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wireshark/epan/dissectors/packet-dvb-s2-bb.c

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/* packet-dvb-s2-bb.c
* Routines for DVB Dynamic Mode Adaptation dissection
* refer to
* https://web.archive.org/web/20170226064346/http://satlabs.org/pdf/sl_561_Mode_Adaptation_Input_and_Output_Interfaces_for_DVB-S2_Equipment_v1.3.pdf
*
* (http://satlabs.org/pdf/sl_561_Mode_Adaptation_Input_and_Output_Interfaces_for_DVB-S2_Equipment_v1.3.pdf
* is no longer available)
*
* Standards:
* ETSI EN 302 307 - Digital Video Broadcasting (DVB) - Framing Structure
* ETSI TS 102 606-1 - Digital Video Broadcasting (DVB) - Generic Stream Encapsulation (GSE) Part 1: Protocol
* ETSI TS 102 771 - Digital Video Broadcasting (DVB) - GSE implementation guidelines
* SatLabs sl_561 - Mode Adaptation Interfaces for DVB-S2 equipment
* ETSI EN 301 545 - Digital Video Broadcasting (DVB) - Second Generation DVB Interactive Satellite System (DVB-RCS2)
* RFC 4326 - Unidirectional Lightweight Encapsulation (ULE) for Transmission of IP Datagrams over an MPEG-2 Transport Stream (TS)
* IANA registries:
*
* Mandatory Extension Headers (or link-dependent type fields) for ULE (Range 0-255 decimal):
*
* https://www.iana.org/assignments/ule-next-headers/ule-next-headers.xhtml#ule-next-headers-1
*
* and
*
* Optional Extension Headers for ULE (Range 256-511 decimal):
*
* https://www.iana.org/assignments/ule-next-headers/ule-next-headers.xhtml#ule-next-headers-2
*
* Copyright 2012, Tobias Rutz <tobias.rutz@work-microwave.de>
* Copyright 2013-2020, Thales Alenia Space
* Copyright 2013-2020, Viveris Technologies <adrien.destugues@opensource.viveris.fr>
*
* 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/prefs.h>
#include <epan/etypes.h>
#include <epan/expert.h>
#include <epan/reassemble.h>
#define BIT_IS_SET(var, bit) ((var) & (1 << (bit)))
#define BIT_IS_CLEAR(var, bit) !BIT_IS_SET(var, bit)
#define DVB_S2_MODEADAPT_MINSIZE (DVB_S2_BB_OFFS_CRC + 1)
/* Types of mode adaptation headers supported. */
#define DVB_S2_MODEADAPT_TYPE_L1 1
#define DVB_S2_MODEADAPT_TYPE_L2 2
#define DVB_S2_MODEADAPT_TYPE_L3 3
#define DVB_S2_MODEADAPT_TYPE_L4 4
#define DVB_S2_MODEADAPT_L1SIZE 0
#define DVB_S2_MODEADAPT_L2SIZE 2
#define DVB_S2_MODEADAPT_L3SIZE 4
#define DVB_S2_MODEADAPT_L4SIZE 3
/* CRC table crc-8, poly=0xD5 */
static guint8 crc8_table[256] = {
0x00, 0xD5, 0x7F, 0xAA, 0xFE, 0x2B, 0x81, 0x54, 0x29, 0xFC, 0x56, 0x83, 0xD7, 0x02, 0xA8, 0x7D,
0x52, 0x87, 0x2D, 0xF8, 0xAC, 0x79, 0xD3, 0x06, 0x7B, 0xAE, 0x04, 0xD1, 0x85, 0x50, 0xFA, 0x2F,
0xA4, 0x71, 0xDB, 0x0E, 0x5A, 0x8F, 0x25, 0xF0, 0x8D, 0x58, 0xF2, 0x27, 0x73, 0xA6, 0x0C, 0xD9,
0xF6, 0x23, 0x89, 0x5C, 0x08, 0xDD, 0x77, 0xA2, 0xDF, 0x0A, 0xA0, 0x75, 0x21, 0xF4, 0x5E, 0x8B,
0x9D, 0x48, 0xE2, 0x37, 0x63, 0xB6, 0x1C, 0xC9, 0xB4, 0x61, 0xCB, 0x1E, 0x4A, 0x9F, 0x35, 0xE0,
0xCF, 0x1A, 0xB0, 0x65, 0x31, 0xE4, 0x4E, 0x9B, 0xE6, 0x33, 0x99, 0x4C, 0x18, 0xCD, 0x67, 0xB2,
0x39, 0xEC, 0x46, 0x93, 0xC7, 0x12, 0xB8, 0x6D, 0x10, 0xC5, 0x6F, 0xBA, 0xEE, 0x3B, 0x91, 0x44,
0x6B, 0xBE, 0x14, 0xC1, 0x95, 0x40, 0xEA, 0x3F, 0x42, 0x97, 0x3D, 0xE8, 0xBC, 0x69, 0xC3, 0x16,
0xEF, 0x3A, 0x90, 0x45, 0x11, 0xC4, 0x6E, 0xBB, 0xC6, 0x13, 0xB9, 0x6C, 0x38, 0xED, 0x47, 0x92,
0xBD, 0x68, 0xC2, 0x17, 0x43, 0x96, 0x3C, 0xE9, 0x94, 0x41, 0xEB, 0x3E, 0x6A, 0xBF, 0x15, 0xC0,
0x4B, 0x9E, 0x34, 0xE1, 0xB5, 0x60, 0xCA, 0x1F, 0x62, 0xB7, 0x1D, 0xC8, 0x9C, 0x49, 0xE3, 0x36,
0x19, 0xCC, 0x66, 0xB3, 0xE7, 0x32, 0x98, 0x4D, 0x30, 0xE5, 0x4F, 0x9A, 0xCE, 0x1B, 0xB1, 0x64,
0x72, 0xA7, 0x0D, 0xD8, 0x8C, 0x59, 0xF3, 0x26, 0x5B, 0x8E, 0x24, 0xF1, 0xA5, 0x70, 0xDA, 0x0F,
0x20, 0xF5, 0x5F, 0x8A, 0xDE, 0x0B, 0xA1, 0x74, 0x09, 0xDC, 0x76, 0xA3, 0xF7, 0x22, 0x88, 0x5D,
0xD6, 0x03, 0xA9, 0x7C, 0x28, 0xFD, 0x57, 0x82, 0xFF, 0x2A, 0x80, 0x55, 0x01, 0xD4, 0x7E, 0xAB,
0x84, 0x51, 0xFB, 0x2E, 0x7A, 0xAF, 0x05, 0xD0, 0xAD, 0x78, 0xD2, 0x07, 0x53, 0x86, 0x2C, 0xF9
};
static dissector_handle_t ip_handle;
static dissector_handle_t ipv6_handle;
static dissector_handle_t eth_withoutfcs_handle;
static dissector_handle_t dvb_s2_table_handle;
static dissector_handle_t data_handle;
void proto_register_dvb_s2_modeadapt(void);
void proto_reg_handoff_dvb_s2_modeadapt(void);
/* preferences */
#define DVB_S2_RCS_TABLE_DECODING 0
#define DVB_S2_RCS2_TABLE_DECODING 1
static gboolean dvb_s2_full_dissection = FALSE;
static gboolean dvb_s2_df_dissection = FALSE;
/* Initialize the protocol and registered fields */
static int proto_dvb_s2_modeadapt = -1;
static int hf_dvb_s2_modeadapt_sync = -1;
static int hf_dvb_s2_modeadapt_acm = -1;
static int hf_dvb_s2_modeadapt_acm_fecframe = -1;
static int hf_dvb_s2_modeadapt_acm_pilot = -1;
static int hf_dvb_s2_modeadapt_acm_modcod = -1;
static int hf_dvb_s2_modeadapt_acm_modcod_s2x = -1;
static int hf_dvb_s2_modeadapt_cni = -1;
static int hf_dvb_s2_modeadapt_frameno = -1;
static int proto_dvb_s2_bb = -1;
static int hf_dvb_s2_bb_matype1 = -1;
static int hf_dvb_s2_bb_matype1_gs = -1;
static int hf_dvb_s2_bb_matype1_mis = -1;
static int hf_dvb_s2_bb_matype1_acm = -1;
static int hf_dvb_s2_bb_matype1_issyi = -1;
static int hf_dvb_s2_bb_matype1_npd = -1;
static int hf_dvb_s2_bb_matype1_high_ro = -1;
static int hf_dvb_s2_bb_matype1_low_ro = -1;
static int hf_dvb_s2_bb_matype2 = -1;
static int hf_dvb_s2_bb_upl = -1;
static int hf_dvb_s2_bb_dfl = -1;
static int hf_dvb_s2_bb_sync = -1;
static int hf_dvb_s2_bb_syncd = -1;
static int hf_dvb_s2_bb_crc = -1;
static int hf_dvb_s2_bb_crc_status = -1;
static int hf_dvb_s2_bb_df = -1;
static int hf_dvb_s2_bb_eip_crc32 = -1;
static int hf_dvb_s2_bb_packetized = -1;
static int hf_dvb_s2_bb_transport = -1;
static int hf_dvb_s2_bb_reserved = -1;
static int proto_dvb_s2_gse = -1;
static int hf_dvb_s2_gse_hdr = -1;
static int hf_dvb_s2_gse_hdr_start = -1;
static int hf_dvb_s2_gse_hdr_stop = -1;
static int hf_dvb_s2_gse_hdr_labeltype = -1;
static int hf_dvb_s2_gse_hdr_length = -1;
static int hf_dvb_s2_gse_padding = -1;
static int hf_dvb_s2_gse_proto_next_header = -1;
static int hf_dvb_s2_gse_proto_ethertype = -1;
static int hf_dvb_s2_gse_label6 = -1;
static int hf_dvb_s2_gse_label3 = -1;
static int hf_dvb_s2_gse_fragid = -1;
static int hf_dvb_s2_gse_totlength = -1;
static int hf_dvb_s2_gse_exthdr = -1;
static int hf_dvb_s2_gse_ncr = -1;
static int hf_dvb_s2_gse_data = -1;
static int hf_dvb_s2_gse_crc32 = -1;
/* Initialize the subtree pointers */
