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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:34:10 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-10 20:34:10 +0000
commite4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc (patch)
tree68cb5ef9081156392f1dd62a00c6ccc1451b93df /epan/dissectors/packet-snmp.c
parentInitial commit. (diff)
downloadwireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.tar.xz
wireshark-e4ba6dbc3f1e76890b22773807ea37fe8fa2b1bc.zip
Adding upstream version 4.2.2.upstream/4.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'epan/dissectors/packet-snmp.c')
-rw-r--r--epan/dissectors/packet-snmp.c4207
1 files changed, 4207 insertions, 0 deletions
diff --git a/epan/dissectors/packet-snmp.c b/epan/dissectors/packet-snmp.c
new file mode 100644
index 00000000..eac17af6
--- /dev/null
+++ b/epan/dissectors/packet-snmp.c
@@ -0,0 +1,4207 @@
+/* Do not modify this file. Changes will be overwritten. */
+/* Generated automatically by the ASN.1 to Wireshark dissector compiler */
+/* packet-snmp.c */
+/* asn2wrs.py -b -L -p snmp -c ./snmp.cnf -s ./packet-snmp-template -D . -O ../.. snmp.asn */
+
+/* packet-snmp.c
+ * Routines for SNMP (simple network management protocol)
+ * Copyright (C) 1998 Didier Jorand
+ *
+ * See RFC 1157 for SNMPv1.
+ *
+ * See RFCs 1901, 1905, and 1906 for SNMPv2c.
+ *
+ * See RFCs 1905, 1906, 1909, and 1910 for SNMPv2u [historic].
+ *
+ * See RFCs 2570-2576 for SNMPv3
+ * Updated to use the asn2wrs compiler made by Tomas Kukosa
+ * Copyright (C) 2005 - 2006 Anders Broman [AT] ericsson.com
+ *
+ * See RFC 3414 for User-based Security Model for SNMPv3
+ * See RFC 3826 for (AES) Cipher Algorithm in the SNMP USM
+ * See RFC 2578 for Structure of Management Information Version 2 (SMIv2)
+ * Copyright (C) 2007 Luis E. Garcia Ontanon <luis@ontanon.org>
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * Copyright 1998 Gerald Combs
+ *
+ * Some stuff from:
+ *
+ * GXSNMP -- An snmp mangament application
+ * Copyright (C) 1998 Gregory McLean & Jochen Friedrich
+ * Beholder RMON ethernet network monitor,Copyright (C) 1993 DNPAP group
+ *
+ * SPDX-License-Identifier: GPL-2.0-or-later
+ */
+
+#if 0
+#include <stdio.h>
+#define D(args) do {printf args; fflush(stdout); } while(0)
+#endif
+
+#include "config.h"
+
+#include <epan/packet.h>
+#include <epan/strutil.h>
+#include <epan/conversation.h>
+#include <epan/etypes.h>
+#include <epan/prefs.h>
+#include <epan/addr_resolv.h>
+#include <epan/next_tvb.h>
+#include <epan/uat.h>
+#include <epan/asn1.h>
+#include <epan/expert.h>
+#include <epan/oids.h>
+#include <epan/srt_table.h>
+#include <epan/tap.h>
+#include "packet-ipx.h"
+#include "packet-hpext.h"
+#include "packet-ber.h"
+#include "packet-snmp.h"
+#include <wsutil/wsgcrypt.h>
+
+#define PNAME "Simple Network Management Protocol"
+#define PSNAME "SNMP"
+#define PFNAME "snmp"
+
+#define UDP_PORT_SNMP 161
+#define UDP_PORT_SNMP_TRAP 162
+#define TCP_PORT_SNMP 161
+#define TCP_PORT_SNMP_TRAP 162
+#define TCP_PORT_SMUX 199
+#define UDP_PORT_SNMP_PATROL 8161
+#define SNMP_NUM_PROCEDURES 8
+
+/* Initialize the protocol and registered fields */
+static int snmp_tap = -1;
+static int proto_snmp = -1;
+static int proto_smux = -1;
+
+static gboolean display_oid = TRUE;
+static gboolean snmp_var_in_tree = TRUE;
+
+void proto_register_snmp(void);
+void proto_reg_handoff_snmp(void);
+void proto_register_smux(void);
+void proto_reg_handoff_smux(void);
+
+static void snmp_usm_password_to_key(const snmp_usm_auth_model_t model, const guint8 *password, guint passwordlen,
+ const guint8 *engineID, guint engineLength, guint8 *key);
+
+static tvbuff_t* snmp_usm_priv_des(snmp_usm_params_t*, tvbuff_t*, packet_info *pinfo, gchar const**);
+static tvbuff_t* snmp_usm_priv_aes128(snmp_usm_params_t*, tvbuff_t*, packet_info *pinfo, gchar const**);
+static tvbuff_t* snmp_usm_priv_aes192(snmp_usm_params_t*, tvbuff_t*, packet_info *pinfo, gchar const**);
+static tvbuff_t* snmp_usm_priv_aes256(snmp_usm_params_t*, tvbuff_t*, packet_info *pinfo, gchar const**);
+
+static bool snmp_usm_auth(const packet_info *pinfo, const snmp_usm_auth_model_t model, snmp_usm_params_t* p, guint8**, guint*, gchar const**);
+
+static const value_string auth_types[] = {
+ {SNMP_USM_AUTH_MD5,"MD5"},
+ {SNMP_USM_AUTH_SHA1,"SHA1"},
+ {SNMP_USM_AUTH_SHA2_224,"SHA2-224"},
+ {SNMP_USM_AUTH_SHA2_256,"SHA2-256"},
+ {SNMP_USM_AUTH_SHA2_384,"SHA2-384"},
+ {SNMP_USM_AUTH_SHA2_512,"SHA2-512"},
+ {0,NULL}
+};
+
+static const guint auth_hash_len[] = {
+ HASH_MD5_LENGTH,
+ HASH_SHA1_LENGTH,
+ HASH_SHA2_224_LENGTH,
+ HASH_SHA2_256_LENGTH,
+ HASH_SHA2_384_LENGTH,
+ HASH_SHA2_512_LENGTH
+};
+
+static const guint auth_tag_len[] = {
+ 12,
+ 12,
+ 16,
+ 24,
+ 32,
+ 48
+};
+
+static const enum gcry_md_algos auth_hash_algo[] = {
+ GCRY_MD_MD5,
+ GCRY_MD_SHA1,
+ GCRY_MD_SHA224,
+ GCRY_MD_SHA256,
+ GCRY_MD_SHA384,
+ GCRY_MD_SHA512
+};
+
+#define PRIV_DES 0
+#define PRIV_AES128 1
+#define PRIV_AES192 2
+#define PRIV_AES256 3
+
+static const value_string priv_types[] = {
+ { PRIV_DES, "DES" },
+ { PRIV_AES128, "AES" },
+ { PRIV_AES192, "AES192" },
+ { PRIV_AES256, "AES256" },
+ { 0, NULL}
+};
+static snmp_usm_decoder_t priv_protos[] = {
+ snmp_usm_priv_des,
+ snmp_usm_priv_aes128,
+ snmp_usm_priv_aes192,
+ snmp_usm_priv_aes256
+};
+
+static snmp_ue_assoc_t* ueas = NULL;
+static guint num_ueas = 0;
+static snmp_ue_assoc_t* localized_ues = NULL;
+static snmp_ue_assoc_t* unlocalized_ues = NULL;
+/****/
+
+/* Variables used for handling enterprise specific trap types */
+typedef struct _snmp_st_assoc_t {
+ char *enterprise;
+ guint trap;
+ char *desc;
+} snmp_st_assoc_t;
+static guint num_specific_traps = 0;
+static snmp_st_assoc_t *specific_traps = NULL;
+static const char *enterprise_oid = NULL;
+static guint generic_trap = 0;
+static guint32 snmp_version = 0;
+static guint32 RequestID = -1;
+
+static snmp_usm_params_t usm_p = {FALSE,FALSE,0,0,0,0,NULL,NULL,NULL,NULL,NULL,NULL,NULL,FALSE};
+
+#define TH_AUTH 0x01
+#define TH_CRYPT 0x02
+#define TH_REPORT 0x04
+
+/* desegmentation of SNMP-over-TCP */
+static gboolean snmp_desegment = TRUE;
+
+/* Global variables */
+
+guint32 MsgSecurityModel;
+tvbuff_t *oid_tvb=NULL;
+tvbuff_t *value_tvb=NULL;
+
+static dissector_handle_t snmp_handle;
+static dissector_handle_t snmp_tcp_handle;
+static dissector_handle_t data_handle;
+static dissector_handle_t smux_handle;
+
+static next_tvb_list_t *var_list;
+
+static int hf_snmp_response_in = -1;
+static int hf_snmp_response_to = -1;
+static int hf_snmp_time = -1;
+
+static int hf_snmp_v3_flags_auth = -1;
+static int hf_snmp_v3_flags_crypt = -1;
+static int hf_snmp_v3_flags_report = -1;
+
+static int hf_snmp_engineid_conform = -1;
+static int hf_snmp_engineid_enterprise = -1;
+static int hf_snmp_engineid_format = -1;
+static int hf_snmp_engineid_ipv4 = -1;
+static int hf_snmp_engineid_ipv6 = -1;
+static int hf_snmp_engineid_cisco_type = -1;
+static int hf_snmp_engineid_mac = -1;
+static int hf_snmp_engineid_text = -1;
+static int hf_snmp_engineid_time = -1;
+static int hf_snmp_engineid_data = -1;
+static int hf_snmp_decryptedPDU = -1;
+static int hf_snmp_msgAuthentication = -1;
+
+static int hf_snmp_noSuchObject = -1;
+static int hf_snmp_noSuchInstance = -1;
+static int hf_snmp_endOfMibView = -1;
+static int hf_snmp_unSpecified = -1;
+
+static int hf_snmp_integer32_value = -1;
+static int hf_snmp_octetstring_value = -1;
+static int hf_snmp_oid_value = -1;
+static int hf_snmp_null_value = -1;
+static int hf_snmp_ipv4_value = -1;
+static int hf_snmp_ipv6_value = -1;
+static int hf_snmp_anyaddress_value = -1;
+static int hf_snmp_unsigned32_value = -1;
+static int hf_snmp_unknown_value = -1;
+static int hf_snmp_opaque_value = -1;
+static int hf_snmp_nsap_value = -1;
+static int hf_snmp_counter_value = -1;
+static int hf_snmp_timeticks_value = -1;
+static int hf_snmp_big_counter_value = -1;
+static int hf_snmp_gauge32_value = -1;
+
+static int hf_snmp_objectname = -1;
+static int hf_snmp_scalar_instance_index = -1;
+
+static int hf_snmp_var_bind_str = -1;
+static int hf_snmp_agentid_trailer = -1;
+
+static int hf_snmp_SMUX_PDUs_PDU = -1; /* SMUX_PDUs */
+static int hf_snmp_version = -1; /* Version */
+static int hf_snmp_community = -1; /* Community */
+static int hf_snmp_data = -1; /* PDUs */
+static int hf_snmp_parameters = -1; /* OCTET_STRING */
+static int hf_snmp_datav2u = -1; /* T_datav2u */
+static int hf_snmp_v2u_plaintext = -1; /* PDUs */
+static int hf_snmp_encrypted = -1; /* OCTET_STRING */
+static int hf_snmp_msgAuthoritativeEngineID = -1; /* T_msgAuthoritativeEngineID */
+static int hf_snmp_msgAuthoritativeEngineBoots = -1; /* T_msgAuthoritativeEngineBoots */
+static int hf_snmp_msgAuthoritativeEngineTime = -1; /* T_msgAuthoritativeEngineTime */
+static int hf_snmp_msgUserName = -1; /* T_msgUserName */
+static int hf_snmp_msgAuthenticationParameters = -1; /* T_msgAuthenticationParameters */
+static int hf_snmp_msgPrivacyParameters = -1; /* T_msgPrivacyParameters */
+static int hf_snmp_msgVersion = -1; /* Version */
+static int hf_snmp_msgGlobalData = -1; /* HeaderData */
+static int hf_snmp_msgSecurityParameters = -1; /* T_msgSecurityParameters */
+static int hf_snmp_msgData = -1; /* ScopedPduData */
+static int hf_snmp_msgID = -1; /* INTEGER_0_2147483647 */
+static int hf_snmp_msgMaxSize = -1; /* INTEGER_484_2147483647 */
+static int hf_snmp_msgFlags = -1; /* T_msgFlags */
+static int hf_snmp_msgSecurityModel = -1; /* T_msgSecurityModel */
+static int hf_snmp_plaintext = -1; /* ScopedPDU */
+static int hf_snmp_encryptedPDU = -1; /* T_encryptedPDU */
+static int hf_snmp_contextEngineID = -1; /* SnmpEngineID */
+static int hf_snmp_contextName = -1; /* OCTET_STRING */
+static int hf_snmp_get_request = -1; /* GetRequest_PDU */
+static int hf_snmp_get_next_request = -1; /* GetNextRequest_PDU */
+static int hf_snmp_get_response = -1; /* GetResponse_PDU */
+static int hf_snmp_set_request = -1; /* SetRequest_PDU */
+static int hf_snmp_trap = -1; /* Trap_PDU */
+static int hf_snmp_getBulkRequest = -1; /* GetBulkRequest_PDU */
+static int hf_snmp_informRequest = -1; /* InformRequest_PDU */
+static int hf_snmp_snmpV2_trap = -1; /* SNMPv2_Trap_PDU */
+static int hf_snmp_report = -1; /* Report_PDU */
+static int hf_snmp_request_id = -1; /* T_request_id */
+static int hf_snmp_error_status = -1; /* T_error_status */
+static int hf_snmp_error_index = -1; /* INTEGER */
+static int hf_snmp_variable_bindings = -1; /* VarBindList */
+static int hf_snmp_bulkPDU_request_id = -1; /* Integer32 */
+static int hf_snmp_non_repeaters = -1; /* INTEGER_0_2147483647 */
+static int hf_snmp_max_repetitions = -1; /* INTEGER_0_2147483647 */
+static int hf_snmp_enterprise = -1; /* EnterpriseOID */
+static int hf_snmp_agent_addr = -1; /* NetworkAddress */
+static int hf_snmp_generic_trap = -1; /* GenericTrap */
+static int hf_snmp_specific_trap = -1; /* SpecificTrap */
+static int hf_snmp_time_stamp = -1; /* TimeTicks */
+static int hf_snmp_name = -1; /* ObjectName */
+static int hf_snmp_valueType = -1; /* ValueType */
+static int hf_snmp_VarBindList_item = -1; /* VarBind */
+static int hf_snmp_open = -1; /* OpenPDU */
+static int hf_snmp_close = -1; /* ClosePDU */
+static int hf_snmp_registerRequest = -1; /* RReqPDU */
+static int hf_snmp_registerResponse = -1; /* RegisterResponse */
+static int hf_snmp_commitOrRollback = -1; /* SOutPDU */
+static int hf_snmp_rRspPDU = -1; /* RRspPDU */
+static int hf_snmp_pDUs = -1; /* PDUs */
+static int hf_snmp_smux_simple = -1; /* SimpleOpen */
+static int hf_snmp_smux_version = -1; /* T_smux_version */
+static int hf_snmp_identity = -1; /* OBJECT_IDENTIFIER */
+static int hf_snmp_description = -1; /* DisplayString */
+static int hf_snmp_password = -1; /* OCTET_STRING */
+static int hf_snmp_subtree = -1; /* ObjectName */
+static int hf_snmp_priority = -1; /* INTEGER_M1_2147483647 */
+static int hf_snmp_operation = -1; /* T_operation */
+
+/* Initialize the subtree pointers */
+static gint ett_smux = -1;
+static gint ett_snmp = -1;
+static gint ett_engineid = -1;
+static gint ett_msgFlags = -1;
+static gint ett_encryptedPDU = -1;
+static gint ett_decrypted = -1;
+static gint ett_authParameters = -1;
+static gint ett_internet = -1;
+static gint ett_varbind = -1;
+static gint ett_name = -1;
+static gint ett_value = -1;
+static gint ett_decoding_error = -1;
+
+static gint ett_snmp_Message = -1;
+static gint ett_snmp_Messagev2u = -1;
+static gint ett_snmp_T_datav2u = -1;
+static gint ett_snmp_UsmSecurityParameters = -1;
+static gint ett_snmp_SNMPv3Message = -1;
+static gint ett_snmp_HeaderData = -1;
+static gint ett_snmp_ScopedPduData = -1;
+static gint ett_snmp_ScopedPDU = -1;
+static gint ett_snmp_PDUs = -1;
+static gint ett_snmp_PDU = -1;
+static gint ett_snmp_BulkPDU = -1;
+static gint ett_snmp_Trap_PDU_U = -1;
+static gint ett_snmp_VarBind = -1;
+static gint ett_snmp_VarBindList = -1;
+static gint ett_snmp_SMUX_PDUs = -1;
+static gint ett_snmp_RegisterResponse = -1;
+static gint ett_snmp_OpenPDU = -1;
+static gint ett_snmp_SimpleOpen_U = -1;
+static gint ett_snmp_RReqPDU_U = -1;
+
+static expert_field ei_snmp_failed_decrypted_data_pdu = EI_INIT;
+static expert_field ei_snmp_decrypted_data_bad_formatted = EI_INIT;
+static expert_field ei_snmp_verify_authentication_error = EI_INIT;
+static expert_field ei_snmp_authentication_ok = EI_INIT;
+static expert_field ei_snmp_authentication_error = EI_INIT;
+static expert_field ei_snmp_varbind_not_uni_class_seq = EI_INIT;
+static expert_field ei_snmp_varbind_has_indicator = EI_INIT;
+static expert_field ei_snmp_objectname_not_oid = EI_INIT;
+static expert_field ei_snmp_objectname_has_indicator = EI_INIT;
+static expert_field ei_snmp_value_not_primitive_encoding = EI_INIT;
+static expert_field ei_snmp_invalid_oid = EI_INIT;
+static expert_field ei_snmp_varbind_wrong_tag = EI_INIT;
+static expert_field ei_snmp_varbind_response = EI_INIT;
+static expert_field ei_snmp_no_instance_subid = EI_INIT;
+static expert_field ei_snmp_wrong_num_of_subids = EI_INIT;
+static expert_field ei_snmp_index_suboid_too_short = EI_INIT;
+static expert_field ei_snmp_unimplemented_instance_index = EI_INIT;
+static expert_field ei_snmp_index_suboid_len0 = EI_INIT;
+static expert_field ei_snmp_index_suboid_too_long = EI_INIT;
+static expert_field ei_snmp_index_string_too_long = EI_INIT;
+static expert_field ei_snmp_column_parent_not_row = EI_INIT;
+static expert_field ei_snmp_uint_too_large = EI_INIT;
+static expert_field ei_snmp_int_too_large = EI_INIT;
+static expert_field ei_snmp_integral_value0 = EI_INIT;
+static expert_field ei_snmp_missing_mib = EI_INIT;
+static expert_field ei_snmp_varbind_wrong_length_value = EI_INIT;
+static expert_field ei_snmp_varbind_wrong_class_tag = EI_INIT;
+static expert_field ei_snmp_rfc1910_non_conformant = EI_INIT;
+static expert_field ei_snmp_rfc3411_non_conformant = EI_INIT;
+static expert_field ei_snmp_version_unknown = EI_INIT;
+static expert_field ei_snmp_trap_pdu_obsolete = EI_INIT;
+
+static const true_false_string auth_flags = {
+ "OK",
+ "Failed"
+};
+
+/* Security Models */
+
+#define SNMP_SEC_ANY 0
+#define SNMP_SEC_V1 1
+#define SNMP_SEC_V2C 2
+#define SNMP_SEC_USM 3
+
+static const value_string sec_models[] = {
+ { SNMP_SEC_ANY, "Any" },
+ { SNMP_SEC_V1, "V1" },
+ { SNMP_SEC_V2C, "V2C" },
+ { SNMP_SEC_USM, "USM" },
+ { 0, NULL }
+};
+
+#if 0
+/* SMUX PDU types */
+#define SMUX_MSG_OPEN 0
+#define SMUX_MSG_CLOSE 1
+#define SMUX_MSG_RREQ 2
+#define SMUX_MSG_RRSP 3
+#define SMUX_MSG_SOUT 4
+
+static const value_string smux_types[] = {
+ { SMUX_MSG_OPEN, "Open" },
+ { SMUX_MSG_CLOSE, "Close" },
+ { SMUX_MSG_RREQ, "Registration Request" },
+ { SMUX_MSG_RRSP, "Registration Response" },
+ { SMUX_MSG_SOUT, "Commit Or Rollback" },
+ { 0, NULL }
+};
+#endif
+
+/* Procedure names (used in Service Response Time) */
+const value_string snmp_procedure_names[] = {
+ { 0, "Get" },
+ { 1, "GetNext" },
+ { 3, "Set" },
+ { 4, "Register" },
+ { 5, "Bulk" },
+ { 6, "Inform" },
+ { 0, NULL }
+};
+
+#define SNMP_IPA 0 /* IP Address */
+#define SNMP_CNT 1 /* Counter (Counter32) */
+#define SNMP_GGE 2 /* Gauge (Gauge32) */
+#define SNMP_TIT 3 /* TimeTicks */
+#define SNMP_OPQ 4 /* Opaque */
+#define SNMP_NSP 5 /* NsapAddress */
+#define SNMP_C64 6 /* Counter64 */
+#define SNMP_U32 7 /* Uinteger32 */
+
+#define SERR_NSO 0
+#define SERR_NSI 1
+#define SERR_EOM 2
+
+
+dissector_table_t value_sub_dissectors_table;
+
+/*
+ * Data structure attached to a conversation, request/response information
+ */
+typedef struct snmp_conv_info_t {
+ wmem_map_t *request_response;
+} snmp_conv_info_t;
+
+static snmp_conv_info_t*
+snmp_find_conversation_and_get_conv_data(packet_info *pinfo);
+
+static snmp_request_response_t *
+snmp_get_request_response_pointer(wmem_map_t *map, guint32 requestId)
+{
+ snmp_request_response_t *srrp=(snmp_request_response_t *)wmem_map_lookup(map, &requestId);
+ if (!srrp) {
+ srrp=wmem_new0(wmem_file_scope(), snmp_request_response_t);
+ srrp->requestId=requestId;
+ wmem_map_insert(map, &(srrp->requestId), (void *)srrp);
+ }
+
+ return srrp;
+}
+
+static snmp_request_response_t*
+snmp_match_request_response(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, guint requestId, guint procedure_id, snmp_conv_info_t *snmp_info)
+{
+ snmp_request_response_t *srrp=NULL;
+
+ DISSECTOR_ASSERT_HINT(snmp_info, "No SNMP info from ASN1 context");
+
+ /* get or create request/response pointer based on request id */
+ srrp=(snmp_request_response_t *)snmp_get_request_response_pointer(snmp_info->request_response, requestId);
+
+ // if not visited fill the request/response data
+ if (!PINFO_FD_VISITED(pinfo)) {
+ switch(procedure_id)
+ {
+ case SNMP_REQ_GET:
+ case SNMP_REQ_GETNEXT:
+ case SNMP_REQ_SET:
+ case SNMP_REQ_GETBULK:
+ case SNMP_REQ_INFORM:
+ srrp->request_frame_id=pinfo->fd->num;
+ srrp->response_frame_id=0;
+ srrp->request_time=pinfo->abs_ts;
+ srrp->request_procedure_id=procedure_id;
+ break;
+ case SNMP_RES_GET:
+ srrp->response_frame_id=pinfo->fd->num;
+ break;
+ default:
+ return NULL;
+ }
+ }
+
+ /* if request and response was matched */
+ if (srrp->request_frame_id!=0 && srrp->response_frame_id!=0)
+ {
+ proto_item *it;
+
+ // if it is a request
+ if (srrp->request_frame_id == pinfo->fd->num)
+ {
+ it=proto_tree_add_uint(tree, hf_snmp_response_in, tvb, 0, 0, srrp->response_frame_id);
+ proto_item_set_generated(it);
+ } else {
+ nstime_t ns;
+ it=proto_tree_add_uint(tree, hf_snmp_response_to, tvb, 0, 0, srrp->request_frame_id);
+ proto_item_set_generated(it);
+ nstime_delta(&ns, &pinfo->abs_ts, &srrp->request_time);
+ it=proto_tree_add_time(tree, hf_snmp_time, tvb, 0, 0, &ns);
+ proto_item_set_generated(it);
+
+ return srrp;
+ }
+ }
+
+ return NULL;
+}
+
+static void
+snmpstat_init(struct register_srt* srt _U_, GArray* srt_array)
+{
+ srt_stat_table *snmp_srt_table;
+ guint32 i;
+
+ snmp_srt_table = init_srt_table("SNMP Commands", NULL, srt_array, SNMP_NUM_PROCEDURES, NULL, "snmp.data", NULL);
+ for (i = 0; i < SNMP_NUM_PROCEDURES; i++)
+ {
+ init_srt_table_row(snmp_srt_table, i, val_to_str_const(i, snmp_procedure_names, "<unknown>"));
+ }
+}
+
+/* This is called only if request and response was matched -> no need to return anything than TAP_PACKET_REDRAW */
+static tap_packet_status
+snmpstat_packet(void *psnmp, packet_info *pinfo, epan_dissect_t *edt _U_, const void *psi, tap_flags_t flags _U_)
+{
+ guint i = 0;
+ srt_stat_table *snmp_srt_table;
+ const snmp_request_response_t *snmp=(const snmp_request_response_t *)psi;
+ srt_data_t *data = (srt_data_t *)psnmp;
+
+ snmp_srt_table = g_array_index(data->srt_array, srt_stat_table*, i);
+
+ add_srt_table_data(snmp_srt_table, snmp->request_procedure_id, &snmp->request_time, pinfo);
+ return TAP_PACKET_REDRAW;
+}
+
+static const gchar *
+snmp_lookup_specific_trap (guint specific_trap)
+{
+ guint i;
+
+ for (i = 0; i < num_specific_traps; i++) {
+ snmp_st_assoc_t *u = &(specific_traps[i]);
+
+ if ((u->trap == specific_trap) &&
+ (strcmp (u->enterprise, enterprise_oid) == 0))
+ {
+ return u->desc;
+ }
+ }
+
+ return NULL;
+}
+
+static int
+dissect_snmp_variable_string(tvbuff_t *tvb, packet_info *pinfo _U_, proto_tree *tree, void *data _U_)
+{
+
+ proto_tree_add_item(tree, hf_snmp_var_bind_str, tvb, 0, -1, ENC_ASCII);
+
+ return tvb_captured_length(tvb);
+}
+
+/*
+DateAndTime ::= TEXTUAL-CONVENTION
+ DISPLAY-HINT "2d-1d-1d,1d:1d:1d.1d,1a1d:1d"
+ STATUS current
+ DESCRIPTION
+ "A date-time specification.
