From nobody  Mon Nov  9 12:00:58 1998
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Date: Mon, 9 Nov 1998 12:00:58 -0800 (PST)
From: igor@apb.dn.ua
To: freebsd-gnats-submit@freebsd.org
Subject: TCP packet via SLIP/CSLIP containing this 4 bytes (0x2b,0x2b,0xab,0x00) drops
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>Number:         8633
>Category:       kern
>Synopsis:       TCP packet via SLIP/CSLIP containing this 4 bytes (0x2b,0x2b,0xab,0x00) drops
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          closed
>Quarter:        
>Keywords:       
>Date-Required:  
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Nov  9 12:10:01 PST 1998
>Closed-Date:    Sat Mar 2 09:19:43 PST 2002
>Last-Modified:  Sat Mar 02 09:20:39 PST 2002
>Originator:     Igor N Indick
>Release:        2.2.6-RELEASE
>Organization:
Bank Ukraina
>Environment:
FreeBSD ns.apb.dn.ua 2.2.6-RELEASE FreeBSD 2.2.6-RELEASE #0: Mon Nov  9 18:51:08 EET 1998
igor@ns.apb.dn.ua:/usr/src/sys/compile/CUSTOM  i386
>Description:
Any TCP packet containing this 4 bytes (0x2b,0x2b,0xab,0x00) does not pass
through SLIP/CSLIP in or out. In GENERIC kernel it seems to be Ok.
diff GENERIC CUSTOM is:
21,23c21,24
< ident		GENERIC
< maxusers	10
< 
---
> ident		CUSTOM
> maxusers	100
> options         CHILD_MAX=1000
> options         OPEN_MAX=1000
27d27
< options		NFS			#Network Filesystem
47,48d46
< disk		fd1	at fdc0 drive 1
< tape		ft0	at fdc0 drive 2
62d59
< device		wfd0		#IDE floppy (LS-120)
125,126d121
< device		apm0    at isa?	disable	# Advanced Power Management
< options		APM_BROKEN_STATCLOCK	# Workaround some buggy APM BIOS
134,135c129,130
< device		sio2	at isa? disable port "IO_COM3" tty irq 5 vector siointr
< device		sio3	at isa? disable port "IO_COM4" tty irq 9 vector siointr
---
> device		sio2	at isa? port "IO_COM3" tty irq 5 vector siointr
> device		sio3	at isa? port "IO_COM4" tty irq 9 vector siointr
137,139c132,134
< device		lpt0	at isa? port? tty irq 7 vector lptintr
< device		lpt1	at isa? port? tty
< device		mse0	at isa? port 0x23c tty irq 5 vector mseintr
---
> device		lpt0	at isa? disable port? tty irq 7 vector lptintr
> device		lpt1	at isa? disable port? tty
> device		mse0	at isa? disable port 0x23c tty irq 5 vector mseintr
141c136
< device		psm0	at isa? port "IO_KBD" conflicts tty irq 12 vector psmintr
---
> device		psm0	at isa? disable port "IO_KBD" conflicts tty irq 12 vector psmintr
165,166c160
< pseudo-device	sl	1
< pseudo-device	ppp	1
---
> pseudo-device	sl	4
168d161
< pseudo-device	tun	1
175d167
< options		KTRACE		#kernel tracing

>How-To-Repeat:
Compile kernel CUSTOM (see above),
and try to send file containing (0x2b,0x2b,0xab,0x00) with FTP,HTTP 
via SLIP/CSLIP interface, in or out FreeBSD box.
>Fix:

>Release-Note:
>Audit-Trail:

From: David Greenman <dg@root.com>
To: igor@apb.dn.ua
Cc: freebsd-gnats-submit@FreeBSD.ORG
Subject: Re: kern/8633: TCP packet via SLIP/CSLIP containing this 4 bytes (0x2b,0x2b,0xab,0x00) drops 
Date: Mon, 09 Nov 1998 12:21:21 -0800

 >Any TCP packet containing this 4 bytes (0x2b,0x2b,0xab,0x00) does not pass
 >through SLIP/CSLIP in or out. In GENERIC kernel it seems to be Ok.
 
    Hmmm, 0x2b is a plus (+), and 0xab with the high bit off is 0x2b as
 well...are you perhaps triggering your modem into going into command mode?
 
 -DG
 
 David Greenman
 Co-founder/Principal Architect, The FreeBSD Project
State-Changed-From-To: open->feedback 
State-Changed-By: iedowse 
State-Changed-When: Sun Dec 2 10:16:46 PST 2001 
State-Changed-Why:  

Does this still occur? It is almost certainly a modem configuration 
issue, not a slip problem though. 

http://www.FreeBSD.org/cgi/query-pr.cgi?pr=8633 
State-Changed-From-To: feedback->closed 
State-Changed-By: iedowse 
State-Changed-When: Sat Mar 2 09:19:43 PST 2002 
State-Changed-Why:  

Feedback timeout. 

http://www.FreeBSD.org/cgi/query-pr.cgi?pr=8633 
>Unformatted:
