squid3@xxxxxxxxxxxxx wrote: > Greetings, > > Pardon if this is a dumb question. But I have searched the web, and the > source code for a solution to this one and have reached a brick wall. > > I'm upgrading a user-space proxy (squid3) which has in the past done > transparent connections under IPv4-only using SO_ORIGINAL_DST. > > The Firewall/router uses iptables and REDIRECT port 80 outbound to port > 81. All is fine and dandy when squid listens on 0.0.0.0:81. > > With the new code I have to use an IPv6 socket ( [::]:81 ) as the > receiver. With that getsockopt(..., SO_ORIGINAL_DST, ...) always returns > err "92 Protocol not supported." regardless of the IP-level parameters > passed in. > > NOTE: All traffic for testing so far has been from IPv4 clients to what > they think is an IPv4 server, but with a dual-enabled middleman. The > 'middleman' Software is iptables 1.3.6 on Debian 2.6.21-2-486 (unstable), > squid3 built with g++ 4.1.3. You're right, nf_conntrack_ipv4 only registeres SO_ORIGINAL_DST for AF_INET, changing that should make it work I believe. I feel like I'm missing something though ..