static gint ett_dvb_s2_modeadapt = -1;
static gint ett_dvb_s2_modeadapt_acm = -1;
static gint ett_dvb_s2_bb = -1;
static gint ett_dvb_s2_bb_matype1 = -1;
static gint ett_dvb_s2_gse = -1;
static gint ett_dvb_s2_gse_hdr = -1;
static gint ett_dvb_s2_gse_ncr = -1;
static expert_field ei_dvb_s2_bb_crc = EI_INIT;
static expert_field ei_dvb_s2_bb_header_ambiguous = EI_INIT;
static expert_field ei_dvb_s2_bb_issy_invalid = EI_INIT;
static expert_field ei_dvb_s2_bb_npd_invalid = EI_INIT;
static expert_field ei_dvb_s2_bb_upl_invalid = EI_INIT;
static expert_field ei_dvb_s2_bb_reserved = EI_INIT;
/* Reassembly support */
static reassembly_table dvbs2_reassembly_table;
static void
dvbs2_defragment_init(void)
{
reassembly_table_init(&dvbs2_reassembly_table,
&addresses_reassembly_table_functions);
}
static gint ett_dvbs2_fragments = -1;
static gint ett_dvbs2_fragment = -1;
static int hf_dvbs2_fragments = -1;
static int hf_dvbs2_fragment = -1;
static int hf_dvbs2_fragment_overlap = -1;
static int hf_dvbs2_fragment_overlap_conflict = -1;
static int hf_dvbs2_fragment_multiple_tails = -1;
static int hf_dvbs2_fragment_too_long_fragment = -1;
static int hf_dvbs2_fragment_error = -1;
static int hf_dvbs2_fragment_count = -1;
static int hf_dvbs2_reassembled_in = -1;
static int hf_dvbs2_reassembled_length = -1;
static int hf_dvbs2_reassembled_data = -1;
static const fragment_items dvbs2_frag_items = {
&ett_dvbs2_fragment,
&ett_dvbs2_fragments,
&hf_dvbs2_fragments,
&hf_dvbs2_fragment,
&hf_dvbs2_fragment_overlap,
&hf_dvbs2_fragment_overlap_conflict,
&hf_dvbs2_fragment_multiple_tails,
&hf_dvbs2_fragment_too_long_fragment,
&hf_dvbs2_fragment_error,
&hf_dvbs2_fragment_count,
&hf_dvbs2_reassembled_in,
&hf_dvbs2_reassembled_length,
&hf_dvbs2_reassembled_data,
"DVB-S2 fragments"
};
static unsigned char _use_low_rolloff_value = 0;
/* Offset in SYNC MARKER */
#define DVB_S2_OFFS_SYNCBYTE 0
/* *** DVB-S2 Modeadaption Header *** */
/* first byte */
#define DVB_S2_MODEADAPT_OFFS_SYNCBYTE 0
#define DVB_S2_MODEADAPT_SYNCBYTE 0xB8
/* second byte */
#define DVB_S2_MODEADAPT_OFFS_ACMBYTE 1
#define DVB_S2_MODEADAPT_MODCODS_MASK 0x1F
#define DVB_S2_MODEADAPT_MODCODS_S2X_MASK 0xDF
static const value_string modeadapt_modcods[] = {
{ 0, "DUMMY PLFRAME"},
{ 1, "QPSK 1/4"},
{ 2, "QPSK 1/3"},
{ 3, "QPSK 2/5"},
{ 4, "QPSK 1/2"},
{ 5, "QPSK 3/5"},
{ 6, "QPSK 2/3"},
{ 7, "QPSK 3/4"},
{ 8, "QPSK 4/5"},
{ 9, "QPSK 5/6"},
{10, "QPSK 8/9"},
{11, "QPSK 9/10"},
{12, "8PSK 3/5"},
{13, "8PSK 2/3"},
{14, "8PSK 3/4"},
{15, "8PSK 5/6"},
{16, "8PSK 8/9"},
{17, "8PSK 9/10"},
{18, "16APSK 2/3"},
{19, "16APSK 3/4"},
{20, "16APSK 4/5"},
{21, "16APSK 5/6"},
{22, "16APSK 8/9"},
{23, "16APSK 9/10"},
{24, "32APSK 3/4"},
{25, "32APSK 4/5"},
{26, "32APSK 5/6"},
{27, "32APSK 8/9"},
{28, "32APSK 9/10"},
{29, "reserved"},
{30, "reserved"},
{31, "reserved"},
{32, "QPSK 1/3 SF48"},
{33, "QPSK 1/2 SF48"},
{34, "QPSK 1/4 SF12"},
{35, "QPSK 1/3 SF12"},
{36, "QPSK 1/2 SF12"},
{37, "QPSK 1/3 SF6"},
{38, "QPSK 1/2 SF6"},
{39, "QPSK 1/3 SF3"},
{40, "QPSK 2/5 SF3"},
{41, "QPSK 1/3 SF2"},
{42, "QPSK 2/5 SF2"},
{43, "QPSK 1/2 SF2"},
{44, "QPSK 1/3 SF1"},
{45, "QPSK 2/5 SF1"},
{46, "QPSK 1/2 SF1"},
{47, "reserved"},
{48, "reserved"},
{49, "reserved"},
{50, "reserved"},
{51, "reserved"},
{52, "reserved"},
{53, "reserved"},
{54, "reserved"},
{55, "reserved"},
{56, "reserved"},
{57, "reserved"},
{58, "reserved"},
{59, "reserved"},
{60, "reserved"},
{61, "reserved"},
{62, "reserved"},
{63, "reserved"},
{64, "reserved"},
{65, "reserved"},
{66, "reserved"},
{67, "reserved"},
{68, "reserved"},
{69, "reserved"},
{70, "reserved"},
{71, "reserved"},
{72, "reserved"},
{73, "reserved"},
{74, "reserved"},
{75, "reserved"},
{76, "reserved"},
{77, "reserved"},
{78, "reserved"},
{79, "reserved"},
{80, "reserved"},
{81, "reserved"},
{82, "reserved"},
{83, "reserved"},
{84, "reserved"},
{85, "reserved"},
{86, "reserved"},
{87, "reserved"},
{88, "reserved"},
{89, "reserved"},
{90, "reserved"},
{91, "reserved"},
{92, "reserved"},
{93, "reserved"},
{94, "reserved"},
{95, "reserved"},
{96, "reserved"},
{97, "reserved"},
{98, "reserved"},
{99, "reserved"},
{100, "reserved"},
{101, "reserved"},
{102, "reserved"},
{103, "reserved"},
{104, "reserved"},
{105, "reserved"},
{106, "reserved"},
{107, "reserved"},
{108, "reserved"},
{109, "reserved"},
{110, "reserved"},
{111, "reserved"},
{112, "reserved"},
{113, "reserved"},
{114, "reserved"},
{115, "reserved"},
{116, "reserved"},
{117, "reserved"},
{118, "reserved"},
{119, "reserved"},
{120, "reserved"},
{121, "reserved"},
{122, "reserved"},
{123, "reserved"},
{124, "reserved"},
{125, "reserved"},
{126, "reserved"},
{127, "reserved"},
{128, "reserved"},
{129, "reserved"},
{130, "reserved"},
{131, "reserved"},
{132, "QPSK 13/45"},
{133, "reserved"},
{134, "QPSK 9/20"},
{135, "reserved"},
{136, "QPSK 11/20"},
{137, "reserved"},
{138, "8PSK 5/9-L"},
{139, "reserved"},
{140, "8PSK 26/45-L"},
{141, "reserved"},
{142, "8PSK 23/36"},
{143, "reserved"},
{144, "8PSK 25/36"},
{145, "reserved"},
{146, "8PSK 13/18"},
{147, "reserved"},
{148, "16APSK 1/2-L"},
{149, "reserved"},
{150, "16APSK 8/15-L"},
{151, "reserved"},
{152, "16APSK 5/9-L"},
{153, "reserved"},
{154, "16APSK 26/45"},
{155, "reserved"},
{156, "16APSK 3/5"},
{157, "reserved"},
{158, "16APSK 3/5-L"},
{159, "reserved"},
{160, "16APSK 28/45"},
{161, "reserved"},
{162, "16APSK 23/36"},
{163, "reserved"},
{164, "16APSK 2/3-L"},
{165, "reserved"},
{166, "16APSK 25/36"},
{167, "reserved"},
{168, "16APSK 13/18"},
{169, "reserved"},
{170, "16APSK 7/9"},
{171, "reserved"},
{172, "16APSK 77/90"},
{173, "reserved"},
{174, "32APSK 2/3-L"},
{175, "reserved"},
{176, "reserved"},
{177, "reserved"},
{178, "32APSK 32/45"},
{179, "reserved"},
{180, "32APSK 11/15"},
{181, "reserved"},
{182, "32APSK 7/9"},
{183, "reserved"},
{184, "64APSK 32/45-L"},
{185, "reserved"},
{186, "64APSK 11/15"},
{187, "reserved"},
{188, "reserved"},
{189, "reserved"},
{190, "64APSK 7/9"},
{191, "reserved"},
{192, "reserved"},
{193, "reserved"},
{194, "64APSK 4/5"},
{195, "reserved"},
{196, "reserved"},
{197, "reserved"},
{198, "64APSK 5/6"},
{199, "reserved"},
{200, "128APSK 3/4"},
{201, "reserved"},
{202, "128APSK 7/9"},
{203, "reserved"},
{204, "256APSK 29/45-L"},
{205, "reserved"},
{206, "256APSK 2/3-L"},
{207, "reserved"},
{208, "256APSK 31/45-L"},
{209, "reserved"},
{210, "256APSK 32/45"},
{211, "reserved"},
{212, "256APSK 11/15-L"},
{213, "reserved"},
