2d1bb39121
there are many reasons why some protocols actually need to be able to access the pinfo structure while determining the pdu size svn path=/trunk/; revision=19751
1426 lines
33 KiB
C
1426 lines
33 KiB
C
/* packet-icep.c
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* Routines for "The ICE Protocol" dissection
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* Copyright 2004 _FF_
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* Francesco Fondelli <fondelli dot francesco, tiscali dot it>
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*
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* $Id$
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald@wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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/*
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TODO:
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1) Dissect encoded data (do sth like idl2wrs for CORBA).
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2) Add conversations.
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3) Register a dissector as one that can be selected by a UDP/TCP port number.
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4) Put in Preferences/Protocols/ICEP Option menu:
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- ICEP_MAX_ICE_STRING_LEN
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- ICEP_MAX_BATCH_REQUESTS
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- ICEP_MAX_ICE_CONTEXT_PAIRS
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*/
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/*
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NOTES:
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1) p. 586 Chapter 23.2 of "The ICE Protocol"
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"Data is always encoded using little-endian byte order for numeric types."
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2) Informations about Ice can be found here: http://www.zeroc.com
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include <epan/emem.h>
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#include "packet-tcp.h"
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#if 0
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#define DBG(str, args...) do {\
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fprintf(stdout, \
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"[%s][%s][%d]: ",\
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__FILE__, \
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__FUNCTION__, \
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__LINE__); \
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fflush(stdout); \
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fprintf(stdout, str, ## args); \
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} while (0)
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#else
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#define DBG0(format)
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#define DBG1(format, arg1)
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#define DBG2(format, arg1, arg2)
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#endif /* 0/1 */
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/* fixed values taken from the standard */
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static const guint8 icep_magic[] = { 'I', 'c', 'e', 'P' };
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#define ICEP_HEADER_SIZE 14
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#define ICEP_MIN_REPLY_SIZE 5
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#define ICEP_MIN_PARAMS_SIZE 6
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#define ICEP_MIN_COMMON_REQ_HEADER_SIZE 13
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/* values derived from common sense */
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#define ICEP_MAX_BATCH_REQUESTS 64
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#define ICEP_MAX_ICE_STRING_LEN 512
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#define ICEP_MAX_ICE_CONTEXT_PAIRS 64
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/* Initialize the protocol and registered fields */
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static int proto_icep = -1;
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/* Message Header */
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static int hf_icep_protocol_major = -1;
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static int hf_icep_protocol_minor = -1;
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static int hf_icep_encoding_major = -1;
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static int hf_icep_encoding_minor = -1;
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static int hf_icep_message_type = -1;
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static int hf_icep_compression_status = -1;
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static int hf_icep_message_size = -1;
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/* [Batch] Request Message Body */
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static int hf_icep_request_id = -1;
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static int hf_icep_id_name = -1;
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static int hf_icep_id_category = -1;
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static int hf_icep_facet = -1;
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static int hf_icep_operation = -1;
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static int hf_icep_mode = -1;
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static int hf_icep_context = -1;
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static int hf_icep_params_size = -1;
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static int hf_icep_params_major = -1;
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static int hf_icep_params_minor = -1;
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/* Reply Message Body */
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static int hf_icep_reply_status = -1;
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/* Initialize the subtree pointers */
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static gint ett_icep = -1;
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static gint ett_icep_msg = -1;
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static const value_string icep_msgtype_vals[] = {
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{0x0, "Request"},
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{0x1, "Batch request"},
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{0x2, "Reply"},
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{0x3, "Validate connection"},
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{0x4, "Close connection"},
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{0, NULL}
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};
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static const value_string icep_zipstatus_vals[] = {
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{0x0, "Uncompressed, sender cannot accept a compressed reply"},
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{0x1, "Uncompressed, sender can accept a compressed reply"},
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{0x2, "Compressed, sender can accept a compressed reply"},
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{0, NULL}
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};
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static const value_string icep_replystatus_vals[] = {
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{0x0, "Success"},
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{0x1, "User exception"},
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{0x2, "Object does not exist"},
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{0x3, "Facet does not exist"},
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{0x4, "Operation does not exist"},
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{0x5, "Unknown Ice local exception"},
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{0x6, "Unknown Ice user exception"},
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{0x7, "Unknown exception"},
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{0, NULL}
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};
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static const value_string icep_mode_vals[] = {
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{0x0, "normal"},
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{0x1, "nonmutating"},
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{0x2, "idempotent"},
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{0, NULL}
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};
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static packet_info *mypinfo;
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/*
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* This function dissects an "Ice string", adds hf to "tree" and returns consumed
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* bytes in "*consumed", if errors "*consumed" is -1.
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*
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* "*dest" is a null terminated version of the dissected Ice string.
