334 lines
9.0 KiB
C
334 lines
9.0 KiB
C
/* packet-jpeg.c
|
|
*
|
|
* Routines for RFC 2435 JPEG dissection
|
|
*
|
|
* Copyright 2006
|
|
* Erwin Rol <erwin@erwinrol.com>
|
|
* Copyright 2001,
|
|
* Francisco Javier Cabello Torres, <fjcabello@vtools.es>
|
|
*
|
|
* Wireshark - Network traffic analyzer
|
|
* By Gerald Combs <gerald@wireshark.org>
|
|
* Copyright 1998 Gerald Combs
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#define NEW_PROTO_TREE_API
|
|
|
|
#include "config.h"
|
|
|
|
#include <epan/packet.h>
|
|
|
|
#include <epan/rtp_pt.h>
|
|
|
|
#include "packet-ber.h"
|
|
|
|
void proto_register_jpeg(void);
|
|
void proto_reg_handoff_jpeg(void);
|
|
|
|
static dissector_handle_t jpeg_handle;
|
|
|
|
static header_field_info *hfi_jpeg = NULL;
|
|
|
|
static const range_string jpeg_ts_rvals [] = {
|
|
{0, 0, "Progressively scanned"},
|
|
{1, 1, "Odd field of interlaced signal"},
|
|
{2, 2, "Even field of interlaced signal"},
|
|
{3, 3, "Interlaced field to be line doubled"},
|
|
{3, 0xff, "Unspecified"},
|
|
{0, 0, NULL}
|
|
};
|
|
|
|
static const range_string jpeg_type_rvals [] = {
|
|
{ 0, 0, "4:2:2 Video"},
|
|
{ 1, 1, "4:2:0 Video"},
|
|
{ 2, 5, "Reserved"}, /* Previously assigned by RFC 2035 */
|
|
{ 6, 63, "Unassigned"},
|
|
{ 64, 64, "4:2:0 Video, Restart Markers present"},
|
|
{ 65, 65, "4:2:0 Video, Restart Markers present"},
|
|
{ 66, 69, "Reserved"}, /* Since [2,5] are reserved */
|
|
{ 70, 127, "Unassigned, Restart Markers present"},
|
|
{128, 255, "Dynamically assigned"},
|
|
{ 0, 0, NULL}
|
|
};
|
|
|
|
#define JPEG_HFI_INIT HFI_INIT(proto_jpeg)
|
|
|
|
/* JPEG header fields */
|
|
static header_field_info hfi_rtp_jpeg_main_hdr JPEG_HFI_INIT = {
|
|
"Main Header",
|
|
"jpeg.main_hdr",
|
|
FT_NONE, BASE_NONE, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_main_hdr_ts JPEG_HFI_INIT = {
|
|
"Type Specific",
|
|
"jpeg.main_hdr.ts",
|
|
FT_UINT8, BASE_DEC|BASE_RANGE_STRING, RVALS(jpeg_ts_rvals), 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_main_hdr_offs JPEG_HFI_INIT = {
|
|
"Fragment Offset",
|
|
"jpeg.main_hdr.offset",
|
|
FT_UINT24, BASE_DEC, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_main_hdr_type JPEG_HFI_INIT = {
|
|
"Type",
|
|
"jpeg.main_hdr.type",
|
|
FT_UINT8, BASE_DEC|BASE_RANGE_STRING, RVALS(jpeg_type_rvals), 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_main_hdr_q JPEG_HFI_INIT = {
|
|
"Q",
|
|
"jpeg.main_hdr.q",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_main_hdr_width JPEG_HFI_INIT = {
|
|
"Width",
|
|
"jpeg.main_hdr.width",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_main_hdr_height JPEG_HFI_INIT = {
|
|
"Height",
|
|
"jpeg.main_hdr.height",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_restart_hdr JPEG_HFI_INIT = {
|
|
"Restart Marker Header",
|
|
"jpeg.restart_hdr",
|
|
FT_NONE, BASE_NONE, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_restart_hdr_interval JPEG_HFI_INIT = {
|
|
"Restart Interval",
|
|
"jpeg.restart_hdr.interval",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_restart_hdr_f JPEG_HFI_INIT = {
|
|
"F",
|
|
"jpeg.restart_hdr.f",
|
|
FT_UINT16, BASE_DEC, NULL, 0x8000,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_restart_hdr_l JPEG_HFI_INIT = {
