forked from osmocom/wireshark
![Michael Mann](/assets/img/avatar_default.png)
Bug: 9827 Change-Id: I8fdba4827b164bd231981bfdd2e1bd0499f4f87c Reviewed-on: https://code.wireshark.org/review/9669 Petri-Dish: Michael Mann <mmann78@netscape.net> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com> Reviewed-by: Michael Mann <mmann78@netscape.net>
941 lines
33 KiB
C
941 lines
33 KiB
C
/* packet-frame.c
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*
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* Top-most dissector. Decides dissector based on Wiretap Encapsulation Type.
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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 2000 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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#include "config.h"
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#ifdef _MSC_VER
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#include <windows.h>
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#endif
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#include <epan/packet.h>
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#include <epan/epan.h>
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#include <epan/exceptions.h>
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#include <epan/show_exception.h>
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#include <epan/timestamp.h>
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#include <epan/prefs.h>
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#include <epan/to_str.h>
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#include <wiretap/wtap.h>
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#include <epan/tap.h>
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#include <epan/expert.h>
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#include <wsutil/md5.h>
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#include "packet-frame.h"
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#include "log.h"
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#include "color.h"
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#include "color_filters.h"
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void proto_register_frame(void);
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void proto_reg_handoff_frame(void);
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static int proto_frame = -1;
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static int proto_pkt_comment = -1;
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static int hf_frame_arrival_time = -1;
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static int hf_frame_shift_offset = -1;
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static int hf_frame_arrival_time_epoch = -1;
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static int hf_frame_time_delta = -1;
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static int hf_frame_time_delta_displayed = -1;
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static int hf_frame_time_relative = -1;
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static int hf_frame_time_reference = -1;
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static int hf_frame_number = -1;
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static int hf_frame_len = -1;
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static int hf_frame_capture_len = -1;
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static int hf_frame_p2p_dir = -1;
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static int hf_frame_file_off = -1;
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static int hf_frame_md5_hash = -1;
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static int hf_frame_marked = -1;
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static int hf_frame_ignored = -1;
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static int hf_link_number = -1;
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static int hf_frame_protocols = -1;
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static int hf_frame_color_filter_name = -1;
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static int hf_frame_color_filter_text = -1;
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static int hf_frame_interface_id = -1;
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static int hf_frame_pack_flags = -1;
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static int hf_frame_pack_direction = -1;
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static int hf_frame_pack_reception_type = -1;
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static int hf_frame_pack_fcs_length = -1;
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static int hf_frame_pack_reserved = -1;
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static int hf_frame_pack_crc_error = -1;
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static int hf_frame_pack_wrong_packet_too_long_error = -1;
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static int hf_frame_pack_wrong_packet_too_short_error = -1;
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static int hf_frame_pack_wrong_inter_frame_gap_error = -1;
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static int hf_frame_pack_unaligned_frame_error = -1;
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static int hf_frame_pack_start_frame_delimiter_error = -1;
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static int hf_frame_pack_preamble_error = -1;
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static int hf_frame_pack_symbol_error = -1;
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static int hf_frame_wtap_encap = -1;
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static int hf_comments_text = -1;
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static gint ett_frame = -1;
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static gint ett_flags = -1;
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static gint ett_comments = -1;
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static expert_field ei_comments_text = EI_INIT;
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static expert_field ei_arrive_time_out_of_range = EI_INIT;
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static expert_field ei_incomplete = EI_INIT;
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static int frame_tap = -1;
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static dissector_handle_t data_handle;
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static dissector_handle_t docsis_handle;
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/* Preferences */
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static gboolean show_file_off = FALSE;
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static gboolean force_docsis_encap = FALSE;
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static gboolean generate_md5_hash = FALSE;
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static gboolean generate_epoch_time = TRUE;
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static gboolean generate_bits_field = TRUE;
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static gboolean disable_packet_size_limited_in_summary = FALSE;
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static const value_string p2p_dirs[] = {
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{ P2P_DIR_UNKNOWN, "Unknown" },
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{ P2P_DIR_SENT, "Sent" },
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{ P2P_DIR_RECV, "Received" },
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{ 0, NULL }
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};
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#define PACKET_WORD_DIRECTION_MASK 0x00000003
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#define PACKET_WORD_RECEPTION_TYPE_MASK 0x0000001C
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#define PACKET_WORD_FCS_LENGTH_MASK 0x000001E0
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#define PACKET_WORD_RESERVED_MASK 0x0000FE00
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#define PACKET_WORD_CRC_ERR_MASK 0x01000000
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#define PACKET_WORD_PACKET_TOO_LONG_ERR_MASK 0x02000000
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#define PACKET_WORD_PACKET_TOO_SHORT_ERR_MASK 0x04000000
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#define PACKET_WORD_WRONG_INTER_FRAME_GAP_ERR_MASK 0x08000000
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#define PACKET_WORD_UNALIGNED_FRAME_ERR_MASK 0x10000000
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#define PACKET_WORD_START_FRAME_DELIMITER_ERR_MASK 0x20000000
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#define PACKET_WORD_PREAMBLE_ERR_MASK 0x40000000
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#define PACKET_WORD_SYMBOL_ERR_MASK 0x80000000
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static const value_string packet_word_directions[] = {
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{ 0x00, "Not available" },
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{ 0x01, "Inbound" },
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{ 0x02, "Outbound" },
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{ 0x03, "Undefined" },
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{ 0, NULL }
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};
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static const value_string packet_word_reception_types[] = {
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{ 0x00, "Not specified" },
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{ 0x01, "Unicast" },
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{ 0x02, "Multicast" },
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{ 0x03, "Broadcast" },
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{ 0x04, "Promiscuous" },
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{ 0x05, "Undefined" },
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{ 0x06, "Undefined" },
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{ 0x07, "Undefined" },
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{ 0, NULL }
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};
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dissector_table_t wtap_encap_dissector_table;
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static dissector_table_t wtap_fts_rec_dissector_table;
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/*
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* Routine used to register frame end routine. The routine should only
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* be registered when the dissector is used in the frame, not in the
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* proto_register_XXX function.
