nslogging.c

snmp的源代码,已经在我的ubuntu下编译通过

#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/scalar.h>

#ifdef HAVE_STRING_H
#include <string.h>
#else
#include <strings.h>
#endif

#include <net-snmp/library/snmp_logging.h>
#include "agent/nsLogging.h"
#include "util_funcs.h"



/*
 * OID and columns for the logging table.
 */

#define  NSLOGGING_TYPE		3
#define  NSLOGGING_MAXLEVEL	4
#define  NSLOGGING_STATUS	5

oid nsLoggingTable_oid[]      = { 1, 3, 6, 1, 4, 1, 8072, 1, 7, 2, 1};


void
init_nsLogging(void)
{
    netsnmp_table_registration_info *table_info;
    netsnmp_iterator_info           *iinfo;

    /*
     * Register the table.
     * We need to define the column structure and indexing....
     */

    table_info = SNMP_MALLOC_TYPEDEF(netsnmp_table_registration_info);
    if (!table_info) {
        return;
    }
    netsnmp_table_helper_add_indexes(table_info, ASN_INTEGER,
                                                 ASN_PRIV_IMPLIED_OCTET_STR, 0);
    table_info->min_column = NSLOGGING_TYPE;
    table_info->max_column = NSLOGGING_STATUS;


    /*
     * .... and the iteration information ....
     */
    iinfo      = SNMP_MALLOC_TYPEDEF(netsnmp_iterator_info);
    if (!iinfo) {
        return;
    }
    iinfo->get_first_data_point = get_first_logging_entry;
    iinfo->get_next_data_point  = get_next_logging_entry;
    iinfo->table_reginfo        = table_info;


    /*
     * .... and register the table with the agent.
     */
    netsnmp_register_table_iterator(
        netsnmp_create_handler_registration(
            "tzLoggingTable", handle_nsLoggingTable,
            nsLoggingTable_oid, OID_LENGTH(nsLoggingTable_oid),
            HANDLER_CAN_RWRITE),
        iinfo);
}


/*
 * nsLoggingTable handling
 */

netsnmp_variable_list *
get_first_logging_entry(void **loop_context, void **data_context,
                      netsnmp_variable_list *index,
                      netsnmp_iterator_info *data)
{
    long temp;
    netsnmp_log_handler  *logh_head = get_logh_head();
    if ( !logh_head )
        return NULL;

    temp = logh_head->priority;
    snmp_set_var_value(index, (u_char*)&temp,
		                 sizeof(temp));
    if ( logh_head->token )
        snmp_set_var_value(index->next_variable, (const u_char*)logh_head->token,
		                                   strlen(logh_head->token));
    else
        snmp_set_var_value(index->next_variable, NULL, 0);
    *loop_context = (void*)logh_head;
    *data_context = (void*)logh_head;
    return index;
}

netsnmp_variable_list *
get_next_logging_entry(void **loop_context, void **data_context,
                      netsnmp_variable_list *index,
                      netsnmp_iterator_info *data)
{
    long temp;
    netsnmp_log_handler *logh = (netsnmp_log_handler *)*loop_context;
    logh = logh->next;

    if ( !logh )
        return NULL;

    temp = logh->priority;
    snmp_set_var_value(index, (u_char*)&temp,
		                 sizeof(temp));
    if ( logh->token )
        snmp_set_var_value(index->next_variable, (const u_char*)logh->token,
		                                   strlen(logh->token));
    else
        snmp_set_var_value(index->next_variable, NULL, 0);
    *loop_context = (void*)logh;
    *data_context = (void*)logh;
    return index;
}


int
handle_nsLoggingTable(netsnmp_mib_handler *handler,
                netsnmp_handler_registration *reginfo,
                netsnmp_agent_request_info *reqinfo,
                netsnmp_request_info *requests)
{
    long temp;
    netsnmp_request_info       *request     = NULL;
    netsnmp_table_request_info *table_info  = NULL;
    netsnmp_log_handler        *logh        = NULL;
    netsnmp_variable_list      *idx         = NULL;

    switch (reqinfo->mode) {

    case MODE_GET:
        for (request=requests; request; request=request->next) {
            if (requests->processed != 0)
                continue;
            logh = (netsnmp_log_handler*)netsnmp_extract_iterator_context(request);
            table_info  =                netsnmp_extract_table_info(request);

            switch (table_info->colnum) {
            case NSLOGGING_TYPE:
                if (!logh) {
                    netsnmp_set_request_error(reqinfo, request, SNMP_NOSUCHINSTANCE);
                    continue;
		}
		temp = logh->type;
	        snmp_set_var_typed_value(request->requestvb, ASN_INTEGER,
                                         (u_char*)&temp,
                                            sizeof(temp));
	        break;

            case NSLOGGING_MAXLEVEL:
                if (!logh) {
                    netsnmp_set_request_error(reqinfo, request, SNMP_NOSUCHINSTANCE);
                    continue;
		}
		temp = logh->pri_max;
	        snmp_set_var_typed_value(request->requestvb, ASN_INTEGER,
                                         (u_char*)&temp,
                                            sizeof(temp));
	        break;

            case NSLOGGING_STATUS:
                if (!logh) {
                    netsnmp_set_request_error(reqinfo, request, SNMP_NOSUCHINSTANCE);
                    continue;
		}
		temp = (logh->type ?
	                   (logh->enabled ?
	                      RS_ACTIVE:
	                      RS_NOTINSERVICE) :
	                    RS_NOTREADY);
	        snmp_set_var_typed_value(request->requestvb, ASN_INTEGER,
                                         (u_char*)&temp, sizeof(temp));
	        break;

            default:
                netsnmp_set_request_error(reqinfo, request, SNMP_NOSUCHOBJECT);
                continue;
	    }
	}
	break;


    case MODE_SET_RESERVE1:
        for (request=requests; request; request=request->next) {
            if ( request->status != 0 ) {
                return SNMP_ERR_NOERROR;	/* Already got an error */
            }
            logh = (netsnmp_log_handler*)netsnmp_extract_iterator_context(request);
            table_info  =                 netsnmp_extract_table_info(request);

            switch (table_info->colnum) {
            case NSLOGGING_TYPE:
                if ( request->requestvb->type != ASN_INTEGER ) {
                    netsnmp_set_request_error(reqinfo, request, SNMP_ERR_WRONGTYPE);
                    return SNMP_ERR_WRONGTYPE;
                }
                if (*request->requestvb->val.integer < 0 ) {
                    netsnmp_set_request_error(reqinfo, request, SNMP_ERR_WRONGVALUE);
                    return SNMP_ERR_WRONGVALUE;
                }
		/*
		 * It's OK to create a new logging entry
		 *  (either in one go, or built up using createAndWait)
		 *  but it's not possible to change the type of an entry
		 *  once it's been created.
		 */
                if (logh && logh->type) {
                    netsnmp_set_request_error(reqinfo, request, SNMP_ERR_NOTWRITABLE);
                    return SNMP_ERR_NOTWRITABLE;
		}
	        break;

            case NSLOGGING_MAXLEVEL:
                if ( request->requestvb->type != ASN_INTEGER ) {
                    netsnmp_set_request_error(reqinfo, request, SNMP_ERR_WRONGTYPE);
                    return SNMP_ERR_WRONGTYPE;
                }
                if (*request->requestvb->val.integer < 0 ||
                    *request->requestvb->val.integer > 7 ) {
                    netsnmp_set_request_error(reqinfo, request, SNMP_ERR_WRONGVALUE);
                    return SNMP_ERR_WRONGVALUE;
                }
	        break;

            case NSLOGGING_STATUS: