r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r0, &(0x7f0000000000)={0xa, 0x4e20, 0x0, @ipv4={'\x00', '\xff\xff', @local}}, 0x1c)
setsockopt$sock_int(r0, 0x1, 0x29, &(0x7f0000000080)=0x7, 0x4)
sendmmsg$inet6(r0, &(0x7f0000004d00), 0x2f, 0x0)