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lwip/core/snmp/mib_structs.c@0:d7bd7384a37c, 2016-12-07 (annotated)

Committer:
grzemich
Date:
Wed Dec 07 23:47:50 2016 +0000
Revision:
0:d7bd7384a37c
dgd

Who changed what in which revision?

UserRevisionLine numberNew contents of line
grzemich 0:d7bd7384a37c 1 /**
grzemich 0:d7bd7384a37c 2 * @file
grzemich 0:d7bd7384a37c 3 * MIB tree access/construction functions.
grzemich 0:d7bd7384a37c 4 */
grzemich 0:d7bd7384a37c 5
grzemich 0:d7bd7384a37c 6 /*
grzemich 0:d7bd7384a37c 7 * Copyright (c) 2006 Axon Digital Design B.V., The Netherlands.
grzemich 0:d7bd7384a37c 8 * All rights reserved.
grzemich 0:d7bd7384a37c 9 *
grzemich 0:d7bd7384a37c 10 * Redistribution and use in source and binary forms, with or without modification,
grzemich 0:d7bd7384a37c 11 * are permitted provided that the following conditions are met:
grzemich 0:d7bd7384a37c 12 *
grzemich 0:d7bd7384a37c 13 * 1. Redistributions of source code must retain the above copyright notice,
grzemich 0:d7bd7384a37c 14 * this list of conditions and the following disclaimer.
grzemich 0:d7bd7384a37c 15 * 2. Redistributions in binary form must reproduce the above copyright notice,
grzemich 0:d7bd7384a37c 16 * this list of conditions and the following disclaimer in the documentation
grzemich 0:d7bd7384a37c 17 * and/or other materials provided with the distribution.
grzemich 0:d7bd7384a37c 18 * 3. The name of the author may not be used to endorse or promote products
grzemich 0:d7bd7384a37c 19 * derived from this software without specific prior written permission.
grzemich 0:d7bd7384a37c 20 *
grzemich 0:d7bd7384a37c 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
grzemich 0:d7bd7384a37c 22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
grzemich 0:d7bd7384a37c 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
grzemich 0:d7bd7384a37c 24 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
grzemich 0:d7bd7384a37c 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
grzemich 0:d7bd7384a37c 26 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
grzemich 0:d7bd7384a37c 27 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
grzemich 0:d7bd7384a37c 28 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
grzemich 0:d7bd7384a37c 29 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
grzemich 0:d7bd7384a37c 30 * OF SUCH DAMAGE.
grzemich 0:d7bd7384a37c 31 *
grzemich 0:d7bd7384a37c 32 * Author: Christiaan Simons <christiaan.simons@axon.tv>
grzemich 0:d7bd7384a37c 33 */
grzemich 0:d7bd7384a37c 34
grzemich 0:d7bd7384a37c 35 #include "lwip/opt.h"
grzemich 0:d7bd7384a37c 36
grzemich 0:d7bd7384a37c 37 #if LWIP_SNMP /* don't build if not configured for use in lwipopts.h */
grzemich 0:d7bd7384a37c 38
grzemich 0:d7bd7384a37c 39 #include "lwip/snmp_structs.h"
grzemich 0:d7bd7384a37c 40 #include "lwip/memp.h"
grzemich 0:d7bd7384a37c 41 #include "lwip/netif.h"
grzemich 0:d7bd7384a37c 42
grzemich 0:d7bd7384a37c 43 /** .iso.org.dod.internet address prefix, @see snmp_iso_*() */
grzemich 0:d7bd7384a37c 44 const s32_t prefix[4] = {1, 3, 6, 1};
grzemich 0:d7bd7384a37c 45
grzemich 0:d7bd7384a37c 46 #define NODE_STACK_SIZE (LWIP_SNMP_OBJ_ID_LEN)
grzemich 0:d7bd7384a37c 47 /** node stack entry (old news?) */
grzemich 0:d7bd7384a37c 48 struct nse
grzemich 0:d7bd7384a37c 49 {
grzemich 0:d7bd7384a37c 50 /** right child */
grzemich 0:d7bd7384a37c 51 struct mib_node* r_ptr;
grzemich 0:d7bd7384a37c 52 /** right child identifier */
grzemich 0:d7bd7384a37c 53 s32_t r_id;
grzemich 0:d7bd7384a37c 54 /** right child next level */
grzemich 0:d7bd7384a37c 55 u8_t r_nl;
grzemich 0:d7bd7384a37c 56 };
grzemich 0:d7bd7384a37c 57 static u8_t node_stack_cnt;
grzemich 0:d7bd7384a37c 58 static struct nse node_stack[NODE_STACK_SIZE];
grzemich 0:d7bd7384a37c 59
grzemich 0:d7bd7384a37c 60 /**
grzemich 0:d7bd7384a37c 61 * Pushes nse struct onto stack.
grzemich 0:d7bd7384a37c 62 */
grzemich 0:d7bd7384a37c 63 static void
grzemich 0:d7bd7384a37c 64 push_node(struct nse* node)
grzemich 0:d7bd7384a37c 65 {
grzemich 0:d7bd7384a37c 66 LWIP_ASSERT("node_stack_cnt < NODE_STACK_SIZE",node_stack_cnt < NODE_STACK_SIZE);
grzemich 0:d7bd7384a37c 67 LWIP_DEBUGF(SNMP_MIB_DEBUG,("push_node() node=%p id=%"S32_F"\n",(void*)(node->r_ptr),node->r_id));
grzemich 0:d7bd7384a37c 68 if (node_stack_cnt < NODE_STACK_SIZE)
grzemich 0:d7bd7384a37c 69 {
grzemich 0:d7bd7384a37c 70 node_stack[node_stack_cnt] = *node;
grzemich 0:d7bd7384a37c 71 node_stack_cnt++;
grzemich 0:d7bd7384a37c 72 }
grzemich 0:d7bd7384a37c 73 }
grzemich 0:d7bd7384a37c 74
grzemich 0:d7bd7384a37c 75 /**
grzemich 0:d7bd7384a37c 76 * Pops nse struct from stack.
grzemich 0:d7bd7384a37c 77 */
grzemich 0:d7bd7384a37c 78 static void
grzemich 0:d7bd7384a37c 79 pop_node(struct nse* node)
grzemich 0:d7bd7384a37c 80 {
grzemich 0:d7bd7384a37c 81 if (node_stack_cnt > 0)
grzemich 0:d7bd7384a37c 82 {
grzemich 0:d7bd7384a37c 83 node_stack_cnt--;
grzemich 0:d7bd7384a37c 84 *node = node_stack[node_stack_cnt];
grzemich 0:d7bd7384a37c 85 }
grzemich 0:d7bd7384a37c 86 LWIP_DEBUGF(SNMP_MIB_DEBUG,("pop_node() node=%p id=%"S32_F"\n",(void *)(node->r_ptr),node->r_id));
grzemich 0:d7bd7384a37c 87 }
grzemich 0:d7bd7384a37c 88
grzemich 0:d7bd7384a37c 89 /**
grzemich 0:d7bd7384a37c 90 * Conversion from ifIndex to lwIP netif
grzemich 0:d7bd7384a37c 91 * @param ifindex is a s32_t object sub-identifier
grzemich 0:d7bd7384a37c 92 * @param netif points to returned netif struct pointer
grzemich 0:d7bd7384a37c 93 */
grzemich 0:d7bd7384a37c 94 void
grzemich 0:d7bd7384a37c 95 snmp_ifindextonetif(s32_t ifindex, struct netif **netif)
grzemich 0:d7bd7384a37c 96 {
grzemich 0:d7bd7384a37c 97 struct netif *nif = netif_list;
grzemich 0:d7bd7384a37c 98 s32_t i, ifidx;
grzemich 0:d7bd7384a37c 99
grzemich 0:d7bd7384a37c 100 ifidx = ifindex - 1;
grzemich 0:d7bd7384a37c 101 i = 0;
grzemich 0:d7bd7384a37c 102 while ((nif != NULL) && (i < ifidx))
grzemich 0:d7bd7384a37c 103 {
grzemich 0:d7bd7384a37c 104 nif = nif->next;
grzemich 0:d7bd7384a37c 105 i++;
grzemich 0:d7bd7384a37c 106 }
grzemich 0:d7bd7384a37c 107 *netif = nif;
grzemich 0:d7bd7384a37c 108 }
grzemich 0:d7bd7384a37c 109
grzemich 0:d7bd7384a37c 110 /**
grzemich 0:d7bd7384a37c 111 * Conversion from lwIP netif to ifIndex
grzemich 0:d7bd7384a37c 112 * @param netif points to a netif struct
grzemich 0:d7bd7384a37c 113 * @param ifidx points to s32_t object sub-identifier
grzemich 0:d7bd7384a37c 114 */
grzemich 0:d7bd7384a37c 115 void
grzemich 0:d7bd7384a37c 116 snmp_netiftoifindex(struct netif *netif, s32_t *ifidx)
grzemich 0:d7bd7384a37c 117 {
grzemich 0:d7bd7384a37c 118 struct netif *nif = netif_list;
grzemich 0:d7bd7384a37c 119 u16_t i;
grzemich 0:d7bd7384a37c 120
grzemich 0:d7bd7384a37c 121 i = 0;
grzemich 0:d7bd7384a37c 122 while ((nif != NULL) && (nif != netif))
grzemich 0:d7bd7384a37c 123 {
grzemich 0:d7bd7384a37c 124 nif = nif->next;
grzemich 0:d7bd7384a37c 125 i++;
grzemich 0:d7bd7384a37c 126 }
grzemich 0:d7bd7384a37c 127 *ifidx = i+1;
grzemich 0:d7bd7384a37c 128 }
grzemich 0:d7bd7384a37c 129
grzemich 0:d7bd7384a37c 130 /**
grzemich 0:d7bd7384a37c 131 * Conversion from oid to lwIP ip_addr
grzemich 0:d7bd7384a37c 132 * @param ident points to s32_t ident[4] input
grzemich 0:d7bd7384a37c 133 * @param ip points to output struct
grzemich 0:d7bd7384a37c 134 */
grzemich 0:d7bd7384a37c 135 void
grzemich 0:d7bd7384a37c 136 snmp_oidtoip(s32_t *ident, ip_addr_t *ip)
grzemich 0:d7bd7384a37c 137 {
grzemich 0:d7bd7384a37c 138 IP4_ADDR(ip, ident[0], ident[1], ident[2], ident[3]);
grzemich 0:d7bd7384a37c 139 }
grzemich 0:d7bd7384a37c 140
grzemich 0:d7bd7384a37c 141 /**
grzemich 0:d7bd7384a37c 142 * Conversion from lwIP ip_addr to oid
grzemich 0:d7bd7384a37c 143 * @param ip points to input struct
grzemich 0:d7bd7384a37c 144 * @param ident points to s32_t ident[4] output
grzemich 0:d7bd7384a37c 145 */
grzemich 0:d7bd7384a37c 146 void
grzemich 0:d7bd7384a37c 147 snmp_iptooid(ip_addr_t *ip, s32_t *ident)
grzemich 0:d7bd7384a37c 148 {
grzemich 0:d7bd7384a37c 149 ident[0] = ip4_addr1(ip);
grzemich 0:d7bd7384a37c 150 ident[1] = ip4_addr2(ip);
grzemich 0:d7bd7384a37c 151 ident[2] = ip4_addr3(ip);
