forked from osmocom/wireshark
Add Arista Vendor Specific Protocol (Ethertype) dissector
Bug: 14550 Change-Id: I08d54825eb054255167eb28469b7fb854507e4ed Reviewed-on: https://code.wireshark.org/review/26492 Petri-Dish: Alexis La Goutte <alexis.lagoutte@gmail.com> Tested-by: Petri Dish Buildbot Reviewed-by: Alexis La Goutte <alexis.lagoutte@gmail.com>
This commit is contained in:
Nikhil AP
Alexis La Goutte
parent
2e02b438cc
commit
c55d15783c
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@ -100,6 +100,7 @@ since version 2.4.0:
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--
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ActiveMQ Artemis Core Protocol
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AMT (Automatic Multicast Tunneling)
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AVSP (Arista Vendor Specific Protocol)
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Bluetooth Mesh
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Broadcom tags (Broadcom Ethernet switch management frames)
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CVS password server
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@ -675,6 +675,7 @@ set(DISSECTOR_SRC
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${CMAKE_CURRENT_SOURCE_DIR}/packet-atm.c
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${CMAKE_CURRENT_SOURCE_DIR}/packet-atmtcp.c
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${CMAKE_CURRENT_SOURCE_DIR}/packet-auto_rp.c
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${CMAKE_CURRENT_SOURCE_DIR}/packet-avsp.c
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${CMAKE_CURRENT_SOURCE_DIR}/packet-ax25.c
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${CMAKE_CURRENT_SOURCE_DIR}/packet-ax25-kiss.c
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${CMAKE_CURRENT_SOURCE_DIR}/packet-ax25-nol3.c
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@ -293,6 +293,7 @@ DISSECTOR_SRC = \
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packet-atm.c \
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packet-atmtcp.c \
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packet-auto_rp.c \
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packet-avsp.c \
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packet-ax25.c \
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packet-ax25-kiss.c \
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packet-ax25-nol3.c \
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@ -0,0 +1,224 @@
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/* packet-avsp.c
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* Arista Vendor Specific ethertype Protocol (AVSP)
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*
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* Copyright (c) 2018 by Arista Networks
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* Author: Nikhil AP <nikhilap@arista.com>
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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 1999 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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/* Arista Vendor-Specific EtherType Protocol Identifier
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*
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* Arista applied for, and received the assignment of, a vendor-specific EtherType Protocol Identifier in May of 2016. Details below:
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*
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* Ethertype number is: D28B
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* Issue date is: May 12, 2016
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*
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* Arista Subtype 0x01 is Timestamp L2 Header
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*
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* The timestamp L2 header consist of the following fields:
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*
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* Arista EtherType (0xD28B)
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* Two-byte protocol subtype of 0x1
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* Two-byte protocol version: 0x10 for 64-bit timestamp and 0x20 for 48-bit timestamp
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* UTC timestamp value in IEEE 1588 time of day format (either 64-bit or 48-bit) with the lower 32-bits representing nanoseconds and upper bits representing seconds.
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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/etypes.h>
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#include <epan/expert.h>
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#define ARISTA_TIMESTAMP_SUBTYPE 0x01
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#define ARISTA_TIMESTAMP_V1 0x10
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#define ARISTA_TIMESTAMP_V2 0x20
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void proto_reg_handoff_avsp(void);
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void proto_register_avsp(void);
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static int proto_avsp = -1;
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/* sub trees */
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static gint ett_avsp = -1;
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static gint ett_avsp_ts_48 = -1;
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/* avsp variables */
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static int hf_avsp_sub_type = -1;
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static int hf_avsp_ts_version = -1;
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static int hf_avsp_ts_64 = -1;
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static int hf_avsp_ts_48 = -1;
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static int hf_avsp_ts_48_sec = -1;
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static int hf_avsp_ts_48_ns = -1;
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static expert_field ei_avsp_ts_unknown_version = EI_INIT;
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static const value_string arista_subtype[] = {
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{ARISTA_TIMESTAMP_SUBTYPE, "timestamp"},
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{0, NULL}
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};
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static const value_string ts_versions[] = {
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{ARISTA_TIMESTAMP_V1, "Version 1"},
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{ARISTA_TIMESTAMP_V2, "Version 2"},
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{0, NULL}
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};
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static ei_register_info ei[] = {
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{ &ei_avsp_ts_unknown_version, { "avsp.ts.unknown_version", PI_SEQUENCE, PI_WARN, "Unknown timestamp version", EXPFILL }},
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};
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static int
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dissect_avsp(tvbuff_t * tvb, packet_info * pinfo, proto_tree * tree, void *data _U_)
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{
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guint8 offset = 0;
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int version, subtype;
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/* col_set_str() function is used to set the column string */
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "AVSP");
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col_clear(pinfo->cinfo, COL_INFO);
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proto_item *ti = NULL;
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proto_tree *avsp_tree = NULL, *avsp_48_tree = NULL;
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nstime_t ts_nstime;
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/* Adding Items and Values to the Protocol Tree */
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ti = proto_tree_add_item(tree, proto_avsp, tvb, 0, -1,
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ENC_NA);
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avsp_tree = proto_item_add_subtree(ti, ett_avsp);
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/* adding each item to avsp */
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proto_tree_add_item_ret_uint(avsp_tree, hf_avsp_sub_type, tvb,
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offset, 2, ENC_BIG_ENDIAN, &subtype);
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offset += 2;
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if (subtype == ARISTA_TIMESTAMP_SUBTYPE) {
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proto_tree_add_item_ret_uint(avsp_tree, hf_avsp_ts_version, tvb, offset,
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2, ENC_BIG_ENDIAN, &version);
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offset += 2;
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switch (version) {
