| /* |
| * table_container.c |
| * $Id$ |
| */ |
| |
| #include <net-snmp/net-snmp-config.h> |
| #include <net-snmp/net-snmp-features.h> |
| |
| #include <net-snmp/net-snmp-includes.h> |
| #include <net-snmp/agent/net-snmp-agent-includes.h> |
| |
| #include <net-snmp/agent/table_container.h> |
| |
| #if HAVE_STRING_H |
| #include <string.h> |
| #else |
| #include <strings.h> |
| #endif |
| |
| #include <net-snmp/agent/table.h> |
| #include <net-snmp/library/container.h> |
| #include <net-snmp/library/snmp_assert.h> |
| |
| netsnmp_feature_provide(table_container) |
| netsnmp_feature_child_of(table_container, table_container_all) |
| netsnmp_feature_child_of(table_container_replace_row, table_container_all) |
| netsnmp_feature_child_of(table_container_extract, table_container_all) |
| netsnmp_feature_child_of(table_container_management, table_container_all) |
| netsnmp_feature_child_of(table_container_row_remove, table_container_all) |
| netsnmp_feature_child_of(table_container_row_insert, table_container_all) |
| netsnmp_feature_child_of(table_container_all, mib_helpers) |
| |
| #ifndef NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER |
| |
| /* |
| * snmp.h:#define SNMP_MSG_INTERNAL_SET_BEGIN -1 |
| * snmp.h:#define SNMP_MSG_INTERNAL_SET_RESERVE1 0 |
| * snmp.h:#define SNMP_MSG_INTERNAL_SET_RESERVE2 1 |
| * snmp.h:#define SNMP_MSG_INTERNAL_SET_ACTION 2 |
| * snmp.h:#define SNMP_MSG_INTERNAL_SET_COMMIT 3 |
| * snmp.h:#define SNMP_MSG_INTERNAL_SET_FREE 4 |
| * snmp.h:#define SNMP_MSG_INTERNAL_SET_UNDO 5 |
| */ |
| |
| /* |
| * PRIVATE structure for holding important info for each table. |
| */ |
| typedef struct container_table_data_s { |
| |
| /** Number of handlers whose myvoid pointer points to this structure. */ |
| int refcnt; |
| |
| /** registration info for the table */ |
| netsnmp_table_registration_info *tblreg_info; |
| |
| /** container for the table rows */ |
| netsnmp_container *table; |
| |
| /* |
| * mutex_type lock; |
| */ |
| |
| /* what type of key do we want? */ |
| char key_type; |
| |
| } container_table_data; |
| |
| /** @defgroup table_container table_container |
| * Helps you implement a table when data can be found via a netsnmp_container. |
| * @ingroup table |
| * |
| * The table_container handler is used (automatically) in conjuntion |
| * with the @link table table@endlink handler. |
| * |
| * This handler will use the index information provided by |
| * the @link table @endlink handler to find the row needed to process |
| * the request. |
| * |
| * The container must use one of 3 key types. It is the sub-handler's |
| * responsibility to ensure that the container and key type match (unless |
| * neither is specified, in which case a default will be used.) |
| * |
| * The current key types are: |
| * |
| * TABLE_CONTAINER_KEY_NETSNMP_INDEX |
| * The container should do comparisons based on a key that may be cast |
| * to a netsnmp index (netsnmp_index *). This index contains only the |
| * index portion of the OID, not the entire OID. |
| * |
| * TABLE_CONTAINER_KEY_VARBIND_INDEX |
| * The container should do comparisons based on a key that may be cast |
| * to a netsnmp variable list (netsnmp_variable_list *). This variable |
| * list will contain one varbind for each index component. |
| * |
| * TABLE_CONTAINER_KEY_VARBIND_RAW (NOTE: unimplemented) |
| * While not yet implemented, future plans include passing the request |
| * varbind with the full OID to a container. |
| * |
| * If a key type is not specified at registration time, the default key type |