|
|
"L",
|
|
"jpeg.restart_hdr.l",
|
|
FT_UINT16, BASE_DEC, NULL, 0x4000,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_restart_hdr_count JPEG_HFI_INIT = {
|
|
"Restart Count",
|
|
"jpeg.restart_hdr.count",
|
|
FT_UINT16, BASE_DEC, NULL, 0x3FFF,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_qtable_hdr JPEG_HFI_INIT = {
|
|
"Quantization Table Header",
|
|
"jpeg.qtable_hdr",
|
|
FT_NONE, BASE_NONE, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_qtable_hdr_mbz JPEG_HFI_INIT = {
|
|
"MBZ",
|
|
"jpeg.qtable_hdr.mbz",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_qtable_hdr_prec JPEG_HFI_INIT = {
|
|
"Precision",
|
|
"jpeg.qtable_hdr.precision",
|
|
FT_UINT8, BASE_DEC, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_qtable_hdr_length JPEG_HFI_INIT = {
|
|
"Length",
|
|
"jpeg.qtable_hdr.length",
|
|
FT_UINT16, BASE_DEC, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
static header_field_info hfi_rtp_jpeg_qtable_hdr_data JPEG_HFI_INIT = {
|
|
"Quantization Table Data",
|
|
"jpeg.qtable_hdr.data",
|
|
FT_BYTES, BASE_NONE, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
|
|
static header_field_info hfi_rtp_jpeg_payload JPEG_HFI_INIT = {
|
|
"Payload",
|
|
"jpeg.payload",
|
|
FT_BYTES, BASE_NONE, NULL, 0,
|
|
NULL, HFILL
|
|
};
|
|
|
|
|
|
/* JPEG fields defining a sub tree */
|
|
static gint ett_jpeg = -1;
|
|
|
|
static int
|
|
dissect_jpeg( tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_ )
|
|
{
|
|
proto_item *ti = NULL;
|
|
proto_tree *jpeg_tree = NULL;
|
|
proto_tree *main_hdr_tree = NULL;
|
|
proto_tree *restart_hdr_tree = NULL;
|
|
proto_tree *qtable_hdr_tree = NULL;
|
|
guint32 fragment_offset = 0;
|
|
guint16 len = 0;
|
|
guint8 type = 0;
|
|
guint8 q = 0;
|
|
gint h = 0;
|
|
gint w = 0;
|
|
|
|
unsigned int offset = 0;
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "JPEG");
|
|
|
|
col_set_str(pinfo->cinfo, COL_INFO, "JPEG message");
|
|
|
|
if ( tree ) {
|
|
ti = proto_tree_add_item( tree, hfi_jpeg, tvb, offset, -1, ENC_NA );
|
|
jpeg_tree = proto_item_add_subtree( ti, ett_jpeg );
|
|
|
|
ti = proto_tree_add_item(jpeg_tree, &hfi_rtp_jpeg_main_hdr, tvb, offset, 8, ENC_NA);
|
|
main_hdr_tree = proto_item_add_subtree(ti, ett_jpeg);
|
|
|
|
proto_tree_add_item(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_ts, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
proto_tree_add_item(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_offs, tvb, offset, 3, ENC_BIG_ENDIAN);
|
|
fragment_offset = tvb_get_ntoh24(tvb, offset);
|
|
offset += 3;
|
|
proto_tree_add_item(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_type, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
type = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
proto_tree_add_item(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_q, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
q = tvb_get_guint8(tvb, offset);
|
|
offset += 1;
|
|
w = tvb_get_guint8(tvb, offset) * 8;
|
|
proto_tree_add_uint(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_width, tvb, offset, 1, w);
|
|
offset += 1;
|
|
h = tvb_get_guint8(tvb, offset) * 8;
|
|
proto_tree_add_uint(main_hdr_tree, &hfi_rtp_jpeg_main_hdr_height, tvb, offset, 1, h);
