epan/oids.c

   1 /* oids.c
   2  * Object IDentifier Support
   3  *
   4  * (c) 2007, Luis E. Garcia Ontanon <luis@ontanon.org>
   5  *
   6  * $Id$
   7  *
   8  * Wireshark - Network traffic analyzer
   9  * By Gerald Combs <gerald@wireshark.org>
  10  * Copyright 1998 Gerald Combs
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This program is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  25  */
  26
  27 #include "config.h"
  28
  29 #include <glib.h>
  30 #include <stdio.h>
  31 #include <string.h>
  32 #include <ctype.h>
  33
  34 #include <wsutil/report_err.h>
  35
  36 #include "emem.h"
  37 #include "wmem/wmem.h"
  38 #include "uat.h"
  39 #include "prefs.h"
  40 #include "proto.h"
  41 #include "packet.h"
  42 #include "filesystem.h"
  43 #include "dissectors/packet-ber.h"
  44
  45 #ifdef HAVE_LIBSMI
  46 #include <smi.h>
  47
  48 static gboolean oids_init_done = FALSE;
  49 static gboolean load_smi_modules = FALSE;
  50 static gboolean suppress_smi_errors = FALSE;
  51 #endif
  52
  53 #define D(level,args) do if (debuglevel >= level) { printf args; printf("\n"); fflush(stdout); } while(0)
  54
  55 #include "oids.h"
  56
  57 static int debuglevel = 0;
  58
  59 /*
  60  * From SNMPv2-SMI and X.690
  61  *
  62  * Counter32  ::= [APPLICATION 1] IMPLICIT INTEGER (0..4294967295)
  63  * Gauge32    ::= [APPLICATION 2] IMPLICIT INTEGER (0..4294967295)
  64  * Unsigned32 ::= [APPLICATION 2] IMPLICIT INTEGER (0..4294967295) (alias of Gauge32)
  65  * TimeTicks  ::= [APPLICATION 3] IMPLICIT INTEGER (0..4294967295)
  66  *
  67  * If the BER encoding should not have the top bit set as to not become a negative number
  68  * the BER encoding may take 5 octets to encode.
  69  */
  70
  71 static const oid_value_type_t integer_type =    { FT_INT32,  BASE_DEC,  BER_CLASS_UNI, BER_UNI_TAG_INTEGER,     1,   4, OID_KEY_TYPE_INTEGER, 1};
  72 static const oid_value_type_t bytes_type =      { FT_BYTES,  BASE_NONE, BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, 0,  -1, OID_KEY_TYPE_BYTES,   0};
  73 static const oid_value_type_t oid_type =        { FT_OID,    BASE_NONE, BER_CLASS_UNI, BER_UNI_TAG_OID,         1,  -1, OID_KEY_TYPE_OID,     0};
  74 static const oid_value_type_t ipv4_type =       { FT_IPv4,   BASE_NONE, BER_CLASS_APP, 0,                       4,   4, OID_KEY_TYPE_IPADDR,  4};
  75 static const oid_value_type_t counter32_type =  { FT_UINT64, BASE_DEC,  BER_CLASS_APP, 1,                       1,   5, OID_KEY_TYPE_INTEGER, 1};
  76 static const oid_value_type_t unsigned32_type = { FT_UINT64, BASE_DEC,  BER_CLASS_APP, 2,                       1,   5, OID_KEY_TYPE_INTEGER, 1};
  77 static const oid_value_type_t timeticks_type =  { FT_UINT64, BASE_DEC,  BER_CLASS_APP, 3,                       1,   5, OID_KEY_TYPE_INTEGER, 1};
  78 static const oid_value_type_t opaque_type =     { FT_BYTES,  BASE_NONE, BER_CLASS_APP, 4,                       1,   4, OID_KEY_TYPE_BYTES,   0};
  79 static const oid_value_type_t nsap_type =       { FT_BYTES,  BASE_NONE, BER_CLASS_APP, 5,                       0,  -1, OID_KEY_TYPE_NSAP,    0};
  80 static const oid_value_type_t counter64_type =  { FT_UINT64, BASE_DEC,  BER_CLASS_APP, 6,                       1,   8, OID_KEY_TYPE_INTEGER, 1};
  81 static const oid_value_type_t ipv6_type =       { FT_IPv6,   BASE_NONE, BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, 16, 16, OID_KEY_TYPE_BYTES,   16};
  82 static const oid_value_type_t float_type =      { FT_FLOAT,  BASE_DEC,  BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, 4,   4, OID_KEY_TYPE_WRONG,   0};
  83 static const oid_value_type_t double_type =     { FT_DOUBLE, BASE_DEC,  BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, 8,   8, OID_KEY_TYPE_WRONG,   0};
  84 static const oid_value_type_t ether_type =      { FT_ETHER,  BASE_NONE, BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, 6,   6, OID_KEY_TYPE_ETHER,   6};
  85 static const oid_value_type_t string_type =     { FT_STRING, BASE_NONE, BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, 0,  -1, OID_KEY_TYPE_STRING,  0};
  86 static const oid_value_type_t date_and_time_type = { FT_STRING,  BASE_NONE, BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, 8,  11, OID_KEY_TYPE_DATE_AND_TIME,   0};
  87 static const oid_value_type_t unknown_type =    { FT_BYTES,  BASE_NONE, BER_CLASS_ANY, BER_TAG_ANY,             0,  -1, OID_KEY_TYPE_WRONG,   0};
  88
  89 static oid_info_t oid_root = { 0, NULL, OID_KIND_UNKNOWN, NULL, &unknown_type, -2, NULL, NULL, NULL};
  90
  91 static void prepopulate_oids(void) {
  92         if (!oid_root.children) {
  93                 char* debug_env = getenv("WIRESHARK_DEBUG_MIBS");
  94                 guint32 subid;
  95
  96                 debuglevel = debug_env ? (int)strtoul(debug_env,NULL,10) : 0;
  97
  98                 oid_root.children = wmem_tree_new(wmem_epan_scope());
  99
 100                 /*
 101                  * make sure we got strings at least in the three root-children oids
 102                  * that way oid_resolved() will always have a string to print
 103                  */
 104                 subid = 0; oid_add("itu-t",1,&subid);
 105                 subid = 1; oid_add("iso",1,&subid);
 106                 subid = 2; oid_add("joint-iso-itu-t",1,&subid);
 107         }
 108 }
 109
 110
 111
 112 static oid_info_t* add_oid(const char* name, oid_kind_t kind, const oid_value_type_t* type, oid_key_t* key, guint oid_len, guint32 *subids) {
 113         guint i = 0;
 114         oid_info_t* c = &oid_root;
 115
 116         prepopulate_oids();
 117         oid_len--;
 118
 119         do {
 120                 oid_info_t* n = (oid_info_t *)wmem_tree_lookup32(c->children,subids[i]);
 121
 122                 if(n) {
 123                         if (i == oid_len) {
 124                                 if (n->name) {
 125                                         if (!g_str_equal(n->name,name)) {
 126                                                 D(2,("Renaming Oid from: %s -> %s, this means the same oid is registered more than once",n->name,name));
 127                                         }
 128                                         wmem_free(wmem_epan_scope(), n->name);
 129                                 }
 130
 131                                 n->name = wmem_strdup(wmem_epan_scope(), name);
 132
 133                                 if (! n->value_type) {
 134                                         n->value_type = type;
 135                                 }
 136
 137                                 return n;
 138                         }
 139                 } else {
 140                         n = wmem_new(wmem_epan_scope(), oid_info_t);
 141                         n->subid = subids[i];
 142                         n->kind = kind;
 143                         n->children = wmem_tree_new(wmem_epan_scope());
 144                         n->value_hfid = -2;