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*/
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void
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register_frame_end_routine(packet_info *pinfo, void (*func)(void))
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{
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pinfo->frame_end_routines = g_slist_append(pinfo->frame_end_routines, (gpointer)func);
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}
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typedef void (*void_func_t)(void);
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static void
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call_frame_end_routine(gpointer routine, gpointer dummy _U_)
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{
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void_func_t func = (void_func_t)routine;
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(*func)();
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}
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static int
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dissect_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *parent_tree, void* data)
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{
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proto_item *volatile ti = NULL, *comment_item;
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guint cap_len = 0, frame_len = 0;
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proto_tree *volatile tree;
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proto_tree *comments_tree;
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proto_item *item;
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const gchar *cap_plurality, *frame_plurality;
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frame_data_t *fr_data = (frame_data_t*)data;
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tree=parent_tree;
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switch (pinfo->phdr->rec_type) {
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case REC_TYPE_PACKET:
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pinfo->current_proto = "Frame";
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if (pinfo->pseudo_header != NULL) {
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switch (pinfo->fd->lnk_t) {
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case WTAP_ENCAP_WFLEET_HDLC:
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case WTAP_ENCAP_CHDLC_WITH_PHDR:
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case WTAP_ENCAP_PPP_WITH_PHDR:
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case WTAP_ENCAP_SDLC:
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case WTAP_ENCAP_BLUETOOTH_H4_WITH_PHDR:
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pinfo->p2p_dir = pinfo->pseudo_header->p2p.sent ?
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P2P_DIR_SENT : P2P_DIR_RECV;
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break;
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case WTAP_ENCAP_BLUETOOTH_HCI:
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pinfo->p2p_dir = pinfo->pseudo_header->bthci.sent;
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break;
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case WTAP_ENCAP_LAPB:
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case WTAP_ENCAP_FRELAY_WITH_PHDR:
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pinfo->p2p_dir =
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(pinfo->pseudo_header->x25.flags & FROM_DCE) ?
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P2P_DIR_RECV : P2P_DIR_SENT;
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break;
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case WTAP_ENCAP_ISDN:
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case WTAP_ENCAP_V5_EF:
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case WTAP_ENCAP_DPNSS:
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case WTAP_ENCAP_BACNET_MS_TP_WITH_PHDR:
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pinfo->p2p_dir = pinfo->pseudo_header->isdn.uton ?
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P2P_DIR_SENT : P2P_DIR_RECV;
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break;
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case WTAP_ENCAP_LINUX_LAPD:
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pinfo->p2p_dir = (pinfo->pseudo_header->lapd.pkttype == 3 ||
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pinfo->pseudo_header->lapd.pkttype == 4) ?
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P2P_DIR_SENT : P2P_DIR_RECV;
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break;
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case WTAP_ENCAP_MTP2_WITH_PHDR:
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pinfo->p2p_dir = pinfo->pseudo_header->mtp2.sent ?
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P2P_DIR_SENT : P2P_DIR_RECV;
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pinfo->link_number = pinfo->pseudo_header->mtp2.link_number;
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break;
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case WTAP_ENCAP_GSM_UM:
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pinfo->p2p_dir = pinfo->pseudo_header->gsm_um.uplink ?
