2 * Routines for SNMP (simple network management protocol)
3 * Copyright (C) 1998 Didier Jorand
5 * See RFC 1157 for SNMPv1.
7 * See RFCs 1901, 1905, and 1906 for SNMPv2c.
9 * See RFCs 1905, 1906, 1909, and 1910 for SNMPv2u [historic].
11 * See RFCs 2570-2576 for SNMPv3
12 * Updated to use the asn2wrs compiler made by Tomas Kukosa
13 * Copyright (C) 2005 - 2006 Anders Broman [AT] ericsson.com
15 * See RFC 3414 for User-based Security Model for SNMPv3
16 * See RFC 3826 for (AES) Cipher Algorithm in the SNMP USM
17 * See RFC 2578 for Structure of Management Information Version 2 (SMIv2)
18 * Copyright (C) 2007 Luis E. Garcia Ontanon <luis@ontanon.org>
22 * Wireshark - Network traffic analyzer
23 * By Gerald Combs <gerald@wireshark.org>
24 * Copyright 1998 Gerald Combs
28 * GXSNMP -- An snmp mangament application
29 * Copyright (C) 1998 Gregory McLean & Jochen Friedrich
30 * Beholder RMON ethernet network monitor,Copyright (C) 1993 DNPAP group
32 * This program is free software; you can redistribute it and/or
33 * modify it under the terms of the GNU General Public License
34 * as published by the Free Software Foundation; either version 2
35 * of the License, or (at your option) any later version.
37 * This program is distributed in the hope that it will be useful,
38 * but WITHOUT ANY WARRANTY; without even the implied warranty of
39 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
40 * GNU General Public License for more details.
42 * You should have received a copy of the GNU General Public License
43 * along with this program; if not, write to the Free Software
44 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
47 #define D(args) do {printf args; fflush(stdout); } while(0)
59 #include <epan/packet.h>
60 #include <epan/strutil.h>
61 #include <epan/conversation.h>
62 #include <epan/etypes.h>
63 #include <epan/prefs.h>
64 #include <epan/sminmpec.h>
65 #include <epan/emem.h>
66 #include <epan/next_tvb.h>
68 #include <epan/asn1.h>
69 #include "packet-ipx.h"
70 #include "packet-hpext.h"
73 #include "packet-ber.h"
75 #include "packet-snmp.h"
77 #include <epan/crypt/crypt-sha1.h>
78 #include <epan/crypt/crypt-md5.h>
79 #include <epan/expert.h>
80 #include <epan/report_err.h>
81 #include <epan/oids.h>
86 #include <winposixtype.h>
91 /* Take a pointer that may be null and return a pointer that's not null
92 by turning null pointers into pointers to the above null string,
93 and, if the argument pointer wasn't null, make sure we handle
94 non-printable characters in the string by escaping them. */
95 #define SAFE_STRING(s, l) (((s) != NULL) ? format_text((s), (l)) : "")
97 #define PNAME "Simple Network Management Protocol"
101 #define UDP_PORT_SNMP 161
102 #define UDP_PORT_SNMP_TRAP 162
103 #define TCP_PORT_SNMP 161
104 #define TCP_PORT_SNMP_TRAP 162
105 #define TCP_PORT_SMUX 199
106 #define UDP_PORT_SNMP_PATROL 8161
108 /* Initialize the protocol and registered fields */
109 static int proto_snmp = -1;
110 static int proto_smux = -1;
112 static gboolean display_oid = TRUE;
113 static gboolean snmp_var_in_tree = TRUE;
115 static gboolean snmp_usm_auth_md5(snmp_usm_params_t* p, guint8**, guint*, gchar const**);
116 static gboolean snmp_usm_auth_sha1(snmp_usm_params_t* p, guint8**, guint*, gchar const**);
118 static tvbuff_t* snmp_usm_priv_des(snmp_usm_params_t*, tvbuff_t*, gchar const**);
119 static tvbuff_t* snmp_usm_priv_aes(snmp_usm_params_t*, tvbuff_t*, gchar const**);
122 static void snmp_usm_password_to_key_md5(const guint8 *password, guint passwordlen, const guint8 *engineID, guint engineLength, guint8 *key);
123 static void snmp_usm_password_to_key_sha1(const guint8 *password, guint passwordlen, const guint8 *engineID, guint engineLength, guint8 *key);
126 static snmp_usm_auth_model_t model_md5 = {snmp_usm_password_to_key_md5, snmp_usm_auth_md5, 16};
127 static snmp_usm_auth_model_t model_sha1 = {snmp_usm_password_to_key_sha1, snmp_usm_auth_sha1, 20};
129 static const value_string auth_types[] = {
134 static snmp_usm_auth_model_t* auth_models[] = {&model_md5,&model_sha1};
137 static const value_string priv_types[] = {
142 static snmp_usm_decoder_t priv_protos[] = {snmp_usm_priv_des, snmp_usm_priv_aes};
144 static snmp_ue_assoc_t* ueas = NULL;
145 static guint num_ueas = 0;
146 static snmp_ue_assoc_t* localized_ues = NULL;
147 static snmp_ue_assoc_t* unlocalized_ues = NULL;
150 /* Variabled used for handling enterprise spesific trap types */
151 typedef struct _snmp_st_assoc_t {
156 static guint num_specific_traps = 0;
157 static snmp_st_assoc_t *specific_traps = NULL;
158 static char *enterprise_oid = NULL;
159 static guint generic_trap = 0;
162 static snmp_usm_params_t usm_p = {FALSE,FALSE,0,0,0,0,NULL,NULL,NULL,NULL,NULL,NULL,NULL,FALSE};
165 #define TH_CRYPT 0x02
166 #define TH_REPORT 0x04
168 /* desegmentation of SNMP-over-TCP */
169 static gboolean snmp_desegment = TRUE;
171 /* Global variables */
173 guint32 MsgSecurityModel;
174 tvbuff_t *oid_tvb=NULL;
175 tvbuff_t *value_tvb=NULL;
177 static dissector_handle_t snmp_handle;
178 static dissector_handle_t data_handle;
180 static next_tvb_list_t var_list;
182 static int hf_snmp_v3_flags_auth = -1;
183 static int hf_snmp_v3_flags_crypt = -1;
184 static int hf_snmp_v3_flags_report = -1;
186 static int hf_snmp_engineid_conform = -1;
187 static int hf_snmp_engineid_enterprise = -1;
188 static int hf_snmp_engineid_format = -1;
189 static int hf_snmp_engineid_ipv4 = -1;
190 static int hf_snmp_engineid_ipv6 = -1;
191 static int hf_snmp_engineid_mac = -1;
192 static int hf_snmp_engineid_text = -1;
193 static int hf_snmp_engineid_time = -1;
194 static int hf_snmp_engineid_data = -1;
195 static int hf_snmp_decryptedPDU = -1;
196 static int hf_snmp_msgAuthentication = -1;
198 static int hf_snmp_noSuchObject = -1;
199 static int hf_snmp_noSuchInstance = -1;
200 static int hf_snmp_endOfMibView = -1;
201 static int hf_snmp_unSpecified = -1;
203 static int hf_snmp_integer32_value = -1;
204 static int hf_snmp_octetstring_value = -1;
205 static int hf_snmp_oid_value = -1;
206 static int hf_snmp_null_value = -1;
207 static int hf_snmp_ipv4_value = -1;
208 static int hf_snmp_ipv6_value = -1;
209 static int hf_snmp_anyaddress_value = -1;
210 static int hf_snmp_unsigned32_value = -1;
211 static int hf_snmp_unknown_value = -1;
212 static int hf_snmp_opaque_value = -1;
213 static int hf_snmp_nsap_value = -1;
214 static int hf_snmp_counter_value = -1;
215 static int hf_snmp_timeticks_value = -1;
216 static int hf_snmp_big_counter_value = -1;
217 static int hf_snmp_gauge32_value = -1;
219 static int hf_snmp_objectname = -1;
220 static int hf_snmp_scalar_instance_index = -1;
223 #include "packet-snmp-hf.c"
225 static int hf_smux_version = -1;
226 static int hf_smux_pdutype = -1;
228 /* Initialize the subtree pointers */
229 static gint ett_smux = -1;
230 static gint ett_snmp = -1;
231 static gint ett_engineid = -1;
232 static gint ett_msgFlags = -1;
233 static gint ett_encryptedPDU = -1;
234 static gint ett_decrypted = -1;
235 static gint ett_authParameters = -1;
236 static gint ett_internet = -1;
237 static gint ett_varbind = -1;
238 static gint ett_name = -1;
239 static gint ett_value = -1;
240 static gint ett_decoding_error = -1;
242 #include "packet-snmp-ett.c"
244 static const true_false_string auth_flags = {
249 /* Security Models */
251 #define SNMP_SEC_ANY 0
252 #define SNMP_SEC_V1 1
253 #define SNMP_SEC_V2C 2
254 #define SNMP_SEC_USM 3
256 static const value_string sec_models[] = {
257 { SNMP_SEC_ANY, "Any" },
258 { SNMP_SEC_V1, "V1" },
259 { SNMP_SEC_V2C, "V2C" },
260 { SNMP_SEC_USM, "USM" },
265 #define SMUX_MSG_OPEN 0
266 #define SMUX_MSG_CLOSE 1
267 #define SMUX_MSG_RREQ 2
268 #define SMUX_MSG_RRSP 3
269 #define SMUX_MSG_SOUT 4
271 static const value_string smux_types[] = {
272 { SMUX_MSG_OPEN, "Open" },
273 { SMUX_MSG_CLOSE, "Close" },
274 { SMUX_MSG_RREQ, "Registration Request" },
275 { SMUX_MSG_RRSP, "Registration Response" },
276 { SMUX_MSG_SOUT, "Commit Or Rollback" },
281 #define SNMP_IPA 0 /* IP Address */
282 #define SNMP_CNT 1 /* Counter (Counter32) */
283 #define SNMP_GGE 2 /* Gauge (Gauge32) */
284 #define SNMP_TIT 3 /* TimeTicks */
285 #define SNMP_OPQ 4 /* Opaque */
286 #define SNMP_NSP 5 /* NsapAddress */
287 #define SNMP_C64 6 /* Counter64 */
288 #define SNMP_U32 7 /* Uinteger32 */
295 dissector_table_t value_sub_dissectors_table;
299 snmp_lookup_specific_trap (guint specific_trap)
303 for (i = 0; i < num_specific_traps; i++) {
304 snmp_st_assoc_t *u = &(specific_traps[i]);
306 if ((u->trap == specific_trap) &&
307 (strcmp (u->enterprise, enterprise_oid) == 0))
317 * dissect_snmp_VarBind
318 * this routine dissects variable bindings, looking for the oid information in our oid reporsitory
319 * to format and add the value adequatelly.
