r0 = socket$inet6_udp(0xa, 0x2, 0x0)
connect$inet6(r0, &(0x7f0000000040)={0xa, 0x0, 0x0, @mcast1, 0x2}, 0x1c)
setsockopt$sock_int(r0, 0x1, 0x19, 0x0, 0x0)