{214, "256APSK 3/4"},
{215, "reserved"},
{216, "QPSK 11/45"},
{217, "reserved"},
{218, "QPSK 4/15"},
{219, "reserved"},
{220, "QPSK 14/45"},
{221, "reserved"},
{222, "QPSK 7/15"},
{223, "reserved"},
{224, "QPSK 8/15"},
{225, "reserved"},
{226, "QPSK 32/45"},
{227, "reserved"},
{228, "8PSK 7/15"},
{229, "reserved"},
{230, "8PSK 8/15"},
{231, "reserved"},
{232, "8PSK 26/45"},
{233, "reserved"},
{234, "8PSK 32/45"},
{235, "reserved"},
{236, "16APSK 7/15"},
{237, "reserved"},
{238, "16APSK 8/15"},
{239, "reserved"},
{240, "16APSK 26/45"},
{241, "reserved"},
{242, "16APSK 3/5"},
{243, "reserved"},
{244, "16APSK 32/45"},
{245, "reserved"},
{246, "32APSK 2/3"},
{247, "reserved"},
{248, "32APSK 32/45"},
{249, "reserved"},
{250, "reserved"},
{251, "reserved"},
{252, "reserved"},
{253, "reserved"},
{254, "reserved"},
{255, "reserved"},
{ 0, NULL}
};
static value_string_ext modeadapt_modcods_ext = VALUE_STRING_EXT_INIT(modeadapt_modcods);
#define DVB_S2_MODEADAPT_PILOTS_MASK 0x20
static const true_false_string tfs_modeadapt_pilots = {
"pilots on",
"pilots off"
};
#define DVB_S2_MODEADAPT_FECFRAME_MASK 0x40
static const true_false_string tfs_modeadapt_fecframe = {
"short",
"normal"
};
/* third byte */
#define DVB_S2_MODEADAPT_OFFS_CNI 2
static const value_string modeadapt_esno[] = {
{ 0, "modem unlocked, SNR not available"},
{ 1, "-1.000"},
{ 2, "-0.875"},
{ 3, "-0.750"},
{ 4, "-0.625"},
{ 5, "-0.500"},
{ 6, "-0.375"},
{ 7, "-0.250"},
{ 8, "-0.125"},
{ 9, "0.000"},
{ 10, "0.125"},
{ 11, "0.250"},
{ 12, "0.375"},
{ 13, "0.500"},
{ 14, "0.625"},
{ 15, "0.750"},
{ 16, "0.875"},
{ 17, "1.000"},
{ 18, "1.125"},
{ 19, "1.250"},
{ 20, "1.375"},
{ 21, "1.500"},
{ 22, "1.625"},
{ 23, "1.750"},
{ 24, "1.875"},
{ 25, "2.000"},
{ 26, "2.125"},
{ 27, "2.250"},
{ 28, "2.375"},
{ 29, "2.500"},
{ 30, "2.625"},
{ 31, "2.750"},
{ 32, "2.875"},
{ 33, "3.000"},
{ 34, "3.125"},
{ 35, "3.250"},
{ 36, "3.375"},
{ 37, "3.500"},
{ 38, "3.625"},
{ 39, "3.750"},
{ 40, "3.875"},
{ 41, "4.000"},
{ 42, "4.125"},
{ 43, "4.250"},
{ 44, "4.375"},
{ 45, "4.500"},
{ 46, "4.625"},
{ 47, "4.750"},
{ 48, "4.875"},
{ 49, "5.000"},
{ 50, "5.125"},
{ 51, "5.250"},
{ 52, "5.375"},
{ 53, "5.500"},
{ 54, "5.625"},
{ 55, "5.750"},
{ 56, "5.875"},
{ 57, "6.000"},
{ 58, "6.125"},
{ 59, "6.250"},
{ 60, "6.375"},
{ 61, "6.500"},
{ 62, "6.625"},
{ 63, "6.750"},
{ 64, "6.875"},
{ 65, "7.000"},
{ 66, "7.125"},
{ 67, "7.250"},
{ 68, "7.375"},
{ 69, "7.500"},
{ 70, "7.625"},
{ 71, "7.750"},
{ 72, "7.875"},
{ 73, "8.000"},
{ 74, "8.125"},
{ 75, "8.250"},
{ 76, "8.375"},
{ 77, "8.500"},
{ 78, "8.625"},
{ 79, "8.750"},
{ 80, "8.875"},
{ 81, "9.000"},
{ 82, "9.125"},
{ 83, "9.250"},
{ 84, "9.375"},
{ 85, "9.500"},
{ 86, "9.625"},
{ 87, "9.750"},
{ 88, "9.875"},
{ 89, "10.000"},
{ 90, "10.125"},
{ 91, "10.250"},
{ 92, "10.375"},
{ 93, "10.500"},
{ 94, "10.625"},
{ 95, "10.750"},
{ 96, "10.875"},
{ 97, "11.000"},
{ 98, "11.125"},
{ 99, "11.250"},
{100, "11.375"},
{101, "11.500"},
{102, "11.625"},
{103, "11.750"},
{104, "11.875"},
{105, "12.000"},
{106, "12.125"},
{107, "12.250"},
{108, "12.375"},
{109, "12.500"},
{110, "12.625"},
{111, "12.750"},
{112, "12.875"},
{113, "13.000"},
{114, "13.125"},
{115, "13.250"},
{116, "13.375"},
{117, "13.500"},
{118, "13.625"},
{119, "13.750"},
{120, "13.875"},
{121, "14.000"},
{122, "14.125"},
{123, "14.250"},
{124, "14.375"},
{125, "14.500"},
{126, "14.625"},
{127, "14.750"},
{128, "14.875"},
{129, "15.000"},
{130, "15.125"},
{131, "15.250"},
{132, "15.375"},
{133, "15.500"},
{134, "15.625"},
{135, "15.750"},
{136, "15.875"},
{137, "16.000"},
{138, "16.125"},
{139, "16.250"},
{140, "16.375"},
{141, "16.500"},
{142, "16.625"},
{143, "16.750"},
{144, "16.875"},
{145, "17.000"},
{146, "17.125"},
{147, "17.250"},
{148, "17.375"},
{149, "17.500"},
{150, "17.625"},
{151, "17.750"},
{152, "17.875"},
{153, "18.000"},
{154, "18.125"},
{155, "18.250"},
{156, "18.375"},
{157, "18.500"},
{158, "18.625"},
{159, "18.750"},
{160, "18.875"},
{161, "19.000"},
{162, "19.125"},
{163, "19.250"},
{164, "19.375"},
{165, "19.500"},
{166, "19.625"},
{167, "19.750"},
{168, "19.875"},
{169, "20.000"},
{170, "20.125"},
{171, "20.250"},
{172, "20.375"},
{173, "20.500"},
{174, "20.625"},
{175, "20.750"},
{176, "20.875"},
{177, "21.000"},
{178, "21.125"},
{179, "21.250"},
{180, "21.375"},
{181, "21.500"},
{182, "21.625"},
{183, "21.750"},
{184, "21.875"},
{185, "22.000"},
{186, "22.125"},
{187, "22.250"},
{188, "22.375"},
{189, "22.500"},
{190, "22.625"},
{191, "22.750"},
{192, "22.875"},
{193, "23.000"},
{194, "23.125"},
{195, "23.250"},
{196, "23.375"},
{197, "23.500"},
{198, "23.625"},
{199, "23.750"},
{200, "23.875"},
{201, "24.000"},
{202, "24.125"},
{203, "24.250"},
{204, "24.375"},
{205, "24.500"},
{206, "24.625"},
{207, "24.750"},
{208, "24.875"},
{209, "25.000"},
{210, "25.125"},
{211, "25.250"},
{212, "25.375"},
{213, "25.500"},
{214, "25.625"},
{215, "25.750"},
{216, "25.875"},
{217, "26.000"},
{218, "26.125"},
{219, "26.250"},
{220, "26.375"},
{221, "26.500"},
{222, "26.625"},
{223, "26.750"},
{224, "26.875"},
{225, "27.000"},
{226, "27.125"},
{227, "27.250"},
{228, "27.375"},
{229, "27.500"},
{230, "27.625"},
{231, "27.750"},
{232, "27.875"},
{233, "28.000"},
{234, "28.125"},
{235, "28.250"},
{236, "28.375"},
{237, "28.500"},
{238, "28.625"},
{239, "28.750"},
{240, "28.875"},
{241, "29.000"},
{242, "29.125"},
{243, "29.250"},
{244, "29.375"},
{245, "29.500"},
{246, "29.625"},
{247, "29.750"},
{248, "29.875"},
{249, "30.000"},
{250, "30.125"},
{251, "30.250"},
{252, "30.375"},
{253, "30.500"},
{254, "30.625"},
{255, ">30.750"},
{ 0, NULL}
};
static value_string_ext modeadapt_esno_ext = VALUE_STRING_EXT_INIT(modeadapt_esno);
/* fourth byte */
#define DVB_S2_MODEADAPT_OFFS_FNO 3
/* *** DVB-S2 Base-Band Frame *** */
#define DVB_S2_BB_HEADER_LEN 10
#define DVB_S2_BB_OFFS_MATYPE1 0
#define DVB_S2_BB_TSGS_MASK 0xC0
#define DVB_S2_BB_TSGS_GENERIC_PACKETIZED 0x00
#define DVB_S2_BB_TSGS_GENERIC_CONTINUOUS 0x40
#define DVB_S2_BB_TSGS_TRANSPORT_STREAM 0xC0
#define DVB_S2_BB_TSGS_RESERVED 0x80
static const value_string bb_tsgs[] = {
{0, "Generic Packetized (not GSE)"},
{1, "Generic Continuous (GSE)"},
{2, "reserved"},
{3, "Transport (TS)"},
{0, NULL}
};
#define DVB_S2_BB_MIS_POS 5
#define DVB_S2_BB_MIS_MASK 0x20
static const true_false_string tfs_bb_mis = {
"single (SIS)",
"multiple (MIS)"
};
#define DVB_S2_BB_ACM_MASK 0x10