321 * The choice to handwrite this code instead of using the asn compiler is to avoid having tons
322 * of uses of global variables distributed in very different parts of the code.
323 * Other than that there's a cosmetic thing: the tree from ASN generated code would be so
324 * convoluted due to the nesting of CHOICEs in the definition of VarBind/value.
326 * XXX: the length of this function (~400 lines) is an aberration!
327 * oid_key_t:key_type could become a series of callbacks instead of an enum
328 * the (! oid_info_is_ok) switch could be made into an array (would be slower)
331 NetworkAddress ::= CHOICE { internet IpAddress }
332 IpAddress ::= [APPLICATION 0] IMPLICIT OCTET STRING (SIZE (4))
333 TimeTicks ::= [APPLICATION 3] IMPLICIT INTEGER (0..4294967295)
334 Integer32 ::= INTEGER (-2147483648..2147483647)
335 ObjectName ::= OBJECT IDENTIFIER
336 Counter32 ::= [APPLICATION 1] IMPLICIT INTEGER (0..4294967295)
337 Gauge32 ::= [APPLICATION 2] IMPLICIT INTEGER (0..4294967295)
338 Unsigned32 ::= [APPLICATION 2] IMPLICIT INTEGER (0..4294967295)
339 Integer-value ::= INTEGER (-2147483648..2147483647)
340 Integer32 ::= INTEGER (-2147483648..2147483647)
341 ObjectID-value ::= OBJECT IDENTIFIER
343 TimeTicks ::= [APPLICATION 3] IMPLICIT INTEGER (0..4294967295)
344 Opaque ::= [APPLICATION 4] IMPLICIT OCTET STRING
345 Counter64 ::= [APPLICATION 6] IMPLICIT INTEGER (0..18446744073709551615)
347 ObjectSyntax ::= CHOICE {
349 application-wide ApplicationSyntax
352 SimpleSyntax ::= CHOICE {
353 integer-value Integer-value,
354 string-value String-value,
355 objectID-value ObjectID-value,
359 ApplicationSyntax ::= CHOICE {
360 ipAddress-value IpAddress,
361 counter-value Counter32,
362 timeticks-value TimeTicks,
363 arbitrary-value Opaque,
364 big-counter-value Counter64,
365 unsigned-integer-value Unsigned32
368 ValueType ::= CHOICE {
371 noSuchObject[0] IMPLICIT NULL,
372 noSuchInstance[1] IMPLICIT NULL,
373 endOfMibView[2] IMPLICIT NULL
376 VarBind ::= SEQUENCE {
383 extern int dissect_snmp_VarBind(gboolean implicit_tag _U_,
389 int seq_offset, name_offset, value_offset, value_start;
390 guint32 seq_len, name_len, value_len;
397 oid_info_t* oid_info = NULL;
398 guint oid_matched, oid_left;
399 proto_item *pi_name, *pi_varbind, *pi_value = NULL;
400 proto_tree *pt, *pt_varbind, *pt_name, *pt_value;
401 char label[ITEM_LABEL_LENGTH];
403 const char* info_oid = NULL;
406 int min_len = 0, max_len = 0;
407 gboolean oid_info_is_ok;
408 const char* oid_string = NULL;
409 enum {BER_NO_ERROR, BER_WRONG_LENGTH, BER_WRONG_TAG} format_error = BER_NO_ERROR;
413 /* first have the VarBind's sequence header */
414 offset = get_ber_identifier(tvb, offset, &ber_class, &pc, &tag);
415 offset = get_ber_length(tvb, offset, &seq_len, &ind);
417 seq_len += offset - seq_offset;
419 if (!pc && ber_class==BER_CLASS_UNI && tag==BER_UNI_TAG_SEQUENCE) {
420 proto_item* pi = proto_tree_add_text(tree, tvb, seq_offset, seq_len,"VarBind must be an universal class sequence");
421 pt = proto_item_add_subtree(pi,ett_decoding_error);
422 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "VarBind is not an universal class sequence");
423 return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
427 proto_item* pi = proto_tree_add_text(tree, tvb, seq_offset, seq_len,"Indicator must be clear in VarBind");
428 pt = proto_item_add_subtree(pi,ett_decoding_error);
429 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "VarBind has indicator set");
430 return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
433 /* then we have the ObjectName's header */
435 offset = get_ber_identifier(tvb, offset, &ber_class, &pc, &tag);
436 name_offset = offset = get_ber_length(tvb, offset, &name_len, &ind);
438 if (! ( !pc && ber_class==BER_CLASS_UNI && tag==BER_UNI_TAG_OID) ) {
439 proto_item* pi = proto_tree_add_text(tree, tvb, seq_offset, seq_len,"ObjectName must be an OID in primitive encoding");
440 pt = proto_item_add_subtree(pi,ett_decoding_error);
441 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "ObjectName not an OID");
442 return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
446 proto_item* pi = proto_tree_add_text(tree, tvb, seq_offset, seq_len,"Indicator must be clear in ObjectName");
447 pt = proto_item_add_subtree(pi,ett_decoding_error);
448 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "ObjectName has indicator set");
449 return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
453 value_start = offset;
455 /* then we have the value's header */
456 offset = get_ber_identifier(tvb, offset, &ber_class, &pc, &tag);
457 value_offset = offset = get_ber_length(tvb, offset, &value_len, &ind);
460 proto_item* pi = proto_tree_add_text(tree, tvb, seq_offset, seq_len,"the value must be in primitive encoding");
461 pt = proto_item_add_subtree(pi,ett_decoding_error);
462 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "value not in primitive encoding");
463 return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
466 /* Now, we know where everithing is */
470 /* we add the varbind tree root with a dummy label we'll fill later on */
471 pi_varbind = proto_tree_add_text(tree,tvb,seq_offset,seq_len,"VarBind");
472 pt_varbind = proto_item_add_subtree(pi_varbind,ett_varbind);
475 pi_name = proto_tree_add_item(pt_varbind,hf_snmp_objectname,tvb,name_offset,name_len,FALSE);
476 pt_name = proto_item_add_subtree(pi_name,ett_name);
478 /* fetch ObjectName and its relative oid_info */
479 oid_bytes = ep_tvb_memdup(tvb, name_offset, name_len);
480 oid_info = oid_get_from_encoded(oid_bytes, name_len, &subids, &oid_matched, &oid_left);
482 add_oid_debug_subtree(oid_info,pt_name);
485 proto_item* pi = proto_tree_add_text(pt_name,tvb, 0, 0, "invalid oid: %s", oid_bytes);
486 pt = proto_item_add_subtree(pi, ett_decoding_error);
487 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "invalid oid: %s", oid_bytes);
488 return dissect_unknown_ber(actx->pinfo, tvb, name_offset, pt);
491 if (oid_matched+oid_left) {
492 oid_string = oid_subid2string(subids,oid_matched+oid_left);
495 if (ber_class == BER_CLASS_CON) {
496 /* if we have an error value just add it and get out the way ASAP */
500 if (value_len != 0) {
501 min_len = max_len = 0;
502 format_error = BER_WRONG_LENGTH;
507 hfid = hf_snmp_noSuchObject;
508 note = "noSuchObject";
511 hfid = hf_snmp_noSuchInstance;
512 note = "noSuchInstance";
515 hfid = hf_snmp_endOfMibView;
516 note = "endOfMibView";
519 pi = proto_tree_add_text(pt_varbind,tvb,0,0,"Wrong tag for Error Value: expected 0, 1, or 2 but got: %d",tag);
520 pt = proto_item_add_subtree(pi,ett_decoding_error);
521 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "Wrong tag for SNMP VarBind error value");
522 return dissect_unknown_ber(actx->pinfo, tvb, value_start, pt);
526 pi = proto_tree_add_item(pt_varbind,hfid,tvb,value_offset,value_len,FALSE);
527 expert_add_info_format(actx->pinfo, pi, PI_RESPONSE_CODE, PI_NOTE, "%s",note);
528 g_strlcpy (label, note, ITEM_LABEL_LENGTH);
532 /* now we'll try to figure out which are the indexing sub-oids and whether the oid we know about is the one oid we have to use */
533 switch (oid_info->kind) {
534 case OID_KIND_SCALAR:
536 /* OK: we got the instance sub-id */
537 proto_tree_add_uint64(pt_name,hf_snmp_scalar_instance_index,tvb,name_offset,name_len,subids[oid_matched]);
538 oid_info_is_ok = TRUE;
540 } else if (oid_left == 0) {
541 if (ber_class == BER_CLASS_UNI && tag == BER_UNI_TAG_NULL) {
542 /* unSpecified does not require an instance sub-id add the new value and get off the way! */
543 pi_value = proto_tree_add_item(pt_varbind,hf_snmp_unSpecified,tvb,value_offset,value_len,FALSE);
546 proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"A scalar should have one instance sub-id this one has none");
547 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "No instance sub-id in scalar value");
548 oid_info_is_ok = FALSE;
552 proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"A scalar should have only one instance sub-id this has: %d",oid_left);