| * of TABLE_CONTAINER_KEY_NETSNMP_INDEX will be used. If a container is |
| * provided, or the handler name is aliased to a container type, the container |
| * must use a netsnmp index. |
| * |
| * If no container is provided, a lookup will be made based on the |
| * sub-handler's name, or if that isn't found, "table_container". The |
| * table_container key type will be netsnmp_index. |
| * |
| * The container must, at a minimum, implement find and find_next. If a NULL |
| * key is passed to the container, it must return the first item, if any. |
| * All containers provided by net-snmp fulfil this requirement. |
| * |
| * This handler will only register to process 'data lookup' modes. In |
| * traditional net-snmp modes, that is any GET-like mode (GET, GET-NEXT, |
| * GET-BULK) or the first phase of a SET (RESERVE1). In the new baby-steps |
| * mode, DATA_LOOKUP is it's own mode, and is a pre-cursor to other modes. |
| * |
| * When called, the handler will call the appropriate container method |
| * with the appropriate key type. If a row was not found, the result depends |
| * on the mode. |
| * |
| * GET Processing |
| * An exact match must be found. If one is not, the error NOSUCHINSTANCE |
| * is set. |
| * |
| * GET-NEXT / GET-BULK |
| * If no row is found, the column number will be increased (using any |
| * valid_columns structure that may have been provided), and the first row |
| * will be retrieved. If no first row is found, the processed flag will be |
| * set, so that the sub-handler can skip any processing related to the |
| * request. The agent will notice this unsatisfied request, and attempt to |
| * pass it to the next appropriate handler. |
| * |
| * SET |
| * If the hander did not register with the HANDLER_CAN_NOT_CREATE flag |
| * set in the registration modes, it is assumed that this is a row |
| * creation request and a NULL row is added to the request's data list. |
| * The sub-handler is responsbile for dealing with any row creation |
| * contraints and inserting any newly created rows into the container |
| * and the request's data list. |
| * |
| * If a row is found, it will be inserted into |
| * the request's data list. The sub-handler may retrieve it by calling |
| * netsnmp_container_table_extract_context(request); * |
| * NOTE NOTE NOTE: |
| * |
| * This helper and it's API are still being tested and are subject to change. |
| * |
| * @{ |
| */ |
| |
| static int |
| _container_table_handler(netsnmp_mib_handler *handler, |
| netsnmp_handler_registration *reginfo, |
| netsnmp_agent_request_info *agtreq_info, |
| netsnmp_request_info *requests); |
| |
| static void * |
| _find_next_row(netsnmp_container *c, |
| netsnmp_table_request_info *tblreq, |
| void * key); |
| |
| /********************************************************************** |
| ********************************************************************** |
| * * |
| * * |
| * PUBLIC Registration functions * |
| * * |
| * * |
| ********************************************************************** |
| **********************************************************************/ |
| |
| /* ================================== |
| * |
| * Container Table API: Table maintenance |
| * |
| * ================================== */ |
| |
| #ifndef NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER_MANAGEMENT |
| container_table_data * |
| netsnmp_tcontainer_create_table( const char *name, |
| netsnmp_container *container, long flags ) |
| { |
