/* packet-tpncp.c * Routines for Audiocodes TrunkPack Network Control Protocol (TPNCP) dissection * * Copyright (c) 2007 by Valery Sigalov * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * SPDX-License-Identifier: GPL-2.0-or-later */ /*---------------------------------------------------------------------------*/ #define G_LOG_DOMAIN "TPNCP" #include "config.h" #include #include #include #include #include #include #include #include #include #include "packet-tcp.h" /*---------------------------------------------------------------------------*/ #define BASE_TPNCP_PORT 2424 #define HA_PORT_TPNCP_TRUNKPACK 2442 #define TCP_PORT_TPNCP_TRUNKPACK BASE_TPNCP_PORT #define UDP_PORT_TPNCP_TRUNKPACK BASE_TPNCP_PORT #define TCP_PORT_TPNCP_HOST BASE_TPNCP_PORT #define UDP_PORT_TPNCP_HOST BASE_TPNCP_PORT #define MAX_TPNCP_DB_ENTRY_LEN 3000 #define MAX_TPNCP_DB_SIZE 5000 #define MAX_ENUMS_NUM 1000 #define MAX_ENUM_ENTRIES 1000 /*---------------------------------------------------------------------------*/ void proto_register_tpncp(void); void proto_reg_handoff_tpncp(void); /* The linked list for storing information about specific data fields. */ typedef struct tpncp_data_field_info { gchar *tpncp_data_field_name; gint tpncp_data_field_descr; gint tpncp_data_field_sign; gint tpncp_data_field_size; gint tpncp_data_field_array_dim; gint tpncp_data_field_is_ip_addr; struct tpncp_data_field_info *p_next; } tpncp_data_field_info; /*--------------------------------------------------------------------------- * Desegmentation of TPNCP over TCP */ static gboolean tpncp_desegment = TRUE; /* Database for storing information about all TPNCP events. * XXX: ToDo: allocate at runtime as needed*/ static tpncp_data_field_info tpncp_events_info_db[MAX_TPNCP_DB_SIZE]; /* Database for storing information about all TPNCP commands. * XXX: ToDo: allocate at runtime as needed*/ static tpncp_data_field_info tpncp_commands_info_db[MAX_TPNCP_DB_SIZE]; /* Global variables for bitfields representation. */ static gint bits[] = {0x1, 0x2, 0x4, 0x8, 0x10, 0x20, 0x40, 0x80}; /* TPNCP packet header fields. */ static gint proto_tpncp = -1; static gint hf_tpncp_version = -1; static gint hf_tpncp_length = -1; static gint hf_tpncp_seq_number = -1; static gint hf_tpncp_length_ext = -1; static gint hf_tpncp_reserved = -1; static gint hf_tpncp_command_id = -1; static gint hf_tpncp_event_id = -1; static gint hf_tpncp_cid = -1; static expert_field ei_tpncp_unknown_data = EI_INIT; /* TPNCP fields defining a subtree. */ static gint ett_tpncp = -1; static gint ett_tpncp_body = -1; static gboolean global_tpncp_load_db = FALSE; static dissector_handle_t tpncp_handle; /* XXX: ToDo: allocate at runtime as needed * The following allocates something on the order of 2M of static memory ! * Also: Runtime value_string_ext arrays should be used*/ static value_string tpncp_commands_id_vals[MAX_TPNCP_DB_SIZE]; static value_string tpncp_events_id_vals[MAX_TPNCP_DB_SIZE]; static value_string tpncp_enums_id_vals[MAX_ENUMS_NUM][MAX_ENUM_ENTRIES]; static gchar *tpncp_enums_name_vals[MAX_ENUMS_NUM]; static gint hf_size = 1; static gint hf_allocated = 0; static hf_register_info *hf = NULL; /*---------------------------------------------------------------------------*/ static void dissect_tpncp_data(guint data_id, packet_info *pinfo, tvbuff_t *tvb, proto_tree *ltree, gint *offset, tpncp_data_field_info *data_fields_info, guint encoding) { gint8 g_char; guint8 g_uchar; gint g_str_len, counter, bitshift, bitmask; tpncp_data_field_info *current_tpncp_data_field_info = NULL; gint bitindex = encoding == ENC_LITTLE_ENDIAN ? 