Problem solved.
It took me some time to figure out that requests->requestvb->val.string is not
a string terminated by NULL. All the latest valid information is in the first
'requests->requestvb->val.len' characters.
Cheers!
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Lin, Zihui
Sent: 2005年7月29日 23:01
To: [email protected]
Subject: Question for Handling the WRONGVALUE error
Hello list,
I'm new to net-snmp. Following the mib2c man page, I generated a pair of
souce code, and modified them a little bit.
The management object is an OCTET STRING, and the idea is, I want to
verify
the string when people SETing the value. If a malformed IPadress was
set,
then a WRONGVALUE error should be returned.
The handler works well when the verification success, but if it failed
for
once, even I SET some good strings after that, it fails also. I have
tried
to put the verify code to RESERVE2, but the result is the same.
So now if my subagent detected a wrong value once, it fails for ever. :(
What's problem? What can I do in this situation?
Thanks in advance,
Zihui
Here is the implementation code:
int
handle_observedNetworks(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
DEBUGMSGTL(("observedNetworks",
"continuing request, mode = %d\n",
reqinfo->mode));
switch (reqinfo->mode) {
/** GET is simple here */
case MODE_GET:
snmp_set_var_typed_value(requests->requestvb, ASN_OCTET_STR,
(u_char *) observedNetworks_str,
strlen(observedNetworks_str));
break;
case MODE_SET_RESERVE1:
if ( requests->requestvb->type != ASN_OCTET_STR) {
netsnmp_set_request_error(
reqinfo,
requests,
SNMP_ERR_WRONGVALUE //some error
);
return;
}
break;
case MODE_SET_RESERVE2:
break;
case MODE_SET_FREE:
break;
case MODE_SET_ACTION:
if (!verify_ip_range(requests->requestvb->val.string) ){
netsnmp_set_request_error(reqinfo, requests,
SNMP_ERR_BADVALUE);
}
strncpy(observedNetworks_str, requests->requestvb->val.string,
256);
break;
case MODE_SET_COMMIT:
break;
case MODE_SET_UNDO:
break;
default:
snmp_log(LOG_ERR, "unknown mode (%d) in
handle_observedNetworks\n",
reqinfo->mode);
return SNMP_ERR_GENERR;
}
return SNMP_ERR_NOERROR;
}
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