r0 = socket$inet6_udp(0xa, 0x2, 0x0)
sendmmsg$inet6(r0, &(0x7f0000003d80)=[{{&(0x7f00000000c0)={0xa, 0x4e21, 0x0, @mcast2, 0x5}, 0x1c, 0x0, 0x0, &(0x7f00000001c0)=[@rthdrdstopts={{0x18}}, @flowinfo={{0x14, 0x29, 0xb, 0x8}}], 0x30}}, {{0x0, 0x0, &(0x7f0000000600)=[{&(0x7f0000000280)="1b", 0x1}], 0x1}}], 0x2, 0x8005)