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wireshark/packet-wtp.c
Guy Harris 4f9508837a Add "show_fragment_seq_tree()", which is like "show_fragment_tree()", 
but for stuff reassembled with "fragment_add_seq()" or
"fragment_add_seq_check()".

Add a "fragment tag" string to the "fragment_items", so that packets
with fragmentation errors can be properly flagged as having "Illegal
fragments" or "Illegal segments" depending on the term used with the
protocol in question.

Make all the dissectors that can use "show_fragment_tree()" or
"show_fragment_seq_tree()", and don't already use them, do so.

svn path=/trunk/; revision=5644
2002-06-07 10:11:41 +00:00

850 lines
25 KiB
C
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/* packet-wtp.c
*
* Routines to dissect WTP component of WAP traffic.
*
* $Id: packet-wtp.c,v 1.35 2002/06/07 10:11:41 guy Exp $
*
* Ethereal - Network traffic analyzer
* By Gerald Combs <gerald@ethereal.com>
* Copyright 1998 Gerald Combs
*
* WAP dissector based on original work by Ben Fowler
* Updated by Neil Hunter <neil.hunter@energis-squared.com>
* WTLS support by Alexandre P. Ferreira (Splice IP)
*
* 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.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_SYS_TYPES_H
# include <sys/types.h>
#endif
#ifdef HAVE_NETINET_IN_H
# include <netinet/in.h>
#endif
#ifdef NEED_SNPRINTF_H
# ifdef HAVE_STDARG_H
# include <stdarg.h>
# else
# include <varargs.h>
# endif
# include "snprintf.h"
#endif
#include <string.h>
#include <glib.h>
#include <epan/packet.h>
#include "reassemble.h"
#include "packet-wap.h"
#include "packet-wtp.h"
#include "packet-wsp.h"
static const true_false_string continue_truth = {
"TPI Present" ,
"No TPI"
};
static const true_false_string RID_truth = {
"Re-Transmission",
"First transmission"
};
static const true_false_string TIDNew_truth = {
"TID is new" ,
"TID is valid"
};
static const true_false_string tid_response_truth = {
"Response" ,
"Original"
};
static const true_false_string UP_truth = {
"User Acknowledgement required" ,
"User Acknowledgement optional"
};
static const true_false_string TVETOK_truth = {
"True",
"False"
};
static const value_string vals_pdu_type[] = {
{ 0, "Not Allowed" },
{ 1, "Invoke" },
{ 2, "Result" },
{ 3, "Ack" },
{ 4, "Abort" },
{ 5, "Segmented Invoke" },
{ 6, "Segmented Result" },
{ 7, "Negative Ack" },
{ 0, NULL }
};
static const value_string vals_transaction_trailer[] = {
{ 0, "Not last packet" },
{ 1, "Last packet of message" },
{ 2, "Last packet of group" },
{ 3, "Re-assembly not supported" },
{ 0, NULL }
};
static const value_string vals_version[] = {
{ 0, "Current" },
{ 1, "Undefined" },
{ 2, "Undefined" },
{ 3, "Undefined" },
{ 0, NULL }
};
static const value_string vals_abort_type[] = {
{ 0, "Provider" },
{ 1, "User (WSP)" },
{ 0, NULL }
};
static const value_string vals_abort_reason_provider[] = {
{ 0x00, "Unknown" },
{ 0x01, "Protocol Error" },
{ 0x02, "Invalid TID" },
{ 0x03, "Not Implemented Class 2" },
{ 0x04, "Not Implemented SAR" },
{ 0x05, "Not Implemented User Acknowledgement" },
{ 0x06, "WTP Version Zero" },
{ 0x07, "Capacity Temporarily Exceeded" },
{ 0x08, "No Response" },
