/* Do not modify this file. Changes will be overwritten. */ /* Generated automatically by the ASN.1 to Wireshark dissector compiler */ /* packet-t38.c */ /* asn2wrs.py -p t38 -c ./t38.cnf -s ./packet-t38-template -D . -O ../.. T38_2002.asn */ /* Input file: packet-t38-template.c */ #line 1 "./asn1/t38/packet-t38-template.c" /* packet-t38.c * Routines for T.38 packet dissection * 2003 Hans Viens * 2004 Alejandro Vaquero, add support Conversations for SDP * 2006 Alejandro Vaquero, add T30 reassemble and dissection * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ /* Depending on what ASN.1 specification is used you may have to change * the preference setting regarding Pre-Corrigendum ASN.1 specification: * http://www.itu.int/ITU-T/asn1/database/itu-t/t/t38/1998/T38.html (Pre-Corrigendum=TRUE) * http://www.itu.int/ITU-T/asn1/database/itu-t/t/t38/2003/T38(1998).html (Pre-Corrigendum=TRUE) * * http://www.itu.int/ITU-T/asn1/database/itu-t/t/t38/2003/T38(2002).html (Pre-Corrigendum=FALSE) * http://www.itu.int/ITU-T/asn1/database/itu-t/t/t38/2002/t38.html (Pre-Corrigendum=FALSE) * http://www.itu.int/ITU-T/asn1/database/itu-t/t/t38/2002-Amd1/T38.html (Pre-Corrigendum=FALSE) */ /* TO DO: * - TCP desegmentation is currently not supported for T.38 IFP directly over TCP. * - H.245 dissectors should be updated to start conversations for T.38 similar to RTP. * - Sometimes the last octet is not high-lighted when selecting something in the tree. Bug in PER dissector? * - Add support for RTP payload audio/t38 (draft-jones-avt-audio-t38-03.txt), i.e. T38 in RTP packets. */ #include "config.h" #include #include #include #include #include #include #include #include #include #include #include "packet-t38.h" #include "packet-per.h" #include "packet-tpkt.h" void proto_register_t38(void); static int t38_tap = -1; /* dissect using the Pre Corrigendum T.38 ASN.1 specification (1998) */ static gboolean use_pre_corrigendum_asn1_specification = TRUE; /* dissect packets that looks like RTP version 2 packets as RTP */ /* instead of as T.38. This may result in that some T.38 UPTL */ /* packets with sequence number values higher than 32767 may be */ /* shown as RTP packets. */ static gboolean dissect_possible_rtpv2_packets_as_rtp = FALSE; /* Reassembly of T.38 PDUs over TPKT over TCP */ static gboolean t38_tpkt_reassembly = TRUE; /* Preference setting whether TPKT header is used when sending T.38 over TCP. * The default setting is Maybe where the dissector will look on the first * bytes to try to determine whether TPKT header is used or not. This may not * work so well in some cases. You may want to change the setting to Always or * Newer. */ #define T38_TPKT_NEVER 0 /* Assume that there is never a TPKT header */ #define T38_TPKT_ALWAYS 1 /* Assume that there is always a TPKT header */ #define T38_TPKT_MAYBE 2 /* Assume TPKT if first octets are 03-00-xx-xx */ static gint t38_tpkt_usage = T38_TPKT_MAYBE; static const enum_val_t t38_tpkt_options[] = { {"never", "Never", T38_TPKT_NEVER}, {"always", "Always", T38_TPKT_ALWAYS}, {"maybe", "Maybe", T38_TPKT_MAYBE}, {NULL, NULL, -1} }; /* T38 */ static dissector_handle_t t38_udp_handle; static dissector_handle_t t38_tcp_handle; static dissector_handle_t t38_tcp_pdu_handle; static dissector_handle_t rtp_handle; static dissector_handle_t t30_hdlc_handle; static dissector_handle_t data_handle; static gint32 Type_of_msg_value; static guint32 Data_Field_field_type_value; static guint32 Data_value; static guint32 T30ind_value; static guint32 Data_Field_item_num; static int proto_t38 = -1; /*--- Included file: packet-t38-hf.c ---*/ #line 1 "./asn1/t38/packet-t38-hf.c" static int hf_t38_IFPPacket_PDU = -1; /* IFPPacket */ static int hf_t38_UDPTLPacket_PDU = -1; /* UDPTLPacket */ static int hf_t38_type_of_msg = -1; /* Type_of_msg */ static int hf_t38_data_field = -1; /* Data_Field */ static int hf_t38_t30_indicator = -1; /* T30_indicator */ static int hf_t38_t30_data = -1; /* T30_data */ static int hf_t38_Data_Field_item = -1; /* Data_Field_item */ static int hf_t38_field_type = -1; /* T_field_type */ static int hf_t38_field_data = -1; /* T_field_data */ static int hf_t38_seq_number = -1; /* T_seq_number */ static int hf_t38_primary_ifp_packet = -1; /* T_primary_ifp_packet */ static int hf_t38_error_recovery = -1; /* T_error_recovery */ static int hf_t38_secondary_ifp_packets = -1; /* T_secondary_ifp_packets */ static int hf_t38_secondary_ifp_packets_item = -1; /* OpenType_IFPPacket */ static int hf_t38_fec_info = -1; /* T_fec_info */ static int hf_t38_fec_npackets = -1; /* INTEGER */ static int hf_t38_fec_data = -1; /* T_fec_data */ static int hf_t38_fec_data_item = -1; /* OCTET_STRING */ /*--- End of included file: packet-t38-hf.c ---*/ #line 115 "./asn1/t38/packet-t38-template.c" /* T38 setup fields */ static int hf_t38_setup = -1; static int hf_t38_setup_frame = -1; static int hf_t38_setup_method = -1; /* T38 Data reassemble fields */ static int hf_t38_fragments = -1; static int hf_t38_fragment = -1; static int hf_t38_fragment_overlap = -1; static int hf_t38_fragment_overlap_conflicts = -1; static int hf_t38_fragment_multiple_tails = -1; static int hf_t38_fragment_too_long_fragment = -1; static int hf_t38_fragment_error = -1; static int hf_t38_fragment_count = -1; static int hf_t38_reassembled_in = -1; static int hf_t38_reassembled_length = -1; static gint ett_t38 = -1; /*--- Included file: packet-t38-ett.c ---*/ #line 1 "./asn1/t38/packet-t38-ett.c" static gint ett_t38_IFPPacket = -1; static gint ett_t38_Type_of_msg = -1; static gint ett_t38_Data_Field = -1; static gint ett_t38_Data_Field_item = -1; static gint ett_t38_UDPTLPacket = -1; static gint ett_t38_T_error_recovery = -1; static gint ett_t38_T_secondary_ifp_packets = -1; static