/* packet-p_mul.c * * Routines for P_Mul (ACP142) packet disassembly. * A protocol for reliable multicast messaging in bandwidth constrained * and delayed acknowledgement (EMCON) environments. * * Copyright 2005, Stig Bjorlykke , Thales Norway AS * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * SPDX-License-Identifier: GPL-2.0-or-later * * Ref: http://jcs.dtic.mil/j6/cceb/acps/acp142/ */ /* * TODO: * - Obtain dedicated UDP port numbers * - SEQ/ACK analysis for Announce/Request/Reject/Release PDU */ #include "config.h" #include #include #include #include #include #include #include #include #include "packet-cdt.h" #include "packet-ber.h" #include "packet-s5066sis.h" void proto_register_p_mul(void); void proto_reg_handoff_p_mul(void); #define PNAME "P_Mul (ACP142)" #define PSNAME "P_MUL" #define PFNAME "p_mul" /* Recommended UDP Port Numbers */ #define DEFAULT_P_MUL_PORT_RANGE "" /* PDU Types */ #define Data_PDU 0x00 #define Ack_PDU 0x01 #define Address_PDU 0x02 #define Discard_Message_PDU 0x03 #define Announce_PDU 0x04 #define Request_PDU 0x05 #define Reject_PDU 0x06 #define Release_PDU 0x07 #define FEC_Address_PDU 0x08 #define Extra_Address_PDU 0x12 #define Extra_FEC_Address_PDU 0x18 #define Ack_Ack_PDU 0xFF /* Fake type to indicate Ack-Ack */ /* Type of content to decode from Data_PDU */ #define DECODE_NONE 0 #define DECODE_BER 1 #define DECODE_CDT 2 static int proto_p_mul; static int hf_length; static int hf_priority; static int hf_map_first; static int hf_map_last; static int hf_map_unused; static int hf_pdu_type; static int hf_pdu_type_value; static int hf_no_pdus; static int hf_seq_no; static int hf_unused8; static int hf_unused16; static int hf_checksum; static int hf_checksum_good; static int hf_checksum_bad; static int hf_source_id_ack; static int hf_source_id; static int hf_message_id; static int hf_expiry_time; static int hf_mc_group; static int hf_ann_mc_group; static int hf_fec_len; static int hf_fec_id; static int hf_fec_parameters; static int hf_count_of_dest; static int hf_length_of_res; static int hf_ack_count; static int hf_ack_entry; static int hf_ack_length; static int hf_miss_seq_no; static int hf_miss_seq_range; static int hf_miss_seq_range_from; static int hf_miss_seq_range_delimiter; static int hf_miss_seq_range_to; static int hf_tot_miss_seq_no; static int hf_timestamp_option; static int hf_dest_entry; static int hf_dest_id; static int hf_msg_seq_no; static int hf_sym_key; static int hf_data_fragment; static int hf_msg_fragments; static int hf_msg_fragment; static int hf_msg_fragment_overlap; static int hf_msg_fragment_overlap_conflicts; static int hf_msg_fragment_multiple_tails; static int hf_msg_fragment_too_long_fragment; static int hf_msg_fragment_error; static int hf_msg_fragment_count; static int hf_msg_reassembled_in; static int hf_msg_reassembled_length; static int hf_analysis_ack_time; static int hf_analysis_trans_time; static int hf_analysis_retrans_time; static int hf_analysis_total_retrans_time; static int hf_analysis_last_pdu_num; static int hf_analysis_addr_pdu_num; static int hf_analysis_acks_addr_pdu_num; static int hf_analysis_acks_acked_addr_pdu_num; static int hf_analysis_addr_pdu_time; static int hf_analysis_prev_pdu_num; static int hf_analysis_prev_pdu_time; static int hf_analysis_retrans_no; static int hf_analysis_ack_num; static int hf_analysis_ack_missing; static int hf_analysis_ack_dup_no; static int hf_analysis_msg_resend_from; static int hf_analysis_ack_resend_from; static int hf_analysis_total_time; static int ett_p_mul; static int ett_pdu_type; static int ett_dest_entry; static int ett_ack_entry; static int ett_range_entry; static int ett_checksum; static int ett_seq_analysis; static int ett_ack_analysis; static int ett_seq_ack_analysis; static int ett_msg_fragment; static int ett_msg_fragments; static expert_field ei_more_data; static expert_field ei_checksum_bad; static expert_field ei_illegal_seq_no; static expert_field ei_tot_miss_seq_no; static expert_field ei_miss_seq_no; static expert_field ei_analysis_ack_missing; static expert_field ei_miss_seq_range; static expert_field ei_address_pdu_missing; static expert_field ei_analysis_ack_dup_no; static expert_field ei_length; static expert_field ei_analysis_prev_pdu_missing; static expert_field ei_message_discarded; static expert_field ei_ack_length; static expert_field ei_analysis_retrans_no; static dissector_handle_t p_mul_handle; typedef struct _p_mul_id_key { uint32_t id; uint16_t seq; address addr; } p_mul_id_key; typedef struct _p_mul_seq_val { int msg_type; /* Message type */ uint32_t prev_msg_id; /* Previous message package num */ nstime_t prev_msg_time; /* Previous message receive time */ uint32_t addr_id; /* PDU package num for Address_PDU */ nstime_t addr_time; /* PDU received time for Address_PDU */ uint32_t pdu_id; /* PDU package num */ nstime_t pdu_time; /* PDU receive time */ uint32_t prev_pdu_id; /* Previous PDU package num */ nstime_t prev_pdu_time; /* Previous PDU receive time */ uint16_t last_found_pdu; /* Last PDU num */ nstime_t first_msg_time; /* First message receive time */ uint32_t msg_resend_count; /* Message resend counter */ wmem_map_t *ack_data; } p_mul_seq_val; typedef struct _p_mul_ack_data { uint32_t ack_id; /* Ack PDU package num */ uint32_t ack_resend_count; /* Ack resend counter */ } p_mul_ack_data; /* Hash table with current data for seq/ack analysis */ static wmem_map_t *p_mul_id_hash_table; /* User definable values to use for dissection */ static bool p_mul_reassemble = true; static int decode_option = DECODE_NONE; static bool use_relative_msgid = true; static bool use_seq_ack_analysis = true; static reassembly_table p_mul_reassembly_table; static uint32_t message_id_offset; static const fragment_items p_mul_frag_items = { /* Fragment subtrees */ &ett_msg_fragment, &ett_msg_fragments, /* Fragment fields */ &hf_msg_fragments, &hf_msg_fragment, &hf_msg_fragment_overlap, &hf_msg_fragment_overlap_conflicts, &hf_msg_fragment_multiple_tails, &hf_msg_fragment_too_long_fragment, &hf_msg_fragment_error, &hf_msg_fragment_count, /* Reassembled in field */ &hf_msg_reassembled_in, /* Reassembled length field */ &hf_msg_reassembled_length, /* Reassembled data field */ NULL, /* Tag */ "Message fragments" }; static const value_string pdu_vals[] = { { Data_PDU, "Data PDU" }, { Ack_PDU, "Ack PDU" }, { Address_PDU, "Address PDU" }, { Discard_Message_PDU, "Discard