/* 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 * * $Id$ * * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, 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. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include #include #include #include "packet-t38.h" #include #include #include "packet-per.h" #include #include "packet-tpkt.h" #include #define PORT_T38 6004 static guint global_t38_tcp_port = PORT_T38; static guint global_t38_udp_port = PORT_T38; static int t38_tap = -1; /* * Variables to allow for proper deletion of dissector registration when * the user changes port from the gui. */ static guint tcp_port = 0; static guint udp_port = 0; /* 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} }; /* T30 */ static int proto_t30 = -1; static int hf_t30_Address = -1; static int hf_t30_Control = -1; static int hf_t30_Facsimile_Control = -1; static int hf_t30_fif_sm = -1; static int hf_t30_fif_rtif = -1; static int hf_t30_fif_3gmn = -1; static int hf_t30_fif_v8c = -1; static int hf_t30_fif_op = -1; static int hf_t30_fif_rtfc = -1; static int hf_t30_fif_rfo = -1; static int hf_t30_fif_dsr = -1; static int hf_t30_fif_dsr_dcs = -1; static int hf_t30_fif_res = -1; static int hf_t30_fif_tdcc = -1; static int hf_t30_fif_rwc = -1; static int hf_t30_fif_rw_dcs = -1; static int hf_t30_fif_rlc = -1; static int hf_t30_fif_rl_dcs = -1; static int hf_t30_fif_msltcr = -1; static int hf_t30_fif_mslt_dcs = -1; static int hf_t30_fif_ext = -1; static int hf_t30_fif_cm = -1; static int hf_t30_fif_ecm = -1; static int hf_t30_fif_fs_dcs = -1; static int hf_t30_fif_t6 = -1; static int hf_t30_fif_fvc = -1; static int hf_t30_fif_mspc = -1; static int hf_t30_fif_ps = -1; static int hf_t30_fif_t43 = -1; static int hf_t30_fif_pi = -1; static int hf_t30_fif_vc32k = -1; static int hf_t30_fif_r8x15 = -1; static int hf_t30_fif_300x300 = -1; static int hf_t30_fif_r16x15 = -1; static int hf_t30_fif_ibrp = -1; static int hf_t30_fif_mbrp = -1; static int hf_t30_fif_msltchr = -1; static int hf_t30_fif_rts = -1; static int hf_t30_fif_sp = -1; static int hf_t30_fif_sc = -1; static int hf_t30_fif_passw = -1; static int hf_t30_fif_sit = -1; static int hf_t30_fif_rttd = -1; static int hf_t30_fif_bft = -1; static int hf_t30_fif_dtm = -1; static int hf_t30_fif_edi = -1; static int hf_t30_fif_btm = -1; static int hf_t30_fif_rttcmmd = -1; static int hf_t30_fif_chrm = -1; static int hf_t30_fif_mm = -1; static int hf_t30_fif_pm26 = -1; static int hf_t30_fif_dnc = -1; static int hf_t30_fif_do = -1; static int hf_t30_fif_jpeg = -1; static int hf_t30_fif_fcm = -1; static int hf_t30_fif_pht = -1; static int hf_t30_fif_12c = -1; static int hf_t30_fif_ns = -1; static int hf_t30_fif_ci = -1; static int hf_t30_fif_cgr = -1; static int hf_t30_fif_nalet = -1; static int hf_t30_fif_naleg = -1; static int hf_t30_fif_spscb = -1; static int hf_t30_fif_spsco = -1; static int hf_t30_fif_hkm = -1; static int hf_t30_fif_rsa = -1; static int hf_t30_fif_oc = -1; static int hf_t30_fif_hfx40 = -1; static int hf_t30_fif_acn2c = -1; static int hf_t30_fif_acn3c = -1; static int hf_t30_fif_hfx40i = -1; static int hf_t30_fif_ahsn2 = -1; static int hf_t30_fif_ahsn3 = -1; static int hf_t30_fif_t441 = -1; static int hf_t30_fif_t442 = -1; static int hf_t30_fif_t443 = -1; static int hf_t30_fif_plmss = -1; static int hf_t30_fif_cg300 = -1; static int hf_t30_fif_100x100cg = -1; static int hf_t30_fif_spcbft = -1; static int hf_t30_fif_ebft = -1; static int hf_t30_fif_isp = -1; static int hf_t30_fif_ira = -1; static int hf_t30_fif_600x600 = -1; static int hf_t30_fif_1200x1200 = -1; static int hf_t30_fif_300x600 = -1; static int hf_t30_fif_400x800 = -1; static int hf_t30_fif_600x1200 = -1; static int hf_t30_fif_cg600x600 = -1; static int hf_t30_fif_cg1200x1200 = -1; static int hf_t30_fif_dspcam = -1; static int hf_t30_fif_dspccm = -1; static int hf_t30_fif_bwmrcp = -1; static int hf_t30_fif_t45 = -1; static int hf_t30_fif_sdmc = -1; static int hf_t30_fif_number = -1; static int hf_t30_fif_country_code = -1; static int hf_t30_fif_non_stand_bytes = -1; static int hf_t30_t4_frame_num = -1; static int hf_t30_t4_data = -1; static int hf_t30_partial_page_fcf2 = -1; static int hf_t30_partial_page_i1 = -1; static int hf_t30_partial_page_i2 = -1; static int hf_t30_partial_page_i3 = -1; static gint ett_t30 = -1; static gint ett_t30_fif = -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 guint32 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; static int hf_t38_IFPPacket = -1; static int hf_t38_Type_of_msg = -1; static int hf_t38_t30_indicator = -1; static int hf_t38_data = -1; static int hf_t38_Data_Field = -1; static int hf_t38_Data_Field_item = -1; static int hf_t38_Data_Field_field_type = -1; static int hf_t38_Data_Field_field_data = -1; static int hf_t38_UDPTLPacket = -1; static int hf_t38_seq_number = -1; static int hf_t38_primary_ifp_packet = -1; static int hf_t38_primary_ifp_packet_length = -1; static int hf_t38_error_recovery = -1; static int hf_t38_secondary_ifp_packets = -1; static int hf_t38_secondary_ifp_packets_item = -1; static int hf_t38_secondary_ifp_packets_item_length = -1; static int hf_t38_fec_info = -1; static int hf_t38_fec_npackets = -1; static int hf_t38_fec_data = -1; static int hf_t38_fec_data_item = -1; /* 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_data_fragments = -1; static int hf_data_fragment = -1; static int hf_data_fragment_overlap = -1; static int hf_data_fragment_overlap_conflicts = -1; static int hf_data_fragment_multiple_tails = -1; static int hf_data_fragment_too_long_fragment = -1; static int hf_data_fragment_error = -1; static int hf_data_reassembled_in = -1; static gint ett_t38 = -1; static gint ett_t38_IFPPacket = -1; static gint ett_t38_Type_of_msg = -1; static gint ett_t38_t30_indicator = -1; static gint ett_t38_data = -1; static gint ett_t38_Data_Field = -1; static gint ett_t38_Data_Field_item = -1; static gint ett_t38_Data_Field_field_type = -1; static gint ett_t38_UDPTLPacket = -1; static gint ett_t38_error_recovery = -1; static gint ett_t38_secondary_ifp_packets = -1; static gint ett_t38_fec_info = -1; static gint ett_t38_fec_data = -1; static gint ett_t38_setup = -1; static gint ett_data_fragment = -1; static gint ett_data_fragments = -1; static gboolean primary_part = TRUE; static guint32 seq_number = 0; /* Tables for reassembly of Data fragments. */ static GHashTable *data_fragment_table = NULL; static GHashTable *data_reassembled_table = NULL; static const fragment_items data_frag_items = { /* Fragment subtrees */ &ett_data_fragment, &ett_data_fragments, /* Fragment fields */ &hf_data_fragments, &hf_data_fragment, &hf_data_fragment_overlap, &hf_data_fragment_overlap_conflicts, &hf_data_fragment_multiple_tails, &hf_data_fragment_too_long_fragment, &hf_data_fragment_error, /* Reassembled in field */ &hf_data_reassembled_in, /* 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, packet_info *pinfo, proto_tree *tree, conversation_t *p_conv, 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 reassemble tables */ fragment_table_init(&data_fragment_table); reassembled_table_init(&data_reassembled_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_conv; t38_conv* p_conv_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) { return; } SET_ADDRESS(&null_addr, AT_NONE, 0, NULL); /* * Check if the ip address and port combination is not * already registered as a conversation. */ p_conv = 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_conv || p_conv->setup_frame != setup_frame_number) { p_conv = 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_conv, t38_udp_handle); /* * Check if the conversation has data associated with it. */ p_conv_data = conversation_get_proto_data(p_conv, proto_t38); /* * If not, add a new data item. */ if ( ! p_conv_data ) { /* Create conversation data */ p_conv_data = se_alloc(sizeof(t38_conv)); conversation_add_proto_data(p_conv, proto_t38, p_conv_data); } /* * Update the conversation data. */ strncpy(p_conv_data->setup_method, setup_method, MAX_T38_SETUP_METHOD_SIZE); p_conv_data->setup_method[MAX_T38_SETUP_METHOD_SIZE] = '\0'; p_conv_data->setup_frame_number = setup_frame_number; p_conv_data->src_t38_info.reass_ID = 0; p_conv_data->src_t38_info.reass_start_seqnum = -1; p_conv_data->src_t38_info.reass_data_type = 0; p_conv_data->src_t38_info.last_seqnum = -1; p_conv_data->src_t38_info.packet_lost = 0; p_conv_data->src_t38_info.burst_lost = 0; p_conv_data->src_t38_info.time_first_t4_data = 0; p_conv_data->dst_t38_info.reass_ID = 0; p_conv_data->dst_t38_info.reass_start_seqnum = -1; p_conv_data->dst_t38_info.reass_data_type = 0; p_conv_data->dst_t38_info.last_seqnum = -1; p_conv_data->dst_t38_info.packet_lost = 0; p_conv_data->dst_t38_info.burst_lost = 0; p_conv_data->dst_t38_info.time_first_t4_data = 0; } /* T30 Routines */ static int dissect_t30_NULL(tvbuff_t *tvb _U_, int offset, packet_info *pinfo _U_, proto_tree *tree _U_) { return offset; } static const value_string t30_control_vals[] = { { 0xC0, "non-final frames within the procedure" }, { 0xC8, "final frames within the procedure" }, { 0, NULL } }; #define T30_FC_DIS 0x01 #define T30_FC_CSI 0x02 #define T30_FC_NSF 0x04 #define T30_FC_DTC 0x81 #define T30_FC_CIG 0x82 #define T30_FC_NSC 0x84 #define T30_FC_PWD 0x83 #define T30_FC_SEP 0x85 #define T30_FC_PSA 0x86 #define T30_FC_CIA 0x87 #define T30_FC_ISP 0x88 #define T30_FC_DCS 0x41 #define T30_FC_TSI 0x42 #define T30_FC_NSS 0x44 #define T30_FC_SUB 0x43 #define T30_FC_SID 0x45 #define T30_FC_TSA 0x46 #define T30_FC_IRA 0x47 #define T30_FC_CFR 