forked from osmocom/wireshark
1771 lines
53 KiB
C
1771 lines
53 KiB
C
/* packet-clnp.c
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* Routines for ISO/OSI network and transport protocol packet disassembly
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*
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* $Id: packet-clnp.c,v 1.2 2000/04/16 09:10:53 deniel Exp $
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* Laurent Deniel <deniel@worldnet.fr>
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* Ralf Schneider <Ralf.Schneider@t-online.de>
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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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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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#include <stdio.h>
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#include <string.h>
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#include <ctype.h>
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#include <glib.h>
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#include "packet.h"
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#include "packet-osi.h"
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#include "packet-osi-options.h"
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#include "packet-clnp.h"
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#include "packet-isis.h"
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#include "packet-esis.h"
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#include "packet-h1.h"
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#include "nlpid.h"
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/* protocols and fields */
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static int proto_clnp = -1;
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static int proto_cotp = -1;
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static gint ett_clnp = -1;
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static gint ett_cotp = -1;
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static int hf_clnp_id = -1;
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static int hf_clnp_length = -1;
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static int hf_clnp_version = -1;
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static int hf_clnp_ttl = -1;
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static int hf_clnp_type = -1;
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static int hf_clnp_pdu_length = -1;
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static int hf_clnp_checksum = -1;
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static int hf_clnp_dest_length = -1;
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static int hf_clnp_dest = -1;
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static int hf_clnp_src_length = -1;
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static int hf_clnp_src = -1;
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/*
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* ISO 8473 OSI CLNP definition (see RFC994)
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*
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* _________________________________
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* | Fixed Part |
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* |_________________________________|
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* | Address Part |
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* |_________________________________|
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* | Segmentation Part (optional) |
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* |_________________________________|
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* | Options Part (optional) |
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* |_________________________________|
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* | Data (optional) |
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* |_________________________________|
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*/
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#define ISO8473_V1 0x01 /* CLNP version 1 */
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/* Fixed part */
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struct clnp_header {
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u_char cnf_proto_id; /* network layer protocol identifier */
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u_char cnf_hdr_len; /* length indicator (octets) */
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u_char cnf_vers; /* version/protocol identifier extension */
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u_char cnf_ttl; /* lifetime (500 milliseconds) */
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u_char cnf_type; /* type code */
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u_char cnf_seglen_msb; /* pdu segment length (octets) high byte */
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u_char cnf_seglen_lsb; /* pdu segment length (octets) low byte */
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u_char cnf_cksum_msb; /* checksum high byte */
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u_char cnf_cksum_lsb; /* checksum low byte */
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};
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#define CNF_TYPE 0x1f
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#define CNF_ERR_OK 0x20
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#define CNF_MORE_SEGS 0x40
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#define CNF_SEG_OK 0x80
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#define DT_NPDU 0x1C
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#define MD_NPDU 0x1D
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#define ER_NPDU 0x01
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#define ERQ_NPDU 0x1E
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#define ERP_NPDU 0x1F
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static const value_string npdu_type_vals[] = {
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{ DT_NPDU, "DT" },
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{ MD_NPDU, "MD" },
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{ ER_NPDU, "ER" },
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{ ERQ_NPDU, "ERQ" },
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{ ERP_NPDU, "ERP" },
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{ 0, NULL }
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};
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/* field position */
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#define P_ADDRESS_PART 9
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/* Segmentation part */
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struct clnp_segment {
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u_short cng_id; /* data unit identifier */
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u_short cng_off; /* segment offset */
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u_short cng_tot_len; /* total length */
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};
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/* NSAP selector */
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#define NSEL_NET 0x00
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#define NSEL_NP 0x20
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#define NSEL_TP 0x21
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/*
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* ISO8073 OSI COTP definition (see RFC905)
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*/
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/* don't use specific TPDU types to avoid alignment problems & copy overhead */
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/* TPDU definition */
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#define ED_TPDU 0x1
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#define EA_TPDU 0x2
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#define RJ_TPDU 0x5
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#define AK_TPDU 0x6
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#define ER_TPDU 0x7
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#define DR_TPDU 0x8
