More on the Orinoco + XI-825 + StrongARM platform...

[Ben Greear]

Martijn van Oosterhout wrote:

> On Tue, Feb 19, 2002 at 09:51:43PM -0700, Ben Greear wrote:
> 
>>The interesting thing is that when I ping between the other machines, I
>>see packets received on the cube.  When I ping from the cube to the laptop,
>>while sniffing the wireless port on the laptop with tcpdump, I see this:
>>
>>
>>[time-stamp] 0:60:b3:69:56:67 > Broadcast null I (s=85,r=85,C) len=50
>>(more of the same)
>>
> 
> Was there not something about structure padding that caused some structures
> to be padded differently on Arms than on other architectures, causing
> transmitted packets to be unreadable to anyone else?
> 
> I beleive it was fixed in a more recent version, the one shipped with the
> kernel source is pretty old now.


I'll check that out in just a second (or maybe tomorrow :)

I put in some prints deep in the driver in the orinoco_xmit method:


                if (1) {
                   int i = 0;
                   const unsigned char* dbg = (const unsigned char*)(&hdr);
                   for (i = 0; i<(sizeof(hdr)); i++) {
                      printk("%02hx ", (unsigned short)(dbg[i]));
                   }
                   printk("\n");
                }
		err  = hermes_bap_pwrite(hw, USER_BAP, &hdr, sizeof(hdr),
					 txfid, 0);


I see this printed out...it should be an arp from what I can tell:

Feb 20 06:46:46 CerfLinux kern.warn eh->h_proto: 0x608  ntohs: 0x806
Feb 20 06:46:46 CerfLinux kern.warn Ethernet-II frame, len: 60, sizeof(hdr)...
Feb 20 06:46:46 CerfLinux kern.warn 00 00 00 00 00 00 00 00 00 00 00 00 06 00 08 00 00 00 ff ff ff ff ff ff 00 60 b3 69 56 67 00 00 00
00 00 00 00 00 00 00 00 00 00 00 44 00 ff ff ff ff ff ff 00 60 b3 69 56 67 00 44 00 00 aa aa 03 00 00 00 08 06

It really doesn't look too correct to me!


I also receive this packet every now and then...not sure what it's supposed to
be.  This is for code that prints out 'hdr' in __orinoco_ev_rx:

Feb 20 06:48:46 CerfLinux kern.warn ERROR: rx pkt failed for some reason, hdr: (len: 70)
Feb 20 06:48:46 CerfLinux kern.warn 05 2e 50 31 6a 71 13 36 14 00 03 00 00 00 a6 73 52 b8 d8 73 7a 70 31 3c 58 49 c4 44 c6 3a 52 9d 14
6d 89 44 7c e0 28 e0 a2 96 78 ee 00 00 af a0 90 69 ad 40 fd 40 b0 be 6a 05 00 00 06 09 04 00 12 02 22 02 12 02


Thanks for the link,
Ben


> 
> http://ozlabs.org/people/dgibson/dldwd/
> 
> HTH,
> 


-- 
Ben Greear <greearb at candelatech.com>       <Ben_Greear AT excite.com>
President of Candela Technologies Inc      http://www.candelatech.com
ScryMUD:  http://scry.wanfear.com     http://scry.wanfear.com/~greear