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P2P_DIR_SENT : P2P_DIR_RECV;
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break;
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}
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}
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break;
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case REC_TYPE_FT_SPECIFIC_EVENT:
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pinfo->current_proto = "Event";
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break;
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case REC_TYPE_FT_SPECIFIC_REPORT:
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pinfo->current_proto = "Report";
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break;
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default:
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g_assert_not_reached();
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break;
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}
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if (fr_data && fr_data->pkt_comment) {
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item = proto_tree_add_item(tree, proto_pkt_comment, tvb, 0, 0, ENC_NA);
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comments_tree = proto_item_add_subtree(item, ett_comments);
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comment_item = proto_tree_add_string_format(comments_tree, hf_comments_text, tvb, 0, 0,
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fr_data->pkt_comment, "%s",
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fr_data->pkt_comment);
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expert_add_info_format(pinfo, comment_item, &ei_comments_text,
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"%s", fr_data->pkt_comment);
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}
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/* if FRAME is not referenced from any filters we don't need to worry about
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generating any tree items. */
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if (!proto_field_is_referenced(tree, proto_frame)) {
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tree=NULL;
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if (pinfo->fd->flags.has_ts) {
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if (pinfo->fd->abs_ts.nsecs < 0 || pinfo->fd->abs_ts.nsecs >= 1000000000)
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expert_add_info(pinfo, NULL, &ei_arrive_time_out_of_range);
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}
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} else {
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proto_tree *fh_tree;
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gboolean old_visible;
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/* Put in frame header information. */
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cap_len = tvb_captured_length(tvb);
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frame_len = tvb_reported_length(tvb);
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cap_plurality = plurality(cap_len, "", "s");
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frame_plurality = plurality(frame_len, "", "s");
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ti = proto_tree_add_protocol_format(tree, proto_frame, tvb, 0, tvb_captured_length(tvb),
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"Frame %u: %u byte%s on wire",
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pinfo->fd->num, frame_len, frame_plurality);
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if (generate_bits_field)
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proto_item_append_text(ti, " (%u bits)", frame_len * 8);
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proto_item_append_text(ti, ", %u byte%s captured",
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cap_len, cap_plurality);
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if (generate_bits_field) {
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proto_item_append_text(ti, " (%u bits)",
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cap_len * 8);
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}
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if (pinfo->phdr->presence_flags & WTAP_HAS_INTERFACE_ID) {
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proto_item_append_text(ti, " on interface %u",
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pinfo->phdr->interface_id);
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}
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if (pinfo->phdr->presence_flags & WTAP_HAS_PACK_FLAGS) {
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if (pinfo->phdr->pack_flags & 0x00000001) {
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proto_item_append_text(ti, " (inbound)");
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pinfo->p2p_dir = P2P_DIR_RECV;
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}
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if (pinfo->phdr->pack_flags & 0x00000002) {
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proto_item_append_text(ti, " (outbound)");
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pinfo->p2p_dir = P2P_DIR_SENT;
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}
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}
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fh_tree = proto_item_add_subtree(ti, ett_frame);
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if (pinfo->phdr->presence_flags & WTAP_HAS_INTERFACE_ID && proto_field_is_referenced(tree, hf_frame_interface_id)) {
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const char *interface_name = epan_get_interface_name(pinfo->epan, pinfo->phdr->interface_id);
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if (interface_name)
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proto_tree_add_uint_format_value(fh_tree, hf_frame_interface_id, tvb, 0, 0, pinfo->phdr->interface_id, "%u (%s)", pinfo->phdr->interface_id, interface_name);
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else
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proto_tree_add_uint(fh_tree, hf_frame_interface_id, tvb, 0, 0, pinfo->phdr->interface_id);
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}
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if (pinfo->phdr->presence_flags & WTAP_HAS_PACK_FLAGS) {
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proto_tree *flags_tree;
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proto_item *flags_item;
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flags_item = proto_tree_add_uint(fh_tree, hf_frame_pack_flags, tvb, 0, 0, pinfo->phdr->pack_flags);
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flags_tree = proto_item_add_subtree(flags_item, ett_flags);
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proto_tree_add_uint(flags_tree, hf_frame_pack_direction, tvb, 0, 0, pinfo->phdr->pack_flags);
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proto_tree_add_uint(flags_tree, hf_frame_pack_reception_type, tvb, 0, 0, pinfo->phdr->pack_flags);
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proto_tree_add_uint(flags_tree, hf_frame_pack_fcs_length, tvb, 0, 0, pinfo->phdr->pack_flags);
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proto_tree_add_uint(flags_tree, hf_frame_pack_reserved, tvb, 0, 0, pinfo->phdr->pack_flags);
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proto_tree_add_boolean(flags_tree, hf_frame_pack_crc_error, tvb, 0, 0, pinfo->phdr->pack_flags);
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proto_tree_add_boolean(flags_tree, hf_frame_pack_wrong_packet_too_long_error, tvb, 0, 0, pinfo->phdr->pack_flags);
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proto_tree_add_boolean(flags_tree, hf_frame_pack_wrong_packet_too_short_error, tvb, 0, 0, pinfo->phdr->pack_flags);
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proto_tree_add_boolean(flags_tree, hf_frame_pack_wrong_inter_frame_gap_error, tvb, 0, 0, pinfo->phdr->pack_flags);
