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|
/* Do not modify this file. Changes will be overwritten. */
/* Generated automatically by the ASN.1 to Wireshark dissector compiler */
/* packet-snmp.c */
/* ../../tools/asn2wrs.py -b -p snmp -c ./snmp.cnf -s ./packet-snmp-template -D . -O ../../epan/dissectors snmp.asn */
/* Input file: packet-snmp-template.c */
#line 1 "../../asn1/snmp/packet-snmp-template.c"
/* 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>
*
* $Id$
*
* 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
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#define D(args) do {printf args; fflush(stdout); } while(0)
#include "config.h"
#include <string.h>
#include <ctype.h>
#include <glib.h>
#include <epan/packet.h>
#include <epan/strutil.h>
#include <epan/conversation.h>
#include <epan/etypes.h>
#include <epan/prefs.h>
#include <epan/sminmpec.h>
#include <epan/emem.h>
#include <epan/next_tvb.h>
#include <epan/uat.h>
#include <epan/asn1.h>
#include "packet-ipx.h"
#include "packet-hpext.h"
#include "packet-ber.h"
#include "packet-snmp.h"
#include <epan/crypt/sha1.h>
#include <epan/crypt/md5.h>
#include <epan/expert.h>
#include <epan/report_err.h>
#include <epan/oids.h>
#ifdef HAVE_LIBGCRYPT
#include <wsutil/wsgcrypt.h>
#endif
/* Take a pointer that may be null and return a pointer that's not null
by turning null pointers into pointers to the above null string,
and, if the argument pointer wasn't null, make sure we handle
non-printable characters in the string by escaping them. */
#define SAFE_STRING(s, l) (((s) != NULL) ? format_text((s), (l)) : "")
#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
/* Initialize the protocol and registered fields */
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 gboolean snmp_usm_auth_md5(snmp_usm_params_t* p, guint8**, guint*, gchar const**);
static gboolean snmp_usm_auth_sha1(snmp_usm_params_t* p, guint8**, guint*, gchar const**);
static tvbuff_t* snmp_usm_priv_des(snmp_usm_params_t*, tvbuff_t*, gchar const**);
static tvbuff_t* snmp_usm_priv_aes128(snmp_usm_params_t*, tvbuff_t*, gchar const**);
static tvbuff_t* snmp_usm_priv_aes192(snmp_usm_params_t*, tvbuff_t*, gchar const**);
static tvbuff_t* snmp_usm_priv_aes256(snmp_usm_params_t*, tvbuff_t*, gchar const**);
static void snmp_usm_password_to_key_md5(const guint8 *password, guint passwordlen, const guint8 *engineID, guint engineLength, guint8 *key);
static void snmp_usm_password_to_key_sha1(const guint8 *password, guint passwordlen, const guint8 *engineID, guint engineLength, guint8 *key);
static snmp_usm_auth_model_t model_md5 = {snmp_usm_password_to_key_md5, snmp_usm_auth_md5, 16};
static snmp_usm_auth_model_t model_sha1 = {snmp_usm_password_to_key_sha1, snmp_usm_auth_sha1, 20};
static const value_string auth_types[] = {
{0,"MD5"},
{1,"SHA1"},
{0,NULL}
};
static snmp_usm_auth_model_t* auth_models[] = {&model_md5,&model_sha1};
#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;
/****/
/* Variabled used for handling enterprise spesific 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 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 data_handle;
static next_tvb_list_t var_list;
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;
/*--- Included file: packet-snmp-hf.c ---*/
#line 1 "../../asn1/snmp/packet-snmp-hf.c"
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; /* INTEGER */
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; /* NULL */
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 */
/*--- End of included file: packet-snmp-hf.c ---*/
#line 237 "../../asn1/snmp/packet-snmp-template.c"
static int hf_smux_version = -1;
static int hf_smux_pdutype = -1;
/* 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;
/*--- Included file: packet-snmp-ett.c ---*/
#line 1 "../../asn1/snmp/packet-snmp-ett.c"
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;
/*--- End of included file: packet-snmp-ett.c ---*/
#line 256 "../../asn1/snmp/packet-snmp-template.c"
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 }
};
/* 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 }
};
#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;
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;
}
/*
* 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
}
*/
extern int
dissect_snmp_VarBind(gboolean 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;
gboolean pc;
gint32 tag;
gboolean 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;
gboolean 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 = get_ber_identifier(tvb, offset, &ber_class, &pc, &tag);
offset = get_ber_length(tvb, offset, &seq_len, &ind);
seq_len += offset - seq_offset;
if (!pc && ber_class==BER_CLASS_UNI && tag==BER_UNI_TAG_SEQUENCE) {
proto_item* pi = proto_tree_add_text(tree, tvb, seq_offset, seq_len,"VarBind must be an universal class sequence");
pt = proto_item_add_subtree(pi,ett_decoding_error);
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "VarBind is not an universal class sequence");
return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
}
if (ind) {
proto_item* pi = proto_tree_add_text(tree, tvb, seq_offset, seq_len,"Indicator must be clear in VarBind");
pt = proto_item_add_subtree(pi,ett_decoding_error);
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "VarBind has indicator set");
return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
}
/* then we have the ObjectName's header */
offset = get_ber_identifier(tvb, offset, &ber_class, &pc, &tag);
name_offset = offset = get_ber_length(tvb, offset, &name_len, &ind);
if (! ( !pc && ber_class==BER_CLASS_UNI && tag==BER_UNI_TAG_OID) ) {
proto_item* pi = proto_tree_add_text(tree, tvb, seq_offset, seq_len,"ObjectName must be an OID in primitive encoding");
pt = proto_item_add_subtree(pi,ett_decoding_error);