7 : 0; current_tpncp_data_field_info = &data_fields_info[data_id]; while (current_tpncp_data_field_info) { switch (current_tpncp_data_field_info->tpncp_data_field_size) { case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8: /* add char array */ if ((g_str_len = current_tpncp_data_field_info->tpncp_data_field_array_dim)) { g_str_len = MIN(g_str_len, tvb_reported_length_remaining(tvb, *offset)); proto_tree_add_item(ltree, current_tpncp_data_field_info->tpncp_data_field_descr, tvb, *offset, g_str_len, ENC_NA | ENC_ASCII); (*offset) += g_str_len; } else { /* add single char */ g_uchar = tvb_get_guint8(tvb, *offset); /* bitfields */ if (current_tpncp_data_field_info->tpncp_data_field_size != 8) { for (counter = 0, bitmask = 0x0, bitshift = bitindex; counter < current_tpncp_data_field_info->tpncp_data_field_size; counter++) { bitmask |= bits[bitindex]; /* Bitmask of interesting bits. */ bitindex += encoding == ENC_LITTLE_ENDIAN ? -1 : 1; } g_uchar &= bitmask; g_uchar >>= bitshift; } if (current_tpncp_data_field_info->tpncp_data_field_sign || current_tpncp_data_field_info->tpncp_data_field_size != 8) { proto_tree_add_uint(ltree, current_tpncp_data_field_info->tpncp_data_field_descr, tvb, *offset, 1, g_uchar); } else { /* signed*/ g_char = (gint8) g_uchar; proto_tree_add_int(ltree, current_tpncp_data_field_info->tpncp_data_field_descr, tvb, *offset, 1, g_char); } if (((bitindex == 0 || bitindex == 8) && encoding == ENC_BIG_ENDIAN) || ((bitindex == -1 || bitindex == 7) && encoding == ENC_LITTLE_ENDIAN)) { (*offset)++; bitindex = encoding == ENC_LITTLE_ENDIAN ? 7 : 0; } } break; case 16: proto_tree_add_item(ltree, current_tpncp_data_field_info->tpncp_data_field_descr, tvb, *offset, 2, encoding); (*offset) += 2; break; case 32: proto_tree_add_item(ltree, current_tpncp_data_field_info->tpncp_data_field_descr, tvb, *offset, 4, encoding); (*offset) += 4; break; default: break; } current_tpncp_data_field_info = current_tpncp_data_field_info->p_next; if (tvb_reported_length_remaining(tvb, *offset) <= 0 || !current_tpncp_data_field_info) break; } if ((g_str_len = tvb_reported_length_remaining(tvb, *offset)) > 0) { expert_add_info_format(pinfo, ltree, &ei_tpncp_unknown_data, "TPNCP Unknown Data"); (*offset) += g_str_len; } } /*---------------------------------------------------------------------------*/ static int dissect_tpncp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_) { proto_item *item = NULL; proto_tree *tpncp_tree = NULL, *event_tree, *command_tree; gint offset = 0, cid = 0; guint id; guint seq_number, len, ver; guint len_ext, reserved; guint32 fullLength; guint encoding = tvb_get_ntohs(tvb, 8) == 0 ? ENC_BIG_ENDIAN : ENC_LITTLE_ENDIAN; col_set_str(pinfo->cinfo, COL_PROTOCOL, "TPNCP"); item = proto_tree_add_item(tree, proto_tpncp, tvb, 0, -1, ENC_NA); tpncp_tree = proto_item_add_subtree(item, ett_tpncp); proto_tree_add_item_ret_uint(tpncp_tree, hf_tpncp_version, tvb, 0, 2, encoding, &ver); proto_tree_add_item_ret_uint(tpncp_tree, hf_tpncp_length, tvb, 2, 2, encoding, &len); proto_tree_add_item_ret_uint(tpncp_tree, hf_tpncp_seq_number, tvb, 