r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r0, &(0x7f0000000600)={0xa, 0x0, 0x0, @dev, 0x1}, 0x1c)
connect$inet6(r0, &(0x7f00000000c0)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @multicast1}}, 0x1c)
setsockopt$inet6_mreq(r0, 0x29, 0x1b, &(0x7f0000000380)={@rand_addr=' \x01\x00'}, 0x14)
setsockopt$inet6_IPV6_ADDRFORM(r0, 0x29, 0x1, &(0x7f0000000040), 0x4)