Passwortfreie-Infoseite: Unterschied zwischen den Versionen

Version vom 6. Januar 2006, 10:03 Uhr

Warum

Immerwieder hat man das Problem,das scheinbar ein Router falsch eingestellt ist,aber keine Kontaktmoeglichkeit zum Besitzer existiert. Um die Einstellungen auch ohne das Passwort zu kennen mal zu ueberpruefen wird eine neue Seite auf dem Webserver angelegt

Wie

auf dem Router wird eine Seite "/www/cgi-bin-info.html" angelegt.
in "/etc/init.d/S56saveklog" wird mit "dmesg >/tmp/dmesg.txt" der Kernellog direkt nach dem Routertstart gerettet
wegen
- der besseren Uebersichtlichkeit
- der einfacheren maschinellen Verarbeitung (Automatische Nodekarte!) und
- der Kuerze
wird alles als reintext erzeugt (fast ohne HTML-Codes).

Lösung Programm

Hier schonmal ein alpha-release 8-) Einfach ausschneiden & auf den Router kopieren...(naja,fast...)

#!/bin/sh
#
# version.......: infopage_05-jan-2005 
# author........: bastian bittorf  
# contact.......: infopage.20.bastian@spamgourmet.org
# licence.......: GPL
# requirements..: 600kb runtime-memory
# tested........: fff v1.0.7
#
# This script generates helpful infos about your fff-openwrt-router
# Its main purpose was to avoid loading hundreds of kilobytes from
# slow longrange wireless-links only to know some unmuch infos
# Output should be HTML,but human AND machine-readable.
# Total data-output should not be around 1000 bytes.
#
# Which programs are needed to un this?
# ash,wl,busybox (awk,cat,echo,grep,ipcalc,wget)
# 
# -----------------------------------------------------------------
#
#
# Introducing HTMLoutput for client-browser
# Sadly we have to use text/html rather than text/plain,because
# i want to use <b> for some bold-text = better humanreadable
#

echo "Content-type: text/html";echo

#
# Evaluation query-string
# For faster access the hole infopage will be silently generated 
# trough crond every 15mins. Only if you specify an url+"?l" 
# you get livedata, but you have to wait some seconds.  
#

if [ "$QUERY_STRING" = "l" ]; then echo "live daten...";fi

# 
# Evaluation query-string
# If the clientbrowsers query is not "l" get lifedata.
#

if [ "$QUERY_STRING" != "l" ]; then echo "generierte page...";fi

#
# WIFI-scan
# Starting wifiscan. We check out the results later 
# to give the wireless-device some time for the job.
#

wl scan

#
# IPs and netmasks in HTML-Title
# For better orientation with multiple tabs i prefer to
# read the wifi/lan-IPs and "short" netmasks in title.
#

echo "<HTML><TITLE>"$(
 nvram get wifi_ipaddr)/$(
  ipcalc -p $(nvram get wifi_netmask)|
   awk -F= '{print $2}'),$(
 nvram get lan_ipaddr)/$(
  ipcalc -p $(nvram get lan_netmask)|
   awk -F= '{print $2}')"</TITLE><BODY><PRE>"

#
# Calculating signal-noise-difference
# ash cant handle adding negative numbers,
# so i make them positve with "number*-1"
# does anyone know a simpler/faster/better way?
#

echo "<b>WLAN</b>"
echo "SIGNALRAUSCHABSTAND: "$(
 echo $(($((($(wl noise|awk '{print $3}'))*-1))-$(($(wl rssi|awk '{print $3}')*-1)))))

#
# SSID. 
# I never heard of associated routers with different SSID,
# so i think its enough to print the configured SSID.
#

echo "SSID: "$(nvram get wl0_ssid)

#
# Channel und transmit/output-power.
# In fact we know the beavior of routers which
# have different real and conifgured values.
# Here we can track this.
#

echo "KANAL/_real/mW/_real: "$(
 nvram get wl0_channel)/$(
 wl assoc|grep Channel|awk '{print $11}')/$(
 nvram get ff_txpwr)/$(
 wl txpwr|awk '{print $3}')
 
#
# Used Antenna / diversity
# Here we track the configured
# transmit and receive-antennas.
# To save time we take defaults ("2").
#

g=2
if [ "$(nvram get wl0_antdiv)" = "0" ];then g=L;fi
if [ "$(nvram get wl0_antdiv)" = "1" ];then g=R;fi
h=2
if [ "$(nvram get ff_txant)" = "0" ];then h=L;fi
if [ "$(nvram get ff_txant)" = "1" ];then h=R;fi
echo "Empf/SendANT: "$g/$h