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proto_tree_add_boolean(flags_tree, hf_frame_pack_unaligned_frame_error, tvb, 0, 0, pinfo->phdr->pack_flags);
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proto_tree_add_boolean(flags_tree, hf_frame_pack_start_frame_delimiter_error, tvb, 0, 0, pinfo->phdr->pack_flags);
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proto_tree_add_boolean(flags_tree, hf_frame_pack_preamble_error, tvb, 0, 0, pinfo->phdr->pack_flags);
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proto_tree_add_boolean(flags_tree, hf_frame_pack_symbol_error, tvb, 0, 0, pinfo->phdr->pack_flags);
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}
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if (pinfo->phdr->rec_type == REC_TYPE_PACKET)
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proto_tree_add_int(fh_tree, hf_frame_wtap_encap, tvb, 0, 0, pinfo->fd->lnk_t);
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if (pinfo->fd->flags.has_ts) {
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proto_tree_add_time(fh_tree, hf_frame_arrival_time, tvb,
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0, 0, &(pinfo->fd->abs_ts));
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if (pinfo->fd->abs_ts.nsecs < 0 || pinfo->fd->abs_ts.nsecs >= 1000000000) {
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expert_add_info_format(pinfo, ti, &ei_arrive_time_out_of_range,
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"Arrival Time: Fractional second %09ld is invalid,"
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" the valid range is 0-1000000000",
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(long) pinfo->fd->abs_ts.nsecs);
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}
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item = proto_tree_add_time(fh_tree, hf_frame_shift_offset, tvb,
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0, 0, &(pinfo->fd->shift_offset));
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PROTO_ITEM_SET_GENERATED(item);
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if (generate_epoch_time) {
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proto_tree_add_time(fh_tree, hf_frame_arrival_time_epoch, tvb,
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0, 0, &(pinfo->fd->abs_ts));
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}
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if (proto_field_is_referenced(tree, hf_frame_time_delta)) {
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nstime_t del_cap_ts;
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frame_delta_abs_time(pinfo->epan, pinfo->fd, pinfo->fd->num - 1, &del_cap_ts);
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item = proto_tree_add_time(fh_tree, hf_frame_time_delta, tvb,
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0, 0, &(del_cap_ts));
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PROTO_ITEM_SET_GENERATED(item);
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}
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if (proto_field_is_referenced(tree, hf_frame_time_delta_displayed)) {
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nstime_t del_dis_ts;
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frame_delta_abs_time(pinfo->epan, pinfo->fd, pinfo->fd->prev_dis_num, &del_dis_ts);
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item = proto_tree_add_time(fh_tree, hf_frame_time_delta_displayed, tvb,
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0, 0, &(del_dis_ts));
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PROTO_ITEM_SET_GENERATED(item);
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}
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item = proto_tree_add_time(fh_tree, hf_frame_time_relative, tvb,
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0, 0, &(pinfo->rel_ts));
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PROTO_ITEM_SET_GENERATED(item);
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if (pinfo->fd->flags.ref_time) {
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ti = proto_tree_add_item(fh_tree, hf_frame_time_reference, tvb, 0, 0, ENC_NA);
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PROTO_ITEM_SET_GENERATED(ti);
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}
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}
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proto_tree_add_uint(fh_tree, hf_frame_number, tvb,
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0, 0, pinfo->fd->num);
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proto_tree_add_uint_format(fh_tree, hf_frame_len, tvb,
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0, 0, frame_len, "Frame Length: %u byte%s (%u bits)",
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frame_len, frame_plurality, frame_len * 8);
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|
|
proto_tree_add_uint_format(fh_tree, hf_frame_capture_len, tvb,
|
|
0, 0, cap_len, "Capture Length: %u byte%s (%u bits)",
|
|
cap_len, cap_plurality, cap_len * 8);
|
|
|
|
if (generate_md5_hash) {
|
|
const guint8 *cp;
|
|
md5_state_t md_ctx;
|
|
md5_byte_t digest[16];
|
|
const gchar *digest_string;
|
|
|
|
cp = tvb_get_ptr(tvb, 0, cap_len);
|
|
|
|
md5_init(&md_ctx);
|
|
md5_append(&md_ctx, cp, cap_len);
|
|
md5_finish(&md_ctx, digest);
|
|
|
|
digest_string = bytestring_to_str(wmem_packet_scope(), digest, 16, '\0');
|
|
ti = proto_tree_add_string(fh_tree, hf_frame_md5_hash, tvb, 0, 0, digest_string);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
}
|
|
|
|
ti = proto_tree_add_boolean(fh_tree, hf_frame_marked, tvb, 0, 0,pinfo->fd->flags.marked);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
ti = proto_tree_add_boolean(fh_tree, hf_frame_ignored, tvb, 0, 0,pinfo->fd->flags.ignored);
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
|
|
if (proto_field_is_referenced(tree, hf_frame_protocols)) {
|
|
/* we are going to be using proto_item_append_string() on
|
|
* hf_frame_protocols, and we must therefore disable the
|
|
* TRY_TO_FAKE_THIS_ITEM() optimisation for the tree by
|
|
* setting it as visible.
|
|
*
|
|
* See proto.h for details.
|
|
*/
|
|
old_visible = proto_tree_set_visible(fh_tree, TRUE);
|
|
ti = proto_tree_add_string(fh_tree, hf_frame_protocols, tvb, 0, 0, "");
|
|
PROTO_ITEM_SET_GENERATED(ti);
|
|
proto_tree_set_visible(fh_tree, old_visible);
|
|
}
|
|
|
|
/* Check for existences of P2P pseudo header */
|
|
if (pinfo->p2p_dir != P2P_DIR_UNKNOWN) {
|
|
proto_tree_add_int(fh_tree, hf_frame_p2p_dir, tvb,
|
|
0, 0, pinfo->p2p_dir);
|
|
}
|
|
|
|
/* Check for existences of MTP2 link number */
|
|
if ((pinfo->pseudo_header != NULL ) && (pinfo->fd->lnk_t == WTAP_ENCAP_MTP2_WITH_PHDR)) {
|
|
proto_tree_add_uint(fh_tree, hf_link_number, tvb,
|
|
0, 0, pinfo->link_number);
|
|
}
|
|
|
|
if (show_file_off) {
|
|
proto_tree_add_int64_format_value(fh_tree, hf_frame_file_off, tvb,
|
|
0, 0, pinfo->fd->file_off,
|
|
"%" G_GINT64_MODIFIER "d (0x%" G_GINT64_MODIFIER "x)",
|
|
pinfo->fd->file_off, pinfo->fd->file_off);
|
|
}
|
|
|
|
if (pinfo->fd->color_filter != NULL) {
|
|
const color_filter_t *color_filter = (const color_filter_t *)pinfo->fd->color_filter;
|
|
item = proto_tree_add_string(fh_tree, hf_frame_color_filter_name, tvb,
|
|
0, 0, color_filter->filter_name);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
item = proto_tree_add_string(fh_tree, hf_frame_color_filter_text, tvb,
|
|
0, 0, color_filter->filter_text);
|
|
PROTO_ITEM_SET_GENERATED(item);
|
|
}
|
|
}
|
|
|
|
if (pinfo->fd->flags.ignored) {
|
|
/* Ignored package, stop handling here */
|
|
col_set_str(pinfo->cinfo, COL_INFO, "<Ignored>");
|
|
proto_tree_add_boolean_format(tree, hf_frame_ignored, tvb, 0, 0, TRUE, "This frame is marked as ignored");
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
/* Portable Exception Handling to trap Wireshark specific exceptions like BoundsError exceptions */
|
|
TRY {
|
|
#ifdef _MSC_VER
|
|
/* Win32: Visual-C Structured Exception Handling (SEH) to trap hardware exceptions
|
|
like memory access violations.
