1342 lines
40 KiB
C
1342 lines
40 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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* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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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*/
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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) Information about Ice can be found here: http://www.zeroc.com
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/expert.h>
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#include <epan/prefs.h>
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#include "packet-tcp.h"
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void proto_register_icep(void);
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void proto_reg_handoff_icep(void);
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#if 0
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#define DBG(...) 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, __VA_ARGS__); \
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} while (0)
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#else
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#define DBG(...)
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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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/* 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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static int hf_icep_magic_number = -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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static int hf_icep_params_encapsulated = -1;
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static int hf_icep_reply_data = -1;
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static int hf_icep_invocation_key = -1;
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static int hf_icep_invocation_value = -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 gint ett_icep_invocation_context = -1;
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static expert_field ei_icep_params_size = EI_INIT;
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static expert_field ei_icep_context_missing = EI_INIT;
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static expert_field ei_icep_reply_data = EI_INIT;
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static expert_field ei_icep_length = EI_INIT;
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static expert_field ei_icep_facet_max_one_element = EI_INIT;
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static expert_field ei_icep_string_too_long = EI_INIT;
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static expert_field ei_icep_string_malformed = EI_INIT;
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static expert_field ei_icep_message_type = EI_INIT;
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static expert_field ei_icep_mode_missing = EI_INIT;
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static expert_field ei_icep_params_encapsulated = EI_INIT;
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static expert_field ei_icep_params_missing = EI_INIT;
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static expert_field ei_icep_batch_requests = EI_INIT;
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static expert_field ei_icep_empty_batch = EI_INIT;
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static expert_field ei_icep_facet_missing = EI_INIT;
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static expert_field ei_icep_context_too_long = EI_INIT;
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/* Preferences */
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static guint icep_max_batch_requests = 64;
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static guint icep_max_ice_string_len = 512;
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static guint icep_max_ice_context_pairs = 64;
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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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/*
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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(packet_info *pinfo, proto_tree *tree, proto_item *item, int hf_icep,
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tvbuff_t *tvb, guint32 offset, gint32 *consumed, const guint8 **dest)
