forked from osmocom/wireshark
6beaa5ce81
svn path=/trunk/; revision=16234
1301 lines
39 KiB
C
1301 lines
39 KiB
C
/* packet-dcm.c
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* Routines for DICOM dissection
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* Copyright 2003, Rich Coe <Richard.Coe@med.ge.com>
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*
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* DICOM communication protocol
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* http://medical.nema.org/dicom/2003.html
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* DICOM Part 8: Network Communication Support for Message Exchange
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*
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* (NOTE: you need to turn on 'Allow subdissector to desegment TCP streams'
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* in Preferences/Protocols/TCP Option menu, in order to view
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* DICOM packets correctly.
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* Also, you might have to turn off tcp.check_checksum if tcp
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* detects that the checksum is bad - for example, if you're
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* capturing on a network interface that does TCP checksum
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* offloading and you're capturing outgoing packets.
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* This should probably be documented somewhere besides here.)
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*
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* $Id$
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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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* 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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/* Notes:
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* This is my first pass at a Ethereal dissector to display
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* DICOM (Digital Imaging and Communications in Medicine) packets.
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*
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* - It currently displays most of the DICOM packets.
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*
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* - I've used it to debug Query/Retrieve, Storage, and Echo protocols.
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*
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* - Not all DICOM tags are currently displayed symbolically.
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* Unknown tags are displayed as '(unknown)'
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* More known tags might be added in the future.
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* If the tag data contains a string, it will be displayed.
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* Even if the tag contains Explicit VR, it is not currently used to
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* symbolically display the data. Consider this a future enhancement.
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*
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* - If the DATA PDU has the 'more' bit set, subsequent packets will
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* not currently display. Finding out how much 'more' data is coming
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* currently requires parsing the entire packet.
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*
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* - The 'value to string' routines should probably be hash lookups.
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*
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* 9 Nov 2004
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* - Fixed the heuristic code -- sometimes a conversation already exists
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* - Fixed the dissect code to display all the tags in the pdu
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*
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* 28 Apr 2005
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* - fix memory leak when Assoc packet is processed repeatedly in ethereal
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*
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* - removed unused partial packet flag
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*
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* - added better support for DICOM VR
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* - sequences
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* - report actual VR in packet display, if supplied by xfer syntax
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* - show that we are not displaying entire tag string with '[...]',
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* some tags can hold up to 2^32-1 chars
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*
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* - remove my goofy attempt at trying to get access to the fragmented packets
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* (anyone have an idea on how to fix this ???)
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*
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* - process all the data in the Assoc packet even if display is off
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*
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* - limit display of data in Assoc packet to defined size of the data even
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* if reported size is larger
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*
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* - show the last tag in a packet as [incomplete] if we don't have all the data
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*
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* - added framework for reporting DICOM async negotiation (not finished)
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* (I'm not aware of an implementation which currently supports this)
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*
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* - still need to fix display of continuation packets
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*/
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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 <ctype.h>
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#include <glib.h>
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#include "isprint.h"
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#include <epan/packet.h>
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#include <epan/emem.h>
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#include <epan/strutil.h>
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#include <epan/conversation.h>
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#include <epan/emem.h>
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#include "packet-tcp.h"
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/* Initialize the protocol and registered fields */
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static int proto_dcm = -1;
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static int hf_dcm_pdu = -1,
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hf_dcm_pdu_len = -1,
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hf_dcm_pdu_type = -1,
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hf_dcm_pdi = -1,
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hf_dcm_pdi_name = -1,
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hf_dcm_pdi_syntax = -1,
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hf_dcm_pctxt = -1,
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hf_dcm_pcres = -1,
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hf_dcm_pdu_maxlen = -1,
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hf_dcm_impl = -1,
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hf_dcm_vers = -1,
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hf_dcm_async = -1,
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hf_dcm_data_len = -1,
