forked from osmocom/wireshark
![Alexis La Goutte](/assets/img/avatar_default.png)
Change-Id: I3e2fad7f0307e599802c37040b34c899efb0e603 Reviewed-on: https://code.wireshark.org/review/13328 Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com> Tested-by: Petri Dish Buildbot <buildbot-no-reply@wireshark.org> Reviewed-by: Michael Mann <mmann78@netscape.net>
549 lines
16 KiB
C
549 lines
16 KiB
C
/* packet-lat.c
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* Routines for the disassembly of DEC's LAT protocol
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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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#include "config.h"
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#include <stdlib.h>
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#include <string.h>
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#include <glib.h>
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#include <epan/packet.h>
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#include "etypes.h"
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void proto_register_lat(void);
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void proto_reg_handoff_lat(void);
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/*
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* Information on LAT taken from the Linux "latd" at
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*
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* https://sourceforge.net/projects/linux-decnet/
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*
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* See also
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*
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* http://www.bitsavers.org/pdf/dec/ethernet/lat/AA-NL26A-TE_LAT_Specification_Jun89.pdf
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*/
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static int proto_lat = -1;
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static int hf_lat_rrf = -1;
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static int hf_lat_master = -1;
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static int hf_lat_cmd = -1;
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static int hf_lat_num_slots = -1;
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static int hf_lat_remote_connid = -1;
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static int hf_lat_local_connid = -1;
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static int hf_lat_seq_number = -1;
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static int hf_lat_ack_number = -1;
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static int hf_lat_slotcmd_local_session = -1;
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static int hf_lat_slotcmd_remote_session = -1;
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static int hf_lat_slotcmd_length = -1;
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static int hf_lat_slotcmd_command = -1;
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static int hf_lat_server_circuit_timer = -1;
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static int hf_lat_high_prtcl_ver = -1;
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static int hf_lat_low_prtcl_ver = -1;
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static int hf_lat_cur_prtcl_ver = -1;
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static int hf_lat_cur_prtcl_eco = -1;
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static int hf_lat_msg_inc = -1;
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static int hf_lat_change_flags = -1;
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static int hf_lat_data_link_rcv_frame_size = -1;
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static int hf_lat_node_multicast_timer = -1;
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static int hf_lat_node_status = -1;
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static int hf_lat_node_group_len = -1;
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static int hf_lat_node_groups = -1;
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static int hf_lat_node_name = -1;
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static int hf_lat_node_description = -1;
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static int hf_lat_service_name_count = -1;
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static int hf_lat_service_rating = -1;
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static int hf_lat_service_name = -1;
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static int hf_lat_service_description = -1;
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static int hf_lat_unknown_command_data = -1;
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static gint ett_lat = -1;
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static dissector_handle_t data_handle;
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/* LAT commands. */
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#define LAT_CCMD_RUN 0
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#define LAT_CCMD_START 1
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#define LAT_CCMD_STOP 2
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#define LAT_CCMD_SERVICE_ANNOUNCEMENT 10
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#define LAT_CCMD_COMMAND 12
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#define LAT_CCMD_STATUS 13
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#define LAT_CCMD_SOLICIT_INFORMATION 14
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#define LAT_CCMD_RESPONSE_INFORMATION 15
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static const value_string command_vals[] = {
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{ LAT_CCMD_RUN, "Run" },
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{ LAT_CCMD_START, "Start" },
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{ LAT_CCMD_STOP, "Stop" },
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{ LAT_CCMD_SERVICE_ANNOUNCEMENT, "Service announcement" },
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{ LAT_CCMD_COMMAND, "Command" },
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{ LAT_CCMD_STATUS, "Status" },
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{ LAT_CCMD_SOLICIT_INFORMATION, "Solicit information" },
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{ LAT_CCMD_RESPONSE_INFORMATION, "Response information" },
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{ 0, NULL },
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};
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static void dissect_lat_run(tvbuff_t *tvb, int offset, proto_tree *tree);
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static void dissect_lat_start(tvbuff_t *tvb, int offset, proto_tree *tree);
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static void dissect_lat_stop(tvbuff_t *tvb, int offset, proto_tree *tree);
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static void dissect_lat_service_announcement(tvbuff_t *tvb, int offset, proto_tree *tree);
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static void dissect_lat_command(tvbuff_t *tvb, int offset, proto_tree *tree);
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static void dissect_lat_status(tvbuff_t *tvb, int offset, proto_tree *tree);
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static void dissect_lat_solicit_information(tvbuff_t *tvb, int offset, proto_tree *tree);