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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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const guint8 *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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expert_add_info_format(pinfo, item, &ei_icep_string_malformed, "1st byte of Size missing");
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col_append_str(pinfo->cinfo, COL_INFO, " (1st byte of Size missing)");
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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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expert_add_info_format(pinfo, item, &ei_icep_string_malformed, "second field of Size missing");
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col_append_str(pinfo->cinfo, COL_INFO, " (second field of Size missing)");
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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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DBG("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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expert_add_info_format(pinfo, item, &ei_icep_string_malformed, "missing or truncated string");
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col_append_str(pinfo->cinfo, COL_INFO, " (missing or truncated string)");
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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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expert_add_info(pinfo, item, &ei_icep_string_too_long);
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col_append_str(pinfo->cinfo, COL_INFO, " (string too long)");
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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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proto_tree_add_item_ret_string(tree, hf_icep, tvb, offset, Size, ENC_ASCII, wmem_packet_scope(), &s);
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} else {
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s = wmem_strdup(wmem_packet_scope(), "(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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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(packet_info *pinfo, proto_tree *tree, proto_item *item, 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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(*consumed) = 0;
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/* check first byte */
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if ( !tvb_bytes_exist(tvb, offset, 1) ) {
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expert_add_info(pinfo, item, &ei_icep_facet_missing);
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col_append_str(pinfo->cinfo, COL_INFO, " (facet field missing)");
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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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/* 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, "(empty)");
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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(pinfo, tree, item, hf_icep, tvb, offset, &consumed_facet, NULL);
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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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/* display the XX Size byte when click here */
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expert_add_info(pinfo, item, &ei_icep_facet_max_one_element);
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col_append_str(pinfo->cinfo, COL_INFO, " (facet can be max one element)");
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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(packet_info *pinfo, proto_tree *tree, proto_item *item,
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tvbuff_t *tvb, guint32 offset, 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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const 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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expert_add_info_format(pinfo, item, &ei_icep_context_missing, "context missing");
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col_append_str(pinfo->cinfo, COL_INFO, " (context missing)");
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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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expert_add_info_format(pinfo, item, &ei_icep_context_missing, "second field of Size missing");
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col_append_str(pinfo->cinfo, COL_INFO, " (second field of Size missing)");
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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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DBG("context.Size --> %d\n", Size);
