pppd line discipline

amightywind · Posted: Thu Jun 03, 2004 1:49 pm Post subject: pppd line discipline

Everyone,

I installed pppd-2.4.1 from the Gentoo 2004.1 CD. I configured it for
a US Robotics PCI modem. I tried to connect to my ISP, the same
configuration as my iMac running YellowDog, and get the following messages from syslog:

Jun 1 15:24:46 ion pppd[2148]: pppd 2.4.1 started by root, uid 0
Jun 1 15:24:46 ion pppd[2148]: Using interface ppp0
Jun 1 15:24:46 ion pppd[2148]: local IP address 10.64.64.64
Jun 1 15:25:07 ion pppd[2148]: Starting link
Jun 1 15:25:08 ion chat[2175]: abort on (BUSY)
Jun 1 15:25:08 ion chat[2175]: abort on (ERROR)
Jun 1 15:25:08 ion chat[2175]: abort on (NO ANSWER)
Jun 1 15:25:08 ion chat[2175]: abort on (NO CARRIER)
Jun 1 15:25:08 ion chat[2175]: abort on (NO DIALTONE)
Jun 1 15:25:08 ion chat[2175]: abort on (Invalid Login)
Jun 1 15:25:08 ion chat[2175]: abort on (Login incorrect)
Jun 1 15:25:08 ion chat[2175]: send (ATZ^M)
Jun 1 15:25:08 ion chat[2175]: expect (OK)
Jun 1 15:25:08 ion chat[2175]: ATZ^M^M
Jun 1 15:25:08 ion chat[2175]: OK
Jun 1 15:25:08 ion chat[2175]: -- got it
Jun 1 15:25:08 ion chat[2175]: send (ATDT4404032^M)
Jun 1 15:25:09 ion chat[2175]: expect (CONNECT)
Jun 1 15:25:09 ion chat[2175]: ^M
Jun 1 15:25:42 ion chat[2175]: ATDT4404032^M^M
Jun 1 15:25:42 ion chat[2175]: CONNECT
Jun 1 15:25:42 ion chat[2175]: -- got it
Jun 1 15:25:42 ion chat[2175]: send (^M)
Jun 1 15:25:42 ion chat[2175]: timeout set to 5 seconds
Jun 1 15:25:42 ion chat[2175]: expect (~)
Jun 1 15:25:42 ion chat[2175]: 28800/ARQ/V34/LAPM/V42BIS^M
Jun 1 15:25:42 ion chat[2175]: ^M
Jun 1 15:25:42 ion chat[2175]:
Jun 1 15:25:42 ion chat[2175]: Level 3 Comm nas15.kac1 UQKT2^M
Jun 1 15:25:42 ion chat[2175]: ^M
Jun 1 15:25:42 ion chat[2175]: ^M
Jun 1 15:25:47 ion chat[2175]: alarm
Jun 1 15:25:47 ion chat[2175]: send (^M)
Jun 1 15:25:47 ion chat[2175]: send (^M)
Jun 1 15:25:47 ion pppd[2148]: Serial connection established.
Jun 1 15:25:47 ion pppd[2148]: Couldn't set tty to PPP discipline: Invalid argument
Jun 1 15:25:47 ion pppd[2148]: Hangup (SIGHUP)
Jun 1 15:25:52 ion pppd[2148]: Starting link
Jun 1 15:25:53 ion chat[2177]: abort on (BUSY)
Jun 1 15:25:53 ion chat[2177]: abort on (ERROR)
Jun 1 15:25:53 ion chat[2177]: abort on (NO ANSWER)
Jun 1 15:25:53 ion chat[2177]: abort on (NO CARRIER)
Jun 1 15:25:53 ion chat[2177]: abort on (NO DIALTONE)
Jun 1 15:25:53 ion chat[2177]: abort on (Invalid Login)
Jun 1 15:25:53 ion chat[2177]: abort on (Login incorrect)
Jun 1 15:25:53 ion chat[2177]: send (ATZ^M)
Jun 1 15:25:53 ion chat[2177]: expect (OK)
Jun 1 15:25:54 ion chat[2177]: ATZ^M^M
Jun 1 15:25:54 ion chat[2177]: OK
Jun 1 15:25:54 ion chat[2177]: -- got it
Jun 1 15:25:54 ion chat[2177]: send (ATDT4404032^M)
Jun 1 15:25:54 ion chat[2177]: expect (CONNECT)
Jun 1 15:25:54 ion chat[2177]: ^M
Jun 1 15:26:26 ion chat[2177]: ATDT4404032^M^M
Jun 1 15:26:26 ion chat[2177]: CONNECT
Jun 1 15:26:26 ion chat[2177]: -- got it
Jun 1 15:26:26 ion chat[2177]: send (^M)
Jun 1 15:26:26 ion chat[2177]: timeout set to 5 seconds
Jun 1 15:26:26 ion chat[2177]: expect (~)
Jun 1 15:26:26 ion chat[2177]: 28800/ARQ/V34/LAPM/V42BIS^M
Jun 1 15:26:26 ion chat[2177]: ^M
Jun 1 15:26:26 ion chat[2177]:
Jun 1 15:26:26 ion chat[2177]: Level 3 Comm nas18.kac1 UQKT2^M
Jun 1 15:26:26 ion chat[2177]: ^M
Jun 1 15:26:26 ion chat[2177]: ^M
Jun 1 15:26:31 ion chat[2177]: alarm
Jun 1 15:26:31 ion chat[2177]: send (^M)
Jun 1 15:26:31 ion chat[2177]: send (^M)
Jun 1 15:26:31 ion pppd[2148]: Serial connection established.
Jun 1 15:26:31 ion pppd[2148]: Couldn't set tty to PPP discipline: Invalid argument
Jun 1 15:26:32 ion pppd[2148]: Hangup (SIGHUP)

I have traced the error to a line in pppd:sys-linux.c which sets ttyS4 (the modem) to PPP discipline. I am running Linux 2.4.25 with PPP support
compiled in (not modules). Has anyone seen something like this before?
Any ideas? Thanks.
_________________
amightywind

pakman · Tux's lil' helper Joined: 06 Jan 2004 Posts: 100

I seem to remember getting this when I didn't have the options:

amightywind · Posted: Wed Jun 09, 2004 12:36 pm Post subject:

All,

For anyone having similar problems getting PPP to work with LiveCD 2004.1: I did these things to solve the problem.

1. emerge ppp-2.4.2 so that the version number matched the ppp kernel
module version number. Since I didn't have a functioning network and
ppp-2.4.2.tar.gz was not on the LiveCD I had to put it in /usr/portage/distfiles by hand using a floppy.

2. Used this configuration in compiling Linux 2.4.25:

cat /usr/src/linux/.config | grep PPP
CONFIG_PPP=m
# CONFIG_PPP_MULTILINK is not set
CONFIG_PPP_FILTER=y
CONFIG_PPP_ASYNC=m
CONFIG_PPP_SYNC_TTY=m
CONFIG_PPP_DEFLATE=m
CONFIG_PPP_BSDCOMP=m
CONFIG_PPPOE=m

The key here seems to be NOT configuring MULTILINK. I found this on
another post about PPP on this forum.
_________________
amightywind