+
+ field octets contents range
+ ----- ------ -------- -----
+ 1 1-2 year* 0..65536
+ 2 3 month 1..12
+ 3 4 day 1..31
+ 4 5 hour 0..23
+ 5 6 minutes 0..59
+ 6 7 seconds 0..60
+ (use 60 for leap-second)
+ 7 8 deci-seconds 0..9
+ 8 9 direction from UTC '+' / '-'
+ 9 10 hours from UTC* 0..13
+ 10 11 minutes from UTC 0..59
+
+ * Notes:
+ - the value of year is in network-byte order
+ - daylight saving time in New Zealand is +13
+
+ For example, Tuesday May 26, 1992 at 1:30:15 PM EDT would be
+ displayed as:
+
+ 1992-5-26,13:30:15.0,-4:0
+
+ Note that if only local time is known, then timezone
+ information (fields 8-10) is not present."
+ SYNTAX OCTET STRING (SIZE (8 | 11))
+*/
+static proto_item *
+dissect_snmp_variable_date_and_time(proto_tree *tree, packet_info *pinfo, int hfid, tvbuff_t *tvb, int offset, int length)
+{
+ guint16 year;
+ guint8 month;
+ guint8 day;
+ guint8 hour;
+ guint8 minutes;
+ guint8 seconds;
+ guint8 deci_seconds;
+ guint8 hour_from_utc;
+ guint8 min_from_utc;
+ gchar *str;
+
+ year = tvb_get_ntohs(tvb,offset);
+ month = tvb_get_guint8(tvb,offset+2);
+ day = tvb_get_guint8(tvb,offset+3);
+ hour = tvb_get_guint8(tvb,offset+4);
+ minutes = tvb_get_guint8(tvb,offset+5);
+ seconds = tvb_get_guint8(tvb,offset+6);
+ deci_seconds = tvb_get_guint8(tvb,offset+7);
+ if(length > 8){
+ hour_from_utc = tvb_get_guint8(tvb,offset+9);
+ min_from_utc = tvb_get_guint8(tvb,offset+10);
+
+ str = wmem_strdup_printf(pinfo->pool,
+ "%u-%u-%u, %u:%u:%u.%u UTC %s%u:%u",
+ year,
+ month,
+ day,
+ hour,
+ minutes,
+ seconds,
+ deci_seconds,
+ tvb_get_string_enc(pinfo->pool,tvb,offset+8,1,ENC_ASCII|ENC_NA),
+ hour_from_utc,
+ min_from_utc);
+ }else{
+ str = wmem_strdup_printf(pinfo->pool,
+ "%u-%u-%u, %u:%u:%u.%u",
+ year,
+ month,
+ day,
+ hour,
+ minutes,
+ seconds,
+ deci_seconds);
+ }
+
+ return proto_tree_add_string(tree, hfid, tvb, offset, length, str);
+
+}
+
+/*
+ * dissect_snmp_VarBind
+ * this routine dissects variable bindings, looking for the oid information in our oid reporsitory
+ * to format and add the value adequatelly.
+ *
+ * The choice to handwrite this code instead of using the asn compiler is to avoid having tons
+ * of uses of global variables distributed in very different parts of the code.
+ * Other than that there's a cosmetic thing: the tree from ASN generated code would be so
+ * convoluted due to the nesting of CHOICEs in the definition of VarBind/value.
+ *
+ * XXX: the length of this function (~400 lines) is an aberration!
+ * oid_key_t:key_type could become a series of callbacks instead of an enum
+ * the (! oid_info_is_ok) switch could be made into an array (would be slower)
+ *
+
+ NetworkAddress ::= CHOICE { internet IpAddress }
+ IpAddress ::= [APPLICATION 0] IMPLICIT OCTET STRING (SIZE (4))
+ TimeTicks ::= [APPLICATION 3] IMPLICIT INTEGER (0..4294967295)
+ Integer32 ::= INTEGER (-2147483648..2147483647)
+ ObjectName ::= OBJECT IDENTIFIER
+ Counter32 ::= [APPLICATION 1] IMPLICIT INTEGER (0..4294967295)
+ Gauge32 ::= [APPLICATION 2] IMPLICIT INTEGER (0..4294967295)
+ Unsigned32 ::= [APPLICATION 2] IMPLICIT INTEGER (0..4294967295)
+ Integer-value ::= INTEGER (-2147483648..2147483647)
+ Integer32 ::= INTEGER (-2147483648..2147483647)
+ ObjectID-value ::= OBJECT IDENTIFIER
+ Empty ::= NULL
+ TimeTicks ::= [APPLICATION 3] IMPLICIT INTEGER (0..4294967295)
+ Opaque ::= [APPLICATION 4] IMPLICIT OCTET STRING
+ Counter64 ::= [APPLICATION 6] IMPLICIT INTEGER (0..18446744073709551615)
+
+ ObjectSyntax ::= CHOICE {
+ simple SimpleSyntax,
+ application-wide ApplicationSyntax
+ }
+
+ SimpleSyntax ::= CHOICE {
+ integer-value Integer-value,
+ string-value String-value,
+ objectID-value ObjectID-value,
+ empty Empty
+ }
+
+ ApplicationSyntax ::= CHOICE {
+ ipAddress-value IpAddress,
+ counter-value Counter32,
+ timeticks-value TimeTicks,
+ arbitrary-value Opaque,
+ big-counter-value Counter64,
+ unsigned-integer-value Unsigned32
+ }
+
+ ValueType ::= CHOICE {
+ value ObjectSyntax,
+ unSpecified NULL,
+ noSuchObject[0] IMPLICIT NULL,
+ noSuchInstance[1] IMPLICIT NULL,
+ endOfMibView[2] IMPLICIT NULL
+ }
+
+ VarBind ::= SEQUENCE {
+ name ObjectName,
+ valueType ValueType
+ }
+
+ */
+
+static int
+dissect_snmp_VarBind(bool implicit_tag _U_, tvbuff_t *tvb, int offset,
+ asn1_ctx_t *actx, proto_tree *tree, int hf_index _U_)
+{
+ int seq_offset, name_offset, value_offset, value_start;
+ guint32 seq_len, name_len, value_len;
+ gint8 ber_class;
+ bool pc;
+ gint32 tag;
+ bool ind;
+ guint32* subids;
+ guint8* oid_bytes;
+ oid_info_t* oid_info = NULL;
+ guint oid_matched, oid_left;
+ proto_item *pi_name, *pi_varbind, *pi_value = NULL;
+ proto_tree *pt, *pt_varbind, *pt_name, *pt_value;
+ char label[ITEM_LABEL_LENGTH];
+ const char* repr = NULL;
+ const char* info_oid = NULL;
+ char* valstr;
+ int hfid = -1;
+ int min_len = 0, max_len = 0;
+ bool oid_info_is_ok;
+ const char* oid_string = NULL;
+ enum {BER_NO_ERROR, BER_WRONG_LENGTH, BER_WRONG_TAG} format_error = BER_NO_ERROR;
+
+ seq_offset = offset;
+
+ /* first have the VarBind's sequence header */
+ offset = dissect_ber_identifier(actx->pinfo, tree, tvb, offset, &ber_class, &pc, &tag);
+ offset = dissect_ber_length(actx->pinfo, tree, tvb, offset, &seq_len, &ind);
+
+ if (!pc && ber_class==BER_CLASS_UNI && tag==BER_UNI_TAG_SEQUENCE) {
+ proto_item* pi;
+ pt = proto_tree_add_subtree(tree, tvb, seq_offset, seq_len + (offset - seq_offset),
+ ett_decoding_error, &pi, "VarBind must be an universal class sequence");
+ expert_add_info(actx->pinfo, pi, &ei_snmp_varbind_not_uni_class_seq);
+ return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
+ }
+
+ if (ind) {
+ proto_item* pi;
+ pt = proto_tree_add_subtree(tree, tvb, seq_offset, seq_len + (offset - seq_offset),
+ ett_decoding_error, &pi, "Indicator must be clear in VarBind");
+ expert_add_info(actx->pinfo, pi, &ei_snmp_varbind_has_indicator);
+ return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
+ }
+
+ /* we add the varbind tree root with a dummy label we'll fill later on */
+ pt_varbind = proto_tree_add_subtree(tree,tvb,offset,seq_len,ett_varbind,&pi_varbind,"VarBind");
+ *label = '\0';
+
+ seq_len += offset - seq_offset;
+
+ /* then we have the ObjectName's header */
+
+ offset = dissect_ber_identifier(actx->pinfo, pt_varbind, tvb, offset, &ber_class, &pc, &tag);
+ name_offset = offset = dissect_ber_length(actx->pinfo, pt_varbind, tvb, offset, &name_len, &ind);
+
+ if (! ( !pc && ber_class==BER_CLASS_UNI && tag==BER_UNI_TAG_OID) ) {
+ proto_item* pi;
+ pt = proto_tree_add_subtree(tree, tvb, seq_offset, seq_len,
+ ett_decoding_error, &pi, "ObjectName must be an OID in primitive encoding");
+ expert_add_info(actx->pinfo, pi, &ei_snmp_objectname_not_oid);
+ return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
+ }
+
+ if (ind) {
+ proto_item* pi;
+ pt = proto_tree_add_subtree(tree, tvb, seq_offset, seq_len,
+ ett_decoding_error, &pi, "Indicator must be clear in ObjectName");
+ expert_add_info(actx->pinfo, pi, &ei_snmp_objectname_has_indicator);
+ return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
+ }
+
+ pi_name = proto_tree_add_item(pt_varbind,hf_snmp_objectname,tvb,name_offset,name_len,ENC_NA);
+ pt_name = proto_item_add_subtree(pi_name,ett_name);
+
+ offset += name_len;
+ value_start = offset;
+ /* then we have the value's header */
+ offset = dissect_ber_identifier(actx->pinfo, pt_varbind, tvb, offset, &ber_class, &pc, &tag);
+ value_offset = dissect_ber_length(actx->pinfo, pt_varbind, tvb, offset, &value_len, &ind);
+
+ if (! (!pc) ) {
+ proto_item* pi;
+ pt = proto_tree_add_subtree(pt_varbind, tvb, value_start, value_len,
+ ett_decoding_error, &pi, "the value must be in primitive encoding");
+ expert_add_info(actx->pinfo, pi, &ei_snmp_value_not_primitive_encoding);
+ return dissect_unknown_ber(actx->pinfo, tvb, value_start, pt);
+ }
+
+ /* Now, we know where everithing is */
+
+ /* fetch ObjectName and its relative oid_info */
+ oid_bytes = (guint8*)tvb_memdup(actx->pinfo->pool, tvb, name_offset, name_len);
+ oid_info = oid_get_from_encoded(actx->pinfo->pool, oid_bytes, name_len, &subids, &oid_matched, &oid_left);
+
+ add_oid_debug_subtree(oid_info,pt_name);
+
+ if (!subids) {
+ proto_item* pi;
+
+ repr = oid_encoded2string(actx->pinfo->pool, oid_bytes, name_len);
+ pt = proto_tree_add_subtree_format(pt_name,tvb, 0, 0, ett_decoding_error, &pi, "invalid oid: %s", repr);
+ expert_add_info_format(actx->pinfo, pi, &ei_snmp_invalid_oid, "invalid oid: %s", repr);
+ return dissect_unknown_ber(actx->pinfo, tvb, name_offset, pt);
+ }
+
+ if (oid_matched+oid_left) {
+ oid_string = oid_subid2string(actx->pinfo->pool, subids,oid_matched+oid_left);
+ }
+
+ if (ber_class == BER_CLASS_CON) {
+ /* if we have an error value just add it and get out the way ASAP */
+ proto_item* pi;
+ const char* note;
+
+ if (value_len != 0) {
+ min_len = max_len = 0;
+ format_error = BER_WRONG_LENGTH;
+ }
+
+ switch (tag) {
+ case SERR_NSO:
+ hfid = hf_snmp_noSuchObject;
+ note = "noSuchObject";
+ break;
+ case SERR_NSI:
+ hfid = hf_snmp_noSuchInstance;
+ note = "noSuchInstance";
+ break;
+ case SERR_EOM:
+ hfid = hf_snmp_endOfMibView;
+ note = "endOfMibView";
+ break;
+ default: {
+ pt = proto_tree_add_subtree_format(pt_varbind,tvb,0,0,ett_decoding_error,&pi,
+ "Wrong tag for Error Value: expected 0, 1, or 2 but got: %d",tag);
+ expert_add_info(actx->pinfo, pi, &ei_snmp_varbind_wrong_tag);
+ return dissect_unknown_ber(actx->pinfo, tvb, value_start, pt);
+ }
+ }
+
+ pi = proto_tree_add_item(pt_varbind,hfid,tvb,value_offset,value_len,ENC_BIG_ENDIAN);
+ expert_add_info_format(actx->pinfo, pi, &ei_snmp_varbind_response, "%s",note);
+ (void) g_strlcpy (label, note, ITEM_LABEL_LENGTH);
+ goto set_label;
+ }
+
+ /* 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 */
+ switch (oid_info->kind) {
+ case OID_KIND_SCALAR:
+ if (oid_left == 1) {
+ /* OK: we got the instance sub-id */
+ proto_tree_add_uint64(pt_name,hf_snmp_scalar_instance_index,tvb,name_offset,name_len,subids[oid_matched]);
+ oid_info_is_ok = TRUE;
+ goto indexing_done;
+ } else if (oid_left == 0) {
+ if (ber_class == BER_CLASS_UNI && tag == BER_UNI_TAG_NULL) {
+ /* unSpecified does not require an instance sub-id add the new value and get off the way! */
+ pi_value = proto_tree_add_item(pt_varbind,hf_snmp_unSpecified,tvb,value_offset,value_len,ENC_NA);
+ goto set_label;
+ } else {
+ proto_tree_add_expert(pt_name,actx->pinfo,&ei_snmp_no_instance_subid,tvb,0,0);
+ oid_info_is_ok = FALSE;
+ goto indexing_done;
+ }
+ } else {
+ proto_tree_add_expert_format(pt_name,actx->pinfo,&ei_snmp_wrong_num_of_subids,tvb,0,0,"A scalar should have only one instance sub-id this has: %d",oid_left);
+ oid_info_is_ok = FALSE;
+ goto indexing_done;
+ }
+ break;
+ case OID_KIND_COLUMN:
+ if ( oid_info->parent->kind == OID_KIND_ROW) {
+ oid_key_t* k = oid_info->parent->key;
+ guint key_start = oid_matched;
+ guint key_len = oid_left;
+ oid_info_is_ok = TRUE;
+
+ if ( key_len == 0 && ber_class == BER_CLASS_UNI && tag == BER_UNI_TAG_NULL) {
+ /* unSpecified does not require an instance sub-id add the new value and get off the way! */
+ pi_value = proto_tree_add_item(pt_varbind,hf_snmp_unSpecified,tvb,value_offset,value_len,ENC_NA);
+ goto set_label;
+ }
+
+ if (k) {
+ for (;k;k = k->next) {
+ guint suboid_len;
+
+ if (key_start >= oid_matched+oid_left) {
+ proto_tree_add_expert(pt_name,actx->pinfo,&ei_snmp_index_suboid_too_short,tvb,0,0);
+ oid_info_is_ok = FALSE;
+ goto indexing_done;
+ }
+
+ switch(k->key_type) {
+ case OID_KEY_TYPE_WRONG: {
+ proto_tree_add_expert(pt_name,actx->pinfo,&ei_snmp_unimplemented_instance_index,tvb,0,0);
+ oid_info_is_ok = FALSE;
+ goto indexing_done;
+ }
+ case OID_KEY_TYPE_INTEGER: {
+ if (FT_IS_INT(k->ft_type)) {
+ proto_tree_add_int(pt_name,k->hfid,tvb,name_offset,name_len,(guint)subids[key_start]);
+ } else { /* if it's not an unsigned int let proto_tree_add_uint throw a warning */
+ proto_tree_add_uint64(pt_name,k->hfid,tvb,name_offset,name_len,(guint)subids[key_start]);
+ }
+ key_start++;
+ key_len--;
+ continue; /* k->next */
+ }
+ case OID_KEY_TYPE_IMPLIED_OID:
+ suboid_len = key_len;
+
+ goto show_oid_index;
+
+ case OID_KEY_TYPE_OID: {
+ guint8* suboid_buf;
+ guint suboid_buf_len;
+ guint32* suboid;
+
+ suboid_len = subids[key_start++];
+ key_len--;
+
+show_oid_index:
+ suboid = &(subids[key_start]);
+
+ if( suboid_len == 0 ) {
+ proto_tree_add_expert(pt_name,actx->pinfo,&ei_snmp_index_suboid_len0,tvb,0,0);
+ oid_info_is_ok = FALSE;
+ goto indexing_done;
+ }
+
+ if( key_len < suboid_len ) {
+ proto_tree_add_expert(pt_name,actx->pinfo,&ei_snmp_index_suboid_too_long,tvb,0,0);
+ oid_info_is_ok = FALSE;
+ goto indexing_done;
+ }
+
+ suboid_buf_len = oid_subid2encoded(actx->pinfo->pool, suboid_len, suboid, &suboid_buf);
+
+ DISSECTOR_ASSERT(suboid_buf_len);
+
+ proto_tree_add_oid(pt_name,k->hfid,tvb,name_offset, suboid_buf_len, suboid_buf);
+
+ key_start += suboid_len;
+ key_len -= suboid_len + 1;
+ continue; /* k->next */
+ }
