forked from osmocom/wireshark
![Dario Lombardo](/assets/img/avatar_default.png)
Change-Id: I92c94448e6641716d03158a5f332c8b53709423a Reviewed-on: https://code.wireshark.org/review/25756 Petri-Dish: Dario Lombardo <lomato@gmail.com> Reviewed-by: Anders Broman <a.broman58@gmail.com>
260 lines
9.5 KiB
C
260 lines
9.5 KiB
C
/* packet-hsr-prp-supervision.c
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* Routines for HSR/PRP supervision dissection (IEC62439 Part 3)
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* Copyright 2009, Florian Reichert <refl[AT]zhaw.ch>
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* Copyright 2011, Martin Renold <reld[AT]zhaw.ch>
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*
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* Wireshark - Network traffic analyzer
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* By Gerald Combs <gerald[AT]wireshark.org>
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* Copyright 1998 Gerald Combs
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#include "config.h"
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#include <epan/packet.h>
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#include <epan/etypes.h>
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void proto_register_hsr_prp_supervision(void);
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void proto_reg_handoff_hsr_prp_supervision(void);
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/**********************************************************/
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/* Channel values for the supervision type field */
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/**********************************************************/
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static const value_string type_vals[] = {
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{20, "PRP Node (Duplicate Discard)"},
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{21, "PRP Node (Duplicate Accept)"},
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{22, "Obsolete TLV value"},
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{23, "HSR Node"},
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{30, "Redundancy Box MAC Address"},
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{31, "Virtual Dual Attached Node"},
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{0, "End of TLVs"},
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{0, NULL}
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};
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/**********************************************************/
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/* Initialize the protocol and registered fields */
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/**********************************************************/
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static int proto_hsr_prp_supervision = -1;
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/* Initialize supervision frame fields */
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static int hf_hsr_prp_supervision_path = -1;
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static int hf_hsr_prp_supervision_version = -1;
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static int hf_hsr_prp_supervision_seqno = -1;
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static int hf_hsr_prp_supervision_tlv_type = -1;
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static int hf_hsr_prp_supervision_tlv_length = -1;
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static int hf_hsr_prp_supervision_source_mac_address_A = -1;
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static int hf_hsr_prp_supervision_source_mac_address_B = -1;
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static int hf_hsr_prp_supervision_source_mac_address = -1;
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static int hf_hsr_prp_supervision_red_box_mac_address = -1;
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static int hf_hsr_prp_supervision_vdan_mac_address = -1;
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/* Initialize the subtree pointers */
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static gint ett_hsr_prp_supervision = -1;
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/* Code to actually dissect the packets */
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static int
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dissect_hsr_prp_supervision(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_)
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{
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proto_item *ti;
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proto_tree *hsr_prp_supervision_tree;
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guint8 tlv_type;
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guint8 tlv_length;
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guint16 sup_version;
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int offset;
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col_set_str(pinfo->cinfo, COL_PROTOCOL, "HSR/PRP");
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/* may get modified later while parsing */
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col_set_str(pinfo->cinfo, COL_INFO, "HSR or PRP Supervision");
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/* create display subtree for the protocol */
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ti = proto_tree_add_item(tree, proto_hsr_prp_supervision, tvb, 0, -1, ENC_NA);
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hsr_prp_supervision_tree = proto_item_add_subtree(ti, ett_hsr_prp_supervision);
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offset = 0;
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/* SupVersion */
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proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_path,
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tvb, offset, 2, ENC_BIG_ENDIAN);
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proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_version,
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tvb, offset, 2, ENC_BIG_ENDIAN);
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sup_version = tvb_get_ntohs(tvb, 0) & 0x0fff;
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offset += 2;
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if (sup_version > 0) {
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/* SupSequenceNumber */
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proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_seqno,
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tvb, offset, 2, ENC_BIG_ENDIAN);
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offset += 2;
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}
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while (tvb_reported_length_remaining(tvb, offset) > 0) {
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/* TLV.type */
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tlv_type = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_tlv_type,
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tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* TLV.length */
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tlv_length = tvb_get_guint8(tvb, offset);
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proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_tlv_length,
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tvb, offset, 1, ENC_BIG_ENDIAN);
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offset += 1;
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/* TLV.value */
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if ((tlv_type == 20 || tlv_type == 21 || tlv_type == 23) && (tlv_length == 6 || tlv_length == 12)) {
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if (tlv_type == 23) {
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col_set_str(pinfo->cinfo, COL_INFO, "HSR Supervision");
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} else {
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col_set_str(pinfo->cinfo, COL_INFO, "PRP Supervision");
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}
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if (tlv_length == 12) {
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/* MacAddressA, MacAddressB (PRP only) */
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proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_source_mac_address_A,
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tvb, offset, 6, ENC_NA);
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proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_source_mac_address_B,
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tvb, offset+6, 6, ENC_NA);