#
# Use of B-mode or G-mode (801.11b/g 11/54mbit)
# We know the beavior of broadcom-adhoc-mode.
# After some time a big ad-hoc network falls into
# B-mode and normally never raises into G.
# Here we track configured and real mode.
#

h=BG
if [ "$(nvram get wl0_gmode)" = "0" ];then h=B;fi
if [ "$(nvram get wl0_gmode)" = "2" ];then h=G;fi
echo "MODE/_real: "$h/$(
 if [ "$(wl assoc|grep "Supported"|awk '{printf $15}')" = "54" ]
  then echo G
  else echo B
 fi)                                  

#
# Baserate.
# Nothing to say.
#

echo "BASERATE: "$(
 nvram get wl0_rateset)

#
# Transmit-rate.
# Here we can see the configured max-rate
# and the real,actual rate. i.e. 0/5.5

echo "RATE/_real: "$(
 nvram get wl0_rate)/$(
 wl rate|awk '{print $3}')
 
#
# CTS & Frameburst
# Configured values.
#
 
echo "CTS/BURST: "$(
 nvram get wl0_gmode_protection)/$(
 nvram get wl0_frameburst)

#
# FragmentationHold, RTS , MTU
# Configrued values.
#

echo "FRAG/RTS/MTU: "$(
 nvram get wl0_frag)/$(
 nvram get wl0_rts)/$(
 nvram get ff_mtu)

#
# WEP-crypto on/off
# We know the behavior of routers which
# have configured wep but running uncrypted,
# and the opposite. Here we track this.

echo "WEP/_real: "$(
 nvram get wl0_wep)/$(
 if [ "$(wl assoc|grep WEP|awk '{print $5}')" = "WEP" ]
  then echo on
  else echo off
 fi)

#
# Contact-infos
# Configured values. In our contact-page we
# included 2 fields for gpsdata. They can easy
# obtained through www.maporama.com
#

echo "<b>KONTAKT</b>"
echo "MAIL: "$(
 nvram get ff_adm_mail)
echo "FON: "$(
 nvram get ff_adm_tel)
echo "ORT/GPSX/Y: "$(
 nvram get ff_adm_loc)/$(
 nvram get gpsx)/$(
 nvram get gpsy)

#
# uptime
# Time since last reboot, calculated in hours.
#

echo "<b>SYSTEM</b>"
echo "UP: "$(
 cat /proc/uptime|awk '{printf "%1.1f",$1/3600}')h

#
# Free memory, free diskspace
# Something special. Here we add some offset-kilobytes
# to the actual value,to have the "real" amount
# when not running the script.
# The method to show diskspace is not optimal.
# Anyone knows a better way?
#

OFFSET=860
echo "FREEMEM/DISK: "$(
 cat /proc/meminfo|awk '{if($1=="Mem:"){print ($4/1024)+$OFFSET;exit}}')kb/$(
 df|awk '{if($1=="/dev/mtdblock/4"){print$4;exit}}')kb

#
# Version FFF,OLSRd, this infopage and excution time.
# Not that elegant,but the most reliable way i think.
# On another day i will make this in one loop.
#

echo "vFFF/OLSRd/THIS/TIME: "$(
 ipkg status|awk '{ 
  if(index($0,"webadmin")>1) a++
  if (a>0) {b++
   if (b==4) print $2
   break} }')/$(
 ipkg status|awk '{ 
  if(index($0,"olsrd")>1) a++
  if (a>0) {b++
   if (b==5) print $2
   break} }')/$(
 ipkg status|awk '{ 
  if(index($0,"infopage")>1) a++
  if (a>0) {b++
   if (b==5) print $2
   break} }')/$(
 date)

#
# CPU-infos.
# At router-startup runs an script in "/etc/init.d/S..saveklog"
# We need this to save the kernel-log, because later this log
# is filled with (for this skript) useless infos.
# CPU-load is given in percent. Its wrong but nicer 8-)
#

cat /tmp/dmesg.txt|awk '{
 if($1=="CPU")a=$4
 if($1=="CPU:"){printf $0;printf " / Rev. "a
 exit}}'
cat /proc/loadavg|awk '{
 printf " /";printf "%3.0f",$3*100}'
cat /proc/cpuinfo|awk '{
 if($1=="cpu")printf "%% / "$4"-"$5
 if($1=="BogoMIPS"){print " / "$3"bmips"
 exit}}'

#
# Board-values
# Nothing to say.
# Maybe later I write a routine to
# determine from CPU/board-values the 
# machine behind. ("WRT54g v1.0","Siemens SE505" etc.)
#

echo "BOARDrev/type/num/flags/2: "$(
 nvram get boardrev|awk '{printf $0"/"}'
 nvram get boardtype|awk '{printf $0"/"}'
 nvram get boardnum|awk '{printf $0"/"}' 
 nvram get boardflags|awk '{printf $0"/"}' 
 nvram get boardflags2|awk '{printf $0}')

