| #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> |
| |
| netsnmp_feature_provide(stash_to_next) |
| netsnmp_feature_child_of(stash_to_next, mib_helpers) |
| |
| #ifdef NETSNMP_FEATURE_REQUIRE_STASH_TO_NEXT |
| netsnmp_feature_require(oid_stash) |
| netsnmp_feature_require(oid_stash_add_data) |
| #endif |
| |
| #ifndef NETSNMP_FEATURE_REMOVE_STASH_TO_NEXT |
| #include <net-snmp/agent/stash_to_next.h> |
| |
| #include <net-snmp/agent/stash_cache.h> |
| |
| /** @defgroup stash_to_next stash_to_next |
| * Convert GET_STASH requests into GETNEXT requests for the handler. |
| * The purpose of this handler is to convert a GET_STASH auto-cache request |
| * to a series of GETNEXT requests. It can be inserted into a handler chain |
| * where the lower-level handlers don't process such requests themselves. |
| * @ingroup utilities |
| * @{ |
| */ |
| |
| /** returns a stash_to_next handler that can be injected into a given |
| * handler chain. |
| */ |
| netsnmp_mib_handler * |
| netsnmp_get_stash_to_next_handler(void) |
| { |
| netsnmp_mib_handler *handler = |
| netsnmp_create_handler("stash_to_next", |
| netsnmp_stash_to_next_helper); |
| |
| if (NULL != handler) |
| handler->flags |= MIB_HANDLER_AUTO_NEXT; |
| |
| return handler; |
| } |
| |
| /** @internal Implements the stash_to_next handler */ |
| int |
| netsnmp_stash_to_next_helper(netsnmp_mib_handler *handler, |
| netsnmp_handler_registration *reginfo, |
| netsnmp_agent_request_info *reqinfo, |
| netsnmp_request_info *requests) |
| { |
| |
| int ret = SNMP_ERR_NOERROR; |
| int namelen; |
| int finished = 0; |
| netsnmp_oid_stash_node **cinfo; |
| netsnmp_variable_list *vb; |
| netsnmp_request_info *reqtmp; |
| |
| /* |
| * this code depends on AUTO_NEXT being set |
| */ |
| netsnmp_assert(handler->flags & MIB_HANDLER_AUTO_NEXT); |
| |
| /* |
| * Don't do anything for any modes except GET_STASH. Just return, |
| * and the agent will call the next handler (AUTO_NEXT). |
| * |
| * If the handler chain already supports GET_STASH, we don't |
| * need to do anything here either. Once again, we just return |
| * and the agent will call the next handler (AUTO_NEXT). |
| * |
| * Otherwise, we munge the mode to GET_NEXT, and call the |
| * next handler ourselves, repeatedly until we've retrieved the |
| * full contents of the table or subtree. |
| * Then restore the mode and return to the calling handler |
| * (setting AUTO_NEXT_OVERRRIDE so the agent knows what we did). |
| */ |
| if (MODE_GET_STASH == reqinfo->mode) { |
| if ( reginfo->modes & HANDLER_CAN_STASH ) { |
| return ret; |
| } |
| cinfo = netsnmp_extract_stash_cache( reqinfo ); |
| reqtmp = SNMP_MALLOC_TYPEDEF(netsnmp_request_info); |
| vb = reqtmp->requestvb = SNMP_MALLOC_TYPEDEF( netsnmp_variable_list ); |
| vb->type = ASN_NULL; |
| snmp_set_var_objid( vb, reginfo->rootoid, reginfo->rootoid_len ); |
| |
| reqinfo->mode = MODE_GETNEXT; |
| while (!finished) { |
| ret = netsnmp_call_next_handler(handler, reginfo, reqinfo, reqtmp); |
| namelen = SNMP_MIN(vb->name_length, reginfo->rootoid_len); |
| if ( !snmp_oid_compare( reginfo->rootoid, reginfo->rootoid_len, |
| vb->name, namelen) && |
| vb->type != ASN_NULL && vb->type != SNMP_ENDOFMIBVIEW ) { |
| /* |
| * This result is relevant so save it, and prepare |
| * the request varbind for the next query. |
| */ |
| netsnmp_oid_stash_add_data( cinfo, vb->name, vb->name_length, |
| snmp_clone_varbind( vb )); |
| /* |
| * Tidy up the response structure, |
| * ready for retrieving the next entry |
| */ |
| netsnmp_free_all_list_data(reqtmp->parent_data); |
| reqtmp->parent_data = NULL; |
| reqtmp->processed = 0; |
| vb->type = ASN_NULL; |
| } else { |
| finished = 1; |
| } |
| } |
| reqinfo->mode = MODE_GET_STASH; |
| |
| /* |
| * let the handler chain processing know that we've already |
| * called the next handler |
| */ |
| handler->flags |= MIB_HANDLER_AUTO_NEXT_OVERRIDE_ONCE; |
| } |
| |
| return ret; |
| } |
| /** @} */ |
| |
| #else /* ! NETSNMP_FEATURE_REMOVE_STASH_TO_NEXT */ |
| netsnmp_feature_unused(stash_to_next); |
| #endif /* ! NETSNMP_FEATURE_REMOVE_STASH_TO_NEXT */ |