static const true_false_string tfs_bb_acm = {
"constant (CCM)",
"adaptive (ACM)"
};
#define DVB_S2_BB_ISSYI_POS 3
#define DVB_S2_BB_ISSYI_MASK 0x08
static const true_false_string tfs_bb_issyi = {
"active",
"not-active"
};
#define DVB_S2_BB_NPD_POS 2
#define DVB_S2_BB_NPD_MASK 0x04
static const true_false_string tfs_bb_npd = {
"active",
"not-active"
};
#define DVB_S2_BB_RO_MASK 0x03
static const value_string bb_high_ro[] = {
{0, "0,35"},
{1, "0,25"},
{2, "0,20"},
{3, "Low rolloff flag"},
{0, NULL}
};
static const value_string bb_low_ro[] = {
{0, "0,15"},
{1, "0,10"},
{2, "0,05"},
{3, "Low rolloff flag"},
{0, NULL}
};
#define DVB_S2_BB_OFFS_MATYPE2 1
#define DVB_S2_BB_OFFS_UPL 2
#define DVB_S2_BB_OFFS_DFL 4
#define DVB_S2_BB_OFFS_SYNC 6
#define DVB_S2_BB_OFFS_SYNCD 7
#define DVB_S2_BB_OFFS_CRC 9
#define DVB_S2_BB_EIP_CRC32_LEN 4
#define DVB_S2_BB_SYNC_EIP_CRC32 1
/* *** DVB-S2 GSE Frame *** */
#define DVB_S2_GSE_MINSIZE 2
#define DVB_S2_GSE_OFFS_HDR 0
#define DVB_S2_GSE_HDR_START_MASK 0x8000
#define DVB_S2_GSE_HDR_START_POS 15
#define DVB_S2_GSE_HDR_STOP_MASK 0x4000
#define DVB_S2_GSE_HDR_STOP_POS 14
#define DVB_S2_GSE_HDR_LABELTYPE_MASK 0x3000
#define DVB_S2_GSE_HDR_LABELTYPE_POS1 13
#define DVB_S2_GSE_HDR_LABELTYPE_POS2 12
static const value_string gse_labeltype[] = {
{0, "6 byte"},
{1, "3 byte"},
{2, "0 byte (Broadcast)"},
{3, "re-use last label"},
{0, NULL}
};
#define DVB_S2_GSE_HDR_LENGTH_MASK 0x0FFF
#define DVB_RCS2_NCR 0x0081
#define DVB_RCS2_SIGNAL_TABLE 0x0082
static const value_string gse_proto_next_header_str[] = {
/* Mandatory Extension Headers (or link-dependent type fields) for ULE (Range 0-255 decimal) */
{0x0000, "Test SNDU" },
{0x0001, "Bridged Frame" },
{0x0002, "TS-Concat" },
{0x0003, "PDU-Concat" },
{DVB_RCS2_NCR, "NCR" },
{DVB_RCS2_SIGNAL_TABLE, "Signaling Table" },
{131, "LL_RCS_DCP" },
{132, "LL_RCS_1" },
{133, "LL_RCS_TRANSEC_SYS" },
{134, "LL_RCS_TRANSEC_PAY" },
{135, "DVB-GSE_LLC" },
/* Unassigned, private, unassigned ranges */
{200, "LL_RCS_FEC_EDT" },
/* Unassigned */
/* Optional Extension Headers for ULE (Range 256-511 decimal) */
{256, "Extension-Padding" },
{257, "Timestamp" },
/* Unassigned */
{450, "LL_RCS_FEC_ADT" },
{451, "LL_CRC32" },
/* Unassigned */
{0, NULL}
};
#define DVB_S2_GSE_CRC32_LEN 4
/* *** helper functions *** */
static guint8 compute_crc8(tvbuff_t *p, guint8 len, guint8 offset)
{
int i;
guint8 crc = 0, tmp;
for (i = 0; i < len; i++) {
tmp = tvb_get_guint8(p, offset++);
crc = crc8_table[crc ^ tmp];
}
return crc;
}
/* *** Code to actually dissect the packets *** */
static int dissect_dvb_s2_gse(tvbuff_t *tvb, int cur_off, proto_tree *tree, packet_info *pinfo, int bytes_available)
{
int new_off = 0;
int frag_len;
guint16 gse_hdr, data_len, padding_len, gse_proto = 0;
proto_item *ti;
proto_item *ttf;
proto_tree *dvb_s2_gse_tree, *dvb_s2_gse_ncr_tree;
tvbuff_t *next_tvb, *data_tvb;
gboolean dissected = FALSE;
gboolean update_col_info = TRUE;
static int * const gse_header_bitfields[] = {
&hf_dvb_s2_gse_hdr_start,
&hf_dvb_s2_gse_hdr_stop,
&hf_dvb_s2_gse_hdr_labeltype,
&hf_dvb_s2_gse_hdr_length,
NULL
};
col_append_str(pinfo->cinfo, COL_INFO, " GSE");
/* get the GSE header */
gse_hdr = tvb_get_ntohs(tvb, cur_off + DVB_S2_GSE_OFFS_HDR);
/* check if this is just padding, which takes up the rest of the frame */
if (BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_START_POS) &&
BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_STOP_POS) &&
BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_LABELTYPE_POS1) && BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_LABELTYPE_POS2)) {
padding_len = bytes_available;
proto_tree_add_uint_format(tree, hf_dvb_s2_gse_padding, tvb, cur_off + new_off, padding_len, padding_len,
"DVB-S2 GSE Padding, Length: %d", padding_len);
col_append_str(pinfo->cinfo, COL_INFO, " pad");
new_off += padding_len;
return new_off;
} else {
/* Not padding, parse as a GSE Header */
new_off += 2;
frag_len = (gse_hdr & DVB_S2_GSE_HDR_LENGTH_MASK)+2;
ti = proto_tree_add_item(tree, proto_dvb_s2_gse, tvb, cur_off, frag_len, ENC_NA);
dvb_s2_gse_tree = proto_item_add_subtree(ti, ett_dvb_s2_gse);
proto_tree_add_bitmask_with_flags(dvb_s2_gse_tree, tvb, cur_off + DVB_S2_GSE_OFFS_HDR, hf_dvb_s2_gse_hdr,
ett_dvb_s2_gse_hdr, gse_header_bitfields, ENC_BIG_ENDIAN, BMT_NO_TFS);
/* Get the fragment ID for reassembly */
guint8 fragid = tvb_get_guint8(tvb, cur_off + new_off);
if (BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_START_POS) || BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_STOP_POS)) {
/* Not a start or end packet, add only the fragid */
proto_tree_add_item(dvb_s2_gse_tree, hf_dvb_s2_gse_fragid, tvb, cur_off + new_off, 1, ENC_BIG_ENDIAN);
new_off += 1;
}
if (BIT_IS_SET(gse_hdr, DVB_S2_GSE_HDR_START_POS) && BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_STOP_POS)) {
/* Start packet, add the fragment size */
proto_tree_add_item(dvb_s2_gse_tree, hf_dvb_s2_gse_totlength, tvb, cur_off + new_off, 2, ENC_BIG_ENDIAN);
col_append_str(pinfo->cinfo, COL_INFO, "(frag) ");
new_off += 2;
}
if (BIT_IS_SET(gse_hdr, DVB_S2_GSE_HDR_START_POS)) {
/* Start packet, decode the header */
gse_proto = tvb_get_ntohs(tvb, cur_off + new_off);
/* Protocol Type */
if (gse_proto <= 1535) {
/* Type 1 (Next-Header Type field) */
proto_tree_add_item(dvb_s2_gse_tree, hf_dvb_s2_gse_proto_next_header, tvb, cur_off + new_off, 2, ENC_BIG_ENDIAN);
}
else {
/* Type 2 (EtherType compatible Type Fields) */
proto_tree_add_item(dvb_s2_gse_tree, hf_dvb_s2_gse_proto_ethertype, tvb, cur_off + new_off, 2, ENC_BIG_ENDIAN);
}
new_off += 2;
if (BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_LABELTYPE_POS1) && BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_LABELTYPE_POS2)) {
/* 6 byte label */
if (BIT_IS_SET(gse_hdr, DVB_S2_GSE_HDR_STOP_POS))
col_append_str(pinfo->cinfo, COL_INFO, "6 ");
proto_tree_add_item(dvb_s2_gse_tree, hf_dvb_s2_gse_label6, tvb, cur_off + new_off, 6, ENC_NA);
new_off += 6;
} else if (BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_LABELTYPE_POS1) &&
BIT_IS_SET(gse_hdr, DVB_S2_GSE_HDR_LABELTYPE_POS2)) {
/* 3 byte label */
if (BIT_IS_SET(gse_hdr, DVB_S2_GSE_HDR_STOP_POS))
col_append_str(pinfo->cinfo, COL_INFO, "3 ");
proto_tree_add_item(dvb_s2_gse_tree, hf_dvb_s2_gse_label3, tvb, cur_off + new_off, 3, ENC_BIG_ENDIAN);
new_off += 3;
} else {
/* 0 byte label */
if (BIT_IS_SET(gse_hdr, DVB_S2_GSE_HDR_STOP_POS))
col_append_str(pinfo->cinfo, COL_INFO, "0 ");
