r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r0, &(0x7f0000000100)={0xa, 0x0, 0x0, @remote, 0x2}, 0x1c)
connect$inet6(r0, &(0x7f0000000300)={0xa, 0x4e1c, 0x0, @ipv4={'\x00', '\xff\xff', @local}}, 0x1c)
r1 = fcntl$dupfd(r0, 0x0, r0)
sendmsg$inet6(r1, &(0x7f00000002c0)={0x0, 0x0, &(0x7f0000000280)=[{&(0x7f0000000bc0)='+', 0x1fc0}], 0x1}, 0x0)