ifxtable_interface.c

开发snmp的开发包有两个开放的SNMP开发库

    void            (*dataFreeHook) (void *);
    int             rc;

    DEBUGMSGTL(("internal:ifXTable:_mfd_ifXTable_get_values", "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);

    for (; requests; requests = requests->next) {
        /*
         * save old pointer, so we can free it if replaced
         */
        old_string = requests->requestvb->val.string;
        dataFreeHook = requests->requestvb->dataFreeHook;
        if (NULL == requests->requestvb->val.string) {
            requests->requestvb->val.string = requests->requestvb->buf;
            requests->requestvb->val_len =
                sizeof(requests->requestvb->buf);
        } else if (requests->requestvb->buf ==
                   requests->requestvb->val.string) {
            if (requests->requestvb->val_len !=
                sizeof(requests->requestvb->buf))
                requests->requestvb->val_len =
                    sizeof(requests->requestvb->buf);
        }

        /*
         * get column data
         */
        tri = netsnmp_extract_table_info(requests);
        if (NULL == tri)
            continue;

        rc = _ifXTable_get_column(rowreq_ctx, requests->requestvb,
                                  tri->colnum);
        if (rc) {
            if (MFD_SKIP == rc) {
                requests->requestvb->type = SNMP_NOSUCHINSTANCE;
                rc = SNMP_ERR_NOERROR;
            }
        } else if (NULL == requests->requestvb->val.string) {
            snmp_log(LOG_ERR, "NULL varbind data pointer!\n");
            rc = SNMP_ERR_GENERR;
        }
        if (rc)
            netsnmp_request_set_error(requests, SNMP_VALIDATE_ERR(rc));

        /*
         * if the buffer wasn't used previously for the old data (i.e. it
         * was allcoated memory)  and the get routine replaced the pointer,
         * we need to free the previous pointer.
         */
        if (old_string && (old_string != requests->requestvb->buf) &&
            (requests->requestvb->val.string != old_string)) {
            if (dataFreeHook)
                (*dataFreeHook) (old_string);
            else
                free(old_string);
        }
    }                           /* for results */

    return SNMP_ERR_NOERROR;
}                               /* _mfd_ifXTable_get_values */

/***********************************************************************
 *
 * SET processing
 *
 ***********************************************************************/

/*----------------------------------------------------------------------
 *
 * SET: Syntax checks
 *
 *---------------------------------------------------------------------*/
/*
 * @internal
 * Check the syntax for a particular column
 */
NETSNMP_STATIC_INLINE int
_ifXTable_check_column(ifXTable_rowreq_ctx * rowreq_ctx,
                       netsnmp_variable_list * var, int column)
{
    int             rc = SNMPERR_SUCCESS;

    DEBUGMSGTL(("internal:ifXTable:_ifXTable_check_column",
                "called for %d\n", column));

    netsnmp_assert(NULL != rowreq_ctx);

    switch (column) {

        /*
         * ifName(1)/DisplayString/ASN_OCTET_STR/char(char)//L/A/w/e/R/d/H 
         */
    case COLUMN_IFNAME:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifInMulticastPkts(2)/COUNTER/ASN_COUNTER/u_long(u_long)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFINMULTICASTPKTS:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifInBroadcastPkts(3)/COUNTER/ASN_COUNTER/u_long(u_long)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFINBROADCASTPKTS:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifOutMulticastPkts(4)/COUNTER/ASN_COUNTER/u_long(u_long)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFOUTMULTICASTPKTS:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifOutBroadcastPkts(5)/COUNTER/ASN_COUNTER/u_long(u_long)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFOUTBROADCASTPKTS:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifHCInOctets(6)/COUNTER64/ASN_COUNTER64/U64(U64)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFHCINOCTETS:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifHCInUcastPkts(7)/COUNTER64/ASN_COUNTER64/U64(U64)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFHCINUCASTPKTS:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifHCInMulticastPkts(8)/COUNTER64/ASN_COUNTER64/U64(U64)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFHCINMULTICASTPKTS:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifHCInBroadcastPkts(9)/COUNTER64/ASN_COUNTER64/U64(U64)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFHCINBROADCASTPKTS:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifHCOutOctets(10)/COUNTER64/ASN_COUNTER64/U64(U64)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFHCOUTOCTETS:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifHCOutUcastPkts(11)/COUNTER64/ASN_COUNTER64/U64(U64)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFHCOUTUCASTPKTS:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifHCOutMulticastPkts(12)/COUNTER64/ASN_COUNTER64/U64(U64)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFHCOUTMULTICASTPKTS:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifHCOutBroadcastPkts(13)/COUNTER64/ASN_COUNTER64/U64(U64)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFHCOUTBROADCASTPKTS:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifLinkUpDownTrapEnable(14)/INTEGER/ASN_INTEGER/long(u_long)//l/A/W/E/r/d/h 
         */
    case COLUMN_IFLINKUPDOWNTRAPENABLE:
        rc = netsnmp_check_vb_type_and_size(var, ASN_INTEGER,
                                            sizeof(rowreq_ctx->data.
                                                   ifLinkUpDownTrapEnable));
        /*
         * check that the value is one of defined enums 
         */
        if ((SNMPERR_SUCCESS == rc)
            && (*var->val.integer != IFLINKUPDOWNTRAPENABLE_ENABLED)
            && (*var->val.integer != IFLINKUPDOWNTRAPENABLE_DISABLED)
            ) {
            rc = SNMP_ERR_WRONGVALUE;
        }
        if (SNMPERR_SUCCESS != rc) {
            DEBUGMSGTL(("ifXTable:_ifXTable_check_column:ifLinkUpDownTrapEnable", "varbind validation failed (eg bad type or size)\n"));
        } else {
            rc = ifLinkUpDownTrapEnable_check_value(rowreq_ctx,
                                                    *((u_long *) var->val.
                                                      string));
            if ((MFD_SUCCESS != rc) && (MFD_NOT_VALID_EVER != rc)
                && (MFD_NOT_VALID_NOW != rc)) {
                snmp_log(LOG_ERR,
                         "bad rc %d from ifLinkUpDownTrapEnable_check_value\n",
                         rc);
                rc = SNMP_ERR_GENERR;
            }
        }
        break;