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*/
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static void dissect_ice_string(proto_tree *tree, int hf_icep,
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tvbuff_t *tvb, guint32 offset, gint32 *consumed,
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char **dest, gboolean add_hf)
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{
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/* p. 586 chapter 23.2.1 and p. 588 chapter 23.2.5
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* string == Size + content
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* string = 1byte (0..254) + string not null terminated
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* or
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* string = 1byte (255) + 1int (255..2^32-1) + string not null terminated
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*/
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guint32 Size = 0;
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char *s = NULL;
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(*consumed) = 0;
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/* check for first byte */
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if ( !tvb_bytes_exist(tvb, offset, 1) ) {
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if (tree)
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proto_tree_add_text(tree, tvb, offset, -1,
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"1st byte of Size missing");
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if ( check_col(mypinfo->cinfo, COL_INFO) ) {
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col_append_str(mypinfo->cinfo, COL_INFO,
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" (1st byte of Size missing)");
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}
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(*consumed) = -1;
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return;
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}
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/* get the Size */
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Size = tvb_get_guint8(tvb, offset);
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offset++;
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(*consumed)++;
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if ( Size == 255 ) {
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/* check for next 4 bytes */
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if ( !tvb_bytes_exist(tvb, offset, 4) ) {
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if (tree)
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proto_tree_add_text(tree, tvb, offset, -1,
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"second field of Size missing");
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if ( check_col(mypinfo->cinfo, COL_INFO) ) {
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col_append_str(mypinfo->cinfo, COL_INFO,
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" (second field of Size missing)");
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}
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(*consumed) = -1;
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return;
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}
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/* get second field of Size */
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Size = tvb_get_letohl(tvb, offset);
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offset += 4;
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(*consumed) += 4;
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}
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DBG1("string.Size --> %d\n", Size);
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/* check if the string exists */
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if ( !tvb_bytes_exist(tvb, offset, Size) ) {
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if (tree)
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proto_tree_add_text(tree, tvb, offset, -1,
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"missing or truncated string");
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if ( check_col(mypinfo->cinfo, COL_INFO) ) {
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col_append_str(mypinfo->cinfo, COL_INFO,
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" (missing or truncated string)");
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}
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(*consumed) = -1;
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return;
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}
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if ( Size > ICEP_MAX_ICE_STRING_LEN ) {
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if (tree)
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proto_tree_add_text(tree, tvb, offset, -1, "string too long");
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if ( check_col(mypinfo->cinfo, COL_INFO) ) {
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col_append_str(mypinfo->cinfo, COL_INFO,
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" (string too long)");
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}
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(*consumed) = -1;
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return;
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}
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if ( Size != 0 ) {
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s = tvb_get_ephemeral_string(tvb, offset, Size);
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if (tree && add_hf)
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proto_tree_add_string(tree, hf_icep, tvb, offset, Size, s);
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} else {
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s = g_strdup("(empty)");
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/* display the 0x00 Size byte when click on a empty ice_string */
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if (tree && add_hf)
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proto_tree_add_string(tree, hf_icep, tvb, offset - 1, 1, s);
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}
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if ( dest != NULL )
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*dest = s;
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offset += Size;
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(*consumed) += Size;
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return;
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}
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/*
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* This function dissects an "Ice facet", adds hf(s) to "tree" and returns consumed
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* bytes in "*consumed", if errors "*consumed" is -1.
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*/
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static void dissect_ice_facet(proto_tree *tree, int hf_icep,
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tvbuff_t *tvb, guint32 offset, gint32 *consumed)
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{
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/* p. 588, chapter 23.2.6:
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* "facet" is a StringSeq, a StringSeq is a:
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* sequence<string>
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*
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*
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* sequence == Size + SizeElements
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* sequence = 1byte (0..254) + SizeElements
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* or
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* sequence = 1byte (255) + 1int (255..2^32-1) + SizeElements
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*
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*
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* p.613. chapter 23.3.2
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* "facet has either zero elements (empty) or one element"
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*
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*
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*/
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guint32 Size = 0; /* number of elements in the sequence */
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char *s = NULL;
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(*consumed) = 0;
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/* check first byte */
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if ( !tvb_bytes_exist(tvb, offset, 1) ) {
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if (tree)
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proto_tree_add_text(tree, tvb, offset, -1, "facet field missing");
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if ( check_col(mypinfo->cinfo, COL_INFO) ) {
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col_append_str(mypinfo->cinfo, COL_INFO,
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" (facet field missing)");
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}
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(*consumed) = -1;
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return;
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}
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/* get first byte of Size */
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Size = tvb_get_guint8(tvb, offset);
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offset++;
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(*consumed)++;
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if ( Size == 0 ) {
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if (tree) {
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s = ep_strdup( "(empty)" );
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/* display the 0x00 Size byte when click on a empty ice_string */
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proto_tree_add_string(tree, hf_icep, tvb, offset - 1, 1, s);
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}
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return;
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}
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if ( Size == 1 ) {
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gint32 consumed_facet = 0;
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dissect_ice_string(tree, hf_icep, tvb, offset, &consumed_facet, NULL, TRUE);
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if ( consumed_facet == -1 ) {
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(*consumed) = -1;
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return;
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}
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offset += consumed_facet;
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(*consumed) += consumed_facet;
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return;
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}
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/* if here => Size > 1 => not possible */
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if (tree)
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/* display the XX Size byte when click here */
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proto_tree_add_text(tree, tvb, offset - 1, 1,
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"facet can be max one element");
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if ( check_col(mypinfo->cinfo, COL_INFO) ) {
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col_append_str(mypinfo->cinfo, COL_INFO,
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" (facet can be max one element)");
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}
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(*consumed) = -1;
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return;
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}
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/*
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* This function dissects an "Ice context", adds hf(s) to "tree" and returns consumed
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* bytes in "*consumed", if errors "*consumed" is -1.
