basic_machine=powerpcle-`echo $basic_machine | sed 's/^[^-]*-//'` + ;; + ps2) + basic_machine=i386-ibm + ;; + rm[46]00) + basic_machine=mips-siemens + ;; + rtpc | rtpc-*) + basic_machine=romp-ibm + ;; + sequent) + basic_machine=i386-sequent + ;; + sh) + basic_machine=sh-hitachi + os=-hms + ;; + sps7) + basic_machine=m68k-bull + os=-sysv2 + ;; + spur) + basic_machine=spur-unknown + ;; + sun2) + basic_machine=m68000-sun + ;; + sun2os3) + basic_machine=m68000-sun + os=-sunos3 + ;; + sun2os4) + basic_machine=m68000-sun + os=-sunos4 + ;; + sun3os3) + basic_machine=m68k-sun + os=-sunos3 + ;; + sun3os4) + basic_machine=m68k-sun + os=-sunos4 + ;; + sun4os3) + basic_machine=sparc-sun + os=-sunos3 + ;; + sun4os4) + basic_machine=sparc-sun + os=-sunos4 + ;; + sun4sol2) + basic_machine=sparc-sun + os=-solaris2 + ;; + sun3 | sun3-*) + basic_machine=m68k-sun + ;; + sun4) + basic_machine=sparc-sun + ;; + sun386 | sun386i | roadrunner) + basic_machine=i386-sun + ;; + symmetry) + basic_machine=i386-sequent + os=-dynix + ;; + tx39) + basic_machine=mipstx39-unknown + ;; + tx39el) + basic_machine=mipstx39el-unknown + ;; + tower | tower-32) + basic_machine=m68k-ncr + ;; + udi29k) + basic_machine=a29k-amd + os=-udi + ;; + ultra3) + basic_machine=a29k-nyu + os=-sym1 + ;; + vaxv) + basic_machine=vax-dec + os=-sysv + ;; + vms) + basic_machine=vax-dec + os=-vms + ;; + vpp*|vx|vx-*) + basic_machine=f301-fujitsu + ;; + vxworks960) + basic_machine=i960-wrs + os=-vxworks + ;; + vxworks68) + basic_machine=m68k-wrs + os=-vxworks + ;; + vxworks29k) + basic_machine=a29k-wrs + os=-vxworks + ;; + xmp) + basic_machine=xmp-cray + os=-unicos + ;; + xps | xps100) + basic_machine=xps100-honeywell + ;; + none) + basic_machine=none-none + os=-none + ;; + +# Here we handle the default manufacturer of certain CPU types. It is in +# some cases the only manufacturer, in others, it is the most popular. + mips) + if [ x$os = x-linux-gnu ]; then + basic_machine=mips-unknown + else + basic_machine=mips-mips + fi + ;; + romp) + basic_machine=romp-ibm + ;; + rs6000) + basic_machine=rs6000-ibm + ;; + vax) + basic_machine=vax-dec + ;; + pdp11) + basic_machine=pdp11-dec + ;; + we32k) + basic_machine=we32k-att + ;; + sparc) + basic_machine=sparc-sun + ;; + cydra) + basic_machine=cydra-cydrome + ;; + orion) + basic_machine=orion-highlevel + ;; + orion105) + basic_machine=clipper-highlevel + ;; + *) + echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2 + exit 1 + ;; +esac + +# Here we canonicalize certain aliases for manufacturers. +case $basic_machine in + *-digital*) + basic_machine=`echo $basic_machine | sed 's/digital.*/dec/'` + ;; + *-commodore*) + basic_machine=`echo $basic_machine | sed 's/commodore.*/cbm/'` + ;; + *) + ;; +esac + +# Decode manufacturer-specific aliases for certain operating systems. + +if [ x"$os" != x"" ] +then +case $os in + # First match some system type aliases + # that might get confused with valid system types. + # -solaris* is a basic system type, with this one exception. + -solaris1 | -solaris1.*) + os=`echo $os | sed -e 's|solaris1|sunos4|'` + ;; + -solaris) + os=-solaris2 + ;; + -svr4*) + os=-sysv4 + ;; + -unixware*) + os=-sysv4.2uw + ;; + -gnu/linux*) + os=`echo $os | sed -e 's|gnu/linux|linux-gnu|'` + ;; + # First accept the basic system types. + # The portable systems comes first. + # Each alternative MUST END IN A *, to match a version number. + # -sysv* is not here because it comes later, after sysvr4. + -gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \ + | -*vms* | -sco* | -esix* | -isc* | -aix* | -sunos | -sunos[34]*\ + | -hpux* | -unos* | -osf* | -luna* | -dgux* | -solaris* | -sym* \ + | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \ + | -aos* \ + | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \ + | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \ + | -hiux* | -386bsd* | -netbsd* | -openbsd* | -freebsd* | -riscix* \ + | -lynxos* | -bosx* | -nextstep* | -cxux* | -aout* | -elf* \ + | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \ + | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \ + | -cygwin* | -pe* | -psos* | -moss* | -proelf* | -rtems* \ + | -mingw32* | -linux-gnu* | -uxpv* | -beos*) + # Remember, each alternative MUST END IN *, to match a version number. + ;; + -linux*) + os=`echo $os | sed -e 's|linux|linux-gnu|'` + ;; + -sunos5*) + os=`echo $os | sed -e 's|sunos5|solaris2|'` + ;; + -sunos6*) + os=`echo $os | sed -e 's|sunos6|solaris3|'` + ;; + -osfrose*) + os=-osfrose + ;; + -osf*) + os=-osf + ;; + -utek*) + os=-bsd + ;; + -dynix*) + os=-bsd + ;; + -acis*) + os=-aos + ;; + -ctix* | -uts*) + os=-sysv + ;; + -ns2 ) + os=-nextstep2 + ;; + # Preserve the version number of sinix5. + -sinix5.*) + os=`echo $os | sed -e 's|sinix|sysv|'` + ;; + -sinix*) + os=-sysv4 + ;; + -triton*) + os=-sysv3 + ;; + -oss*) + os=-sysv3 + ;; + -svr4) + os=-sysv4 + ;; + -svr3) + os=-sysv3 + ;; + -sysvr4) + os=-sysv4 + ;; + # This must come after -sysvr4. + -sysv*) + ;; + -xenix) + os=-xenix + ;; + -none) + ;; + *) + # Get rid of the `-' at the beginning of $os. + os=`echo $os | sed 's/[^-]*-//'` + echo Invalid configuration \`$1\': system \`$os\' not recognized 1>&2 + exit 1 + ;; +esac +else + +# Here we handle the default operating systems that come with various machines. +# The value should be what the vendor currently ships out the door with their +# machine or put another way, the most popular os provided with the machine. + +# Note that if you're going to try to match "-MANUFACTURER" here (say, +# "-sun"), then you have to tell the case statement up towards the top +# that MANUFACTURER isn't an operating system. Otherwise, code above +# will signal an error saying that MANUFACTURER isn't an operating +# system, and we'll never get to this point. + +case $basic_machine in + *-acorn) + os=-riscix1.2 + ;; + arm*-semi) + os=-aout + ;; + pdp11-*) + os=-none + ;; + *-dec | vax-*) + os=-ultrix4.2 + ;; + m68*-apollo) + os=-domain + ;; + i386-sun) + os=-sunos4.0.2 + ;; + m68000-sun) + os=-sunos3 + # This also exists in