r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r0, &(0x7f0000000100)={0xa, 0x0, 0x0, @remote, 0x2}, 0x1c)
r1 = fcntl$dupfd(r0, 0x0, r0)
setsockopt$inet_mreqn(r1, 0x0, 0x20, &(0x7f0000000f40)={@multicast2, @loopback}, 0xc)