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "ObjectName not an OID");
return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
}
if (ind) {
proto_item* pi = proto_tree_add_text(tree, tvb, seq_offset, seq_len,"Indicator must be clear in ObjectName");
pt = proto_item_add_subtree(pi,ett_decoding_error);
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "ObjectName has indicator set");
return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
}
offset += name_len;
value_start = offset;
/* then we have the value's header */
offset = get_ber_identifier(tvb, offset, &ber_class, &pc, &tag);
value_offset = get_ber_length(tvb, offset, &value_len, &ind);
if (! (!pc) ) {
proto_item* pi = proto_tree_add_text(tree, tvb, seq_offset, seq_len,"the value must be in primitive encoding");
pt = proto_item_add_subtree(pi,ett_decoding_error);
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "value not in primitive encoding");
return dissect_unknown_ber(actx->pinfo, tvb, seq_offset, pt);
}
/* Now, we know where everithing is */
/* we add the varbind tree root with a dummy label we'll fill later on */
pi_varbind = proto_tree_add_text(tree,tvb,seq_offset,seq_len,"VarBind");
pt_varbind = proto_item_add_subtree(pi_varbind,ett_varbind);
*label = '\0';
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);
/* fetch ObjectName and its relative oid_info */
oid_bytes = (guint8*)ep_tvb_memdup(tvb, name_offset, name_len);
oid_info = oid_get_from_encoded(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(oid_bytes, name_len);
pi = proto_tree_add_text(pt_name,tvb, 0, 0, "invalid oid: %s", repr);
pt = proto_item_add_subtree(pi, ett_decoding_error);
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "invalid oid: %s", repr);
return dissect_unknown_ber(actx->pinfo, tvb, name_offset, pt);
}
if (oid_matched+oid_left) {
oid_string = oid_subid2string(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: {
pi = proto_tree_add_text(pt_varbind,tvb,0,0,"Wrong tag for Error Value: expected 0, 1, or 2 but got: %d",tag);
pt = proto_item_add_subtree(pi,ett_decoding_error);
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "Wrong tag for SNMP VarBind error value");
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, PI_RESPONSE_CODE, PI_NOTE, "%s",note);
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_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"A scalar should have one instance sub-id this one has none");
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "No instance sub-id in scalar value");
oid_info_is_ok = FALSE;
goto indexing_done;
}
} else {
proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"A scalar should have only one instance sub-id this has: %d",oid_left);
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "Wrong number of instance sub-ids in scalar value");
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_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"index sub-oid shorter than expected");
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "index sub-oid shorter than expected");
oid_info_is_ok = FALSE;
goto indexing_done;
}
switch(k->key_type) {
case OID_KEY_TYPE_WRONG: {
proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"OID instaces not handled, if you want this implemented please contact the wireshark developers");
expert_add_info_format(actx->pinfo, pi, PI_UNDECODED, PI_WARN, "Unimplemented instance index");
oid_info_is_ok = FALSE;
goto indexing_done;
}
case OID_KEY_TYPE_INTEGER: {
if (IS_FT_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_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"an index sub-oid OID cannot be 0 bytes long!");
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "index sub-oid OID with len=0");
oid_info_is_ok = FALSE;
goto indexing_done;
}
if( key_len < suboid_len ) {
proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"index sub-oid should not be longer than remaining oid size");
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "index sub-oid longer than remaining oid size");
oid_info_is_ok = FALSE;
goto indexing_done;
}
suboid_buf_len = oid_subid2encoded(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_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"index string should not be longer than remaining oid size");
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "index string longer than remaining oid size");
oid_info_is_ok = FALSE;
goto indexing_done;
}
buf = (guint8*)ep_alloc(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_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"We do not know how to handle this OID, if you want this implemented please contact the wireshark developers");
expert_add_info_format(actx->pinfo, pi, PI_UNDECODED, PI_WARN, "Unimplemented instance index");
oid_info_is_ok = FALSE;
goto indexing_done;
}
} else {
proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"The COLUMS's parent is not a ROW. This is a BUG! please contact the wireshark developers.");
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_ERROR, "COLUMS's parent is not a ROW");
oid_info_is_ok = FALSE;
goto indexing_done;
}
default: {
/* proto_item* pi = proto_tree_add_text(pt_name,tvb,0,0,"This kind OID should have no value");
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "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)
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++;
}
}
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):
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. */
pi_value = proto_tree_add_text(pt_varbind,tvb,value_offset,value_len,"Integral value too large");
expert_add_info_format(actx->pinfo, pi_value, PI_UNDECODED, PI_NOTE, "Unsigned integer value > 2^64 - 1");
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.