{ 0x09, "Message Too Large" },
{ 0x00, NULL }
};
static const value_string vals_transaction_classes[] = {
{ 0x00, "Unreliable Invoke without Result" },
{ 0x01, "Reliable Invoke without Result" },
{ 0x02, "Reliable Invoke with Reliable Result" },
{ 0x00, NULL }
};
/* File scoped variables for the protocol and registered fields */
static int proto_wtp = HF_EMPTY;
/* These fields used by fixed part of header */
static int hf_wtp_header_sub_pdu_size = HF_EMPTY;
static int hf_wtp_header_flag_continue = HF_EMPTY;
static int hf_wtp_header_pdu_type = HF_EMPTY;
static int hf_wtp_header_flag_Trailer = HF_EMPTY;
static int hf_wtp_header_flag_RID = HF_EMPTY;
static int hf_wtp_header_flag_TID = HF_EMPTY;
static int hf_wtp_header_flag_TID_response = HF_EMPTY;
/* These fields used by Invoke packets */
static int hf_wtp_header_Inv_version = HF_EMPTY;
static int hf_wtp_header_Inv_flag_TIDNew = HF_EMPTY;
static int hf_wtp_header_Inv_flag_UP = HF_EMPTY;
static int hf_wtp_header_Inv_Reserved = HF_EMPTY;
static int hf_wtp_header_Inv_TransactionClass = HF_EMPTY;
static int hf_wtp_header_variable_part = HF_EMPTY;
static int hf_wtp_data = HF_EMPTY;
static int hf_wtp_header_Ack_flag_TVETOK = HF_EMPTY;
static int hf_wtp_header_Abort_type = HF_EMPTY;
static int hf_wtp_header_Abort_reason_provider = HF_EMPTY;
static int hf_wtp_header_Abort_reason_user = HF_EMPTY;
static int hf_wtp_header_sequence_number = HF_EMPTY;
static int hf_wtp_header_missing_packets = HF_EMPTY;
/* These fields used when reassembling WTP fragments */
static int hf_wtp_fragments = HF_EMPTY;
static int hf_wtp_fragment = HF_EMPTY;
static int hf_wtp_fragment_overlap = HF_EMPTY;
static int hf_wtp_fragment_overlap_conflict = HF_EMPTY;
static int hf_wtp_fragment_multiple_tails = HF_EMPTY;
static int hf_wtp_fragment_too_long_fragment = HF_EMPTY;
static int hf_wtp_fragment_error = HF_EMPTY;
/* Initialize the subtree pointers */
static gint ett_wtp = ETT_EMPTY;
static gint ett_header = ETT_EMPTY;
static gint ett_wsp_fragments = ETT_EMPTY;
static gint ett_wtp_fragment = ETT_EMPTY;
fragment_items wtp_frag_items = {
&ett_wtp_fragment,
&ett_wsp_fragments,
&hf_wtp_fragments,
&hf_wtp_fragment,
&hf_wtp_fragment_overlap,
&hf_wtp_fragment_overlap_conflict,
&hf_wtp_fragment_multiple_tails,
&hf_wtp_fragment_too_long_fragment,
&hf_wtp_fragment_error,
"fragments"
};
/* Handle for WSP dissector */
static dissector_handle_t wsp_handle;
/*
* reassembly of WSP
*/
static GHashTable *wtp_fragment_table = NULL;
static void
wtp_defragment_init(void)
{
fragment_table_init(&wtp_fragment_table);
}
/*
* Extract some bitfields
*/
#define pdu_type(octet) (((octet) >> 3) & 0x0F) /* Note pdu type must not be 0x00 */
#define transaction_class(octet) ((octet) & 0x03) /* ......XX */
#define transmission_trailer(octet) (((octet) >> 1) & 0x01) /* ......X. */
static char retransmission_indicator(unsigned char octet)
{
switch ( pdu_type(octet) ) {
case INVOKE:
case RESULT:
case ACK:
case SEGMENTED_INVOKE:
case SEGMENTED_RESULT:
case NEGATIVE_ACK:
return octet & 0x01; /* .......X */
default:
return 0;
}
}
/* Code to actually dissect the packets */
static void
dissect_wtp_common(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
