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reset the IPv4 address of tun device in linux

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This commit is contained in:
Nikos Mavrogiannopoulos
2015-04-16 13:34:15 +03:00
parent 0885a65d5e
commit 12075284bf
1 changed files with 40 additions and 20 deletions
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src/tun.c
+40 -20
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@@ -632,29 +632,49 @@ void close_tun(main_server_st * s, struct proc_st *proc)
return;
}
static void reset_ipv4_addr(struct proc_st *proc)
{
int fd;
if (proc->ipv4 == NULL || proc->ipv4->lip_len == 0)
return;
#if defined(SIOCDIFADDR) && !defined(__linux__)
fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd >= 0) {
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strlcpy(ifr.ifr_name, proc->tun_lease.name, IFNAMSIZ);
memcpy(&ifr.ifr_addr, &proc->ipv4->lip, proc->ipv4->lip_len);
ifr.ifr_addr.sa_len = sizeof(struct sockaddr_in);
ifr.ifr_addr.sa_family = AF_INET;
ioctl(fd, SIOCDIFADDR, &ifr);
close(fd);
}
#elif defined(__linux__)
fd = socket(AF_INET, SOCK_STREAM, 0);
if (fd >= 0) {
struct ifreq ifr;
strlcpy(ifr.ifr_name, proc->tun_lease.name, IFNAMSIZ);
memcpy(&ifr.ifr_addr, &proc->ipv4->lip, proc->ipv4->lip_len);
ifr.ifr_addr.sa_family = AF_INET;
ioctl(fd, SIOCDIFADDR, &ifr);
close(fd);
}
#endif
}
void reset_tun(struct proc_st* proc)
{
if (proc->tun_lease.name[0] != 0) {
#if defined(SIOCDIFADDR) && !defined(__linux__)
if (proc->ipv4 && proc->ipv4->lip_len > 0) {
int fd = socket(AF_INET, SOCK_DGRAM, 0);
if (fd >= 0) {
struct ifreq ifr;
memset(&ifr, 0, sizeof(ifr));
strlcpy(ifr.ifr_name, proc->tun_lease.name, IFNAMSIZ);
memcpy(&ifr.ifr_addr, &proc->ipv4->lip, proc->ipv4->lip_len);
ifr.ifr_addr.sa_len = sizeof(struct sockaddr_in);
ifr.ifr_addr.sa_family = AF_INET;
ioctl(fd, SIOCDIFADDR, &ifr);
close(fd);
}
}
#endif
reset_ipv4_addr(proc);
reset_ipv6_addr(proc);
}
}