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#define DC_TPDU 0xC
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#define CC_TPDU 0xD
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#define CR_TPDU 0xE
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#define DT_TPDU 0xF
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/* field position */
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#define P_LI 0
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#define P_TPDU 1
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#define P_CDT 1
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#define P_DST_REF 2
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#define P_SRC_REF 4
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#define P_TPDU_NR_0_1 2
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#define P_TPDU_NR_234 4
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#define P_VAR_PART_NDT 5
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#define P_VAR_PART_EDT 8
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#define P_VAR_PART_NAK 5
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#define P_VAR_PART_CC 7
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#define P_VAR_PART_EAK 10
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#define P_VAR_PART_DC 6
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#define P_VAR_PART_DR 7
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#define P_CDT_IN_AK 8
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#define P_CDT_IN_RJ 8
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#define P_REJECT_ER 4
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#define P_REASON_IN_DR 6
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#define P_CLASS_OPTION 6
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/* TPDU length indicator */
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#define LI_NORMAL_DT_CLASS_01 2
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#define LI_NORMAL_DT_WITH_CHECKSUM 8
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#define LI_NORMAL_DT_WITHOUT_CHECKSUM 4
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#define LI_EXTENDED_DT_WITH_CHECKSUM 11
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#define LI_EXTENDED_DT_WITHOUT_CHECKSUM 7
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#define LI_NORMAL_EA_WITH_CHECKSUM 8
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#define LI_NORMAL_EA_WITHOUT_CHECKSUM 4
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#define LI_EXTENDED_EA_WITH_CHECKSUM 11
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#define LI_EXTENDED_EA_WITHOUT_CHECKSUM 7
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#define LI_NORMAL_RJ 4
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#define LI_EXTENDED_RJ 9
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#define LI_MIN_DR 6
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#define LI_MAX_DC 9
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#define LI_MAX_AK 27
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#define LI_MAX_EA 11
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#define LI_MAX_ER 8
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#define LI_DC_WITH_CHECKSUM 9
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#define LI_DC_WITHOUT_CHECKSUM 5
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#define is_LI_NORMAL_AK(p) ( p & 0x01 )
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/* variant part */
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#define VP_ACK_TIME 0x85
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#define VP_RES_ERROR 0x86
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#define VP_PRIORITY 0x87
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#define VP_TRANSIT_DEL 0x88
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#define VP_THROUGHPUT 0x89
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#define VP_SEQ_NR 0x8A /* in AK */
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#define VP_REASSIGNMENT 0x8B
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#define VP_FLOW_CNTL 0x8C /* in AK */
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#define VP_TPDU_SIZE 0xC0
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#define VP_SRC_TSAP 0xC1 /* in CR/CC */
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#define VP_DST_TSAP 0xC2
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#define VP_CHECKSUM 0xC3
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#define VP_VERSION_NR 0xC4
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#define VP_PROTECTION 0xC5
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#define VP_OPT_SEL 0xC6
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#define VP_PROTO_CLASS 0xC7
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/* misc */
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#define EXTRACT_SHORT(p) pntohs(p)
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#define EXTRACT_LONG(p) pntohl(p)
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/* global variables */
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static u_char li, tpdu, cdt; /* common fields */
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static u_short dst_ref;
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/* function definitions */
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static int osi_decode_DR(const u_char *pd, int offset,
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frame_data *fd, proto_tree *tree)
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{
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proto_tree *cotp_tree;
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proto_item *ti;
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u_short src_ref;
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u_char reason;
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char *str;
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if (li < LI_MIN_DR)
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return -1;
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src_ref = EXTRACT_SHORT(&pd[offset + P_SRC_REF]);
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reason = pd[offset + P_REASON_IN_DR];
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switch(reason) {
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case (128+0): str = "Normal Disconnect"; break;
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case (128+1): str = "Remote transport entity congestion"; break;
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case (128+2): str = "Connection negotiation failed"; break;
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case (128+3): str = "Duplicate source reference"; break;
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case (128+4): str = "Mismatched references"; break;
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case (128+5): str = "Protocol error"; break;
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case (128+7): str = "Reference overflow"; break;
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case (128+8): str = "Connection requestion refused"; break;
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case (128+10):str = "Header or parameter length invalid"; break;
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case (0): str = "Reason not specified"; break;
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case (1): str = "Congestion at TSAP"; break;
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case (2): str = "Session entity not attached to TSAP"; break;
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case (3): str = "Address unknown"; break;
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default: return -1;
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/*NOTREACHED*/
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break;
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}
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if (check_col(fd, COL_INFO))
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col_append_fstr(fd, COL_INFO, "DR TPDU src-ref: 0x%04x dst-ref: 0x%04x",
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src_ref, dst_ref);
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if (tree) {
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ti = proto_tree_add_item(tree, proto_cotp, offset, li + 1, NULL);