| container_table_data *table; |
| |
| table = SNMP_MALLOC_TYPEDEF(container_table_data); |
| if (!table) |
| return NULL; |
| if (container) |
| table->table = container; |
| else { |
| table->table = netsnmp_container_find("table_container"); |
| if (!table->table) { |
| SNMP_FREE(table); |
| return NULL; |
| } |
| } |
| |
| if (flags) |
| table->key_type = (char)(flags & 0x03); /* Use lowest two bits */ |
| else |
| table->key_type = TABLE_CONTAINER_KEY_NETSNMP_INDEX; |
| |
| if (!table->table->compare) |
| table->table->compare = netsnmp_compare_netsnmp_index; |
| if (!table->table->ncompare) |
| table->table->ncompare = netsnmp_ncompare_netsnmp_index; |
| |
| return table; |
| } |
| |
| void |
| netsnmp_tcontainer_delete_table( container_table_data *table ) |
| { |
| if (!table) |
| return; |
| |
| if (table->table) |
| CONTAINER_FREE(table->table); |
| |
| SNMP_FREE(table); |
| return; |
| } |
| #endif /* NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER_MANAGEMENT */ |
| |
| /* |
| * The various standalone row operation routines |
| * (create/clone/copy/delete) |
| * will be specific to a particular table, |
| * so can't be implemented here. |
| */ |
| |
| int |
| netsnmp_tcontainer_add_row( container_table_data *table, netsnmp_index *row ) |
| { |
| if (!table || !table->table || !row) |
| return -1; |
| CONTAINER_INSERT( table->table, row ); |
| return 0; |
| } |
| |
| netsnmp_index * |
| netsnmp_tcontainer_remove_row( container_table_data *table, netsnmp_index *row ) |
| { |
| if (!table || !table->table || !row) |
| return NULL; |
| CONTAINER_REMOVE( table->table, row ); |
| return NULL; |
| } |
| |
| #ifndef NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER_REPLACE_ROW |
| int |
| netsnmp_tcontainer_replace_row( container_table_data *table, |
| netsnmp_index *old_row, netsnmp_index *new_row ) |
| { |
| if (!table || !table->table || !old_row || !new_row) |
| return -1; |
| netsnmp_tcontainer_remove_row( table, old_row ); |
| netsnmp_tcontainer_add_row( table, new_row ); |
| return 0; |
| } |
| #endif /* NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER_REPLACE_ROW */ |
| |
| /* netsnmp_tcontainer_remove_delete_row() will be table-specific too */ |
| |
| |
| /* ================================== |
| * |
| * Container Table API: MIB maintenance |
| * |
| * ================================== */ |
| |
| static container_table_data * |
| netsnmp_container_table_data_clone(container_table_data *tad) |
| { |
| ++tad->refcnt; |
| return tad; |
| } |
| |
| static void |
| netsnmp_container_table_data_free(container_table_data *tad) |
| { |
| if (--tad->refcnt == 0) |
| free(tad); |
| } |
| |
| /** returns a netsnmp_mib_handler object for the table_container helper */ |
| netsnmp_mib_handler * |
| netsnmp_container_table_handler_get(netsnmp_table_registration_info *tabreg, |
| netsnmp_container *container, char key_type) |
| { |
| container_table_data *tad; |
| netsnmp_mib_handler *handler; |
| |
| if (NULL == tabreg) { |
| snmp_log(LOG_ERR, "bad param in netsnmp_container_table_register\n"); |
| return NULL; |
| } |
| |
| tad = SNMP_MALLOC_TYPEDEF(container_table_data); |
| handler = netsnmp_create_handler("table_container", |
| _container_table_handler); |
| if((NULL == tad) || (NULL == handler)) { |
| if(tad) free(tad); /* SNMP_FREE wasted on locals */ |
| if(handler) free(handler); /* SNMP_FREE wasted on locals */ |
| snmp_log(LOG_ERR, |
| "malloc failure in netsnmp_container_table_register\n"); |
| return NULL; |
| } |
| |
| tad->refcnt = 1; |
