r0 = socket$inet6_udp(0xa, 0x2, 0x0)
sendmmsg$inet6(r0, &(0x7f00000021c0)=[{{&(0x7f0000000200)={0xa, 0x4e22, 0x0, @mcast1, 0x4}, 0x1c, 0x0, 0x0, &(0x7f0000000880)=[@flowinfo={{0x14, 0x29, 0xb, 0x8001}}, @flowinfo={{0x14}}], 0x30}}, {{0x0, 0x0, &(0x7f0000001d40)=[{&(0x7f0000000900)="d4", 0x1}], 0x1}}], 0x2, 0x20008040)