0x21 #define T30_FC_FTT 0x22 #define T30_FC_CSA 0x24 #define T30_FC_EOM 0x71 #define T30_FC_MPS 0x72 #define T30_FC_EOP 0x74 #define T30_FC_PRI_EOM 0x79 #define T30_FC_PRI_MPS 0x7A #define T30_FC_PRI_EOP 0x7C #define T30_FC_PRI_EOP2 0x78 #define T30_FC_MCF 0x31 #define T30_FC_RTP 0x33 #define T30_FC_RTN 0x32 #define T30_FC_PIP 0x35 #define T30_FC_PIN 0x34 #define T30_FC_FDM 0x3F #define T30_FC_DCN 0x5F #define T30_FC_CRP 0x58 #define T30_FC_FNV 0x53 #define T30_FC_TNR 0x57 #define T30_FC_TR 0x56 #define T30_FC_MCF 0x31 #define T30_FC_PID 0x36 #define T30_FC_PPR 0x3D #define T30_FC_RNR 0x37 #define T30_FC_CRP 0x58 #define T30_FC_CTC 0x48 #define T30_FC_CTR 0x23 #define T30_FC_PPS 0x7D #define T30_FC_EOR 0x73 #define T30_FC_RR 0x76 #define T30_FC_ERR 0x38 #define T30_FC_FCD 0x60 #define T30_FC_RCP 0x61 const value_string t30_facsimile_control_field_vals[] = { { T30_FC_DIS, "Digital Identification Signal" }, { T30_FC_CSI, "Called Subscriber Identification" }, { T30_FC_NSF, "Non-Standard Facilities" }, { T30_FC_DTC, "Digital Transmit Command" }, { T30_FC_CIG, "Calling Subscriber Identification" }, { T30_FC_NSC, "Non-Standard facilities Command" }, { T30_FC_PWD, "Password" }, { T30_FC_SEP, "Selective Polling" }, { T30_FC_PSA, "Polled Subaddress" }, { T30_FC_CIA, "Calling subscriber Internet Address" }, { T30_FC_ISP, "Internet Selective Polling Address" }, { T30_FC_DCS, "Digital Command Signal" }, { T30_FC_TSI, "Transmitting Subscriber Identification" }, { T30_FC_NSS, "Non-Standard facilities Set-up" }, { T30_FC_SUB, "Subaddress" }, { T30_FC_SID, "Sender Identification" }, { T30_FC_TSA, "Transmitting Subscriber Internet address" }, { T30_FC_IRA, "Internet Routing Address" }, { T30_FC_CFR, "Confirmation To Receive" }, { T30_FC_FTT, "Failure To Train" }, { T30_FC_CSA, "Called Subscriber Internet Address" }, { T30_FC_EOM, "End Of Message" }, { T30_FC_MPS, "MultiPage Signal" }, { T30_FC_EOP, "End Of Procedure" }, { T30_FC_PRI_EOM, "Procedure Interrupt-End Of Message" }, { T30_FC_PRI_MPS, "Procedure Interrupt-MultiPage Signal" }, { T30_FC_PRI_EOP, "Procedure Interrupt-End Of Procedure" }, { T30_FC_PRI_EOP2, "Procedure Interrupt-End Of Procedure" }, { T30_FC_MCF, "Message Confirmation" }, { T30_FC_RTP, "Retrain Positive" }, { T30_FC_RTN, "Retrain Negative" }, { T30_FC_PIP, "Procedure Interrupt Positive" }, { T30_FC_PIN, "Procedure Interrupt Negative" }, { T30_FC_FDM, "File Diagnostics Message" }, { T30_FC_DCN, "Disconnect" }, { T30_FC_CRP, "Command Repeat" }, { T30_FC_FNV, "Field Not Valid" }, { T30_FC_TNR, "Transmit not ready" }, { T30_FC_TR, "Transmit ready" }, { T30_FC_MCF, "Message Confirmation" }, { T30_FC_PID, "Procedure Interrupt Disconnect" }, { T30_FC_PPR, "Partial Page Request" }, { T30_FC_RNR, "Receive Not Ready" }, { T30_FC_CRP, "Command Repeat" }, { T30_FC_CTC, "Continue To Correct" }, { T30_FC_CTR, "Response for Continue To Correct" }, { T30_FC_PPS, "Partial Page Signal" }, { T30_FC_EOR, "End Of Retransmission" }, { T30_FC_RR, "Receive Ready" }, { T30_FC_ERR, "Response for End of Retransmission" }, { T30_FC_FCD, "Facsimile coded data" }, { T30_FC_RCP, "Return to control for partial page" }, { 0, NULL } }; const value_string t30_facsimile_control_field_vals_short[] = { { T30_FC_DIS, "DIS" }, { T30_FC_CSI, "CSI" }, { T30_FC_NSF, "NSF" }, { T30_FC_DTC, "DTC" }, { T30_FC_CIG, "CIG" }, { T30_FC_NSC, "NSC" }, { T30_FC_PWD, "PWD" }, { T30_FC_SEP, "SEP" }, { T30_FC_PSA, "PSA" }, { T30_FC_CIA, "CIA" }, { T30_FC_ISP, "ISP" }, { T30_FC_DCS, "DCS" }, { T30_FC_TSI, "TSI" }, { T30_FC_NSS, "NSS" }, { T30_FC_SUB, "SUB" }, { T30_FC_SID, "SID" }, { T30_FC_TSA, "TSA" }, { T30_FC_IRA, "IRA" }, { T30_FC_CFR, "CFR" }, { T30_FC_FTT, "FTT" }, { T30_FC_CSA, "CSA" }, { T30_FC_EOM, "EOM" }, { T30_FC_MPS, "MPS" }, { T30_FC_EOP, "EOP" }, { T30_FC_PRI_EOM, "PRI_EOM" }, { T30_FC_PRI_MPS, "PRI_MPS" }, { T30_FC_PRI_EOP, "EOP" }, { T30_FC_PRI_EOP2, "EOP2" }, { T30_FC_MCF, "MCF" }, { T30_FC_RTP, "RTP" }, { T30_FC_RTN, "RTN" }, { T30_FC_PIP, "PIP" }, { T30_FC_PIN, "PIN" }, { T30_FC_FDM, "FDM" }, { T30_FC_DCN, "DCN" }, { T30_FC_CRP, "CRP" }, { T30_FC_FNV, "FNV" }, { T30_FC_TNR, "TNR" }, { T30_FC_TR, "TR" }, { T30_FC_MCF, "MCF" }, { T30_FC_PID, "PID" }, { T30_FC_PPR, "PPR" }, { T30_FC_RNR, "RNR" }, { T30_FC_CRP, "CRP" }, { T30_FC_CTC, "CTC" }, { T30_FC_CTR, "CTR" }, { T30_FC_PPS, "PPS" }, { T30_FC_EOR, "EOR" }, { T30_FC_RR, "RR" }, { T30_FC_ERR, "ERR" }, { T30_FC_FCD, "FCD" }, { T30_FC_RCP, "RCP" }, { 0, NULL } }; static const value_string t30_data_signalling_rate_vals[] = { { 0x00, "ITU-T V.27 ter fall-back mode" }, { 0x04, "ITU-T V.27 ter" }, { 0x08, "ITU-T V.29" }, { 0x0C, "ITU-T V.27 ter and V.29" }, { 0x02, "Not used" }, { 0x06, "Reserved" }, { 0x0A, "Not used" }, { 0x0E, "Invalid" }, { 0x01, "Not used" }, { 0x05, "Reserved" }, { 0x09, "Not used" }, { 0x0D, "ITU-T V.27 ter, V.29, and V.17" }, { 0x03, "Not used" }, { 0x07, "Reserved" }, { 0x0B, "Not used" }, { 0x0F, "Reserved" }, }; static const value_string t30_data_signalling_rate_dcs_vals[] = { { 0x00, "2400 bit/s, ITU-T V.27 ter" }, { 0x04, "4800 bit/s, ITU-T V.27 ter" }, { 0x08, "9600 bit/s, ITU-T V.29" }, { 0x0C, "7200 bit/s, ITU-T V.29" }, { 0x02, "Invalid" }, { 0x06, "Invalid" }, { 0x0A, "Reserved" }, { 0x0E, "Reserved" }, { 0x01, "14 400 bit/s, ITU-T V.17" }, { 0x05, "12 000 bit/s, ITU-T V.17" }, { 0x09, "9600 bit/s, ITU-T V.17" }, { 0x0D, "7200 bit/s, ITU-T V.17" }, { 0x03, "Reserved" }, { 0x07, "Reserved" }, { 0x0B, "Reserved" }, { 0x0F, "Reserved" }, }; static const value_string t30_recording_width_capabilities_vals[] = { { 0x00, "Scan line length 215 mm +- 1%" }, { 0x01, "Scan line length 215 mm +- 1% and Scan line length 255 mm +- 1% and Scan line length 303 mm +- 1%" }, { 0x02, "Scan line length 215 mm +- 1% and Scan line length 255 mm +- 1%" }, { 0x03, "Invalid" }, }; static const value_string t30_recording_width_dcs_vals[] = { { 0x00, "Scan line length 215 mm +- 1%" }, { 0x01, "Scan line length 303 mm +- 1%" }, { 0x02, "Scan line length 255 mm +- 1%" }, { 0x03, "Invalid" }, }; static const value_string t30_recording_length_capability_vals[] = { { 0x00, "A4 (297 mm)" }, { 0x01, "Unlimited" }, { 0x02, "A4 (297 mm) and B4 (364 mm)" }, { 0x03, "Invalid" }, }; static const value_string t30_recording_length_dcs_vals[] = { { 0x00, "A4 (297 mm)" }, { 0x01, "Unlimited" }, { 0x02, "B4 (364 mm)" }, { 0x03, "Invalid" }, }; static const value_string t30_minimum_scan_line_time_rec_vals[] = { { 0x00, "20 ms at 3.85 l/mm: T7.7 = T3.85" }, { 0x01, "40 ms at 3.85 l/mm: T7.7 = T3.85" }, { 0x02, "10 ms at 3.85 l/mm: T7.7 = T3.85" }, { 0x04, "05 ms at 3.85 l/mm: T7.7 = T3.85" }, { 0x03, "10 ms at 3.85 l/mm: T7.7 = 1/2 T3.85" }, { 0x06, "20 ms at 3.85 l/mm: T7.7 = 1/2 T3.85" }, { 0x05, "40 ms at 3.85 l/mm: T7.7 = 1/2 T3.85" }, { 0x07, "00 ms at 3.85 l/mm: T7.7 = T3.85" }, }; static const value_string t30_partial_page_fcf2_vals[] = { { 0x00, "NULL code which indicates the partial page boundary" }, { 0xF1, "EOM in optional T.4 error correction mode" }, { 0xF2, "MPS in optional T.4 error correction mode" }, { 0xF4, "EOP in optional T.4 error correction mode" }, { 0xF8, "EOS in optional T.4 error correction mode" }, { 0xF9, "PRI-EOM in optional T.4 error correction mode" }, { 0xFA, "PRI-MPS in optional T.4 error correction mode" }, { 0xFC, "PRI-EOP in optional T.4 error correction mode" }, }; static const value_string t30_minimum_scan_line_time_dcs_vals[] = { { 0x00, "20 ms" }, { 0x01, "40 ms" }, { 0x02, "10 ms" }, { 0x04, "05 ms" }, { 0x07, "00 ms" }, }; static const value_string t30_SharedDataMemory_capacity_vals[] = { { 0x00, "Not available" }, { 0x01, "Level 1 = 1.0 Mbytes" }, { 0x02, "Level 2 = 2.0 Mbytes" }, { 0x03, "Level 3 = unlimited (i.e. >= 32 Mbytes)" }, }; static const true_false_string t30_octets_preferred_value = { "64 octets preferred", "256 octets preferred", }; static const true_false_string t30_extension_ind_value = { "information continues through the next octet", "last octet", }; static const true_false_string t30_compress_value = { "Uncompressed mode", "Compressed mode", }; static const true_false_string t30_minimum_scan_value = { "T15.4 = 1/2 T7.7", "T15.4 = T7.7", }; static const true_false_string t30_duplex_operation_value = { "Duplex and half duplex operation", "Half duplex operation only", }; static const true_false_string t30_frame_size_dcs_value = { "64 octets", "256 octets", }; static const true_false_string t30_res_type_sel_value = { "inch based resolution", "metric based resolution", }; guint8 reverse_byte(guint8 val) { return ( ((val & 0x80)>>7) | ((val & 0x40)>>5) | ((val & 0x20)>>3) | ((val & 0x10)>>1) | ((val & 0x08)<<1) | ((val & 0x04)<<3) | ((val & 0x02)<<5) | ((val & 0x01)<<7) ); } #define LENGTH_T30_NUM 20 gchar * t30_get_string_numbers(tvbuff_t *tvb, int offset, int len) { gchar *buf; int i; /* the lenght must be 20 bytes per T30 rec*/ if (len != LENGTH_T30_NUM) return NULL; buf=ep_alloc(LENGTH_T30_NUM+1); for (i=0; icinfo, COL_INFO)) col_append_fstr(pinfo->cinfo, COL_INFO, " - Number:%s", str_num ); g_snprintf(t38_info->desc, MAX_T38_DESC, "Num: %s", str_num); } else { proto_tree_add_text(tree, tvb, offset, tvb_reported_length_remaining(tvb, offset), "[MALFORMED OR SHORT PACKET: number of digits must be 20]"); if (check_col(pinfo->cinfo, COL_INFO)) col_append_str(pinfo->cinfo, COL_INFO, " [MALFORMED OR SHORT PACKET: number of digits must be 20]" ); } } static void dissect_t30_facsimile_coded_data(tvbuff_t *tvb, int offset, packet_info *pinfo, int len, proto_tree *tree) { guint8 octet; gchar *t4_data; if (len < 