|
|
(a running debugger will be called before the except part below) */
|
|
/* Note: A Windows "exceptional exception" may leave the kazlib's (Portable Exception Handling)
|
|
stack in an inconsistent state thus causing a crash at some point in the
|
|
handling of the exception.
|
|
See: https://www.wireshark.org/lists/wireshark-dev/200704/msg00243.html
|
|
*/
|
|
__try {
|
|
#endif
|
|
switch (pinfo->phdr->rec_type) {
|
|
|
|
case REC_TYPE_PACKET:
|
|
if ((force_docsis_encap) && (docsis_handle)) {
|
|
call_dissector_with_data(docsis_handle,
|
|
tvb, pinfo, parent_tree,
|
|
(void *)pinfo->pseudo_header);
|
|
} else {
|
|
if (!dissector_try_uint_new(wtap_encap_dissector_table,
|
|
pinfo->fd->lnk_t, tvb, pinfo,
|
|
parent_tree, TRUE,
|
|
(void *)pinfo->pseudo_header)) {
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "UNKNOWN");
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "WTAP_ENCAP = %d",
|
|
pinfo->fd->lnk_t);
|
|
call_dissector_with_data(data_handle,
|
|
tvb, pinfo, parent_tree,
|
|
(void *)pinfo->pseudo_header);
|
|
}
|
|
}
|
|
break;
|
|
|
|
case REC_TYPE_FT_SPECIFIC_EVENT:
|
|
case REC_TYPE_FT_SPECIFIC_REPORT:
|
|
{
|
|
int file_type_subtype = WTAP_FILE_TYPE_SUBTYPE_UNKNOWN;
|
|
|
|
if (fr_data) {
|
|
file_type_subtype = fr_data->file_type_subtype;
|
|
}
|
|
|
|
if (!dissector_try_uint(wtap_fts_rec_dissector_table, file_type_subtype,
|
|
tvb, pinfo, parent_tree)) {
|
|
col_set_str(pinfo->cinfo, COL_PROTOCOL, "UNKNOWN");
|
|
col_add_fstr(pinfo->cinfo, COL_INFO, "WTAP_ENCAP = %d",
|
|
file_type_subtype);
|
|
call_dissector(data_handle,tvb, pinfo, parent_tree);
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
#ifdef _MSC_VER
|
|
} __except(EXCEPTION_EXECUTE_HANDLER /* handle all exceptions */) {
|
|
switch (GetExceptionCode()) {
|
|
case(STATUS_ACCESS_VIOLATION):
|
|
show_exception(tvb, pinfo, parent_tree, DissectorError,
|
|
"STATUS_ACCESS_VIOLATION: dissector accessed an invalid memory address");
|
|
break;
|
|
case(STATUS_INTEGER_DIVIDE_BY_ZERO):
|
|
show_exception(tvb, pinfo, parent_tree, DissectorError,
|
|
"STATUS_INTEGER_DIVIDE_BY_ZERO: dissector tried an integer division by zero");
|
|
break;
|
|
case(STATUS_STACK_OVERFLOW):
|
|
show_exception(tvb, pinfo, parent_tree, DissectorError,
|
|
"STATUS_STACK_OVERFLOW: dissector overflowed the stack (e.g. endless loop)");
|
|
/* XXX - this will have probably corrupted the stack,
|
|
which makes problems later in the exception code */
|
|
break;
|
|
/* XXX - add other hardware exception codes as required */
|
|
default:
|
|
show_exception(tvb, pinfo, parent_tree, DissectorError,
|
|
g_strdup_printf("dissector caused an unknown exception: 0x%x", GetExceptionCode()));
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
CATCH_BOUNDS_AND_DISSECTOR_ERRORS {
|
|
show_exception(tvb, pinfo, parent_tree, EXCEPT_CODE, GET_MESSAGE);
|
|
}
|
|
ENDTRY;
|
|
|
|
if (proto_field_is_referenced(tree, hf_frame_protocols)) {
|
|
wmem_strbuf_t *val = wmem_strbuf_sized_new(wmem_packet_scope(), 128, 0);
|
|
wmem_list_frame_t *frame;
|
|
/* skip the first entry, it's always the "frame" protocol */
|
|
frame = wmem_list_frame_next(wmem_list_head(pinfo->layers));
|
|
if (frame) {
|
|
wmem_strbuf_append(val, proto_get_protocol_filter_name(GPOINTER_TO_UINT(wmem_list_frame_data(frame))));
|
|
frame = wmem_list_frame_next(frame);
|
|
}
|
|
while (frame) {
|
|
wmem_strbuf_append_c(val, ':');
|
|
wmem_strbuf_append(val, proto_get_protocol_filter_name(GPOINTER_TO_UINT(wmem_list_frame_data(frame))));
|
|
frame = wmem_list_frame_next(frame);
|
|
}
|
|
proto_item_append_string(ti, wmem_strbuf_get_str(val));
|
|
}
|
|
|
|
/* Call postdissectors if we have any (while trying to avoid another
|
|
* TRY/CATCH)
|
|
*/
|
|
if (have_postdissector()) {
|
|
TRY {
|
|
#ifdef _MSC_VER
|
|
/* Win32: Visual-C Structured Exception Handling (SEH)
|
|
to trap hardware exceptions like memory access violations */
|
|
/* (a running debugger will be called before the except part below) */
|
|
/* Note: A Windows "exceptional exception" may leave the kazlib's (Portable Exception Handling)
|
|
stack in an inconsistent state thus causing a crash at some point in the
|
|
handling of the exception.
