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