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cotp_tree = proto_item_add_subtree(ti, ett_cotp);
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proto_tree_add_text(cotp_tree, offset, 1,
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"Length indicator: %u", li);
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proto_tree_add_text(cotp_tree, offset + 1, 1,
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"TPDU code: 0x%x (DR)", tpdu);
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proto_tree_add_text(cotp_tree, offset + 2, 2,
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"Destination reference: 0x%04x", dst_ref);
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proto_tree_add_text(cotp_tree, offset + 4, 2,
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"Source reference: 0x%04x", src_ref);
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proto_tree_add_text(cotp_tree, offset + 6, 1,
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"Cause: %s", str);
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}
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offset += li + 1;
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dissect_data(pd, offset, fd, tree);
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return pi.captured_len; /* we dissected all of the containing PDU */
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} /* osi_decode_DR */
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/* Returns TRUE if we called a sub-dissector, FALSE if not. */
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static gboolean osi_decode_DT(const u_char *pd, int offset,
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frame_data *fd, proto_tree *tree,
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gboolean uses_inactive_subset)
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{
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proto_tree *cotp_tree;
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proto_item *ti;
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u_int tpdu_nr ;
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u_short checksum = 0;
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u_char code = 0, length = 0;
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u_int fragment = 0;
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switch (li) {
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case LI_NORMAL_DT_WITH_CHECKSUM :
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tpdu_nr = pd[offset + P_TPDU_NR_234];
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if ( tpdu_nr & 0x80 )
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tpdu_nr = tpdu_nr & 0x7F;
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else
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fragment = 1;
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code = pd[offset + P_VAR_PART_NDT];
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if (code == VP_CHECKSUM)
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checksum = EXTRACT_SHORT(&pd[offset + P_VAR_PART_NDT + 2]);
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else
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return -1;
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break;
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case LI_NORMAL_DT_WITHOUT_CHECKSUM :
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tpdu_nr = pd[offset + P_TPDU_NR_234];
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if ( tpdu_nr & 0x80 )
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tpdu_nr = tpdu_nr & 0x7F;
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else
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fragment = 1;
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break;
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case LI_EXTENDED_DT_WITH_CHECKSUM :
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tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
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if ( tpdu_nr & 0x80000000 )
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tpdu_nr = tpdu_nr & 0x7FFFFFFF;
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else
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fragment = 1;
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code = pd[offset + P_VAR_PART_EDT];
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if (code == VP_CHECKSUM)
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checksum = EXTRACT_SHORT(&pd[offset + P_VAR_PART_EDT + 2]);
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else
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return -1;
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break;
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case LI_EXTENDED_DT_WITHOUT_CHECKSUM :
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tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
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if ( tpdu_nr & 0x80000000 )
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tpdu_nr = tpdu_nr & 0x7FFFFFFF;
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else
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fragment = 1;
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break;
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case LI_NORMAL_DT_CLASS_01 :
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tpdu_nr = pd[offset + P_TPDU_NR_0_1];
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if ( tpdu_nr & 0x80 )
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tpdu_nr = tpdu_nr & 0x7F;
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else
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fragment = 1;
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break;
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default : /* bad TPDU */
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return -1;
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/*NOTREACHED*/
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break;
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}
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if (check_col(fd, COL_INFO))
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col_append_fstr(fd, COL_INFO, "DT TPDU (%u) dst-ref: 0x%04x %s",
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tpdu_nr,
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dst_ref,
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(fragment)? "(fragment)" : "");
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if (tree) {
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ti = proto_tree_add_item(tree, proto_cotp, offset, li + 1, NULL);
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cotp_tree = proto_item_add_subtree(ti, ett_cotp);
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proto_tree_add_text(cotp_tree, offset, 1,
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"Length indicator: %u", li);
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proto_tree_add_text(cotp_tree, offset + 1, 1,
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"TPDU code: 0x%x (DT)", tpdu);
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if (li != LI_NORMAL_DT_CLASS_01)
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proto_tree_add_text(cotp_tree, offset + 2, 2,
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"Destination reference: 0x%04x", dst_ref);
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switch (li) {
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case LI_NORMAL_DT_WITH_CHECKSUM :
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proto_tree_add_text(cotp_tree, offset + 4, 1,
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"TPDU number: 0x%02x (%s)",
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tpdu_nr,
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(fragment)? "fragment":"complete");
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proto_tree_add_text(cotp_tree,
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offset + P_VAR_PART_NDT, 1,
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"Parameter code: 0x%02x (checksum)", code);
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proto_tree_add_text(cotp_tree,
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offset + P_VAR_PART_NDT + 1, 1,
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"Parameter length: %u", length);