| tad->tblreg_info = tabreg; /* we need it too, but it really is not ours */ |
| if(key_type) |
| tad->key_type = key_type; |
| else |
| tad->key_type = TABLE_CONTAINER_KEY_NETSNMP_INDEX; |
| |
| if(NULL == container) |
| container = netsnmp_container_find("table_container"); |
| tad->table = container; |
| |
| if (NULL==container->compare) |
| container->compare = netsnmp_compare_netsnmp_index; |
| if (NULL==container->ncompare) |
| container->ncompare = netsnmp_ncompare_netsnmp_index; |
| |
| handler->myvoid = (void*)tad; |
| handler->data_clone = (void *(*)(void *))netsnmp_container_table_data_clone; |
| handler->data_free = (void (*)(void *))netsnmp_container_table_data_free; |
| handler->flags |= MIB_HANDLER_AUTO_NEXT; |
| |
| return handler; |
| } |
| |
| int |
| netsnmp_container_table_register(netsnmp_handler_registration *reginfo, |
| netsnmp_table_registration_info *tabreg, |
| netsnmp_container *container, char key_type ) |
| { |
| netsnmp_mib_handler *handler; |
| |
| if ((NULL == reginfo) || (NULL == reginfo->handler) || (NULL == tabreg)) { |
| snmp_log(LOG_ERR, "bad param in netsnmp_container_table_register\n"); |
| return SNMPERR_GENERR; |
| } |
| |
| if (NULL==container) |
| container = netsnmp_container_find(reginfo->handlerName); |
| |
| handler = netsnmp_container_table_handler_get(tabreg, container, key_type); |
| netsnmp_inject_handler(reginfo, handler ); |
| |
| return netsnmp_register_table(reginfo, tabreg); |
| } |
| |
| int |
| netsnmp_container_table_unregister(netsnmp_handler_registration *reginfo) |
| { |
| container_table_data *tad; |
| |
| if (!reginfo) |
| return MIB_UNREGISTRATION_FAILED; |
| tad = (container_table_data *) |
| netsnmp_find_handler_data_by_name(reginfo, "table_container"); |
| if (tad) { |
| CONTAINER_FREE( tad->table ); |
| tad->table = NULL; |
| /* |
| * Note: don't free the memory tad points at here - that is done |
| * by netsnmp_container_table_data_free(). |
| */ |
| } |
| return netsnmp_unregister_table( reginfo ); |
| } |
| |
| /** retrieve the container used by the table_container helper */ |
| #ifndef NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER_EXTRACT |
| netsnmp_container* |
| netsnmp_container_table_container_extract(netsnmp_request_info *request) |
| { |
| return (netsnmp_container *) |
| netsnmp_request_get_list_data(request, TABLE_CONTAINER_CONTAINER); |
| } |
| #endif /* NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER_EXTRACT */ |
| |
| #ifndef NETSNMP_USE_INLINE |
| /** find the context data used by the table_container helper */ |
| void * |
| netsnmp_container_table_row_extract(netsnmp_request_info *request) |
| { |
| /* |
| * NOTE: this function must match in table_container.c and table_container.h. |
| * if you change one, change them both! |
| */ |
| return netsnmp_request_get_list_data(request, TABLE_CONTAINER_ROW); |
| } |
| /** find the context data used by the table_container helper */ |
| void * |
| netsnmp_container_table_extract_context(netsnmp_request_info *request) |
| { |
| /* |
| * NOTE: this function must match in table_container.c and table_container.h. |
| * if you change one, change them both! |
| */ |
| return netsnmp_request_get_list_data(request, TABLE_CONTAINER_ROW); |
| } |
| #endif /* inline */ |
| |
| #ifndef NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER_ROW_INSERT |
| /** inserts a newly created table_container entry into a request list */ |
| void |
| netsnmp_container_table_row_insert(netsnmp_request_info *request, |
| netsnmp_index *row) |
| { |
