Customizing Asus AM200g - IV. jabberd configuration

28.6.2008 01:24 | Přečteno: 2883× | Linux | poslední úprava: 3.7.2008 01:48

The following is a sequence of trial and errors, one by one, covering the path from the default config file to a working one. It is intended to be a search engine trap for people trying to resolve configuration problems.

$ telnet 192.168.1.1
Trying 192.168.1.1...
Connected to r (192.168.1.1).
Escape character is '^]'.
BCM96348 ADSL Router
Login: admin
Password:
> sh


BusyBox v1.00 (2005.04.12-18:11+0000) Built-in shell (msh)
Enter 'help' for a list of built-in commands.

# /var/usb/usb_1/bin/jabberd
Not writing pidfile /var/usb/usb_1/var/run/jabberd/jabber.pid: Read-only file system

In my setup, the jabberd ecosystem resides on a readonly filesystem, so the very first thing to do is to copy the etc/jabber.xml file to the vfat partition and make sure the files that need to be dynamically created/modified are there as well.

# mkdir /var/usb/usb_2/jabberd
# cp /var/usb/usb_1/etc/jabber.xml /var/usb/usb_2/jabberd
# /var/usb/usb_1/bin/vim /var/usb/usb_2/jabberd/jabber.xml

If you're not familiar with vi, here's quick help:
To quit without saving type ':q' (colon q Enter)
To save changes and quit type ':wq' (colon w q Enter)
To move around use the arrow keys
To start writing at cursor press 'i'
To get out of the writing mode (so that you can move somewhere else) press 'Esc'
To delete character at cursor press 'x'

The changes I did at first were:

1.

To prevent the message

Not writing pidfile /var/usb/usb_1/var/run/jabberd/jabber.pid: Read-only file system

I changed /var/usb/usb_1/var/run/jabberd/jabber.pid to /var/usb/usb_2/jabberd/jabber.pid.

2.

Next I launched jabberd in debug mode (-D) and pointed it to the alternate config file (-c path/to/file):

# /var/usb/usb_1/bin/jabberd -D -c /var/usb/usb_2/jabberd/jabber.xml
Mon Jan  3 20:31:13 2000  mio_tls.cc:921 MIO TLS init (GNU TLS)
Mon Jan  3 20:31:14 2000  log.cc:221 <log xmlns='jabber:server' type='warn' from='-internal'>
Cannot open /var/usb/usb_1/etc/dhparams.pem for reading dhparams: No such file or directory</log>
...

The comments in the file say:

    <!-- With the <dhparams/> element right inside the <tls/> element,  -->
    <!-- you can configure a file containing parameters for Diffie      -->
    <!-- Hellmann key exchanges. If this configuration setting is not   -->
    <!-- present, jabberd14 will generated these parameters             -->
    <!-- automatically on each startup. This takes some time, therefore -->
    <!-- you get a faster startup, if this setting is present.          -->

So I commented out <dhparams type='pem'>/var/usb/usb_1/etc/dhparams.pem</dhparams> as I don't know how to make it properly and don't mind waiting a few seconds more at startup. To start a comment, you write "<!--", you close it with "-->".

3.

# /var/usb/usb_1/bin/jabberd -D -c /var/usb/usb_2/jabberd/jabber.xml
...
Mon Jan  3 20:47:02 2000  xdb_sql.cc:911 using the following query on SQL connection establishment: SET NAMES utf8
Mon Jan  3 20:47:02 2000  log.cc:221 <log xmlns='jabber:server' type='alert' from='xdbsql.localhost'>Your xdb_sql is compiled without support 
for the selected database driver 'mysql'.</log>
Mon Jan  3 20:47:02 2000  xdb_sql.cc:813 processing handler definition: <handler xmlns='jabber:config:xdb_sql' ns='jabber:iq:last'>
...
Mon Jan  3 20:47:03 2000  deliver.cc:837 delivering to instance 'elogger.localhost'
Mon Jan  3 20:47:03 2000  deliver.cc:614 DELIVER 3:xdbsql.localhost <log xmlns='jabber:server' type='alert' from='xdbsql.localhost'>Your 
xdb_sql is compiled without support for the selected database driver 'mysql'.</log>

