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set configured addresses to tun device.

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This commit is contained in:
Nikos Mavrogiannopoulos
2013-01-13 13:57:32 +01:00
parent 04f9a4ae9e
commit ee6e6a63cb
2 changed files with 115 additions and 10 deletions
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122
src/main.c
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@@ -193,10 +193,103 @@ static void handle_alarm(int signo)
need_to_expire_cookies = 1;
}
static int open_tun(void)
static int set_network_info(const struct vpn_st* vinfo)
{
int tunfd;
struct ifreq ifr;
int fd, ret;
fd = socket(AF_INET, SOCK_STREAM, 0);
if (fd == -1)
return -1;
/* set netmask */
if (vinfo->ipv4_netmask && vinfo->ipv4) {
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_addr.sa_family = AF_INET;
snprintf(ifr.ifr_name, IFNAMSIZ, "%s", vinfo->name);
ret = inet_pton(AF_INET, vinfo->ipv4_netmask, &((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr);
if (ret != 1) {
syslog(LOG_ERR, "%s: Error reading mask: %s\n",
vinfo->name, vinfo->ipv4_netmask);
goto fail;
}
ret = ioctl(fd, SIOCSIFNETMASK, &ifr);
if (ret != 0) {
syslog(LOG_ERR, "%s: Error setting mask: %s\n",
vinfo->name, vinfo->ipv4_netmask);
}
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_addr.sa_family = AF_INET;
snprintf(ifr.ifr_name, IFNAMSIZ, "%s", vinfo->name);
ret = inet_pton(AF_INET, vinfo->ipv4, &((struct sockaddr_in *)&ifr.ifr_addr)->sin_addr);
if (ret != 1) {
syslog(LOG_ERR, "%s: Error reading IP: %s\n",
vinfo->name, vinfo->ipv4_netmask);
goto fail;
}
ret = ioctl(fd, SIOCSIFADDR, &ifr);
if (ret != 0) {
syslog(LOG_ERR, "%s: Error setting IP: %s\n",
vinfo->name, vinfo->ipv4);
}
}
if (vinfo->ipv6_netmask && vinfo->ipv6) {
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_addr.sa_family = AF_INET6;
snprintf(ifr.ifr_name, IFNAMSIZ, "%s", vinfo->name);
ret = inet_pton(AF_INET6, vinfo->ipv6_netmask, &((struct sockaddr_in6 *)&ifr.ifr_addr)->sin6_addr);
if (ret != 1) {
syslog(LOG_ERR, "%s: Error reading mask: %s\n",
vinfo->name, vinfo->ipv6_netmask);
goto fail;
}
ret = ioctl(fd, SIOCSIFNETMASK, &ifr);
if (ret != 0) {
syslog(LOG_ERR, "%s: Error setting mask: %s\n",
vinfo->name, vinfo->ipv6_netmask);
}
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_addr.sa_family = AF_INET6;
snprintf(ifr.ifr_name, IFNAMSIZ, "%s", vinfo->name);
ret = inet_pton(AF_INET6, vinfo->ipv6, &((struct sockaddr_in6 *)&ifr.ifr_addr)->sin6_addr);
if (ret != 1) {
syslog(LOG_ERR, "%s: Error reading IP: %s\n",
vinfo->name, vinfo->ipv6_netmask);
goto fail;
}
ret = ioctl(fd, SIOCSIFADDR, &ifr);
if (ret != 0) {
syslog(LOG_ERR, "%s: Error setting IP: %s\n",
vinfo->name, vinfo->ipv6);
}
}
ret = 0;
fail:
close(fd);
return ret;
}
static int open_tun(struct cfg_st *config)
{
int tunfd, ret;
struct ifreq ifr;
unsigned int i;
tunfd = open("/dev/net/tun", O_RDWR);
if (tunfd < 0) {
@@ -206,13 +299,22 @@ struct ifreq ifr;
return -1;
}
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), "vpns%d", 0);
if (ioctl(tunfd, TUNSETIFF, (void *) &ifr) < 0) {
int e = errno;
syslog(LOG_ERR, "TUNSETIFF: %s\n", strerror(e));
exit(1);
for (i=0;i<config->networks_size;i++) {
memset(&ifr, 0, sizeof(ifr));
ifr.ifr_flags = IFF_TUN | IFF_NO_PI;
snprintf(ifr.ifr_name, sizeof(ifr.ifr_name), config->networks[i].name, 0);
if (ioctl(tunfd, TUNSETIFF, (void *) &ifr) < 0) {
int e = errno;
syslog(LOG_ERR, "TUNSETIFF: %s\n", strerror(e));
exit(1);
}
/* set IP/mask */
ret = set_network_info(&config->networks[i]);
if (ret < 0) {
exit(1);
}
}
return tunfd;
@@ -280,7 +382,7 @@ int main(void)
exit(1);
}
tunfd = open_tun();
tunfd = open_tun(&config);
if (tunfd < 0) {
exit(1);
}