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if ( Size > icep_max_ice_context_pairs ) {
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/* display the XX Size byte when click here */
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expert_add_info(pinfo, item, &ei_icep_context_too_long);
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col_append_str(pinfo->cinfo, COL_INFO, " (too long context)");
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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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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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/* 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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const guint8 *str_key = NULL;
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/* value */
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gint32 consumed_value = 0;
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const guint8 *str_value = NULL;
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proto_item *ti;
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proto_tree *context_tree;
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DBG("looping through context dictionary, loop #%d\n", i);
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context_tree = proto_tree_add_subtree(tree, tvb, offset, -1, ett_icep_invocation_context, &ti, "Invocation Context");
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dissect_ice_string(pinfo, context_tree, ti, hf_icep_invocation_key, tvb, offset, &consumed_key, &str_key);
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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(pinfo, context_tree, ti, hf_icep_invocation_value, tvb, offset, &consumed_value, &str_value);
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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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offset += consumed_value;
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(*consumed) += consumed_value;
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if (ti)
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proto_item_set_len(ti, (consumed_key + consumed_value) + 1);
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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.
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*/
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static void dissect_ice_params(packet_info *pinfo, proto_tree *tree, proto_item *item, tvbuff_t *tvb,
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guint32 offset, gint32 *consumed)
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{
|
|
/* p. 612, chapter 23.3.2 and p. 587, 23.2.2:
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* "params" is an Encapsulation
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*
|
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* struct Encapsulation {
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* int size;
|
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* byte major;
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* byte minor;
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* //(size - 6) bytes of data
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* }
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*
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*/
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|
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gint32 size = 0;
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gint tvb_data_remained = 0;
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(*consumed) = 0;
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/* check first 6 bytes */
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if ( !tvb_bytes_exist(tvb, offset, ICEP_MIN_PARAMS_SIZE) ) {
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expert_add_info(pinfo, item, &ei_icep_params_missing);
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col_append_str(pinfo->cinfo, COL_INFO, " (params missing)");
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(*consumed) = -1;
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return;
|
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}
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|
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/* get the size */
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size = tvb_get_letohl(tvb, offset);