 145                         n->key = key;
 146                         n->parent = c;
 147                         n->bits = NULL;
 148
 149                         wmem_tree_insert32(c->children,n->subid,n);
 150
 151                         if (i == oid_len) {
 152                                 n->name = wmem_strdup(wmem_epan_scope(), name);
 153                                 n->value_type = type;
 154                                 n->kind = kind;
 155                                 return n;
 156                         } else {
 157                                 n->name = NULL;
 158                                 n->value_type = NULL;
 159                                 n->kind = OID_KIND_UNKNOWN;
 160                         }
 161                 }
 162                 c = n;
 163         } while(++i);
 164
 165         g_assert_not_reached();
 166         return NULL;
 167 }
 168
 169 void oid_add(const char* name, guint oid_len, guint32 *subids) {
 170         g_assert(subids && *subids <= 2);
 171         if (oid_len) {
 172                 D(3,("\tOid (from subids): %s %s ",name?name:"NULL", oid_subid2string(subids,oid_len)));
 173                 add_oid(name,OID_KIND_UNKNOWN,NULL,NULL,oid_len,subids);
 174         } else {
 175                 D(1,("Failed to add Oid: %s (from subids)",name?name:"NULL"));
 176         }
 177 }
 178
 179 void oid_add_from_string(const char* name, const gchar *oid_str) {
 180         guint32* subids;
 181         guint oid_len = oid_string2subid(oid_str, &subids);
 182
 183         if (oid_len) {
 184                 D(3,("\tOid (from string): %s %s ",name?name:"NULL", oid_subid2string(subids,oid_len)));
 185                 add_oid(name,OID_KIND_UNKNOWN,NULL,NULL,oid_len,subids);
 186         } else {
 187                 D(1,("Failed to add Oid: %s %s ",name?name:"NULL", oid_str?oid_str:NULL));
 188         }
 189 }
 190
 191 extern void oid_add_from_encoded(const char* name, const guint8 *oid, gint oid_len) {
 192         guint32* subids;
 193         guint subids_len = oid_encoded2subid(oid, oid_len, &subids);
 194
 195         if (subids_len) {
 196                 D(3,("\tOid (from encoded): %s %s ",name, oid_subid2string(subids,subids_len)));
 197                 add_oid(name,OID_KIND_UNKNOWN,NULL,NULL,subids_len,subids);
 198         } else {
 199                 D(1,("Failed to add Oid: %s [%d]%s ",name?name:"NULL", oid_len,bytestring_to_str(oid, oid_len, ':')));
 200         }
 201 }
 202
 203 #ifdef HAVE_LIBSMI
 204 /* de-allocate storage mallocated by libsmi                            */
 205 /*                                                                     */
 206 /* XXX: libsmi provides access to smiFree as of libsmi v 0.4.8.        */
 207 /*      On Windows: Wireshark 1.01 and later is built and distributed  */
 208 /*      with libsmi 0.4.8 (or newer).                                  */
 209 /*      On non-Windows systems, free() should be OK for libsmi         */
 210 /*       versions older than 0.4.8.                                    */
 211
 212 static void smi_free(void *ptr) {
 213
 214 #if (SMI_VERSION_MAJOR >= 0) && (SMI_VERSION_MINOR >= 4) && (SMI_VERSION_PATCHLEVEL >= 8)
 215        smiFree(ptr);
 216 #else
 217  #ifdef _WIN32
 218  #error Invalid Windows libsmi version ?? !!
 219  #endif
 220 #define xx_free free  /* hack so checkAPIs.pl doesn't complain */
 221        xx_free(ptr);
 222 #endif
 223 }
 224
 225
 226 typedef struct smi_module_t {
 227         char* name;
 228 } smi_module_t;
 229
 230 static smi_module_t* smi_paths = NULL;
 231 static guint num_smi_paths = 0;
 232 static uat_t* smi_paths_uat = NULL;
 233
 234 static smi_module_t* smi_modules = NULL;
 235 static guint num_smi_modules = 0;
 236 static uat_t* smi_modules_uat = NULL;
 237
 238 static GString* smi_errors;
 239
 240 UAT_DIRECTORYNAME_CB_DEF(smi_mod,name,smi_module_t)
 241
 242 static void smi_error_handler(char *path, int line, int severity, char *msg, char *tag) {
 243                 g_string_append_printf(smi_errors,"%s:%d %d %s %s\n",
 244                                                   path ? path : "-",
 245                                                   line, severity,
 246                                                   tag ? tag : "-",
 247                                                   msg ? msg : "");
 248 }
 249
 250
 251 static void* smi_mod_copy_cb(void* dest, const void* orig, size_t len _U_) {
 252         const smi_module_t* m = (const smi_module_t*)orig;
 253         smi_module_t* d = (smi_module_t*)dest;
 254
 255         d->name = g_strdup(m->name);
 256
 257         return d;
 258 }
 259
 260 static void smi_mod_free_cb(void* p) {
 261         smi_module_t* m = (smi_module_t*)p;
 262         g_free(m->name);
 263 }
 264
 265
 266 static char* alnumerize(const char* name) {
 267         char* s = g_strdup(name);
 268         char* r = s;
 269         char* w = r;
 270         char c;
 271
 272         for (;(c = *r); r++) {
 273                 if (isalnum(c) || c == '_' || c == '-' || c == '.') {
 274                         *(w++) = c;
 275                 } else if (c == ':' && r[1] == ':') {
 276                         *(w++) = '.';
 277                 }
 278         }
 279
 280         *w = '\0';
 281
 282         return s;
 283 }
 284
 285 static const oid_value_type_t* get_typedata(SmiType* smiType) {
 286         /*
 287          * There has to be a better way to know if a given
 288          * OCTETSTRING type is actually human readable text,
 289          * an address of some type or some moe specific FT_
 290          * Until that is found, this is the mappping between
 291          * SNMP Types and our FT_s
 292          */
 293         static const struct _type_mapping_t {
 294                 const char* name;
 295                 SmiBasetype base;
 296                 const oid_value_type_t* type;
 297         } types[] =  {
 298                 {"IpAddress", SMI_BASETYPE_UNKNOWN, &ipv4_type},
 299                 {"InetAddressIPv4",SMI_BASETYPE_UNKNOWN,&ipv4_type},
 300                 {"InetAddressIPv6",SMI_BASETYPE_UNKNOWN,&ipv6_type},
 301                 {"NetworkAddress",SMI_BASETYPE_UNKNOWN,&ipv4_type},
 302                 {"MacAddress",SMI_BASETYPE_UNKNOWN,&ether_type},
 303                 {"TimeTicks",SMI_BASETYPE_UNKNOWN,&timeticks_type},
 304                 {"Ipv6Address",SMI_BASETYPE_UNKNOWN,&ipv6_type},
 305                 {"TimeStamp",SMI_BASETYPE_UNKNOWN,&timeticks_type},
 306                 {"DisplayString",SMI_BASETYPE_UNKNOWN,&string_type},
 307                 {"SnmpAdminString",SMI_BASETYPE_UNKNOWN,&string_type},
 308                 {"DateAndTime",SMI_BASETYPE_UNKNOWN,&date_and_time_type},
 309                 {"Counter",SMI_BASETYPE_UNKNOWN,&counter32_type},
 310                 {"Counter32",SMI_BASETYPE_UNKNOWN,&counter32_type},
 311                 {"Unsigned32",SMI_BASETYPE_UNKNOWN,&unsigned32_type},
