/* Do not modify this file. Changes will be overwritten. */ /* Generated automatically by the ASN.1 to Wireshark dissector compiler */ /* packet-mpeg-audio.c */ /* asn2wrs.py -L -p mpeg-audio -c ./mpeg-audio.cnf -s ./packet-mpeg-audio-template -D . -O ../.. mpeg-audio.asn */ /* MPEG audio packet decoder. * Written by Shaun Jackman . * Copyright 2007 Shaun Jackman * * Wireshark - Network traffic analyzer * By Gerald Combs * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "config.h" #include #include #include #include "packet-per.h" static int hf_mpeg_audio_sync = -1; /* BIT_STRING_SIZE_11 */ static int hf_mpeg_audio_version = -1; /* T_version */ static int hf_mpeg_audio_layer = -1; /* T_layer */ static int hf_mpeg_audio_protection = -1; /* T_protection */ static int hf_mpeg_audio_bitrate = -1; /* INTEGER_0_15 */ static int hf_mpeg_audio_frequency = -1; /* INTEGER_0_3 */ static int hf_mpeg_audio_padding = -1; /* BOOLEAN */ static int hf_mpeg_audio_private = -1; /* BOOLEAN */ static int hf_mpeg_audio_channel_mode = -1; /* T_channel_mode */ static int hf_mpeg_audio_mode_extension = -1; /* INTEGER_0_3 */ static int hf_mpeg_audio_copyright = -1; /* BOOLEAN */ static int hf_mpeg_audio_original = -1; /* BOOLEAN */ static int hf_mpeg_audio_emphasis = -1; /* T_emphasis */ static int hf_mpeg_audio_tag = -1; /* OCTET_STRING_SIZE_3 */ static int hf_mpeg_audio_title = -1; /* OCTET_STRING_SIZE_30 */ static int hf_mpeg_audio_artist = -1; /* OCTET_STRING_SIZE_30 */ static int hf_mpeg_audio_album = -1; /* OCTET_STRING_SIZE_30 */ static int hf_mpeg_audio_year = -1; /* OCTET_STRING_SIZE_4 */ static int hf_mpeg_audio_comment = -1; /* OCTET_STRING_SIZE_28 */ static int hf_mpeg_audio_must_be_zero = -1; /* INTEGER_0_255 */ static int hf_mpeg_audio_track = -1; /* INTEGER_0_255 */ static int hf_mpeg_audio_genre = -1; /* T_genre */ static gint ett_mpeg_audio_Audio = -1; static gint ett_mpeg_audio_ID3v1 = -1; static int dissect_mpeg_audio_BIT_STRING_SIZE_11(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_bit_string(tvb, offset, actx, tree, hf_index, 11, 11, FALSE, NULL, 0, NULL, NULL); return offset; } static const value_string mpeg_audio_T_version_vals[] = { { 0, "mpeg-2-5" }, { 1, "reserved" }, { 2, "mpeg-2" }, { 3, "mpeg-1" }, { 0, NULL } }; static int dissect_mpeg_audio_T_version(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_enumerated(tvb, offset, actx, tree, hf_index, 4, NULL, FALSE, 0, NULL); return offset; } static const value_string mpeg_audio_T_layer_vals[] = { { 0, "reserved" }, { 1, "layer-3" }, { 2, "layer-2" }, { 3, "layer-1" }, { 0, NULL } }; static int dissect_mpeg_audio_T_layer(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_enumerated(tvb, offset, actx, tree, hf_index, 4, NULL, FALSE, 0, NULL); return offset; } static const value_string mpeg_audio_T_protection_vals[] = { { 0, "crc" }, { 1, "none" }, { 0, NULL } }; static int dissect_mpeg_audio_T_protection(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_enumerated(tvb, offset, actx, tree, hf_index, 2, NULL, FALSE, 0, NULL); return offset; } static int