iftable_interface.c

snmp的源代码,已经在我的ubuntu下编译通过

/*
 * Note: this file originally auto-generated by mib2c using
 *       version : 1.42 $ of : mfd-interface.m2c,v $ 
 *
 * $Id: ifTable_interface.c,v 1.8.2.1 2004/12/10 18:01:34 rstory Exp $
 */
/*
 * *********************************************************************
 * *********************************************************************
 * *********************************************************************
 * ***                                                               ***
 * ***  NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE NOTE  ***
 * ***                                                               ***
 * ***                                                               ***
 * ***       THIS FILE DOES NOT CONTAIN ANY USER EDITABLE CODE.      ***
 * ***                                                               ***
 * ***                                                               ***
 * ***       THE GENERATED CODE IS INTERNAL IMPLEMENTATION, AND      ***
 * ***                                                               ***
 * ***                                                               ***
 * ***    IS SUBJECT TO CHANGE WITHOUT WARNING IN FUTURE RELEASES.   ***
 * ***                                                               ***
 * ***                                                               ***
 * *********************************************************************
 * *********************************************************************
 * *********************************************************************
 */

/*
 * standard Net-SNMP includes 
 */
#include <net-snmp/net-snmp-config.h>
#include <net-snmp/net-snmp-includes.h>
#include <net-snmp/agent/net-snmp-agent-includes.h>

/*
 * include our parent header 
 */
#include "ifTable.h"


#include <net-snmp/library/container.h>

#include "ifTable_interface.h"

/**********************************************************************
 **********************************************************************
 ***
 *** Table ifTable
 ***
 **********************************************************************
 **********************************************************************/
/*
 * ifTable is subid 2 of interfaces.
 * Its status is Current.
 * OID: .1.3.6.1.2.1.2.2, length: 8
 */
typedef struct ifTable_interface_ctx_s {

    netsnmp_container *container;
    netsnmp_cache  *cache;      /* optional cache */

    ifTable_registration_ptr user_ctx;

    netsnmp_table_registration_info tbl_info;

    netsnmp_baby_steps_access_methods access_multiplexer;

} ifTable_interface_ctx;

static ifTable_interface_ctx ifTable_if_ctx;

static void     _ifTable_container_init(ifTable_interface_ctx * if_ctx);


static Netsnmp_Node_Handler _mfd_ifTable_pre_request;
static Netsnmp_Node_Handler _mfd_ifTable_post_request;
static Netsnmp_Node_Handler _mfd_ifTable_object_lookup;
static Netsnmp_Node_Handler _mfd_ifTable_get_values;
static Netsnmp_Node_Handler _mfd_ifTable_check_objects;
static Netsnmp_Node_Handler _mfd_ifTable_undo_setup;
static Netsnmp_Node_Handler _mfd_ifTable_set_values;
static Netsnmp_Node_Handler _mfd_ifTable_undo_cleanup;
static Netsnmp_Node_Handler _mfd_ifTable_undo_values;
static Netsnmp_Node_Handler _mfd_ifTable_commit;
static Netsnmp_Node_Handler _mfd_ifTable_undo_commit;
static Netsnmp_Node_Handler _mfd_ifTable_check_dependencies;

NETSNMP_STATIC_INLINE int _ifTable_undo_column(ifTable_rowreq_ctx *
                                               rowreq_ctx,
                                               netsnmp_variable_list * var,
                                               int column);

ifTable_data   *ifTable_allocate_data(void);

/**
 * common init of container for ifTable and ifXTable
 */
void
if_mib_container_init(void)
{
    static done = 0;

    if (done)
        return;

    DEBUGMSGTL(("internal:ifTable:ifTable_container_init", "called\n"));

    done = 1;

    /*
     * set up the container. This is outside the rewrite ifdef, because
     * the container is used by the ifXTable too..
     */
    _ifTable_container_init(&ifTable_if_ctx);
}

/**
 * @internal
 * Initialize the table ifTable 
 *    (Define its contents and how it's structured)
 */
void
_ifTable_initialize_interface(ifTable_registration_ptr reg_ptr,
                              u_long flags)
{
    netsnmp_baby_steps_access_methods *access_multiplexer =
        &ifTable_if_ctx.access_multiplexer;
    netsnmp_table_registration_info *tbl_info = &ifTable_if_ctx.tbl_info;
    netsnmp_handler_registration *reginfo;
    netsnmp_mib_handler *handler;
    int             mfd_modes = 0;