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|
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DBG("params.size --> %d\n", size);
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|
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if ( size < ICEP_MIN_PARAMS_SIZE ) {
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expert_add_info(pinfo, item, &ei_icep_params_size);
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col_append_str(pinfo->cinfo, COL_INFO, " (params size too small)");
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(*consumed) = -1;
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return;
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}
|
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if ( tree ) {
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|
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proto_tree_add_item(tree, hf_icep_params_size, tvb, offset, 4, ENC_LITTLE_ENDIAN);
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offset += 4;
|
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(*consumed) += 4;
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|
|
proto_tree_add_item(tree, hf_icep_params_major, tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
|
offset += 1;
|
|
(*consumed)++;
|
|
|
|
proto_tree_add_item(tree, hf_icep_params_minor, tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
|
offset += 1;
|
|
(*consumed)++;
|
|
|
|
} else {
|
|
/* skip 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 ) ) {
|
|
|
|
expert_add_info_format(pinfo, item, &ei_icep_params_encapsulated, "missing encapsulated data (%d bytes)", size - ICEP_MIN_PARAMS_SIZE - tvb_data_remained);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" (missing encapsulated data (%d bytes))",
|
|
size - ICEP_MIN_PARAMS_SIZE - tvb_data_remained);
|
|
|
|
(*consumed) = -1;
|
|
return;
|
|
}
|
|
|
|
/* encapsulated params */
|
|
proto_tree_add_item(tree, hf_icep_params_encapsulated, tvb, offset, (size - ICEP_MIN_PARAMS_SIZE), ENC_NA);
|
|
|
|
(*consumed) += (size - ICEP_MIN_PARAMS_SIZE);
|
|
}
|
|
|
|
static void dissect_icep_request_common(tvbuff_t *tvb, guint32 offset,
|
|
packet_info *pinfo, proto_tree *icep_sub_tree, proto_item* icep_sub_item, 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;
|
|
const guint8 *namestr = NULL;
|
|
const guint8 *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) ) {
|
|
|
|
expert_add_info_format(pinfo, icep_sub_item, &ei_icep_length, "too short header");
|
|
col_append_str(pinfo->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(pinfo, icep_sub_tree, icep_sub_item, hf_icep_id_name, tvb, offset, &consumed, &namestr);
|
|
|
|
if ( consumed == -1 )
|
|
goto error;
|
|
|
|
offset += consumed; DBG("consumed --> %d\n", consumed);
|
|
(*total_consumed) += consumed;
|
|
|
|
|
|
dissect_ice_string(pinfo, icep_sub_tree, icep_sub_item, hf_icep_id_category, tvb, offset, &consumed, NULL);
|
|
|
|
if ( consumed == -1 )
|
|
goto error;
|
|
|
|
offset += consumed; DBG("consumed --> %d\n", consumed);
|
|
(*total_consumed) += consumed;
|
|
|
|
|
|
/* "facet" is a:
|
|
* sequence<string> StringSeq
|
|
*
|
|
*/
|
|
|
|
dissect_ice_facet(pinfo, icep_sub_tree, icep_sub_item, hf_icep_facet, tvb, offset, &consumed);
|
|
|
|
if ( consumed == -1 )
|
|
goto error;
|
|
|
|
offset += consumed; DBG("consumed --> %d\n", consumed);
|
|
(*total_consumed) += consumed;
|
|
|
|
/* "operation" is an ice_string
|
|
*
|
|
*/
|
|
|
|
dissect_ice_string(pinfo, icep_sub_tree, icep_sub_item, hf_icep_operation, tvb, offset, &consumed, &opstr);
|
|
|
|
if ( consumed == -1 )
|
|
goto error;
|
|
else {
|
|
offset += consumed; DBG("consumed --> %d\n", consumed);
|
|
(*total_consumed) += consumed;
|
|
|
|
if ( opstr && namestr ) {
|
|
DBG("operation --> %s.%s()\n", namestr, opstr);
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " %s.%s()",
|
|
namestr, opstr);
|
|
opstr = NULL;
|
|
namestr = NULL;
|
|
}
|
|
}
|
|
|
|
/* check and get mode byte */
|
|
if ( !tvb_bytes_exist(tvb, offset, 1) ) {
|
|
|
|
expert_add_info(pinfo, icep_sub_item, &ei_icep_mode_missing);
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, " (mode field missing)");
|
|
goto error;
|
|
}
|
|
|
|
proto_tree_add_item(icep_sub_tree, hf_icep_mode, tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
|
|
|
offset++; DBG("consumed --> 1\n");
|
|
(*total_consumed)++;
|
|
|
|
|
|
/* "context" is a dictionary<string, string>
|
|
*
|
|
*/
|
|
|
|
dissect_ice_context(pinfo, icep_sub_tree, icep_sub_item, tvb, offset, &consumed);
|
|
|
|
if ( consumed == -1 )
|
|
goto error;
|
|
|
|
offset += consumed; DBG("consumed --> %d\n", consumed);
|
|
(*total_consumed) += consumed;
|
|
|
|
