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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <netinet/in.h>
#include <net/if.h>
#include <arpa/inet.h>
#include "config.h"
#ifdef HAVE_RESOLVE
#include <resolv.h>
#endif
int
utGetDefaultGwInfo(char **szDevPtr, char **szIpPtr)
{
FILE *f;
char line[100];
char *p, *c, *g;
char *saveptr;
int ret = 1;
f = fopen("/proc/net/route" , "r");
while (fgets(line , 100 , f)) {
p = strtok_r(line , " \t", &saveptr);
c = strtok_r(NULL , " \t", &saveptr);
g = strtok_r(NULL , " \t", &saveptr);
if (p && c) {
if (strcmp(c , "00000000") == 0) {
*szDevPtr = calloc(IFNAMSIZ, sizeof(char));
memcpy(*szDevPtr, p, IFNAMSIZ-1);
*szIpPtr = NULL;
if (g) {
char *pEnd;
int ng = strtol(g,&pEnd,16);
struct in_addr addr;
addr.s_addr = ng;
*szIpPtr = calloc(IFNAMSIZ, sizeof(char));
memcpy(*szIpPtr, inet_ntoa(addr), IFNAMSIZ-1);
ret = 0;
}
break;
}
}
}
fclose(f);
return ret;
}
int
utGetIpFromNetDev(char *netdev, char **szIpPtr)
{
int fd;
struct ifreq ifr;
int ret = 1;
memset(&ifr, '\0', sizeof(struct ifreq));
fd = socket(AF_INET, SOCK_DGRAM, 0);
ifr.ifr_addr.sa_family = AF_INET;
strncpy(ifr.ifr_name, netdev, IFNAMSIZ-1);
if (ioctl(fd, SIOCGIFADDR, &ifr) != -1) {
*szIpPtr = calloc(IFNAMSIZ, sizeof(char));
memcpy(*szIpPtr, inet_ntoa(((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr), IFNAMSIZ-1);
ret = 0;
}
close(fd);
return ret;
}
#ifdef HAVE_RESOLVE
int
utGetDomainInfo(char **szDefDomain, char **szDefServer)
{
if (res_init() != 0)
return 1;
*szDefDomain = calloc(257, sizeof(char));
memcpy(*szDefDomain, _res.defdname, 256);
*szDefServer = calloc(IFNAMSIZ, sizeof(char));
memcpy(*szDefServer, inet_ntoa(_res.nsaddr_list[0].sin_addr), IFNAMSIZ-1);
res_close();
return 0;
}
#endif
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