+ default: {
+ guint8* buf;
+ guint buf_len;
+ guint32* suboid;
+ guint i;
+
+
+ switch (k->key_type) {
+ case OID_KEY_TYPE_IPADDR:
+ suboid = &(subids[key_start]);
+ buf_len = 4;
+ break;
+ case OID_KEY_TYPE_IMPLIED_STRING:
+ case OID_KEY_TYPE_IMPLIED_BYTES:
+ case OID_KEY_TYPE_ETHER:
+ suboid = &(subids[key_start]);
+ buf_len = key_len;
+ break;
+ default:
+ buf_len = k->num_subids;
+ suboid = &(subids[key_start]);
+
+ if(!buf_len) {
+ buf_len = *suboid++;
+ key_len--;
+ key_start++;
+ }
+ break;
+ }
+
+ if( key_len < buf_len ) {
+ proto_tree_add_expert(pt_name,actx->pinfo,&ei_snmp_index_string_too_long,tvb,0,0);
+ oid_info_is_ok = FALSE;
+ goto indexing_done;
+ }
+
+ buf = (guint8*)wmem_alloc(actx->pinfo->pool, buf_len+1);
+ for (i = 0; i < buf_len; i++)
+ buf[i] = (guint8)suboid[i];
+ buf[i] = '\0';
+
+ switch(k->key_type) {
+ case OID_KEY_TYPE_STRING:
+ case OID_KEY_TYPE_IMPLIED_STRING:
+ proto_tree_add_string(pt_name,k->hfid,tvb,name_offset,buf_len, buf);
+ break;
+ case OID_KEY_TYPE_BYTES:
+ case OID_KEY_TYPE_NSAP:
+ case OID_KEY_TYPE_IMPLIED_BYTES:
+ proto_tree_add_bytes(pt_name,k->hfid,tvb,name_offset,buf_len, buf);
+ break;
+ case OID_KEY_TYPE_ETHER:
+ proto_tree_add_ether(pt_name,k->hfid,tvb,name_offset,buf_len, buf);
+ break;
+ case OID_KEY_TYPE_IPADDR: {
+ guint32* ipv4_p = (guint32*)buf;
+ proto_tree_add_ipv4(pt_name,k->hfid,tvb,name_offset,buf_len, *ipv4_p);
+ }
+ break;
+ default:
+ DISSECTOR_ASSERT_NOT_REACHED();
+ break;
+ }
+
+ key_start += buf_len;
+ key_len -= buf_len;
+ continue; /* k->next*/
+ }
+ }
+ }
+ goto indexing_done;
+ } else {
+ proto_tree_add_expert(pt_name,actx->pinfo,&ei_snmp_unimplemented_instance_index,tvb,0,0);
+ oid_info_is_ok = FALSE;
+ goto indexing_done;
+ }
+ } else {
+ proto_tree_add_expert(pt_name,actx->pinfo,&ei_snmp_column_parent_not_row,tvb,0,0);
+ oid_info_is_ok = FALSE;
+ goto indexing_done;
+ }
+ default: {
+/* proto_tree_add_expert (pt_name,actx->pinfo,PI_MALFORMED, PI_WARN,tvb,0,0,"This kind OID should have no value"); */
+ oid_info_is_ok = FALSE;
+ goto indexing_done;
+ }
+ }
+indexing_done:
+
+ if (oid_info_is_ok && oid_info->value_type) {
+ if (ber_class == BER_CLASS_UNI && tag == BER_UNI_TAG_NULL) {
+ pi_value = proto_tree_add_item(pt_varbind,hf_snmp_unSpecified,tvb,value_offset,value_len,ENC_NA);
+ } else {
+ /* Provide a tree_item to attach errors to, if needed. */
+ pi_value = pi_name;
+
+ if ((oid_info->value_type->ber_class != BER_CLASS_ANY) &&
+ (ber_class != oid_info->value_type->ber_class))
+ format_error = BER_WRONG_TAG;
+ else if ((oid_info->value_type->ber_tag != BER_TAG_ANY) &&
+ (tag != oid_info->value_type->ber_tag))
+ format_error = BER_WRONG_TAG;
+ else {
+ max_len = oid_info->value_type->max_len == -1 ? 0xffffff : oid_info->value_type->max_len;
+ min_len = oid_info->value_type->min_len;
+
+ if ((int)value_len < min_len || (int)value_len > max_len)
+ format_error = BER_WRONG_LENGTH;
+ }
+
+ if (format_error == BER_NO_ERROR) {
+ /* Special case DATE AND TIME */
+ if((oid_info->value_type)&&(oid_info->value_type->keytype == OID_KEY_TYPE_DATE_AND_TIME)&&(value_len > 7)){
+ pi_value = dissect_snmp_variable_date_and_time(pt_varbind, actx->pinfo, oid_info->value_hfid, tvb, value_offset, value_len);
+ } else {
+ pi_value = proto_tree_add_item(pt_varbind,oid_info->value_hfid,tvb,value_offset,value_len,ENC_BIG_ENDIAN);
+ }
+ }
+ }
+ } else {
+ switch(ber_class|(tag<<4)) {
+ case BER_CLASS_UNI|(BER_UNI_TAG_INTEGER<<4):
+ {
+ gint64 val=0;
+ unsigned int int_val_offset = value_offset;
+ unsigned int i;
+
+ max_len = 4; min_len = 1;
+ if (value_len > (guint)max_len || value_len < (guint)min_len) {
+ hfid = hf_snmp_integer32_value;
+ format_error = BER_WRONG_LENGTH;
+ break;
+ }
+
+ if(value_len > 0) {
+ /* extend sign bit */
+ if(tvb_get_guint8(tvb, int_val_offset)&0x80) {
+ val=-1;
+ }
+ for(i=0;i<value_len;i++) {
+ val=(val<<8)|tvb_get_guint8(tvb, int_val_offset);
+ int_val_offset++;
+ }
+ }
+ pi_value = proto_tree_add_int64(pt_varbind, hf_snmp_integer32_value, tvb,value_offset,value_len, val);
+
+ goto already_added;
+ }
+ case BER_CLASS_UNI|(BER_UNI_TAG_OCTETSTRING<<4):
+ if(oid_info->value_hfid> -1){
+ hfid = oid_info->value_hfid;
+ }else{
+ hfid = hf_snmp_octetstring_value;
+ }
+ break;
+ case BER_CLASS_UNI|(BER_UNI_TAG_OID<<4):
+ max_len = -1; min_len = 1;
+ if (value_len < (guint)min_len) format_error = BER_WRONG_LENGTH;
+ hfid = hf_snmp_oid_value;
+ break;
+ case BER_CLASS_UNI|(BER_UNI_TAG_NULL<<4):
+ max_len = 0; min_len = 0;
+ if (value_len != 0) format_error = BER_WRONG_LENGTH;
+ hfid = hf_snmp_null_value;
+ break;
+ case BER_CLASS_APP: /* | (SNMP_IPA<<4)*/
+ switch(value_len) {
+ case 4: hfid = hf_snmp_ipv4_value; break;
+ case 16: hfid = hf_snmp_ipv6_value; break;
+ default: hfid = hf_snmp_anyaddress_value; break;
+ }
+ break;
+ case BER_CLASS_APP|(SNMP_U32<<4):
+ hfid = hf_snmp_unsigned32_value;
+ break;
+ case BER_CLASS_APP|(SNMP_GGE<<4):
+ hfid = hf_snmp_gauge32_value;
+ break;
+ case BER_CLASS_APP|(SNMP_CNT<<4):
+ hfid = hf_snmp_counter_value;
+ break;
+ case BER_CLASS_APP|(SNMP_TIT<<4):
+ hfid = hf_snmp_timeticks_value;
+ break;
+ case BER_CLASS_APP|(SNMP_OPQ<<4):
+ hfid = hf_snmp_opaque_value;
+ break;
+ case BER_CLASS_APP|(SNMP_NSP<<4):
+ hfid = hf_snmp_nsap_value;
+ break;
+ case BER_CLASS_APP|(SNMP_C64<<4):
+ hfid = hf_snmp_big_counter_value;
+ break;
+ default:
+ hfid = hf_snmp_unknown_value;
+ break;
+ }
+ if (value_len > 8) {
+ /*
+ * Too long for an FT_UINT64 or an FT_INT64.
+ */
+ header_field_info *hfinfo = proto_registrar_get_nth(hfid);
+ if (hfinfo->type == FT_UINT64) {
+ /*
+ * Check if this is an unsigned int64 with
+ * a big value.
+ */
+ if (value_len > 9 || tvb_get_guint8(tvb, value_offset) != 0) {
+ /* It is. Fail. */
+ proto_tree_add_expert_format(pt_varbind,actx->pinfo,&ei_snmp_uint_too_large,tvb,value_offset,value_len,"Integral value too large");
+ goto already_added;
+ }
+ /* Cheat and skip the leading 0 byte */
+ value_len--;
+ value_offset++;
+ } else if (hfinfo->type == FT_INT64) {
+ /*
+ * For now, just reject these.
+ */
+ proto_tree_add_expert_format(pt_varbind,actx->pinfo,&ei_snmp_int_too_large,tvb,value_offset,value_len,"Integral value too large or too small");
+ goto already_added;
+ }
+ } else if (value_len == 0) {
+ /*
+ * X.690 section 8.3.1 "Encoding of an integer value":
+ * "The encoding of an integer value shall be
+ * primitive. The contents octets shall consist of
+ * one or more octets."
+ *
+ * Zero is not "one or more".
+ */
+ header_field_info *hfinfo = proto_registrar_get_nth(hfid);
+ if (hfinfo->type == FT_UINT64 || hfinfo->type == FT_INT64) {
+ proto_tree_add_expert_format(pt_varbind,actx->pinfo,&ei_snmp_integral_value0,tvb,value_offset,value_len,"Integral value is zero-length");
+ goto already_added;
+ }
+ }
+ /* Special case DATE AND TIME */
+ if((oid_info->value_type)&&(oid_info->value_type->keytype == OID_KEY_TYPE_DATE_AND_TIME)&&(value_len > 7)){
+ pi_value = dissect_snmp_variable_date_and_time(pt_varbind, actx->pinfo, hfid, tvb, value_offset, value_len);
+ }else{
+ pi_value = proto_tree_add_item(pt_varbind,hfid,tvb,value_offset,value_len,ENC_BIG_ENDIAN);
+ }
+ if (format_error != BER_NO_ERROR) {
+ expert_add_info(actx->pinfo, pi_value, &ei_snmp_missing_mib);
+ }
+
+ }
+already_added:
+ pt_value = proto_item_add_subtree(pi_value,ett_value);
+
+ if (value_len > 0 && oid_string) {
+ tvbuff_t* sub_tvb = tvb_new_subset_length(tvb, value_offset, value_len);
+
+ next_tvb_add_string(var_list, sub_tvb, (snmp_var_in_tree) ? pt_value : NULL, value_sub_dissectors_table, oid_string);
+ }
+
+
+set_label:
+ if (pi_value) proto_item_fill_label(PITEM_FINFO(pi_value), label);
+
+ if (oid_info && oid_info->name) {
+ if (oid_left >= 1) {
+ repr = wmem_strdup_printf(actx->pinfo->pool, "%s.%s (%s)", oid_info->name,
+ oid_subid2string(actx->pinfo->pool, &(subids[oid_matched]),oid_left),
+ oid_subid2string(actx->pinfo->pool, subids,oid_matched+oid_left));
+ info_oid = wmem_strdup_printf(actx->pinfo->pool, "%s.%s", oid_info->name,
+ oid_subid2string(actx->pinfo->pool, &(subids[oid_matched]),oid_left));
+ } else {
+ repr = wmem_strdup_printf(actx->pinfo->pool, "%s (%s)", oid_info->name,
+ oid_subid2string(actx->pinfo->pool, subids,oid_matched));
+ info_oid = oid_info->name;
+ }
+ } else if (oid_string) {
+ repr = wmem_strdup(actx->pinfo->pool, oid_string);
+ info_oid = oid_string;
+ } else {
+ repr = wmem_strdup(actx->pinfo->pool, "[Bad OID]");
+ }
+
+ valstr = strstr(label,": ");
+ valstr = valstr ? valstr+2 : label;
+
+ proto_item_set_text(pi_varbind,"%s: %s",repr,valstr);
+
+ if (display_oid && info_oid) {
+ col_append_fstr (actx->pinfo->cinfo, COL_INFO, " %s", info_oid);
+ }
+
+ switch (format_error) {
+ case BER_WRONG_LENGTH: {
+ proto_item* pi;
+ proto_tree* p_tree = proto_item_add_subtree(pi_value,ett_decoding_error);
+ pt = proto_tree_add_subtree_format(p_tree,tvb,0,0,ett_decoding_error,&pi,
+ "Wrong value length: %u expecting: %u <= len <= %u",
+ value_len, min_len, max_len == -1 ? 0xFFFFFF : max_len);
+ expert_add_info(actx->pinfo, pi, &ei_snmp_varbind_wrong_length_value);
+ return dissect_unknown_ber(actx->pinfo, tvb, value_start, pt);
+ }
+ case BER_WRONG_TAG: {
+ proto_item* pi;
+ proto_tree* p_tree = proto_item_add_subtree(pi_value,ett_decoding_error);
+ pt = proto_tree_add_subtree_format(p_tree,tvb,0,0,ett_decoding_error,&pi,
+ "Wrong class/tag for Value expected: %d,%d got: %d,%d",
+ oid_info->value_type->ber_class, oid_info->value_type->ber_tag,
+ ber_class, tag);
+ expert_add_info(actx->pinfo, pi, &ei_snmp_varbind_wrong_class_tag);
+ return dissect_unknown_ber(actx->pinfo, tvb, value_start, pt);
+ }
+ default:
+ break;
+ }
+
+ return seq_offset + seq_len;
+}
+
+
+#define F_SNMP_ENGINEID_CONFORM 0x80
+#define SNMP_ENGINEID_RFC1910 0x00
+#define SNMP_ENGINEID_RFC3411 0x01
+
+static const true_false_string tfs_snmp_engineid_conform = {
+ "RFC3411 (SNMPv3)",
+ "RFC1910 (Non-SNMPv3)"
+};
+
+#define SNMP_ENGINEID_FORMAT_IPV4 0x01
+#define SNMP_ENGINEID_FORMAT_IPV6 0x02
+#define SNMP_ENGINEID_FORMAT_MACADDRESS 0x03
+#define SNMP_ENGINEID_FORMAT_TEXT 0x04
+#define SNMP_ENGINEID_FORMAT_OCTETS 0x05
+
+static const value_string snmp_engineid_format_vals[] = {
+ { SNMP_ENGINEID_FORMAT_IPV4, "IPv4 address" },
+ { SNMP_ENGINEID_FORMAT_IPV6, "IPv6 address" },
+ { SNMP_ENGINEID_FORMAT_MACADDRESS, "MAC address" },
+ { SNMP_ENGINEID_FORMAT_TEXT, "Text, administratively assigned" },
+ { SNMP_ENGINEID_FORMAT_OCTETS, "Octets, administratively assigned" },
+ { 0, NULL }
+};
+
+#define SNMP_ENGINEID_CISCO_AGENT 0x00
+#define SNMP_ENGINEID_CISCO_MANAGER 0x01
+
+static const value_string snmp_engineid_cisco_type_vals[] = {
+ { SNMP_ENGINEID_CISCO_AGENT, "Agent" },
+ { SNMP_ENGINEID_CISCO_MANAGER, "Manager" },
+ { 0, NULL }
+};
+
+/*
+ * SNMP Engine ID dissection according to RFC 3411 (SnmpEngineID TC)
+ * or historic RFC 1910 (AgentID)
+ */
+int
+dissect_snmp_engineid(proto_tree *tree, packet_info *pinfo, tvbuff_t *tvb, int offset, int len)
+{
+ proto_item *item = NULL;
+ guint8 conformance, format;
+ guint32 enterpriseid;
+ time_t seconds;
+ nstime_t ts;
+ int len_remain = len;
+
+ /* first bit: engine id conformance */
+ if (len_remain<1) return offset;
+ conformance = ((tvb_get_guint8(tvb, offset)>>7) & 0x01);
+ proto_tree_add_item(tree, hf_snmp_engineid_conform, tvb, offset, 1, ENC_BIG_ENDIAN);
+
+ /* 4-byte enterprise number/name */
+ if (len_remain<4) return offset;
+ enterpriseid = tvb_get_ntohl(tvb, offset);
+ if (conformance)
+ enterpriseid -= 0x80000000; /* ignore first bit */
+ proto_tree_add_uint(tree, hf_snmp_engineid_enterprise, tvb, offset, 4, enterpriseid);
+ offset+=4;
+ len_remain-=4;
+
+ switch(conformance) {
+
+ case SNMP_ENGINEID_RFC1910:
+ /* 12-byte AgentID w/ 8-byte trailer */
+ if (len_remain==8) {
+ proto_tree_add_item(tree, hf_snmp_agentid_trailer, tvb, offset, 8, ENC_NA);
+ offset+=8;
+ len_remain-=8;
+ } else {
+ proto_tree_add_expert(tree, pinfo, &ei_snmp_rfc1910_non_conformant, tvb, offset, len_remain);
+ return offset;
+ }
+ break;
+
+ case SNMP_ENGINEID_RFC3411: /* variable length: 5..32 */
+
+ /* 1-byte format specifier */
+ if (len_remain<1) return offset;
+ format = tvb_get_guint8(tvb, offset);
+ item = proto_tree_add_uint_format(tree, hf_snmp_engineid_format, tvb, offset, 1, format, "Engine ID Format: %s (%d)",
+ val_to_str_const(format, snmp_engineid_format_vals, "Reserved/Enterprise-specific"),
+ format);
+ offset+=1;
+ len_remain-=1;
+
+ switch(format) {
+ case SNMP_ENGINEID_FORMAT_IPV4:
+ /* 4-byte IPv4 address */
+ if (len_remain==4) {
+ proto_tree_add_item(tree, hf_snmp_engineid_ipv4, tvb, offset, 4, ENC_BIG_ENDIAN);
+ offset+=4;
+ len_remain=0;
+ }
+ break;
+ case SNMP_ENGINEID_FORMAT_IPV6:
+ /* 16-byte IPv6 address */
+ if (len_remain==16) {
+ proto_tree_add_item(tree, hf_snmp_engineid_ipv6, tvb, offset, 16, ENC_NA);
+ offset+=16;
+ len_remain=0;
+ }
+ break;
+ case SNMP_ENGINEID_FORMAT_MACADDRESS:
+ /* See: https://supportforums.cisco.com/message/3010617#3010617 for details. */
