/* Equiv of `ip link set up lo`. Kernel will assign 127.0.0.1 for us. */
strcpy(ifr.ifr_name, "lo");
if (ioctl(sock, SIOCGIFFLAGS, &ifr) < 0)
err(1, "ioctl(SIOCGIFFLAGS) failed");
/* Equiv of `ip link set up lo`. Kernel will assign 127.0.0.1 for us. */
strcpy(ifr.ifr_name, "lo");
if (ioctl(sock, SIOCGIFFLAGS, &ifr) < 0)
err(1, "ioctl(SIOCGIFFLAGS) failed");