1145 lines
32 KiB
C
1145 lines
32 KiB
C
/* packet-agentx.c
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* Routines for Agent Extensibility (AgentX) Protocol disassembly
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* RFC 2257
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*
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* $Id$
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*
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* Copyright (c) 2005 by Oleg Terletsky <oleg.terletsky@comverse.com>
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@ethereal.com>
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* Copyright 1999 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "moduleinfo.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <gmodule.h>
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#include <ctype.h>
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#include <time.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/prefs.h>
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#include <epan/dissectors/packet-tcp.h>
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static guint global_agentx_tcp_port = 705;
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static guint agentx_tcp_port = 705;
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#ifndef ENABLE_STATIC
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G_MODULE_EXPORT const gchar version[] = VERSION;
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#endif
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void proto_reg_handoff_agentx(void);
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/* Define the agentx proto */
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static int proto_agentx = -1;
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static int hf_version = -1;
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static int hf_type = -1;
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static int hf_flags = -1;
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static int hf_session_id = -1;
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static int hf_trans_id = -1;
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static int hf_packet_id = -1;
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static int hf_payload_len = -1;
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static int hf_ostring_len = -1;
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static int hf_ostring = -1;
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static int hf_oid_sub = -1;
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static int hf_oid_prefix = -1;
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static int hf_oid_include = -1;
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static int hf_oid_str = -1;
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static int hf_resp_uptime = -1;
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static int hf_resp_error = -1;
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static int hf_resp_index = -1;
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static int hf_vtag = -1;
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static int hf_val32 = -1;
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static int hf_val64 = -1;
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static int hf_open_timeout = -1;
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static int hf_close_reason = -1;
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static int hf_reg_timeout = -1;
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static int hf_reg_prio = -1;
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static int hf_reg_rsid = -1;
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static int hf_reg_ubound = -1;
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static int hf_unreg_timeout = -1;
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static int hf_unreg_prio = -1;
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static int hf_unreg_rsid = -1;
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static int hf_unreg_ubound = -1;
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static int hf_gbulk_nrepeat = -1;
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static int hf_gbulk_mrepeat = -1;
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static gint ett_agentx = -1;
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static gint ett_pdu_hdr = -1;
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static gint ett_get = -1;
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static gint ett_getnext = -1;
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static gint ett_search_range = -1;
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static gint ett_obj_ident = -1;
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static gint ett_response = -1;
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static gint ett_valrep = -1;
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static gint ett_open = -1;
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static gint ett_close = -1;
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static gint ett_register = -1;
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static gint ett_unregister = -1;
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static gint ett_getbulk = -1;
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static gint ett_testset = -1;
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static gint ett_commitset = -1;
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static gint ett_undoset = -1;
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static gint ett_cleanupset = -1;
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static gint ett_notify = -1;
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static gint ett_ping = -1;
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static gint ett_idxalloc = -1;
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static gint ett_idxdalloc = -1;
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static gint ett_addcap = -1;
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static gint ett_remcap = -1;
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#define AGENTX_OPEN_PDU 1
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#define AGENTX_CLOSE_PDU 2
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#define AGENTX_REGISTER_PDU 3
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#define AGENTX_UNREGISTER_PDU 4
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#define AGENTX_GET_PDU 5
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#define AGENTX_GETNEXT_PDU 6
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#define AGENTX_GETBULK_PDU 7
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#define AGENTX_TESTSET_PDU 8
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#define AGENTX_COMMITSET_PDU 9
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#define AGENTX_UNDOSET_PDU 10
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#define AGENTX_CLEANUPSET_PDU 11
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#define AGENTX_NOTIFY_PDU 12
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#define AGENTX_PING_PDU 13
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#define AGENTX_INDEX_ALLOC_PDU 14
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#define AGENTX_INDEX_DEALLOC_PDU 15
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#define AGENTX_ADD_AGENT_CAPS_PDU 16
