r0 = socket$inet_udp(0x2, 0x2, 0x0)
ioctl$sock_inet_SIOCDELRT(r0, 0x890c, &(0x7f0000000100)={0x0, {0x2, 0x0, @private}, {0x2, 0x0, @private}, {0x2, 0x0, @broadcast}, 0x281})