forked from osmocom/wireshark
![Dario Lombardo](/assets/img/avatar_default.png)
Change-Id: I92c94448e6641716d03158a5f332c8b53709423a Reviewed-on: https://code.wireshark.org/review/25756 Petri-Dish: Dario Lombardo <lomato@gmail.com> Reviewed-by: Anders Broman <a.broman58@gmail.com>
336 lines
9.5 KiB
C
336 lines
9.5 KiB
C
/* packet-ziop.c
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* Routines for CORBA ZIOP packet disassembly
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* Significantly based on packet-giop.c
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* Copyright 2009 Alvaro Vega Garcia <avega at tid dot es>
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*
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* According with GIOP Compression RFP revised submission
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* OMG mars/2008-12-20
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* http://www.omg.org/docs/ptc/09-01-03.pdf
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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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* SPDX-License-Identifier: GPL-2.0-or-later
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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 "packet-ziop.h"
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#include "packet-giop.h"
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#include "packet-tcp.h"
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/*
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* Set to 1 for DEBUG output - TODO make this a runtime option
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*/
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#define DEBUG 0
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void proto_reg_handoff_ziop(void);
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void proto_register_ziop(void);
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/*
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* ------------------------------------------------------------------------------------------+
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* Data/Variables/Structs
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* ------------------------------------------------------------------------------------------+
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*/
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static int proto_ziop = -1;
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/*
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* (sub)Tree declares
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*/
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static gint hf_ziop_magic = -1;
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static gint hf_ziop_giop_version_major = -1;
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static gint hf_ziop_giop_version_minor = -1;
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static gint hf_ziop_flags = -1;
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static gint hf_ziop_message_type = -1;
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static gint hf_ziop_message_size = -1;
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static gint hf_ziop_compressor_id = -1;
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static gint hf_ziop_original_length = -1;
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static gint ett_ziop = -1;
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static expert_field ei_ziop_version = EI_INIT;
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static dissector_handle_t ziop_tcp_handle;
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static const value_string ziop_compressor_ids[] = {
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{ 0, "None" },
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{ 1, "GZIP"},
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{ 2, "PKZIP"},
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{ 3, "BZIP2"},
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{ 4, "ZLIB"},
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{ 5, "LZMA"},
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{ 6, "LZOP"},
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{ 7, "RZIP"},
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{ 8, "7X"},
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{ 9, "XAR"},
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{ 0, NULL}
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};
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static const value_string giop_message_types[] = {
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{ 0x0, "Request" },
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{ 0x1, "Reply"},
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{ 0x2, "CancelRequest"},
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{ 0x3, "LocateRequest"},
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{ 0x4, "LocateReply"},
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{ 0x5, "CloseConnection"},
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{ 0x6, "MessageError"},
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{ 0x7, "Fragment"},
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{ 0, NULL}
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};
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static gboolean ziop_desegment = TRUE;
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/* Main entry point */
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static int
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dissect_ziop (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void* data _U_) {
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guint offset = 0;
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guint8 giop_version_major, giop_version_minor, message_type;
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proto_tree *ziop_tree = NULL;
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proto_item *ti;
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guint8 flags;
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guint byte_order;
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const char *label = "none";
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if (tvb_reported_length(tvb) < 7)
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return 0;
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col_set_str (pinfo->cinfo, COL_PROTOCOL, ZIOP_MAGIC);
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/* Clear out stuff in the info column */
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col_clear(pinfo->cinfo, COL_INFO);
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ti = proto_tree_add_item (tree, proto_ziop, tvb, 0, -1, ENC_NA);
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ziop_tree = proto_item_add_subtree (ti, ett_ziop);
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proto_tree_add_item(ziop_tree, hf_ziop_magic, tvb, offset, 4, ENC_ASCII|ENC_NA);
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offset += 4;
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proto_tree_add_item(ziop_tree, hf_ziop_giop_version_major, tvb, offset, 1, ENC_BIG_ENDIAN);
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giop_version_major = tvb_get_guint8(tvb, offset);
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offset++;
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proto_tree_add_item(ziop_tree, hf_ziop_giop_version_minor, tvb, offset, 1, ENC_BIG_ENDIAN);