2) { proto_tree_add_text(tree, tvb, offset, tvb_reported_length_remaining(tvb, offset), "[MALFORMED OR SHORT PACKET: FCD length must be at least 2 bytes]"); expert_add_info_format(pinfo, NULL, PI_MALFORMED, PI_ERROR, "T30 FCD length must be at least 2 bytes"); if (check_col(pinfo->cinfo, COL_INFO)) col_append_str(pinfo->cinfo, COL_INFO, " [MALFORMED OR SHORT PACKET]"); return; } octet = tvb_get_guint8(tvb, offset); proto_tree_add_uint(tree, hf_t30_t4_frame_num, tvb, offset, 1, reverse_byte(octet)); offset++; if (check_col(pinfo->cinfo, COL_INFO)) col_append_fstr(pinfo->cinfo, COL_INFO, " - Frame num:%d", reverse_byte(octet)); g_snprintf(t38_info->desc, MAX_T38_DESC, "Frm num: %d", reverse_byte(octet)); t4_data = ep_alloc(len-1); tvb_memcpy(tvb, t4_data, offset, len-1); proto_tree_add_bytes(tree, hf_t30_t4_data, tvb, offset, len-1, t4_data); } static void dissect_t30_non_standard_cap(tvbuff_t *tvb, int offset, packet_info *pinfo, int len, proto_tree *tree) { guint8 octet; gchar *non_standard_bytes; if (len < 2) { proto_tree_add_text(tree, tvb, offset, tvb_reported_length_remaining(tvb, offset), "[MALFORMED OR SHORT PACKET: NSC length must be at least 2 bytes]"); expert_add_info_format(pinfo, NULL, PI_MALFORMED, PI_ERROR, "T30 NSC length must be at least 2 bytes"); if (check_col(pinfo->cinfo, COL_INFO)) col_append_str(pinfo->cinfo, COL_INFO, " [MALFORMED OR SHORT PACKET]"); return; } octet = tvb_get_guint8(tvb, offset); proto_tree_add_uint(tree, hf_t30_fif_country_code, tvb, offset, 1, octet); offset++; non_standard_bytes = ep_alloc(len-1); tvb_memcpy(tvb, non_standard_bytes, offset, len-1); proto_tree_add_bytes(tree, hf_t30_fif_non_stand_bytes, tvb, offset, len-1, non_standard_bytes); } static void dissect_t30_partial_page_signal(tvbuff_t *tvb, int offset, packet_info *pinfo, int len, proto_tree *tree) { guint8 octet, page_count, block_count, frame_count; if (len != 4) { proto_tree_add_text(tree, tvb, offset, tvb_reported_length_remaining(tvb, offset), "[MALFORMED OR SHORT PACKET: PPS length must be 4 bytes]"); expert_add_info_format(pinfo, NULL, PI_MALFORMED, PI_ERROR, "T30 PPS length must be 4 bytes"); if (check_col(pinfo->cinfo, COL_INFO)) col_append_str(pinfo->cinfo, COL_INFO, " [MALFORMED OR SHORT PACKET]"); return; } octet = tvb_get_guint8(tvb, offset); proto_tree_add_uint(tree, hf_t30_partial_page_fcf2, tvb, offset, 1, octet); offset += 1; octet = tvb_get_guint8(tvb, offset); page_count = reverse_byte(octet); proto_tree_add_uint(tree, hf_t30_partial_page_i1, tvb, offset, 1, page_count); offset++; octet = tvb_get_guint8(tvb, offset); block_count = reverse_byte(octet); proto_tree_add_uint(tree, hf_t30_partial_page_i2, tvb, offset, 1, block_count); offset++; octet = tvb_get_guint8(tvb, offset); frame_count = reverse_byte(octet); proto_tree_add_uint(tree, hf_t30_partial_page_i3, tvb, offset, 1, frame_count); offset++; if (check_col(pinfo->cinfo, COL_INFO)) col_append_fstr(pinfo->cinfo, COL_INFO, " - PC:%d BC:%d FC:%d", page_count, block_count, frame_count); g_snprintf(t38_info->desc, MAX_T38_DESC, "PC:%d BC:%d FC:%d", page_count, block_count, frame_count); } static void dissect_t30_dis_dtc(tvbuff_t *tvb, int offset, packet_info *pinfo, int len, proto_tree *tree, gboolean dis_dtc) { guint8 octet; if (len < 3) { proto_tree_add_text(tree, tvb, offset, tvb_reported_length_remaining(tvb, offset), "[MALFORMED OR SHORT PACKET: DIS length must be at least 4 bytes]"); expert_add_info_format(pinfo, NULL, PI_MALFORMED, PI_ERROR, "T30 DIS length must be at least 4 bytes"); if (check_col(pinfo->cinfo, COL_INFO)) col_append_str(pinfo->cinfo, COL_INFO, " [MALFORMED OR SHORT PACKET]"); return; } /* bits 1 to 8 */ octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_sm, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_rtif, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_3gmn, tvb, offset, 1, octet); if (dis_dtc) { proto_tree_add_boolean(tree, hf_t30_fif_v8c, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_op, tvb, offset, 1, octet); } /* bits 9 to 16 */ offset += 1; octet = tvb_get_guint8(tvb, offset); if (dis_dtc) proto_tree_add_boolean(tree, hf_t30_fif_rtfc, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_rfo, tvb, offset, 1, octet); if (dis_dtc) { proto_tree_add_uint(tree, hf_t30_fif_dsr, tvb, offset, 1, octet); if (check_col(pinfo->cinfo, COL_INFO)) col_append_fstr(pinfo->cinfo, COL_INFO, " - DSR:%s", val_to_str((octet&0x3C) >> 2, t30_data_signalling_rate_vals, "")); g_snprintf(t38_info->desc, MAX_T38_DESC, "DSR:%s", val_to_str((octet&0x3C) >> 2, t30_data_signalling_rate_vals, "")); } else { proto_tree_add_uint(tree, hf_t30_fif_dsr_dcs, tvb, offset, 1, octet); if (check_col(pinfo->cinfo, COL_INFO)) col_append_fstr(pinfo->cinfo, COL_INFO, " - DSR:%s", val_to_str((octet&0x3C) >> 2, t30_data_signalling_rate_dcs_vals, "")); g_snprintf(t38_info->desc, MAX_T38_DESC, "DSR:%s", val_to_str((octet&0x3C) >> 2, t30_data_signalling_rate_dcs_vals, "")); } proto_tree_add_boolean(tree, hf_t30_fif_res, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_tdcc, tvb, offset, 1, octet); /* bits 17 to 24 */ offset += 1; octet = tvb_get_guint8(tvb, offset); if (dis_dtc) { proto_tree_add_uint(tree, hf_t30_fif_rwc, tvb, offset, 1, octet); proto_tree_add_uint(tree, hf_t30_fif_rlc, tvb, offset, 1, octet); proto_tree_add_uint(tree, hf_t30_fif_msltcr, tvb, offset, 1, octet); } else { proto_tree_add_uint(tree, hf_t30_fif_rw_dcs, tvb, offset, 1, octet); proto_tree_add_uint(tree, hf_t30_fif_rl_dcs, tvb, offset, 1, octet); proto_tree_add_uint(tree, hf_t30_fif_mslt_dcs, tvb, offset, 1, octet); } proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) || (len < 4) ) return; /* no extension */ /* bits 25 to 32 */ offset += 1; octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_cm, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ecm, tvb, offset, 1, octet); if (!dis_dtc) proto_tree_add_boolean(tree, hf_t30_fif_fs_dcs, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_t6, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) || (len < 5) ) return; /* no extension */ /* bits 33 to 40 */ offset += 1; octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_fvc, tvb, offset, 1, octet); if (dis_dtc) { proto_tree_add_boolean(tree, hf_t30_fif_mspc, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ps, tvb, offset, 1, octet); } proto_tree_add_boolean(tree, hf_t30_fif_t43, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_pi, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_vc32k, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) || (len < 6) ) return; /* no extension */ /* bits 41 to 48 */ offset += 1; octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_r8x15, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_300x300, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_r16x15, tvb, offset, 1, octet); if (dis_dtc) { proto_tree_add_boolean(tree, hf_t30_fif_ibrp, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_mbrp, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_msltchr, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_sp, tvb, offset, 1, octet); } else { proto_tree_add_boolean(tree, hf_t30_fif_rts, tvb, offset, 1, octet); } proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) || (len < 7) ) return; /* no extension */ /* bits 49 to 56 */ offset += 1; octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_sc, tvb, offset, 1, octet); if (dis_dtc) { proto_tree_add_boolean(tree, hf_t30_fif_passw, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_rttd, tvb, offset, 1, octet); } else { proto_tree_add_boolean(tree, hf_t30_fif_sit, tvb, offset, 1, octet); } proto_tree_add_boolean(tree, hf_t30_fif_bft, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_dtm, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_edi, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) || (len < 8) ) return; /* no extension */ /* bits 57 to 64 */ offset += 1; octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_btm, tvb, offset, 1, octet); if (dis_dtc) proto_tree_add_boolean(tree, hf_t30_fif_rttcmmd, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_chrm, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_mm, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) || (len < 9) ) return; /* no extension */ /* bits 65 to 72 */ offset += 1; octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_pm26, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_dnc, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_do, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_jpeg, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_fcm, tvb, offset, 1, octet); if (!dis_dtc) proto_tree_add_boolean(tree, hf_t30_fif_pht, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_12c, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) || (len < 10) ) return; /* no extension */ /* bits 73 to 80 */ offset += 1; octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_ns, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ci, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_cgr, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_nalet, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_naleg, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_spscb, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_spsco, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) || (len < 11) ) return; /* no extension */ /* bits 81 to 88 */ offset += 1; octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_hkm, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_rsa, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_oc, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_hfx40, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_acn2c, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_acn3c, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_hfx40i, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) || (len < 12) ) return; /* no extension */ /* bits 89 to 96 */ offset += 1; octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_ahsn2, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ahsn3, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_t441, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_t442, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_t443, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_plmss, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) || (len < 13) ) return; /* no extension */ /* bits 97 to 104 */ offset += 1; octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_cg300, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_100x100cg, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_spcbft, tvb, offset, 1, octet); if (dis_dtc) { proto_tree_add_boolean(tree, hf_t30_fif_ebft, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_isp, tvb, offset, 1, octet); } proto_tree_add_boolean(tree, hf_t30_fif_ira, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) || (len < 14) ) return; /* no extension */ /* bits 105 to 112 */ offset += 1; octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_600x600, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_1200x1200, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_300x600, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_400x800, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_600x1200, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_cg600x600, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_cg1200x1200, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) || (len < 15) ) return; /* no extension */ /* bits 113 to 120 */ offset += 1; octet = tvb_get_guint8(tvb, offset); proto_tree_add_boolean(tree, hf_t30_fif_dspcam, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_dspccm, tvb, offset, 1, octet); if (dis_dtc) proto_tree_add_boolean(tree, hf_t30_fif_bwmrcp, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_t45, tvb, offset, 1, octet); proto_tree_add_uint(tree, hf_t30_fif_sdmc, tvb, offset, 1, octet); proto_tree_add_boolean(tree, hf_t30_fif_ext, tvb, offset, 1, octet); if ( !(octet & 0x01) ) return; /* no extension */ } static int dissect_t30_hdlc(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree) { proto_item *it; proto_tree *tr; proto_tree *tr_fif; proto_item *it_fcf; guint8 octet; guint32 frag_len; proto_item *item; if (tvb_reported_length_remaining(tvb, offset) < 3) { proto_tree_add_text(tree, tvb, offset, tvb_reported_length_remaining(tvb, offset), "[MALFORMED OR SHORT PACKET: hdlc T30 length must be at least 4 bytes]"); expert_add_info_format(pinfo, NULL, PI_MALFORMED, PI_ERROR, "T30 length must be at least 4 bytes"); if (check_col(pinfo->cinfo, COL_INFO)) col_append_str(pinfo->cinfo, COL_INFO, " (HDLC Reassembled: [MALFORMED OR SHORT PACKET])"); return offset; } /* if (tree) { proto_item *item;*/ if (check_col(pinfo->cinfo, COL_INFO)) col_append_str(pinfo->cinfo, COL_INFO, " (HDLC Reassembled:"); it=proto_tree_add_protocol_format(tree, proto_t30, tvb, offset, -1, "ITU-T Recommendation T.30"); tr=proto_item_add_subtree(it, ett_t30); octet = tvb_get_guint8(tvb, offset); item = proto_tree_add_uint(tr, hf_t30_Address, tvb, offset, 1, octet); if (octet != 0xFF) expert_add_info_format(pinfo, item, PI_REASSEMBLE, PI_WARN, "T30 Address must be 0xFF"); offset += 1; octet = tvb_get_guint8(tvb, offset); item = proto_tree_add_uint(tr, hf_t30_Control, tvb, offset, 1, octet); if ((octet != 0xC0) && (octet != 0xC8)) expert_add_info_format(pinfo, item, PI_REASSEMBLE, PI_WARN, "T30 Control Field must be 0xC0 or 0xC8"); offset += 1; octet = tvb_get_guint8(tvb, offset); it_fcf = proto_tree_add_uint(tr, hf_t30_Facsimile_Control, tvb, offset, 1, octet & 0x7F); offset += 1; tr_fif = proto_item_add_subtree(it_fcf, ett_t30_fif); frag_len = tvb_length_remaining(tvb, offset); t38_info->t30_Facsimile_Control = octet; if (check_col(pinfo->cinfo, COL_INFO)) col_append_fstr(pinfo->cinfo, COL_INFO, " %s - %s", val_to_str(octet & 0x7F, t30_facsimile_control_field_vals_short, ""), val_to_str(octet & 0x7F, t30_facsimile_control_field_vals, "") ); switch (octet & 0x7F) { case T30_FC_DIS: case T30_FC_DTC: dissect_t30_dis_dtc(tvb, offset, pinfo, frag_len, tr_fif, TRUE); break; case T30_FC_DCS: dissect_t30_dis_dtc(tvb, offset, pinfo, frag_len, tr_fif, FALSE); break; case T30_FC_CSI: case T30_FC_CIG: case T30_FC_TSI: case T30_FC_PWD: case T30_FC_SEP: case T30_FC_SUB: case T30_FC_SID: case T30_FC_PSA: dissect_t30_numbers(tvb, offset, pinfo, frag_len, tr_fif); break; case T30_FC_NSF: case T30_FC_NSC: case T30_FC_NSS: dissect_t30_non_standard_cap(tvb, offset, pinfo, frag_len, tr_fif); break; case T30_FC_FCD: dissect_t30_facsimile_coded_data(tvb, offset, pinfo, frag_len, tr_fif); break; case T30_FC_PPS: dissect_t30_partial_page_signal(tvb, offset, pinfo, frag_len, tr_fif); break; } if (check_col(pinfo->cinfo, COL_INFO)) col_append_str(pinfo->cinfo, COL_INFO, ")"); /* }*/ return offset; } /* T38 Routines */ static int dissect_t38_NULL(tvbuff_t *tvb _U_, int offset, asn_ctx_t *actx _U_, proto_tree *tree _U_) { return offset; } static const per_choice_t t30_indicator_choice[] = { { 0, "no-signal", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 1, "cng", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 2, "ced", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 3, "v21-preamble", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 4, "v27-2400-training", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 5, "v27-4800-training", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 6, "v29-7200-training", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 7, "v29-9600-training", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 8, "v17-7200-short-training", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 9, "v17-7200-long-training", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 10, "v17-9600-short-training", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 11, "v17-9600-long-training", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 12, "v17-12000-short-training", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 13, "v17-12000-long-training", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 14, "v17-14400-short-training", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 15, "v17-14400-long-training", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 16, "v8-ansam", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 17, "v8-signal", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 18, "v34-cntl-channel-1200", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 19, "v34-pri-channel", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 20, "v34-CC-retrain", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 21, "v33-12000-training", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 22, "v33-14400-training", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 0, NULL, 0, NULL } }; const value_string 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, int offset, asn_ctx_t *actx, proto_tree *tree) { offset=dissect_per_choice(tvb, offset, actx, tree, hf_t38_t30_indicator, ett_t38_t30_indicator, t30_indicator_choice, &T30ind_value); if (check_col(actx->pinfo->cinfo, COL_INFO) && primary_part){ col_append_fstr(actx->pinfo->cinfo, COL_INFO, " t30ind: %s", val_to_str(T30ind_value,t30_indicator_vals,"")); } /* info for tap */ if (primary_part) t38_info->t30ind_value = T30ind_value; return offset; } static const per_choice_t data_choice[] = { { 0, "v21", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 1, "v27-2400", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 2, "v27-4800", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 3, "v29-7200", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 4, "v29-9600", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 5, "v17-7200", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 6, "v17-9600", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 7, "v17-12000", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 8, "v17-14400", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 9, "v8", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 10, "v34-pri-rate", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 11, "v34-CC-1200", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 12, "v34-pri-ch", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 13, "v33-12000", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 14, "v33-14400", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 0, NULL, 0, NULL } }; const value_string 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_data(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { offset=dissect_per_choice(tvb, offset, actx, tree, hf_t38_data, ett_t38_data, data_choice, &Data_value); if (check_col(actx->pinfo->cinfo, COL_INFO) && primary_part){ col_append_fstr(actx->pinfo->cinfo, COL_INFO, " data:%s:", val_to_str(Data_value,t30_data_vals,"")); } /* info for tap */ if (primary_part) t38_info->data_value = Data_value; return offset; } static const per_choice_t Type_of_msg_choice[] = { { 0, "t30-indicator", ASN1_NO_EXTENSIONS, dissect_t38_t30_indicator}, { 1, "data", ASN1_NO_EXTENSIONS, dissect_t38_data}, { 