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static void dissect_lat_response_information(tvbuff_t *tvb, int offset, proto_tree *tree);
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static int dissect_lat_string(tvbuff_t *tvb, int offset, int hf,
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proto_tree *tree);
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static guint dissect_lat_header(tvbuff_t *tvb, int offset, proto_tree *tree);
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static void dissect_lat_slots(tvbuff_t *tvb, int offset, guint num_slots,
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proto_tree *tree);
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static int
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dissect_lat(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void *data _U_)
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{
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int offset = 0;
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proto_item *ti;
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proto_tree *lat_tree = NULL;
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guint8 command;
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col_add_str(pinfo->cinfo, COL_PROTOCOL, "LAT");
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col_clear(pinfo->cinfo, COL_INFO);
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command = tvb_get_guint8(tvb, offset) >> 2;
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col_add_fstr(pinfo->cinfo, COL_INFO, "%s",
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val_to_str(command, command_vals, "Unknown command (%u)"));
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if (tree) {
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ti = proto_tree_add_item(tree, proto_lat, tvb, offset, -1,
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ENC_NA);
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lat_tree = proto_item_add_subtree(ti, ett_lat);
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/* First byte of LAT header */
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proto_tree_add_item(lat_tree, hf_lat_rrf, tvb, offset, 1,
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ENC_LITTLE_ENDIAN);
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proto_tree_add_item(lat_tree, hf_lat_master, tvb, offset, 1,
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ENC_LITTLE_ENDIAN);
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proto_tree_add_item(lat_tree, hf_lat_cmd, tvb, offset, 1,
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ENC_LITTLE_ENDIAN);
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offset += 1;
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switch (command) {
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case LAT_CCMD_RUN:
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dissect_lat_run(tvb, offset, lat_tree);
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break;
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case LAT_CCMD_START:
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dissect_lat_start(tvb, offset, lat_tree);
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break;
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case LAT_CCMD_STOP:
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dissect_lat_stop(tvb, offset, lat_tree);
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break;
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case LAT_CCMD_SERVICE_ANNOUNCEMENT:
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dissect_lat_service_announcement(tvb, offset, lat_tree);
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break;
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case LAT_CCMD_COMMAND:
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dissect_lat_command(tvb, offset, lat_tree);
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break;
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case LAT_CCMD_STATUS:
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dissect_lat_status(tvb, offset, lat_tree);
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break;
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case LAT_CCMD_SOLICIT_INFORMATION:
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dissect_lat_solicit_information(tvb, offset, lat_tree);
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break;
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case LAT_CCMD_RESPONSE_INFORMATION:
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dissect_lat_response_information(tvb, offset, lat_tree);
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break;
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default:
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proto_tree_add_item(lat_tree, hf_lat_unknown_command_data,
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tvb, offset, -1, ENC_NA);
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break;
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}
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}
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return tvb_captured_length(tvb);
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}
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static void
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dissect_lat_run(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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guint8 num_slots;
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num_slots = dissect_lat_header(tvb, offset, tree);
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offset += 1 + 2 + 2 + 1 + 1;
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dissect_lat_slots(tvb, offset, num_slots, tree);
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}
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static void
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dissect_lat_start(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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dissect_lat_header(tvb, offset, tree);
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/* XXX - dissect the rest of it */
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}
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static void
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dissect_lat_stop(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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dissect_lat_header(tvb, offset, tree);
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/* XXX - dissect the rest of it */
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}
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static const value_string node_status_vals[] = {
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{ 2, "Accepting connections" },
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{ 3, "Not accepting connections" },
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{ 0, NULL },
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};
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static void
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dissect_lat_service_announcement(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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guint8 timer;
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guint8 node_group_len;
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guint8 service_name_count;
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int i;
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timer = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint_format_value(tree, hf_lat_server_circuit_timer, tvb,
