#!/usr/bin/env python # # Copyright 2008, 2009 (C) Jose Vasconcellos <jvasco@verizon.net> # # A script that can communicate with jungo-based routers # (such as MI424-WR, USR8200 and WRV54G) to backup the installed # firmware and replace the boot loader. # # Tested with Python 2.5 on Linux and Windows # """Usage: %s [options] <IP_address> [image.bin | url] Valid options: \t-h | --help: usage statement \t-d | --dump: create a flash dump \t-f | --file: use <filename> to store dump contents \t-u | --user: provide username (default admin) \t-p | --pass: provide password (default password1) \t --port: set port for http (default 8080) \t-q | --quiet: don't display unnecessary information \t-r | --reboot: reboot target on successful transfer \t-V | --version: display version information If no image (or url) is given, a flash dump is created. A built-in http server is used when an image file is provided. """ import os import sys import getopt import getpass import telnetlib import string import binascii import socket import thread import SocketServer import SimpleHTTPServer reboot = 0 HOST = "192.168.1.1" PORT = 8080 user = "admin" #password = getpass.getpass() password = "password1" proto = "http" url = "" imagefile = "" dumpfile = "" verbose = 1 do_dump = 0 dumplen = 0x10000 flashsize=4*1024*1024 #device="br0" device="ixp0" #################### def start_server(server): httpd = SocketServer.TCPServer((server,PORT),SimpleHTTPServer.SimpleHTTPRequestHandler) thread.start_new_thread(httpd.serve_forever,()) #################### def get_flash_size(): # make sure we don't have an A0 stepping tn.write("cat /proc/cpuinfo\n") buf = tn.read_until("Returned 0", 3) if not buf: print "Unable to obtain CPU information; make sure to not use A0 stepping!" elif buf.find('rev 0') > 0: print "Warning: IXP42x stepping A0 detected!" if imagefile or url: print "Error: No linux support for A0 stepping!" sys.exit(2) # now get flash size tn.write("cat /proc/mtd\n") buf = tn.read_until("Returned 0", 3) if buf: i = buf.find('mtd0:') if i > 0: return int(buf[i+6:].split()[0],16) # use different command tn.write("flash_layout\n") buf = tn.read_until("Returned 0", 3) i = buf.rfind('Range ') if i > 0: return int(buf[i+17:].split()[0],16) print "Can't determine flash size!" else: print "Unable to obtain flash size!" sys.exit(2) def image_dump(tn, dumpfile): if not dumpfile: tn.write("ver\n"); buf = tn.read_until("Returned 0",2) i = buf.find("Platform:") if i < 0: platform="jungo" else: line=buf[i+9:] i=line.find('\n') platform=line[:i].split()[-1] tn.write("rg_conf_print /dev/%s/mac\n" % device); buf = tn.read_until("Returned 0",3) i = buf.find("mac(") if i > 0: i += 4 else: print "No MAC address found! (use -f option)" sys.exit(1) dumpfile = "%s-%s.bin" % (platform, buf[i:i+17].replace(':','')) else: tn.write("\n") print "Dumping flash contents (%dMB) to %s" % (flashsize/1048576, dumpfile) f = open(dumpfile, "wb") t=flashsize/dumplen for addr in range(t): if verbose: sys.stdout.write('\r%d%%'%(100*addr/t)) sys.stdout.flush() tn.write("flash_dump -r 0x%x -l %d -4\n" % (addr*dumplen, dumplen)) tn.read_until("\n") count = addr*dumplen while 1: buf = tn.read_until("\n") if buf.strip() == "Returned 0": break s = buf.split() if s and s[0][-1] == ':': a=int(s[0][:-1],16) if a != count: print "Format error: %x != %x"%(a,count) sys.exit(2) count += 16 f.write(binascii.a2b_hex(string.join(s[1:],''))) tn.read_until(">",1) f.close() if verbose: print "" def telnet_option(sock,cmd,option): #print "Option: %d %d" % (ord(cmd), ord(option)) if cmd == telnetlib.DO: c=telnetlib.WILL elif cmd == telnetlib.WILL: c=telnetlib.DO sock.sendall(telnetlib.IAC + c + option) def telnet_timeout(): print "Fatal error: telnet timeout!" sys.exit(1) def usage(): print __doc__ % os.path.basename(sys.argv[0]) #################### try: opts, args = getopt.getopt(sys.argv[1:], "hdf:qp:P:rvV", \ ["help", "dump", "file=", "user=", "pass=", "port=", "quiet=", "reboot", "verbose", "version"]) except getopt.GetoptError: # print help information and exit: usage() sys.exit(1) for o, a in opts: if o in ("-h", "--help"): usage() sys.exit(1) elif o in ("-V", "--version"): print "%s: 0.11" % sys.argv[0] sys.exit(1) elif o in ("-d", "--no-dump"): do_dump = 1 elif o in ("-f", "--file"): dumpfile = a elif o in ("-u", "--user"): user = a elif o in ("-p", "--pass"): password = a elif o == "--port": PORT = int(a) elif o in ("-q", "--quiet"): verbose = 0 elif o in ("-r", "--reboot"): reboot = 1 elif o in ("-v", "--verbose"): verbose = 1 # make sure we have enough arguments if len(args) > 0: HOST = args[0] if len(args) == 2: if args[1].split(':')[0] in ("tftp", "http", "ftp"): url = args[1] else: imagefile = args[1] else: do_dump = 1; #################### # create a telnet session to the router try: tn = telnetlib.Telnet(HOST) except socket.error, msg: print "Unable to establish telnet session to %s: %s" % (HOST, msg) sys.exit(1) tn.set_option_negotiation_callback(telnet_option) buf = tn.read_until("Username: ", 3) if not buf: telnet_timeout() tn.write(user+"\n") if password: buf = tn.read_until("Password: ", 3) if not buf: telnet_timeout() tn.write(password+"\n") # wait for prompt buf = tn.read_until("> ", 3) if not buf: telnet_timeout() flashsize = get_flash_size() if do_dump: image_dump(tn, dumpfile) if imagefile or url: splitpath = os.path.split(imagefile) # create load command if url: cmd = "load -u %s -r 0\n" % (url) else: server = tn.get_socket().getsockname()[0] cmd = "load -u http://%s:%d/%s -r 0\n" % (server, PORT, splitpath[1]) if not os.access(imagefile, os.R_OK): print "File access error: %s" % (imagefile) sys.exit(3) # make sure we're in the directory where the image is located if splitpath[0]: os.chdir(splitpath[0]) start_server(server) if verbose: print "Unlocking flash..." tn.write("unlock 0 0x%x\n" % flashsize) buf = tn.read_until("Returned 0",5) if verbose: print "Writing new image..." print cmd, tn.write(cmd) buf = tn.read_until("Returned 0",10) # wait till the transfer completed buf = tn.read_until("Download completed successfully",20) if buf: print "Flash update complete!" if reboot: tn.write("reboot\n") print "Rebooting..." tn.write("exit\n") tn.close()