grzemich 0:d7bd7384a37c 152 ident[3] = ip4_addr4(ip);
grzemich 0:d7bd7384a37c 153 }
grzemich 0:d7bd7384a37c 154
grzemich 0:d7bd7384a37c 155 struct mib_list_node *
grzemich 0:d7bd7384a37c 156 snmp_mib_ln_alloc(s32_t id)
grzemich 0:d7bd7384a37c 157 {
grzemich 0:d7bd7384a37c 158 struct mib_list_node *ln;
grzemich 0:d7bd7384a37c 159
grzemich 0:d7bd7384a37c 160 ln = (struct mib_list_node *)memp_malloc(MEMP_SNMP_NODE);
grzemich 0:d7bd7384a37c 161 if (ln != NULL)
grzemich 0:d7bd7384a37c 162 {
grzemich 0:d7bd7384a37c 163 ln->prev = NULL;
grzemich 0:d7bd7384a37c 164 ln->next = NULL;
grzemich 0:d7bd7384a37c 165 ln->objid = id;
grzemich 0:d7bd7384a37c 166 ln->nptr = NULL;
grzemich 0:d7bd7384a37c 167 }
grzemich 0:d7bd7384a37c 168 return ln;
grzemich 0:d7bd7384a37c 169 }
grzemich 0:d7bd7384a37c 170
grzemich 0:d7bd7384a37c 171 void
grzemich 0:d7bd7384a37c 172 snmp_mib_ln_free(struct mib_list_node *ln)
grzemich 0:d7bd7384a37c 173 {
grzemich 0:d7bd7384a37c 174 memp_free(MEMP_SNMP_NODE, ln);
grzemich 0:d7bd7384a37c 175 }
grzemich 0:d7bd7384a37c 176
grzemich 0:d7bd7384a37c 177 struct mib_list_rootnode *
grzemich 0:d7bd7384a37c 178 snmp_mib_lrn_alloc(void)
grzemich 0:d7bd7384a37c 179 {
grzemich 0:d7bd7384a37c 180 struct mib_list_rootnode *lrn;
grzemich 0:d7bd7384a37c 181
grzemich 0:d7bd7384a37c 182 lrn = (struct mib_list_rootnode*)memp_malloc(MEMP_SNMP_ROOTNODE);
grzemich 0:d7bd7384a37c 183 if (lrn != NULL)
grzemich 0:d7bd7384a37c 184 {
grzemich 0:d7bd7384a37c 185 lrn->get_object_def = noleafs_get_object_def;
grzemich 0:d7bd7384a37c 186 lrn->get_value = noleafs_get_value;
grzemich 0:d7bd7384a37c 187 lrn->set_test = noleafs_set_test;
grzemich 0:d7bd7384a37c 188 lrn->set_value = noleafs_set_value;
grzemich 0:d7bd7384a37c 189 lrn->node_type = MIB_NODE_LR;
grzemich 0:d7bd7384a37c 190 lrn->maxlength = 0;
grzemich 0:d7bd7384a37c 191 lrn->head = NULL;
grzemich 0:d7bd7384a37c 192 lrn->tail = NULL;
grzemich 0:d7bd7384a37c 193 lrn->count = 0;
grzemich 0:d7bd7384a37c 194 }
grzemich 0:d7bd7384a37c 195 return lrn;
grzemich 0:d7bd7384a37c 196 }
grzemich 0:d7bd7384a37c 197
grzemich 0:d7bd7384a37c 198 void
grzemich 0:d7bd7384a37c 199 snmp_mib_lrn_free(struct mib_list_rootnode *lrn)
grzemich 0:d7bd7384a37c 200 {
grzemich 0:d7bd7384a37c 201 memp_free(MEMP_SNMP_ROOTNODE, lrn);
grzemich 0:d7bd7384a37c 202 }
grzemich 0:d7bd7384a37c 203
grzemich 0:d7bd7384a37c 204 /**
grzemich 0:d7bd7384a37c 205 * Inserts node in idx list in a sorted
grzemich 0:d7bd7384a37c 206 * (ascending order) fashion and
grzemich 0:d7bd7384a37c 207 * allocates the node if needed.
grzemich 0:d7bd7384a37c 208 *
grzemich 0:d7bd7384a37c 209 * @param rn points to the root node
grzemich 0:d7bd7384a37c 210 * @param objid is the object sub identifier
grzemich 0:d7bd7384a37c 211 * @param insn points to a pointer to the inserted node
grzemich 0:d7bd7384a37c 212 * used for constructing the tree.
grzemich 0:d7bd7384a37c 213 * @return -1 if failed, 1 if inserted, 2 if present.
grzemich 0:d7bd7384a37c 214 */
grzemich 0:d7bd7384a37c 215 s8_t
grzemich 0:d7bd7384a37c 216 snmp_mib_node_insert(struct mib_list_rootnode *rn, s32_t objid, struct mib_list_node **insn)
grzemich 0:d7bd7384a37c 217 {
grzemich 0:d7bd7384a37c 218 struct mib_list_node *nn;
grzemich 0:d7bd7384a37c 219 s8_t insert;
grzemich 0:d7bd7384a37c 220
grzemich 0:d7bd7384a37c 221 LWIP_ASSERT("rn != NULL",rn != NULL);
grzemich 0:d7bd7384a37c 222
grzemich 0:d7bd7384a37c 223 /* -1 = malloc failure, 0 = not inserted, 1 = inserted, 2 = was present */
grzemich 0:d7bd7384a37c 224 insert = 0;
grzemich 0:d7bd7384a37c 225 if (rn->head == NULL)
grzemich 0:d7bd7384a37c 226 {
grzemich 0:d7bd7384a37c 227 /* empty list, add first node */
grzemich 0:d7bd7384a37c 228 LWIP_DEBUGF(SNMP_MIB_DEBUG,("alloc empty list objid==%"S32_F"\n",objid));
grzemich 0:d7bd7384a37c 229 nn = snmp_mib_ln_alloc(objid);
grzemich 0:d7bd7384a37c 230 if (nn != NULL)
grzemich 0:d7bd7384a37c 231 {
grzemich 0:d7bd7384a37c 232 rn->head = nn;
grzemich 0:d7bd7384a37c 233 rn->tail = nn;
grzemich 0:d7bd7384a37c 234 *insn = nn;
grzemich 0:d7bd7384a37c 235 insert = 1;
grzemich 0:d7bd7384a37c 236 }
grzemich 0:d7bd7384a37c 237 else
grzemich 0:d7bd7384a37c 238 {
grzemich 0:d7bd7384a37c 239 insert = -1;
grzemich 0:d7bd7384a37c 240 }
grzemich 0:d7bd7384a37c 241 }
grzemich 0:d7bd7384a37c 242 else
grzemich 0:d7bd7384a37c 243 {
grzemich 0:d7bd7384a37c 244 struct mib_list_node *n;
grzemich 0:d7bd7384a37c 245 /* at least one node is present */
grzemich 0:d7bd7384a37c 246 n = rn->head;
grzemich 0:d7bd7384a37c 247 while ((n != NULL) && (insert == 0))
grzemich 0:d7bd7384a37c 248 {
grzemich 0:d7bd7384a37c 249 if (n->objid == objid)
grzemich 0:d7bd7384a37c 250 {
grzemich 0:d7bd7384a37c 251 /* node is already there */
grzemich 0:d7bd7384a37c 252 LWIP_DEBUGF(SNMP_MIB_DEBUG,("node already there objid==%"S32_F"\n",objid));
grzemich 0:d7bd7384a37c 253 *insn = n;
grzemich 0:d7bd7384a37c 254 insert = 2;
grzemich 0:d7bd7384a37c 255 }
grzemich 0:d7bd7384a37c 256 else if (n->objid < objid)
grzemich 0:d7bd7384a37c 257 {
grzemich 0:d7bd7384a37c 258 if (n->next == NULL)
grzemich 0:d7bd7384a37c 259 {
grzemich 0:d7bd7384a37c 260 /* alloc and insert at the tail */
grzemich 0:d7bd7384a37c 261 LWIP_DEBUGF(SNMP_MIB_DEBUG,("alloc ins tail objid==%"S32_F"\n",objid));
grzemich 0:d7bd7384a37c 262 nn = snmp_mib_ln_alloc(objid);
grzemich 0:d7bd7384a37c 263 if (nn != NULL)
grzemich 0:d7bd7384a37c 264 {
grzemich 0:d7bd7384a37c 265 nn->next = NULL;
grzemich 0:d7bd7384a37c 266 nn->prev = n;
grzemich 0:d7bd7384a37c 267 n->next = nn;
grzemich 0:d7bd7384a37c 268 rn->tail = nn;
grzemich 0:d7bd7384a37c 269 *insn = nn;
grzemich 0:d7bd7384a37c 270 insert = 1;
grzemich 0:d7bd7384a37c 271 }
grzemich 0:d7bd7384a37c 272 else
grzemich 0:d7bd7384a37c 273 {
grzemich 0:d7bd7384a37c 274 /* insertion failure */
grzemich 0:d7bd7384a37c 275 insert = -1;
grzemich 0:d7bd7384a37c 276 }
grzemich 0:d7bd7384a37c 277 }
grzemich 0:d7bd7384a37c 278 else
grzemich 0:d7bd7384a37c 279 {
grzemich 0:d7bd7384a37c 280 /* there's more to explore: traverse list */
grzemich 0:d7bd7384a37c 281 LWIP_DEBUGF(SNMP_MIB_DEBUG,("traverse list\n"));
grzemich 0:d7bd7384a37c 282 n = n->next;
grzemich 0:d7bd7384a37c 283 }
grzemich 0:d7bd7384a37c 284 }
grzemich 0:d7bd7384a37c 285 else
grzemich 0:d7bd7384a37c 286 {
grzemich 0:d7bd7384a37c 287 /* n->objid > objid */
grzemich 0:d7bd7384a37c 288 /* alloc and insert between n->prev and n */
grzemich 0:d7bd7384a37c 289 LWIP_DEBUGF(SNMP_MIB_DEBUG,("alloc ins n->prev, objid==%"S32_F", n\n",objid));
grzemich 0:d7bd7384a37c 290 nn = snmp_mib_ln_alloc(objid);
grzemich 0:d7bd7384a37c 291 if (nn != NULL)
grzemich 0:d7bd7384a37c 292 {
grzemich 0:d7bd7384a37c 293 if (n->prev == NULL)
grzemich 0:d7bd7384a37c 294 {
grzemich 0:d7bd7384a37c 295 /* insert at the head */
grzemich 0:d7bd7384a37c 296 nn->next = n;
grzemich 0:d7bd7384a37c 297 nn->prev = NULL;
grzemich 0:d7bd7384a37c 298 rn->head = nn;
grzemich 0:d7bd7384a37c 299 n->prev = nn;
grzemich 0:d7bd7384a37c 300 }
grzemich 0:d7bd7384a37c 301 else
grzemich 0:d7bd7384a37c 302 {
grzemich 0:d7bd7384a37c 303 /* insert in the middle */
grzemich 0:d7bd7384a37c 304 nn->next = n;
grzemich 0:d7bd7384a37c 305 nn->prev = n->prev;
grzemich 0:d7bd7384a37c 306 n->prev->next = nn;
grzemich 0:d7bd7384a37c 307 n->prev = nn;
grzemich 0:d7bd7384a37c 308 }
grzemich 0:d7bd7384a37c 309 *insn = nn;
grzemich 0:d7bd7384a37c 310 insert = 1;
grzemich 0:d7bd7384a37c 311 }
grzemich 0:d7bd7384a37c 312 else
grzemich 0:d7bd7384a37c 313 {
grzemich 0:d7bd7384a37c 314 /* insertion failure */
grzemich 0:d7bd7384a37c 315 insert = -1;
grzemich 0:d7bd7384a37c 316 }
grzemich 0:d7bd7384a37c 317 }
grzemich 0:d7bd7384a37c 318 }
grzemich 0:d7bd7384a37c 319 }
grzemich 0:d7bd7384a37c 320 if (insert == 1)
grzemich 0:d7bd7384a37c 321 {
grzemich 0:d7bd7384a37c 322 rn->count += 1;
grzemich 0:d7bd7384a37c 323 }
grzemich 0:d7bd7384a37c 324 LWIP_ASSERT("insert != 0",insert != 0);
grzemich 0:d7bd7384a37c 325 return insert;
grzemich 0:d7bd7384a37c 326 }
grzemich 0:d7bd7384a37c 327
grzemich 0:d7bd7384a37c 328 /**
grzemich 0:d7bd7384a37c 329 * Finds node in idx list and returns deletion mark.
