forked from osmocom/wireshark
832 lines
36 KiB
C
832 lines
36 KiB
C
/* packet-cops.c
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* Routines for the COPS (Common Open Policy Service) protocol dissection
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* RFC2748
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*
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* Copyright 2000, Heikki Vatiainen <hessu@cs.tut.fi>
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*
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* $Id: packet-cops.c,v 1.13 2001/06/18 02:17:45 guy Exp $
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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 1998 Gerald Combs
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*
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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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include "packet.h"
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#include "packet-ipv6.h"
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#define TCP_PORT_COPS 3288
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#define COPS_OBJECT_HDR_SIZE 4
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static const value_string cops_flags_vals[] = {
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{ 0x00, "None" },
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{ 0x01, "Solicited Message Flag Bit" },
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{ 0, NULL },
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};
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/* The different COPS message types */
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enum cops_op_code {
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COPS_NO_MSG, /* Not a COPS Message type */
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COPS_MSG_REQ, /* Request (REQ) */
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COPS_MSG_DEC, /* Decision (DEC) */
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COPS_MSG_RPT, /* Report State (RPT) */
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COPS_MSG_DRQ, /* Delete Request State (DRQ) */
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COPS_MSG_SSQ, /* Synchronize State Req (SSQ) */
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COPS_MSG_OPN, /* Client-Open (OPN) */
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COPS_MSG_CAT, /* Client-Accept (CAT) */
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COPS_MSG_CC, /* Client-Close (CC) */
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COPS_MSG_KA, /* Keep-Alive (KA) */
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COPS_MSG_SSC, /* Synchronize Complete (SSC) */
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COPS_LAST_OP_CODE /* For error checking */
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};
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static const value_string cops_op_code_vals[] = {
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{ COPS_MSG_REQ, "Request (REQ)" },
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{ COPS_MSG_DEC, "Decision (DEC)" },
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{ COPS_MSG_RPT, "Report State (RPT)" },
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{ COPS_MSG_DRQ, "Delete Request State (DRQ)" },
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{ COPS_MSG_SSQ, "Synchronize State Req (SSQ)" },
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{ COPS_MSG_OPN, "Client-Open (OPN)" },
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{ COPS_MSG_CAT, "Client-Accept (CAT)" },
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{ COPS_MSG_CC, "Client-Close (CC)" },
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{ COPS_MSG_KA, "Keep-Alive (KA)" },
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{ COPS_MSG_SSC, "Synchronize Complete (SSC)" },
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{ 0, NULL },
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};
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/* The different objects in COPS messages */
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enum cops_c_num {
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COPS_NO_OBJECT, /* Not a COPS Object type */
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COPS_OBJ_HANDLE, /* Handle Object (Handle) */
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COPS_OBJ_CONTEXT, /* Context Object (Context) */
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COPS_OBJ_IN_INT, /* In-Interface Object (IN-Int) */
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COPS_OBJ_OUT_INT, /* Out-Interface Object (OUT-Int) */
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COPS_OBJ_REASON, /* Reason Object (Reason) */
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COPS_OBJ_DECISION, /* Decision Object (Decision) */
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COPS_OBJ_LPDPDECISION, /* LPDP Decision Object (LPDPDecision) */
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COPS_OBJ_ERROR, /* Error Object (Error) */
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COPS_OBJ_CLIENTSI, /* Client Specific Information Object (ClientSI) */
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COPS_OBJ_KATIMER, /* Keep-Alive Timer Object (KATimer) */
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COPS_OBJ_PEPID, /* PEP Identification Object (PEPID) */
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COPS_OBJ_REPORT_TYPE, /* Report-Type Object (Report-Type) */