the configure program, but was not the + # default. + # os=-sunos4 + ;; + *-tti) # must be before sparc entry or we get the wrong os. + os=-sysv3 + ;; + sparc-* | *-sun) + os=-sunos4.1.1 + ;; + *-be) + os=-beos + ;; + *-ibm) + os=-aix + ;; + *-hp) + os=-hpux + ;; + *-hitachi) + os=-hiux + ;; + i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent) + os=-sysv + ;; + *-cbm) + os=-amigaos + ;; + *-dg) + os=-dgux + ;; + *-dolphin) + os=-sysv3 + ;; + m68k-ccur) + os=-rtu + ;; + m88k-omron*) + os=-luna + ;; + *-next ) + os=-nextstep + ;; + *-sequent) + os=-ptx + ;; + *-crds) + os=-unos + ;; + *-ns) + os=-genix + ;; + i370-*) + os=-mvs + ;; + *-next) + os=-nextstep3 + ;; + *-gould) + os=-sysv + ;; + *-highlevel) + os=-bsd + ;; + *-encore) + os=-bsd + ;; + *-sgi) + os=-irix + ;; + *-siemens) + os=-sysv4 + ;; + *-masscomp) + os=-rtu + ;; + f301-fujitsu) + os=-uxpv + ;; + *) + os=-none + ;; +esac +fi + +# Here we handle the case where we know the os, and the CPU type, but not the +# manufacturer. We pick the logical manufacturer. +vendor=unknown +case $basic_machine in + *-unknown) + case $os in + -riscix*) + vendor=acorn + ;; + -sunos*) + vendor=sun + ;; + -aix*) + vendor=ibm + ;; + -hpux*) + vendor=hp + ;; + -hiux*) + vendor=hitachi + ;; + -unos*) + vendor=crds + ;; + -dgux*) + vendor=dg + ;; + -luna*) + vendor=omron + ;; + -genix*) + vendor=ns + ;; + -mvs*) + vendor=ibm + ;; + -ptx*) + vendor=sequent + ;; + -vxsim* | -vxworks*) + vendor=wrs + ;; + -aux*) + vendor=apple + ;; + esac + basic_machine=`echo $basic_machine | sed "s/unknown/$vendor/"` + ;; +esac + +echo $basic_machine$os diff --git a/libares/configure b/libares/configure new file mode 100755 index 0000000..e15faf6 --- /dev/null +++ b/libares/configure @@ -0,0 +1,1288 @@ +#! /bin/sh + +# Guess values for system-dependent variables and create Makefiles. +# Generated automatically using autoconf version 2.13 +# Copyright (C) 1992, 93, 94, 95, 96 Free Software Foundation, Inc. +# +# This configure script is free software; the Free Software Foundation +# gives unlimited permission to copy, distribute and modify it. + +# Defaults: +ac_help= +ac_default_prefix=/usr/local +# Any additions from configure.in: + +# Initialize some variables set by options. +# The variables have the same names as the options, with +# dashes changed to underlines. +build=NONE +cache_file=./config.cache +exec_prefix=NONE +host=NONE +no_create= +nonopt=NONE +no_recursion= +prefix=NONE +program_prefix=NONE +program_suffix=NONE +program_transform_name=s,x,x, +silent= +site= +srcdir= +target=NONE +verbose= +x_includes=NONE +x_libraries=NONE +bindir='${exec_prefix}/bin' +sbindir='${exec_prefix}/sbin' +libexecdir='${exec_prefix}/libexec' +datadir='${prefix}/share' +sysconfdir='${prefix}/etc' +sharedstatedir='${prefix}/com' +localstatedir='${prefix}/var' +libdir='${exec_prefix}/lib' +includedir='${prefix}/include' +oldincludedir='/usr/include' +infodir='${prefix}/info' +mandir='${prefix}/man' + +# Initialize some other variables. +subdirs= +MFLAGS= MAKEFLAGS= +SHELL=${CONFIG_SHELL-/bin/sh} +# Maximum number of lines to put in a shell here document. +ac_max_here_lines=12 + +ac_prev= +for ac_option +do + + # If the previous option needs an argument, assign it. + if test -n "$ac_prev"; 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then + echo "--enable and --with options recognized:$ac_help" + fi + exit 0 ;; + + -host | --host | --hos | --ho) + ac_prev=host ;; + -host=* | --host=* | --hos=* | --ho=*) + host="$ac_optarg" ;; + + -includedir | --includedir | --includedi | --included | --include \ + | --includ | --inclu | --incl | --inc) + ac_prev=includedir ;; + -includedir=* | --includedir=* | --includedi=* | --included=* | --include=* \ + | --includ=* | --inclu=* | --incl=* | --inc=*) + includedir="$ac_optarg" ;; + + -infodir | --infodir | --infodi | --infod | --info | --inf) + ac_prev=infodir ;; + -infodir=* | --infodir=* | --infodi=* | --infod=* | --info=* | --inf=*) + infodir="$ac_optarg" ;; + + -libdir | --libdir | --libdi | --libd) + ac_prev=libdir ;; + -libdir=* | --libdir=* | --libdi=* | --libd=*) + libdir="$ac_optarg" ;; + + -libexecdir | --libexecdir | --libexecdi | --libexecd | --libexec \ + | --libexe | --libex | --libe) + ac_prev=libexecdir ;; + -libexecdir=* | --libexecdir=* | --libexecdi=* | --libexecd=* | --libexec=* \ + | --libexe=* | --libex=* | --libe=*) + libexecdir="$ac_optarg" ;; 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+ -oldincludedir=* | --oldincludedir=* | --oldincludedi=* | --oldincluded=* \ + | --oldinclude=* | --oldinclud=* | --oldinclu=* | --oldincl=* | --oldinc=* \ + | --oldin=* | --oldi=* | --old=* | --ol=* | --o=*) + oldincludedir="$ac_optarg" ;; + + -prefix | --prefix | --prefi | --pref | --pre | --pr | --p) + ac_prev=prefix ;; + -prefix=* | --prefix=* | --prefi=* | --pref=* | --pre=* | --pr=* | --p=*) + prefix="$ac_optarg" ;; + + -program-prefix | --program-prefix | --program-prefi | --program-pref \ + | --program-pre | --program-pr | --program-p) + ac_prev=program_prefix ;; + -program-prefix=* | --program-prefix=* | --program-prefi=* \ + | --program-pref=* | --program-pre=* | --program-pr=* | --program-p=*) + program_prefix="$ac_optarg" ;; + + -program-suffix | --program-suffix | --program-suffi | --program-suff \ + | --program-suf | --program-su | --program-s) + ac_prev=program_suffix ;; + -program-suffix=* | --program-suffix=* | --program-suffi=* \ + | --program-suff=* | --program-suf=* | --program-su=* | --program-s=*) + program_suffix="$ac_optarg" ;; + + -program-transform-name | --program-transform-name \ + | --program-transform-nam | --program-transform-na \ + | --program-transform-n | --program-transform- \ + | --program-transform | --program-transfor \ + | --program-transfo | --program-transf \ + | --program-trans | --program-tran \ + | --progr-tra | --program-tr | --program-t) + ac_prev=program_transform_name ;; + -program-transform-name=* | --program-transform-name=* \ + | --program-transform-nam=* | --program-transform-na=* \ + | --program-transform-n=* | --program-transform-=* \ + | --program-transform=* | --program-transfor=* \ + | --program-transfo=* | --program-transf=* \ + | --program-trans=* | --program-tran=* \ + | --progr-tra=* | --program-tr=* | --program-t=*) + program_transform_name="$ac_optarg" ;; + + -q | -quiet | --quiet | --quie | --qui | --qu | --q \ + | -silent | --silent | --silen | --sile | --sil) + silent=yes ;; + + -sbindir | --sbindir | --sbindi | --sbind | --sbin | --sbi | --sb) + ac_prev=sbindir ;; + -sbindir=* | --sbindir=* | --sbindi=* | --sbind=* | --sbin=* \ + | --sbi=* | --sb=*) + sbindir="$ac_optarg" ;; + + -sharedstatedir | --sharedstatedir | --sharedstatedi \ + | --sharedstated | --sharedstate | --sharedstat | --sharedsta \ + | --sharedst | --shareds | --shared | --share | --shar \ + | --sha | --sh) + ac_prev=sharedstatedir ;; + -sharedstatedir=* | --sharedstatedir=* | --sharedstatedi=* \ + | --sharedstated=* | --sharedstate=* | --sharedstat=* | --sharedsta=* \ + | --sharedst=* | --shareds=* | --shared=* | --share=* | --shar=* \ + | --sha=* | --sh=*) + sharedstatedir="$ac_optarg" ;; + + -site | --site | --sit) + ac_prev=site ;; + -site=* | --site=* | --sit=*) + site="$ac_optarg" ;; + + -srcdir | --srcdir | --srcdi | --srcd | --src | --sr) + ac_prev=srcdir ;; + -srcdir=* | --srcdir=* | --srcdi=* | --srcd=* | --src=* | --sr=*) + srcdir="$ac_optarg" ;; + + -sysconfdir | --sysconfdir | --sysconfdi | --sysconfd | --sysconf \ + | --syscon | --sysco | --sysc | --sys | --sy) + ac_prev=sysconfdir ;; + -sysconfdir=* | --sysconfdir=* | --sysconfdi=* | --sysconfd=* | --sysconf=* \ + | --syscon=* | --sysco=* | --sysc=* | --sys=* | --sy=*) + sysconfdir="$ac_optarg" ;; + + -target | --target | --targe | --targ | --tar | --ta | --t) + ac_prev=target ;; + -target=* | --target=* | --targe=* | --targ=* | --tar=* | --ta=* | --t=*) + target="$ac_optarg" ;; + + -v | -verbose | --verbose | --verbos | --verbo | --verb) + verbose=yes ;; + + -version | --version | --versio | --versi | --vers) + echo "configure generated by autoconf version 2.13" + exit 0 ;; + + -with-* | --with-*) + ac_package=`echo $ac_option|sed -e 's/-*with-//' -e 's/=.*//'` + # Reject names that are not valid shell variable names. + if test -n "`echo $ac_package| sed 's/[-_a-zA-Z0-9]//g'`"; then + { echo "configure: error: $ac_package: invalid package name" 1>&2; exit 1; } + fi + ac_package=`echo $ac_package| sed 's/-/_/g'` + case "$ac_option" in + *=*) ;; + *) ac_optarg=yes ;; + esac + eval "with_${ac_package}='$ac_optarg'" ;; + + -without-* | --without-*) + ac_package=`echo $ac_option|sed -e 's/-*without-//'` + # Reject names that are not valid shell variable names. + if test -n "`echo $ac_package| sed 's/[-a-zA-Z0-9_]//g'`"; then + { echo "configure: error: $ac_package: invalid package name" 1>&2; exit 1; } + fi + ac_package=`echo $ac_package| sed 's/-/_/g'` + eval "with_${ac_package}=no" ;; + + --x) + # Obsolete; use --with-x. + with_x=yes ;; + + -x-includes | --x-includes | --x-include | --x-includ | --x-inclu \ + | --x-incl | --x-inc | --x-in | --x-i) + ac_prev=x_includes ;; + -x-includes=* | --x-includes=* | --x-include=* | --x-includ=* | --x-inclu=* \ + | --x-incl=* | --x-inc=* | --x-in=* | --x-i=*) + x_includes="$ac_optarg" ;; + + -x-libraries | --x-libraries | --x-librarie | --x-librari \ + | --x-librar | --x-libra | --x-libr | --x-lib | --x-li | --x-l) + ac_prev=x_libraries ;; + -x-libraries=* | --x-libraries=* | --x-librarie=* | --x-librari=* \ + | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*) + x_libraries="$ac_optarg" ;; + + -*) { echo "configure: error: $ac_option: invalid option; use --help to show usage" 1>&2; exit 1; } + ;; + + *) + if test -n "`echo $ac_option| sed 's/[-a-z0-9.]//g'`"; then + echo "configure: warning: $ac_option: invalid host type" 1>&2 + fi + if test "x$nonopt" != xNONE; then + { echo "configure: error: can only configure for one host and one target at a time" 1>&2; exit 1; } + fi + nonopt="$ac_option" + ;; + + esac +done + +if test -n "$ac_prev"; then + { echo "configure: error: missing argument to --`echo $ac_prev | sed 's/_/-/g'`" 1>&2; exit 1; } +fi + +trap 'rm -fr conftest* confdefs* core core.* *.core $ac_clean_files; exit 1' 1 2 15 + +# File descriptor usage: +# 0 standard input +# 1 file creation +# 2 errors and warnings +# 3 some systems may open it to /dev/tty +# 4 used on the Kubota Titan +# 6 checking for... messages and results +# 5 compiler messages saved in config.log +if test "$silent" = yes; then + exec 6>/dev/null +else + exec 6>&1 +fi +exec 5>./config.log + +echo "\ +This file contains any messages produced by compilers while +running configure, to aid debugging if configure makes a mistake. +" 1>&5 + +# Strip out --no-create and --no-recursion so they do not pile up. +# Also quote any args containing shell metacharacters. +ac_configure_args= +for ac_arg +do + case "$ac_arg" in + -no-create | --no-create | --no-creat | --no-crea | --no-cre \ + | --no-cr | --no-c) ;; + -no-recursion | --no-recursion | --no-recursio | --no-recursi \ + | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r) ;; + *" "*|*" "*|*[\[\]\~\#\$\^\&\*\(\)\{\}\\\|\;\<\>\?]*) + ac_configure_args="$ac_configure_args '$ac_arg'" ;; + *) ac_configure_args="$ac_configure_args $ac_arg" ;; + esac +done + +# NLS nuisances. +# Only set these to C if already set. These must not be set unconditionally +# because not all systems understand e.g. LANG=C (notably SCO). +# Fixing LC_MESSAGES prevents Solaris sh from translating var values in `set'! +# Non-C LC_CTYPE values break the ctype check. +if test "${LANG+set}" = set; then LANG=C; export LANG; fi +if test "${LC_ALL+set}" = set; then LC_ALL=C; export LC_ALL; fi +if test "${LC_MESSAGES+set}" = set; then LC_MESSAGES=C; export LC_MESSAGES; fi +if test "${LC_CTYPE+set}" = set; then LC_CTYPE=C; export LC_CTYPE; fi + +# confdefs.h avoids OS command line length limits that DEFS can exceed. +rm -rf conftest* confdefs.h +# AIX cpp loses on an empty file, so make sure it contains at least a newline. +echo > confdefs.h + +# A filename unique to this package, relative to the directory that +# configure is in, which we can look for to find out if srcdir is correct. +ac_unique_file=ares_init.c + +# Find the source files, if location was not specified. +if test -z "$srcdir"; then + ac_srcdir_defaulted=yes + # Try the directory containing this script, then its parent. + ac_prog=$0 + ac_confdir=`echo $ac_prog|sed 's%/[^/][^/]*$%%'` + test "x$ac_confdir" = "x$ac_prog" && ac_confdir=. + srcdir=$ac_confdir + if test ! -r $srcdir/$ac_unique_file; then + srcdir=.. + fi +else + ac_srcdir_defaulted=no +fi +if test ! -r $srcdir/$ac_unique_file; then + if test "$ac_srcdir_defaulted" = yes; then + { echo "configure: error: can not find sources in $ac_confdir or .." 