Yes, this is true, the daemon was compiled without any sql support. I've followed the steps in README.filespool to setup jabber to store data in files - I definitely don't want to run sql server on the machine. Of course I replaced the <xdb_file>$PREFIX/lib/libjabberdxdbfile.so</xdb_file> with <xdb_file>/var/usb/usb_1/lib/libjabberdxdbfile.so</xdb_file>, and <spool><jabberd:cmdline flag='s'>$PREFIX/var/spool/jabberd</jabberd:cmdline></spool> with <spool><jabberd:cmdline flag='s'>/var/usb/usb_2/jabberd/jabberdspool</jabberd:cmdline></spool> - then made sure the directory exists:

# mkdir /var/usb/usb_2/jabberd/jabberdspool

4.

# /var/usb/usb_1/bin/jabberd -D -c /var/usb/usb_2/jabberd/jabber.xml
...
Mon Jan  3 21:17:58 2000  log.cc:221 <log xmlns='jabber:server' type='alert' from='inject.localhost'>
could not open directory /var/usb/usb_1/var/spool/jabberd/inject.localhost for reading</log>
...

inject.localhost is a directory, where some other process can put messages. jabberd then automatically sends them. To make it working I changed <in>/var/usb/usb_1/var/spool/jabberd/inject.localhost</in> to <in>/var/usb/usb_2/jabberd/inject.localhost</in> and created the directory with

# mkdir /var/usb/usb_2/jabberd/inject

5.

# /var/usb/usb_1/bin/jabberd -D -c /var/usb/usb_2/jabberd/jabber.xml
...
Mon Jan  3 21:33:15 2000  jabberd.cc:336 main load check of 1.00 with 4 total threads
Mon Jan  3 21:33:16 2000  users.cc:209 0        total users
Mon Jan  3 21:33:17 2000  dialback.cc:1207 dialback idle check

hmm, seems to be working ..., time to launch kopete and try registering a user hajma@192.168.1.1. It failed, of course. The message I got from Kopete was definitely not helpful: "There was an error in the protocol stream: There was a conflict in the information received." and "Unable to create account on the server. The Jabber ID is probably already in use.". What a nonsense ... a brief look into the konsole shows the infamous "bouncing a routed packet" message:

Mon Jan  3 21:35:40 2000  deliver.cc:614 DELIVER 4:192.168.1.1 <route xmlns='jabber:server' type='auth' 
to='hajma@192.168.1.1' from='14@c2s/100E0278'><iq type='set' to='192.168.1.1' id='aab0a'>
<query xmlns='jabber:iq:register'>
<username>hajma</username>
<password>qwertyuiop</password>
</query>
</iq></route>
Mon Jan  3 21:35:40 2000  deliver.cc:837 delivering to instance 'dnsrv.localhost'
Mon Jan  3 21:35:40 2000  deliver.cc:766 delivery failed (Internal Delivery Error)
Mon Jan  3 21:35:40 2000  log.cc:221 <log xmlns='jabber:server' type='notice' from='192.168.1.1'>bouncing a routed 
packet to hajma@192.168.1.1 from 14@c2s/100E0278: Internal Delivery Error</log>

In short, to make jabberd working correctly, you have to replace all occurences of 'localhost' by the domain or IP jabberd is listening at. Now I replaced localhost with 192.168.1.1.

6.

# /var/usb/usb_1/bin/jabberd -D -c /var/usb/usb_2/jabberd/jabber.xml
...

Registering with Kopete again ... This time I only got one error: "Unable to create account on the server. The Jabber ID is probably already in use.". And again it was completely unrelated - in the konsole I found this:

Mon Jan  3 21:50:02 2000  mod_register.cc:278 we got a reply for: username
Mon Jan  3 21:50:02 2000  mod_register.cc:278 we got a reply for: password
Mon Jan  3 21:50:03 2000  mod_register.cc:298 returned err msg: Missing data field: name
...
<error code='400' type='modify'><bad-request xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'/>
<text xmlns='urn:ietf:params:xml:ns:xmpp-stanzas'>Missing data field: name</text></error></iq></route>

The stupid thing Kopete completely ignores XEP-0077, does not ask the server what is needed for registration and just sends username and password. To support Kopete, I had to delete <name/> and <email/> from the <register xmlns="jabber:iq:register" notify="yes"> section.
After this change I am able to register a new user and send messages. Just to be perfect I also changed /var/usb/usb_1/var/log/jabberd/error.log to /var/usb/usb_2/jabberd/error.log. Off to the next level!

