FreeRTOS/Common/ethernet/lwIP_130/src/include/lwip/snmp_structs.h

   1 /**
   2  * @file
   3  * Generic MIB tree structures.
   4  *
   5  * @todo namespace prefixes
   6  */
   7
   8 /*
   9  * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
  10  * All rights reserved.
  11  *
  12  * Redistribution and use in source and binary forms, with or without modification,
  13  * are permitted provided that the following conditions are met:
  14  *
  15  * 1. Redistributions of source code must retain the above copyright notice,
  16  *    this list of conditions and the following disclaimer.
  17  * 2. Redistributions in binary form must reproduce the above copyright notice,
  18  *    this list of conditions and the following disclaimer in the documentation
  19  *    and/or other materials provided with the distribution.
  20  * 3. The name of the author may not be used to endorse or promote products
  21  *    derived from this software without specific prior written permission.
  22  *
  23  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
  24  * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
  25  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  26  * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  27  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
  28  * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  31  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
  32  * OF SUCH DAMAGE.
  33  *
  34  * Author: Christiaan Simons <christiaan.simons@axon.tv>
  35  */
  36
  37 #ifndef __LWIP_SNMP_STRUCTS_H__
  38 #define __LWIP_SNMP_STRUCTS_H__
  39
  40 #include "lwip/opt.h"
  41
  42 #if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
  43
  44 #include "lwip/snmp.h"
  45
  46 #if SNMP_PRIVATE_MIB
  47 #include "private_mib.h"
  48 #endif
  49
  50 #ifdef __cplusplus
  51 extern "C" {
  52 #endif
  53
  54 /* MIB object instance */
  55 #define MIB_OBJECT_NONE 0
  56 #define MIB_OBJECT_SCALAR 1
  57 #define MIB_OBJECT_TAB 2
  58
  59 /* MIB object access */
  60 #define MIB_OBJECT_READ_ONLY 0
  61 #define MIB_OBJECT_READ_WRITE 1
  62 #define MIB_OBJECT_WRITE_ONLY 2
  63 #define MIB_OBJECT_NOT_ACCESSIBLE 3
  64
  65 /** object definition returned by (get_object_def)() */
  66 struct obj_def
  67 {
  68   /* MIB_OBJECT_NONE (0), MIB_OBJECT_SCALAR (1), MIB_OBJECT_TAB (2) */
  69   u8_t instance;
  70   /* 0 read-only, 1 read-write, 2 write-only, 3 not-accessible */
  71   u8_t access;
  72   /* ASN type for this object */
  73   u8_t asn_type;
  74   /* value length (host length) */
  75   u16_t v_len;
  76   /* length of instance part of supplied object identifier */
  77   u8_t  id_inst_len;
  78   /* instance part of supplied object identifier */
  79   s32_t *id_inst_ptr;
  80 };
  81
  82 struct snmp_name_ptr
  83 {
  84   u8_t ident_len;
  85   s32_t *ident;
  86 };
  87
  88 /** MIB const scalar (.0) node */
  89 #define MIB_NODE_SC 0x01
  90 /** MIB const array node */
  91 #define MIB_NODE_AR 0x02
  92 /** MIB array node (mem_malloced from RAM) */
  93 #define MIB_NODE_RA 0x03
  94 /** MIB list root node (mem_malloced from RAM) */
  95 #define MIB_NODE_LR 0x04
  96 /** MIB node for external objects */
  97 #define MIB_NODE_EX 0x05
  98
  99 /** node "base class" layout, the mandatory fields for a node  */
 100 struct mib_node
 101 {
 102   /** returns struct obj_def for the given object identifier */
 103   void (*get_object_def)(u8_t ident_len, s32_t *ident, struct obj_def *od);
