generate T.38 dissector from ASN.1 source

svn path=/trunk/; revision=21676

7 files changed, 1329 insertions, 0 deletions

diff --git a/asn1/t38/Makefile b/asn1/t38/Makefile
new file mode 100644
index 0000000000..a64f77deb4
--- /dev/null
+++ b/asn1/t38/Makefile
@@ -0,0 +1,16 @@
+# $Id$
+
+DISSECTOR_FILES=packet-t38.c packet-t38.h
+
+all: generate_dissector
+
+generate_dissector: $(DISSECTOR_FILES)
+
+$(DISSECTOR_FILES): ../../tools/asn2wrs.py packet-t38-template.c packet-t38-template.h t38.cnf
+	python ../../tools/asn2wrs.py -p t38 -c t38.cnf -s packet-t38-template T38(2002).asn
+
+clean:
+	rm -f parsetab.py $(DISSECTOR_FILES)
+
+copy_files: generate_dissector
+	cp $(DISSECTOR_FILES) ../../epan/dissectors
diff --git a/asn1/t38/Makefile.nmake b/asn1/t38/Makefile.nmake
new file mode 100644
index 0000000000..ee234c2ab5
--- /dev/null
+++ b/asn1/t38/Makefile.nmake
@@ -0,0 +1,46 @@
+## Use: $(MAKE) /$(MAKEFLAGS) -f makefile.nmake
+#
+# $Id$
+
+include ../../config.nmake
+
+UNIX2DOS=$(PERL) ../../tools/unix2dos.pl
+
+PROTOCOL_NAME=t38
+DISSECTOR_FILES=packet-$(PROTOCOL_NAME).c packet-$(PROTOCOL_NAME).h
+T38_ASN=T38(2002).asn
+
+all: generate_dissector
+
+generate_dissector: $(DISSECTOR_FILES)
+
+$(DISSECTOR_FILES): ../../tools/asn2wrs.py $(T38_ASN) packet-$(PROTOCOL_NAME)-template.c packet-$(PROTOCOL_NAME)-template.h $(PROTOCOL_NAME).cnf
+!IFDEF PYTHON
+	$(PYTHON) "../../tools/asn2wrs.py" -p $(PROTOCOL_NAME) -c $(PROTOCOL_NAME).cnf -s packet-$(PROTOCOL_NAME)-template $(T38_ASN)
+!ELSE
+	@echo Error: You need Python to use asn2wrs.py
+	@exit 1
+!ENDIF
+
+clean:
+	rm -f parsetab.py parsetab.pyc $(DISSECTOR_FILES)
+
+distclean: clean
+
+maintainer-clean: distclean
+
+# Fix EOL in generated dissectors. Cygwin's python generates files with 
+# mixed EOL styles, which can't be commited to the SVN repository.
+# Stuff included from template and "cnf" files has "\r\n" on windows, while 
+# the generated stuff has "\n".
+
+fix_eol: generate_dissector
+	move packet-$(PROTOCOL_NAME).c packet-$(PROTOCOL_NAME).c.tmp
+	move packet-$(PROTOCOL_NAME).h packet-$(PROTOCOL_NAME).h.tmp
+	$(UNIX2DOS) < packet-$(PROTOCOL_NAME).c.tmp > packet-$(PROTOCOL_NAME).c
+	$(UNIX2DOS) < packet-$(PROTOCOL_NAME).h.tmp > packet-$(PROTOCOL_NAME).h
+	del /f packet-$(PROTOCOL_NAME).c.tmp packet-$(PROTOCOL_NAME).h.tmp
+
+copy_files: generate_dissector fix_eol
+	xcopy packet-$(PROTOCOL_NAME).c ..\..\epan\dissectors /d /y
+	xcopy packet-$(PROTOCOL_NAME).h ..\..\epan\dissectors /d /y
diff --git a/asn1/t38/T38(1998).asn b/asn1/t38/T38(1998).asn
new file mode 100644
index 0000000000..64113f9099
--- /dev/null
+++ b/asn1/t38/T38(1998).asn
@@ -0,0 +1,57 @@
+-- T38(1998).asn
+--
+-- Taken from ITU ASN.1 database
+-- http://www.itu.int/ITU-T/asn1/database/itu-t/t/t38/2005/T38(1998).asn
+--
+-- $Id$
+--
+-- it is not used for dissector generation
+-- it is here only for information to see difference of the "Pre-Corrigendum" version
+--
+
+-- Module T38(1998) (T.38:09/2005)
+T38 DEFINITIONS AUTOMATIC TAGS ::=
+BEGIN
+
+IFPPacket ::= SEQUENCE {
+  type-of-msg  Type-of-msg,
+  data-field   Data-Field OPTIONAL
+}
+
+Type-of-msg ::= CHOICE {
+  t30-indicator
+    ENUMERATED {no-signal, cng, ced, v21-preamble, v27-2400-training,
+                v27-4800-training, v29-7200-training, v29-9600-training,
+                v17-7200-short-training, v17-7200-long-training,
+                v17-9600-short-training, v17-9600-long-training,
+                v17-12000-short-training, v17-12000-long-training,
+                v17-14400-short-training, v17-14400-long-training, ...