|
|
See: https://www.wireshark.org/lists/wireshark-dev/200704/msg00243.html
|
|
*/
|
|
__try {
|
|
#endif
|
|
call_all_postdissectors(tvb, pinfo, parent_tree);
|
|
#ifdef _MSC_VER
|
|
} __except(EXCEPTION_EXECUTE_HANDLER /* handle all exceptions */) {
|
|
switch (GetExceptionCode()) {
|
|
case(STATUS_ACCESS_VIOLATION):
|
|
show_exception(tvb, pinfo, parent_tree, DissectorError,
|
|
"STATUS_ACCESS_VIOLATION: dissector accessed an invalid memory address");
|
|
break;
|
|
case(STATUS_INTEGER_DIVIDE_BY_ZERO):
|
|
show_exception(tvb, pinfo, parent_tree, DissectorError,
|
|
"STATUS_INTEGER_DIVIDE_BY_ZERO: dissector tried an integer division by zero");
|
|
break;
|
|
case(STATUS_STACK_OVERFLOW):
|
|
show_exception(tvb, pinfo, parent_tree, DissectorError,
|
|
"STATUS_STACK_OVERFLOW: dissector overflowed the stack (e.g. endless loop)");
|
|
/* XXX - this will have probably corrupted the stack,
|
|
which makes problems later in the exception code */
|
|
break;
|
|
/* XXX - add other hardware exception codes as required */
|
|
default:
|
|
show_exception(tvb, pinfo, parent_tree, DissectorError,
|
|
g_strdup_printf("dissector caused an unknown exception: 0x%x", GetExceptionCode()));
|
|
}
|
|
}
|
|
#endif
|
|
}
|
|
CATCH_BOUNDS_AND_DISSECTOR_ERRORS {
|
|
show_exception(tvb, pinfo, parent_tree, EXCEPT_CODE, GET_MESSAGE);
|
|
}
|
|
ENDTRY;
|
|
}
|
|
|
|
tap_queue_packet(frame_tap, pinfo, NULL);
|
|
|
|
|
|
if (pinfo->frame_end_routines) {
|
|
g_slist_foreach(pinfo->frame_end_routines, &call_frame_end_routine, NULL);
|
|
g_slist_free(pinfo->frame_end_routines);
|
|
pinfo->frame_end_routines = NULL;
|
|
}
|
|
|
|
if (prefs.enable_incomplete_dissectors_check && tree && tree->tree_data->visible) {
|
|
gchar* decoded;
|
|
guint length;
|
|
guint i;
|
|
guint byte;
|
|
guint bit;
|
|
|
|
length = tvb_captured_length(tvb);
|
|
decoded = proto_find_undecoded_data(tree, length);
|
|
|
|
for (i = 0; i < length; i++) {
|
|
byte = i / 8;
|
|
bit = i % 8;
|
|
if (!(decoded[byte] & (1 << bit))) {
|
|
field_info* fi = proto_find_field_from_offset(tree, i, tvb);
|
|
if (fi && fi->hfinfo->id != proto_frame) {
|
|
g_log(LOG_DOMAIN_CAPTURE, G_LOG_LEVEL_WARNING,
|
|
"Dissector %s incomplete in frame %u: undecoded byte number %u "
|
|
"(0x%.4X+%u)",
|
|
(fi ? fi->hfinfo->abbrev : "[unknown]"),
|
|
pinfo->fd->num, i, i - i % 16, i % 16);
|
|
expert_add_info_format(pinfo, tree, &ei_incomplete,
|
|
"Undecoded byte number: %u (0x%.4X+%u)", i, i - i % 16, i % 16);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return tvb_captured_length(tvb);
|
|
}
|
|
|
|
void
|
|
proto_register_frame(void)
|
|
{
|
|
static hf_register_info hf[] = {
|
|
{ &hf_frame_arrival_time,
|
|
{ "Arrival Time", "frame.time",
|
|
FT_ABSOLUTE_TIME, ABSOLUTE_TIME_LOCAL, NULL, 0x0,
|
|
"Absolute time when this frame was captured", HFILL }},
|
|
|
|
{ &hf_frame_shift_offset,
|
|
{ "Time shift for this packet", "frame.offset_shift",
|
|
FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
|
|
"Time shift applied to this packet", HFILL }},
|
|
|
|
{ &hf_frame_arrival_time_epoch,
|
|
{ "Epoch Time", "frame.time_epoch",
|
|
FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
|
|
"Epoch time when this frame was captured", HFILL }},
|
|
|
|
{ &hf_frame_time_delta,
|
|
{ "Time delta from previous captured frame", "frame.time_delta",
|
|
FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_time_delta_displayed,
|
|
{ "Time delta from previous displayed frame", "frame.time_delta_displayed",
|
|
FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_time_relative,
|
|
{ "Time since reference or first frame", "frame.time_relative",
|
|
FT_RELATIVE_TIME, BASE_NONE, NULL, 0x0,
|
|
"Time relative to time reference or first frame", HFILL }},
|
|
|
|
{ &hf_frame_time_reference,
|
|
{ "This is a Time Reference frame", "frame.ref_time",
|
|
FT_NONE, BASE_NONE, NULL, 0x0,
|
|
"This frame is a Time Reference frame", HFILL }},
|
|
|
|
{ &hf_frame_number,
|
|
{ "Frame Number", "frame.number",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_len,
|
|
{ "Frame length on the wire", "frame.len",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_capture_len,
|
|