0, NULL, 0, NULL } }; static const value_string Type_of_msg_vals[] = { { 0, "t30-indicator" }, { 1, "data" }, { 0, NULL} }; static int dissect_t38_Type_of_msg(tvbuff_t *tvb, int offset, asn_ctx_t *actx _U_, proto_tree *tree, int hf_index) { offset = dissect_per_choice(tvb, offset, actx, tree, hf_index, ett_t38_Type_of_msg, Type_of_msg_choice, &Type_of_msg_value); /* info for tap */ if (primary_part) t38_info->type_msg = Type_of_msg_value; return offset; } static int dissect_type_of_msg(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { return dissect_t38_Type_of_msg(tvb, offset, actx, tree, hf_t38_Type_of_msg); } static const per_choice_t Data_Field_field_type_PreCorrigendum_choice[] = { { 0, "hdlc-data", ASN1_NO_EXTENSIONS, dissect_t38_NULL}, { 1, "hdlc-sig-end", ASN1_NO_EXTENSIONS, dissect_t38_NULL}, { 2, "hdlc-fcs-OK", ASN1_NO_EXTENSIONS, dissect_t38_NULL}, { 3, "hdlc-fcs-BAD", ASN1_NO_EXTENSIONS, dissect_t38_NULL}, { 4, "hdlc-fcs-OK-sig-end", ASN1_NO_EXTENSIONS, dissect_t38_NULL}, { 5, "hdlc-fcs-BAD-sig-end", ASN1_NO_EXTENSIONS, dissect_t38_NULL}, { 6, "t4-non-ecm-data", ASN1_NO_EXTENSIONS, dissect_t38_NULL}, { 7, "t4-non-ecm-sig-end", ASN1_NO_EXTENSIONS, dissect_t38_NULL}, { 0, NULL, 0, NULL } }; static const per_choice_t Data_Field_field_type_choice[] = { { 0, "hdlc-data", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 1, "hdlc-sig-end", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 2, "hdlc-fcs-OK", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 3, "hdlc-fcs-BAD", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 4, "hdlc-fcs-OK-sig-end", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 5, "hdlc-fcs-BAD-sig-end", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 6, "t4-non-ecm-data", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 7, "t4-non-ecm-sig-end", ASN1_EXTENSION_ROOT, dissect_t38_NULL}, { 8, "cm-message", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 9, "jm-message", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 10, "ci-message", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 11, "v34-rate", ASN1_NOT_EXTENSION_ROOT, dissect_t38_NULL}, { 0, NULL, 0, NULL } }; static const value_string Data_Field_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, "v34-rate" }, { 0, NULL }, }; fragment_data * force_reassmeble_seq(tvbuff_t *tvb, int offset, packet_info *pinfo, guint32 id, GHashTable *fragment_table, guint32 frag_number) { fragment_key key; fragment_data *fd_head; fragment_data *fd_i; fragment_data *last_fd; guint32 dfpos, size, packet_lost, burst_lost, seq_num; /* create key to search hash with */ key.src = pinfo->src; key.dst = pinfo->dst; key.id = id; fd_head = g_hash_table_lookup(fragment_table, &key); /* 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; } fd_head->data = g_malloc(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){ memcpy(fd_head->data+dfpos,fd_i->data,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->datalen) || memcmp(last_fd->data, fd_i->data, 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->data){ g_free(fd_i->data); fd_i->data=NULL; } } /* mark this packet as defragmented */ fd_head->flags |= FD_DEFRAGMENTED; fd_head->reassembled_in=pinfo->fd->num; if (check_col(pinfo->cinfo, COL_INFO)) 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; } static int dissect_t38_Data_Field_field_type(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { if(use_pre_corrigendum_asn1_specification){ offset=dissect_per_choice(tvb, offset, actx, tree, hf_t38_Data_Field_field_type, ett_t38_Data_Field_field_type, Data_Field_field_type_PreCorrigendum_choice, &Data_Field_field_type_value); } else{ offset=dissect_per_choice(tvb, offset, actx, tree, hf_t38_Data_Field_field_type, ett_t38_Data_Field_field_type, Data_Field_field_type_choice, &Data_Field_field_type_value); } if (check_col(actx->pinfo->cinfo, COL_INFO) && primary_part){ col_append_fstr(actx->pinfo->cinfo, COL_INFO, " %s", val_to_str(Data_Field_field_type_value,Data_Field_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_data *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(tvb, offset, actx->pinfo, p_t38_packet_conv_info->reass_ID, /* ID for fragments belonging together */ data_fragment_table, /* list of message fragments */ seq_number + Data_Field_item_num - (guint32)p_t38_packet_conv_info->reass_start_seqnum, /* fragment sequence number */ /*0,*/ 0, /* fragment length */ FALSE); /* More fragments */ 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_reassmeble_seq(tvb, offset, actx->pinfo, p_t38_packet_conv_info->reass_ID, /* ID for fragments belonging together */ data_fragment_table, /* list of message fragments */ seq_number + Data_Field_item_num - (guint32)p_t38_packet_conv_info->reass_start_seqnum); /* fragment sequence number */ } else { if (check_col(actx->pinfo->cinfo, COL_INFO)) 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"); } new_tvb = process_reassembled_data(tvb, offset, actx->pinfo, "Reassembled Message", 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 Message", frag_msg, &data_frag_items, NULL, tree); /* Now reset fragmentation information in pinfo */ actx->pinfo->fragmented = save_fragmented; if (new_tvb) dissect_t30_hdlc(new_tvb, 0, actx->pinfo, tree); } } else { if(tree){ proto_tree_add_text(tree, tvb, offset, tvb_reported_length_remaining(tvb, offset), "[RECEIVED END OF FRAGMENT W/OUT ANY FRAGMENT DATA]"); } if (check_col(actx->pinfo->cinfo, COL_INFO)){ col_append_fstr(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; } t38_info->Data_Field_field_type_value = Data_Field_field_type_value; } return offset; } static int dissect_t38_Data_Field_field_data(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { tvbuff_t *value_tvb = NULL; guint32 value_len; offset=dissect_per_octet_string(tvb, offset, actx, tree, hf_t38_Data_Field_field_data, 1, 65535, &value_tvb); value_len = tvb_length(value_tvb); if (check_col(actx->pinfo->cinfo, COL_INFO) && primary_part){ if(value_len < 8){ col_append_fstr(actx->pinfo->cinfo, COL_INFO, "[%s]", tvb_bytes_to_str(value_tvb,0,value_len)); } else { col_append_fstr(actx->pinfo->cinfo, COL_INFO, "[%s...]", tvb_bytes_to_str(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)) { tvbuff_t* new_tvb = NULL; fragment_data *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->fd->num; p_t38_conv_info->reass_start_seqnum = seq_number; p_t38_conv_info->time_first_t4_data = nstime_to_sec(&actx->pinfo->fd->rel_ts); 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->time_first_t4_data = p_t38_conv_info->time_first_t4_data; } frag_msg = fragment_add_seq(value_tvb, 0, actx->pinfo, p_t38_packet_conv_info->reass_ID, /* ID for fragments belonging together */ data_fragment_table, /* list of message fragments */ seq_number - (guint32)p_t38_packet_conv_info->reass_start_seqnum, /* fragment sequence number */ value_len, /* fragment length */ TRUE); /* More fragments */ new_tvb = process_reassembled_data(tvb, offset, actx->pinfo, "Reassembled Message", frag_msg, &data_frag_items, NULL, tree); if (!frag_msg) { /* Not last packet of reassembled */ if (Data_Field_field_type_value == 0) { if (check_col(actx->pinfo->cinfo, COL_INFO)) col_append_fstr(actx->pinfo->cinfo, COL_INFO," (HDLC fragment %u)", seq_number - (guint32)p_t38_packet_conv_info->reass_start_seqnum); } else { if (check_col(actx->pinfo->cinfo, COL_INFO)) 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[] = { { "field-type", ASN1_NO_EXTENSIONS, ASN1_NOT_OPTIONAL, dissect_t38_Data_Field_field_type }, { "field-data", ASN1_NO_EXTENSIONS, ASN1_OPTIONAL, dissect_t38_Data_Field_field_data }, { NULL, 0, 0, NULL } }; static int dissect_t38_Data_Field_item(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { offset=dissect_per_sequence(tvb, offset, actx, tree, hf_t38_Data_Field_item, ett_t38_Data_Field_item, Data_Field_item_sequence); if (primary_part) Data_Field_item_num++; return offset; } static const per_sequence_t t38_Data_Field_sequence_of[1] = { { "" , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_Data_Field_item }, }; static int dissect_t38_Data_Field(tvbuff_t *tvb, int offset, asn_ctx_t *actx _U_, proto_tree *tree, int hf_index) { offset = dissect_per_sequence_of(tvb, offset, actx, tree, hf_index, ett_t38_Data_Field, t38_Data_Field_sequence_of); return offset; } static int dissect_data_field(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { return dissect_t38_Data_Field(tvb, offset, actx, tree, hf_t38_Data_Field); } static const per_sequence_t IFPPacket_sequence[] = { { "type-of-msg" , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_type_of_msg }, { "data-field" , ASN1_NO_EXTENSIONS , ASN1_OPTIONAL , dissect_data_field }, { NULL, 0, 0, NULL } }; static int dissect_t38_IFPPacket(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { offset=dissect_per_sequence(tvb, offset, actx, tree, hf_t38_IFPPacket, ett_t38_IFPPacket, IFPPacket_sequence); return offset; } static int dissect_t38_seq_number(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { offset=dissect_per_constrained_integer(tvb, offset, actx, tree, hf_t38_seq_number, 0, 65535, &seq_number, FALSE); /* info for tap */ if (primary_part) t38_info->seq_num = seq_number; if (check_col(actx->pinfo->cinfo, COL_INFO)){ col_append_fstr(actx->pinfo->cinfo, COL_INFO, "Seq=%05u ",seq_number); } return offset; } static int dissect_t38_primary_ifp_packet(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { guint32 length; primary_part = TRUE; offset=dissect_per_length_determinant(tvb, offset, actx, tree, hf_t38_primary_ifp_packet_length, &length); offset=dissect_t38_IFPPacket(tvb, offset, actx, tree); /* if