Our ISP, MWeb, gave us a free router and Wifi extender (WRE2205v2) as part of a new promotion. Neither of them really work at all (the extender works for about a minute then fails for no apparent reason). Acording to reviews, it should be a decent repeater, but it seems Mweb has completely screwed up the firmware.
This blog post shows how to get very basic root access (it's running embedded Linux) on the device (the security is... bad). So far I've worked out it's a MIPS device (running
file on an executable gives
ELF 32-bit MSB executable, MIPS, MIPS-I version 1 (SYSV) and the file system is squash-fs, so read only. I can also copy files to/from the device using tftp.
I also know that both the branded firmware and the stock firmware use a binary called fw_upgrade to flash a new firmware. I tried decompiling them using http://decompiler.fit.vutbr.cz/decompilation/ but I haven't had much luck there. The branded one has a bit more code which I assume checks something about the new firmware and prevents the stock firmware from being flashed. Finally I tried copying the stock fw_upgrade to the device and running it but it fails without an error message.
What else can I do to get the stock firmware running?