Serial port to acces the shell?

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tijeff
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Joined: 21 Sep 2009
Posts: 7
PostPosted: Tue Jan 03, 2012 18:03    Post subject: Serial port to acces the shell? Reply with quote
I've add a serial port to my Linksys WRT54Gv8 router
DD-WRT v24-sp2 (10/10/09) micro - build 13064

Pinout :
VCC 1 o
TX 2 o
RX 3 o
N/C 4 o
GND 5 o
http://infodepot.wikia.com/wiki/Linksys_WRT54G_v8.0


I sucessfuly connected to it at 115200 N81 via voltage converter and hyperterminal.

I can see it boot:
Quote:

CFE version 1.0.37 for BCM947XX (32bit,SP,LE)
Build Date: Fri Nov 23 11:34:59 EST 2007 (tornado@dd-wrt.com)
Copyright (C) 2000,2001,2002,2003 Broadcom Corporation.

Initializing Arena
Initializing Devices.
Boot partition size = 262144(0x40000)
et0: Broadcom BCM47xx 10/100 Mbps Ethernet Controller 4.150.10.5
CPU type 0x29029: 240MHz
Total memory: 8192 KBytes

Total memory used by CFE: 0x80700000 - 0x807977D0 (620496)
Initialized Data: 0x8072E860 - 0x80730FB0 (10064)
BSS Area: 0x80730FB0 - 0x807317D0 (2080)
Local Heap: 0x807317D0 - 0x807957D0 (409600)
Stack Area: 0x807957D0 - 0x807977D0 (8192)
Text (code) segment: 0x80700000 - 0x8072E860 (190560)
Boot area (physical): 0x006BF000 - 0x006FF000
Relocation Factor: I:00000000 - D:00000000

Device eth0: hwaddr 00-1C-10-BC-32-A8, ipaddr 192.168.1.1, mask 255.255.255.0
gateway not set, nameserver not set
Loader:raw Filesys:tftp Dev:eth0 File:: Options:(null)
Loading: Failed.
Could not load :: Timeout occured
Loader:raw Filesys:raw Dev:flash0.os File: Options:(null)
Loading: .. 3856 bytes read
Entry at 0x80001000
Closing network.
Starting program at 0x80001000


But now, I seen many people control stuff with there router, but can we do the opposite?

Can I use this port to issue shell command to my router ? The same way I would in telnet?

I've shearch a bit on this and didn't found anything.

Is this even possible?
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gobbledigook
DD-WRT Guru


Joined: 06 Apr 2009
Posts: 727
PostPosted: Tue Jan 10, 2012 15:09    Post subject: Reply with quote
ctrl+c

to break the output and give you a prompt, you can send commands same as in busybox but i dunno about using the serial as an 'out'
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barryware
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Joined: 26 Jan 2008
Posts: 13049
Location: Behind The Reset Button
PostPosted: Wed Jan 11, 2012 13:54    Post subject: Reply with quote
ctrl+c will put you at the cfe prompt.. just hit the enter key a couple of times after it boots and you will be at the busybox prompt.

hit the tab key a couple of times and a list of available commands appears.
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