/* packet-hsr.c * Routines for HSR dissection (IEC62439 Part 3) * Copyright 2009, Florian Reichert * * Wireshark - Network traffic analyzer * By Gerald Combs * Copyright 1998 Gerald Combs * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation; either version 2 * of the License, or (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ #include "config.h" #include #include void proto_register_hsr(void); void proto_reg_handoff_hsr(void); /**********************************************************/ /* Lengths of fields within a HSR packet. */ /**********************************************************/ #define HSR_LSDU_PATH_LENGTH 2 #define HSR_SEQUENZNR_LENGTH 2 #define HSR_TOTAL_LENGTH 4 /**********************************************************/ /* Offsets of fields within a HSR packet. */ /**********************************************************/ #define HSR_PATH_OFFSET 0 #define HSR_SEQUENZNR_OFFSET 2 static const value_string hsr_laneid_vals[] = { {0, "Lane A"}, {1, "Lane B"}, {0, NULL} }; /**********************************************************/ /* Initialize the protocol and registered fields */ /**********************************************************/ static int proto_hsr = -1; /* Initialize supervision frame fields */ static int hf_hsr_path = -1; static int hf_hsr_netid = -1; static int hf_hsr_laneid = -1; static int hf_hsr_lsdu_size = -1; static int hf_hsr_sequence_nr = -1; static int hf_type= -1; static dissector_table_t ethertype_subdissector_table; /* Initialize the subtree pointers */ static gint ett_hsr_frame = -1; /* Code to actually dissect the packets */ static int dissect_hsr_frame(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, void* data _U_) { proto_item *ti; proto_tree *hsr_tree; tvbuff_t *next_tvb; guint16 etype; guint16 lsdu_size, lsdu_size_correct; col_set_str(pinfo->cinfo, COL_PROTOCOL, "HSR"); col_set_str(pinfo->cinfo, COL_INFO, "HSR-Data Frame"); /* create display subtree for the protocol */ ti = proto_tree_add_item(tree, proto_hsr, tvb, 0, HSR_TOTAL_LENGTH, ENC_NA); hsr_tree = proto_item_add_subtree(ti, ett_hsr_frame); proto_tree_add_item(hsr_tree, hf_hsr_path, tvb, HSR_PATH_OFFSET, HSR_LSDU_PATH_LENGTH , ENC_BIG_ENDIAN); proto_tree_add_item(hsr_tree, hf_hsr_netid, tvb, HSR_PATH_OFFSET, HSR_LSDU_PATH_LENGTH , ENC_BIG_ENDIAN); proto_tree_add_item(hsr_tree, hf_hsr_laneid, tvb, HSR_PATH_OFFSET, HSR_LSDU_PATH_LENGTH , ENC_BIG_ENDIAN); lsdu_size = tvb_get_ntohs(tvb, HSR_PATH_OFFSET) & 0x0fff; lsdu_size_correct = tvb_reported_length_remaining(tvb, 0); if (lsdu_size == lsdu_size_correct) { proto_tree_add_uint_format_value(hsr_tree, hf_hsr_lsdu_size, tvb, HSR_PATH_OFFSET, HSR_LSDU_PATH_LENGTH, lsdu_size, "%d [correct]", lsdu_size); } else { proto_tree_add_uint_format_value(hsr_tree, hf_hsr_lsdu_size, tvb, HSR_PATH_OFFSET, HSR_LSDU_PATH_LENGTH, lsdu_size, "%d [WRONG, should be %d]", lsdu_size, lsdu_size_correct); } proto_tree_add_item(hsr_tree, hf_hsr_sequence_nr, tvb, HSR_SEQUENZNR_OFFSET,HSR_SEQUENZNR_LENGTH, ENC_BIG_ENDIAN); proto_tree_add_item(hsr_tree, hf_type, tvb, HSR_TOTAL_LENGTH,2, ENC_BIG_ENDIAN); next_tvb = tvb_new_subset_remaining(tvb, HSR_TOTAL_LENGTH + 2); etype = tvb_get_ntohs(tvb, HSR_TOTAL_LENGTH); if (!dissector_try_uint(ethertype_subdissector_table, etype, next_tvb, pinfo, tree)) call_data_dissector(next_tvb, pinfo, hsr_tree); return tvb_captured_length(tvb); } /* Register the protocol with Wireshark */ void proto_register_hsr(void) { static hf_register_info hf[] = { { &hf_hsr_path, { "Path", "hsr.path", FT_UINT16, BASE_DEC, NULL, 0xf000, NULL, HFILL } }, { &hf_hsr_netid, { "Network id", "hsr.netid", FT_UINT16, BASE_DEC, NULL, 0xe000, NULL, HFILL } }, { &hf_hsr_laneid, { "Lane id", "hsr.laneid", FT_UINT16, BASE_DEC, VALS(hsr_laneid_vals), 0x1000, NULL, HFILL } }, { &hf_hsr_lsdu_size, { "LSDU size", "hsr.lsdu_size", FT_UINT16, BASE_DEC, NULL, 0x0fff, NULL, HFILL } }, { &hf_hsr_sequence_nr, { "Sequence number", "hsr.sequence_nr", FT_UINT16, BASE_DEC, NULL, 0x00, NULL, HFILL } }, { &hf_type, { "Type", "hsr.type", FT_UINT16, BASE_HEX, VALS(etype_vals), 0x00, NULL, HFILL } } }; static gint *ett[] = { &ett_hsr_frame, }; /* Register the protocol name and description */ proto_hsr = proto_register_protocol("High-availability Seamless Redundancy (IEC62439 Part 3 Chapter 5)", "HSR", "hsr"); /* Required function calls to register the header fields and subtree used */ proto_register_field_array(proto_hsr, hf, array_length(hf)); proto_register_subtree_array(ett, array_length(ett)); } void proto_reg_handoff_hsr(void) { dissector_handle_t hsr_frame_handle; hsr_frame_handle = create_dissector_handle(dissect_hsr_frame, proto_hsr); dissector_add_uint("ethertype", ETHERTYPE_HSR, hsr_frame_handle); ethertype_subdissector_table = find_dissector_table("ethertype"); } /* * Editor modelines - http://www.wireshark.org/tools/modelines.html * * Local variables: * c-basic-offset: 4 * tab-width: 8 * indent-tabs-mode: nil * End: * * vi: set shiftwidth=4 tabstop=8 expandtab: * :indentSize=4:tabSize=8:noTabs=true: */