 312                 {"Gauge",SMI_BASETYPE_UNKNOWN,&unsigned32_type},
 313                 {"Gauge32",SMI_BASETYPE_UNKNOWN,&unsigned32_type},
 314                 {"NsapAddress",SMI_BASETYPE_UNKNOWN,&nsap_type},
 315                 {"i32",SMI_BASETYPE_INTEGER32,&integer_type},
 316                 {"octets",SMI_BASETYPE_OCTETSTRING,&bytes_type},
 317                 {"oid",SMI_BASETYPE_OBJECTIDENTIFIER,&oid_type},
 318                 {"u32",SMI_BASETYPE_UNSIGNED32,&unsigned32_type},
 319                 {"u64",SMI_BASETYPE_UNSIGNED64,&counter64_type},
 320                 {"f32",SMI_BASETYPE_FLOAT32,&float_type},
 321                 {"f64",SMI_BASETYPE_FLOAT64,&double_type},
 322                 {"f128",SMI_BASETYPE_FLOAT128,&bytes_type},
 323                 {"enum",SMI_BASETYPE_ENUM,&integer_type},
 324                 {"bits",SMI_BASETYPE_BITS,&bytes_type},
 325                 {"unk",SMI_BASETYPE_UNKNOWN,&unknown_type},
 326                 {NULL,SMI_BASETYPE_UNKNOWN,NULL} /* SMI_BASETYPE_UNKNOWN = 0 */
 327         };
 328         const struct _type_mapping_t* t;
 329         SmiType* sT = smiType;
 330
 331         if (!smiType) return NULL;
 332
 333         do {
 334                 for (t = types; t->type ; t++ ) {
 335                         char* name = smiRenderType(sT, SMI_RENDER_NAME);
 336                         if (name && t->name && g_str_equal(name, t->name )) {
 337                                 smi_free(name);
 338                                 return t->type;
 339                         }
 340                         if (name) {
 341                                 smi_free (name);
 342                         }
 343                 }
 344         } while(( sT  = smiGetParentType(sT) ));
 345
 346         for (t = types; t->type ; t++ ) {
 347                 if(smiType->basetype == t->base) {
 348                         return t->type;
 349                 }
 350         }
 351
 352         return &unknown_type;
 353 }
 354
 355 static guint get_non_implicit_size(SmiType* sT) {
 356         SmiRange *sR;
 357         guint size = 0xffffffff;
 358
 359         switch (sT->basetype) {
 360                 case SMI_BASETYPE_OCTETSTRING:
 361                 case SMI_BASETYPE_OBJECTIDENTIFIER:
 362                         break;
 363                 default:
 364                         return 0;
 365         }
 366
 367         for ( ; sT; sT = smiGetParentType(sT) ) {
 368                 for (sR = smiGetFirstRange(sT); sR ; sR = smiGetNextRange(sR)) {
 369                         if (size == 0xffffffff) {
 370                                 if (sR->minValue.value.unsigned32 == sR->maxValue.value.unsigned32) {
 371                                         size = (guint32)sR->minValue.value.unsigned32;
 372                                 } else {
 373                                         return 0;
 374                                 }
 375                         } else {
 376                                 if (sR->minValue.value.unsigned32 != size || sR->maxValue.value.unsigned32 != size) {
 377                                         return 0;
 378                                 }
 379                         }
 380                 }
 381         }
 382
 383         return size == 0xffffffff ? 0 : size;
 384 }
 385
 386
 387 static inline oid_kind_t smikind(SmiNode* sN, oid_key_t** key_p) {
 388         *key_p = NULL;
 389
 390         switch(sN->nodekind) {
 391                 case SMI_NODEKIND_ROW: {
 392                         SmiElement* sE;
 393                         oid_key_t* kl = NULL;
 394                         const oid_value_type_t* typedata = NULL;
 395                         gboolean implied;
 396
 397                         switch (sN->indexkind) {
 398                                 case SMI_INDEX_INDEX:
 399                                         break;
 400                                 case SMI_INDEX_AUGMENT:
 401                                 case SMI_INDEX_REORDER:
 402                                 case SMI_INDEX_SPARSE:
 403                                 case SMI_INDEX_EXPAND:
 404                                         sN = smiGetRelatedNode(sN);
 405                                         break;
 406                                 case SMI_INDEX_UNKNOWN:
 407                                         return OID_KIND_UNKNOWN;
 408                         };
 409
 410                         implied = sN->implied;
 411
 412                         for (sE = smiGetFirstElement(sN); sE; sE = smiGetNextElement(sE)) {
 413                                 SmiNode* elNode =  smiGetElementNode(sE) ;
 414                                 SmiType* elType = smiGetNodeType(elNode);
 415                                 oid_key_t* k;
 416                                 guint non_implicit_size = 0;
 417                                 char *oid1, *oid2;
 418
 419                                 if (elType) {
 420                                         non_implicit_size = get_non_implicit_size(elType);
 421                                 }
 422
 423                                 typedata =  get_typedata(elType);
 424
 425                                 k = g_new(oid_key_t,1);
 426
 427                                 oid1 = smiRenderOID(sN->oidlen, sN->oid, SMI_RENDER_QUALIFIED);
 428                                 oid2 = smiRenderOID(elNode->oidlen, elNode->oid, SMI_RENDER_NAME);
 429                                 k->name = g_strdup_printf("%s.%s", oid1, oid2);
 430                                 smi_free (oid1);
 431                                 smi_free (oid2);
 432
 433                                 k->hfid = -2;
 434                                 k->ft_type = typedata ? typedata->ft_type : FT_BYTES;
 435                                 k->display = typedata ? typedata->display : BASE_NONE;
 436                                 k->next = NULL;
 437
 438
 439                                 if (typedata) {
 440                                         k->key_type = typedata->keytype;
 441                                         k->num_subids = typedata->keysize;
 442                                 } else {
 443                                         if (elType) {
 444                                                 switch (elType->basetype) {
 445                                                         case SMI_BASETYPE_BITS:
 446                                                         case SMI_BASETYPE_OCTETSTRING: {
 447                                                                 k->key_type = OID_KEY_TYPE_BYTES;
 448                                                                 k->num_subids = non_implicit_size;
 449                                                                 break;
 450                                                         }
 451                                                         case SMI_BASETYPE_ENUM:
 452                                                         case SMI_BASETYPE_OBJECTIDENTIFIER:
 453                                                         case SMI_BASETYPE_INTEGER32:
 454                                                         case SMI_BASETYPE_UNSIGNED32:
 455                                                         case SMI_BASETYPE_INTEGER64:
 456                                                         case SMI_BASETYPE_UNSIGNED64:
 457                                                                 k->key_type = OID_KEY_TYPE_INTEGER;
 458                                                                 k->num_subids = 1;
 459                                                                 break;
 460                                                         default:
 461                                                                 k->key_type = OID_KEY_TYPE_WRONG;
 462                                                                 k->num_subids = 0;
 463                                                                 break;
 464                                                 }
 465                                         } else {
 466                                                 k->key_type = OID_KEY_TYPE_WRONG;
 467                                                 k->num_subids = 0;
 468                                                 break;
 469                                         }
 470                                 }
 471
 472                                 if (!*key_p) *key_p = k;
 473                                 if (kl) kl->next = k;
 474
 475                                 kl = k;
 476                         }
 477
 478                         if (implied && kl) {
 479                                 switch (kl->key_type) {
 480                                         case OID_KEY_TYPE_BYTES:  kl->key_type = OID_KEY_TYPE_IMPLIED_BYTES; break;
 481                                         case OID_KEY_TYPE_STRING: kl->key_type = OID_KEY_TYPE_IMPLIED_STRING; break;
 482                                         case OID_KEY_TYPE_OID:    kl->key_type = OID_KEY_TYPE_IMPLIED_OID; break;
 483                                         default: break;
 484                                 }
 485                         }
 486
 487                         return OID_KIND_ROW;
 488                 }
 489                 case SMI_NODEKIND_NODE: return OID_KIND_NODE;
 490                 case SMI_NODEKIND_SCALAR: return OID_KIND_SCALAR;
 491                 case SMI_NODEKIND_TABLE: return OID_KIND_TABLE;
 492                 case SMI_NODEKIND_COLUMN: return OID_KIND_COLUMN;
 493                 case SMI_NODEKIND_NOTIFICATION: return OID_KIND_NOTIFICATION;
 494                 case SMI_NODEKIND_GROUP: return OID_KIND_GROUP;
 495                 case SMI_NODEKIND_COMPLIANCE: return OID_KIND_COMPLIANCE;
 496                 case SMI_NODEKIND_CAPABILITIES: return OID_KIND_CAPABILITIES;
 497                 default: return OID_KIND_UNKNOWN;
 498         }
 499 }
 500
 501 #define IS_ENUMABLE(ft) ( (ft == FT_UINT8) || (ft == FT_UINT16) || (ft == FT_UINT24) || (ft == FT_UINT32) \
 502                                                    || (ft == FT_INT8) || (ft == FT_INT16) || (ft == FT_INT24) || (ft == FT_INT32) \
 503                                                    || (ft == FT_UINT64) || (ft == FT_INT64) )
 504
 505 static void unregister_mibs(void) {
 506         /* TODO: Unregister "MIBs" proto and clean up field array and subtree array.
 507          * Wireshark does not support that yet. :-( */
 508
 509         /* smiExit(); */
 510 }
 511
 512 static void restart_needed_warning(void) {
 513         if (oids_init_done)
 514                 report_failure("Wireshark needs to be restarted for these changes to take effect");
 515 }
 516
 517 static void register_mibs(void) {
 518         SmiModule *smiModule;
 519         SmiNode *smiNode;
 520         guint i;
 521         int proto_mibs = -1;
 522         wmem_array_t* hfa;
 523         GArray* etta;
 524         gchar* path_str;
 525
 526         if (!load_smi_modules) {
 527                 D(1,("OID resolution not enabled"));
 528                 return;
 529         }
 530
 531         /* TODO: Remove this workaround when unregistration of "MIBs" proto is solved.
 532          * Wireshark does not support that yet. :-( */
 533         if (oids_init_done) {
 534                 D(1,("Exiting register_mibs() to avoid double registration of MIBs proto."));
 535                 return;
 536         } else {
 537                 oids_init_done = TRUE;
 538         }
 539
 540         hfa = wmem_array_new(wmem_epan_scope(), sizeof(hf_register_info));
 541         etta = g_array_new(FALSE,TRUE,sizeof(gint*));
 542
 543         smiInit(NULL);
 544
 545         smi_errors = g_string_new("");
 546         smiSetErrorHandler(smi_error_handler);
 547
 548         path_str = oid_get_default_mib_path();
 549         D(1,("SMI Path: '%s'",path_str));
 550
 551         smiSetPath(path_str);
 552
 553         for(i=0;i<num_smi_modules;i++) {
 554                 if (!smi_modules[i].name) continue;
 555
 556                 if (smiIsLoaded(smi_modules[i].name)) {
 557                         continue;
 558                 } else {
 559                         char* mod_name =  smiLoadModule(smi_modules[i].name);
 560                         if (mod_name)
 561                                 D(2,("Loaded: '%s'[%d] as %s",smi_modules[i].name,i,mod_name ));
 562                         else
 563                                 D(1,("Failed to load: '%s'[%d]",smi_modules[i].name,i));
 564                 }
 565         }
 566
 567         if (smi_errors->len) {
 568                 if (!suppress_smi_errors) {
 569                         report_failure("The following errors were found while loading the MIBS:\n%s\n\n"
 570                                            "The Current Path is: %s\n\nYou can avoid this error message "
 571                                            "by removing the missing MIB modules at Edit -> Preferences"
 572                                            " -> Name Resolution -> SMI (MIB and PIB) modules or by "
 573                                            "installing them.\n" , smi_errors->str , path_str);
 574                 }
 575                 D(1,("Errors while loading:\n%s\n",smi_errors->str));
 576         }
 577
 578         g_free(path_str);
 579         g_string_free(smi_errors,TRUE);
 580
 581         for (smiModule = smiGetFirstModule();
 582                  smiModule;
 583                  smiModule = smiGetNextModule(smiModule)) {
 584
 585                 D(3,("\tModule: %s", smiModule->name));
 586
 587                 /* TODO: Check libsmi version at compile time and disable this
 588                  * workaround for libsmi versions where this problem is fixed.