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hf_dcm_data_ctx = -1,
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hf_dcm_data_flags = -1,
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hf_dcm_data_tag = -1;
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/* Initialize the subtree pointers */
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static gint ett_dcm = -1, ett_assoc = -1, ett_dcm_data = -1;
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static const value_string dcm_pdu_ids[] = {
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{ 1, "ASSOC Request" },
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{ 2, "ASSOC Accept" },
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{ 3, "ASSOC Reject" },
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{ 4, "Data" },
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{ 5, "RELEASE Request" },
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{ 6, "RELEASE Response" },
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{ 7, "ABORT" },
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{ 0, NULL }
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};
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static const value_string dcm_pdi_ids[] = {
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{ 0x10, "Application Context" },
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{ 0x20, "Presentation Context" },
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{ 0x21, "Presentation Context Reply" },
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{ 0x30, "Abstract syntax" },
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{ 0x40, "Transfer syntax" },
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{ 0x50, "User Info" },
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{ 0x51, "Max Length" },
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{ 0, NULL }
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};
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struct dcmContext {
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guint8 id;
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guint8 result;
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};
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struct dcmItem {
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struct dcmItem *next, *prev;
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int valid;
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guint8 id; /* 0x20 Presentation Context */
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const guint8 *abs; /* 0x30 Abstract syntax */
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char *xfer; /* 0x40 Transfer syntax */
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guint8 syntax;
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#define DCM_ILE 0x01 /* implicit, little endian */
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#define DCM_EBE 0x02 /* explicit, big endian */
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#define DCM_ELE 0x03 /* explicit, little endian */
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#define DCM_UNK 0xf0
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};
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typedef struct dcmItem dcmItem_t;
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struct dcmState {
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dcmItem_t *first, *last;
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guint8 pdu; /* protocol data unit */
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guint32 tlen, clen, rlen; /* length: total, current, remaining */
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int coff; /* current offset */
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int valid; /* this conversation is a dicom conversation */
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/* enum { DCM_NONE, DCM_ASSOC, DCM_ }; */
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#define AEEND 16
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guint8 orig[1+AEEND], targ[1+AEEND], resp[1+AEEND], source, result, reason;
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};
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typedef struct dcmState dcmState_t;
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struct dcmTag {
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int tag;
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int dtype;
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const char *desc;
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#define DCM_TSTR 1
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#define DCM_TINT2 2
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#define DCM_TINT4 3
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#define DCM_TFLT 4
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#define DCM_TDBL 5
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#define DCM_TSTAT 6 /* call dcm_rsp2str() on TINT2 */
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#define DCM_TRET 7
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#define DCM_TCMD 8
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#define DCM_SQ 9 /* sequence */
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#define DCM_OTH 10 /* other */
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};
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typedef struct dcmTag dcmTag_t;
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static GHashTable *dcm_tagTable = NULL;
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dcmItem_t * lookupCtx(dcmState_t *dd, guint8 ctx);
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static dcmTag_t tagData[] = {
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{ 0x1, DCM_TRET, "(Ret) Length to End" },
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{ 0x2, DCM_TSTR, "Affected Class" },
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{ 0x3, DCM_TSTR, "Requested Class" },
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{ 0x0010, DCM_TRET, "(Ret) Recognition Code" },
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{ 0x0100, DCM_TCMD, "Command Field" },
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{ 0x0110, DCM_TINT2, "Message ID" },
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{ 0x0120, DCM_TINT2, "Resp Message ID" },
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{ 0x0200, DCM_TRET, "(Ret) Initiator" },
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{ 0x0300, DCM_TRET, "(Ret) Reciever" },
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{ 0x0400, DCM_TRET, "(Ret) Find Location" },
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{ 0x0600, DCM_TSTR, "Dest AE" },
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{ 0x0700, DCM_TINT2, "Priority" },
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{ 0x0800, DCM_TINT2, "Data Set (0x0101 means no data set present)" },
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{ 0x0850, DCM_TRET, "(Ret) Num Matches" },
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{ 0x0860, DCM_TRET, "(Ret) Resp Seq Num" },
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{ 0x0900, DCM_TSTAT, "Status" },
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{ 0x0901, DCM_TSTR, "Offending elm(s)" },
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{ 0x0902, DCM_TSTR, "Error Comment" },
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{ 0x0903, DCM_TINT2, "Error Id" },
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{ 0x1000, DCM_TSTR, "Affected Instance UID" },
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{ 0x1001, DCM_TSTR, "Requested Instance UID" },
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{ 0x1002, DCM_TINT2, "Event Type Id" },
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{ 0x1005, DCM_TSTR, "Attr Id List" },
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{ 0x1008, DCM_TINT2, "Action Type Id" },
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{ 0x1020, DCM_TINT2, "Num Remaining Ops" },
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{ 0x1021, DCM_TINT2, "Num Completed Ops" },
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{ 0x1022, DCM_TINT2, "Num Failed Ops" },
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{ 0x1023, DCM_TINT2, "Num Warning Ops" },
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{ 0x1030, DCM_TSTR, "Move Orig AE" },