1>&2; exit 1; } + else + { echo "configure: error: can not find sources in $srcdir" 1>&2; exit 1; } + fi +fi +srcdir=`echo "${srcdir}" | sed 's%\([^/]\)/*$%\1%'` + +# Prefer explicitly selected file to automatically selected ones. +if test -z "$CONFIG_SITE"; then + if test "x$prefix" != xNONE; then + CONFIG_SITE="$prefix/share/config.site $prefix/etc/config.site" + else + CONFIG_SITE="$ac_default_prefix/share/config.site $ac_default_prefix/etc/config.site" + fi +fi +for ac_site_file in $CONFIG_SITE; do + if test -r "$ac_site_file"; then + echo "loading site script $ac_site_file" + . "$ac_site_file" + fi +done + +if test -r "$cache_file"; then + echo "loading cache $cache_file" + . $cache_file +else + echo "creating cache $cache_file" + > $cache_file +fi + +ac_ext=c +# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options. +ac_cpp='$CPP $CPPFLAGS' +ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5' +ac_link='${CC-cc} -o conftest${ac_exeext} $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5' +cross_compiling=$ac_cv_prog_cc_cross + +ac_exeext= +ac_objext=o +if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then + # Stardent Vistra SVR4 grep lacks -e, says ghazi@caip.rutgers.edu. + if (echo -n testing; echo 1,2,3) | sed s/-n/xn/ | grep xn >/dev/null; then + ac_n= ac_c=' +' ac_t=' ' + else + ac_n=-n ac_c= ac_t= + fi +else + ac_n= ac_c='\c' ac_t= +fi + + + +# Extract the first word of "gcc", so it can be a program name with args. +set dummy gcc; ac_word=$2 +echo $ac_n "checking for $ac_word""... $ac_c" 1>&6 +echo "configure:529: checking for $ac_word" >&5 +if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else + IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS=":" + ac_dummy="$PATH" + for ac_dir in $ac_dummy; do + test -z "$ac_dir" && ac_dir=. + if test -f $ac_dir/$ac_word; then + ac_cv_prog_CC="gcc" + break + fi + done + IFS="$ac_save_ifs" +fi +fi +CC="$ac_cv_prog_CC" +if test -n "$CC"; then + echo "$ac_t""$CC" 1>&6 +else + echo "$ac_t""no" 1>&6 +fi + +if test -z "$CC"; then + # Extract the first word of "cc", so it can be a program name with args. +set dummy cc; ac_word=$2 +echo $ac_n "checking for $ac_word""... $ac_c" 1>&6 +echo "configure:559: checking for $ac_word" >&5 +if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else + IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS=":" + ac_prog_rejected=no + ac_dummy="$PATH" + for ac_dir in $ac_dummy; do + test -z "$ac_dir" && ac_dir=. + if test -f $ac_dir/$ac_word; then + if test "$ac_dir/$ac_word" = "/usr/ucb/cc"; then + ac_prog_rejected=yes + continue + fi + ac_cv_prog_CC="cc" + break + fi + done + IFS="$ac_save_ifs" +if test $ac_prog_rejected = yes; then + # We found a bogon in the path, so make sure we never use it. + set dummy $ac_cv_prog_CC + shift + if test $# -gt 0; then + # We chose a different compiler from the bogus one. + # However, it has the same basename, so the bogon will be chosen + # first if we set CC to just the basename; use the full file name. + shift + set dummy "$ac_dir/$ac_word" "$@" + shift + ac_cv_prog_CC="$@" + fi +fi +fi +fi +CC="$ac_cv_prog_CC" +if test -n "$CC"; then + echo "$ac_t""$CC" 1>&6 +else + echo "$ac_t""no" 1>&6 +fi + + if test -z "$CC"; then + case "`uname -s`" in + *win32* | *WIN32*) + # Extract the first word of "cl", so it can be a program name with args. +set dummy cl; ac_word=$2 +echo $ac_n "checking for $ac_word""... $ac_c" 1>&6 +echo "configure:610: checking for $ac_word" >&5 +if eval "test \"`echo '$''{'ac_cv_prog_CC'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + if test -n "$CC"; then + ac_cv_prog_CC="$CC" # Let the user override the test. +else + IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS=":" + ac_dummy="$PATH" + for ac_dir in $ac_dummy; do + test -z "$ac_dir" && ac_dir=. + if test -f $ac_dir/$ac_word; then + ac_cv_prog_CC="cl" + break + fi + done + IFS="$ac_save_ifs" +fi +fi +CC="$ac_cv_prog_CC" +if test -n "$CC"; then + echo "$ac_t""$CC" 1>&6 +else + echo "$ac_t""no" 1>&6 +fi + ;; + esac + fi + test -z "$CC" && { echo "configure: error: no acceptable cc found in \$PATH" 1>&2; exit 1; } +fi + +echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works""... $ac_c" 1>&6 +echo "configure:642: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) works" >&5 + +ac_ext=c +# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options. +ac_cpp='$CPP $CPPFLAGS' +ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5' +ac_link='${CC-cc} -o conftest${ac_exeext} $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5' +cross_compiling=$ac_cv_prog_cc_cross + +cat > conftest.$ac_ext << EOF + +#line 653 "configure" +#include "confdefs.h" + +main(){return(0);} +EOF +if { (eval echo configure:658: \"$ac_link\") 1>&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then + ac_cv_prog_cc_works=yes + # If we can't run a trivial program, we are probably using a cross compiler. + if (./conftest; exit) 2>/dev/null; then + ac_cv_prog_cc_cross=no + else + ac_cv_prog_cc_cross=yes + fi +else + echo "configure: failed program was:" >&5 + cat conftest.$ac_ext >&5 + ac_cv_prog_cc_works=no +fi +rm -fr conftest* +ac_ext=c +# CFLAGS is not in ac_cpp because -g, -O, etc. are not valid cpp options. +ac_cpp='$CPP $CPPFLAGS' +ac_compile='${CC-cc} -c $CFLAGS $CPPFLAGS conftest.