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case ARISTA_TIMESTAMP_V1:
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col_add_fstr(pinfo->cinfo, COL_INFO, "64bit-v1 timestamp");
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ts_nstime.secs = tvb_get_guint32(tvb, offset, ENC_BIG_ENDIAN);
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ts_nstime.nsecs = tvb_get_guint32(tvb, offset + 4, ENC_BIG_ENDIAN);
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proto_tree_add_time(avsp_tree, hf_avsp_ts_64, tvb,
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offset, 8, &ts_nstime);
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offset += 8;
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break;
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case ARISTA_TIMESTAMP_V2:
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ti = proto_tree_add_item(avsp_tree, hf_avsp_ts_48, tvb, 0, -1,
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ENC_NA);
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avsp_48_tree = proto_item_add_subtree(ti, ett_avsp);
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col_add_fstr(pinfo->cinfo, COL_INFO, "48bit-v2 timestamp");
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proto_tree_add_item(avsp_48_tree, hf_avsp_ts_48_sec, tvb, offset,
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2, ENC_BIG_ENDIAN);
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offset += 2;
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proto_tree_add_item(avsp_48_tree, hf_avsp_ts_48_ns, tvb, offset,
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4, ENC_BIG_ENDIAN);
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offset += 4;
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break;
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default:
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expert_add_info_format(pinfo, ti, &ei_avsp_ts_unknown_version,
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"Unknown timestamp version: 0x%0x", version);
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return tvb_captured_length(tvb);
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}
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}
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call_data_dissector(tvb_new_subset_remaining (tvb, offset), pinfo, tree);
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return tvb_captured_length(tvb);
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}
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void proto_reg_handoff_avsp(void)
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{
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/* the handle for the dynamic dissector */
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dissector_handle_t avsp_handle;
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avsp_handle =
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create_dissector_handle(dissect_avsp, proto_avsp);
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dissector_add_uint("ethertype", ETHERTYPE_AVSP, avsp_handle);
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}
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void proto_register_avsp(void)
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{
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/* Field Registration */
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static hf_register_info hf[] = {
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/* For avsp */
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{&hf_avsp_sub_type,
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{"Sub Type", "avsp.sub_type",
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FT_UINT16, BASE_DEC,
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VALS(arista_subtype), 0x0,
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NULL, HFILL}
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},
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{&hf_avsp_ts_version,
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{"Version", "avsp.ver",
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FT_UINT16, BASE_HEX,
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VALS(ts_versions), 0x0,
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NULL, HFILL}
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},
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{&hf_avsp_ts_64,
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{"Timestamp", "avsp.64ts",
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FT_ABSOLUTE_TIME, ABSOLUTE_TIME_UTC,
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NULL, 0x0,
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NULL, HFILL}
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},
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{&hf_avsp_ts_48,
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{"Timestamp", "avsp.48ts",
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FT_NONE, BASE_NONE,
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NULL, 0x0,
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NULL, HFILL}
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},
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{&hf_avsp_ts_48_sec,
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{"Seconds", "avsp.48sec",
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FT_UINT16, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL}
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},
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{&hf_avsp_ts_48_ns,
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{"Nano Seconds", "avsp.48ns",
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FT_UINT32, BASE_DEC,
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NULL, 0x0,
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NULL, HFILL}
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},
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};
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/* Setup protocol subtree array */
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static gint *ett[] = {
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&ett_avsp, /* main avsp tree */
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&ett_avsp_ts_48, /* subtree of above for 48 bit timestamp */
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};
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/* registering the avsp protocol with 3 names */
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proto_avsp = proto_register_protocol("Arista Vendor Specific Protocol",
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"avsp",
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"avsp"
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);
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/* Register header fields and subtrees. */
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proto_register_field_array(proto_avsp, hf, array_length(hf));
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/* To register subtree types, pass an array of pointers */
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proto_register_subtree_array(ett, array_length(ett));
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expert_register_field_array(expert_register_protocol(proto_avsp),
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ei, array_length(ei));
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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: 4
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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=4 tabstop=8 expandtab:
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* :indentSize=4:tabSize=8:noTabs=true:
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*/
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@ -178,6 +178,7 @@ const value_string etype_vals[] = {
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{ ETHERTYPE_BLUECOM, "bluecom Protocol" },
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{ ETHERTYPE_QINQ_OLD, "QinQ: old non-standard 802.1ad" },
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{ ETHERTYPE_6LOWPAN, "6LoWPAN" },
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{ ETHERTYPE_AVSP, "Arista Timestamp" },
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{ 0, NULL }
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};
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@ -613,6 +613,10 @@ extern "C" {
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#define ETHERTYPE_FCFT 0xFCFC /* used to transport FC frames+MDS hdr internal to Cisco's MDS switch */
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#endif
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#ifndef ETHERTYPE_AVSP
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#define ETHERTYPE_AVSP 0xD28B /* Ethernet type for Arista vendor specific packet frames */
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#endif
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WS_DLL_PUBLIC const value_string etype_vals[];
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#ifdef __cplusplus
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