char szInfo[ 50 ];
int offCur = 0; /* current offset from start of WTP data */
/* bytes at offset 0 - 3 */
/*
unsigned char b0 = pd[offset + 0];
unsigned char b3 = pd[offset + 3];
*/
unsigned char b0;
/* continuation flag */
unsigned char fCon; /* Continue flag */
unsigned char fRID; /* Re-transmission indicator */
unsigned char fTTR = '\0'; /* Transmission trailer */
guint cbHeader = 0;
guint vHeader = 0;
int abortType = 0;
/* Set up structures we will need to add the protocol subtree and manage it */
proto_item *ti;
proto_tree *wtp_tree = NULL;
char pdut;
char clsTransaction = ' ';
int cchInfo;
int numMissing = 0; /* Number of missing packets in a negative ack */
int i;
tvbuff_t *wsp_tvb = NULL;
fragment_data *fd_head = NULL;
guint8 psn = 0; /* Packet sequence number */
guint16 TID = 0; /* Transaction-Id */
b0 = tvb_get_guint8 (tvb, offCur + 0);
/* Discover Concatenated PDUs */
if (b0 == 0) {
if (tree) {
ti = proto_tree_add_item(tree, proto_wtp, tvb, offCur, 1, bo_little_endian);
wtp_tree = proto_item_add_subtree(ti, ett_wtp);
}
offCur = 1;
i = 1;
while (offCur < (int) tvb_reported_length (tvb)) {
b0 = tvb_get_guint8 (tvb, offCur + 0);
if (b0 & 0x80) {
vHeader = 2;
cbHeader = ((b0 & 0x7f) << 8) |
tvb_get_guint8 (tvb, offCur + 1);
} else {
vHeader = 1;
cbHeader = b0;
}
if (tree) {
proto_tree_add_item(wtp_tree, hf_wtp_header_sub_pdu_size, tvb, offCur, vHeader, bo_big_endian);
}
if (i > 1 && check_col(pinfo->cinfo, COL_INFO)) {
col_append_str (pinfo->cinfo, COL_INFO, ", ");
}
wsp_tvb = tvb_new_subset(tvb, offCur + vHeader, -1, cbHeader);
dissect_wtp_common (wsp_tvb, pinfo, wtp_tree);
offCur += vHeader + cbHeader;
i++;
}
return;
}
fCon = b0 & 0x80;
fRID = retransmission_indicator( b0 );
pdut = pdu_type( b0 );
/* Develop the string to put in the Info column */
cchInfo = snprintf( szInfo, sizeof( szInfo ), "WTP %s",
val_to_str(pdut, vals_pdu_type, "Unknown PDU type 0x%x"));
switch( pdut ) {
case INVOKE:
fTTR = transmission_trailer( b0 );
TID = tvb_get_ntohs(tvb, offCur + 1);
psn = 0;
clsTransaction = transaction_class( tvb_get_guint8 (tvb, offCur + 3) );
snprintf( szInfo + cchInfo, sizeof( szInfo ) - cchInfo, " Class %d", clsTransaction );
cbHeader = 4;
break;
case SEGMENTED_INVOKE:
case SEGMENTED_RESULT:
fTTR = transmission_trailer( b0 );
TID = tvb_get_ntohs(tvb, offCur + 1);
psn = tvb_get_guint8(tvb, offCur + 3);
cbHeader = 4;
break;
case ABORT:
cbHeader = 4;
break;
case RESULT:
fTTR = transmission_trailer( b0 );
TID = tvb_get_ntohs(tvb, offCur + 1);
psn = 0;
cbHeader = 3;
break;
case ACK:
cbHeader = 3;
break;
case NEGATIVE_ACK:
/* Variable number of missing packets */
numMissing = tvb_get_guint8 (tvb, offCur + 3);
cbHeader = numMissing + 4;
break;
default:
break;
};
if( fRID ) {
strcat( szInfo, " R" );
};
if( fCon ) { /* Scan variable part (TPI's) */
unsigned char tCon;
unsigned char tByte;
do {
tByte = tvb_get_guint8(tvb, offCur + cbHeader + vHeader);
tCon = tByte & 0x80;
if (tByte & 0x04)
vHeader = vHeader + tvb_get_guint8(tvb,
offCur + cbHeader + vHeader + 1) + 2;
else
vHeader = vHeader + (tByte & 0x03) + 1;
} while (tCon);
}
#ifdef DEBUG
fprintf( stderr, "dissect_wtp: cbHeader = %d\n", cbHeader );