Message PDU" }, { Announce_PDU, "Announce PDU" }, { Request_PDU, "Request PDU" }, { Reject_PDU, "Reject PDU" }, { Release_PDU, "Release PDU" }, { FEC_Address_PDU, "FEC Address PDU" }, { Extra_Address_PDU, "Extra Address PDU" }, { Extra_FEC_Address_PDU, "Extra FEC Address PDU" }, { Ack_Ack_PDU, "Ack-Ack PDU" }, { 0, NULL } }; static const enum_val_t decode_options[] = { { "none", "No decoding", DECODE_NONE }, { "ber", "BER encoded ASN.1", DECODE_BER }, { "cdt", "Compressed Data Type", DECODE_CDT }, { NULL, NULL, 0 } }; static const char *get_type (uint8_t value) { return val_to_str_const (value, pdu_vals, "Unknown"); } /* Function checksum, found in ACP 142 annex B04 (Fletcher algorithm) */ static uint16_t checksum_acp142 (uint8_t *buffer, int len, int offset) { uint16_t c0 = 0, c1 = 0, ret, ctmp; int16_t cs; uint8_t *hpp, *pls; if (len < offset+2) { /* Buffer too small */ return 0; } ctmp = len - offset - 1; pls = buffer + len; hpp = buffer; while (hpp < pls) { if ((c0 += *hpp++) > 254) { c0 -= 255; } if ((c1 += c0) > 254) { c1 -= 255; } } if ((cs = ((ctmp * c0) - c1) % 255) < 0) { cs += 255; } ret = cs << 8; if ((cs = (c1 - ((ctmp + 1L) * c0)) % 255) < 0) { cs += 255; } ret |= cs; return ret; } static unsigned p_mul_id_hash (const void *k) { const p_mul_id_key *p_mul = (const p_mul_id_key *)k; return p_mul->id; } static int p_mul_id_hash_equal (const void *k1, const void *k2) { const p_mul_id_key *p_mul1 = (const p_mul_id_key *)k1; const p_mul_id_key *p_mul2 = (const p_mul_id_key *)k2; if (p_mul1->id != p_mul2->id) return 0; if (p_mul1->seq != p_mul2->seq) return 0; return (addresses_equal (&p_mul1->addr, &p_mul2->addr)); } static p_mul_seq_val *lookup_seq_val (uint32_t message_id, uint16_t seq_no, address *addr) { p_mul_seq_val *pkg_data; p_mul_id_key *p_mul_key = wmem_new(wmem_file_scope(), p_mul_id_key); p_mul_key->id = message_id; p_mul_key->seq = seq_no; copy_address_wmem(wmem_file_scope(), &p_mul_key->addr, addr); pkg_data = (p_mul_seq_val *) wmem_map_lookup (p_mul_id_hash_table, p_mul_key); return pkg_data; } static void copy_hashtable_data (void *key, void *value, void *user_data) { p_mul_ack_data *ack_data1 = (p_mul_ack_data*)value; p_mul_ack_data *ack_data2; wmem_map_t *table = (wmem_map_t*)user_data; ack_data2 = wmem_new(wmem_file_scope(), p_mul_ack_data); ack_data2->ack_id = ack_data1->ack_id; ack_data2->ack_resend_count = ack_data1->ack_resend_count; wmem_map_insert (table, key, ack_data2); } static p_mul_seq_val *register_p_mul_id (packet_info *pinfo, address *addr, uint32_t dstIP, uint8_t pdu_type, uint32_t message_id, uint16_t seq_no, int no_missing) { p_mul_seq_val *p_mul_data = NULL, *pkg_data = NULL; p_mul_id_key *p_mul_key; p_mul_ack_data *ack_data = NULL; nstime_t addr_time, prev_time; unsigned addr_id = 0, prev_id = 0; uint16_t last_found_pdu = 0; bool missing_pdu = false, need_set_address = false; wmem_map_t *pkg_list; if (pinfo->flags.in_error_pkt) { /* No analysis of error packets */ return NULL; } if (pdu_type == Data_PDU && seq_no == 0) { /* Illegal sequence number for Data PDU */ return NULL; } nstime_set_zero(&addr_time); nstime_set_zero(&prev_time); p_mul_key = wmem_new(wmem_file_scope(), p_mul_id_key); if (!pinfo->fd->visited && (pdu_type == Address_PDU || pdu_type == Data_PDU || pdu_type == Discard_Message_PDU)) { /* Try to match corresponding address PDU */ p_mul_key->id = message_id; p_mul_key->seq = 0; copy_address_wmem(wmem_file_scope(), &p_mul_key->addr, addr); need_set_address = true; p_mul_data = (p_mul_seq_val *) wmem_map_lookup (p_mul_id_hash_table, p_mul_key); if (p_mul_data) { /* Found address PDU */ last_found_pdu = p_mul_data->last_found_pdu; p_mul_data->last_found_pdu = seq_no; addr_id = p_mul_data->pdu_id; addr_time = p_mul_data->pdu_time; /* Save data for last found PDU */ p_mul_data->prev_pdu_id = pinfo->num; p_mul_data->prev_pdu_time = pinfo->abs_ts; if (pdu_type == Data_PDU && p_mul_data->msg_resend_count == 0 && last_found_pdu != seq_no - 1) { /* Data_PDU and missing previous PDU */ missing_pdu = true; } if (last_found_pdu) { /* Try to match previous data PDU */ p_mul_key->seq = last_found_pdu; p_mul_data = (p_mul_seq_val *) wmem_map_lookup (p_mul_id_hash_table, p_mul_key); } if (p_mul_data) { /* Found a previous PDU (Address or Data) */ if (p_mul_data->prev_msg_id > 0) { prev_id = p_mul_data->prev_msg_id; } else { prev_id = p_mul_data->pdu_id; } prev_time = p_mul_data->pdu_time; } } else if (pdu_type == Address_PDU) { addr_id = pinfo->num; addr_time = pinfo->abs_ts; } } pkg_list = (wmem_map_t *)p_get_proto_data(wmem_file_scope(), pinfo, proto_p_mul, 0); if (!pkg_list) { /* Never saved list for this packet, create a new */ pkg_list = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal); p_add_proto_data(wmem_file_scope(), pinfo, proto_p_mul, 0, pkg_list); } if (!pinfo->fd->visited) { p_mul_key->id = message_id; p_mul_key->seq = seq_no; if (!need_set_address) { copy_address_wmem(wmem_file_scope(), &p_mul_key->addr, addr); } p_mul_data = (p_mul_seq_val *) wmem_map_lookup (p_mul_id_hash_table, p_mul_key); if (p_mul_data) { if (pdu_type == Ack_PDU) { /* Only save this data if positive ack */ if (no_missing == 0) { ack_data = (p_mul_ack_data *)wmem_map_lookup (p_mul_data->ack_data, GUINT_TO_POINTER(dstIP)); if (!ack_data) { /* Only save reference to first ACK */ ack_data = wmem_new0(wmem_file_scope(), p_mul_ack_data); ack_data->ack_id = pinfo->num; wmem_map_insert (p_mul_data->ack_data, GUINT_TO_POINTER(dstIP), ack_data); } else { /* Only count when resending */ ack_data->ack_resend_count++; } } } else { /* Message resent */ p_mul_data->msg_resend_count++; p_mul_data->prev_msg_id = pinfo->num; p_mul_data->prev_msg_time = p_mul_data->pdu_time; p_mul_data->pdu_time = pinfo->abs_ts; if (pdu_type == Data_PDU) { p_mul_data->prev_pdu_id = prev_id; p_mul_data->prev_pdu_time = prev_time; } } } else { /* New message */ if (pdu_type == Ack_PDU) { /* Data is just copied to the structure and never stored, so keep a "more temporary" structure */ p_mul_data = wmem_new0(pinfo->pool, p_mul_seq_val); } else { p_mul_data = wmem_new0(wmem_file_scope(), p_mul_seq_val); } p_mul_data->msg_type = pdu_type; if (pdu_type == Address_PDU || pdu_type == Ack_PDU) { p_mul_data->ack_data = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal); } if (pdu_type == Ack_PDU) { /* No matching message for this ack */ ack_data = wmem_new0(wmem_file_scope(), p_mul_ack_data); ack_data->ack_id = pinfo->num; wmem_map_insert (p_mul_data->ack_data, GUINT_TO_POINTER(dstIP), ack_data); } else { p_mul_data->pdu_id = pinfo->num; p_mul_data->pdu_time = pinfo->abs_ts; p_mul_data->addr_id = addr_id; p_mul_data->addr_time = addr_time; p_mul_data->first_msg_time = pinfo->abs_ts; if (pdu_type == Data_PDU && !missing_pdu) { p_mul_data->prev_pdu_id = prev_id; p_mul_data->prev_pdu_time = prev_time; } wmem_map_insert (p_mul_id_hash_table, p_mul_key, p_mul_data); } } /* Copy the current package data to the frame */ pkg_data = wmem_new(wmem_file_scope(), p_mul_seq_val); *pkg_data = *p_mul_data; if (p_mul_data->ack_data) { /* Copy the hash table for ack data */ pkg_data->ack_data = wmem_map_new(wmem_file_scope(), g_direct_hash, g_direct_equal); wmem_map_foreach (p_mul_data->ack_data, copy_hashtable_data, pkg_data->ack_data); } wmem_map_insert(pkg_list, GUINT_TO_POINTER(message_id), pkg_data); } else { /* Fetch last values from data saved in packet */ pkg_data = (p_mul_seq_val *)wmem_map_lookup (pkg_list, GUINT_TO_POINTER(message_id)); } DISSECTOR_ASSERT (pkg_data); return pkg_data; } static void add_ack_analysis (tvbuff_t *tvb, packet_info *pinfo, proto_tree *p_mul_tree, int offset, uint8_t pdu_type, address *src, address *dst, uint32_t message_id, int no_missing) { proto_tree *analysis_tree = NULL; proto_item *sa = NULL; proto_item *en = NULL; p_mul_seq_val *pkg_data = NULL; p_mul_ack_data *ack_data = NULL; bool item_added = false; uint32_t dstIp; nstime_t ns; if (pinfo->flags.in_error_pkt) { /* No analysis of error packets */ return; } if (pdu_type == Address_PDU) { analysis_tree = proto_tree_add_subtree(p_mul_tree, tvb, 0, 0, ett_ack_analysis, &sa, "ACK analysis"); proto_item_set_generated (sa); /* Fetch package data */ if ((pkg_data = lookup_seq_val (message_id, 0, src)) == NULL) { /* No need for seq/ack analysis yet */ return; } if (dst == NULL) { /* Ack-Ack */ if (pkg_data->addr_id) { en = proto_tree_add_uint (analysis_tree, hf_analysis_acks_acked_addr_pdu_num, tvb, 0, 0, pkg_data->addr_id); proto_item_set_generated (en); nstime_delta (&ns, &pinfo->abs_ts, &pkg_data->addr_time); en = proto_tree_add_time (analysis_tree, hf_analysis_total_time, tvb, 0, 0, &ns); proto_item_set_generated (en); } else { proto_tree_add_expert(analysis_tree, pinfo, &ei_address_pdu_missing, tvb, offset, 0); } item_added = true; } else { memcpy((uint8_t *)&dstIp, dst->data, 4); if (pkg_data->ack_data) { ack_data = (p_mul_ack_data *)wmem_map_lookup (pkg_data->ack_data, GUINT_TO_POINTER(dstIp)); } /* Add reference to Ack_PDU */ if (ack_data && ack_data->ack_id) { en = proto_tree_add_uint (analysis_tree, hf_analysis_ack_num, tvb, 0, 0, ack_data->ack_id); proto_item_set_generated (en); item_added = true; } else if (!pkg_data->msg_resend_count) { en = proto_tree_add_item (analysis_tree, hf_analysis_ack_missing, tvb, offset, 0, ENC_NA); if (pinfo->fd->visited) { /* We do not know this on first visit and we do not want to add a entry in the "Expert Severity Info" for this note */ expert_add_info(pinfo, en, &ei_analysis_ack_missing); proto_item_set_generated (en); } item_added = true; } } if (!item_added) { proto_item_set_hidden (sa); } } else if (pdu_type == Ack_PDU) { analysis_tree = proto_tree_add_subtree(p_mul_tree, tvb, 0, 0, ett_seq_ack_analysis, &sa, "SEQ/ACK analysis"); proto_item_set_generated (sa); /* Fetch package data */ memcpy((uint8_t *)&dstIp, dst->data, 4); if ((pkg_data = register_p_mul_id (pinfo, src, dstIp, pdu_type, message_id, 0, no_missing)) == NULL) { /* No need for seq/ack analysis yet */ return; } if (pkg_data->ack_data) { ack_data = (p_mul_ack_data *)wmem_map_lookup(pkg_data->ack_data, GUINT_TO_POINTER(dstIp)); } /* Add reference to Address_PDU */ if (pkg_data->msg_type != Ack_PDU) { en = proto_tree_add_uint (analysis_tree, hf_analysis_acks_addr_pdu_num, tvb, 0, 0, pkg_data->pdu_id); proto_item_set_generated (en); if (no_missing == 0) { nstime_delta (&ns, &pinfo->abs_ts, &pkg_data->first_msg_time); en = proto_tree_add_time (analysis_tree, hf_analysis_trans_time, tvb, 0, 0, &ns); proto_item_set_generated (en); } } else { proto_tree_add_expert(analysis_tree, pinfo, &ei_address_pdu_missing, tvb, offset, 0); } if (pkg_data->msg_type != Ack_PDU && pkg_data->prev_pdu_id) { /* Add reference to previous PDU */ en = proto_tree_add_uint (analysis_tree, hf_analysis_last_pdu_num, tvb, 0, 0, pkg_data->prev_pdu_id); proto_item_set_generated (en); nstime_delta (&ns, &pinfo->abs_ts, &pkg_data->prev_pdu_time); en = proto_tree_add_time (analysis_tree, hf_analysis_ack_time, tvb, 0, 0, &ns); proto_item_set_generated (en); } if (ack_data && ack_data->ack_resend_count) { /* Add resend statistics */ en = proto_tree_add_uint (analysis_tree, hf_analysis_ack_dup_no, tvb, 0, 0, ack_data->ack_resend_count); proto_item_set_generated (en); expert_add_info_format(pinfo, en, &ei_analysis_ack_dup_no, "Dup ACK #%d", ack_data->ack_resend_count); en = proto_tree_add_uint (analysis_tree, hf_analysis_ack_resend_from, tvb, 0, 0, ack_data->ack_id); proto_item_set_generated (en); col_append_fstr (pinfo->cinfo, COL_INFO, "[Dup ACK %d#%d] ", ack_data->ack_id, ack_data->ack_resend_count); } } } static p_mul_seq_val *add_seq_analysis (tvbuff_t *tvb, packet_info *pinfo, proto_tree *p_mul_tree, address *src, int offset, uint8_t pdu_type, uint32_t message_id, uint16_t seq_no, int no_missing) { p_mul_seq_val *pkg_data; proto_tree *analysis_tree; proto_item *sa, *en = NULL, *eh = NULL; bool item_added = false; nstime_t ns; pkg_data = register_p_mul_id (pinfo, src, 0, pdu_type, message_id, seq_no, no_missing); if (!pkg_data) { /* No need for seq/ack analysis */ return NULL; } analysis_tree = proto_tree_add_subtree(p_mul_tree, tvb, 0, 0, ett_seq_analysis, &sa, "SEQ analysis"); proto_item_set_generated (sa); if (pdu_type == Data_PDU || pdu_type == Discard_Message_PDU) { /* Add reference to Address_PDU */ if (pkg_data->addr_id) { en = proto_tree_add_uint (analysis_tree, hf_analysis_addr_pdu_num, tvb, 0, 0, pkg_data->addr_id); proto_item_set_generated (en); nstime_delta (&ns, &pinfo->abs_ts, &pkg_data->addr_time); en = proto_tree_add_time (analysis_tree, hf_analysis_addr_pdu_time, tvb, 0, 0, &ns); proto_item_set_generated (en); if (pkg_data->prev_pdu_id == pkg_data->addr_id) { /* Previous pdu time is the same as time since address pdu */ en = proto_tree_add_time (analysis_tree, hf_analysis_prev_pdu_time, tvb, 0, 