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proto_tree_add_text(cotp_tree,
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offset + P_VAR_PART_NDT + 2, length,
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"Checksum: 0x%04x", checksum);
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break;
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case LI_NORMAL_DT_WITHOUT_CHECKSUM :
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proto_tree_add_text(cotp_tree, offset + 4, 1,
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"TPDU number: 0x%02x (%s)",
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tpdu_nr,
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(fragment)? "fragment":"complete");
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break;
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case LI_EXTENDED_DT_WITH_CHECKSUM :
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proto_tree_add_text(cotp_tree, offset + 4, 4,
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"TPDU number: 0x%08x (%s)",
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tpdu_nr,
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(fragment)? "fragment":"complete");
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proto_tree_add_text(cotp_tree,
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offset + P_VAR_PART_EDT, 1,
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"Parameter code: 0x%02x (checksum)", code);
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proto_tree_add_text(cotp_tree,
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offset + P_VAR_PART_EDT + 1, 1,
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"Parameter length: %u", length);
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proto_tree_add_text(cotp_tree,
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offset + P_VAR_PART_EDT + 2, length,
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"Checksum: 0x%04x", checksum);
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break;
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case LI_EXTENDED_DT_WITHOUT_CHECKSUM :
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proto_tree_add_text(cotp_tree, offset + 4, 4,
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"TPDU number: 0x%08x (%s)",
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tpdu_nr,
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(fragment)? "fragment":"complete");
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break;
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case LI_NORMAL_DT_CLASS_01 :
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proto_tree_add_text(cotp_tree, offset + 2, 1,
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"TPDU number: 0x%02x (%s)",
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tpdu_nr,
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(fragment)? "fragment":"complete");
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break;
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}
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} /* tree */
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offset += li + 1;
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if (uses_inactive_subset){
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dissect_h1(pd, offset, fd, tree);
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return TRUE;
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}
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else {
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dissect_data(pd, offset, fd, tree);
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return FALSE;
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}
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} /* osi_decode_DT */
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static int osi_decode_ED(const u_char *pd, int offset,
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frame_data *fd, proto_tree *tree)
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{
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proto_tree *cotp_tree;
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proto_item *ti;
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u_int tpdu_nr ;
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u_short checksum = 0;
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u_char code = 0, length = 0;
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/* ED TPDUs are never fragmented */
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switch (li) {
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case LI_NORMAL_DT_WITH_CHECKSUM :
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tpdu_nr = pd[offset + P_TPDU_NR_234];
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if ( tpdu_nr & 0x80 )
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tpdu_nr = tpdu_nr & 0x7F;
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else
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return -1;
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code = pd[offset + P_VAR_PART_NDT];
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length = pd[offset + P_VAR_PART_NDT + 1];
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if (code == VP_CHECKSUM)
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checksum = EXTRACT_SHORT(&pd[offset + P_VAR_PART_NDT + 2]);
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else
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return -1;
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break;
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case LI_NORMAL_DT_WITHOUT_CHECKSUM :
|
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tpdu_nr = pd[offset + P_TPDU_NR_234];
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if ( tpdu_nr & 0x80 )
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tpdu_nr = tpdu_nr & 0x7F;
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else
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return -1;
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break;
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case LI_EXTENDED_DT_WITH_CHECKSUM :
|
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tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
|
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if ( tpdu_nr & 0x80000000 )
|
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tpdu_nr = tpdu_nr & 0x7FFFFFFF;
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else
|
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return -1;
|
|
code = pd[offset + P_VAR_PART_EDT];
|
|
length = pd[offset + P_VAR_PART_EDT + 1];
|
|
if (code == VP_CHECKSUM)
|
|
checksum = EXTRACT_SHORT(&pd[offset + P_VAR_PART_EDT + 2]);
|
|
else
|
|
return -1;
|
|
break;
|
|
case LI_EXTENDED_DT_WITHOUT_CHECKSUM :
|
|
tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
|
|
if ( tpdu_nr & 0x80000000 )
|
|
tpdu_nr = tpdu_nr & 0x7FFFFFFF;
|
|
else
|
|
return -1;
|
|
break;
|
|
default : /* bad TPDU */
|
|
return -1;
|
|
/*NOTREACHED*/
|
|
break;
|
|
} /* li */
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "ED TPDU (%u) dst-ref: 0x%04x",
|
|
tpdu_nr, dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, offset, li + 1, NULL);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, offset, 1,
|
|
"Length indicator: %u", li);
|
|
proto_tree_add_text(cotp_tree, offset + 1, 1,
|
|
"TPDU code: 0x%x (ED)", tpdu);
|
|
proto_tree_add_text(cotp_tree, offset + 2, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
|
|
switch (li) {
|
|
case LI_NORMAL_DT_WITH_CHECKSUM :
|
|
proto_tree_add_text(cotp_tree, offset + 4, 1,
|
|
"TPDU number: 0x%02x", tpdu_nr);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NDT, 1,
|
|
"Parameter code: 0x%02x (checksum)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NDT + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NDT + 2, length,
|
|
"Checksum: 0x%04x", checksum);
|
|
break;
|
|
case LI_NORMAL_DT_WITHOUT_CHECKSUM :
|
|
proto_tree_add_text(cotp_tree, offset + 4, 1,
|
|
"TPDU number: 0x%02x", tpdu_nr);
|
|
break;
|
|
case LI_EXTENDED_DT_WITH_CHECKSUM :
|
|
proto_tree_add_text(cotp_tree, offset + 4, 4,
|
|
"TPDU number: 0x%02x", tpdu_nr);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EDT, 1,
|
|
"Parameter code: 0x%02x (checksum)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EDT + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EDT + 2, length,
|
|
"Checksum: 0x%04x", checksum);
|
|
break;
|
|
case LI_EXTENDED_DT_WITHOUT_CHECKSUM :
|
|
proto_tree_add_text(cotp_tree, offset + 4, 4,
|
|
"TPDU number: 0x%02x", tpdu_nr);
|
|
break;
|
|
}
|
|
} /* tree */
|
|
|
|
offset += li + 1;
|
|
dissect_data(pd, offset, fd, tree);
|
|
|
|
return pi.captured_len; /* we dissected all of the containing PDU */
|
|
|
|
} /* osi_decode_ED */
|
|
|
|
static int osi_decode_RJ(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_tree *cotp_tree;
|
|
proto_item *ti;
|
|
u_int tpdu_nr ;
|
|
u_short credit = 0;
|
|
|
|
switch(li) {
|
|
case LI_NORMAL_RJ :
|
|
tpdu_nr = pd[offset + P_TPDU_NR_234];
|
|
break;
|
|
case LI_EXTENDED_RJ :
|
|
tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
|
|
credit = EXTRACT_SHORT(&pd[offset + P_CDT_IN_RJ]);
|
|
break;
|
|
default :
|
|
return -1;
|
|
/*NOTREACHED*/
|
|
break;
|
|
}
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "RJ TPDU (%u) dst-ref: 0x%04x",
|
|
tpdu_nr, dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, offset, li + 1, NULL);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, offset, 1,
|
|
"Length indicator: %u", li);
|
|
proto_tree_add_text(cotp_tree, offset + 1, 1,
|
|
"TPDU code: 0x%x (RJ)", tpdu);
|
|
if (li == LI_NORMAL_RJ)
|
|
proto_tree_add_text(cotp_tree, offset + 1, 1,
|
|
"Credit: %u", cdt);
|
|
proto_tree_add_text(cotp_tree, offset + 2, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
if (li == LI_NORMAL_RJ)
|
|
proto_tree_add_text(cotp_tree, offset + 4, 1,
|
|
"Your TPDU number: 0x%02x", tpdu_nr);
|
|
else {
|
|
proto_tree_add_text(cotp_tree, offset + 4, 4,
|
|
"Your TPDU number: 0x%02x", tpdu_nr);
|
|
proto_tree_add_text(cotp_tree, offset + 8, 2,
|
|
"Credit: 0x%02x", credit);
|
|
}
|
|
}
|
|
|
|
offset += li + 1;
|
|
|
|
return offset;
|
|
|
|
} /* osi_decode_RJ */
|
|
|
|
#define MAX_TSAP_LEN 32
|
|
|
|
static gchar *print_tsap(const u_char *tsap, int length)
|
|
{
|
|
|
|
static gchar str[3][MAX_TSAP_LEN * 2 + 1];
|
|
static gchar *cur;
|
|
gchar tmp[3];
|
|
gboolean allprintable;
|
|
int i;
|
|
|
|
if (cur == &str[0][0]) {
|
|
cur = &str[1][0];
|
|
} else if (cur == &str[1][0]) {
|
|
cur = &str[2][0];
|
|
} else {
|
|
cur = &str[0][0];
|
|
}
|
|
|
|
|
|
cur[0] = '\0';
|
|
if (length <= 0 || length > MAX_TSAP_LEN)
|
|
sprintf(cur, "<unsupported TSAP length>");
|
|
else {
|
|
allprintable=TRUE;
|
|
for (i=0;i<length;i++) {
|
|
if (!isprint(tsap[i])) { /* if any byte is not printable */
|
|
allprintable=FALSE; /* switch to hexdump */
|
|
break;
|
|
}
|
|
}
|
|
if (!allprintable){
|
|
strcat(cur,"0x");
|
|
}
|
|
while (length != 0) {
|
|
if (allprintable)
|
|
sprintf(tmp, "%c", *tsap ++);
|
|
else
|
|
sprintf(tmp, "%02x", *tsap ++);
|
|
strcat(cur, tmp);
|
|
length --;
|
|
}
|
|
}
|
|
return cur;
|
|
|
|
} /* print_tsap */
|
|
|
|
static int osi_decode_CC(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
|
|
/* CC & CR decoding in the same function */
|
|
|
|
proto_tree *cotp_tree = NULL;
|
|
proto_item *ti;
|
|
u_short src_ref, checksum;
|
|
u_char class_option, code, length;
|
|
u_int i = 0;
|
|
|
|
src_ref = EXTRACT_SHORT(&pd[offset + P_SRC_REF]);
|
|
class_option = (pd[offset + P_CLASS_OPTION] >> 4 ) & 0x0F;
|
|
if (class_option > 4)
|
|
return -1;
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "%s TPDU src-ref: 0x%04x dst-ref: 0x%04x",
|
|
(tpdu == CR_TPDU) ? "CR" : "CC",
|
|
src_ref,
|
|
dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, offset, li + 1, NULL);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, offset, 1,
|
|
"Length indicator: %u", li);
|
|
proto_tree_add_text(cotp_tree, offset + 1, 1,
|
|
"TPDU code: 0x%x (%s)", tpdu,
|
|
(tpdu == CR_TPDU) ? "CR" : "CC");
|
|
proto_tree_add_text(cotp_tree, offset + 2, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
proto_tree_add_text(cotp_tree, offset + 4, 2,
|
|
"Source reference: 0x%04x", src_ref);
|
|
proto_tree_add_text(cotp_tree, offset + 6, 1,
|
|
"Class option: 0x%02x", class_option);
|
|
}
|
|
|
|
if (tree)
|
|
while(li > P_VAR_PART_CC + i - 1) {
|
|
|
|
u_char c1;
|
|
u_short s, s1,s2,s3,s4;
|
|
u_int t1,t2,t3,t4;
|
|
|
|
switch( (code = pd[offset + P_VAR_PART_CC + i]) ) {
|
|
case VP_CHECKSUM :
|
|
length = pd[offset + P_VAR_PART_CC + i + 1];
|
|
checksum = EXTRACT_SHORT(&pd[offset + P_VAR_PART_CC + i + 2]);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i, 1,
|
|
"Parameter code: 0x%02x (checksum)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, length,
|
|
"Checksum: 0x%04x", checksum);
|
|
i += length + 2;
|
|
break;
|
|
case VP_SRC_TSAP :
|
|
length = pd[offset + P_VAR_PART_CC + i + 1];
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i, 1,
|
|
"Parameter code: 0x%02x (src-tsap)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, length,
|
|
"Calling TSAP: %s",
|
|
print_tsap(&pd[offset + P_VAR_PART_CC + i + 2],
|
|
length));
|
|
i += length + 2;
|
|
break;
|
|
case VP_DST_TSAP :
|
|
length = pd[offset + P_VAR_PART_CC + i + 1];
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i, 1,
|
|
"Parameter code: 0x%02x (dst-tsap)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, length,
|
|
"Called TSAP: %s",
|
|
print_tsap(&pd[offset + P_VAR_PART_CC + i + 2],
|
|
length));
|
|
i += length + 2;
|
|
break;
|
|
case VP_TPDU_SIZE :
|
|
length = pd[offset + P_VAR_PART_CC + i + 1];
|
|
c1 = pd[offset + P_VAR_PART_CC + i + 2] & 0x0F;
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i, 1,
|
|
"Parameter code: 0x%02x (tpdu-size)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, length,
|
|
"TPDU size: %u", 2 << c1);
|
|
i += length + 2;
|
|
break;
|
|
case VP_OPT_SEL :
|
|
length = pd[offset + P_VAR_PART_CC + i + 1];
|
|
c1 = pd[offset + P_VAR_PART_CC + i + 2] & 0x0F;
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i, 1,
|
|
"Parameter code: 0x%02x (options)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
if (class_option == 1) {
|
|
if (c1 & 0x8)
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, 1,
|
|
"Use of network expedited data");
|
|
else
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, 1,
|
|
"Non use of network expedited data");
|
|
if (c1 & 0x4)
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, 1,
|
|
"Use of Receipt confirmation");
|
|
else
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, 1,
|
|
"Use of explicit AK variant");
|
|
} else if (class_option == 4) {
|
|
if (c1 & 0x2)
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, 1,
|
|
"Use 16 bit checksum ");
|
|
else
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, 1,
|
|
"Non-use 16 bit checksum in class 4");
|
|
}
|
|
if (c1 & 0x1)
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, 1,
|
|
"Use of transport expedited data transfer\n");
|
|
else
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, 1,
|
|
"Non-use of transport expedited data transfer");
|
|
i += length + 2;
|
|
break;
|
|
case VP_ACK_TIME :
|
|
length = pd[offset + P_VAR_PART_CC + i + 1];
|
|
s = EXTRACT_SHORT(&pd[offset + P_VAR_PART_CC + i + 2]);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i, 1,
|
|
"Parameter code: 0x%02x (ack time)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, length,
|
|
"Ack time (ms): %u", s);
|
|
i += length + 2;
|
|
break;
|
|
case VP_THROUGHPUT :
|
|
length = pd[offset + P_VAR_PART_CC + i + 1];
|
|
t1 = EXTRACT_LONG(&pd[offset + P_VAR_PART_CC + i + 1]);
|
|
t2 = EXTRACT_LONG(&pd[offset + P_VAR_PART_CC + i + 4]);
|
|
t3 = EXTRACT_LONG(&pd[offset + P_VAR_PART_CC + i + 7]);
|
|
t4 = EXTRACT_LONG(&pd[offset + P_VAR_PART_CC + i + 10]);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i, 1,
|
|
"Parameter code: 0x%02x (throughput)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, 4,
|
|
"Target value / calling-called: %u o/s", t1);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 6, 4,
|
|
"Minimum / calling-called: %u o/s", t2);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 10, 4,
|
|
"Target value / called-calling: %u o/s", t3);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 14, 4,
|
|
"Minimum / called-calling: %u o/s", t4);
|
|
i += length + 2;
|
|
break;
|
|
case VP_TRANSIT_DEL :
|
|
length = pd[offset + P_VAR_PART_CC + i + 1];
|
|
s1 = EXTRACT_SHORT(&pd[offset + P_VAR_PART_CC + i + 2]);
|
|
s2 = EXTRACT_SHORT(&pd[offset + P_VAR_PART_CC + i + 4]);
|
|
s3 = EXTRACT_SHORT(&pd[offset + P_VAR_PART_CC + i + 6]);
|
|
s4 = EXTRACT_SHORT(&pd[offset + P_VAR_PART_CC + i + 8]);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i, 1,
|
|
"Parameter code: 0x%02x (transit delay)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, 2,
|
|