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#define AGENTX_REM_AGENT_CAPS_PDU 17
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#define AGENTX_RESPONSE_PDU 18
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static const value_string type_values [] = {
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{ AGENTX_OPEN_PDU, "Open-PDU" },
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{ AGENTX_CLOSE_PDU, "Close-PDU" },
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{ AGENTX_REGISTER_PDU, "Register-PDU" },
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{ AGENTX_UNREGISTER_PDU, "Unregister-PDU" },
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{ AGENTX_GET_PDU, "Get-PDU" },
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{ AGENTX_GETNEXT_PDU, "GetNext-PDU" },
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{ AGENTX_GETBULK_PDU, "GetBulk-PDU" },
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{ AGENTX_TESTSET_PDU, "TestSet-PDU" },
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{ AGENTX_COMMITSET_PDU, "CommitSet-PDU" },
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{ AGENTX_UNDOSET_PDU, "UndoSet-PDU" },
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{ AGENTX_CLEANUPSET_PDU, "CleanupSet-PDU" },
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{ AGENTX_NOTIFY_PDU, "Notify-PDU" },
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{ AGENTX_PING_PDU, "Ping-PDU" },
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{ AGENTX_INDEX_ALLOC_PDU, "IndexAllocate-PDU" },
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{ AGENTX_INDEX_DEALLOC_PDU, "IndexDeallocate-PDU" },
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{ AGENTX_ADD_AGENT_CAPS_PDU, "AddAgentCaps-PDU" },
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{ AGENTX_REM_AGENT_CAPS_PDU, "RemoveAgentCaps-PDU" },
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{ AGENTX_RESPONSE_PDU, "Response-PDU" },
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{ 0, NULL }
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};
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/* VarBind types */
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#define VB_INT 2
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#define VB_OSTR 4
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#define VB_NULL 5
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#define VB_OID 6
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#define VB_IPADDR 64
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#define VB_COUNTER32 65
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#define VB_GAUGE32 66
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#define VB_TIMETICK 67
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#define VB_OPAQUE 68
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#define VB_COUNTER64 70
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#define VB_NOSUCHOBJ 128
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#define VB_NOSUCHINST 129
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#define VB_ENDOFMIB 130
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static const value_string vtag_values [] = {
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{ VB_INT, "Integer" },
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{ VB_OSTR, "Octet String" },
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{ VB_NULL, "Null" },
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{ VB_OID, "Object Identifier" },
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{ VB_IPADDR, "IpAddress" },
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{ VB_COUNTER32, "Counter32" },
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{ VB_GAUGE32, "Gauge32" },
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{ VB_TIMETICK, "TimeTicks" },
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{ VB_OPAQUE, "Opaque" },
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{ VB_COUNTER64, "Counter64" },
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{ VB_NOSUCHOBJ, "noSuchObject" },
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{ VB_NOSUCHINST, "noSuchInstance" },
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{ VB_ENDOFMIB, "endOfMibView" },
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{ 0, NULL }
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};
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/* Close reasons */
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#define CREASON_OTHER 1
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#define CREASON_PARSE_ERROR 2
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#define CREASON_PROTOCOL_ERROR 3
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#define CREASON_TIMEOUTS 4
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#define CREASON_SHUTDOWN 5
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#define CREASON_BY_MANAGER 6
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static const value_string close_reasons[] = {
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{ CREASON_OTHER, "reasonOther" },
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{ CREASON_PARSE_ERROR, "reasonParseError" },
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{ CREASON_PROTOCOL_ERROR, "reasonProtocolError" },
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{ CREASON_TIMEOUTS, "reasonTimeouts" },
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{ CREASON_SHUTDOWN , "reasonShutdown" },
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{ CREASON_BY_MANAGER, "reasonByManager" },
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{ 0, NULL }
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};
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/* Response errors */
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#define AGENTX_NO_ERROR 0
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#define AGENTX_TOO_BIG 1
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#define AGENTX_NO_SUCH_NAME 2
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#define AGENTX_BAD_VALUE 3
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#define AGENTX_READ_ONLY 4
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#define AGENTX_GEN_ERROR 5
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#define AGENTX_NO_ACCESS 6
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#define AGENTX_WRONG_TYPE 7
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#define AGENTX_WRONG_LEN 8
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#define AGENTX_WRONG_ENCODE 9
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#define AGENTX_WRONG_VALUE 10
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#define AGENTX_NO_CREATION 11
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#define AGENTX_INCONSIST_VALUE 12
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#define AGENTX_RES_UNAVAIL 13
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#define AGENTX_COMMIT_FAILED 14
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#define AGENTX_UNDO_FAILED 15
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#define AGENTX_AUTH_ERROR 16
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#define AGENTX_NOTWRITABLE 17
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#define AGENTX_INCONSIS_NAME 18
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#define AGENTX_OPEN_FAILED 256
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#define AGENTX_NOT_OPEN 257
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#define AGENTX_IDX_WRONT_TYPE 258
