r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r0, &(0x7f0000000540)={0xa, 0x0, 0x0, @dev}, 0x1c)
setsockopt$inet6_mreq(r0, 0x29, 0x1a, &(0x7f00000002c0)={@mcast1}, 0x14)