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COPS_OBJ_PDPREDIRADDR, /* PDP Redirect Address Object (PDPRedirAddr) */
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COPS_OBJ_LASTPDPADDR, /* Last PDP Address (LastPDPaddr) */
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COPS_OBJ_ACCTTIMER, /* Accounting Timer Object (AcctTimer) */
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COPS_OBJ_INTEGRITY, /* Message Integrity Object (Integrity) */
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COPS_LAST_C_NUM /* For error checking */
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};
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static const value_string cops_c_num_vals[] = {
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{ COPS_OBJ_HANDLE, "Handle Object (Handle)" },
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{ COPS_OBJ_CONTEXT, "Context Object (Context)" },
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{ COPS_OBJ_IN_INT, "In-Interface Object (IN-Int)" },
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{ COPS_OBJ_OUT_INT, "Out-Interface Object (OUT-Int)" },
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{ COPS_OBJ_REASON, "Reason Object (Reason)" },
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{ COPS_OBJ_DECISION, "Decision Object (Decision)" },
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{ COPS_OBJ_LPDPDECISION, "LPDP Decision Object (LPDPDecision)" },
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{ COPS_OBJ_ERROR, "Error Object (Error)" },
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{ COPS_OBJ_CLIENTSI, "Client Specific Information Object (ClientSI)" },
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{ COPS_OBJ_KATIMER, "Keep-Alive Timer Object (KATimer)" },
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{ COPS_OBJ_PEPID, "PEP Identification Object (PEPID)" },
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{ COPS_OBJ_REPORT_TYPE, "Report-Type Object (Report-Type)" },
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{ COPS_OBJ_PDPREDIRADDR, "PDP Redirect Address Object (PDPRedirAddr)" },
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{ COPS_OBJ_LASTPDPADDR, "Last PDP Address (LastPDPaddr)" },
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{ COPS_OBJ_ACCTTIMER, "Accounting Timer Object (AcctTimer)" },
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{ COPS_OBJ_INTEGRITY, "Message Integrity Object (Integrity)" },
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{ 0, NULL },
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};
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/* R-Type is carried within the Context Object */
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static const value_string cops_r_type_vals[] = {
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{ 0x01, "Incoming-Message/Admission Control request" },
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{ 0x02, "Resource-Allocation request" },
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{ 0x04, "Outgoing-Message request" },
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{ 0x08, "Configuration request" },
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{ 0, NULL },
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};
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/* Reason-Code is carried within the Reason object */
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static const value_string cops_reason_vals[] = {
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{ 1, "Unspecified" },
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{ 2, "Management" },
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{ 3, "Preempted (Another request state takes precedence)" },
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{ 4, "Tear (Used to communicate a signaled state removal)" },
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{ 5, "Timeout (Local state has timed-out)" },
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{ 6, "Route Change (Change invalidates request state)" },
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{ 7, "Insufficient Resources (No local resource available)" },
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{ 8, "PDP's Directive (PDP decision caused the delete)" },
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{ 9, "Unsupported decision (PDP decision not supported)" },
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{ 10, "Synchronize Handle Unknown" },
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{ 11, "Transient Handle (stateless event)" },
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{ 12, "Malformed Decision (could not recover)" },
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{ 13, "Unknown COPS Object from PDP" },
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{ 0, NULL },
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};
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/* Command-Code is carried within the Decision object if C-Type is 1 */
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static const value_string cops_dec_cmd_code_vals[] = {
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{ 0, "NULL Decision (No configuration data available)" },
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{ 1, "Install (Admit request/Install configuration)" },
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{ 2, "Remove (Remove request/Remove configuration)" },