dissect_mpeg_audio_INTEGER_0_15(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_constrained_integer(tvb, offset, actx, tree, hf_index, 0U, 15U, NULL, FALSE); return offset; } static int dissect_mpeg_audio_INTEGER_0_3(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_constrained_integer(tvb, offset, actx, tree, hf_index, 0U, 3U, NULL, FALSE); return offset; } static int dissect_mpeg_audio_BOOLEAN(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_boolean(tvb, offset, actx, tree, hf_index, NULL); return offset; } static const value_string mpeg_audio_T_channel_mode_vals[] = { { 0, "stereo" }, { 1, "joint-stereo" }, { 2, "dual-channel" }, { 3, "single-channel" }, { 0, NULL } }; static int dissect_mpeg_audio_T_channel_mode(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_enumerated(tvb, offset, actx, tree, hf_index, 4, NULL, FALSE, 0, NULL); return offset; } static const value_string mpeg_audio_T_emphasis_vals[] = { { 0, "none" }, { 1, "em-50-15-ms" }, { 2, "reserved" }, { 3, "ccit-j-17" }, { 0, NULL } }; static int dissect_mpeg_audio_T_emphasis(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_enumerated(tvb, offset, actx, tree, hf_index, 4, NULL, FALSE, 0, NULL); return offset; } static const per_sequence_t Audio_sequence[] = { { &hf_mpeg_audio_sync , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_BIT_STRING_SIZE_11 }, { &hf_mpeg_audio_version , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_T_version }, { &hf_mpeg_audio_layer , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_T_layer }, { &hf_mpeg_audio_protection, ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_T_protection }, { &hf_mpeg_audio_bitrate , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_INTEGER_0_15 }, { &hf_mpeg_audio_frequency, ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_INTEGER_0_3 }, { &hf_mpeg_audio_padding , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_BOOLEAN }, { &hf_mpeg_audio_private , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_BOOLEAN }, { &hf_mpeg_audio_channel_mode, ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_T_channel_mode }, { &hf_mpeg_audio_mode_extension, ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_INTEGER_0_3 }, { &hf_mpeg_audio_copyright, ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_BOOLEAN }, { &hf_mpeg_audio_original , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_BOOLEAN }, { &hf_mpeg_audio_emphasis , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_T_emphasis }, { NULL, 0, 0, NULL } }; static int dissect_mpeg_audio_Audio(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_sequence(tvb, offset, actx, tree, hf_index, ett_mpeg_audio_Audio, Audio_sequence); return offset; } static int dissect_mpeg_audio_OCTET_STRING_SIZE_3(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_octet_string(tvb, offset, actx, tree, hf_index, 3, 3, FALSE, NULL); return offset; } static int dissect_mpeg_audio_OCTET_STRING_SIZE_30(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_octet_string(tvb, offset, actx, tree, hf_index, 30, 30, FALSE, NULL); return offset; } static int