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#define AGENTX_IDX_ALREAY_ALLOC 259
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#define AGENTX_IDX_NONEAVAIL 260
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#define AGENTX_IDX_NOTALLOC 261
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#define AGENTX_UNSUPP_CONTEXT 262
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#define AGENTX_DUP_REGISTR 263
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#define AGENTX_UNKNOWN_REG 264
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#define AGENTX_UNKNOWN_CAPS 265
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static const value_string resp_errors[] = {
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{ AGENTX_NO_ERROR, "noError" },
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{ AGENTX_TOO_BIG, "tooBig" },
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{ AGENTX_NO_SUCH_NAME, "noSuchName" },
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{ AGENTX_BAD_VALUE, "badValue" },
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{ AGENTX_READ_ONLY, "readOnly" },
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{ AGENTX_GEN_ERROR, "genErr" },
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{ AGENTX_NO_ACCESS, "noAccess" },
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{ AGENTX_WRONG_TYPE, "wrongType" },
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{ AGENTX_WRONG_LEN, "wrongLength" },
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{ AGENTX_WRONG_ENCODE, "wrongEncoding" },
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{ AGENTX_WRONG_VALUE, "wrongValue" },
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{ AGENTX_NO_CREATION, "noCreation" },
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{ AGENTX_INCONSIST_VALUE, "inconsistentValue" },
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{ AGENTX_RES_UNAVAIL, "resourceUnavailable" },
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{ AGENTX_COMMIT_FAILED, "commitFailed" },
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{ AGENTX_UNDO_FAILED , "undoFailed" },
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{ AGENTX_AUTH_ERROR, "authorizationError" },
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{ AGENTX_NOTWRITABLE, "notWritable" },
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{ AGENTX_INCONSIS_NAME, "inconsistentName" },
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{ AGENTX_OPEN_FAILED, "openFailed" },
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{ AGENTX_NOT_OPEN, "notOpen" },
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{ AGENTX_IDX_WRONT_TYPE, "indexWrongType" },
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{ AGENTX_IDX_ALREAY_ALLOC, "indexAlreadyAllocated" },
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{ AGENTX_IDX_NONEAVAIL, "indexNoneAvailable" },
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{ AGENTX_IDX_NOTALLOC, "indexNotAllocated" },
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{ AGENTX_UNSUPP_CONTEXT, "unsupportedContext" },
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{ AGENTX_DUP_REGISTR, "duplicateRegistration" },
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{ AGENTX_UNKNOWN_REG, "unknownRegistration" },
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{ AGENTX_UNKNOWN_CAPS, "unknownAgentCaps" },
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{ 0, NULL }
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};
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/* PDU Header flags */
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#define INSTANCE_REGISTRATION 0
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#define NEW_INDEX 0x1
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#define ANY_INDEX 0x2
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#define NON_DEFAULT_CONTEXT 0x4
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#define NETWORK_BYTE_ORDER 0x8
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#define PDU_HDR_LEN 20
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#define PADDING(x) ((((x) + 3) >> 2) << 2)
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#define NORLEL(flags,var,tvb,offset) \
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var = (flags & NETWORK_BYTE_ORDER) ? \
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tvb_get_ntohl(tvb, offset) : \
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tvb_get_letohl(tvb, offset)
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#define NORLES(flags,var,tvb,offset) \
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var = (flags & NETWORK_BYTE_ORDER) ? \
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tvb_get_ntohs(tvb, offset) : \
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tvb_get_letohs(tvb, offset)
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static int dissect_octet_string(tvbuff_t *tvb, proto_tree *tree, int offset, char flags)
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{
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guint32 n_oct, p_noct;
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char context[1024];
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NORLEL(flags, n_oct, tvb, offset);
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p_noct = PADDING(n_oct);
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if (n_oct >= 1024)
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THROW(ReportedBoundsError);
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tvb_get_nstringz(tvb, offset + 4, n_oct, context);
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context[n_oct]='\0';
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proto_tree_add_uint(tree,hf_ostring_len,tvb,offset,4,n_oct);
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proto_tree_add_string(tree, hf_ostring, tvb, offset + 4, n_oct, context);
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return p_noct + 4;
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}
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/* XXX - Is there a particular reason we're not using oid_to_str() here? */
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static int convert_oid_to_str(guint32 *oid, int len, char* str, int slen, char prefix)
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{
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int i, tlen = 0;
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if(!oid) return 0;
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if(!str) return 0;
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if(!len) return 0;
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if(!slen) return 0;
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if(slen < len) return 0;
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if(prefix) {
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tlen+= sprintf(str,".1.3.6.1.%d",prefix);
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}
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for(i=0; i < len && tlen < slen; i++) {
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tlen += sprintf(str+tlen,".%d",oid[i]);
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}
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return tlen;
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}
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static int dissect_object_id(tvbuff_t *tvb, proto_tree *tree, int offset, char flags)
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{