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{ 0, NULL },
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};
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/* Decision flags are also carried with the Decision object if C-Type is 1 */
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static const value_string cops_dec_cmd_flag_vals[] = {
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{ 0x00, "<None set>" },
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{ 0x01, "Trigger Error (Trigger error message if set)" },
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{ 0, NULL },
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};
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/* Error-Code from Error object */
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static const value_string cops_error_vals[] = {
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{1, "Bad handle" },
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{2, "Invalid handle reference" },
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{3, "Bad message format (Malformed Message)" },
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{4, "Unable to process (server gives up on query)" },
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{5, "Mandatory client-specific info missing" },
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{6, "Unsupported client" },
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{7, "Mandatory COPS object missing" },
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{8, "Client Failure" },
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{9, "Communication Failure" },
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{10, "Unspecified" },
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{11, "Shutting down" },
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{12, "Redirect to Preferred Server" },
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{13, "Unknown COPS Object" },
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{14, "Authentication Failure" },
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{15, "Authentication Required" },
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{0, NULL },
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};
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/* Report-Type from Report-Type object */
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static const value_string cops_report_type_vals[] = {
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{1, " Success : Decision was successful at the PEP" },
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{2, " Failure : Decision could not be completed by PEP" },
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{3, " Accounting: Accounting update for an installed state" },
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{0, NULL },
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};
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/* Initialize the protocol and registered fields */
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static gint proto_cops = -1;
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static gint hf_cops_ver_flags = -1;
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static gint hf_cops_version = -1;
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static gint hf_cops_flags = -1;
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static gint hf_cops_op_code = -1;
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static gint hf_cops_client_type = -1;
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static gint hf_cops_msg_len = -1;
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static gint hf_cops_obj_len = -1;
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static gint hf_cops_obj_c_num = -1;
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static gint hf_cops_obj_c_type = -1;
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static gint hf_cops_r_type_flags = -1;
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static gint hf_cops_m_type_flags = -1;
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static gint hf_cops_in_int_ipv4 = -1;
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static gint hf_cops_in_int_ipv6 = -1;
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static gint hf_cops_out_int_ipv4 = -1;
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static gint hf_cops_out_int_ipv6 = -1;
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static gint hf_cops_int_ifindex = -1;
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static gint hf_cops_reason = -1;
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static gint hf_cops_reason_sub = -1;
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static gint hf_cops_dec_cmd_code = -1;
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static gint hf_cops_dec_flags = -1;
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static gint hf_cops_error = -1;
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static gint hf_cops_error_sub = -1;
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static gint hf_cops_katimer = -1;
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static gint hf_cops_pepid = -1;
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static gint hf_cops_report_type = -1;
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static gint hf_cops_pdprediraddr_ipv4 = -1;
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static gint hf_cops_pdprediraddr_ipv6 = -1;
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static gint hf_cops_lastpdpaddr_ipv4 = -1;
