bin/143976: Version string in userland ppp broken
NathanWard
freebsdbugs at daork.net
Mon Feb 15 23:40:02 UTC 2010
>Number: 143976
>Category: bin
>Synopsis: Version string in userland ppp broken
>Confidential: no
>Severity: non-critical
>Priority: low
>Responsible: freebsd-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Mon Feb 15 23:40:02 UTC 2010
>Closed-Date:
>Last-Modified:
>Originator: NathanWard
>Release: 7.2-RELEASE
>Organization:
Braintrust Ltd.
>Environment:
FreeBSD fbsdng1.braintrust.co.nz 7.2-RELEASE FreeBSD 7.2-RELEASE #0: Fri May 1 08:49:13 UTC 2009 root at walker.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC i386
>Description:
When examining LCP messages transmitted by the userland ppp daemon in FreeBSD, LCP identification messages are sent. These messages contain a freeform string to show what software and version are run on a certain LCP stack.
Here is a dump of one such message:
0000: c0 21 0c 02 00 2e ea 6b 80 28 75 73 65 72 2d 70 .!.....k.(user-p
0010: 70 70 20 33 2e 34 2e 32 20 28 62 75 69 6c 74 20 pp 3.4.2 (built
0020: 43 4f 4d 50 49 4c 41 54 49 4f 4e 44 41 54 45 29 COMPILATIONDATE)
Note the COMPILATIONDATE component - my suspicion is a broken macro somewhere.
>How-To-Repeat:
Capture LCP messages sent by the userland ppp daemon.
These messages are only sent after the remote end responds to the initial CONFREQ - pointing ppp at a dummy serial interface will not cause these messages to be sent.
/etc/ppp/ppp.conf
server:
set ifaddr 10.0.0.1 10.0.0.2 255.255.255.255
set dial
set device "!nc -l 127.0.0.1 5000"
client:
set ifaddr 10.0.0.2 10.0.0.1 255.255.255.255
set dial
set device "!nc 127.0.0.1 5000"
Then run the following in different terminals:
1) tcpdump -s1514 -xX -i lo0 port 5000
2) ppp server
then type open
3) ppp client
then type open
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
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