+                },
+  data
+    ENUMERATED {v21, v27-2400, v27-4800, v29-7200, v29-9600, v17-7200,
+                v17-9600, v17-12000, v17-14400, ...
+                }
+}
+
+Data-Field ::=
+  SEQUENCE OF
+    SEQUENCE {field-type
+                ENUMERATED {hdlc-data, hdlc-sig-end, hdlc-fcs-OK, hdlc-fcs-BAD,
+                            hdlc-fcs-OK-sig-end, hdlc-fcs-BAD-sig-end,
+                            t4-non-ecm-data, t4-non-ecm-sig-end},
+              field-data  OCTET STRING(SIZE (1..65535)) OPTIONAL}
+
+UDPTLPacket ::= SEQUENCE {
+  seq-number          INTEGER(0..65535),
+  primary-ifp-packet  TYPE-IDENTIFIER.&Type(IFPPacket),
+  error-recovery
+    CHOICE {secondary-ifp-packets  SEQUENCE OF TYPE-IDENTIFIER.&Type(IFPPacket),
+            fec-info
+              SEQUENCE {fec-npackets  INTEGER,
+                        fec-data      SEQUENCE OF OCTET STRING}}
+}
+
+END
+
+-- Generated by Asnp, the ASN.1 pretty-printer of France Telecom R&D
+
diff --git a/asn1/t38/T38(2002).asn b/asn1/t38/T38(2002).asn
new file mode 100644
index 0000000000..9fe81266f8
--- /dev/null
+++ b/asn1/t38/T38(2002).asn
@@ -0,0 +1,56 @@
+-- T38(2002).asn
+--
+-- Taken from ITU ASN.1 database
+-- http://www.itu.int/ITU-T/asn1/database/itu-t/t/t38/2005/T38(2002).asn
+--
+-- $Id$
+--
+
+-- Module T38(2002) (T.38:09/2005)
+T38 DEFINITIONS AUTOMATIC TAGS ::=
+BEGIN
+
+IFPPacket ::= SEQUENCE {
+  type-of-msg  Type-of-msg,
+  data-field   Data-Field OPTIONAL
+}
+
+Type-of-msg ::= CHOICE {
+  t30-indicator
+    ENUMERATED {no-signal, cng, ced, v21-preamble, v27-2400-training,
+                v27-4800-training, v29-7200-training, v29-9600-training,
+                v17-7200-short-training, v17-7200-long-training,
+                v17-9600-short-training, v17-9600-long-training,
+                v17-12000-short-training, v17-12000-long-training,
+                v17-14400-short-training, v17-14400-long-training, ..., 
+                v8-ansam, v8-signal, v34-cntl-channel-1200, v34-pri-channel,
+                v34-CC-retrain, v33-12000-training, v33-14400-training},
+  t30-data
+    ENUMERATED {v21, v27-2400, v27-4800, v29-7200, v29-9600, v17-7200,
+                v17-9600, v17-12000, v17-14400, ..., 
+                v8, v34-pri-rate, v34-CC-1200, v34-pri-ch, v33-12000, v33-14400}
+}
+
+Data-Field ::=
+  SEQUENCE OF
+    SEQUENCE {field-type
+                ENUMERATED {hdlc-data, hdlc-sig-end, hdlc-fcs-OK, hdlc-fcs-BAD,
+                            hdlc-fcs-OK-sig-end, hdlc-fcs-BAD-sig-end,
+                            t4-non-ecm-data, t4-non-ecm-sig-end, ..., 
+                            cm-message, jm-message, ci-message, v34rate},
+              field-data  OCTET STRING(SIZE (1..65535)) OPTIONAL}
+
+UDPTLPacket ::= SEQUENCE {
+  seq-number          INTEGER(0..65535),
+  primary-ifp-packet  TYPE-IDENTIFIER.&Type(IFPPacket),
+  error-recovery
+    CHOICE {secondary-ifp-packets  SEQUENCE OF TYPE-IDENTIFIER.&Type(IFPPacket),
+            fec-info
+              SEQUENCE {fec-npackets  INTEGER,
+                        fec-data      SEQUENCE OF OCTET STRING}}
