On Thu, Apr 24, 2008 at 10:41:00AM +0800, ?????? wrote: > 1. after pppd has negotiated the link, what it tell information to the > kernel network ppp code, which make kernel transmit IP packets > directly? Briefly, in function tty_establish_ppp() in sys-linux.c, an ioctl(2) syscall sets the TTY into PPP discipline (N_PPP). Once the interface is up, the kernel transmits network packets through the PPP link. > 2. where to receive the IP packets from ppp kernel? how to know the > ip packet come from not other device but PPP? I don't understand. It is very clear the packets are from the PPP link because they can be captured from the new network interface. -- James Cameron http://quozl.netrek.org/ HP Open Source, Volunteer http://opensource.hp.com/ PPTP Client Project, Release Engineer http://pptpclient.sourceforge.net/ -- 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