gint ett_t38_T_fec_info = -1; static gint ett_t38_T_fec_data = -1; /*--- End of included file: packet-t38-ett.c ---*/ #line 135 "./asn1/t38/packet-t38-template.c" static gint ett_t38_setup = -1; static gint ett_data_fragment = -1; static gint ett_data_fragments = -1; static expert_field ei_t38_malformed = EI_INIT; static gboolean primary_part = TRUE; static guint32 seq_number = 0; /* Tables for reassembly of Data fragments. */ static reassembly_table data_reassembly_table; static const fragment_items data_frag_items = { /* Fragment subtrees */ &ett_data_fragment, &ett_data_fragments, /* Fragment fields */ &hf_t38_fragments, &hf_t38_fragment, &hf_t38_fragment_overlap, &hf_t38_fragment_overlap_conflicts, &hf_t38_fragment_multiple_tails, &hf_t38_fragment_too_long_fragment, &hf_t38_fragment_error, &hf_t38_fragment_count, /* Reassembled in field */ &hf_t38_reassembled_in, /* Reassembled length field */ &hf_t38_reassembled_length, /* Reassembled data field */ NULL, /* Tag */ "Data fragments" }; typedef struct _fragment_key { address src; address dst; guint32 id; } fragment_key; static conversation_t *p_conv= NULL; static t38_conv *p_t38_conv = NULL; static t38_conv *p_t38_packet_conv = NULL; static t38_conv_info *p_t38_conv_info = NULL; static t38_conv_info *p_t38_packet_conv_info = NULL; /* RTP Version is the first 2 bits of the first octet in the UDP payload*/ #define RTP_VERSION(octet) ((octet) >> 6) void proto_reg_handoff_t38(void); static void show_setup_info(tvbuff_t *tvb, proto_tree *tree, t38_conv *p_t38_conv); /* Preferences bool to control whether or not setup info should be shown */ static gboolean global_t38_show_setup_info = TRUE; /* Can tap up to 4 T38 packets within same packet */ /* We only tap the primary part, not the redundancy */ #define MAX_T38_MESSAGES_IN_PACKET 4 static t38_packet_info t38_info_arr[MAX_T38_MESSAGES_IN_PACKET]; static int t38_info_current=0; static t38_packet_info *t38_info=NULL; static void t38_defragment_init(void) { /* Init reassembly table */ reassembly_table_init(&data_reassembly_table, &addresses_reassembly_table_functions); } static void t38_defragment_cleanup(void) { reassembly_table_destroy(&data_reassembly_table); } /* Set up an T38 conversation */ void t38_add_address(packet_info *pinfo, address *addr, int port, int other_port, const gchar *setup_method, guint32 setup_frame_number) { address null_addr; conversation_t* p_conversation; t38_conv* p_conversation_data = NULL; /* * If this isn't the first time this packet has been processed, * we've already done this work, so we don't need to do it * again. */ if ((pinfo->fd->flags.visited) || (t38_udp_handle == NULL)) { return; } clear_address(&null_addr); /* * Check if the ip address and port combination is not * already registered as a conversation. */ p_conversation = find_conversation( setup_frame_number, addr, &null_addr, PT_UDP, port, other_port, NO_ADDR_B | (!other_port ? NO_PORT_B : 0)); /* * If not, create a new conversation. */ if ( !p_conversation || p_conversation->setup_frame != setup_frame_number) { p_conversation = conversation_new( setup_frame_number, addr, &null_addr, PT_UDP, (guint32)port, (guint32)other_port, NO_ADDR2 | (!other_port ? NO_PORT2 : 0)); } /* Set dissector */ conversation_set_dissector(p_conversation, t38_udp_handle); /* * Check if the conversation has data associated with it. */ p_conversation_data = (t38_conv*)conversation_get_proto_data(p_conversation, proto_t38); /* * If not, add a new data item. */ if ( ! p_conversation_data ) { /* Create conversation data */ p_conversation_data = wmem_new(wmem_file_scope(), t38_conv); conversation_add_proto_data(p_conversation, proto_t38, p_conversation_data); } /* * Update the conversation data. */ g_strlcpy(p_conversation_data->setup_method, setup_method, MAX_T38_SETUP_METHOD_SIZE); p_conversation_data->setup_frame_number = setup_frame_number; p_conversation_data->src_t38_info.reass_ID = 0; p_conversation_data->src_t38_info.reass_start_seqnum = -1; p_conversation_data->src_t38_info.reass_data_type = 0; p_conversation_data->src_t38_info.last_seqnum = -1; p_conversation_data->src_t38_info.packet_lost = 0; p_conversation_data->src_t38_info.burst_lost = 0; p_conversation_data->src_t38_info.time_first_t4_data = 0; p_conversation_data->src_t38_info.additional_hdlc_data_field_counter = 0; p_conversation_data->src_t38_info.seqnum_prev_data_field = -1; p_conversation_data->dst_t38_info.reass_ID = 0; p_conversation_data->dst_t38_info.reass_start_seqnum = -1; p_conversation_data->dst_t38_info.reass_data_type = 0; p_conversation_data->dst_t38_info.last_seqnum = -1; p_conversation_data->dst_t38_info.packet_lost = 0; p_conversation_data->dst_t38_info.burst_lost = 0; p_conversation_data->dst_t38_info.time_first_t4_data = 0; p_conversation_data->dst_t38_info.additional_hdlc_data_field_counter = 0; p_conversation_data->dst_t38_info.seqnum_prev_data_field = -1; } static fragment_head * force_reassemble_seq(reassembly_table *table, packet_info *pinfo, guint32 id) { fragment_head *fd_head; fragment_item *fd_i; fragment_item *last_fd; guint32 dfpos, size, packet_lost, burst_lost, seq_num; guint8 *data; fd_head = fragment_get(table, pinfo, id, NULL); /* have we already seen this frame ?*/ if (pinfo->fd->flags.visited) { if (fd_head != NULL && fd_head->flags & FD_DEFRAGMENTED) { return fd_head; } else { return NULL; } } if (fd_head==NULL){ /* we must have it to continue */ return NULL; } /* check for packet lost and count the burst of packet lost */ packet_lost = 0; burst_lost = 0; seq_num = 0; for(fd_i=fd_head->next;fd_i;fd_i=fd_i->next) { if (seq_num != fd_i->offset) { packet_lost += fd_i->offset - seq_num; if ( (fd_i->offset - seq_num) > burst_lost ) { burst_lost = fd_i->offset - seq_num; } } seq_num = fd_i->offset + 1; } /* we have received an entire packet, defragment it and * free all fragments */ size=0; last_fd=NULL; for(fd_i=fd_head->next;fd_i;fd_i=fd_i->next) { if(!last_fd || last_fd->offset!