+}
+
+END
+
+-- Generated by Asnp, the ASN.1 pretty-printer of France Telecom R&D
+
diff --git a/asn1/t38/packet-t38-template.c b/asn1/t38/packet-t38-template.c
new file mode 100644
index 0000000000..61fe14404c
--- /dev/null
+++ b/asn1/t38/packet-t38-template.c
@@ -0,0 +1,819 @@
+/* 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 <gerald@wireshark.org>
+ * 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 <glib.h>
+#include <epan/packet.h>
+#include <epan/reassemble.h>
+#include <epan/conversation.h>
+#include <epan/tap.h>
+#include <epan/expert.h>
+
+#include <stdio.h>
+#include <string.h>
+
+#include "packet-t38.h"
+#include <epan/prefs.h>
+#include <epan/ipproto.h>
+#include <epan/asn1.h>
+#include "packet-per.h"
+#include "packet-tpkt.h"
+#include <epan/emem.h>
+
+#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}
+};
+
+
+
+/* T38 */
+static dissector_handle_t t38_udp_handle;
+static dissector_handle_t t38_tcp_handle;
+static dissector_handle_t t38_tcp_pdu_handle;
+static dissector_handle_t rtp_handle;
+static dissector_handle_t t30_hdlc_handle;
+static dissector_handle_t data_handle;
+
+static 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;
+#include "packet-t38-hf.c"
+
+/* T38 setup fields */
+static int hf_t38_setup        = -1;
+static int hf_t38_setup_frame  = -1;
+static int hf_t38_setup_method = -1;
+
+/* T38 Data reassemble fields */
+static int hf_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;
+#include "packet-t38-ett.c"
+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, proto_tree *tree, t38_conv *p_t38_conv);
+/* Preferences bool to control whether or not setup info should be shown */
+static gboolean global_t38_show_setup_info = TRUE;
+
+/* Can tap up to 4 T38 packets within same packet */
+/* We only tap the primary part, not the redundancy */
+#define MAX_T38_MESSAGES_IN_PACKET 4
+static t38_packet_info t38_info_arr[MAX_T38_MESSAGES_IN_PACKET];
+static int t38_info_current=0;
+static t38_packet_info *t38_info=NULL;
+
+static void t38_defragment_init(void)
+{
+	/* Init 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;
+}
+
+
+fragment_data *
+force_reassemble_seq(packet_info *pinfo, guint32 id,
+	     GHashTable *fragment_table)
+{
+	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;
+}
+
+/* T38 Routines */
+#include "packet-t38-fn.c"
+
+/* initialize the tap t38_info and the conversation */
+static void
+init_t38_info_conv(packet_info *pinfo)
+{
+	/* tap info */
+	t38_info_current++;
+	if (t38_info_current==MAX_T38_MESSAGES_IN_PACKET) {
+		t38_info_current=0;
+	}
+	t38_info = &t38_info_arr[t38_info_current];
+
+	t38_info->seq_num = 0;
+	t38_info->type_msg = 0;
+	t38_info->data_value = 0;
+	t38_info->t30ind_value =0;
+	t38_info->setup_frame_number = 0;
+	t38_info->Data_Field_field_type_value = 0;
+	t38_info->desc[0] = '\0';
+	t38_info->desc_comment[0] = '\0';
+	t38_info->time_first_t4_data = 0;
+	t38_info->frame_num_first_t4_data = 0;
+
+
+	/* 
+		p_t38_packet_conv hold the conversation info in each of the packets.
