/usr/include/net-snmp/agent/cache_handler.h is in libsnmp-dev 5.7.3+dfsg-1.8ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 | /* Portions of this file are subject to the following copyright(s). See
* the Net-SNMP's COPYING file for more details and other copyrights
* that may apply:
*/
/*
* Portions of this file are copyrighted by:
* Copyright (C) 2007 Apple, Inc. All rights reserved.
* Use is subject to license terms specified in the COPYING file
* distributed with the Net-SNMP package.
*/
#ifndef NETSNMP_CACHE_HANDLER_H
#define NETSNMP_CACHE_HANDLER_H
/*
* This caching helper provides a generalised (SNMP-manageable) caching
* mechanism. Individual SNMP table and scalar/scalar group MIB
* implementations can use data caching in a consistent manner, without
* needing to handle the generic caching details themselves.
*/
#include <net-snmp/library/tools.h>
#ifdef __cplusplus
extern "C" {
#endif
#define CACHE_NAME "cache_info"
typedef struct netsnmp_cache_s netsnmp_cache;
typedef int (NetsnmpCacheLoad)(netsnmp_cache *, void*);
typedef void (NetsnmpCacheFree)(netsnmp_cache *, void*);
struct netsnmp_cache_s {
/** Number of handlers whose myvoid member points at this structure. */
int refcnt;
/*
* For operation of the data caches
*/
int flags;
int enabled;
int valid;
char expired;
int timeout; /* Length of time the cache is valid (in s) */
marker_t timestampM; /* When the cache was last loaded */
u_long timer_id; /* periodic timer id */
NetsnmpCacheLoad *load_cache;
NetsnmpCacheFree *free_cache;
/*
* void pointer for the user that created the cache.
* You never know when it might not come in useful ....
*/
void *magic;
/*
* hint from the cache helper. contains the standard
* handler arguments.
*/
netsnmp_handler_args *cache_hint;
/*
* For SNMP-management of the data caches
*/
netsnmp_cache *next, *prev;
oid *rootoid;
int rootoid_len;
};
void netsnmp_cache_reqinfo_insert(netsnmp_cache* cache,
netsnmp_agent_request_info * reqinfo,
const char *name);
netsnmp_cache *
netsnmp_cache_reqinfo_extract(netsnmp_agent_request_info * reqinfo,
const char *name);
netsnmp_cache* netsnmp_extract_cache_info(netsnmp_agent_request_info *);
int netsnmp_cache_check_and_reload(netsnmp_cache * cache);
int netsnmp_cache_check_expired(netsnmp_cache *cache);
int netsnmp_cache_is_valid( netsnmp_agent_request_info *,
const char *name);
/** for backwards compat */
int netsnmp_is_cache_valid( netsnmp_agent_request_info *);
netsnmp_mib_handler *netsnmp_get_cache_handler(int, NetsnmpCacheLoad *,
NetsnmpCacheFree *,
const oid*, int);
int netsnmp_register_cache_handler(netsnmp_handler_registration *reginfo,
int, NetsnmpCacheLoad *,
NetsnmpCacheFree *);
Netsnmp_Node_Handler netsnmp_cache_helper_handler;
netsnmp_cache *
netsnmp_cache_create(int timeout, NetsnmpCacheLoad * load_hook,
NetsnmpCacheFree * free_hook,
const oid * rootoid, int rootoid_len);
int netsnmp_cache_remove(netsnmp_cache *cache);
int netsnmp_cache_free(netsnmp_cache *cache);
netsnmp_mib_handler *
netsnmp_cache_handler_get(netsnmp_cache* cache);
void netsnmp_cache_handler_owns_cache(netsnmp_mib_handler *handler);
netsnmp_cache * netsnmp_cache_find_by_oid(const oid * rootoid,
int rootoid_len);
unsigned int netsnmp_cache_timer_start(netsnmp_cache *cache);
void netsnmp_cache_timer_stop(netsnmp_cache *cache);
/*
* Flags affecting cache handler operation
*/
#define NETSNMP_CACHE_DONT_INVALIDATE_ON_SET 0x0001
#define NETSNMP_CACHE_DONT_FREE_BEFORE_LOAD 0x0002
#define NETSNMP_CACHE_DONT_FREE_EXPIRED 0x0004
#define NETSNMP_CACHE_DONT_AUTO_RELEASE 0x0008
#define NETSNMP_CACHE_PRELOAD 0x0010
#define NETSNMP_CACHE_AUTO_RELOAD 0x0020
#define NETSNMP_CACHE_RESET_TIMER_ON_USE 0x0040
#define NETSNMP_CACHE_HINT_HANDLER_ARGS 0x1000
#ifdef __cplusplus
}
#endif
#endif /* NETSNMP_CACHE_HANDLER_H */
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