| netsnmp_request_info *req; |
| netsnmp_table_request_info *table_info = NULL; |
| netsnmp_variable_list *this_index = NULL; |
| netsnmp_variable_list *that_index = NULL; |
| oid base_oid[] = {0, 0}; /* Make sure index OIDs are legal! */ |
| oid this_oid[MAX_OID_LEN]; |
| oid that_oid[MAX_OID_LEN]; |
| size_t this_oid_len, that_oid_len; |
| |
| if (!request) |
| return; |
| |
| /* |
| * We'll add the new row information to any request |
| * structure with the same index values as the request |
| * passed in (which includes that one!). |
| * |
| * So construct an OID based on these index values. |
| */ |
| |
| table_info = netsnmp_extract_table_info(request); |
| this_index = table_info->indexes; |
| build_oid_noalloc(this_oid, MAX_OID_LEN, &this_oid_len, |
| base_oid, 2, this_index); |
| |
| /* |
| * We need to look through the whole of the request list |
| * (as received by the current handler), as there's no |
| * guarantee that this routine will be called by the first |
| * varbind that refers to this row. |
| * In particular, a RowStatus controlled row creation |
| * may easily occur later in the variable list. |
| * |
| * So first, we rewind to the head of the list.... |
| */ |
| for (req=request; req->prev; req=req->prev) |
| ; |
| |
| /* |
| * ... and then start looking for matching indexes |
| * (by constructing OIDs from these index values) |
| */ |
| for (; req; req=req->next) { |
| if (req->processed) |
| continue; |
| |
| table_info = netsnmp_extract_table_info(req); |
| that_index = table_info->indexes; |
| build_oid_noalloc(that_oid, MAX_OID_LEN, &that_oid_len, |
| base_oid, 2, that_index); |
| |
| /* |
| * This request has the same index values, |
| * so add the newly-created row information. |
| */ |
| if (snmp_oid_compare(this_oid, this_oid_len, |
| that_oid, that_oid_len) == 0) { |
| netsnmp_request_add_list_data(req, |
| netsnmp_create_data_list(TABLE_CONTAINER_ROW, row, NULL)); |
| } |
| } |
| } |
| #endif /* NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER_ROW_INSERT */ |
| |
| #ifndef NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER_ROW_REMOVE |
| /** removes a table_container entry from a request list */ |
| void |
| netsnmp_container_table_row_remove(netsnmp_request_info *request, |
| netsnmp_index *row) |
| { |
| netsnmp_request_info *req; |
| netsnmp_table_request_info *table_info = NULL; |
| netsnmp_variable_list *this_index = NULL; |
| netsnmp_variable_list *that_index = NULL; |
| oid base_oid[] = {0, 0}; /* Make sure index OIDs are legal! */ |
| oid this_oid[MAX_OID_LEN]; |
| oid that_oid[MAX_OID_LEN]; |
| size_t this_oid_len, that_oid_len; |
| |
| if (!request) |
| return; |
| |
| /* |
| * We'll add the new row information to any request |
| * structure with the same index values as the request |
| * passed in (which includes that one!). |
| * |
| * So construct an OID based on these index values. |
| */ |
| |
| table_info = netsnmp_extract_table_info(request); |
| this_index = table_info->indexes; |
| build_oid_noalloc(this_oid, MAX_OID_LEN, &this_oid_len, |
| base_oid, 2, this_index); |
| |
| /* |
| * We need to look through the whole of the request list |
| * (as received by the current handler), as there's no |
| * guarantee that this routine will be called by the first |
| * varbind that refers to this row. |
| * In particular, a RowStatus controlled row creation |
| * may easily occur later in the variable list. |
| * |
| * So first, we rewind to the head of the list.... |
| */ |
| for (req=request; req->prev; req=req->prev) |