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static gint hf_cops_lastpdpaddr_ipv6 = -1;
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static gint hf_cops_pdp_tcp_port = -1;
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static gint hf_cops_accttimer = -1;
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static gint hf_cops_key_id = -1;
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static gint hf_cops_seq_num = -1;
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/* Initialize the subtree pointers */
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static gint ett_cops = -1;
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static gint ett_cops_ver_flags = -1;
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static gint ett_cops_obj = -1;
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static gint ett_cops_obj_data = -1;
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static gint ett_cops_r_type_flags = -1;
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static gint ett_cops_itf = -1;
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static gint ett_cops_reason = -1;
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static gint ett_cops_decision = -1;
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static gint ett_cops_error = -1;
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static gint ett_cops_pdp = -1;
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static int dissect_cops_object(tvbuff_t *tvb, guint32 offset, proto_tree *tree);
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static int dissect_cops_object_data(tvbuff_t *tvb, guint32 offset, proto_tree *tree,
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guint8 c_num, guint8 c_type, guint16 len);
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/* Code to actually dissect the packets */
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static void dissect_cops(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
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{
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guint8 op_code;
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if (check_col(pinfo->fd, COL_PROTOCOL))
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col_set_str(pinfo->fd, COL_PROTOCOL, "COPS");
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if (check_col(pinfo->fd, COL_INFO))
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col_clear(pinfo->fd, COL_INFO);
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op_code = tvb_get_guint8(tvb, 1);
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if (check_col(pinfo->fd, COL_INFO))
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col_add_fstr(pinfo->fd, COL_INFO, "COPS %s",
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val_to_str(op_code, cops_op_code_vals, "Unknown Op Code"));
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if (tree) {
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proto_item *ti, *tv;
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proto_tree *cops_tree, *ver_flags_tree;
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guint32 offset, msg_len;
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guint8 ver_flags;
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gint garbage;
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offset = 0;
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ti = proto_tree_add_item(tree, proto_cops, tvb, offset, tvb_length(tvb), FALSE);
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cops_tree = proto_item_add_subtree(ti, ett_cops);
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/* Version and flags share the same byte, put them in a subtree */
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ver_flags = tvb_get_guint8(tvb, offset);
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tv = proto_tree_add_uint_format(cops_tree, hf_cops_ver_flags, tvb, offset, 1,
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ver_flags, "Version: %u, Flags: %s",
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hi_nibble(ver_flags),
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val_to_str(lo_nibble(ver_flags), cops_flags_vals, "Unknown"));
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ver_flags_tree = proto_item_add_subtree(tv, ett_cops_ver_flags);
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proto_tree_add_uint(ver_flags_tree, hf_cops_version, tvb, offset, 1, ver_flags);
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proto_tree_add_uint(ver_flags_tree, hf_cops_flags, tvb, offset, 1, ver_flags);
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offset++;
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proto_tree_add_uint(cops_tree, hf_cops_op_code, tvb, offset, 1, tvb_get_guint8(tvb, offset));
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offset ++;
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proto_tree_add_uint(cops_tree, hf_cops_client_type, tvb, offset, 2, tvb_get_ntohs(tvb, offset));
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offset += 2;
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msg_len = tvb_get_ntohl(tvb, offset);
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proto_tree_add_uint(cops_tree, hf_cops_msg_len, tvb, offset, 4, tvb_get_ntohl(tvb, offset));
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offset += 4;
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while (msg_len >= COPS_OBJECT_HDR_SIZE) {