    DEBUGMSGTL(("internal:ifTable:_ifTable_initialize_interface",
                "called\n"));

    (void) if_mib_container_init();
    if (NULL == ifTable_if_ctx.container)
        return; /* msg already logged */

#ifdef NETSNMP_ENABLE_MFD_REWRITES
    /*************************************************
     *
     * save interface context for ifTable
     */
    /*
     * Setting up the table's definition
     */
    netsnmp_table_helper_add_indexes(tbl_info, ASN_INTEGER,
                                               /** index: ifIndex */
                                     0);

    /*
     * Define the minimum and maximum accessible columns.  This
     * optimizes retrival. 
     */
    tbl_info->min_column = IFTABLE_MIN_COL;
    tbl_info->max_column = IFTABLE_MAX_COL;

    /*
     * save users context
     */
    ifTable_if_ctx.user_ctx = reg_ptr;

    /*
     * call data access initialization code
     */
    ifTable_init_data(reg_ptr);

    /*
     * access_multiplexer: REQUIRED wrapper for get request handling
     */
    access_multiplexer->object_lookup = _mfd_ifTable_object_lookup;
    access_multiplexer->get_values = _mfd_ifTable_get_values;

    /*
     * no wrappers yet
     */
    access_multiplexer->pre_request = _mfd_ifTable_pre_request;
    access_multiplexer->post_request = _mfd_ifTable_post_request;


    /*
     * REQUIRED wrappers for set request handling
     */
    access_multiplexer->object_syntax_checks = _mfd_ifTable_check_objects;
    access_multiplexer->undo_setup = _mfd_ifTable_undo_setup;
    access_multiplexer->undo_cleanup = _mfd_ifTable_undo_cleanup;
    access_multiplexer->set_values = _mfd_ifTable_set_values;
    access_multiplexer->undo_sets = _mfd_ifTable_undo_values;

    /*
     * no wrappers yet
     */
    access_multiplexer->commit = _mfd_ifTable_commit;
    access_multiplexer->undo_commit = _mfd_ifTable_undo_commit;

    /*
     * REQUIRED for tables with dependencies
     */
    access_multiplexer->consistency_checks =
        _mfd_ifTable_check_dependencies;

    /*************************************************
     *
     * Create a registration, save our reg data, register table.
     */
    DEBUGMSGTL(("ifTable:init_ifTable",
                "Registering ifTable as a mibs-for-dummies table.\n"));
    handler =
        netsnmp_baby_steps_access_multiplexer_get(access_multiplexer);
    reginfo =
        netsnmp_handler_registration_create("ifTable", handler,
                                            ifTable_oid, ifTable_oid_size,
                                            HANDLER_CAN_BABY_STEP |
                                            HANDLER_CAN_RWRITE);
    if (NULL == reginfo) {
        snmp_log(LOG_ERR, "error registering table ifTable\n");
        return;
    }
    reginfo->my_reg_void = &ifTable_if_ctx;

    /*************************************************
     *
     * set up baby steps handler, create it and inject it
     */
    if (access_multiplexer->object_lookup)
        mfd_modes |= BABY_STEP_OBJECT_LOOKUP;
    if (access_multiplexer->set_values)
        mfd_modes |= BABY_STEP_SET_VALUES;
    if (access_multiplexer->irreversible_commit)
        mfd_modes |= BABY_STEP_IRREVERSIBLE_COMMIT;
    if (access_multiplexer->object_syntax_checks)
        mfd_modes |= BABY_STEP_CHECK_OBJECT;

    if (access_multiplexer->pre_request)
        mfd_modes |= BABY_STEP_PRE_REQUEST;
    if (access_multiplexer->post_request)
        mfd_modes |= BABY_STEP_POST_REQUEST;

    if (access_multiplexer->undo_setup)
        mfd_modes |= BABY_STEP_UNDO_SETUP;
    if (access_multiplexer->undo_cleanup)
        mfd_modes |= BABY_STEP_UNDO_CLEANUP;
    if (access_multiplexer->undo_sets)
        mfd_modes |= BABY_STEP_UNDO_SETS;

    if (access_multiplexer->row_creation)
        mfd_modes |= BABY_STEP_ROW_CREATE;
    if (access_multiplexer->consistency_checks)
        mfd_modes |= BABY_STEP_CHECK_CONSISTENCY;
    if (access_multiplexer->commit)
        mfd_modes |= BABY_STEP_COMMIT;
    if (access_multiplexer->undo_commit)
        mfd_modes |= BABY_STEP_UNDO_COMMIT;

    handler = netsnmp_baby_steps_handler_get(mfd_modes);
    netsnmp_inject_handler(reginfo, handler);