}
if (gse_proto < 0x0600 && gse_proto >= 0x100) {
/* Only display optional extension headers */
/* TODO: needs to be tested */
/* TODO: implementation needs to be checked (len of ext-header??) */
proto_tree_add_item(dvb_s2_gse_tree, hf_dvb_s2_gse_exthdr, tvb, cur_off + new_off, 1, ENC_BIG_ENDIAN);
new_off += 1;
}
}
else
{
/* correct cinfo */
col_append_str(pinfo->cinfo, COL_INFO, "(frag) ");
}
next_tvb = tvb_new_subset_remaining(tvb, cur_off + new_off);
if (BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_START_POS) && BIT_IS_SET(gse_hdr, DVB_S2_GSE_HDR_STOP_POS)) {
data_len = (gse_hdr & DVB_S2_GSE_HDR_LENGTH_MASK) - (new_off - DVB_S2_GSE_MINSIZE) - DVB_S2_GSE_CRC32_LEN;
} else {
data_len = (gse_hdr & DVB_S2_GSE_HDR_LENGTH_MASK) - (new_off - DVB_S2_GSE_MINSIZE);
}
data_tvb = NULL;
if (BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_START_POS) || BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_STOP_POS)) {
fragment_head *dvbs2_frag_head = NULL;
int offset = cur_off + new_off;
if (BIT_IS_SET(gse_hdr, DVB_S2_GSE_HDR_START_POS)) {
offset -= 2; /* re-include GSE type in reassembled data */
data_len += 2;
}
dvbs2_frag_head = fragment_add_seq_next(&dvbs2_reassembly_table, tvb, offset,
pinfo, fragid, NULL, data_len, BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_STOP_POS));
if (BIT_IS_SET(gse_hdr, DVB_S2_GSE_HDR_STOP_POS))
dvbs2_frag_head = fragment_end_seq_next(&dvbs2_reassembly_table, pinfo, fragid, NULL);
data_tvb = process_reassembled_data(tvb, cur_off + new_off, pinfo, "Reassembled DVB-S2",
dvbs2_frag_head, &dvbs2_frag_items, &update_col_info, tree);
}
if (data_tvb != NULL) {
/* We have a reassembled packet. Extract the gse_proto from it. */
gse_proto = tvb_get_ntohs(data_tvb, 0);
/* And then remove it from the reassembled data */
data_tvb = tvb_new_subset_remaining(data_tvb, 2);
} else {
data_tvb = tvb_new_subset_length(tvb, cur_off + new_off, data_len);
}
switch (gse_proto) {
case ETHERTYPE_IP:
if (dvb_s2_full_dissection)
{
new_off += call_dissector(ip_handle, next_tvb, pinfo, tree);
dissected = TRUE;
}
break;
case ETHERTYPE_IPv6:
if (dvb_s2_full_dissection)
{
new_off += call_dissector(ipv6_handle, next_tvb, pinfo, tree);
dissected = TRUE;
}
break;
case ETHERTYPE_VLAN:
if (dvb_s2_full_dissection)
{
new_off += call_dissector(eth_withoutfcs_handle, next_tvb, pinfo, tree);
dissected = TRUE;
}
break;
case DVB_RCS2_SIGNAL_TABLE:
call_dissector(dvb_s2_table_handle, data_tvb, pinfo, tree);
new_off += data_len;
dissected = TRUE;
break;
case DVB_RCS2_NCR:
ttf = proto_tree_add_item(dvb_s2_gse_tree, hf_dvb_s2_gse_ncr, tvb, cur_off + new_off, data_len, ENC_NA);
dvb_s2_gse_ncr_tree = proto_item_add_subtree(ttf, ett_dvb_s2_gse_ncr);
proto_tree_add_item(dvb_s2_gse_ncr_tree, hf_dvb_s2_gse_data, tvb, cur_off + new_off, data_len, ENC_NA);
new_off += data_len;
dissected = TRUE;
break;
default:
/* Not handled! TODO: expert info? */
break;
}
if (!dissected) {
proto_tree_add_item(dvb_s2_gse_tree, hf_dvb_s2_gse_data, tvb, cur_off + new_off, data_len, ENC_NA);
new_off += data_len;
}
/* add crc32 if last fragment */
if (BIT_IS_CLEAR(gse_hdr, DVB_S2_GSE_HDR_START_POS) && BIT_IS_SET(gse_hdr, DVB_S2_GSE_HDR_STOP_POS)) {
proto_tree_add_item(dvb_s2_gse_tree, hf_dvb_s2_gse_crc32, tvb, cur_off + new_off, DVB_S2_GSE_CRC32_LEN, ENC_BIG_ENDIAN);
new_off += DVB_S2_GSE_CRC32_LEN;
}
}
return new_off;
}
static gboolean test_dvb_s2_crc(tvbuff_t *tvb, guint offset) {
guint8 input8;
/* only check BB Header and return */
if (tvb_captured_length(tvb) < (offset + DVB_S2_BB_HEADER_LEN))
return FALSE;
input8 = tvb_get_guint8(tvb, offset + DVB_S2_BB_OFFS_CRC);
if (compute_crc8(tvb, DVB_S2_BB_HEADER_LEN - 1, offset) != input8)
return FALSE;
else
return TRUE;
}
static int dissect_dvb_s2_bb(tvbuff_t *tvb, int cur_off, proto_tree *tree, packet_info *pinfo)
{
proto_item *ti;
proto_tree *dvb_s2_bb_tree;
guint8 input8, matype1;
guint8 sync_flag = 0;
guint16 input16, bb_data_len = 0, user_packet_length;
int sub_dissected = 0, flag_is_ms = 0, new_off = 0;
static int * const bb_header_bitfields[] = {
&hf_dvb_s2_bb_matype1_gs,
&hf_dvb_s2_bb_matype1_mis,
&hf_dvb_s2_bb_matype1_acm,
&hf_dvb_s2_bb_matype1_issyi,
&hf_dvb_s2_bb_matype1_npd,
&hf_dvb_s2_bb_matype1_low_ro,
NULL
};
col_append_str(pinfo->cinfo, COL_PROTOCOL, "BB ");
col_append_str(pinfo->cinfo, COL_INFO, "Baseband ");
/* create display subtree for the protocol */
ti = proto_tree_add_item(tree, proto_dvb_s2_bb, tvb, cur_off, DVB_S2_BB_HEADER_LEN, ENC_NA);
dvb_s2_bb_tree = proto_item_add_subtree(ti, ett_dvb_s2_bb);
matype1 = tvb_get_guint8(tvb, cur_off + DVB_S2_BB_OFFS_MATYPE1);
new_off += 1;
if (BIT_IS_CLEAR(matype1, DVB_S2_BB_MIS_POS))
flag_is_ms = 1;
proto_tree_add_bitmask_with_flags(dvb_s2_bb_tree, tvb, cur_off + DVB_S2_BB_OFFS_MATYPE1, hf_dvb_s2_bb_matype1,
ett_dvb_s2_bb_matype1, bb_header_bitfields, ENC_BIG_ENDIAN, BMT_NO_FLAGS);
input8 = tvb_get_guint8(tvb, cur_off + DVB_S2_BB_OFFS_MATYPE1);
if ((pinfo->fd->num == 1) && (_use_low_rolloff_value != 0)) {
_use_low_rolloff_value = 0;
}
if (((input8 & 0x03) == 3) && !_use_low_rolloff_value) {
_use_low_rolloff_value = 1;
}
if (_use_low_rolloff_value) {
proto_tree_add_item(dvb_s2_bb_tree, hf_dvb_s2_bb_matype1_low_ro, tvb,
cur_off + DVB_S2_BB_OFFS_MATYPE1, 1, ENC_BIG_ENDIAN);
} else {
proto_tree_add_item(dvb_s2_bb_tree, hf_dvb_s2_bb_matype1_high_ro, tvb,
cur_off + DVB_S2_BB_OFFS_MATYPE1, 1, ENC_BIG_ENDIAN);
}
input8 = tvb_get_guint8(tvb, cur_off + DVB_S2_BB_OFFS_MATYPE2);
new_off += 1;
if (flag_is_ms) {
proto_tree_add_uint_format_value(dvb_s2_bb_tree, hf_dvb_s2_bb_matype2, tvb,
cur_off + DVB_S2_BB_OFFS_MATYPE2, 1, input8, "Input Stream Identifier (ISI): %d",
input8);
} else {
proto_tree_add_uint_format_value(dvb_s2_bb_tree, hf_dvb_s2_bb_matype2, tvb,
cur_off + DVB_S2_BB_OFFS_MATYPE2, 1, input8, "reserved");
}
user_packet_length = input16 = tvb_get_ntohs(tvb, cur_off + DVB_S2_BB_OFFS_UPL);
new_off += 2;
proto_tree_add_uint_format(dvb_s2_bb_tree, hf_dvb_s2_bb_upl, tvb,
cur_off + DVB_S2_BB_OFFS_UPL, 2, input16, "User Packet Length: %d bits (%d bytes)",
(guint16) input16, (guint16) input16 / 8);
bb_data_len = input16 = tvb_get_ntohs(tvb, cur_off + DVB_S2_BB_OFFS_DFL);
bb_data_len /= 8;
new_off += 2;
proto_tree_add_uint_format_value(dvb_s2_bb_tree, hf_dvb_s2_bb_dfl, tvb,
cur_off + DVB_S2_BB_OFFS_DFL, 2, input16, "%d bits (%d bytes)", input16, input16 / 8);
new_off += 1;
sync_flag = tvb_get_guint8(tvb, cur_off + DVB_S2_BB_OFFS_SYNC);
