r0 = socket$inet6_tcp(0xa, 0x1, 0x0)
sendmsg$inet6(r0, &(0x7f0000001480)={&(0x7f0000000040)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @dev}}, 0x1c, 0x0}, 0x20001001)