*/
pi_value = proto_tree_add_text(pt_varbind,tvb,value_offset,value_len,"Integral value too large or too small");
expert_add_info_format(actx->pinfo, pi_value, PI_UNDECODED, PI_NOTE, "Signed integer value > 2^63 - 1 or <= -2^63");
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) {
pi_value = proto_tree_add_text(pt_varbind,tvb,value_offset,value_len,"Integral value is zero-length");
expert_add_info_format(actx->pinfo, pi_value, PI_UNDECODED, PI_NOTE, "Integral value is zero-length");
goto already_added;
}
}
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_format(actx->pinfo, pi_value, PI_UNDECODED, PI_NOTE, "Unresolved value, Missing MIB");
}
already_added:
oid_info_is_ok = FALSE;
}
pt_value = proto_item_add_subtree(pi_value,ett_value);
if (value_len > 0 && oid_string) {
tvbuff_t* sub_tvb = tvb_new_subset(tvb, value_offset, value_len, 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 = ep_strdup_printf("%s.%s (%s)", oid_info->name,
oid_subid2string(&(subids[oid_matched]),oid_left),
oid_subid2string(subids,oid_matched+oid_left));
info_oid = ep_strdup_printf("%s.%s", oid_info->name,
oid_subid2string(&(subids[oid_matched]),oid_left));
} else {
repr = ep_strdup_printf("%s (%s)", oid_info->name,
oid_subid2string(subids,oid_matched));
info_oid = oid_info->name;
}
} else if (oid_string) {
repr = ep_strdup(oid_string);
info_oid = oid_string;
} else {
repr = ep_strdup("[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_tree* p_tree = proto_item_add_subtree(pi_value,ett_decoding_error);
proto_item* pi = proto_tree_add_text(p_tree,tvb,0,0,"Wrong value length: %u expecting: %u <= len <= %u",
value_len, min_len, max_len == -1 ? 0xFFFFFF : max_len);
pt = proto_item_add_subtree(pi,ett_decoding_error);
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "Wrong length for SNMP VarBind/value");
return dissect_unknown_ber(actx->pinfo, tvb, value_start, pt);
}
case BER_WRONG_TAG: {
proto_tree* p_tree = proto_item_add_subtree(pi_value,ett_decoding_error);
proto_item* pi = proto_tree_add_text(p_tree,tvb,0,0,"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);
pt = proto_item_add_subtree(pi,ett_decoding_error);
expert_add_info_format(actx->pinfo, pi, PI_MALFORMED, PI_WARN, "Wrong class/tag for SNMP VarBind/value");
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, tvbuff_t *tvb, int offset, int len)
{
proto_item *item = NULL;
guint8 conformance, format;
guint32 enterpriseid, 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_text(tree, tvb, offset, 8, "AgentID Trailer: 0x%s",
tvb_bytes_to_str(tvb, offset, 8));
offset+=8;
len_remain-=8;
} else {
proto_tree_add_text(tree, tvb, offset, len_remain, "<Data not conforming to RFC1910>");
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(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|ENC_NA);
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 epoch seconds */
if (len_remain==8) {
proto_tree_add_item(tree, hf_snmp_engineid_data, tvb, offset, 4, ENC_NA);
seconds = tvb_get_letohl(tvb, offset+4);
ts.secs = seconds;
ts.nsecs = 0;
proto_tree_add_time_format_value(tree, hf_snmp_engineid_time, tvb, offset+4, 4,
&ts, "%s",
abs_time_secs_to_str(seconds, ABSOLUTE_TIME_LOCAL, TRUE));
offset+=8;
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_text(tree, tvb, offset, len_remain, "<Data not conforming to RFC3411>");
offset+=len_remain;
}
return offset;
}
static void set_ue_keys(snmp_ue_assoc_t* n ) {
guint key_size = n->user.authModel->key_size;
n->user.authKey.data = (guint8 *)se_alloc(key_size);
n->user.authKey.len = key_size;
n->user.authModel->pass2key(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 *)se_alloc(key_len);
n->user.privKey.len = need_key_len;
n->user.authModel->pass2key(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) {
n->user.authModel->pass2key(
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 *)se_alloc(key_size);
n->user.privKey.len = key_size;
n->user.authModel->pass2key(n->user.privPassword.data,
n->user.privPassword.len,
n->engine.data,
n->engine.len,
n->user.privKey.data);
}
}
static snmp_ue_assoc_t*
ue_se_dup(snmp_ue_assoc_t* o)
{
snmp_ue_assoc_t* d = (snmp_ue_assoc_t*)se_memdup(o,sizeof(snmp_ue_assoc_t));
d->user.authModel = o->user.authModel;
d->user.privProtocol = o->user.privProtocol;
d->user.userName.data = (guint8 *)se_memdup(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 *)se_memdup(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 *)se_memdup(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 *)se_memdup(o->engine.data,o->engine.len);
set_ue_keys(d);
}
return d;
}
