r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r0, &(0x7f0000000080)={0xa, 0x20, 0x0, @ipv4={'\x00', '\xff\xff', @dev}}, 0x1c)
sendmmsg$sock(r0, &(0x7f00000046c0)=[{{0x0, 0x0, 0x0}}, {{0x0, 0x0, 0x0, 0x0, &(0x7f00000005c0)=[@mark={{0x14, 0x1, 0x51}}], 0x18}}], 0x2, 0x0)