grzemich 0:d7bd7384a37c 330 *
grzemich 0:d7bd7384a37c 331 * @param rn points to the root node
grzemich 0:d7bd7384a37c 332 * @param objid is the object sub identifier
grzemich 0:d7bd7384a37c 333 * @param fn returns pointer to found node
grzemich 0:d7bd7384a37c 334 * @return 0 if not found, 1 if deletable,
grzemich 0:d7bd7384a37c 335 * 2 can't delete (2 or more children), 3 not a list_node
grzemich 0:d7bd7384a37c 336 */
grzemich 0:d7bd7384a37c 337 s8_t
grzemich 0:d7bd7384a37c 338 snmp_mib_node_find(struct mib_list_rootnode *rn, s32_t objid, struct mib_list_node **fn)
grzemich 0:d7bd7384a37c 339 {
grzemich 0:d7bd7384a37c 340 s8_t fc;
grzemich 0:d7bd7384a37c 341 struct mib_list_node *n;
grzemich 0:d7bd7384a37c 342
grzemich 0:d7bd7384a37c 343 LWIP_ASSERT("rn != NULL",rn != NULL);
grzemich 0:d7bd7384a37c 344 n = rn->head;
grzemich 0:d7bd7384a37c 345 while ((n != NULL) && (n->objid != objid))
grzemich 0:d7bd7384a37c 346 {
grzemich 0:d7bd7384a37c 347 n = n->next;
grzemich 0:d7bd7384a37c 348 }
grzemich 0:d7bd7384a37c 349 if (n == NULL)
grzemich 0:d7bd7384a37c 350 {
grzemich 0:d7bd7384a37c 351 fc = 0;
grzemich 0:d7bd7384a37c 352 }
grzemich 0:d7bd7384a37c 353 else if (n->nptr == NULL)
grzemich 0:d7bd7384a37c 354 {
grzemich 0:d7bd7384a37c 355 /* leaf, can delete node */
grzemich 0:d7bd7384a37c 356 fc = 1;
grzemich 0:d7bd7384a37c 357 }
grzemich 0:d7bd7384a37c 358 else
grzemich 0:d7bd7384a37c 359 {
grzemich 0:d7bd7384a37c 360 struct mib_list_rootnode *r;
grzemich 0:d7bd7384a37c 361
grzemich 0:d7bd7384a37c 362 if (n->nptr->node_type == MIB_NODE_LR)
grzemich 0:d7bd7384a37c 363 {
grzemich 0:d7bd7384a37c 364 r = (struct mib_list_rootnode *)n->nptr;
grzemich 0:d7bd7384a37c 365 if (r->count > 1)
grzemich 0:d7bd7384a37c 366 {
grzemich 0:d7bd7384a37c 367 /* can't delete node */
grzemich 0:d7bd7384a37c 368 fc = 2;
grzemich 0:d7bd7384a37c 369 }
grzemich 0:d7bd7384a37c 370 else
grzemich 0:d7bd7384a37c 371 {
grzemich 0:d7bd7384a37c 372 /* count <= 1, can delete node */
grzemich 0:d7bd7384a37c 373 fc = 1;
grzemich 0:d7bd7384a37c 374 }
grzemich 0:d7bd7384a37c 375 }
grzemich 0:d7bd7384a37c 376 else
grzemich 0:d7bd7384a37c 377 {
grzemich 0:d7bd7384a37c 378 /* other node type */
grzemich 0:d7bd7384a37c 379 fc = 3;
grzemich 0:d7bd7384a37c 380 }
grzemich 0:d7bd7384a37c 381 }
grzemich 0:d7bd7384a37c 382 *fn = n;
grzemich 0:d7bd7384a37c 383 return fc;
grzemich 0:d7bd7384a37c 384 }
grzemich 0:d7bd7384a37c 385
grzemich 0:d7bd7384a37c 386 /**
grzemich 0:d7bd7384a37c 387 * Removes node from idx list
grzemich 0:d7bd7384a37c 388 * if it has a single child left.
grzemich 0:d7bd7384a37c 389 *
grzemich 0:d7bd7384a37c 390 * @param rn points to the root node
grzemich 0:d7bd7384a37c 391 * @param n points to the node to delete
grzemich 0:d7bd7384a37c 392 * @return the nptr to be freed by caller
grzemich 0:d7bd7384a37c 393 */
grzemich 0:d7bd7384a37c 394 struct mib_list_rootnode *
grzemich 0:d7bd7384a37c 395 snmp_mib_node_delete(struct mib_list_rootnode *rn, struct mib_list_node *n)
grzemich 0:d7bd7384a37c 396 {
grzemich 0:d7bd7384a37c 397 struct mib_list_rootnode *next;
grzemich 0:d7bd7384a37c 398
grzemich 0:d7bd7384a37c 399 LWIP_ASSERT("rn != NULL",rn != NULL);
grzemich 0:d7bd7384a37c 400 LWIP_ASSERT("n != NULL",n != NULL);
grzemich 0:d7bd7384a37c 401
grzemich 0:d7bd7384a37c 402 /* caller must remove this sub-tree */
grzemich 0:d7bd7384a37c 403 next = (struct mib_list_rootnode*)(n->nptr);
grzemich 0:d7bd7384a37c 404 rn->count -= 1;
grzemich 0:d7bd7384a37c 405
grzemich 0:d7bd7384a37c 406 if (n == rn->head)
grzemich 0:d7bd7384a37c 407 {
grzemich 0:d7bd7384a37c 408 rn->head = n->next;
grzemich 0:d7bd7384a37c 409 if (n->next != NULL)
grzemich 0:d7bd7384a37c 410 {
grzemich 0:d7bd7384a37c 411 /* not last node, new list begin */
grzemich 0:d7bd7384a37c 412 n->next->prev = NULL;
grzemich 0:d7bd7384a37c 413 }
grzemich 0:d7bd7384a37c 414 }
grzemich 0:d7bd7384a37c 415 else if (n == rn->tail)
grzemich 0:d7bd7384a37c 416 {
grzemich 0:d7bd7384a37c 417 rn->tail = n->prev;
grzemich 0:d7bd7384a37c 418 if (n->prev != NULL)
grzemich 0:d7bd7384a37c 419 {
grzemich 0:d7bd7384a37c 420 /* not last node, new list end */
grzemich 0:d7bd7384a37c 421 n->prev->next = NULL;
grzemich 0:d7bd7384a37c 422 }
grzemich 0:d7bd7384a37c 423 }
grzemich 0:d7bd7384a37c 424 else
grzemich 0:d7bd7384a37c 425 {
grzemich 0:d7bd7384a37c 426 /* node must be in the middle */
grzemich 0:d7bd7384a37c 427 n->prev->next = n->next;
grzemich 0:d7bd7384a37c 428 n->next->prev = n->prev;
grzemich 0:d7bd7384a37c 429 }
grzemich 0:d7bd7384a37c 430 LWIP_DEBUGF(SNMP_MIB_DEBUG,("free list objid==%"S32_F"\n",n->objid));
grzemich 0:d7bd7384a37c 431 snmp_mib_ln_free(n);
grzemich 0:d7bd7384a37c 432 if (rn->count == 0)
grzemich 0:d7bd7384a37c 433 {
grzemich 0:d7bd7384a37c 434 rn->head = NULL;
grzemich 0:d7bd7384a37c 435 rn->tail = NULL;
grzemich 0:d7bd7384a37c 436 }
grzemich 0:d7bd7384a37c 437 return next;
grzemich 0:d7bd7384a37c 438 }
grzemich 0:d7bd7384a37c 439
grzemich 0:d7bd7384a37c 440
grzemich 0:d7bd7384a37c 441
grzemich 0:d7bd7384a37c 442 /**
grzemich 0:d7bd7384a37c 443 * Searches tree for the supplied (scalar?) object identifier.