#endif
/* This field shows up as the "Info" column in the display; you should make
it, if possible, summarize what's in the packet, so that a user looking
at the list of packets can tell what type of packet it is. */
if (check_col(pinfo->cinfo, COL_INFO) &&
((tvb_length_remaining(tvb, offCur + cbHeader + vHeader) <= 0) ||
(pdut == ACK) || (pdut==NEGATIVE_ACK) || (pdut==ABORT)) ) {
#ifdef DEBUG
fprintf( stderr, "dissect_wtp: (6) About to set info_col header to %s\n", szInfo );
#endif
col_append_str(pinfo->cinfo, COL_INFO, szInfo );
};
/* In the interest of speed, if "tree" is NULL, don't do any work not
necessary to generate protocol tree items. */
if (tree) {
#ifdef DEBUG
fprintf( stderr, "dissect_wtp: cbHeader = %d\n", cbHeader );
#endif
ti = proto_tree_add_item(tree, proto_wtp, tvb, offCur, cbHeader + vHeader, bo_little_endian);
#ifdef DEBUG
fprintf( stderr, "dissect_wtp: (7) Returned from proto_tree_add_item\n" );
#endif
wtp_tree = proto_item_add_subtree(ti, ett_wtp);
/* Code to process the packet goes here */
{
#ifdef DEBUG
fprintf( stderr, "dissect_wtp: cbHeader = %d\n", cbHeader );
fprintf( stderr, "dissect_wtp: offCur = %d\n", offCur );
#endif
/* Add common items: only CON and PDU Type */
proto_tree_add_item(
wtp_tree, /* tree */
hf_wtp_header_flag_continue, /* id */
tvb,
offCur, /* start of high light */
1, /* length of high light */
b0 /* value */
);
proto_tree_add_item( wtp_tree, hf_wtp_header_pdu_type, tvb, offCur, 1, bo_little_endian );
switch( pdut ) {
case INVOKE:
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_Trailer, tvb, offCur, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_Inv_version , tvb, offCur + 3, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_Inv_flag_TIDNew, tvb, offCur + 3, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_Inv_flag_UP, tvb, offCur + 3, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_Inv_Reserved, tvb, offCur + 3, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_Inv_TransactionClass, tvb, offCur + 3, 1, bo_little_endian );
break;
case RESULT:
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_Trailer, tvb, offCur, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
break;
case ACK:
proto_tree_add_item( wtp_tree, hf_wtp_header_Ack_flag_TVETOK, tvb, offCur, 1, bo_big_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
break;
case ABORT:
abortType = tvb_get_guint8 (tvb, offCur) & 0x07;
proto_tree_add_item( wtp_tree, hf_wtp_header_Abort_type , tvb, offCur , 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
if (abortType == PROVIDER)
{
proto_tree_add_item( wtp_tree, hf_wtp_header_Abort_reason_provider , tvb, offCur + 3 , 1, bo_little_endian );
}
else if (abortType == USER)
{
proto_tree_add_item( wtp_tree, hf_wtp_header_Abort_reason_user , tvb, offCur + 3 , 1, bo_little_endian );
}
break;
case SEGMENTED_INVOKE:
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_Trailer, tvb, offCur, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_sequence_number , tvb, offCur + 3, 1, bo_little_endian );
break;
case SEGMENTED_RESULT:
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_Trailer, tvb, offCur, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_sequence_number , tvb, offCur + 3, 1, bo_little_endian );