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*/
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static void dissect_ice_context(proto_tree *tree, tvbuff_t *tvb, guint32 offset,
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gint32 *consumed)
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{
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/* p. 588, chapter 23.2.7 and p. 613, 23.3.2:
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* "context" is a dictionary<string, string>
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*
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* dictionary<string, string> == Size + SizeKeyValuePairs
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* dictionary<string, string> = 1byte (0..254) + SizeKeyValuePairs
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* or
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* dictionary<string, string>= 1byte (255) + 1int (255..2^32-1)+SizeKeyValuePairs
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*
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*/
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guint32 Size = 0; /* number of key-value in the dictionary */
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guint32 i = 0;
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char *s = NULL;
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(*consumed) = 0;
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/* check first byte */
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if ( !tvb_bytes_exist(tvb, offset, 1) ) {
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if (tree)
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proto_tree_add_text(tree, tvb, offset, -1, "context missing");
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if ( check_col(mypinfo->cinfo, COL_INFO) ) {
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col_append_str(mypinfo->cinfo, COL_INFO,
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" (context missing)");
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}
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(*consumed) = -1;
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return;
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}
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/* get first byte of Size */
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Size = tvb_get_guint8(tvb, offset);
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offset++;
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(*consumed)++;
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if ( Size == 255 ) {
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/* check for next 4 bytes */
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if ( !tvb_bytes_exist(tvb, offset, 4) ) {
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if (tree)
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proto_tree_add_text(tree, tvb, offset, -1,
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"second field of Size missing");
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if ( check_col(mypinfo->cinfo, COL_INFO) ) {
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col_append_str(mypinfo->cinfo, COL_INFO,
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" (second field of Size missing)");
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}
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(*consumed) = -1;
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return;
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}
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/* get second field of Size */
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Size = tvb_get_letohl(tvb, offset);
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offset += 4;
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(*consumed) += 4;
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}
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DBG1("context.Size --> %d\n", Size);
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if ( Size > ICEP_MAX_ICE_CONTEXT_PAIRS ) {
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if (tree)
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/* display the XX Size byte when click here */
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proto_tree_add_text(tree, tvb, offset - 1, 1, "too long context");
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if ( check_col(mypinfo->cinfo, COL_INFO) ) {
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col_append_str(mypinfo->cinfo, COL_INFO,
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" (too long context)");
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}
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(*consumed) = -1;
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return;
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}
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if (Size == 0) {
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s = "(empty)";
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/* display the 0x00 Size byte when click on a empty context */
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if (tree)
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proto_tree_add_string(tree, hf_icep_context, tvb, offset - 1, 1, s);
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return;
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}
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|
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/* looping through the dictionary */
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for ( i = 0; i < Size; i++ ) {
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/* key */
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gint32 consumed_key = 0;