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guint8 n_subid;
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guint8 prefix;
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guint8 include;
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proto_item* item;
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proto_tree* subtree;
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guint32 oid[2048];
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char str_oid[2048];
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int i, slen;
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memset(oid, '\0', sizeof(oid));
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memset(str_oid, '\0', sizeof(str_oid));
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n_subid = tvb_get_guint8(tvb, offset);
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prefix = tvb_get_guint8(tvb, offset + 1);
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include = tvb_get_guint8(tvb,offset + 2);
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tvb_get_guint8(tvb, offset + 3);
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for(i=0; i<n_subid; i++) {
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NORLEL(flags, oid[i], tvb, (offset+4) + (i*4));
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}
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if(!(slen = convert_oid_to_str(&oid[0], n_subid, &str_oid[0], 2048, prefix)))
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return offset;
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if(tree) {
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item = proto_tree_add_text(tree,tvb,offset,n_subid + 4 ,
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"Object Identifier: (%s) %s",(include) ? "Start" : "End" , str_oid);
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subtree = proto_item_add_subtree(item, ett_obj_ident);
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} else return offset;
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proto_tree_add_uint(subtree, hf_oid_sub, tvb, offset, 1, n_subid);
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proto_tree_add_uint(subtree, hf_oid_prefix, tvb, offset + 1, 1, prefix);
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proto_tree_add_uint(subtree, hf_oid_include, tvb, offset + 2, 1, include);
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proto_tree_add_string(subtree,hf_oid_str, tvb, offset + 4, slen, str_oid);
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return 4 + (n_subid * 4);
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}
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static int dissect_search_range(tvbuff_t *tvb, proto_tree *tree, int offset, char flags)
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{
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offset += dissect_object_id(tvb, tree, offset, flags);
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offset += dissect_object_id(tvb, tree, offset, flags);
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return offset;
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}
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static int dissect_val64(tvbuff_t *tvb, proto_tree *tree, int offset, char flags)
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{
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gboolean little_endian = !(flags & NETWORK_BYTE_ORDER);
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proto_tree_add_item(tree, hf_val64, tvb, offset, 8, little_endian);
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return 8;
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}
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static int dissect_val32(tvbuff_t *tvb, proto_tree *tree, int offset, char flags)
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{
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gboolean little_endian = !(flags & NETWORK_BYTE_ORDER);
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proto_tree_add_item(tree, hf_val32, tvb, offset, 4, little_endian);
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return 4;
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}
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static int dissect_varbind(tvbuff_t *tvb, proto_tree *tree, int offset, int len, char flags)
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{
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guint16 vtag;
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int tlen;
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proto_item* item;
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proto_tree* subtree;
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NORLES(flags, vtag, tvb, offset);
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/* 2 reserved bytes after this */
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if(tree) {
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item = proto_tree_add_text(tree,tvb, offset, len, "Value Representation");
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subtree = proto_item_add_subtree(item, ett_valrep);
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} else return len;
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proto_tree_add_uint(subtree, hf_vtag, tvb, offset, 2, vtag);
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tlen = dissect_object_id(tvb, subtree, offset + 4, flags);
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switch(vtag)
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{
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case VB_OID:
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tlen += dissect_object_id(tvb, subtree, offset + tlen + 4, flags);
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break;
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case VB_OPAQUE:
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case VB_OSTR:
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case VB_IPADDR:
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tlen += dissect_octet_string(tvb, subtree,offset + tlen + 4,flags);
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break;
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case VB_TIMETICK:
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case VB_COUNTER32:
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case VB_INT:
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case VB_GAUGE32:
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tlen += dissect_val32(tvb, subtree,offset + tlen + 4, flags);
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break;
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case VB_COUNTER64:
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tlen += dissect_val64(tvb, subtree,offset + tlen + 4, flags);
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break;
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case VB_NULL:
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case VB_NOSUCHOBJ:
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case VB_NOSUCHINST:
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case VB_ENDOFMIB:
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break;
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}
|
|
return tlen + 4;
|
|
}
|
|
|
|
static void dissect_response_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
gboolean little_endian = !(flags & NETWORK_BYTE_ORDER);
|
|
guint32 r_uptime;
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "Response-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_response);