 104   /** returns object value for the given object identifier,
 105      @note the caller must allocate at least len bytes for the value */
 106   void (*get_value)(struct obj_def *od, u16_t len, void *value);
 107   /** tests length and/or range BEFORE setting */
 108   u8_t (*set_test)(struct obj_def *od, u16_t len, void *value);
 109   /** sets object value, only to be called when set_test()  */
 110   void (*set_value)(struct obj_def *od, u16_t len, void *value);
 111   /** One out of MIB_NODE_AR, MIB_NODE_LR or MIB_NODE_EX */
 112   const u8_t node_type;
 113   /* array or max list length */
 114   const u16_t maxlength;
 115 };
 116
 117 /** derived node for scalars .0 index */
 118 typedef struct mib_node mib_scalar_node;
 119
 120 /** derived node, points to a fixed size const array
 121     of sub-identifiers plus a 'child' pointer */
 122 struct mib_array_node
 123 {
 124   /* inherited "base class" members */
 125   void (* const get_object_def)(u8_t ident_len, s32_t *ident, struct obj_def *od);
 126   void (* const get_value)(struct obj_def *od, u16_t len, void *value);
 127   u8_t (*set_test)(struct obj_def *od, u16_t len, void *value);
 128   void (*set_value)(struct obj_def *od, u16_t len, void *value);
 129
 130   const u8_t node_type;
 131   const u16_t maxlength;
 132
 133   /* aditional struct members */
 134   const s32_t *objid;
 135   struct mib_node* const *nptr;
 136 };
 137
 138 /** derived node, points to a fixed size mem_malloced array
 139     of sub-identifiers plus a 'child' pointer */
 140 struct mib_ram_array_node
 141 {
 142   /* inherited "base class" members */
 143   void (*get_object_def)(u8_t ident_len, s32_t *ident, struct obj_def *od);
 144   void (*get_value)(struct obj_def *od, u16_t len, void *value);
 145   u8_t (*set_test)(struct obj_def *od, u16_t len, void *value);
 146   void (*set_value)(struct obj_def *od, u16_t len, void *value);
 147
 148   u8_t node_type;
 149   u16_t maxlength;
 150
 151   /* aditional struct members */
 152   s32_t *objid;
 153   struct mib_node **nptr;
 154 };
 155
 156 struct mib_list_node
 157 {
 158   struct mib_list_node *prev;
 159   struct mib_list_node *next;
 160   s32_t objid;
 161   struct mib_node *nptr;
 162 };
 163
 164 /** derived node, points to a doubly linked list
 165     of sub-identifiers plus a 'child' pointer */
 166 struct mib_list_rootnode
 167 {
 168   /* inherited "base class" members */
 169   void (*get_object_def)(u8_t ident_len, s32_t *ident, struct obj_def *od);
 170   void (*get_value)(struct obj_def *od, u16_t len, void *value);
 171   u8_t (*set_test)(struct obj_def *od, u16_t len, void *value);
 172   void (*set_value)(struct obj_def *od, u16_t len, void *value);
 173
 174   u8_t node_type;
 175   u16_t maxlength;
 176
 177   /* aditional struct members */
 178   struct mib_list_node *head;
 179   struct mib_list_node *tail;
 180   /* counts list nodes in list  */
 181   u16_t count;
 182 };
 183
 184 /** derived node, has access functions for mib object in external memory or device
 185     using 'tree_level' and 'idx', with a range 0 .. (level_length() - 1) */
 186 struct mib_external_node
 187 {
 188   /* inherited "base class" members */
 189   void (*get_object_def)(u8_t ident_len, s32_t *ident, struct obj_def *od);
 190   void (*get_value)(struct obj_def *od, u16_t len, void *value);
 191   u8_t (*set_test)(struct obj_def *od, u16_t len, void *value);
 192   void (*set_value)(struct obj_def *od, u16_t len, void *value);
 193
 194   u8_t node_type;
 195   u16_t maxlength;
 196