4, 2, encoding, &seq_number); proto_tree_add_item_ret_uint(tpncp_tree, hf_tpncp_length_ext, tvb, 6, 1, encoding, &len_ext); proto_tree_add_item_ret_uint(tpncp_tree, hf_tpncp_reserved, tvb, 7, 1, encoding, &reserved); fullLength = 0xffff * len_ext + len; id = tvb_get_guint32(tvb, 8, encoding); cid = tvb_get_gint32(tvb, 12, encoding); if (pinfo->srcport == UDP_PORT_TPNCP_TRUNKPACK || pinfo->srcport == HA_PORT_TPNCP_TRUNKPACK) { if (try_val_to_str(id, tpncp_events_id_vals)) { proto_tree_add_uint(tpncp_tree, hf_tpncp_event_id, tvb, 8, 4, id); proto_tree_add_int(tpncp_tree, hf_tpncp_cid, tvb, 12, 4, cid); offset += 16; if (tpncp_events_info_db[id].tpncp_data_field_size) { event_tree = proto_tree_add_subtree_format( tree, tvb, offset, -1, ett_tpncp_body, NULL, "TPNCP Event: %s (%d)", val_to_str_const(id, tpncp_events_id_vals, "Unknown"), id); dissect_tpncp_data(id, pinfo, tvb, event_tree, &offset, tpncp_events_info_db, encoding); } } } else if (try_val_to_str(id, tpncp_commands_id_vals)) { proto_tree_add_uint(tpncp_tree, hf_tpncp_command_id, tvb, 8, 4, id); offset += 12; if (tpncp_commands_info_db[id].tpncp_data_field_size) { command_tree = proto_tree_add_subtree_format( tree, tvb, offset, -1, ett_tpncp_body, NULL, "TPNCP Command: %s (%d)", val_to_str_const(id, tpncp_commands_id_vals, "Unknown"), id); dissect_tpncp_data(id, pinfo, tvb, command_tree, &offset, tpncp_commands_info_db, encoding); } } if (pinfo->srcport == UDP_PORT_TPNCP_TRUNKPACK || pinfo->srcport == HA_PORT_TPNCP_TRUNKPACK) { col_add_fstr(pinfo->cinfo, COL_INFO, "EvID=%s(%d), SeqNo=%d, CID=%d, Len=%d, Ver=%d", val_to_str_const(id, tpncp_events_id_vals, "Unknown"), id, seq_number, cid, fullLength, ver); } else { col_add_fstr(pinfo->cinfo, COL_INFO, "CmdID=%s(%d), SeqNo=%d, CID=%d, Len=%d, Ver=%d", val_to_str_const(id, tpncp_commands_id_vals, "Unknown"), id, seq_number, cid, fullLength, ver); } return tvb_reported_length(tvb); } /*---------------------------------------------------------------------------*/ static guint get_tpncp_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset, void *data _U_) { guint32 plen; /* Get the length of the TPNCP packet. */ plen = tvb_get_ntohs(tvb, offset + 2) + 0xffff * tvb_get_guint8(tvb, offset + 6); /* Length does not include the version+length field. */ plen += 4; return plen; } /*---------------------------------------------------------------------------*/ static int dissect_tpncp_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data) { if (pinfo->can_desegment) /* If desegmentation is enabled (TCP preferences) use the desegmentation API. */ tcp_dissect_pdus(tvb, pinfo, tree, tpncp_desegment, 4, get_tpncp_pdu_len, dissect_tpncp, data); else /* Otherwise use the regular dissector (might not give correct dissection). */ dissect_tpncp(tvb, pinfo, tree, data); return tvb_reported_length(tvb); } /*---------------------------------------------------------------------------*/ static gboolean fgetline(gchar *buffer, int size, FILE *file) { if (!fgets(buffer, size, file)) return 0; size_t last = strlen(buffer); if (buffer[last - 1] == '\n') buffer[last - 1] = 0; return 1; } static gint fill_tpncp_id_vals(value_string string[], FILE *file) { gint i = 0, tpncp_id = 0; gchar *tpncp_name, *line_in_file; if (file == NULL) return -1; line_in_file = (gchar *) g_malloc(MAX_TPNCP_DB_ENTRY_LEN); line_in_file[0] = 0; tpncp_name = (gchar *) g_malloc(MAX_TPNCP_DB_ENTRY_LEN); tpncp_name[0] = 0; while (fgetline(line_in_file, MAX_TPNCP_DB_ENTRY_LEN, file) && !feof(file)) { if (!strncmp(line_in_file, "#####", 5)) break; if (sscanf(line_in_file, "%255s %d", tpncp_name, &tpncp_id) == 2) { string[i].strptr = wmem_strdup(wmem_epan_scope(), tpncp_name); string[i].value = (guint32) tpncp_id; if (i >= MAX_TPNCP_DB_SIZE - 1) break; i++; } } g_free(line_in_file); g_free(tpncp_name); return 0; } /*---------------------------------------------------------------------------*/ static gint fill_enums_id_vals(FILE *file) { gint i = 0, enum_id = 0, enum_val = 0; gboolean first_entry = TRUE; gchar *line_in_file = NULL, *enum_name = NULL, *enum_type = NULL, *enum_str = NULL; line_in_file = (gchar *) g_malloc(MAX_TPNCP_DB_ENTRY_LEN); enum_name = (gchar *) g_malloc(MAX_TPNCP_DB_ENTRY_LEN); enum_type = (gchar *) g_malloc(MAX_TPNCP_DB_ENTRY_LEN); enum_str = (gchar *) g_malloc(MAX_TPNCP_DB_ENTRY_LEN); *line_in_file = *enum_name = *enum_type = *enum_str = 0; while (fgetline(line_in_file, MAX_TPNCP_DB_ENTRY_LEN, file)) { if (!strncmp(line_in_file, "#####", 5)) break; if (sscanf(line_in_file, "%255s %255s %d", enum_name, enum_str, &enum_id) == 3) { if (strcmp(enum_type, enum_name)) { if (!first_entry) { tpncp_enums_id_vals[enum_val][i].strptr = NULL; tpncp_enums_id_vals[enum_val][i].value = 0; if (enum_val < (MAX_ENUMS_NUM - 2)) { enum_val++; i = 0; } else { break; } } else { first_entry = FALSE; } tpncp_enums_name_vals[enum_val] = wmem_strdup(wmem_epan_scope(), enum_name); g_strlcpy(enum_type, enum_name, MAX_TPNCP_DB_ENTRY_LEN); } tpncp_enums_id_vals[enum_val][i].strptr = wmem_strdup(wmem_epan_scope(), enum_str); tpncp_enums_id_vals[enum_val][i].value = enum_id; if (i < (MAX_ENUM_ENTRIES - 1)) { i++; } else { break; } } } tpncp_enums_name_vals[enum_val + 1] = NULL; g_free(line_in_file); g_free(enum_name); g_free(enum_type); g_free(enum_str); return 0; } /*---------------------------------------------------------------------------*/ static gint get_enum_name_val(const gchar *enum_name) { gint enum_val = 0; while (tpncp_enums_name_vals[enum_val]) { if (!strcmp(enum_name, tpncp_enums_name_vals[enum_val])) return enum_val; enum_val++; } return -1; } /*---------------------------------------------------------------------------*/ static gint init_tpncp_data_fields_info(tpncp_data_field_info *data_fields_info, FILE *file) { static gboolean was_registered = FALSE; gchar tpncp_db_entry[MAX_TPNCP_DB_ENTRY_LEN]; gchar entry_copy[MAX_TPNCP_DB_ENTRY_LEN]; const gchar *tpncp_data_field_name = NULL, *tmp = NULL; gint enum_val, data_id, current_data_id = -1, tpncp_data_field_sign, tpncp_data_field_size, tpncp_data_field_array_dim, tpncp_data_field_is_ip_addr; guint idx; tpncp_data_field_info *current_tpncp_data_field_info = NULL; hf_register_info hf_entr; gboolean registered_struct_ids[MAX_TPNCP_DB_SIZE]; static hf_register_info hf_tpncp[] = { { &hf_tpncp_version, { "Version", "tpncp.version", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_tpncp_length, { "Length", "tpncp.length", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_tpncp_seq_number, { "Sequence number", "tpncp.seq_number", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_tpncp_length_ext, { "Length