|
|
offset += 1;
|
|
|
|
if (type >= 64 && type <= 127) {
|
|
ti = proto_tree_add_item(jpeg_tree, &hfi_rtp_jpeg_restart_hdr, tvb, offset, 4, ENC_NA);
|
|
restart_hdr_tree = proto_item_add_subtree(ti, ett_jpeg);
|
|
proto_tree_add_item(restart_hdr_tree, &hfi_rtp_jpeg_restart_hdr_interval, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
proto_tree_add_item(restart_hdr_tree, &hfi_rtp_jpeg_restart_hdr_f, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(restart_hdr_tree, &hfi_rtp_jpeg_restart_hdr_l, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
proto_tree_add_item(restart_hdr_tree, &hfi_rtp_jpeg_restart_hdr_count, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
offset += 2;
|
|
}
|
|
|
|
if (q >= 128 && fragment_offset == 0) {
|
|
ti = proto_tree_add_item(jpeg_tree, &hfi_rtp_jpeg_qtable_hdr, tvb, offset, -1, ENC_NA);
|
|
qtable_hdr_tree = proto_item_add_subtree(ti, ett_jpeg);
|
|
proto_tree_add_item(qtable_hdr_tree, &hfi_rtp_jpeg_qtable_hdr_mbz, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
proto_tree_add_item(qtable_hdr_tree, &hfi_rtp_jpeg_qtable_hdr_prec, tvb, offset, 1, ENC_BIG_ENDIAN);
|
|
offset += 1;
|
|
proto_tree_add_item(qtable_hdr_tree, &hfi_rtp_jpeg_qtable_hdr_length, tvb, offset, 2, ENC_BIG_ENDIAN);
|
|
len = tvb_get_ntohs(tvb, offset);
|
|
offset += 2;
|
|
if (len > 0) {
|
|
proto_tree_add_item(qtable_hdr_tree, &hfi_rtp_jpeg_qtable_hdr_data, tvb, offset, len, ENC_NA);
|
|
offset += len;
|
|
}
|
|
proto_item_set_len(ti, len + 4);
|
|
}
|
|
|
|
/* The rest of the packet is the JPEG data */
|
|
proto_tree_add_item( jpeg_tree, &hfi_rtp_jpeg_payload, tvb, offset, -1, ENC_NA );
|
|
}
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
void
|
|
proto_register_jpeg(void)
|
|
{
|
|
#ifndef HAVE_HFI_SECTION_INIT
|
|
static header_field_info *hfi[] =
|
|
{
|
|
&hfi_rtp_jpeg_main_hdr,
|
|
&hfi_rtp_jpeg_main_hdr_ts,
|
|
&hfi_rtp_jpeg_main_hdr_offs,
|
|
&hfi_rtp_jpeg_main_hdr_type,
|
|
&hfi_rtp_jpeg_main_hdr_q,
|
|
&hfi_rtp_jpeg_main_hdr_width,
|
|
&hfi_rtp_jpeg_main_hdr_height,
|
|
&hfi_rtp_jpeg_restart_hdr,
|
|
&hfi_rtp_jpeg_restart_hdr_interval,
|
|
&hfi_rtp_jpeg_restart_hdr_f,
|
|
&hfi_rtp_jpeg_restart_hdr_l,
|
|
&hfi_rtp_jpeg_restart_hdr_count,
|
|
&hfi_rtp_jpeg_qtable_hdr,
|
|
&hfi_rtp_jpeg_qtable_hdr_mbz,
|
|
&hfi_rtp_jpeg_qtable_hdr_prec,
|
|
&hfi_rtp_jpeg_qtable_hdr_length,
|
|
&hfi_rtp_jpeg_qtable_hdr_data,
|
|
&hfi_rtp_jpeg_payload,
|
|
};
|
|
#endif
|
|
|
|
static gint *ett[] =
|
|
{
|
|
&ett_jpeg,
|
|
};
|
|
|
|
int proto_jpeg;
|
|
|
|
proto_jpeg = proto_register_protocol("RFC 2435 JPEG","JPEG","jpeg");
|
|
hfi_jpeg = proto_registrar_get_nth(proto_jpeg);
|
|
|
|
proto_register_fields(proto_jpeg, hfi, array_length(hfi));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
|
|
jpeg_handle = register_dissector("jpeg", dissect_jpeg, proto_jpeg);
|
|
|
|
/* RFC 2798 */
|
|
register_ber_oid_dissector_handle("0.9.2342.19200300.100.1.60", jpeg_handle, proto_jpeg, "jpegPhoto");
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_jpeg(void)
|
|
{
|
|
dissector_add_uint("rtp.pt", PT_JPEG, jpeg_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - https://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|