#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
renew_ue_cache(void)
{
localized_ues = NULL;
unlocalized_ues = NULL;
if (num_ueas) {
guint i;
for(i = 0; i < num_ueas; i++) {
snmp_ue_assoc_t* a = ue_se_dup(&(ueas[i]));
if (a->engine.len) {
CACHE_INSERT(localized_ues,a);
} else {
CACHE_INSERT(unlocalized_ues,a);
}
}
}
}
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*)se_memdup(o,sizeof(snmp_ue_assoc_t));
n->engine.data = (guint8*)se_memdup(engine,engine_len);
n->engine.len = engine_len;
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)
{
static snmp_ue_assoc_t* a;
guint given_username_len;
guint8* given_username;
guint given_engine_len;
guint8* given_engine;
if ( ! (localized_ues || unlocalized_ues ) ) return NULL;
if (! ( user_tvb && engine_tvb ) ) return NULL;
given_username_len = tvb_length(user_tvb);
given_engine_len = tvb_length(engine_tvb);
if (! ( given_engine_len && given_username_len ) ) return NULL;
given_username = (guint8*)ep_tvb_memdup(user_tvb,0,-1);
given_engine = (guint8*)ep_tvb_memdup(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 gboolean
snmp_usm_auth_md5(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_length_remaining(p->auth_tvb,0);
if (auth_len != 12) {
*error = "Authenticator length wrong";
return FALSE;
}
msg_len = tvb_length_remaining(p->msg_tvb,0);
if (msg_len <= 0) {
*error = "Not enough data remaining";
return FALSE;
}
msg = (guint8*)ep_tvb_memdup(p->msg_tvb,0,msg_len);
auth = (guint8*)ep_tvb_memdup(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*)ep_alloc(16);
md5_hmac(msg, msg_len, key, key_len, calc_auth);
if (calc_auth_p) *calc_auth_p = calc_auth;
if (calc_auth_len_p) *calc_auth_len_p = 12;
return ( memcmp(auth,calc_auth,12) != 0 ) ? FALSE : TRUE;
}
static gboolean
snmp_usm_auth_sha1(snmp_usm_params_t* p _U_, guint8** calc_auth_p, guint* calc_auth_len_p, gchar const** error _U_)
{
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_length_remaining(p->auth_tvb,0);
if (auth_len != 12) {
*error = "Authenticator length wrong";
return FALSE;
}
msg_len = tvb_length_remaining(p->msg_tvb,0);
if (msg_len <= 0) {
*error = "Not enough data remaining";
return FALSE;
}
msg = (guint8*)ep_tvb_memdup(p->msg_tvb,0,msg_len);
auth = (guint8*)ep_tvb_memdup(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*)ep_alloc(20);
sha1_hmac(key, key_len, msg, msg_len, calc_auth);
if (calc_auth_p) *calc_auth_p = calc_auth;
if (calc_auth_len_p) *calc_auth_len_p = 12;
return ( memcmp(auth,calc_auth,12) != 0 ) ? FALSE : TRUE;
}
static tvbuff_t*
snmp_usm_priv_des(snmp_usm_params_t* p _U_, tvbuff_t* encryptedData _U_, gchar const** error _U_)
{
#ifdef HAVE_LIBGCRYPT
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_length_remaining(p->priv_tvb,0);
if (salt_len != 8) {
*error = "decryptionError: msgPrivacyParameters length != 8";
return NULL;
}
salt = (guint8*)ep_tvb_memdup(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_length_remaining(encryptedData,0);
if ((cryptgrm_len <= 0) || (cryptgrm_len % 8)) {
*error = "decryptionError: the length of the encrypted data is not a mutiple of 8 octets";
return NULL;
}
cryptgrm = (guint8*)ep_tvb_memdup(encryptedData,0,-1);
cleartext = (guint8*)ep_alloc(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 *)gpg_strerror(err);
if (hd) gcry_cipher_close(hd);
return NULL;
#else
*error = "libgcrypt not present, cannot decrypt";
return NULL;
#endif
}
#ifdef HAVE_LIBGCRYPT
static tvbuff_t*
snmp_usm_priv_aes_common(snmp_usm_params_t* p, tvbuff_t* encryptedData, 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_length_remaining(p->priv_tvb,0);
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->time & 0xff000000) >> 24;
iv[5] = (p->time & 0x00ff0000) >> 16;
iv[6] = (p->time & 0x0000ff00) >> 8;
iv[7] = (p->time & 0x000000ff);
tvb_memcpy(p->priv_tvb,&(iv[8]),0,8);
cryptgrm_len = tvb_length_remaining(encryptedData,0);
if (cryptgrm_len <= 0) {
*error = "Not enough data remaining";
return NULL;
}
cryptgrm = (guint8*)ep_tvb_memdup(encryptedData,0,-1);
cleartext = (guint8*)ep_alloc(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 *)gpg_strerror(err);
if (hd) gcry_cipher_close(hd);
return NULL;
}
#endif
static tvbuff_t*
snmp_usm_priv_aes128(snmp_usm_params_t* p _U_, tvbuff_t* encryptedData _U_, gchar const** error)
{
#ifdef HAVE_LIBGCRYPT
return snmp_usm_priv_aes_common(p, encryptedData, error, GCRY_CIPHER_AES);
#else
*error = "libgcrypt not present, cannot decrypt";
return NULL;
#endif
}
static tvbuff_t*
snmp_usm_priv_aes192(snmp_usm_params_t* p _U_, tvbuff_t* encryptedData _U_, gchar const** error)
{
#ifdef HAVE_LIBGCRYPT
