Bug 7424

Summary:	zd1211rw multicast support
Product:	Networking	Reporter:	Benoit PAPILLAULT (benoit.papillault)
Component:	Wireless	Assignee:	Ulrich Kunitz (kune)
Status:	CLOSED PATCH_ALREADY_AVAILABLE
Severity:	normal	CC:	kune
Priority:	P2
Hardware:	i386
OS:	Linux
Kernel Version:	2.6.18	Subsystem:
Regression:	---	Bisected commit-id:
Bug Depends on:
Bug Blocks:	7425
Attachments:	Patch for multicast support

Description Benoit PAPILLAULT 2006-10-26 13:43:47 UTC

Most recent kernel where this bug did not occur: 2.6.18
Distribution: Debian
Hardware Environment: amd64
Software Environment: GNOME
Problem Description: zd1211rw driver does not support multicast

Steps to reproduce:
1. Run a vlc server sending a video to 239.255.12.42
2. On a wireless client, run vlc udp://@239.255.12.42
3. Run tcpdump on the wireless client
4. The multicast (ethernet and IP) traffic is not going to the client

This properly works with the zd1211 (from http://zd1211.ath.cx) revision 83 driver.

Comment 1 Daniel Drake 2006-10-26 14:27:08 UTC

Is this with an encrypted network?

Comment 2 Benoit PAPILLAULT 2006-10-29 01:44:03 UTC

This is using an open AP (linksys based and other AP as well).

Comment 3 Daniel Drake 2006-11-19 13:08:22 UTC

I think both of my routers aren't doing multicasting. With the vendor driver
(and ipw3945) I tried "ping -b 192.168.0.255" and got no response.

I dumped the frames at the driver level being sent from both vendor driver and
zd1211rw and they matched, including ctrlset. Have not tested whether the frame
is "hitting the air".

Comment 4 Daniel Drake 2006-11-21 20:13:27 UTC

My routers aren't responding to broadcast pings, but I did "echo 0 >
/proc/sys/net/ipv4/icmp_echo_ignore_broadcasts" on another box on the network
and then that one starts responding. This is with a zd1211b.

Do you have other wireless hardware available? Next step would be to put another
device in monitor mode, and use wireshark to see whether the zd1211's broadcast
packets are actually hitting the air.

Comment 5 Benoit PAPILLAULT 2006-11-22 12:22:26 UTC

Problem is not sending multicast packets (multicast packets are sent like normal
data packets), problem is receiving multicast packets. I compared the source
code with the vendor driver, the set_multicast_list is not defined in the
zd1211rw. I tried to adapt the source code ... but failed :-(

Benoit

Comment 6 Benoit PAPILLAULT 2006-11-23 13:57:54 UTC

I just send a diff to the mailing list. multicast and ipv6 are now working
properly. Will the patch be applied in some official tree? if so, which one?
The current patch is based on dsd tree.

Benoit

Comment 7 Daniel Drake 2006-11-25 19:32:06 UTC

Reopening until we have a fix in the development tree

Comment 8 Ulrich Kunitz 2006-11-26 06:58:23 UTC

Created attachment 9628 [details]
Patch for multicast support

This patch should fix the multicast behaviour of the driver.

Comment 9 Ulrich Kunitz 2006-11-27 14:17:42 UTC

Benoit Papillaut confirmed today, that the patch from 2006-11-26 fixes the bug. Many thanks to him for 
raising the issue, demonstrating with a patch how to fix the bug and testing my reworked patch again.

Comment 10 Ulrich Kunitz 2006-11-27 14:19:33 UTC

I had to assign the bug to me, before I could close it.