[Pkg-bluetooth-maintainers] Bug#514980: bluetooth: pand daemon stops responding after a certain amount of data sent

[laimoriel]

Package: bluetooth
Version: 3.36-3
Severity: normal



-- System Information:
Debian Release: 5.0
  APT prefers testing
  APT policy: (500, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.26-1-amd64 (SMP w/2 CPU cores)
Locale: LANG=pl_PL.UTF-8, LC_CTYPE=pl_PL.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/bash

Versions of packages bluetooth depends on:
ii  bluez-utils                   3.36-3     Bluetooth tools and daemons

bluetooth recommends no packages.

bluetooth suggests no packages.

-- debconf-show failed

I attempt to build a simple PAN with two computers (a desktop and a 
notebook). I have three different
USB Bluetooth dongles, one of them is Pentagram Fang Compact, second one 
is a no-name and the third one
a Billionton dongle.

The devices discover each other and can pair as well. I run pand on the 
desktop system, using:
pand --listen --role=NAP --devup=/etc/bluetooth/dev-up
where my desktop dev-up script is:
#!/bin/sh
echo 1 > /proc/sys/net/ipv4/ip_forward
ifconfig bnep0 192.168.0.1 netmask 255.255.255.248 up
iptables -t nat -A POSTROUTING -s 192.168.0.0/29 -j MASQUERADE

On the notebook system I run pand with:
pand --role=PANU --connect 00:11:67:cf:a1:f7 
--devup=/etc/bluetooth/pan/dev-up
where my notebook dev-up script is:
#!/bin/sh
ifconfig bnep0 192.168.0.2 netmask 255.255.255.248 up
route add default gw 192.168.0.1

Both of the devices create & configure bnep0 interface and connect 
properly. From my notebook I can
access the desktop (ping 192.168.0.1) as well as internet (ping 
google.pl). I can even use a browser.
But only a limited set of webpages works properly (i.e. google.pl, 
wikipedia.pl). They can be
browsed on and on for a long time. Other pages (i.e. onet.pl, wp.pl, 
gazeta.pl) immediately cause the
connection to hang. Internet becomes unaccessible, the computers can no 
longer
ping each other, furthermore the services on the desktop computer become 
undiscoverable. Only
unplugging & replugging the desktop dongle and restarting bluetooth 
service helps. It is not a browser
issue, I tried several browsers with no effect.

What is more, a simple apt-get update also causes the connection to 
hang. Even with Windows 2000 with
Bluesoleil driver running on the notebook I get exactly the same issue: 
connection starts, some pages
load properly and then everything freezes.

What I also tried was connecting to the internet with a ssh tunnel using 
local socks proxy for the
browser. Unfortunately, this only prolonges the connection lifetime a 
little. It hangs at some point
nevertheless.

Interestingly, I noticed, that leaving the connection open without 
sending any considerable data
doesn't freeze the connection. For example, from my notebook I can ping 
any internet domain as long as I wish to.

Hcidump on both computers doesn't report any errors. The packets simply 
flow correctly until at some
point the transmission stops. No error messages in /var/log/syslog or in 
dmesg. Not a single one.
Running pand with --nodetach option also gives no clue.

Of course I tried several howtos from the internet, tried to play with 
bluetooth config on both
computers (hcid.conf from desktop attached), to switch dongles, to 
manually set-up the bnep interfaces, to modify iptables config on
my desktop. No effect.

Best regards
Marcin

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