553 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "Wrong number of instance sub-ids in scalar value");
554 oid_info_is_ok = FALSE;
558 case OID_KIND_COLUMN:
559 if ( oid_info->parent->kind == OID_KIND_ROW) {
560 oid_key_t* k = oid_info->parent->key;
561 guint key_start = oid_matched;
562 guint key_len = oid_left;
563 oid_info_is_ok = TRUE;
565 if ( key_len == 0 && ber_class == BER_CLASS_UNI && tag == BER_UNI_TAG_NULL) {
566 /* unSpecified does not require an instance sub-id add the new value and get off the way! */
567 pi_value = proto_tree_add_item(pt_varbind,hf_snmp_unSpecified,tvb,value_offset,value_len,FALSE);
572 for (;k;k = k->next) {
575 if (key_start >= oid_matched+oid_left) {
576 proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"index sub-oid shorter than expected");
577 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "index sub-oid shorter than expected");
578 oid_info_is_ok = FALSE;
582 switch(k->key_type) {
583 case OID_KEY_TYPE_WRONG: {
584 proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"OID instaces not handled, if you want this implemented please contact the wireshark developers");
585 expert_add_info_format(actx->pinfo, pi, PI_UNDECODED, PI_WARN, "Unimplemented instance index");
586 oid_info_is_ok = FALSE;
589 case OID_KEY_TYPE_INTEGER: {
590 if (IS_FT_INT(k->ft_type)) {
591 proto_tree_add_int(pt_name,k->hfid,tvb,name_offset,name_len,(guint)subids[key_start]);
592 } else { /* if it's not an unsigned int let proto_tree_add_uint throw a warning */
593 proto_tree_add_uint(pt_name,k->hfid,tvb,name_offset,name_len,(guint)subids[key_start]);
597 continue; /* k->next */
599 case OID_KEY_TYPE_IMPLIED_OID:
600 suboid_len = key_len;
604 case OID_KEY_TYPE_OID: {
606 guint suboid_buf_len;
609 suboid_len = subids[key_start++];
613 suboid = &(subids[key_start]);
615 if( suboid_len == 0 ) {
616 proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"an index sub-oid OID cannot be 0 bytes long!");
617 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "index sub-oid OID with len=0");
618 oid_info_is_ok = FALSE;
622 if( key_len < suboid_len ) {
623 proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"index sub-oid should not be longer than remaining oid size");
624 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "index sub-oid longer than remaining oid size");
625 oid_info_is_ok = FALSE;
629 suboid_buf_len = oid_subid2encoded(suboid_len, suboid, &suboid_buf);
631 DISSECTOR_ASSERT(suboid_buf_len);
633 proto_tree_add_oid(pt_name,k->hfid,tvb,name_offset, suboid_buf_len, suboid_buf);
635 key_start += suboid_len;
636 key_len -= suboid_len + 1;
637 continue; /* k->next */
646 switch (k->key_type) {
647 case OID_KEY_TYPE_IPADDR:
648 suboid = &(subids[key_start]);
651 case OID_KEY_TYPE_IMPLIED_STRING:
652 case OID_KEY_TYPE_IMPLIED_BYTES:
653 case OID_KEY_TYPE_ETHER:
654 suboid = &(subids[key_start]);
658 buf_len = k->num_subids;
659 suboid = &(subids[key_start]);
669 if( key_len < buf_len ) {
670 proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"index string should not be longer than remaining oid size");
671 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "index string longer than remaining oid size");
672 oid_info_is_ok = FALSE;
676 buf = ep_alloc(buf_len+1);
677 for (i = 0; i < buf_len; i++)
678 buf[i] = (guint8)suboid[i];
681 switch(k->key_type) {
682 case OID_KEY_TYPE_STRING:
683 case OID_KEY_TYPE_IMPLIED_STRING:
684 proto_tree_add_string(pt_name,k->hfid,tvb,name_offset,buf_len, buf);
686 case OID_KEY_TYPE_BYTES:
687 case OID_KEY_TYPE_NSAP:
688 case OID_KEY_TYPE_IMPLIED_BYTES:
689 proto_tree_add_bytes(pt_name,k->hfid,tvb,name_offset,buf_len, buf);
691 case OID_KEY_TYPE_ETHER:
692 proto_tree_add_ether(pt_name,k->hfid,tvb,name_offset,buf_len, buf);
694 case OID_KEY_TYPE_IPADDR: {
695 guint32* ipv4_p = (void*)buf;
696 proto_tree_add_ipv4(pt_name,k->hfid,tvb,name_offset,buf_len, *ipv4_p);
699 DISSECTOR_ASSERT_NOT_REACHED();
704 key_start += buf_len;
706 continue; /* k->next*/
712 proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"We do not know how to handle this OID, if you want this implemented please contact the wireshark developers");
713 expert_add_info_format(actx->pinfo, pi, PI_UNDECODED, PI_WARN, "Unimplemented instance index");
714 oid_info_is_ok = FALSE;
718 proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"The COLUMS's parent is not a ROW. This is a BUG! please contact the wireshark developers.");
719 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_ERROR, "COLUMS's parent is not a ROW");
720 oid_info_is_ok = FALSE;
724 /* proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"This kind OID should have no value");
725 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "This kind OID should have no value"); */
726 oid_info_is_ok = FALSE;
732 if (oid_info_is_ok && oid_info->value_type) {
733 if (ber_class == BER_CLASS_UNI && tag == BER_UNI_TAG_NULL) {
734 pi_value = proto_tree_add_item(pt_varbind,hf_snmp_unSpecified,tvb,value_offset,value_len,FALSE);
736 if ((oid_info->value_type->ber_class != BER_CLASS_ANY) &&
737 (ber_class != oid_info->value_type->ber_class))
738 format_error = BER_WRONG_TAG;
740 if ((oid_info->value_type->ber_tag != BER_TAG_ANY) &&
741 (tag != oid_info->value_type->ber_tag))
742 format_error = BER_WRONG_TAG;
744 max_len = oid_info->value_type->max_len == -1 ? 0xffffff : oid_info->value_type->max_len;
745 min_len = oid_info->value_type->min_len;
747 if ((int)value_len < min_len || (int)value_len > max_len) {
748 format_error = BER_WRONG_LENGTH;
750 pi_value = proto_tree_add_item(pt_varbind,oid_info->value_hfid,tvb,value_offset,value_len,FALSE);
754 switch(ber_class|(tag<<4)) {
755 case BER_CLASS_UNI|(BER_UNI_TAG_INTEGER<<4):
756 max_len = 4; min_len = 1;
757 if (value_len > (guint)max_len && value_len < (guint)min_len) format_error = BER_WRONG_LENGTH;
758 hfid = hf_snmp_integer32_value;
760 case BER_CLASS_UNI|(BER_UNI_TAG_OCTETSTRING<<4):
761 hfid = hf_snmp_octetstring_value;
763 case BER_CLASS_UNI|(BER_UNI_TAG_OID<<4):
764 max_len = -1; min_len = 1;
765 if (value_len < (guint)min_len) format_error = BER_WRONG_LENGTH;
766 hfid = hf_snmp_oid_value;
768 case BER_CLASS_UNI|(BER_UNI_TAG_NULL<<4):
769 max_len = 0; min_len = 0;
770 if (value_len != 0) format_error = BER_WRONG_LENGTH;
771 hfid = hf_snmp_null_value;
773 case BER_CLASS_APP: /* | (SNMP_IPA<<4)*/
775 case 4: hfid = hf_snmp_ipv4_value; break;
776 case 16: hfid = hf_snmp_ipv6_value; break;
777 default: hfid = hf_snmp_anyaddress_value; break;
780 case BER_CLASS_APP|(SNMP_U32<<4):
781 hfid = hf_snmp_unsigned32_value;
783 case BER_CLASS_APP|(SNMP_GGE<<4):
784 hfid = hf_snmp_gauge32_value;
786 case BER_CLASS_APP|(SNMP_CNT<<4):
787 hfid = hf_snmp_counter_value;
789 case BER_CLASS_APP|(SNMP_TIT<<4):
790 hfid = hf_snmp_timeticks_value;
792 case BER_CLASS_APP|(SNMP_OPQ<<4):
793 hfid = hf_snmp_opaque_value;
795 case BER_CLASS_APP|(SNMP_NSP<<4):
796 hfid = hf_snmp_nsap_value;
798 case BER_CLASS_APP|(SNMP_C64<<4):
799 hfid = hf_snmp_big_counter_value;
802 hfid = hf_snmp_unknown_value;
806 if (format_error != BER_NO_ERROR) {
807 pi_value = proto_tree_add_item(pt_varbind,hfid,tvb,value_offset,value_len,FALSE);
808 expert_add_info_format(actx->pinfo, pi_value, PI_UNDECODED, PI_NOTE, "Unresolved value, Missing MIB");
810 oid_info_is_ok = FALSE;
813 pt_value = proto_item_add_subtree(pi_value,ett_value);
815 if (value_len > 0 && oid_string) {
816 tvbuff_t* sub_tvb = tvb_new_subset(tvb, value_offset, value_len, value_len);
818 next_tvb_add_string(&var_list, sub_tvb, (snmp_var_in_tree) ? pt_value : NULL, value_sub_dissectors_table, oid_string);
823 if (pi_value) proto_item_fill_label(PITEM_FINFO(pi_value), label);
825 if (oid_info && oid_info->name) {
827 repr = ep_strdup_printf("%s.%s (%s)",
829 oid_subid2string(&(subids[oid_matched]),oid_left),
830 oid_subid2string(subids,oid_matched+oid_left));
831 info_oid = ep_strdup_printf("%s.%s", oid_info->name,