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giop_version_minor = tvb_get_guint8(tvb, offset);
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offset++;
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if ( (giop_version_major < 1) ||
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(giop_version_minor < 2) ) /* earlier than GIOP 1.2 */
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{
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col_add_fstr (pinfo->cinfo, COL_INFO, "Version %u.%u",
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giop_version_major, giop_version_minor);
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expert_add_info_format(pinfo, ti, &ei_ziop_version,
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"Version %u.%u not supported",
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giop_version_major,
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giop_version_minor);
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call_data_dissector(tvb, pinfo, tree);
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return tvb_reported_length(tvb);
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}
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flags = tvb_get_guint8(tvb, offset);
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byte_order = (flags & 0x01) ? ENC_LITTLE_ENDIAN : ENC_BIG_ENDIAN;
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if (flags & 0x01) {
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label = "little-endian";
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}
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proto_tree_add_uint_format_value(ziop_tree, hf_ziop_flags, tvb, offset, 1,
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flags, "0x%02x (%s)", flags, label);
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offset++;
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proto_tree_add_item(ziop_tree, hf_ziop_message_type, tvb, offset, 1, ENC_BIG_ENDIAN);
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message_type = tvb_get_guint8(tvb, offset);
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offset++;
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col_add_fstr (pinfo->cinfo, COL_INFO, "ZIOP %u.%u %s",
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giop_version_major,
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giop_version_minor,
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val_to_str(message_type, giop_message_types,
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"Unknown message type (0x%02x)")
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);
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proto_tree_add_item(ziop_tree, hf_ziop_message_size, tvb, offset, 4, byte_order);
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offset += 4;
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proto_tree_add_item(ziop_tree, hf_ziop_compressor_id, tvb, offset, 2, byte_order);
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offset += 4;
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proto_tree_add_item(ziop_tree, hf_ziop_original_length, tvb, offset, 4, byte_order);
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return tvb_reported_length(tvb);
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}
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static guint
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get_ziop_pdu_len(packet_info *pinfo _U_, tvbuff_t *tvb, int offset, void *data _U_)
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{
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guint8 flags;
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guint message_size;
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gboolean stream_is_big_endian;
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if ( tvb_memeql(tvb, 0, ZIOP_MAGIC, 4) != 0)
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return 0;
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flags = tvb_get_guint8(tvb, offset + 6);
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stream_is_big_endian = ((flags & 0x1) == 0);
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if (stream_is_big_endian)
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message_size = tvb_get_ntohl(tvb, offset + 8);
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else
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message_size = tvb_get_letohl(tvb, offset + 8);
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return message_size + ZIOP_HEADER_SIZE;
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}
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static int
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dissect_ziop_tcp (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void* data)
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{
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if ( tvb_memeql(tvb, 0, ZIOP_MAGIC, 4) != 0)
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{
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if (tvb_get_ntohl(tvb, 0) == GIOP_MAGIC_NUMBER)
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{
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dissect_giop(tvb, pinfo, tree);
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return tvb_captured_length(tvb);
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}
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return 0;
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}
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tcp_dissect_pdus(tvb, pinfo, tree, ziop_desegment, ZIOP_HEADER_SIZE,
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get_ziop_pdu_len, dissect_ziop, data);
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return tvb_captured_length(tvb);
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}
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gboolean
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dissect_ziop_heur (tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void * data)
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{
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guint tot_len;
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conversation_t *conversation;
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/* check magic number and version */
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tot_len = tvb_captured_length(tvb);
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if (tot_len < ZIOP_HEADER_SIZE) /* tot_len < 12 */
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{
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/* Not enough data captured to hold the ZIOP header; don't try
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to interpret it as GIOP. */
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return FALSE;
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}
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if ( tvb_memeql(tvb, 0, ZIOP_MAGIC, 4) != 0)
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{
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return FALSE;
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}
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if ( pinfo->ptype == PT_TCP )
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{
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/*
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* Make the ZIOP dissector the dissector for this conversation.