/* "params" is a Encapsulation
|
|
*
|
|
*/
|
|
|
|
dissect_ice_params(pinfo, icep_sub_tree, icep_sub_item, tvb, offset, &consumed);
|
|
|
|
if ( consumed == -1 )
|
|
goto error;
|
|
|
|
/*offset += consumed;*/
|
|
DBG("consumed --> %d\n", consumed);
|
|
(*total_consumed) += consumed;
|
|
|
|
return;
|
|
|
|
error:
|
|
(*total_consumed) = -1;
|
|
}
|
|
|
|
|
|
static void dissect_icep_request(tvbuff_t *tvb, guint32 offset,
|
|
packet_info *pinfo, proto_tree *icep_tree, proto_item* icep_item)
|
|
{
|
|
/* 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;
|
|
|
|
DBG("dissect request\n");
|
|
|
|
/* check for req id */
|
|
if ( !tvb_bytes_exist(tvb, offset, 4) ) {
|
|
|
|
expert_add_info_format(pinfo, icep_item, &ei_icep_length, "too short header");
|
|
col_append_str(pinfo->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);
|
|
|
|
icep_sub_tree = proto_tree_add_subtree(icep_tree, tvb, offset, -1, ett_icep_msg, &ti, "Request Message Body");
|
|
|
|
proto_tree_add_item(icep_sub_tree, hf_icep_request_id, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
if ( reqid != 0 ) {
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "(%d):", tvb_get_letohl(tvb, offset));
|
|
} else
|
|
col_append_str(pinfo->cinfo, COL_INFO, "(oneway):");
|
|
|
|
|
|
offset += 4;
|
|
DBG("consumed --> 4\n");
|
|
|
|
dissect_icep_request_common(tvb, offset, pinfo, icep_sub_tree, ti, &consumed);
|
|
|
|
if ( consumed == -1 )
|
|
return;
|
|
|
|
/*offset += consumed;*/
|
|
DBG("consumed --> %d\n", consumed);
|
|
}
|
|
|
|
|
|
|
|
static void dissect_icep_batch_request(tvbuff_t *tvb, guint32 offset,
|
|
packet_info *pinfo, proto_tree *icep_tree, proto_item* icep_item)
|
|
{
|
|
/* 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;
|
|
|
|
DBG("dissect batch request\n");
|
|
|
|
/* check for first 4 byte */
|
|
if ( !tvb_bytes_exist(tvb, offset, 4) ) {
|
|
|
|
expert_add_info_format(pinfo, icep_item, &ei_icep_length, "counter of batch requests missing");
|
|
col_append_str(pinfo->cinfo, COL_INFO, " (counter of batch requests missing)");
|
|
return;
|
|
}
|
|
|
|
num_reqs = tvb_get_letohl(tvb, offset);
|
|
offset += 4;
|
|
|
|
DBG("batch_requests.count --> %d\n", num_reqs);
|
|
|
|
if ( num_reqs > icep_max_batch_requests ) {
|
|
|
|
expert_add_info_format(pinfo, icep_item, &ei_icep_batch_requests, "too many batch requests (%d)", num_reqs);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " (too many batch requests, %d)", num_reqs);
|
|
return;
|
|
}
|
|
|
|
if ( num_reqs == 0 ) {
|
|
|
|
proto_tree_add_expert(icep_tree, pinfo, &ei_icep_empty_batch, tvb, offset, -1);
|
|
col_append_str(pinfo->cinfo, COL_INFO, " (empty batch requests sequence)");
|
|
|
|
return;
|
|
}
|
|
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, ":");
|
|
|
|
/*
|
|
* process requests
|
|
*/
|
|
|
|
for ( i = 0; i < num_reqs; i++ ) {
|
|
|
|
DBG("looping through sequence of batch requests, loop #%d\n", i);
|
|
|
|
/* create display subtree for this message type */
|
|
|
|
icep_sub_tree = proto_tree_add_subtree_format(icep_tree, tvb, offset, -1,
|
|
ett_icep_msg, &ti, "Batch Request Message Body: #%d", i);
|
|
|
|
if (i != 0) {
|
|
col_append_str(pinfo->cinfo, COL_INFO, ",");
|
|
}
|
|
|
|
dissect_icep_request_common(tvb, offset, pinfo, icep_sub_tree, ti, &consumed);
|
|
|
|
if ( consumed == -1 )
|
|
return;
|
|
|
|
if ( icep_tree && ti )
|
|
proto_item_set_len(ti, consumed);
|
|
|
|
offset += consumed;
|
|
DBG("consumed --> %d\n", consumed);
|
|
}
|
|
}
|
|
|
|
static void dissect_icep_reply(tvbuff_t *tvb, guint32 offset,
|
|
packet_info *pinfo, proto_tree *icep_tree, proto_item* icep_item)
|
|
{
|
|
/* 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;
|
|
|
|
DBG("dissect reply\n");
|
|
|
|
/* get at least a full reply message header */
|
|
|
|
if ( !tvb_bytes_exist(tvb, offset, ICEP_MIN_REPLY_SIZE) ) {
|
|
|
|
expert_add_info_format(pinfo, icep_item, &ei_icep_length, "too short header");
|
|
|
|
col_append_str(pinfo->cinfo, COL_INFO, " (too short header)");
|
|
return;
|
|
}
|
|
|
|
/* got 5 bytes, then data */
|
|
|
|
/* create display subtree for this message type */
|
|
|
|
icep_sub_tree = proto_tree_add_subtree(icep_tree, tvb, offset, -1,
|
|
ett_icep_msg, &ti, "Reply Message Body");
|
|
|
|
proto_tree_add_item(icep_sub_tree, hf_icep_request_id, tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, "(%d):", tvb_get_letohl(tvb, offset));
|
|
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(icep_sub_tree, hf_icep_reply_status, tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO, " %s",
|
|
val_to_str_const(tvb_get_guint8(tvb, offset),
|
|
icep_replystatus_vals,
|
|
"unknown reply status"));
|
|
|
|
offset++;
|
|
|
|
