--- /dev/null
+# $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
--- /dev/null
+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.
--- /dev/null
+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 <arpa/nameser.h>.
+
+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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <unistd.h>
+#include <errno.h>
+#include <netdb.h>
+#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);
+}
--- /dev/null
+/* 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 <sys/types.h>
+#include <sys/time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <netdb.h>
+#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);
+}
--- /dev/null
+/* $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 <sys/types.h>
+#include <netinet/in.h>
+
+#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 */
--- /dev/null
+/* 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 $";
+
+#include <stdlib.h>
+#include <unistd.h>
+#include "ares.h"
+#include "ares_private.h"
+
+void ares__close_sockets(struct server_state *server)
+{
+ struct send_request *sendreq;
+
+ /* Free all pending output buffers. */
+ while (server->qhead)
+ {
+ /* Advance server->qhead; pull out query as we go. */
+ sendreq = server->qhead;
+ server->qhead = sendreq->next;
+ free(sendreq);
+ }
+ server->qtail = NULL;
+
+ /* Reset any existing input buffer. */
+ if (server->tcp_buffer)
+ free(server->tcp_buffer);
+ server->tcp_buffer = NULL;
+ server->tcp_lenbuf_pos = 0;
+
+ /* Close the TCP and UDP sockets. */
+ if (server->tcp_socket != -1)
+ {
+ close(server->tcp_socket);
+ server->tcp_socket = -1;
+ }
+ if (server->udp_socket != -1)
+ {
+ close(server->udp_socket);
+ server->udp_socket = -1;
+ }
+}
--- /dev/null
+/* Copyright 1998 by the Massachusetts Institute of Technology.
+ *
+ * Permission to use, copy, modify, and distribute this
+ * software and its documentation for any purpose and without
+ * fee is hereby granted, provided that the above copyright
+ * notice appear in all copies and that both that copyright
+ * notice and this permission notice appear in supporting
+ * documentation, and that the name of M.I.T. not be used in
+ * advertising or publicity pertaining to distribution of the
+ * software without specific, written prior permission.
+ * M.I.T. makes no representations about the suitability of
+ * this software for any purpose. It is provided "as is"
+ * without express or implied warranty.
+ */
+
+static const char rcsid[] = "$Id: ares__get_hostent.c,v 1.3 2000/02/17 18:39:58 ghudson Exp $";
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <netdb.h>
+#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;
+}
--- /dev/null
+/* 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#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;
+ }
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <stdlib.h>
+#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);
+}
--- /dev/null
+/* $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 */
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <stdlib.h>
+#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;
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <sys/time.h>
+#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;
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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)
+{
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <stdlib.h>
+#include <netdb.h>
+#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);
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <stdlib.h>
+#include "ares.h"
+
+void ares_free_string(char *str)
+{
+ free(str);
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <netdb.h>
+#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;
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <netdb.h>
+#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;
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <sys/time.h>
+#include <sys/param.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <time.h>
+#include <unistd.h>
+#include <errno.h>
+#include <netdb.h>
+#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);
+}
--- /dev/null
+.so man3/ares_init.3
+.\" $Id: ares_init_options.3,v 1.1 1998/08/13 18:07:32 ghudson Exp $
--- /dev/null
+.\" $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 <ares.h>
+.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 <arpa/nameser.h> .
+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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <stdlib.h>
+#include <string.h>
+#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;
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <arpa/nameser.h>
+#include <stdlib.h>
+#include <string.h>
+#include <netdb.h>
+#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;
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <stdlib.h>
+#include <string.h>
+#include <netdb.h>
+#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;
+}
--- /dev/null
+/* $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 <stdio.h>
+#include <sys/types.h>
+#include <netinet/in.h>
+
+#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);
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <sys/socket.h>
+#include <sys/uio.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <time.h>
+#include <errno.h>
+#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]);
+ }
+}
--- /dev/null
+.\" $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 <ares.h>
+.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 <arpa/nameser.h> .
+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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <stdlib.h>
+#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);
+}
--- /dev/null
+.\" $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 <ares.h>
+.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 <arpa/nameser.h> .
+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.
--- /dev/null
+/* 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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#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;
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <netinet/in.h>
+#include <arpa/nameser.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#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);
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <assert.h>
+#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];
+}
--- /dev/null
+.\" $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 <ares.h>
+.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.
--- /dev/null
+/* 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 <sys/types.h>
+#include <sys/time.h>
+#include <time.h>
+#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;
+}
--- /dev/null
+#! /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 <bothner@cygnus.com>.