=fd_i->offset){ size+=fd_i->len; } last_fd=fd_i; } data = (guint8 *) g_malloc(size); fd_head->tvb_data = tvb_new_real_data(data, size, size); fd_head->len = size; /* record size for caller */ /* add all data fragments */ dfpos = 0; last_fd=NULL; for (fd_i=fd_head->next;fd_i && fd_i->len + dfpos <= size;fd_i=fd_i->next) { if (fd_i->len) { if(!last_fd || last_fd->offset!=fd_i->offset){ tvb_memcpy(fd_i->tvb_data, data+dfpos, 0, fd_i->len); dfpos += fd_i->len; } else { /* duplicate/retransmission/overlap */ fd_i->flags |= FD_OVERLAP; fd_head->flags |= FD_OVERLAP; if( (last_fd->len!=fd_i->len) || tvb_memeql(last_fd->tvb_data, 0, tvb_get_ptr(fd_i->tvb_data, 0, last_fd->len), last_fd->len) ){ fd_i->flags |= FD_OVERLAPCONFLICT; fd_head->flags |= FD_OVERLAPCONFLICT; } } } last_fd=fd_i; } /* we have defragmented the pdu, now free all fragments*/ for (fd_i=fd_head->next;fd_i;fd_i=fd_i->next) { if(fd_i->tvb_data){ tvb_free(fd_i->tvb_data); fd_i->tvb_data=NULL; } } /* mark this packet as defragmented */ fd_head->flags |= FD_DEFRAGMENTED; fd_head->reassembled_in=pinfo->num; col_append_fstr(pinfo->cinfo, COL_INFO, " (t4-data Reassembled: %d pack lost, %d pack burst lost)", packet_lost, burst_lost); p_t38_packet_conv_info->packet_lost = packet_lost; p_t38_packet_conv_info->burst_lost = burst_lost; return fd_head; } /* T38 Routines */ /*--- Included file: packet-t38-fn.c ---*/ #line 1 "./asn1/t38/packet-t38-fn.c" const value_string t38_T30_indicator_vals[] = { { 0, "no-signal" }, { 1, "cng" }, { 2, "ced" }, { 3, "v21-preamble" }, { 4, "v27-2400-training" }, { 5, "v27-4800-training" }, { 6, "v29-7200-training" }, { 7, "v29-9600-training" }, { 8, "v17-7200-short-training" }, { 9, "v17-7200-long-training" }, { 10, "v17-9600-short-training" }, { 11, "v17-9600-long-training" }, { 12, "v17-12000-short-training" }, { 13, "v17-12000-long-training" }, { 14, "v17-14400-short-training" }, { 15, "v17-14400-long-training" }, { 16, "v8-ansam" }, { 17, "v8-signal" }, { 18, "v34-cntl-channel-1200" }, { 19, "v34-pri-channel" }, { 20, "v34-CC-retrain" }, { 21, "v33-12000-training" }, { 22, "v33-14400-training" }, { 0, NULL } }; static int dissect_t38_T30_indicator(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_enumerated(tvb, offset, actx, tree, hf_index, 16, &T30ind_value, TRUE, 7, NULL); #line 29 "./asn1/t38/t38.cnf" if (primary_part){ col_append_fstr(actx->pinfo->cinfo, COL_INFO, " t30ind: %s", val_to_str(T30ind_value,t38_T30_indicator_vals,"")); } /* info for tap */ if (primary_part) t38_info->t30ind_value = T30ind_value; return offset; } const value_string t38_T30_data_vals[] = { { 0, "v21" }, { 1, "v27-2400" }, { 2, "v27-4800" }, { 3, "v29-7200" }, { 4, "v29-9600" }, { 5, "v17-7200" }, { 6, "v17-9600" }, { 7, "v17-12000" }, { 8, "v17-14400" }, { 9, "v8" }, { 10, "v34-pri-rate" }, { 11, "v34-CC-1200" }, { 12, "v34-pri-ch" }, { 13, "v33-12000" }, { 14, "v33-14400" }, { 0, NULL } }; static int dissect_t38_T30_data(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_enumerated(tvb, offset, actx, tree, hf_index, 9, &Data_value, TRUE, 6, NULL); #line 41 "./asn1/t38/t38.cnf" if (primary_part){ col_append_fstr(actx->pinfo->cinfo, COL_INFO, " data:%s:", val_to_str(Data_value,t38_T30_data_vals,"")); } /* info for tap */ if (primary_part) t38_info->data_value = Data_value; return offset; } static const value_string t38_Type_of_msg_vals[] = { { 0, "t30-indicator" }, { 1, "t30-data" }, { 0, NULL } }; static const per_choice_t Type_of_msg_choice[] = { { 0, &hf_t38_t30_indicator , ASN1_NO_EXTENSIONS , dissect_t38_T30_indicator }, { 1, &hf_t38_t30_data , ASN1_NO_EXTENSIONS , dissect_t38_T30_data }, { 0, NULL, 0, NULL } }; static int dissect_t38_Type_of_msg(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_choice(tvb, offset, actx, tree, hf_index, ett_t38_Type_of_msg, Type_of_msg_choice, &Type_of_msg_value); #line 22 "./asn1/t38/t38.cnf" /* info for tap */ if (primary_part) t38_info->type_msg = Type_of_msg_value; return offset; } static const value_string t38_T_field_type_vals[] = { { 0, "hdlc-data" }, { 1, "hdlc-sig-end" }, { 2, "hdlc-fcs-OK" }, { 3, "hdlc-fcs-BAD" }, { 4, "hdlc-fcs-OK-sig-end" }, { 5, "hdlc-fcs-BAD-sig-end" }, { 6, "t4-non-ecm-data" }, { 7, "t4-non-ecm-sig-end" }, { 8, "cm-message" }, { 9, "jm-message" }, { 10, "ci-message" }, { 11, "v34rate" }, { 0, NULL } }; static int dissect_t38_T_field_type(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_enumerated(tvb, offset, actx, tree, hf_index, 8, &Data_Field_field_type_value, (use_pre_corrigendum_asn1_specification)?FALSE:TRUE, (use_pre_corrigendum_asn1_specification)?0:4, NULL); #line 61 "./asn1/t38/t38.cnf" if (primary_part){ col_append_fstr(actx->pinfo->cinfo, COL_INFO, " %s", val_to_str(Data_Field_field_type_value,t38_T_field_type_vals,"")); } /* We only reassmeble packets in the Primary part and in the first two Items. */ /* There maybe be t38 packets with more than two Items, but reassemble those packets is not easy */ /* using the current ressaemble functions. */ /* TODO: reassemble all the Items in one frame */ if (primary_part && (Data_Field_item_num<2)) { if (Data_Field_field_type_value == 2 || Data_Field_field_type_value == 4 || Data_Field_field_type_value == 7) {/* hdlc-fcs-OK or hdlc-fcs-OK-sig-end or t4-non-ecm-sig-end*/ fragment_head *frag_msg = NULL; tvbuff_t* new_tvb = NULL; gboolean save_fragmented = actx->pinfo->fragmented; actx->pinfo->fragmented = TRUE; /* if reass_start_seqnum=-1 it means we have received the end of the fragmente, without received any fragment data */ if (p_t38_packet_conv_info->reass_start_seqnum != -1) { frag_msg = fragment_add_seq(&data_reassembly_table, /* reassembly table */ tvb, offset, actx->pinfo, p_t38_packet_conv_info->reass_ID, /* ID for fragments belonging together */ NULL, seq_number + Data_Field_item_num - (guint32)p_t38_packet_conv_info->reass_start_seqnum + (guint32)p_t38_packet_conv_info->additional_hdlc_data_field_counter, /* fragment sequence number */ /*0,*/ 0, /* fragment length */ FALSE, /* More fragments */ 0); if ( Data_Field_field_type_value == 7 ) { /* if there was packet lost or other errors during the defrag then frag_msg is NULL. This could also means * there are out of order packets (e.g, got the tail frame t4-non-ecm-sig-end before the last fragment), * but we will assume there was packet lost instead, which is more usual. So, we are going to reassemble the packet * and get some stat, like packet lost and burst number of packet lost */ if (!frag_msg) { force_reassemble_seq(&data_reassembly_table, /* reassembly table */ actx->pinfo, p_t38_packet_conv_info->reass_ID /* ID for fragments belonging together */ ); } else { col_append_str(actx->pinfo->cinfo, COL_INFO, " (t4-data Reassembled: No packet lost)"); g_snprintf(t38_info->desc_comment, MAX_T38_DESC, "No packet lost"); } if (p_t38_packet_conv_info->packet_lost) { g_snprintf(t38_info->desc_comment, MAX_T38_DESC, " Pack lost: %d, Pack burst lost: %d", p_t38_packet_conv_info->packet_lost, p_t38_packet_conv_info->burst_lost); } else { g_snprintf(t38_info->desc_comment, MAX_T38_DESC, "No packet lost"); } process_reassembled_data(tvb, offset, actx->pinfo, "Reassembled T38", frag_msg, &data_frag_items, NULL, tree); /* Now reset fragmentation information in pinfo */ actx->pinfo->fragmented = save_fragmented; t38_info->time_first_t4_data = p_t38_packet_conv_info->time_first_t4_data; t38_info->frame_num_first_t4_data = p_t38_packet_conv_info->reass_ID; /* The reass_ID is the Frame number of the first t4 fragment */ } else { new_tvb = process_reassembled_data(tvb, offset, actx->pinfo, "Reassembled T38", frag_msg, &data_frag_items, NULL, tree); /* Now reset fragmentation information in pinfo */ actx->pinfo->fragmented = save_fragmented; if (new_tvb) call_dissector_with_data((t30_hdlc_handle) ? t30_hdlc_handle : data_handle, new_tvb, actx->pinfo, tree, t38_info); } } else { proto_tree_add_expert_format(tree, actx->pinfo, &ei_t38_malformed, tvb, offset, tvb_reported_length_remaining(tvb, offset), "[RECEIVED END OF FRAGMENT W/OUT ANY FRAGMENT DATA]"); col_append_str(actx->pinfo->cinfo, COL_INFO, " [Malformed?]"); actx->pinfo->fragmented = save_fragmented; } } /* reset the reassemble ID and the start seq number if it is not HDLC data */ if ( p_t38_conv && ( ((Data_Field_field_type_value >0) && (Data_Field_field_type_value <6)) || (Data_Field_field_type_value == 7) ) ){ p_t38_conv_info->reass_ID = 0; p_t38_conv_info->reass_start_seqnum = -1; p_t38_conv_info->additional_hdlc_data_field_counter = 0; p_t38_conv_info->seqnum_prev_data_field = -1; } t38_info->Data_Field_field_type_value = Data_Field_field_type_value; } return offset; } static int dissect_t38_T_field_data(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { #line 151 "./asn1/t38/t38.cnf" tvbuff_t *value_tvb = NULL; guint32 value_len; offset = dissect_per_octet_string(tvb, offset, actx, tree, hf_index, 1, 65535, FALSE, &value_tvb); value_len = tvb_reported_length(value_tvb); #line 158 "./asn1/t38/t38.cnf" if (primary_part){ if(value_len < 8){ col_append_fstr(actx->pinfo->cinfo, COL_INFO, "[%s]", tvb_bytes_to_str(wmem_packet_scope(), value_tvb,0,value_len)); } else { col_append_fstr(actx->pinfo->cinfo, COL_INFO, "[%s...]", tvb_bytes_to_str(wmem_packet_scope(), value_tvb,0,7)); } } /* We only reassmeble packets in the Primary part and in the first two Items. */ /* There maybe be t38 packets with more than two Items, but reassemble those packets is not easy */ /* using the current ressaemble functions. */ /* TODO: reassemble all the Items in one frame */ if (primary_part && (Data_Field_item_num<2)) { fragment_head *frag_msg = NULL; /* HDLC Data or t4-non-ecm-data */ if (Data_Field_field_type_value == 0 || Data_Field_field_type_value == 6) { /* 0=HDLC Data or 6=t4-non-ecm-data*/ gboolean save_fragmented = actx->pinfo->fragmented; actx->pinfo->fragmented = TRUE; /* if we have not reassembled this packet and it is the first fragment, reset the reassemble ID and the start seq number*/ if (p_t38_packet_conv && p_t38_conv && (p_t38_packet_conv_info->reass_ID == 0)) { /* we use the first fragment's frame_number as fragment ID because the protocol doesn't provide it */ p_t38_conv_info->reass_ID = actx->pinfo->num; p_t38_conv_info->reass_start_seqnum = seq_number; p_t38_conv_info->time_first_t4_data = nstime_to_sec(&actx->pinfo->rel_ts); p_t38_conv_info->additional_hdlc_data_field_counter = 0; p_t38_packet_conv_info->reass_ID = p_t38_conv_info->reass_ID; p_t38_packet_conv_info->reass_start_seqnum = p_t38_conv_info->reass_start_seqnum; p_t38_packet_conv_info->seqnum_prev_data_field = p_t38_conv_info->seqnum_prev_data_field; p_t38_packet_conv_info->additional_hdlc_data_field_counter = p_t38_conv_info->additional_hdlc_data_field_counter; p_t38_packet_conv_info->time_first_t4_data = p_t38_conv_info->time_first_t4_data; } if (seq_number == (guint32)p_t38_packet_conv_info->seqnum_prev_data_field){ p_t38_packet_conv_info->additional_hdlc_data_field_counter ++; if(p_t38_conv){ p_t38_conv_info->additional_hdlc_data_field_counter = p_t38_packet_conv_info->additional_hdlc_data_field_counter; } } frag_msg = fragment_add_seq(&data_reassembly_table, value_tvb, 0, actx->pinfo, p_t38_packet_conv_info->reass_ID, /* ID for fragments belonging together */ NULL, seq_number - (guint32)p_t38_packet_conv_info->reass_start_seqnum + (guint32)p_t38_packet_conv_info->additional_hdlc_data_field_counter, /* fragment sequence number */ value_len, /* fragment length */ TRUE, /* More fragments */ 0); p_t38_packet_conv_info->seqnum_prev_data_field = (gint32)seq_number; process_reassembled_data(tvb, offset, actx->pinfo, "Reassembled T38", frag_msg, &data_frag_items, NULL, tree); if (!frag_msg) { /* Not last packet of reassembled */ if (Data_Field_field_type_value == 0) { col_append_fstr(actx->pinfo->cinfo, COL_INFO," (HDLC fragment %u)", seq_number + (guint32)p_t38_packet_conv_info->additional_hdlc_data_field_counter - (guint32)p_t38_packet_conv_info->reass_start_seqnum); } else { col_append_fstr(actx->pinfo->cinfo, COL_INFO," (t4-data fragment %u)", seq_number - (guint32)p_t38_packet_conv_info->reass_start_seqnum); } } /* Now reset fragmentation information in pinfo */ actx->pinfo->fragmented = save_fragmented; } } return offset; } static const per_sequence_t Data_Field_item_sequence[] = { { &hf_t38_field_type , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_T_field_type }, { &hf_t38_field_data , ASN1_NO_EXTENSIONS , ASN1_OPTIONAL , dissect_t38_T_field_data }, { NULL, 0, 0, NULL } }; static int dissect_t38_Data_Field_item(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_sequence(tvb, offset, actx, tree, hf_index, ett_t38_Data_Field_item, Data_Field_item_sequence); #line 53 "./asn1/t38/t38.cnf" if (primary_part) Data_Field_item_num++; return offset; } static const per_sequence_t Data_Field_sequence_of[1] = { { &hf_t38_Data_Field_item , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_Data_Field_item }, }; static int dissect_t38_Data_Field(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_sequence_of(tvb, offset, actx, tree, hf_index, ett_t38_Data_Field, Data_Field_sequence_of); return offset; } static const per_sequence_t IFPPacket_sequence[] = { { &hf_t38_type_of_msg , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_Type_of_msg }, { &hf_t38_data_field , ASN1_NO_EXTENSIONS , ASN1_OPTIONAL , dissect_t38_Data_Field }, { NULL, 0, 0, NULL } }; static int dissect_t38_IFPPacket(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_sequence(tvb, offset, actx, tree, hf_index, ett_t38_IFPPacket, IFPPacket_sequence); return offset; } static int dissect_t38_T_seq_number(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_constrained_integer(tvb, offset, actx, tree, hf_index, 0U, 65535U, &seq_number, FALSE); #line 238 "./asn1/t38/t38.cnf" /* info for tap */ if (primary_part) t38_info->seq_num = seq_number; col_append_fstr(actx->pinfo->cinfo, COL_INFO, "Seq=%05u ",seq_number); return offset; } static int dissect_t38_T_primary_ifp_packet(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { #line 246 "./asn1/t38/t38.cnf" primary_part = TRUE; offset = dissect_per_open_type(tvb, offset, actx, tree, hf_index, dissect_t38_IFPPacket); #line 248 "./asn1/t38/t38.cnf" /* if is a valid t38 packet, add to tap */ /* Note that t4-non-ecm-sig-end without first_t4_data is not valid */ if (p_t38_packet_conv && (!actx->pinfo->flags.in_error_pkt) && ((gint32) seq_number != p_t38_packet_conv_info->last_seqnum) && !(t38_info->type_msg == 1 && t38_info->Data_Field_field_type_value == 7 && t38_info->frame_num_first_t4_data == 0)) tap_queue_packet(t38_tap, actx->pinfo, t38_info); if (p_t38_conv) p_t38_conv_info->last_seqnum = (gint32) seq_number; return offset; } static int dissect_t38_OpenType_IFPPacket(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_open_type(tvb, offset, actx, tree, hf_index, dissect_t38_IFPPacket); return offset; } static const per_sequence_t T_secondary_ifp_packets_sequence_of[1] = { { &hf_t38_secondary_ifp_packets_item, ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_OpenType_IFPPacket }, }; static int dissect_t38_T_secondary_ifp_packets(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_sequence_of(tvb, offset, actx, tree, hf_index, ett_t38_T_secondary_ifp_packets, T_secondary_ifp_packets_sequence_of); return offset; } static int dissect_t38_INTEGER(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_integer(tvb, offset, actx, tree, hf_index, NULL); return offset; } static int dissect_t38_OCTET_STRING(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_octet_string(tvb, offset, actx, tree, hf_index, NO_BOUND, NO_BOUND, FALSE, NULL); return offset; } static const per_sequence_t T_fec_data_sequence_of[1] = { { &hf_t38_fec_data_item , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_OCTET_STRING }, }; static int dissect_t38_T_fec_data(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_sequence_of(tvb, offset, actx, tree, hf_index, ett_t38_T_fec_data, T_fec_data_sequence_of); return offset; } static const per_sequence_t T_fec_info_sequence[] = { { &hf_t38_fec_npackets , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_INTEGER }, { &hf_t38_fec_data , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_T_fec_data }, { NULL, 0, 0, NULL } }; static int dissect_t38_T_fec_info(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { offset = dissect_per_sequence(tvb, offset, actx, tree, hf_index, ett_t38_T_fec_info, T_fec_info_sequence); return offset; } static const value_string t38_T_error_recovery_vals[] = { { 0, "secondary-ifp-packets" }, { 1, "fec-info" }, { 0, NULL } }; static const per_choice_t T_error_recovery_choice[] = { { 0, &hf_t38_secondary_ifp_packets, ASN1_NO_EXTENSIONS , dissect_t38_T_secondary_ifp_packets }, { 1, &hf_t38_fec_info , ASN1_NO_EXTENSIONS , dissect_t38_T_fec_info }, { 0, NULL, 0, NULL } }; static int dissect_t38_T_error_recovery(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { #line 258 "./asn1/t38/t38.cnf" primary_part = FALSE; offset = dissect_per_choice(tvb, offset, actx, tree, hf_index, ett_t38_T_error_recovery, T_error_recovery_choice, NULL); #line 260 "./asn1/t38/t38.cnf" primary_part = TRUE; return offset; } static const per_sequence_t UDPTLPacket_sequence[] = { { &hf_t38_seq_number , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_T_seq_number }, { &hf_t38_primary_ifp_packet, ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_T_primary_ifp_packet }, { &hf_t38_error_recovery , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_T_error_recovery }, { NULL, 0, 0, NULL } }; static int dissect_t38_UDPTLPacket(tvbuff_t *tvb _U_, int offset _U_, asn1_ctx_t *actx _U_, proto_tree *tree _U_, int hf_index _U_) { #line 232 "./asn1/t38/t38.cnf" /* Initialize to something else than data type */ Data_Field_field_type_value = 1; offset = dissect_per_sequence(tvb, offset, actx, tree, hf_index, ett_t38_UDPTLPacket, UDPTLPacket_sequence); return offset; } /*--- PDUs ---*/ static int dissect_IFPPacket_PDU(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_, void *data _U_) { int offset = 0; asn1_ctx_t asn1_ctx; asn1_ctx_init(&asn1_ctx, ASN1_ENC_PER, TRUE, pinfo); offset = dissect_t38_IFPPacket(tvb, offset, &asn1_ctx, tree, hf_t38_IFPPacket_PDU); offset += 7; offset >>= 3; return offset; } static int dissect_UDPTLPacket_PDU(tvbuff_t *tvb _U_, packet_info *pinfo _U_, proto_tree *tree _U_, void *data _U_) { int offset = 0; asn1_ctx_t asn1_ctx; asn1_ctx_init(&asn1_ctx, ASN1_ENC_PER, TRUE, pinfo); offset = dissect_t38_UDPTLPacket(tvb, offset, &asn1_ctx, tree, hf_t38_UDPTLPacket_PDU); offset += 7; offset >>= 3; return offset; } /*--- End of included file: packet-t38-fn.c ---*/ #line 394 "./asn1/t38/packet-t38-template.c" /* initialize the tap t38_info and the conversation */ static void init_t38_info_conv(packet_info *pinfo) { /* tap info */ t38_info_current++; if (t38_info_current==MAX_T38_MESSAGES_IN_PACKET) { t38_info_current=0; } t38_info = &t38_info_arr[t38_info_current]; t38_info->seq_num = 0; t38_info->type_msg = 0; t38_info->data_value = 0; t38_info->t30ind_value =0; t38_info->setup_frame_number = 0; t38_info->Data_Field_field_type_value = 0; t38_info->desc[0] = '\0'; t38_info->desc_comment[0] = '\0'; t38_info->time_first_t4_data = 0; t38_info->frame_num_first_t4_data = 0; /* p_t38_packet_conv hold the conversation info in each of the packets. p_t38_conv hold the conversation info used to reassemble the HDLC packets, and also the Setup info (e.g SDP) If we already have p_t38_packet_conv in the packet, it means we already reassembled the HDLC packets, so we don't need to use p_t38_conv */ p_t38_packet_conv = NULL; p_t38_conv = NULL; /* Use existing packet info if available */ p_t38_packet_conv = (t38_conv *)p_get_proto_data(wmem_file_scope(), pinfo, proto_t38, 0); /* find the conversation used for Reassemble and Setup Info */ p_conv = find_conversation(pinfo->num, &pinfo->net_dst, &pinfo->net_src, pinfo->ptype, pinfo->destport, pinfo->srcport, NO_ADDR_B | NO_PORT_B); /* create a conv if it doen't exist */ if (!p_conv) { p_conv = conversation_new(pinfo->num, &pinfo->net_src, &pinfo->net_dst, pinfo->ptype, pinfo->srcport, pinfo->destport, NO_ADDR_B | NO_PORT_B); /* Set dissector */ conversation_set_dissector(p_conv, t38_udp_handle); } p_t38_conv = (t38_conv *)conversation_get_proto_data(p_conv, proto_t38); /* create the conversation if it doesn't exist */ if (!p_t38_conv) { p_t38_conv = wmem_new(wmem_file_scope(), t38_conv); p_t38_conv->setup_method[0] = '\0'; p_t38_conv->setup_frame_number = 0; p_t38_conv->src_t38_info.reass_ID = 0; p_t38_conv->src_t38_info.reass_start_seqnum = -1; p_t38_conv->src_t38_info.reass_data_type = 0; p_t38_conv->src_t38_info.last_seqnum = -1; p_t38_conv->src_t38_info.packet_lost = 0; p_t38_conv->src_t38_info.burst_lost = 0; p_t38_conv->src_t38_info.time_first_t4_data = 0; p_t38_conv->src_t38_info.additional_hdlc_data_field_counter = 0; p_t38_conv->src_t38_info.seqnum_prev_data_field = -1; p_t38_conv->dst_t38_info.reass_ID = 0; p_t38_conv->dst_t38_info.reass_start_seqnum = -1; p_t38_conv->dst_t38_info.reass_data_type = 0; p_t38_conv->dst_t38_info.last_seqnum = -1; p_t38_conv->dst_t38_info.packet_lost = 0; p_t38_conv->dst_t38_info.burst_lost = 0; p_t38_conv->dst_t38_info.time_first_t4_data = 0; p_t38_conv->dst_t38_info.additional_hdlc_data_field_counter = 0; p_t38_conv->dst_t38_info.seqnum_prev_data_field = -1; conversation_add_proto_data(p_conv, proto_t38, p_t38_conv); } if (!p_t38_packet_conv) { /* copy the t38 conversation info to the packet t38 conversation */ p_t38_packet_conv = wmem_new(wmem_file_scope(), t38_conv); g_strlcpy(p_t38_packet_conv->setup_method, p_t38_conv->setup_method, MAX_T38_SETUP_METHOD_SIZE); p_t38_packet_conv->setup_frame_number = p_t38_conv->setup_frame_number; memcpy(&(p_t38_packet_conv->src_t38_info), &(p_t38_conv->src_t38_info), sizeof(t38_conv_info)); memcpy(&(p_t38_packet_conv->dst_t38_info), &(p_t38_conv->dst_t38_info), sizeof(t38_conv_info)); p_add_proto_data(wmem_file_scope(), pinfo, proto_t38, 0, p_t38_packet_conv); } if (addresses_equal(&p_conv->key_ptr->addr1, &pinfo->net_src)) { p_t38_conv_info = &(p_t38_conv->src_t38_info); p_t38_packet_conv_info = &(p_t38_packet_conv->src_t38_info); } else { p_t38_conv_info = &(p_t38_conv->dst_t38_info); p_t38_packet_conv_info = &(p_t38_packet_conv->dst_t38_info); } /* update t38_info */ t38_info->setup_frame_number = p_t38_packet_conv->setup_frame_number; } /* Entry point for dissection */ static int dissect_t38_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { guint8 octet1; proto_item *it; proto_tree *tr; guint32 offset=0; /* * XXX - heuristic to check for misidentified packets. */ if (dissect_possible_rtpv2_packets_as_rtp){ octet1 = tvb_get_guint8(tvb, offset); if (RTP_VERSION(octet1) == 2){ return