832 oid_subid2string(&(subids[oid_matched]),oid_left));
834 repr = ep_strdup_printf("%s (%s)",
836 oid_subid2string(subids,oid_matched));
837 info_oid = oid_info->name;
839 } else if (oid_string) {
840 repr = ep_strdup(oid_string);
841 info_oid = oid_string;
843 repr = ep_strdup("[Bad OID]");
846 valstr = strstr(label,": ");
847 valstr = valstr ? valstr+2 : label;
849 proto_item_set_text(pi_varbind,"%s: %s",repr,valstr);
851 if (display_oid && info_oid) {
852 col_append_fstr (actx->pinfo->cinfo, COL_INFO, " %s", info_oid);
855 switch (format_error) {
856 case BER_WRONG_LENGTH: {
857 proto_tree* pt = proto_item_add_subtree(pi_value,ett_decoding_error);
858 proto_item* pi = proto_tree_add_text(pt,tvb,0,0,"Wrong value length: %u expecting: %u <= len <= %u",
861 max_len == -1 ? 0xFFFFFF : max_len);
862 pt = proto_item_add_subtree(pi,ett_decoding_error);
863 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "Wrong length for SNMP VarBind/value");
864 return dissect_unknown_ber(actx->pinfo, tvb, value_start, pt);
866 case BER_WRONG_TAG: {
867 proto_tree* pt = proto_item_add_subtree(pi_value,ett_decoding_error);
868 proto_item* pi = proto_tree_add_text(pt,tvb,0,0,"Wrong class/tag for Value expected: %d,%d got: %d,%d",
869 oid_info->value_type->ber_class,
870 oid_info->value_type->ber_tag,
873 pt = proto_item_add_subtree(pi,ett_decoding_error);
874 expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "Wrong class/tag for SNMP VarBind/value");
875 return dissect_unknown_ber(actx->pinfo, tvb, value_start, pt);
881 return seq_offset + seq_len;
885 #define F_SNMP_ENGINEID_CONFORM 0x80
886 #define SNMP_ENGINEID_RFC1910 0x00
887 #define SNMP_ENGINEID_RFC3411 0x01
889 static const true_false_string tfs_snmp_engineid_conform = {
891 "RFC1910 (Non-SNMPv3)"
894 #define SNMP_ENGINEID_FORMAT_IPV4 0x01
895 #define SNMP_ENGINEID_FORMAT_IPV6 0x02
896 #define SNMP_ENGINEID_FORMAT_MACADDRESS 0x03
897 #define SNMP_ENGINEID_FORMAT_TEXT 0x04
898 #define SNMP_ENGINEID_FORMAT_OCTETS 0x05
900 static const value_string snmp_engineid_format_vals[] = {
901 { SNMP_ENGINEID_FORMAT_IPV4, "IPv4 address" },
902 { SNMP_ENGINEID_FORMAT_IPV6, "IPv6 address" },
903 { SNMP_ENGINEID_FORMAT_MACADDRESS, "MAC address" },
904 { SNMP_ENGINEID_FORMAT_TEXT, "Text, administratively assigned" },
905 { SNMP_ENGINEID_FORMAT_OCTETS, "Octets, administratively assigned" },
910 * SNMP Engine ID dissection according to RFC 3411 (SnmpEngineID TC)
911 * or historic RFC 1910 (AgentID)
913 int dissect_snmp_engineid(proto_tree *tree, tvbuff_t *tvb, int offset, int len) {
914 proto_item *item = NULL;
915 guint8 conformance, format;
916 guint32 enterpriseid, seconds;
918 int len_remain = len;
920 /* first bit: engine id conformance */
921 if (len_remain<4) return offset;
922 conformance = ((tvb_get_guint8(tvb, offset)>>7) & 0x01);
923 proto_tree_add_item(tree, hf_snmp_engineid_conform, tvb, offset, 1, FALSE);
925 /* 4-byte enterprise number/name */
926 if (len_remain<4) return offset;
927 enterpriseid = tvb_get_ntohl(tvb, offset);
929 enterpriseid -= 0x80000000; /* ignore first bit */
930 proto_tree_add_uint(tree, hf_snmp_engineid_enterprise, tvb, offset, 4, enterpriseid);
934 switch(conformance) {
936 case SNMP_ENGINEID_RFC1910:
937 /* 12-byte AgentID w/ 8-byte trailer */
939 proto_tree_add_text(tree, tvb, offset, 8, "AgentID Trailer: 0x%s",
940 tvb_bytes_to_str(tvb, offset, 8));
944 proto_tree_add_text(tree, tvb, offset, len_remain, "<Data not conforming to RFC1910>");
949 case SNMP_ENGINEID_RFC3411: /* variable length: 5..32 */
951 /* 1-byte format specifier */
952 if (len_remain<1) return offset;
953 format = tvb_get_guint8(tvb, offset);
954 item = proto_tree_add_uint_format(tree, hf_snmp_engineid_format, tvb, offset, 1, format, "Engine ID Format: %s (%d)",
955 val_to_str(format, snmp_engineid_format_vals, "Reserved/Enterprise-specific"), format);
960 case SNMP_ENGINEID_FORMAT_IPV4:
961 /* 4-byte IPv4 address */
963 proto_tree_add_item(tree, hf_snmp_engineid_ipv4, tvb, offset, 4, FALSE);
968 case SNMP_ENGINEID_FORMAT_IPV6:
969 /* 16-byte IPv6 address */
970 if (len_remain==16) {
971 proto_tree_add_item(tree, hf_snmp_engineid_ipv6, tvb, offset, 16, FALSE);
976 case SNMP_ENGINEID_FORMAT_MACADDRESS:
977 /* 6-byte MAC address */
979 proto_tree_add_item(tree, hf_snmp_engineid_mac, tvb, offset, 6, FALSE);
984 case SNMP_ENGINEID_FORMAT_TEXT:
985 /* max. 27-byte string, administratively assigned */
986 if (len_remain<=27) {
987 proto_tree_add_item(tree, hf_snmp_engineid_text, tvb, offset, len_remain, FALSE);
993 /* most common enterprise-specific format: (ucd|net)-snmp random */
994 if ((enterpriseid==2021)||(enterpriseid==8072)) {
995 proto_item_append_text(item, (enterpriseid==2021) ? ": UCD-SNMP Random" : ": Net-SNMP Random");
996 /* demystify: 4B random, 4B epoch seconds */
998 proto_tree_add_item(tree, hf_snmp_engineid_data, tvb, offset, 4, FALSE);
999 seconds = tvb_get_letohl(tvb, offset+4);
1001 proto_tree_add_time_format(tree, hf_snmp_engineid_time, tvb, offset+4, 4,
1002 &ts, "Engine ID Data: Creation Time: %s",
1003 abs_time_secs_to_str(seconds));
1009 case SNMP_ENGINEID_FORMAT_OCTETS:
1011 /* max. 27 bytes, administratively assigned or unknown format */
1012 if (len_remain<=27) {
1013 proto_tree_add_item(tree, hf_snmp_engineid_data, tvb, offset, len_remain, FALSE);
1022 proto_tree_add_text(tree, tvb, offset, len_remain, "<Data not conforming to RFC3411>");
1029 static void set_ue_keys(snmp_ue_assoc_t* n ) {
1030 guint key_size = n->user.authModel->key_size;
1032 n->user.authKey.data = se_alloc(key_size);
1033 n->user.authKey.len = key_size;
1034 n->user.authModel->pass2key(n->user.authPassword.data,
1035 n->user.authPassword.len,
1038 n->user.authKey.data);
1040 n->user.privKey.data = se_alloc(key_size);
1041 n->user.privKey.len = key_size;
1042 n->user.authModel->pass2key(n->user.privPassword.data,
1043 n->user.privPassword.len,
1046 n->user.privKey.data);
1049 static snmp_ue_assoc_t* ue_se_dup(snmp_ue_assoc_t* o) {
1050 snmp_ue_assoc_t* d = se_memdup(o,sizeof(snmp_ue_assoc_t));
1052 d->user.authModel = o->user.authModel;
1054 d->user.privProtocol = o->user.privProtocol;
1056 d->user.userName.data = se_memdup(o->user.userName.data,o->user.userName.len);
1057 d->user.userName.len = o->user.userName.len;
1059 d->user.authPassword.data = o->user.authPassword.data ? se_memdup(o->user.authPassword.data,o->user.authPassword.len) : NULL;
1060 d->user.authPassword.len = o->user.authPassword.len;
1062 d->user.privPassword.data = o->user.privPassword.data ? se_memdup(o->user.privPassword.data,o->user.privPassword.len) : NULL;
1063 d->user.privPassword.len = o->user.privPassword.len;
1065 d->engine.len = o->engine.len;
1067 if (d->engine.len) {
1068 d->engine.data = se_memdup(o->engine.data,o->engine.len);
1077 #define CACHE_INSERT(c,a) if (c) { snmp_ue_assoc_t* t = c; c = a; c->next = t; } else { c = a; a->next = NULL; }
1079 static void renew_ue_cache(void) {
1083 localized_ues = NULL;
1084 unlocalized_ues = NULL;
1086 for(i = 0; i < num_ueas; i++) {
1087 snmp_ue_assoc_t* a = ue_se_dup(&(ueas[i]));
1089 if (a->engine.len) {
1090 CACHE_INSERT(localized_ues,a);
1093 CACHE_INSERT(unlocalized_ues,a);
1098 localized_ues = NULL;
1099 unlocalized_ues = NULL;
1104 static snmp_ue_assoc_t* localize_ue( snmp_ue_assoc_t* o, const guint8* engine, guint engine_len ) {
1105 snmp_ue_assoc_t* n = se_memdup(o,sizeof(snmp_ue_assoc_t));
1107 n->engine.data = se_memdup(engine,engine_len);
1108 n->engine.len = engine_len;
1116 #define localized_match(a,u,ul,e,el) \
1117 ( a->user.userName.len == ul \
1118 && a->engine.len == el \
1119 && memcmp( a->user.userName.data, u, (a->user.userName.len < ul) ? a->user.userName.len : ul ) == 0 \
1120 && memcmp( a->engine.data, e, (a->engine.len < el) ? a->engine.len : el ) == 0 )
1122 #define unlocalized_match(a,u,l) \
1123 ( a->user.userName.len == l && memcmp( a->user.userName.data, u, a->user.userName.len < l ? a->user.userName.len : l) == 0 )
1125 static snmp_ue_assoc_t* get_user_assoc(tvbuff_t* engine_tvb, tvbuff_t* user_tvb) {