$ac_ext 1>&5' +ac_link='${CC-cc} -o conftest${ac_exeext} $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $LIBS 1>&5' +cross_compiling=$ac_cv_prog_cc_cross + +echo "$ac_t""$ac_cv_prog_cc_works" 1>&6 +if test $ac_cv_prog_cc_works = no; then + { echo "configure: error: installation or configuration problem: C compiler cannot create executables." 1>&2; exit 1; } +fi +echo $ac_n "checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler""... $ac_c" 1>&6 +echo "configure:684: checking whether the C compiler ($CC $CFLAGS $LDFLAGS) is a cross-compiler" >&5 +echo "$ac_t""$ac_cv_prog_cc_cross" 1>&6 +cross_compiling=$ac_cv_prog_cc_cross + +echo $ac_n "checking whether we are using GNU C""... $ac_c" 1>&6 +echo "configure:689: checking whether we are using GNU C" >&5 +if eval "test \"`echo '$''{'ac_cv_prog_gcc'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + cat > conftest.c <&5; (eval $ac_try) 2>&5; }; } | egrep yes >/dev/null 2>&1; then + ac_cv_prog_gcc=yes +else + ac_cv_prog_gcc=no +fi +fi + +echo "$ac_t""$ac_cv_prog_gcc" 1>&6 + +if test $ac_cv_prog_gcc = yes; then + GCC=yes +else + GCC= +fi + +ac_test_CFLAGS="${CFLAGS+set}" +ac_save_CFLAGS="$CFLAGS" +CFLAGS= +echo $ac_n "checking whether ${CC-cc} accepts -g""... $ac_c" 1>&6 +echo "configure:717: checking whether ${CC-cc} accepts -g" >&5 +if eval "test \"`echo '$''{'ac_cv_prog_cc_g'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + echo 'void f(){}' > conftest.c +if test -z "`${CC-cc} -g -c conftest.c 2>&1`"; then + ac_cv_prog_cc_g=yes +else + ac_cv_prog_cc_g=no +fi +rm -f conftest* + +fi + +echo "$ac_t""$ac_cv_prog_cc_g" 1>&6 +if test "$ac_test_CFLAGS" = set; then + CFLAGS="$ac_save_CFLAGS" +elif test $ac_cv_prog_cc_g = yes; then + if test "$GCC" = yes; then + CFLAGS="-g -O2" + else + CFLAGS="-g" + fi +else + if test "$GCC" = yes; then + CFLAGS="-O2" + else + CFLAGS= + fi +fi + +ac_aux_dir= +for ac_dir in $srcdir $srcdir/.. $srcdir/../..; do + if test -f $ac_dir/install-sh; then + ac_aux_dir=$ac_dir + ac_install_sh="$ac_aux_dir/install-sh -c" + break + elif test -f $ac_dir/install.sh; then + ac_aux_dir=$ac_dir + ac_install_sh="$ac_aux_dir/install.sh -c" + break + fi +done +if test -z "$ac_aux_dir"; then + { echo "configure: error: can not find install-sh or install.sh in $srcdir $srcdir/.. $srcdir/../.." 1>&2; exit 1; } +fi +ac_config_guess=$ac_aux_dir/config.guess +ac_config_sub=$ac_aux_dir/config.sub +ac_configure=$ac_aux_dir/configure # This should be Cygnus configure. + +# Find a good install program. We prefer a C program (faster), +# so one script is as good as another. But avoid the broken or +# incompatible versions: +# SysV /etc/install, /usr/sbin/install +# SunOS /usr/etc/install +# IRIX /sbin/install +# AIX /bin/install +# AIX 4 /usr/bin/installbsd, which doesn't work without a -g flag +# AFS /usr/afsws/bin/install, which mishandles nonexistent args +# SVR4 /usr/ucb/install, which tries to use the nonexistent group "staff" +# ./install, which can be erroneously created by make from ./install.sh. +echo $ac_n "checking for a BSD compatible install""... $ac_c" 1>&6 +echo "configure:779: checking for a BSD compatible install" >&5 +if test -z "$INSTALL"; then +if eval "test \"`echo '$''{'ac_cv_path_install'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + IFS="${IFS= }"; ac_save_IFS="$IFS"; IFS=":" + for ac_dir in $PATH; do + # Account for people who put trailing slashes in PATH elements. + case "$ac_dir/" in + /|./|.//|/etc/*|/usr/sbin/*|/usr/etc/*|/sbin/*|/usr/afsws/bin/*|/usr/ucb/*) ;; + *) + # OSF1 and SCO ODT 3.0 have their own names for install. + # Don't use installbsd from OSF since it installs stuff as root + # by default. + for ac_prog in ginstall scoinst install; do + if test -f $ac_dir/$ac_prog; then + if test $ac_prog = install && + grep dspmsg $ac_dir/$ac_prog >/dev/null 2>&1; then + # AIX install. It has an incompatible calling convention. + : + else + ac_cv_path_install="$ac_dir/$ac_prog -c" + break 2 + fi + fi + done + ;; + esac + done + IFS="$ac_save_IFS" + +fi + if test "${ac_cv_path_install+set}" = set; then + INSTALL="$ac_cv_path_install" + else + # As a last resort, use the slow shell script. We don't cache a + # path for INSTALL within a source directory, because that will + # break other packages using the cache if that directory is + # removed, or if the path is relative. + INSTALL="$ac_install_sh" + fi +fi +echo "$ac_t""$INSTALL" 1>&6 + +# Use test -z because SunOS4 sh mishandles braces in ${var-val}. +# It thinks the first close brace ends the variable substitution. +test -z "$INSTALL_PROGRAM" && INSTALL_PROGRAM='${INSTALL}' + +test -z "$INSTALL_SCRIPT" && INSTALL_SCRIPT='${INSTALL_PROGRAM}' + +test -z "$INSTALL_DATA" && INSTALL_DATA='${INSTALL} -m 644' + +# Extract the first word of "ranlib", so it can be a program name with args. +set dummy ranlib; ac_word=$2 +echo $ac_n "checking for $ac_word""... $ac_c" 1>&6 +echo "configure:834: checking for $ac_word" >&5 +if eval "test \"`echo '$''{'ac_cv_prog_RANLIB'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + if test -n "$RANLIB"; then + ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test. +else + IFS="${IFS= }"; ac_save_ifs="$IFS"; IFS=":" + ac_dummy="$PATH" + for ac_dir in $ac_dummy; do + test -z "$ac_dir" && ac_dir=. + if test -f $ac_dir/$ac_word; then + ac_cv_prog_RANLIB="ranlib" + break + fi + done + IFS="$ac_save_ifs" + test -z "$ac_cv_prog_RANLIB" && ac_cv_prog_RANLIB=":" +fi +fi +RANLIB="$ac_cv_prog_RANLIB" +if test -n "$RANLIB"; then + echo "$ac_t""$RANLIB" 1>&6 +else + echo "$ac_t""no" 1>&6 +fi + + + +# Make sure we can run config.sub. +if ${CONFIG_SHELL-/bin/sh} $ac_config_sub sun4 >/dev/null 2>&1; then : +else { echo "configure: error: can not run $ac_config_sub" 1>&2; exit 1; } +fi + +echo $ac_n "checking host system type""... $ac_c" 1>&6 +echo "configure:869: checking host system type" >&5 + +host_alias=$host +case "$host_alias" in +NONE) + case $nonopt in + NONE) + if host_alias=`${CONFIG_SHELL-/bin/sh} $ac_config_guess`; then : + else { echo "configure: error: can not guess host type; you must specify one" 1>&2; exit 1; } + fi ;; + *) host_alias=$nonopt ;; + esac ;; +esac + +host=`${CONFIG_SHELL-/bin/sh} $ac_config_sub $host_alias` +host_cpu=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\1/'` +host_vendor=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\2/'` +host_os=`echo $host | sed 's/^\([^-]*\)-\([^-]*\)-\(.