First, my apologies on not monitoring the irc channel. A bit consumed at work. (if anybody happens to know how to get the broadcom bcm4329 driver to change channels in ad-hoc mode, please feel free to share. iwconfig ... channel XX command fails, but driver code looks correct. Target is HTC Desire).
Regarding fragmentation -- this is strictly coming from the UPD/IPv6. It it not fragmenting in the wlan driver. I have fragmentation threshold set off. I'm assuming it is responding to the configuration parameters correctly. I'm using Omnipeek on a PC to sniff the packets. The antennas are about 2 feet apart. The network traffic is relatively low, in the 1 - 10% on average, with virtually no indication of corruption from hidden nodes or other sources under regular operation. That is, I only see the CRC error flags set with the broadcast packets at 802.11g data rates. This is the 802.11 packet CRC, nothing internal to it. The Omnipeek does not know about the batman-adv protocol. Also, I have other nodes setup with batman-adv which are repeating the broadcasts. I can see that only the packets without the CRC error flags are being rebroadcast. This indicates to me that the packets flagged as CRC errors by Omnipeek are also being dropped as error'ed packets by the other nodes. I do not see this problem with packets sent directly to the bcm4329 device. However, I will continue to try to see if I can get that to happen, would then mean it is bcm4329 driver and hardware problem. At the moment, using UDP broadcast with IPv4 directly onto the wlan driver without batman-adv (bat0), I do not see the behavior. I've been using my own code for this. Noticed netcat and nc last night. Will try piping with those tools today in both modes, with and without batman-adv to reverify what I'm seeing. I do not know how to do kernel debugging with kdbg/gdb across a USB port on the target side. I do not have JTAG or serial access. Google'd for how to setup the kernel to use USB port for kdbg, but did not find anything. Just lots of info on how to debug the USB driver itself. I'm using the cyanogenmod version of Android with the HTC Desire version of the Linux kernel, and the insertion of modules like batman-adv. I did verify that the modules are being built against the correct Linux kernel sources, just in case there was something silly going on. I'm building with NETCONSOLE enabled today and hope to be able to see driver messages sent over the WLAN using netcat on the host side. That should allow me to see both batman-adv and the bcm4329 trace messages. I should also be able to send the console to ttyUSB0, assuming I can get the HTC Desire USB to behave properly. I'll change the line to skb_copy as was suggested by <T_x>? and Sven. Will post my results. Thanks for the follow up. David Beberman
