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-rw-r--r--epan/dissectors/packet-jpeg.c282
1 files changed, 282 insertions, 0 deletions
diff --git a/epan/dissectors/packet-jpeg.c b/epan/dissectors/packet-jpeg.c
new file mode 100644
index 00000000..dd939233
--- /dev/null
+++ b/epan/dissectors/packet-jpeg.c
@@ -0,0 +1,282 @@
+/* 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
+ */
+#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 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}
+};
+
+static int proto_jpeg = -1;
+
+static int hf_rtp_jpeg_main_hdr = -1;
+static int hf_rtp_jpeg_main_hdr_height = -1;
+static int hf_rtp_jpeg_main_hdr_offs = -1;
+static int hf_rtp_jpeg_main_hdr_q = -1;
+static int hf_rtp_jpeg_main_hdr_ts = -1;
+static int hf_rtp_jpeg_main_hdr_type = -1;
+static int hf_rtp_jpeg_main_hdr_width = -1;
+static int hf_rtp_jpeg_payload = -1;
+static int hf_rtp_jpeg_qtable_hdr = -1;
+static int hf_rtp_jpeg_qtable_hdr_data = -1;
+static int hf_rtp_jpeg_qtable_hdr_length = -1;
+static int hf_rtp_jpeg_qtable_hdr_mbz = -1;
+static int hf_rtp_jpeg_qtable_hdr_prec = -1;
+static int hf_rtp_jpeg_restart_hdr = -1;
+static int hf_rtp_jpeg_restart_hdr_count = -1;
+static int hf_rtp_jpeg_restart_hdr_f = -1;
+static int hf_rtp_jpeg_restart_hdr_interval = -1;
+static int hf_rtp_jpeg_restart_hdr_l = -1;
+
+/* 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, proto_jpeg, tvb, offset, -1, ENC_NA );
+ jpeg_tree = proto_item_add_subtree( ti, ett_jpeg );
+
+ ti = proto_tree_add_item(jpeg_tree, hf_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, hf_rtp_jpeg_main_hdr_ts, tvb, offset, 1, ENC_BIG_ENDIAN);
+ offset += 1;
+ proto_tree_add_item(main_hdr_tree, hf_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, hf_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, hf_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, hf_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, hf_rtp_jpeg_main_hdr_height, tvb, offset, 1, h);
+ offset += 1;
+
+ if (type >= 64 && type <= 127) {
+ ti = proto_tree_add_item(jpeg_tree, hf_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, hf_rtp_jpeg_restart_hdr_interval, tvb, offset, 2, ENC_BIG_ENDIAN);
+ offset += 2;
+ proto_tree_add_item(restart_hdr_tree, hf_rtp_jpeg_restart_hdr_f, tvb, offset, 2, ENC_BIG_ENDIAN);
+ proto_tree_add_item(restart_hdr_tree, hf_rtp_jpeg_restart_hdr_l, tvb, offset, 2, ENC_BIG_ENDIAN);
+ proto_tree_add_item(restart_hdr_tree, hf_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, hf_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, hf_rtp_jpeg_qtable_hdr_mbz, tvb, offset, 1, ENC_BIG_ENDIAN);
+ offset += 1;
+ proto_tree_add_item(qtable_hdr_tree, hf_rtp_jpeg_qtable_hdr_prec, tvb, offset, 1, ENC_BIG_ENDIAN);
+ offset += 1;
+ proto_tree_add_item(qtable_hdr_tree, hf_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, hf_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, hf_rtp_jpeg_payload, tvb, offset, -1, ENC_NA );
+ }
+ return tvb_captured_length(tvb);
+}
+
+void
+proto_register_jpeg(void)
+{
+ static hf_register_info hf[] = {
+ { &hf_rtp_jpeg_main_hdr,
+ { "Main Header", "jpeg.main_hdr",
+ FT_NONE, BASE_NONE, NULL, 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_main_hdr_ts,
+ { "Type Specific", "jpeg.main_hdr.ts",
+ FT_UINT8, BASE_DEC|BASE_RANGE_STRING, RVALS(jpeg_ts_rvals), 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_main_hdr_offs,
+ { "Fragment Offset", "jpeg.main_hdr.offset",
+ FT_UINT24, BASE_DEC, NULL, 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_main_hdr_type,
+ { "Type", "jpeg.main_hdr.type",
+ FT_UINT8, BASE_DEC|BASE_RANGE_STRING, RVALS(jpeg_type_rvals), 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_main_hdr_q,
+ { "Q", "jpeg.main_hdr.q",
+ FT_UINT8, BASE_DEC, NULL, 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_main_hdr_width,
+ { "Width", "jpeg.main_hdr.width",
+ FT_UINT8, BASE_DEC, NULL, 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_main_hdr_height,
+ { "Height", "jpeg.main_hdr.height",
+ FT_UINT8, BASE_DEC, NULL, 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_restart_hdr,
+ { "Restart Marker Header", "jpeg.restart_hdr",
+ FT_NONE, BASE_NONE, NULL, 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_restart_hdr_interval,
+ { "Restart Interval", "jpeg.restart_hdr.interval",
+ FT_UINT16, BASE_DEC, NULL, 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_restart_hdr_f,
+ { "F", "jpeg.restart_hdr.f",
+ FT_UINT16, BASE_DEC, NULL, 0x8000,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_restart_hdr_l,
+ { "L", "jpeg.restart_hdr.l",
+ FT_UINT16, BASE_DEC, NULL, 0x4000,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_restart_hdr_count,
+ { "Restart Count", "jpeg.restart_hdr.count",
+ FT_UINT16, BASE_DEC, NULL, 0x3FFF,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_qtable_hdr,
+ { "Quantization Table Header", "jpeg.qtable_hdr",
+ FT_NONE, BASE_NONE, NULL, 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_qtable_hdr_mbz,
+ { "MBZ", "jpeg.qtable_hdr.mbz",
+ FT_UINT8, BASE_DEC, NULL, 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_qtable_hdr_prec,
+ { "Precision", "jpeg.qtable_hdr.precision",
+ FT_UINT8, BASE_DEC, NULL, 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_qtable_hdr_length,
+ { "Length", "jpeg.qtable_hdr.length",
+ FT_UINT16, BASE_DEC, NULL, 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_qtable_hdr_data,
+ { "Quantization Table Data", "jpeg.qtable_hdr.data",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ NULL, HFILL }
+ },
+ { &hf_rtp_jpeg_payload,
+ { "Payload", "jpeg.payload",
+ FT_BYTES, BASE_NONE, NULL, 0,
+ NULL, HFILL }
+ },
+ };
+
+ static gint *ett[] = {
+ &ett_jpeg,
+ };
+
+ proto_jpeg = proto_register_protocol("RFC 2435 JPEG","JPEG","jpeg");
+ proto_register_field_array(proto_jpeg, hf, array_length(hf));
+ 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:
+ */
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