"Target value / calling-called: %u ms", s1);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 4, 2,
|
|
"Minimum / calling-called: %u ms", s2);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 6, 2,
|
|
"Target value / called-calling: %u ms", s3);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 8, 2,
|
|
"Minimum / called-calling: %u ms", s4);
|
|
i += length + 2;
|
|
break;
|
|
case VP_PRIORITY :
|
|
length = pd[offset + P_VAR_PART_CC + i + 1];
|
|
s = EXTRACT_SHORT(&pd[offset + P_VAR_PART_CC + i + 2]);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i, 1,
|
|
"Parameter code: 0x%02x (priority)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, length,
|
|
"Priority: %u", s);
|
|
i += length + 2;
|
|
break;
|
|
|
|
case VP_VERSION_NR :
|
|
length = pd[offset + P_VAR_PART_CC + i + 1];
|
|
c1 = pd[offset + P_VAR_PART_CC + i + 2];
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i, 1,
|
|
"Parameter code: 0x%02x (version)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, length,
|
|
"Version: %u", c1);
|
|
i += length + 2;
|
|
break;
|
|
|
|
case VP_REASSIGNMENT: /* todo */
|
|
case VP_RES_ERROR :
|
|
case VP_PROTECTION :
|
|
case VP_PROTO_CLASS :
|
|
default : /* no decoding */
|
|
length = pd[offset + P_VAR_PART_CC + i + 1];
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 0, 1,
|
|
"Parameter code: 0x%02x", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_CC + i + 2, length,
|
|
"Parameter value: <not shown>");
|
|
i += length + 2;
|
|
break;
|
|
}
|
|
} /* while */
|
|
|
|
offset += li + 1;
|
|
dissect_data(pd, offset, fd, tree);
|
|
|
|
return pi.captured_len; /* we dissected all of the containing PDU */
|
|
|
|
} /* osi_decode_CC */
|
|
|
|
static int osi_decode_DC(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_tree *cotp_tree;
|
|
proto_item *ti;
|
|
u_short src_ref, checksum = 0;
|
|
u_char length = 0, code = 0;
|
|
|
|
if (li > LI_MAX_DC)
|
|
return -1;
|
|
|
|
src_ref = EXTRACT_SHORT(&pd[offset + P_SRC_REF]);
|
|
|
|
switch(li) {
|
|
case LI_DC_WITHOUT_CHECKSUM :
|
|
break;
|
|
case LI_DC_WITH_CHECKSUM :
|
|
if ((code = pd[offset + P_VAR_PART_DC]) != VP_CHECKSUM)
|
|
return -1;
|
|
length = pd[offset + P_VAR_PART_DC + 1];
|
|
checksum = EXTRACT_SHORT(&pd[offset + P_VAR_PART_DC + 2]);
|
|
break;
|
|
default :
|
|
return -1;
|
|
/*NOTREACHED*/
|
|
break;
|
|
} /* li */
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "DC TPDU src-ref: 0x%04x dst-ref: 0x%04x",
|
|
src_ref,
|
|
dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, offset, li + 1, NULL);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, offset, 1,
|
|
"Length indicator: %u", li);
|
|
proto_tree_add_text(cotp_tree, offset + 1, 1,
|
|
"TPDU code: 0x%x (DC)", tpdu);
|
|
proto_tree_add_text(cotp_tree, offset + 2, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
proto_tree_add_text(cotp_tree, offset + 4, 2,
|
|
"Source reference: 0x%04x", src_ref);
|
|
if (code) {
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_DC + 0, 1,
|
|
"Parameter code: 0x%02x (checksum)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_DC + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_DC + 2, 2,
|
|
"Checksum: 0x%04x", checksum);
|
|
}
|
|
}
|
|
|
|
offset += li + 1;
|
|
|
|
return offset;
|
|
|
|
} /* osi_decode_DC */
|
|
|
|
static int osi_decode_AK(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_tree *cotp_tree = NULL;
|
|
proto_item *ti;
|
|
u_int tpdu_nr,i =0, r_lower_window_edge ;
|
|
u_short cdt_in_ak;
|
|
u_short checksum, seq_nr, r_seq_nr, r_cdt;
|
|
u_char code, length;
|
|
|
|
if (li > LI_MAX_AK)
|
|
return -1;
|
|
|
|
if (!is_LI_NORMAL_AK(li)) {
|
|
tpdu_nr = pd[offset + P_TPDU_NR_234];
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "AK TPDU (%u) dst-ref: 0x%04x",
|
|
tpdu_nr, dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, offset, li + 1, NULL);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, offset, 1,
|
|
"Length indicator: %u", li);
|
|
proto_tree_add_text(cotp_tree, offset + 1, 1,
|
|
"TPDU code: 0x%x (AK)", tpdu);
|
|
proto_tree_add_text(cotp_tree, offset + 1, 1,
|
|
"Credit: %u", cdt);
|
|
proto_tree_add_text(cotp_tree, offset + 2, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
proto_tree_add_text(cotp_tree, offset + 4, 1,
|
|
"Your TPDU number: 0x%02x", tpdu_nr);
|
|
}
|
|
|
|
while(li > P_VAR_PART_NAK + i - 1) {
|
|
switch( (code = pd[offset + P_VAR_PART_NAK + i]) ) {
|
|
case VP_CHECKSUM :
|
|
length = pd[offset + P_VAR_PART_NAK + i + 1];
|
|
checksum = EXTRACT_SHORT(&pd[offset + P_VAR_PART_NAK + i + 2]);
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 0, 1,
|
|
"Parameter code: 0x%02x (checksum)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 2, 2,
|
|
"Checksum: 0x%04x", checksum);
|
|
}
|
|
i += length + 2;
|
|
break;
|
|
case VP_FLOW_CNTL :
|
|
length = pd[offset + P_VAR_PART_NAK + i + 1];
|
|
r_lower_window_edge =
|
|
EXTRACT_LONG(&pd[offset + P_VAR_PART_NAK + i + 2]);
|
|
r_seq_nr = EXTRACT_SHORT(&pd[offset + P_VAR_PART_NAK + i + 6]);
|
|
r_cdt = EXTRACT_SHORT(&pd[offset + P_VAR_PART_NAK + i + 8]);
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 0, 1,
|
|
"Parameter code: 0x%02x (flow control)",
|
|
code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 2, 4,
|
|
"Lower window edge: 0x%08x",
|
|
r_lower_window_edge);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 6, 2,
|
|
"Sequence number: 0x%04x",
|
|
r_seq_nr);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 8, 2,
|
|
"Credit: 0x%04x",
|
|
r_cdt);
|
|
}
|
|
i += length + 2;
|
|
break;
|
|
case VP_SEQ_NR :
|
|
length = pd[offset + P_VAR_PART_NAK + i + 1];
|
|
seq_nr = EXTRACT_SHORT(&pd[offset + P_VAR_PART_NAK + i + 2]);
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 0, 1,
|
|
"Parameter code: 0x%02x (seq number)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 2, 2,
|
|
"Sequence number: 0x%04x", seq_nr);
|
|
}
|
|
i += length + 2;
|
|
break;
|
|
default :
|
|
length = pd[offset + P_VAR_PART_NAK + i + 1];
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 0, 1,
|
|
"Parameter code: 0x%02x (unknown)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_NAK + i + 2, length,
|
|
"Parameter value: <not shown>");
|
|
}
|
|
i += length + 2;
|
|
break;
|
|
} /* code */
|
|
}
|
|
} else { /* extended format */
|
|
|
|
tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
|
|
cdt_in_ak = EXTRACT_SHORT(&pd[offset + P_CDT_IN_AK]);
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "AK TPDU (%u) dst-ref: 0x%04x",
|
|
tpdu_nr, dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, offset, li + 1, NULL);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, offset, 1,
|
|
"Length indicator: %u", li);
|
|
proto_tree_add_text(cotp_tree, offset + 1, 1,
|
|
"TPDU code: 0x%x (AK)", tpdu);
|
|
proto_tree_add_text(cotp_tree, offset + 2, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
proto_tree_add_text(cotp_tree, offset + 4, 4,
|
|
"Your TPDU number: 0x%08x", tpdu_nr);
|
|
proto_tree_add_text(cotp_tree, offset + 8, 2,
|
|
"Credit: 0x%04x", cdt_in_ak);
|
|
}
|
|
|
|
while(li > P_VAR_PART_EAK + i - 1) {
|
|
switch( (code = pd[offset + P_VAR_PART_EAK + i]) ) {
|
|
case VP_CHECKSUM :
|
|
length = pd[offset + P_VAR_PART_EAK + i + 1];
|
|
checksum = EXTRACT_SHORT(&pd[offset + P_VAR_PART_EAK + i + 2]);
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 0, 1,
|
|
"Parameter code: 0x%02x (checksum)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 2, 2,
|
|
"Checksum: 0x%04x", checksum);
|
|
}
|
|
i += length + 2;
|
|
break;
|
|
case VP_FLOW_CNTL :
|
|
length = pd[offset + P_VAR_PART_EAK + i + 1];
|
|
r_lower_window_edge =
|
|
EXTRACT_LONG(&pd[offset + P_VAR_PART_EAK + i + 2]);
|
|
r_seq_nr = EXTRACT_SHORT(&pd[offset + P_VAR_PART_EAK + i + 6]);
|
|
r_cdt = EXTRACT_SHORT(&pd[offset + P_VAR_PART_EAK + i + 8]);
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 0, 1,
|
|
"Parameter code: 0x%02x (flow control)",
|
|
code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 2, 4,
|
|
"Lower window edge: 0x%08x",
|
|
r_lower_window_edge);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 6, 2,
|
|
"Sequence number: 0x%04x",
|
|
r_seq_nr);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 8, 2,
|
|
"Credit: 0x%04x",
|
|
r_cdt);
|
|
}
|
|
i += length + 2;
|
|
break;
|
|
case VP_SEQ_NR :
|
|
length = pd[offset + P_VAR_PART_EAK + i + 1];
|
|
seq_nr = EXTRACT_SHORT(&pd[offset + P_VAR_PART_EAK + i + 2]);
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 0, 1,
|
|
"Parameter code: 0x%02x (seq number)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 2, 2,