0, &ns); proto_item_set_generated (en); } item_added = true; } else if (!pkg_data->msg_resend_count) { proto_tree_add_expert(analysis_tree, pinfo, &ei_address_pdu_missing, tvb, offset, 0); item_added = true; } } if ((pdu_type == Data_PDU) && (pkg_data->prev_pdu_id != pkg_data->addr_id)) { /* Add reference to previous Data_PDU */ if (pkg_data->prev_pdu_id) { en = proto_tree_add_uint (analysis_tree, hf_analysis_prev_pdu_num, tvb, 0, 0, pkg_data->prev_pdu_id); proto_item_set_generated (en); nstime_delta (&ns, &pinfo->abs_ts, &pkg_data->prev_pdu_time); en = proto_tree_add_time (analysis_tree, hf_analysis_prev_pdu_time, tvb, 0, 0, &ns); proto_item_set_generated (en); item_added = true; } else if (!pkg_data->msg_resend_count) { proto_tree_add_expert(analysis_tree, pinfo, &ei_analysis_prev_pdu_missing, tvb, offset, 0); item_added = true; } } if ((pdu_type == Address_PDU) || (pdu_type == Data_PDU) || (pdu_type == Discard_Message_PDU)) { /* Add resend statistics */ if (pkg_data->msg_resend_count) { en = proto_tree_add_uint (analysis_tree, hf_analysis_retrans_no, tvb, 0, 0, pkg_data->msg_resend_count); proto_item_set_generated (en); en = proto_tree_add_uint (analysis_tree, hf_analysis_msg_resend_from, tvb, 0, 0, pkg_data->pdu_id); proto_item_set_generated (en); expert_add_info_format(pinfo, en, &ei_analysis_retrans_no, "Retransmission #%d", pkg_data->msg_resend_count); nstime_delta (&ns, &pinfo->abs_ts, &pkg_data->prev_msg_time); en = proto_tree_add_time (analysis_tree, hf_analysis_retrans_time, tvb, 0, 0, &ns); proto_item_set_generated (en); nstime_delta (&ns, &pinfo->abs_ts, &pkg_data->first_msg_time); eh = proto_tree_add_time (analysis_tree, hf_analysis_total_retrans_time, tvb, 0, 0, &ns); proto_item_set_generated (eh); if (pkg_data->first_msg_time.secs == pkg_data->prev_msg_time.secs && pkg_data->first_msg_time.nsecs == pkg_data->prev_msg_time.nsecs) { /* Time values does not differ, hide the total time */ proto_item_set_hidden (eh); } item_added = true; col_append_fstr (pinfo->cinfo, COL_INFO, "[Retrans %d#%d] ", pkg_data->pdu_id, pkg_data->msg_resend_count); } } if (!item_added) { proto_item_set_hidden (sa); } return pkg_data; } static void dissect_reassembled_data (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { DISSECTOR_ASSERT(tvb != NULL); switch (decode_option) { case DECODE_BER: dissect_unknown_ber (pinfo, tvb, 0, tree); break; case DECODE_CDT: dissect_cdt (tvb, pinfo, tree); break; default: call_data_dissector(tvb, pinfo, tree); break; } } static int dissect_p_mul (tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { proto_tree *p_mul_tree, *field_tree, *checksum_tree; proto_item *ti, *en, *len_en; bool save_fragmented; uint32_t message_id = 0; uint16_t no_dest = 0, count = 0, len, data_len = 0; uint16_t checksum_calc, checksum_found; uint16_t pdu_length, no_pdus = 0, seq_no = 0; uint8_t pdu_type, *value, map = 0, fec_len; int i, tot_no_missing = 0, no_missing = 0, offset = 0; address src, dst; wmem_strbuf_t *message_id_list = NULL; bool fletcher = false; col_set_str (pinfo->cinfo, COL_PROTOCOL, "P_MUL"); col_clear (pinfo->cinfo, COL_INFO); /* First fetch PDU Type */ pdu_type = tvb_get_uint8 (tvb, offset + 3) & 0x3F; ti = proto_tree_add_item (tree, proto_p_mul, tvb, offset, -1, ENC_NA); proto_item_append_text (ti, ", %s", get_type (pdu_type)); p_mul_tree = proto_item_add_subtree (ti, ett_p_mul); /* Length of PDU */ pdu_length = tvb_get_ntohs (tvb, offset); len_en = proto_tree_add_item (p_mul_tree, hf_length, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; switch (pdu_type) { case Data_PDU: case Ack_PDU: case Address_PDU: case Discard_Message_PDU: case Extra_Address_PDU: case FEC_Address_PDU: case Extra_FEC_Address_PDU: /* Priority */ proto_tree_add_item (p_mul_tree, hf_priority, tvb, offset, 1, ENC_BIG_ENDIAN); break; default: /* Unused */ proto_tree_add_item (p_mul_tree, hf_unused8, tvb, offset, 1, ENC_BIG_ENDIAN); } offset += 1; /* MAP / PDU_Type */ en = proto_tree_add_uint_format (p_mul_tree, hf_pdu_type, tvb, offset, 1, pdu_type, "PDU Type: %s (0x%02x)", get_type (pdu_type), pdu_type); field_tree = proto_item_add_subtree (en, ett_pdu_type); if (pdu_type == Discard_Message_PDU) { expert_add_info(pinfo, en, &ei_message_discarded); } switch (pdu_type) { case Address_PDU: case Announce_PDU: case Extra_Address_PDU: case FEC_Address_PDU: case Extra_FEC_Address_PDU: map = tvb_get_uint8 (tvb, offset); proto_tree_add_item (field_tree, hf_map_first, tvb, offset, 1, ENC_BIG_ENDIAN); proto_tree_add_item (field_tree, hf_map_last, tvb, offset, 1, ENC_BIG_ENDIAN); if ((map & 0x80) || (map & 0x40)) { proto_item_append_text (en, ", %s / %s", (map & 0x80) ? "Not first" : "First", (map & 0x40) ? "Not last" : "Last"); } else { proto_item_append_text (en, ", Only one PDU"); } break; default: proto_tree_add_item (field_tree, hf_map_unused, tvb, offset, 1, ENC_BIG_ENDIAN); break; } proto_tree_add_item (field_tree, hf_pdu_type_value, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; switch (pdu_type) { case Address_PDU: case Extra_Address_PDU: case FEC_Address_PDU: case Extra_FEC_Address_PDU: /* Total Number of PDUs */ no_pdus = tvb_get_ntohs (tvb, offset); seq_no = 0; proto_tree_add_item (p_mul_tree, hf_no_pdus, tvb, offset, 2, ENC_BIG_ENDIAN); proto_item_append_text (ti, ", No PDUs: %u", no_pdus); break; case Data_PDU: /* Sequence Number of PDUs */ seq_no = tvb_get_ntohs (tvb, offset); en = proto_tree_add_item (p_mul_tree, hf_seq_no, tvb, offset, 2, ENC_BIG_ENDIAN); if (seq_no == 0) { expert_add_info(pinfo, en, &ei_illegal_seq_no); } proto_item_append_text (ti, ", Seq no: %u", seq_no); break; case Announce_PDU: /* Count of Destination Entries */ count = tvb_get_ntohs (tvb, offset); proto_tree_add_item (p_mul_tree, hf_count_of_dest, tvb, offset, 2, ENC_BIG_ENDIAN); break; default: /* Unused */ proto_tree_add_item (p_mul_tree, hf_unused16, tvb, offset, 2, ENC_BIG_ENDIAN); break; } offset += 2; /* Checksum */ en = proto_tree_add_item (p_mul_tree, hf_checksum, tvb, offset, 2, ENC_BIG_ENDIAN); checksum_tree = proto_item_add_subtree (en, ett_checksum); len = tvb_captured_length (tvb); value = (uint8_t *)tvb_memdup (pinfo->pool, tvb, 0, len); if (len >= offset+2) { value[offset] = 0; value[offset+1] = 0; } checksum_found = tvb_get_ntohs (tvb, offset); /* This computed IP checksum is network-byte-order, so convert to host-byte-order */ checksum_calc = g_ntohs (ip_checksum (value, len)); if (checksum_calc != checksum_found) { uint16_t checksum1 = checksum_acp142 (value, len, offset); if (checksum1 == checksum_found) { checksum_calc = checksum1; fletcher = true; } } if (checksum_calc == checksum_found) { if (fletcher) { proto_item_append_text (en, " [Fletcher algorithm]"); } proto_item_append_text (en, " (correct)"); en = proto_tree_add_boolean (checksum_tree, hf_checksum_good, tvb, offset, 2, true); proto_item_set_generated (en); en = proto_tree_add_boolean (checksum_tree, hf_checksum_bad, tvb, offset, 2, false); proto_item_set_generated (en); } else { proto_item_append_text (en, " (incorrect, should be 0x%04x)", checksum_calc); expert_add_info(pinfo, en, &ei_checksum_bad); en = proto_tree_add_boolean (checksum_tree, hf_checksum_good, tvb, offset, 2, false); proto_item_set_generated (en); en = proto_tree_add_boolean (checksum_tree, hf_checksum_bad, tvb, offset, 2, true); proto_item_set_generated (en); } offset += 2; if (pdu_type == Ack_PDU) { /* Source ID of Ack Sender */ set_address_tvb (&dst, AT_IPv4, 4, tvb, offset); proto_tree_add_item (p_mul_tree, hf_source_id_ack, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; /* Count of Ack Info Entries */ count = tvb_get_ntohs (tvb, offset); proto_tree_add_item (p_mul_tree, hf_ack_count, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; } else { /* Source Id */ set_address_tvb (&src, AT_IPv4, 4, tvb, offset); proto_tree_add_item (p_mul_tree, hf_source_id, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; /* Message Id */ message_id = tvb_get_ntohl (tvb, offset); if (use_relative_msgid) { if (message_id_offset == 0) { /* First P_Mul package - initialize message_id_offset */ message_id_offset = message_id; } message_id -= message_id_offset; proto_tree_add_uint_format_value(p_mul_tree, hf_message_id, tvb, offset, 4, message_id, "%u (relative message id)", message_id); } else { proto_tree_add_item (p_mul_tree, hf_message_id, tvb, offset, 4, ENC_BIG_ENDIAN); } offset += 4; proto_item_append_text (ti, ", MSID: %u", message_id); } if (pdu_type == Address_PDU || pdu_type == Announce_PDU || pdu_type == Extra_Address_PDU || pdu_type == FEC_Address_PDU || pdu_type == Extra_FEC_Address_PDU) { /* Expiry Time */ proto_tree_add_item (p_mul_tree, hf_expiry_time, tvb, offset, 4, ENC_TIME_SECS|ENC_BIG_ENDIAN); offset += 4; } if (pdu_type == FEC_Address_PDU || pdu_type == Extra_FEC_Address_PDU) { /* FEC Parameters Length */ fec_len = tvb_get_uint8 (tvb, offset); proto_tree_add_item (p_mul_tree, hf_fec_len, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; /* FEC ID */ proto_tree_add_item (p_mul_tree, hf_fec_id, tvb, offset, 1, ENC_BIG_ENDIAN); offset += 1; if (fec_len > 0) { /* FEC Parameters */ proto_tree_add_none_format (p_mul_tree, hf_fec_parameters, tvb, offset, fec_len, "FEC Parameters (%d byte%s)", fec_len, plurality (fec_len, "", "s")); offset += fec_len; } } switch (pdu_type) { case Address_PDU: case Extra_Address_PDU: case FEC_Address_PDU: case Extra_FEC_Address_PDU: /* Count of Destination Entries */ no_dest = tvb_get_ntohs (tvb, offset); proto_tree_add_item (p_mul_tree, hf_count_of_dest, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; /* Length of Reserved Field */ len = tvb_get_ntohs (tvb, offset); proto_tree_add_item (p_mul_tree, hf_length_of_res, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; for (i = 0; i < no_dest; i++) { /* Destination Entry */ en = proto_tree_add_none_format (p_mul_tree, hf_dest_entry, tvb, offset, 8 + len, "Destination Entry #%d", i + 1); field_tree = proto_item_add_subtree (en, ett_dest_entry); /* Destination Id */ set_address_tvb (&dst, AT_IPv4, 4, tvb, offset); proto_tree_add_item (field_tree, hf_dest_id, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; /* Message Sequence Number */ proto_tree_add_item (field_tree, hf_msg_seq_no, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; if (len > 0) { /* Reserved Field (variable length) */ proto_tree_add_none_format (field_tree, hf_sym_key, tvb, offset, len, "Symmetric Key (%d byte%s)", len, plurality (len, "", "s")); offset += len; } if (use_seq_ack_analysis) { add_ack_analysis (tvb, pinfo, field_tree, offset, pdu_type, &src, &dst, message_id, 0); } } if (no_dest == 0 && use_seq_ack_analysis) { /* Add Ack-Ack analysis */ add_ack_analysis (tvb, pinfo, p_mul_tree, offset, pdu_type, &src, NULL, message_id, 0); } proto_item_append_text (ti, ", Count of Dest: %u", no_dest); break; case Data_PDU: /* Fragment of Data (variable length) */ data_len = tvb_captured_length_remaining (tvb, offset); proto_tree_add_none_format (p_mul_tree, hf_data_fragment, tvb, offset, data_len, "Fragment %d of Data (%d byte%s)", seq_no, data_len, plurality (data_len, "", "s")); break; case Ack_PDU: message_id_list = wmem_strbuf_create(pinfo->pool); for (i = 0; i < count; i++) { /* Ack Info Entry */ len = tvb_get_ntohs (tvb, offset); en = proto_tree_add_none_format (p_mul_tree, hf_ack_entry, tvb, offset, len, "Ack Info Entry #%d", i + 1); field_tree = proto_item_add_subtree (en, ett_ack_entry); /* Length of Ack Info Entry */ en = proto_tree_add_item (field_tree, hf_ack_length, tvb, offset, 2, ENC_BIG_ENDIAN); offset += 2; if (len < 10) { proto_item_append_text (en, " (invalid length)"); expert_add_info(pinfo, en, &ei_ack_length); } /* Source Id */ set_address_tvb (&src, AT_IPv4, 4, tvb, offset); proto_tree_add_item (field_tree, hf_source_id, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; /* Message Id */ message_id = tvb_get_ntohl (tvb, offset); if (use_relative_msgid) { if (message_id_offset == 0) { /* First P_Mul package - initialize message_id_offset */ message_id_offset = message_id; } message_id -= message_id_offset; proto_tree_add_uint_format_value(field_tree, hf_message_id, tvb, offset, 4, message_id, "%u (relative message id)", message_id); } else { proto_tree_add_item (field_tree, hf_message_id, tvb, offset, 4, ENC_BIG_ENDIAN); } offset += 4; if (i == 0) { wmem_strbuf_append_printf (message_id_list, "%u", message_id); } else { wmem_strbuf_append_printf (message_id_list, ",%u", message_id); } if (len > 10) { int num_seq_no = (len - 10) / 2; uint16_t ack_seq_no, prev_ack_seq_no = 0; for (no_missing = 0; no_missing < num_seq_no; no_missing++) { /* Missing Data PDU Seq Number */ ack_seq_no = tvb_get_ntohs (tvb, offset); if ((ack_seq_no != 0) && (no_missing < num_seq_no - 2) && tvb_get_ntohs (tvb, offset + 2) == 0) { /* We are handling