*\)$/\3/'` +echo "$ac_t""$host" 1>&6 + +case $host_os in +solaris*) + cat >> confdefs.h <<\EOF +#define ETC_INET 1 +EOF + + ;; +esac + + +echo $ac_n "checking for library containing gethostbyname""... $ac_c" 1>&6 +echo "configure:900: checking for library containing gethostbyname" >&5 +if eval "test \"`echo '$''{'ac_cv_search_gethostbyname'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + ac_func_search_save_LIBS="$LIBS" +ac_cv_search_gethostbyname="no" +cat > conftest.$ac_ext <&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then + rm -rf conftest* + ac_cv_search_gethostbyname="none required" +else + echo "configure: failed program was:" >&5 + cat conftest.$ac_ext >&5 +fi +rm -f conftest* +test "$ac_cv_search_gethostbyname" = "no" && for i in nsl; do +LIBS="-l$i $ac_func_search_save_LIBS" +cat > conftest.$ac_ext <&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then + rm -rf conftest* + ac_cv_search_gethostbyname="-l$i" +break +else + echo "configure: failed program was:" >&5 + cat conftest.$ac_ext >&5 +fi +rm -f conftest* +done +LIBS="$ac_func_search_save_LIBS" +fi + +echo "$ac_t""$ac_cv_search_gethostbyname" 1>&6 +if test "$ac_cv_search_gethostbyname" != "no"; then + test "$ac_cv_search_gethostbyname" = "none required" || LIBS="$ac_cv_search_gethostbyname $LIBS" + +else : + +fi + +echo $ac_n "checking for library containing socket""... $ac_c" 1>&6 +echo "configure:962: checking for library containing socket" >&5 +if eval "test \"`echo '$''{'ac_cv_search_socket'+set}'`\" = set"; then + echo $ac_n "(cached) $ac_c" 1>&6 +else + ac_func_search_save_LIBS="$LIBS" +ac_cv_search_socket="no" +cat > conftest.$ac_ext <&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then + rm -rf conftest* + ac_cv_search_socket="none required" +else + echo "configure: failed program was:" >&5 + cat conftest.$ac_ext >&5 +fi +rm -f conftest* +test "$ac_cv_search_socket" = "no" && for i in socket; do +LIBS="-l$i $ac_func_search_save_LIBS" +cat > conftest.$ac_ext <&5; (eval $ac_link) 2>&5; } && test -s conftest${ac_exeext}; then + rm -rf conftest* + ac_cv_search_socket="-l$i" +break +else + echo "configure: failed program was:" >&5 + cat conftest.$ac_ext >&5 +fi +rm -f conftest* +done +LIBS="$ac_func_search_save_LIBS" +fi + +echo "$ac_t""$ac_cv_search_socket" 1>&6 +if test "$ac_cv_search_socket" != "no"; then + test "$ac_cv_search_socket" = "none required" || LIBS="$ac_cv_search_socket $LIBS" + +else : + +fi + +trap '' 1 2 15 +cat > confcache <<\EOF +# This file is a shell script that caches the results of configure +# tests run on this system so they can be shared between configure +# scripts and configure runs. It is not useful on other systems. +# If it contains results you don't want to keep, you may remove or edit it. +# +# By default, configure uses ./config.cache as the cache file, +# creating it if it does not exist already. You can give configure +# the --cache-file=FILE option to use a different cache file; that is +# what configure does when it calls configure scripts in +# subdirectories, so they share the cache. +# Giving --cache-file=/dev/null disables caching, for debugging configure. +# config.status only pays attention to the cache file if you give it the +# --recheck option to rerun configure. +# +EOF +# The following way of writing the cache mishandles newlines in values, +# but we know of no workaround that is simple, portable, and efficient. +# So, don't put newlines in cache variables' values. +# Ultrix sh set writes to stderr and can't be redirected directly, +# and sets the high bit in the cache file unless we assign to the vars. +(set) 2>&1 | + case `(ac_space=' '; set | grep ac_space) 2>&1` in + *ac_space=\ *) + # `set' does not quote correctly, so add quotes (double-quote substitution + # turns \\\\ into \\, and sed turns \\ into \). + sed -n \ + -e "s/'/'\\\\''/g" \ + -e "s/^\\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\\)=\\(.*\\)/\\1=\${\\1='\\2'}/p" + ;; + *) + # `set' quotes correctly as required by POSIX, so do not add quotes. + sed -n -e 's/^\([a-zA-Z0-9_]*_cv_[a-zA-Z0-9_]*\)=\(.*\)/\1=${\1=\2}/p' + ;; + esac >> confcache +if cmp -s $cache_file confcache; then + : +else + if test -w $cache_file; then + echo "updating cache $cache_file" + cat confcache > $cache_file + else + echo "not updating unwritable cache $cache_file" + fi +fi +rm -f confcache + +trap 'rm -fr conftest* confdefs* core core.* *.core $ac_clean_files; exit 1' 1 2 15 + +test "x$prefix" = xNONE && prefix=$ac_default_prefix +# Let make expand exec_prefix. +test "x$exec_prefix" = xNONE && exec_prefix='${prefix}' + +# Any assignment to VPATH causes Sun make to only execute +# the first set of double-colon rules, so remove it if not needed. +# If there is a colon in the path, we need to keep it. +if test "x$srcdir" = x.; then + ac_vpsub='/^[ ]*VPATH[ ]*=[^:]*$/d' +fi + +trap 'rm -f $CONFIG_STATUS conftest*; exit 1' 1 2 15 + +# Transform confdefs.h into DEFS. +# Protect against shell expansion while executing Makefile rules. +# Protect against Makefile macro expansion. +cat > conftest.defs <<\EOF +s%#define \([A-Za-z_][A-Za-z0-9_]*\) *\(.*\)%-D\1=\2%g +s%[ `~#$^&*(){}\\|;'"<>?]