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*
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* If this isn't the first time this packet has been processed,
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* we've already done this work, so we don't need to do it
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* again.
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*/
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if (!pinfo->fd->flags.visited)
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{
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conversation = find_or_create_conversation(pinfo);
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/* Set dissector */
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conversation_set_dissector(conversation, ziop_tcp_handle);
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}
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dissect_ziop_tcp (tvb, pinfo, tree, data);
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}
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else
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{
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dissect_ziop (tvb, pinfo, tree, data);
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}
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return TRUE;
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}
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void
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proto_register_ziop (void)
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{
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/* A header field is something you can search/filter on.
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*
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* We create a structure to register our fields. It consists of an
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* array of hf_register_info structures, each of which are of the format
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* {&(field id), {name, abbrev, type, display, strings, bitmask, blurb, HFILL}}.
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*/
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static hf_register_info hf[] = {
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{ &hf_ziop_magic,
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{ "Header magic", "ziop.magic", FT_STRING, BASE_NONE, NULL, 0x0,
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"ZIOPHeader magic", HFILL }},
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{ &hf_ziop_giop_version_major,
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{ "Header major version", "ziop.giop_version_major", FT_UINT8, BASE_OCT, NULL, 0x0,
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"ZIOPHeader giop_major_version", HFILL }},
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{ &hf_ziop_giop_version_minor,
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{ "Header minor version", "ziop.giop_version_minor", FT_UINT8, BASE_OCT, NULL, 0x0,
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"ZIOPHeader giop_minor_version", HFILL }},
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{ &hf_ziop_flags,
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{ "Header flags", "ziop.flags", FT_UINT8, BASE_OCT, NULL, 0x0,
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"ZIOPHeader flags", HFILL }},
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{ &hf_ziop_message_type,
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{ "Header type", "ziop.message_type", FT_UINT8, BASE_OCT, VALS(giop_message_types), 0x0,
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"ZIOPHeader message_type", HFILL }},
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{ &hf_ziop_message_size,
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{ "Header size", "ziop.message_size", FT_UINT32, BASE_DEC, NULL, 0x0,
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"ZIOPHeader message_size", HFILL }},
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{ &hf_ziop_compressor_id,
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{ "Header compressor id", "ziop.compressor_id", FT_UINT16, BASE_DEC, VALS(ziop_compressor_ids), 0x0,
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"ZIOPHeader compressor_id", HFILL }},
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{ &hf_ziop_original_length,
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{ "Header original length", "ziop.original_length", FT_UINT32, BASE_DEC, NULL, 0x0,
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"ZIOP original_length", HFILL }}
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};
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static gint *ett[] = {
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&ett_ziop
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};
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static ei_register_info ei[] = {
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{ &ei_ziop_version, { "ziop.version_not_supported", PI_PROTOCOL, PI_WARN, "Version not supported", EXPFILL }},
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};
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expert_module_t* expert_ziop;
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proto_ziop = proto_register_protocol("Zipped Inter-ORB Protocol", "ZIOP", "ziop");
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proto_register_field_array (proto_ziop, hf, array_length (hf));
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proto_register_subtree_array (ett, array_length (ett));
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expert_ziop = expert_register_protocol(proto_ziop);
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expert_register_field_array(expert_ziop, ei, array_length(ei));
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register_dissector("ziop", dissect_ziop, proto_ziop);
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}
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void
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proto_reg_handoff_ziop (void)
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{
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ziop_tcp_handle = create_dissector_handle(dissect_ziop_tcp, proto_ziop);
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dissector_add_for_decode_as_with_preference("udp.port", ziop_tcp_handle);
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heur_dissector_add("tcp", dissect_ziop_heur, "ZIOP over TCP", "ziop_tcp", proto_ziop, HEURISTIC_ENABLE);
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}
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/*
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* Editor modelines - http://www.wireshark.org/tools/modelines.html
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*
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* Local variables:
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* c-basic-offset: 2
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* tab-width: 8
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* indent-tabs-mode: nil
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* End:
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*
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* vi: set shiftwidth=2 tabstop=8 expandtab:
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* :indentSize=2:tabSize=8:noTabs=true:
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*/
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