 589                  * Currently there is no such version. :-(
 590                  */
 591                 if (smiModule->conformance == 1) {
 592                         if (!suppress_smi_errors) {
 593                                 report_failure("Stopped processing module %s due to "
 594                                         "error(s) to prevent potential crash in libsmi.\n"
 595                                         "Module's conformance level: %d.\n"
 596                                         "See details at: http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=560325\n",
 597                                          smiModule->name, smiModule->conformance);
 598                         }
 599                         continue;
 600                 }
 601                 for (smiNode = smiGetFirstNode(smiModule, SMI_NODEKIND_ANY);
 602                          smiNode;
 603                          smiNode = smiGetNextNode(smiNode, SMI_NODEKIND_ANY)) {
 604
 605                         SmiType* smiType =  smiGetNodeType(smiNode);
 606                         const oid_value_type_t* typedata =  get_typedata(smiType);
 607                         oid_key_t* key;
 608                         oid_kind_t kind = smikind(smiNode,&key);
 609                         char *oid = smiRenderOID(smiNode->oidlen, smiNode->oid, SMI_RENDER_QUALIFIED);
 610                         oid_info_t* oid_data = add_oid(oid,
 611                                                        kind,
 612                                                        typedata,
 613                                                        key,
 614                                                        smiNode->oidlen,
 615                                                        smiNode->oid);
 616                         smi_free (oid);
 617
 618                         D(4,("\t\tNode: kind=%d oid=%s name=%s ",
 619                                  oid_data->kind, oid_subid2string(smiNode->oid, smiNode->oidlen), oid_data->name ));
 620
 621                         if ( typedata && oid_data->value_hfid == -2 ) {
 622                                 SmiNamedNumber* smiEnum;
 623                                 hf_register_info hf = { &(oid_data->value_hfid), {
 624                                         oid_data->name,
 625                                         alnumerize(oid_data->name),
 626                                         typedata->ft_type,
 627                                         typedata->display,
 628                                         NULL,
 629                                         0,
 630                                         smiRenderOID(smiNode->oidlen, smiNode->oid, SMI_RENDER_ALL),
 631                                         HFILL }};
 632
 633                                 /* Don't allow duplicate blurb/name */
 634                                 if (strcmp(hf.hfinfo.blurb, hf.hfinfo.name) == 0) {
 635                                         smi_free((void *) hf.hfinfo.blurb);
 636                                         hf.hfinfo.blurb = NULL;
 637                                 }
 638
 639                                 oid_data->value_hfid = -1;
 640
 641                                 if ( IS_ENUMABLE(hf.hfinfo.type) && (smiEnum = smiGetFirstNamedNumber(smiType))) {
 642                                         GArray* vals = g_array_new(TRUE,TRUE,sizeof(value_string));
 643
 644                                         for(;smiEnum; smiEnum = smiGetNextNamedNumber(smiEnum)) {
 645                                                 if (smiEnum->name) {
 646                                                         value_string val = {(guint32)smiEnum->value.value.integer32,g_strdup(smiEnum->name)};
 647                                                         g_array_append_val(vals,val);
 648                                                 }
 649                                         }
 650
 651                                         hf.hfinfo.strings = vals->data;
 652                                         g_array_free(vals,FALSE);
 653                                 }
 654 #if 0 /* packet-snmp does not handle bits yet */
 655                         } else if (smiType->basetype == SMI_BASETYPE_BITS && ( smiEnum = smiGetFirstNamedNumber(smiType) )) {
 656                                 guint n = 0;
 657                                 oid_bits_info_t* bits = g_malloc(sizeof(oid_bits_info_t));
 658                                 gint* ettp = &(bits->ett);
 659
 660                                 bits->num = 0;
 661                                 bits->ett = -1;
 662
 663                                 g_array_append_val(etta,ettp);
 664
 665                                 for(;smiEnum; smiEnum = smiGetNextNamedNumber(smiEnum), bits->num++);
 666
 667                                 bits->data = g_malloc(sizeof(struct _oid_bit_t)*bits->num);
 668
 669                                 for(smiEnum = smiGetFirstNamedNumber(smiType),n=0;
 670                                         smiEnum;
 671                                         smiEnum = smiGetNextNamedNumber(smiEnum),n++) {
 672                                         guint mask = 1 << (smiEnum->value.value.integer32 % 8);
 673                                         char* base = alnumerize(oid_data->name);
 674                                         char* ext = alnumerize(smiEnum->name);
 675                                         hf_register_info hf2 = { &(bits->data[n].hfid), { NULL, NULL, FT_UINT8, BASE_HEX, NULL, mask, NULL, HFILL }};
 676
 677                                         bits->data[n].hfid = -1;
 678                                         bits->data[n].offset = smiEnum->value.value.integer32 / 8;
 679
 680                                         hf2.hfinfo.name = g_strdup_printf("%s:%s",oid_data->name,smiEnum->name);
 681                                         hf2.hfinfo.abbrev = g_strdup_printf("%s.%s",base,ext);
 682
 683                                         g_free(base);
 684                                         g_free(ext);
 685                                         g_array_append_val(hfa,hf2);
 686                                 }
 687 #endif /* packet-snmp does not use this yet */
 688                                 wmem_array_append_one(hfa,hf);
 689                         }
 690
 691                         if ((key = oid_data->key)) {
 692                                 for(; key; key = key->next) {
 693                                         hf_register_info hf = { &(key->hfid), {
 694                                                 key->name,
 695                                                 alnumerize(key->name),
 696                                                 key->ft_type,
 697                                                 key->display,
 698                                                 NULL,
 699                                                 0,
 700                                                 NULL,
 701                                                 HFILL }};
 702
 703                                         D(5,("\t\t\tIndex: name=%s subids=%d key_type=%d",
 704                                                  key->name, key->num_subids, key->key_type ));
 705
 706                                         if (key->hfid == -2) {
 707                                                 wmem_array_append_one(hfa,hf);
 708                                                 key->hfid = -1;
 709                                         } else {
 710                                                 g_free((void*)hf.hfinfo.abbrev);
 711                                         }
 712                                 }
 713                         }
 714                 }
 715         }
 716
 717         proto_mibs = proto_register_protocol("MIBs", "MIBS", "mibs");
 718
 719         proto_register_field_array(proto_mibs, (hf_register_info*)wmem_array_get_raw(hfa), wmem_array_get_count(hfa));
 720
 721         proto_register_subtree_array((gint**)(void*)etta->data, etta->len);
 722
 723         g_array_free(etta,TRUE);
 724 }
 725 #endif
 726
 727 void oid_pref_init(module_t *nameres)
 728 {
 729 #ifdef HAVE_LIBSMI
 730         static uat_field_t smi_fields[] = {
 731                 UAT_FLD_CSTRING(smi_mod,name,"Module name","The module's name"),
 732                 UAT_END_FIELDS
 733         };
 734         static uat_field_t smi_paths_fields[] = {
 735                 UAT_FLD_DIRECTORYNAME(smi_mod,name,"Directory path","The directory name"),
 736                 UAT_END_FIELDS
 737         };
 738
 739     prefs_register_bool_preference(nameres, "load_smi_modules",
 740                                   "Enable OID resolution",
 741                                   "You must restart Wireshark for this change to take effect",