+		p_t38_conv hold the conversation info used to reassemble the HDLC packets, and also the Setup info (e.g SDP)
+		If we already have p_t38_packet_conv in the packet, it means we already reassembled the HDLC packets, so we don't 
+		need to use p_t38_conv 
+	*/
+	p_t38_packet_conv = NULL;
+	p_t38_conv = NULL;
+
+	/* Use existing packet info if available */
+	 p_t38_packet_conv = 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;
+
+	/*
+	 * 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, tr, p_t38_packet_conv);
+	}
+
+	if (check_col(pinfo->cinfo, COL_INFO)){
+		col_append_fstr(pinfo->cinfo, COL_INFO, "UDP: UDPTLPacket ");
+	}
+
+	offset = dissect_UDPTLPacket_PDU(tvb, pinfo, tr);
+
+	if (tvb_length_remaining(tvb,offset)>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;
+    tvbuff_t *next_tvb;
+	guint16 ifp_packet_number=1;
+
+	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, tr, 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)>0)
+	{
+		next_tvb = tvb_new_subset(tvb, offset, -1, -1);
+		offset += dissect_IFPPacket_PDU(next_tvb, pinfo, tr);
+		ifp_packet_number++;
+
+		if(tvb_length_remaining(tvb,offset)>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, proto_tree *tree, 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[] =
+	{
+#include "packet-t38-hfarr.c"
+		{   &hf_t38_setup,
+		    { "Stream setup", "t38.setup", FT_STRING, BASE_NONE,
+		    NULL, 0x0, "Stream setup, method and frame number", HFILL }},
+		{   &hf_t38_setup_frame,
+            { "Stream frame", "t38.setup-frame", FT_FRAMENUM, BASE_NONE,
+            NULL, 0x0, "Frame that set up this stream", HFILL }},
+        {   &hf_t38_setup_method,
+            { "Stream Method", "t38.setup-method", FT_STRING, BASE_NONE,
+            NULL, 0x0, "Method used to set up this stream", HFILL }},
+		{&hf_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,
+#include "packet-t38-ettarr.c"
+		&ett_t38_setup,
+		&ett_data_fragment,
+		&ett_data_fragments
+	};
+
+	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);
+
+}
+
+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");
+	t30_hdlc_handle = find_dissector("t30.hdlc");
+	data_handle = find_dissector("data");
+}
+
+
+
+
diff --git a/asn1/t38/packet-t38-template.h b/asn1/t38/packet-t38-template.h
new file mode 100644
index 0000000000..1ebbb72416
--- /dev/null
+++ b/asn1/t38/packet-t38-template.h
@@ -0,0 +1,80 @@
+/* packet-t38.h
+ *
+ * Routines for T38 dissection
+ * 2003 Hans Viens
+ * 2004 Alejandro Vaquero, add support to conversation
+ *
+ * $Id$
+ *
+ * Wireshark - Network traffic analyzer
+ * By Gerald Combs <gerald@wireshark.org>
+ * 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.
+ */
+
+#define MAX_T38_DATA_ITEMS 4
+#define MAX_T38_DESC 128
+
+typedef struct _t38_packet_info {
+	guint16 seq_num;	/* UDPTLPacket sequence number */
+	guint32 type_msg;	/* 0=t30-indicator    1=data */
+	guint32 t30ind_value;
+	guint32 data_value;	/* standard and speed */
+	guint32 setup_frame_number;
+	guint32 Data_Field_field_type_value;
+	guint8	t30_Facsimile_Control;
+	gchar   desc[MAX_T38_DESC]; /* Description used to be displayed in the frame label Graph Anlaysis */
+	gchar   desc_comment[MAX_T38_DESC]; /* Description used to be displayed in the Comment Graph Anlaysis */
+	double time_first_t4_data; 
+	guint32 frame_num_first_t4_data;
+} t38_packet_info;
+
+
+#define MAX_T38_SETUP_METHOD_SIZE 7
+
+
+/* Info to save the State to reassemble Data (e.g. HDLC) and the Setup (e.g. SDP) in T38 conversations */
+typedef struct _t38_conv_info
+{
+	guint32 reass_ID;
+	int reass_start_seqnum;
+	guint32 reass_data_type;
+	gint32 last_seqnum; /* used to avoid duplicated seq num shown in the Graph Analysis */
+	guint32 packet_lost;
+	guint32 burst_lost;
+	double time_first_t4_data; 
