求助

[llakny]

请问大家红色部分应怎么填写？
我需要set的类型是ipAddress，是不是直接在requests->requestvb->val.XXX中 提取 信息？？
求高手指点。
int
handle_ipAddr(netsnmp_mib_handler *handler,
netsnmp_handler_registration *reginfo,
netsnmp_agent_request_info *reqinfo,
netsnmp_request_info *requests)
{
/*
* We are never called for a GETNEXT if it's registered as a
* "instance", as it's "magically" handled for us.
*/

/*
* a instance handler also only hands us one request at a time, so
* we don't need to loop over a list of requests; we'll only get one.
*/

switch (reqinfo->mode) {

case MODE_GET:
snmp_set_var_typed_value(requests->requestvb, ASN_IPADDRESS,
(u_char *)
/* XXX: a pointer to the scalar's data */
,
/*
* XXX: the length of the data in bytes
*/ );
break;

/*
* SET REQUEST
*
* multiple states in the transaction. See:
* http://www.net-snmp.org/tutorial ... ule/set-actions.jpg
*/
case MODE_SET_RESERVE1:
if ( /* XXX: check incoming data in requests->requestvb->val.XXX for failures, like an incorrect type or an illegal value or ... */ ) {
netsnmp_set_request_error(reqinfo, requests,
/* XXX: set error code depending on problem (like SNMP_ERR_WRONGTYPE or SNMP_ERR_WRONGVALUE or ... */
);
}
break;

case MODE_SET_RESERVE2:
/*
* XXX malloc "undo" storage buffer
*/
if ( /* XXX if malloc, or whatever, failed: */ ) {
netsnmp_set_request_error(reqinfo, requests,
SNMP_ERR_RESOURCEUNAVAILABLE);
}
break;

case MODE_SET_FREE:
/*
* XXX: free resources allocated in RESERVE1 and/or
* RESERVE2. Something failed somewhere, and the states
* below won't be called.
*/
break;

case MODE_SET_ACTION:
/*
* XXX: perform the value change here
*/
if ( /* XXX: error? */ ) {
netsnmp_set_request_error(reqinfo, requests, /* some error */
);
}
break;

case MODE_SET_COMMIT:
/*
* XXX: delete temporary storage
*/
if ( /* XXX: error? */ ) {
/*
* try _really_really_ hard to never get to this point
*/
netsnmp_set_request_error(reqinfo, requests,
SNMP_ERR_COMMITFAILED);
}
break;

case MODE_SET_UNDO:
/*
* XXX: UNDO and return to previous value for the object
*/
if ( /* XXX: error? */ ) {
/*
* try _really_really_ hard to never get to this point
*/
netsnmp_set_request_error(reqinfo, requests,
SNMP_ERR_UNDOFAILED);
}
break;

default:
/*
* we should never get here, so this is a really bad error
*/
snmp_log(LOG_ERR, "unknown mode (%d) in handle_ipAddr\n",
reqinfo->mode);
return SNMP_ERR_GENERR;
}

return SNMP_ERR_NOERROR;
}