+ if ((enterpriseid==9)&&(len_remain==7)) {
+ proto_tree_add_item(tree, hf_snmp_engineid_cisco_type, tvb, offset, 1, ENC_BIG_ENDIAN);
+ offset++;
+ len_remain--;
+ }
+ /* 6-byte MAC address */
+ if (len_remain==6) {
+ proto_tree_add_item(tree, hf_snmp_engineid_mac, tvb, offset, 6, ENC_NA);
+ offset+=6;
+ len_remain=0;
+ }
+ break;
+ case SNMP_ENGINEID_FORMAT_TEXT:
+ /* max. 27-byte string, administratively assigned */
+ if (len_remain<=27) {
+ proto_tree_add_item(tree, hf_snmp_engineid_text, tvb, offset, len_remain, ENC_ASCII);
+ offset+=len_remain;
+ len_remain=0;
+ }
+ break;
+ case 128:
+ /* most common enterprise-specific format: (ucd|net)-snmp random */
+ if ((enterpriseid==2021)||(enterpriseid==8072)) {
+ proto_item_append_text(item, (enterpriseid==2021) ? ": UCD-SNMP Random" : ": Net-SNMP Random");
+ /* demystify: 4B random, 4B/8B epoch seconds */
+ if ((len_remain==8) || (len_remain==12)) {
+ proto_tree_add_item(tree, hf_snmp_engineid_data, tvb, offset, 4, ENC_NA);
+ if (len_remain==8) {
+ seconds = (time_t)tvb_get_letohl(tvb, offset + 4);
+ } else {
+ seconds = (time_t)tvb_get_letohi64(tvb, offset + 4);
+ }
+ ts.secs = seconds;
+ ts.nsecs = 0;
+ proto_tree_add_time_format_value(tree, hf_snmp_engineid_time, tvb, offset + 4, len_remain - 4,
+ &ts, "%s",
+ abs_time_secs_to_str(pinfo->pool, seconds, ABSOLUTE_TIME_LOCAL, TRUE));
+ offset+=len_remain;
+ len_remain=0;
+ }
+ break;
+ }
+ /* fall through */
+ case SNMP_ENGINEID_FORMAT_OCTETS:
+ default:
+ /* max. 27 bytes, administratively assigned or unknown format */
+ if (len_remain<=27) {
+ proto_tree_add_item(tree, hf_snmp_engineid_data, tvb, offset, len_remain, ENC_NA);
+ offset+=len_remain;
+ len_remain=0;
+ }
+ break;
+ }
+ }
+
+ if (len_remain>0) {
+ proto_tree_add_expert(tree, pinfo, &ei_snmp_rfc3411_non_conformant, tvb, offset, len_remain);
+ offset+=len_remain;
+ }
+ return offset;
+}
+
+
+static void set_ue_keys(snmp_ue_assoc_t* n ) {
+ guint key_size = auth_hash_len[n->user.authModel];
+
+ n->user.authKey.data = (guint8 *)g_malloc(key_size);
+ n->user.authKey.len = key_size;
+ snmp_usm_password_to_key(n->user.authModel,
+ n->user.authPassword.data,
+ n->user.authPassword.len,
+ n->engine.data,
+ n->engine.len,
+ n->user.authKey.data);
+
+ if (n->priv_proto == PRIV_AES128 || n->priv_proto == PRIV_AES192 || n->priv_proto == PRIV_AES256) {
+ guint need_key_len =
+ (n->priv_proto == PRIV_AES128) ? 16 :
+ (n->priv_proto == PRIV_AES192) ? 24 :
+ (n->priv_proto == PRIV_AES256) ? 32 :
+ 0;
+
+ guint key_len = key_size;
+
+ while (key_len < need_key_len)
+ key_len += key_size;
+
+ n->user.privKey.data = (guint8 *)g_malloc(key_len);
+ n->user.privKey.len = need_key_len;
+
+ snmp_usm_password_to_key(n->user.authModel,
+ n->user.privPassword.data,
+ n->user.privPassword.len,
+ n->engine.data,
+ n->engine.len,
+ n->user.privKey.data);
+
+ key_len = key_size;
+
+ /* extend key if needed */
+ while (key_len < need_key_len) {
+ snmp_usm_password_to_key(n->user.authModel,
+ n->user.privKey.data,
+ key_len,
+ n->engine.data,
+ n->engine.len,
+ n->user.privKey.data + key_len);
+
+ key_len += key_size;
+ }
+
+ } else {
+ n->user.privKey.data = (guint8 *)g_malloc(key_size);
+ n->user.privKey.len = key_size;
+ snmp_usm_password_to_key(n->user.authModel,
+ n->user.privPassword.data,
+ n->user.privPassword.len,
+ n->engine.data,
+ n->engine.len,
+ n->user.privKey.data);
+ }
+}
+
+static snmp_ue_assoc_t*
+ue_dup(snmp_ue_assoc_t* o)
+{
+ snmp_ue_assoc_t* d = (snmp_ue_assoc_t*)g_memdup2(o,sizeof(snmp_ue_assoc_t));
+
+ d->user.authModel = o->user.authModel;
+
+ d->user.privProtocol = o->user.privProtocol;
+
+ d->user.userName.data = (guint8 *)g_memdup2(o->user.userName.data,o->user.userName.len);
+ d->user.userName.len = o->user.userName.len;
+
+ d->user.authPassword.data = o->user.authPassword.data ? (guint8 *)g_memdup2(o->user.authPassword.data,o->user.authPassword.len) : NULL;
+ d->user.authPassword.len = o->user.authPassword.len;
+
+ d->user.privPassword.data = o->user.privPassword.data ? (guint8 *)g_memdup2(o->user.privPassword.data,o->user.privPassword.len) : NULL;
+ d->user.privPassword.len = o->user.privPassword.len;
+
+ d->engine.len = o->engine.len;
+
+ if (d->engine.len) {
+ d->engine.data = (guint8 *)g_memdup2(o->engine.data,o->engine.len);
+ set_ue_keys(d);
+ }
+
+ return d;
+
+}
+
+static void*
+snmp_users_copy_cb(void* dest, const void* orig, size_t len _U_)
+{
+ const snmp_ue_assoc_t* o = (const snmp_ue_assoc_t*)orig;
+ snmp_ue_assoc_t* d = (snmp_ue_assoc_t*)dest;
+
+ d->auth_model = o->auth_model;
+ d->user.authModel = (snmp_usm_auth_model_t) o->auth_model;
+
+ d->priv_proto = o->priv_proto;
+ d->user.privProtocol = priv_protos[o->priv_proto];
+
+ d->user.userName.data = (guint8*)g_memdup2(o->user.userName.data,o->user.userName.len);
+ d->user.userName.len = o->user.userName.len;
+
+ d->user.authPassword.data = o->user.authPassword.data ? (guint8*)g_memdup2(o->user.authPassword.data,o->user.authPassword.len) : NULL;
+ d->user.authPassword.len = o->user.authPassword.len;
+
+ d->user.privPassword.data = o->user.privPassword.data ? (guint8*)g_memdup2(o->user.privPassword.data,o->user.privPassword.len) : NULL;
+ d->user.privPassword.len = o->user.privPassword.len;
+
+ d->engine.len = o->engine.len;
+ if (o->engine.data) {
+ d->engine.data = (guint8*)g_memdup2(o->engine.data,o->engine.len);
+ }
+
+ d->user.authKey.data = o->user.authKey.data ? (guint8*)g_memdup2(o->user.authKey.data,o->user.authKey.len) : NULL;
+ d->user.authKey.len = o->user.authKey.len;
+
+ d->user.privKey.data = o->user.privKey.data ? (guint8*)g_memdup2(o->user.privKey.data,o->user.privKey.len) : NULL;
+ d->user.privKey.len = o->user.privKey.len;
+
+ return d;
+}
+
+static void
+snmp_users_free_cb(void* p)
+{
+ snmp_ue_assoc_t* ue = (snmp_ue_assoc_t*)p;
+ g_free(ue->user.userName.data);
+ g_free(ue->user.authPassword.data);
+ g_free(ue->user.privPassword.data);
+ g_free(ue->user.authKey.data);
+ g_free(ue->user.privKey.data);
+ g_free(ue->engine.data);
+}
+
+static bool
+snmp_users_update_cb(void* p _U_, char** err)
+{
+ snmp_ue_assoc_t* ue = (snmp_ue_assoc_t*)p;
+ GString* es = g_string_new("");
+ unsigned int i;
+
+ *err = NULL;
+
+ if (! ue->user.userName.len) {
+ g_string_append_printf(es,"no userName\n");
+ } else if ((ue->engine.len > 0) && (ue->engine.len < 5 || ue->engine.len > 32)) {
+ /* RFC 3411 section 5 */
+ g_string_append_printf(es, "Invalid engineId length (%u). Must be between 5 and 32 (10 and 64 hex digits)\n", ue->engine.len);
+ } else if (num_ueas) {
+ for (i=0; i<num_ueas-1; i++) {
+ snmp_ue_assoc_t* u = &(ueas[i]);
+
+ if ( u->user.userName.len == ue->user.userName.len
+ && u->engine.len == ue->engine.len && (u != ue)) {
+
+ if (u->engine.len > 0 && memcmp( u->engine.data, ue->engine.data, u->engine.len ) == 0) {
+ if ( memcmp( u->user.userName.data, ue->user.userName.data, ue->user.userName.len ) == 0 ) {
+ /* XXX: make a string for the engineId */
+ g_string_append_printf(es,"Duplicate key (userName='%s')\n",ue->user.userName.data);
+ break;
+ }
+ }
+
+ if (u->engine.len == 0) {
+ if ( memcmp( u->user.userName.data, ue->user.userName.data, ue->user.userName.len ) == 0 ) {
+ g_string_append_printf(es,"Duplicate key (userName='%s' engineId=NONE)\n",ue->user.userName.data);
+ break;
+ }
+ }
+ }
+ }
+ }
+
+ if (es->len) {
+ es = g_string_truncate(es,es->len-1);
+ *err = g_string_free(es, FALSE);
+ return FALSE;
+ }
+
+ return TRUE;
+}
+
+static void
+free_ue_cache(snmp_ue_assoc_t **cache)
+{
+ static snmp_ue_assoc_t *a, *nxt;
+
+ for (a = *cache; a; a = nxt) {
+ nxt = a->next;
+ snmp_users_free_cb(a);
+ g_free(a);
+ }
+
+ *cache = NULL;
+}
+
+#define CACHE_INSERT(c,a) if (c) { snmp_ue_assoc_t* t = c; c = a; c->next = t; } else { c = a; a->next = NULL; }
+
+static void
+init_ue_cache(void)
+{
+ guint i;
+
+ for (i = 0; i < num_ueas; i++) {
+ snmp_ue_assoc_t* a = ue_dup(&(ueas[i]));
+
+ if (a->engine.len) {
+ CACHE_INSERT(localized_ues,a);
+
+ } else {
+ CACHE_INSERT(unlocalized_ues,a);
+ }
+
+ }
+}
+
+static void
+cleanup_ue_cache(void)
+{
+ free_ue_cache(&localized_ues);
+ free_ue_cache(&unlocalized_ues);
+}
+
+/* Called when the user applies changes to UAT preferences. */
+static void
+renew_ue_cache(void)
+{
+ cleanup_ue_cache();
+ init_ue_cache();
+}
+
+
+static snmp_ue_assoc_t*
+localize_ue( snmp_ue_assoc_t* o, const guint8* engine, guint engine_len )
+{
+ snmp_ue_assoc_t* n = (snmp_ue_assoc_t*)g_memdup2(o,sizeof(snmp_ue_assoc_t));
+
+ n->user.userName.data = (guint8*)g_memdup2(o->user.userName.data,o->user.userName.len);
+ n->user.authModel = o->user.authModel;
+ n->user.authPassword.data = (guint8*)g_memdup2(o->user.authPassword.data,o->user.authPassword.len);
+ n->user.authPassword.len = o->user.authPassword.len;
+ n->user.privPassword.data = (guint8*)g_memdup2(o->user.privPassword.data,o->user.privPassword.len);
+ n->user.privPassword.len = o->user.privPassword.len;
+ n->user.authKey.data = (guint8*)g_memdup2(o->user.authKey.data,o->user.authKey.len);
+ n->user.privKey.data = (guint8*)g_memdup2(o->user.privKey.data,o->user.privKey.len);
+ n->engine.data = (guint8*)g_memdup2(engine,engine_len);
+ n->engine.len = engine_len;
+ n->priv_proto = o->priv_proto;
+
+ set_ue_keys(n);
+
+ return n;
+}
+
+
+#define localized_match(a,u,ul,e,el) \
+ ( a->user.userName.len == ul \
+ && a->engine.len == el \
+ && memcmp( a->user.userName.data, u, ul ) == 0 \
+ && memcmp( a->engine.data, e, el ) == 0 )
+
+#define unlocalized_match(a,u,l) \
+ ( a->user.userName.len == l && memcmp( a->user.userName.data, u, l) == 0 )
+
+static snmp_ue_assoc_t*
+get_user_assoc(tvbuff_t* engine_tvb, tvbuff_t* user_tvb, packet_info *pinfo)
+{
+ static snmp_ue_assoc_t* a;
+ guint given_username_len;
+ guint8* given_username;
+ guint given_engine_len = 0;
+ guint8* given_engine = NULL;
+
+ if ( ! (localized_ues || unlocalized_ues ) ) return NULL;
+
+ if (! ( user_tvb && engine_tvb ) ) return NULL;
+
+ given_username_len = tvb_captured_length(user_tvb);
+ given_engine_len = tvb_captured_length(engine_tvb);
+ if (! ( given_engine_len && given_username_len ) ) return NULL;
+ given_username = (guint8*)tvb_memdup(pinfo->pool,user_tvb,0,-1);
+ given_engine = (guint8*)tvb_memdup(pinfo->pool,engine_tvb,0,-1);
+
+ for (a = localized_ues; a; a = a->next) {
+ if ( localized_match(a, given_username, given_username_len, given_engine, given_engine_len) ) {
+ return a;
+ }
+ }
+
+ for (a = unlocalized_ues; a; a = a->next) {
+ if ( unlocalized_match(a, given_username, given_username_len) ) {
+ snmp_ue_assoc_t* n = localize_ue( a, given_engine, given_engine_len );
+ CACHE_INSERT(localized_ues,n);
+ return n;
+ }
+ }
+
+ return NULL;
+}
+
+static bool
+snmp_usm_auth(const packet_info *pinfo, const snmp_usm_auth_model_t model, snmp_usm_params_t* p, guint8** calc_auth_p,
+ guint* calc_auth_len_p, gchar const** error)
+{
+ gint msg_len;
+ guint8* msg;
+ guint auth_len;
+ guint8* auth;
+ guint8* key;
+ guint key_len;
+ guint8 *calc_auth;
+ guint start;
+ guint end;
+ guint i;
+
+ if (!p->auth_tvb) {
+ *error = "No Authenticator";
+ return FALSE;
+ }
+
+ key = p->user_assoc->user.authKey.data;
+ key_len = p->user_assoc->user.authKey.len;
+
+ if (! key ) {
+ *error = "User has no authKey";
+ return FALSE;
+ }
+
+ auth_len = tvb_captured_length(p->auth_tvb);
+
+ if (auth_len != auth_tag_len[model]) {
+ *error = "Authenticator length wrong";
+ return FALSE;
+ }
+
+ msg_len = tvb_captured_length(p->msg_tvb);
+ if (msg_len <= 0) {
+ *error = "Not enough data remaining";
+ return FALSE;
+ }
+ msg = (guint8*)tvb_memdup(pinfo->pool,p->msg_tvb,0,msg_len);
+
+ auth = (guint8*)tvb_memdup(pinfo->pool,p->auth_tvb,0,auth_len);
+
+ start = p->auth_offset - p->start_offset;
+ end = start + auth_len;
+
+ /* fill the authenticator with zeros */
+ for ( i = start ; i < end ; i++ ) {
+ msg[i] = '\0';
+ }
+
+ calc_auth = (guint8*)wmem_alloc(pinfo->pool, auth_hash_len[model]);
+
+ if (ws_hmac_buffer(auth_hash_algo[model], calc_auth, msg, msg_len, key, key_len)) {
+ return FALSE;
+ }
+
+ if (calc_auth_p) *calc_auth_p = calc_auth;
+ if (calc_auth_len_p) *calc_auth_len_p = auth_len;
+
+ return ( memcmp(auth,calc_auth,auth_len) != 0 ) ? FALSE : TRUE;
+}
+
+static tvbuff_t*
+snmp_usm_priv_des(snmp_usm_params_t* p, tvbuff_t* encryptedData, packet_info *pinfo, gchar const** error)
+{
+ gcry_error_t err;
+ gcry_cipher_hd_t hd = NULL;
+
+ guint8* cleartext;
+ guint8* des_key = p->user_assoc->user.privKey.data; /* first 8 bytes */
+ guint8* pre_iv = &(p->user_assoc->user.privKey.data[8]); /* last 8 bytes */
+ guint8* salt;
+ gint salt_len;
+ gint cryptgrm_len;
+ guint8* cryptgrm;
+ tvbuff_t* clear_tvb;
+ guint8 iv[8];
+ guint i;
+
+
+ salt_len = tvb_captured_length(p->priv_tvb);
+
+ if (salt_len != 8) {
+ *error = "decryptionError: msgPrivacyParameters length != 8";
+ return NULL;
+ }
+
+ salt = (guint8*)tvb_memdup(pinfo->pool,p->priv_tvb,0,salt_len);
+
+ /*
+ The resulting "salt" is XOR-ed with the pre-IV to obtain the IV.