Extension", "tpncp.lengthextention", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_tpncp_reserved, { "Reserved", "tpncp.reserved", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL } }, { &hf_tpncp_command_id, { "Command ID", "tpncp.command_id", FT_UINT32, BASE_DEC, VALS(tpncp_commands_id_vals), 0x0, NULL, HFILL } }, { &hf_tpncp_event_id, { "Event ID", "tpncp.event_id", FT_UINT32, BASE_DEC, VALS(tpncp_events_id_vals), 0x0, NULL, HFILL } }, { &hf_tpncp_cid, { "Channel ID", "tpncp.channel_id", FT_INT32, BASE_DEC, NULL, 0x0, NULL, HFILL } } }; memset(registered_struct_ids, 0, sizeof (registered_struct_ids)); /* Register common fields of hf_register_info structure. */ hf_entr.hfinfo.type = FT_NONE; hf_entr.hfinfo.strings = NULL; hf_entr.hfinfo.bitmask = 0x0; hf_entr.hfinfo.blurb = NULL; HFILL_INIT(hf_entr); if (!was_registered) { void *newbuf; /* Register non-standard data should be done only once. */ hf_allocated = hf_size + (int) array_length(hf_tpncp) - 1; newbuf = wmem_realloc(wmem_epan_scope(), hf, hf_allocated * sizeof (hf_register_info)); if (!newbuf) return -1; hf = (hf_register_info *) newbuf; for (idx = 0; idx < array_length(hf_tpncp); idx++) { memcpy(hf + (hf_size - 1), hf_tpncp + idx, sizeof (hf_register_info)); hf_size++; } was_registered = TRUE; } else hf_size++; /* Register standard data. */ while (fgetline(tpncp_db_entry, MAX_TPNCP_DB_ENTRY_LEN, file)) { g_snprintf(entry_copy, MAX_TPNCP_DB_ENTRY_LEN, "%s", tpncp_db_entry); if (!strncmp(tpncp_db_entry, "#####", 5)) { hf_size--; break; } /* Default to decimal display type */ hf_entr.hfinfo.display = BASE_DEC; if ((tmp = strtok(tpncp_db_entry, " ")) == NULL) { report_failure( "ERROR! Badly formed data base entry: %s - corresponding field's registration is skipped.", entry_copy); continue; } data_id = (gint) g_ascii_strtoll(tmp, NULL, 10); if ((tpncp_data_field_name = strtok(NULL, " ")) == NULL) { report_failure( "ERROR! Badly formed data base entry: %s - corresponding field's registration is skipped.", entry_copy); continue; } /* We happen to have a line without a name (57 0 32 0 0 primitive). Consider unnamed. */ if (g_ascii_isdigit(*tpncp_data_field_name)) { tmp = tpncp_data_field_name; tpncp_data_field_name = "unnamed"; } else { if ((tmp = strtok(NULL, " ")) == NULL) { report_failure( "ERROR! Badly formed data base entry: %s - corresponding field's registration is skipped.", entry_copy); continue; } } tpncp_data_field_sign = (gint) g_ascii_strtoll(tmp, NULL, 10); if ((tmp = strtok(NULL, " ")) == NULL) { report_failure( "ERROR! Badly formed data base entry: %s - corresponding field's registration is skipped.", entry_copy); continue; } tpncp_data_field_size = (gint) g_ascii_strtoll(tmp, NULL, 10); if ((tmp = strtok(NULL, " ")) == NULL) { report_failure( "ERROR! Badly formed data base entry: %s - corresponding field's registration is skipped.", entry_copy); continue; } tpncp_data_field_array_dim = (gint) g_ascii_strtoll(tmp, NULL, 10); if ((tmp = strtok(NULL, " ")) == NULL) { report_failure( "ERROR! Badly formed data base entry: %s - corresponding field's registration is skipped.", entry_copy); continue; } tpncp_data_field_is_ip_addr = tpncp_data_field_sign && g_ascii_strtoll(tmp, NULL, 10); if ((tmp = strtok(NULL, "\n")) == NULL) { report_failure( "ERROR! Badly formed data base entry: %s - corresponding field's registration is