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{ 0x1031, DCM_TINT2, "Move Orig Id" },
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{ 0x4000, DCM_TRET, "(Ret) DIALOG Recv'r" },
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{ 0x4010, DCM_TRET, "(Ret) Terminal Type" },
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{ 0x5010, DCM_TRET, "(Ret) Msg Set ID" },
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{ 0x5020, DCM_TRET, "(Ret) End Msg ID" },
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{ 0x5110, DCM_TRET, "(Ret) Display Fmt" },
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{ 0x5120, DCM_TRET, "(Ret) Page Position ID" },
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{ 0x5130, DCM_TRET, "(Ret) Text Fmt ID" },
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{ 0x5140, DCM_TRET, "(Ret) Nor/Rev" },
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{ 0x5150, DCM_TRET, "(Ret) Add Gray Scale" },
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{ 0x5160, DCM_TRET, "(Ret) Borders" },
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{ 0x5170, DCM_TRET, "(Ret) Copies" },
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{ 0x5180, DCM_TRET, "(Ret) Mag Type" },
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{ 0x5190, DCM_TRET, "(Ret) Erase" },
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{ 0x51a0, DCM_TRET, "(Ret) Print" },
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{ 0x080018, DCM_TSTR, "Image UID" },
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{ 0x080020, DCM_TSTR, "Study Date" },
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{ 0x080030, DCM_TSTR, "Study Time" },
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{ 0x080050, DCM_TSTR, "Acc Num" },
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{ 0x080052, DCM_TSTR, "Q/R Level" },
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{ 0x080054, DCM_TSTR, "Retrieve AE" },
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{ 0x080060, DCM_TSTR, "Modality" },
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{ 0x080070, DCM_TSTR, "Manuf" },
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{ 0x081030, DCM_TSTR, "Study Desc" },
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{ 0x08103e, DCM_TSTR, "Series Desc" },
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{ 0x100010, DCM_TSTR, "Patient Name" },
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{ 0x100020, DCM_TSTR, "Patient Id" },
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{ 0x20000d, DCM_TSTR, "Study UID" },
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{ 0x20000e, DCM_TSTR, "Series UID" },
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{ 0x200010, DCM_TSTR, "Study Num" },
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{ 0x200011, DCM_TSTR, "Series Num" },
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{ 0x200012, DCM_TSTR, "Acq Num" },
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{ 0x200013, DCM_TSTR, "Image Num" },
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{ 0x7fe00010, DCM_OTH, "Pixels" },
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{ 0xfffee000, DCM_TRET, "Item Begin" },
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{ 0xfffee00d, DCM_TRET, "Item End" },
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{ 0xfffee0dd, DCM_TRET, "Sequence End" },
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};
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static void
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dcm_init(void)
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{
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if (NULL == dcm_tagTable) {
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unsigned int i;
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dcm_tagTable = g_hash_table_new(NULL, NULL);
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for (i = 0; i < sizeof(tagData) / sizeof(dcmTag_t); i++)
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g_hash_table_insert(dcm_tagTable, GINT_TO_POINTER(tagData[i].tag),
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(gpointer) (tagData+i));
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}
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}
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static dcmState_t *
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mkds(void)
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{
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dcmState_t *ds;
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if (NULL == (ds = (dcmState_t *) g_malloc(sizeof(dcmState_t)))) {
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return NULL;
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}
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ds->pdu = 0;
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ds->tlen = ds->rlen = 0;
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ds->valid = TRUE;
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memset(ds->orig, 0, sizeof(ds->orig));
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memset(ds->targ, 0, sizeof(ds->targ));
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memset(ds->resp, 0, sizeof(ds->resp));
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ds->first = ds->last = NULL;
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return ds;
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}
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static const char *
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dcm_pdu2str(guint8 item)
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{
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const char *s = "";
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switch (item) {
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case 1: s = "ASSOC Request"; break;
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case 2: s = "ASSOC Accept"; break;
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case 3: s = "ASSOC Reject"; break;
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case 4: s = "Data"; break;
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case 5: s = "RELEASE Request"; break;
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case 6: s = "RELEASE Response"; break;
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case 7: s = "ABORT"; break;
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case 0x10: s = "Application Context"; break;
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case 0x20: s = "Presentation Context"; break;
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case 0x21: s = "Presentation Context Reply"; break;
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case 0x30: s = "Abstract syntax"; break;
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case 0x40: s = "Transfer syntax"; break;
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case 0x50: s = "User Info"; break;
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case 0x51: s = "Max Length"; break;
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default: break;
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}
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return s;
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}
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static const char *
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dcm_result2str(guint8 result)
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{
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const char *s = "";
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switch (result) {
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case 1: s = "Reject Permanent"; break;
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case 2: s = "Reject Transient"; break;
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default: break;
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}
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return s;
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}
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static const char *
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dcm_source2str(guint8 source)
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{
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const char *s = "";
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switch (source) {