|
|
|
|
r_uptime = little_endian ? \
|
|
tvb_get_letohl(tvb, offset) : tvb_get_ntohl(tvb, offset);
|
|
|
|
proto_tree_add_uint_format(subtree, hf_resp_uptime, tvb, offset, 4, r_uptime,
|
|
"sysUptime: %s", time_msecs_to_str(r_uptime));
|
|
proto_tree_add_item(subtree, hf_resp_error, tvb, offset + 4, 2, little_endian);
|
|
proto_tree_add_item(subtree, hf_resp_index, tvb, offset + 6, 2, little_endian);
|
|
offset += 8;
|
|
|
|
while(len > offset) {
|
|
offset += dissect_varbind(tvb, subtree, offset, len, flags);
|
|
}
|
|
}
|
|
|
|
static void dissect_getnext_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "GetNext-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_getnext);
|
|
|
|
if(flags & NON_DEFAULT_CONTEXT) {
|
|
/* show context */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
while(len > offset) {
|
|
offset += dissect_search_range(tvb, subtree, offset, flags);
|
|
}
|
|
}
|
|
|
|
static void dissect_get_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "Get-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_get);
|
|
|
|
if(flags & NON_DEFAULT_CONTEXT) {
|
|
/* show context */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
while(len >= offset) {
|
|
offset += dissect_search_range(tvb, subtree, offset, flags);
|
|
offset += 4; /* skip 0 end dword */
|
|
}
|
|
}
|
|
|
|
static void dissect_getbulk_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
gboolean little_endian = !(flags & NETWORK_BYTE_ORDER);
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "GetBulk-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_getbulk);
|
|
|
|
if(flags & NON_DEFAULT_CONTEXT) {
|
|
/* show context */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
proto_tree_add_item(subtree, hf_gbulk_nrepeat, tvb, offset, 2, little_endian);
|
|
proto_tree_add_item(subtree, hf_gbulk_mrepeat, tvb, offset + 2, 2, little_endian);
|
|
offset+=4;
|
|
|
|
while(len >= offset) {
|
|
offset += dissect_search_range(tvb, subtree, offset, flags);
|
|
}
|
|
}
|
|
|
|
static void dissect_open_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
guint8 timeout;
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "Open-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_open);
|
|
|
|
timeout = tvb_get_guint8(tvb, offset);
|
|
tvb_get_ntoh24(tvb, offset + 1);
|
|
|
|
proto_tree_add_uint(subtree, hf_open_timeout, tvb, offset, 1, timeout);
|
|
offset+=4;
|
|
|
|
/* Search Range */
|
|
offset += dissect_object_id(tvb, subtree, offset, flags);
|
|
|
|
/* Octet string */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
static void dissect_close_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
guint8 reason;
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "Close-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_close);
|
|
|
|
reason = tvb_get_guint8(tvb, offset);
|
|
tvb_get_ntoh24(tvb, offset + 1);
|
|
|
|
proto_tree_add_uint(subtree, hf_close_reason, tvb, offset, 1, reason);
|
|
offset+=4;
|
|
}
|
|
|
|
|
|
static void dissect_register_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
gboolean little_endian = !(flags & NETWORK_BYTE_ORDER);
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "Register-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_register);
|
|
|
|
if(flags & NON_DEFAULT_CONTEXT) {
|
|
/* show context */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
proto_tree_add_item(subtree, hf_reg_timeout, tvb, offset, 1, FALSE);
|
|
proto_tree_add_item(subtree, hf_reg_prio, tvb, offset+1, 1, FALSE);
|
|
proto_tree_add_item(subtree, hf_reg_rsid, tvb, offset+2, 1, FALSE);
|
|
offset+=4;
|
|
|
|
/* Region */
|
|
|
|
offset += dissect_object_id(tvb, subtree, offset, flags);
|
|
|
|
if(len > offset) {
|
|
/* Upper bound (opt) */
|
|
proto_tree_add_item(subtree, hf_reg_ubound, tvb, offset, 4, little_endian);
|
|
offset += 4;
|
|
}
|
|
}
|
|
|
|
|
|
static void dissect_unregister_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
gboolean little_endian = !(flags & NETWORK_BYTE_ORDER);
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "Unregister-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_unregister);
|
|
|
|
if(flags & NON_DEFAULT_CONTEXT) {
|
|
/* show context */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
proto_tree_add_item(subtree, hf_unreg_timeout, tvb, offset, 1, FALSE);
|
|
proto_tree_add_item(subtree, hf_unreg_prio, tvb, offset+1, 1, FALSE);
|
|
proto_tree_add_item(subtree, hf_unreg_rsid, tvb, offset+2, 1, FALSE);
|
|
offset+=4;
|
|
|
|
/* Region */
|
|
offset += dissect_object_id(tvb, subtree, offset, flags);
|
|
|
|
if(len > offset) {
|
|
/* Upper bound (opt) */
|
|
proto_tree_add_item(subtree, hf_unreg_ubound, tvb, offset, 4, little_endian);
|
|
offset += 4;
|
|
}
|
|
}
|
|
|
|
static void dissect_testset_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "Testset-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_testset);
|
|
|
|
if(flags & NON_DEFAULT_CONTEXT) {
|
|
/* show context */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
while(len > offset) {
|
|
offset += dissect_varbind(tvb, subtree, offset, len, flags);
|
|
}
|
|
}
|
|
|
|
static void dissect_notify_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "Notify-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_notify);
|
|
|
|
if(flags & NON_DEFAULT_CONTEXT) {
|
|
/* show context */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
while(len > offset) {
|
|
offset += dissect_varbind(tvb, subtree, offset, len, flags);
|
|
}
|
|
}
|
|
|
|
static void dissect_ping_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "Ping-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_ping);
|
|
|
|
if(flags & NON_DEFAULT_CONTEXT) {
|
|
/* show context */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
}
|
|
|
|
static void dissect_idx_alloc_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "IndexAllocate-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_idxalloc);
|
|
|
|
if(flags & NON_DEFAULT_CONTEXT) {
|
|
/* show context */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
while(len > offset) {
|
|
offset += dissect_varbind(tvb, subtree, offset, len, flags);
|
|
}
|
|
}
|
|
|
|
|
|
static void dissect_idx_dealloc_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "IndexDeallocate-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_idxdalloc);
|
|
|
|
if(flags & NON_DEFAULT_CONTEXT) {
|
|
/* show context */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
while(len > offset) {
|
|
offset += dissect_varbind(tvb, subtree, offset, len, flags);
|
|
}
|
|
}
|
|
|
|
static void dissect_add_caps_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "AddAgentCaps-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_addcap);
|
|
|
|
if(flags & NON_DEFAULT_CONTEXT) {
|
|
/* show context */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
offset += dissect_object_id(tvb, subtree, offset, flags);
|
|
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
static void dissect_rem_caps_pdu(tvbuff_t *tvb, proto_tree *tree,int offset,int len, char flags)
|
|
{
|
|
proto_item* item;
|
|
proto_tree* subtree;
|
|
|
|
item = proto_tree_add_text(tree, tvb, offset, len, "RemoveAgentCaps-PDU");
|
|
subtree = proto_item_add_subtree(item, ett_remcap);
|
|
|
|
if(flags & NON_DEFAULT_CONTEXT) {
|
|
/* show context */
|
|
offset += dissect_octet_string(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
offset += dissect_object_id(tvb, subtree, offset, flags);
|
|
}
|
|
|
|
|
|
static guint get_agentx_pdu_len(tvbuff_t *tvb, int offset)
|
|
{
|
|
guint8 flags;
|
|
guint32 plen;
|
|
|
|
/*
|
|
* Get the payload length.