proto_tree_add_item(dvb_s2_bb_tree, hf_dvb_s2_bb_sync, tvb, cur_off + DVB_S2_BB_OFFS_SYNC, 1, ENC_BIG_ENDIAN);
new_off += 2;
proto_tree_add_item(dvb_s2_bb_tree, hf_dvb_s2_bb_syncd, tvb, cur_off + DVB_S2_BB_OFFS_SYNCD, 2, ENC_BIG_ENDIAN);
new_off += 1;
proto_tree_add_checksum(dvb_s2_bb_tree, tvb, cur_off + DVB_S2_BB_OFFS_CRC, hf_dvb_s2_bb_crc, hf_dvb_s2_bb_crc_status, &ei_dvb_s2_bb_crc, pinfo,
compute_crc8(tvb, DVB_S2_BB_HEADER_LEN - 1, cur_off), ENC_NA, PROTO_CHECKSUM_VERIFY);
switch (matype1 & DVB_S2_BB_TSGS_MASK) {
case DVB_S2_BB_TSGS_GENERIC_CONTINUOUS:
/* Check GSE constraints on the BB header per 9.2.1 of ETSI TS 102 771 */
if (BIT_IS_SET(matype1, DVB_S2_BB_ISSYI_POS)) {
expert_add_info(pinfo, ti, &ei_dvb_s2_bb_issy_invalid);
}
if (BIT_IS_SET(matype1, DVB_S2_BB_NPD_POS)) {
expert_add_info(pinfo, ti, &ei_dvb_s2_bb_npd_invalid);
}
if (user_packet_length != 0x0000) {
expert_add_info_format(pinfo, ti, &ei_dvb_s2_bb_upl_invalid,
"UPL is 0x%04x. It must be 0x0000 for GSE packets.", user_packet_length);
}
if (dvb_s2_df_dissection) {
while (bb_data_len) {
if (sync_flag == DVB_S2_BB_SYNC_EIP_CRC32 && bb_data_len == DVB_S2_BB_EIP_CRC32_LEN) {
proto_tree_add_item(dvb_s2_bb_tree, hf_dvb_s2_bb_eip_crc32, tvb, cur_off + new_off, bb_data_len, ENC_NA);
bb_data_len = 0;
new_off += DVB_S2_BB_EIP_CRC32_LEN;
} else {
/* start DVB-GSE dissector */
sub_dissected = dissect_dvb_s2_gse(tvb, cur_off + new_off, tree, pinfo, bb_data_len);
new_off += sub_dissected;
if ((sub_dissected <= bb_data_len) && (sub_dissected >= DVB_S2_GSE_MINSIZE)) {
bb_data_len -= sub_dissected;
if (bb_data_len < DVB_S2_GSE_MINSIZE)
bb_data_len = 0;
} else {
bb_data_len = 0;
}
}
}
} else {
proto_tree_add_item(dvb_s2_bb_tree, hf_dvb_s2_bb_df, tvb, cur_off + new_off, bb_data_len, ENC_NA);
new_off += bb_data_len;
}
break;
case DVB_S2_BB_TSGS_GENERIC_PACKETIZED:
proto_tree_add_item(tree, hf_dvb_s2_bb_packetized, tvb, cur_off + new_off, bb_data_len, ENC_NA);
new_off += bb_data_len;
break;
case DVB_S2_BB_TSGS_TRANSPORT_STREAM:
proto_tree_add_item(tree, hf_dvb_s2_bb_transport, tvb, cur_off + new_off, bb_data_len, ENC_NA);
new_off += bb_data_len;
break;
default:
proto_tree_add_item(tree, hf_dvb_s2_bb_reserved, tvb, cur_off + new_off,bb_data_len, ENC_NA);
new_off += bb_data_len;
expert_add_info(pinfo, ti, &ei_dvb_s2_bb_reserved);
break;
}
return new_off;
}
static int dissect_dvb_s2_modeadapt(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
{
int cur_off = 0, modeadapt_len, modeadapt_type, matched_headers = 0;
proto_item *ti, *tf;
proto_tree *dvb_s2_modeadapt_tree;
proto_tree *dvb_s2_modeadapt_acm_tree;
unsigned int modcod, mc;
static int * const modeadapt_acm_bitfields[] = {
&hf_dvb_s2_modeadapt_acm_fecframe,
&hf_dvb_s2_modeadapt_acm_pilot,
&hf_dvb_s2_modeadapt_acm_modcod,
NULL
};
/* Check that there's enough data */
if (tvb_captured_length(tvb) < DVB_S2_MODEADAPT_MINSIZE)
return 0;
/* There are four different mode adaptation formats, with different
length headers. Two of them have a sync byte at the beginning, but
the other two do not. In every case, the mode adaptation header is
followed by the baseband header, which is protected by a CRC-8.
The CRC-8 is weak protection, so it can match by accident, leading
to an ambiguity in identifying which format is in use. We will
check for ambiguity and report it. */
/* Try L.1 format: no header. */
if (test_dvb_s2_crc(tvb, DVB_S2_MODEADAPT_L1SIZE)) {
matched_headers++;
modeadapt_type = DVB_S2_MODEADAPT_TYPE_L1;
modeadapt_len = DVB_S2_MODEADAPT_L1SIZE;
}
/* Try L.2 format: header includes sync byte */
if ((tvb_get_guint8(tvb, DVB_S2_MODEADAPT_OFFS_SYNCBYTE) == DVB_S2_MODEADAPT_SYNCBYTE) &&
test_dvb_s2_crc(tvb, DVB_S2_MODEADAPT_L2SIZE)) {
matched_headers++;
modeadapt_type = DVB_S2_MODEADAPT_TYPE_L2;
modeadapt_len = DVB_S2_MODEADAPT_L2SIZE;
}
/* Try L.3 format: header includes sync byte */
if ((tvb_get_guint8(tvb, DVB_S2_MODEADAPT_OFFS_SYNCBYTE) == DVB_S2_MODEADAPT_SYNCBYTE) &&
test_dvb_s2_crc(tvb, DVB_S2_MODEADAPT_L3SIZE)) {
matched_headers++;
modeadapt_type = DVB_S2_MODEADAPT_TYPE_L3;
modeadapt_len = DVB_S2_MODEADAPT_L3SIZE;
}
/* Try L.4 format: header does not include sync byte */
if (test_dvb_s2_crc(tvb, DVB_S2_MODEADAPT_L4SIZE)) {
matched_headers++;
modeadapt_type = DVB_S2_MODEADAPT_TYPE_L4;
modeadapt_len = DVB_S2_MODEADAPT_L4SIZE;
}
if (matched_headers == 0) {
/* This does not look like a DVB-S2-BB frame at all. We are a
heuristic dissector, so we should just punt and let another
dissector have a try at this one. */
return 0;
}
col_set_str(pinfo->cinfo, COL_PROTOCOL, "DVB-S2 ");
col_set_str(pinfo->cinfo, COL_INFO, "DVB-S2 ");
/* If there's a mode adaptation header, create display subtree for it */
if (modeadapt_len > 0) {
/* ti = proto_tree_add_item(tree, proto_dvb_s2_modeadapt, tvb, 0, modeadapt_len, ENC_NA); */
ti = proto_tree_add_protocol_format(tree, proto_dvb_s2_modeadapt, tvb, 0, modeadapt_len,
"DVB-S2 Mode Adaptation Header L.%d", modeadapt_type);
dvb_s2_modeadapt_tree = proto_item_add_subtree(ti, ett_dvb_s2_modeadapt);
if (matched_headers > 1) {
expert_add_info_format(pinfo, ti, &ei_dvb_s2_bb_header_ambiguous,
"Mode adaptation header format is ambiguous. Assuming L.%d", modeadapt_type);
}
/* SYNC byte if used in this header format; value has already been checked */
if (modeadapt_type == DVB_S2_MODEADAPT_TYPE_L2 ||
modeadapt_type == DVB_S2_MODEADAPT_TYPE_L3) {
proto_tree_add_item(dvb_s2_modeadapt_tree, hf_dvb_s2_modeadapt_sync, tvb, cur_off, 1, ENC_BIG_ENDIAN);
cur_off++;
}
/* ACM byte and subfields if used in this header format */
if (modeadapt_type == DVB_S2_MODEADAPT_TYPE_L2 ||
modeadapt_type == DVB_S2_MODEADAPT_TYPE_L3 ||
modeadapt_type == DVB_S2_MODEADAPT_TYPE_L4) {
mc = tvb_get_guint8(tvb, 1);
//mc = tvb_get_letohs(tvb, 0);
if (mc & 0x80) {
modcod = 0x80;
modcod |= ((mc & 0x1F) << 2);
modcod |= ((mc & 0x40) >> 5);
tf = proto_tree_add_item(dvb_s2_modeadapt_tree, hf_dvb_s2_modeadapt_acm, tvb,
DVB_S2_MODEADAPT_OFFS_ACMBYTE, 1, ENC_BIG_ENDIAN);
dvb_s2_modeadapt_acm_tree = proto_item_add_subtree(tf, ett_dvb_s2_modeadapt_acm);
proto_tree_add_item(dvb_s2_modeadapt_acm_tree, hf_dvb_s2_modeadapt_acm_pilot, tvb,
DVB_S2_MODEADAPT_OFFS_ACMBYTE, 1, ENC_BIG_ENDIAN);
proto_tree_add_uint_format_value(dvb_s2_modeadapt_acm_tree, hf_dvb_s2_modeadapt_acm_modcod_s2x, tvb,
DVB_S2_MODEADAPT_OFFS_ACMBYTE, 1, mc, "DVBS2X %s(%d)", modeadapt_modcods[modcod].strptr, modcod);
