r0 = socket$inet6_udp(0xa, 0x2, 0x0)
setsockopt$inet6_mreq(r0, 0x29, 0x1a, &(0x7f0000000040)={@private2}, 0x14)
sendmmsg$inet6(r0, &(0x7f0000001180)=[{{&(0x7f0000000000)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @broadcast}}, 0x1c, 0x0}}], 0x1, 0x0)