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case 1: s = "User"; break;
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case 2: s = "Provider (ACSE)"; break;
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case 3: s = "Provider (Presentation)"; break;
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default: break;
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}
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return s;
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}
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static const char *
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dcm_reason2str(guint8 source, guint8 reason)
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{
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const char *s = "";
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if (1 == source) switch (reason) {
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case 1: s = "No reason"; break;
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case 2: s = "App Name not supported"; break;
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case 3: s = "calling AET not recognized"; break;
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case 7: s = "called AET not recognized"; break;
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default: break;
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} else if (2 == source) switch (reason) {
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case 1: s = "No reason"; break;
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case 2: s = "protocol unsupported"; break;
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default: break;
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} else if (3 == source) switch (reason) {
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case 1: s = "temporary congestion"; break;
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case 2: s = "local limit exceeded"; break;
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default: break;
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}
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return s;
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}
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static const char *
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dcm_abort2str(guint8 reason)
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{
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const char *s = "";
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switch (reason) {
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case 0: s = "not specified"; break;
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case 1: s = "unrecognized"; break;
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case 2: s = "unexpected"; break;
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case 4: s = "unrecognized parameter"; break;
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case 5: s = "unexpected parameter"; break;
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case 6: s = "invalid parameter"; break;
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default: break;
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}
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return s;
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}
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static const char *
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dcm_PCresult2str(guint8 result)
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{
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const char *s = "";
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switch (result) {
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case 0: s = "accept"; break;
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case 1: s = "user-reject"; break;
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case 2: s = "no-reason"; break;
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case 3: s = "abstract syntax unsupported"; break;
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case 4: s = "transfer syntax unsupported"; break;
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default: break;
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}
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return s;
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}
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static const char *
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dcm_flags2str(guint8 flags)
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{
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const char *s = "";
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switch (flags) {
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case 0: s = "Data, more Fragments"; break; /* 00 */
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case 1: s = "Command, more Fragments"; break; /* 01 */
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case 2: s = "Data, last Fragment"; break; /* 10 */
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case 3: s = "Command, last Fragment"; break; /* 11 */
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default: break;
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}
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return s;
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}
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static const char *
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dcm_cmd2str(guint16 us)
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{
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const char *s = "";
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/* there should be a better way to do this */
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switch (us) {
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case 0x0001: s = "C-STORE-RQ"; break;
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case 0x8001: s = "C-STORE-RSP"; break;
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case 0x0010: s = "C-GET-RQ"; break;
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case 0x8010: s = "C-GET-RSP"; break;
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case 0x0020: s = "C-FIND-RQ"; break;
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case 0x8020: s = "C-FIND-RSP"; break;
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case 0x0021: s = "C-MOVE-RQ"; break;
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case 0x8021: s = "C-MOVE-RSP"; break;
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case 0x0030: s = "C-ECHO-RQ"; break;
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case 0x8030: s = "C-ECHO-RSP"; break;
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case 0x0100: s = "N-EVENT-REPORT-RQ"; break;
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case 0x8100: s = "N-EVENT-REPORT-RSP"; break;
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case 0x0110: s = "N-GET-RQ"; break;
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case 0x8110: s = "N-GET-RSP"; break;
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case 0x0120: s = "N-SET-RQ"; break;
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case 0x8120: s = "N-SET-RSP"; break;
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case 0x0130: s = "N-ACTION-RQ"; break;
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case 0x8130: s = "N-ACTION-RSP"; break;
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case 0x0140: s = "N-CREATE-RQ"; break;
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case 0x8140: s = "N-CREATE-RSP"; break;
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case 0x0150: s = "N-DELETE-RQ"; break;
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case 0x8150: s = "N-DELETE-RSP"; break;
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case 0x0fff: s = "C-CANCEL-RQ"; break;
|
|
default: break;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
static const char *
|
|
dcm_rsp2str(guint16 us)
|
|
{
|
|
const char *s = "";
|
|
switch (us) {
|
|
case 0x0000: s = "Success"; break;
|
|
case 0xa701:
|
|
case 0xa702: s = "Refused: Out of Resources"; break;
|
|
case 0xa801: s = "Refused: Move Destination unknown"; break;
|
|
case 0xa900: s = "Failed: Id does not match Class"; break;
|
|
case 0xb000: s = "Warning: operations complete -- One or more Failures"; break;
|
|