|
|
*/
|
|
flags = tvb_get_guint8(tvb, offset + 2);
|
|
NORLEL(flags, plen, tvb, offset + 16);
|
|
|
|
/*
|
|
* Arbitrarily limit it to 2^24, so we don't have to worry about
|
|
* overflow.
|
|
*/
|
|
if (plen > 0xFFFFFF)
|
|
plen = 0xFFFFFF;
|
|
|
|
/*
|
|
* That length doesn't include the header; add that in.
|
|
*/
|
|
return plen + 20;
|
|
}
|
|
|
|
static void dissect_agentx_pdu(tvbuff_t *tvb, packet_info *pinfo,
|
|
proto_tree *tree)
|
|
{
|
|
int offset = 0;
|
|
proto_tree* agentx_tree ,*pdu_hdr_tree;
|
|
proto_item* pdu_item , *t_item;
|
|
guint8 version;
|
|
guint8 type;
|
|
guint8 flags;
|
|
guint32 session_id;
|
|
guint32 trans_id;
|
|
guint32 packet_id;
|
|
guint32 payload_len;
|
|
|
|
version = tvb_get_guint8(tvb,0); offset+=1;
|
|
type = tvb_get_guint8(tvb,1); offset+=1;
|
|
flags = tvb_get_guint8(tvb,2); offset+=1;
|
|
/* skip reserved byte */
|
|
offset+=1;
|
|
|
|
NORLEL(flags, session_id, tvb, 4); offset+=4;
|
|
NORLEL(flags, trans_id, tvb, 8); offset+=4;
|
|
NORLEL(flags, packet_id, tvb, 12); offset+=4;
|
|
NORLEL(flags, payload_len, tvb, 16); offset+=4;
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "AgentX");
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s: sid=%d, tid=%d, packid=%d, plen=%d",
|
|
val_to_str(type,type_values,"unknown"),
|
|
session_id,trans_id,packet_id,payload_len);
|
|
|
|
|
|
if(!tree)
|
|
return;
|
|
|
|
/*t_item = proto_tree_add_item(tree, proto_agentx, tvb, 0, -1, FALSE);*/
|
|
t_item = proto_tree_add_protocol_format(tree, proto_agentx, tvb, 0, -1,
|
|
"Agent Extensibility (AgentX) Protocol: %s, sid=%d, tid=%d, packid=%d, plen=%d",
|
|
val_to_str(type,type_values,"unknown"),
|
|
session_id,trans_id,packet_id,payload_len);
|
|
agentx_tree = proto_item_add_subtree(t_item, ett_agentx);
|
|
|
|
pdu_item = proto_tree_add_text(agentx_tree, tvb, 0, 5, "PDU Header: Type[%u], len=%d, sid=%d, tid=%d, packid=%d",
|
|
(char)type,payload_len,session_id,trans_id,packet_id);
|
|
|
|
pdu_hdr_tree = proto_item_add_subtree(pdu_item, ett_pdu_hdr);
|
|
|
|
proto_tree_add_uint(pdu_hdr_tree,hf_version,tvb,0,1,version);
|
|
proto_tree_add_uint(pdu_hdr_tree,hf_type,tvb,1,1,type);
|
|
proto_tree_add_uint(pdu_hdr_tree,hf_flags,tvb,2,1,flags);
|
|
proto_tree_add_uint(pdu_hdr_tree,hf_session_id,tvb,4,4,session_id);
|
|
proto_tree_add_uint(pdu_hdr_tree,hf_trans_id,tvb,8,4,trans_id);
|
|
proto_tree_add_uint(pdu_hdr_tree,hf_packet_id,tvb,12,4,packet_id);
|
|
proto_tree_add_uint(pdu_hdr_tree,hf_payload_len,tvb,16,4,payload_len);
|
|
|
|
switch(type) {
|
|
case AGENTX_OPEN_PDU:
|
|
dissect_open_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_CLOSE_PDU:
|
|
dissect_close_pdu(tvb, pdu_hdr_tree, offset,payload_len);
|
|
break;
|
|
|
|
case AGENTX_REGISTER_PDU:
|
|
dissect_register_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_UNREGISTER_PDU:
|
|
dissect_unregister_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_GET_PDU:
|
|
dissect_get_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_GETNEXT_PDU:
|
|
dissect_getnext_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_GETBULK_PDU:
|
|
dissect_getbulk_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_TESTSET_PDU:
|
|
dissect_testset_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_COMMITSET_PDU:
|
|
case AGENTX_UNDOSET_PDU:
|
|
case AGENTX_CLEANUPSET_PDU:
|
|
/* there is no parameters */
|
|
break;
|
|
|
|
case AGENTX_NOTIFY_PDU:
|
|
dissect_notify_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_PING_PDU:
|
|
dissect_ping_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_INDEX_ALLOC_PDU:
|
|
dissect_idx_alloc_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_INDEX_DEALLOC_PDU:
|
|
dissect_idx_dealloc_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_ADD_AGENT_CAPS_PDU:
|
|
dissect_add_caps_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_REM_AGENT_CAPS_PDU:
|
|
dissect_rem_caps_pdu(tvb, pdu_hdr_tree, offset,payload_len,flags);
|
|
break;
|
|
|
|
case AGENTX_RESPONSE_PDU:
|
|
dissect_response_pdu(tvb, pdu_hdr_tree, offset, payload_len, flags);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void dissect_agentx(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
tcp_dissect_pdus(tvb, pinfo, tree, TRUE, 20, get_agentx_pdu_len,
|
|
dissect_agentx_pdu);
|
|
}
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void
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proto_register_agentx(void)
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{
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static hf_register_info hf[] = {
