mirror of
https://github.com/yarrick/iodine.git
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70 lines
1.7 KiB
C
70 lines
1.7 KiB
C
/*
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* Copyright (c) 2006-2009 Bjorn Andersson <flex@kryo.se>, Erik Ekman <yarrick@kryo.se>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdio.h>
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#include "common.h"
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char *
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get_resolvconf_addr()
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{
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static char addr[16];
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char *rv;
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#ifndef WINDOWS32
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char buf[80];
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FILE *fp;
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rv = NULL;
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if ((fp = fopen("/etc/resolv.conf", "r")) == NULL)
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err(1, "/etc/resolv.conf");
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while (feof(fp) == 0) {
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fgets(buf, sizeof(buf), fp);
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if (sscanf(buf, "nameserver %15s", addr) == 1) {
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rv = addr;
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break;
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}
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}
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fclose(fp);
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#else /* !WINDOWS32 */
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FIXED_INFO *fixed_info;
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ULONG buflen;
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DWORD ret;
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rv = NULL;
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fixed_info = malloc(sizeof(FIXED_INFO));
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buflen = sizeof(FIXED_INFO);
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if (GetNetworkParams(fixed_info, &buflen) == ERROR_BUFFER_OVERFLOW) {
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/* official ugly api workaround */
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free(fixed_info);
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fixed_info = malloc(buflen);
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}
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ret = GetNetworkParams(fixed_info, &buflen);
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if (ret == NO_ERROR) {
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strncpy(addr, fixed_info->DnsServerList.IpAddress.String, sizeof(addr));
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addr[15] = 0;
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rv = addr;
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}
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free(fixed_info);
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#endif
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return rv;
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}
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