This commit was manufactured by cvs2svn to create branch 'upstream'.

[1ts-debian.git] / libares / ares_parse_a_reply.c

diff --git a/libares/ares_parse_a_reply.c b/libares/ares_parse_a_reply.c
deleted file mode 100644 (file)
index fabf50c..0000000
--- a/libares/ares_parse_a_reply.c
+++ /dev/null
@@ -1,167 +0,0 @@
-/* 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;
-}