return snmp_usm_priv_aes_common(p, encryptedData, error, GCRY_CIPHER_AES192);
#else
*error = "libgcrypt not present, cannot decrypt";
return NULL;
#endif
}
static tvbuff_t*
snmp_usm_priv_aes256(snmp_usm_params_t* p _U_, tvbuff_t* encryptedData _U_, gchar const** error)
{
#ifdef HAVE_LIBGCRYPT
return snmp_usm_priv_aes_common(p, encryptedData, error, GCRY_CIPHER_AES256);
#else
*error = "libgcrypt not present, cannot decrypt";
return NULL;
#endif
}
static gboolean
check_ScopedPdu(tvbuff_t* tvb)
{
int offset;
gint8 ber_class;
gboolean 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;
}
/*--- Included file: packet-snmp-fn.c ---*/
#line 1 "../../asn1/snmp/packet-snmp-fn.c"
static int
dissect_snmp_EnterpriseOID(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
#line 64 "../../asn1/snmp/snmp.cnf"
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(enterprise_oid);
if (name) {
col_append_fstr (actx->pinfo->cinfo, COL_INFO, " %s", name);
}
}
return offset;
}
static int
dissect_snmp_OCTET_STRING_SIZE_4(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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_ObjectName(gboolean 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(gboolean 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_Community(gboolean 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_INTEGER(gboolean 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_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(gboolean 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_NULL(gboolean 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_null(implicit_tag, actx, tree, tvb, offset, hf_index);
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(gboolean 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_INTEGER },
{ &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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
#line 48 "../../asn1/snmp/snmp.cnf"
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(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
#line 40 "../../asn1/snmp/snmp.cnf"
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);
return offset;
}
static int
dissect_snmp_Trap_PDU(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
#line 28 "../../asn1/snmp/snmp.cnf"
gint pdu_type=-1;
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);
}
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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
#line 99 "../../asn1/snmp/snmp.cnf"
tvbuff_t* param_tvb = NULL;
offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
¶m_tvb);
if (param_tvb) {
proto_tree* engine_tree = proto_item_add_subtree(actx->created_item,ett_engineid);
dissect_snmp_engineid(engine_tree, param_tvb, 0, tvb_length_remaining(param_tvb,0));
}
return offset;
}
static int
dissect_snmp_T_msgAuthoritativeEngineID(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
#line 90 "../../asn1/snmp/snmp.cnf"
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, usm_p.engine_tvb, 0, tvb_length_remaining(usm_p.engine_tvb,0));
}
return offset;
}
static int
dissect_snmp_T_msgAuthoritativeEngineBoots(gboolean 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(gboolean 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.time);
return offset;
}
static int
dissect_snmp_T_msgUserName(gboolean 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(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
#line 112 "../../asn1/snmp/snmp.cnf"
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(gboolean 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(gboolean 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(gboolean 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(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
#line 227 "../../asn1/snmp/snmp.cnf"
tvbuff_t *parameter_tvb = NULL;
offset = dissect_ber_octet_string(implicit_tag, actx, tree, tvb, offset, hf_index,
¶meter_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(gboolean 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(gboolean 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(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
#line 170 "../../asn1/snmp/snmp.cnf"
switch(MsgSecurityModel){
case SNMP_SEC_USM: /* 3 */
offset = dissect_snmp_UsmSecurityParameters(FALSE, tvb, offset+2, actx, tree, -1);
usm_p.user_assoc = get_user_assoc(usm_p.engine_tvb, usm_p.user_tvb);
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(gboolean 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(gboolean implicit_tag _U_, tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) {
