r0 = socket$inet6_udp(0xa, 0x2, 0x0)
sendmmsg$inet6(r0, &(0x7f0000003d80)=[{{&(0x7f00000000c0)={0xa, 0x4e21, 0x0, @mcast2}, 0x1c, 0x0}}], 0x1, 0x8005)
sendmmsg$inet6(r0, &(0x7f0000001d40)=[{{0x0, 0x0, 0x0}}, {{&(0x7f0000001980)={0xa, 0x0, 0x0, @ipv4}, 0x1c, 0x0}}], 0x2, 0x2000a800)