} else {
proto_tree_add_bitmask_with_flags(dvb_s2_modeadapt_tree, tvb, DVB_S2_MODEADAPT_OFFS_ACMBYTE, hf_dvb_s2_modeadapt_acm,
ett_dvb_s2_modeadapt_acm, modeadapt_acm_bitfields, ENC_BIG_ENDIAN, BMT_NO_FLAGS);
}
cur_off++;
}
/* CNI and Frame No if used in this header format */
if (modeadapt_type == DVB_S2_MODEADAPT_TYPE_L3 ||
modeadapt_type == DVB_S2_MODEADAPT_TYPE_L4) {
proto_tree_add_item(dvb_s2_modeadapt_tree, hf_dvb_s2_modeadapt_cni, tvb, cur_off, 1, ENC_BIG_ENDIAN);
cur_off++;
proto_tree_add_item(dvb_s2_modeadapt_tree, hf_dvb_s2_modeadapt_frameno, tvb, cur_off, 1, ENC_BIG_ENDIAN);
cur_off++;
}
}
/* start DVB-BB dissector */
cur_off = dissect_dvb_s2_bb(tvb, cur_off, tree, pinfo);
return cur_off;
}
/* Register the protocol with Wireshark */
void proto_register_dvb_s2_modeadapt(void)
{
module_t *dvb_s2_modeadapt_module;
static hf_register_info hf_modeadapt[] = {
{&hf_dvb_s2_modeadapt_sync, {
"Sync Byte", "dvb-s2_modeadapt.sync",
FT_UINT8, BASE_HEX, NULL, 0x0,
"Das Sync Byte", HFILL}
},
{&hf_dvb_s2_modeadapt_acm, {
"ACM command", "dvb-s2_modeadapt.acmcmd",
FT_UINT8, BASE_HEX, NULL, 0x0,
NULL, HFILL}
},
{&hf_dvb_s2_modeadapt_acm_fecframe, {
"FEC frame size", "dvb-s2_modeadapt.acmcmd.fecframe",
FT_BOOLEAN, 8, TFS(&tfs_modeadapt_fecframe), DVB_S2_MODEADAPT_FECFRAME_MASK,
"FEC", HFILL}
},
{&hf_dvb_s2_modeadapt_acm_pilot, {
"Pilots configuration", "dvb-s2_modeadapt.acmcmd.pilots",
FT_BOOLEAN, 8, TFS(&tfs_modeadapt_pilots), DVB_S2_MODEADAPT_PILOTS_MASK,
"Pilots", HFILL}
},
{&hf_dvb_s2_modeadapt_acm_modcod, {
"Modcod indicator", "dvb-s2_modeadapt.acmcmd.modcod",
FT_UINT8, BASE_DEC|BASE_EXT_STRING, &modeadapt_modcods_ext, DVB_S2_MODEADAPT_MODCODS_MASK,
"Modcod", HFILL}
},
{&hf_dvb_s2_modeadapt_acm_modcod_s2x, {
"Modcod indicator", "dvb-s2_modeadapt.acmcmd.modcod",
FT_UINT8, BASE_DEC|BASE_EXT_STRING, &modeadapt_modcods_ext, DVB_S2_MODEADAPT_MODCODS_S2X_MASK,
"Modcod S2X", HFILL}
},
{&hf_dvb_s2_modeadapt_cni, {
"Carrier to Noise [dB]", "dvb-s2_modeadapt.cni",
FT_UINT8, BASE_DEC|BASE_EXT_STRING, &modeadapt_esno_ext, 0x0,
"CNI", HFILL}
},
{&hf_dvb_s2_modeadapt_frameno, {
"Frame number", "dvb-s2_modeadapt.frameno",
FT_UINT8, BASE_DEC, NULL, 0x0,
"fno", HFILL}
}
};
/* Setup protocol subtree array */
static gint *ett_modeadapt[] = {
&ett_dvb_s2_modeadapt,
&ett_dvb_s2_modeadapt_acm
};
static hf_register_info hf_bb[] = {
{&hf_dvb_s2_bb_matype1, {
"MATYPE1", "dvb-s2_bb.matype1",
FT_UINT8, BASE_HEX, NULL, 0x0,
"MATYPE1 Header Field", HFILL}
},
{&hf_dvb_s2_bb_matype1_gs, {
"TS/GS Stream Input", "dvb-s2_bb.matype1.tsgs",
FT_UINT8, BASE_DEC, VALS(bb_tsgs), DVB_S2_BB_TSGS_MASK,
"Transport Stream Input or Generic Stream Input", HFILL}
},
{&hf_dvb_s2_bb_matype1_mis, {
"Input Stream", "dvb-s2_bb.matype1.mis",
FT_BOOLEAN, 8, TFS(&tfs_bb_mis), DVB_S2_BB_MIS_MASK,
"Single Input Stream or Multiple Input Stream", HFILL}
},
{&hf_dvb_s2_bb_matype1_acm, {
"Coding and Modulation", "dvb-s2_bb.matype1.acm",
FT_BOOLEAN, 8, TFS(&tfs_bb_acm), DVB_S2_BB_ACM_MASK,
"Constant Coding and Modulation or Adaptive Coding and Modulation", HFILL}
},
{&hf_dvb_s2_bb_matype1_issyi, {
"ISSYI", "dvb-s2_bb.matype1.issyi",
FT_BOOLEAN, 8, TFS(&tfs_bb_issyi), DVB_S2_BB_ISSYI_MASK,
"Input Stream Synchronization Indicator", HFILL}
},
{&hf_dvb_s2_bb_matype1_npd, {
"NPD", "dvb-s2_bb.matype1.npd",
FT_BOOLEAN, 8, TFS(&tfs_bb_npd), DVB_S2_BB_NPD_MASK,
"Null-packet deletion enabled", HFILL}
},
{&hf_dvb_s2_bb_matype1_high_ro, {
"RO", "dvb-s2_bb.matype1.ro",
FT_UINT8, BASE_DEC, VALS(bb_high_ro), DVB_S2_BB_RO_MASK,
"Transmission Roll-off factor", HFILL}
},
{&hf_dvb_s2_bb_matype1_low_ro, {
"RO", "dvb-s2_bb.matype1.ro",
FT_UINT8, BASE_DEC, VALS(bb_low_ro), DVB_S2_BB_RO_MASK,
"Transmission Roll-off factor", HFILL}
},
{&hf_dvb_s2_bb_matype2, {
"MATYPE2", "dvb-s2_bb.matype2",
FT_UINT8, BASE_HEX, NULL, 0x0,
"MATYPE2 Header Field", HFILL}
},
{&hf_dvb_s2_bb_upl, {
"UPL", "dvb-s2_bb.upl",
FT_UINT16, BASE_HEX, NULL, 0x0,
"User Packet Length", HFILL}
},
{&hf_dvb_s2_bb_dfl, {
"DFL", "dvb-s2_bb.dfl",
FT_UINT16, BASE_HEX, NULL, 0x0,
"Data Field Length", HFILL}
},
{&hf_dvb_s2_bb_sync, {
"SYNC", "dvb-s2_bb.sync",
FT_UINT8, BASE_HEX, NULL, 0x0,
"Copy of the User Packet Sync-byte", HFILL}
},
{&hf_dvb_s2_bb_syncd, {
"SYNCD", "dvb-s2_bb.syncd",
FT_UINT16, BASE_HEX, NULL, 0x0,
"Distance to first user packet", HFILL}
},
{&hf_dvb_s2_bb_crc, {
"Checksum", "dvb-s2_bb.crc",
FT_UINT8, BASE_HEX, NULL, 0x0,
"BB Header CRC-8", HFILL}
},
{&hf_dvb_s2_bb_crc_status, {
"Checksum Status", "dvb-s2_bb.crc.status",
FT_UINT8, BASE_NONE, VALS(proto_checksum_vals), 0x0,
NULL, HFILL}
},
{&hf_dvb_s2_bb_packetized, {
"Packetized Generic Stream Data", "dvb-s2_bb.packetized",
FT_BYTES, BASE_NONE, NULL, 0x0,
"Packetized Generic Stream (non-TS) Data", HFILL}
},
{&hf_dvb_s2_bb_transport, {
"Transport Stream Data", "dvb-s2_bb.transport",
FT_BYTES, BASE_NONE, NULL, 0x0,
"Transport Stream (TS) Data", HFILL}
},
{&hf_dvb_s2_bb_reserved, {
"Reserved Stream Type Data", "dvb-s2_bb.reserved",
FT_BYTES, BASE_NONE, NULL, 0x0,
"Stream of an unknown reserved type", HFILL}
},
{&hf_dvb_s2_bb_df, {
"BBFrame user data", "dvb-s2_bb.df",
FT_BYTES, BASE_NONE, NULL, 0x0,
NULL, HFILL}
},
{&hf_dvb_s2_bb_eip_crc32, {
"EIP CRC32", "dvb-s2_bb.eip_crc32",
FT_UINT32, BASE_HEX, NULL, 0x0,
"Explicit Integrity Protection CRC32", HFILL}
}
};
static gint *ett_bb[] = {
&ett_dvb_s2_bb,
&ett_dvb_s2_bb_matype1
};
/* DVB-S2 GSE Frame */
static hf_register_info hf_gse[] = {
{&hf_dvb_s2_gse_hdr, {
"GSE header", "dvb-s2_gse.hdr",
FT_UINT16, BASE_HEX, NULL, 0x0,
"GSE Header (start/stop/length)", HFILL}
},
{&hf_dvb_s2_gse_hdr_start, {
"Start", "dvb-s2_gse.hdr.start",
FT_BOOLEAN, 16, TFS(&tfs_enabled_disabled), DVB_S2_GSE_HDR_START_MASK,
"Start Indicator", HFILL}
},
{&hf_dvb_s2_gse_hdr_stop, {
"Stop", "dvb-s2_gse.hdr.stop",
FT_BOOLEAN, 16, TFS(&tfs_enabled_disabled), DVB_S2_GSE_HDR_STOP_MASK,
"Stop Indicator", HFILL}
},
{&hf_dvb_s2_gse_hdr_labeltype, {
"Label Type", "dvb-s2_gse.hdr.labeltype",
FT_UINT16, BASE_HEX, VALS(gse_labeltype), DVB_S2_GSE_HDR_LABELTYPE_MASK,
"Label Type Indicator", HFILL}
},
{&hf_dvb_s2_gse_hdr_length, {
"Length", "dvb-s2_gse.hdr.length",
FT_UINT16, BASE_DEC, NULL, DVB_S2_GSE_HDR_LENGTH_MASK,
"GSE Length", HFILL}
},
{&hf_dvb_s2_gse_padding, {
"GSE Padding", "dvb-s2_gse.padding",
FT_UINT16, BASE_DEC, NULL, 0x0,
"GSE Padding Bytes", HFILL}
},
{&hf_dvb_s2_gse_proto_next_header, {
"Protocol", "dvb-s2_gse.proto",