#line 121 "../../asn1/snmp/snmp.cnf"
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, &error );
if (! cleartext_tvb) {
proto_item* cause = proto_tree_add_text(encryptedpdu_tree, crypt_tvb, 0, -1,
"Failed to decrypt encryptedPDU: %s", error);
expert_add_info_format(actx->pinfo, cause, PI_MALFORMED, PI_WARN,
"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_item* cause = proto_tree_add_text(encryptedpdu_tree, cleartext_tvb, 0, -1,
"Decrypted data not formatted as expected, wrong key?");
expert_add_info_format(actx->pinfo, cause, PI_MALFORMED, PI_WARN,
"Decrypted data not formatted as expected");
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(gboolean 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(gboolean 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);
#line 185 "../../asn1/snmp/snmp.cnf"
if( usm_p.authenticated
&& usm_p.user_assoc
&& usm_p.user_assoc->user.authModel ) {
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;
guint calc_auth_len;
usm_p.authOK = usm_p.user_assoc->user.authModel->authenticate( &usm_p, &calc_auth, &calc_auth_len, &error );
if (error) {
authen_item = proto_tree_add_text(authen_tree,tvb,0,0,"Error while verifying Message authenticity: %s", error);
PROTO_ITEM_SET_GENERATED(authen_item);
expert_add_info_format( actx->pinfo, authen_item, PI_MALFORMED, PI_ERROR, "Error while verifying Message authenticity: %s", error );
} else {
int severity;
const gchar* msg;
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) {
msg = "SNMP Authentication OK";
severity = PI_CHAT;
} else {
const gchar* calc_auth_str = bytestring_to_str(calc_auth,calc_auth_len,' ');
proto_item_append_text(authen_item, " calculated = %s", calc_auth_str);
msg = "SNMP Authentication Error";
severity = PI_WARN;
}
expert_add_info_format( actx->pinfo, authen_item, PI_CHECKSUM, severity, "%s", msg );
}
}
return offset;
}
static const value_string snmp_T_smux_version_vals[] = {
{ 0, "version-1" },
{ 0, NULL }
};
static int
dissect_snmp_T_smux_version(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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(gboolean 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,
SMUX_PDUs_choice, hf_index, ett_snmp_SMUX_PDUs,
NULL);
return offset;
}
/*--- PDUs ---*/
static void dissect_SMUX_PDUs_PDU(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_) {
asn1_ctx_t asn1_ctx;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
dissect_snmp_SMUX_PDUs(FALSE, tvb, 0, &asn1_ctx, tree, hf_snmp_SMUX_PDUs_PDU);
}
/*--- End of included file: packet-snmp-fn.c ---*/
#line 1636 "../../asn1/snmp/packet-snmp-template.c"
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;
gboolean 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;
asn1_ctx_t asn1_ctx;
asn1_ctx_init(&asn1_ctx, ASN1_ENC_BER, TRUE, pinfo);
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.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_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, which means "I didn't dissect anything
* because I don't have enough data - we need
* to desegment".
*/
return 0;
}
}
/*
* OK, try to read the "Sequence Of" header; this gets the total
* length of the SNMP message.
*/
/* Set tree to 0 to not display internal BER fields if option used.*/
offset = dissect_ber_identifier(pinfo, 0, tvb, offset, &ber_class, &pc, &tag);
/*Get the total octet length of the SNMP data*/
offset = dissect_ber_length(pinfo, 0, 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;
}
}
next_tvb_init(&var_list);
col_set_str(pinfo->cinfo, COL_PROTOCOL,
proto_get_protocol_short_name(find_protocol_by_id(proto)));
if (tree) {
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.
*/
proto_tree_add_text(snmp_tree, tvb, offset, -1,"Unknown version");
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_)
{
conversation_t *conversation;
int offset;
gint8 tmp_class;
gboolean tmp_pc;
gint32 tmp_tag;
guint32 tmp_length;
gboolean tmp_ind;
/*
* See if this looks like SNMP or not. if not, return 0 so
* wireshark can try som 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);
/* if(tmp_length!=(guint32)tvb_reported_length_remaining(tvb, offset)) {
* Losen the heuristic a bit to handle the case where data has intentionally
* been added after the snmp PDU ( UDP case)
*/
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 first SNMP packet goes to the SNMP port; the second one
* may come from some *other* port, but goes back to the same
* IP address and port as the ones from which the first packet
* came; all subsequent packets presumably go between those two
* IP addresses and ports.