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char *str_key = NULL;
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/* value */
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gint32 consumed_value = 0;
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char *str_value = NULL;
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|
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DBG1("looping through context dictionary, loop #%d\n", i);
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dissect_ice_string(tree, -1, tvb, offset, &consumed_key,
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&str_key, FALSE);
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if ( consumed_key == -1 ) {
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(*consumed) = -1;
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return;
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}
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offset += consumed_key;
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(*consumed) += consumed_key;
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dissect_ice_string(tree, -1, tvb, offset, &consumed_value,
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&str_value, FALSE);
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|
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if ( consumed_value == -1 ) {
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(*consumed) = -1;
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return;
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}
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|
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offset += consumed_value;
|
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(*consumed) += consumed_value;
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|
|
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if (tree && str_value && str_key) {
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|
|
proto_tree_add_text(tree, tvb,
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offset - (consumed_key + consumed_value) - 1,
|
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(consumed_key + consumed_value) + 1,
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"Invocation Context: %s/%s",
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str_key, str_value);
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}
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|
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}
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}
|
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|
|
/*
|
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* This function dissects an "Ice params", adds hf(s) to "tree" and returns consumed
|
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* bytes in "*consumed", if errors "*consumed" is -1.
|
|
*/
|
|
static void dissect_ice_params(proto_tree *tree, tvbuff_t *tvb,
|
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guint32 offset, gint32 *consumed)
|
|
{
|
|
/* p. 612, chapter 23.3.2 and p. 587, 23.2.2:
|
|
* "params" is an Encapsulation
|
|
*
|
|
* struct Encapsulation {
|
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* int size;
|
|
* byte major;
|
|
* byte minor;
|
|
* //(size - 6) bytes of data
|
|
* }
|
|
*
|
|
*/
|
|
|
|
gint32 size = 0;
|
|
gint tvb_data_remained = 0;
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|
|
|
(*consumed) = 0;
|
|
|
|
/* check first 6 bytes */
|
|
if ( !tvb_bytes_exist(tvb, offset, ICEP_MIN_PARAMS_SIZE) ) {
|
|
|
|
if (tree)
|
|
proto_tree_add_text(tree, tvb, offset, -1, "params missing");
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_str(mypinfo->cinfo, COL_INFO,
|
|
" (params missing)");
|
|
}
|
|
|
|
(*consumed) = -1;
|
|
return;
|
|
}
|
|
|
|
/* get the size */
|
|
size = tvb_get_letohl(tvb, offset);
|
|
|
|
DBG1("params.size --> %d\n", size);
|
|
|
|
if ( size < ICEP_MIN_PARAMS_SIZE ) {
|
|
|
|
if (tree)
|
|
proto_tree_add_text(tree, tvb, offset, 4,
|
|
"params size too small");
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_str(mypinfo->cinfo, COL_INFO,
|
|
" (params size too small)");
|
|
}
|
|
|
|
(*consumed) = -1;
|
|
return;
|
|
}
|
|
|
|
if ( tree ) {
|
|
|
|
proto_tree_add_item(tree, hf_icep_params_size, tvb, offset, 4, TRUE);
|
|
offset += 4;
|
|
(*consumed) += 4;
|
|
|
|
proto_tree_add_item(tree, hf_icep_params_major, tvb, offset, 1, TRUE);
|
|
offset += 1;
|
|
(*consumed)++;
|
|
|
|
proto_tree_add_item(tree, hf_icep_params_minor, tvb, offset, 1, TRUE);
|
|
offset += 1;
|
|
(*consumed)++;
|
|
|
|
} else {
|
|
/* skipp size, major, minor */
|
|
offset += 6;
|
|
(*consumed) += 6;
|
|
}
|
|
|
|
if( size == ICEP_MIN_PARAMS_SIZE ) /* no encapsulatd data present, it's normal */
|
|
return;
|
|
|
|
/* check if I got all encapsulated data */
|
|
tvb_data_remained = tvb_reported_length_remaining(tvb, offset);
|
|
|
|
if ( tvb_data_remained < ( size - ICEP_MIN_PARAMS_SIZE ) ) {
|
|
|
|
if (tree)
|
|
proto_tree_add_text(tree, tvb, offset, -1,
|
|
"missing encapsulated data (%d bytes)",
|
|
size
|
|
- ICEP_MIN_PARAMS_SIZE
|
|
- tvb_data_remained);
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_fstr(mypinfo->cinfo, COL_INFO,
|
|
" (missing encapsulated data (%d bytes))",
|
|
size
|
|
- ICEP_MIN_PARAMS_SIZE
|
|
- tvb_data_remained);
|
|
}
|
|
|
|
(*consumed) = -1;
|
|
return;
|
|
}
|
|
|
|
/* encapsulated params */
|
|
|
|
if (tree) {
|
|
proto_tree_add_text(tree, tvb, offset, (size - ICEP_MIN_PARAMS_SIZE),
|
|
"Encapsulated parameters (%d bytes)",
|
|
(size - ICEP_MIN_PARAMS_SIZE));
|
|
}
|
|
|
|
(*consumed) += (size - ICEP_MIN_PARAMS_SIZE);
|
|
}
|
|
|
|
static void dissect_icep_request_common(tvbuff_t *tvb, guint32 offset,
|
|
proto_tree *icep_sub_tree, gint32 *total_consumed)
|
|
{
|
|
/* p. 613, chapter 23.3.3 and p. 612 chapter 23.3.2:
|
|
