Since my box has an USB port, I was missing a way to umount mounted usb storage. Looking deeper into it, I noticed that partitions get mounted by ‘/etc/hotplug.d/usb/01-mount’ like this:

# mount
[...]
part1 on /mnt/disc0_1 type ext3 (rw)
part2 on /mnt/disc0_2 type vfat (rw)

The correct devices are missing. A patch is available:

mount.patch

Okay … So far, so good. Now some tweaking to webif^2 for umounting attached usb storage devices. Here comes the patch:

umount-button.patch

So … after more than one hour googling I found the following in the broadcom kernel module source:

if (val && strstr(v, "psk")) {
val = (strstr(v, "psk2") ? 0x84 : 0x4);
v = nvram_safe_get(wl_var("wpa_psk"));
if ((strlen(v) >= 8) && (strlen(v) < 63)) {

bcom_ioctl(skfd, ifname, WLC_SET_WPA_AUTH, &val, sizeof(val));

if (nvram_match(wl_var("mode"), "wet")) {
/* Enable in-driver WPA supplicant */
wsec_pmk_t pmk;

pmk.key_len = (unsigned short) strlen(v);
pmk.flags = WSEC_PASSPHRASE;
strcpy(pmk.key, v);
bcom_ioctl(skfd, ifname, WLC_SET_WSEC_PMK, &pmk, sizeof(pmk));
bcom_set_int(skfd, ifname, "sup_wpa", 1);
}
}
}

So … this means, that the WPA-PSK length has to be >= 8 and < 63, mine was 65. This wasn´t a problem yet, cause I used the routers only in AP mode, where this restriction doesn't effect. Shorting the WPA-PSK length 62 did the trick!

Successfull was the following modifications to factory (linksys) defaults:

nvram set vlan0ports=”0 1 2 5*”
nvram set vlan1ports=”4 5*”
nvram set vlan0hwname=”et0″
nvram set vlan2ports=”3 5″
nvram set vlan2hwname=”et0″
nvram set dmz_ifname=”vlan2″
nvram set lan_ifname=”br0″
nvram set lan_ifnames=”vlan0″
nvram set wan_ifname=”ppp0″

Now the door is open to extend the functionality of the openwrt router

# df
Filesystem 1k-blocks Used Available Use% Mounted on
/dev/root 7296 3420 3876 47% /
none 15276 36 15240 0% /tmp

Hrhrhrhr … :-) Disassemble photos can be found here

Welcome to minicom 2.1

OPTIONS: History Buffer, F-key Macros, Search History Buffer, I18n
Compiled on Mar 29 2005, 09:39:09.

Press CTRL-A Z for help on special keys

BusyBox v1.00 (2005.07.08-18:02+0000) Built-in shell (ash)
Enter ‘help’ for a list of built-in commands.

_______ ________ __
| |.—–.—–.—–.| | | |.—-.| |_
| – || _ | -__| || | | || _|| _|
|_______|| __|_____|__|__||________||__| |____|
|__| W I R E L E S S F R E E D O M
WHITE RUSSIAN (RC1) ——————————-
* 2 oz Vodka Mix the Vodka and Kahlua together
* 1 oz Kahlua over ice, then float the cream or
* 1/2oz cream milk on the top.
—————————————————
root@gollum:/# AT S7=45 S0=0 L1 V1 X4 &c1 E1 Q0
/bin/ash: c1: not found
root@gollum:/# /bin/ash: AT: not found

[1] + Done(127) AT S7=45 S0=0 L1 V1 X4
root@gollum:/#
root@gollum:/#
root@gollum:/# reboot The system is going down NOW !!
watchquag Sending SIGTERM to all processes.
Sending SIGKILL to all processes.
Please stand by while rebooting the system.
Restarting system.
Please stand by while rebooting the system…