*
* 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 = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst, PT_UDP,
pinfo->srcport, 0, NO_PORT_B);
if( (conversation == NULL) || (conversation->dissector_handle!=snmp_handle) ) {
conversation = conversation_new(pinfo->fd->num, &pinfo->src, &pinfo->dst, PT_UDP,
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 void
dissect_snmp_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
int offset = 0;
guint message_len;
while (tvb_reported_length_remaining(tvb, offset) > 0) {
message_len = dissect_snmp_pdu(tvb, 0, 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;
}
}
static void
dissect_smux(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
proto_tree *smux_tree = NULL;
proto_item *item = NULL;
next_tvb_init(&var_list);
col_set_str(pinfo->cinfo, COL_PROTOCOL, "SMUX");
if (tree) {
item = proto_tree_add_item(tree, proto_smux, tvb, 0, -1, ENC_NA);
smux_tree = proto_item_add_subtree(item, ett_smux);
}
dissect_SMUX_PDUs_PDU(tvb, pinfo, smux_tree);
}
/*
MD5 Password to Key Algorithm
from RFC 3414 A.2.1
*/
static void
snmp_usm_password_to_key_md5(const guint8 *password, guint passwordlen,
const guint8 *engineID, guint engineLength,
guint8 *key)
{
md5_state_t MD;
guint8 *cp, password_buf[64];
guint32 password_index = 0;
guint32 count = 0, i;
guint8 key1[16];
md5_init(&MD); /* initialize MD5 */
/**********************************************/
/* Use while loop until we've done 1 Megabyte */
/**********************************************/
while (count < 1048576) {
cp = password_buf;
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];
}
md5_append(&MD, password_buf, 64);
count += 64;
}
md5_finish(&MD, key1); /* tell MD5 we're done */
/*****************************************************/
/* Now localize the key with the engineID and pass */
/* through MD5 to produce final key */
/* We ignore invalid engineLengths here. More strict */
/* checking is done in snmp_users_update_cb. */
/*****************************************************/
md5_init(&MD);
md5_append(&MD, key1, 16);
md5_append(&MD, engineID, engineLength);
md5_append(&MD, key1, 16);
md5_finish(&MD, key);
return;
}
/*
SHA1 Password to Key Algorithm COPIED from RFC 3414 A.2.2
*/
static void
snmp_usm_password_to_key_sha1(const guint8 *password, guint passwordlen,
const guint8 *engineID, guint engineLength,
guint8 *key)
{
sha1_context SH;
guint8 *cp, password_buf[64];
guint32 password_index = 0;
guint32 count = 0, i;
sha1_starts(&SH); /* initialize SHA */
/**********************************************/
/* Use while loop until we've done 1 Megabyte */
/**********************************************/
while (count < 1048576) {
cp = password_buf;
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];
}
sha1_update (&SH, password_buf, 64);
count += 64;
}
sha1_finish(&SH, key);
/*****************************************************/
/* Now localize the key with the engineID and pass */
/* through SHA to produce final key */
/* We ignore invalid engineLengths here. More strict */
/* checking is done in snmp_users_update_cb. */
/*****************************************************/
sha1_starts(&SH);
sha1_update(&SH, key, 20);
sha1_update(&SH, engineID, engineLength);
sha1_update(&SH, key, 20);
sha1_finish(&SH, key);
return;
}
static void
process_prefs(void)
{
}
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 = auth_models[o->auth_model];
d->priv_proto = o->priv_proto;
d->user.privProtocol = priv_protos[o->priv_proto];
d->user.userName.data = (guint8*)g_memdup(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_memdup(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_memdup(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_memdup(o->engine.data,o->engine.len);
}
d->user.authKey.data = o->user.authKey.data ? (guint8*)g_memdup(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_memdup(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 void
snmp_users_update_cb(void* p _U_, const char** err)
{
snmp_ue_assoc_t* ue = (snmp_ue_assoc_t*)p;
emem_strbuf_t* es = ep_strbuf_new("");
unsigned int i;
*err = NULL;
if (num_ueas == 0)
/* Nothing to update */
return;
if (! ue->user.userName.len)
ep_strbuf_append_printf(es,"no userName\n");
for (i=0; i<num_ueas-1; i++) {
snmp_ue_assoc_t* u = &(ueas[i]);
/* RFC 3411 section 5 */
if ((u->engine.len > 0) && (u->engine.len < 5 || u->engine.len > 32)) {
ep_strbuf_append_printf(es, "Invalid engineId length (%u). Must be between 5 and 32 (10 and 64 hex digits)\n", u->engine.len);
}
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 */
ep_strbuf_append_printf(es,"Duplicate key (userName='%s')\n",ue->user.userName.data);
}
}
if (u->engine.len == 0) {