call_dissector(rtp_handle,tvb,pinfo,tree); } } col_set_str(pinfo->cinfo, COL_PROTOCOL, "T.38"); col_clear(pinfo->cinfo, COL_INFO); primary_part = TRUE; /* This indicate the item number in the primary part of the T38 message, it is used for the reassemble of T30 packets */ Data_Field_item_num = 0; it=proto_tree_add_protocol_format(tree, proto_t38, tvb, 0, -1, "ITU-T Recommendation T.38"); tr=proto_item_add_subtree(it, ett_t38); /* init tap and conv info */ init_t38_info_conv(pinfo); /* Show Conversation setup info if exists*/ if (global_t38_show_setup_info) { show_setup_info(tvb, tr, p_t38_packet_conv); } col_append_str(pinfo->cinfo, COL_INFO, "UDP: UDPTLPacket "); offset = dissect_UDPTLPacket_PDU(tvb, pinfo, tr, NULL); if (tvb_reported_length_remaining(tvb,offset)>0){ proto_tree_add_expert_format(tr, pinfo, &ei_t38_malformed, tvb, offset, tvb_reported_length_remaining(tvb, offset), "[MALFORMED PACKET or wrong preference settings]"); col_append_str(pinfo->cinfo, COL_INFO, " [Malformed?]"); } return tvb_captured_length(tvb); } static int dissect_t38_tcp_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_item *it; proto_tree *tr; guint32 offset=0; tvbuff_t *next_tvb; guint16 ifp_packet_number=1; col_set_str(pinfo->cinfo, COL_PROTOCOL, "T.38"); col_clear(pinfo->cinfo, COL_INFO); primary_part = TRUE; /* This indicate the item number in the primary part of the T38 message, it is used for the reassemble of T30 packets */ Data_Field_item_num = 0; it=proto_tree_add_protocol_format(tree, proto_t38, tvb, 0, -1, "ITU-T Recommendation T.38"); tr=proto_item_add_subtree(it, ett_t38); /* init tap and conv info */ init_t38_info_conv(pinfo); /* Show Conversation setup info if exists*/ if (global_t38_show_setup_info) { show_setup_info(tvb, tr, p_t38_packet_conv); } col_append_str(pinfo->cinfo, COL_INFO, "TCP: IFPPacket"); while(tvb_reported_length_remaining(tvb,offset)>0) { next_tvb = tvb_new_subset_remaining(tvb, offset); offset += dissect_IFPPacket_PDU(next_tvb, pinfo, tr, NULL); ifp_packet_number++; if(tvb_reported_length_remaining(tvb,offset)>0){ if(t38_tpkt_usage == T38_TPKT_ALWAYS){ proto_tree_add_expert_format(tr, pinfo, &ei_t38_malformed, tvb, offset, tvb_reported_length_remaining(tvb, offset), "[MALFORMED PACKET or wrong preference settings]"); col_append_str(pinfo->cinfo, COL_INFO, " [Malformed?]"); break; }else { col_append_fstr(pinfo->cinfo, COL_INFO, " IFPPacket#%u",ifp_packet_number); } } } return tvb_captured_length(tvb); } static int dissect_t38_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { primary_part = TRUE; if(t38_tpkt_usage == T38_TPKT_ALWAYS){ dissect_tpkt_encap(tvb,pinfo,tree,t38_tpkt_reassembly,t38_tcp_pdu_handle); } else if((t38_tpkt_usage == T38_TPKT_NEVER) || (is_tpkt(tvb,1) == -1)){ dissect_t38_tcp_pdu(tvb, pinfo, tree, data); } else { dissect_tpkt_encap(tvb,pinfo,tree,t38_tpkt_reassembly,t38_tcp_pdu_handle); } return tvb_captured_length(tvb); } /* Look for conversation info and display any setup info found */ void show_setup_info(tvbuff_t *tvb, proto_tree *tree, t38_conv *p_t38_conversation) { proto_tree *t38_setup_tree; proto_item *ti; if (!p_t38_conversation || p_t38_conversation->setup_frame_number == 0) { /* there is no Setup info */ return; } ti = proto_tree_add_string_format(tree, hf_t38_setup, tvb, 0, 0, "", "Stream setup by %s (frame %u)", p_t38_conversation->setup_method, p_t38_conversation->setup_frame_number); PROTO_ITEM_SET_GENERATED(ti); t38_setup_tree = proto_item_add_subtree(ti, ett_t38_setup); if (t38_setup_tree) { /* Add details into subtree */ proto_item* item = proto_tree_add_uint(t38_setup_tree, hf_t38_setup_frame, tvb, 0, 0, p_t38_conversation->setup_frame_number); PROTO_ITEM_SET_GENERATED(item); item = proto_tree_add_string(t38_setup_tree, hf_t38_setup_method, tvb, 0, 0, p_t38_conversation->setup_method); PROTO_ITEM_SET_GENERATED(item); } } /* Wireshark Protocol Registration */ void proto_register_t38(void) { static hf_register_info hf[] = { /*--- Included file: packet-t38-hfarr.c ---*/ #line 1 "./asn1/t38/packet-t38-hfarr.c" { &hf_t38_IFPPacket_PDU, { "IFPPacket", "t38.IFPPacket_element", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_t38_UDPTLPacket_PDU, { "UDPTLPacket", "t38.UDPTLPacket_element", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_t38_type_of_msg, { "type-of-msg", "t38.type_of_msg", FT_UINT32, BASE_DEC, VALS(t38_Type_of_msg_vals), 0, NULL, HFILL }}, { &hf_t38_data_field, { "data-field", "t38.data_field", FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL }}, { &hf_t38_t30_indicator, { "t30-indicator", "t38.t30_indicator", FT_UINT32, BASE_DEC, VALS(t38_T30_indicator_vals), 0, NULL, HFILL }}, { &hf_t38_t30_data, { "t30-data", "t38.t30_data", FT_UINT32, BASE_DEC, VALS(t38_T30_data_vals), 0, NULL, HFILL }}, { &hf_t38_Data_Field_item, { "Data-Field item", "t38.Data_Field_item_element", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_t38_field_type, { "field-type", "t38.field_type", FT_UINT32, BASE_DEC, VALS(t38_T_field_type_vals), 0, NULL, HFILL }}, { &hf_t38_field_data, { "field-data", "t38.field_data", FT_BYTES, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_t38_seq_number, { "seq-number", "t38.seq_number", FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL }}, { &hf_t38_primary_ifp_packet, { "primary-ifp-packet", "t38.primary_ifp_packet_element", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_t38_error_recovery, { "error-recovery", "t38.error_recovery", FT_UINT32, BASE_DEC, VALS(t38_T_error_recovery_vals), 0, NULL, HFILL }}, { &hf_t38_secondary_ifp_packets, { "secondary-ifp-packets", "t38.secondary_ifp_packets", FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL }}, { &hf_t38_secondary_ifp_packets_item, { "secondary-ifp-packets