%\\&%g +s%\[%\\&%g +s%\]%\\&%g +s%\$%$$%g +EOF +DEFS=`sed -f conftest.defs confdefs.h | tr '\012' ' '` +rm -f conftest.defs + + +# Without the "./", some shells look in PATH for config.status. +: ${CONFIG_STATUS=./config.status} + +echo creating $CONFIG_STATUS +rm -f $CONFIG_STATUS +cat > $CONFIG_STATUS </dev/null | sed 1q`: +# +# $0 $ac_configure_args +# +# Compiler output produced by configure, useful for debugging +# configure, is in ./config.log if it exists. + +ac_cs_usage="Usage: $CONFIG_STATUS [--recheck] [--version] [--help]" +for ac_option +do + case "\$ac_option" in + -recheck | --recheck | --rechec | --reche | --rech | --rec | --re | --r) + echo "running \${CONFIG_SHELL-/bin/sh} $0 $ac_configure_args --no-create --no-recursion" + exec \${CONFIG_SHELL-/bin/sh} $0 $ac_configure_args --no-create --no-recursion ;; + -version | --version | --versio | --versi | --vers | --ver | --ve | --v) + echo "$CONFIG_STATUS generated by autoconf version 2.13" + exit 0 ;; + -help | --help | --hel | --he | --h) + echo "\$ac_cs_usage"; exit 0 ;; + *) echo "\$ac_cs_usage"; exit 1 ;; + esac +done + +ac_given_srcdir=$srcdir +ac_given_INSTALL="$INSTALL" + +trap 'rm -fr `echo "Makefile" | sed "s/:[^ ]*//g"` conftest*; exit 1' 1 2 15 +EOF +cat >> $CONFIG_STATUS < conftest.subs <<\\CEOF +$ac_vpsub +$extrasub +s%@SHELL@%$SHELL%g +s%@CFLAGS@%$CFLAGS%g +s%@CPPFLAGS@%$CPPFLAGS%g +s%@CXXFLAGS@%$CXXFLAGS%g +s%@FFLAGS@%$FFLAGS%g +s%@DEFS@%$DEFS%g +s%@LDFLAGS@%$LDFLAGS%g +s%@LIBS@%$LIBS%g +s%@exec_prefix@%$exec_prefix%g +s%@prefix@%$prefix%g +s%@program_transform_name@%$program_transform_name%g +s%@bindir@%$bindir%g +s%@sbindir@%$sbindir%g +s%@libexecdir@%$libexecdir%g +s%@datadir@%$datadir%g +s%@sysconfdir@%$sysconfdir%g +s%@sharedstatedir@%$sharedstatedir%g +s%@localstatedir@%$localstatedir%g +s%@libdir@%$libdir%g +s%@includedir@%$includedir%g +s%@oldincludedir@%$oldincludedir%g +s%@infodir@%$infodir%g +s%@mandir@%$mandir%g +s%@CC@%$CC%g +s%@INSTALL_PROGRAM@%$INSTALL_PROGRAM%g +s%@INSTALL_SCRIPT@%$INSTALL_SCRIPT%g +s%@INSTALL_DATA@%$INSTALL_DATA%g +s%@RANLIB@%$RANLIB%g +s%@host@%$host%g +s%@host_alias@%$host_alias%g +s%@host_cpu@%$host_cpu%g +s%@host_vendor@%$host_vendor%g +s%@host_os@%$host_os%g + +CEOF +EOF + +cat >> $CONFIG_STATUS <<\EOF + +# Split the substitutions into bite-sized pieces for seds with +# small command number limits, like on Digital OSF/1 and HP-UX. +ac_max_sed_cmds=90 # Maximum number of lines to put in a sed script. +ac_file=1 # Number of current file. +ac_beg=1 # First line for current file. +ac_end=$ac_max_sed_cmds # Line after last line for current file. +ac_more_lines=: +ac_sed_cmds="" +while $ac_more_lines; do + if test $ac_beg -gt 1; then + sed "1,${ac_beg}d; ${ac_end}q" conftest.subs > conftest.s$ac_file + else + sed "${ac_end}q" conftest.subs > conftest.s$ac_file + fi + if test ! -s conftest.s$ac_file; then + ac_more_lines=false + rm -f conftest.s$ac_file + else + if test -z "$ac_sed_cmds"; then + ac_sed_cmds="sed -f conftest.s$ac_file" + else + ac_sed_cmds="$ac_sed_cmds | sed -f conftest.s$ac_file" + fi + ac_file=`expr $ac_file + 1` + ac_beg=$ac_end + ac_end=`expr $ac_end + $ac_max_sed_cmds` + fi +done +if test -z "$ac_sed_cmds"; then + ac_sed_cmds=cat +fi +EOF + +cat >> $CONFIG_STATUS <> $CONFIG_STATUS <<\EOF +for ac_file in .. $CONFIG_FILES; do if test "x$ac_file" != x..; then + # Support "outfile[:infile[:infile...]]", defaulting infile="outfile.in". + case "$ac_file" in + *:*) ac_file_in=`echo "$ac_file"|sed 's%[^:]*:%%'` + ac_file=`echo "$ac_file"|sed 's%:.*%%'` ;; + *) ac_file_in="${ac_file}.in" ;; + esac + + # Adjust a relative srcdir, top_srcdir, and INSTALL for subdirectories. + + # Remove last slash and all that follows it. Not all systems have dirname. + ac_dir=`echo $ac_file|sed 's%/[^/][^/]*$%%'` + if test "$ac_dir" != "$ac_file" && test "$ac_dir" != .; then + # The file is in a subdirectory. + test ! -d "$ac_dir" && mkdir "$ac_dir" + ac_dir_suffix="/`echo $ac_dir|sed 's%^\./%%'`" + # A "../" for each directory in $ac_dir_suffix. + ac_dots=`echo $ac_dir_suffix|sed 's%/[^/]*%../%g'` + else + ac_dir_suffix= ac_dots= + fi + + case "$ac_given_srcdir" in + .) srcdir=. + if test -z "$ac_dots"; then top_srcdir=. + else top_srcdir=`echo $ac_dots|sed 's%/$%%'`; fi ;; + /*) srcdir="$ac_given_srcdir$ac_dir_suffix"; top_srcdir="$ac_given_srcdir" ;; + *) # Relative path. + srcdir="$ac_dots$ac_given_srcdir$ac_dir_suffix" + top_srcdir="$ac_dots$ac_given_srcdir" ;; + esac + + case "$ac_given_INSTALL" in + [/$]*) INSTALL="$ac_given_INSTALL" ;; + *) INSTALL="$ac_dots$ac_given_INSTALL" ;; + esac + + echo creating "$ac_file" + rm -f "$ac_file" + configure_input="Generated automatically from `echo $ac_file_in|sed 's%.*/%%'` by configure." + case "$ac_file" in + *Makefile*) ac_comsub="1i\\ +# $configure_input" ;; + *) ac_comsub= ;; + esac + + ac_file_inputs=`echo $ac_file_in|sed -e "s%^%$ac_given_srcdir/%" -e "s%:% $ac_given_srcdir/%g"` + sed -e "$ac_comsub +s%@configure_input@%$configure_input%g +s%@srcdir@%$srcdir%g +s%@top_srcdir@%$top_srcdir%g +s%@INSTALL@%$INSTALL%g +" $ac_file_inputs | (eval "$ac_sed_cmds") > $ac_file +fi; done +rm -f conftest.s* + +EOF +cat >> $CONFIG_STATUS <> $CONFIG_STATUS <<\EOF + +exit 0 +EOF +chmod +x $CONFIG_STATUS +rm -fr confdefs* $ac_clean_files +test "$no_create" = yes || ${CONFIG_SHELL-/bin/sh} $CONFIG_STATUS || exit 1 + diff --git a/libares/configure.in b/libares/configure.in new file mode 100644 index 0000000..cc8a3f2 --- /dev/null +++ b/libares/configure.in @@ -0,0 +1,18 @@ +dnl Process this file with autoconf to produce a configure script. +AC_INIT(ares_init.c) + +AC_PROG_CC +AC_PROG_INSTALL +AC_PROG_RANLIB + +AC_CANONICAL_HOST +case $host_os in +solaris*) + AC_DEFINE(ETC_INET) + ;; +esac + +AC_SEARCH_LIBS(gethostbyname, nsl) +AC_SEARCH_LIBS(socket, socket) + +AC_OUTPUT(Makefile) diff --git a/libares/install-sh b/libares/install-sh new file mode 100755 index 0000000..e9de238 --- /dev/null +++ b/libares/install-sh @@ -0,0 +1,251 @@ +#!