 742                                   &load_smi_modules);
 743
 744     prefs_register_bool_preference(nameres, "suppress_smi_errors",
 745                                   "Suppress SMI errors",
 746                                   "Some errors can be ignored. If unsure, set to false.",
 747                                   &suppress_smi_errors);
 748
 749     smi_paths_uat = uat_new("SMI Paths",
 750                             sizeof(smi_module_t),
 751                             "smi_paths",
 752                             FALSE,
 753                             (void**)&smi_paths,
 754                             &num_smi_paths,
 755     /* affects dissection of packets (as the MIBs and PIBs affect the
 756        interpretation of e.g. SNMP variable bindings), but not set of
 757        named fields
 758
 759        XXX - if named fields are generated from the MIBs and PIBs
 760        for particular variable bindings, this *does* affect the set
 761        of named fields! */
 762                             UAT_AFFECTS_DISSECTION,
 763                             "ChSNMPSMIPaths",
 764                             smi_mod_copy_cb,
 765                             NULL,
 766                             smi_mod_free_cb,
 767                             restart_needed_warning,
 768                             smi_paths_fields);
 769
 770     prefs_register_uat_preference(nameres,
 771                                   "smi_paths",
 772                                   "SMI (MIB and PIB) paths",
 773                                   "Search paths for SMI (MIB and PIB) modules. You must\n"
 774                                   "restart Wireshark for these changes to take effect.",
 775                                   smi_paths_uat);
 776
 777     smi_modules_uat = uat_new("SMI Modules",
 778                               sizeof(smi_module_t),
 779                               "smi_modules",
 780                               FALSE,
 781                               (void**)&smi_modules,
 782                               &num_smi_modules,
 783     /* affects dissection of packets (as the MIBs and PIBs affect the
 784        interpretation of e.g. SNMP variable bindings), but not set of
 785        named fields
 786
 787        XXX - if named fields are generated from the MIBs and PIBs
 788        for particular variable bindings, would this affect the set
 789        of named fields? */
 790                               UAT_AFFECTS_DISSECTION,
 791                               "ChSNMPSMIModules",
 792                               smi_mod_copy_cb,
 793                               NULL,
 794                               smi_mod_free_cb,
 795                               restart_needed_warning,
 796                               smi_fields);
 797
 798     prefs_register_uat_preference(nameres,
 799                                   "smi_modules",
 800                                   "SMI (MIB and PIB) modules",
 801                                   "List of enabled SMI (MIB and PIB) modules. You must\n"
 802                                   "restart Wireshark for these changes to take effect.",
 803                                   smi_modules_uat);
 804
 805 #else
 806     prefs_register_static_text_preference(nameres, "load_smi_modules_static",
 807                             "Enable OID resolution: N/A",
 808                             "Support for OID resolution was not compiled into this version of Wireshark");
 809
 810     prefs_register_static_text_preference(nameres, "suppress_smi_errors_static",
 811                             "Suppress SMI errors: N/A",
 812                             "Support for OID resolution was not compiled into this version of Wireshark");
 813
 814     prefs_register_static_text_preference(nameres, "smi_module_path",
 815                             "SMI (MIB and PIB) modules and paths: N/A",
 816                             "Support for OID resolution was not compiled into this version of Wireshark");
 817 #endif
 818 }
 819
 820 void oids_init(void) {
 821         prepopulate_oids();
 822 #ifdef HAVE_LIBSMI
 823         register_mibs();
 824 #else
 825         D(1,("libsmi disabled oid resolution not enabled"));
 826 #endif
 827 }
 828
 829 void oids_cleanup(void) {
 830 #ifdef HAVE_LIBSMI
 831         unregister_mibs();
 832 #else
 833         D(1,("libsmi disabled oid resolution not enabled"));
 834 #endif
 835 }
 836
 837 const char* oid_subid2string(guint32* subids, guint len) {
 838     return rel_oid_subid2string(subids, len, TRUE);
 839 }
 840 const char* rel_oid_subid2string(guint32* subids, guint len, gboolean is_absolute) {
 841         char *s, *w;
 842
 843         if(!subids || len == 0)
 844                 return "*** Empty OID ***";
 845
 846         s = (char *)ep_alloc0(((len)*11)+2);
 847         w = s;
 848
 849         if (!is_absolute)
 850                 *w++ = '.';
 851
 852         do {
 853                 w += g_snprintf(w,12,"%u.",*subids++);
 854         } while(--len);
 855
 856         if (w!=s) *(w-1) = '\0'; else *(s) = '\0';
 857
 858         return s;
 859 }
 860
 861 static guint check_num_oid(const char* str) {
 862         const char* r = str;
 863         char c = '.';
 864         guint n = 0;
 865
 866         D(8,("check_num_oid: '%s'",str));
 867         if (!r) return 0;
 868
 869         do {
 870                 D(9,("\tcheck_num_oid: '%c' %d",*r,n));
 871                 switch(*r) {
 872             case '.': case '\0':
 873                                 n++;
 874                                 if (c == '.') return 0;
 875                                 break;
 876                         case '1' : case '2' : case '3' : case '4' : case '5' :
 877                         case '6' : case '7' : case '8' : case '9' : case '0' :
 878                                 continue;
 879                         default:
 880                                 return 0;
 881                 }
 882         } while((c = *r++));
 883
 884         return n;
 885 }
 886
 887 guint oid_string2subid(const char* str, guint32** subids_p) {
 888         const char* r = str;
 889         guint32* subids;
 890         guint32* subids_overflow;
 891         guint n = check_num_oid(str);
 892         /*
 893          * we cannot handle sub-ids greater than 32bytes
 894          * keep a pilot subid of 64 bytes to check the limit
 895          */
 896         guint64 subid = 0;
 897
 898         D(6,("oid_string2subid: str='%s'",str));
 899
 900         if (!n) {
 901                 *subids_p = NULL;
 902                 return 0;
 903         }
 904
 905         *subids_p = subids = (guint32 *)ep_alloc0(sizeof(guint32)*n);
 906         subids_overflow = subids + n;
 907         do switch(*r) {
 908                 case '.':
 909                         subid = 0;
 910                         subids++;
 911                         continue;
 912                 case '1' : case '2' : case '3' : case '4' : case '5' :
 913                 case '6' : case '7' : case '8' : case '9' : case '0' :
 914                         subid *= 10;
 915                         subid += *r - '0';
 916
 917                         if( subids >= subids_overflow ||  subid > 0xffffffff) {
 918                                 *subids_p=NULL;
 919                                 return 0;
 920                         }
 921
 922                         *(subids) *= 10;
 923                         *(subids) += *r - '0';
 924                         continue;
 925                 case '\0':
 926                         break;
 927                 default:
 928                         return 0;
 929         } while(*r++);
 930
 931         return n;
 932 }
 933
 934
 935 guint oid_encoded2subid(const guint8 *oid_bytes, gint oid_len, guint32** subids_p) {
 936         return oid_encoded2subid_sub(oid_bytes, oid_len, subids_p, TRUE);
 937 }
 938 guint oid_encoded2subid_sub(const guint8 *oid_bytes, gint oid_len, guint32** subids_p,
 939                 gboolean is_first) {
 940         gint i;
 941         guint n = is_first ? 1 : 0;
 942         guint32* subids;
 943         guint32* subid_overflow;
 944         /*
 945          * we cannot handle sub-ids greater than 32bytes
 946          * have the subid in 64 bytes to be able to check the limit
 947          */
 948         guint64 subid = 0;
 949
 950         for (i=0; i<oid_len; i++) { if (! (oid_bytes[i] & 0x80 )) n++; }
 951
 952         *subids_p = subids = (guint32 *)ep_alloc(sizeof(guint32)*n);
 953         subid_overflow = subids+n;
 954
 955         /* If n is 0 or 1 (depending on how it was initialized) then we found
 956          * no bytes in the OID with first bit cleared, so initialize our one
 957          * byte (if any) to zero and return. This *seems* to be the right thing