item", "t38.secondary_ifp_packets_item_element", FT_NONE, BASE_NONE, NULL, 0, "OpenType_IFPPacket", HFILL }}, { &hf_t38_fec_info, { "fec-info", "t38.fec_info_element", FT_NONE, BASE_NONE, NULL, 0, NULL, HFILL }}, { &hf_t38_fec_npackets, { "fec-npackets", "t38.fec_npackets", FT_INT32, BASE_DEC, NULL, 0, "INTEGER", HFILL }}, { &hf_t38_fec_data, { "fec-data", "t38.fec_data", FT_UINT32, BASE_DEC, NULL, 0, NULL, HFILL }}, { &hf_t38_fec_data_item, { "fec-data item", "t38.fec_data_item", FT_BYTES, BASE_NONE, NULL, 0, "OCTET_STRING", HFILL }}, /*--- End of included file: packet-t38-hfarr.c ---*/ #line 658 "./asn1/t38/packet-t38-template.c" { &hf_t38_setup, { "Stream setup", "t38.setup", FT_STRING, BASE_NONE, NULL, 0x0, "Stream setup, method and frame number", HFILL }}, { &hf_t38_setup_frame, { "Stream frame", "t38.setup-frame", FT_FRAMENUM, BASE_NONE, NULL, 0x0, "Frame that set up this stream", HFILL }}, { &hf_t38_setup_method, { "Stream Method", "t38.setup-method", FT_STRING, BASE_NONE, NULL, 0x0, "Method used to set up this stream", HFILL }}, {&hf_t38_fragments, {"Message fragments", "t38.fragments", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, {&hf_t38_fragment, {"Message fragment", "t38.fragment", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } }, {&hf_t38_fragment_overlap, {"Message fragment overlap", "t38.fragment.overlap", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } }, {&hf_t38_fragment_overlap_conflicts, {"Message fragment overlapping with conflicting data", "t38.fragment.overlap.conflicts", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } }, {&hf_t38_fragment_multiple_tails, {"Message has multiple tail fragments", "t38.fragment.multiple_tails", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } }, {&hf_t38_fragment_too_long_fragment, {"Message fragment too long", "t38.fragment.too_long_fragment", FT_BOOLEAN, BASE_NONE, NULL, 0x0, NULL, HFILL } }, {&hf_t38_fragment_error, {"Message defragmentation error", "t38.fragment.error", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } }, {&hf_t38_fragment_count, {"Message fragment count", "t38.fragment.count", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } }, {&hf_t38_reassembled_in, {"Reassembled in", "t38.reassembled.in", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } }, {&hf_t38_reassembled_length, {"Reassembled T38 length", "t38.reassembled.length", FT_UINT32, BASE_DEC, NULL, 0x00, NULL, HFILL } }, }; static gint *ett[] = { &ett_t38, /*--- Included file: packet-t38-ettarr.c ---*/ #line 1 "./asn1/t38/packet-t38-ettarr.c" &ett_t38_IFPPacket, &ett_t38_Type_of_msg, &ett_t38_Data_Field, &ett_t38_Data_Field_item, &ett_t38_UDPTLPacket, &ett_t38_T_error_recovery, &ett_t38_T_secondary_ifp_packets, &ett_t38_T_fec_info, &ett_t38_T_fec_data, /*--- End of included file: packet-t38-ettarr.c ---*/ #line 705 "./asn1/t38/packet-t38-template.c" &ett_t38_setup, &ett_data_fragment, &ett_data_fragments }; static ei_register_info ei[] = { { &ei_t38_malformed, { "t38.malformed", PI_MALFORMED, PI_ERROR, "Malformed packet", EXPFILL }}, }; module_t *t38_module; expert_module_t* expert_t38; proto_t38 = proto_register_protocol("T.38", "T.38", "t38"); proto_register_field_array(proto_t38, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); expert_t38 = expert_register_protocol(proto_t38); expert_register_field_array(expert_t38, ei, array_length(ei)); register_dissector("t38_udp", dissect_t38_udp, proto_t38); /* Init reassemble tables for HDLC */ register_init_routine(t38_defragment_init); register_cleanup_routine(t38_defragment_cleanup); t38_tap = register_tap("t38"); t38_module = prefs_register_protocol(proto_t38, proto_reg_handoff_t38); prefs_register_bool_preference(t38_module, "use_pre_corrigendum_asn1_specification", "Use the Pre-Corrigendum ASN.1 specification", "Whether the T.38 dissector should decode using the Pre-Corrigendum T.38 " "ASN.1 specification (1998).", &use_pre_corrigendum_asn1_specification); prefs_register_bool_preference(t38_module, "dissect_possible_rtpv2_packets_as_rtp", "Dissect possible RTP version 2 packets with RTP dissector", "Whether a UDP packet that looks like RTP version 2 packet will " "be dissected as RTP packet or T.38 packet. If enabled there is a risk that T.38 UDPTL " "packets with sequence number higher than 32767 may be dissected as RTP.", &dissect_possible_rtpv2_packets_as_rtp); prefs_register_obsolete_preference(t38_module, "tcp.port"); prefs_register_obsolete_preference(t38_module, "udp.port"); prefs_register_bool_preference(t38_module, "reassembly", "Reassemble T.38 PDUs over TPKT over TCP", "Whether the dissector should reassemble T.38 PDUs spanning multiple TCP segments " "when TPKT is used over TCP. " "To use this option, you must also enable \"Allow subdissectors to reassemble " "TCP streams\" in the TCP protocol settings.", &t38_tpkt_reassembly); prefs_register_enum_preference(t38_module, "tpkt_usage", "TPKT used over TCP", "Whether T.38 is used with TPKT for TCP", (gint *)&t38_tpkt_usage,t38_tpkt_options,FALSE); prefs_register_bool_preference(t38_module, "show_setup_info", "Show stream setup information", "Where available, show which protocol and frame caused " "this T.38 stream to be created", &global_t38_show_setup_info); } void proto_reg_handoff_t38(void) { static gboolean t38_prefs_initialized = FALSE; if (!t38_prefs_initialized) { t38_udp_handle=create_dissector_handle(dissect_t38_udp, proto_t38); t38_tcp_handle=create_dissector_handle(dissect_t38_tcp, proto_t38); t38_tcp_pdu_handle=create_dissector_handle(dissect_t38_tcp_pdu, proto_t38); rtp_handle = find_dissector_add_dependency("rtp", proto_t38); t30_hdlc_handle = find_dissector_add_dependency("t30.hdlc""rtp", proto_t38); data_handle = find_dissector("data"); t38_prefs_initialized = TRUE; } }