1126 static snmp_ue_assoc_t* a;
1127 guint given_username_len;
1128 guint8* given_username;
1129 guint given_engine_len;
1130 guint8* given_engine;
1132 if ( ! (localized_ues || unlocalized_ues ) ) return NULL;
1134 if (! ( user_tvb && engine_tvb ) ) return NULL;
1136 given_username_len = tvb_length_remaining(user_tvb,0);
1137 given_username = ep_tvb_memdup(user_tvb,0,-1);
1138 given_engine_len = tvb_length_remaining(engine_tvb,0);
1139 given_engine = ep_tvb_memdup(engine_tvb,0,-1);
1141 for (a = localized_ues; a; a = a->next) {
1142 if ( localized_match(a, given_username, given_username_len, given_engine, given_engine_len) ) {
1147 for (a = unlocalized_ues; a; a = a->next) {
1148 if ( unlocalized_match(a, given_username, given_username_len) ) {
1149 snmp_ue_assoc_t* n = localize_ue( a, given_engine, given_engine_len );
1150 CACHE_INSERT(localized_ues,n);
1158 static gboolean snmp_usm_auth_md5(snmp_usm_params_t* p, guint8** calc_auth_p, guint* calc_auth_len_p, gchar const** error) {
1171 *error = "No Authenticator";
1175 key = p->user_assoc->user.authKey.data;
1176 key_len = p->user_assoc->user.authKey.len;
1179 *error = "User has no authKey";
1184 auth_len = tvb_length_remaining(p->auth_tvb,0);
1186 if (auth_len != 12) {
1187 *error = "Authenticator length wrong";
1191 msg_len = tvb_length_remaining(p->msg_tvb,0);
1192 msg = ep_tvb_memdup(p->msg_tvb,0,msg_len);
1195 auth = ep_tvb_memdup(p->auth_tvb,0,auth_len);
1197 start = p->auth_offset - p->start_offset;
1198 end = start + auth_len;
1200 /* fill the authenticator with zeros */
1201 for ( i = start ; i < end ; i++ ) {
1205 calc_auth = ep_alloc(16);
1207 md5_hmac(msg, msg_len, key, key_len, calc_auth);
1209 if (calc_auth_p) *calc_auth_p = calc_auth;
1210 if (calc_auth_len_p) *calc_auth_len_p = 12;
1212 return ( memcmp(auth,calc_auth,12) != 0 ) ? FALSE : TRUE;
1216 static gboolean snmp_usm_auth_sha1(snmp_usm_params_t* p _U_, guint8** calc_auth_p, guint* calc_auth_len_p, gchar const** error _U_) {
1229 *error = "No Authenticator";
1233 key = p->user_assoc->user.authKey.data;
1234 key_len = p->user_assoc->user.authKey.len;
1237 *error = "User has no authKey";
1242 auth_len = tvb_length_remaining(p->auth_tvb,0);
1245 if (auth_len != 12) {
1246 *error = "Authenticator length wrong";
1250 msg_len = tvb_length_remaining(p->msg_tvb,0);
1251 msg = ep_tvb_memdup(p->msg_tvb,0,msg_len);
1253 auth = ep_tvb_memdup(p->auth_tvb,0,auth_len);
1255 start = p->auth_offset - p->start_offset;
1256 end = start + auth_len;
1258 /* fill the authenticator with zeros */
1259 for ( i = start ; i < end ; i++ ) {
1263 calc_auth = ep_alloc(20);
1265 sha1_hmac(key, key_len, msg, msg_len, calc_auth);
1267 if (calc_auth_p) *calc_auth_p = calc_auth;
1268 if (calc_auth_len_p) *calc_auth_len_p = 12;
1270 return ( memcmp(auth,calc_auth,12) != 0 ) ? FALSE : TRUE;
1273 static tvbuff_t* snmp_usm_priv_des(snmp_usm_params_t* p _U_, tvbuff_t* encryptedData , gchar const** error _U_) {
1274 #ifdef HAVE_LIBGCRYPT
1276 gcry_cipher_hd_t hd = NULL;
1279 guint8* des_key = p->user_assoc->user.privKey.data; /* first 8 bytes */
1280 guint8* pre_iv = &(p->user_assoc->user.privKey.data[8]); /* last 8 bytes */
1285 tvbuff_t* clear_tvb;
1290 salt_len = tvb_length_remaining(p->priv_tvb,0);
1292 if (salt_len != 8) {
1293 *error = "decryptionError: msgPrivacyParameters length != 8";
1297 salt = ep_tvb_memdup(p->priv_tvb,0,salt_len);
1300 The resulting "salt" is XOR-ed with the pre-IV to obtain the IV.
1302 for (i=0; i<8; i++) {
1303 iv[i] = pre_iv[i] ^ salt[i];
1306 cryptgrm_len = tvb_length_remaining(encryptedData,0);
1308 if (cryptgrm_len % 8) {
1309 *error = "decryptionError: the length of the encrypted data is not a mutiple of 8 octets";
1313 cryptgrm = ep_tvb_memdup(encryptedData,0,-1);
1315 cleartext = ep_alloc(cryptgrm_len);
1317 err = gcry_cipher_open(&hd, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_CBC, 0);
1318 if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
1320 err = gcry_cipher_setiv(hd, iv, 8);
1321 if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
1323 err = gcry_cipher_setkey(hd,des_key,8);
1324 if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
1326 err = gcry_cipher_decrypt(hd, cleartext, cryptgrm_len, cryptgrm, cryptgrm_len);
1327 if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
1329 gcry_cipher_close(hd);
1331 clear_tvb = tvb_new_child_real_data(encryptedData, cleartext, cryptgrm_len, cryptgrm_len);
1336 *error = (void*)gpg_strerror(err);
1337 if (hd) gcry_cipher_close(hd);
1340 *error = "libgcrypt not present, cannot decrypt";
1345 static tvbuff_t* snmp_usm_priv_aes(snmp_usm_params_t* p _U_, tvbuff_t* encryptedData , gchar const** error _U_) {
1346 #ifdef HAVE_LIBGCRYPT
1348 gcry_cipher_hd_t hd = NULL;
1351 guint8* aes_key = p->user_assoc->user.privKey.data; /* first 16 bytes */
1356 tvbuff_t* clear_tvb;
1358 priv_len = tvb_length_remaining(p->priv_tvb,0);
1360 if (priv_len != 8) {
1361 *error = "decryptionError: msgPrivacyParameters length != 8";
1365 iv[0] = (p->boots & 0xff000000) >> 24;
1366 iv[1] = (p->boots & 0x00ff0000) >> 16;
1367 iv[2] = (p->boots & 0x0000ff00) >> 8;
1368 iv[3] = (p->boots & 0x000000ff);
1369 iv[4] = (p->time & 0xff000000) >> 24;
1370 iv[5] = (p->time & 0x00ff0000) >> 16;
1371 iv[6] = (p->time & 0x0000ff00) >> 8;
1372 iv[7] = (p->time & 0x000000ff);
1373 tvb_memcpy(p->priv_tvb,&(iv[8]),0,8);
1375 cryptgrm_len = tvb_length_remaining(encryptedData,0);
1376 cryptgrm = ep_tvb_memdup(encryptedData,0,-1);
1378 cleartext = ep_alloc(cryptgrm_len);
1380 err = gcry_cipher_open(&hd, GCRY_CIPHER_AES, GCRY_CIPHER_MODE_CFB, 0);
1381 if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
1383 err = gcry_cipher_setiv(hd, iv, 16);
1384 if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
1386 err = gcry_cipher_setkey(hd,aes_key,16);
1387 if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
1389 err = gcry_cipher_decrypt(hd, cleartext, cryptgrm_len, cryptgrm, cryptgrm_len);
1390 if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
1392 gcry_cipher_close(hd);
1394 clear_tvb = tvb_new_child_real_data(encryptedData, cleartext, cryptgrm_len, cryptgrm_len);
1399 *error = (void*)gpg_strerror(err);
1400 if (hd) gcry_cipher_close(hd);
1403 *error = "libgcrypt not present, cannot decrypt";
1409 gboolean check_ScopedPdu(tvbuff_t* tvb) {
1414 int hoffset, eoffset;
1417 offset = get_ber_identifier(tvb, 0, &class, &pc, &tag);
1418 offset = get_ber_length(tvb, offset, NULL, NULL);
1420 if ( ! (((class!=BER_CLASS_APP) && (class!=BER_CLASS_PRI) )
1421 && ( (!pc) || (class!=BER_CLASS_UNI) || (tag!=BER_UNI_TAG_ENUMERATED) )
1424 if((tvb_get_guint8(tvb, offset)==0)&&(tvb_get_guint8(tvb, offset+1)==0))
1429 offset = get_ber_identifier(tvb, offset, &class, &pc, &tag);
1430 offset = get_ber_length(tvb, offset, &len, NULL);
1431 eoffset = offset + len;
1433 if (eoffset <= hoffset) return FALSE;
1435 if ((class!=BER_CLASS_APP)&&(class!=BER_CLASS_PRI))
1436 if( (class!=BER_CLASS_UNI)
1437 ||((tag<BER_UNI_TAG_NumericString)&&(tag!=BER_UNI_TAG_OCTETSTRING)&&(tag!=BER_UNI_TAG_UTF8String)) )
1444 #include "packet-snmp-fn.c"
1448 dissect_snmp_pdu(tvbuff_t *tvb, int offset, packet_info *pinfo,
1449 proto_tree *tree, int proto, gint ett, gboolean is_tcp)
1452 guint length_remaining;
1454 gboolean pc, ind = 0;
1457 guint message_length;
1458 int start_offset = offset;
1459 guint32 version = 0;
1462 proto_tree *snmp_tree = NULL;
1463 proto_item *item = NULL;
1464 asn1_ctx_t asn1_ctx;
1465 asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
1468 usm_p.msg_tvb = tvb;
1469 usm_p.start_offset = tvb_offset_from_real_beginning(tvb);
1470 usm_p.engine_tvb = NULL;
1471 usm_p.user_tvb = NULL;
1472 usm_p.auth_item = NULL;
1473 usm_p.auth_tvb = NULL;
1474 usm_p.auth_offset = 0;
1475 usm_p.priv_tvb = NULL;
1476 usm_p.user_assoc = NULL;
1477 usm_p.authenticated = FALSE;
1478 usm_p.encrypted = FALSE;
1481 usm_p.authOK = FALSE;
1484 * This will throw an exception if we don't have any data left.
