Hi Jeho, I applied the patch available at " http://mail-archives.apache.org/mod_mbox/httpd-dev/201002.mbox/%[email protected]%3E"; given by Nicolas Normand.
Well, after researching (or I should say playing) a bit in with apache source code, I can say that proxy server could bind to the non-local IPv4 mapped address as long as the socket is AF_INET6. The problem I am facing over here is, Apache is able to bind to an ipv6 socket and accepts ipv4 connections on it. ********************************************************** addr.sin6_family = AF_INET6; addr.sin6_port = htons(portnum); inet_pton(AF_INET6, "0::0", &addr.sin6_addr) bind(sd, (struct sockaddr*)&addr, sizeof(addr)) != 0 ) listen(sd, 15) != 0 ) ********************************************************** Due to this, web traffic coming from the IPv4 client is converted to the "IPv4 mapped address" traffic . So, when I bind it to the non-local IP prior to connect() to the origin server the bind couldn't understand the IPv4 mapped address as the other socket opened for server side is a AF_INET(I requested IPv4 address from the client) and transparency fails. Regards, Puneet Mohan This results in IPv4 mapped addresses in the access.log like "::ffff:127.0.0.1 On Tue, Mar 1, 2011 at 4:23 PM, JeHo Park <[email protected]> wrote: > Hello Puneet Mohan, > > 2011-03-01 오후 6:51, Puneet Mohan 쓴 글: > > >> Hi Jeff Trawick, >> >> I am presently implementing transparency in Apache source code. So the >> strange thing I noticed that while binding to a non-local IP prior to >> connect (), the remote addr(i.e. the client_addr) it binds to is in the IPv4 >> mapped address whereas the socket descriptor created is IPv4 type only. >> >> did you apply tproxy version2 to your apache proxy code ? > if so, i wonder whether tproxy2 core can support IPv4 mapped IPv6 address > or not > > > > As a result of this I couldn’t able to bind to the non-local IP. >> >> >> The work around I tried is manipulating the bits of IPv4 mapped address, >> but I don’t feel it to be convincing. >> >> >> Regards, >> >> Puneet Mohan >> >> >