+# 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 <<EOF >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 <sys/systemcfg.h>
+
+ 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 <stdlib.h>
+ #include <unistd.h>
+
+ 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 <unistd.h>
+ 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/^ //' <<EOF >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 <<EOF
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+#ifdef __MIPSEB__
+ printf ("%s-unknown-linux-gnu\n", argv[1]);
+#endif
+#ifdef __MIPSEL__
+ printf ("%sel-unknown-linux-gnu\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
+ 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 "${UNAME_MACHINE}" in
+ i?86)
+ VENDOR=pc;
+ ;;
+ *)
+ VENDOR=unknown;
+ ;;
+ esac
+ # Determine whether the default compiler is a.out or elf
+ cat >dummy.c <<EOF
+#include <features.h>
+main(argc, argv)
+ int argc;
+ char *argv[];
+{
+#ifdef __ELF__
+# ifdef __GLIBC__
+# if __GLIBC__ >= 2
+ printf ("%s-${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' </usr/options/cb.name`
+ echo ${UNAME_MACHINE}-pc-isc$UNAME_REL
+ elif /bin/uname -X 2>/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 ${UNAME_MACHINE}-sni-sysv4
+ else
+ echo ns32k-sni-sysv
+ fi
+ exit 0 ;;
+ PENTIUM:CPunix:4.0*:*) # Unisys `ClearPath HMP IX 4000' SVR4/MP effort
+ # says <Richard.M.Bartel@ccMail.Census.GOV>
+ echo i586-unisys-sysv4
+ exit 0 ;;
+ *:UNIX_System_V:4*:FTX*)
+ # From Gerald Hewes <hewes@openmarket.com>.
+ # How about differentiating between stratus architectures? -djm
+ echo hppa1.1-stratus-sysv4
+ exit 0 ;;
+ *:*:*:FTX*)
+ # From seanf@swdc.stratus.com.
+ echo i860-stratus-sysv4
+ exit 0 ;;
+ mc68*:A/UX:*:*)
+ echo m68k-apple-aux${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 <<EOF
+#ifdef _SEQUENT_
+# include <sys/types.h>
+# include <sys/utsname.h>
+#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 <sys/param.h>
+ 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
--- /dev/null
+#! /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
--- /dev/null
+#! /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 "$ac_prev"; then
+ eval "$ac_prev=\$ac_option"
+ ac_prev=
+ continue
+ fi
+
+ case "$ac_option" in
+ -*=*) ac_optarg=`echo "$ac_option" | sed 's/[-_a-zA-Z0-9]*=//'` ;;
+ *) ac_optarg= ;;
+ esac
+
+ # Accept the important Cygnus configure options, so we can diagnose typos.
+
+ case "$ac_option" in
+
+ -bindir | --bindir | --bindi | --bind | --bin | --bi)
+ ac_prev=bindir ;;
+ -bindir=* | --bindir=* | --bindi=* | --bind=* | --bin=* | --bi=*)
+ bindir="$ac_optarg" ;;
+
+ -build | --build | --buil | --bui | --bu)
+ ac_prev=build ;;
+ -build=* | --build=* | --buil=* | --bui=* | --bu=*)
+ build="$ac_optarg" ;;
+
+ -cache-file | --cache-file | --cache-fil | --cache-fi \
+ | --cache-f | --cache- | --cache | --cach | --cac | --ca | --c)
+ ac_prev=cache_file ;;
+ -cache-file=* | --cache-file=* | --cache-fil=* | --cache-fi=* \
+ | --cache-f=* | --cache-=* | --cache=* | --cach=* | --cac=* | --ca=* | --c=*)
+ cache_file="$ac_optarg" ;;
+
+ -datadir | --datadir | --datadi | --datad | --data | --dat | --da)
+ ac_prev=datadir ;;
+ -datadir=* | --datadir=* | --datadi=* | --datad=* | --data=* | --dat=* \
+ | --da=*)
+ datadir="$ac_optarg" ;;
+
+ -disable-* | --disable-*)
+ ac_feature=`echo $ac_option|sed -e 's/-*disable-//'`
+ # Reject names that are not valid shell variable names.
+ if test -n "`echo $ac_feature| sed 's/[-a-zA-Z0-9_]//g'`"; then
+ { echo "configure: error: $ac_feature: invalid feature name" 1>&2; exit 1; }
+ fi
+ ac_feature=`echo $ac_feature| sed 's/-/_/g'`
+ eval "enable_${ac_feature}=no" ;;
+
+ -enable-* | --enable-*)
+ ac_feature=`echo $ac_option|sed -e 's/-*enable-//' -e 's/=.*//'`
+ # Reject names that are not valid shell variable names.