FT_UINT16, BASE_HEX, VALS(gse_proto_next_header_str), 0x0,
"Protocol Type", HFILL}
},
{&hf_dvb_s2_gse_proto_ethertype, {
"Protocol", "dvb-s2_gse.proto",
FT_UINT16, BASE_HEX, VALS(etype_vals), 0x0,
"Protocol Type", HFILL}
},
{&hf_dvb_s2_gse_label6, {
"Label", "dvb-s2_gse.label_ether",
FT_ETHER, BASE_NONE, NULL, 0x0,
"Label Field", HFILL}
},
{&hf_dvb_s2_gse_label3, {
"Label", "dvb-s2_gse.label",
FT_UINT24, BASE_HEX, NULL, 0x0,
"Label Field", HFILL}
},
{&hf_dvb_s2_gse_fragid, {
"Frag ID", "dvb-s2_gse.fragid",
FT_UINT8, BASE_HEX, NULL, 0x0,
"Fragment ID", HFILL}
},
{&hf_dvb_s2_gse_totlength, {
"Total Length", "dvb-s2_gse.totlength",
FT_UINT16, BASE_DEC, NULL, 0x0,
"GSE Total Frame Length", HFILL}
},
{&hf_dvb_s2_gse_exthdr, {
"Extension Header", "dvb-s2_gse.exthdr",
FT_UINT8, BASE_HEX, NULL, 0x0,
"optional Extension Header", HFILL}
},
{&hf_dvb_s2_gse_ncr, {
"NCR Packet", "dvb-s2_gse.ncr",
FT_BYTES, BASE_NONE, NULL, 0x0,
"GSE NCR PAcket", HFILL}
},
{&hf_dvb_s2_gse_data, {
"PDU Data", "dvb-s2_gse.data",
FT_BYTES, BASE_NONE, NULL, 0x0,
"GSE Frame User Data", HFILL}
},
{&hf_dvb_s2_gse_crc32, {
"CRC", "dvb-s2_gse.crc",
FT_UINT32, BASE_HEX, NULL, 0x0,
"CRC-32", HFILL}
},
{ &hf_dvbs2_fragment_overlap,
{ "Fragment overlap", "dvb-s2_gse.fragment.overlap", FT_BOOLEAN, BASE_NONE,
NULL, 0x0, "Fragment overlaps with other fragments", HFILL }},
{ &hf_dvbs2_fragment_overlap_conflict,
{ "Conflicting data in fragment overlap", "dvb-s2_gse.fragment.overlap.conflict",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"Overlapping fragments contained conflicting data", HFILL }},
{ &hf_dvbs2_fragment_multiple_tails,
{ "Multiple tail fragments found", "dvb-s2_gse.fragment.multipletails",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"Several tails were found when defragmenting the packet", HFILL }},
{ &hf_dvbs2_fragment_too_long_fragment,
{ "Fragment too long", "dvb-s2_gse.fragment.toolongfragment",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"Fragment contained data past end of packet", HFILL }},
{ &hf_dvbs2_fragment_error,
{ "Defragmentation error", "dvb-s2_gse.fragment.error", FT_FRAMENUM, BASE_NONE,
NULL, 0x0, "Defragmentation error due to illegal fragments", HFILL }},
{ &hf_dvbs2_fragment_count,
{ "Fragment count", "dvb-s2_gse.fragment.count", FT_UINT32, BASE_DEC,
NULL, 0x0, NULL, HFILL }},
{ &hf_dvbs2_fragment,
{ "DVB-S2 GSE Fragment", "dvb-s2_gse.fragment", FT_FRAMENUM, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_dvbs2_fragments,
{ "DVB-S2 GSE Fragments", "dvb-s2_gse.fragments", FT_BYTES, BASE_NONE,
NULL, 0x0, NULL, HFILL }},
{ &hf_dvbs2_reassembled_in,
{ "Reassembled DVB-S2 GSE in frame", "dvb-s2_gse.reassembled_in", FT_FRAMENUM, BASE_NONE,
NULL, 0x0, "This GSE packet is reassembled in this frame", HFILL }},
{ &hf_dvbs2_reassembled_length,
{ "Reassembled DVB-S2 GSE length", "dvb-s2_gse.reassembled.length", FT_UINT32, BASE_DEC,
NULL, 0x0, "The total length of the reassembled payload", HFILL }},
{ &hf_dvbs2_reassembled_data,
{ "Reassembled DVB-S2 GSE data", "dvb-s2_gse.reassembled.data", FT_BYTES, BASE_NONE,
NULL, 0x0, "The reassembled payload", HFILL }}
};
static gint *ett_gse[] = {
&ett_dvb_s2_gse,
&ett_dvb_s2_gse_hdr,
&ett_dvb_s2_gse_ncr,
&ett_dvbs2_fragments,
&ett_dvbs2_fragment,
};
static ei_register_info ei[] = {
{ &ei_dvb_s2_bb_crc, { "dvb-s2_bb.bad_checksum", PI_CHECKSUM, PI_ERROR, "Bad checksum", EXPFILL }},
{ &ei_dvb_s2_bb_issy_invalid, {"dvb-s2_bb.issy_invalid", PI_PROTOCOL, PI_WARN, "ISSY is active, which is not allowed for GSE packets", EXPFILL }},
{ &ei_dvb_s2_bb_npd_invalid, {"dvb-s2_bb.npd_invalid", PI_PROTOCOL, PI_WARN, "NPD is active, which is not allowed for GSE packets", EXPFILL }},
{ &ei_dvb_s2_bb_upl_invalid, {"dvb-s2_bb.upl_invalid", PI_PROTOCOL, PI_WARN, "User Packet Length non-zero, which is not allowed for GSE packets", EXPFILL }},
{ &ei_dvb_s2_bb_reserved, {"dvb-s2_bb.reserved_frame_format", PI_PROTOCOL, PI_WARN, "Reserved frame format in TS/GS is not defined", EXPFILL }},
{ &ei_dvb_s2_bb_header_ambiguous, { "dvb-s2_bb.header_ambiguous", PI_ASSUMPTION, PI_WARN, "Mode Adaptation header ambiguous", EXPFILL }},
};
expert_module_t* expert_dvb_s2_bb;
proto_dvb_s2_modeadapt = proto_register_protocol("DVB-S2 Mode Adaptation Header", "DVB-S2", "dvb-s2_modeadapt");
proto_dvb_s2_bb = proto_register_protocol("DVB-S2 Baseband Frame", "DVB-S2-BB", "dvb-s2_bb");
proto_dvb_s2_gse = proto_register_protocol("DVB-S2 GSE Packet", "DVB-S2-GSE", "dvb-s2_gse");
proto_register_field_array(proto_dvb_s2_modeadapt, hf_modeadapt, array_length(hf_modeadapt));
proto_register_subtree_array(ett_modeadapt, array_length(ett_modeadapt));
proto_register_field_array(proto_dvb_s2_bb, hf_bb, array_length(hf_bb));
proto_register_subtree_array(ett_bb, array_length(ett_bb));
expert_dvb_s2_bb = expert_register_protocol(proto_dvb_s2_bb);
expert_register_field_array(expert_dvb_s2_bb, ei, array_length(ei));
proto_register_field_array(proto_dvb_s2_gse, hf_gse, array_length(hf_gse));
proto_register_subtree_array(ett_gse, array_length(ett_gse));
dvb_s2_modeadapt_module = prefs_register_protocol(proto_dvb_s2_modeadapt, proto_reg_handoff_dvb_s2_modeadapt);
prefs_register_obsolete_preference(dvb_s2_modeadapt_module, "enable");
prefs_register_bool_preference(dvb_s2_modeadapt_module, "decode_df",
"Enable dissection of DATA FIELD",
"Check this to enable full protocol dissection of data above BBHeader",
&dvb_s2_df_dissection);
prefs_register_bool_preference(dvb_s2_modeadapt_module, "full_decode",
"Enable dissection of GSE data",
"Check this to enable full protocol dissection of data above GSE Layer",
&dvb_s2_full_dissection);
register_init_routine(dvbs2_defragment_init);
}
void proto_reg_handoff_dvb_s2_modeadapt(void)
{
static gboolean prefs_initialized = FALSE;
if (!prefs_initialized) {
heur_dissector_add("udp", dissect_dvb_s2_modeadapt, "DVB-S2 over UDP", "dvb_s2_udp", proto_dvb_s2_modeadapt, HEURISTIC_DISABLE);
ip_handle = find_dissector_add_dependency("ip", proto_dvb_s2_bb);
ipv6_handle = find_dissector_add_dependency("ipv6", proto_dvb_s2_bb);
dvb_s2_table_handle = find_dissector("dvb-s2_table");
eth_withoutfcs_handle = find_dissector("eth_withoutfcs");
data_handle = find_dissector("data");
prefs_initialized = TRUE;
}
}
/*
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: nil
* End:
*
* vi: set shiftwidth=4 tabstop=8 expandtab:
* :indentSize=4:tabSize=8:noTabs=true:
*/
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