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/* PRP-0 supervision: if the node is not a RedBox, we have
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just read the last TLV. The next two octets are
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required to be zero by PRP-0. We will dissect those as
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"end of list" and break. */
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} else {
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/* MacAddress */
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proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_source_mac_address,
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tvb, offset, 6, ENC_NA);
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}
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} else if (tlv_type == 30 && tlv_length == 6) {
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/* RedBoxMacAddress */
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proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_red_box_mac_address,
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tvb, offset, 6, ENC_NA);
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if (sup_version == 0) {
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/* PRP-0 supervision: end of TLV data. Stop now, don't
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interpret the padding. */
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offset += tlv_length;
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break;
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}
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} else if (tlv_type == 31 && tlv_length == 6) {
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/* VdanMacAddress */
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proto_tree_add_item(hsr_prp_supervision_tree, hf_hsr_prp_supervision_vdan_mac_address,
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tvb, offset, 6, ENC_NA);
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if (sup_version == 0) {
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/* PRP-0 supervision: end of TLV data, padding starts */
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offset += tlv_length;
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break;
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}
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} else if (tlv_type == 0) {
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/* End of TLV list. */
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offset += tlv_length;
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break;
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} else {
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/* unknown TLV.type, or unexpected TLV.length */
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}
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offset += tlv_length;
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}
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proto_item_set_len(ti, offset);
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/* Adjust the length of this tvbuff to include only the supervision data.
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This allows the rest to be marked as padding. */
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tvb_set_reported_length(tvb, offset);
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return tvb_captured_length(tvb);
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}
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/* Register the protocol with Wireshark */
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void proto_register_hsr_prp_supervision(void)
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{
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static hf_register_info hf[] = {
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{ &hf_hsr_prp_supervision_path,
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{ "Path", "hsr_prp_supervision.path",
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FT_UINT16, BASE_DEC, NULL, 0xf000,
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NULL, HFILL }
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},
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{ &hf_hsr_prp_supervision_version,
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{ "Version", "hsr_prp_supervision.version",
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FT_UINT16, BASE_DEC, NULL, 0x0fff,
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NULL, HFILL }
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},
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{ &hf_hsr_prp_supervision_seqno,
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{ "Sequence number", "hsr_prp_supervision.supervision_seqno",
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FT_UINT16, BASE_DEC, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_hsr_prp_supervision_tlv_type,
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{ "TLV type", "hsr_prp_supervision.tlv.type",
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FT_UINT8, BASE_DEC, VALS(type_vals), 0x00,
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NULL, HFILL }
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},
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{ &hf_hsr_prp_supervision_tlv_length,
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{ "TLV length", "hsr_prp_supervision.tlv.length",
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FT_UINT8, BASE_DEC, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_hsr_prp_supervision_source_mac_address_A,
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{ "Source MAC Address A", "hsr_prp_supervision.source_mac_address_A",
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FT_ETHER, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_hsr_prp_supervision_source_mac_address_B,
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{ "Source MAC Address B", "hsr_prp_supervision.source_mac_address_B",
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FT_ETHER, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_hsr_prp_supervision_source_mac_address,
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{ "Source MAC Address", "hsr_prp_supervision.source_mac_address",
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FT_ETHER, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_hsr_prp_supervision_red_box_mac_address,
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{ "RedBox MAC Address", "hsr_prp_supervision.red_box_mac_address",
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FT_ETHER, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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},
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{ &hf_hsr_prp_supervision_vdan_mac_address,
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{ "VDAN MAC Address", "hsr_prp_supervision.vdan_mac_address",
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FT_ETHER, BASE_NONE, NULL, 0x00,
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NULL, HFILL }
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}
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};
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static gint *ett[] = {
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&ett_hsr_prp_supervision
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};
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/* Register the protocol name and description */
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proto_hsr_prp_supervision = proto_register_protocol("HSR/PRP Supervision (IEC62439 Part 3)",
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"HSR_PRP_SUPERVISION", "hsr_prp_supervision");
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/* Required function calls to register the header fields and subtree used */
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proto_register_field_array(proto_hsr_prp_supervision, hf, array_length(hf));
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proto_register_subtree_array(ett, array_length(ett));
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}
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void proto_reg_handoff_hsr_prp_supervision(void)
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{
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dissector_handle_t hsr_prp_supervision_handle;
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hsr_prp_supervision_handle = create_dissector_handle(dissect_hsr_prp_supervision, proto_hsr_prp_supervision);
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dissector_add_uint("ethertype", ETHERTYPE_PRP, hsr_prp_supervision_handle);
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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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