dissect_mpeg_audio_OCTET_STRING_SIZE_4(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_octet_string(tvb, offset, actx, tree, hf_index, 4, 4, FALSE, NULL); return offset; } static int dissect_mpeg_audio_OCTET_STRING_SIZE_28(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_octet_string(tvb, offset, actx, tree, hf_index, 28, 28, FALSE, NULL); return offset; } static int dissect_mpeg_audio_INTEGER_0_255(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_constrained_integer(tvb, offset, actx, tree, hf_index, 0U, 255U, NULL, FALSE); return offset; } static const value_string mpeg_audio_T_genre_vals[] = { { 0, "blues" }, { 1, "classic-rock" }, { 2, "country" }, { 3, "dance" }, { 4, "disco" }, { 5, "funk" }, { 6, "grunge" }, { 7, "hip-hop" }, { 8, "jazz" }, { 9, "metal" }, { 10, "new-age" }, { 11, "oldies" }, { 12, "other" }, { 13, "pop" }, { 14, "r-and-b" }, { 15, "rap" }, { 16, "reggae" }, { 17, "rock" }, { 18, "techno" }, { 19, "industrial" }, { 20, "alternative" }, { 21, "ska" }, { 22, "death-metal" }, { 23, "pranks" }, { 24, "soundtrack" }, { 25, "euro-techno" }, { 26, "ambient" }, { 27, "trip-hop" }, { 28, "vocal" }, { 29, "jazz-and-funk" }, { 30, "fusion" }, { 31, "trance" }, { 32, "classical" }, { 33, "instrumental" }, { 34, "acid" }, { 35, "house" }, { 36, "game" }, { 37, "sound-clip" }, { 38, "gospel" }, { 39, "noise" }, { 40, "alternative-rock" }, { 41, "bass" }, { 42, "soul" }, { 43, "punk" }, { 44, "space" }, { 45, "meditative" }, { 46, "instrumental-pop" }, { 47, "instrumental-rock" }, { 48, "ethnic" }, { 49, "gothic" }, { 50, "darkwave" }, { 51, "techno-industrial" }, { 52, "electronic" }, { 53, "pop-folk" }, { 54, "eurodance" }, { 55, "dream" }, { 56, "southern-rock" }, { 57, "comedy" }, { 58, "cult" }, { 59, "gangsta" }, { 60, "top-40" }, { 61, "christian-rap" }, { 62, "pop-funk" }, { 63, "jungle" }, { 64, "native-american" }, { 65, "cabaret" }, { 66, "new-wave" }, { 67, "psychedelic" }, { 68, "rave" }, { 69, "showtunes" }, { 70, "trailer" }, { 71, "lo-fi" }, { 72, "tribal" }, { 73, "acid-punk" }, { 74, "acid-jazz" }, { 75, "polka" }, { 76, "retro" }, { 77, "musical" }, { 78, "rock-and-roll" }, { 79, "hard-rock" }, { 80, "folk" }, { 81, "folk-rock" }, { 82, "national-folk" }, { 83, "swing" }, { 84, "fast-fusion" }, { 85, "bebob" }, { 86, "latin" }, { 87, "revival" }, { 88, "celtic" }, { 89, "bluegrass" }, { 90, "avantgarde" }, { 91, "gothic-rock" }, { 92, "progressive-rock" }, { 93, "psychedelic-rock" }, { 94, "symphonic-rock" }, { 95, "slow-rock" }, { 96, "big-band" }, { 97, "chorus" }, { 98, "easy-listening" }, { 99, "acoustic" }, { 100, "humour" }, { 101, "speech" }, { 102, "chanson" }, { 103, "opera" }, { 104, "chamber-music" }, { 105, "sonata" }, { 106, "symphony" }, { 107, "booty-bass" }, { 108, "primus" }, { 109, "porn-groove" }, { 110, "satire" }, { 111, "slow-jam" }, { 112, "club" }, { 113, "tango" }, { 114, "samba" }, { 115, "folklore" }, { 116, "ballad" }, { 117, "power-ballad" }, { 118, "rhythmic-soul" }, { 119, "freestyle" }, { 120, "duet" }, { 121, "punk-rock" }, { 122, "drum-solo" }, { 123, "a-cappella" }, { 124, "euro-house" }, { 125, "dance-hall" }, { 0, NULL } }; static