grzemich 0:d7bd7384a37c 444 *
grzemich 0:d7bd7384a37c 445 * @param node points to the root of the tree ('.internet')
grzemich 0:d7bd7384a37c 446 * @param ident_len the length of the supplied object identifier
grzemich 0:d7bd7384a37c 447 * @param ident points to the array of sub identifiers
grzemich 0:d7bd7384a37c 448 * @param np points to the found object instance (return)
grzemich 0:d7bd7384a37c 449 * @return pointer to the requested parent (!) node if success, NULL otherwise
grzemich 0:d7bd7384a37c 450 */
grzemich 0:d7bd7384a37c 451 struct mib_node *
grzemich 0:d7bd7384a37c 452 snmp_search_tree(struct mib_node *node, u8_t ident_len, s32_t *ident, struct snmp_name_ptr *np)
grzemich 0:d7bd7384a37c 453 {
grzemich 0:d7bd7384a37c 454 u8_t node_type, ext_level;
grzemich 0:d7bd7384a37c 455
grzemich 0:d7bd7384a37c 456 ext_level = 0;
grzemich 0:d7bd7384a37c 457 LWIP_DEBUGF(SNMP_MIB_DEBUG,("node==%p *ident==%"S32_F"\n",(void*)node,*ident));
grzemich 0:d7bd7384a37c 458 while (node != NULL)
grzemich 0:d7bd7384a37c 459 {
grzemich 0:d7bd7384a37c 460 node_type = node->node_type;
grzemich 0:d7bd7384a37c 461 if ((node_type == MIB_NODE_AR) || (node_type == MIB_NODE_RA))
grzemich 0:d7bd7384a37c 462 {
grzemich 0:d7bd7384a37c 463 struct mib_array_node *an;
grzemich 0:d7bd7384a37c 464 u16_t i;
grzemich 0:d7bd7384a37c 465
grzemich 0:d7bd7384a37c 466 if (ident_len > 0)
grzemich 0:d7bd7384a37c 467 {
grzemich 0:d7bd7384a37c 468 /* array node (internal ROM or RAM, fixed length) */
grzemich 0:d7bd7384a37c 469 an = (struct mib_array_node *)node;
grzemich 0:d7bd7384a37c 470 i = 0;
grzemich 0:d7bd7384a37c 471 while ((i < an->maxlength) && (an->objid[i] != *ident))
grzemich 0:d7bd7384a37c 472 {
grzemich 0:d7bd7384a37c 473 i++;
grzemich 0:d7bd7384a37c 474 }
grzemich 0:d7bd7384a37c 475 if (i < an->maxlength)
grzemich 0:d7bd7384a37c 476 {
grzemich 0:d7bd7384a37c 477 /* found it, if available proceed to child, otherwise inspect leaf */
grzemich 0:d7bd7384a37c 478 LWIP_DEBUGF(SNMP_MIB_DEBUG,("an->objid[%"U16_F"]==%"S32_F" *ident==%"S32_F"\n",i,an->objid[i],*ident));
grzemich 0:d7bd7384a37c 479 if (an->nptr[i] == NULL)
grzemich 0:d7bd7384a37c 480 {
grzemich 0:d7bd7384a37c 481 /* a scalar leaf OR table,
grzemich 0:d7bd7384a37c 482 inspect remaining instance number / table index */
grzemich 0:d7bd7384a37c 483 np->ident_len = ident_len;
grzemich 0:d7bd7384a37c 484 np->ident = ident;
grzemich 0:d7bd7384a37c 485 return (struct mib_node*)an;
grzemich 0:d7bd7384a37c 486 }
grzemich 0:d7bd7384a37c 487 else
grzemich 0:d7bd7384a37c 488 {
grzemich 0:d7bd7384a37c 489 /* follow next child pointer */
grzemich 0:d7bd7384a37c 490 ident++;
grzemich 0:d7bd7384a37c 491 ident_len--;
grzemich 0:d7bd7384a37c 492 node = an->nptr[i];
grzemich 0:d7bd7384a37c 493 }
grzemich 0:d7bd7384a37c 494 }
grzemich 0:d7bd7384a37c 495 else
grzemich 0:d7bd7384a37c 496 {
grzemich 0:d7bd7384a37c 497 /* search failed, identifier mismatch (nosuchname) */
grzemich 0:d7bd7384a37c 498 LWIP_DEBUGF(SNMP_MIB_DEBUG,("an search failed *ident==%"S32_F"\n",*ident));
grzemich 0:d7bd7384a37c 499 return NULL;
grzemich 0:d7bd7384a37c 500 }
grzemich 0:d7bd7384a37c 501 }
grzemich 0:d7bd7384a37c 502 else
grzemich 0:d7bd7384a37c 503 {
grzemich 0:d7bd7384a37c 504 /* search failed, short object identifier (nosuchname) */
grzemich 0:d7bd7384a37c 505 LWIP_DEBUGF(SNMP_MIB_DEBUG,("an search failed, short object identifier\n"));
grzemich 0:d7bd7384a37c 506 return NULL;
grzemich 0:d7bd7384a37c 507 }
grzemich 0:d7bd7384a37c 508 }
grzemich 0:d7bd7384a37c 509 else if(node_type == MIB_NODE_LR)
grzemich 0:d7bd7384a37c 510 {
grzemich 0:d7bd7384a37c 511 struct mib_list_rootnode *lrn;
grzemich 0:d7bd7384a37c 512 struct mib_list_node *ln;
grzemich 0:d7bd7384a37c 513
grzemich 0:d7bd7384a37c 514 if (ident_len > 0)
grzemich 0:d7bd7384a37c 515 {
grzemich 0:d7bd7384a37c 516 /* list root node (internal 'RAM', variable length) */
grzemich 0:d7bd7384a37c 517 lrn = (struct mib_list_rootnode *)node;
grzemich 0:d7bd7384a37c 518 ln = lrn->head;
grzemich 0:d7bd7384a37c 519 /* iterate over list, head to tail */
grzemich 0:d7bd7384a37c 520 while ((ln != NULL) && (ln->objid != *ident))
grzemich 0:d7bd7384a37c 521 {
grzemich 0:d7bd7384a37c 522 ln = ln->next;
grzemich 0:d7bd7384a37c 523 }
grzemich 0:d7bd7384a37c 524 if (ln != NULL)
grzemich 0:d7bd7384a37c 525 {
grzemich 0:d7bd7384a37c 526 /* found it, proceed to child */;
grzemich 0:d7bd7384a37c 527 LWIP_DEBUGF(SNMP_MIB_DEBUG,("ln->objid==%"S32_F" *ident==%"S32_F"\n",ln->objid,*ident));
grzemich 0:d7bd7384a37c 528 if (ln->nptr == NULL)
grzemich 0:d7bd7384a37c 529 {
grzemich 0:d7bd7384a37c 530 np->ident_len = ident_len;
grzemich 0:d7bd7384a37c 531 np->ident = ident;
grzemich 0:d7bd7384a37c 532 return (struct mib_node*)lrn;
grzemich 0:d7bd7384a37c 533 }
grzemich 0:d7bd7384a37c 534 else
grzemich 0:d7bd7384a37c 535 {
grzemich 0:d7bd7384a37c 536 /* follow next child pointer */
grzemich 0:d7bd7384a37c 537 ident_len--;
grzemich 0:d7bd7384a37c 538 ident++;
grzemich 0:d7bd7384a37c 539 node = ln->nptr;
grzemich 0:d7bd7384a37c 540 }
grzemich 0:d7bd7384a37c 541 }
grzemich 0:d7bd7384a37c 542 else
grzemich 0:d7bd7384a37c 543 {
grzemich 0:d7bd7384a37c 544 /* search failed */
grzemich 0:d7bd7384a37c 545 LWIP_DEBUGF(SNMP_MIB_DEBUG,("ln search failed *ident==%"S32_F"\n",*ident));
grzemich 0:d7bd7384a37c 546 return NULL;
grzemich 0:d7bd7384a37c 547 }
grzemich 0:d7bd7384a37c 548 }
grzemich 0:d7bd7384a37c 549 else
grzemich 0:d7bd7384a37c 550 {
grzemich 0:d7bd7384a37c 551 /* search failed, short object identifier (nosuchname) */
grzemich 0:d7bd7384a37c 552 LWIP_DEBUGF(SNMP_MIB_DEBUG,("ln search failed, short object identifier\n"));
grzemich 0:d7bd7384a37c 553 return NULL;
grzemich 0:d7bd7384a37c 554 }
grzemich 0:d7bd7384a37c 555 }
grzemich 0:d7bd7384a37c 556 else if(node_type == MIB_NODE_EX)
grzemich 0:d7bd7384a37c 557 {
grzemich 0:d7bd7384a37c 558 struct mib_external_node *en;
grzemich 0:d7bd7384a37c 559 u16_t i, len;
grzemich 0:d7bd7384a37c 560
grzemich 0:d7bd7384a37c 561 if (ident_len > 0)
grzemich 0:d7bd7384a37c 562 {
grzemich 0:d7bd7384a37c 563 /* external node (addressing and access via functions) */
grzemich 0:d7bd7384a37c 564 en = (struct mib_external_node *)node;
grzemich 0:d7bd7384a37c 565
grzemich 0:d7bd7384a37c 566 i = 0;
grzemich 0:d7bd7384a37c 567 len = en->level_length(en->addr_inf,ext_level);
grzemich 0:d7bd7384a37c 568 while ((i < len) && (en->ident_cmp(en->addr_inf,ext_level,i,*ident) != 0))
grzemich 0:d7bd7384a37c 569 {
grzemich 0:d7bd7384a37c 570 i++;
grzemich 0:d7bd7384a37c 571 }
grzemich 0:d7bd7384a37c 572 if (i < len)
grzemich 0:d7bd7384a37c 573 {
grzemich 0:d7bd7384a37c 574 s32_t debug_id;
grzemich 0:d7bd7384a37c 575
grzemich 0:d7bd7384a37c 576 en->get_objid(en->addr_inf,ext_level,i,&debug_id);
grzemich 0:d7bd7384a37c 577 LWIP_DEBUGF(SNMP_MIB_DEBUG,("en->objid==%"S32_F" *ident==%"S32_F"\n",debug_id,*ident));