 958          * to do in this situation, and at the very least it avoids
 959          * uninitialized memory errors that would otherwise occur. */
 960         if (is_first && n == 1) {
 961                 *subids = 0;
 962                 return n;
 963         }
 964         else if (!is_first && n == 0) {
 965                 return n;
 966         }
 967
 968         for (i=0; i<oid_len; i++){
 969                 guint8 byte = oid_bytes[i];
 970
 971                 subid <<= 7;
 972                 subid |= byte & 0x7F;
 973
 974                 if (byte & 0x80) {
 975                         continue;
 976                 }
 977
 978                 if (is_first) {
 979                         guint32 subid0 = 0;
 980
 981                         if (subid >= 40) { subid0++; subid-=40; }
 982                         if (subid >= 40) { subid0++; subid-=40; }
 983
 984                         *subids++ = subid0;
 985
 986                         is_first = FALSE;
 987                 }
 988
 989                 if( subids >= subid_overflow || subid > 0xffffffff) {
 990                         *subids_p=NULL;
 991                         return 0;
 992                 }
 993
 994                 *subids++ = (guint32)subid;
 995                 subid = 0;
 996         }
 997
 998         g_assert(subids == subid_overflow);
 999
1000         return n;
1001 }
1002
1003 oid_info_t* oid_get(guint len, guint32* subids, guint* matched, guint* left) {
1004         oid_info_t* curr_oid = &oid_root;
1005         guint i;
1006
1007         if(!(subids && *subids <= 2)) {
1008                 *matched = 0;
1009                 *left = len;
1010                 return curr_oid;
1011         }
1012
1013         for( i=0; i < len; i++) {
1014                 oid_info_t* next_oid = (oid_info_t *)wmem_tree_lookup32(curr_oid->children,subids[i]);
1015                 if (next_oid) {
1016                         curr_oid = next_oid;
1017                 } else {
1018                         goto done;
1019                 }
1020         }
1021 done:
1022         *matched = i;
1023         *left = len - i;
1024         return curr_oid;
1025 }
1026
1027
1028 oid_info_t* oid_get_from_encoded(const guint8 *bytes, gint byteslen, guint32** subids_p, guint* matched_p, guint* left_p) {
1029         guint subids_len = oid_encoded2subid(bytes, byteslen, subids_p);
1030         return oid_get(subids_len, *subids_p, matched_p, left_p);
1031 }
1032
1033 oid_info_t* oid_get_from_string(const gchar *oid_str, guint32** subids_p, guint* matched, guint* left) {
1034         guint subids_len = oid_string2subid(oid_str, subids_p);
1035         return oid_get(subids_len, *subids_p, matched, left);
1036 }
1037
1038 const gchar *oid_resolved_from_encoded(const guint8 *oid, gint oid_len) {
1039         guint32 *subid_oid;
1040         guint subid_oid_length = oid_encoded2subid(oid, oid_len, &subid_oid);
1041
1042         return oid_resolved(subid_oid_length, subid_oid);
1043 }
1044
1045 const gchar *rel_oid_resolved_from_encoded(const guint8 *oid, gint oid_len) {
1046         guint32 *subid_oid;
1047         guint subid_oid_length = oid_encoded2subid_sub(oid, oid_len, &subid_oid, FALSE);
1048
1049         return rel_oid_subid2string(subid_oid, subid_oid_length, FALSE);
1050 }
1051
1052
1053 guint oid_subid2encoded(guint subids_len, guint32* subids, guint8** bytes_p) {
1054         guint bytelen = 0;
1055         guint i;
1056         guint32 subid;
1057         guint8* b;
1058
1059         if ( !subids || subids_len <= 1) {
1060                 *bytes_p = NULL;
1061                 return 0;
1062         }
1063
1064         for (subid=subids[0] * 40, i = 1; i<subids_len; i++, subid=0) {
1065                 subid += subids[i];
1066                 if (subid <= 0x0000007F) {
1067                         bytelen += 1;
1068                 } else if (subid <= 0x00003FFF ) {
1069                         bytelen += 2;
1070                 } else if (subid <= 0x001FFFFF ) {
1071                         bytelen += 3;
1072                 } else if (subid <= 0x0FFFFFFF ) {
1073                         bytelen += 4;
1074                 } else {
1075                         bytelen += 5;
1076                 }
1077         }
1078
1079         *bytes_p = b = (guint8 *)ep_alloc(bytelen);
1080
1081         for (subid=subids[0] * 40, i = 1; i<subids_len; i++, subid=0) {
1082                 guint len;
1083
1084                 subid += subids[i];
1085                 if ((subid <= 0x0000007F )) len = 1;
1086                 else if ((subid <= 0x00003FFF )) len = 2;
1087                 else if ((subid <= 0x001FFFFF )) len = 3;
1088                 else if ((subid <= 0x0FFFFFFF )) len = 4;
1089                 else len = 5;
1090
1091                 switch(len) {
1092                         default: *bytes_p=NULL; return 0;
1093                         case 5: *(b++) = ((subid & 0xF0000000) >> 28) | 0x80;
1094                         case 4: *(b++) = ((subid & 0x0FE00000) >> 21) | 0x80;
1095                         case 3: *(b++) = ((subid & 0x001FC000) >> 14) | 0x80;
1096                         case 2: *(b++) = ((subid & 0x00003F80) >> 7)  | 0x80;
1097                         case 1: *(b++) =   subid & 0x0000007F ; break;
1098                 }
1099         }
1100
1101         return bytelen;
1102 }
1103
1104 const gchar* oid_encoded2string(const guint8* encoded, guint len) {
1105         guint32* subids;
1106         guint subids_len = oid_encoded2subid(encoded, len, &subids);
1107
1108         if (subids_len) {
1109                 return oid_subid2string(subids,subids_len);
1110         } else {
1111                 return "";
1112         }
1113 }
1114
1115 const gchar* rel_oid_encoded2string(const guint8* encoded, guint len) {
1116         guint32* subids;
1117         guint subids_len = oid_encoded2subid_sub(encoded, len, &subids, FALSE);
1118
1119         if (subids_len) {
1120                 return rel_oid_subid2string(subids,subids_len, FALSE);
1121         } else {
1122                 return "";
1123         }
1124 }
1125
1126 guint oid_string2encoded(const char *oid_str, guint8 **bytes) {
1127         guint32* subids;
1128         guint32 subids_len;
1129         guint byteslen;
1130
1131                 if ( ( subids_len = oid_string2subid(oid_str, &subids) )
1132                          &&
1133                          ( byteslen = oid_subid2encoded(subids_len, subids, bytes) )  ) {
1134                         return byteslen;
1135                 }
1136         return 0;
1137 }
1138
1139 const gchar *oid_resolved_from_string(const gchar *oid_str) {
1140         guint32 *subid_oid;
1141         guint subid_oid_length = oid_string2subid(oid_str, &subid_oid);
1142
1143         return oid_resolved(subid_oid_length, subid_oid);
1144 }
1145
1146 const gchar *oid_resolved(guint32 num_subids, guint32* subids) {
1147         guint matched;
1148         guint left;
1149         oid_info_t* oid;
1150
1151         if(! (subids && *subids <= 2 ))
1152                 return "*** Malformed OID ***";
1153
1154         oid = oid_get(num_subids, subids, &matched, &left);
1155
1156         while (! oid->name ) {
1157                 if (!(oid = oid->parent)) {
1158                         return oid_subid2string(subids,num_subids);
1159                 }
1160                 left++;
1161                 matched--;
1162         }
1163
1164         if (left) {
1165                 return ep_strdup_printf("%s.%s",
1166                                         oid->name ? oid->name : oid_subid2string(subids,matched),
1167                                         oid_subid2string(&(subids[matched]),left));
1168         } else {
1169                 return oid->name ? oid->name : oid_subid2string(subids,matched);
1170         }
1171 }
1172
1173 extern void oid_both(guint oid_len, guint32 *subids, char** resolved_p, char** numeric_p) {
1174         *resolved_p = (char *)oid_resolved(oid_len,subids);
1175         *numeric_p = (char *)oid_subid2string(subids,oid_len);
1176 }
1177
1178 extern void oid_both_from_encoded(const guint8 *oid, gint oid_len, char** resolved_p, char** numeric_p) {
1179         guint32* subids;
1180         guint subids_len = oid_encoded2subid(oid, oid_len, &subids);
1181         *resolved_p = (char *)oid_resolved(subids_len,subids);
1182         *numeric_p = (char *)oid_subid2string(subids,subids_len);
1183 }
1184
1185 extern void oid_both_from_string(const gchar *oid_str, char** resolved_p, char** numeric_p) {
1186         guint32* subids;
1187         guint subids_len = oid_string2subid(oid_str, &subids);
1188         *resolved_p = (char *)oid_resolved(subids_len,subids);
1189         *numeric_p = (char *)oid_subid2string(subids,subids_len);
1190 }
1191
1192 /**
1193  * Fetch the default OID path.
