/* packet-wtp.c * * Routines to dissect WTP component of WAP traffic. * * $Id: packet-wtp.c,v 1.36 2002/07/17 00:42:43 guy Exp $ * * Ethereal - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * WAP dissector based on original work by Ben Fowler * Updated by Neil Hunter * 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 #include #ifdef HAVE_SYS_TYPES_H # include #endif #ifdef HAVE_NETINET_IN_H # include #endif #ifdef NEED_SNPRINTF_H # include "snprintf.h" #endif #include #include #include #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 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); }