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int consumed;
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consumed = dissect_cops_object(tvb, offset, cops_tree);
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if (consumed == 0)
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break;
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msg_len -= consumed;
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offset += consumed;
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}
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garbage = tvb_length_remaining(tvb, offset);
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if (garbage > 0)
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proto_tree_add_text(cops_tree, tvb, offset, garbage,
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"Trailing garbage: %d byte%s", garbage,
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plurality(garbage, "", "s"));
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}
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return;
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}
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static char *cops_c_type_to_str(guint8 c_num, guint8 c_type)
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{
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switch (c_num) {
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case COPS_OBJ_HANDLE:
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if (c_type == 1)
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return "Client Handle";
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break;
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case COPS_OBJ_IN_INT:
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case COPS_OBJ_OUT_INT:
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if (c_type == 1)
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return "IPv4 Address + Interface";
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else if (c_type == 2)
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return "IPv6 Address + Interface";
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break;
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case COPS_OBJ_DECISION:
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case COPS_OBJ_LPDPDECISION:
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if (c_type == 1)
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return "Decision Flags (Mandatory)";
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else if (c_type == 2)
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return "Stateless Data";
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else if (c_type == 3)
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return "Replacement Data";
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else if (c_type == 4)
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return "Client Specific Decision Data";
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else if (c_type == 5)
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return "Named Decision Data";
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break;
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case COPS_OBJ_CLIENTSI:
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if (c_type == 1)
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return "Signaled ClientSI";
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else if (c_type == 2)
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return "Named ClientSI";
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break;
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case COPS_OBJ_KATIMER:
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if (c_type == 1)
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return "Keep-alive timer value";
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break;
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case COPS_OBJ_PDPREDIRADDR:
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case COPS_OBJ_LASTPDPADDR:
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if (c_type == 1)
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return "IPv4 Address + TCP Port";
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else if (c_type == 2)
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return "IPv6 Address + TCP Port";
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break;
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case COPS_OBJ_ACCTTIMER:
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if (c_type == 1)
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return "Accounting timer value";
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break;
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case COPS_OBJ_INTEGRITY:
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if (c_type == 1)
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return "HMAC digest";
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break;
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}
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return "";
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}
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static int dissect_cops_object(tvbuff_t *tvb, guint32 offset, proto_tree *tree)
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{
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guint16 object_len, contents_len;
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guint8 c_num, c_type;
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proto_item *ti;