is a valid t38 packet, add to tap */ if (p_t38_packet_conv && (!actx->pinfo->in_error_pkt) && ((gint32) seq_number != p_t38_packet_conv_info->last_seqnum)) 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_secondary_ifp_packets_item(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { guint32 length; offset=dissect_per_length_determinant(tvb, offset, actx, tree, hf_t38_secondary_ifp_packets_item_length, &length); offset=dissect_t38_IFPPacket(tvb, offset, actx, tree); return offset; } static const per_sequence_t SEQUENCE_OF_t38_secondary_ifp_packets_sequence_of[1] = { { "" , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_secondary_ifp_packets_item }, }; static int dissect_t38_secondary_ifp_packets(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { /* When the field-data is not present, we MUST offset 1 byte*/ if((Data_Field_field_type_value != 0) && (Data_Field_field_type_value != 6) && (Data_Field_field_type_value != 7)) { offset=offset+8; } offset=dissect_per_sequence_of(tvb, offset, actx, tree, hf_t38_secondary_ifp_packets, ett_t38_secondary_ifp_packets, SEQUENCE_OF_t38_secondary_ifp_packets_sequence_of); return offset; } static int dissect_t38_fec_npackets(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { offset=dissect_per_integer(tvb, offset, actx, tree, hf_t38_fec_npackets, NULL); return offset; } static int dissect_t38_fec_data_item(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { offset=dissect_per_octet_string(tvb, offset, actx, tree, hf_t38_fec_data_item, NO_BOUND, NO_BOUND, NULL); return offset; } static const per_sequence_t T_t38_fec_data_sequence_of[1] = { { "" , ASN1_NO_EXTENSIONS , ASN1_NOT_OPTIONAL, dissect_t38_fec_data_item }, }; static int dissect_t38_fec_data(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { offset=dissect_per_sequence_of(tvb, offset, actx, tree, hf_t38_fec_data, ett_t38_fec_data, T_t38_fec_data_sequence_of); return offset; } static const per_sequence_t fec_info_sequence[] = { { "fec-npackets", ASN1_NO_EXTENSIONS, ASN1_NOT_OPTIONAL, dissect_t38_fec_npackets }, { "fec-data", ASN1_NO_EXTENSIONS, ASN1_NOT_OPTIONAL, dissect_t38_fec_data }, { NULL, 0, 0, NULL } }; static int dissect_t38_fec_info(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { offset=dissect_per_sequence(tvb, offset, actx, tree, hf_t38_fec_info, ett_t38_fec_info, fec_info_sequence); return offset; } static const per_choice_t error_recovery_choice[] = { { 0, "secondary-ifp-packets", ASN1_NO_EXTENSIONS, dissect_t38_secondary_ifp_packets}, { 1, "fec-info", ASN1_NO_EXTENSIONS, dissect_t38_fec_info}, { 0, NULL, 0, NULL } }; static const value_string error_recovery_vals[] = { { 0, "secondary-ifp-packets" }, { 1, "fec-info" }, { 0, NULL} }; static int dissect_t38_error_recovery(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { primary_part = FALSE; offset=dissect_per_choice(tvb, offset, actx, tree, hf_t38_error_recovery, ett_t38_error_recovery, error_recovery_choice, NULL); primary_part = TRUE; return offset; } static const per_sequence_t UDPTLPacket_sequence[] = { { "seq-number", ASN1_NO_EXTENSIONS, ASN1_NOT_OPTIONAL, dissect_t38_seq_number }, { "primary-ifp-packet", ASN1_NO_EXTENSIONS, ASN1_NOT_OPTIONAL, dissect_t38_primary_ifp_packet }, { "error-recovery", ASN1_NO_EXTENSIONS, ASN1_NOT_OPTIONAL, dissect_t38_error_recovery }, { NULL, 0, 0, NULL } }; static int dissect_t38_UDPTLPacket(tvbuff_t *tvb, int offset, asn_ctx_t *actx, proto_tree *tree) { /* Initialize to something else than data type */ Data_Field_field_type_value = 1; offset=dissect_per_sequence(tvb, offset, actx, tree, hf_t38_UDPTLPacket, ett_t38_UDPTLPacket, UDPTLPacket_sequence); return offset; } /* 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 = p_get_proto_data(pinfo->fd, proto_t38); /* find the conversation used for Reassemble and Setup Info */ p_conv = find_conversation(pinfo->fd->num, &pinfo->net_src, &pinfo->net_dst, pinfo->ptype, pinfo->srcport, pinfo->destport, NO_ADDR_B | NO_PORT_B); /* create a conv if it doen't exist */ if (!p_conv) { p_conv = conversation_new(pinfo->fd->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); } if (!p_t38_packet_conv) { p_t38_conv = conversation_get_proto_data(p_conv, proto_t38); /* create the conversation if it doen't exist */ if (!p_t38_conv) { p_t38_conv = se_alloc(sizeof(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->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; conversation_add_proto_data(p_conv, proto_t38, p_t38_conv); } /* copy the t38 conversation info to the packet t38 conversation */ p_t38_packet_conv = se_alloc(sizeof(t38_conv)); strcpy(p_t38_packet_conv->setup_method, p_t38_conv->setup_method); 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(pinfo->fd, proto_t38, 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 void dissect_t38_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { guint8 octet1; proto_item *it; proto_tree *tr; guint32 offset=0; asn_ctx_t asn_ctx; /* * 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){ call_dissector(rtp_handle,tvb,pinfo,tree); return; } } if (check_col(pinfo->cinfo, COL_PROTOCOL)){ col_set_str(pinfo->cinfo, COL_PROTOCOL, "T.38"); } if (check_col(pinfo->cinfo, COL_INFO)){ 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, pinfo, tr, p_conv, p_t38_packet_conv); } if (check_col(pinfo->cinfo, COL_INFO)){ col_append_fstr(pinfo->cinfo, COL_INFO, "UDP: UDPTLPacket "); } asn_ctx_init(&asn_ctx, ASN_ENC_PER, TRUE, pinfo); offset=dissect_t38_UDPTLPacket(tvb, offset, &asn_ctx, tr); if (offset&0x07){ offset=(offset&0xfffffff8)+8; } if (tvb_length_remaining(tvb,offset>>3)>0){ if (tr){ proto_tree_add_text(tr, tvb, offset, tvb_reported_length_remaining(tvb, offset), "[MALFORMED PACKET or wrong preference settings]"); } if (check_col(pinfo->cinfo, COL_INFO)){ col_append_fstr(pinfo->cinfo, COL_INFO, " [Malformed?]"); } } } static void dissect_t38_tcp_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { proto_item *it; proto_tree *tr; guint32 offset=0; guint16 ifp_packet_number=1; asn_ctx_t asn_ctx; if (check_col(pinfo->cinfo, COL_PROTOCOL)){ col_set_str(pinfo->cinfo, COL_PROTOCOL, "T.38"); } if (check_col(pinfo->cinfo, COL_INFO)){ 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, pinfo, tr, p_conv, p_t38_packet_conv); } if (check_col(pinfo->cinfo, COL_INFO)){ col_append_fstr(pinfo->cinfo, COL_INFO, "TCP: IFPPacket"); } while(tvb_length_remaining(tvb,offset>>3)>0) { asn_ctx_init(&asn_ctx, ASN_ENC_PER, TRUE, pinfo); offset=dissect_t38_IFPPacket(tvb, offset, &asn_ctx, tr); ifp_packet_number++; if(offset&0x07){ offset=(offset&0xfffffff8)+8; } if(tvb_length_remaining(tvb,offset>>3)>0){ if(t38_tpkt_usage == T38_TPKT_ALWAYS){ if(tr){ proto_tree_add_text(tr, tvb, offset, tvb_reported_length_remaining(tvb, offset), "[MALFORMED PACKET or wrong preference settings]"); } if (check_col(pinfo->cinfo, COL_INFO)){ col_append_fstr(pinfo->cinfo, COL_INFO, " [Malformed?]"); } break; } else { if (check_col(pinfo->cinfo, COL_INFO)){ col_append_fstr(pinfo->cinfo, COL_INFO, " IFPPacket#%u",ifp_packet_number); } } } } } static void dissect_t38_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { 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); } else { dissect_tpkt_encap(tvb,pinfo,tree,t38_tpkt_reassembly,t38_tcp_pdu_handle); } } static void dissect_t38(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { if(pinfo->ipproto == IP_PROTO_TCP) { dissect_t38_tcp(tvb, pinfo, tree); } else if(pinfo->ipproto == IP_PROTO_UDP) { dissect_t38_udp(tvb, pinfo, tree); } } /* Look for conversation info and display any setup info found */ void show_setup_info(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, conversation_t *p_conv, t38_conv *p_t38_conv) { proto_tree *t38_setup_tree; proto_item *ti; if (!p_t38_conv || p_t38_conv->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_conv->setup_method, p_t38_conv->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_conv->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_conv->setup_method); PROTO_ITEM_SET_GENERATED(item); } } /* Wireshark Protocol Registration */ void proto_register_t38(void) { static hf_register_info hf[] = { { &hf_t38_IFPPacket, { "IFPPacket", "t38.IFPPacket", FT_NONE, BASE_NONE, NULL, 0, "IFPPacket sequence", HFILL }}, { &hf_t38_Type_of_msg, { "Type of msg", "t38.Type_of_msg_type", FT_UINT32, BASE_DEC, VALS(Type_of_msg_vals), 0, "Type_of_msg choice", HFILL }}, { &hf_t38_t30_indicator, { "T30 indicator", "t38.t30_indicator", FT_UINT32, BASE_DEC, VALS(t30_indicator_vals), 0, "t30_indicator", HFILL }}, { &hf_t38_data, { "data", "t38.t38_data", FT_UINT32, BASE_DEC, VALS(t30_data_vals), 0, "data", HFILL }}, { &hf_t38_Data_Field, { "Data Field", "t38.Data_Field", FT_NONE, BASE_NONE, NULL, 0, "Data_Field sequence of", HFILL }}, { &hf_t38_Data_Field_item, { "Data_Field_item", "t38.Data_Field_item", FT_NONE, BASE_NONE, NULL, 0, "Data_Field_item sequence", HFILL }}, { &hf_t38_Data_Field_field_type, { "Data_Field_field_type", "t38.Data_Field_field_type", FT_UINT32, BASE_DEC, VALS(Data_Field_field_type_vals), 0, "Data_Field_field_type choice", HFILL }}, { &hf_t38_Data_Field_field_data, { "Data_Field_field_data", "t38.Data_Field_field_data", FT_BYTES, BASE_HEX, NULL, 0, "Data_Field_field_data octet string", HFILL }}, { &hf_t38_UDPTLPacket, { "UDPTLPacket", "t38.UDPTLPacket", FT_NONE, BASE_NONE, NULL, 0, "UDPTLPacket sequence", HFILL }}, { &hf_t38_seq_number, { "Sequence number", "t38.seq_number", FT_UINT32, BASE_DEC, NULL, 0, "seq_number", HFILL }}, { &hf_t38_primary_ifp_packet, { "Primary IFPPacket", "t38.primary_ifp_packet", FT_BYTES, BASE_HEX, NULL, 0, "primary_ifp_packet octet string", HFILL }}, { &hf_t38_primary_ifp_packet_length, { "primary_ifp_packet_length", "t38.primary_ifp_packet_length", FT_UINT32, BASE_DEC, NULL, 0, "primary_ifp_packet_length", HFILL }}, { &hf_t38_error_recovery, { "Error recovery", "t38.error_recovery", FT_UINT32, BASE_DEC, VALS(error_recovery_vals), 0, "error_recovery choice", HFILL }}, { &hf_t38_secondary_ifp_packets, { "Secondary IFPPackets", "t38.secondary_ifp_packets", FT_NONE, BASE_NONE, NULL, 0, "secondary_ifp_packets sequence of", HFILL }}, { &hf_t38_secondary_ifp_packets_item, { "Secondary IFPPackets item", "t38.secondary_ifp_packets_item", FT_BYTES, BASE_HEX, NULL, 0, "secondary_ifp_packets_item octet string", HFILL }}, { &hf_t38_secondary_ifp_packets_item_length, { "secondary_ifp_packets_item_length", "t38.secondary_ifp_packets_item_length", FT_UINT32, BASE_DEC, NULL, 0, "secondary_ifp_packets_item_length", HFILL }}, { &hf_t38_fec_info, { "Fec info", "t38.fec_info", FT_NONE, BASE_NONE, NULL, 0, "fec_info sequence", HFILL }}, { &hf_t38_fec_npackets, { "Fec npackets", "h245.fec_npackets", FT_INT32, BASE_DEC, NULL, 0, "fec_npackets value", HFILL }}, { &hf_t38_fec_data, { "Fec data", "t38.fec_data", FT_NONE, BASE_NONE, NULL, 0, "fec_data sequence of", HFILL }}, { &hf_t38_fec_data_item, { "t38_fec_data_item", "t38.t38_fec_data_item", FT_BYTES, BASE_HEX, NULL, 0, "t38_fec_data_item octet string", HFILL }}, { &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_data_fragments, {"Message fragments", "data.fragments", FT_NONE, BASE_NONE, NULL, 0x00, NULL, HFILL } }, {&hf_data_fragment, {"Message fragment", "data.fragment", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } }, {&hf_data_fragment_overlap, {"Message fragment overlap", "data.fragment.overlap", FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL } }, {&hf_data_fragment_overlap_conflicts, {"Message fragment overlapping with conflicting data", "data.fragment.overlap.conflicts", FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL } }, {&hf_data_fragment_multiple_tails, {"Message has multiple tail fragments", "data.fragment.multiple_tails", FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL } }, {&hf_data_fragment_too_long_fragment, {"Message fragment too long", "data.fragment.too_long_fragment", FT_BOOLEAN, BASE_NONE, NULL, 0x00, NULL, HFILL } }, {&hf_data_fragment_error, {"Message defragmentation error", "data.fragment.error", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } }, {&hf_data_reassembled_in, {"Reassembled in", "data.reassembled.in", FT_FRAMENUM, BASE_NONE, NULL, 0x00, NULL, HFILL } }, }; static gint *ett[] = { &ett_t38, &ett_t38_IFPPacket, &ett_t38_Type_of_msg, &ett_t38_t30_indicator, &ett_t38_data, &ett_t38_Data_Field, &ett_t38_Data_Field_item, &ett_t38_Data_Field_field_type, &ett_t38_UDPTLPacket, &ett_t38_error_recovery, &ett_t38_secondary_ifp_packets, &ett_t38_fec_info, &ett_t38_fec_data, &ett_t38_setup, &ett_data_fragment, &ett_data_fragments }; static hf_register_info hf_t30[] = { { &hf_t30_Address, { "Address", "t30.Address", FT_UINT8, BASE_HEX, NULL, 0, "Address Field", HFILL }}, { &hf_t30_Control, { "Control", "t30.Control", FT_UINT8, BASE_HEX, VALS(t30_control_vals), 0, "Address Field", HFILL }}, { &hf_t30_Facsimile_Control, { "Facsimile Control", "t30.FacsimileControl", FT_UINT8, BASE_DEC, VALS(t30_facsimile_control_field_vals), 0, "Facsimile Control", HFILL }}, { &hf_t30_fif_sm, { "Store and forward Internet fax- Simple mode (ITU-T T.37)", "t30.fif.sm", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_rtif, { "Real-time Internet fax (ITU T T.38)", "t30.fif.rtif", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x20, "", HFILL }}, { &hf_t30_fif_3gmn, { "3rd Generation Mobile Network", "t30.fif.3gmn", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x10, "", HFILL }}, { &hf_t30_fif_v8c, { "V.8 capabilities", "t30.fif.v8c", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x04, "", HFILL }}, { &hf_t30_fif_op, { "Octets preferred", "t30.fif.op", FT_BOOLEAN, 8, TFS(&t30_octets_preferred_value), 0x02, "", HFILL }}, { &hf_t30_fif_rtfc, { "Ready to transmit a facsimile document (polling)", "t30.fif.rtfc", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_rfo, { "Receiver fax operation", "t30.fif.rfo", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x40, "", HFILL }}, { &hf_t30_fif_dsr, { "Data signalling rate", "t30.fif.dsr", FT_UINT8, BASE_HEX, VALS(t30_data_signalling_rate_vals), 0x3C, "", HFILL }}, { &hf_t30_fif_dsr_dcs, { "Data signalling rate", "t30.fif.dsr_dcs", FT_UINT8, BASE_HEX, VALS(t30_data_signalling_rate_dcs_vals), 0x3C, "", HFILL }}, { &hf_t30_fif_res, { "R8x7.7 lines/mm and/or 200x200 pels/25.4 mm", "t30.fif.res", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x02, "", HFILL }}, { &hf_t30_fif_tdcc, { "Two dimensional coding capability", "t30.fif.tdcc", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x01, "", HFILL }}, { &hf_t30_fif_rwc, { "Recording width capabilities", "t30.fif.rwc", FT_UINT8, BASE_HEX, VALS(t30_recording_width_capabilities_vals), 0xC0, "", HFILL }}, { &hf_t30_fif_rw_dcs, { "Recording width", "t30.fif.rw_dcs", FT_UINT8, BASE_HEX, VALS(t30_recording_width_dcs_vals), 0xC0, "", HFILL }}, { &hf_t30_fif_rlc, { "Recording length capability", "t30.fif.rlc", FT_UINT8, BASE_HEX, VALS(t30_recording_length_capability_vals), 0x30, "", HFILL }}, { &hf_t30_fif_rl_dcs, { "Recording length capability", "t30.fif.rl_dcs", FT_UINT8, BASE_HEX, VALS(t30_recording_length_dcs_vals), 0x30, "", HFILL }}, { &hf_t30_fif_msltcr, { "Minimum scan line time capability at the receiver", "t30.fif.msltcr", FT_UINT8, BASE_HEX, VALS(t30_minimum_scan_line_time_rec_vals), 0x0E, "", HFILL }}, { &hf_t30_fif_mslt_dcs, { "Minimum scan line time", "t30.fif.mslt_dcs", FT_UINT8, BASE_HEX, VALS(t30_minimum_scan_line_time_dcs_vals), 0x0E, "", HFILL }}, { &hf_t30_fif_ext, { "Extension indicator", "t30.fif.ext", FT_BOOLEAN, 8, TFS(&t30_extension_ind_value), 0x01, "", HFILL }}, { &hf_t30_fif_cm, { "Compress/Uncompress mode", "t30.fif.cm", FT_BOOLEAN, 8, TFS(&t30_compress_value), 0x40, "", HFILL }}, { &hf_t30_fif_ecm, { "Error correction mode", "t30.fif.ecm", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x20, "", HFILL }}, { &hf_t30_fif_fs_dcs, { "Frame size", "t30.fif.fs_dcm", FT_BOOLEAN, 8, TFS(&t30_frame_size_dcs_value), 0x10, "", HFILL }}, { &hf_t30_fif_t6, { "T.6 coding capability", "t30.fif.t6", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x02, "", HFILL }}, { &hf_t30_fif_fvc, { "Field valid capability", "t30.fif.fvc", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_mspc, { "Multiple selective polling capability", "t30.fif.mspc", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x40, "", HFILL }}, { &hf_t30_fif_ps, { "Polled Subaddress", "t30.fif.ps", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x20, "", HFILL }}, { &hf_t30_fif_t43, { "T.43 coding", "t30.fif.t43", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x10, "", HFILL }}, { &hf_t30_fif_pi, { "Plane interleave", "t30.fif.pi", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x08, "", HFILL }}, { &hf_t30_fif_vc32k, { "Voice coding with 32k ADPCM (ITU T G.726)", "t30.fif.vc32k", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x04, "", HFILL }}, { &hf_t30_fif_r8x15, { "R8x15.4 lines/mm", "t30.fif.r8x15", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_300x300, { "300x300 pels/25.4 mm", "t30.fif.300x300", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x40, "", HFILL }}, { &hf_t30_fif_r16x15, { "R16x15.4 lines/mm and/or 400x400 pels/25.4 mm", "t30.fif.r16x15", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x20, "", HFILL }}, { &hf_t30_fif_ibrp, { "Inch based resolution preferred", "t30.fif.ibrp", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x10, "", HFILL }}, { &hf_t30_fif_mbrp, { "Metric based resolution preferred", "t30.fif.mbrp", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x08, "", HFILL }}, { &hf_t30_fif_msltchr, { "Minimum scan line time capability for higher resolutions", "t30.fif.msltchr", FT_BOOLEAN, 8, TFS(&t30_minimum_scan_value), 0x04, "", HFILL }}, { &hf_t30_fif_rts, { "Resolution type selection", "t30.fif.rts", FT_BOOLEAN, 8, TFS(&t30_res_type_sel_value), 0x10, "", HFILL }}, { &hf_t30_fif_sp, { "Selective polling", "t30.fif.sp", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x02, "", HFILL }}, { &hf_t30_fif_sc, { "Subaddressing capability", "t30.fif.sc", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_passw, { "Password", "t30.fif.passw", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x40, "", HFILL }}, { &hf_t30_fif_sit, { "Sender Identification transmission", "t30.fif.sit", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x40, "", HFILL }}, { &hf_t30_fif_rttd, { "Ready to transmit a data file (polling)", "t30.fif.rttd", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x20, "", HFILL }}, { &hf_t30_fif_bft, { "Binary File Transfer (BFT)", "t30.fif.bft", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x08, "", HFILL }}, { &hf_t30_fif_dtm, { "Document Transfer Mode (DTM)", "t30.fif.dtm", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x04, "", HFILL }}, { &hf_t30_fif_edi, { "Electronic Data Interchange (EDI)", "t30.fif.edi", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x02, "", HFILL }}, { &hf_t30_fif_btm, { "Basic Transfer Mode (BTM)", "t30.fif.btm", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_rttcmmd, { "Ready