This is somewhat different from my other question and is on a different system and of course the person who developed it left. There is a mobile phone which connects to a CDMA BTS and then from there to a Linux machine. A process called pdsn is running on the linux machine and detects when the mobile phone calls. It then spawns a process with a bunch of parameters (port, ip, etc) like this pppd pty 'ppp_relay -p port -a address ...' So pppd uses ppp_relay (which is also something he wrote) to handle the ppp stuff. Now this worked on Red Hat 9 but there seems to be a problem on CentOS 4.5. >From what I can tell, ppp_relay receives a TCP port number (I guess from pdsn?) and tries to communicate to the pppd process through this port. It sends a message but never gets a response. I am curious how the pppd pty process (in this case ppp_relay) communicates to pppd? We did a netstat and found pppd but no TCP nor UDP ports were associated with it. It was just a UNIX-type process. Is ppp_relay attempting to talk through a port when it should be using some kind of Linux message? -- To unsubscribe from this list: send the line "unsubscribe linux-ppp" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
