in link_required(): devfd = the_channel->connect(); fd_ppp = the_channel->establish_ppp(devfd); if uses rp-pppoe plugin , I think devfd is the socket fd not the descriptor for "/dev/ppp0" How to explain this? 2008-05-06 发件人： James Cameron 发送时间： 2008-05-06 14:51:16 收件人： cyx_mail@xxxxxxxxxxx 抄送： linux-ppp 主题： Re: about generic_establish_ppp() On Tue, May 06, 2008 at 11:49:29AM +0800, cyx_mail@xxxxxxxxxxx wrote: > in generic_establish_ppp(): > ioctl(fd, PPPIOCATTCHAN, &chindex) > 1.fd, is the parameter fd a channel's file descriptor or the file > descriptor for "/dev/ppp0"? In the PPPIOCATTCHAN, it is the fd opened from /dev/ppp, but in the PPPIOCGCHAN just prior it is the fd of the tty. The same variable is re-used. > 2.chindex, is this a output parameter or input parameter? what is meaning? At that time, input. In the previous ioctl, it is output. This is obvious because of the error messages in each return status check, and because it is used uninitialised first. You would need to read the kernel source to be certain. Read the Documentation/networking/ppp_generic.txt file. Focus on the definition of channels. Then read the ppp_generic.c source, concentrating on the PPPIOCGCHAN and PPPIOCATTCHAN matches. -- James Cameron http://ftp.hp.com.au/sigs/jc/ -- To unsubscribe from this list: send the line "unsubscribe linux-ppp" in the body of a message to majordomo@xxxxxxxxxxxxxxx __________ NOD32 3072 (20080503) Information __________ This message was checked by NOD32 antivirus system. http://www.nod32cn.com ?韬{.n?????%??檩??w?{.n???{炳???骅w* jg????????G??⒏ ⒎?:+v???????? ????＂??????