{ "Frame length stored into the capture file", "frame.cap_len",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_md5_hash,
|
|
{ "Frame MD5 Hash", "frame.md5_hash",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_p2p_dir,
|
|
{ "Point-to-Point Direction", "frame.p2p_dir",
|
|
FT_INT8, BASE_DEC, VALS(p2p_dirs), 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_link_number,
|
|
{ "Link Number", "frame.link_nr",
|
|
FT_UINT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_file_off,
|
|
{ "File Offset", "frame.file_off",
|
|
FT_INT64, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_marked,
|
|
{ "Frame is marked", "frame.marked",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Frame is marked in the GUI", HFILL }},
|
|
|
|
{ &hf_frame_ignored,
|
|
{ "Frame is ignored", "frame.ignored",
|
|
FT_BOOLEAN, BASE_NONE, NULL, 0x0,
|
|
"Frame is ignored by the dissectors", HFILL }},
|
|
|
|
{ &hf_frame_protocols,
|
|
{ "Protocols in frame", "frame.protocols",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"Protocols carried by this frame", HFILL }},
|
|
|
|
{ &hf_frame_color_filter_name,
|
|
{ "Coloring Rule Name", "frame.coloring_rule.name",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"The frame matched the coloring rule with this name", HFILL }},
|
|
|
|
{ &hf_frame_color_filter_text,
|
|
{ "Coloring Rule String", "frame.coloring_rule.string",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
"The frame matched this coloring rule string", HFILL }},
|
|
|
|
{ &hf_frame_interface_id,
|
|
{ "Interface id", "frame.interface_id",
|
|
FT_UINT32, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_flags,
|
|
{ "Packet flags", "frame.packet_flags",
|
|
FT_UINT32, BASE_HEX, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_direction,
|
|
{ "Direction", "frame.packet_flags_direction",
|
|
FT_UINT32, BASE_HEX, VALS(packet_word_directions), PACKET_WORD_DIRECTION_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_reception_type,
|
|
{ "Reception type", "frame.packet_flags_reception_type",
|
|
FT_UINT32, BASE_DEC, VALS(packet_word_reception_types), PACKET_WORD_RECEPTION_TYPE_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_fcs_length,
|
|
{ "FCS length", "frame.packet_flags_fcs_length",
|
|
FT_UINT32, BASE_DEC, NULL, PACKET_WORD_FCS_LENGTH_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_reserved,
|
|
{ "Reserved", "frame.packet_flags_reserved",
|
|
FT_UINT32, BASE_DEC, NULL, PACKET_WORD_RESERVED_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_crc_error,
|
|
{ "CRC error", "frame.packet_flags_crc_error",
|
|
FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_CRC_ERR_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_wrong_packet_too_long_error,
|
|
{ "Packet too long error", "frame.packet_flags_packet_too_error",
|
|
FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_PACKET_TOO_LONG_ERR_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_wrong_packet_too_short_error,
|
|
{ "Packet too short error", "frame.packet_flags_packet_too_short_error",
|
|
FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_PACKET_TOO_SHORT_ERR_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_wrong_inter_frame_gap_error,
|
|
{ "Wrong interframe gap error", "frame.packet_flags_wrong_inter_frame_gap_error",
|
|
FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_WRONG_INTER_FRAME_GAP_ERR_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_unaligned_frame_error,
|
|
{ "Unaligned frame error", "frame.packet_flags_unaligned_frame_error",
|
|
FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_UNALIGNED_FRAME_ERR_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_start_frame_delimiter_error,
|
|
{ "Start frame delimiter error", "frame.packet_flags_start_frame_delimiter_error",
|
|
FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_START_FRAME_DELIMITER_ERR_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_preamble_error,
|
|
{ "Preamble error", "frame.packet_flags_preamble_error",
|
|
FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_PREAMBLE_ERR_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_frame_pack_symbol_error,
|
|
{ "Symbol error", "frame.packet_flags_symbol_error",
|
|
FT_BOOLEAN, 32, TFS(&tfs_set_notset), PACKET_WORD_SYMBOL_ERR_MASK,
