r0 = socket$inet6_udp(0xa, 0x2, 0x0)
sendmmsg$inet(r0, &(0x7f0000002d80)=[{{&(0x7f0000000080)={0x2, 0x4e23, @dev}, 0x10, 0x0}}, {{&(0x7f0000000000)={0x2, 0x4e21, @multicast1}, 0x10, 0x0}}], 0x2, 0x0)