* Request and BatchRequest differ only in the first 4 bytes (requestID)
|
|
* so them share this part
|
|
*
|
|
* Ice::Identity id;
|
|
* Ice::StringSeq facet;
|
|
* string operation;
|
|
* byte mode;
|
|
* Ice::Context context;
|
|
* Encapsulation params;
|
|
* }
|
|
*/
|
|
|
|
gint32 consumed = 0;
|
|
char *namestr = NULL;
|
|
char *opstr = NULL;
|
|
|
|
(*total_consumed) = 0;
|
|
|
|
/* check common header (i.e. the batch request one)*/
|
|
if ( !tvb_bytes_exist(tvb, offset, ICEP_MIN_COMMON_REQ_HEADER_SIZE) ) {
|
|
|
|
if (icep_sub_tree)
|
|
proto_tree_add_text(icep_sub_tree, tvb, offset, -1,
|
|
"too short header");
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_str(mypinfo->cinfo, COL_INFO,
|
|
" (too short header)");
|
|
}
|
|
|
|
goto error;
|
|
}
|
|
|
|
/* got at least 15 bytes */
|
|
|
|
/* "id" is a:
|
|
* struct Identity {
|
|
* string name;
|
|
* string category;
|
|
* }
|
|
*/
|
|
|
|
dissect_ice_string(icep_sub_tree, hf_icep_id_name, tvb, offset,
|
|
&consumed, &namestr, TRUE);
|
|
|
|
if ( consumed == -1 )
|
|
goto error;
|
|
|
|
offset += consumed; DBG1("consumed --> %d\n", consumed);
|
|
(*total_consumed) += consumed;
|
|
|
|
|
|
dissect_ice_string(icep_sub_tree, hf_icep_id_category, tvb, offset,
|
|
&consumed, NULL, TRUE);
|
|
|
|
if ( consumed == -1 )
|
|
goto error;
|
|
|
|
offset += consumed; DBG1("consumed --> %d\n", consumed);
|
|
(*total_consumed) += consumed;
|
|
|
|
|
|
/* "facet" is a:
|
|
* sequence<string> StringSeq
|
|
*
|
|
*/
|
|
|
|
dissect_ice_facet(icep_sub_tree, hf_icep_facet, tvb, offset, &consumed);
|
|
|
|
if ( consumed == -1 )
|
|
goto error;
|
|
|
|
offset += consumed; DBG1("consumed --> %d\n", consumed);
|
|
(*total_consumed) += consumed;
|
|
|
|
/* "operation" is an ice_string
|
|
*
|
|
*/
|
|
|
|
dissect_ice_string(icep_sub_tree, hf_icep_operation, tvb, offset,
|
|
&consumed, &opstr, TRUE);
|
|
|
|
if ( consumed == -1 )
|
|
goto error;
|
|
else {
|
|
offset += consumed; DBG1("consumed --> %d\n", consumed);
|
|
(*total_consumed) += consumed;
|
|
|
|
if ( opstr && namestr ) {
|
|
DBG2("operation --> %s.%s()\n", namestr, opstr);
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_fstr(mypinfo->cinfo, COL_INFO, " %s.%s()",
|
|
namestr, opstr);
|
|
}
|
|
opstr = NULL;
|
|
namestr = NULL;
|
|
}
|
|
}
|
|
|
|
/* check and get mode byte */
|
|
if ( !tvb_bytes_exist(tvb, offset, 1) ) {
|
|
|
|
if (icep_sub_tree)
|
|
proto_tree_add_text(icep_sub_tree, tvb, offset, -1,
|
|
"mode field missing");
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_str(mypinfo->cinfo, COL_INFO,
|
|
" (mode field missing)");
|
|
}
|
|
|
|
goto error;
|
|
}
|
|
|
|
if (icep_sub_tree)
|
|
proto_tree_add_item(icep_sub_tree, hf_icep_mode, tvb, offset, 1, TRUE);
|
|
|
|
offset++; DBG0("consumed --> 1\n");
|
|
(*total_consumed)++;
|
|
|
|
|
|
/* "context" is a dictionary<string, string>
|
|
*
|
|
*/
|
|
|
|
dissect_ice_context(icep_sub_tree, tvb, offset, &consumed);
|
|
|
|
if ( consumed == -1 )
|
|
goto error;
|
|
|
|
offset += consumed; DBG1("consumed --> %d\n", consumed);
|
|
(*total_consumed) += consumed;
|
|
|
|
/* "params" is a Encapsulation
|
|
*
|
|
*/
|
|
|
|
dissect_ice_params(icep_sub_tree, tvb, offset, &consumed);
|
|
|
|
if ( consumed == -1 )
|
|
goto error;
|
|
|
|
offset += consumed; DBG1("consumed --> %d\n", consumed);
|
|
(*total_consumed) += consumed;
|
|
|
|
return;
|
|
|
|
error:
|
|
(*total_consumed) = -1;
|
|
}
|
|
|
|
|
|
static void dissect_icep_request(tvbuff_t *tvb, guint32 offset, proto_tree *icep_tree)
|
|
{
|
|
/* p. 612, chapter 23.3.2:
|
|
*
|
|
* struct RequestData {
|
|
* int requestID;
|
|
* Ice::Identity id;
|
|
* Ice::StringSeq facet;
|
|
* string operation;
|
|
* byte mode;
|
|
* Ice::Context context;
|
|
* Encapsulation params;
|
|
* }
|
|
*/
|
|
|
|
proto_item *ti = NULL;
|
|
proto_tree *icep_sub_tree = NULL;
|
|
gint32 consumed = 0;
|
|
guint32 reqid = 0;
|
|
|
|
DBG0("dissect request\n");
|
|
|
|
/* check for req id */
|
|
if ( !tvb_bytes_exist(tvb, offset, 4) ) {
|
|
|
|
if (icep_tree)
|
|
proto_tree_add_text(icep_tree, tvb, offset, -1,
|
|
"too short header");
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_str(mypinfo->cinfo, COL_INFO,
|
|
" (too short header)");
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/* got at least 4 bytes */
|
|
|
|
/* create display subtree for this message type */
|
|
|
|
reqid = tvb_get_letohl(tvb, offset);
|
|
|
|
if (icep_tree) {
|
|
|
|
ti = proto_tree_add_text(icep_tree, tvb, offset, -1,
|
|
"Request Message Body");
|
|
|
|
icep_sub_tree = proto_item_add_subtree(ti, ett_icep_msg);
|
|
|
|
proto_tree_add_item(icep_sub_tree, hf_icep_request_id, tvb, offset, 4,
|
|
TRUE);
|
|
|
|
}
|
|
|
|
if ( reqid != 0 ) {
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_fstr(mypinfo->cinfo, COL_INFO, "(%d):",
|
|
tvb_get_letohl(tvb, offset));
|
|
}
|
|
} else
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_str(mypinfo->cinfo, COL_INFO, "(oneway):");
|
|
}
|
|
|
|
|
|
offset += 4;
|
|
DBG0("consumed --> 4\n");
|
|
|
|
dissect_icep_request_common(tvb, offset, icep_sub_tree, &consumed);
|
|
|
|
if ( consumed == -1 )
|
|
return;
|
|
|
|
offset += consumed;
|
|
DBG1("consumed --> %d\n", consumed);
|
|
}
|
|
|
|
|
|
|
|
static void dissect_icep_batch_request(tvbuff_t *tvb, guint32 offset,
|
|
proto_tree *icep_tree)
|
|
{
|
|
/* p. 613, chapter 23.3.3
|
|
* A batch request msg is a "sequence" of batch request
|
|
* Sequence is Size + elements
|
|
*
|
|
* struct BatchRequestData {
|
|
* Ice::Identity id;
|
|
* Ice::StringSeq facet;
|
|
* string operation;
|
|
* byte mode;
|
|
* Ice::Context context;
|
|
* Encapsulation params;
|
|
* }
|
|
*
|
|
* NOTE!!!:
|
|
* The only real implementation of the Ice protocol puts a 32bit count in front
|
|
* of a Batch Request, *not* an Ice::Sequence (as the standard says). Basically the
|
|
* same people wrote both code and standard so I'll follow the code.