case 0xfe00: s = "Cancel: operations terminated by Cancel"; break;
|
|
case 0xff00: s = "Pending: operations are continuing"; break;
|
|
default: break;
|
|
}
|
|
if (0xC000 == (0xF000 & us)) s = "Failed: Unable to Process";
|
|
return s;
|
|
}
|
|
|
|
static void
|
|
dcm_setSyntax(dcmItem_t *di, char *name)
|
|
{
|
|
if (NULL == di) return;
|
|
if (di->xfer != NULL)
|
|
g_free(di->xfer); /* free prev allocated xfer */
|
|
di->syntax = 0;
|
|
di->xfer = g_strdup(name);
|
|
if (0 == *name) return;
|
|
/* this would be faster to skip the common parts, and have a FSA to
|
|
* find the syntax.
|
|
* Absent of coding that, this is in descending order of probability */
|
|
if (0 == strcmp(name, "1.2.840.10008.1.2"))
|
|
di->syntax = DCM_ILE; /* implicit little endian */
|
|
else if (0 == strcmp(name, "1.2.840.10008.1.2.1"))
|
|
di->syntax = DCM_ELE; /* explicit little endian */
|
|
else if (0 == strcmp(name, "1.2.840.10008.1.2.2"))
|
|
di->syntax = DCM_EBE; /* explicit big endian */
|
|
else if (0 == strcmp(name, "1.2.840.113619.5.2"))
|
|
di->syntax = DCM_ILE; /* implicit little endian, big endian pixels */
|
|
else if (0 == strcmp(name, "1.2.840.10008.1.2.4.70"))
|
|
di->syntax = DCM_ELE; /* explicit little endian, jpeg */
|
|
else if (0 == strncmp(name, "1.2.840.10008.1.2.4", 18))
|
|
di->syntax = DCM_ELE; /* explicit little endian, jpeg */
|
|
else if (0 == strcmp(name, "1.2.840.10008.1.2.1.99"))
|
|
di->syntax = DCM_ELE; /* explicit little endian, deflated */
|
|
}
|
|
|
|
static char *
|
|
dcm_tag2str(guint16 grp, guint16 elm, guint8 syntax, tvbuff_t *tvb, int offset, guint32 len, int vr, int tr)
|
|
{
|
|
char *buf;
|
|
const guint8 *vval;
|
|
char *p;
|
|
guint32 tag, val32;
|
|
guint16 val16;
|
|
dcmTag_t *dtag;
|
|
static dcmTag_t utag = { 0, 0, "(unknown)" };
|
|
|
|
#define MAX_BUF_LEN 1024
|
|
buf=ep_alloc(MAX_BUF_LEN);
|
|
*buf = 0;
|
|
if (0 == elm) {
|
|
if (DCM_ILE & syntax)
|
|
val32 = tvb_get_letohl(tvb, offset);
|
|
else val32 = tvb_get_ntohl(tvb, offset);
|
|
g_snprintf(buf, MAX_BUF_LEN, "Group Length 0x%x (%d)", val32, val32);
|
|
return buf;
|
|
}
|
|
tag = (grp << 16) | elm;
|
|
if (NULL == (dtag = g_hash_table_lookup(dcm_tagTable, GUINT_TO_POINTER(tag))))
|
|
dtag = &utag;
|
|
|
|
DISSECTOR_ASSERT(MAX_BUF_LEN > strlen(dtag->desc));
|
|
p=buf;
|
|
p+=g_snprintf(p, MAX_BUF_LEN-(p-buf), "%s", dtag->desc);
|
|
if (vr > 0) {
|
|
vval = tvb_format_text(tvb, vr, 2);
|
|
p+=g_snprintf(p, MAX_BUF_LEN-(p-buf), " [%s]", vval);
|
|
}
|
|
|
|
switch (tr > 0 ? tr : dtag->dtype) {
|
|
case DCM_TSTR:
|
|
default: /* try ascii */
|
|
vval = tvb_format_text(tvb, offset, len);
|
|
p+=g_snprintf(p, MAX_BUF_LEN-(p-buf), " %s", vval);
|
|
break;
|
|
case DCM_TINT2:
|
|
if (DCM_ILE & syntax)
|
|
val16 = tvb_get_letohs(tvb, offset);
|
|
else val16 = tvb_get_ntohs(tvb, offset);
|
|
p+=g_snprintf(p, MAX_BUF_LEN-(p-buf), " 0x%x (%d)", val16, val16);
|
|
break;
|
|
case DCM_TINT4:
|
|
if (DCM_ILE & syntax)
|
|
val32 = tvb_get_letohl(tvb, offset);
|
|
else val32 = tvb_get_ntohl(tvb, offset);
|
|
p+=g_snprintf(p, MAX_BUF_LEN-(p-buf), " 0x%x (%d)", val32, val32);
|
|
break;
|
|
case DCM_TFLT: {
|
|
gfloat valf;
|
|
if (DCM_ILE & syntax)
|
|
valf = tvb_get_letohieee_float(tvb, offset);
|
|
else valf = tvb_get_ntohieee_float(tvb, offset);
|
|
p+=g_snprintf(p, MAX_BUF_LEN-(p-buf), " (%f)", valf);
|
|
} break;
|
|
case DCM_TDBL: {
|
|
gdouble vald;
|
|
if (DCM_ILE & syntax)
|
|
vald = tvb_get_letohieee_double(tvb, offset);
|
|
else vald = tvb_get_ntohieee_double(tvb, offset);
|
|
p+=g_snprintf(p, MAX_BUF_LEN-(p-buf), " (%f)", vald);
|
|
} break;
|
|
case DCM_TSTAT: /* call dcm_rsp2str() on TINT2 */
|
|
if (DCM_ILE & syntax)
|
|
val16 = tvb_get_letohs(tvb, offset);
|
|
else val16 = tvb_get_ntohs(tvb, offset);
|
|
p+=g_snprintf(p, MAX_BUF_LEN-(p-buf), " 0x%x '%s'", val16, dcm_rsp2str(val16));
|
|
break;
|
|
case DCM_TCMD: /* call dcm_cmd2str() on TINT2 */
|
|
if (DCM_ILE & syntax)
|
|
val16 = tvb_get_letohs(tvb, offset);
|
|
else val16 = tvb_get_ntohs(tvb, offset);
|
|
p+=g_snprintf(p, MAX_BUF_LEN-(p-buf), " 0x%x '%s'", val16, dcm_cmd2str(val16));
|
|
break;
|
|
case DCM_SQ: /* Sequence */
|
|
case DCM_OTH: /* Other BYTE, WORD, ... */
|
|
case DCM_TRET: /* Retired */
|
|
break;
|
|
}
|
|
return buf;
|
|
}
|
|
|
|
static guint
|
|
dcm_get_pdu_len(tvbuff_t *tvb, int offset)
|
|
{
|
|
guint32 len;
|
|
|
|
len = tvb_get_ntohl(tvb, 2 + offset);
|
|
return len + 6; /* add in fixed header part */
|
|
}
|
|
|
|
static void
|
|
dissect_dcm_assoc(dcmState_t *dcm_data, proto_item *ti, tvbuff_t *tvb, int offset)
|
|
{
|
|
proto_tree *dcm_tree = NULL;
|
|
dcmItem_t *di = NULL;
|
|
guint8 id, *name, result;
|
|
int reply = 0;
|
|
|
|
if (!ti)
|
|
return;
|
|
|
|
dcm_tree = proto_item_add_subtree(ti, ett_assoc);
|
|
while (-1 < offset && offset < (int) dcm_data->clen) {
|
|
guint16 len;
|
|
guint32 mlen;
|
|
id = tvb_get_guint8(tvb, offset);
|
|
len = tvb_get_ntohs(tvb, 2 + offset);
|
|
if (ti)
|
|
proto_tree_add_uint_format(dcm_tree, hf_dcm_pdi, tvb,
|
|
offset, 4+len, id, "Item 0x%x (%s)", id, dcm_pdu2str(id));
|
|
offset += 4;
|
|
switch (id) {
|
|
case 0x10: /* App context */
|
|
if (ti)
|
|
proto_tree_add_item(dcm_tree, hf_dcm_pdi_name, tvb, offset, len > 65 ? 65 : len, FALSE);
|
|
offset += len;
|
|
break;
|
|
case 0x30: /* Abstract syntax */
|
|
if (ti)
|
|
proto_tree_add_item(dcm_tree, hf_dcm_pdi_syntax, tvb, offset, len > 65 ? 65 : len, FALSE);
|
|
offset += len;
|
|
break;
|
|
case 0x40: /* Transfer syntax */
|
|
if (ti)
|
|
proto_tree_add_item(dcm_tree, hf_dcm_pdi_syntax, tvb, offset, len > 65 ? 65 : len, FALSE);
|
|
if (reply && di && di->valid) {
|
|
name = tvb_get_ephemeral_string(tvb, offset, len);
|
|
dcm_setSyntax(di, name);
|
|
}
|
|
reply = 0;
|
|
offset += len;
|
|
break;
|
|
case 0x20: /* Presentation context */
|
|
id = tvb_get_guint8(tvb, offset);
|
|
di = lookupCtx(dcm_data, id);
|
|
if (!di->valid) {
|
|
di = se_alloc(sizeof(struct dcmItem));
|
|
di->id = id;
|
|
di->valid = 1;
|
|
di->xfer = NULL;
|
|
di->syntax = DCM_UNK;
|
|
di->next = di->prev = NULL;
|
|
if (dcm_data->last) {
|
|
dcm_data->last->next = di;
|
|
di->prev = dcm_data->last;
|
|
dcm_data->last = di;
|
|
} else
|
|
dcm_data->first = dcm_data->last = di;
|
|
}
|
|
if (ti)
|
|
proto_tree_add_item(dcm_tree, hf_dcm_pctxt, tvb, offset, 1, FALSE);
|
|
offset += 4;
|
|
break;
|
|
case 0x21: /* Presentation context reply */
|
|
id = tvb_get_guint8(tvb, offset);
|
|
result = tvb_get_guint8(tvb, 2 + offset);
|
|
if (ti) {
|
|
proto_tree_add_item(dcm_tree, hf_dcm_pctxt, tvb, offset, 1, FALSE);
|
|
proto_tree_add_uint_format(dcm_tree, hf_dcm_pcres, tvb,
|
|
2 + offset, 1, result,
|
|
"Result 0x%x (%s)", result, dcm_PCresult2str(result));
|
|
}
|
|
if (0 == result) {
|
|
reply = 1;
|
|
di = lookupCtx(dcm_data, id);
|
|
offset += 4;
|
|
} else
|
|
offset += len;
|
|
break;
|
|
case 0x50: /* User Info */
|
|
break;
|
|
case 0x51: /* Max length */
|
|
mlen = tvb_get_ntohl(tvb, offset);
|
|
if (ti)
|
|
proto_tree_add_item(dcm_tree, hf_dcm_pdu_maxlen, tvb, offset, 4, FALSE);
|
|
offset += len;
|
|
break;
|
|
case 0x52: /* UID */
|
|
if (ti)
|
|
proto_tree_add_item(dcm_tree, hf_dcm_impl, tvb, offset, len > 65 ? 65 : len, FALSE);
|
|
offset += len;
|
|
break;
|
|
case 0x55: /* version */
|
|
if (ti)
|
|
proto_tree_add_item(dcm_tree, hf_dcm_vers, tvb, offset, len > 17 ? 17 : len, FALSE);
|
|
offset += len;
|
|
break;
|
|
case 0x53: /* async negotion */
|
|
/* hf_dcm_async */
|
|
offset += len;
|
|
break;
|
|
default:
|
|
offset += len;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
dcmItem_t *
|
|
lookupCtx(dcmState_t *dd, guint8 ctx)
|
|
{
|
|
dcmItem_t *di = dd->first;
|
|
static dcmItem_t dunk = { NULL, NULL, 0, -1,
|
|
"not found - click on ASSOC Request",
|
|
"not found - click on ASSOC Request", DCM_UNK };
|
|
while (di) {
|
|
if (ctx == di->id)
|
|
break;
|
|
di = di->next;
|
|
}
|
|
return di ? di : &dunk;
|
|
}
|
|
|
|
/*
|
|
04 P-DATA-TF
|
|
1 1 reserved
|
|
2 4 length
|
|
- (1+) presentation data value (PDV) items
|
|
6 4 length
|
|
10 1 Presentation Context ID (odd ints 1 - 255)
|
|
- PDV
|
|
11 1 header
|
|
0x01 if set, contains Message Command info, else Message Data
|
|
0x02 if set, contains last fragment
|
|
*/
|
|
#define D_HEADER 1
|
|
#define D_TAG 2
|
|
#define D_VR 3
|
|
#define D_LEN2 4
|
|
#define D_LEN4 5
|
|
#define D_VALUE 6
|
|
|
|
static void
|
|
dissect_dcm_data(dcmState_t *dcm_data, proto_item *ti, tvbuff_t *tvb)
|
|
{
|
|
int len, offset, toffset, state, vr, tr;
|
|
proto_tree *dcm_tree;