|
|
NULL, HFILL }},
|
|
|
|
{ &hf_comments_text,
|
|
{ "Comment", "frame.comment",
|
|
FT_STRING, BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL }},
|
|
};
|
|
|
|
static hf_register_info hf_encap =
|
|
{ &hf_frame_wtap_encap,
|
|
{ "Encapsulation type", "frame.encap_type",
|
|
FT_INT16, BASE_DEC, NULL, 0x0,
|
|
NULL, HFILL }};
|
|
|
|
static gint *ett[] = {
|
|
&ett_frame,
|
|
&ett_flags,
|
|
&ett_comments
|
|
};
|
|
|
|
static ei_register_info ei[] = {
|
|
{ &ei_comments_text, { "frame.comment.expert", PI_COMMENTS_GROUP, PI_COMMENT, "Formatted comment", EXPFILL }},
|
|
{ &ei_arrive_time_out_of_range, { "frame.time_invalid", PI_SEQUENCE, PI_NOTE, "Arrival Time: Fractional second out of range (0-1000000000)", EXPFILL }},
|
|
{ &ei_incomplete, { "frame.incomplete", PI_UNDECODED, PI_WARN, "Incomplete dissector", EXPFILL }}
|
|
};
|
|
|
|
module_t *frame_module;
|
|
expert_module_t* expert_frame;
|
|
|
|
if (hf_encap.hfinfo.strings == NULL) {
|
|
int encap_count = wtap_get_num_encap_types();
|
|
value_string *arr;
|
|
int i;
|
|
|
|
hf_encap.hfinfo.strings = arr = g_new(value_string, encap_count+1);
|
|
|
|
for (i = 0; i < encap_count; i++) {
|
|
arr[i].value = i;
|
|
arr[i].strptr = wtap_encap_string(i);
|
|
}
|
|
arr[encap_count].value = 0;
|
|
arr[encap_count].strptr = NULL;
|
|
}
|
|
|
|
wtap_encap_dissector_table = register_dissector_table("wtap_encap",
|
|
"Wiretap encapsulation type", FT_UINT32, BASE_DEC);
|
|
wtap_fts_rec_dissector_table = register_dissector_table("wtap_fts_rec",
|
|
"Wiretap file type for file-type-specific records", FT_UINT32, BASE_DEC);
|
|
|
|
proto_frame = proto_register_protocol("Frame", "Frame", "frame");
|
|
proto_pkt_comment = proto_register_protocol("Packet comments", "Pkt_Comment", "pkt_comment");
|
|
proto_register_field_array(proto_frame, hf, array_length(hf));
|
|
proto_register_field_array(proto_frame, &hf_encap, 1);
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
expert_frame = expert_register_protocol(proto_frame);
|
|
expert_register_field_array(expert_frame, ei, array_length(ei));
|
|
new_register_dissector("frame",dissect_frame,proto_frame);
|
|
|
|
/* You can't disable dissection of "Frame", as that would be
|
|
tantamount to not doing any dissection whatsoever. */
|
|
proto_set_cant_toggle(proto_frame);
|
|
|
|
/* Our preferences */
|
|
frame_module = prefs_register_protocol(proto_frame, NULL);
|
|
prefs_register_bool_preference(frame_module, "show_file_off",
|
|
"Show File Offset", "Show offset of frame in capture file", &show_file_off);
|
|
prefs_register_bool_preference(frame_module, "force_docsis_encap",
|
|
"Treat all frames as DOCSIS frames", "Treat all frames as DOCSIS Frames", &force_docsis_encap);
|
|
prefs_register_bool_preference(frame_module, "generate_md5_hash",
|
|
"Generate an MD5 hash of each frame",
|
|
"Whether or not MD5 hashes should be generated for each frame, useful for finding duplicate frames.",
|
|
&generate_md5_hash);
|
|
prefs_register_bool_preference(frame_module, "generate_epoch_time",
|
|
"Generate an epoch time entry for each frame",
|
|
"Whether or not an Epoch time entry should be generated for each frame.",
|
|
&generate_epoch_time);
|
|
prefs_register_bool_preference(frame_module, "generate_bits_field",
|
|
"Show the number of bits in the frame",
|
|
"Whether or not the number of bits in the frame should be shown.",
|
|
&generate_bits_field);
|
|
prefs_register_bool_preference(frame_module, "disable_packet_size_limited_in_summary",
|
|
"Disable 'packet size limited during capture' message in summary",
|
|
"Whether or not 'packet size limited during capture' message in shown in Info column.",
|
|
&disable_packet_size_limited_in_summary);
|
|
|
|
frame_tap=register_tap("frame");
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_frame(void)
|
|
{
|
|
data_handle = find_dissector("data");
|
|
docsis_handle = find_dissector("docsis");
|
|
}
|
|
|
|
/*
|
|
* Editor modelines - http://www.wireshark.org/tools/modelines.html
|
|
*
|
|
* Local variables:
|
|
* c-basic-offset: 8
|
|
* tab-width: 8
|
|
* indent-tabs-mode: t
|
|
* End:
|
|
*
|
|
* vi: set shiftwidth=8 tabstop=8 noexpandtab:
|
|
* :indentSize=8:tabSize=8:noTabs=false:
|
|
*/
|