|
|
*/
|
|
|
|
proto_item *ti = NULL;
|
|
proto_tree *icep_sub_tree = NULL;
|
|
guint32 num_reqs = 0;
|
|
guint32 i = 0;
|
|
gint32 consumed = 0;
|
|
|
|
DBG0("dissect batch request\n");
|
|
|
|
/* check for first 4 byte */
|
|
if ( !tvb_bytes_exist(tvb, offset, 4) ) {
|
|
|
|
if (icep_tree)
|
|
proto_tree_add_text(icep_tree, tvb, offset, -1,
|
|
"counter of batch requests missing");
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_str(mypinfo->cinfo, COL_INFO,
|
|
" (counter of batch requests missing)");
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
num_reqs = tvb_get_letohl(tvb, offset);
|
|
offset += 4;
|
|
|
|
DBG1("batch_requests.count --> %d\n", num_reqs);
|
|
|
|
if ( num_reqs > ICEP_MAX_BATCH_REQUESTS ) {
|
|
|
|
if (icep_tree)
|
|
proto_tree_add_text(icep_tree, tvb, offset, -1,
|
|
"too many batch requests (%d)", num_reqs);
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_fstr(mypinfo->cinfo, COL_INFO,
|
|
" (too many batch requests, %d)",
|
|
num_reqs);
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
if ( num_reqs == 0 ) {
|
|
|
|
if (icep_tree)
|
|
proto_tree_add_text(icep_tree, tvb, offset, -1,
|
|
"empty batch requests sequence");
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_fstr(mypinfo->cinfo, COL_INFO,
|
|
" (empty batch requests sequence)");
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_fstr(mypinfo->cinfo, COL_INFO,
|
|
":");
|
|
}
|
|
|
|
/*
|
|
* process requests
|
|
*/
|
|
|
|
for ( i = 0; i < num_reqs; i++ ) {
|
|
|
|
DBG1("looping through sequence of batch requests, loop #%d\n", i);
|
|
|
|
/* create display subtree for this message type */
|
|
|
|
if (icep_tree) {
|
|
|
|
ti = proto_tree_add_text(icep_tree, tvb, offset, -1,
|
|
"Batch Request Message Body: #%d", i);
|
|
|
|
icep_sub_tree = proto_item_add_subtree(ti, ett_icep_msg);
|
|
|
|
}
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) && (i != 0) ) {
|
|
col_append_fstr(mypinfo->cinfo, COL_INFO,
|
|
",");
|
|
}
|
|
|
|
dissect_icep_request_common(tvb, offset, icep_sub_tree, &consumed);
|
|
|
|
if ( consumed == -1 )
|
|
return;
|
|
|
|
if ( icep_tree && ti )
|
|
proto_item_set_len(ti, consumed);
|
|
|
|
offset += consumed;
|
|
DBG1("consumed --> %d\n", consumed);
|
|
}
|
|
}
|
|
|
|
static void dissect_icep_reply(tvbuff_t *tvb, guint32 offset, proto_tree *icep_tree)
|
|
{
|
|
/* p. 614, chapter 23.3.4:
|
|
*
|
|
* struct ReplyData {
|
|
* int requestId;
|
|
* byte replyStatus;
|
|
* [... messageSize - 19 bytes ... ]
|
|
* }
|
|
*/
|
|
|
|
gint32 messageSize = 0;
|
|
guint32 tvb_data_remained = 0;
|
|
guint32 reported_reply_data = 0;
|
|
proto_item *ti = NULL;
|
|
proto_tree *icep_sub_tree = NULL;
|
|
|
|
DBG0("dissect reply\n");
|
|
|
|
/* get at least a full reply message header */
|
|
|
|
if ( !tvb_bytes_exist(tvb, offset, ICEP_MIN_REPLY_SIZE) ) {
|
|
|
|
if (icep_tree)
|
|
proto_tree_add_text(icep_tree, tvb, offset, -1,
|
|
"too short header");
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_str(mypinfo->cinfo, COL_INFO,
|
|
" (too short header)");
|
|
}
|
|
|
|
return;
|
|
}
|
|
|
|
/* got 5 bytes, then data */
|
|
|
|
/* create display subtree for this message type */
|
|
|
|
if (icep_tree) {
|
|
|
|
ti = proto_tree_add_text(icep_tree, tvb, offset, -1,
|
|
"Reply Message Body");
|
|
|
|
icep_sub_tree = proto_item_add_subtree(ti, ett_icep_msg);
|
|
|
|
proto_tree_add_item(icep_sub_tree, hf_icep_request_id, tvb, offset, 4,
|
|
TRUE);
|
|
}
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_fstr(mypinfo->cinfo, COL_INFO, "(%d):",
|
|
tvb_get_letohl(tvb, offset));
|
|
}
|
|
|
|
offset += 4;
|
|
|
|
if (icep_tree)
|
|
proto_tree_add_item(icep_sub_tree, hf_icep_reply_status, tvb, offset, 1,
|
|
TRUE);
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_fstr(mypinfo->cinfo, COL_INFO, " %s",
|
|
val_to_str(tvb_get_guint8(tvb, offset),
|
|
icep_replystatus_vals,
|
|
"unknown reply status"));
|
|
}
|
|
|
|
offset++;
|
|
|
|
DBG1("consumed --> %d\n", 5);
|
|
|
|
/* check if I got all reply data */
|
|
tvb_data_remained = tvb_length_remaining(tvb, offset);
|
|
messageSize = tvb_get_letohl(tvb, 10);
|
|
reported_reply_data = messageSize - (ICEP_HEADER_SIZE + ICEP_MIN_REPLY_SIZE);
|
|
|
|
/* no */
|
|
if ( tvb_data_remained < reported_reply_data ) {
|
|
|
|
if (icep_sub_tree)
|
|
proto_tree_add_text(icep_sub_tree, tvb, offset, -1,
|
|
"Reply Data (missing %d bytes out of %d)",
|