a range */ uint16_t end_seq_no = tvb_get_ntohs (tvb, offset + 4); en = proto_tree_add_bytes_format_value(field_tree, hf_miss_seq_range, tvb, offset, 6, NULL, "%d - %d", ack_seq_no, end_seq_no); if (ack_seq_no >= end_seq_no) { proto_item_append_text (en, " (invalid)"); expert_add_info(pinfo, en, &ei_miss_seq_range); } else { proto_tree *missing_tree = proto_item_add_subtree (en, ett_range_entry); proto_tree_add_item (missing_tree, hf_miss_seq_range_from, tvb, offset, 2, ENC_BIG_ENDIAN); proto_tree_add_item (missing_tree, hf_miss_seq_range_delimiter, tvb, offset + 2, 2, ENC_BIG_ENDIAN); proto_tree_add_item (missing_tree, hf_miss_seq_range_to, tvb, offset + 4, 2, ENC_BIG_ENDIAN); tot_no_missing += (end_seq_no - ack_seq_no + 1); } offset += 6; no_missing += 2; /* Skip the next two */ prev_ack_seq_no = end_seq_no; } else { /* No range, handle one seq no */ en = proto_tree_add_item (field_tree, hf_miss_seq_no, tvb,offset, 2, ENC_BIG_ENDIAN); offset += 2; if (ack_seq_no == 0) { proto_item_append_text (en, " (invalid)"); expert_add_info(pinfo, en, &ei_miss_seq_no); } else if (ack_seq_no <= prev_ack_seq_no) { proto_item_append_text (en, " (end of list indicator)"); } else { tot_no_missing++; } prev_ack_seq_no = ack_seq_no; } } } if (use_seq_ack_analysis) { add_ack_analysis (tvb, pinfo, field_tree, offset, pdu_type, &src, &dst, message_id, no_missing); } } proto_item_append_text (ti, ", Count of Ack: %u", count); if (tvb_reported_length_remaining (tvb, offset) >= 8) { /* Timestamp Option (in units of 100ms) */ uint64_t timestamp; timestamp = tvb_get_ntoh64 (tvb, offset); proto_tree_add_uint64_format_value(p_mul_tree, hf_timestamp_option, tvb, offset, 8, timestamp, "%" PRId64 ".%d second%s (%" PRIu64 ")", timestamp / 10, (int) timestamp % 10, (timestamp == 10) ? "" : "s", timestamp); offset += 8; } if (tot_no_missing) { proto_item_append_text (ti, ", Missing seq numbers: %u", tot_no_missing); en = proto_tree_add_uint (p_mul_tree, hf_tot_miss_seq_no, tvb, 0, 0, tot_no_missing); proto_item_set_generated (en); expert_add_info_format(pinfo, en, &ei_tot_miss_seq_no, "Missing seq numbers: %d", tot_no_missing); } break; case Discard_Message_PDU: seq_no = UINT16_MAX; /* To make the seq_no uniq */ break; case Announce_PDU: /* Announced Multicast Group */ proto_tree_add_item (p_mul_tree, hf_ann_mc_group, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; for (i = 0; i < count; i++) { /* Destination Id */ proto_tree_add_item (p_mul_tree, hf_dest_id, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; } break; case Request_PDU: case Reject_PDU: case Release_PDU: /* Multicast Group */ proto_tree_add_item (p_mul_tree, hf_mc_group, tvb, offset, 4, ENC_BIG_ENDIAN); offset += 4; break; default: /* Nothing */ break; } /* Add SEQ/ACK analysis entry */ if (use_seq_ack_analysis && (pdu_type <= Discard_Message_PDU) && (pdu_type != Ack_PDU) && (pdu_type != Address_PDU || no_dest != 0)) { add_seq_analysis (tvb, pinfo, p_mul_tree, &src, offset, pdu_type, message_id, seq_no, tot_no_missing); } /* Check if printing Ack-Ack */ if (pdu_type == Address_PDU && no_dest == 0) { col_append_str (pinfo->cinfo, COL_INFO, get_type (Ack_Ack_PDU)); } else { col_append_str (pinfo->cinfo, COL_INFO, get_type (pdu_type)); } if (pdu_type == Address_PDU || pdu_type == Extra_Address_PDU || pdu_type == FEC_Address_PDU || pdu_type == Extra_FEC_Address_PDU) { col_append_fstr (pinfo->cinfo, COL_INFO, ", No PDUs: %u", no_pdus); } else if (pdu_type == Data_PDU) { col_append_fstr (pinfo->cinfo, COL_INFO, ", Seq no: %u", seq_no); } if (pdu_type == Address_PDU || pdu_type == Extra_Address_PDU || pdu_type == FEC_Address_PDU || pdu_type == Extra_FEC_Address_PDU) { if (no_dest > 0) { col_append_fstr (pinfo->cinfo, COL_INFO, ", Count of Dest: %u", no_dest); } } else if (pdu_type == Ack_PDU) { if (tot_no_missing) { col_append_fstr (pinfo->cinfo, COL_INFO, ", Missing seq numbers: %u", tot_no_missing); } col_append_fstr (pinfo->cinfo, COL_INFO, ", Count of Ack: %u", count); } if (pdu_type != Ack_PDU) { col_append_fstr (pinfo->cinfo, COL_INFO, ", MSID: %u", message_id); } else { if (message_id_list && wmem_strbuf_get_len(message_id_list) > 0) { col_append_fstr (pinfo->cinfo, COL_INFO, ", MSID: %s", wmem_strbuf_get_str(message_id_list)); } } if (p_mul_reassemble) { save_fragmented = pinfo->fragmented; if (pdu_type == Address_PDU && no_pdus > 0) { /* Start fragment table */ fragment_start_seq_check (&p_mul_reassembly_table, pinfo, message_id, NULL, no_pdus - 1); } else if (pdu_type == Data_PDU) { fragment_head *frag_msg; tvbuff_t *new_tvb; pinfo->fragmented = true; /* Add fragment to fragment table */ frag_msg = fragment_add_seq_check (&p_mul_reassembly_table, tvb, offset, pinfo, message_id, NULL, seq_no - 1, data_len, true); new_tvb = process_reassembled_data (tvb, offset, pinfo, "Reassembled P_MUL", frag_msg, &p_mul_frag_items, NULL, tree); if (frag_msg) col_append_str (pinfo->cinfo, COL_INFO, " (Message Reassembled)"); if (new_tvb) { dissect_reassembled_data (new_tvb, pinfo, tree); } } pinfo->fragmented = save_fragmented; } /* Update length of P_Mul packet and check length values */ proto_item_set_len (ti, offset); if (pdu_length != (offset + data_len)) { proto_item_append_text (len_en, " (incorrect, should be: %d)", offset + data_len); expert_add_info(pinfo, len_en, &ei_length); } else if ((len = tvb_reported_length_remaining (tvb, pdu_length)) > 0) { proto_item_append_text (len_en, " (more data in packet: %d)", len); expert_add_info(pinfo, len_en, &ei_more_data); } return offset; } static void p_mul_init_routine (void) { message_id_offset = 0; } void proto_register_p_mul (void) { static hf_register_info hf[] = { { &hf_length, { "Length of PDU", "p_mul.length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_priority, { "Priority", "p_mul.priority", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_map_first, { "First", "p_mul.first", FT_BOOLEAN, 8, TFS (&tfs_no_yes), 0x80, NULL, HFILL } }, { &hf_map_last, { "Last", "p_mul.last", FT_BOOLEAN, 8, TFS (&tfs_no_yes), 0x40, NULL, HFILL } }, { &hf_map_unused, { "MAP unused", "p_mul.unused", FT_UINT8, BASE_DEC, NULL, 0xC0, NULL, HFILL } }, { &hf_pdu_type, { "PDU Type", "p_mul.pdu_type", FT_UINT8, BASE_DEC, VALS (pdu_vals), 0x3F, NULL, HFILL } }, { &hf_pdu_type_value, { "PDU Type", "p_mul.pdu_type_value", FT_UINT8, BASE_DEC, VALS (pdu_vals), 0x3F, NULL, HFILL } }, { &hf_no_pdus, { "Total Number of