grzemich 0:d7bd7384a37c 578 if ((ext_level + 1) == en->tree_levels)
grzemich 0:d7bd7384a37c 579 {
grzemich 0:d7bd7384a37c 580 np->ident_len = ident_len;
grzemich 0:d7bd7384a37c 581 np->ident = ident;
grzemich 0:d7bd7384a37c 582 return (struct mib_node*)en;
grzemich 0:d7bd7384a37c 583 }
grzemich 0:d7bd7384a37c 584 else
grzemich 0:d7bd7384a37c 585 {
grzemich 0:d7bd7384a37c 586 /* found it, proceed to child */
grzemich 0:d7bd7384a37c 587 ident_len--;
grzemich 0:d7bd7384a37c 588 ident++;
grzemich 0:d7bd7384a37c 589 ext_level++;
grzemich 0:d7bd7384a37c 590 }
grzemich 0:d7bd7384a37c 591 }
grzemich 0:d7bd7384a37c 592 else
grzemich 0:d7bd7384a37c 593 {
grzemich 0:d7bd7384a37c 594 /* search failed */
grzemich 0:d7bd7384a37c 595 LWIP_DEBUGF(SNMP_MIB_DEBUG,("en search failed *ident==%"S32_F"\n",*ident));
grzemich 0:d7bd7384a37c 596 return NULL;
grzemich 0:d7bd7384a37c 597 }
grzemich 0:d7bd7384a37c 598 }
grzemich 0:d7bd7384a37c 599 else
grzemich 0:d7bd7384a37c 600 {
grzemich 0:d7bd7384a37c 601 /* search failed, short object identifier (nosuchname) */
grzemich 0:d7bd7384a37c 602 LWIP_DEBUGF(SNMP_MIB_DEBUG,("en search failed, short object identifier\n"));
grzemich 0:d7bd7384a37c 603 return NULL;
grzemich 0:d7bd7384a37c 604 }
grzemich 0:d7bd7384a37c 605 }
grzemich 0:d7bd7384a37c 606 else if (node_type == MIB_NODE_SC)
grzemich 0:d7bd7384a37c 607 {
grzemich 0:d7bd7384a37c 608 mib_scalar_node *sn;
grzemich 0:d7bd7384a37c 609
grzemich 0:d7bd7384a37c 610 sn = (mib_scalar_node *)node;
grzemich 0:d7bd7384a37c 611 if ((ident_len == 1) && (*ident == 0))
grzemich 0:d7bd7384a37c 612 {
grzemich 0:d7bd7384a37c 613 np->ident_len = ident_len;
grzemich 0:d7bd7384a37c 614 np->ident = ident;
grzemich 0:d7bd7384a37c 615 return (struct mib_node*)sn;
grzemich 0:d7bd7384a37c 616 }
grzemich 0:d7bd7384a37c 617 else
grzemich 0:d7bd7384a37c 618 {
grzemich 0:d7bd7384a37c 619 /* search failed, short object identifier (nosuchname) */
grzemich 0:d7bd7384a37c 620 LWIP_DEBUGF(SNMP_MIB_DEBUG,("search failed, invalid object identifier length\n"));
grzemich 0:d7bd7384a37c 621 return NULL;
grzemich 0:d7bd7384a37c 622 }
grzemich 0:d7bd7384a37c 623 }
grzemich 0:d7bd7384a37c 624 else
grzemich 0:d7bd7384a37c 625 {
grzemich 0:d7bd7384a37c 626 /* unknown node_type */
grzemich 0:d7bd7384a37c 627 LWIP_DEBUGF(SNMP_MIB_DEBUG,("search failed node_type %"U16_F" unkown\n",(u16_t)node_type));
grzemich 0:d7bd7384a37c 628 return NULL;
grzemich 0:d7bd7384a37c 629 }
grzemich 0:d7bd7384a37c 630 }
grzemich 0:d7bd7384a37c 631 /* done, found nothing */
grzemich 0:d7bd7384a37c 632 LWIP_DEBUGF(SNMP_MIB_DEBUG,("search failed node==%p\n",(void*)node));
grzemich 0:d7bd7384a37c 633 return NULL;
grzemich 0:d7bd7384a37c 634 }
grzemich 0:d7bd7384a37c 635
grzemich 0:d7bd7384a37c 636 /**
grzemich 0:d7bd7384a37c 637 * Test table for presence of at least one table entry.
grzemich 0:d7bd7384a37c 638 */
grzemich 0:d7bd7384a37c 639 static u8_t
grzemich 0:d7bd7384a37c 640 empty_table(struct mib_node *node)
grzemich 0:d7bd7384a37c 641 {
grzemich 0:d7bd7384a37c 642 u8_t node_type;
grzemich 0:d7bd7384a37c 643 u8_t empty = 0;
grzemich 0:d7bd7384a37c 644
grzemich 0:d7bd7384a37c 645 if (node != NULL)
grzemich 0:d7bd7384a37c 646 {
grzemich 0:d7bd7384a37c 647 node_type = node->node_type;
grzemich 0:d7bd7384a37c 648 if (node_type == MIB_NODE_LR)
grzemich 0:d7bd7384a37c 649 {
grzemich 0:d7bd7384a37c 650 struct mib_list_rootnode *lrn;
grzemich 0:d7bd7384a37c 651 lrn = (struct mib_list_rootnode *)node;
grzemich 0:d7bd7384a37c 652 if ((lrn->count == 0) || (lrn->head == NULL))
grzemich 0:d7bd7384a37c 653 {
grzemich 0:d7bd7384a37c 654 empty = 1;
grzemich 0:d7bd7384a37c 655 }
grzemich 0:d7bd7384a37c 656 }
grzemich 0:d7bd7384a37c 657 else if ((node_type == MIB_NODE_AR) || (node_type == MIB_NODE_RA))
grzemich 0:d7bd7384a37c 658 {
grzemich 0:d7bd7384a37c 659 struct mib_array_node *an;
grzemich 0:d7bd7384a37c 660 an = (struct mib_array_node *)node;
grzemich 0:d7bd7384a37c 661 if ((an->maxlength == 0) || (an->nptr == NULL))
grzemich 0:d7bd7384a37c 662 {
grzemich 0:d7bd7384a37c 663 empty = 1;
grzemich 0:d7bd7384a37c 664 }
grzemich 0:d7bd7384a37c 665 }
grzemich 0:d7bd7384a37c 666 else if (node_type == MIB_NODE_EX)
grzemich 0:d7bd7384a37c 667 {
grzemich 0:d7bd7384a37c 668 struct mib_external_node *en;
grzemich 0:d7bd7384a37c 669 en = (struct mib_external_node *)node;
grzemich 0:d7bd7384a37c 670 if (en->tree_levels == 0)
grzemich 0:d7bd7384a37c 671 {
grzemich 0:d7bd7384a37c 672 empty = 1;
grzemich 0:d7bd7384a37c 673 }
grzemich 0:d7bd7384a37c 674 }
grzemich 0:d7bd7384a37c 675 }
grzemich 0:d7bd7384a37c 676 return empty;
grzemich 0:d7bd7384a37c 677 }
grzemich 0:d7bd7384a37c 678
grzemich 0:d7bd7384a37c 679 /**
grzemich 0:d7bd7384a37c 680 * Tree expansion.
grzemich 0:d7bd7384a37c 681 */
grzemich 0:d7bd7384a37c 682 struct mib_node *
grzemich 0:d7bd7384a37c 683 snmp_expand_tree(struct mib_node *node, u8_t ident_len, s32_t *ident, struct snmp_obj_id *oidret)
grzemich 0:d7bd7384a37c 684 {
grzemich 0:d7bd7384a37c 685 u8_t node_type, ext_level, climb_tree;
grzemich 0:d7bd7384a37c 686
grzemich 0:d7bd7384a37c 687 ext_level = 0;
grzemich 0:d7bd7384a37c 688 /* reset node stack */
grzemich 0:d7bd7384a37c 689 node_stack_cnt = 0;
grzemich 0:d7bd7384a37c 690 while (node != NULL)
grzemich 0:d7bd7384a37c 691 {
grzemich 0:d7bd7384a37c 692 climb_tree = 0;
grzemich 0:d7bd7384a37c 693 node_type = node->node_type;
grzemich 0:d7bd7384a37c 694 if ((node_type == MIB_NODE_AR) || (node_type == MIB_NODE_RA))
grzemich 0:d7bd7384a37c 695 {
grzemich 0:d7bd7384a37c 696 struct mib_array_node *an;
grzemich 0:d7bd7384a37c 697 u16_t i;
grzemich 0:d7bd7384a37c 698
grzemich 0:d7bd7384a37c 699 /* array node (internal ROM or RAM, fixed length) */
grzemich 0:d7bd7384a37c 700 an = (struct mib_array_node *)node;
grzemich 0:d7bd7384a37c 701 if (ident_len > 0)
grzemich 0:d7bd7384a37c 702 {
grzemich 0:d7bd7384a37c 703 i = 0;
grzemich 0:d7bd7384a37c 704 while ((i < an->maxlength) && (an->objid[i] < *ident))
grzemich 0:d7bd7384a37c 705 {
grzemich 0:d7bd7384a37c 706 i++;
grzemich 0:d7bd7384a37c 707 }
grzemich 0:d7bd7384a37c 708 if (i < an->maxlength)
grzemich 0:d7bd7384a37c 709 {
grzemich 0:d7bd7384a37c 710 LWIP_DEBUGF(SNMP_MIB_DEBUG,("an->objid[%"U16_F"]==%"S32_F" *ident==%"S32_F"\n",i,an->objid[i],*ident));
grzemich 0:d7bd7384a37c 711 /* add identifier to oidret */
grzemich 0:d7bd7384a37c 712 oidret->id[oidret->len] = an->objid[i];
grzemich 0:d7bd7384a37c 713 (oidret->len)++;
grzemich 0:d7bd7384a37c 714
grzemich 0:d7bd7384a37c 715 if (an->nptr[i] == NULL)
grzemich 0:d7bd7384a37c 716 {
grzemich 0:d7bd7384a37c 717 LWIP_DEBUGF(SNMP_MIB_DEBUG,("leaf node\n"));
grzemich 0:d7bd7384a37c 718 /* leaf node (e.g. in a fixed size table) */
grzemich 0:d7bd7384a37c 719 if (an->objid[i] > *ident)
grzemich 0:d7bd7384a37c 720 {
grzemich 0:d7bd7384a37c 721 return (struct mib_node*)an;
grzemich 0:d7bd7384a37c 722 }
grzemich 0:d7bd7384a37c 723 else if ((i + 1) < an->maxlength)