| ; |
| |
| /* |
| * ... and then start looking for matching indexes |
| * (by constructing OIDs from these index values) |
| */ |
| for (; req; req=req->next) { |
| if (req->processed) |
| continue; |
| |
| table_info = netsnmp_extract_table_info(req); |
| that_index = table_info->indexes; |
| build_oid_noalloc(that_oid, MAX_OID_LEN, &that_oid_len, |
| base_oid, 2, that_index); |
| |
| /* |
| * This request has the same index values, |
| * so add the newly-created row information. |
| */ |
| if (snmp_oid_compare(this_oid, this_oid_len, |
| that_oid, that_oid_len) == 0) { |
| netsnmp_request_remove_list_data(req, TABLE_CONTAINER_ROW); |
| } |
| } |
| } |
| #endif /* NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER_ROW_REMOVE */ |
| |
| /** @cond */ |
| /********************************************************************** |
| ********************************************************************** |
| * * |
| * * |
| * DATA LOOKUP functions * |
| * * |
| * * |
| ********************************************************************** |
| **********************************************************************/ |
| NETSNMP_STATIC_INLINE void |
| _set_key( container_table_data * tad, netsnmp_request_info *request, |
| netsnmp_table_request_info *tblreq_info, |
| void **key, netsnmp_index *index ) |
| { |
| if (TABLE_CONTAINER_KEY_NETSNMP_INDEX == tad->key_type) { |
| index->oids = tblreq_info->index_oid; |
| index->len = tblreq_info->index_oid_len; |
| *key = index; |
| } |
| else if (TABLE_CONTAINER_KEY_VARBIND_INDEX == tad->key_type) { |
| *key = tblreq_info->indexes; |
| } |
| #if 0 |
| else if (TABLE_CONTAINER_KEY_VARBIND_RAW == tad->key_type) { |
| *key = request->requestvb; |
| } |
| #endif |
| else |
| *key = NULL; |
| } |
| |
| |
| NETSNMP_STATIC_INLINE void |
| _data_lookup(netsnmp_handler_registration *reginfo, |
| netsnmp_agent_request_info *agtreq_info, |
| netsnmp_request_info *request, container_table_data * tad) |
| { |
| netsnmp_index *row = NULL; |
| netsnmp_table_request_info *tblreq_info; |
| netsnmp_variable_list *var; |
| netsnmp_index index; |
| void *key; |
| |
| var = request->requestvb; |
| |
| DEBUGIF("table_container") { |
| DEBUGMSGTL(("table_container", " data_lookup oid:")); |
| DEBUGMSGOID(("table_container", var->name, var->name_length)); |
| DEBUGMSG(("table_container", "\n")); |
| } |
| |
| /* |
| * Get pointer to the table information for this request. This |
| * information was saved by table_helper_handler. |
| */ |
| tblreq_info = netsnmp_extract_table_info(request); |
| /** the table_helper_handler should enforce column boundaries. */ |
| netsnmp_assert((NULL != tblreq_info) && |
| (tblreq_info->colnum <= tad->tblreg_info->max_column)); |
| |
| if ((agtreq_info->mode == MODE_GETNEXT) || |
| (agtreq_info->mode == MODE_GETBULK)) { |
| /* |
| * find the row. This will automatically move to the next |
| * column, if necessary. |
| */ |
| _set_key( tad, request, tblreq_info, &key, &index ); |
| row = (netsnmp_index*)_find_next_row(tad->table, tblreq_info, key); |
| if (row) { |
| /* |
| * update indexes in tblreq_info (index & varbind), |
| * then update request varbind oid |
| */ |
| if(TABLE_CONTAINER_KEY_NETSNMP_INDEX == tad->key_type) { |
| tblreq_info->index_oid_len = row->len; |
| memcpy(tblreq_info->index_oid, row->oids, |
| row->len * sizeof(oid)); |
| netsnmp_update_variable_list_from_index(tblreq_info); |
| } |
| else if (TABLE_CONTAINER_KEY_VARBIND_INDEX == tad->key_type) { |
| /** xxx-rks: shouldn't tblreq_info->indexes be updated |
