diff options
Diffstat (limited to 'epan/dissectors/packet-mpeg-pat.c')
| -rw-r--r-- | epan/dissectors/packet-mpeg-pat.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/epan/dissectors/packet-mpeg-pat.c b/epan/dissectors/packet-mpeg-pat.c new file mode 100644 index 0000000000..009b00d76d --- /dev/null +++ b/epan/dissectors/packet-mpeg-pat.c @@ -0,0 +1,205 @@ +/* packet-mpeg-pat.c + * Routines for MPEG2 (ISO/ISO 13818-1) Program Associate Table (PAT) dissection + * Copyright 2012, Guy Martin <gmsoft@tuxicoman.be> + * + * $Id$ + * + * Wireshark - Network traffic analyzer + * By Gerald Combs <gerald@wireshark.org> + * Copyright 1998 Gerald Combs + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <glib.h> + +#include <epan/packet.h> +#include <epan/prefs.h> + +static int proto_mpeg_pat = -1; +static int hf_mpeg_pat_transport_stream_id = -1; +static int hf_mpeg_pat_reserved = -1; +static int hf_mpeg_pat_version_number = -1; +static int hf_mpeg_pat_current_next_indicator = -1; +static int hf_mpeg_pat_section_number = -1; +static int hf_mpeg_pat_last_section_number = -1; + +static int hf_mpeg_pat_program_number = -1; +static int hf_mpeg_pat_program_reserved = -1; +static int hf_mpeg_pat_program_map_pid = -1; + + +static gint ett_mpeg_pat = -1; +static gint ett_mpeg_pat_prog = -1; + +#define MPEG_PAT_TID 0x00 + +#define MPEG_PAT_RESERVED_MASK 0xC0 +#define MPEG_PAT_VERSION_NUMBER_MASK 0x3E +#define MPEG_PAT_CURRENT_NEXT_INDICATOR_MASK 0x01 + +#define MPEG_PAT_PROGRAM_RESERVED_MASK 0xE000 +#define MPEG_PAT_PROGRAM_MAP_PID_MASK 0x1FFF + +static const value_string mpeg_pat_cur_next_vals[] = { + + { 0x0, "Not yet applicable" }, + { 0x1, "Currently applicable" }, + +}; + +void +dissect_mpeg_pat(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + + guint offset = 0, length = 0; + guint16 prog_num = 0, prog_pid; + + proto_item *ti = NULL; + proto_tree *mpeg_pat_tree = NULL; + proto_item *pi = NULL; + proto_tree *mpeg_pat_prog_tree = NULL; + + /* The TVB should start right after the section_length in the Section packet */ + + col_clear(pinfo->cinfo, COL_INFO); + col_set_str(pinfo->cinfo, COL_INFO, "Program Association Table (PAT)"); + + ti = proto_tree_add_item(tree, proto_mpeg_pat, tvb, offset, -1, ENC_NA); + mpeg_pat_tree = proto_item_add_subtree(ti, ett_mpeg_pat); + + if (!tree) + return; + + length = tvb_length_remaining(tvb, offset); + + proto_tree_add_item(mpeg_pat_tree, hf_mpeg_pat_transport_stream_id, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + proto_tree_add_item(mpeg_pat_tree, hf_mpeg_pat_reserved, tvb, offset, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(mpeg_pat_tree, hf_mpeg_pat_version_number, tvb, offset, 1, ENC_BIG_ENDIAN); + proto_tree_add_item(mpeg_pat_tree, hf_mpeg_pat_current_next_indicator, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + + proto_tree_add_item(mpeg_pat_tree, hf_mpeg_pat_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + + proto_tree_add_item(mpeg_pat_tree, hf_mpeg_pat_last_section_number, tvb, offset, 1, ENC_BIG_ENDIAN); + offset++; + + if (offset >= length) + return; + + + /* Parse all the programs */ + while (offset < length) { + + prog_num = tvb_get_ntohs(tvb, offset); + prog_pid = tvb_get_ntohs(tvb, offset + 2) & MPEG_PAT_PROGRAM_MAP_PID_MASK; + + pi = proto_tree_add_text(mpeg_pat_tree, tvb, offset, 4, "Program 0x%04hx -> PID 0x%04hx", prog_num, prog_pid); + mpeg_pat_prog_tree = proto_item_add_subtree(pi, ett_mpeg_pat_prog); + + proto_tree_add_item(mpeg_pat_prog_tree, hf_mpeg_pat_program_number, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + proto_tree_add_item(mpeg_pat_prog_tree, hf_mpeg_pat_program_reserved, tvb, offset, 2, ENC_BIG_ENDIAN); + proto_tree_add_item(mpeg_pat_prog_tree, hf_mpeg_pat_program_map_pid, tvb, offset, 2, ENC_BIG_ENDIAN); + offset += 2; + + } + + return; + +} + + +void +proto_register_mpeg_pat(void) +{ + + static hf_register_info hf[] = { + + { &hf_mpeg_pat_transport_stream_id, { + "Transport Stream ID", "mpeg_pat.tsid", + FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_mpeg_pat_reserved, { + "Reserved", "mpeg_pat.reserved", + FT_UINT8, BASE_HEX, NULL, MPEG_PAT_RESERVED_MASK, NULL, HFILL + } }, + + { &hf_mpeg_pat_version_number, { + "Version Number", "mpeg_pat.version", + FT_UINT8, BASE_HEX, NULL, MPEG_PAT_VERSION_NUMBER_MASK, NULL, HFILL + } }, + + { &hf_mpeg_pat_current_next_indicator, { + "Current/Next Indicator", "mpeg_pat.cur_next_ind", + FT_UINT8, BASE_HEX, VALS(mpeg_pat_cur_next_vals), MPEG_PAT_CURRENT_NEXT_INDICATOR_MASK, NULL, HFILL + } }, + + { &hf_mpeg_pat_section_number, { + "Section Number", "mpeg_pat.sect_num", + FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL + } }, + + { &hf_mpeg_pat_last_section_number, { + "Last Section Number", "mpeg_pat.last_sect_num", + FT_UINT8, BASE_DEC, NULL, 0, NULL, HFILL + } }, + + { &hf_mpeg_pat_program_number, { + "Program Number", "mpeg_pat.prog_num", + FT_UINT16, BASE_HEX, NULL, 0, NULL, HFILL + } }, + + { &hf_mpeg_pat_program_reserved, { + "Reserved", "mpeg_pat.prog_reserved", + FT_UINT16, BASE_HEX, NULL, MPEG_PAT_PROGRAM_RESERVED_MASK, NULL, HFILL + } }, + + { &hf_mpeg_pat_program_map_pid, { + "Program Map PID", "mpeg_pat.prog_map_pid", + FT_UINT16, BASE_HEX, NULL, MPEG_PAT_PROGRAM_MAP_PID_MASK, NULL, HFILL + } }, + + }; + + static gint *ett[] = { + &ett_mpeg_pat, + &ett_mpeg_pat_prog + }; + + proto_mpeg_pat = proto_register_protocol("MPEG2 Program Association Table", "MPEG PAT", "mpeg_pat"); + + proto_register_field_array(proto_mpeg_pat, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + +} + + +void proto_reg_handoff_mpeg_pat(void) +{ + dissector_handle_t mpeg_pat_handle; + + mpeg_pat_handle = create_dissector_handle(dissect_mpeg_pat, proto_mpeg_pat); + dissector_add_uint("mpeg_sect.tid", MPEG_PAT_TID, mpeg_pat_handle); +} |