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{ &hf_version,
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{ "Version ", "agentx.version", FT_UINT8, BASE_DEC, NULL, 0x0,
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"header version", HFILL }},
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{ &hf_type,
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{ "Type ", "agentx.type", FT_UINT8, BASE_DEC, VALS(type_values), 0x0,
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"header type", HFILL }},
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{ &hf_flags,
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{ "Flags ", "agentx.flags", FT_UINT8, BASE_DEC, NULL, 0x0,
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"header type", HFILL }},
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{ &hf_session_id,
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{ "sessionID ", "agentx.session_id", FT_UINT32, BASE_DEC, NULL, 0x0,
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"Session ID", HFILL }},
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{ &hf_trans_id,
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{ "TransactionID ", "agentx.transaction_id", FT_UINT32, BASE_DEC, NULL, 0x0,
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"Transaction ID", HFILL }},
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{ &hf_packet_id,
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{ "PacketID ", "agentx.packet_id", FT_UINT32, BASE_DEC, NULL, 0x0,
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"Packet ID", HFILL }},
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{ &hf_payload_len,
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{ "Payload length ", "agentx.payload_len", FT_UINT32, BASE_DEC, NULL, 0x0,
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"Payload length", HFILL }},
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{ &hf_ostring,
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{ "Octet String", "agentx.ostring", FT_STRING, BASE_NONE, NULL, 0x0,
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"Octet String", HFILL }},
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{ &hf_ostring_len,
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{ "OString len", "agentx.ostring_len", FT_UINT32, BASE_DEC, NULL, 0x0,
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"Octet String Length", HFILL }},
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{ &hf_oid_sub,
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{ "Number subids ", "agentx.n_subid", FT_UINT8, BASE_DEC, NULL, 0x0,
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"Number subids", HFILL }},
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{ &hf_oid_prefix,
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{ "OID prefix ", "agentx.oid_prefix", FT_UINT8, BASE_DEC, NULL, 0x0,
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"OID prefix", HFILL }},
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{ &hf_oid_include,
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{ "OID include ", "agentx.oid_include", FT_UINT8, BASE_DEC, NULL, 0x0,
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"OID include", HFILL }},
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{ &hf_oid_str,
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{ "OID", "agentx.oid", FT_STRING, BASE_DEC, NULL, 0x0,
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"OID", HFILL }},
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{ &hf_resp_uptime,
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{ "sysUpTime", "agentx.r.uptime", FT_UINT32, BASE_DEC, NULL, 0x0,
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"sysUpTime", HFILL }},
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{ &hf_resp_error,
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{ "Resp. error", "agentx.r.error", FT_UINT16, BASE_DEC, VALS(resp_errors), 0x0,
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"response error", HFILL }},
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{ &hf_resp_index,
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{ "Resp. index", "agentx.r.index", FT_UINT16, BASE_DEC, NULL, 0x0,
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"response index", HFILL }},
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{ &hf_vtag,
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{ "Variable type", "agentx.v.tag", FT_UINT16, BASE_DEC, VALS(vtag_values), 0x0,