7.

To have it available from outside world, I replaced 192.168.1.1 with my_domain.cz. To open a port in the AM-200g router, issue the following command:

iptables -I INPUT -p tcp -i ppp_8_48_1 --dport 5222 -m state --state NEW -j ACCEPT

8.

The main reason for running own jabber server is more privacy and that is impossible without encryption - let's do it. To be able to use TLS I had to generate a self-signed certificate. I've used the procedure described at http://www.vanemery.com/Linux/Jabber/jabberd.html:

$ openssl req -new -x509 -newkey rsa:1024 -days 3650 -keyout privkey.pem -out key.pem
Generating a 1024 bit RSA private key
...........++++++
.........++++++
writing new private key to 'privkey.pem'
Enter PEM pass phrase:
Verifying - Enter PEM pass phrase:
-----
You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [GB]:CZ
State or Province Name (full name) [Berkshire]:Čechy
Locality Name (eg, city) [Newbury]:Říčany
Organization Name (eg, company) [My Company Ltd]:hajma
Organizational Unit Name (eg, section) []:
Common Name (eg, your name or your server's hostname) []:my_domain.cz
Email Address []:admin@my_domain.cz

$ /usr/bin/openssl rsa -in privkey.pem -out my-certificate.pem
Enter pass phrase for privkey.pem:
writing RSA key
$ cat privkey.pem >> my-certificate.pem
$ rm privkey.pem
$ mv my-certificate.pem /var/usb/usb_1/etc/my-certificate.pem

and changed /var/usb/usb_1/etc/your-certificate.pem to /var/usb/usb_1/etc/my-certificate.pem in the config file.

9.

Then I uncommented the credentials section of tls.

Then I tried registering with Kopete again, this time I ticked the 'Use protocol encryption (SSL)' checkbox. I left the port as 5222. Did it fail? Of course - "There was a Transport Layer Security (TLS) error: Failed to establish a secure connection." In contrast to e.g. Pidgin, Kopete lacks support for StartTLS. Something from the konsole for the record:

Mon Jan  3 23:06:11 2000  mio.cc:783 IN (136 of max 1000, fd#13): ��
Mon Jan  3 23:06:11 2000  mio.cc:803 read on socket 13: ��
Mon Jan  3 23:06:11 2000  mio_xml.cc:363 [mio_xml.cc:363] XML Parsing Error: not well-formed (invalid token)

10.

While pidgin can be configured to work now just by ticking the 'Force SSL/TLS' checkbox, to support Kopete I had to make jabberd run SSL on a separate port. To do so I uncommented the <tls port=... section and put there my_domain.cz instead of IP address. Of course this port has to be open as well:

iptables -I INPUT -p tcp -i ppp_8_48_1 --dport 5223 -m state --state NEW -j ACCEPT

11.

Using a year old software with a good potential for security bugs is no fun, so I uncommented the <no_os_version/> line to at least make it more difficult for script kiddies.

12.

Finally let's open also a port for server to server communication, so that also users from other servers can reach me:

iptables -I INPUT -p tcp -i ppp_8_48_1 --dport 5269 -m state --state NEW -j ACCEPT

And that's it for today ... Next time I'll show you how to modify the Asus firmware so that jabberd is launched at boot (I hope. I'm half way through and all looks optimistic.). Here's the complete jabber.xml:

# cat /var/usb/usb_2/jabberd/jabber.xml
<?xml version="1.0"?>
<jabber xmlns:jabberd="http://jabberd.org/ns/configfile/replace" xmlns="http://jabberd.org/ns/configfile" xmlns:acl="http://jabberd.org/ns/acl">


  <service id="sessions.my_domain.cz">

    <host><jabberd:cmdline flag="h">my_domain.cz</jabberd:cmdline></host>

    <jsm xmlns="jabber:config:jsm">

      <vCard xmlns="vcard-temp" xml:lang="en">
        <FN>jabberd14 server</FN>
        <DESC>A Jabber Server using jabberd14!</DESC>
        <URL>http://jabberd.org/</URL>
      </vCard>