+ */
+ for (i=0; i<8; i++) {
+ iv[i] = pre_iv[i] ^ salt[i];
+ }
+
+ cryptgrm_len = tvb_captured_length(encryptedData);
+
+ if ((cryptgrm_len <= 0) || (cryptgrm_len % 8)) {
+ *error = "decryptionError: the length of the encrypted data is not a multiple of 8 octets";
+ return NULL;
+ }
+
+ cryptgrm = (guint8*)tvb_memdup(pinfo->pool,encryptedData,0,-1);
+
+ cleartext = (guint8*)wmem_alloc(pinfo->pool, cryptgrm_len);
+
+ err = gcry_cipher_open(&hd, GCRY_CIPHER_DES, GCRY_CIPHER_MODE_CBC, 0);
+ if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
+
+ err = gcry_cipher_setiv(hd, iv, 8);
+ if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
+
+ err = gcry_cipher_setkey(hd,des_key,8);
+ if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
+
+ err = gcry_cipher_decrypt(hd, cleartext, cryptgrm_len, cryptgrm, cryptgrm_len);
+ if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
+
+ gcry_cipher_close(hd);
+
+ clear_tvb = tvb_new_child_real_data(encryptedData, cleartext, cryptgrm_len, cryptgrm_len);
+
+ return clear_tvb;
+
+on_gcry_error:
+ *error = (const gchar *)gcry_strerror(err);
+ if (hd) gcry_cipher_close(hd);
+ return NULL;
+}
+
+static tvbuff_t*
+snmp_usm_priv_aes_common(snmp_usm_params_t* p, tvbuff_t* encryptedData, packet_info *pinfo, gchar const** error, int algo)
+{
+ gcry_error_t err;
+ gcry_cipher_hd_t hd = NULL;
+
+ guint8* cleartext;
+ guint8* aes_key = p->user_assoc->user.privKey.data;
+ int aes_key_len = p->user_assoc->user.privKey.len;
+ guint8 iv[16];
+ gint priv_len;
+ gint cryptgrm_len;
+ guint8* cryptgrm;
+ tvbuff_t* clear_tvb;
+
+ priv_len = tvb_captured_length(p->priv_tvb);
+
+ if (priv_len != 8) {
+ *error = "decryptionError: msgPrivacyParameters length != 8";
+ return NULL;
+ }
+
+ iv[0] = (p->boots & 0xff000000) >> 24;
+ iv[1] = (p->boots & 0x00ff0000) >> 16;
+ iv[2] = (p->boots & 0x0000ff00) >> 8;
+ iv[3] = (p->boots & 0x000000ff);
+ iv[4] = (p->snmp_time & 0xff000000) >> 24;
+ iv[5] = (p->snmp_time & 0x00ff0000) >> 16;
+ iv[6] = (p->snmp_time & 0x0000ff00) >> 8;
+ iv[7] = (p->snmp_time & 0x000000ff);
+ tvb_memcpy(p->priv_tvb,&(iv[8]),0,8);
+
+ cryptgrm_len = tvb_captured_length(encryptedData);
+ if (cryptgrm_len <= 0) {
+ *error = "Not enough data remaining";
+ return NULL;
+ }
+ cryptgrm = (guint8*)tvb_memdup(pinfo->pool,encryptedData,0,-1);
+
+ cleartext = (guint8*)wmem_alloc(pinfo->pool, cryptgrm_len);
+
+ err = gcry_cipher_open(&hd, algo, GCRY_CIPHER_MODE_CFB, 0);
+ if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
+
+ err = gcry_cipher_setiv(hd, iv, 16);
+ if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
+
+ err = gcry_cipher_setkey(hd,aes_key,aes_key_len);
+ if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
+
+ err = gcry_cipher_decrypt(hd, cleartext, cryptgrm_len, cryptgrm, cryptgrm_len);
+ if (err != GPG_ERR_NO_ERROR) goto on_gcry_error;
+
+ gcry_cipher_close(hd);
+
+ clear_tvb = tvb_new_child_real_data(encryptedData, cleartext, cryptgrm_len, cryptgrm_len);
+
+ return clear_tvb;
+
+on_gcry_error:
+ *error = (const gchar *)gcry_strerror(err);
+ if (hd) gcry_cipher_close(hd);
+ return NULL;
+}
+
+static tvbuff_t*
+snmp_usm_priv_aes128(snmp_usm_params_t* p, tvbuff_t* encryptedData, packet_info *pinfo, gchar const** error)
+{
+ return snmp_usm_priv_aes_common(p, encryptedData, pinfo, error, GCRY_CIPHER_AES);
+}
+
+static tvbuff_t*
+snmp_usm_priv_aes192(snmp_usm_params_t* p, tvbuff_t* encryptedData, packet_info *pinfo, gchar const** error)
+{
+ return snmp_usm_priv_aes_common(p, encryptedData, pinfo, error, GCRY_CIPHER_AES192);
+}
+
+static tvbuff_t*
+snmp_usm_priv_aes256(snmp_usm_params_t* p, tvbuff_t* encryptedData, packet_info *pinfo, gchar const** error)
+{
+ return snmp_usm_priv_aes_common(p, encryptedData, pinfo, error, GCRY_CIPHER_AES256);
+}
+
+static gboolean
+check_ScopedPdu(tvbuff_t* tvb)
+{
+ int offset;
+ gint8 ber_class;
+ bool pc;
+ gint32 tag;
+ int hoffset, eoffset;
+ guint32 len;
+
+ offset = get_ber_identifier(tvb, 0, &ber_class, &pc, &tag);
+ offset = get_ber_length(tvb, offset, NULL, NULL);
+
+ if ( ! (((ber_class!=BER_CLASS_APP) && (ber_class!=BER_CLASS_PRI) )
+ && ( (!pc) || (ber_class!=BER_CLASS_UNI) || (tag!=BER_UNI_TAG_ENUMERATED) )
+ )) return FALSE;
+
+ if((tvb_get_guint8(tvb, offset)==0)&&(tvb_get_guint8(tvb, offset+1)==0))
+ return TRUE;
+
+ hoffset = offset;
+
+ offset = get_ber_identifier(tvb, offset, &ber_class, &pc, &tag);
+ offset = get_ber_length(tvb, offset, &len, NULL);
+ eoffset = offset + len;
+
+ if (eoffset <= hoffset) return FALSE;
+
+ if ((ber_class!=BER_CLASS_APP)&&(ber_class!=BER_CLASS_PRI))
+ if( (ber_class!=BER_CLASS_UNI)
+ ||((tag<BER_UNI_TAG_NumericString)&&(tag!=BER_UNI_TAG_OCTETSTRING)&&(tag!=BER_UNI_TAG_UTF8String)) )
+ return FALSE;
+
+ return TRUE;
+
+}
+
+
+
+
+static int
+dissect_snmp_EnterpriseOID(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ const gchar* name;
+
+ offset = dissect_ber_object_identifier_str(implicit_tag, actx, tree, tvb, offset, hf_index, &enterprise_oid);
+
+
+ if (display_oid && enterprise_oid) {
+ name = oid_resolved_from_string(actx->pinfo->pool, enterprise_oid);
+ if (name) {
+ col_append_fstr (actx->pinfo->cinfo, COL_INFO, " %s", name);
+ }
+ }
+
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_OCTET_STRING_SIZE_4(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_NetworkAddress(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_APP, 0, TRUE, dissect_snmp_OCTET_STRING_SIZE_4);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_INTEGER_0_4294967295(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_TimeTicks(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_APP, 3, TRUE, dissect_snmp_INTEGER_0_4294967295);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_Integer32(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ &RequestID);
+
+
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_ObjectName(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_object_identifier(implicit_tag, actx, tree, tvb, offset, hf_index, NULL);
+
+ return offset;
+}
+
+
+static const value_string snmp_Version_vals[] = {
+ { 0, "version-1" },
+ { 1, "v2c" },
+ { 2, "v2u" },
+ { 3, "snmpv3" },
+ { 0, NULL }
+};
+
+
+static int
+dissect_snmp_Version(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ &snmp_version);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_Community(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_T_request_id(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ &RequestID);
+
+
+
+ return offset;
+}
+
+
+static const value_string snmp_T_error_status_vals[] = {
+ { 0, "noError" },
+ { 1, "tooBig" },
+ { 2, "noSuchName" },
+ { 3, "badValue" },
+ { 4, "readOnly" },
+ { 5, "genErr" },
+ { 6, "noAccess" },
+ { 7, "wrongType" },
+ { 8, "wrongLength" },
+ { 9, "wrongEncoding" },
+ { 10, "wrongValue" },
+ { 11, "noCreation" },
+ { 12, "inconsistentValue" },
+ { 13, "resourceUnavailable" },
+ { 14, "commitFailed" },
+ { 15, "undoFailed" },
+ { 16, "authorizationError" },
+ { 17, "notWritable" },
+ { 18, "inconsistentName" },
+ { 0, NULL }
+};
+
+
+static int
+dissect_snmp_T_error_status(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_INTEGER(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+
+static const ber_sequence_t VarBindList_sequence_of[1] = {
+ { &hf_snmp_VarBindList_item, BER_CLASS_UNI, BER_UNI_TAG_SEQUENCE, BER_FLAGS_NOOWNTAG, dissect_snmp_VarBind },
+};
+
+static int
+dissect_snmp_VarBindList(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_sequence_of(implicit_tag, actx, tree, tvb, offset,
+ VarBindList_sequence_of, hf_index, ett_snmp_VarBindList);
+
+ return offset;
+}
+
+
+static const ber_sequence_t PDU_sequence[] = {
+ { &hf_snmp_request_id , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_T_request_id },
+ { &hf_snmp_error_status , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_T_error_status },
+ { &hf_snmp_error_index , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_INTEGER },
+ { &hf_snmp_variable_bindings, BER_CLASS_UNI, BER_UNI_TAG_SEQUENCE, BER_FLAGS_NOOWNTAG, dissect_snmp_VarBindList },
+ { NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_PDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
+ PDU_sequence, hf_index, ett_snmp_PDU);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_GetRequest_PDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_CON, 0, TRUE, dissect_snmp_PDU);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_GetNextRequest_PDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_CON, 1, TRUE, dissect_snmp_PDU);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_GetResponse_PDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_CON, 2, TRUE, dissect_snmp_PDU);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_SetRequest_PDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_CON, 3, TRUE, dissect_snmp_PDU);
+
+ return offset;
+}
+
+
+static const value_string snmp_GenericTrap_vals[] = {
+ { 0, "coldStart" },
+ { 1, "warmStart" },
+ { 2, "linkDown" },
+ { 3, "linkUp" },
+ { 4, "authenticationFailure" },
+ { 5, "egpNeighborLoss" },
+ { 6, "enterpriseSpecific" },
+ { 0, NULL }
+};
+
+
+static int
+dissect_snmp_GenericTrap(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ &generic_trap);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_SpecificTrap(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ guint specific_trap;
+
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ &specific_trap);
+
+
+ if (generic_trap == 6) { /* enterprise specific */
+ const gchar *specific_str = snmp_lookup_specific_trap (specific_trap);
+ if (specific_str) {
+ proto_item_append_text(actx->created_item, " (%s)", specific_str);
+ }
+ }
+
+ return offset;
+}
+
+
+static const ber_sequence_t Trap_PDU_U_sequence[] = {
+ { &hf_snmp_enterprise , BER_CLASS_UNI, BER_UNI_TAG_OID, BER_FLAGS_NOOWNTAG, dissect_snmp_EnterpriseOID },
+ { &hf_snmp_agent_addr , BER_CLASS_APP, 0, BER_FLAGS_NOOWNTAG, dissect_snmp_NetworkAddress },
+ { &hf_snmp_generic_trap , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_GenericTrap },
+ { &hf_snmp_specific_trap , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_SpecificTrap },
+ { &hf_snmp_time_stamp , BER_CLASS_APP, 3, BER_FLAGS_NOOWNTAG, dissect_snmp_TimeTicks },
+ { &hf_snmp_variable_bindings, BER_CLASS_UNI, BER_UNI_TAG_SEQUENCE, BER_FLAGS_NOOWNTAG, dissect_snmp_VarBindList },
+ { NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_Trap_PDU_U(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ generic_trap = 0;
+ enterprise_oid = NULL;
+
+ offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
+ Trap_PDU_U_sequence, hf_index, ett_snmp_Trap_PDU_U);
+
+
+ if (snmp_version != 0) {
+ expert_add_info(actx->pinfo, tree, &ei_snmp_trap_pdu_obsolete);
+ }
+
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_Trap_PDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_CON, 4, TRUE, dissect_snmp_Trap_PDU_U);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_INTEGER_0_2147483647(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+static const ber_sequence_t BulkPDU_sequence[] = {
+ { &hf_snmp_bulkPDU_request_id, BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_Integer32 },
+ { &hf_snmp_non_repeaters , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_INTEGER_0_2147483647 },
+ { &hf_snmp_max_repetitions, BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_INTEGER_0_2147483647 },
+ { &hf_snmp_variable_bindings, BER_CLASS_UNI, BER_UNI_TAG_SEQUENCE, BER_FLAGS_NOOWNTAG, dissect_snmp_VarBindList },
+ { NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_BulkPDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
+ BulkPDU_sequence, hf_index, ett_snmp_BulkPDU);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_GetBulkRequest_PDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_CON, 5, TRUE, dissect_snmp_BulkPDU);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_InformRequest_PDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_CON, 6, TRUE, dissect_snmp_PDU);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_SNMPv2_Trap_PDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_CON, 7, TRUE, dissect_snmp_PDU);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_Report_PDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_CON, 8, TRUE, dissect_snmp_PDU);
+
+ return offset;
+}
+
+
+static const value_string snmp_PDUs_vals[] = {
+ { 0, "get-request" },
+ { 1, "get-next-request" },
+ { 2, "get-response" },
+ { 3, "set-request" },
+ { 4, "trap" },
+ { 5, "getBulkRequest" },
+ { 6, "informRequest" },
+ { 7, "snmpV2-trap" },
+ { 8, "report" },
+ { 0, NULL }
+};
+
+static const ber_choice_t PDUs_choice[] = {
+ { 0, &hf_snmp_get_request , BER_CLASS_CON, 0, BER_FLAGS_NOOWNTAG, dissect_snmp_GetRequest_PDU },
+ { 1, &hf_snmp_get_next_request, BER_CLASS_CON, 1, BER_FLAGS_NOOWNTAG, dissect_snmp_GetNextRequest_PDU },
+ { 2, &hf_snmp_get_response , BER_CLASS_CON, 2, BER_FLAGS_NOOWNTAG, dissect_snmp_GetResponse_PDU },
+ { 3, &hf_snmp_set_request , BER_CLASS_CON, 3, BER_FLAGS_NOOWNTAG, dissect_snmp_SetRequest_PDU },
+ { 4, &hf_snmp_trap , BER_CLASS_CON, 4, BER_FLAGS_NOOWNTAG, dissect_snmp_Trap_PDU },
+ { 5, &hf_snmp_getBulkRequest , BER_CLASS_CON, 5, BER_FLAGS_NOOWNTAG, dissect_snmp_GetBulkRequest_PDU },
+ { 6, &hf_snmp_informRequest , BER_CLASS_CON, 6, BER_FLAGS_NOOWNTAG, dissect_snmp_InformRequest_PDU },
+ { 7, &hf_snmp_snmpV2_trap , BER_CLASS_CON, 7, BER_FLAGS_NOOWNTAG, dissect_snmp_SNMPv2_Trap_PDU },
+ { 8, &hf_snmp_report , BER_CLASS_CON, 8, BER_FLAGS_NOOWNTAG, dissect_snmp_Report_PDU },
+ { 0, NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_PDUs(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ gint pdu_type=-1;
+
+ snmp_request_response_t *srrp;
+ snmp_conv_info_t *snmp_info = (snmp_conv_info_t *)actx->private_data;
+
+ col_clear(actx->pinfo->cinfo, COL_INFO);
+
+ offset = dissect_ber_choice(actx, tree, tvb, offset,
+ PDUs_choice, hf_index, ett_snmp_PDUs,
+ &pdu_type);
+
+ if( (pdu_type!=-1) && snmp_PDUs_vals[pdu_type].strptr ){
+ col_prepend_fstr(actx->pinfo->cinfo, COL_INFO, "%s", snmp_PDUs_vals[pdu_type].strptr);
+
+ /* pdu_type is the index, not the tag so convert it to the tag value */
+ pdu_type = snmp_PDUs_vals[pdu_type].value;
+
+ srrp=snmp_match_request_response(tvb, actx->pinfo, tree, RequestID, pdu_type, snmp_info);
+ if (srrp) {
+ tap_queue_packet(snmp_tap, actx->pinfo, srrp);
+ }
+ }
+
+
+
+ return offset;
+}
+
+
+static const ber_sequence_t Message_sequence[] = {
+ { &hf_snmp_version , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_Version },
+ { &hf_snmp_community , BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_Community },
+ { &hf_snmp_data , BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG|BER_FLAGS_NOTCHKTAG, dissect_snmp_PDUs },
+ { NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_Message(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
+ Message_sequence, hf_index, ett_snmp_Message);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_OCTET_STRING(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+static const value_string snmp_T_datav2u_vals[] = {
+ { 0, "plaintext" },
+ { 1, "encrypted" },
+ { 0, NULL }
+};
+
+static const ber_choice_t T_datav2u_choice[] = {
+ { 0, &hf_snmp_v2u_plaintext , BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG, dissect_snmp_PDUs },
+ { 1, &hf_snmp_encrypted , BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_OCTET_STRING },
+ { 0, NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_T_datav2u(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_choice(actx, tree, tvb, offset,
+ T_datav2u_choice, hf_index, ett_snmp_T_datav2u,
+ NULL);
+
+ return offset;
+}
+
+
+static const ber_sequence_t Messagev2u_sequence[] = {
+ { &hf_snmp_version , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_Version },
+ { &hf_snmp_parameters , BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_OCTET_STRING },
+ { &hf_snmp_datav2u , BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG|BER_FLAGS_NOTCHKTAG, dissect_snmp_T_datav2u },
+ { NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_Messagev2u(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
+ Messagev2u_sequence, hf_index, ett_snmp_Messagev2u);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_SnmpEngineID(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ tvbuff_t* param_tvb = NULL;
+
+ offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index, &param_tvb);
+ if (param_tvb) {
+ proto_tree* engine_tree = proto_item_add_subtree(actx->created_item,ett_engineid);
+ dissect_snmp_engineid(engine_tree, actx->pinfo, param_tvb, 0, tvb_reported_length_remaining(param_tvb,0));
+ }
+
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_T_msgAuthoritativeEngineID(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+
+ offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index, &usm_p.engine_tvb);
+ if (usm_p.engine_tvb) {
+ proto_tree* engine_tree = proto_item_add_subtree(actx->created_item,ett_engineid);
+ dissect_snmp_engineid(engine_tree, actx->pinfo, usm_p.engine_tvb, 0, tvb_reported_length_remaining(usm_p.engine_tvb,0));
+ }
+
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_T_msgAuthoritativeEngineBoots(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ &usm_p.boots);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_T_msgAuthoritativeEngineTime(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ &usm_p.snmp_time);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_T_msgUserName(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
+ &usm_p.user_tvb);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_T_msgAuthenticationParameters(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_octet_string(FALSE, actx, tree, tvb, offset, hf_index, &usm_p.auth_tvb);
+ if (usm_p.auth_tvb) {
+ usm_p.auth_item = actx->created_item;
+ usm_p.auth_offset = tvb_offset_from_real_beginning(usm_p.auth_tvb);
+ }
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_T_msgPrivacyParameters(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
+ &usm_p.priv_tvb);
+
+ return offset;
+}
+
+
+static const ber_sequence_t UsmSecurityParameters_sequence[] = {
+ { &hf_snmp_msgAuthoritativeEngineID, BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_T_msgAuthoritativeEngineID },
+ { &hf_snmp_msgAuthoritativeEngineBoots, BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_T_msgAuthoritativeEngineBoots },
+ { &hf_snmp_msgAuthoritativeEngineTime, BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_T_msgAuthoritativeEngineTime },
+ { &hf_snmp_msgUserName , BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_T_msgUserName },
+ { &hf_snmp_msgAuthenticationParameters, BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_T_msgAuthenticationParameters },
+ { &hf_snmp_msgPrivacyParameters, BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_T_msgPrivacyParameters },
+ { NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_UsmSecurityParameters(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
+ UsmSecurityParameters_sequence, hf_index, ett_snmp_UsmSecurityParameters);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_INTEGER_484_2147483647(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_T_msgFlags(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ tvbuff_t *parameter_tvb = NULL;
+
+ offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
+ &parameter_tvb);
+
+ if (parameter_tvb){
+ guint8 v3_flags = tvb_get_guint8(parameter_tvb, 0);
+ proto_tree* flags_tree = proto_item_add_subtree(actx->created_item,ett_msgFlags);
+
+ proto_tree_add_item(flags_tree, hf_snmp_v3_flags_report, parameter_tvb, 0, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item(flags_tree, hf_snmp_v3_flags_crypt, parameter_tvb, 0, 1, ENC_BIG_ENDIAN);
