r0 = socket$inet6_udp(0xa, 0x2, 0x0)
sendmmsg$inet6(r0, &(0x7f0000005d40)=[{{&(0x7f0000001680)={0xa, 0x4e24, 0x0, @mcast2}, 0x1c, 0x0}}], 0x1, 0x4008000)
sendmmsg$inet6(r0, &(0x7f0000002a80)=[{{0x0, 0x0, 0x0}}, {{&(0x7f0000002900)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @multicast2}}, 0x1c, 0x0}}], 0x2, 0x20008081)