[unisog] Getting the Arp table from a router, whit Java or C

stefano stefano.gargiulo at roma1.infn.it
Tue Apr 11 09:49:34 GMT 2006

Hi, sorry for my bad english, i know this and i'm working for make it 
better.. but here come the question: I've known this mailing list 
reading the previous thread talking about this argument (Getting ARP 
tables from Cisco switches via snmp -- slightly OT ) after a search on 

I've to develop an* identical* application (that insert in a DB the 
*MAC*, the* IP* and if is possible the Switch port number..) but i've a 
condiction, i've to develop this using a java server, not one linux 
commands or application  (not , but max portability, because some 
servers are Windows and some are Unix, therefore*_ i can't use smnpwalk 
or arptrace!!_* ) i must to realize this operation whit *JavaAPIs* or 
whit portable a source code as a *C code.*

I've downloaded the *Adventnet java SNMP API* package, and i can get a 
variable from the MIB for example the OID / return to 
me the string value /"Cisco Internetwork Operating System Software 
\r\nIOS (tm) RSP Software (RSP-JSV-M), Version 12.0(9), RELEASE SOFTWARE 
(fc1)\r\nCopyright (c) 1986-2000 by cisco Systems, Inc.\r\nCompiled Mon 
24-Jan-00 23:15 by bettyl"/ then i can deduce that the APIs work fine. 
But if i try to get a table, i recive a null pointer, and i don't know 
how i can do this operation correctly.

*anyone can help me?*

here there is the bad test code working only with a single MIB variable:

/public static void openSNMPSession() throws Exception
        SnmpAPI api = new SnmpAPI();
        SnmpSession session = new SnmpSession(api);
        SnmpPDU pdu = new SnmpPDU();
        pdu.addNull(new SnmpOID(".")); //doesn't work
        //pdu.addNull(newSnmpOID("//. /")); work
        SnmpPDU response_pdu = session.syncSend(pdu);
        if(response_pdu == null)
            System.out.println("The Request has timed out.");
            System.out.println("Errors: "+response_pdu.getError());
"+response_pdu.getCommunity()+"\n Ver "+response_pdu.getVariable(10));
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://www.dshield.org/pipermail/unisog/attachments/20060411/dfa2cd4c/attachment.htm

More information about the unisog mailing list