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proto_tree *obj_tree;
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char *type_str;
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int ret;
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if (tvb_length_remaining(tvb, offset) < COPS_OBJECT_HDR_SIZE)
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return 0;
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object_len = tvb_get_ntohs(tvb, offset);
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c_num = tvb_get_guint8(tvb, offset + 2);
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c_type = tvb_get_guint8(tvb, offset + 3);
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ti = proto_tree_add_uint_format(tree, hf_cops_obj_c_num, tvb, offset, object_len, c_num,
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"%s: %s", val_to_str(c_num, cops_c_num_vals, "Unknown"),
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cops_c_type_to_str(c_num, c_type));
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obj_tree = proto_item_add_subtree(ti, ett_cops_obj);
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proto_tree_add_uint(obj_tree, hf_cops_obj_len, tvb, offset, 2, tvb_get_ntohs(tvb, offset));
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offset += 2;
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proto_tree_add_uint(obj_tree, hf_cops_obj_c_num, tvb, offset, 1, c_num);
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offset++;
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type_str = cops_c_type_to_str(c_num, c_type);
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proto_tree_add_text(obj_tree, tvb, offset, 1, "C-Type: %s%s%u%s",
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type_str,
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strlen(type_str) ? " (" : "",
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c_type,
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strlen(type_str) ? ")" : "");
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offset++;
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contents_len = object_len - COPS_OBJECT_HDR_SIZE;
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ret = dissect_cops_object_data(tvb, offset, obj_tree, c_num, c_type, contents_len);
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if (ret < 0) return 0;
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/* Pad to 32bit boundary */
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if (object_len % sizeof (guint32))
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object_len += (sizeof (guint32) - object_len % sizeof (guint32));
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return object_len;
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}
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static int dissect_cops_object_data(tvbuff_t *tvb, guint32 offset, proto_tree *tree,
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guint8 c_num, guint8 c_type, guint16 len)
|
|
{
|
|
proto_item *ti;
|
|
proto_tree *r_type_tree, *itf_tree, *reason_tree, *dec_tree, *error_tree, *pdp_tree;
|
|
guint16 r_type, m_type, reason, reason_sub, cmd_code, cmd_flags, error, error_sub, tcp_port;
|
|
guint32 ipv4addr, ifindex;
|
|
struct e_in6_addr ipv6addr;
|
|
|
|
switch (c_num) {
|
|
case COPS_OBJ_CONTEXT:
|
|
r_type = tvb_get_ntohs(tvb, offset);
|
|
m_type = tvb_get_ntohs(tvb, offset + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 4, "Contents: R-Type: %s, M-Type: %u",
|
|
val_to_str(r_type, cops_r_type_vals, "Unknown"),
|
|
m_type);
|
|
|
|
r_type_tree = proto_item_add_subtree(ti, ett_cops_r_type_flags);
|
|
proto_tree_add_uint(r_type_tree, hf_cops_r_type_flags, tvb, offset, 2, r_type);
|
|
offset += 2;
|
|
proto_tree_add_uint(r_type_tree, hf_cops_m_type_flags, tvb, offset, 2, m_type);
|
|
|
|
return 0;
|
|
break;
|
|
case COPS_OBJ_IN_INT:
|
|
case COPS_OBJ_OUT_INT:
|
|
if (c_type == 1) { /* IPv4 */
|
|
tvb_memcpy(tvb, (guint8 *)&ipv4addr, offset, 4);
|
|
ifindex = tvb_get_ntohl(tvb, offset + 4);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 8, "Contents: IPv4 address %s, ifIndex: %u",
|
|
ip_to_str((guint8 *)&ipv4addr), ifindex);
|
|
itf_tree = proto_item_add_subtree(ti, ett_cops_itf);
|
|
proto_tree_add_ipv4(itf_tree,
|
|
(c_num == COPS_OBJ_IN_INT) ? hf_cops_in_int_ipv4 : hf_cops_out_int_ipv4,
|
|
tvb, offset, 4, ipv4addr);
|
|
offset += 4;
|
|
} else if (c_type == 2) { /* IPv6 */
|
|
tvb_memcpy(tvb, (guint8 *)&ipv6addr, offset, sizeof ipv6addr);
|
|
ifindex = tvb_get_ntohl(tvb, offset + sizeof ipv6addr);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 20, "Contents: IPv6 address %s, ifIndex: %u",
|
|
ip6_to_str(&ipv6addr), ifindex);
|
|
itf_tree = proto_item_add_subtree(ti, ett_cops_itf);
|
|
proto_tree_add_ipv6(itf_tree,
|
|
(c_num == COPS_OBJ_IN_INT) ? hf_cops_in_int_ipv6 : hf_cops_out_int_ipv6,
|
|
tvb, offset, 16, (guint8 *)&ipv6addr);
|
|
offset += 16;
|
|
} else {
|
|
break;
|
|
}
|
|
proto_tree_add_uint(itf_tree, hf_cops_int_ifindex, tvb, offset, 4, ifindex);
|
|
|
|
return 0;
|
|
break;
|
|
case COPS_OBJ_REASON:
|
|
reason = tvb_get_ntohs(tvb, offset);
|
|
reason_sub = tvb_get_ntohs(tvb, offset + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 4, "Contents: Reason-Code: %s, Reason Sub-code: 0x%04x",
|
|
val_to_str(reason, cops_reason_vals, "<Unknown value>"), reason_sub);
|
|
reason_tree = proto_item_add_subtree(ti, ett_cops_reason);
|
|
proto_tree_add_uint(reason_tree, hf_cops_reason, tvb, offset, 2, reason);
|
|
offset += 2;
|
|