|
reported_reply_data - tvb_data_remained,
|
|
reported_reply_data);
|
|
|
|
if ( check_col(mypinfo->cinfo, COL_INFO) ) {
|
|
col_append_fstr(mypinfo->cinfo, COL_INFO,
|
|
" (missing reply data, %d bytes)",
|
|
reported_reply_data - tvb_data_remained);
|
|
}
|
|
|
|
offset += tvb_data_remained;
|
|
DBG1("consumed --> %d\n", tvb_data_remained);
|
|
return;
|
|
}
|
|
|
|
/* yes (reported_reply_data can be 0) */
|
|
|
|
if (icep_sub_tree) {
|
|
|
|
if ( reported_reply_data !=0 )
|
|
proto_tree_add_text(icep_sub_tree, tvb, offset,
|
|
reported_reply_data,
|
|
"Reply data (%d bytes)",
|
|
reported_reply_data);
|
|
else
|
|
proto_tree_add_text(icep_sub_tree, tvb, offset,
|
|
reported_reply_data,
|
|
"Reply data (empty)");
|
|
}
|
|
|
|
offset += reported_reply_data;
|
|
DBG1("consumed --> %d\n", reported_reply_data);
|
|
}
|
|
|
|
static guint get_icep_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset)
|
|
{
|
|
return tvb_get_letohl(tvb, offset + 10);
|
|
}
|
|
|
|
static void dissect_icep_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
/* p. 611, chapter 23.3.1:
|
|
*
|
|
* struct HeaderData {
|
|
* int magic;
|
|
* byte protocolMajor;
|
|
* byte protocolMinor;
|
|
* byte encodingMajor;
|
|
* byte encodingMinor;
|
|
* byte messageType;
|
|
* byte compressionStatus;
|
|
* int messageSize;
|
|
* }
|
|
*/
|
|
|
|
proto_item *ti = NULL;
|
|
proto_tree *icep_tree = NULL;
|
|
guint32 offset = 0;
|
|
|
|
/* Make entries in Protocol column and Info column on summary display */
|
|
|
|
if ( check_col(pinfo->cinfo, COL_PROTOCOL) )
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICEP");
|
|
|
|
if ( check_col(pinfo->cinfo, COL_INFO) ) {
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "%s",
|
|
val_to_str(tvb_get_guint8(tvb, 8),
|
|
icep_msgtype_vals,
|
|
"Unknown Message Type: 0x%02x"));
|
|
}
|
|
|
|
mypinfo = pinfo;
|
|
|
|
if (tree) {
|
|
|
|
DBG0("got an icep msg, start analisys\n");
|
|
|
|
/* create display subtree for the protocol */
|
|
|
|
ti = proto_tree_add_item(tree, proto_icep, tvb, 0, -1, FALSE);
|
|
|
|
icep_tree = proto_item_add_subtree(ti, ett_icep);
|
|
|
|
/* add items to the subtree */
|
|
|
|
/* message header */
|
|
|
|
proto_tree_add_text(icep_tree, tvb, offset, 4,
|
|
"Magic Number: 'I','c','e','P'");
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_protocol_major,
|
|
tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_protocol_minor,
|
|
tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_encoding_major,
|
|
tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_encoding_minor,
|
|
tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_message_type,
|
|
tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_compression_status,
|
|
tvb, offset, 1, TRUE);
|
|
offset++;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_message_size,
|
|
tvb, offset, 4, TRUE);
|
|
offset += 4;
|
|
} else {
|
|
offset += ICEP_HEADER_SIZE;
|
|
}
|
|
|
|
switch(tvb_get_guint8(tvb, 8)) {
|
|
case 0x0:
|
|
DBG1("request message body: parsing %d bytes\n",
|
|
tvb_length_remaining(tvb, offset));
|
|
dissect_icep_request(tvb, offset, icep_tree);
|
|
break;
|
|
case 0x1:
|
|
DBG1("batch request message body: parsing %d bytes\n",
|
|
tvb_length_remaining(tvb, offset));
|
|
dissect_icep_batch_request(tvb, offset, icep_tree);
|
|
break;
|
|
case 0x2:
|
|
DBG1("reply message body: parsing %d bytes\n",
|
|
tvb_length_remaining(tvb, offset));
|
|
dissect_icep_reply(tvb, offset, icep_tree);
|
|
break;
|
|
case 0x3:
|
|
case 0x4:
|
|
/* messages already dissected */
|
|
break;
|
|
default:
|
|
if (tree)
|
|
proto_tree_add_text(tree, tvb, 8, 1, /* display msg type byte */
|
|
"Unknown Message Type: 0x%02x",
|
|
tvb_get_guint8(tvb, 8));
|
|
break;
|
|
}
|
|
}
|
|
|
|
/* entry point */
|
|
static gboolean dissect_icep(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
|
|
{
|
|
DBG0("triggered\n");
|
|
|
|
/* get at least a full message header (taken from packet-yhoo.c) */
|
|
|
|
/* check for magic string (taken from packet-giop.c) */
|
|
|
|
if ( tvb_memeql(tvb, 0, icep_magic, 4) == -1 ) {
|
|
/* Not a ICEP packet. */
|
|
return FALSE;
|
|
}
|
|
|
|
/* start dissecting */
|
|
|
|
tcp_dissect_pdus(tvb, pinfo, tree, TRUE, ICEP_HEADER_SIZE,
|
|
get_icep_pdu_len, dissect_icep_pdu);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
|
|
/* Register the protocol with Wireshark */
|
|
|
|