 197   /* aditional struct members */
 198   /** points to an extenal (in memory) record of some sort of addressing
 199       information, passed to and interpreted by the funtions below */
 200   void* addr_inf;
 201   /** tree levels under this node */
 202   u8_t tree_levels;
 203   /** number of objects at this level */
 204   u16_t (*level_length)(void* addr_inf, u8_t level);
 205   /** compares object sub identifier with external id
 206       return zero when equal, nonzero when unequal */
 207   s32_t (*ident_cmp)(void* addr_inf, u8_t level, u16_t idx, s32_t sub_id);
 208   void (*get_objid)(void* addr_inf, u8_t level, u16_t idx, s32_t *sub_id);
 209
 210   /** async Questions */
 211   void (*get_object_def_q)(void* addr_inf, u8_t rid, u8_t ident_len, s32_t *ident);
 212   void (*get_value_q)(u8_t rid, struct obj_def *od);
 213   void (*set_test_q)(u8_t rid, struct obj_def *od);
 214   void (*set_value_q)(u8_t rid, struct obj_def *od, u16_t len, void *value);
 215   /** async Answers */
 216   void (*get_object_def_a)(u8_t rid, u8_t ident_len, s32_t *ident, struct obj_def *od);
 217   void (*get_value_a)(u8_t rid, struct obj_def *od, u16_t len, void *value);
 218   u8_t (*set_test_a)(u8_t rid, struct obj_def *od, u16_t len, void *value);
 219   void (*set_value_a)(u8_t rid, struct obj_def *od, u16_t len, void *value);
 220   /** async Panic Close (agent returns error reply,
 221       e.g. used for external transaction cleanup) */
 222   void (*get_object_def_pc)(u8_t rid, u8_t ident_len, s32_t *ident);
 223   void (*get_value_pc)(u8_t rid, struct obj_def *od);
 224   void (*set_test_pc)(u8_t rid, struct obj_def *od);
 225   void (*set_value_pc)(u8_t rid, struct obj_def *od);
 226 };
 227
 228 /** export MIB tree from mib2.c */
 229 extern const struct mib_array_node internet;
 230
 231 /** dummy function pointers for non-leaf MIB nodes from mib2.c */
 232 void noleafs_get_object_def(u8_t ident_len, s32_t *ident, struct obj_def *od);
 233 void noleafs_get_value(struct obj_def *od, u16_t len, void *value);
 234 u8_t noleafs_set_test(struct obj_def *od, u16_t len, void *value);
 235 void noleafs_set_value(struct obj_def *od, u16_t len, void *value);
 236
 237 void snmp_oidtoip(s32_t *ident, struct ip_addr *ip);
 238 void snmp_iptooid(struct ip_addr *ip, s32_t *ident);
 239 void snmp_ifindextonetif(s32_t ifindex, struct netif **netif);
 240 void snmp_netiftoifindex(struct netif *netif, s32_t *ifidx);
 241
 242 struct mib_list_node* snmp_mib_ln_alloc(s32_t id);
 243 void snmp_mib_ln_free(struct mib_list_node *ln);
 244 struct mib_list_rootnode* snmp_mib_lrn_alloc(void);
 245 void snmp_mib_lrn_free(struct mib_list_rootnode *lrn);
 246
 247 s8_t snmp_mib_node_insert(struct mib_list_rootnode *rn, s32_t objid, struct mib_list_node **insn);
 248 s8_t snmp_mib_node_find(struct mib_list_rootnode *rn, s32_t objid, struct mib_list_node **fn);
 249 struct mib_list_rootnode *snmp_mib_node_delete(struct mib_list_rootnode *rn, struct mib_list_node *n);
 250
 251 struct mib_node* snmp_search_tree(struct mib_node *node, u8_t ident_len, s32_t *ident, struct snmp_name_ptr *np);
 252 struct mib_node* snmp_expand_tree(struct mib_node *node, u8_t ident_len, s32_t *ident, struct snmp_obj_id *oidret);
 253 u8_t snmp_iso_prefix_tst(u8_t ident_len, s32_t *ident);
 254 u8_t snmp_iso_prefix_expand(u8_t ident_len, s32_t *ident, struct snmp_obj_id *oidret);
 255
 256 #ifdef __cplusplus
 257 }
 258 #endif
 259
 260 #endif /* LWIP_SNMP */
 261
 262 #endif /* __LWIP_SNMP_STRUCTS_H__ */