|
|
"Sequence number: 0x%04x", seq_nr);
|
|
}
|
|
i += length + 2;
|
|
break;
|
|
default :
|
|
length = pd[offset + P_VAR_PART_EAK + i + 1];
|
|
if (tree) {
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 0, 1,
|
|
"Parameter code: 0x%02x (unknown)", code);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 1, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree,
|
|
offset + P_VAR_PART_EAK + i + 2, length,
|
|
"Parameter value: <not shown>");
|
|
}
|
|
i += length + 2;
|
|
break;
|
|
} /* code */
|
|
}
|
|
|
|
} /* is_LI_NORMAL_AK */
|
|
|
|
offset += li + 1;
|
|
|
|
return offset;
|
|
|
|
} /* osi_decode_AK */
|
|
|
|
static int osi_decode_EA(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_tree *cotp_tree;
|
|
proto_item *ti;
|
|
u_int tpdu_nr ;
|
|
u_short checksum = 0;
|
|
u_char code = 0;
|
|
u_char length = 0;
|
|
|
|
if (li > LI_MAX_EA)
|
|
return -1;
|
|
|
|
switch (li) {
|
|
case LI_NORMAL_EA_WITH_CHECKSUM :
|
|
tpdu_nr = pd[offset + P_TPDU_NR_234];
|
|
code = pd[offset + P_VAR_PART_NDT];
|
|
length = pd[offset + P_VAR_PART_NDT + 1];
|
|
if (code != VP_CHECKSUM || length != 1)
|
|
return -1;
|
|
checksum = EXTRACT_SHORT(&pd[offset + P_VAR_PART_NDT + 2]);
|
|
break;
|
|
case LI_NORMAL_EA_WITHOUT_CHECKSUM :
|
|
tpdu_nr = pd[offset + P_TPDU_NR_234];
|
|
break;
|
|
case LI_EXTENDED_EA_WITH_CHECKSUM :
|
|
tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
|
|
code = pd[offset + P_VAR_PART_EDT];
|
|
length = pd[offset + P_VAR_PART_EDT + 1];
|
|
if (code != VP_CHECKSUM || length != 1)
|
|
return -1;
|
|
checksum = EXTRACT_SHORT(&pd[offset + P_VAR_PART_EDT + 2]);
|
|
break;
|
|
case LI_EXTENDED_EA_WITHOUT_CHECKSUM :
|
|
tpdu_nr = EXTRACT_LONG(&pd[offset + P_TPDU_NR_234]);
|
|
break;
|
|
default : /* bad TPDU */
|
|
return -1;
|
|
/*NOTREACHED*/
|
|
break;
|
|
} /* li */
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO,
|
|
"EA TPDU (%u) dst-ref: 0x%04x", tpdu_nr, dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, offset, li + 1, NULL);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, offset, 1,
|
|
"Length indicator: %u", li);
|
|
proto_tree_add_text(cotp_tree, offset + 1, 1,
|
|
"TPDU code: 0x%x (EA)", tpdu);
|
|
proto_tree_add_text(cotp_tree, offset + 2, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
|
|
switch (li) {
|
|
case LI_NORMAL_EA_WITH_CHECKSUM :
|
|
proto_tree_add_text(cotp_tree, offset + 4, 1,
|
|
"Your TPDU number: 0x%02x", tpdu_nr);
|
|
proto_tree_add_text(cotp_tree, offset + 5, 1,
|
|
"Parameter code: 0x%02x (checksum)", code);
|
|
proto_tree_add_text(cotp_tree, offset + 6, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree, offset + 7, 2,
|
|
"Checksum: 0x%04x", checksum);
|
|
break;
|
|
case LI_NORMAL_EA_WITHOUT_CHECKSUM :
|
|
proto_tree_add_text(cotp_tree, offset + 4, 1,
|
|
"Your TPDU number: 0x%02x", tpdu_nr);
|
|
break;
|
|
case LI_EXTENDED_EA_WITH_CHECKSUM :
|
|
proto_tree_add_text(cotp_tree, offset + 4, 4,
|
|
"Your TPDU number: 0x%08x", tpdu_nr);
|
|
proto_tree_add_text(cotp_tree, offset + 8, 1,
|
|
"Parameter code: 0x%02x (checksum)", code);
|
|
proto_tree_add_text(cotp_tree, offset + 9, 1,
|
|
"Parameter length: %u", length);
|
|
proto_tree_add_text(cotp_tree, offset + 10, 2,
|
|
"Checksum: 0x%04x", checksum);
|
|
break;
|
|
case LI_EXTENDED_EA_WITHOUT_CHECKSUM :
|
|
proto_tree_add_text(cotp_tree, offset + 4, 4,
|
|
"Your TPDU number: 0x%08x", tpdu_nr);
|
|
break;
|
|
default :
|
|
break;
|
|
} /* li */
|
|
} /* tree */
|
|
|
|
offset += li + 1;
|
|
|
|
return offset;
|
|
|
|
} /* osi_decode_EA */
|
|
|
|
static int osi_decode_ER(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree)
|
|
{
|
|
proto_tree *cotp_tree;
|
|
proto_item *ti;
|
|
u_char *str;
|
|
|
|
if (li > LI_MAX_ER)
|
|
return -1;
|
|
|
|
switch(pd[offset + P_REJECT_ER]) {
|
|
case 0 :
|
|
str = "Reason not specified";
|
|
break;
|
|
case 1 :
|
|
str = "Invalid parameter code";
|
|
break;
|
|
case 2 :
|
|
str = "Invalid TPDU type";
|
|
break;
|
|
case 3 :
|
|
str = "Invalid parameter value";
|
|
break;
|
|
default:
|
|
return -1;
|
|
/*NOTREACHED*/
|
|
break;
|
|
}
|
|
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "ER TPDU dst-ref: 0x%04x", dst_ref);
|
|
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_cotp, offset, li + 1, NULL);
|
|
cotp_tree = proto_item_add_subtree(ti, ett_cotp);
|
|
proto_tree_add_text(cotp_tree, offset, 1,
|
|
"Length indicator: %u", li);
|
|
proto_tree_add_text(cotp_tree, offset + 1, 1,
|
|
"TPDU code: 0x%x (ER)", tpdu);
|
|
proto_tree_add_text(cotp_tree, offset + 2, 2,
|
|
"Destination reference: 0x%04x", dst_ref);
|
|
proto_tree_add_text(cotp_tree, offset + 4, 1,
|
|
"Reject cause: %s", str);
|
|
}
|
|
|
|
offset += li + 1;
|
|
|
|
return offset;
|
|
|
|
} /* osi_decode_ER */
|
|
|
|
/* Returns TRUE if we found at least one valid COTP PDU, FALSE
|
|
otherwise. */
|
|
static gboolean dissect_cotp_internal(const u_char *pd, int offset,
|
|
frame_data *fd, proto_tree *tree,
|
|
gboolean uses_inactive_subset)
|
|
{
|
|
gboolean first_tpdu = TRUE;
|
|
int new_offset;
|
|
gboolean found_cotp = FALSE;
|
|
gboolean subdissector_found = FALSE;
|
|
|
|
/* Initialize the COL_INFO field; each of the TPDUs will have its
|
|
information appended. */
|
|
if (check_col(fd, COL_INFO))
|
|
col_add_str(fd, COL_INFO, "");
|
|
|
|
while (IS_DATA_IN_FRAME(offset)) {
|
|
if (!first_tpdu) {
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_str(fd, COL_INFO, ", ");
|
|
}
|
|
if ((li = pd[offset + P_LI]) == 0) {
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_str(fd, COL_INFO, "Length indicator is zero");
|
|
if (!first_tpdu)
|
|
dissect_data(pd, offset, fd, tree);
|
|
return found_cotp;
|
|
}
|
|
if (!BYTES_ARE_IN_FRAME(offset, P_LI + li + 1)) {
|
|
if (check_col(fd, COL_INFO))
|
|
col_append_str(fd, COL_INFO, "Captured data in frame doesn't include entire frame");
|
|
if (!first_tpdu)
|
|
dissect_data(pd, offset, fd, tree);
|
|
return found_cotp;
|
|
}
|
|
|
|
tpdu = (pd[offset + P_TPDU] >> 4) & 0x0F;
|
|
cdt = pd[offset + P_CDT] & 0x0F;
|
|
dst_ref = EXTRACT_SHORT(&pd[offset + P_DST_REF]);
|
|
|
|
switch (tpdu) {
|
|
case CC_TPDU :
|
|
case CR_TPDU :
|
|
new_offset = osi_decode_CC(pd, offset, fd, tree);
|
|
break;
|
|
case DR_TPDU :
|
|
new_offset = osi_decode_DR(pd, offset, fd, tree);
|
|
break;
|
|
case DT_TPDU :
|
|
if (osi_decode_DT(pd, offset, fd, tree, uses_inactive_subset))
|
|
subdissector_found = TRUE;
|
|
new_offset = pi.captured_len; /* DT PDUs run to the end of the packet */
|
|
break;
|
|
case ED_TPDU :
|
|
new_offset = osi_decode_ED(pd, offset, fd, tree);
|
|
break;
|
|
case RJ_TPDU :
|
|
new_offset = osi_decode_RJ(pd, offset, fd, tree);
|
|
break;
|
|
case DC_TPDU :
|
|
new_offset = osi_decode_DC(pd, offset, fd, tree);
|
|
break;
|
|
case AK_TPDU :
|
|
new_offset = osi_decode_AK(pd, offset, fd, tree);
|
|
break;
|
|
case EA_TPDU :
|
|
new_offset = osi_decode_EA(pd, offset, fd, tree);
|
|
break;
|
|
case ER_TPDU :
|
|
new_offset = osi_decode_ER(pd, offset, fd, tree);
|
|
break;
|
|
default :
|
|
if (first_tpdu && check_col(fd, COL_INFO))
|
|
col_append_fstr(fd, COL_INFO, "Unknown TPDU type (0x%x)", tpdu);
|
|
new_offset = -1; /* bad PDU type */
|
|
break;
|
|
}
|
|
|
|
if (new_offset == -1) { /* incorrect TPDU */
|
|
if (!first_tpdu)
|
|
dissect_data(pd, offset, fd, tree);
|
|
break;
|
|
}
|
|
|
|
if (first_tpdu) {
|
|
/* Well, we found at least one valid COTP PDU, so I guess this
|
|
is COTP. */
|
|
if (!subdissector_found && check_col(fd, COL_PROTOCOL))
|
|
col_add_str(fd, COL_PROTOCOL, "COTP");
|
|
found_cotp = TRUE;
|
|
}
|
|
|
|
offset = new_offset;
|
|
first_tpdu = FALSE;
|
|
}
|
|
return found_cotp;
|
|
} /* dissect_cotp_internal */
|
|
|
|
void dissect_cotp(const u_char *pd, int offset, frame_data *fd,
|
|
proto_tree *tree)
|
|
{
|
|
if (!dissect_cotp_internal(pd, offset, fd, tree, FALSE))
|
|
dissect_data(pd, offset, fd, tree);
|
|
}
|
|
|
|
|
|
/*
|
|
* CLNP part / main entry point
|
|
*/
|
|
|
|
void dissect_clnp(const u_char *pd, int offset, frame_data *fd,
|
|
proto_tree *tree)
|
|
{
|
|
|
|
struct clnp_header clnp;
|
|
proto_tree *clnp_tree = NULL;
|
|
proto_item *ti;
|
|
u_char src_len, dst_len, nsel, opt_len = 0;
|
|
u_int first_offset = offset;
|
|
char flag_string[6+1];
|
|
char *pdu_type_string;
|
|
guint16 segment_length;
|
|
guint16 segment_offset = 0;
|
|
guint len;
|
|
|
|
if (check_col(fd, COL_PROTOCOL))
|
|
col_add_str(fd, COL_PROTOCOL, "CLNP");
|
|
|
|
/* avoid alignment problem */
|
|
memcpy(&clnp, &pd[offset], sizeof(clnp));
|
|
|
|
if (clnp.cnf_proto_id == NLPID_NULL) {