/bin/sh +# +# install - install a program, script, or datafile +# This comes from X11R5 (mit/util/scripts/install.sh). +# +# Copyright 1991 by the Massachusetts Institute of Technology +# +# Permission to use, copy, modify, distribute, and sell this software and its +# documentation for any purpose is hereby granted without fee, provided that +# the above copyright notice appear in all copies and that both that +# copyright notice and this permission notice appear in supporting +# documentation, and that the name of M.I.T. not be used in advertising or +# publicity pertaining to distribution of the software without specific, +# written prior permission. M.I.T. makes no representations about the +# suitability of this software for any purpose. It is provided "as is" +# without express or implied warranty. +# +# Calling this script install-sh is preferred over install.sh, to prevent +# `make' implicit rules from creating a file called install from it +# when there is no Makefile. +# +# This script is compatible with the BSD install script, but was written +# from scratch. It can only install one file at a time, a restriction +# shared with many OS's install programs. + + +# set DOITPROG to echo to test this script + +# Don't use :- since 4.3BSD and earlier shells don't like it. +doit="${DOITPROG-}" + + +# put in absolute paths if you don't have them in your path; or use env. vars. + +mvprog="${MVPROG-mv}" +cpprog="${CPPROG-cp}" +chmodprog="${CHMODPROG-chmod}" +chownprog="${CHOWNPROG-chown}" +chgrpprog="${CHGRPPROG-chgrp}" +stripprog="${STRIPPROG-strip}" +rmprog="${RMPROG-rm}" +mkdirprog="${MKDIRPROG-mkdir}" + +transformbasename="" +transform_arg="" +instcmd="$mvprog" +chmodcmd="$chmodprog 0755" +chowncmd="" +chgrpcmd="" +stripcmd="" +rmcmd="$rmprog -f" +mvcmd="$mvprog" +src="" +dst="" +dir_arg="" + +while [ x"$1" != x ]; do + case $1 in + -c) instcmd="$cpprog" + shift + continue;; + + -d) dir_arg=true + shift + continue;; + + -m) chmodcmd="$chmodprog $2" + shift + shift + continue;; + + -o) chowncmd="$chownprog $2" + shift + shift + continue;; + + -g) chgrpcmd="$chgrpprog $2" + shift + shift + continue;; + + -s) stripcmd="$stripprog" + shift + continue;; + + -t=*) transformarg=`echo $1 | sed 's/-t=//'` + shift + continue;; + + -b=*) transformbasename=`echo $1 | sed 's/-b=//'` + shift + continue;; + + *) if [ x"$src" = x ] + then + src=$1 + else + # this colon is to work around a 386BSD /bin/sh bug + : + dst=$1 + fi + shift + continue;; + esac +done + +if [ x"$src" = x ] +then + echo "install: no input file specified" + exit 1 +else + true +fi + +if [ x"$dir_arg" != x ]; then + dst=$src + src="" + + if [ -d $dst ]; then + instcmd=: + chmodcmd="" + else + instcmd=mkdir + fi +else + +# Waiting for this to be detected by the "$instcmd $src $dsttmp" command +# might cause directories to be created, which would be especially bad +# if $src (and thus $dsttmp) contains '*'. + + if [ -f $src -o -d $src ] + then + true + else + echo "install: $src does not exist" + exit 1 + fi + + if [ x"$dst" = x ] + then + echo "install: no destination specified" + exit 1 + else + true + fi + +# If destination is a directory, append the input filename; if your system +# does not like double slashes in filenames, you may need to add some logic + + if [ -d $dst ] + then + dst="$dst"/`basename $src` + else + true + fi +fi + +## this sed command emulates the dirname command +dstdir=`echo $dst | sed -e 's,[^/]*$,,;s,/$,,;s,^$,.,'` + +# Make sure that the destination directory exists. +# this part is taken from Noah Friedman's mkinstalldirs script + +# Skip lots of stat calls in the usual case. +if [ ! -d "$dstdir" ]; then +defaultIFS=' +' +IFS="${IFS-${defaultIFS}}" + +oIFS="${IFS}" +# Some sh's can't handle IFS=/ for some reason. +IFS='%' +set - `echo ${dstdir} | sed -e 's@/@%@g' -e 's@^%@/@'` +IFS="${oIFS}" + +pathcomp='' + +while [ $# -ne 0 ] ; do + pathcomp="${pathcomp}${1}" + shift + + if [ ! -d "${pathcomp}" ] ; + then + $mkdirprog "${pathcomp}" + else + true + fi + + pathcomp="${pathcomp}/" +done +fi + +if [ x"$dir_arg" != x ] +then + $doit $instcmd $dst && + + if [ x"$chowncmd" != x ]; then $doit $chowncmd $dst; else true ; fi && + if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dst; else true ; fi && + if [ x"$stripcmd" != x ]; then $doit $stripcmd $dst; else true ; fi && + if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dst; else true ; fi +else + +# If we're going to rename the final executable, determine the name now. + + if [ x"$transformarg" = x ] + then + dstfile=`basename $dst` + else + dstfile=`basename $dst $transformbasename | + sed $transformarg`$transformbasename + fi + +# don't allow the sed command to completely eliminate the filename + + if [ x"$dstfile" = x ] + then + dstfile=`basename $dst` + else + true + fi + +# Make a temp file name in the proper directory. + + dsttmp=$dstdir/#inst.$$# + +# Move or copy the file name to the temp name + + $doit $instcmd $src $dsttmp && + + trap "rm -f ${dsttmp}" 0 && + +# and set any options; do chmod last to preserve setuid bits + +# If any of these fail, we abort the whole thing. If we want to +# ignore errors from any of these, just make sure not to ignore +# errors from the above "$doit $instcmd $src $dsttmp" command. + + if [ x"$chowncmd" != x ]; then $doit $chowncmd $dsttmp; else true;fi && + if [ x"$chgrpcmd" != x ]; then $doit $chgrpcmd $dsttmp; else true;fi && + if [ x"$stripcmd" != x ]; then $doit $stripcmd $dsttmp; else true;fi && + if [ x"$chmodcmd" != x ]; then $doit $chmodcmd $dsttmp; else true;fi && + +# Now rename the file to the real destination. + + $doit $rmcmd -f $dstdir/$dstfile && + $doit $mvcmd $dsttmp $dstdir/$dstfile + +fi && + + +exit 0 diff --git a/libares/mkinstalldirs b/libares/mkinstalldirs new file mode 100755 index 0000000..06cd397 --- /dev/null +++ b/libares/mkinstalldirs @@ -0,0 +1,40 @@ +#! /bin/sh +# mkinstalldirs --- make directory hierarchy +# Author: Noah Friedman +# Created: 1993-05-16 +# Public domain + +# $Id: mkinstalldirs,v 1.1 1999/11/01 19:33:54 danw Exp $ + +errstatus=0 + +for file +do + set fnord `echo ":$file" | sed -ne 's/^:\//#/;s/^://;s/\// /g;s/^#/\//;p'` + shift + + pathcomp= + for d + do + pathcomp="$pathcomp$d" + case "$pathcomp" in + -* ) pathcomp=./$pathcomp ;; + esac + + if test ! -d "$pathcomp"; then + echo "mkdir $pathcomp" + + mkdir "$pathcomp" || lasterr=$? + + if test ! -d "$pathcomp"; then + errstatus=$lasterr + fi + fi + + pathcomp="$pathcomp/" + done +done + +exit $errstatus + +# mkinstalldirs ends here -- 2.45.2