r0 = socket$inet_udp(0x2, 0x2, 0x0)
sendmmsg$inet(r0, &(0x7f0000008140)=[{{&(0x7f0000000000)={0x2, 0x4e23, @multicast1}, 0x10, 0x0, 0x0, &(0x7f00000000c0)=[@ip_retopts={{0x18, 0x0, 0x7, {[@rr={0x7, 0x7, 0x4, [@loopback]}]}}}], 0x18}}], 0x1, 0x0)