int dissect_mpeg_audio_T_genre(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_constrained_integer(tvb, offset, actx, tree, hf_index, 0U, 255U, NULL, FALSE); return offset; } static const per_sequence_t ID3v1_sequence[] = { { &hf_mpeg_audio_tag , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_OCTET_STRING_SIZE_3 }, { &hf_mpeg_audio_title , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_OCTET_STRING_SIZE_30 }, { &hf_mpeg_audio_artist , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_OCTET_STRING_SIZE_30 }, { &hf_mpeg_audio_album , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_OCTET_STRING_SIZE_30 }, { &hf_mpeg_audio_year , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_OCTET_STRING_SIZE_4 }, { &hf_mpeg_audio_comment , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_OCTET_STRING_SIZE_28 }, { &hf_mpeg_audio_must_be_zero, ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_INTEGER_0_255 }, { &hf_mpeg_audio_track , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_INTEGER_0_255 }, { &hf_mpeg_audio_genre , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_mpeg_audio_T_genre }, { NULL, 0, 0, NULL } }; static int dissect_mpeg_audio_ID3v1(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_sequence(tvb, offset, actx, tree, hf_index, ett_mpeg_audio_ID3v1, ID3v1_sequence); return offset; } void proto_register_mpeg_audio(void); void proto_reg_handoff_mpeg_audio(void); dissector_handle_t mpeg_audio_handle; static int proto_mpeg_audio = -1; static dissector_handle_t id3v2_handle; static int hf_mpeg_audio_header = -1; static int hf_mpeg_audio_data = -1; static int hf_mpeg_audio_padbytes = -1; static int hf_id3v1 = -1; static int ett_mpeg_audio = -1; static gboolean test_mpeg_audio(tvbuff_t *tvb, int offset) { guint32 hdr; struct mpa mpa; if (!tvb_bytes_exist(tvb, offset, 4)) return FALSE; if (tvb_strneql(tvb, offset, "TAG", 3) == 0) return TRUE; if (tvb_strneql(tvb, offset, "ID3", 3) == 0) return TRUE; hdr = tvb_get_guint32(tvb, offset, ENC_BIG_ENDIAN); MPA_UNMARSHAL(&mpa, hdr); return MPA_VALID(&mpa); } static int mpeg_resync(tvbuff_t *tvb, int offset) { guint32 hdr; struct mpa mpa; /* This only looks to resync on another frame; it doesn't * look for an ID3 tag. */ offset = tvb_find_guint8(tvb, offset, -1, '\xff'); while (offset != -1 && tvb_bytes_exist(tvb, offset, 4)) { hdr = tvb_get_guint32(tvb, offset, ENC_BIG_ENDIAN); MPA_UNMARSHAL(&mpa, hdr); if (MPA_VALID(&mpa)) { return offset; } offset = tvb_find_guint8(tvb, offset + 1, -1, '\xff'); } return tvb_reported_length(tvb); } static int dissect_mpeg_audio_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { guint32 h; struct mpa mpa; int data_size = 0; asn1_ctx_t asn1_ctx; int offset = 0; static const char *version_names[] = { "1", "2", "2.5" }; if (!tvb_bytes_exist(tvb, 0, 4)) return 0; h = tvb_get_ntohl(tvb, 0); MPA_UNMARSHAL(&mpa, h); if (!MPA_SYNC_VALID(&mpa) || !MPA_VERSION_VALID(&mpa) || !MPA_LAYER_VALID(&mpa)) { return 0; } col_add_fstr(pinfo->cinfo, COL_PROTOCOL, "MPEG-%s", version_names[mpa_version(&mpa)]); col_add_fstr(pinfo->cinfo, COL_INFO, "Audio Layer %d", mpa_layer(&mpa) + 1); if (MPA_BITRATE_VALID(&mpa) && MPA_FREQUENCY_VALID(&mpa)) { data_size = (int)(MPA_DATA_BYTES(&mpa) - sizeof mpa); col_append_fstr(pinfo->cinfo, COL_INFO, ", %d kb/s, %g kHz", mpa_bitrate(&mpa) / 1000, mpa_frequency(&mpa) / (float)1000); } asn1_ctx_init(&asn1_ctx, ASN1_ENC_PER, TRUE, pinfo); offset = dissect_mpeg_audio_Audio(tvb, offset, &asn1_ctx, tree, hf_mpeg_audio_header); if (data_size > 0) { unsigned int padding; proto_tree_add_item(tree, hf_mpeg_audio_data, tvb, offset / 8, data_size, ENC_NA); offset += data_size * 8; padding = mpa_padding(&mpa); if (padding > 0) { proto_tree_add_item(tree, hf_mpeg_audio_padbytes, tvb, offset / 8, padding, ENC_NA); offset += padding * 8; } } return offset / 8; } static int dissect_id3v1(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { asn1_ctx_t asn1_ctx; col_set_str(pinfo->cinfo, COL_PROTOCOL, "ID3v1"); col_clear(pinfo->cinfo, COL_INFO); asn1_ctx_init(&asn1_ctx, ASN1_ENC_PER, TRUE, pinfo); return dissect_mpeg_audio_ID3v1(tvb, 0, &asn1_ctx, tree, hf_id3v1); } static int dissect_mpeg_audio(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { proto_item *ti; proto_tree *mpeg_audio_tree; int magic, offset = 0; guint32 frame_len; tvbuff_t *next_tvb; ti = proto_tree_add_item(tree, proto_mpeg_audio, tvb, offset, -1, ENC_NA); mpeg_audio_tree = proto_item_add_subtree(ti, ett_mpeg_audio); while (tvb_reported_length_remaining(tvb, offset) >= 4) { next_tvb = tvb_new_subset_remaining(tvb, offset); magic = tvb_get_ntoh24(next_tvb, 0); switch (magic) { case 0x544147: /* TAG */ offset += dissect_id3v1(next_tvb, pinfo, mpeg_audio_tree); break; case 0x494433: /* ID3 */ offset += call_dissector(id3v2_handle, tvb, pinfo, mpeg_audio_tree); break; default: frame_len = dissect_mpeg_audio_frame(next_tvb, pinfo, mpeg_audio_tree); if (frame_len == 0) { frame_len = mpeg_resync(next_tvb, 0); } offset += frame_len; } } return tvb_reported_length(tvb); } static gboolean dissect_mpeg_audio_heur(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { if (!test_mpeg_audio(tvb, 0)) { return FALSE; } dissect_mpeg_audio(tvb, pinfo, tree, data); return TRUE; } void proto_register_mpeg_audio(void) { static hf_register_info hf[] = { { &hf_mpeg_audio_sync, { "sync", "mpeg-audio.sync", FT_BYTES, BASE_NONE, NULL, 0, "BIT_STRING_SIZE_11", HFILL }}, { &hf_mpeg_audio_version, { "version", "mpeg-audio.version", FT_UINT32, BASE_DEC, VALS(mpeg_audio_T_version_vals), 0, NULL, HFILL }}, { &hf_mpeg_audio_layer, { "layer", "mpeg-audio.layer", FT_UINT32, BASE_DEC, VALS(mpeg_audio_T_layer_vals), 0, NULL, HFILL }}, { &hf_mpeg_audio_protection, { "protection", "mpeg-audio.protection", FT_UINT32, BASE_DEC, VALS(mpeg_audio_T_protection_vals), 0, NULL, HFILL }}, { &hf_mpeg_audio_bitrate, { "bitrate", "mpeg-audio.bitrate", FT_UINT32, BASE_DEC, NULL, 0, "INTEGER_0_15", HFILL }}, { &hf_mpeg_audio_frequency, { "frequency", "mpeg-audio.frequency", FT_UINT32, BASE_DEC, NULL, 0, "INTEGER_0_3", HFILL }}, { &hf_mpeg_audio_padding, { "padding", "mpeg-audio.padding", FT_BOOLEAN, BASE_NONE, NULL, 0, "BOOLEAN", HFILL }}, { &hf_mpeg_audio_private, { "private", "mpeg-audio.private", FT_BOOLEAN, BASE_NONE, NULL, 0, "BOOLEAN", HFILL }}, { &hf_mpeg_audio_channel_mode, { "channel-mode", "mpeg-audio.channel_mode", FT_UINT32, BASE_DEC, VALS(mpeg_audio_T_channel_mode_vals), 0, NULL, HFILL }}, { &hf_mpeg_audio_mode_extension, { "mode-extension", "mpeg-audio.mode_extension", FT_UINT32, BASE_DEC, NULL, 0, "INTEGER_0_3", HFILL }}, { &hf_mpeg_audio_copyright, { "copyright", "mpeg-audio.copyright", FT_BOOLEAN, BASE_NONE, NULL, 0, "BOOLEAN", HFILL }}, { &hf_mpeg_audio_original, { "original", "mpeg-audio.original", FT_BOOLEAN, BASE_NONE, NULL, 0, "BOOLEAN", HFILL }}, { &hf_mpeg_audio_emphasis, { "emphasis", "mpeg-audio.emphasis", FT_UINT32, BASE_DEC, VALS(mpeg_audio_T_emphasis_vals), 0, NULL, HFILL }}, { &hf_mpeg_audio_tag, { "tag", "mpeg-audio.tag", FT_STRING, BASE_NONE, NULL, 0, "OCTET_STRING_SIZE_3", HFILL }}, { &hf_mpeg_audio_title, { "title", "mpeg-audio.title", FT_STRING, BASE_NONE, NULL, 0, "OCTET_STRING_SIZE_30", HFILL }}, { &hf_mpeg_audio_artist, { "artist", "mpeg-audio.artist", FT_STRING, BASE_NONE, NULL, 0, "OCTET_STRING_SIZE_30", HFILL }}, { &hf_mpeg_audio_album, { "album", "mpeg-audio.album", FT_STRING, BASE_NONE, NULL, 0, "OCTET_STRING_SIZE_30", HFILL }}, { &hf_mpeg_audio_year, { "year", "mpeg-audio.year", FT_STRING, BASE_NONE, NULL, 0, "OCTET_STRING_SIZE_4", HFILL }}, { &hf_mpeg_audio_comment, { "comment", "mpeg-audio.comment", FT_STRING, BASE_NONE, NULL, 0, "OCTET_STRING_SIZE_28", HFILL }}, { &hf_mpeg_audio_must_be_zero, { "must-be-zero", "mpeg-audio.must_be_zero", FT_UINT32, BASE_DEC, NULL, 0, "INTEGER_0_255", HFILL }}, { &hf_mpeg_audio_track, { "track", "mpeg-audio.track", FT_UINT32, BASE_DEC, NULL, 0, "INTEGER_0_255", HFILL }}, { &hf_mpeg_audio_genre, { "genre", "mpeg-audio.genre", FT_UINT32, BASE_DEC, VALS(mpeg_audio_T_genre_vals), 0, NULL, HFILL }}, { &hf_mpeg_audio_header, { "Frame Header", "mpeg-audio.header", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_audio_data, { "Data", "mpeg-audio.data", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_mpeg_audio_padbytes, { "Padding", "mpeg-audio.padbytes", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_id3v1, { "ID3v1", "mpeg-audio.id3v1", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, }; static gint *ett[] = { &ett_mpeg_audio, &ett_mpeg_audio_Audio, &ett_mpeg_audio_ID3v1, }; proto_mpeg_audio = proto_register_protocol( "Moving Picture Experts Group Audio", "MPEG Audio", "mpeg-audio"); proto_register_field_array(proto_mpeg_audio, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); mpeg_audio_handle = register_dissector("mpeg-audio", dissect_mpeg_audio, proto_mpeg_audio); } void proto_reg_handoff_mpeg_audio(void) { dissector_add_string("media_type", "audio/mpeg", mpeg_audio_handle); /* "audio/mp3" used by Chrome before 2020 */ /* https://chromium.googlesource.com/chromium/src/+/842f46a95f49e24534ad35c7a71e5c425d426550 */ dissector_add_string("media_type", "audio/mp3", mpeg_audio_handle); heur_dissector_add("mpeg", dissect_mpeg_audio_heur, "MPEG Audio", "mpeg_audio", proto_mpeg_audio, HEURISTIC_ENABLE); id3v2_handle = find_dissector("id3v2"); }