|
|
dcmItem_t *di;
|
|
guint8 ctx, syntax = DCM_UNK;
|
|
guint16 grp = 0, elm = 0;
|
|
guint32 tlen = 0, nlen;
|
|
|
|
dcm_tree = proto_item_add_subtree(ti, ett_dcm_data);
|
|
proto_tree_add_item(dcm_tree, hf_dcm_data_len, tvb, 6, 4, FALSE);
|
|
ctx = tvb_get_guint8(tvb, 10);
|
|
di = lookupCtx(dcm_data, ctx);
|
|
/*
|
|
* XXX - telling the user to "click on ASSOC request" is bogus if we
|
|
* have already identified the ASSOC request and can connect it to
|
|
* this mnessage; if clicking on a request prior to this one causes
|
|
* additional state information to be set up that would affect the
|
|
* dissection of this request, we should set up that state *at the
|
|
* time we dissect that request*, if possible, and if clicking on it
|
|
* doesn't change any state, clicking on the request doesn't convey
|
|
* any additional information.
|
|
*/
|
|
proto_tree_add_uint_format(dcm_tree, hf_dcm_data_ctx, tvb, 10, 1,
|
|
ctx, "Context 0x%x (%s)", ctx,
|
|
di->xfer == NULL ? "not found - click on ASSOC Request" :
|
|
di->xfer);
|
|
if (DCM_UNK == di->syntax)
|
|
return;
|
|
len = offset = toffset = 11;
|
|
state = D_HEADER;
|
|
nlen = 1;
|
|
while (len + nlen <= dcm_data->tlen && len + nlen <= dcm_data->clen) {
|
|
switch (state) {
|
|
case D_HEADER: {
|
|
guint8 flags;
|
|
flags = tvb_get_guint8(tvb, offset);
|
|
proto_tree_add_uint_format(dcm_tree, hf_dcm_data_flags, tvb, offset, 1,
|
|
flags, "Flags 0x%x (%s)", flags, dcm_flags2str(flags));
|
|
/* proto_tree_add_item(dcm_tree, hf_dcm_data_flags, tvb, offset, 1, FALSE); */
|
|
len++;
|
|
offset++;
|
|
if (0x1 & flags)
|
|
syntax = DCM_ILE;
|
|
else if (DCM_UNK == di->syntax) {
|
|
const guint8 *val;
|
|
tlen = dcm_data->clen - len;
|
|
val = tvb_get_ptr(tvb, offset, tlen+8);
|
|
proto_tree_add_bytes_format(dcm_tree, hf_dcm_data_tag, tvb,
|
|
offset, tlen, val, "(%04x,%04x) %-8x Unparsed data", 0, 0, tlen);
|
|
len = dcm_data->clen; /* ends parsing */
|
|
} else
|
|
syntax = di->syntax;
|
|
state = D_TAG;
|
|
nlen = 4;
|
|
} break; /* don't fall through -- check length */
|
|
case D_TAG: {
|
|
vr = tr = 0;
|
|
if (DCM_ILE & syntax) {
|
|
grp = tvb_get_letohs(tvb, offset);
|
|
elm = tvb_get_letohs(tvb, offset+2);
|
|
state = (DCM_EBE & syntax) ? D_VR : D_LEN4; /* is Explicit */
|
|
nlen = (DCM_EBE & syntax) ? 2 : 4; /* is Explicit */
|
|
} else {
|
|
grp = tvb_get_ntohs(tvb, offset);
|
|
elm = tvb_get_ntohs(tvb, offset+2);
|
|
state = D_VR;
|
|
nlen = 2;
|
|
}
|
|
toffset = offset;
|
|
if (0xfffe == grp) state = D_LEN4;
|
|
offset += 4;
|
|
len += 4;
|
|
} break; /* don't fall through -- check length */
|
|
case D_VR: {
|
|
guint8 V, R;
|
|
vr = offset;
|
|
V = tvb_get_guint8(tvb, offset); offset++;
|
|
R = tvb_get_guint8(tvb, offset); offset++;
|
|
len += 2;
|
|
/* 4byte lengths OB, OW, OF, SQ, UN, UT */
|
|
state = D_LEN2;
|
|
nlen = 2;
|
|
if ((('O' == V) && ('B' == R || 'W' == R || 'F' == R) && (tr = DCM_OTH))
|
|
|| (('U' == V) && ('N' == R || (('T' == R) && (tr = DCM_TSTR))))
|
|
|| ('S' == V && 'Q' == R && (tr = DCM_SQ))) {
|
|
state = D_LEN4;
|
|
offset += 2; /* skip 00 (2 bytes) */
|
|
len += 2;
|
|
nlen = 4;
|
|
} else if ('F' == V && 'L' == R) {
|
|
tr = DCM_TFLT;
|
|
} else if ('F' == V && 'D' == R) {
|
|
tr = DCM_TDBL;
|
|
} else if (('S' == V && 'L' == R) || ('U' == V && 'L' == R)) {
|
|
tr = DCM_TINT4;
|
|
} else if (('S' == V && 'S' == R) || ('U' == V && 'S' == R)) {
|
|
tr = DCM_TINT2;
|
|
} else if ('A' == V && 'T' == R) {
|
|
tr = DCM_OTH;
|
|
} else
|
|
tr = DCM_TSTR;
|
|
/*
|
|
else if (('A' == V && ('E' == R || 'S' == R))
|
|
|| ('C' == V && 'S' == R)
|
|
|| ('D' == V && ('A' == R || 'S' == R || 'T' == R))
|
|
|| ('I' == V && 'S' == R)
|
|
|| ('L' == V && ('O' == R || 'T' == R))
|
|
|| ('P' == V && 'N' == R)
|
|
|| ('S' == V && ('H' == R ||| 'T' == R))
|
|
|| ('T' == V && 'M' == R)
|
|
|| ('U' == V && ('I' == R || 'T' == R)))
|
|
tr = DCM_TSTR;
|
|
*/
|
|
} break; /* don't fall through -- check length */
|
|
case D_LEN2: {
|
|
if (DCM_ILE & syntax) /* is it LE */
|
|
tlen = tvb_get_letohs(tvb, offset);
|
|
else
|
|
tlen = tvb_get_ntohs(tvb, offset);
|
|
offset += 2;
|
|
len += 2;
|
|
state = D_VALUE;
|
|
nlen = tlen;
|
|
} break;
|
|
case D_LEN4: {
|
|
if (DCM_ILE & syntax) /* is it LE */
|
|
tlen = tvb_get_letohl(tvb, offset);
|
|
else
|
|
tlen = tvb_get_ntohl(tvb, offset);
|
|
offset += 4;
|
|
len += 4;
|
|
state = D_VALUE;
|
|
nlen = tlen;
|
|
} break; /* don't fall through -- check length */
|
|
case D_VALUE: {
|
|
const guint8 *val;
|
|
int totlen = (offset - toffset);
|
|
if (0xffffffff == tlen || 0xfffe == grp) {
|
|
val = tvb_get_ptr(tvb, toffset, totlen);
|
|
proto_tree_add_bytes_format(dcm_tree, hf_dcm_data_tag, tvb,
|
|
toffset, totlen, val,
|
|
"(%04x,%04x) %-8x %s", grp, elm, tlen,
|
|
dcm_tag2str(grp, elm, syntax, tvb, offset, 0, vr, tr));
|
|
tlen = 0;
|
|
/* } else if (0xfffe == grp) { */ /* need to make a sub-tree here */
|
|
} else {
|
|
totlen += tlen;
|
|
val = tvb_get_ptr(tvb, toffset, totlen);
|
|
proto_tree_add_bytes_format(dcm_tree, hf_dcm_data_tag, tvb,
|
|
toffset, totlen, val,
|
|
"(%04x,%04x) %-8x %s", grp, elm, tlen,
|
|
dcm_tag2str(grp, elm, syntax, tvb, offset, tlen, vr, tr));
|
|
}
|
|
len += tlen;
|
|
offset += tlen;
|
|
state = D_TAG;
|
|
nlen = 4;
|
|
} break;
|
|
}
|
|
}
|
|
if (D_VALUE == state) {
|
|
const guint8 *val;
|
|
int totlen = (offset - toffset);
|
|
val = tvb_get_ptr(tvb, toffset, totlen);
|
|
proto_tree_add_bytes_format(dcm_tree, hf_dcm_data_tag, tvb,
|
|
toffset, totlen, val,
|
|
"(%04x,%04x) %-8x %s [incomplete]", grp, elm, tlen,
|
|
dcm_tag2str(grp, elm, syntax, tvb, offset, tlen, vr, tr));
|
|
}
|
|
}
|
|
|
|
/*
|
|
Originator src:srcport dest:destport
|
|
Acceptor src:srcport dest:destport
|
|
|
|
conn = lookup(src:srcport, dest:destport)
|
|
if (!conn)
|
|
look at data payload of packet
|
|
if no-data return false;
|
|
if 01 == *p && *p+10 ... *p+42 <= [ 0x20 .. printable ]
|
|
create conn
|
|
*/
|
|
|
|
static void dissect_dcm_pdu(tvbuff_t *tvb,packet_info *pinfo,proto_tree *tree);
|
|
|
|
/* Code to actually dissect the packets */
|
|
static gboolean
|
|
dissect_dcm(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
conversation_t *conv;
|
|
guint8 pdu;
|
|
guint16 vers;
|
|
guint32 len, tlen;
|
|
dcmState_t *dcm_data = NULL;
|
|
|
|
conv = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst,
|
|
pinfo->ptype, pinfo->srcport, pinfo->destport, 0);
|
|
|
|
if (NULL != conv) /* conversation exists */
|
|
/* do we have any data for this conversation ? */
|
|
dcm_data = conversation_get_proto_data(conv, proto_dcm);
|
|
else
|
|
conv = conversation_new(pinfo->fd->num, &pinfo->src, &pinfo->dst, pinfo->ptype,
|
|
pinfo->srcport, pinfo->destport, 0);
|
|
|
|
if (NULL == dcm_data) {
|
|
/* No conversation found.
|
|
* only look for the first packet of a DICOM conversation.
|
|
* if we don't get the first packet, we cannot decode the rest
|
|
* of the session.
|
|
*/
|
|
if (NULL == (dcm_data = mkds()))
|
|
return FALSE; /* internal error */
|
|
if (10 > (tlen = tvb_reported_length(tvb)) /* not long enough */
|
|
|| 1 != (pdu = tvb_get_guint8(tvb, 0)) /* look for the start */
|
|
|| 1 != (vers = tvb_get_ntohs(tvb, 6))) /* not version 1 */
|
|
dcm_data->valid = FALSE;
|
|
else {
|
|
len = 6 + tvb_get_ntohl(tvb, 2);
|
|
if (len < tlen)
|
|
dcm_data->valid = FALSE; /* packet is > decl len */
|
|
}
|
|
|
|
conversation_add_proto_data(conv, proto_dcm, dcm_data);
|
|
}
|
|
|
|
if (FALSE == dcm_data->valid)
|
|
return FALSE;
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_clear(pinfo->cinfo, COL_PROTOCOL);
|
|
|
|
tcp_dissect_pdus(tvb, pinfo, tree, 1, 6, dcm_get_pdu_len, dissect_dcm_pdu);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
dissect_dcm_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
proto_item *ti;
|
|
dcmState_t *dcm_data;
|
|
proto_tree *dcm_tree;
|
|
conversation_t *conv;
|
|
char *buf=NULL;
|
|
int offset = 0;
|
|
|
|
if (NULL == (conv = find_conversation(pinfo->fd->num, &pinfo->src, &pinfo->dst,
|
|
pinfo->ptype, pinfo->srcport, pinfo->destport, 0)))
|
|
return; /* OOPS */
|
|
|
|
dcm_data = conversation_get_proto_data(conv, proto_dcm);
|
|
|
|
if (check_col(pinfo->cinfo, COL_PROTOCOL))
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "DCM");
|
|
|
|
/* This field shows up as the "Info" column in the display; you should make
|
|
it, if possible, summarize what's in the packet, so that a user looking
|
|
at the list of packets can tell what type of packet it is. See section 1.5
|
|
for more information.