grzemich 0:d7bd7384a37c 724 {
grzemich 0:d7bd7384a37c 725 /* an->objid[i] == *ident */
grzemich 0:d7bd7384a37c 726 (oidret->len)--;
grzemich 0:d7bd7384a37c 727 oidret->id[oidret->len] = an->objid[i + 1];
grzemich 0:d7bd7384a37c 728 (oidret->len)++;
grzemich 0:d7bd7384a37c 729 return (struct mib_node*)an;
grzemich 0:d7bd7384a37c 730 }
grzemich 0:d7bd7384a37c 731 else
grzemich 0:d7bd7384a37c 732 {
grzemich 0:d7bd7384a37c 733 /* (i + 1) == an->maxlength */
grzemich 0:d7bd7384a37c 734 (oidret->len)--;
grzemich 0:d7bd7384a37c 735 climb_tree = 1;
grzemich 0:d7bd7384a37c 736 }
grzemich 0:d7bd7384a37c 737 }
grzemich 0:d7bd7384a37c 738 else
grzemich 0:d7bd7384a37c 739 {
grzemich 0:d7bd7384a37c 740 u8_t j;
grzemich 0:d7bd7384a37c 741 struct nse cur_node;
grzemich 0:d7bd7384a37c 742
grzemich 0:d7bd7384a37c 743 LWIP_DEBUGF(SNMP_MIB_DEBUG,("non-leaf node\n"));
grzemich 0:d7bd7384a37c 744 /* non-leaf, store right child ptr and id */
grzemich 0:d7bd7384a37c 745 LWIP_ASSERT("i < 0xff", i < 0xff);
grzemich 0:d7bd7384a37c 746 j = (u8_t)i + 1;
grzemich 0:d7bd7384a37c 747 while ((j < an->maxlength) && (empty_table(an->nptr[j])))
grzemich 0:d7bd7384a37c 748 {
grzemich 0:d7bd7384a37c 749 j++;
grzemich 0:d7bd7384a37c 750 }
grzemich 0:d7bd7384a37c 751 if (j < an->maxlength)
grzemich 0:d7bd7384a37c 752 {
grzemich 0:d7bd7384a37c 753 cur_node.r_ptr = an->nptr[j];
grzemich 0:d7bd7384a37c 754 cur_node.r_id = an->objid[j];
grzemich 0:d7bd7384a37c 755 cur_node.r_nl = 0;
grzemich 0:d7bd7384a37c 756 }
grzemich 0:d7bd7384a37c 757 else
grzemich 0:d7bd7384a37c 758 {
grzemich 0:d7bd7384a37c 759 cur_node.r_ptr = NULL;
grzemich 0:d7bd7384a37c 760 }
grzemich 0:d7bd7384a37c 761 push_node(&cur_node);
grzemich 0:d7bd7384a37c 762 if (an->objid[i] == *ident)
grzemich 0:d7bd7384a37c 763 {
grzemich 0:d7bd7384a37c 764 ident_len--;
grzemich 0:d7bd7384a37c 765 ident++;
grzemich 0:d7bd7384a37c 766 }
grzemich 0:d7bd7384a37c 767 else
grzemich 0:d7bd7384a37c 768 {
grzemich 0:d7bd7384a37c 769 /* an->objid[i] < *ident */
grzemich 0:d7bd7384a37c 770 ident_len = 0;
grzemich 0:d7bd7384a37c 771 }
grzemich 0:d7bd7384a37c 772 /* follow next child pointer */
grzemich 0:d7bd7384a37c 773 node = an->nptr[i];
grzemich 0:d7bd7384a37c 774 }
grzemich 0:d7bd7384a37c 775 }
grzemich 0:d7bd7384a37c 776 else
grzemich 0:d7bd7384a37c 777 {
grzemich 0:d7bd7384a37c 778 /* i == an->maxlength */
grzemich 0:d7bd7384a37c 779 climb_tree = 1;
grzemich 0:d7bd7384a37c 780 }
grzemich 0:d7bd7384a37c 781 }
grzemich 0:d7bd7384a37c 782 else
grzemich 0:d7bd7384a37c 783 {
grzemich 0:d7bd7384a37c 784 u8_t j;
grzemich 0:d7bd7384a37c 785 /* ident_len == 0, complete with leftmost '.thing' */
grzemich 0:d7bd7384a37c 786 j = 0;
grzemich 0:d7bd7384a37c 787 while ((j < an->maxlength) && empty_table(an->nptr[j]))
grzemich 0:d7bd7384a37c 788 {
grzemich 0:d7bd7384a37c 789 j++;
grzemich 0:d7bd7384a37c 790 }
grzemich 0:d7bd7384a37c 791 if (j < an->maxlength)
grzemich 0:d7bd7384a37c 792 {
grzemich 0:d7bd7384a37c 793 LWIP_DEBUGF(SNMP_MIB_DEBUG,("left an->objid[j]==%"S32_F"\n",an->objid[j]));
grzemich 0:d7bd7384a37c 794 oidret->id[oidret->len] = an->objid[j];
grzemich 0:d7bd7384a37c 795 (oidret->len)++;
grzemich 0:d7bd7384a37c 796 if (an->nptr[j] == NULL)
grzemich 0:d7bd7384a37c 797 {
grzemich 0:d7bd7384a37c 798 /* leaf node */
grzemich 0:d7bd7384a37c 799 return (struct mib_node*)an;
grzemich 0:d7bd7384a37c 800 }
grzemich 0:d7bd7384a37c 801 else
grzemich 0:d7bd7384a37c 802 {
grzemich 0:d7bd7384a37c 803 /* no leaf, continue */
grzemich 0:d7bd7384a37c 804 node = an->nptr[j];
grzemich 0:d7bd7384a37c 805 }
grzemich 0:d7bd7384a37c 806 }
grzemich 0:d7bd7384a37c 807 else
grzemich 0:d7bd7384a37c 808 {
grzemich 0:d7bd7384a37c 809 /* j == an->maxlength */
grzemich 0:d7bd7384a37c 810 climb_tree = 1;
grzemich 0:d7bd7384a37c 811 }
grzemich 0:d7bd7384a37c 812 }
grzemich 0:d7bd7384a37c 813 }
grzemich 0:d7bd7384a37c 814 else if(node_type == MIB_NODE_LR)
grzemich 0:d7bd7384a37c 815 {
grzemich 0:d7bd7384a37c 816 struct mib_list_rootnode *lrn;
grzemich 0:d7bd7384a37c 817 struct mib_list_node *ln;
grzemich 0:d7bd7384a37c 818
grzemich 0:d7bd7384a37c 819 /* list root node (internal 'RAM', variable length) */
grzemich 0:d7bd7384a37c 820 lrn = (struct mib_list_rootnode *)node;
grzemich 0:d7bd7384a37c 821 if (ident_len > 0)
grzemich 0:d7bd7384a37c 822 {
grzemich 0:d7bd7384a37c 823 ln = lrn->head;
grzemich 0:d7bd7384a37c 824 /* iterate over list, head to tail */
grzemich 0:d7bd7384a37c 825 while ((ln != NULL) && (ln->objid < *ident))
grzemich 0:d7bd7384a37c 826 {
grzemich 0:d7bd7384a37c 827 ln = ln->next;
grzemich 0:d7bd7384a37c 828 }
grzemich 0:d7bd7384a37c 829 if (ln != NULL)
grzemich 0:d7bd7384a37c 830 {
grzemich 0:d7bd7384a37c 831 LWIP_DEBUGF(SNMP_MIB_DEBUG,("ln->objid==%"S32_F" *ident==%"S32_F"\n",ln->objid,*ident));
grzemich 0:d7bd7384a37c 832 oidret->id[oidret->len] = ln->objid;
grzemich 0:d7bd7384a37c 833 (oidret->len)++;
grzemich 0:d7bd7384a37c 834 if (ln->nptr == NULL)
grzemich 0:d7bd7384a37c 835 {
grzemich 0:d7bd7384a37c 836 /* leaf node */
grzemich 0:d7bd7384a37c 837 if (ln->objid > *ident)
grzemich 0:d7bd7384a37c 838 {
grzemich 0:d7bd7384a37c 839 return (struct mib_node*)lrn;
grzemich 0:d7bd7384a37c 840 }
grzemich 0:d7bd7384a37c 841 else if (ln->next != NULL)
grzemich 0:d7bd7384a37c 842 {
grzemich 0:d7bd7384a37c 843 /* ln->objid == *ident */
grzemich 0:d7bd7384a37c 844 (oidret->len)--;
grzemich 0:d7bd7384a37c 845 oidret->id[oidret->len] = ln->next->objid;
grzemich 0:d7bd7384a37c 846 (oidret->len)++;
grzemich 0:d7bd7384a37c 847 return (struct mib_node*)lrn;
grzemich 0:d7bd7384a37c 848 }
grzemich 0:d7bd7384a37c 849 else
grzemich 0:d7bd7384a37c 850 {
grzemich 0:d7bd7384a37c 851 /* ln->next == NULL */
grzemich 0:d7bd7384a37c 852 (oidret->len)--;
grzemich 0:d7bd7384a37c 853 climb_tree = 1;
grzemich 0:d7bd7384a37c 854 }
grzemich 0:d7bd7384a37c 855 }
grzemich 0:d7bd7384a37c 856 else
grzemich 0:d7bd7384a37c 857 {
grzemich 0:d7bd7384a37c 858 struct mib_list_node *jn;
grzemich 0:d7bd7384a37c 859 struct nse cur_node;
grzemich 0:d7bd7384a37c 860
grzemich 0:d7bd7384a37c 861 /* non-leaf, store right child ptr and id */
grzemich 0:d7bd7384a37c 862 jn = ln->next;
grzemich 0:d7bd7384a37c 863 while ((jn != NULL) && empty_table(jn->nptr))
grzemich 0:d7bd7384a37c 864 {
grzemich 0:d7bd7384a37c 865 jn = jn->next;
grzemich 0:d7bd7384a37c 866 }
grzemich 0:d7bd7384a37c 867 if (jn != NULL)
grzemich 0:d7bd7384a37c 868 {
grzemich 0:d7bd7384a37c 869 cur_node.r_ptr = jn->nptr;
grzemich 0:d7bd7384a37c 870 cur_node.r_id = jn->objid;
grzemich 0:d7bd7384a37c 871 cur_node.r_nl = 0;
grzemich 0:d7bd7384a37c 872 }
grzemich 0:d7bd7384a37c 873 else
grzemich 0:d7bd7384a37c 874 {
grzemich 0:d7bd7384a37c 875 cur_node.r_ptr = NULL;
grzemich 0:d7bd7384a37c 876 }
grzemich 0:d7bd7384a37c 877 push_node(&cur_node);
grzemich 0:d7bd7384a37c 878 if (ln->objid == *ident)
grzemich 0:d7bd7384a37c 879 {