DBG("consumed --> %d\n", 5);
|
|
|
|
/* check if I got all reply data */
|
|
tvb_data_remained = tvb_reported_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 ) {
|
|
|
|
expert_add_info_format(pinfo, ti, &ei_icep_reply_data, "Reply Data (missing %d bytes out of %d)", reported_reply_data - tvb_data_remained, reported_reply_data);
|
|
|
|
col_append_fstr(pinfo->cinfo, COL_INFO,
|
|
" (missing reply data, %d bytes)",
|
|
reported_reply_data - tvb_data_remained);
|
|
|
|
/*offset += tvb_data_remained;*/
|
|
DBG("consumed --> %d\n", tvb_data_remained);
|
|
return;
|
|
}
|
|
|
|
/* yes (reported_reply_data can be 0) */
|
|
|
|
proto_tree_add_item(icep_sub_tree, hf_icep_reply_data, tvb, offset, reported_reply_data, ENC_NA);
|
|
|
|
/*offset += reported_reply_data;*/
|
|
DBG("consumed --> %d\n", reported_reply_data);
|
|
}
|
|
|
|
static guint get_icep_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb,
|
|
int offset, void *data _U_)
|
|
{
|
|
return tvb_get_letohl(tvb, offset + 10);
|
|
}
|
|
|
|
static int dissect_icep_pdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
|
|
{
|
|
/* 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, *msg_item = NULL;
|
|
proto_tree *icep_tree;
|
|
guint32 offset = 0;
|
|
|
|
/* Make entries in Protocol column and Info column on summary display */
|
|
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "ICEP");
|
|
|
|
col_add_str(pinfo->cinfo, COL_INFO,
|
|
val_to_str(tvb_get_guint8(tvb, 8),
|
|
icep_msgtype_vals,
|
|
"Unknown Message Type: 0x%02x"));
|
|
|
|
DBG("got an icep msg, start analysis\n");
|
|
|
|
/* create display subtree for the protocol */
|
|
|
|
ti = proto_tree_add_item(tree, proto_icep, tvb, 0, -1, ENC_NA);
|
|
icep_tree = proto_item_add_subtree(ti, ett_icep);
|
|
|
|
if (icep_tree) {
|
|
/* add items to the subtree */
|
|
|
|
/* message header */
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_magic_number, tvb, offset, 4, ENC_ASCII|ENC_NA);
|
|
offset += 4;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_protocol_major,
|
|
tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
|
offset++;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_protocol_minor,
|
|
tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
|
offset++;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_encoding_major,
|
|
tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
|
offset++;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_encoding_minor,
|
|
tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
|
offset++;
|
|
|
|
msg_item = proto_tree_add_item(icep_tree, hf_icep_message_type,
|
|
tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
|
offset++;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_compression_status,
|
|
tvb, offset, 1, ENC_LITTLE_ENDIAN);
|
|
offset++;
|
|
|
|
proto_tree_add_item(icep_tree, hf_icep_message_size,
|
|
tvb, offset, 4, ENC_LITTLE_ENDIAN);
|
|
offset += 4;
|
|
} else {
|
|
offset += ICEP_HEADER_SIZE;
|
|
}
|
|
|
|
switch(tvb_get_guint8(tvb, 8)) {
|
|
case 0x0:
|
|
DBG("request message body: parsing %d bytes\n",
|
|
tvb_captured_length_remaining(tvb, offset));
|
|
dissect_icep_request(tvb, offset, pinfo, icep_tree, ti);
|
|
break;
|
|
case 0x1:
|
|
DBG("batch request message body: parsing %d bytes\n",
|
|
tvb_captured_length_remaining(tvb, offset));
|
|
dissect_icep_batch_request(tvb, offset, pinfo, icep_tree, ti);
|
|
break;
|
|
case 0x2:
|
|
DBG("reply message body: parsing %d bytes\n",
|
|
tvb_captured_length_remaining(tvb, offset));
|
|
dissect_icep_reply(tvb, offset, pinfo, icep_tree, ti);
|
|
break;
|
|
case 0x3:
|
|
case 0x4:
|
|
/* messages already dissected */
|
|
break;
|
|
default:
|
|
expert_add_info_format(pinfo, msg_item, &ei_icep_message_type, "Unknown Message Type: 0x%02x", tvb_get_guint8(tvb, 8));
|
|
break;
|
|
}
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
/* entry point */
|
|
static gboolean dissect_icep_tcp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
|
|
{
|
|
DBG("triggered\n");
|
|
|
|
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, data);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean dissect_icep_udp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data)
|
|
{
|
|
DBG("triggered\n");
|
|
|
|
if ( tvb_memeql(tvb, 0, icep_magic, 4) == -1 ) {
|
|
/* Not a ICEP packet. */
|
|
return FALSE;
|
|
}
|
|
|
|
/* start dissecting */
|
|
dissect_icep_pdu(tvb, pinfo, tree, data);
|
|
return TRUE;
|
|
}
|
|
|
|
/* Register the protocol with Wireshark */
|
|
|
|
void proto_register_icep(void)
|
|
{
|
|
module_t *icep_module;
|
|
expert_module_t* expert_icep;
|
|
|
|
/* 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_magic_number,
|
|
{
|