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"vtag", HFILL }},
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|
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{ &hf_val32,
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|
{ "Value(32)", "agentx.v.val32", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"val32", HFILL }},
|
|
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|
{ &hf_val64,
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|
{ "Value(64)", "agentx.v.val64", FT_UINT64, BASE_DEC, NULL, 0x0,
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"val64", HFILL }},
|
|
|
|
{ &hf_open_timeout,
|
|
{ "Timeout", "agentx.o.timeout", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"open timeout", HFILL }},
|
|
|
|
{ &hf_close_reason,
|
|
{ "Reason", "agentx.c.reason", FT_UINT8, BASE_DEC, VALS(close_reasons), 0x0,
|
|
"close reason", HFILL }},
|
|
|
|
{ &hf_reg_timeout,
|
|
{ "Timeout", "agentx.r.timeout", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Register timeout", HFILL }},
|
|
|
|
{ &hf_reg_prio,
|
|
{ "Priority", "agentx.r.priority", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Register Priority", HFILL }},
|
|
|
|
{ &hf_reg_rsid,
|
|
{ "Range_subid", "agentx.r.range_subid", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Register range_subid", HFILL }},
|
|
|
|
{ &hf_reg_ubound,
|
|
{ "Upper bound", "agentx.r.upper_bound", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"Register upper bound", HFILL }},
|
|
|
|
{ &hf_unreg_timeout,
|
|
{ "Timeout", "agentx.u.timeout", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Unregister timeout", HFILL }},
|
|
|
|
{ &hf_unreg_prio,
|
|
{ "Priority", "agentx.u.priority", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Unegister Priority", HFILL }},
|
|
|
|
{ &hf_unreg_rsid,
|
|
{ "Range_subid", "agentx.u.range_subid", FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"Unegister range_subid", HFILL }},
|
|
|
|
{ &hf_unreg_ubound,
|
|
{ "Upper bound", "agentx.u.upper_bound", FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"Register upper bound", HFILL }},
|
|
|
|
{ &hf_gbulk_nrepeat,
|
|
{ "Repeaters", "agentx.gb.nrepeat", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"getBulk Num. repeaters", HFILL }},
|
|
|
|
{ &hf_gbulk_mrepeat,
|
|
{ "Max Repetition", "agentx.gb.mrepeat", FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"getBulk Max repetition", HFILL }},
|
|
|
|
|
|
/* Add more fields here */
|
|
|
|
};
|
|
|
|
static gint *ett[] = {
|
|
&ett_agentx,
|
|
&ett_pdu_hdr,
|
|
&ett_get,
|
|
&ett_getnext,
|
|
&ett_search_range,
|
|
&ett_obj_ident,
|
|
&ett_response,
|
|
&ett_valrep,
|
|
&ett_open,
|
|
&ett_close,
|
|
&ett_register,
|
|
&ett_unregister,
|
|
&ett_getbulk,
|
|
&ett_testset,
|
|
&ett_commitset,
|
|
&ett_undoset,
|
|
&ett_cleanupset,
|
|
&ett_notify,
|
|
&ett_ping,
|
|
&ett_idxalloc,
|
|
&ett_idxdalloc,
|
|
&ett_addcap,
|
|
&ett_remcap,
|
|
};
|
|
|
|
|
|
module_t *agentx_module;
|
|
|
|
proto_agentx = proto_register_protocol("AgentX",
|
|
"AgentX", "agentx");
|
|
|
|
proto_register_field_array(proto_agentx, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
agentx_module = prefs_register_protocol(proto_agentx, proto_reg_handoff_agentx);
|
|
|
|
prefs_register_uint_preference(agentx_module, "tcp.agentx_port",
|
|
"AgentX listener TCP Port",
|
|
"Set the TCP port for AgentX"
|
|
"(if other than the default of 705)",
|
|
10, &global_agentx_tcp_port);
|
|
|
|
}
|
|
|
|
/* The registration hand-off routine */
|
|
void
|
|
proto_reg_handoff_agentx(void)
|
|
{
|
|
static int agentx_prefs_initialized = FALSE;
|
|
static dissector_handle_t agentx_handle;
|
|
|
|
if(!agentx_prefs_initialized) {
|
|
agentx_handle = create_dissector_handle(dissect_agentx, proto_agentx);
|
|
agentx_prefs_initialized = TRUE;
|
|
}
|
|
else {
|
|
dissector_delete("tcp.port",global_agentx_tcp_port, agentx_handle);
|
|
|
|
}
|
|
|
|
agentx_tcp_port = global_agentx_tcp_port;
|
|
|
|
dissector_add("tcp.port", agentx_tcp_port, agentx_handle);
|
|
}
|
|
|
|
/* Start the functions we need for the plugin stuff */
|
|
|
|
#ifndef ENABLE_STATIC
|
|
|
|
G_MODULE_EXPORT void
|
|
plugin_register(void)
|
|
{
|
|
/* register the new protocol, protocol fields, and subtrees */
|
|
if (proto_agentx == -1) { /* execute protocol initialization only once */
|
|
proto_register_agentx();
|
|
}
|
|
}
|
|
|
|
G_MODULE_EXPORT void
|
|
plugin_reg_handoff(void){
|
|
proto_reg_handoff_agentx();
|
|
}
|
|
|
|
#endif
|
|
|
|
/* End the functions we need for plugin stuff */
|