skipped.", entry_copy); continue; } if (current_data_id != data_id) { /* new data */ if (registered_struct_ids[data_id] == TRUE) { report_failure( "ERROR! The data_id %d already registered. Cannot register two identical events/command", data_id); continue; } registered_struct_ids[data_id] = TRUE; current_tpncp_data_field_info = &data_fields_info[data_id]; current_data_id = data_id; } else { current_tpncp_data_field_info->p_next = (tpncp_data_field_info *) wmem_alloc( wmem_epan_scope(), sizeof (tpncp_data_field_info)); if (!current_tpncp_data_field_info->p_next) return (-1); current_tpncp_data_field_info = current_tpncp_data_field_info->p_next; current_tpncp_data_field_info->p_next = NULL; } /* Register specific fields of hf_register_info struture. */ if (strcmp(tmp, "primitive")) { enum_val = get_enum_name_val(tmp); if (enum_val == -1) hf_entr.hfinfo.strings = NULL; else hf_entr.hfinfo.strings = VALS(tpncp_enums_id_vals[enum_val]); } else { hf_entr.hfinfo.strings = NULL; } current_tpncp_data_field_info->tpncp_data_field_descr = -1; hf_entr.p_id = ¤t_tpncp_data_field_info->tpncp_data_field_descr; current_tpncp_data_field_info->tpncp_data_field_name = wmem_strdup_printf(wmem_epan_scope(), "tpncp.%s", tpncp_data_field_name); hf_entr.hfinfo.name = current_tpncp_data_field_info->tpncp_data_field_name; hf_entr.hfinfo.abbrev = current_tpncp_data_field_info->tpncp_data_field_name; switch (tpncp_data_field_size) { case 1: case 2: case 3: case 4: case 5: case 6: case 7: case 8: if (tpncp_data_field_array_dim) { hf_entr.hfinfo.type = FT_STRING; hf_entr.hfinfo.display = BASE_NONE; } else { hf_entr.hfinfo.type = (tpncp_data_field_sign) ? FT_UINT8 : FT_INT8; } break; case 16: hf_entr.hfinfo.type = (tpncp_data_field_sign) ? FT_UINT16 : FT_INT16; break; case 32: if (tpncp_data_field_is_ip_addr) { hf_entr.hfinfo.display = BASE_NONE; hf_entr.hfinfo.type = FT_IPv4; } else { hf_entr.hfinfo.type = (tpncp_data_field_sign) ? FT_UINT32 : FT_INT32; } break; default: break; } /* Register initialized hf_register_info in global database. */ if (hf_size > hf_allocated) { void *newbuf; hf_allocated += 1024; newbuf = wmem_realloc(wmem_epan_scope(), hf, hf_allocated * sizeof (hf_register_info)); if (!newbuf) return -1; hf = (hf_register_info *) newbuf; } memcpy(hf + hf_size - 1, &hf_entr, sizeof (hf_register_info)); hf_size++; current_tpncp_data_field_info->tpncp_data_field_sign = tpncp_data_field_sign; current_tpncp_data_field_info->tpncp_data_field_size = tpncp_data_field_size; current_tpncp_data_field_info->tpncp_data_field_array_dim = tpncp_data_field_array_dim; current_tpncp_data_field_info->tpncp_data_field_is_ip_addr = tpncp_data_field_is_ip_addr; } return 0; } /*---------------------------------------------------------------------------*/ static gint init_tpncp_db(void) { gchar tpncp_dat_file_path[MAX_TPNCP_DB_ENTRY_LEN]; FILE *file; g_snprintf(tpncp_dat_file_path, MAX_TPNCP_DB_ENTRY_LEN, "%s" G_DIR_SEPARATOR_S "tpncp" G_DIR_SEPARATOR_S "tpncp.dat", get_datafile_dir()); /* Open file with TPNCP data. */ if ((file = ws_fopen(tpncp_dat_file_path, "r")) == NULL) return (-1); fill_tpncp_id_vals(tpncp_events_id_vals, file); fill_tpncp_id_vals(tpncp_commands_id_vals, file); fill_enums_id_vals(file); init_tpncp_data_fields_info(tpncp_events_info_db, file); init_tpncp_data_fields_info(tpncp_commands_info_db, file); fclose(file); return 