|
|
*/
|
|
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_clear(pinfo->cinfo, COL_INFO);
|
|
|
|
dcm_data->pdu = tvb_get_guint8(tvb, 0);
|
|
dcm_data->tlen = tvb_get_ntohl(tvb, 2) + 6;
|
|
dcm_data->clen = tvb_reported_length(tvb);
|
|
|
|
switch (dcm_data->pdu) {
|
|
case 1: /* ASSOC Request */
|
|
tvb_memcpy(tvb, dcm_data->orig, 10, 16);
|
|
tvb_memcpy(tvb, dcm_data->targ, 26, 16);
|
|
dcm_data->orig[AEEND] = dcm_data->targ[AEEND] = 0;
|
|
buf = ep_alloc(128);
|
|
g_snprintf(buf, 128, "DCM ASSOC Request %s <-- %s",
|
|
dcm_data->orig, dcm_data->targ);
|
|
offset = 74;
|
|
break;
|
|
case 2: /* ASSOC Accept */
|
|
tvb_memcpy(tvb, dcm_data->resp, 26, 16);
|
|
buf = ep_alloc(128);
|
|
g_snprintf(buf, 128, "DCM ASSOC Accept %s <-- %s (%s)",
|
|
dcm_data->orig, dcm_data->targ, dcm_data->resp);
|
|
offset = 74;
|
|
break;
|
|
case 3: /* ASSOC Reject */
|
|
dcm_data->result = tvb_get_guint8(tvb, 7);
|
|
dcm_data->source = tvb_get_guint8(tvb, 8);
|
|
dcm_data->reason = tvb_get_guint8(tvb, 9);
|
|
buf = ep_alloc(128);
|
|
g_snprintf(buf, 128, "DCM ASSOC Reject %s <-- %s %s %s %s",
|
|
dcm_data->orig, dcm_data->targ,
|
|
dcm_result2str(dcm_data->result),
|
|
dcm_source2str(dcm_data->source),
|
|
dcm_reason2str(dcm_data->source, dcm_data->reason));
|
|
offset = 10;
|
|
break;
|
|
case 4: /* DATA */
|
|
offset = 6;
|
|
buf="DCM Data";
|
|
break;
|
|
case 5: /* RELEASE Request */
|
|
buf="DCM RELEASE Request";
|
|
offset = 6;
|
|
break;
|
|
case 6: /* RELEASE Response */
|
|
buf="DCM RELEASE Response";
|
|
offset = 6;
|
|
break;
|
|
case 7: /* ABORT */
|
|
dcm_data->source = tvb_get_guint8(tvb, 8);
|
|
dcm_data->reason = tvb_get_guint8(tvb, 9);
|
|
buf = ep_alloc(128);
|
|
g_snprintf(buf, 128, "DCM ABORT %s <-- %s %s %s",
|
|
dcm_data->orig, dcm_data->targ,
|
|
(dcm_data->source == 1) ? "USER" :
|
|
(dcm_data->source == 2) ? "PROVIDER" : "",
|
|
dcm_data->source == 1 ? dcm_abort2str(dcm_data->reason) : "");
|
|
break;
|
|
default:
|
|
buf="DCM Continuation";
|
|
offset = -1; /* cannot continue parsing */
|
|
break;
|
|
}
|
|
if (check_col(pinfo->cinfo, COL_INFO))
|
|
col_set_str(pinfo->cinfo, COL_INFO, buf);
|
|
|
|
/* In the interest of speed, if "tree" is NULL, don't do any work not
|
|
necessary to generate protocol tree items. */
|
|
if (tree) {
|
|
proto_item *tf;
|
|
ti = proto_tree_add_item(tree, proto_dcm, tvb, 0, -1, FALSE);
|
|
dcm_tree = proto_item_add_subtree(ti, ett_dcm);
|
|
proto_tree_add_uint_format(dcm_tree, hf_dcm_pdu, tvb, 0, dcm_data->tlen,
|
|
dcm_data->pdu, "PDU 0x%x (%s)", dcm_data->pdu,
|
|
dcm_pdu2str(dcm_data->pdu));
|
|
proto_tree_add_item(dcm_tree, hf_dcm_pdu_len, tvb, 2, 4, FALSE);
|
|
|
|
switch (dcm_data->pdu) {
|
|
case 1: /* ASSOC Request */
|
|
case 2: /* ASSOC Accept */
|
|
case 3: /* ASSOC Reject */
|
|
case 5: /* RELEASE Request */
|
|
case 6: /* RELEASE Response */
|
|
case 7: /* ABORT */
|
|
tf = proto_tree_add_string(dcm_tree, hf_dcm_pdu_type, tvb, 0, dcm_data->tlen, buf);
|
|
dissect_dcm_assoc(dcm_data, tf, tvb, offset);
|
|
break;
|
|
case 4: /* DATA */
|
|
tf = proto_tree_add_string(dcm_tree, hf_dcm_pdu_type, tvb, 0, dcm_data->tlen, buf);
|
|
dissect_dcm_data(dcm_data, tf, tvb);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
/* Continue adding tree items to process the packet here */
|
|
} else if (1 == dcm_data->pdu || 2 == dcm_data->pdu) {
|
|
dissect_dcm_assoc(dcm_data, NULL, tvb, offset);
|
|
}
|
|
|
|
/* If this protocol has a sub-dissector call it here, see section 1.8 */
|
|
}
|
|
|
|
|
|
/* Register the protocol with Ethereal */
|
|
|
|
/* this format is require because a script is used to build the C function
|
|
that calls all the protocol registration.