void proto_register_icep(void)
|
|
{
|
|
|
|
/* Setup list of header fields */
|
|
|
|
static hf_register_info hf[] = {
|
|
|
|
{ &hf_icep_protocol_major,
|
|
{
|
|
"Protocol Major", "icep.protocol_major",
|
|
FT_INT8, BASE_DEC, NULL, 0x0,
|
|
"The protocol major version number", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_protocol_minor,
|
|
{
|
|
"Protocol Minor", "icep.protocol_minor",
|
|
FT_INT8, BASE_DEC, NULL, 0x0,
|
|
"The protocol minor version number", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_encoding_major,
|
|
{
|
|
"Encoding Major", "icep.encoding_major",
|
|
FT_INT8, BASE_DEC, NULL, 0x0,
|
|
"The encoding major version number", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_encoding_minor,
|
|
{
|
|
"Encoding Minor", "icep.encoding_minor",
|
|
FT_INT8, BASE_DEC, NULL, 0x0,
|
|
"The encoding minor version number", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_message_type,
|
|
{
|
|
"Message Type", "icep.message_type",
|
|
FT_INT8, BASE_DEC, VALS(icep_msgtype_vals), 0x0,
|
|
"The message type", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_compression_status,
|
|
{
|
|
"Compression Status", "icep.compression_status",
|
|
FT_INT8, BASE_DEC, VALS(icep_zipstatus_vals), 0x0,
|
|
"The compression status of the message", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_message_size,
|
|
{
|
|
"Message Size", "icep.message_status",
|
|
FT_INT32, BASE_DEC, NULL, 0x0,
|
|
"The size of the message in bytes, including the header",
|
|
HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_request_id,
|
|
{
|
|
"Request Identifier", "icep.request_id",
|
|
FT_INT32, BASE_DEC, NULL, 0x0,
|
|
"The request identifier",
|
|
HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_reply_status,
|
|
{
|
|
"Reply Status", "icep.protocol_major",
|
|
FT_INT8, BASE_DEC, VALS(icep_replystatus_vals), 0x0,
|
|
"The reply status", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_id_name,
|
|
{
|
|
"Object Identity Name", "icep.id.name",
|
|
FT_STRINGZ, BASE_NONE, NULL, 0x0,
|
|
"The object identity name", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_id_category,
|
|
{
|
|
"Object Identity Content", "icep.id.content",
|
|
FT_STRINGZ, BASE_NONE, NULL, 0x0,
|
|
"The object identity content", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_facet,
|
|
{
|
|
"Facet Name", "icep.facet",
|
|
FT_STRINGZ, BASE_NONE, NULL, 0x0,
|
|
"The facet name", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_operation,
|
|
{
|
|
"Operation Name", "icep.operation",
|
|
FT_STRINGZ, BASE_NONE, NULL, 0x0,
|
|
"The operation name", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_mode,
|
|
{
|
|
"Ice::OperationMode", "icep.operation_mode",
|
|
FT_INT8, BASE_DEC, VALS(icep_mode_vals), 0x0,
|
|
"A byte representing Ice::OperationMode", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_context,
|
|
{
|
|
"Invocation Context", "icep.context",
|
|
FT_STRINGZ, BASE_NONE, NULL, 0x0,
|
|
"The invocation context", HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_params_size,
|
|
{
|
|
"Input Parameters Size", "icep.params.size",
|
|
FT_INT32, BASE_DEC, NULL, 0x0,
|
|
"The encapsulated input parameters size",
|
|
HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_params_major,
|
|
{
|
|
"Input Parameters Encoding Major",
|
|
"icep.params.major",
|
|
FT_INT8, BASE_DEC, NULL, 0x0,
|
|
"The major encoding version of encapsulated parameters",
|
|
HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_params_minor,
|
|
{
|
|
"Input Parameters Encoding Minor",
|
|
"icep.params.minor",
|
|
FT_INT8, BASE_DEC, NULL, 0x0,
|
|
"The minor encoding version of encapsulated parameters",
|
|
HFILL
|
|
}
|
|
},
|
|
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
|
|
static gint *ett[] = {
|
|
&ett_icep,
|
|
&ett_icep_msg,
|
|
};
|
|
|
|
/* Register the protocol name and description */
|
|
|
|
proto_icep =
|
|
proto_register_protocol("Internet Communications Engine Protocol",
|
|
"ICEP", "icep");
|
|
|
|
/* Required function calls to register the header fields and subtrees used */
|
|
|
|
proto_register_field_array(proto_icep, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
|
|
void proto_reg_handoff_icep(void)
|
|
{
|
|
/* Register as a heuristic TCP/UDP dissector */
|
|
|
|
heur_dissector_add("tcp", dissect_icep, proto_icep);
|
|
heur_dissector_add("udp", dissect_icep, proto_icep);
|
|
}
|