|
"Magic Number", "icep.magic_number",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, 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
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_params_encapsulated,
|
|
{
|
|
"Encapsulated parameters",
|
|
"icep.params.encapsulated",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0,
|
|
"Remaining encapsulated parameters",
|
|
HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_reply_data,
|
|
{
|
|
"Reported reply data",
|
|
"icep.params.reply_data",
|
|
FT_BYTES, BASE_NONE, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_invocation_key,
|
|
{
|
|
"Key",
|
|
"icep.invocation_key",
|
|
FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
|
|
{ &hf_icep_invocation_value,
|
|
{
|
|
"Value",
|
|
"icep.invocation_value",
|
|
FT_STRING, BASE_NONE, NULL, 0x0, NULL, HFILL
|
|
}
|
|
},
|
|
};
|
|
|
|
/* Setup protocol subtree array */
|
|
|
|
static gint *ett[] = {
|
|
&ett_icep,
|
|
&ett_icep_msg,
|
|
&ett_icep_invocation_context,
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_icep_string_malformed, { "icep.string.malformed", PI_MALFORMED, PI_ERROR, "String malformed", EXPFILL }},
|
|
{ &ei_icep_string_too_long, { "icep.string.too_long", PI_PROTOCOL, PI_WARN, "string too long", EXPFILL }},
|
|
{ &ei_icep_facet_missing, { "icep.facet.missing", PI_MALFORMED, PI_ERROR, "facet field missing", EXPFILL }},
|
|
{ &ei_icep_facet_max_one_element, { "icep.facet.max_one_element", PI_PROTOCOL, PI_WARN, "facet can be max one element", EXPFILL }},
|
|
{ &ei_icep_context_missing, { "icep.context.missing", PI_MALFORMED, PI_ERROR, "context missing", EXPFILL }},
|
|
{ &ei_icep_context_too_long, { "icep.context.too_long", PI_PROTOCOL, PI_WARN, "too long context", EXPFILL }},
|
|
{ &ei_icep_params_missing, { "icep.params.missing", PI_MALFORMED, PI_ERROR, "params missing", EXPFILL }},
|
|
{ &ei_icep_params_size, { "icep.params.size.invalid", PI_PROTOCOL, PI_WARN, "params size too small", EXPFILL }},
|
|
{ &ei_icep_params_encapsulated, { "icep.params.encapsulated.missing", PI_PROTOCOL, PI_WARN, "missing encapsulated data (%d bytes)", EXPFILL }},
|
|
{ &ei_icep_length, { "icep.length_invalid", PI_MALFORMED, PI_ERROR, "Invalid length", EXPFILL }},
|
|
{ &ei_icep_mode_missing, { "icep.mode.missing", PI_MALFORMED, PI_ERROR, "mode field missing", EXPFILL }},
|
|
{ &ei_icep_batch_requests, { "icep.batch_requests.invalid", PI_PROTOCOL, PI_WARN, "too many batch requests", EXPFILL }},
|
|
{ &ei_icep_empty_batch, { "icep.batch_requests.empty", PI_PROTOCOL, PI_WARN, "empty batch requests sequence", EXPFILL }},
|
|
{ &ei_icep_reply_data, { "icep.params.reply_data.missing", PI_MALFORMED, PI_ERROR, "Reply Data missing", EXPFILL }},
|
|
{ &ei_icep_message_type, { "icep.message_type.unknown", PI_PROTOCOL, PI_WARN, "Unknown Message Type", EXPFILL }},
|
|
};
|
|
|
|
/* 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));
|
|
expert_icep = expert_register_protocol(proto_icep);
|
|
expert_register_field_array(expert_icep, ei, array_length(ei));
|
|
|
|
icep_module = prefs_register_protocol(proto_icep, NULL);
|
|
prefs_register_uint_preference(icep_module, "max_batch_requests",
|
|
"Maximum batch requests",
|
|
"Maximum number of batch requests allowed",
|
|
10, &icep_max_batch_requests);
|
|
|
|
prefs_register_uint_preference(icep_module, "max_ice_string_len",
|
|
"Maximum string length",
|
|
"Maximum length allowed of an ICEP string",
|
|
10, &icep_max_ice_string_len);
|
|
|
|
prefs_register_uint_preference(icep_module, "max_ice_context_pairs",
|
|
"Maximum context pairs",
|
|
"Maximum number of context pairs allowed",
|
|
10, &icep_max_ice_context_pairs);
|
|
}
|
|
|
|
|
|
void proto_reg_handoff_icep(void)
|
|
{
|
|
dissector_handle_t icep_tcp_handle, icep_udp_handle;
|
|
|
|
/* Register as a heuristic TCP/UDP dissector */
|
|
icep_tcp_handle = create_dissector_handle(dissect_icep_tcp, proto_icep);
|
|
icep_udp_handle = create_dissector_handle(dissect_icep_udp, proto_icep);
|
|
|
|
heur_dissector_add("tcp", dissect_icep_tcp, "ICEP over TCP", "icep_tcp", proto_icep, HEURISTIC_ENABLE);
|
|
heur_dissector_add("udp", dissect_icep_udp, "ICEP over UDP", "icep_udp", proto_icep, HEURISTIC_ENABLE);
|
|
|
|
/* Register TCP port for dissection */
|
|
dissector_add_for_decode_as_with_preference("tcp.port", icep_tcp_handle);
|
|
/* Register UDP port for dissection */
|
|
dissector_add_for_decode_as_with_preference("udp.port", icep_udp_handle);
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 4
|
|
* tab-width: 8
|
|
* indent-tabs-mode: nil
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=4 tabstop=8 expandtab:
|
|
* :indentSize=4:tabSize=8:noTabs=true:
|
|
*/
|