1485 * That's what we want. (See "tcp_dissect_pdus()", which is
1486 * similar, but doesn't have to deal with ASN.1.
1487 * XXX - can we make "tcp_dissect_pdus()" provide enough
1488 * information to the "get_pdu_len" routine so that we could
1489 * have that routine deal with ASN.1, and just use
1490 * "tcp_dissect_pdus()"?)
1492 length_remaining = tvb_ensure_length_remaining(tvb, offset);
1494 /* NOTE: we have to parse the message piece by piece, since the
1495 * capture length may be less than the message length: a 'global'
1496 * parsing is likely to fail.
1500 * If this is SNMP-over-TCP, we might have to do reassembly
1501 * in order to read the "Sequence Of" header.
1503 if (is_tcp && snmp_desegment && pinfo->can_desegment) {
1505 * This is TCP, and we should, and can, do reassembly.
1507 * Is the "Sequence Of" header split across segment
1508 * boundaries? We requre at least 6 bytes for the
1509 * header, which allows for a 4-byte length (ASN.1
1512 if (length_remaining < 6) {
1513 pinfo->desegment_offset = offset;
1514 pinfo->desegment_len = 6 - length_remaining;
1517 * Return 0, which means "I didn't dissect anything
1518 * because I don't have enough data - we need
1526 * OK, try to read the "Sequence Of" header; this gets the total
1527 * length of the SNMP message.
1529 /* Set tree to 0 to not display internal BER fields if option used.*/
1530 offset = dissect_ber_identifier(pinfo, 0, tvb, offset, &class, &pc, &tag);
1531 /*Get the total octet length of the SNMP data*/
1532 offset = dissect_ber_length(pinfo, 0, tvb, offset, &len, &ind);
1533 message_length = len + 2;
1535 /*Get the SNMP version data*/
1536 offset = dissect_ber_integer(FALSE, &asn1_ctx, 0, tvb, offset, -1, &version);
1540 * If this is SNMP-over-TCP, we might have to do reassembly
1541 * to get all of this message.
1543 if (is_tcp && snmp_desegment && pinfo->can_desegment) {
1545 * Yes - is the message split across segment boundaries?
1547 if (length_remaining < message_length) {
1549 * Yes. Tell the TCP dissector where the data
1550 * for this message starts in the data it handed
1551 * us, and how many more bytes we need, and
1554 pinfo->desegment_offset = start_offset;
1555 pinfo->desegment_len =
1556 message_length - length_remaining;
1559 * Return 0, which means "I didn't dissect anything
1560 * because I don't have enough data - we need
1567 next_tvb_init(&var_list);
1569 col_set_str(pinfo->cinfo, COL_PROTOCOL,
1570 proto_get_protocol_short_name(find_protocol_by_id(proto)));
1573 item = proto_tree_add_item(tree, proto, tvb, start_offset,
1574 message_length, FALSE);
1575 snmp_tree = proto_item_add_subtree(item, ett);
1581 offset = dissect_snmp_Message(FALSE , tvb, start_offset, &asn1_ctx, snmp_tree, -1);
1584 offset = dissect_snmp_Messagev2u(FALSE , tvb, start_offset, &asn1_ctx, snmp_tree, -1);
1588 offset = dissect_snmp_SNMPv3Message(FALSE , tvb, start_offset, &asn1_ctx, snmp_tree, -1);
1592 * Return the length remaining in the tvbuff, so
1593 * if this is SNMP-over-TCP, our caller thinks there's
1594 * nothing left to dissect.
1596 proto_tree_add_text(snmp_tree, tvb, offset, -1,"Unknown version");
1597 return length_remaining;
1601 /* There may be appended data after the SNMP data, so treat as raw
1602 * data which needs to be dissected in case of UDP as UDP is PDU oriented.
1604 if((!is_tcp) && (length_remaining > (guint)offset)) {
1605 next_tvb = tvb_new_subset_remaining(tvb, offset);
1606 call_dissector(data_handle, next_tvb, pinfo, tree);
1609 next_tvb_call(&var_list, pinfo, tree, NULL, data_handle);
1616 dissect_snmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1618 conversation_t *conversation;
1627 * See if this looks like SNMP or not. if not, return 0 so
1628 * wireshark can try som other dissector instead.
1630 /* All SNMP packets are BER encoded and consist of a SEQUENCE
1631 * that spans the entire PDU. The first item is an INTEGER that
1632 * has the values 0-2 (version 1-3).
1633 * if not it is not snmp.
1635 /* SNMP starts with a SEQUENCE */
1636 offset = get_ber_identifier(tvb, 0, &tmp_class, &tmp_pc, &tmp_tag);
1637 if((tmp_class!=BER_CLASS_UNI)||(tmp_tag!=BER_UNI_TAG_SEQUENCE)){
1640 /* then comes a length which spans the rest of the tvb */
1641 offset = get_ber_length(tvb, offset, &tmp_length, &tmp_ind);
1642 /* if(tmp_length!=(guint32)tvb_reported_length_remaining(tvb, offset)){
1643 * Losen the heuristic a bit to handle the case where data has intentionally
1644 * been added after the snmp PDU ( UDP case)
1646 if ( pinfo->ptype == PT_UDP ){
1647 if(tmp_length>(guint32)tvb_reported_length_remaining(tvb, offset)){
1651 if(tmp_length!=(guint32)tvb_reported_length_remaining(tvb, offset)){
1655 /* then comes an INTEGER (version)*/
1656 offset = get_ber_identifier(tvb, offset, &tmp_class, &tmp_pc, &tmp_tag);
1657 if((tmp_class!=BER_CLASS_UNI)||(tmp_tag!=BER_UNI_TAG_INTEGER)){
1660 /* do we need to test that version is 0 - 2 (version1-3) ? */
1664 * The first SNMP packet goes to the SNMP port; the second one
1665 * may come from some *other* port, but goes back to the same
1666 * IP address and port as the ones from which the first packet
1667 * came; all subsequent packets presumably go between those two
1668 * IP addresses and ports.
1670 * If this packet went to the SNMP port, we check to see if
1671 * there's already a conversation with one address/port pair
1672 * matching the source IP address and port of this packet,
1673 * the other address matching the destination IP address of this
1674 * packet, and any destination port.
1676 * If not, we create one, with its address 1/port 1 pair being
1677 * the source address/port of this packet, its address 2 being
1678 * the destination address of this packet, and its port 2 being
1679 * wildcarded, and give it the SNMP dissector as a dissector.
1681 if (pinfo->destport == UDP_PORT_SNMP) {
1682 conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst, PT_UDP,
1683 pinfo->srcport, 0, NO_PORT_B);
1684 if( (conversation == NULL) || (conversation->dissector_handle!=snmp_handle) ){
1685 conversation = conversation_new(pinfo->fd->num, &pinfo->src, &pinfo->dst, PT_UDP,
1686 pinfo->srcport, 0, NO_PORT2);
1687 conversation_set_dissector(conversation, snmp_handle);
1691 return dissect_snmp_pdu(tvb, 0, pinfo, tree, proto_snmp, ett_snmp, FALSE);
1694 dissect_snmp_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1699 while (tvb_reported_length_remaining(tvb, offset) > 0) {
1700 message_len = dissect_snmp_pdu(tvb, 0, pinfo, tree,
1701 proto_snmp, ett_snmp, TRUE);
1702 if (message_len == 0) {
1704 * We don't have all the data for that message,
1705 * so we need to do desegmentation;
1706 * "dissect_snmp_pdu()" has set that up.