|
|
if (check_col(fd, COL_INFO))
|
|
col_add_str(fd, COL_INFO, "Inactive subset");
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_clnp, offset, 1, NULL);
|
|
clnp_tree = proto_item_add_subtree(ti, ett_clnp);
|
|
proto_tree_add_uint_format(clnp_tree, hf_clnp_id, offset, 1,
|
|
clnp.cnf_proto_id,
|
|
"Inactive subset");
|
|
}
|
|
dissect_cotp_internal(pd, offset+1, fd, tree, TRUE);
|
|
return;
|
|
}
|
|
|
|
if (!BYTES_ARE_IN_FRAME(offset, sizeof(clnp))) {
|
|
dissect_data(pd, offset, fd, tree);
|
|
return;
|
|
}
|
|
|
|
/* return if version not known */
|
|
if (clnp.cnf_vers != ISO8473_V1) {
|
|
dissect_data(pd, offset, fd, tree);
|
|
return;
|
|
}
|
|
|
|
/* fixed part decoding */
|
|
opt_len = clnp.cnf_hdr_len;
|
|
|
|
segment_length = EXTRACT_SHORT(&clnp.cnf_seglen_msb);
|
|
flag_string[0] = '\0';
|
|
if (clnp.cnf_type & CNF_SEG_OK)
|
|
strcat(flag_string, "S ");
|
|
if (clnp.cnf_type & CNF_MORE_SEGS)
|
|
strcat(flag_string, "M ");
|
|
if (clnp.cnf_type & CNF_ERR_OK)
|
|
strcat(flag_string, "E ");
|
|
pdu_type_string = val_to_str(clnp.cnf_type & CNF_TYPE, npdu_type_vals,
|
|
"Unknown (0x%02x)");
|
|
if (tree) {
|
|
ti = proto_tree_add_item(tree, proto_clnp, offset, clnp.cnf_hdr_len, NULL);
|
|
clnp_tree = proto_item_add_subtree(ti, ett_clnp);
|
|
proto_tree_add_item(clnp_tree, hf_clnp_id, offset, 1,
|
|
clnp.cnf_proto_id);
|
|
proto_tree_add_item(clnp_tree, hf_clnp_length, offset + 1, 1,
|
|
clnp.cnf_hdr_len);
|
|
proto_tree_add_item(clnp_tree, hf_clnp_version, offset + 2, 1,
|
|
clnp.cnf_vers);
|
|
proto_tree_add_uint_format(clnp_tree, hf_clnp_ttl, offset + 3, 1,
|
|
clnp.cnf_ttl,
|
|
"Holding Time : %u (%u secs)",
|
|
clnp.cnf_ttl, clnp.cnf_ttl / 2);
|
|
proto_tree_add_uint_format(clnp_tree, hf_clnp_type, offset + 4, 1,
|
|
clnp.cnf_type,
|
|
"PDU Type : 0x%02x (%s%s)",
|
|
clnp.cnf_type,
|
|
flag_string,
|
|
pdu_type_string);
|
|
proto_tree_add_item(clnp_tree, hf_clnp_pdu_length, offset + 5, 2,
|
|
segment_length);
|
|
proto_tree_add_uint_format(clnp_tree, hf_clnp_checksum, offset + 7, 2,
|
|
EXTRACT_SHORT(&clnp.cnf_cksum_msb),
|
|
"Checksum : 0x%04x",
|
|
EXTRACT_SHORT(&clnp.cnf_cksum_msb));
|
|
opt_len -= 9; /* Fixed part of Hesder */
|
|
} /* tree */
|
|
|
|
/* stop here if header is not complete */
|
|
|
|
if (!BYTES_ARE_IN_FRAME(offset, clnp.cnf_hdr_len)) {
|
|
if (check_col(fd, COL_INFO))
|
|
col_add_fstr(fd, COL_INFO, "%s NPDU %s", pdu_type_string, flag_string);
|
|
dissect_data(pd, offset, fd, tree);
|
|
return;
|
|
}
|
|
|
|
/* address part */
|
|
|
|
offset += P_ADDRESS_PART;
|
|
dst_len = pd[offset];
|
|
nsel = pd[offset + dst_len];
|
|
src_len = pd[offset + dst_len + 1];
|
|
|
|
if (tree) {
|
|
proto_tree_add_item(clnp_tree, hf_clnp_dest_length, offset, 1,
|
|
dst_len);
|
|
proto_tree_add_bytes_format(clnp_tree, hf_clnp_dest, offset + 1 , dst_len,
|
|
&pd[offset + 1],
|
|
" DA : %s",
|
|
print_nsap_net(&pd[offset + 1], dst_len));
|
|
proto_tree_add_item(clnp_tree, hf_clnp_src_length,
|
|
offset + 1 + dst_len, 1, src_len);
|
|
proto_tree_add_bytes_format(clnp_tree, hf_clnp_src,
|
|
offset + dst_len + 2, src_len,
|
|
&pd[offset + dst_len + 2],
|
|
" SA : %s",
|
|
print_nsap_net(&pd[offset + dst_len + 2], src_len));
|
|
|
|
opt_len -= dst_len + src_len +2;
|
|
}
|
|
|
|
if (check_col(fd, COL_RES_NET_SRC))
|
|
col_add_fstr(fd, COL_RES_NET_SRC, "%s",
|
|
print_nsap_net(&pd[offset + dst_len + 2], src_len));
|
|
if (check_col(fd, COL_RES_NET_DST))
|
|
col_add_fstr(fd, COL_RES_NET_DST, "%s",
|
|
print_nsap_net(&pd[offset + 1], dst_len));
|
|
|
|
/* Segmentation Part */
|
|
|
|
offset += dst_len + src_len + 2;
|
|
|
|
if (clnp.cnf_type & CNF_SEG_OK) {
|
|
struct clnp_segment seg; /* XXX - not used */
|
|
memcpy(&seg, &pd[offset], sizeof(seg)); /* XXX - not used */
|
|
|
|
segment_offset = EXTRACT_SHORT(&pd[offset + 2]);
|
|
if (tree) {
|
|
proto_tree_add_text(clnp_tree, offset, 2,
|
|
"Data unit identifier: %06u",
|
|
EXTRACT_SHORT(&pd[offset]));
|
|
proto_tree_add_text(clnp_tree, offset + 2 , 2,
|
|
"Segment offset : %6u",
|
|
segment_offset);
|
|
proto_tree_add_text(clnp_tree, offset + 4 , 2,
|
|
"Total length : %6u",
|
|
EXTRACT_SHORT(&pd[offset + 4]));
|
|
}
|
|
|
|
offset += 6;
|
|
opt_len -= 6;
|
|
}
|
|
|
|
if (tree) {
|
|
/* To do : decode options */
|
|
/*
|
|
proto_tree_add_text(clnp_tree, offset,
|
|
clnp.cnf_hdr_len + first_offset - offset,
|
|
"Options/Data: <not shown>");
|
|
*/
|
|
/* QUICK HACK Option Len:= PDU_Hd_length-( FixedPart+AddresPart+SegmentPart )*/
|
|
|
|
dissect_osi_options( 0xff,
|
|
opt_len,
|
|
pd, offset, fd, clnp_tree );
|
|
}
|
|
|
|
/* Length of CLNP datagram plus headers above it. */
|
|
len = segment_length + first_offset;
|
|
|
|
/* Set the payload and captured-payload lengths to the minima of (the
|
|
datagram length plus the length of the headers above it) and the
|
|
frame lengths. */
|
|
if (pi.len > len)
|
|
pi.len = len;
|
|
if (pi.captured_len > len)
|
|
pi.captured_len = len;
|
|
|
|
offset = first_offset + clnp.cnf_hdr_len;
|
|
|
|
/* For now, dissect the payload of segments other than the initial
|
|
segment as data, rather than handing them off to the transport
|
|
protocol, just as we do with fragments other than the first
|
|
fragment in a fragmented IP datagram; in the future, we will
|
|
probably reassemble fragments for IP, and may reassemble segments
|
|
for CLNP. */
|
|
if ((clnp.cnf_type & CNF_SEG_OK) && segment_offset != 0) {
|
|
if (check_col(fd, COL_INFO))
|
|
col_add_fstr(fd, COL_INFO, "Fragmented %s NPDU %s(off=%u)",
|
|
pdu_type_string, flag_string, segment_offset);
|
|
dissect_data(pd, offset, fd, tree);
|
|
return;
|
|
}
|
|
|
|
if (IS_DATA_IN_FRAME(offset)) {
|
|
switch (clnp.cnf_type & CNF_TYPE) {
|
|
|
|
case DT_NPDU:
|
|
case MD_NPDU:
|
|
/* Continue with COTP if any data.
|
|
XXX - if this isn't the first Derived PDU of a segmented Initial
|
|
PDU, skip that? */
|
|
|
|
if (nsel == NSEL_TP) { /* just guessing here - valid for DECNet-OSI */
|
|
if (dissect_cotp_internal(pd, offset, fd, tree, FALSE))
|
|
return; /* yes, it appears to be COTP */
|
|
}
|
|
break;
|
|
|
|
case ER_NPDU:
|
|
/* The payload is the header and "none, some, or all of the data
|
|
part of the discarded PDU", i.e. it's like an ICMP error;
|
|
just as we don't yet trust ourselves to be able to dissect
|
|
the payload of an ICMP error packet, we don't yet trust
|
|
ourselves to dissect the payload of a CLNP ER packet. */
|
|
break;
|
|
|
|
case ERQ_NPDU:
|
|
case ERP_NPDU:
|
|
/* XXX - dissect this */
|
|
break;
|
|
}
|
|
}
|
|
if (check_col(fd, COL_INFO))
|
|
col_add_fstr(fd, COL_INFO, "%s NPDU %s", pdu_type_string, flag_string);
|
|
dissect_data(pd, offset, fd, tree);
|
|
|
|
} /* dissect_clnp */
|
|
|
|
|
|
void proto_register_clnp(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_clnp_id,
|
|
{ "Network Layer Protocol Identifier", "clnp.nlpi", FT_UINT8, BASE_HEX,
|
|
VALS(nlpid_vals), 0x0, "" }},
|
|
|
|
{ &hf_clnp_length,
|
|
{ "HDR Length ", "clnp.len", FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_version,
|
|
{ "Version ", "clnp.version", FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_ttl,
|
|
{ "Holding Time ", "clnp.ttl", FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_type,
|
|
{ "PDU Type ", "clnp.type", FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_pdu_length,
|
|
{ "PDU length ", "clnp.pdu.len", FT_UINT16, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_checksum,
|
|
{ "Checksum ", "clnp.checksum", FT_UINT16, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_dest_length,
|
|
{ "DAL ", "clnp.dsap.len", FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_dest,
|
|
{ " DA ", "clnp.dsap", FT_BYTES, BASE_NONE, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_src_length,
|
|
{ "SAL ", "clnp.ssap.len", FT_UINT8, BASE_DEC, NULL, 0x0, "" }},
|
|
|
|
{ &hf_clnp_src,
|
|
{ " SA ", "clnp.ssap", FT_BYTES, BASE_NONE, NULL, 0x0, "" }},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_clnp,
|
|
};
|
|
|
|
proto_clnp = proto_register_protocol(PROTO_STRING_CLNP, "clnp");
|
|
proto_register_field_array(proto_clnp, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void proto_register_cotp(void)
|
|
{
|
|
/* static hf_register_info hf[] = {
|
|
{ &variable,
|
|
{ "Name", "cotp.abbreviation", TYPE, VALS_POINTER }},
|
|
};*/
|
|
static gint *ett[] = {
|
|
&ett_cotp,
|
|
};
|
|
|
|
proto_cotp = proto_register_protocol(PROTO_STRING_COTP, "cotp");
|
|
/* proto_register_field_array(proto_cotp, hf, array_length(hf));*/
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|