        /*
         * ifHighSpeed(15)/GAUGE/ASN_GAUGE/u_long(u_long)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFHIGHSPEED:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifPromiscuousMode(16)/TruthValue/ASN_INTEGER/long(u_long)//l/A/W/E/r/d/h 
         */
    case COLUMN_IFPROMISCUOUSMODE:
        rc = netsnmp_check_vb_type_and_size(var, ASN_INTEGER,
                                            sizeof(rowreq_ctx->data.
                                                   ifPromiscuousMode));
        /*
         * check that the value is one of defined enums 
         */
        if ((SNMPERR_SUCCESS == rc)
            && (*var->val.integer != TRUTHVALUE_TRUE)
            && (*var->val.integer != TRUTHVALUE_FALSE)
            ) {
            rc = SNMP_ERR_WRONGVALUE;
        }
        if (SNMPERR_SUCCESS != rc) {
            DEBUGMSGTL(("ifXTable:_ifXTable_check_column:ifPromiscuousMode", "varbind validation failed (eg bad type or size)\n"));
        } else {
            rc = ifPromiscuousMode_check_value(rowreq_ctx,
                                               *((u_long *) var->val.
                                                 string));
            if ((MFD_SUCCESS != rc) && (MFD_NOT_VALID_EVER != rc)
                && (MFD_NOT_VALID_NOW != rc)) {
                snmp_log(LOG_ERR,
                         "bad rc %d from ifPromiscuousMode_check_value\n",
                         rc);
                rc = SNMP_ERR_GENERR;
            }
        }
        break;

        /*
         * ifConnectorPresent(17)/TruthValue/ASN_INTEGER/long(u_long)//l/A/w/E/r/d/h 
         */
    case COLUMN_IFCONNECTORPRESENT:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

        /*
         * ifAlias(18)/DisplayString/ASN_OCTET_STR/char(char)//L/A/W/e/R/d/H 
         */
    case COLUMN_IFALIAS:
        rc = netsnmp_check_vb_type_and_max_size(var, ASN_OCTET_STR,
                                                sizeof(rowreq_ctx->data.
                                                       ifAlias));
        /*
         * check defined range(s). 
         */
        if ((SNMPERR_SUCCESS == rc)
            && ((var->val_len < 0) || (var->val_len > 64))
            ) {
            rc = SNMP_ERR_WRONGLENGTH;
        }
        if (SNMPERR_SUCCESS != rc) {
            DEBUGMSGTL(("ifXTable:_ifXTable_check_column:ifAlias",
                        "varbind validation failed (eg bad type or size)\n"));
        } else {
            rc = ifAlias_check_value(rowreq_ctx, (char *) var->val.string,
                                     var->val_len);
            if ((MFD_SUCCESS != rc) && (MFD_NOT_VALID_EVER != rc)
                && (MFD_NOT_VALID_NOW != rc)) {
                snmp_log(LOG_ERR, "bad rc %d from ifAlias_check_value\n",
                         rc);
                rc = SNMP_ERR_GENERR;
            }
        }
        break;