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offset, 1, timer, "%u milliseconds", timer*10);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_high_prtcl_ver, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_low_prtcl_ver, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_cur_prtcl_ver, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_cur_prtcl_eco, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_msg_inc, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_change_flags, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_data_link_rcv_frame_size, tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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timer = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint_format(tree, hf_lat_node_multicast_timer, tvb,
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offset, 1, timer, "Multicast timer: %u seconds", timer);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_node_status, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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node_group_len = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(tree, hf_lat_node_group_len, tvb, offset, 1,
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node_group_len);
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offset += 1;
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/* This is a bitmask */
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proto_tree_add_item(tree, hf_lat_node_groups, tvb, offset, node_group_len, ENC_NA);
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offset += node_group_len;
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offset = dissect_lat_string(tvb, offset, hf_lat_node_name, tree);
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offset = dissect_lat_string(tvb, offset, hf_lat_node_description, tree);
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service_name_count = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(tree, hf_lat_service_name_count, tvb, offset, 1,
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service_name_count);
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offset += 1;
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for (i = 0; i < service_name_count; i++) {
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proto_tree_add_item(tree, hf_lat_service_rating, tvb,
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offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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offset = dissect_lat_string(tvb, offset, hf_lat_service_name,
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tree);
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offset = dissect_lat_string(tvb, offset, hf_lat_service_description,
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tree);
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}
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/* XXX - more to dissect here */
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}
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static void
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dissect_lat_command(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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/* XXX - dissect this */
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proto_tree_add_item(tree, hf_lat_unknown_command_data,
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tvb, offset, -1, ENC_NA);
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}
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static void
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dissect_lat_status(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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/* XXX - dissect this */
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proto_tree_add_item(tree, hf_lat_unknown_command_data,
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tvb, offset, -1, ENC_NA);
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}
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static void
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dissect_lat_solicit_information(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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/* XXX - dissect this */
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proto_tree_add_item(tree, hf_lat_unknown_command_data,
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tvb, offset, -1, ENC_NA);
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}
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static void
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dissect_lat_response_information(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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/* XXX - dissect this */
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proto_tree_add_item(tree, hf_lat_unknown_command_data,
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tvb, offset, -1, ENC_NA);
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}
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static int
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dissect_lat_string(tvbuff_t *tvb, int offset, int hf, proto_tree *tree)
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{
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gint item_length;
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proto_tree_add_item_ret_length(tree, hf, tvb, offset, 1, ENC_LITTLE_ENDIAN, &item_length);
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return offset + item_length;
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}
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static guint
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dissect_lat_header(tvbuff_t *tvb, int offset, proto_tree *tree)
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{
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guint8 num_slots;
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num_slots = tvb_get_guint8(tvb, offset);
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proto_tree_add_uint(tree, hf_lat_num_slots, tvb, offset, 1,
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num_slots);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_remote_connid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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proto_tree_add_item(tree, hf_lat_local_connid, tvb, offset, 2, ENC_LITTLE_ENDIAN);
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offset += 2;
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proto_tree_add_item(tree, hf_lat_seq_number, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_ack_number, tvb, offset, 1, ENC_LITTLE_ENDIAN);
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/*offset += 1;*/
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return num_slots;
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}
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static void
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dissect_lat_slots(tvbuff_t *tvb, int offset, guint num_slots,
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proto_tree *tree)
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{
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guint i;
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for (i = 0; i < num_slots; i++) {
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proto_tree_add_item(tree, hf_lat_slotcmd_local_session,