grzemich 0:d7bd7384a37c 880 ident_len--;
grzemich 0:d7bd7384a37c 881 ident++;
grzemich 0:d7bd7384a37c 882 }
grzemich 0:d7bd7384a37c 883 else
grzemich 0:d7bd7384a37c 884 {
grzemich 0:d7bd7384a37c 885 /* ln->objid < *ident */
grzemich 0:d7bd7384a37c 886 ident_len = 0;
grzemich 0:d7bd7384a37c 887 }
grzemich 0:d7bd7384a37c 888 /* follow next child pointer */
grzemich 0:d7bd7384a37c 889 node = ln->nptr;
grzemich 0:d7bd7384a37c 890 }
grzemich 0:d7bd7384a37c 891
grzemich 0:d7bd7384a37c 892 }
grzemich 0:d7bd7384a37c 893 else
grzemich 0:d7bd7384a37c 894 {
grzemich 0:d7bd7384a37c 895 /* ln == NULL */
grzemich 0:d7bd7384a37c 896 climb_tree = 1;
grzemich 0:d7bd7384a37c 897 }
grzemich 0:d7bd7384a37c 898 }
grzemich 0:d7bd7384a37c 899 else
grzemich 0:d7bd7384a37c 900 {
grzemich 0:d7bd7384a37c 901 struct mib_list_node *jn;
grzemich 0:d7bd7384a37c 902 /* ident_len == 0, complete with leftmost '.thing' */
grzemich 0:d7bd7384a37c 903 jn = lrn->head;
grzemich 0:d7bd7384a37c 904 while ((jn != NULL) && empty_table(jn->nptr))
grzemich 0:d7bd7384a37c 905 {
grzemich 0:d7bd7384a37c 906 jn = jn->next;
grzemich 0:d7bd7384a37c 907 }
grzemich 0:d7bd7384a37c 908 if (jn != NULL)
grzemich 0:d7bd7384a37c 909 {
grzemich 0:d7bd7384a37c 910 LWIP_DEBUGF(SNMP_MIB_DEBUG,("left jn->objid==%"S32_F"\n",jn->objid));
grzemich 0:d7bd7384a37c 911 oidret->id[oidret->len] = jn->objid;
grzemich 0:d7bd7384a37c 912 (oidret->len)++;
grzemich 0:d7bd7384a37c 913 if (jn->nptr == NULL)
grzemich 0:d7bd7384a37c 914 {
grzemich 0:d7bd7384a37c 915 /* leaf node */
grzemich 0:d7bd7384a37c 916 LWIP_DEBUGF(SNMP_MIB_DEBUG,("jn->nptr == NULL\n"));
grzemich 0:d7bd7384a37c 917 return (struct mib_node*)lrn;
grzemich 0:d7bd7384a37c 918 }
grzemich 0:d7bd7384a37c 919 else
grzemich 0:d7bd7384a37c 920 {
grzemich 0:d7bd7384a37c 921 /* no leaf, continue */
grzemich 0:d7bd7384a37c 922 node = jn->nptr;
grzemich 0:d7bd7384a37c 923 }
grzemich 0:d7bd7384a37c 924 }
grzemich 0:d7bd7384a37c 925 else
grzemich 0:d7bd7384a37c 926 {
grzemich 0:d7bd7384a37c 927 /* jn == NULL */
grzemich 0:d7bd7384a37c 928 climb_tree = 1;
grzemich 0:d7bd7384a37c 929 }
grzemich 0:d7bd7384a37c 930 }
grzemich 0:d7bd7384a37c 931 }
grzemich 0:d7bd7384a37c 932 else if(node_type == MIB_NODE_EX)
grzemich 0:d7bd7384a37c 933 {
grzemich 0:d7bd7384a37c 934 struct mib_external_node *en;
grzemich 0:d7bd7384a37c 935 s32_t ex_id;
grzemich 0:d7bd7384a37c 936
grzemich 0:d7bd7384a37c 937 /* external node (addressing and access via functions) */
grzemich 0:d7bd7384a37c 938 en = (struct mib_external_node *)node;
grzemich 0:d7bd7384a37c 939 if (ident_len > 0)
grzemich 0:d7bd7384a37c 940 {
grzemich 0:d7bd7384a37c 941 u16_t i, len;
grzemich 0:d7bd7384a37c 942
grzemich 0:d7bd7384a37c 943 i = 0;
grzemich 0:d7bd7384a37c 944 len = en->level_length(en->addr_inf,ext_level);
grzemich 0:d7bd7384a37c 945 while ((i < len) && (en->ident_cmp(en->addr_inf,ext_level,i,*ident) < 0))
grzemich 0:d7bd7384a37c 946 {
grzemich 0:d7bd7384a37c 947 i++;
grzemich 0:d7bd7384a37c 948 }
grzemich 0:d7bd7384a37c 949 if (i < len)
grzemich 0:d7bd7384a37c 950 {
grzemich 0:d7bd7384a37c 951 /* add identifier to oidret */
grzemich 0:d7bd7384a37c 952 en->get_objid(en->addr_inf,ext_level,i,&ex_id);
grzemich 0:d7bd7384a37c 953 LWIP_DEBUGF(SNMP_MIB_DEBUG,("en->objid[%"U16_F"]==%"S32_F" *ident==%"S32_F"\n",i,ex_id,*ident));
grzemich 0:d7bd7384a37c 954 oidret->id[oidret->len] = ex_id;
grzemich 0:d7bd7384a37c 955 (oidret->len)++;
grzemich 0:d7bd7384a37c 956
grzemich 0:d7bd7384a37c 957 if ((ext_level + 1) == en->tree_levels)
grzemich 0:d7bd7384a37c 958 {
grzemich 0:d7bd7384a37c 959 LWIP_DEBUGF(SNMP_MIB_DEBUG,("leaf node\n"));
grzemich 0:d7bd7384a37c 960 /* leaf node */
grzemich 0:d7bd7384a37c 961 if (ex_id > *ident)
grzemich 0:d7bd7384a37c 962 {
grzemich 0:d7bd7384a37c 963 return (struct mib_node*)en;
grzemich 0:d7bd7384a37c 964 }
grzemich 0:d7bd7384a37c 965 else if ((i + 1) < len)
grzemich 0:d7bd7384a37c 966 {
grzemich 0:d7bd7384a37c 967 /* ex_id == *ident */
grzemich 0:d7bd7384a37c 968 en->get_objid(en->addr_inf,ext_level,i + 1,&ex_id);
grzemich 0:d7bd7384a37c 969 (oidret->len)--;
grzemich 0:d7bd7384a37c 970 oidret->id[oidret->len] = ex_id;
grzemich 0:d7bd7384a37c 971 (oidret->len)++;
grzemich 0:d7bd7384a37c 972 return (struct mib_node*)en;
grzemich 0:d7bd7384a37c 973 }
grzemich 0:d7bd7384a37c 974 else
grzemich 0:d7bd7384a37c 975 {
grzemich 0:d7bd7384a37c 976 /* (i + 1) == len */
grzemich 0:d7bd7384a37c 977 (oidret->len)--;
grzemich 0:d7bd7384a37c 978 climb_tree = 1;
grzemich 0:d7bd7384a37c 979 }
grzemich 0:d7bd7384a37c 980 }
grzemich 0:d7bd7384a37c 981 else
grzemich 0:d7bd7384a37c 982 {
grzemich 0:d7bd7384a37c 983 u8_t j;
grzemich 0:d7bd7384a37c 984 struct nse cur_node;
grzemich 0:d7bd7384a37c 985
grzemich 0:d7bd7384a37c 986 LWIP_DEBUGF(SNMP_MIB_DEBUG,("non-leaf node\n"));
grzemich 0:d7bd7384a37c 987 /* non-leaf, store right child ptr and id */
grzemich 0:d7bd7384a37c 988 LWIP_ASSERT("i < 0xff", i < 0xff);
grzemich 0:d7bd7384a37c 989 j = (u8_t)i + 1;
grzemich 0:d7bd7384a37c 990 if (j < len)
grzemich 0:d7bd7384a37c 991 {
grzemich 0:d7bd7384a37c 992 /* right node is the current external node */
grzemich 0:d7bd7384a37c 993 cur_node.r_ptr = node;
grzemich 0:d7bd7384a37c 994 en->get_objid(en->addr_inf,ext_level,j,&cur_node.r_id);
grzemich 0:d7bd7384a37c 995 cur_node.r_nl = ext_level + 1;
grzemich 0:d7bd7384a37c 996 }
grzemich 0:d7bd7384a37c 997 else
grzemich 0:d7bd7384a37c 998 {
grzemich 0:d7bd7384a37c 999 cur_node.r_ptr = NULL;
grzemich 0:d7bd7384a37c 1000 }
grzemich 0:d7bd7384a37c 1001 push_node(&cur_node);
grzemich 0:d7bd7384a37c 1002 if (en->ident_cmp(en->addr_inf,ext_level,i,*ident) == 0)
grzemich 0:d7bd7384a37c 1003 {
grzemich 0:d7bd7384a37c 1004 ident_len--;
grzemich 0:d7bd7384a37c 1005 ident++;
grzemich 0:d7bd7384a37c 1006 }
grzemich 0:d7bd7384a37c 1007 else
grzemich 0:d7bd7384a37c 1008 {
grzemich 0:d7bd7384a37c 1009 /* external id < *ident */
grzemich 0:d7bd7384a37c 1010 ident_len = 0;
grzemich 0:d7bd7384a37c 1011 }
grzemich 0:d7bd7384a37c 1012 /* proceed to child */
grzemich 0:d7bd7384a37c 1013 ext_level++;
grzemich 0:d7bd7384a37c 1014 }
grzemich 0:d7bd7384a37c 1015 }
grzemich 0:d7bd7384a37c 1016 else
grzemich 0:d7bd7384a37c 1017 {
grzemich 0:d7bd7384a37c 1018 /* i == len (en->level_len()) */
grzemich 0:d7bd7384a37c 1019 climb_tree = 1;
grzemich 0:d7bd7384a37c 1020 }
grzemich 0:d7bd7384a37c 1021 }
grzemich 0:d7bd7384a37c 1022 else
grzemich 0:d7bd7384a37c 1023 {
grzemich 0:d7bd7384a37c 1024 /* ident_len == 0, complete with leftmost '.thing' */
grzemich 0:d7bd7384a37c 1025 en->get_objid(en->addr_inf,ext_level,0,&ex_id);
grzemich 0:d7bd7384a37c 1026 LWIP_DEBUGF(SNMP_MIB_DEBUG,("left en->objid==%"S32_F"\n",ex_id));
grzemich 0:d7bd7384a37c 1027 oidret->id[oidret->len] = ex_id;
grzemich 0:d7bd7384a37c 1028 (oidret->len)++;
grzemich 0:d7bd7384a37c 1029 if ((ext_level + 1) == en->tree_levels)
grzemich 0:d7bd7384a37c 1030 {
