RE: Getting Too Long Error

I have created PDU using  following API

 

 pdu = snmp_pdu_create(SNMP_MSG_GET);

 

Doesn't it populate  version by default ?

 

Regards,

Rucha

 

From: Pranesh Kulkarni [mailto:[email protected]] 
Sent: Friday, June 20, 2008 12:11 PM
To: Rucha
Cc: Dave Shield; [email protected]
Subject: Re: Getting Too Long Error

 

I think PDU is malformed as Dave said , ...

Check version , its stating that it  -1 and errstat and errindex as also -1
.




On Fri, Jun 20, 2008 at 11:41 AM, Rucha <[email protected]>
wrote:

Hi Dave,

Here is the dump of pdu.

(gdb) p pdu
$1 = (netsnmp_pdu *) 0x951b398
(gdb) p *$1
$2 = {version = -1, command = 160, reqid = 713309340, msgid = 1415423209,
transid = 0, sessid = 0, errstat = -1,
 errindex = -1, time = 0, flags = 0, securityModel = -1, securityLevel = 0,
msgParseModel = 0, transport_data = 0x0,
 transport_data_length = 0, tDomain = 0x0, tDomainLen = 0, variables = 0x0,
community = 0x0, community_len = 0,
 enterprise = 0x0, enterprise_length = 0, trap_type = 0, specific_type = 0,
agent_addr = "\000\000\000",
 contextEngineID = 0x0, contextEngineIDLen = 0, contextName = 0x0,
contextNameLen = 0, securityEngineID = 0x0,
 securityEngineIDLen = 0, securityName = 0x0, securityNameLen = 0, priority
= 0, range_subid = 0, securityStateRef = 0x0}

135              int length = sizeof(pdu);
(gdb) n
137              printf("PDU Length = %d\n", length);
(gdb) n
PDU Length = 4
139         status = snmp_synch_response(ss, pdu, &response);
(gdb) p length
$4 = 4

Regards,
Rucha


-----Original Message-----
From: [email protected] [mailto:[email protected]] On
Behalf Of Dave Shield
Sent: Thursday, June 19, 2008 8:18 PM
To: Rucha
Cc: Pranesh Kulkarni; [email protected]
Subject: Re: Getting Too Long Error

2008/6/19 Rucha <[email protected]>:
> I checked the size of pdu which I am sending, its size of just 4bytes.

An SNMP PDU of just 4 bytes!!?
Can you please post a packet dump of this request.


> Any other reason for getting this error ?

Given that a  GET PDU will typically be at *least* 30 bytes in size,
and the absolute minimum size of a completely empty GET
request is (I think) 18 bytes - if your GET request is just 4 bytes,
then it's almost certainly invalid.
  If it's malformed, then the parsing code might well be reading
the length as over-size, and returning a tooLong error.


Dave

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