1710 offset += message_len;
1715 dissect_smux(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
1717 proto_tree *smux_tree = NULL;
1718 proto_item *item = NULL;
1720 next_tvb_init(&var_list);
1722 col_set_str(pinfo->cinfo, COL_PROTOCOL, "SMUX");
1725 item = proto_tree_add_item(tree, proto_smux, tvb, 0, -1, FALSE);
1726 smux_tree = proto_item_add_subtree(item, ett_smux);
1729 dissect_SMUX_PDUs_PDU(tvb, pinfo, tree);
1734 MD5 Password to Key Algorithm
1737 static void snmp_usm_password_to_key_md5(const guint8 *password,
1739 const guint8 *engineID,
1743 guint8 *cp, password_buf[64];
1744 guint32 password_index = 0;
1745 guint32 count = 0, i;
1747 md5_init(&MD); /* initialize MD5 */
1749 /**********************************************/
1750 /* Use while loop until we've done 1 Megabyte */
1751 /**********************************************/
1752 while (count < 1048576) {
1754 for (i = 0; i < 64; i++) {
1755 /*************************************************/
1756 /* Take the next octet of the password, wrapping */
1757 /* to the beginning of the password as necessary.*/
1758 /*************************************************/
1759 *cp++ = password[password_index++ % passwordlen];
1761 md5_append(&MD, password_buf, 64);
1764 md5_finish(&MD, key1); /* tell MD5 we're done */
1766 /*****************************************************/
1767 /* Now localize the key with the engineID and pass */
1768 /* through MD5 to produce final key */
1769 /* May want to ensure that engineLength <= 32, */
1770 /* otherwise need to use a buffer larger than 64 */
1771 /*****************************************************/
1774 md5_append(&MD, key1, 16);
1775 md5_append(&MD, engineID, engineLength);
1776 md5_append(&MD, key1, 16);
1777 md5_finish(&MD, key);
1786 SHA1 Password to Key Algorithm COPIED from RFC 3414 A.2.2
1789 static void snmp_usm_password_to_key_sha1(const guint8 *password,
1791 const guint8 *engineID,
1795 guint8 *cp, password_buf[72];
1796 guint32 password_index = 0;
1797 guint32 count = 0, i;
1799 sha1_starts(&SH); /* initialize SHA */
1801 /**********************************************/
1802 /* Use while loop until we've done 1 Megabyte */
1803 /**********************************************/
1804 while (count < 1048576) {
1806 for (i = 0; i < 64; i++) {
1807 /*************************************************/
1808 /* Take the next octet of the password, wrapping */
1809 /* to the beginning of the password as necessary.*/
1810 /*************************************************/
1811 *cp++ = password[password_index++ % passwordlen];
1813 sha1_update (&SH, password_buf, 64);
1816 sha1_finish(&SH, key);
1818 /*****************************************************/
1819 /* Now localize the key with the engineID and pass */
1820 /* through SHA to produce final key */
1821 /* May want to ensure that engineLength <= 32, */
1822 /* otherwise need to use a buffer larger than 72 */
1823 /*****************************************************/
1824 memcpy(password_buf, key, 20);
1825 memcpy(password_buf+20, engineID, engineLength);
1826 memcpy(password_buf+20+engineLength, key, 20);
1829 sha1_update(&SH, password_buf, 40+engineLength);
1830 sha1_finish(&SH, key);
1835 static void process_prefs(void) {}
1837 static void* snmp_users_copy_cb(void* dest, const void* orig, unsigned len _U_) {
1838 const snmp_ue_assoc_t* o = orig;
1839 snmp_ue_assoc_t* d = dest;
1841 d->auth_model = o->auth_model;
1842 d->user.authModel = auth_models[o->auth_model];
1844 d->priv_proto = o->priv_proto;
1845 d->user.privProtocol = priv_protos[o->priv_proto];
1847 d->user.userName.data = g_memdup(o->user.userName.data,o->user.userName.len);
1848 d->user.userName.len = o->user.userName.len;
1850 d->user.authPassword.data = o->user.authPassword.data ? g_memdup(o->user.authPassword.data,o->user.authPassword.len) : NULL;
1851 d->user.authPassword.len = o->user.authPassword.len;
1853 d->user.privPassword.data = o->user.privPassword.data ? g_memdup(o->user.privPassword.data,o->user.privPassword.len) : NULL;
1854 d->user.privPassword.len = o->user.privPassword.len;
1856 d->engine.len = o->engine.len;
1857 if (o->engine.data) {
1858 d->engine.data = g_memdup(o->engine.data,o->engine.len);
1861 d->user.authKey.data = o->user.authKey.data ? g_memdup(o->user.authKey.data,o->user.authKey.len) : NULL;
1862 d->user.authKey.len = o->user.authKey.len;
1864 d->user.privKey.data = o->user.privKey.data ? g_memdup(o->user.privKey.data,o->user.privKey.len) : NULL;
1865 d->user.privKey.len = o->user.privKey.len;
1870 static void snmp_users_free_cb(void* p) {
1871 snmp_ue_assoc_t* ue = p;
1872 g_free(ue->user.userName.data);
1873 g_free(ue->user.authPassword.data);
1874 g_free(ue->user.privPassword.data);
1875 g_free(ue->user.authKey.data);
1876 g_free(ue->user.privKey.data);
1877 g_free(ue->engine.data);
1880 static void snmp_users_update_cb(void* p _U_, const char** err) {
1881 snmp_ue_assoc_t* ue = p;
1882 GString* es = g_string_new("");
1886 if (! ue->user.userName.len) g_string_append(es,"no userName, ");
1889 g_string_truncate(es,es->len-2);
1890 *err = ep_strdup(es->str);
1893 g_string_free(es,TRUE);
1898 UAT_LSTRING_CB_DEF(snmp_users,userName,snmp_ue_assoc_t,user.userName.data,user.userName.len)
1899 UAT_LSTRING_CB_DEF(snmp_users,authPassword,snmp_ue_assoc_t,user.authPassword.data,user.authPassword.len)
1900 UAT_LSTRING_CB_DEF(snmp_users,privPassword,snmp_ue_assoc_t,user.privPassword.data,user.privPassword.len)
1901 UAT_BUFFER_CB_DEF(snmp_users,engine_id,snmp_ue_assoc_t,engine.data,engine.len)
1902 UAT_VS_DEF(snmp_users,auth_model,snmp_ue_assoc_t,0,"MD5")
1903 UAT_VS_DEF(snmp_users,priv_proto,snmp_ue_assoc_t,0,"DES")
1906 snmp_specific_trap_copy_cb(void *dest, const void *orig, unsigned len _U_)
1908 snmp_st_assoc_t *u = dest;
1909 const snmp_st_assoc_t *o = orig;
1911 u->enterprise = g_strdup(o->enterprise);
1913 u->desc = g_strdup(o->desc);
1919 snmp_specific_trap_free_cb(void *r)
1921 snmp_st_assoc_t *u = r;
1923 g_free(u->enterprise);
1927 UAT_CSTRING_CB_DEF(specific_traps, enterprise, snmp_st_assoc_t)
1928 UAT_DEC_CB_DEF(specific_traps, trap, snmp_st_assoc_t)
1929 UAT_CSTRING_CB_DEF(specific_traps, desc, snmp_st_assoc_t)
1931 /*--- proto_register_snmp -------------------------------------------*/
1932 void proto_register_snmp(void) {
1933 /* List of fields */
1934 static hf_register_info hf[] = {
1935 { &hf_snmp_v3_flags_auth,
1936 { "Authenticated", "snmp.v3.flags.auth", FT_BOOLEAN, 8,
1937 TFS(&tfs_set_notset), TH_AUTH, NULL, HFILL }},
1938 { &hf_snmp_v3_flags_crypt,
1939 { "Encrypted", "snmp.v3.flags.crypt", FT_BOOLEAN, 8,
1940 TFS(&tfs_set_notset), TH_CRYPT, NULL, HFILL }},
1941 { &hf_snmp_v3_flags_report,
1942 { "Reportable", "snmp.v3.flags.report", FT_BOOLEAN, 8,
1943 TFS(&tfs_set_notset), TH_REPORT, NULL, HFILL }},
1944 { &hf_snmp_engineid_conform, {
1945 "Engine ID Conformance", "snmp.engineid.conform", FT_BOOLEAN, 8,
1946 TFS(&tfs_snmp_engineid_conform), F_SNMP_ENGINEID_CONFORM, "Engine ID RFC3411 Conformance", HFILL }},
1947 { &hf_snmp_engineid_enterprise, {
1948 "Engine Enterprise ID", "snmp.engineid.enterprise", FT_UINT32, BASE_DEC,
1949 VALS(sminmpec_values), 0, NULL, HFILL }},
1950 { &hf_snmp_engineid_format, {
1951 "Engine ID Format", "snmp.engineid.format", FT_UINT8, BASE_DEC,
1952 VALS(snmp_engineid_format_vals), 0, NULL, HFILL }},
1953 { &hf_snmp_engineid_ipv4, {
1954 "Engine ID Data: IPv4 address", "snmp.engineid.ipv4", FT_IPv4, BASE_NONE,
1955 NULL, 0, NULL, HFILL }},
1956 { &hf_snmp_engineid_ipv6, {
1957 "Engine ID Data: IPv6 address", "snmp.engineid.ipv6", FT_IPv6, BASE_NONE,
1958 NULL, 0, NULL, HFILL }},
1959 { &hf_snmp_engineid_mac, {
1960 "Engine ID Data: MAC address", "snmp.engineid.mac", FT_ETHER, BASE_NONE,
1961 NULL, 0, NULL, HFILL }},
1962 { &hf_snmp_engineid_text, {
1963 "Engine ID Data: Text", "snmp.engineid.text", FT_STRING, BASE_NONE,
1964 NULL, 0, NULL, HFILL }},
1965 { &hf_snmp_engineid_time, {
1966 "Engine ID Data: Time", "snmp.engineid.time", FT_ABSOLUTE_TIME, BASE_NONE,
1967 NULL, 0, NULL, HFILL }},
1968 { &hf_snmp_engineid_data, {
1969 "Engine ID Data", "snmp.engineid.data", FT_BYTES, BASE_NONE,
1970 NULL, 0, NULL, HFILL }},
1971 { &hf_snmp_msgAuthentication, {
1972 "Authentication", "snmp.v3.auth", FT_BOOLEAN, BASE_NONE,