break;
case NEGATIVE_ACK:
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_RID, tvb, offCur, 1, bo_little_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID_response, tvb, offCur + 1, 2, bo_big_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_flag_TID, tvb, offCur + 1, 2, bo_big_endian );
proto_tree_add_item( wtp_tree, hf_wtp_header_missing_packets , tvb, offCur + 3, 1, bo_little_endian );
/* Iterate through missing packets */
for (i=0; i<numMissing; i++)
{
proto_tree_add_item( wtp_tree, hf_wtp_header_sequence_number , tvb, offCur + i, 1, bo_little_endian );
}
break;
default:
break;
};
if( fCon ) {
/* There is a variable part if the Con flag is set */
proto_tree_add_bytes_format(
wtp_tree, /* tree */
hf_wtp_header_variable_part, /* id */
tvb,
offCur + cbHeader, /* start */
vHeader, /* length */
"What should go here!", /* value */
"Header (Variable part) %02X %02X %02X %02X", /* format */
0, 1, 2, 3
);
} else {
/* There is no variable part */
} /* End of variable part of header */
}
} else {
#ifdef DEBUG
fprintf( stderr, "dissect_wtp: (4) tree was %p\n", tree );
#endif
}
/*
* Any remaining data ought to be WSP data (if not WTP ACK, NACK
* or ABORT pdu), so hand off (defragmented) to the WSP dissector
*/
if ( (tvb_length_remaining(tvb, offCur + cbHeader + vHeader) > 0) &&
! ((pdut==ACK) || (pdut==NEGATIVE_ACK) || (pdut==ABORT)))
{
int dataOffset = offCur + cbHeader + vHeader;
guint32 dataLen = tvb_length_remaining(tvb, offCur + cbHeader + vHeader);
gboolean save_fragmented;
if ((pdut == SEGMENTED_INVOKE) || (pdut == SEGMENTED_RESULT) ||
(((pdut == INVOKE) || (pdut == RESULT)) && (!fTTR))) /* 1st part of segment */
{
save_fragmented = pinfo->fragmented;
pinfo->fragmented = TRUE;
fd_head = fragment_add_seq(tvb, dataOffset, pinfo, TID,
wtp_fragment_table, psn, dataLen, !fTTR);
if (fd_head != NULL) /* Reassembled */
{
wsp_tvb = tvb_new_real_data(fd_head->data,
fd_head->len,
fd_head->len);
tvb_set_child_real_data_tvbuff(tvb, wsp_tvb);
add_new_data_source(pinfo, wsp_tvb,
"Reassembled WTP");
pinfo->fragmented = FALSE;
/* show all fragments */
show_fragment_seq_tree(fd_head, &wtp_frag_items,
wtp_tree, pinfo, wsp_tvb);
call_dissector(wsp_handle, wsp_tvb, pinfo, tree);
}
else
{
if (check_col(pinfo->cinfo, COL_INFO)) /* Won't call WSP so display */
col_append_str(pinfo->cinfo, COL_INFO, szInfo );
}
pinfo->fragmented = save_fragmented;
}
else /* Normal packet, call next dissector */
{
wsp_tvb = tvb_new_subset(tvb, dataOffset, -1, dataLen);
call_dissector(wsp_handle, wsp_tvb, pinfo, tree);
}
}
}
/*
* Called directly from UDP.
* Put "WTP+WSP" into the "Protocol" column.
*/
static void
dissect_wtp_fromudp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "WTP+WSP" );
if (check_col(pinfo->cinfo, COL_INFO)) {
col_clear(pinfo->cinfo, COL_INFO);
}
dissect_wtp_common(tvb, pinfo, tree);
}
/*
* Called from a higher-level WAP dissector, presumably WTLS.
* Put "WTLS+WSP+WTP" to the "Protocol" column.
*
* XXX - is this supposed to be called from WTLS? If so, we're not
* calling it....
*
* XXX - can this be called from any other dissector?