+ proto_tree_add_item(flags_tree, hf_snmp_v3_flags_auth, parameter_tvb, 0, 1, ENC_BIG_ENDIAN);
+
+ usm_p.encrypted = v3_flags & TH_CRYPT ? TRUE : FALSE;
+ usm_p.authenticated = v3_flags & TH_AUTH ? TRUE : FALSE;
+ }
+
+
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_T_msgSecurityModel(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ &MsgSecurityModel);
+
+ return offset;
+}
+
+
+static const ber_sequence_t HeaderData_sequence[] = {
+ { &hf_snmp_msgID , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_INTEGER_0_2147483647 },
+ { &hf_snmp_msgMaxSize , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_INTEGER_484_2147483647 },
+ { &hf_snmp_msgFlags , BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_T_msgFlags },
+ { &hf_snmp_msgSecurityModel, BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_T_msgSecurityModel },
+ { NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_HeaderData(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
+ HeaderData_sequence, hf_index, ett_snmp_HeaderData);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_T_msgSecurityParameters(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+
+ switch(MsgSecurityModel){
+ case SNMP_SEC_USM: /* 3 */
+ offset = get_ber_identifier(tvb, offset, NULL, NULL, NULL);
+ offset = get_ber_length(tvb, offset, NULL, NULL);
+ offset = dissect_snmp_UsmSecurityParameters(FALSE, tvb, offset, actx, tree, -1);
+ usm_p.user_assoc = get_user_assoc(usm_p.engine_tvb, usm_p.user_tvb, actx->pinfo);
+ break;
+ case SNMP_SEC_ANY: /* 0 */
+ case SNMP_SEC_V1: /* 1 */
+ case SNMP_SEC_V2C: /* 2 */
+ default:
+ offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ break;
+ }
+
+
+ return offset;
+}
+
+
+static const ber_sequence_t ScopedPDU_sequence[] = {
+ { &hf_snmp_contextEngineID, BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_SnmpEngineID },
+ { &hf_snmp_contextName , BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_OCTET_STRING },
+ { &hf_snmp_data , BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG|BER_FLAGS_NOTCHKTAG, dissect_snmp_PDUs },
+ { NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_ScopedPDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
+ ScopedPDU_sequence, hf_index, ett_snmp_ScopedPDU);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_T_encryptedPDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ tvbuff_t* crypt_tvb;
+ offset = dissect_ber_octet_string(FALSE, actx, tree, tvb, offset, hf_snmp_encryptedPDU, &crypt_tvb);
+
+ if( usm_p.encrypted && crypt_tvb
+ && usm_p.user_assoc
+ && usm_p.user_assoc->user.privProtocol ) {
+
+ const gchar* error = NULL;
+ proto_tree* encryptedpdu_tree = proto_item_add_subtree(actx->created_item,ett_encryptedPDU);
+ tvbuff_t* cleartext_tvb = usm_p.user_assoc->user.privProtocol(&usm_p, crypt_tvb, actx->pinfo, &error );
+
+ if (! cleartext_tvb) {
+ proto_tree_add_expert_format(encryptedpdu_tree, actx->pinfo, &ei_snmp_failed_decrypted_data_pdu,
+ crypt_tvb, 0, -1, "Failed to decrypt encryptedPDU: %s", error);
+
+ col_set_str(actx->pinfo->cinfo, COL_INFO, "encryptedPDU: Failed to decrypt");
+
+ return offset;
+ } else {
+ proto_item* decrypted_item;
+ proto_tree* decrypted_tree;
+
+ if (! check_ScopedPdu(cleartext_tvb)) {
+ proto_tree_add_expert(encryptedpdu_tree, actx->pinfo, &ei_snmp_decrypted_data_bad_formatted, cleartext_tvb, 0, -1);
+
+ col_set_str(actx->pinfo->cinfo, COL_INFO, "encryptedPDU: Decrypted data not formatted as expected");
+
+ return offset;
+ }
+
+
+ add_new_data_source(actx->pinfo, cleartext_tvb, "Decrypted ScopedPDU");
+
+ decrypted_item = proto_tree_add_item(encryptedpdu_tree, hf_snmp_decryptedPDU,cleartext_tvb,0,-1,ENC_NA);
+ decrypted_tree = proto_item_add_subtree(decrypted_item,ett_decrypted);
+ dissect_snmp_ScopedPDU(FALSE, cleartext_tvb, 0, actx, decrypted_tree, -1);
+ }
+ } else {
+ col_set_str(actx->pinfo->cinfo, COL_INFO, "encryptedPDU: privKey Unknown");
+ }
+
+
+ return offset;
+}
+
+
+static const value_string snmp_ScopedPduData_vals[] = {
+ { 0, "plaintext" },
+ { 1, "encryptedPDU" },
+ { 0, NULL }
+};
+
+static const ber_choice_t ScopedPduData_choice[] = {
+ { 0, &hf_snmp_plaintext , BER_CLASS_UNI, BER_UNI_TAG_SEQUENCE, BER_FLAGS_NOOWNTAG, dissect_snmp_ScopedPDU },
+ { 1, &hf_snmp_encryptedPDU , BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_T_encryptedPDU },
+ { 0, NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_ScopedPduData(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_choice(actx, tree, tvb, offset,
+ ScopedPduData_choice, hf_index, ett_snmp_ScopedPduData,
+ NULL);
+
+ return offset;
+}
+
+
+static const ber_sequence_t SNMPv3Message_sequence[] = {
+ { &hf_snmp_msgVersion , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_Version },
+ { &hf_snmp_msgGlobalData , BER_CLASS_UNI, BER_UNI_TAG_SEQUENCE, BER_FLAGS_NOOWNTAG, dissect_snmp_HeaderData },
+ { &hf_snmp_msgSecurityParameters, BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_T_msgSecurityParameters },
+ { &hf_snmp_msgData , BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG|BER_FLAGS_NOTCHKTAG, dissect_snmp_ScopedPduData },
+ { NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_SNMPv3Message(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
+ SNMPv3Message_sequence, hf_index, ett_snmp_SNMPv3Message);
+
+
+ if( usm_p.authenticated
+ && usm_p.user_assoc ) {
+ const gchar* error = NULL;
+ proto_item* authen_item;
+ proto_tree* authen_tree = proto_item_add_subtree(usm_p.auth_item,ett_authParameters);
+ guint8* calc_auth = NULL;
+ guint calc_auth_len = 0;
+
+ usm_p.authOK = snmp_usm_auth(actx->pinfo, usm_p.user_assoc->user.authModel, &usm_p, &calc_auth, &calc_auth_len, &error );
+
+ if (error) {
+ expert_add_info_format( actx->pinfo, usm_p.auth_item, &ei_snmp_verify_authentication_error, "Error while verifying Message authenticity: %s", error );
+ } else {
+ expert_field* expert;
+
+ authen_item = proto_tree_add_boolean(authen_tree, hf_snmp_msgAuthentication, tvb, 0, 0, usm_p.authOK);
+ proto_item_set_generated(authen_item);
+
+ if (usm_p.authOK) {
+ expert = &ei_snmp_authentication_ok;
+ } else {
+ const gchar* calc_auth_str = bytes_to_str_punct(actx->pinfo->pool, calc_auth,calc_auth_len,' ');
+ proto_item_append_text(authen_item, " calculated = %s", calc_auth_str);
+ expert = &ei_snmp_authentication_error;
+ }
+
+ expert_add_info( actx->pinfo, authen_item, expert);
+ }
+ }
+
+ return offset;
+}
+
+
+static const value_string snmp_T_smux_version_vals[] = {
+ { 0, "version-1" },
+ { 0, NULL }
+};
+
+
+static int
+dissect_snmp_T_smux_version(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_OBJECT_IDENTIFIER(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_object_identifier(implicit_tag, actx, tree, tvb, offset, hf_index, NULL);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_DisplayString(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+static const ber_sequence_t SimpleOpen_U_sequence[] = {
+ { &hf_snmp_smux_version , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_T_smux_version },
+ { &hf_snmp_identity , BER_CLASS_UNI, BER_UNI_TAG_OID, BER_FLAGS_NOOWNTAG, dissect_snmp_OBJECT_IDENTIFIER },
+ { &hf_snmp_description , BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_DisplayString },
+ { &hf_snmp_password , BER_CLASS_UNI, BER_UNI_TAG_OCTETSTRING, BER_FLAGS_NOOWNTAG, dissect_snmp_OCTET_STRING },
+ { NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_SimpleOpen_U(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
+ SimpleOpen_U_sequence, hf_index, ett_snmp_SimpleOpen_U);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_SimpleOpen(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_APP, 0, TRUE, dissect_snmp_SimpleOpen_U);
+
+ return offset;
+}
+
+
+static const value_string snmp_OpenPDU_vals[] = {
+ { 0, "smux-simple" },
+ { 0, NULL }
+};
+
+static const ber_choice_t OpenPDU_choice[] = {
+ { 0, &hf_snmp_smux_simple , BER_CLASS_APP, 0, BER_FLAGS_NOOWNTAG, dissect_snmp_SimpleOpen },
+ { 0, NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_OpenPDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_choice(actx, tree, tvb, offset,
+ OpenPDU_choice, hf_index, ett_snmp_OpenPDU,
+ NULL);
+
+ return offset;
+}
+
+
+static const value_string snmp_ClosePDU_U_vals[] = {
+ { 0, "goingDown" },
+ { 1, "unsupportedVersion" },
+ { 2, "packetFormat" },
+ { 3, "protocolError" },
+ { 4, "internalError" },
+ { 5, "authenticationFailure" },
+ { 0, NULL }
+};
+
+
+static int
+dissect_snmp_ClosePDU_U(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_ClosePDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_APP, 1, TRUE, dissect_snmp_ClosePDU_U);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_INTEGER_M1_2147483647(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+static const value_string snmp_T_operation_vals[] = {
+ { 0, "delete" },
+ { 1, "readOnly" },
+ { 2, "readWrite" },
+ { 0, NULL }
+};
+
+
+static int
+dissect_snmp_T_operation(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+static const ber_sequence_t RReqPDU_U_sequence[] = {
+ { &hf_snmp_subtree , BER_CLASS_UNI, BER_UNI_TAG_OID, BER_FLAGS_NOOWNTAG, dissect_snmp_ObjectName },
+ { &hf_snmp_priority , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_INTEGER_M1_2147483647 },
+ { &hf_snmp_operation , BER_CLASS_UNI, BER_UNI_TAG_INTEGER, BER_FLAGS_NOOWNTAG, dissect_snmp_T_operation },
+ { NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_RReqPDU_U(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_sequence(implicit_tag, actx, tree, tvb, offset,
+ RReqPDU_U_sequence, hf_index, ett_snmp_RReqPDU_U);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_RReqPDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_APP, 2, TRUE, dissect_snmp_RReqPDU_U);
+
+ return offset;
+}
+
+
+static const value_string snmp_RRspPDU_U_vals[] = {
+ { -1, "failure" },
+ { 0, NULL }
+};
+
+
+static int
+dissect_snmp_RRspPDU_U(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_RRspPDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_APP, 3, TRUE, dissect_snmp_RRspPDU_U);
+
+ return offset;
+}
+
+
+static const value_string snmp_RegisterResponse_vals[] = {
+ { 0, "rRspPDU" },
+ { 1, "pDUs" },
+ { 0, NULL }
+};
+
+static const ber_choice_t RegisterResponse_choice[] = {
+ { 0, &hf_snmp_rRspPDU , BER_CLASS_APP, 3, BER_FLAGS_NOOWNTAG, dissect_snmp_RRspPDU },
+ { 1, &hf_snmp_pDUs , BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG, dissect_snmp_PDUs },
+ { 0, NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_RegisterResponse(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_choice(actx, tree, tvb, offset,
+ RegisterResponse_choice, hf_index, ett_snmp_RegisterResponse,
+ NULL);
+
+ return offset;
+}
+
+
+static const value_string snmp_SOutPDU_U_vals[] = {
+ { 0, "commit" },
+ { 1, "rollback" },
+ { 0, NULL }
+};
+
+
+static int
+dissect_snmp_SOutPDU_U(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_integer(implicit_tag, actx, tree, tvb, offset, hf_index,
+ NULL);
+
+ return offset;
+}
+
+
+
+static int
+dissect_snmp_SOutPDU(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+ offset = dissect_ber_tagged_type(implicit_tag, actx, tree, tvb, offset,
+ hf_index, BER_CLASS_APP, 4, TRUE, dissect_snmp_SOutPDU_U);
+
+ return offset;
+}
+
+
+static const value_string snmp_SMUX_PDUs_vals[] = {
+ { 0, "open" },
+ { 1, "close" },
+ { 2, "registerRequest" },
+ { 3, "registerResponse" },
+ { 4, "commitOrRollback" },
+ { 0, NULL }
+};
+
+static const ber_choice_t SMUX_PDUs_choice[] = {
+ { 0, &hf_snmp_open , BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG, dissect_snmp_OpenPDU },
+ { 1, &hf_snmp_close , BER_CLASS_APP, 1, BER_FLAGS_NOOWNTAG, dissect_snmp_ClosePDU },
+ { 2, &hf_snmp_registerRequest, BER_CLASS_APP, 2, BER_FLAGS_NOOWNTAG, dissect_snmp_RReqPDU },
+ { 3, &hf_snmp_registerResponse, BER_CLASS_ANY/*choice*/, -1/*choice*/, BER_FLAGS_NOOWNTAG, dissect_snmp_RegisterResponse },
+ { 4, &hf_snmp_commitOrRollback, BER_CLASS_APP, 4, BER_FLAGS_NOOWNTAG, dissect_snmp_SOutPDU },
+ { 0, NULL, 0, 0, 0, NULL }
+};
+
+static int
+dissect_snmp_SMUX_PDUs(bool implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
+
+ snmp_conv_info_t *snmp_info = snmp_find_conversation_and_get_conv_data(actx->pinfo);
+
+ actx->private_data = snmp_info;
+
+ offset = dissect_ber_choice(actx, tree, tvb, offset,
+ SMUX_PDUs_choice, hf_index, ett_snmp_SMUX_PDUs,
+ NULL);
+
+ return offset;
+}
+
+/*--- PDUs ---*/
+
+static int dissect_SMUX_PDUs_PDU(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_, void *data _U_) {
+ int offset = 0;
+ asn1_ctx_t asn1_ctx;
+ asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
+ offset = dissect_snmp_SMUX_PDUs(FALSE, tvb, offset, &asn1_ctx, tree, hf_snmp_SMUX_PDUs_PDU);
+ return offset;
+}
+
+
+static snmp_conv_info_t*
+snmp_find_conversation_and_get_conv_data(packet_info *pinfo) {
+
+ conversation_t *conversation = NULL;
+ snmp_conv_info_t *snmp_info = NULL;
+
+ /* Get the conversation with the wildcarded port, if it exists
+ * and is associated with SNMP, so that requests and responses
+ * can be matched even if the response comes from a different,
+ * ephemeral, source port, as originally done in OS/400.
+ * On UDP, we do not automatically call conversation_set_port2()
+ * and we do not want to do so. Possibly this should eventually
+ * use find_conversation_full and separate the "SNMP conversation"
+ * from "the transport layer conversation that carries SNMP."
+ */
+ if (pinfo->destport == UDP_PORT_SNMP) {
+ conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst, conversation_pt_to_conversation_type(pinfo->ptype),
+ pinfo->srcport, 0, NO_PORT_B);
+ } else if (pinfo->srcport == UDP_PORT_SNMP) {
+ conversation = find_conversation(pinfo->fd->num, &pinfo->dst, &pinfo->src, conversation_pt_to_conversation_type(pinfo->ptype),
+ pinfo->destport, 0, NO_PORT_B);
+ }
+ if ((conversation == NULL) || (conversation_get_dissector(conversation, pinfo->num) != snmp_handle)) {
+ conversation = find_or_create_conversation(pinfo);
+ }
+
+ snmp_info = (snmp_conv_info_t *)conversation_get_proto_data(conversation, proto_snmp);
+ if (snmp_info == NULL) {
+ snmp_info = wmem_new0(wmem_file_scope(), snmp_conv_info_t);
+ snmp_info->request_response=wmem_map_new(wmem_file_scope(), g_int_hash, g_int_equal);
+
+ conversation_add_proto_data(conversation, proto_snmp, snmp_info);
+ }
+ return snmp_info;
+}
+
+guint
+dissect_snmp_pdu(tvbuff_t *tvb, int offset, packet_info *pinfo,
+ proto_tree *tree, int proto, gint ett, gboolean is_tcp)
+{
+
+ guint length_remaining;
+ gint8 ber_class;
+ bool pc, ind = 0;
+ gint32 tag;
+ guint32 len;
+ guint message_length;
+ int start_offset = offset;
+ guint32 version = 0;
+ tvbuff_t *next_tvb;
+
+ proto_tree *snmp_tree = NULL;
+ proto_item *item = NULL;
+
+ snmp_conv_info_t *snmp_info = snmp_find_conversation_and_get_conv_data(pinfo);
+
+ asn1_ctx_t asn1_ctx;
+ asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
+
+ asn1_ctx.private_data = snmp_info;
+
+ usm_p.msg_tvb = tvb;
+ usm_p.start_offset = tvb_offset_from_real_beginning(tvb);
+ usm_p.engine_tvb = NULL;
+ usm_p.user_tvb = NULL;
+ usm_p.auth_item = NULL;
+ usm_p.auth_tvb = NULL;
+ usm_p.auth_offset = 0;
+ usm_p.priv_tvb = NULL;
+ usm_p.user_assoc = NULL;
+ usm_p.authenticated = FALSE;
+ usm_p.encrypted = FALSE;
+ usm_p.boots = 0;
+ usm_p.snmp_time = 0;
+ usm_p.authOK = FALSE;
+
+ /*
+ * This will throw an exception if we don't have any data left.
+ * That's what we want. (See "tcp_dissect_pdus()", which is
+ * similar, but doesn't have to deal with ASN.1.
+ * XXX - can we make "tcp_dissect_pdus()" provide enough
+ * information to the "get_pdu_len" routine so that we could
+ * have that routine deal with ASN.1, and just use
+ * "tcp_dissect_pdus()"?)
+ */
+ length_remaining = tvb_ensure_captured_length_remaining(tvb, offset);
+
+ /* NOTE: we have to parse the message piece by piece, since the
+ * capture length may be less than the message length: a 'global'
+ * parsing is likely to fail.
+ */
+
+ /*
+ * If this is SNMP-over-TCP, we might have to do reassembly
+ * in order to read the "Sequence Of" header.
+ */
+ if (is_tcp && snmp_desegment && pinfo->can_desegment) {
+ /*
+ * This is TCP, and we should, and can, do reassembly.
+ *
+ * Is the "Sequence Of" header split across segment
+ * boundaries? We require at least 6 bytes for the
+ * header, which allows for a 4-byte length (ASN.1
+ * BER).
+ */
+ if (length_remaining < 6) {
+ /*
+ * Yes. Tell the TCP dissector where the data
+ * for this message starts in the data it handed
+ * us and that we need "some more data." Don't tell
+ * it exactly how many bytes we need because if/when
+ * we ask for even more (after the header) that will
+ * break reassembly.
+ */
+ pinfo->desegment_offset = offset;
+ pinfo->desegment_len = DESEGMENT_ONE_MORE_SEGMENT;
+ return 0;
+ }
+ }
+
+ /*
+ * OK, try to read the "Sequence Of" header; this gets the total
+ * length of the SNMP message.
+ */
+ offset = get_ber_identifier(tvb, offset, &ber_class, &pc, &tag);
+ /*Get the total octet length of the SNMP data*/
+ offset = get_ber_length(tvb, offset, &len, &ind);
+ message_length = len + offset;
+
+ /*Get the SNMP version data*/
+ /*offset =*/ dissect_ber_integer(FALSE, &asn1_ctx, 0, tvb, offset, -1, &version);
+
+
+ /*
+ * If this is SNMP-over-TCP, we might have to do reassembly
+ * to get all of this message.
+ */
+ if (is_tcp && snmp_desegment && pinfo->can_desegment) {
+ /*
+ * Yes - is the message split across segment boundaries?
+ */
+ if (length_remaining < message_length) {
+ /*
+ * Yes. Tell the TCP dissector where the data
+ * for this message starts in the data it handed
+ * us, and how many more bytes we need, and
+ * return.
+ */
+ pinfo->desegment_offset = start_offset;
+ pinfo->desegment_len =
+ message_length - length_remaining;
+
+ /*
+ * Return 0, which means "I didn't dissect anything
+ * because I don't have enough data - we need
+ * to desegment".
+ */
+ return 0;
+ }
+ }
+
+ var_list = next_tvb_list_new(pinfo->pool);
+
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, proto_get_protocol_short_name(find_protocol_by_id(proto)));
+
+ item = proto_tree_add_item(tree, proto, tvb, start_offset, message_length, ENC_BIG_ENDIAN);
+ snmp_tree = proto_item_add_subtree(item, ett);
+
+ switch (version) {
+ case 0: /* v1 */
+ case 1: /* v2c */
+ offset = dissect_snmp_Message(FALSE , tvb, start_offset, &asn1_ctx, snmp_tree, -1);
+ break;
+ case 2: /* v2u */
+ offset = dissect_snmp_Messagev2u(FALSE , tvb, start_offset, &asn1_ctx, snmp_tree, -1);
+ break;
+ /* v3 */
+ case 3:
+ offset = dissect_snmp_SNMPv3Message(FALSE , tvb, start_offset, &asn1_ctx, snmp_tree, -1);
+ break;
+ default:
+ /*
+ * Return the length remaining in the tvbuff, so
+ * if this is SNMP-over-TCP, our caller thinks there's
+ * nothing left to dissect.
+ */
+ expert_add_info(pinfo, item, &ei_snmp_version_unknown);
+ return length_remaining;
+ break;
+ }
+
+ /* There may be appended data after the SNMP data, so treat as raw
+ * data which needs to be dissected in case of UDP as UDP is PDU oriented.
+ */
+ if((!is_tcp) && (length_remaining > (guint)offset)) {
+ next_tvb = tvb_new_subset_remaining(tvb, offset);
+ call_dissector(data_handle, next_tvb, pinfo, tree);
+ } else {
+ next_tvb_call(var_list, pinfo, tree, NULL, data_handle);
+ }
+
+ return offset;
+}
+
+static gint
+dissect_snmp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
+{
+ int offset;
+ gint8 tmp_class;
+ bool tmp_pc;
+ gint32 tmp_tag;
+ guint32 tmp_length;
+ bool tmp_ind;
+
+ /*
+ * See if this looks like SNMP or not. if not, return 0 so
+ * wireshark can try some other dissector instead.
+ */
+ /* All SNMP packets are BER encoded and consist of a SEQUENCE
+ * that spans the entire PDU. The first item is an INTEGER that
+ * has the values 0-2 (version 1-3).
+ * if not it is not snmp.