| before we call this?? */ |
| netsnmp_update_indexes_from_variable_list(tblreq_info); |
| } |
| |
| if (TABLE_CONTAINER_KEY_VARBIND_RAW != tad->key_type) { |
| netsnmp_table_build_oid_from_index(reginfo, request, |
| tblreq_info); |
| } |
| } |
| else { |
| /* |
| * no results found. Flag the request so lower handlers will |
| * ignore it, but it is not an error - getnext will move |
| * on to another handler to process this request. |
| */ |
| netsnmp_set_request_error(agtreq_info, request, SNMP_ENDOFMIBVIEW); |
| DEBUGMSGTL(("table_container", "no row found\n")); |
| } |
| } /** GETNEXT/GETBULK */ |
| else { |
| |
| _set_key( tad, request, tblreq_info, &key, &index ); |
| row = (netsnmp_index*)CONTAINER_FIND(tad->table, key); |
| if (NULL == row) { |
| /* |
| * not results found. For a get, that is an error |
| */ |
| DEBUGMSGTL(("table_container", "no row found\n")); |
| #ifndef NETSNMP_NO_WRITE_SUPPORT |
| if((agtreq_info->mode != MODE_SET_RESERVE1) || /* get */ |
| (reginfo->modes & HANDLER_CAN_NOT_CREATE)) { /* no create */ |
| #endif /* NETSNMP_NO_WRITE_SUPPORT */ |
| netsnmp_set_request_error(agtreq_info, request, |
| SNMP_NOSUCHINSTANCE); |
| #ifndef NETSNMP_NO_WRITE_SUPPORT |
| } |
| #endif /* NETSNMP_NO_WRITE_SUPPORT */ |
| } |
| } /** GET/SET */ |
| |
| /* |
| * save the data and table in the request. |
| */ |
| if (SNMP_ENDOFMIBVIEW != request->requestvb->type) { |
| if (NULL != row) |
| netsnmp_request_add_list_data(request, |
| netsnmp_create_data_list |
| (TABLE_CONTAINER_ROW, |
| row, NULL)); |
| netsnmp_request_add_list_data(request, |
| netsnmp_create_data_list |
| (TABLE_CONTAINER_CONTAINER, |
| tad->table, NULL)); |
| } |
| } |
| |
| /********************************************************************** |
| ********************************************************************** |
| * * |
| * * |
| * netsnmp_table_container_helper_handler() * |
| * * |
| * * |
| ********************************************************************** |
| **********************************************************************/ |
| static int |
| _container_table_handler(netsnmp_mib_handler *handler, |
| netsnmp_handler_registration *reginfo, |
| netsnmp_agent_request_info *agtreq_info, |
| netsnmp_request_info *requests) |
| { |
| int rc = SNMP_ERR_NOERROR; |
| int oldmode, need_processing = 0; |
| container_table_data *tad; |
| |
| /** sanity checks */ |
| netsnmp_assert((NULL != handler) && (NULL != handler->myvoid)); |
| netsnmp_assert((NULL != reginfo) && (NULL != agtreq_info)); |
| |
| DEBUGMSGTL(("table_container", "Mode %s, Got request:\n", |
| se_find_label_in_slist("agent_mode",agtreq_info->mode))); |
| |
| /* |
| * First off, get our pointer from the handler. This |
| * lets us get to the table registration information we |
| * saved in get_table_container_handler(), as well as the |
| * container where the actual table data is stored. |
| */ |
| tad = (container_table_data *)handler->myvoid; |
| |
| /* |
| * only do data lookup for first pass |
| * |
| * xxx-rks: this should really be handled up one level. we should |
| * be able to say what modes we want to be called for during table |
| * registration. |
| */ |
| oldmode = agtreq_info->mode; |
| if(MODE_IS_GET(oldmode) |
| #ifndef NETSNMP_NO_WRITE_SUPPORT |
| || (MODE_SET_RESERVE1 == oldmode) |
| #endif /* NETSNMP_NO_WRITE_SUPPORT */ |
| ) { |
| netsnmp_request_info *curr_request; |
| /* |
| * Loop through each of the requests, and |
| * try to find the appropriate row from the container. |
