diff options
| -rw-r--r-- | tap.c | 17 |
1 files changed, 11 insertions, 6 deletions
@@ -848,20 +848,25 @@ static int tap_sock_init_tun_ns(void *target_pid) if (ns_enter(*(int *)target_pid)) goto fail; - if ((fd = open("/dev/net/tun", O_RDWR)) < 0) + if ((fd = open("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0) goto fail; - fcntl(fd, F_SETFL, O_NONBLOCK); - tun_ns_fd = fd; - if (ioctl(socket(AF_INET, SOCK_DGRAM, 0), SIOCSIFFLAGS, - &((struct ifreq) { .ifr_name = "lo", - .ifr_flags = IFF_UP }))) { + if ((fd = socket(AF_INET, SOCK_DGRAM, 0)) < 0) { + perror("socket for ioctl"); + goto fail; + } + + if (ioctl(fd, SIOCSIFFLAGS, &((struct ifreq){ .ifr_name = "lo", + .ifr_flags = IFF_UP }))) { perror("SIOCSIFFLAGS ioctl for \"lo\""); + close(fd); goto fail; } + close(fd); + return 0; fail: |