*/
static void
dissect_wtp_fromwap(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
{
if (check_col(pinfo->cinfo, COL_PROTOCOL))
col_set_str(pinfo->cinfo, COL_PROTOCOL, "WTLS+WTP+WSP" );
if (check_col(pinfo->cinfo, COL_INFO)) {
col_clear(pinfo->cinfo, COL_INFO);
}
dissect_wtp_common(tvb, pinfo, tree);
}
/* Register the protocol with Ethereal */
void
proto_register_wtp(void)
{
/* Setup list of header fields */
static hf_register_info hf[] = {
{ &hf_wtp_header_sub_pdu_size,
{ "Sub PDU size",
"wtp.sub_pdu_size",
FT_BYTES, BASE_HEX, NULL, 0x0,
"Size of Sub-PDU", HFILL
}
},
{ &hf_wtp_header_flag_continue,
{ "Continue Flag",
"wtp.continue_flag",
FT_BOOLEAN, 8, TFS( &continue_truth ), 0x80,
"Continue Flag", HFILL
}
},
{ &hf_wtp_header_pdu_type,
{ "PDU Type",
"wtp.pdu_type",
FT_UINT8, BASE_HEX, VALS( vals_pdu_type ), 0x78,
"PDU Type", HFILL
}
},
{ &hf_wtp_header_flag_Trailer,
{ "Trailer Flags",
"wtp.trailer_flags",
FT_UINT8, BASE_HEX, VALS( vals_transaction_trailer ), 0x06,
"Trailer Flags", HFILL
}
},
{ &hf_wtp_header_flag_RID,
{ "Re-transmission Indicator",
"wtp.RID",
FT_BOOLEAN, 8, TFS( &RID_truth ), 0x01,
"Re-transmission Indicator", HFILL
}
},
{ &hf_wtp_header_flag_TID_response,
{ "TID Response",
"wtp.TID.response",
FT_BOOLEAN, 16, TFS( &tid_response_truth ), 0x8000,
"TID Response", HFILL
}
},
{ &hf_wtp_header_flag_TID,
{ "Transaction ID",
"wtp.TID",
FT_UINT16, BASE_HEX, NULL, 0x7FFF,
"Transaction ID", HFILL
}
},
{ &hf_wtp_header_Inv_version,
{ "Version",
"wtp.header.version",
FT_UINT8, BASE_HEX, VALS( vals_version ), 0xC0,
"Version", HFILL
}
},
{ &hf_wtp_header_Inv_flag_TIDNew,
{ "TIDNew",
"wtp.header.TIDNew",
FT_BOOLEAN, 8, TFS( &TIDNew_truth ), 0x20,
"TIDNew", HFILL
}
},
{ &hf_wtp_header_Inv_flag_UP,
{ "U/P flag",
"wtp.header.UP",
FT_BOOLEAN, 8, TFS( &UP_truth ), 0x10,
"U/P Flag", HFILL
}
},
{ &hf_wtp_header_Inv_Reserved,
{ "Reserved",
"wtp.inv.reserved",
FT_UINT8, BASE_HEX, NULL, 0x0C,
"Reserved", HFILL
}
},
{ &hf_wtp_header_Inv_TransactionClass,
{ "Transaction Class",
"wtp.inv.transaction_class",
FT_UINT8, BASE_HEX, VALS( vals_transaction_classes ), 0x03,
"Transaction Class", HFILL
}
},
{ &hf_wtp_header_Ack_flag_TVETOK,
{ "Tve/Tok flag",
"wtp.ack.tvetok",
FT_BOOLEAN, 8, TFS( &TVETOK_truth ), 0x04,
"Tve/Tok flag", HFILL
}
},
{ &hf_wtp_header_Abort_type,
{ "Abort Type",
"wtp.abort.type",
FT_UINT8, BASE_HEX, VALS ( vals_abort_type ), 0x07,
"Abort Type", HFILL
}
},
{ &hf_wtp_header_Abort_reason_provider,
{ "Abort Reason",
"wtp.abort.reason.provider",
FT_UINT8, BASE_HEX, VALS ( vals_abort_reason_provider ), 0x00,
"Abort Reason", HFILL
}
},
/* Assume WSP is the user and use its reason codes */
{ &hf_wtp_header_Abort_reason_user,
{ "Abort Reason",
"wtp.abort.reason.user",
FT_UINT8, BASE_HEX, VALS ( vals_wsp_reason_codes ), 0x00,
"Abort Reason", HFILL
}
},
{ &hf_wtp_header_sequence_number,
{ "Packet Sequence Number",