+ if test -n "`echo $ac_feature| sed 's/[-_a-zA-Z0-9]//g'`"; then
+ { echo "configure: error: $ac_feature: invalid feature name" 1>&2; exit 1; }
+ fi
+ ac_feature=`echo $ac_feature| sed 's/-/_/g'`
+ case "$ac_option" in
+ *=*) ;;
+ *) ac_optarg=yes ;;
+ esac
+ eval "enable_${ac_feature}='$ac_optarg'" ;;
+
+ -exec-prefix | --exec_prefix | --exec-prefix | --exec-prefi \
+ | --exec-pref | --exec-pre | --exec-pr | --exec-p | --exec- \
+ | --exec | --exe | --ex)
+ ac_prev=exec_prefix ;;
+ -exec-prefix=* | --exec_prefix=* | --exec-prefix=* | --exec-prefi=* \
+ | --exec-pref=* | --exec-pre=* | --exec-pr=* | --exec-p=* | --exec-=* \
+ | --exec=* | --exe=* | --ex=*)
+ exec_prefix="$ac_optarg" ;;
+
+ -gas | --gas | --ga | --g)
+ # Obsolete; use --with-gas.
+ with_gas=yes ;;
+
+ -help | --help | --hel | --he)
+ # Omit some internal or obsolete options to make the list less imposing.
+ # This message is too long to be a string in the A/UX 3.1 sh.
+ cat << EOF
+Usage: configure [options] [host]
+Options: [defaults in brackets after descriptions]
+Configuration:
+ --cache-file=FILE cache test results in FILE
+ --help print this message
+ --no-create do not create output files
+ --quiet, --silent do not print \`checking...' messages
+ --version print the version of autoconf that created configure
+Directory and file names:
+ --prefix=PREFIX install architecture-independent files in PREFIX
+ [$ac_default_prefix]
+ --exec-prefix=EPREFIX install architecture-dependent files in EPREFIX
+ [same as prefix]
+ --bindir=DIR user executables in DIR [EPREFIX/bin]
+ --sbindir=DIR system admin executables in DIR [EPREFIX/sbin]
+ --libexecdir=DIR program executables in DIR [EPREFIX/libexec]
+ --datadir=DIR read-only architecture-independent data in DIR
+ [PREFIX/share]
+ --sysconfdir=DIR read-only single-machine data in DIR [PREFIX/etc]
+ --sharedstatedir=DIR modifiable architecture-independent data in DIR
+ [PREFIX/com]
+ --localstatedir=DIR modifiable single-machine data in DIR [PREFIX/var]
+ --libdir=DIR object code libraries in DIR [EPREFIX/lib]
+ --includedir=DIR C header files in DIR [PREFIX/include]
+ --oldincludedir=DIR C header files for non-gcc in DIR [/usr/include]
+ --infodir=DIR info documentation in DIR [PREFIX/info]
+ --mandir=DIR man documentation in DIR [PREFIX/man]
+ --srcdir=DIR find the sources in DIR [configure dir or ..]
+ --program-prefix=PREFIX prepend PREFIX to installed program names
+ --program-suffix=SUFFIX append SUFFIX to installed program names
+ --program-transform-name=PROGRAM
+ run sed PROGRAM on installed program names
+EOF
+ cat << EOF
+Host type:
+ --build=BUILD configure for building on BUILD [BUILD=HOST]
+ --host=HOST configure for HOST [guessed]
+ --target=TARGET configure for TARGET [TARGET=HOST]
+Features and packages:
+ --disable-FEATURE do not include FEATURE (same as --enable-FEATURE=no)
+ --enable-FEATURE[=ARG] include FEATURE [ARG=yes]
+ --with-PACKAGE[=ARG] use PACKAGE [ARG=yes]
+ --without-PACKAGE do not use PACKAGE (same as --with-PACKAGE=no)
+ --x-includes=DIR X include files are in DIR
+ --x-libraries=DIR X library files are in DIR
+EOF
+ if test -n "$ac_help"; then
+ echo "--enable and --with options recognized:$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="$ac_optarg" ;;
+
+ -localstatedir | --localstatedir | --localstatedi | --localstated \
+ | --localstate | --localstat | --localsta | --localst \
+ | --locals | --local | --loca | --loc | --lo)
+ ac_prev=localstatedir ;;
+ -localstatedir=* | --localstatedir=* | --localstatedi=* | --localstated=* \
+ | --localstate=* | --localstat=* | --localsta=* | --localst=* \
+ | --locals=* | --local=* | --loca=* | --loc=* | --lo=*)
+ localstatedir="$ac_optarg" ;;
+
+ -mandir | --mandir | --mandi | --mand | --man | --ma | --m)
+ ac_prev=mandir ;;
+ -mandir=* | --mandir=* | --mandi=* | --mand=* | --man=* | --ma=* | --m=*)
+ mandir="$ac_optarg" ;;
+
+ -nfp | --nfp | --nf)
+ # Obsolete; use --without-fp.