| */ |
| for (curr_request = requests; curr_request; curr_request = curr_request->next) { |
| /* |
| * skip anything that doesn't need processing. |
| */ |
| if (curr_request->processed != 0) { |
| DEBUGMSGTL(("table_container", "already processed\n")); |
| continue; |
| } |
| |
| /* |
| * find data for this request |
| */ |
| _data_lookup(reginfo, agtreq_info, curr_request, tad); |
| |
| if(curr_request->processed) |
| continue; |
| |
| ++need_processing; |
| } /** for ( ... requests ... ) */ |
| } |
| |
| /* |
| * send GET instead of GETNEXT to sub-handlers |
| * xxx-rks: again, this should be handled further up. |
| */ |
| if ((oldmode == MODE_GETNEXT) && (handler->next)) { |
| /* |
| * tell agent handlder not to auto call next handler |
| */ |
| handler->flags |= MIB_HANDLER_AUTO_NEXT_OVERRIDE_ONCE; |
| |
| /* |
| * if we found rows to process, pretend to be a get request |
| * and call handler below us. |
| */ |
| if(need_processing > 0) { |
| agtreq_info->mode = MODE_GET; |
| rc = netsnmp_call_next_handler(handler, reginfo, agtreq_info, |
| requests); |
| if (rc != SNMP_ERR_NOERROR) { |
| DEBUGMSGTL(("table_container", |
| "next handler returned %d\n", rc)); |
| } |
| |
| agtreq_info->mode = oldmode; /* restore saved mode */ |
| } |
| } |
| |
| return rc; |
| } |
| /** @endcond */ |
| |
| |
| /* ================================== |
| * |
| * Container Table API: Row operations |
| * |
| * ================================== */ |
| |
| static void * |
| _find_next_row(netsnmp_container *c, |
| netsnmp_table_request_info *tblreq, |
| void * key) |
| { |
| void *row = NULL; |
| |
| if (!c || !tblreq || !tblreq->reg_info ) { |
| snmp_log(LOG_ERR,"_find_next_row param error\n"); |
| return NULL; |
| } |
| |
| /* |
| * table helper should have made sure we aren't below our minimum column |
| */ |
| netsnmp_assert(tblreq->colnum >= tblreq->reg_info->min_column); |
| |
| /* |
| * if no indexes then use first row. |
| */ |
| if(tblreq->number_indexes == 0) { |
| row = CONTAINER_FIRST(c); |
| } else { |
| |
| if(NULL == key) { |
| netsnmp_index index; |
| index.oids = tblreq->index_oid; |
| index.len = tblreq->index_oid_len; |
| row = CONTAINER_NEXT(c, &index); |
| } |
| else |
| row = CONTAINER_NEXT(c, key); |
| |
| /* |
| * we don't have a row, but we might be at the end of a |
| * column, so try the next column. |
| */ |
| if (NULL == row) { |
| /* |
| * don't set tblreq next_col unless we know there is one, |
| * so we don't mess up table handler sparse table processing. |
| */ |
| oid next_col = netsnmp_table_next_column(tblreq); |
| if (0 != next_col) { |
| tblreq->colnum = next_col; |
| row = CONTAINER_FIRST(c); |
| } |
| } |
| } |
| |
| return row; |
| } |
| |
| /** |
| * deprecated, backwards compatability only |
| * |
| * expected impact to remove: none |
| * - used between helpers, shouldn't have been used by end users |
| * |
| * replacement: none |
| * - never should have been a public method in the first place |
| */ |
| netsnmp_index * |
| netsnmp_table_index_find_next_row(netsnmp_container *c, |
| netsnmp_table_request_info *tblreq) |
| { |
| return (netsnmp_index*)_find_next_row(c, tblreq, NULL ); |
| } |
| |
| /* ================================== |
| * |
| * Container Table API: Index operations |
| * |
| * ================================== */ |
| |
| #else /* NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER */ |
| netsnmp_feature_unused(table_container); |
| #endif /* NETSNMP_FEATURE_REMOVE_TABLE_CONTAINER */ |
| /** @} */ |
| |
| |