PDUs", "p_mul.no_pdus", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_seq_no, { "Sequence Number of PDUs", "p_mul.seq_no", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_unused8, { "Unused", "p_mul.unused", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_unused16, { "Unused", "p_mul.unused", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_checksum, { "Checksum", "p_mul.checksum", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL } }, { &hf_checksum_good, { "Good", "p_mul.checksum_good", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "True: checksum matches packet content; False: doesn't match content or not checked", HFILL } }, { &hf_checksum_bad, { "Bad", "p_mul.checksum_bad", FT_BOOLEAN, BASE_NONE, NULL, 0x0, "True: checksum doesn't match packet content; False: matches content or not checked", HFILL } }, { &hf_source_id_ack, { "Source ID of Ack Sender", "p_mul.source_id_ack", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_source_id, { "Source ID", "p_mul.source_id", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_message_id, { "Message ID (MSID)", "p_mul.message_id", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_expiry_time, { "Expiry Time", "p_mul.expiry_time", FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0x0, NULL, HFILL } }, { &hf_mc_group, { "Multicast Group", "p_mul.mc_group", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ann_mc_group, { "Announced Multicast Group", "p_mul.ann_mc_group", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_fec_len, { "FEC Parameter Length", "p_mul.fec.length", FT_UINT8, BASE_DEC, NULL, 0x0, "Forward Error Correction Parameter Length", HFILL } }, { &hf_fec_id, { "FEC ID", "p_mul.fec.id", FT_UINT8, BASE_HEX, NULL, 0x0, "Forward Error Correction ID", HFILL } }, { &hf_fec_parameters, { "FEC Parameters", "p_mul.fec.parameters", FT_NONE, BASE_NONE, NULL, 0x0, "Forward Error Correction Parameters", HFILL } }, { &hf_count_of_dest, { "Count of Destination Entries", "p_mul.dest_count", FT_UINT16,BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_length_of_res, { "Length of Reserved Field", "p_mul.reserved_length",FT_UINT16,BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ack_count, { "Count of Ack Info Entries", "p_mul.ack_count", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_ack_entry, { "Ack Info Entry", "p_mul.ack_info_entry", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_ack_length, { "Length of Ack Info Entry", "p_mul.ack_length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_miss_seq_no, { "Missing Data PDU Seq Number", "p_mul.missing_seq_no", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_miss_seq_range, { "Missing Data PDU Seq Range", "p_mul.missing_seq_range", FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_miss_seq_range_from, { "Missing Data PDU Seq Range from", "p_mul.missing_seq_range.from", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_miss_seq_range_delimiter, { "Range Delimiter (always zero)", "p_mul.missing_seq_range.delimiter", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_miss_seq_range_to, { "Missing Data PDU Seq Range to", "p_mul.missing_seq_range.to", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_tot_miss_seq_no, { "Total Number of Missing Data PDU Sequence Numbers", "p_mul.no_missing_seq_no", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_timestamp_option, { "Timestamp", "p_mul.timestamp", FT_UINT64, BASE_DEC, NULL, 0x0, "Timestamp Option (in units of 100ms)", HFILL } }, { &hf_dest_entry, { "Destination Entry", "p_mul.dest_entry", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_dest_id, { "Destination ID", "p_mul.dest_id", FT_IPv4, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_msg_seq_no, { "Message Sequence Number", "p_mul.msg_seq_no", FT_UINT32, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_sym_key, { "Symmetric Key", "p_mul.sym_key", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_data_fragment, { "Fragment of Data", "p_mul.data_fragment", FT_NONE, BASE_NONE, NULL, 0x0, NULL, HFILL } }, /* Fragment entries */ { &hf_msg_fragments, { "Message fragments", "p_mul.fragments", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_msg_fragment, { "Message fragment", "p_mul.fragment", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_msg_fragment_overlap, { "Message fragment overlap", "p_mul.fragment.overlap", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_msg_fragment_overlap_conflicts, { "Message fragment overlapping with conflicting data", "p_mul.fragment.overlap.conflicts", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_msg_fragment_multiple_tails, { "Message has multiple tail fragments", "p_mul.fragment.multiple_tails", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_msg_fragment_too_long_fragment, { "Message fragment too long", "p_mul.fragment.too_long_fragment", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } }, { &hf_msg_fragment_error, { "Message defragmentation error", "p_mul.fragment.error", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_msg_fragment_count, { "Message fragment count", "p_mul.fragment.count", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_msg_reassembled_in, { "Reassembled in", "p_mul.reassembled.in", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } }, { &hf_msg_reassembled_length, { "Reassembled P_MUL length", "p_mul.reassembled.length", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } }, /* ** Ack matching / Resend */ { &hf_analysis_ack_time, { "Ack Time", "p_mul.analysis.ack_time", FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0, "The time between the Last PDU and the Ack", HFILL } }, { &hf_analysis_trans_time, { "Transfer Time", "p_mul.analysis.trans_time", FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0, "The time between the first Address PDU and the Ack", HFILL } }, { &hf_analysis_retrans_time, { "Retransmission Time", "p_mul.analysis.retrans_time", FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0, "The time between the last PDU and this PDU", HFILL } }, { &hf_analysis_total_retrans_time, { "Total Retransmission Time", "p_mul.analysis.total_retrans_time", FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0, "The time between the first PDU and this PDU", HFILL } }, { &hf_analysis_addr_pdu_time, { "Time since Address PDU", "p_mul.analysis.elapsed_time", FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0, "The