Hello, I've been trying to implement queuing and 'accept' in my protocol for few weeks. The way 'accept' should work is still not clear for me: We have a socket s and we do the following in the server: 1. listen(s) -- thus s->sk_state = TCP_LISTEN. 2. accept(s) -- put a process into sleep. ... 3. receiving function gets an 'init' packet and looks for a socket which matches packet's destination. The lookup returns s (!). 4. I put s on a queue (sk->tp_pinfo.af_tcp.accept_queue) and wake up the process (why to put s itself on it's own queue?). 5. accept resumes, grabs first socket from the queue (s) and changes its' state to TCP_ESTABLISHED and returns it to inet_accpet. (but this is the same socket we've been listening on:( ). 6. inet_accept grafts s into a new socket(ok), but s is now in TCP_ESTABLISHED state, instead of TCP_LISTEN, which ruins next connection. How to keep the listening state and return the valid socket to inet_accept, without messing with inet_accept itself? My problem is the socket I am listening on and to which the 'init' packet is destinated are the same. Thanks for anything. -marek -- Kernelnewbies: Help each other learn about the Linux kernel. Archive: http://mail.nl.linux.org/kernelnewbies/ FAQ: http://kernelnewbies.org/faq/