"wtp.header.sequence",
FT_UINT8, BASE_HEX, NULL, 0x00,
"Packet Sequence Number", HFILL
}
},
{ &hf_wtp_header_missing_packets,
{ "Missing Packets",
"wtp.header.missing_packets",
FT_UINT8, BASE_HEX, NULL, 0x00,
"Missing Packets", HFILL
}
},
{ &hf_wtp_header_variable_part,
{ "Header: Variable part",
"wtp.header_variable_part",
FT_BYTES, BASE_HEX, NULL, 0x0,
"Variable part of the header", HFILL
}
},
{ &hf_wtp_data,
{ "Data",
"wtp.header_data",
FT_BYTES, BASE_HEX, NULL, 0x0,
"Data", HFILL
}
},
/* Fragment fields */
{ &hf_wtp_fragment_overlap,
{ "Fragment overlap",
"wtp.fragment.overlap",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"Fragment overlaps with other fragments", HFILL
}
},
{ &hf_wtp_fragment_overlap_conflict,
{ "Conflicting data in fragment overlap",
"wtp.fragment.overlap.conflict",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"Overlapping fragments contained conflicting data", HFILL
}
},
{ &hf_wtp_fragment_multiple_tails,
{ "Multiple tail fragments found",
"wtp.fragment.multipletails",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"Several tails were found when defragmenting the packet", HFILL
}
},
{ &hf_wtp_fragment_too_long_fragment,
{ "Fragment too long",
"wtp.fragment.toolongfragment",
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
"Fragment contained data past end of packet", HFILL
}
},
{ &hf_wtp_fragment_error,
{ "Defragmentation error",
"wtp.fragment.error",
FT_NONE, BASE_NONE, NULL, 0x0,
"Defragmentation error due to illegal fragments", HFILL
}
},
{ &hf_wtp_fragment,
{ "WTP Fragment",
"wtp.fragment",
FT_NONE, BASE_NONE, NULL, 0x0,
"WTP Fragment", HFILL
}
},
{ &hf_wtp_fragments,
{ "WTP Fragments",
"wtp.fragments",
FT_NONE, BASE_NONE, NULL, 0x0,
"WTP Fragments", HFILL
}
},
};
/* Setup protocol subtree array */
static gint *ett[] = {
&ett_wtp,
&ett_header,
&ett_wsp_fragments,
&ett_wtp_fragment,
};
/* Register the protocol name and description */
proto_wtp = proto_register_protocol(
"Wireless Transaction Protocol", /* protocol name for use by ethereal */
"WTP", /* short version of name */
"wap-wsp-wtp" /* Abbreviated protocol name, should Match IANA
< URL:http://www.isi.edu/in-notes/iana/assignments/port-numbers/ >
*/
);
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array(proto_wtp, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
register_dissector("wtp", dissect_wtp_fromwap, proto_wtp);
register_dissector("wtp-udp", dissect_wtp_fromudp, proto_wtp);
register_init_routine(wtp_defragment_init);
};
void
proto_reg_handoff_wtp(void)
{
dissector_handle_t wtp_fromudp_handle;
/*
* Get a handle for the connection-oriented WSP dissector - if WTP
* PDUs have data, it is WSP.
*/
wsp_handle = find_dissector("wsp-co");
wtp_fromudp_handle = find_dissector("wtp-udp");
dissector_add("udp.port", UDP_PORT_WTP_WSP, wtp_fromudp_handle);
}
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