        /*
         * ifCounterDiscontinuityTime(19)/TimeStamp/ASN_TIMETICKS/u_long(u_long)//l/A/w/e/r/d/h 
         */
    case COLUMN_IFCOUNTERDISCONTINUITYTIME:
        rc = SNMP_ERR_NOTWRITABLE;
        break;

    default:   /** We shouldn't get here */
        rc = SNMP_ERR_GENERR;
        snmp_log(LOG_ERR, "unknown column %d in _ifXTable_check_column\n",
                 column);
    }

    return rc;
}                               /* _ifXTable_check_column */

int
_mfd_ifXTable_check_objects(netsnmp_mib_handler *handler,
                            netsnmp_handler_registration *reginfo,
                            netsnmp_agent_request_info *agtreq_info,
                            netsnmp_request_info *requests)
{
    ifXTable_rowreq_ctx *rowreq_ctx =
        netsnmp_container_table_row_extract(requests);
    netsnmp_table_request_info *tri;
    int             rc;

    DEBUGMSGTL(("internal:ifXTable:_mfd_ifXTable_check_objects",
                "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);

    for (; requests; requests = requests->next) {

        /*
         * get column number from table request info, and check that column
         */
        tri = netsnmp_extract_table_info(requests);
        if (NULL == tri)
            continue;

        rc = _ifXTable_check_column(rowreq_ctx, requests->requestvb,
                                    tri->colnum);
        if (rc) {
            netsnmp_request_set_error(requests, SNMP_VALIDATE_ERR(rc));
            break;
        }

    }                           /* for results */

    return SNMP_ERR_NOERROR;
}                               /* _mfd_ifXTable_check_objects */


/*----------------------------------------------------------------------
 *
 * SET: check dependencies
 *
 *---------------------------------------------------------------------*/
/*
 * @internal
 * Check dependencies wrapper
 */
static int
_mfd_ifXTable_check_dependencies(netsnmp_mib_handler *handler,
                                 netsnmp_handler_registration *reginfo,
                                 netsnmp_agent_request_info *agtreq_info,
                                 netsnmp_request_info *requests)
{
    int             rc;
    ifXTable_rowreq_ctx *rowreq_ctx =
        netsnmp_container_table_row_extract(requests);
    DEBUGMSGTL(("internal:ifXTable:_mfd_ifXTable_check_dependencies",
                "called\n"));

    netsnmp_assert(NULL != rowreq_ctx);

    rc = ifXTable_check_dependencies(rowreq_ctx);
    if (rc) {
        DEBUGMSGTL(("ifXTable:mfd", "error %d from "
                    "ifXTable_check_dependencies\n", rc));
        netsnmp_request_set_error_all(requests, SNMP_VALIDATE_ERR(rc));
    }

    return SNMP_ERR_NOERROR;
}                               /* _mfd_ifXTable_check_dependencies */

/*----------------------------------------------------------------------
 *
 * SET: Undo setup
 *
 *---------------------------------------------------------------------*/
/*
 * @internal
 * Set the value for a particular column
 */
NETSNMP_STATIC_INLINE int
_ifXTable_undo_setup_column(ifXTable_rowreq_ctx * rowreq_ctx, int column)
{
    int             rc = SNMPERR_SUCCESS;

    DEBUGMSGTL(("internal:ifXTable:_ifXTable_undo_setup_column",
                "called for %d\n", column));

    netsnmp_assert(NULL != rowreq_ctx);

    switch (column) {

        /*
         * ifLinkUpDownTrapEnable(14)/INTEGER/ASN_INTEGER/long(u_long)//l/A/W/E/r/d/h 
         */
    case COLUMN_IFLINKUPDOWNTRAPENABLE:
        rowreq_ctx->column_set_flags |= COLUMN_IFLINKUPDOWNTRAPENABLE_FLAG;
        rc = ifLinkUpDownTrapEnable_undo_setup(rowreq_ctx);
        break;

        /*
         * ifPromiscuousMode(16)/TruthValue/ASN_INTEGER/long(u_long)//l/A/W/E/r/d/h 
         */
    case COLUMN_IFPROMISCUOUSMODE:
        rowreq_ctx->column_set_flags |= COLUMN_IFPROMISCUOUSMODE_FLAG;
        rc = ifPromiscuousMode_undo_setup(rowreq_ctx);
        break;

        /*
         * ifAlias(18)/DisplayString/ASN_OCTET_STR/char(char)//L/A/W/e/R/d/H 
         */
    case COLUMN_IFALIAS:
        rowreq_ctx->column_set_flags |= COLUMN_IFALIAS_FLAG;
        rc = ifAlias_undo_setup(rowreq_ctx);
        break;