isdn connection no longer transmits packets

[Oliver Neukum]

Hi,

this is a bug report concerning isdn and/or general networking.

During an established isdn connection to my isp the connection stops
transmitting but stays up. It seems to happen randomly.
I have no other network devices.

This happens on the kernels 2.3.37, 2.3.39 and 2.3.40-pre6 (2.3.38 didn't
compile).

There were no packets transmitted during the breakdown (tcpdump showing nothing,
flat line on the isdn monitoring programm) ifconfig was odd, it showed both
ippp0 and ippp1. ippp1 was active, but the netmask was wrong.

This happened with a Fritz!PCI isdn-card on euro-isdn. All drivers were
compiled into the kernel. No modules were used.

ipppd version i2.2 patch level 10anubis
isdnctrl version 3.1beta7

netstat showed :

Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State      
tcp        0      0 0.0.0.0:1024            0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:40001           0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:513             0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:514             0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:515             0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:20005           0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:37              0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:110             0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:79              0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:143             0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:111             0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:6000            0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:113             0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:21              0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:6711            0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:119             0.0.0.0:*               LISTEN      
tcp        0      0 0.0.0.0:23              0.0.0.0:*               LISTEN      
tcp        0     15 129.187.25.211:1158     129.187.10.68:110       FIN_WAIT1   
tcp        0      0 127.0.0.1:1159          127.0.0.1:119           ESTABLISHED 
tcp        0      0 127.0.0.1:119           127.0.0.1:1159          ESTABLISHED 
tcp        0      7 129.187.25.211:1157     129.187.14.112:119      FIN_WAIT1   
tcp        1      0 129.187.26.61:1063      206.168.112.90:80       CLOSE_WAIT  
tcp        1      0 129.187.26.61:1064      206.168.112.90:80       CLOSE_WAIT  

/proc/route:

Iface	Destination	Gateway 	Flags	RefCnt	Use	Metric	Mask		MTU	Window	IRTT                                                       
ippp0	0100A8C0	00000000	0005	0	0	0	FFFFFFFF	40	0	0                                                                             
ippp1	0000BB81	00000000	0001	0	0	0	0000FFFF	40	0	0                                                                             
lo	0000007F	00000000	0001	0	0	0	000000FF	40	0	0                                                                                
ippp1	00000000	F918BB81	0002	0	0	0	00000000	40	0	0     



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