time between the Address PDU and this PDU", HFILL } }, { &hf_analysis_prev_pdu_time, { "PDU Delay", "p_mul.analysis.pdu_delay", FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0, "The time between the last PDU and this PDU", HFILL } }, { &hf_analysis_last_pdu_num, { "Last Data PDU in", "p_mul.analysis.last_pdu_in", FT_FRAMENUM, BASE_NONE, NULL, 0x0, "The last Data PDU found in this frame", HFILL } }, { &hf_analysis_addr_pdu_num, { "Address PDU in", "p_mul.analysis.addr_pdu_in", FT_FRAMENUM, BASE_NONE, NULL, 0x0, "The Address PDU is found in this frame", HFILL } }, { &hf_analysis_acks_addr_pdu_num, { "This is an Ack to the Address PDU in", "p_mul.analysis.acks_addr_pdu_in", FT_FRAMENUM, BASE_NONE, FRAMENUM_TYPE(FT_FRAMENUM_ACK), 0x0, "The Address PDU is found in this frame", HFILL } }, { &hf_analysis_acks_acked_addr_pdu_num, { "This is an Ack-Ack to the Address PDU in", "p_mul.analysis.acks_acked_addr_pdu_in", FT_FRAMENUM, BASE_NONE, FRAMENUM_TYPE(FT_FRAMENUM_DUP_ACK), 0x0, "The Address PDU is found in this frame", HFILL } }, { &hf_analysis_prev_pdu_num, { "Previous PDU in", "p_mul.analysis.prev_pdu_in", FT_FRAMENUM, BASE_NONE, NULL, 0x0, "The previous PDU is found in this frame", HFILL } }, { &hf_analysis_ack_num, { "Ack PDU in", "p_mul.analysis.ack_in", FT_FRAMENUM, BASE_NONE, NULL, 0x0, "This packet has an Ack in this frame", HFILL } }, { &hf_analysis_ack_missing, { "Ack PDU missing", "p_mul.analysis.ack_missing", FT_NONE, BASE_NONE, NULL, 0x0, "The acknowledgement for this packet is missing", HFILL } }, { &hf_analysis_retrans_no, { "Retransmission #", "p_mul.analysis.retrans_no", FT_UINT32, BASE_DEC, NULL, 0x0, "Retransmission count", HFILL } }, { &hf_analysis_ack_dup_no, { "Duplicate ACK #", "p_mul.analysis.dup_ack_no", FT_UINT32, BASE_DEC, NULL, 0x0, "Duplicate Ack count", HFILL } }, { &hf_analysis_msg_resend_from, { "Retransmission of Message in", "p_mul.analysis.msg_first_in", FT_FRAMENUM, BASE_NONE, NULL, 0x0, "This Message was first sent in this frame", HFILL } }, { &hf_analysis_ack_resend_from, { "Retransmission of Ack in", "p_mul.analysis.ack_first_in", FT_FRAMENUM, BASE_NONE, NULL, 0x0, "This Ack was first sent in this frame", HFILL } }, { &hf_analysis_total_time, { "Total Time", "p_mul.analysis.total_time", FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0, "The time between the first and the last Address PDU", HFILL } }, }; static int *ett[] = { &ett_p_mul, &ett_pdu_type, &ett_dest_entry, &ett_ack_entry, &ett_range_entry, &ett_checksum, &ett_seq_analysis, &ett_ack_analysis, &ett_seq_ack_analysis, &ett_msg_fragment, &ett_msg_fragments }; static ei_register_info ei[] = { { &ei_address_pdu_missing, { "p_mul.analysis.addr_pdu_missing", PI_SEQUENCE, PI_NOTE, "Address PDU missing", EXPFILL }}, { &ei_analysis_ack_missing, { "p_mul.analysis.ack_missing.expert", PI_SEQUENCE, PI_NOTE, "Ack PDU missing", EXPFILL }}, { &ei_analysis_ack_dup_no, { "p_mul.analysis.dup_ack_no.expert", PI_SEQUENCE, PI_NOTE, "Dup ACK #", EXPFILL }}, { &ei_analysis_prev_pdu_missing, { "p_mul.analysis.prev_pdu_missing", PI_SEQUENCE, PI_NOTE, "Previous PDU missing", EXPFILL }}, { &ei_analysis_retrans_no, { "p_mul.analysis.retrans_no.expert", PI_SEQUENCE, PI_NOTE, "Retransmission #", EXPFILL }}, { &ei_message_discarded, { "p_mul.message_discarded", PI_RESPONSE_CODE, PI_NOTE, "Message discarded", EXPFILL }}, { &ei_checksum_bad, { "p_mul.checksum_bad.expert", PI_CHECKSUM, PI_WARN, "Bad checksum", EXPFILL }}, { &ei_ack_length, { "p_mul.ack_length.invalid", PI_MALFORMED, PI_WARN, "Invalid ack info length", EXPFILL }}, { &ei_miss_seq_range, { "p_mul.missing_seq_range.invalid", PI_UNDECODED, PI_WARN, "Invalid missing sequence range", EXPFILL }}, { &ei_miss_seq_no, { "p_mul.missing_seq_no.invalid", PI_UNDECODED, PI_WARN, "Invalid missing seq number", EXPFILL }}, { &ei_tot_miss_seq_no, { "p_mul.no_missing_seq_no.expert", PI_RESPONSE_CODE, PI_NOTE, "Missing seq numbers", EXPFILL }}, { &ei_illegal_seq_no, { "p_mul.seq_no.illegal", PI_PROTOCOL, PI_WARN, "Illegal seq number", EXPFILL }}, { &ei_length, { "p_mul.length.invalid", PI_MALFORMED, PI_WARN, "Incorrect length field", EXPFILL }}, { &ei_more_data, { "p_mul.more_data", PI_MALFORMED, PI_WARN, "More data in packet", EXPFILL }}, }; module_t *p_mul_module; expert_module_t* expert_p_mul; proto_p_mul = proto_register_protocol (PNAME, PSNAME, PFNAME); p_mul_handle = register_dissector(PFNAME, dissect_p_mul, proto_p_mul); proto_register_field_array (proto_p_mul, hf, array_length (hf)); proto_register_subtree_array (ett, array_length (ett)); expert_p_mul = expert_register_protocol(proto_p_mul); expert_register_field_array(expert_p_mul, ei, array_length(ei)); register_init_routine (&p_mul_init_routine); reassembly_table_register (&p_mul_reassembly_table, &addresses_reassembly_table_functions); p_mul_id_hash_table = wmem_map_new_autoreset(wmem_epan_scope(), wmem_file_scope(), p_mul_id_hash, p_mul_id_hash_equal); /* Register our configuration options */ p_mul_module = prefs_register_protocol (proto_p_mul, NULL); prefs_register_obsolete_preference (p_mul_module, "tport"); prefs_register_obsolete_preference (p_mul_module, "rport"); prefs_register_obsolete_preference (p_mul_module, "dport"); prefs_register_obsolete_preference (p_mul_module, "aport"); prefs_register_bool_preference (p_mul_module, "reassemble", "Reassemble fragmented P_Mul packets", "Reassemble fragmented P_Mul packets", &p_mul_reassemble); prefs_register_bool_preference (p_mul_module, "relative_msgid", "Use relative Message ID", "Make the P_Mul dissector use relative" " message id number instead of absolute" " ones", &use_relative_msgid); prefs_register_bool_preference (p_mul_module, "seq_ack_analysis", "SEQ/ACK Analysis", "Calculate sequence/acknowledgement analysis", &use_seq_ack_analysis); prefs_register_enum_preference (p_mul_module, "decode", "Decode Data PDU as", "Type of content in Data_PDU", &decode_option, decode_options, false); } void proto_reg_handoff_p_mul (void) { dissector_add_uint ("s5066sis.ctl.appid", S5066_CLIENT_S4406_ANNEX_E_TMI_1_P_MUL, p_mul_handle); dissector_add_uint_range_with_preference("udp.port", DEFAULT_P_MUL_PORT_RANGE, p_mul_handle); } /* * Editor modelines * * Local Variables: * c-basic-offset: 2 * tab-width: 8 * indent-tabs-mode: nil * End: * * ex: set shiftwidth=2 tabstop=8 expandtab: * :indentSize=2:tabSize=8:noTabs=true: */