    /*************************************************
     *
     * inject row_merge helper with prefix rootoid_len + 2 (entry.col)
     */
    handler = netsnmp_get_row_merge_handler(reginfo->rootoid_len + 2);
    netsnmp_inject_handler(reginfo, handler);

    /*************************************************
     *
     * inject container_table helper
     */
    handler =
        netsnmp_container_table_handler_get(tbl_info,
                                            ifTable_if_ctx.container,
                                            TABLE_CONTAINER_KEY_NETSNMP_INDEX);
    netsnmp_inject_handler(reginfo, handler);

    /*************************************************
     *
     * inject cache helper
     */
    if (NULL != ifTable_if_ctx.cache) {
        handler = netsnmp_cache_handler_get(ifTable_if_ctx.cache);
        netsnmp_inject_handler(reginfo, handler);
    }

    /*
     * register table
     */
    netsnmp_register_table(reginfo, tbl_info);
#endif                          /* NETSNMP_ENABLE_MFD_REWRITES */
}                               /* _ifTable_initialize_interface */

void
ifTable_valid_columns_set(netsnmp_column_info *vc)
{
    ifTable_if_ctx.tbl_info.valid_columns = vc;
}                               /* ifTable_valid_columns_set */

/**
 * @internal
 * convert the index component stored in the context to an oid
 */
int
ifTable_index_to_oid(netsnmp_index * oid_idx, ifTable_mib_index * mib_idx)
{
    int             err = SNMP_ERR_NOERROR;

    /*
     * temp storage for parsing indexes
     */
    /*
     * ifIndex(1)/InterfaceIndex/ASN_INTEGER/long(long)//l/A/w/e/R/d/H
     */
    netsnmp_variable_list var_ifIndex;

    /*
     * set up varbinds
     */
    memset(&var_ifIndex, 0x00, sizeof(var_ifIndex));
    var_ifIndex.type = ASN_INTEGER;

    /*
     * chain temp index varbinds together
     */
    var_ifIndex.next_variable = NULL;


    DEBUGMSGTL(("verbose:ifTable:ifTable_index_to_oid", "called\n"));

    /*
     * ifIndex(1)/InterfaceIndex/ASN_INTEGER/long(long)//l/A/w/e/R/d/H 
     */
    snmp_set_var_value(&var_ifIndex, (u_char *) & mib_idx->ifIndex,
                       sizeof(mib_idx->ifIndex));


    err = build_oid_noalloc(oid_idx->oids, oid_idx->len, &oid_idx->len,
                            NULL, 0, &var_ifIndex);
    if (err)
        snmp_log(LOG_ERR, "error %d converting index to oid\n");

    /*
     * parsing may have allocated memory. free it.
     */
    snmp_reset_var_buffers(&var_ifIndex);

    return err;
}                               /* ifTable_index_to_oid */

/**
 * extract ifTable indexes from a netsnmp_index
 *
 * @retval SNMP_ERR_NOERROR  : no error
 * @retval SNMP_ERR_GENERR   : error
 */
int
ifTable_index_from_oid(netsnmp_index * oid_idx,
                       ifTable_mib_index * mib_idx)
{
    int             err = SNMP_ERR_NOERROR;

    /*
     * temp storage for parsing indexes
     */
    /*
     * ifIndex(1)/InterfaceIndex/ASN_INTEGER/long(long)//l/A/w/e/R/d/H
     */
    netsnmp_variable_list var_ifIndex;

    /*
     * set up varbinds
     */
    memset(&var_ifIndex, 0x00, sizeof(var_ifIndex));
    var_ifIndex.type = ASN_INTEGER;

    /*
     * chain temp index varbinds together
     */