0; } /*---------------------------------------------------------------------------*/ void proto_reg_handoff_tpncp(void) { dissector_handle_t tpncp_udp_handle, tpncp_tcp_handle; gint idx; static gboolean initialized = FALSE; if (proto_tpncp == -1) return; /* If we weren't able to load the database (and thus the hf_ entries) * do not attach to any ports (if we did then we'd get a "dissector bug" * assertions every time a packet is handed to us and we tried to use the * hf_ entry). */ if (!global_tpncp_load_db) return; if (hf_allocated == 0 && init_tpncp_db() == -1) { report_failure("tpncp: Could not load tpncp.dat file, tpncp dissector will not work"); return; } tpncp_udp_handle = create_dissector_handle(dissect_tpncp, proto_tpncp); tpncp_tcp_handle = create_dissector_handle(dissect_tpncp_tcp, proto_tpncp); dissector_add_uint_with_preference("udp.port", UDP_PORT_TPNCP_TRUNKPACK, tpncp_udp_handle); dissector_add_uint_with_preference("tcp.port", TCP_PORT_TPNCP_TRUNKPACK, tpncp_tcp_handle); if (initialized) return; /* Rather than duplicating large quantities of code from * proto_register_field_array() and friends to sanitize the tpncp.dat file * when we read it, just catch any exceptions we get while registering and * take them as a hint that the file is corrupt. Then move on, so that at * least the rest of the protocol dissectors will still work. */ TRY { /* The function proto_register_field_array does not work with dynamic * arrays, so pass dynamic array elements one-by-one in the loop. */ for (idx = 0; idx < hf_size; idx++) proto_register_field_array(proto_tpncp, &hf[idx], 1); } CATCH_ALL { report_failure("Corrupt tpncp.dat file, tpncp dissector will not work."); } ENDTRY; initialized = TRUE; } /*---------------------------------------------------------------------------*/ void proto_register_tpncp(void) { module_t *tpncp_module; expert_module_t* expert_tpncp; static gint *ett[] = { &ett_tpncp, &ett_tpncp_body }; static ei_register_info ei[] = { { &ei_tpncp_unknown_data, { "tpncp.unknown_data", PI_UNDECODED, PI_WARN, "Unknown data", EXPFILL } }, }; /* this dissector reads hf entries from a database * a boolean preference defines whether the database is loaded or not * we initialize the hf array in the handoff function when we have * access to the preference's value */ proto_tpncp = proto_register_protocol("AudioCodes TPNCP (TrunkPack Network Control Protocol)", "TPNCP", "tpncp"); tpncp_handle = register_dissector("tpncp", dissect_tpncp, proto_tpncp); tpncp_module = prefs_register_protocol(proto_tpncp, proto_reg_handoff_tpncp); proto_register_subtree_array(ett, array_length(ett)); expert_tpncp = expert_register_protocol(proto_tpncp); expert_register_field_array(expert_tpncp, ei, array_length(ei)); /* See https://bugs.wireshark.org/bugzilla/show_bug.cgi?id=9569 for some discussion on this as well */ prefs_register_bool_preference(tpncp_module, "load_db", "Whether to load DB or not; if DB not loaded dissector is passive", "Whether to load the Database or not; not loading the DB" " disables the protocol; Wireshark has to be restarted for the" " setting to take effect.", &global_tpncp_load_db); } /* * Editor modelines * * Local Variables: * c-basic-offset: 4 * tab-width: 8 * indent-tabs-mode: nil * End: * * ex: set shiftwidth=4 tabstop=8 expandtab: * :indentSize=4:tabSize=8:noTabs=true: */