+} t38_conv_info;
+
+/* Info to save the State to reassemble Data (e.g. HDLC) and the Setup (e.g. SDP) in T38 conversations */
+typedef struct _t38_conv
+{
+	gchar   setup_method[MAX_T38_SETUP_METHOD_SIZE + 1];
+	guint32 setup_frame_number;
+	t38_conv_info src_t38_info;
+	t38_conv_info dst_t38_info;
+} t38_conv;
+
+/* Add an T38 conversation with the given details */
+void t38_add_address(packet_info *pinfo,
+                     address *addr, int port,
+                     int other_port,
+                     const gchar *setup_method, guint32 setup_frame_number);
+
+
+#include "packet-t38-exp.h"
+
+
+
diff --git a/asn1/t38/t38.cnf b/asn1/t38/t38.cnf
new file mode 100644
index 0000000000..9b53052f3f
--- /dev/null
+++ b/asn1/t38/t38.cnf
@@ -0,0 +1,255 @@
+# t38.cnf
+# T.38 conformation file
+# 2007  Tomas Kukosa
+
+# $Id$
+
+#.EXPORTS ONLY_VALS WS_VAR
+Type-of-msg/t30-indicator
+Type-of-msg/t30-data
+#.END
+
+#.TYPE_RENAME
+Type-of-msg/t30-indicator  T30_indicator
+Type-of-msg/t30-data       T30_data
+#.END
+
+#.PDU_NEW
+IFPPacket
+UDPTLPacket
+#.END
+
+#.FN_PARS Type-of-msg  VAL_PTR=&Type_of_msg_value
+#.FN_FTR Type-of-msg
+  /* info for tap */
+  if (primary_part)
+    t38_info->type_msg = Type_of_msg_value;
+#.END
+
+#.FN_PARS Type-of-msg/t30-indicator  VAL_PTR=&T30ind_value
+#.FN_FTR Type-of-msg/t30-indicator
+    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,t38_T30_indicator_vals,"<unknown>"));
+    }
+
+    /* info for tap */
+    if (primary_part)
+        t38_info->t30ind_value = T30ind_value;
+#.END
+
+#.FN_PARS Type-of-msg/t30-data  VAL_PTR=&Data_value
+#.FN_FTR Type-of-msg/t30-data
+    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,t38_T30_data_vals,"<unknown>"));
+    }
+
+    
+    /* info for tap */
+    if (primary_part)
+        t38_info->data_value = Data_value;
+#.END
+
+#.FN_FTR Data-Field/_item
+    if (primary_part) Data_Field_item_num++;
+#.END
+
+#.FN_PARS Data-Field/_item/field-type  
+EXT=(use_pre_corrigendum_asn1_specification)?FALSE:TRUE
+EXT_NUM=(use_pre_corrigendum_asn1_specification)?0:4
+VAL_PTR=&Data_Field_field_type_value
+#.FN_FTR Data-Field/_item/field-type
+    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,t38_T_field_type_vals,"<unknown>"));
+    }
+
+    /* 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_reassemble_seq(actx->pinfo,
+                            p_t38_packet_conv_info->reass_ID, /* ID for fragments belonging together */
+                            data_fragment_table /* list of message fragments */
+                        );
+                    } 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;
+                    actx->pinfo->private_data = t38_info;
+
+                    if (new_tvb) call_dissector((t30_hdlc_handle) ? t30_hdlc_handle : data_handle, new_tvb, 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;
+    }
+#.END
+
+#.FN_BODY Data-Field/_item/field-data  VAL_PTR=&value_tvb
+    tvbuff_t *value_tvb = NULL;
+    guint32 value_len;
+
+%(DEFAULT_BODY)s
+    value_len = tvb_length(value_tvb);
+
+#.FN_FTR Data-Field/_item/field-data
+    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;
+        }
+    }
+#.END
+
+
+#.FN_HDR UDPTLPacket
+    /* Initialize to something else than data type */
+    Data_Field_field_type_value = 1;
+#.END
+
+#.FN_PARS UDPTLPacket/seq-number  VAL_PTR=&seq_number
+#.FN_FTR UDPTLPacket/seq-number
+    /* 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);
+    }
+#.END
+
+#.FN_HDR UDPTLPacket/primary-ifp-packet
+    primary_part = TRUE;
+#.FN_FTR UDPTLPacket/primary-ifp-packet
+    /* 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;
+#.END
+
+#.FN_HDR UDPTLPacket/error-recovery
+    primary_part = FALSE;
+#.FN_FTR UDPTLPacket/error-recovery
+    primary_part = TRUE;
+#.END