|
|
*/
|
|
|
|
void
|
|
proto_register_dcm(void)
|
|
{
|
|
/* Setup list of header fields See Section 1.6.1 for details*/
|
|
static hf_register_info hf[] = {
|
|
{ &hf_dcm_pdu, { "PDU", "dcm.pdu",
|
|
FT_UINT8, BASE_HEX, VALS(dcm_pdu_ids), 0, "", HFILL } },
|
|
{ &hf_dcm_pdu_len, { "PDU LENGTH", "dcm.pdu_len",
|
|
FT_UINT32, BASE_HEX, NULL, 0, "", HFILL } },
|
|
{ &hf_dcm_pdu_type, { "PDU Detail", "dcm.pdu_detail",
|
|
FT_STRING, BASE_NONE, NULL, 0, "", HFILL } },
|
|
{ &hf_dcm_pdi, { "Item", "dcm.pdu.pdi",
|
|
FT_UINT8, BASE_HEX, VALS(dcm_pdi_ids), 0, "", HFILL } },
|
|
{ &hf_dcm_pdi_name, { "Application Context", "dcm.pdi.name",
|
|
FT_STRING, BASE_NONE, NULL, 0, "", HFILL } },
|
|
{ &hf_dcm_pdi_syntax, { "Abstract Syntax", "dcm.pdi.syntax",
|
|
FT_STRING, BASE_NONE, NULL, 0, "", HFILL } },
|
|
{ &hf_dcm_pctxt, { "Presentation Context", "dcm.pdi.ctxt",
|
|
FT_UINT8, BASE_HEX, NULL, 0, "", HFILL } },
|
|
{ &hf_dcm_pcres, { "Presentation Context result", "dcm.pdi.result",
|
|
FT_UINT8, BASE_HEX, VALS(dcm_pdi_ids), 0, "", HFILL } },
|
|
{ &hf_dcm_pdu_maxlen, { "MAX PDU LENGTH", "dcm.max_pdu_len",
|
|
FT_UINT32, BASE_DEC, NULL, 0, "", HFILL } },
|
|
{ &hf_dcm_impl, { "Implementation", "dcm.pdi.impl",
|
|
FT_STRING, BASE_NONE, NULL, 0, "", HFILL } },
|
|
{ &hf_dcm_vers, { "Version", "dcm.pdi.version",
|
|
FT_STRING, BASE_NONE, NULL, 0, "", HFILL } },
|
|
{ &hf_dcm_async, { "Asynch", "dcm.pdi.async",
|
|
FT_STRING, BASE_NONE, NULL, 0, "", HFILL } },
|
|
{ &hf_dcm_data_len, { "DATA LENGTH", "dcm.data.len",
|
|
FT_UINT32, BASE_HEX, NULL, 0, "", HFILL } },
|
|
{ &hf_dcm_data_ctx, { "Data Context", "dcm.data.ctx",
|
|
FT_UINT8, BASE_HEX, NULL, 0, "", HFILL } },
|
|
{ &hf_dcm_data_flags, { "Flags", "dcm.data.flags",
|
|
FT_UINT8, BASE_HEX, NULL, 0, "", HFILL } },
|
|
{ &hf_dcm_data_tag, { "Tag", "dcm.data.tag",
|
|
FT_BYTES, BASE_HEX, NULL, 0, "", HFILL } },
|
|
/*
|
|
{ &hf_dcm_FIELDABBREV, { "FIELDNAME", "dcm.FIELDABBREV",
|
|
FIELDTYPE, FIELDBASE, FIELDCONVERT, BITMASK, "FIELDDESCR", HFILL } },
|
|
*/
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
static gint *ett[] = {
|
|
&ett_dcm,
|
|
&ett_assoc,
|
|
&ett_dcm_data
|
|
};
|
|
/* Register the protocol name and description */
|
|
proto_dcm = proto_register_protocol("DICOM", "dicom", "dcm");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
proto_register_field_array(proto_dcm, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
register_init_routine(&dcm_init);
|
|
}
|
|
|
|
|
|
/* If this dissector uses sub-dissector registration add a registration routine.
|
|
This format is required because a script is used to find these routines and
|
|
create the code that calls these routines.
|
|
*/
|
|
void
|
|
proto_reg_handoff_dcm(void)
|
|
{
|
|
dissector_handle_t dcm_handle;
|
|
|
|
heur_dissector_add("tcp", dissect_dcm, proto_dcm);
|
|
dcm_handle = new_create_dissector_handle(dissect_dcm, proto_dcm);
|
|
dissector_add("tcp.port", 104, dcm_handle);
|
|
}
|
|
|
|
/*
|
|
|
|
PDU's
|
|
01 ASSOC-RQ
|
|
1 1 reserved
|
|
2 4 length
|
|
6 2 protocol version (0x0 0x1)
|
|
8 2 reserved
|
|
10 16 dest aetitle
|
|
26 16 src aetitle
|
|
42 32 reserved
|
|
74 - presentation data value items
|
|
|
|
02 A-ASSOC-AC
|
|
1 reserved
|
|
4 length
|
|
2 protocol version (0x0 0x1)
|
|
2 reserved
|
|
16 dest aetitle (not checked)
|
|
16 src aetitle (not checked)
|
|
32 reserved
|
|
- presentation data value items
|
|
|
|
03 ASSOC-RJ
|
|
1 reserved
|
|
4 length (4)
|
|
1 reserved
|
|
1 result (1 reject perm, 2 reject transient)
|
|
1 source (1 service user, 2 service provider, 3 service profider)
|
|
1 reason
|
|
1 == source
|
|
1 no reason given
|
|
2 application context name not supported
|
|
3 calling aetitle not recognized
|
|
7 called aetitle not recognized
|
|
2 == source
|
|
1 no reason given
|
|
2 protocol version not supported
|
|
3 == source
|
|
1 temporary congestion
|
|
2 local limit exceeded
|
|
|
|
04 P-DATA-TF
|
|
1 1 reserved
|
|
2 4 length
|
|
- (1+) presentation data value (PDV) items
|
|
6 4 length
|
|
10 1 Presentation Context ID (odd ints 1 - 255)
|
|
- PDV
|
|
11 1 header
|
|
0x01 if set, contains Message Command info, else Message Data
|
|
0x02 if set, contains last fragment
|
|
|
|
05 A-RELEASE-RQ
|
|
1 reserved
|
|
4 length (4)
|
|
4 reserved
|
|
|
|
06 A-RELEASE-RP
|
|
1 reserved
|
|
4 length (4)
|
|
4 reserved
|
|
|
|
07 A-ABORT
|
|
1 reserved
|
|
4 length (4)
|
|
2 reserved
|
|
1 source (0 = user, 1 = provider)
|
|
1 reason if 1 == source (0 not spec, 1 unrecognized, 2 unexpected 4 unrecognized param, 5 unexpected param, 6 invalid param)
|
|
|
|
|
|
|
|
ITEM's
|
|
10 Application Context
|
|
1 reserved
|
|
2 length
|
|
- name
|
|
|
|
20 Presentation Context
|
|
1 reserved
|
|
2 length
|
|
1 Presentation context id
|
|
3 reserved
|
|
- (1) abstract and (1+) transfer syntax sub-items
|
|
|
|
21 Presentation Context (Reply)
|
|
1 reserved
|
|
2 length
|
|
1 ID (odd int's 1-255)
|
|
1 reserved
|
|
1 result (0 accept, 1 user-reject, 2 no-reason, 3 abstract not supported, 4- transfer syntax not supported)
|
|
1 reserved
|
|
- (1) type 40
|
|
|
|
30 Abstract syntax
|
|
1 reserved
|
|
2 length
|
|
- name (<= 64)
|
|
|
|
40 Transfer syntax
|
|
1 reserved
|
|
2 length
|
|
- name (<= 64)
|
|
|
|
50 user information
|
|
1 reserved
|
|
2 length
|
|
- user data
|
|
|
|
51 max length
|
|
1 reserved
|
|
2 length (4)
|
|
4 max PDU lengths
|
|
*/
|