+ */
+ /* SNMP starts with a SEQUENCE */
+ offset = get_ber_identifier(tvb, 0, &tmp_class, &tmp_pc, &tmp_tag);
+ if((tmp_class!=BER_CLASS_UNI)||(tmp_tag!=BER_UNI_TAG_SEQUENCE)) {
+ return 0;
+ }
+ /* then comes a length which spans the rest of the tvb */
+ offset = get_ber_length(tvb, offset, &tmp_length, &tmp_ind);
+ /* Loosen the heuristic a bit to handle the case where data has intentionally
+ * been added after the snmp PDU ( UDP case) (#3684)
+ * If this is fragmented or carried in ICMP, we don't expect the tvb to
+ * have the full legnth, so don't check.
+ */
+ if (!pinfo->fragmented && !pinfo->flags.in_error_pkt) {
+ if ( pinfo->ptype == PT_UDP ) {
+ if(tmp_length>(guint32)tvb_reported_length_remaining(tvb, offset)) {
+ return 0;
+ }
+ }else{
+ if(tmp_length!=(guint32)tvb_reported_length_remaining(tvb, offset)) {
+ return 0;
+ }
+ }
+ }
+ /* then comes an INTEGER (version)*/
+ get_ber_identifier(tvb, offset, &tmp_class, &tmp_pc, &tmp_tag);
+ if((tmp_class!=BER_CLASS_UNI)||(tmp_tag!=BER_UNI_TAG_INTEGER)) {
+ return 0;
+ }
+ /* do we need to test that version is 0 - 2 (version1-3) ? */
+
+
+ /*
+ * The IBM i (OS/400) SNMP agent, at least originally, would
+ * send responses back from some *other* UDP port, an ephemeral
+ * port above 5000, going back to the same IP address and port
+ * from which the request came, similar to TFTP. This only happens
+ * with the agent port, 161, not with the trap port, etc. As of
+ * 2015 with the latest fixes applied, it no longer does this:
+ * https://www.ibm.com/support/pages/ptf/SI55487
+ * https://www.ibm.com/support/pages/ptf/SI55537
+ *
+ * The SNMP RFCs are silent on this (cf. L2TP RFC 2661, which
+ * supports using either the well-known port or an ephemeral
+ * port as the source port for responses, while noting that
+ * the latter can cause issues with firewalls and NATs.) so
+ * possibly some other implementations could do this.
+ *
+ * If this packet went to the SNMP port, we check to see if
+ * there's already a conversation with one address/port pair
+ * matching the source IP address and port of this packet,
+ * the other address matching the destination IP address of this
+ * packet, and any destination port.
+ *
+ * If not, we create one, with its address 1/port 1 pair being
+ * the source address/port of this packet, its address 2 being
+ * the destination address of this packet, and its port 2 being
+ * wildcarded, and give it the SNMP dissector as a dissector.
+ */
+
+ if (pinfo->destport == UDP_PORT_SNMP) {
+ conversation_t *conversation = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst, conversation_pt_to_conversation_type(pinfo->ptype),
+ pinfo->srcport, 0, NO_PORT_B);
+
+ if( (conversation == NULL) || (conversation_get_dissector(conversation, pinfo->num)!=snmp_handle) ) {
+ conversation = conversation_new(pinfo->num, &pinfo->src, &pinfo->dst, conversation_pt_to_conversation_type(pinfo->ptype),
+ pinfo->srcport, 0, NO_PORT2);
+ conversation_set_dissector(conversation, snmp_handle);
+ }
+ }
+
+ return dissect_snmp_pdu(tvb, 0, pinfo, tree, proto_snmp, ett_snmp, FALSE);
+}
+
+static int
+dissect_snmp_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
+{
+ int offset = 0;
+ guint message_len;
+
+ while (tvb_reported_length_remaining(tvb, offset) > 0) {
+ message_len = dissect_snmp_pdu(tvb, offset, pinfo, tree, proto_snmp, ett_snmp, TRUE);
+ if (message_len == 0) {
+ /*
+ * We don't have all the data for that message,
+ * so we need to do desegmentation;
+ * "dissect_snmp_pdu()" has set that up.
+ */
+ break;
+ }
+ offset += message_len;
+ }
+ return tvb_captured_length(tvb);
+}
+
+static int
+dissect_smux(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
+{
+ proto_tree *smux_tree = NULL;
+ proto_item *item = NULL;
+
+ var_list = next_tvb_list_new(pinfo->pool);
+
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "SMUX");
+
+ item = proto_tree_add_item(tree, proto_smux, tvb, 0, -1, ENC_NA);
+ smux_tree = proto_item_add_subtree(item, ett_smux);
+
+ return dissect_SMUX_PDUs_PDU(tvb, pinfo, smux_tree, data);
+}
+
+/*
+ MD5 Password to Key Algorithm from RFC 3414 A.2.1
+ SHA1 Password to Key Algorithm from RFC 3414 A.2.2
+ SHA2 Password to Key Algorithm from RFC 7860 9.3
+*/
+static void
+snmp_usm_password_to_key(const snmp_usm_auth_model_t model, const guint8 *password,
+ guint passwordlen, const guint8 *engineID, guint engineLength, guint8 *key)
+{
+ gcry_md_hd_t hash_handle;
+ guint8 *cp, password_buf[64];
+ guint32 password_index = 0;
+ guint32 count = 0, i;
+ guint hash_len;
+
+ if (gcry_md_open(&hash_handle, auth_hash_algo[model], 0)) {
+ return;
+ }
+
+ hash_len = auth_hash_len[model];
+
+ /**********************************************/
+ /* Use while loop until we've done 1 Megabyte */
+ /**********************************************/
+ while (count < 1048576) {
+ cp = password_buf;
+ if (passwordlen != 0) {
+ for (i = 0; i < 64; i++) {
+ /*************************************************/
+ /* Take the next octet of the password, wrapping */
+ /* to the beginning of the password as necessary.*/
+ /*************************************************/
+ *cp++ = password[password_index++ % passwordlen];
+ }
+ } else {
+ *cp = 0;
+ }
+ gcry_md_write(hash_handle, password_buf, 64);
+ count += 64;
+ }
+ memcpy(key, gcry_md_read(hash_handle, 0), hash_len);
+ gcry_md_close(hash_handle);
+
+ /*****************************************************/
+ /* Now localise the key with the engineID and pass */
+ /* through hash function to produce final key */
+ /* We ignore invalid engineLengths here. More strict */
+ /* checking is done in snmp_users_update_cb. */
+ /*****************************************************/
+ if (gcry_md_open(&hash_handle, auth_hash_algo[model], 0)) {
+ return;
+ }
+ gcry_md_write(hash_handle, key, hash_len);
+ gcry_md_write(hash_handle, engineID, engineLength);
+ gcry_md_write(hash_handle, key, hash_len);
+ memcpy(key, gcry_md_read(hash_handle, 0), hash_len);
+ gcry_md_close(hash_handle);
+ return;
+}
+
+static void
+process_prefs(void)
+{
+}
+
+UAT_LSTRING_CB_DEF(snmp_users,userName,snmp_ue_assoc_t,user.userName.data,user.userName.len)
+UAT_LSTRING_CB_DEF(snmp_users,authPassword,snmp_ue_assoc_t,user.authPassword.data,user.authPassword.len)
+UAT_LSTRING_CB_DEF(snmp_users,privPassword,snmp_ue_assoc_t,user.privPassword.data,user.privPassword.len)
+UAT_BUFFER_CB_DEF(snmp_users,engine_id,snmp_ue_assoc_t,engine.data,engine.len)
+UAT_VS_DEF(snmp_users,auth_model,snmp_ue_assoc_t,guint,0,"MD5")
+UAT_VS_DEF(snmp_users,priv_proto,snmp_ue_assoc_t,guint,0,"DES")
+
+static void *
+snmp_specific_trap_copy_cb(void *dest, const void *orig, size_t len _U_)
+{
+ snmp_st_assoc_t *u = (snmp_st_assoc_t *)dest;
+ const snmp_st_assoc_t *o = (const snmp_st_assoc_t *)orig;
+
+ u->enterprise = g_strdup(o->enterprise);
+ u->trap = o->trap;
+ u->desc = g_strdup(o->desc);
+
+ return dest;
+}
+
+static void
+snmp_specific_trap_free_cb(void *r)
+{
+ snmp_st_assoc_t *u = (snmp_st_assoc_t *)r;
+
+ g_free(u->enterprise);
+ g_free(u->desc);
+}
+
+UAT_CSTRING_CB_DEF(specific_traps, enterprise, snmp_st_assoc_t)
+UAT_DEC_CB_DEF(specific_traps, trap, snmp_st_assoc_t)
+UAT_CSTRING_CB_DEF(specific_traps, desc, snmp_st_assoc_t)
+
+ /*--- proto_register_snmp -------------------------------------------*/
+void proto_register_snmp(void) {
+ /* List of fields */
+ static hf_register_info hf[] = {
+ { &hf_snmp_response_in,
+ { "Response In", "snmp.response_in", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
+ "The response to this SNMP request is in this frame", HFILL }},
+ { &hf_snmp_response_to,
+ { "Response To", "snmp.response_to", FT_FRAMENUM, BASE_NONE, NULL, 0x0,
+ "This is a response to the SNMP request in this frame", HFILL }},
+ { &hf_snmp_time,
+ { "Time", "snmp.time", FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
+ "The time between the Request and the Response", HFILL }},
+ { &hf_snmp_v3_flags_auth,
+ { "Authenticated", "snmp.v3.flags.auth", FT_BOOLEAN, 8,
+ TFS(&tfs_set_notset), TH_AUTH, NULL, HFILL }},
+ { &hf_snmp_v3_flags_crypt,
+ { "Encrypted", "snmp.v3.flags.crypt", FT_BOOLEAN, 8,
+ TFS(&tfs_set_notset), TH_CRYPT, NULL, HFILL }},
+ { &hf_snmp_v3_flags_report,
+ { "Reportable", "snmp.v3.flags.report", FT_BOOLEAN, 8,
+ TFS(&tfs_set_notset), TH_REPORT, NULL, HFILL }},
+ { &hf_snmp_engineid_conform, {
+ "Engine ID Conformance", "snmp.engineid.conform", FT_BOOLEAN, 8,
+ TFS(&tfs_snmp_engineid_conform), F_SNMP_ENGINEID_CONFORM, "Engine ID RFC3411 Conformance", HFILL }},
+ { &hf_snmp_engineid_enterprise, {
+ "Engine Enterprise ID", "snmp.engineid.enterprise", FT_UINT32, BASE_ENTERPRISES,
+ STRINGS_ENTERPRISES, 0, NULL, HFILL }},
+ { &hf_snmp_engineid_format, {
+ "Engine ID Format", "snmp.engineid.format", FT_UINT8, BASE_DEC,
+ VALS(snmp_engineid_format_vals), 0, NULL, HFILL }},
+ { &hf_snmp_engineid_ipv4, {
+ "Engine ID Data: IPv4 address", "snmp.engineid.ipv4", FT_IPv4, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_engineid_ipv6, {
+ "Engine ID Data: IPv6 address", "snmp.engineid.ipv6", FT_IPv6, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_engineid_cisco_type, {
+ "Engine ID Data: Cisco type", "snmp.engineid.cisco.type", FT_UINT8, BASE_HEX,
+ VALS(snmp_engineid_cisco_type_vals), 0, NULL, HFILL }},
+ { &hf_snmp_engineid_mac, {
+ "Engine ID Data: MAC address", "snmp.engineid.mac", FT_ETHER, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_engineid_text, {
+ "Engine ID Data: Text", "snmp.engineid.text", FT_STRING, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_engineid_time, {
+ "Engine ID Data: Creation Time", "snmp.engineid.time", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_engineid_data, {
+ "Engine ID Data", "snmp.engineid.data", FT_BYTES, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_msgAuthentication, {
+ "Authentication", "snmp.v3.auth", FT_BOOLEAN, BASE_NONE,
+ TFS(&auth_flags), 0, NULL, HFILL }},
+ { &hf_snmp_decryptedPDU, {
+ "Decrypted ScopedPDU", "snmp.decrypted_pdu", FT_BYTES, BASE_NONE,
+ NULL, 0, "Decrypted PDU", HFILL }},
+ { &hf_snmp_noSuchObject, {
+ "noSuchObject", "snmp.noSuchObject", FT_NONE, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_noSuchInstance, {
+ "noSuchInstance", "snmp.noSuchInstance", FT_NONE, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_endOfMibView, {
+ "endOfMibView", "snmp.endOfMibView", FT_NONE, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_unSpecified, {
+ "unSpecified", "snmp.unSpecified", FT_NONE, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+
+ { &hf_snmp_integer32_value, {
+ "Value (Integer32)", "snmp.value.int", FT_INT64, BASE_DEC,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_octetstring_value, {
+ "Value (OctetString)", "snmp.value.octets", FT_BYTES, BASE_SHOW_ASCII_PRINTABLE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_oid_value, {
+ "Value (OID)", "snmp.value.oid", FT_OID, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_null_value, {
+ "Value (Null)", "snmp.value.null", FT_NONE, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_ipv4_value, {
+ "Value (IpAddress)", "snmp.value.ipv4", FT_IPv4, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_ipv6_value, {
+ "Value (IpAddress)", "snmp.value.ipv6", FT_IPv6, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_anyaddress_value, {
+ "Value (IpAddress)", "snmp.value.addr", FT_BYTES, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_unsigned32_value, {
+ "Value (Unsigned32)", "snmp.value.u32", FT_INT64, BASE_DEC,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_gauge32_value, {
+ "Value (Gauge32)", "snmp.value.g32", FT_INT64, BASE_DEC,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_unknown_value, {
+ "Value (Unknown)", "snmp.value.unk", FT_BYTES, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_counter_value, {
+ "Value (Counter32)", "snmp.value.counter", FT_UINT64, BASE_DEC,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_big_counter_value, {
+ "Value (Counter64)", "snmp.value.counter", FT_UINT64, BASE_DEC,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_nsap_value, {
+ "Value (NSAP)", "snmp.value.nsap", FT_UINT64, BASE_DEC,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_timeticks_value, {
+ "Value (Timeticks)", "snmp.value.timeticks", FT_UINT64, BASE_DEC,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_opaque_value, {
+ "Value (Opaque)", "snmp.value.opaque", FT_BYTES, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_objectname, {
+ "Object Name", "snmp.name", FT_OID, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_scalar_instance_index, {
+ "Scalar Instance Index", "snmp.name.index", FT_UINT64, BASE_DEC,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_var_bind_str, {
+ "Variable-binding-string", "snmp.var-bind_str", FT_STRING, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+ { &hf_snmp_agentid_trailer, {
+ "AgentID Trailer", "snmp.agentid_trailer", FT_BYTES, BASE_NONE,
+ NULL, 0, NULL, HFILL }},
+
+
+ { &hf_snmp_SMUX_PDUs_PDU,
+ { "SMUX-PDUs", "snmp.SMUX_PDUs",
+ FT_UINT32, BASE_DEC, VALS(snmp_SMUX_PDUs_vals), 0,
+ NULL, HFILL }},
+ { &hf_snmp_version,
+ { "version", "snmp.version",
+ FT_INT32, BASE_DEC, VALS(snmp_Version_vals), 0,
+ NULL, HFILL }},
+ { &hf_snmp_community,
+ { "community", "snmp.community",
+ FT_STRING, BASE_NONE, NULL, 0,
+ NULL, HFILL }},
+ { &hf_snmp_data,
+ { "data", "snmp.data",
+ FT_UINT32, BASE_DEC, VALS(snmp_PDUs_vals), 0,
+ "PDUs", HFILL }},
+ { &hf_snmp_parameters,
+ { "parameters", "snmp.parameters",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ "OCTET_STRING", HFILL }},
+ { &hf_snmp_datav2u,
+ { "datav2u", "snmp.datav2u",
+ FT_UINT32, BASE_DEC, VALS(snmp_T_datav2u_vals), 0,
+ NULL, HFILL }},
+ { &hf_snmp_v2u_plaintext,
+ { "plaintext", "snmp.plaintext",
+ FT_UINT32, BASE_DEC, VALS(snmp_PDUs_vals), 0,
+ "PDUs", HFILL }},
+ { &hf_snmp_encrypted,
+ { "encrypted", "snmp.encrypted",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ "OCTET_STRING", HFILL }},
+ { &hf_snmp_msgAuthoritativeEngineID,
+ { "msgAuthoritativeEngineID", "snmp.msgAuthoritativeEngineID",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ NULL, HFILL }},
+ { &hf_snmp_msgAuthoritativeEngineBoots,
+ { "msgAuthoritativeEngineBoots", "snmp.msgAuthoritativeEngineBoots",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ NULL, HFILL }},
+ { &hf_snmp_msgAuthoritativeEngineTime,
+ { "msgAuthoritativeEngineTime", "snmp.msgAuthoritativeEngineTime",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ NULL, HFILL }},
+ { &hf_snmp_msgUserName,
+ { "msgUserName", "snmp.msgUserName",
+ FT_STRING, BASE_NONE, NULL, 0,
+ NULL, HFILL }},
+ { &hf_snmp_msgAuthenticationParameters,
+ { "msgAuthenticationParameters", "snmp.msgAuthenticationParameters",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ NULL, HFILL }},
+ { &hf_snmp_msgPrivacyParameters,
+ { "msgPrivacyParameters", "snmp.msgPrivacyParameters",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ NULL, HFILL }},
+ { &hf_snmp_msgVersion,
+ { "msgVersion", "snmp.msgVersion",
+ FT_INT32, BASE_DEC, VALS(snmp_Version_vals), 0,
+ "Version", HFILL }},
+ { &hf_snmp_msgGlobalData,
+ { "msgGlobalData", "snmp.msgGlobalData_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "HeaderData", HFILL }},
+ { &hf_snmp_msgSecurityParameters,
+ { "msgSecurityParameters", "snmp.msgSecurityParameters",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ NULL, HFILL }},
+ { &hf_snmp_msgData,
+ { "msgData", "snmp.msgData",
+ FT_UINT32, BASE_DEC, VALS(snmp_ScopedPduData_vals), 0,
+ "ScopedPduData", HFILL }},
+ { &hf_snmp_msgID,
+ { "msgID", "snmp.msgID",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "INTEGER_0_2147483647", HFILL }},
+ { &hf_snmp_msgMaxSize,
+ { "msgMaxSize", "snmp.msgMaxSize",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "INTEGER_484_2147483647", HFILL }},
+ { &hf_snmp_msgFlags,
+ { "msgFlags", "snmp.msgFlags",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ NULL, HFILL }},
+ { &hf_snmp_msgSecurityModel,
+ { "msgSecurityModel", "snmp.msgSecurityModel",
+ FT_UINT32, BASE_DEC, VALS(sec_models), 0,
+ NULL, HFILL }},
+ { &hf_snmp_plaintext,
+ { "plaintext", "snmp.plaintext_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "ScopedPDU", HFILL }},
+ { &hf_snmp_encryptedPDU,
+ { "encryptedPDU", "snmp.encryptedPDU",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ NULL, HFILL }},
+ { &hf_snmp_contextEngineID,
+ { "contextEngineID", "snmp.contextEngineID",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ "SnmpEngineID", HFILL }},
+ { &hf_snmp_contextName,
+ { "contextName", "snmp.contextName",
+ FT_STRING, BASE_NONE, NULL, 0,
+ "OCTET_STRING", HFILL }},
+ { &hf_snmp_get_request,
+ { "get-request", "snmp.get_request_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "GetRequest_PDU", HFILL }},
+ { &hf_snmp_get_next_request,
+ { "get-next-request", "snmp.get_next_request_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "GetNextRequest_PDU", HFILL }},