#
# OLSR-uptime
# Maybe interesting to know.
# Hint: for all OLSR-infos should be
# the httpinfo-plugin enabled.
#

echo "<b>OLSR</b>"
echo "UP: "$(
 wget -O - http://127.0.0.1:8080|awk -F "i>" '{
  if($1=="Olsrd uptime: <"){
   print substr($2,1,length($2)-8)
   exit}}')

#
# OLSR-Timing
# Does this often misunderstood expression work?
#

cat /etc/olsrd.conf|awk '{
 if($1=="LinkQualityWinSize")a=$2
 if($1=="HelloInterval")b=$2
 if($1=="HelloValidityTime"){
  c=$2;d="!="
  if (c-(a*b)==0)d="="
  print "HEIn*WSize=HEVal?:",b" x "a,d,c
  exit} }'

#
# Filter, OLSR-dhcp, HNA4, LQ
# Configured values.
# Maybe we should better parse olsrd.conf?
#

echo "FILTER: "$(
 nvram get ff_ign)
echo "DHCP: "$(
 nvram get ff_wldhcp)
echo "HNA4: "$(
 nvram get ff_hna4)
echo "LQ: "$(
 nvram get ff_lqmult)

#
# OLSRd-PlugIns
# All configured plugins from olsrd.conf
# Version information included.
#

echo "PLUGIN: "$(
 cat /etc/olsrd.conf|awk '{
  if($1=="LoadPlugin") printf $2"/" }')

#
# DNS-server
# Search-order for name-servers. Normally the router
# itself (127.0.0.1) and then the dnsmasq-entry
#

echo "<b>CLIENTS</b>"
cat /etc/resolv.conf|awk '{
 if($1=="nameserver")printf "DNSSERVER: "$2"/"}'
cat /etc/dnsmasq.conf|awk -F "=" '{
 if(index($0,"server=")>0){
  print $2
  exit}}'

#
# DHCP-clients
# All dhcp-leases. Maybe we should for
# private reasons delete the mac-addresses.
#

cat /var/run/dhcp.leases|awk '{
 print $2,$3,$4}'

#
# INET-gateways
# All 0.0.0.0/0-HNA4-Announced inet-gateways.
# Later I want to include tracerout-outputs to every IP
# and the affiliated and summarized ETX-values
# traceroute 10.11.12.3 -w 3 -n 2>/dev/null | awk '{if($2=="*"){print "error";exit} else printf $2" -> " }') 
#

echo "<b>INETGATES</b>"
wget -O - http://127.0.0.1:8080/nodes|awk -F "<" '{
 if(substr($0,1,40)=="<tr><td>0.0.0.0</td><td>0.0.0.0</td><td>")
 print substr($7,4)}'

#
# Neighborhood
# All direct neighbors, sorted. 
# Best ETX-values are bottom.
# ETX > 99 will be "translated" to 99.
# This means "senseless".
# Maybe i should also filter ETX 0.00
# Maybe i should make hyperlinks for faster
# exploring some nodes. (more output!)
#

echo "<b>ETX/NACHBARN</b>"
wget -O - http://127.0.0.1:8080/nodes|awk '{
 if($0=="</table>")exit
 a++
 if(a>21){
  split($0,b,"</td><td>")
  c=substr(b[8],1,4)
  if(c>99)c="99.99"
  printf "%5.2f ",c
  print "- "b[2]}}'|
 sort

#
# Wifi-scan
# The now hopefully ready wifi-scan (see on top) 
# will be formatted. Its only purpose is the have
# an overview of channel-density. Therefore no
# crypto-infos etc. 
# Sorted by signal-noise-difference.
# 

echo "<b>SIGNALRAUSCHABSTAND/SSID/KANAL</b>"
wl scanresults|awk '{
 if($1=="SSID:")d=$2;a=index($0,"RSSI:")
 if(a>0){b=substr($0,a+6,3);c=substr($0,a+21,3);e=b-c;
 if(e<0)e=0;printf"%2.0f ",e;print d,substr($0,a+38)} }'|sort

#
# End! Because of saving output-filesize
# HTML-endtag is not needed 8-)
#
#

Lösung Browserausgabe

Die Ausgabe im Browser sieht dann so aus:

Geplante Funktionen

schon integriert aber noch nicht auf dem Bild: Netzmasken+IPadressen LAN/WIFI,freemem,freedisk-speicher
alle wege ins inet zeigen + ETX-Gesamtwerte dafuer aufsummieren
.ipk machen
Skript schneller machen,Ideen:
- ipkg-versionen in einem Durchlauf auslesen

Probleme

Probleme auf dem SE505,WAP54g etc. mit nur 8mb RAM
kurzzeitig hoher Speicherbedarf waehrend der Laufzeit (~600kb)
- Loesung?

Kontakt

Wer machts? Der hier: fries43 16:07, 2. Jan 2006 (CET)