if (reason == 13) {
|
|
proto_tree_add_text(reason_tree, tvb, offset, 2, "Reason Sub-code: "
|
|
"Unknown object's C-Num %u, C-Type %u",
|
|
tvb_get_guint8(tvb, offset), tvb_get_guint8(tvb, offset + 1));
|
|
} else
|
|
proto_tree_add_uint(reason_tree, hf_cops_reason_sub, tvb, offset, 2, reason_sub);
|
|
|
|
return 0;
|
|
break;
|
|
case COPS_OBJ_DECISION:
|
|
case COPS_OBJ_LPDPDECISION:
|
|
if (c_type != 1)
|
|
break;
|
|
|
|
cmd_code = tvb_get_ntohs(tvb, offset);
|
|
cmd_flags = tvb_get_ntohs(tvb, offset + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 4, "Contents: Command-Code: %s, Flags: %s",
|
|
val_to_str(cmd_code, cops_dec_cmd_code_vals, "<Unknown value>"),
|
|
val_to_str(cmd_flags, cops_dec_cmd_flag_vals, "<Unknown flag>"));
|
|
dec_tree = proto_item_add_subtree(ti, ett_cops_decision);
|
|
proto_tree_add_uint(dec_tree, hf_cops_dec_cmd_code, tvb, offset, 2, cmd_code);
|
|
offset += 2;
|
|
proto_tree_add_uint(dec_tree, hf_cops_dec_flags, tvb, offset, 2, cmd_flags);
|
|
|
|
return 0;
|
|
break;
|
|
case COPS_OBJ_ERROR:
|
|
if (c_type != 1)
|
|
break;
|
|
|
|
error = tvb_get_ntohs(tvb, offset);
|
|
error_sub = tvb_get_ntohs(tvb, offset + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 4, "Contents: Error-Code: %s, Error Sub-code: 0x%04x",
|
|
val_to_str(error, cops_error_vals, "<Unknown value>"), error_sub);
|
|
error_tree = proto_item_add_subtree(ti, ett_cops_error);
|
|
proto_tree_add_uint(error_tree, hf_cops_error, tvb, offset, 2, error);
|
|
offset += 2;
|
|
if (error == 13) {
|
|
proto_tree_add_text(error_tree, tvb, offset, 2, "Error Sub-code: "
|
|
"Unknown object's C-Num %u, C-Type %u",
|
|
tvb_get_guint8(tvb, offset), tvb_get_guint8(tvb, offset + 1));
|
|
} else
|
|
proto_tree_add_uint(error_tree, hf_cops_error_sub, tvb, offset, 2, error_sub);
|
|
|
|
return 0;
|
|
break;
|
|
case COPS_OBJ_KATIMER:
|
|
if (c_type != 1)
|
|
break;
|
|
|
|
proto_tree_add_item(tree, hf_cops_katimer, tvb, offset + 2, 2, FALSE);
|
|
if (tvb_get_ntohs(tvb, offset + 2) == 0)
|
|
proto_tree_add_text(tree, tvb, offset, 0, "Value of zero implies infinity.");
|
|
|
|
return 0;
|
|
break;
|
|
case COPS_OBJ_PEPID:
|
|
if (c_type != 1)
|
|
break;
|
|
|
|
if (tvb_strnlen(tvb, offset, len) == -1)
|
|
proto_tree_add_text(tree, tvb, offset, len, "<PEP Id is not a NUL terminated ASCII string>");
|
|
else
|
|
proto_tree_add_item(tree, hf_cops_pepid, tvb, offset,
|
|
tvb_strnlen(tvb, offset, len) + 1, FALSE);
|
|
|
|
return 0;
|
|
break;
|
|
case COPS_OBJ_REPORT_TYPE:
|
|
if (c_type != 1)
|
|
break;
|
|
|
|
proto_tree_add_item(tree, hf_cops_report_type, tvb, offset, 2, FALSE);
|
|
|
|
return 0;
|
|
break;
|
|
case COPS_OBJ_PDPREDIRADDR:
|
|
case COPS_OBJ_LASTPDPADDR:
|
|
if (c_type == 1) { /* IPv4 */
|
|
tvb_memcpy(tvb, (guint8 *)&ipv4addr, offset, 4);
|
|
tcp_port = tvb_get_ntohs(tvb, offset + 4 + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 8, "Contents: IPv4 address %s, TCP Port Number: %u",
|
|
ip_to_str((guint8 *)&ipv4addr), tcp_port);
|
|
pdp_tree = proto_item_add_subtree(ti, ett_cops_pdp);
|
|
proto_tree_add_ipv4(pdp_tree,
|
|
(c_num == COPS_OBJ_PDPREDIRADDR) ? hf_cops_pdprediraddr_ipv4 : hf_cops_lastpdpaddr_ipv4,
|
|
tvb, offset, 4, ipv4addr);
|
|
offset += 4;
|
|
} else if (c_type == 2) { /* IPv6 */
|
|
tvb_memcpy(tvb, (guint8 *)&ipv6addr, offset, sizeof ipv6addr);
|
|
tcp_port = tvb_get_ntohs(tvb, offset + sizeof ipv6addr + 2);
|
|
ti = proto_tree_add_text(tree, tvb, offset, 20, "Contents: IPv6 address %s, TCP Port Number: %u",
|
|
ip6_to_str(&ipv6addr), tcp_port);
|
|
pdp_tree = proto_item_add_subtree(ti, ett_cops_pdp);
|
|
proto_tree_add_ipv6(pdp_tree,
|
|
(c_num == COPS_OBJ_PDPREDIRADDR) ? hf_cops_pdprediraddr_ipv6 : hf_cops_lastpdpaddr_ipv6,
|
|
tvb, offset, 16, (guint8 *)&ipv6addr);
|
|
offset += 16;
|
|
} else {
|
|
break;
|
|
}
|
|
offset += 2;
|
|
proto_tree_add_uint(pdp_tree, hf_cops_pdp_tcp_port, tvb, offset, 2, tcp_port);
|
|
|
|
return 0;
|
|
break;
|
|
case COPS_OBJ_ACCTTIMER:
|
|
if (c_type != 1)
|
|
break;
|
|
|
|
proto_tree_add_item(tree, hf_cops_accttimer, tvb, offset + 2, 2, FALSE);
|
|
if (tvb_get_ntohs(tvb, offset + 2) == 0)
|
|
proto_tree_add_text(tree, tvb, offset, 0, "Value of zero means "
|
|
"there SHOULD be no unsolicited accounting updates.");
|
|
|
|
return 0;
|
|
break;
|
|
case COPS_OBJ_INTEGRITY:
|
|
if (c_type != 1)
|
|
break; /* Not HMAC digest */
|
|
|
|
proto_tree_add_item(tree, hf_cops_key_id, tvb, offset, 4, FALSE);
|
|
proto_tree_add_item(tree, hf_cops_seq_num, tvb, offset + 4, 4, FALSE);
|
|
proto_tree_add_text(tree, tvb, offset + 8 , len - 8, "Contents: Keyed Message Digest");
|
|
|
|
return 0;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ti = proto_tree_add_text(tree, tvb, offset, len, "Contents: %u bytes", len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Register the protocol with Ethereal */
|
|
void proto_register_cops(void)
|
|
{
|
|
|
|
/* Setup list of header fields */
|
|
static hf_register_info hf[] = {
|
|
{ &hf_cops_ver_flags,
|
|
{ "Version and Flags", "cops.ver_flags",
|
|
FT_UINT8, BASE_HEX, NULL, 0x0,
|
|
"Version and Flags in COPS Common Header", HFILL }
|
|
},
|
|
{ &hf_cops_version,
|
|
{ "Version", "cops.version",
|
|
FT_UINT8, BASE_DEC, NULL, 0xF0,
|
|
"Version in COPS Common Header", HFILL }
|
|
},
|
|
{ &hf_cops_flags,
|
|
{ "Flags", "cops.flags",
|
|
FT_UINT8, BASE_HEX, VALS(cops_flags_vals), 0x0F,
|
|
"Flags in COPS Common Header", HFILL }
|
|
},
|
|
{ &hf_cops_op_code,
|
|
{ "Op Code", "cops.op_code",
|
|
FT_UINT8, BASE_DEC, VALS(cops_op_code_vals), 0x0,
|
|
"Op Code in COPS Common Header", HFILL }
|
|
},
|
|