grzemich 0:d7bd7384a37c 1031 /* leaf node */
grzemich 0:d7bd7384a37c 1032 LWIP_DEBUGF(SNMP_MIB_DEBUG,("(ext_level + 1) == en->tree_levels\n"));
grzemich 0:d7bd7384a37c 1033 return (struct mib_node*)en;
grzemich 0:d7bd7384a37c 1034 }
grzemich 0:d7bd7384a37c 1035 else
grzemich 0:d7bd7384a37c 1036 {
grzemich 0:d7bd7384a37c 1037 /* no leaf, proceed to child */
grzemich 0:d7bd7384a37c 1038 ext_level++;
grzemich 0:d7bd7384a37c 1039 }
grzemich 0:d7bd7384a37c 1040 }
grzemich 0:d7bd7384a37c 1041 }
grzemich 0:d7bd7384a37c 1042 else if(node_type == MIB_NODE_SC)
grzemich 0:d7bd7384a37c 1043 {
grzemich 0:d7bd7384a37c 1044 mib_scalar_node *sn;
grzemich 0:d7bd7384a37c 1045
grzemich 0:d7bd7384a37c 1046 /* scalar node */
grzemich 0:d7bd7384a37c 1047 sn = (mib_scalar_node *)node;
grzemich 0:d7bd7384a37c 1048 if (ident_len > 0)
grzemich 0:d7bd7384a37c 1049 {
grzemich 0:d7bd7384a37c 1050 /* at .0 */
grzemich 0:d7bd7384a37c 1051 climb_tree = 1;
grzemich 0:d7bd7384a37c 1052 }
grzemich 0:d7bd7384a37c 1053 else
grzemich 0:d7bd7384a37c 1054 {
grzemich 0:d7bd7384a37c 1055 /* ident_len == 0, complete object identifier */
grzemich 0:d7bd7384a37c 1056 oidret->id[oidret->len] = 0;
grzemich 0:d7bd7384a37c 1057 (oidret->len)++;
grzemich 0:d7bd7384a37c 1058 /* leaf node */
grzemich 0:d7bd7384a37c 1059 LWIP_DEBUGF(SNMP_MIB_DEBUG,("completed scalar leaf\n"));
grzemich 0:d7bd7384a37c 1060 return (struct mib_node*)sn;
grzemich 0:d7bd7384a37c 1061 }
grzemich 0:d7bd7384a37c 1062 }
grzemich 0:d7bd7384a37c 1063 else
grzemich 0:d7bd7384a37c 1064 {
grzemich 0:d7bd7384a37c 1065 /* unknown/unhandled node_type */
grzemich 0:d7bd7384a37c 1066 LWIP_DEBUGF(SNMP_MIB_DEBUG,("expand failed node_type %"U16_F" unkown\n",(u16_t)node_type));
grzemich 0:d7bd7384a37c 1067 return NULL;
grzemich 0:d7bd7384a37c 1068 }
grzemich 0:d7bd7384a37c 1069
grzemich 0:d7bd7384a37c 1070 if (climb_tree)
grzemich 0:d7bd7384a37c 1071 {
grzemich 0:d7bd7384a37c 1072 struct nse child;
grzemich 0:d7bd7384a37c 1073
grzemich 0:d7bd7384a37c 1074 /* find right child ptr */
grzemich 0:d7bd7384a37c 1075 child.r_ptr = NULL;
grzemich 0:d7bd7384a37c 1076 child.r_id = 0;
grzemich 0:d7bd7384a37c 1077 child.r_nl = 0;
grzemich 0:d7bd7384a37c 1078 while ((node_stack_cnt > 0) && (child.r_ptr == NULL))
grzemich 0:d7bd7384a37c 1079 {
grzemich 0:d7bd7384a37c 1080 pop_node(&child);
grzemich 0:d7bd7384a37c 1081 /* trim returned oid */
grzemich 0:d7bd7384a37c 1082 (oidret->len)--;
grzemich 0:d7bd7384a37c 1083 }
grzemich 0:d7bd7384a37c 1084 if (child.r_ptr != NULL)
grzemich 0:d7bd7384a37c 1085 {
grzemich 0:d7bd7384a37c 1086 /* incoming ident is useless beyond this point */
grzemich 0:d7bd7384a37c 1087 ident_len = 0;
grzemich 0:d7bd7384a37c 1088 oidret->id[oidret->len] = child.r_id;
grzemich 0:d7bd7384a37c 1089 oidret->len++;
grzemich 0:d7bd7384a37c 1090 node = child.r_ptr;
grzemich 0:d7bd7384a37c 1091 ext_level = child.r_nl;
grzemich 0:d7bd7384a37c 1092 }
grzemich 0:d7bd7384a37c 1093 else
grzemich 0:d7bd7384a37c 1094 {
grzemich 0:d7bd7384a37c 1095 /* tree ends here ... */
grzemich 0:d7bd7384a37c 1096 LWIP_DEBUGF(SNMP_MIB_DEBUG,("expand failed, tree ends here\n"));
grzemich 0:d7bd7384a37c 1097 return NULL;
grzemich 0:d7bd7384a37c 1098 }
grzemich 0:d7bd7384a37c 1099 }
grzemich 0:d7bd7384a37c 1100 }
grzemich 0:d7bd7384a37c 1101 /* done, found nothing */
grzemich 0:d7bd7384a37c 1102 LWIP_DEBUGF(SNMP_MIB_DEBUG,("expand failed node==%p\n",(void*)node));
grzemich 0:d7bd7384a37c 1103 return NULL;
grzemich 0:d7bd7384a37c 1104 }
grzemich 0:d7bd7384a37c 1105
grzemich 0:d7bd7384a37c 1106 /**
grzemich 0:d7bd7384a37c 1107 * Test object identifier for the iso.org.dod.internet prefix.
grzemich 0:d7bd7384a37c 1108 *
grzemich 0:d7bd7384a37c 1109 * @param ident_len the length of the supplied object identifier
grzemich 0:d7bd7384a37c 1110 * @param ident points to the array of sub identifiers
grzemich 0:d7bd7384a37c 1111 * @return 1 if it matches, 0 otherwise
grzemich 0:d7bd7384a37c 1112 */
grzemich 0:d7bd7384a37c 1113 u8_t
grzemich 0:d7bd7384a37c 1114 snmp_iso_prefix_tst(u8_t ident_len, s32_t *ident)
grzemich 0:d7bd7384a37c 1115 {
grzemich 0:d7bd7384a37c 1116 if ((ident_len > 3) &&
grzemich 0:d7bd7384a37c 1117 (ident[0] == 1) && (ident[1] == 3) &&
grzemich 0:d7bd7384a37c 1118 (ident[2] == 6) && (ident[3] == 1))
grzemich 0:d7bd7384a37c 1119 {
grzemich 0:d7bd7384a37c 1120 return 1;
grzemich 0:d7bd7384a37c 1121 }
grzemich 0:d7bd7384a37c 1122 else
grzemich 0:d7bd7384a37c 1123 {
grzemich 0:d7bd7384a37c 1124 return 0;
grzemich 0:d7bd7384a37c 1125 }
grzemich 0:d7bd7384a37c 1126 }
grzemich 0:d7bd7384a37c 1127
grzemich 0:d7bd7384a37c 1128 /**
grzemich 0:d7bd7384a37c 1129 * Expands object identifier to the iso.org.dod.internet
grzemich 0:d7bd7384a37c 1130 * prefix for use in getnext operation.
grzemich 0:d7bd7384a37c 1131 *
grzemich 0:d7bd7384a37c 1132 * @param ident_len the length of the supplied object identifier
grzemich 0:d7bd7384a37c 1133 * @param ident points to the array of sub identifiers
grzemich 0:d7bd7384a37c 1134 * @param oidret points to returned expanded object identifier
grzemich 0:d7bd7384a37c 1135 * @return 1 if it matches, 0 otherwise
grzemich 0:d7bd7384a37c 1136 *
grzemich 0:d7bd7384a37c 1137 * @note ident_len 0 is allowed, expanding to the first known object id!!
grzemich 0:d7bd7384a37c 1138 */
grzemich 0:d7bd7384a37c 1139 u8_t
grzemich 0:d7bd7384a37c 1140 snmp_iso_prefix_expand(u8_t ident_len, s32_t *ident, struct snmp_obj_id *oidret)
grzemich 0:d7bd7384a37c 1141 {
grzemich 0:d7bd7384a37c 1142 const s32_t *prefix_ptr;
grzemich 0:d7bd7384a37c 1143 s32_t *ret_ptr;
grzemich 0:d7bd7384a37c 1144 u8_t i;
grzemich 0:d7bd7384a37c 1145
grzemich 0:d7bd7384a37c 1146 i = 0;
grzemich 0:d7bd7384a37c 1147 prefix_ptr = &prefix[0];
grzemich 0:d7bd7384a37c 1148 ret_ptr = &oidret->id[0];
grzemich 0:d7bd7384a37c 1149 ident_len = ((ident_len < 4)?ident_len:4);
grzemich 0:d7bd7384a37c 1150 while ((i < ident_len) && ((*ident) <= (*prefix_ptr)))
grzemich 0:d7bd7384a37c 1151 {
grzemich 0:d7bd7384a37c 1152 *ret_ptr++ = *prefix_ptr++;
grzemich 0:d7bd7384a37c 1153 ident++;
grzemich 0:d7bd7384a37c 1154 i++;
grzemich 0:d7bd7384a37c 1155 }
grzemich 0:d7bd7384a37c 1156 if (i == ident_len)
grzemich 0:d7bd7384a37c 1157 {
grzemich 0:d7bd7384a37c 1158 /* match, complete missing bits */
grzemich 0:d7bd7384a37c 1159 while (i < 4)
grzemich 0:d7bd7384a37c 1160 {
grzemich 0:d7bd7384a37c 1161 *ret_ptr++ = *prefix_ptr++;
grzemich 0:d7bd7384a37c 1162 i++;
grzemich 0:d7bd7384a37c 1163 }
grzemich 0:d7bd7384a37c 1164 oidret->len = i;
grzemich 0:d7bd7384a37c 1165 return 1;
grzemich 0:d7bd7384a37c 1166 }
grzemich 0:d7bd7384a37c 1167 else
grzemich 0:d7bd7384a37c 1168 {
grzemich 0:d7bd7384a37c 1169 /* i != ident_len */
grzemich 0:d7bd7384a37c 1170 return 0;
grzemich 0:d7bd7384a37c 1171 }
grzemich 0:d7bd7384a37c 1172 }
grzemich 0:d7bd7384a37c 1173
grzemich 0:d7bd7384a37c 1174 #endif /* LWIP_SNMP */