+++ /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;
-}