to transmit a character or mixed mode document (polling)", "t30.fif.rttcmmd", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x20, "", HFILL }}, { &hf_t30_fif_chrm, { "Character mode", "t30.fif.cm", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x10, "", HFILL }}, { &hf_t30_fif_mm, { "Mixed mode (Annex E/T.4)", "t30.fif.mm", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x04, "", HFILL }}, { &hf_t30_fif_pm26, { "Processable mode 26 (ITU T T.505)", "t30.fif.pm26", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_dnc, { "Digital network capability", "t30.fif.dnc", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x40, "", HFILL }}, { &hf_t30_fif_do, { "Duplex operation", "t30.fif.do", FT_BOOLEAN, 8, TFS(&t30_duplex_operation_value), 0x20, "", HFILL }}, { &hf_t30_fif_jpeg, { "JPEG coding", "t30.fif.jpeg", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x10, "", HFILL }}, { &hf_t30_fif_fcm, { "Full colour mode", "t30.fif.fcm", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x08, "", HFILL }}, { &hf_t30_fif_pht, { "Preferred Huffman tables", "t30.fif.pht", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x08, "", HFILL }}, { &hf_t30_fif_12c, { "12 bits/pel component", "t30.fif.12c", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x02, "", HFILL }}, { &hf_t30_fif_ns, { "No subsampling (1:1:1)", "t30.fif.ns", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_ci, { "Custom illuminant", "t30.fif.ci", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x40, "", HFILL }}, { &hf_t30_fif_cgr, { "Custom gamut range", "t30.fif.cgr", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x20, "", HFILL }}, { &hf_t30_fif_nalet, { "North American Letter (215.9 x 279.4 mm) capability", "t30.fif.nalet", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x10, "", HFILL }}, { &hf_t30_fif_naleg, { "North American Legal (215.9 x 355.6 mm) capability", "t30.fif.naleg", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x08, "", HFILL }}, { &hf_t30_fif_spscb, { "Single-progression sequential coding (ITU-T T.85) basic capability", "t30.fif.spscb", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x04, "", HFILL }}, { &hf_t30_fif_spsco, { "Single-progression sequential coding (ITU-T T.85) optional L0 capability", "t30.fif.spsco", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x02, "", HFILL }}, { &hf_t30_fif_hkm, { "HKM key management capability", "t30.fif.hkm", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_rsa, { "RSA key management capability", "t30.fif.rsa", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x40, "", HFILL }}, { &hf_t30_fif_oc, { "Override capability", "t30.fif.oc", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x20, "", HFILL }}, { &hf_t30_fif_hfx40, { "HFX40 cipher capability", "t30.fif.hfx40", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x10, "", HFILL }}, { &hf_t30_fif_acn2c, { "Alternative cipher number 2 capability", "t30.fif.acn2c", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x08, "", HFILL }}, { &hf_t30_fif_acn3c, { "Alternative cipher number 3 capability", "t30.fif.acn3c", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x04, "", HFILL }}, { &hf_t30_fif_hfx40i, { "HFX40-I hashing capability", "t30.fif.hfx40i", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x02, "", HFILL }}, { &hf_t30_fif_ahsn2, { "Alternative hashing system number 2 capability", "t30.fif.ahsn2", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_ahsn3, { "Alternative hashing system number 3 capability", "t30.fif.ahsn3", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x40, "", HFILL }}, { &hf_t30_fif_t441, { "T.44 (Mixed Raster Content)", "t30.fif.t441", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x10, "", HFILL }}, { &hf_t30_fif_t442, { "T.44 (Mixed Raster Content)", "t30.fif.t442", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x08, "", HFILL }}, { &hf_t30_fif_t443, { "T.44 (Mixed Raster Content)", "t30.fif.t443", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x04, "", HFILL }}, { &hf_t30_fif_plmss, { "Page length maximum strip size for T.44 (Mixed Raster Content)", "t30.fif.plmss", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x02, "", HFILL }}, { &hf_t30_fif_cg300, { "Colour/gray-scale 300 pels/25.4 mm x 300 lines/25.4 mm or 400 pels/25.4 mm x 400 lines/25.4 mm resolution", "t30.fif.cg300", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_100x100cg, { "100 pels/25.4 mm x 100 lines/25.4 mm for colour/gray scale", "t30.fif.100x100cg", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x40, "", HFILL }}, { &hf_t30_fif_spcbft, { "Simple Phase C BFT Negotiations capability", "t30.fif.spcbft", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x20, "", HFILL }}, { &hf_t30_fif_ebft, { "Extended BFT Negotiations capability", "t30.fif.ebft", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x10, "", HFILL }}, { &hf_t30_fif_isp, { "Internet Selective Polling Address (ISP)", "t30.fif.isp", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x08, "", HFILL }}, { &hf_t30_fif_ira, { "Internet Routing Address (IRA)", "t30.fif.ira", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x04, "", HFILL }}, { &hf_t30_fif_600x600, { "600 pels/25.4 mm x 600 lines/25.4 mm", "t30.fif.600x600", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_1200x1200, { "1200 pels/25.4 mm x 1200 lines/25.4 mm", "t30.fif.1200x1200", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x40, "", HFILL }}, { &hf_t30_fif_300x600, { "300 pels/25.4 mm x 600 lines/25.4 mm", "t30.fif.300x600", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x20, "", HFILL }}, { &hf_t30_fif_400x800, { "400 pels/25.4 mm x 800 lines/25.4 mm", "t30.fif.400x800", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x10, "", HFILL }}, { &hf_t30_fif_600x1200, { "600 pels/25.4 mm x 1200 lines/25.4 mm", "t30.fif.600x1200", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x08, "", HFILL }}, { &hf_t30_fif_cg600x600, { "Colour/gray scale 600 pels/25.4 mm x 600 lines/25.4 mm resolution", "t30.fif.cg600x600", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x04, "", HFILL }}, { &hf_t30_fif_cg1200x1200, { "Colour/gray scale 1200 pels/25.4 mm x 1200 lines/25.4 mm resolution", "t30.fif.cg1200x1200", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x02, "", HFILL }}, { &hf_t30_fif_dspcam, { "Double sided printing capability (alternate mode)", "t30.fif.dspcam", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x80, "", HFILL }}, { &hf_t30_fif_dspccm, { "Double sided printing capability (continuous mode)", "t30.fif.dspccm", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x40, "", HFILL }}, { &hf_t30_fif_bwmrcp, { "Black and white mixed raster content profile (MRCbw)", "t30.fif.bwmrcp", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x20, "", HFILL }}, { &hf_t30_fif_t45, { "T.45 (run length colour encoding)", "t30.fif.t45", FT_BOOLEAN, 8, TFS(&flags_set_truth), 0x10, "", HFILL }}, { &hf_t30_fif_sdmc, { "SharedDataMemory capacity", "t30.fif.sdmc", FT_UINT8, BASE_HEX, VALS(t30_SharedDataMemory_capacity_vals), 0x0C, "", HFILL }}, { &hf_t30_fif_number, { "Number", "t30.fif.number", FT_STRING, BASE_NONE, NULL, 0x0, "", HFILL }}, { &hf_t30_fif_country_code, { "ITU-T Country code", "t30.fif.country_code", FT_UINT8, BASE_DEC, NULL, 0, "ITU-T Country code", HFILL }}, { &hf_t30_fif_non_stand_bytes, { "Non-standard capabilities", "t30.fif.non_standard_cap", FT_BYTES, BASE_HEX, NULL, 0, "Non-standard capabilities", HFILL }}, { &hf_t30_t4_frame_num, { "T.4 Frame number", "t30.t4.frame_num", FT_UINT8, BASE_DEC, NULL, 0, "T.4 Frame number", HFILL }}, { &hf_t30_t4_data, { "T.4 Facsimile data field", "t30.t4.data", FT_BYTES, BASE_HEX, NULL, 0, "T.4 Facsimile data field", HFILL }}, { &hf_t30_partial_page_fcf2, { "Post-message command", "t30.pps.fcf2", FT_UINT8, BASE_DEC, VALS(t30_partial_page_fcf2_vals), 0, "Post-message command", HFILL }}, { &hf_t30_partial_page_i1, { "Page counter", "t30.t4.page_count", FT_UINT8, BASE_DEC, NULL, 0, "Page counter", HFILL }}, { &hf_t30_partial_page_i2, { "Block counter", "t30.t4.block_count", FT_UINT8, BASE_DEC, NULL, 0, "Block counter", HFILL }}, { &hf_t30_partial_page_i3, { "Frame counter", "t30.t4.frame_count", FT_UINT8, BASE_DEC, NULL, 0, "Frame counter", HFILL }}, }; static gint *t30_ett[] = { &ett_t30, &ett_t30_fif, }; module_t *t38_module; 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)); register_dissector("t38", dissect_t38, proto_t38); /* Init reassemble tables for HDLC */ register_init_routine(t38_defragment_init); 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_uint_preference(t38_module, "tcp.port", "T.38 TCP Port", "Set the TCP port for T.38 messages", 10, &global_t38_tcp_port); prefs_register_uint_preference(t38_module, "udp.port", "T.38 UDP Port", "Set the UDP port for T.38 messages", 10, &global_t38_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); /* T30 */ proto_t30 = proto_register_protocol("T.30", "T.30", "t30"); proto_register_field_array(proto_t30, hf_t30, array_length(hf_t30)); proto_register_subtree_array(t30_ett, array_length(t30_ett)); } void proto_reg_handoff_t38(void) { static int 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); t38_prefs_initialized = TRUE; } else { dissector_delete("tcp.port", tcp_port, t38_tcp_handle); dissector_delete("udp.port", udp_port, t38_udp_handle); } tcp_port = global_t38_tcp_port; udp_port = global_t38_udp_port; dissector_add("tcp.port", tcp_port, t38_tcp_handle); dissector_add("udp.port", udp_port, t38_udp_handle); rtp_handle = find_dissector("rtp"); }