      <vCard xmlns="vcard-temp" xml:lang="de">
        <FN>jabberd14-Server</FN>
        <DESC>Ein Jabber-Server, der jabberd14 benutzt.</DESC>
        <URL>http://jabberd.org/</URL>
      </vCard>

      <register xmlns="jabber:iq:register" notify="yes">
        <instructions>Choose a username and password to register with this server.</instructions>
        <username/>
      </register>

      <regtimeout timeout="15768000"/>

      <welcome xmlns="jabber:server" xml:lang="en">
        <subject>Welcome!</subject>
        <body>Welcome to the Jabber server at localhost -- we hope you enjoy this service!</body>
      </welcome>

      <welcome xmlns="jabber:server" xml:lang="de">
        <subject>Herzlich Willkommen!</subject>
        <body>Willkommen auf dem Jabberserver auf localhost -- wir hoffen Sie mögen diesen Dienst!</body>
      </welcome>

      <admin>
        <reply xml:lang='en' xmlns='jabber:server'>
          <subject>Auto Reply</subject>
          <body>This is a special administrative address. Your message was received and forwarded to server administrators.</body>
        </reply>

        <reply xml:lang='de' xmlns='jabber:server'>
          <subject>Automatische Antwort</subject>
          <body>Dies ist eine spezielle Administrationsadresse. Ihre Nachricht wurde empfangen und an die Server-Administratoren weitergeleitet.</body>
        </reply>
      </admin>

      <vcard2jud/>

      <browse xmlns="jabber:iq:browse">

        <item category="directory" type="user" jid="users.jabber.org" name="Jabber User Directory">
          <ns>jabber:iq:search</ns>
          <ns>jabber:iq:register</ns>
        </item>

        <item category="component" type="s2s" jid="s2s.my_domain.cz" name="connections to other servers" acl:if="s2s"/>

      </browse>

      <mod_version>
        <no_os_version/>
      </mod_version>

      <presence>
        <presence2xdb/>
      </presence>

      <mod_useridpolicy>
        <!-- usernames that are not available for registration          -->
        <forbidden>admin</forbidden>
        <forbidden>administrator</forbidden>
        <forbidden>chatmaster</forbidden>
        <forbidden>hostmaster</forbidden>
        <forbidden>jabbermaster</forbidden>
        <forbidden>postmaster</forbidden>
        <forbidden>root</forbidden>
        <forbidden>support</forbidden>
        <forbidden>system</forbidden>
        <forbidden>webmaster</forbidden>
        <forbidden>xmpp</forbidden>
        <!-- minimum and maximum length of usernames                    -->
        <minlen>3</minlen>
        <maxlen>16</maxlen>
      </mod_useridpolicy>
    </jsm>

    <load main="jsm">
      <jsm>/var/usb/usb_1/lib/libjabberdsm.so</jsm>
      <mod_privacy>/var/usb/usb_1/lib/libjabberdsm.so</mod_privacy>
      <mod_stat>/var/usb/usb_1/lib/libjabberdsm.so</mod_stat>
      <mod_echo>/var/usb/usb_1/lib/libjabberdsm.so</mod_echo>
      <mod_roster>/var/usb/usb_1/lib/libjabberdsm.so</mod_roster>
      <mod_time>/var/usb/usb_1/lib/libjabberdsm.so</mod_time>
      <mod_vcard>/var/usb/usb_1/lib/libjabberdsm.so</mod_vcard>
      <mod_last>/var/usb/usb_1/lib/libjabberdsm.so</mod_last>
      <mod_version>/var/usb/usb_1/lib/libjabberdsm.so</mod_version>
      <mod_announce>/var/usb/usb_1/lib/libjabberdsm.so</mod_announce>
      <mod_browse>/var/usb/usb_1/lib/libjabberdsm.so</mod_browse>
      <mod_disco>/var/usb/usb_1/lib/libjabberdsm.so</mod_disco>
      <mod_admin>/var/usb/usb_1/lib/libjabberdsm.so</mod_admin>
      <mod_offline>/var/usb/usb_1/lib/libjabberdsm.so</mod_offline>
      <mod_ping>/var/usb/usb_1/lib/libjabberdsm.so</mod_ping>
      <mod_presence>/var/usb/usb_1/lib/libjabberdsm.so</mod_presence>
      <mod_useridpolicy>/var/usb/usb_1/lib/libjabberdsm.so</mod_useridpolicy>
      <mod_auth_digest>/var/usb/usb_1/lib/libjabberdsm.so</mod_auth_digest>
      <mod_auth_plain>/var/usb/usb_1/lib/libjabberdsm.so</mod_auth_plain>
      <mod_log>/var/usb/usb_1/lib/libjabberdsm.so</mod_log>
      <mod_register>/var/usb/usb_1/lib/libjabberdsm.so</mod_register>
      <mod_xml>/var/usb/usb_1/lib/libjabberdsm.so</mod_xml>
    </load>
  </service>