{ &hf_cops_client_type,
|
|
{ "Client Type", "cops.client_type",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
"Client Type in COPS Common Header", HFILL }
|
|
},
|
|
{ &hf_cops_msg_len,
|
|
{ "Message Length", "cops.msg_len",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"Message Length in COPS Common Header", HFILL }
|
|
},
|
|
{ &hf_cops_obj_len,
|
|
{ "Object Length", "cops.obj.len",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"Object Length in COPS Object Header", HFILL }
|
|
},
|
|
{ &hf_cops_obj_c_num,
|
|
{ "C-Num", "cops.c_num",
|
|
FT_UINT8, BASE_DEC, VALS(cops_c_num_vals), 0x0,
|
|
"C-Num in COPS Object Header", HFILL }
|
|
},
|
|
{ &hf_cops_obj_c_type,
|
|
{ "C-Type", "cops.c_type",
|
|
FT_UINT8, BASE_DEC, NULL, 0x0,
|
|
"C-Type in COPS Object Header", HFILL }
|
|
},
|
|
{ &hf_cops_r_type_flags,
|
|
{ "R-Type", "cops.context.r_type",
|
|
FT_UINT16, BASE_HEX, VALS(cops_r_type_vals), 0xFFFF,
|
|
"R-Type in COPS Context Object", HFILL }
|
|
},
|
|
{ &hf_cops_m_type_flags,
|
|
{ "M-Type", "cops.context.m_type",
|
|
FT_UINT16, BASE_HEX, NULL, 0xFFFF,
|
|
"M-Type in COPS Context Object", HFILL }
|
|
},
|
|
{ &hf_cops_in_int_ipv4,
|
|
{ "IPv4 address", "cops.in-int.ipv4",
|
|
FT_IPv4, 0, NULL, 0xFFFF,
|
|
"IPv4 address in COPS IN-Int object", HFILL }
|
|
},
|
|
{ &hf_cops_in_int_ipv6,
|
|
{ "IPv6 address", "cops.in-int.ipv6",
|
|
FT_IPv6, 0, NULL, 0xFFFF,
|
|
"IPv6 address in COPS IN-Int object", HFILL }
|
|
},
|
|
{ &hf_cops_out_int_ipv4,
|
|
{ "IPv4 address", "cops.out-int.ipv4",
|
|
FT_IPv4, 0, NULL, 0xFFFF,
|
|
"IPv4 address in COPS OUT-Int object", HFILL }
|
|
},
|
|
{ &hf_cops_out_int_ipv6,
|
|
{ "IPv6 address", "cops.out-int.ipv6",
|
|
FT_IPv6, 0, NULL, 0xFFFF,
|
|
"IPv6 address in COPS OUT-Int", HFILL }
|
|
},
|
|
{ &hf_cops_int_ifindex,
|
|
{ "ifIndex", "cops.in-out-int.ifindex",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"If SNMP is supported, corresponds to MIB-II ifIndex", HFILL }
|
|
},
|
|
{ &hf_cops_reason,
|
|
{ "Reason", "cops.reason",
|
|
FT_UINT16, BASE_DEC, VALS(cops_reason_vals), 0,
|
|
"Reason in Reason object", HFILL }
|
|
},
|
|
{ &hf_cops_reason_sub,
|
|
{ "Reason Sub-code", "cops.reason_sub",
|
|
FT_UINT16, BASE_HEX, NULL, 0,
|
|
"Reason Sub-code in Reason object", HFILL }
|
|
},
|
|
{ &hf_cops_dec_cmd_code,
|
|
{ "Command-Code", "cops.decision.cmd",
|
|
FT_UINT16, BASE_DEC, VALS(cops_dec_cmd_code_vals), 0,
|
|
"Command-Code in Decision/LPDP Decision object", HFILL }
|
|
},
|
|
{ &hf_cops_dec_flags,
|
|
{ "Flags", "cops.decision.flags",
|
|
FT_UINT16, BASE_HEX, VALS(cops_dec_cmd_flag_vals), 0xffff,
|
|
"Flags in Decision/LPDP Decision object", HFILL }
|
|
},
|
|
{ &hf_cops_error,
|
|
{ "Error", "cops.error",
|
|
FT_UINT16, BASE_DEC, VALS(cops_error_vals), 0,
|
|
"Error in Error object", HFILL }
|
|
},
|
|
{ &hf_cops_error_sub,
|
|
{ "Error Sub-code", "cops.error_sub",
|
|
FT_UINT16, BASE_HEX, NULL, 0,
|
|
"Error Sub-code in Error object", HFILL }
|
|
},
|
|
{ &hf_cops_katimer,
|
|
{ "Contents: KA Timer Value", "cops.katimer.value",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
"Keep-Alive Timer Value in KATimer object", HFILL }
|
|
},
|
|
{ &hf_cops_pepid,
|
|
{ "Contents: PEP Id", "cops.pepid.id",
|
|
FT_STRING, BASE_NONE, NULL, 0,
|
|
"PEP Id in PEPID object", HFILL }
|
|
},
|
|
{ &hf_cops_report_type,
|
|
{ "Contents: Report-Type", "cops.report_type",
|
|
FT_UINT16, BASE_DEC, VALS(cops_report_type_vals), 0,
|
|
"Report-Type in Report-Type object", HFILL }
|
|
},
|
|
{ &hf_cops_pdprediraddr_ipv4,
|
|
{ "IPv4 address", "cops.pdprediraddr.ipv4",
|
|
FT_IPv4, 0, NULL, 0xFFFF,
|
|
"IPv4 address in COPS PDPRedirAddr object", HFILL }
|
|
},
|
|
{ &hf_cops_pdprediraddr_ipv6,
|
|
{ "IPv6 address", "cops.pdprediraddr.ipv6",
|
|
FT_IPv6, 0, NULL, 0xFFFF,
|
|
"IPv6 address in COPS PDPRedirAddr object", HFILL }
|
|
},
|
|
{ &hf_cops_lastpdpaddr_ipv4,
|
|
{ "IPv4 address", "cops.lastpdpaddr.ipv4",
|
|
FT_IPv4, 0, NULL, 0xFFFF,
|
|
"IPv4 address in COPS LastPDPAddr object", HFILL }
|
|
},
|
|
{ &hf_cops_lastpdpaddr_ipv6,
|
|
{ "IPv6 address", "cops.lastpdpaddr.ipv6",
|
|
FT_IPv6, 0, NULL, 0xFFFF,
|
|
"IPv6 address in COPS LastPDPAddr object", HFILL }
|
|
},
|
|
{ &hf_cops_pdp_tcp_port,
|
|
{ "TCP Port Number", "cops.pdp.tcp_port",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
"TCP Port Number of PDP in PDPRedirAddr/LastPDPAddr object", HFILL }
|
|
},
|
|
{ &hf_cops_accttimer,
|
|
{ "Contents: ACCT Timer Value", "cops.accttimer.value",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
"Accounting Timer Value in AcctTimer object", HFILL }
|
|
},
|
|
{ &hf_cops_key_id,
|
|
{ "Contents: Key ID", "cops.integrity.key_id",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"Key ID in Integrity object", HFILL }
|
|
},
|
|
{ &hf_cops_seq_num,
|
|
{ "Contents: Sequence Number", "cops.integrity.seq_num",
|
|
FT_UINT32, BASE_DEC, NULL, 0,
|
|
"Sequence Number in Integrity object", HFILL }
|
|
},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_cops,
|
|
&ett_cops_ver_flags,
|
|
&ett_cops_obj,
|
|
&ett_cops_obj_data,
|
|
&ett_cops_r_type_flags,
|
|
&ett_cops_itf,
|
|
&ett_cops_reason,
|
|
&ett_cops_decision,
|
|
&ett_cops_error,
|
|
&ett_cops_pdp,
|
|
};
|
|
|
|
/* Register the protocol name and description */
|
|
proto_cops = proto_register_protocol("Common Open Policy Service",
|
|
"COPS", "cops");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_cops, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
};
|
|
|
|
void
|
|
proto_reg_handoff_cops(void)
|
|
{
|
|
dissector_add("tcp.port", TCP_PORT_COPS, dissect_cops, proto_cops);
|
|
}
|