[pptp-server] pppd failing with nothing logged

[Michael St. Laurent]

I'm running PoPToP version 1.1.2 on RedHat 7.0.  During call initiation
everything seems to go fine until it reaches the point of launching pppd.
Actually, that _seems_ to go fine as well as the launch code reports
success.  However, communication through the socket just doesn't happen and
the pppd process does not log anything.  I know that the correct pppd binary
is being used as I replaced it with a little script that logged the
arguments being used and then executes the original binary.

I'm at a loss at this point.

Below is the relevant part of the logfile (note: the one line tagged as pppd
is from the script I wrote, not the daemon itself):

Mar 23 10:40:11 guardian pptpd[4019]: MGR: Launching /usr/sbin/pptpctrl to
handle client
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: local address = 10.127.10.1
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: remote address = 10.127.20.1
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: Client 209.245.72.166 control
connection started
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: Received PPTP Control Message
(type: 1)
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: Made a START CTRL CONN RPLY
packet
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: I wrote 156 bytes to the client.
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: Sent packet to client
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: Received PPTP Control Message
(type: 7)
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: 0 min_bps, 0 max_bps, 32 window
size
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: Made a OUT CALL RPLY packet
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: Starting call (launching pppd,
opening GRE)
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: pty_fd = 4
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: tty_fd = 5
Mar 23 10:40:11 guardian pptpd[4020]: CTRL (PPPD Launcher): Connection speed
= 115200
Mar 23 10:40:11 guardian pptpd[4020]: CTRL (PPPD Launcher): local address =
10.127.10.1
Mar 23 10:40:11 guardian pptpd[4020]: CTRL (PPPD Launcher): remote address =
10.127.20.1
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: I wrote 32 bytes to the client.
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: Sent packet to client
Mar 23 10:40:11 guardian pppd: pppd called with arguments: local 115200
10.127.10.1:10.127.20.1
Mar 23 10:40:11 guardian pptpd[4019]: Error reading from pppd: Input/output
error
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: GRE read or PTY write failed
(gre,pty)=(5,4)
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: Client 209.245.72.166 control
connection finished
Mar 23 10:40:11 guardian pptpd[4019]: CTRL: Exiting now
Mar 23 10:40:11 guardian pptpd[3871]: MGR: Reaped child 4019


--------------------
Michael St. Laurent
Hartwell Corporation