+ { &hf_snmp_get_response,
+ { "get-response", "snmp.get_response_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "GetResponse_PDU", HFILL }},
+ { &hf_snmp_set_request,
+ { "set-request", "snmp.set_request_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "SetRequest_PDU", HFILL }},
+ { &hf_snmp_trap,
+ { "trap", "snmp.trap_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "Trap_PDU", HFILL }},
+ { &hf_snmp_getBulkRequest,
+ { "getBulkRequest", "snmp.getBulkRequest_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "GetBulkRequest_PDU", HFILL }},
+ { &hf_snmp_informRequest,
+ { "informRequest", "snmp.informRequest_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "InformRequest_PDU", HFILL }},
+ { &hf_snmp_snmpV2_trap,
+ { "snmpV2-trap", "snmp.snmpV2_trap_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "SNMPv2_Trap_PDU", HFILL }},
+ { &hf_snmp_report,
+ { "report", "snmp.report_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "Report_PDU", HFILL }},
+ { &hf_snmp_request_id,
+ { "request-id", "snmp.request_id",
+ FT_INT32, BASE_DEC, NULL, 0,
+ "T_request_id", HFILL }},
+ { &hf_snmp_error_status,
+ { "error-status", "snmp.error_status",
+ FT_INT32, BASE_DEC, VALS(snmp_T_error_status_vals), 0,
+ NULL, HFILL }},
+ { &hf_snmp_error_index,
+ { "error-index", "snmp.error_index",
+ FT_INT32, BASE_DEC, NULL, 0,
+ "INTEGER", HFILL }},
+ { &hf_snmp_variable_bindings,
+ { "variable-bindings", "snmp.variable_bindings",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "VarBindList", HFILL }},
+ { &hf_snmp_bulkPDU_request_id,
+ { "request-id", "snmp.request_id",
+ FT_INT32, BASE_DEC, NULL, 0,
+ "Integer32", HFILL }},
+ { &hf_snmp_non_repeaters,
+ { "non-repeaters", "snmp.non_repeaters",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "INTEGER_0_2147483647", HFILL }},
+ { &hf_snmp_max_repetitions,
+ { "max-repetitions", "snmp.max_repetitions",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "INTEGER_0_2147483647", HFILL }},
+ { &hf_snmp_enterprise,
+ { "enterprise", "snmp.enterprise",
+ FT_OID, BASE_NONE, NULL, 0,
+ "EnterpriseOID", HFILL }},
+ { &hf_snmp_agent_addr,
+ { "agent-addr", "snmp.agent_addr",
+ FT_IPv4, BASE_NONE, NULL, 0,
+ "NetworkAddress", HFILL }},
+ { &hf_snmp_generic_trap,
+ { "generic-trap", "snmp.generic_trap",
+ FT_INT32, BASE_DEC, VALS(snmp_GenericTrap_vals), 0,
+ "GenericTrap", HFILL }},
+ { &hf_snmp_specific_trap,
+ { "specific-trap", "snmp.specific_trap",
+ FT_INT32, BASE_DEC, NULL, 0,
+ "SpecificTrap", HFILL }},
+ { &hf_snmp_time_stamp,
+ { "time-stamp", "snmp.time_stamp",
+ FT_UINT32, BASE_DEC, NULL, 0,
+ "TimeTicks", HFILL }},
+ { &hf_snmp_name,
+ { "name", "snmp.name",
+ FT_OID, BASE_NONE, NULL, 0,
+ "ObjectName", HFILL }},
+ { &hf_snmp_valueType,
+ { "valueType", "snmp.valueType_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ NULL, HFILL }},
+ { &hf_snmp_VarBindList_item,
+ { "VarBind", "snmp.VarBind_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ NULL, HFILL }},
+ { &hf_snmp_open,
+ { "open", "snmp.open",
+ FT_UINT32, BASE_DEC, VALS(snmp_OpenPDU_vals), 0,
+ "OpenPDU", HFILL }},
+ { &hf_snmp_close,
+ { "close", "snmp.close",
+ FT_INT32, BASE_DEC, VALS(snmp_ClosePDU_U_vals), 0,
+ "ClosePDU", HFILL }},
+ { &hf_snmp_registerRequest,
+ { "registerRequest", "snmp.registerRequest_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "RReqPDU", HFILL }},
+ { &hf_snmp_registerResponse,
+ { "registerResponse", "snmp.registerResponse",
+ FT_UINT32, BASE_DEC, VALS(snmp_RegisterResponse_vals), 0,
+ NULL, HFILL }},
+ { &hf_snmp_commitOrRollback,
+ { "commitOrRollback", "snmp.commitOrRollback",
+ FT_INT32, BASE_DEC, VALS(snmp_SOutPDU_U_vals), 0,
+ "SOutPDU", HFILL }},
+ { &hf_snmp_rRspPDU,
+ { "rRspPDU", "snmp.rRspPDU",
+ FT_INT32, BASE_DEC, VALS(snmp_RRspPDU_U_vals), 0,
+ NULL, HFILL }},
+ { &hf_snmp_pDUs,
+ { "pDUs", "snmp.pDUs",
+ FT_UINT32, BASE_DEC, VALS(snmp_PDUs_vals), 0,
+ NULL, HFILL }},
+ { &hf_snmp_smux_simple,
+ { "smux-simple", "snmp.smux_simple_element",
+ FT_NONE, BASE_NONE, NULL, 0,
+ "SimpleOpen", HFILL }},
+ { &hf_snmp_smux_version,
+ { "smux-version", "snmp.smux_version",
+ FT_INT32, BASE_DEC, VALS(snmp_T_smux_version_vals), 0,
+ NULL, HFILL }},
+ { &hf_snmp_identity,
+ { "identity", "snmp.identity",
+ FT_OID, BASE_NONE, NULL, 0,
+ "OBJECT_IDENTIFIER", HFILL }},
+ { &hf_snmp_description,
+ { "description", "snmp.description",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ "DisplayString", HFILL }},
+ { &hf_snmp_password,
+ { "password", "snmp.password",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ "OCTET_STRING", HFILL }},
+ { &hf_snmp_subtree,
+ { "subtree", "snmp.subtree",
+ FT_OID, BASE_NONE, NULL, 0,
+ "ObjectName", HFILL }},
+ { &hf_snmp_priority,
+ { "priority", "snmp.priority",
+ FT_INT32, BASE_DEC, NULL, 0,
+ "INTEGER_M1_2147483647", HFILL }},
+ { &hf_snmp_operation,
+ { "operation", "snmp.operation",
+ FT_INT32, BASE_DEC, VALS(snmp_T_operation_vals), 0,
+ NULL, HFILL }},
+ };
+
+ /* List of subtrees */
+ static gint *ett[] = {
+ &ett_snmp,
+ &ett_engineid,
+ &ett_msgFlags,
+ &ett_encryptedPDU,
+ &ett_decrypted,
+ &ett_authParameters,
+ &ett_internet,
+ &ett_varbind,
+ &ett_name,
+ &ett_value,
+ &ett_decoding_error,
+ &ett_snmp_Message,
+ &ett_snmp_Messagev2u,
+ &ett_snmp_T_datav2u,
+ &ett_snmp_UsmSecurityParameters,
+ &ett_snmp_SNMPv3Message,
+ &ett_snmp_HeaderData,
+ &ett_snmp_ScopedPduData,
+ &ett_snmp_ScopedPDU,
+ &ett_snmp_PDUs,
+ &ett_snmp_PDU,
+ &ett_snmp_BulkPDU,
+ &ett_snmp_Trap_PDU_U,
+ &ett_snmp_VarBind,
+ &ett_snmp_VarBindList,
+ &ett_snmp_SMUX_PDUs,
+ &ett_snmp_RegisterResponse,
+ &ett_snmp_OpenPDU,
+ &ett_snmp_SimpleOpen_U,
+ &ett_snmp_RReqPDU_U,
+ };
+ static ei_register_info ei[] = {
+ { &ei_snmp_failed_decrypted_data_pdu, { "snmp.failed_decrypted_data_pdu", PI_MALFORMED, PI_WARN, "Failed to decrypt encryptedPDU", EXPFILL }},
+ { &ei_snmp_decrypted_data_bad_formatted, { "snmp.decrypted_data_bad_formatted", PI_MALFORMED, PI_WARN, "Decrypted data not formatted as expected, wrong key?", EXPFILL }},
+ { &ei_snmp_verify_authentication_error, { "snmp.verify_authentication_error", PI_MALFORMED, PI_ERROR, "Error while verifying Message authenticity", EXPFILL }},
+ { &ei_snmp_authentication_ok, { "snmp.authentication_ok", PI_CHECKSUM, PI_CHAT, "SNMP Authentication OK", EXPFILL }},
+ { &ei_snmp_authentication_error, { "snmp.authentication_error", PI_CHECKSUM, PI_WARN, "SNMP Authentication Error", EXPFILL }},
+ { &ei_snmp_varbind_not_uni_class_seq, { "snmp.varbind.not_uni_class_seq", PI_MALFORMED, PI_WARN, "VarBind is not an universal class sequence", EXPFILL }},
+ { &ei_snmp_varbind_has_indicator, { "snmp.varbind.has_indicator", PI_MALFORMED, PI_WARN, "VarBind has indicator set", EXPFILL }},
+ { &ei_snmp_objectname_not_oid, { "snmp.objectname_not_oid", PI_MALFORMED, PI_WARN, "ObjectName not an OID", EXPFILL }},
+ { &ei_snmp_objectname_has_indicator, { "snmp.objectname_has_indicator", PI_MALFORMED, PI_WARN, "ObjectName has indicator set", EXPFILL }},
+ { &ei_snmp_value_not_primitive_encoding, { "snmp.value_not_primitive_encoding", PI_MALFORMED, PI_WARN, "value not in primitive encoding", EXPFILL }},
+ { &ei_snmp_invalid_oid, { "snmp.invalid_oid", PI_MALFORMED, PI_WARN, "invalid oid", EXPFILL }},
+ { &ei_snmp_varbind_wrong_tag, { "snmp.varbind.wrong_tag", PI_MALFORMED, PI_WARN, "Wrong tag for SNMP VarBind error value", EXPFILL }},
+ { &ei_snmp_varbind_response, { "snmp.varbind.response", PI_RESPONSE_CODE, PI_NOTE, "Response", EXPFILL }},
+ { &ei_snmp_no_instance_subid, { "snmp.no_instance_subid", PI_MALFORMED, PI_WARN, "No instance sub-id in scalar value", EXPFILL }},
+ { &ei_snmp_wrong_num_of_subids, { "snmp.wrong_num_of_subids", PI_MALFORMED, PI_WARN, "Wrong number of instance sub-ids in scalar value", EXPFILL }},
+ { &ei_snmp_index_suboid_too_short, { "snmp.index_suboid_too_short", PI_MALFORMED, PI_WARN, "index sub-oid shorter than expected", EXPFILL }},
+ { &ei_snmp_unimplemented_instance_index, { "snmp.unimplemented_instance_index", PI_UNDECODED, PI_WARN, "OID instaces not handled, if you want this implemented please contact the wireshark developers", EXPFILL }},
+ { &ei_snmp_index_suboid_len0, { "snmp.ndex_suboid_len0", PI_MALFORMED, PI_WARN, "an index sub-oid OID cannot be 0 bytes long!", EXPFILL }},
+ { &ei_snmp_index_suboid_too_long, { "snmp.index_suboid_too_long", PI_MALFORMED, PI_WARN, "index sub-oid should not be longer than remaining oid size", EXPFILL }},
+ { &ei_snmp_index_string_too_long, { "snmp.index_string_too_long", PI_MALFORMED, PI_WARN, "index string should not be longer than remaining oid size", EXPFILL }},
+ { &ei_snmp_column_parent_not_row, { "snmp.column_parent_not_row", PI_MALFORMED, PI_ERROR, "COLUMNS's parent is not a ROW", EXPFILL }},
+ { &ei_snmp_uint_too_large, { "snmp.uint_too_large", PI_UNDECODED, PI_NOTE, "Unsigned integer value > 2^64 - 1", EXPFILL }},
+ { &ei_snmp_int_too_large, { "snmp.int_too_large", PI_UNDECODED, PI_NOTE, "Signed integer value > 2^63 - 1 or <= -2^63", EXPFILL }},
+ { &ei_snmp_integral_value0, { "snmp.integral_value0", PI_UNDECODED, PI_NOTE, "Integral value is zero-length", EXPFILL }},
+ { &ei_snmp_missing_mib, { "snmp.missing_mib", PI_UNDECODED, PI_NOTE, "Unresolved value, Missing MIB", EXPFILL }},
+ { &ei_snmp_varbind_wrong_length_value, { "snmp.varbind.wrong_length_value", PI_MALFORMED, PI_WARN, "Wrong length for SNMP VarBind/value", EXPFILL }},
+ { &ei_snmp_varbind_wrong_class_tag, { "snmp.varbind.wrong_class_tag", PI_MALFORMED, PI_WARN, "Wrong class/tag for SNMP VarBind/value", EXPFILL }},
+ { &ei_snmp_rfc1910_non_conformant, { "snmp.rfc1910_non_conformant", PI_PROTOCOL, PI_WARN, "Data not conforming to RFC1910", EXPFILL }},
+ { &ei_snmp_rfc3411_non_conformant, { "snmp.rfc3411_non_conformant", PI_PROTOCOL, PI_WARN, "Data not conforming to RFC3411", EXPFILL }},
+ { &ei_snmp_version_unknown, { "snmp.version.unknown", PI_PROTOCOL, PI_WARN, "Unknown version", EXPFILL }},
+ { &ei_snmp_trap_pdu_obsolete, { "snmp.trap_pdu_obsolete", PI_PROTOCOL, PI_WARN, "Trap-PDU is obsolete in this SNMP version", EXPFILL }},
+
+ };
+
+ expert_module_t* expert_snmp;
+ module_t *snmp_module;
+
+ static uat_field_t users_fields[] = {
+ UAT_FLD_BUFFER(snmp_users,engine_id,"Engine ID","Engine-id for this entry (empty = any)"),
+ UAT_FLD_LSTRING(snmp_users,userName,"Username","The username"),
+ UAT_FLD_VS(snmp_users,auth_model,"Authentication model",auth_types,"Algorithm to be used for authentication."),
+ UAT_FLD_LSTRING(snmp_users,authPassword,"Password","The password used for authenticating packets for this entry"),
+ UAT_FLD_VS(snmp_users,priv_proto,"Privacy protocol",priv_types,"Algorithm to be used for privacy."),
+ UAT_FLD_LSTRING(snmp_users,privPassword,"Privacy password","The password used for encrypting packets for this entry"),
+ UAT_END_FIELDS
+ };
+
+ uat_t *assocs_uat = uat_new("SNMP Users",
+ sizeof(snmp_ue_assoc_t),
+ "snmp_users",
+ TRUE,
+ &ueas,
+ &num_ueas,
+ UAT_AFFECTS_DISSECTION, /* affects dissection of packets, but not set of named fields */
+ "ChSNMPUsersSection",
+ snmp_users_copy_cb,
+ snmp_users_update_cb,
+ snmp_users_free_cb,
+ renew_ue_cache,
+ NULL,
+ users_fields);
+
+ static uat_field_t specific_traps_flds[] = {
+ UAT_FLD_CSTRING(specific_traps,enterprise,"Enterprise OID","Enterprise Object Identifier"),
+ UAT_FLD_DEC(specific_traps,trap,"Trap Id","The specific-trap value"),
+ UAT_FLD_CSTRING(specific_traps,desc,"Description","Trap type description"),
+ UAT_END_FIELDS
+ };
+
+ uat_t* specific_traps_uat = uat_new("SNMP Enterprise Specific Trap Types",
+ sizeof(snmp_st_assoc_t),
+ "snmp_specific_traps",
+ TRUE,
+ &specific_traps,
+ &num_specific_traps,
+ UAT_AFFECTS_DISSECTION, /* affects dissection of packets, but not set of named fields */
+ "ChSNMPEnterpriseSpecificTrapTypes",
+ snmp_specific_trap_copy_cb,
+ NULL,
+ snmp_specific_trap_free_cb,
+ NULL,
+ NULL,
+ specific_traps_flds);
+
+ /* Register protocol */
+ proto_snmp = proto_register_protocol(PNAME, PSNAME, PFNAME);
+ snmp_handle = register_dissector("snmp", dissect_snmp, proto_snmp);
+
+ /* Register fields and subtrees */
+ proto_register_field_array(proto_snmp, hf, array_length(hf));
+ proto_register_subtree_array(ett, array_length(ett));
+ expert_snmp = expert_register_protocol(proto_snmp);
+ expert_register_field_array(expert_snmp, ei, array_length(ei));
+
+ /* Register dissector */
+ snmp_tcp_handle = register_dissector("snmp.tcp", dissect_snmp_tcp, proto_snmp);
+
+ /* Register configuration preferences */
+ snmp_module = prefs_register_protocol(proto_snmp, process_prefs);
+ prefs_register_bool_preference(snmp_module, "display_oid",
+ "Show SNMP OID in info column",
+ "Whether the SNMP OID should be shown in the info column",
+ &display_oid);
+
+ prefs_register_obsolete_preference(snmp_module, "mib_modules");
+ prefs_register_obsolete_preference(snmp_module, "users_file");
+
+ prefs_register_bool_preference(snmp_module, "desegment",
+ "Reassemble SNMP-over-TCP messages spanning multiple TCP segments",
+ "Whether the SNMP dissector should reassemble messages spanning multiple TCP segments."
+ " To use this option, you must also enable \"Allow subdissectors to reassemble TCP streams\" in the TCP protocol settings.",
+ &snmp_desegment);
+
+ prefs_register_bool_preference(snmp_module, "var_in_tree",
+ "Display dissected variables inside SNMP tree",
+ "ON - display dissected variables inside SNMP tree, OFF - display dissected variables in root tree after SNMP",
+ &snmp_var_in_tree);
+
+ prefs_register_uat_preference(snmp_module, "users_table",
+ "Users Table",
+ "Table of engine-user associations used for authentication and decryption",
+ assocs_uat);
+
+ prefs_register_uat_preference(snmp_module, "specific_traps_table",
+ "Enterprise Specific Trap Types",
+ "Table of enterprise specific-trap type descriptions",
+ specific_traps_uat);
+
+#ifdef HAVE_LIBSMI
+ prefs_register_static_text_preference(snmp_module, "info_mibs",
+ "MIB settings can be changed in the Name Resolution preferences",
+ "MIB settings can be changed in the Name Resolution preferences");
+#endif
+
+ value_sub_dissectors_table = register_dissector_table("snmp.variable_oid","SNMP Variable OID", proto_snmp, FT_STRING, STRING_CASE_SENSITIVE);
+
+ register_init_routine(init_ue_cache);
+ register_cleanup_routine(cleanup_ue_cache);
+
+ register_ber_syntax_dissector("SNMP", proto_snmp, dissect_snmp_tcp);
+
+ snmp_tap=register_tap("snmp");
+
+ register_srt_table(proto_snmp, NULL, 1, snmpstat_packet, snmpstat_init, NULL);
+}
+
+
+/*--- proto_reg_handoff_snmp ---------------------------------------*/
+void proto_reg_handoff_snmp(void) {
+
+ dissector_add_uint_with_preference("udp.port", UDP_PORT_SNMP, snmp_handle);
+ dissector_add_uint("ethertype", ETHERTYPE_SNMP, snmp_handle);
+ dissector_add_uint("ipx.socket", IPX_SOCKET_SNMP_AGENT, snmp_handle);
+ dissector_add_uint("ipx.socket", IPX_SOCKET_SNMP_SINK, snmp_handle);
+ dissector_add_uint("hpext.dxsap", HPEXT_SNMP, snmp_handle);
+
+ dissector_add_uint_with_preference("tcp.port", TCP_PORT_SNMP, snmp_tcp_handle);
+ /* Since "regular" SNMP port and "trap" SNMP port use the same handler,
+ the "trap" port doesn't really need a separate preference. Just register
+ normally */
+ dissector_add_uint("tcp.port", TCP_PORT_SNMP_TRAP, snmp_tcp_handle);
+ dissector_add_uint("udp.port", UDP_PORT_SNMP_TRAP, snmp_handle);
+ dissector_add_uint("udp.port", UDP_PORT_SNMP_PATROL, snmp_handle);
+
+ data_handle = find_dissector("data");
+
+ /* SNMPv2-MIB sysDescr "1.3.6.1.2.1.1.1.0" */
+ dissector_add_string("snmp.variable_oid", "1.3.6.1.2.1.1.1.0",
+ create_dissector_handle(dissect_snmp_variable_string, proto_snmp));
+ /* SNMPv2-MIB::sysName.0 (1.3.6.1.2.1.1.5.0) */
+ dissector_add_string("snmp.variable_oid", "1.3.6.1.2.1.1.5.0",
+ create_dissector_handle(dissect_snmp_variable_string, proto_snmp));
+
+ /*
+ * Process preference settings.
+ *
+ * We can't do this in the register routine, as preferences aren't
+ * read until all dissector register routines have been called (so
+ * that all dissector preferences have been registered).
+ */
+ process_prefs();
+
+}
+
+void
+proto_register_smux(void)
+{
+ static gint *ett[] = {
+ &ett_smux,
+ };
+
+ proto_smux = proto_register_protocol("SNMP Multiplex Protocol",
+ "SMUX", "smux");
+
+ proto_register_subtree_array(ett, array_length(ett));
+
+ smux_handle = register_dissector("smux", dissect_smux, proto_smux);
+}
+
+void
+proto_reg_handoff_smux(void)
+{
+ dissector_add_uint_with_preference("tcp.port", TCP_PORT_SMUX, smux_handle);
+}
+
+/*
+ * Editor modelines - https://www.wireshark.org/tools/modelines.html
+ *
+ * Local variables:
+ * c-basic-offset: 8
+ * tab-width: 8
+ * indent-tabs-mode: t
+ * End:
+ *
+ * vi: set shiftwidth=8 tabstop=8 noexpandtab:
+ * :indentSize=8:tabSize=8:noTabs=false:
+ */
generated by cgit v1.2.3 (git 2.39.1) at 2024-10-18 10:19:49 +0000