r0 = socket$inet6_udp(0xa, 0x2, 0x0)
r1 = dup(r0)
connect$inet6(r1, &(0x7f00000000c0)={0xa, 0x0, 0x0, @mcast2, 0x2}, 0x1c)
r2 = socket$inet_udp(0x2, 0x2, 0x0)
r3 = socket$nl_audit(0x10, 0x3, 0x9)
ioctl$sock_SIOCGIFINDEX(r3, 0x8933, &(0x7f0000000340)={'sit0\x00', <r4=>0x0})
setsockopt$inet_mreqn(r2, 0x0, 0x23, &(0x7f0000000040)={@multicast2, @private, r4}, 0xc)
connect$inet6(r1, &(0x7f0000000200)={0xa, 0x0, 0x0, @ipv4={'\x00', '\xff\xff', @multicast1}}, 0x1c)