Here is the reference to the code allowing to receive frames with wrong
FCS (bad CRC): <ftp://fly.isti.cnr.it/pub/software/linux/orinoco/>.
The code is based on the 0.13e driver version, plus the monitor mode
patch, plus the Dragorn patch. It adds a simple patch for enabling an
"ignore_crc" mode using the iwpriv interface: iwpriv ignore_crc 0|1.
I also tried starting from the more recent 0.14alpha[12] and 0.15rc[12]
drivers, but with my 2.4.30 kernel the 0.14 will not compile:
orinoco_cs.c:642: error:
variable `orinoco_driver' has initializer but incomplete type
and 0.15 compiles but generates a kernel error as soon as ifconfig is
called:
Unable to handle kernel NULL pointer dereference at virtual address 00000000
e084300d
*pde = 00000000
Oops: 0002
CPU: 0
EIP:
0010:[uhci:__insmod_uhci_O/home/lib.modules/2.4.30-pre2-pr-hrt-1kHz-1/+-884723/96]
Tainted: PF
EFLAGS: 00010246
eax: 00000000 ebx: d15ff800 ecx: 00000000 edx: 000048ad
esi: c0320df4 edi: d86cbca0 ebp: c0320d80 esp: cd7a1e84
ds: 0018 es: 0018 ss: 0018
Process ifconfig (pid: 2678, stackpage=cd7a1000)
Stack: d86cbca0 c0320df4 c0320d80 cd7a1ea4 d15ff800 000048ad 00000000 e0843000
c0228b5c d15ff800 d86cbca0 00000000 c03211c8 ce3b7a64 ce3b7a1c d86cbca0
c025d622 d15ff800 c0320d80 00000000 d96aa3e0 d15ff800 00000000 ce3b79c0
Call Trace: [neigh_parms_alloc+100/236] [inetdev_init+158/376]
[inet_set_ifa+82/184] [devinet_ioctl+1225/1676]
[inet_ioctl+316/508] [sock_ioctl+88/116]
[sys_ioctl+571/644] [error_code+52/64] [system_call+51/56]
Code: 10 00 00 00 00 00 00 01 00 00 00 03 00 00 00 02 00 00 00 f0
Using defaults from ksymoops -t elf32-i386 -a i386
>>ebx; d15ff800 <_end+11243c48/205474a8>
>>esi; c0320df4 <arp_tbl+74/12c>
>>edi; d86cbca0 <_end+183100e8/205474a8>
>>ebp; c0320d80 <arp_tbl+0/12c>
>>esp; cd7a1e84 <_end+d3e62cc/205474a8>
Code; 00000000 Before first symbol
00000000 <_EIP>:
Code; 00000000 Before first symbol
0: 10 00 adc %al,(%eax)
Code; 00000002 Before first symbol
2: 00 00 add %al,(%eax)
Code; 00000004 Before first symbol
4: 00 00 add %al,(%eax)
Code; 00000006 Before first symbol
6: 00 01 add %al,(%ecx)
Code; 00000008 Before first symbol
8: 00 00 add %al,(%eax)
Code; 0000000a Before first symbol
a: 00 03 add %al,(%ebx)
Code; 0000000c Before first symbol
c: 00 00 add %al,(%eax)
Code; 0000000e Before first symbol
e: 00 02 add %al,(%edx)
Code; 00000010 Before first symbol
10: 00 00 add %al,(%eax)
Code; 00000012 Before first symbol
12: 00 f0 add %dh,%al
-------------------------------------------------------
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