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tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_slotcmd_remote_session,
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tvb, offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_slotcmd_length, tvb,
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offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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proto_tree_add_item(tree, hf_lat_slotcmd_command, tvb,
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offset, 1, ENC_LITTLE_ENDIAN);
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offset += 1;
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}
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}
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void
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proto_register_lat(void)
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{
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static hf_register_info hf[] = {
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{ &hf_lat_rrf,
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{ "RRF", "lat.rrf", FT_BOOLEAN, 8,
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NULL, 0x01, NULL, HFILL}},
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{ &hf_lat_master,
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{ "Master", "lat.master", FT_BOOLEAN, 8,
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NULL, 0x02, NULL, HFILL}},
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{ &hf_lat_cmd,
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{ "Command", "lat.command", FT_UINT8, BASE_DEC,
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VALS(command_vals), 0xFC, NULL, HFILL}},
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{ &hf_lat_num_slots,
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{ "Number of slots", "lat.num_slots", FT_UINT8, BASE_DEC,
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NULL, 0x0, NULL, HFILL}},
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{ &hf_lat_remote_connid,
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{ "Remote connection ID", "lat.remote_connid", FT_UINT16,
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BASE_HEX, NULL, 0x0, NULL, HFILL}},
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{ &hf_lat_local_connid,
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{ "Local connection ID", "lat.local_connid", FT_UINT16,
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BASE_HEX, NULL, 0x0, NULL, HFILL}},
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{ &hf_lat_seq_number,
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{ "Sequence number", "lat.seq_number", FT_UINT8,
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BASE_DEC, NULL, 0x0, NULL, HFILL}},
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{ &hf_lat_ack_number,
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{ "Ack number", "lat.ack_number", FT_UINT8,
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BASE_DEC, NULL, 0x0, NULL, HFILL}},
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{ &hf_lat_slotcmd_local_session,
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{ "Local session", "lat.slotcmd.local_session", FT_UINT8,
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BASE_DEC, NULL, 0x0, NULL, HFILL}},
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{ &hf_lat_slotcmd_remote_session,
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{ "Remote session", "lat.slotcmd.remote_session", FT_UINT8,
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BASE_DEC, NULL, 0x0, NULL, HFILL}},
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{ &hf_lat_slotcmd_length,
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{ "Length", "lat.slotcmd.length", FT_UINT8,
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BASE_DEC, NULL, 0x0, NULL, HFILL}},
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{ &hf_lat_slotcmd_command,
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{ "Command", "lat.slotcmd.command", FT_UINT8,
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BASE_HEX, NULL, 0x0, NULL, HFILL}},
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{ &hf_lat_server_circuit_timer,
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{ "Server circuit timer", "lat.server_circuit_timer", FT_UINT8,
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BASE_DEC, NULL, 0x0, NULL, HFILL}},
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{ &hf_lat_high_prtcl_ver,
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{ "Highest protocol version supported", "lat.high_prtcl_ver", FT_UINT8,
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BASE_DEC, NULL, 0x0, NULL, HFILL}},
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|
|
{ &hf_lat_low_prtcl_ver,
|
|
{ "Lowest protocol version supported", "lat.low_prtcl_ver", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_cur_prtcl_ver,
|
|
{ "Protocol version of this message", "lat.cur_prtcl_ver", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_cur_prtcl_eco,
|
|
{ "ECO level of current protocol version", "lat.cur_prtcl_eco", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_msg_inc,
|
|
{ "Message incarnation", "lat.msg_inc", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_change_flags,
|
|
{ "Change flags", "lat.change_flags", FT_UINT8,
|
|
BASE_HEX, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_data_link_rcv_frame_size,
|
|
{ "Maximum LAT message size", "lat.data_link_rcv_frame_size", FT_UINT16,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_node_multicast_timer,
|
|
{ "Node multicast timer", "lat.node_multicast_timer", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_node_status,
|
|
{ "Node status", "lat.node_status", FT_UINT8,
|
|
BASE_DEC, VALS(node_status_vals), 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_node_group_len,
|
|
{ "Node group length", "lat.node_group_len", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_node_groups,
|
|
{ "Node groups", "lat.node_groups", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_node_name,
|
|
{ "Node name", "lat.node_name", FT_UINT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_node_description,
|
|
{ "Node description", "lat.node_description", FT_UINT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_service_name_count,
|
|
{ "Number of service names", "lat.service_name_count", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_service_rating,
|
|
{ "Service rating", "lat.service.rating", FT_UINT8,
|
|
BASE_DEC, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_service_name,
|
|
{ "Service name", "lat.service.name", FT_UINT_STRING,
|
|
BASE_NONE, NULL, 0x0,
|
|
NULL, HFILL}},
|
|
|
|
{ &hf_lat_service_description,
|
|
{ "Service description", "lat.service.description", FT_UINT_STRING,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
|
|
{ &hf_lat_unknown_command_data,
|
|
{ "Unknown command data", "lat.unknown_command_data", FT_BYTES,
|
|
BASE_NONE, NULL, 0x0, NULL, HFILL}},
|
|
};
|
|
static gint *ett[] = {
|
|
&ett_lat,
|
|
};
|
|
|
|
proto_lat = proto_register_protocol("Local Area Transport",
|
|
"LAT", "lat");
|
|
proto_register_field_array(proto_lat, hf, array_length(hf));
|
|
proto_register_subtree_array(ett, array_length(ett));
|
|
}
|
|
|
|
void
|
|
proto_reg_handoff_lat(void)
|
|
{
|
|
dissector_handle_t lat_handle;
|
|
|
|
data_handle = find_dissector("data");
|
|
lat_handle = create_dissector_handle(dissect_lat, proto_lat);
|
|
dissector_add_uint("ethertype", ETHERTYPE_LAT, lat_handle);
|
|
}
|
|
|
|
/*
|
|
* 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:
|
|
*/
|