1194  */
1195 extern gchar *
1196 oid_get_default_mib_path(void) {
1197 #ifdef HAVE_LIBSMI
1198         GString* path_str;
1199         gchar *path_ret;
1200         char *path;
1201         guint i;
1202
1203         path_str = g_string_new("");
1204
1205         if (!load_smi_modules) {
1206                 D(1,("OID resolution not enabled"));
1207                 return path_str->str;
1208         }
1209 #ifdef _WIN32
1210 #define PATH_SEPARATOR ";"
1211         path = get_datafile_path("snmp\\mibs");
1212         g_string_append_printf(path_str, "%s;", path);
1213         g_free (path);
1214
1215         path = get_persconffile_path("snmp\\mibs", FALSE);
1216         g_string_append_printf(path_str, "%s", path);
1217         g_free (path);
1218 #else
1219 #define PATH_SEPARATOR ":"
1220         path = smiGetPath();
1221         g_string_append(path_str, "/usr/share/snmp/mibs");
1222         if (strlen(path) > 0 ) {
1223                 g_string_append(path_str, PATH_SEPARATOR);
1224         }
1225         g_string_append_printf(path_str, "%s", path);
1226         free (path);
1227 #endif
1228
1229         for(i=0;i<num_smi_paths;i++) {
1230                 if (!( smi_paths[i].name && *smi_paths[i].name))
1231                         continue;
1232
1233                 g_string_append_printf(path_str,PATH_SEPARATOR "%s",smi_paths[i].name);
1234         }
1235
1236         path_ret = path_str->str;
1237         g_string_free(path_str, FALSE);
1238         return path_ret;
1239 #else /* HAVE_LIBSMI */
1240         return g_strdup("");
1241 #endif
1242 }
1243
1244 #ifdef DEBUG_OIDS
1245 char* oid_test_a2b(guint32 num_subids, guint32* subids) {
1246         guint8* sub2enc;
1247         guint8* str2enc;
1248         guint32* enc2sub;
1249         guint32* str2sub;
1250         const char* sub2str = oid_subid2string(subids, num_subids);
1251         guint sub2enc_len = oid_subid2encoded(num_subids, subids,&sub2enc);
1252         guint enc2sub_len = oid_encoded2subid(sub2enc, sub2enc_len, &enc2sub);
1253         const char* enc2str = oid_encoded2string(sub2enc, sub2enc_len);
1254         guint str2enc_len = oid_string2encoded(sub2str,&str2enc);
1255         guint str2sub_len = oid_string2subid(sub2str,&str2sub);
1256
1257         return ep_strdup_printf(
1258                                                         "oid_subid2string=%s \n"
1259                                                         "oid_subid2encoded=[%d]%s \n"
1260                                                         "oid_encoded2subid=%s \n "
1261                                                         "oid_encoded2string=%s \n"
1262                                                         "oid_string2encoded=[%d]%s \n"
1263                                                         "oid_string2subid=%s \n "
1264                                                         ,sub2str
1265                                                         ,sub2enc_len,bytestring_to_str(sub2enc, sub2enc_len, ':')
1266                                                         ,enc2sub ? oid_subid2string(enc2sub,enc2sub_len) : "-"
1267                                                         ,enc2str
1268                                                         ,str2enc_len,bytestring_to_str(str2enc, str2enc_len, ':')
1269                                                         ,str2sub ? oid_subid2string(str2sub,str2sub_len) : "-"
1270                                                         );
1271 }
1272
1273 void add_oid_debug_subtree(oid_info_t* oid_info, proto_tree *tree) {
1274         static const char* oid_kinds[] = { "Unknown", "Node", "Scalar", "Table", "Row", "Column", "Notification", "Group", "Compliance", "Capabilities"};
1275         static const char* key_types[] = {"OID_KEY_TYPE_WRONG","OID_KEY_TYPE_INTEGER",
1276                                                                                 "OID_KEY_TYPE_FIXED_STRING","OID_KEY_TYPE_FIXED_BYTES","OID_KEY_TYPE_STRING",
1277                                                                                 "OID_KEY_TYPE_BYTES","OID_KEY_TYPE_NSAP","OID_KEY_TYPE_OID","OID_KEY_TYPE_IPADDR"};
1278         proto_item* pi = proto_tree_add_text(tree,NULL,0,0,
1279         "OidInfo: Name='%s' sub-id=%u  kind=%s  hfid=%d",
1280         oid_info->name ? oid_info->name : "",
1281         oid_info->subid,
1282         oid_info->kind <= OID_KIND_CAPABILITIES ? oid_kinds[oid_info->kind] : "BROKEN",
1283         oid_info->value_hfid);
1284         proto_tree* pt = proto_item_add_subtree(pi,0);
1285         oid_key_t* key;
1286
1287         for(key = oid_info->key; key; key = key->next) {
1288                 proto_tree_add_text(pt,NULL,0,0,
1289                 "Key: name='%s' num_subids=%d type=%s",
1290                 key->name,
1291                 key->key_type <= OID_KEY_TYPE_IPADDR ? key_types[key->key_type] : "BROKEN"
1292                 );
1293         };
1294
1295         if (oid_info->parent) {
1296                 pi = proto_tree_add_text(pt,NULL,0,0,"Parent:");
1297                 pt = proto_item_add_subtree(pi,0);
1298                 add_oid_debug_subtree(oid_info->parent, pt);
1299         }
1300 }
1301 #endif
1302
1303 /*
1304  * Editor modelines
1305  *
1306  * Local Variables:
1307  * c-basic-offset: 8
1308  * tab-width: 8
1309  * indent-tabs-mode: t
1310  * End:
1311  *
1312  * ex: set shiftwidth=8 tabstop=8 noexpandtab:
1313  * :indentSize=8:tabSize=8:noTabs=false:
1314  */
1315