1973 TFS(&auth_flags), 0, NULL, HFILL }},
1974 { &hf_snmp_decryptedPDU, {
1975 "Decrypted ScopedPDU", "snmp.decrypted_pdu", FT_BYTES, BASE_NONE,
1976 NULL, 0, "Decrypted PDU", HFILL }},
1977 { &hf_snmp_noSuchObject, { "noSuchObject", "snmp.noSuchObject", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
1978 { &hf_snmp_noSuchInstance, { "noSuchInstance", "snmp.noSuchInstance", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
1979 { &hf_snmp_endOfMibView, { "endOfMibView", "snmp.endOfMibView", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
1980 { &hf_snmp_unSpecified, { "unSpecified", "snmp.unSpecified", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
1982 { &hf_snmp_integer32_value, { "Value (Integer32)", "snmp.value.int", FT_INT64, BASE_DEC, NULL, 0, NULL, HFILL }},
1983 { &hf_snmp_octetstring_value, { "Value (OctetString)", "snmp.value.octets", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }},
1984 { &hf_snmp_oid_value, { "Value (OID)", "snmp.value.oid", FT_OID, BASE_NONE, NULL, 0, NULL, HFILL }},
1985 { &hf_snmp_null_value, { "Value (Null)", "snmp.value.null", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }},
1986 { &hf_snmp_ipv4_value, { "Value (IpAddress)", "snmp.value.ipv4", FT_IPv4, BASE_NONE, NULL, 0, NULL, HFILL }},
1987 { &hf_snmp_ipv6_value, { "Value (IpAddress)", "snmp.value.ipv6", FT_IPv6, BASE_NONE, NULL, 0, NULL, HFILL }},
1988 { &hf_snmp_anyaddress_value, { "Value (IpAddress)", "snmp.value.addr", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }},
1989 { &hf_snmp_unsigned32_value, { "Value (Unsigned32)", "snmp.value.u32", FT_INT64, BASE_DEC, NULL, 0, NULL, HFILL }},
1990 { &hf_snmp_gauge32_value, { "Value (Gauge32)", "snmp.value.g32", FT_INT64, BASE_DEC, NULL, 0, NULL, HFILL }},
1991 { &hf_snmp_unknown_value, { "Value (Unknown)", "snmp.value.unk", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }},
1992 { &hf_snmp_counter_value, { "Value (Counter32)", "snmp.value.counter", FT_UINT64, BASE_DEC, NULL, 0, NULL, HFILL }},
1993 { &hf_snmp_big_counter_value, { "Value (Counter64)", "snmp.value.counter", FT_UINT64, BASE_DEC, NULL, 0, NULL, HFILL }},
1994 { &hf_snmp_nsap_value, { "Value (NSAP)", "snmp.value.nsap", FT_UINT64, BASE_DEC, NULL, 0, NULL, HFILL }},
1995 { &hf_snmp_timeticks_value, { "Value (Timeticks)", "snmp.value.timeticks", FT_UINT64, BASE_DEC, NULL, 0, NULL, HFILL }},
1996 { &hf_snmp_opaque_value, { "Value (Opaque)", "snmp.value.opaque", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }},
1997 { &hf_snmp_objectname, { "Object Name", "snmp.name", FT_OID, BASE_NONE, NULL, 0, NULL, HFILL }},
1998 { &hf_snmp_scalar_instance_index, { "Scalar Instance Index", "snmp.name.index", FT_UINT64, BASE_DEC, NULL, 0, NULL, HFILL }},
2001 #include "packet-snmp-hfarr.c"
2004 /* List of subtrees */
2005 static gint *ett[] = {
2011 &ett_authParameters,
2016 &ett_decoding_error,
2017 #include "packet-snmp-ettarr.c"
2019 module_t *snmp_module;
2021 static uat_field_t users_fields[] = {
2022 UAT_FLD_BUFFER(snmp_users,engine_id,"Engine ID","Engine-id for this entry (empty = any)"),
2023 UAT_FLD_LSTRING(snmp_users,userName,"Username","The username"),
2024 UAT_FLD_VS(snmp_users,auth_model,"Authentication model",auth_types,"Algorithm to be used for authentication."),
2025 UAT_FLD_LSTRING(snmp_users,authPassword,"Password","The password used for authenticating packets for this entry"),
2026 UAT_FLD_VS(snmp_users,priv_proto,"Privacy protocol",priv_types,"Algorithm to be used for privacy."),
2027 UAT_FLD_LSTRING(snmp_users,privPassword,"Privacy password","The password used for encrypting packets for this entry"),
2031 uat_t *assocs_uat = uat_new("SNMP Users",
2032 sizeof(snmp_ue_assoc_t),
2038 "ChSNMPUsersSection",
2040 snmp_users_update_cb,
2044 static uat_field_t specific_traps_flds[] = {
2045 UAT_FLD_CSTRING(specific_traps,enterprise,"Enterprise OID","Enterprise Object Identifier"),
2046 UAT_FLD_DEC(specific_traps,trap,"Trap Id","The specific-trap value"),
2047 UAT_FLD_CSTRING(specific_traps,desc,"Description","Trap type description"),
2051 uat_t* specific_traps_uat = uat_new("SNMP Enterprise Specific Trap Types",
2052 sizeof(snmp_st_assoc_t),
2053 "snmp_specific_traps",
2055 (void**) &specific_traps,
2056 &num_specific_traps,
2058 "ChSNMPEnterpriseSpecificTrapTypes",
2059 snmp_specific_trap_copy_cb,
2061 snmp_specific_trap_free_cb,
2062 specific_traps_flds);
2064 /* Register protocol */
2065 proto_snmp = proto_register_protocol(PNAME, PSNAME, PFNAME);
2066 new_register_dissector("snmp", dissect_snmp, proto_snmp);
2068 /* Register fields and subtrees */
2069 proto_register_field_array(proto_snmp, hf, array_length(hf));
2070 proto_register_subtree_array(ett, array_length(ett));
2073 /* Register configuration preferences */
2074 snmp_module = prefs_register_protocol(proto_snmp, process_prefs);
2075 prefs_register_bool_preference(snmp_module, "display_oid",
2076 "Show SNMP OID in info column",
2077 "Whether the SNMP OID should be shown in the info column",
2080 prefs_register_obsolete_preference(snmp_module, "mib_modules");
2081 prefs_register_obsolete_preference(snmp_module, "users_file");
2083 prefs_register_bool_preference(snmp_module, "desegment",
2084 "Reassemble SNMP-over-TCP messages\nspanning multiple TCP segments",
2085 "Whether the SNMP dissector should reassemble messages spanning multiple TCP segments."
2086 " To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
2089 prefs_register_bool_preference(snmp_module, "var_in_tree",
2090 "Display dissected variables inside SNMP tree",
2091 "ON - display dissected variables inside SNMP tree, OFF - display dissected variables in root tree after SNMP",
2094 prefs_register_uat_preference(snmp_module, "users_table",
2096 "Table of engine-user associations used for authentication and decryption",
2099 prefs_register_uat_preference(snmp_module, "specific_traps_table",
2100 "Enterprise Specific Trap Types",
2101 "Table of enterprise specific-trap type descriptions",
2102 specific_traps_uat);
2105 prefs_register_static_text_preference(snmp_module, "info_mibs",
2106 "MIB settings can be changed in the Name Resolution preferences",
2107 "MIB settings can be changed in the Name Resolution preferences");
2110 value_sub_dissectors_table = register_dissector_table("snmp.variable_oid","SNMP Variable OID", FT_STRING, BASE_NONE);
2112 register_init_routine(renew_ue_cache);
2116 /*--- proto_reg_handoff_snmp ---------------------------------------*/
2117 void proto_reg_handoff_snmp(void) {
2118 dissector_handle_t snmp_tcp_handle;
2120 snmp_handle = find_dissector("snmp");
2122 dissector_add("udp.port", UDP_PORT_SNMP, snmp_handle);
2123 dissector_add("udp.port", UDP_PORT_SNMP_TRAP, snmp_handle);
2124 dissector_add("udp.port", UDP_PORT_SNMP_PATROL, snmp_handle);
2125 dissector_add("ethertype", ETHERTYPE_SNMP, snmp_handle);
2126 dissector_add("ipx.socket", IPX_SOCKET_SNMP_AGENT, snmp_handle);
2127 dissector_add("ipx.socket", IPX_SOCKET_SNMP_SINK, snmp_handle);
2128 dissector_add("hpext.dxsap", HPEXT_SNMP, snmp_handle);
2130 snmp_tcp_handle = create_dissector_handle(dissect_snmp_tcp, proto_snmp);
2131 dissector_add("tcp.port", TCP_PORT_SNMP, snmp_tcp_handle);
2132 dissector_add("tcp.port", TCP_PORT_SNMP_TRAP, snmp_tcp_handle);
2134 data_handle = find_dissector("data");
2136 register_ber_syntax_dissector("SNMP", proto_snmp, dissect_snmp_tcp);
2139 * Process preference settings.
2141 * We can't do this in the register routine, as preferences aren't
2142 * read until all dissector register routines have been called (so
2143 * that all dissector preferences have been registered).
2150 proto_register_smux(void)
2152 static hf_register_info hf[] = {
2154 { "Version", "smux.version", FT_UINT8, BASE_DEC, NULL,
2155 0x0, NULL, HFILL }},
2157 { "PDU type", "smux.pdutype", FT_UINT8, BASE_DEC, VALS(smux_types),
2158 0x0, NULL, HFILL }},
2160 static gint *ett[] = {
2164 proto_smux = proto_register_protocol("SNMP Multiplex Protocol",
2166 proto_register_field_array(proto_smux, hf, array_length(hf));
2167 proto_register_subtree_array(ett, array_length(ett));
2172 proto_reg_handoff_smux(void)
2174 dissector_handle_t smux_handle;
2176 smux_handle = create_dissector_handle(dissect_smux, proto_smux);
2177 dissector_add("tcp.port", TCP_PORT_SMUX, smux_handle);