if ( memcmp( u->user.userName.data, ue->user.userName.data, ue->user.userName.len ) == 0 ) {
ep_strbuf_append_printf(es,"Duplicate key (userName='%s' engineId=NONE)\n",ue->user.userName.data);
}
}
}
}
if (es->len) {
es = ep_strbuf_truncate(es,es->len-1);
*err = ep_strdup(es->str);
}
return;
}
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_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_DEC|BASE_EXT_STRING,
&sminmpec_values_ext, 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_NONE,
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 }},
/*--- Included file: packet-snmp-hfarr.c ---*/
#line 1 "../../asn1/snmp/packet-snmp-hfarr.c"
{ &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",
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",
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",
FT_NONE, BASE_NONE, NULL, 0,
"GetRequest_PDU", HFILL }},
{ &hf_snmp_get_next_request,
{ "get-next-request", "snmp.get_next_request",
FT_NONE, BASE_NONE, NULL, 0,
"GetNextRequest_PDU", HFILL }},
{ &hf_snmp_get_response,
{ "get-response", "snmp.get_response",
FT_NONE, BASE_NONE, NULL, 0,
"GetResponse_PDU", HFILL }},
{ &hf_snmp_set_request,
{ "set-request", "snmp.set_request",
FT_NONE, BASE_NONE, NULL, 0,
"SetRequest_PDU", HFILL }},
{ &hf_snmp_trap,
{ "trap", "snmp.trap",
FT_NONE, BASE_NONE, NULL, 0,
"Trap_PDU", HFILL }},
{ &hf_snmp_getBulkRequest,
{ "getBulkRequest", "snmp.getBulkRequest",
FT_NONE, BASE_NONE, NULL, 0,
"GetBulkRequest_PDU", HFILL }},
{ &hf_snmp_informRequest,
{ "informRequest", "snmp.informRequest",
FT_NONE, BASE_NONE, NULL, 0,
"InformRequest_PDU", HFILL }},
{ &hf_snmp_snmpV2_trap,
{ "snmpV2-trap", "snmp.snmpV2_trap",
FT_NONE, BASE_NONE, NULL, 0,
"SNMPv2_Trap_PDU", HFILL }},
{ &hf_snmp_report,
{ "report", "snmp.report",
FT_NONE, BASE_NONE, NULL, 0,
"Report_PDU", HFILL }},
{ &hf_snmp_request_id,
{ "request-id", "snmp.request_id",
FT_INT32, BASE_DEC, NULL, 0,
"INTEGER", 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",
FT_NONE, BASE_NONE, NULL, 0,
NULL, HFILL }},
{ &hf_snmp_VarBindList_item,
{ "VarBind", "snmp.VarBind",
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",
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",
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 }},
/*--- End of included file: packet-snmp-hfarr.c ---*/
#line 2286 "../../asn1/snmp/packet-snmp-template.c"
};
/* 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,
/*--- Included file: packet-snmp-ettarr.c ---*/
#line 1 "../../asn1/snmp/packet-snmp-ettarr.c"
&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,
/*--- End of included file: packet-snmp-ettarr.c ---*/
#line 2302 "../../asn1/snmp/packet-snmp-template.c"
};
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,
(void**)&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,
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,
(void**)&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,
specific_traps_flds);
/* Register protocol */
proto_snmp = proto_register_protocol(PNAME, PSNAME, PFNAME);
new_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));
/* 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\nspanning 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", FT_STRING, BASE_NONE);
register_init_routine(renew_ue_cache);
register_ber_syntax_dissector("SNMP", proto_snmp, dissect_snmp_tcp);
}
/*--- proto_reg_handoff_snmp ---------------------------------------*/
void proto_reg_handoff_snmp(void) {
dissector_handle_t snmp_tcp_handle;
snmp_handle = find_dissector("snmp");
dissector_add_uint("udp.port", UDP_PORT_SNMP, snmp_handle);
dissector_add_uint("udp.port", UDP_PORT_SNMP_TRAP, snmp_handle);
dissector_add_uint("udp.port", UDP_PORT_SNMP_PATROL, 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);
snmp_tcp_handle = create_dissector_handle(dissect_snmp_tcp, proto_snmp);
dissector_add_uint("tcp.port", TCP_PORT_SNMP, snmp_tcp_handle);
dissector_add_uint("tcp.port", TCP_PORT_SNMP_TRAP, snmp_tcp_handle);
data_handle = find_dissector("data");
/*
* 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 hf_register_info hf[] = {
{ &hf_smux_version,
{ "Version", "smux.version", FT_UINT8, BASE_DEC, NULL,
0x0, NULL, HFILL }},
{ &hf_smux_pdutype,
{ "PDU type", "smux.pdutype", FT_UINT8, BASE_DEC, VALS(smux_types),
0x0, NULL, HFILL }},
};
static gint *ett[] = {
&ett_smux,
};
proto_smux = proto_register_protocol("SNMP Multiplex Protocol",
"SMUX", "smux");
proto_register_field_array(proto_smux, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
void
proto_reg_handoff_smux(void)
{
dissector_handle_t smux_handle;
smux_handle = create_dissector_handle(dissect_smux, proto_smux);
dissector_add_uint("tcp.port", TCP_PORT_SMUX, smux_handle);
}
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