  <xdb id="xdb">

    <host/>

    <ns/>

    <load>
      <xdb_file>/var/usb/usb_1/lib/libjabberdxdbfile.so</xdb_file>
    </load>
    <xdb_file xmlns="jabber:config:xdb_file">
      <spool><jabberd:cmdline flag='s'>/var/usb/usb_2/jabberd/jabberdspool</jabberd:cmdline></spool>
      <timeout>600</timeout>
      <sizelimit>5000000</sizelimit>
    </xdb_file>
  </xdb>

  <service id="c2s">
    <load>
      <pthsock_client>/var/usb/usb_1/lib/libjabberdpthsock.so</pthsock_client>
    </load>
    <pthcsock xmlns="jabber:config:pth-csock">
      <authtime>120</authtime>
      <heartbeat>60</heartbeat>
      <karma>
        <init>10</init>
        <max>10</max>
        <inc>1</inc>
        <dec>1</dec>
        <penalty>-6</penalty>
        <restore>10</restore>
      </karma>

      <ip port="5222"/>

      <tls port='5223'>my_domain.cz</tls>
    </pthcsock>
  </service>

  <log id="elogger.my_domain.cz">
    <host/>
    <logtype/>
    <format>[%t] (%h): %s</format>
    <syslog>local0</syslog>
  </log>

  <service id="dnsrv.my_domain.cz">
    <host/>
    <load>
      <dnsrv>/var/usb/usb_1/lib/libjabberddnsrv.so</dnsrv>
    </load>
    <dnsrv xmlns="jabber:config:dnsrv">
      <resend service="_xmpp-server._tcp">s2s.my_domain.cz</resend>
      <resend service="_jabber._tcp">s2s.my_domain.cz</resend>
      <resend>s2s.my_domain.cz</resend>
    </dnsrv>
  </service>

  <service id="s2s.my_domain.cz">
    <load>
      <dialback>/var/usb/usb_1/lib/libjabberddialback.so</dialback>
    </load>
    <dialback xmlns="jabber:config:dialback">
      <ip port="5269"/>
      <karma>
        <init>50</init>
        <max>50</max>
        <inc>4</inc>
        <dec>1</dec>
        <penalty>-5</penalty>
        <restore>50</restore>
      </karma>
    </dialback>
  </service>

  <service id="inject.my_domain.cz">
    <dir>
      <in>/var/usb/usb_2/jabberd/inject</in>
    </dir>
  </service>

  <service id="update.jabber.org">
    <null/>
  </service>

  <io>
    <tls>
      <credentials>
          <default/>
          <domain>my_domain.cz</domain>
          <domain>transport.my_domain.cz</domain>
          <pem>/var/usb/usb_1/etc/my-certificate.pem</pem>
          <ca type='pem'>/var/usb/usb_1/etc/cacerts.pem</ca>
          <compression>LZO DEFLATE NULL</compression>
      </credentials>
      <cacertfile>/var/usb/usb_1/etc/cacerts.pem</cacertfile>
    </tls>

  </io>

  <global>
    <locales>
      <locale lang="de" locale="de_DE.UTF-8"/>
      <locale lang="fr" locale="fr_FR.UTF-8"/>
      <locale lang="hu" locale="hu_HU.UTF-8"/>
      <locale lang="it" locale="it_IT.UTF-8"/>
      <locale lang="nl" locale="nl_NL.UTF-8"/>
    </locales>
  </global>

  <pidfile>/var/usb/usb_2/jabberd/jabber.pid</pidfile>
</jabber>
#

Customizing Asus AM200g - V. firmware modification
Customizing Asus AM200g - III. jabberd and vim
Customizing Asus AM200g - II. Preparing the environment
Customizing Asus AM200g - I. PREPARATION
       

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