/*

 * Portions of this file are subject to the following copyright(s).  See

 * the Net-SNMP's COPYING file for more details and other copyrights

 * that may apply:

 *

 * Portions of this file are copyrighted by:

 * Copyright (c) 2016 VMware, Inc. All rights reserved.

 * Use is subject to license terms specified in the COPYING file

 * distributed with the Net-SNMP package.

 */

#include <net-snmp/net-snmp-config.h>

#include <net-snmp/net-snmp-includes.h>

#include <net-snmp/agent/net-snmp-agent-includes.h>

#include <net-snmp/agent/null.h>

#ifdef HAVE_STRING_H

#include <string.h>

#else

#include <strings.h>

#endif

int

netsnmp_register_null(oid * loc, size_t loc_len)

{

    return netsnmp_register_null_context(loc, loc_len, NULL);

}

int

netsnmp_register_null_context(oid * loc, size_t loc_len,

                              const char *contextName)

{

    netsnmp_handler_registration *reginfo;

    reginfo = SNMP_MALLOC_TYPEDEF(netsnmp_handler_registration);

    if (reginfo != NULL) {

        reginfo->handlerName = strdup("");

        reginfo->rootoid = loc;

        reginfo->rootoid_len = loc_len;

        reginfo->handler =

            netsnmp_create_handler("null", netsnmp_null_handler);

        if (contextName)

            reginfo->contextName = strdup(contextName);

        reginfo->modes = HANDLER_CAN_DEFAULT | HANDLER_CAN_GETBULK;

        if (!reginfo->handlerName || !reginfo->handler ||

            (contextName && !reginfo->contextName)) {

            snmp_log(LOG_ERR,"null context allocation failure(s)\n");

            netsnmp_handler_registration_free(reginfo);

            return MIB_REGISTRATION_FAILED;

        }

    } else {

        snmp_log(LOG_ERR,"null context allocation failure\n");

        return MIB_REGISTRATION_FAILED;

    }

    return netsnmp_register_handler(reginfo);

}

int

netsnmp_null_handler(netsnmp_mib_handler *handler,

                     netsnmp_handler_registration *reginfo,

                     netsnmp_agent_request_info *reqinfo,

                     netsnmp_request_info *requests)

{

    DEBUGMSGTL(("helper:null", "Got request\n"));

    DEBUGMSGTL(("helper:null", "  oid:"));

    DEBUGMSGOID(("helper:null", requests->requestvb->name,

                 requests->requestvb->name_length));

    DEBUGMSG(("helper:null", "\n"));

    switch (reqinfo->mode) {

    case MODE_GETNEXT:

    case MODE_GETBULK:

        return SNMP_ERR_NOERROR;

    case MODE_GET:

        netsnmp_request_set_error_all(requests, SNMP_NOSUCHOBJECT);

        return SNMP_ERR_NOERROR;

    default:

        netsnmp_request_set_error_all(requests, SNMP_ERR_NOSUCHNAME);

        return SNMP_ERR_NOERROR;

    }

}