Zyxel Linux firmware sources

[Peter]

The $subj are not to be found. New vdsl Zyxel modem supplied by local telco
(Romania) has linux 2.6.21.x on it, a BCM CPU and no trace of GPL message or
source download. A firmware image exists online, with no comments and no
licenses. The kernel build time is forzen with a CF timezone (Likely Canadian
Francais...). 

Any ideas where sources can be located? The modem has serious bugs and I need to
fix it asap. More data:

# cat /proc/cpuinfo
system type             : 96368VVW
processor               : 0
cpu model               : BCM6368 V3.1
BogoMIPS                : 398.95
wait instruction        : no
microsecond timers      : yes
tlb_entries             : 32
extra interrupt vector  : no
hardware watchpoint     : no
ASEs implemented        :
VCED exceptions         : not available
VCEI exceptions         : not available

unaligned exceptions            : 6690367

# cat /proc/version
Linux version 2.6.21.5 (kuanjung at moses) (gcc version 4.2.3) #1 Wed Jul 1
19:31:37 CST 2009

Additionally it seems that the software is a seriously crippled busybox with no
license message anywhere, and with ls and other key commands removed to avoid
inspection.

The binary only 'firmware' from the maker's website contains a pdf manual which
makes mention of kernel 2.6.21.5 and has no GPL anywhere in it, but boldly
claims that

"
  Date: Nov 25, 2009
  Author: KuanJung Tung
  Reviewer: Jerry Chang

  THIS DOCUMENT CONTAINS PROPRIETARY TECHNICAL INFORMATION THAT IS THE
  PROPERTY OF THE ZyXEL AND SHOULD NOT BE DISCLOSED TO OTHERS IN WHOLE OR IN
  PART, REPRODUCED, COPIED, OR USED AS BASIS FOR DESIGN, MANUFACTURING OR SALE
  OF APPARATUS WITHOUT WRITTEN PERMISSION OF ZyXEL.
"

and later in the same manual:

"
Versions:
Bootbase version: V1.10 | 09/30/2009
Firmware version: 101AWZ6
Kernel version: 2.6.21.5
DSL code version: A2pv6bC012d.d21k5
WLAN code version: 5.10.85.0.cpe4.402.8
"

Monsieur KuanJung Tung please stand up and be counted.

tia,

-- Peter


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