+ with_fp=no ;;
+
+ -no-create | --no-create | --no-creat | --no-crea | --no-cre \
+ | --no-cr | --no-c)
+ no_create=yes ;;
+
+ -no-recursion | --no-recursion | --no-recursio | --no-recursi \
+ | --no-recurs | --no-recur | --no-recu | --no-rec | --no-re | --no-r)
+ no_recursion=yes ;;
+
+ -oldincludedir | --oldincludedir | --oldincludedi | --oldincluded \
+ | --oldinclude | --oldinclud | --oldinclu | --oldincl | --oldinc \
+ | --oldin | --oldi | --old | --ol | --o)
+ ac_prev=oldincludedir ;;
+ -oldincludedir=* | --oldincludedir=* | --oldincludedi=* | --oldincluded=* \
+ | --oldinclude=* | --oldinclud=* | --oldinclu=* | --oldincl=* | --oldinc=* \
+ | --oldin=* | --oldi=* | --old=* | --ol=* | --o=*)
+ oldincludedir="$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) $ac_c" 1>&6
+else
+ cat > conftest.c <<EOF
+#ifdef __GNUC__
+ yes;
+#endif
+EOF
+if { ac_try='${CC-cc} -E conftest.c'; { (eval echo configure:698: \"$ac_try\") 1>&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.$ac_ext <<EOF
+#line 907 "configure"
+#include "confdefs.h"
+/* Override any gcc2 internal prototype to avoid an error. */
+/* We use char because int might match the return type of a gcc2
+ builtin and then its argument prototype would still apply. */
+char gethostbyname();
+
+int main() {
+gethostbyname()
+; return 0; }
+EOF
+if { (eval echo configure:918: \"$ac_link\") 1>&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 <<EOF
+#line 929 "configure"
+#include "confdefs.h"
+/* Override any gcc2 internal prototype to avoid an error. */
+/* We use char because int might match the return type of a gcc2
+ builtin and then its argument prototype would still apply. */
+char gethostbyname();
+
+int main() {
+gethostbyname()
+; return 0; }
+EOF
+if { (eval echo configure:940: \"$ac_link\") 1>&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.$ac_ext <<EOF
+#line 969 "configure"
+#include "confdefs.h"
+/* Override any gcc2 internal prototype to avoid an error. */
+/* We use char because int might match the return type of a gcc2
+ builtin and then its argument prototype would still apply. */
+char socket();
+
+int main() {
+socket()
+; return 0; }
+EOF
+if { (eval echo configure:980: \"$ac_link\") 1>&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 <<EOF
+#line 991 "configure"
+#include "confdefs.h"
+/* Override any gcc2 internal prototype to avoid an error. */
+/* We use char because int might match the return type of a gcc2
+ builtin and then its argument prototype would still apply. */
+char socket();
+
+int main() {
+socket()
+; return 0; }
+EOF
+if { (eval echo configure:1002: \"$ac_link\") 1>&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 <<EOF
+#! /bin/sh
+# Generated automatically by configure.
+# Run this file to recreate the current configuration.
+# This directory was configured as follows,
+# on host `(hostname || uname -n) 2>/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 <<EOF
+
+# Protect against being on the right side of a sed subst in config.status.
+sed 's/%@/@@/; s/@%/@@/; s/%g\$/@g/; /@g\$/s/[\\\\&%]/\\\\&/g;
+ s/@@/%@/; s/@@/@%/; s/@g\$/%g/' > 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 <<EOF
+
+CONFIG_FILES=\${CONFIG_FILES-"Makefile"}
+EOF
+cat >> $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 <<EOF
+
+EOF
+cat >> $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
+
--- /dev/null
+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)
--- /dev/null
+#!/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
--- /dev/null
+#! /bin/sh
+# mkinstalldirs --- make directory hierarchy
+# Author: Noah Friedman <friedman@prep.ai.mit.edu>
+# 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
projects / 1ts-debian.git / commitdiff