r0 = socket$inet6_udp(0xa, 0x2, 0x0)
sendmmsg$inet6(r0, &(0x7f0000002380)=[{{&(0x7f00000000c0)={0xa, 0x4e22, 0x0, @mcast1}, 0x1c, 0x0}}, {{&(0x7f0000000240)={0xa, 0x4e23, 0x0, @private0}, 0x1c, 0x0, 0x0, &(0x7f0000000680)=[@flowinfo={{0x14, 0x29, 0xb, 0x1f}}, @flowinfo={{0x14, 0x29, 0xb, 0xfffffffa}}], 0x30}}], 0x2, 0x0)