/* packet-pn-mrp.c * Routines for PN-MRP (PROFINET Media Redundancy Protocol) * packet dissection. * * $Id$ * * 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #ifdef HAVE_SYS_TYPES_H #include #endif #include #include #include #include #include #include "packet-pn.h" static int proto_pn_mrp = -1; static int hf_pn_mrp_type = -1; static int hf_pn_mrp_length = -1; static int hf_pn_mrp_version = -1; static int hf_pn_mrp_sequence_id = -1; static int hf_pn_mrp_sa = -1; static int hf_pn_mrp_prio = -1; static int hf_pn_mrp_port_role = -1; static int hf_pn_mrp_ring_state = -1; static int hf_pn_mrp_interval = -1; static int hf_pn_mrp_transition = -1; static int hf_pn_mrp_time_stamp = -1; static int hf_pn_mrp_blocked = -1; static int hf_pn_mrp_manufacturer_oui = -1; static int hf_pn_mrp_domain_uuid = -1; static int hf_pn_mrp_oui = -1; static gint ett_pn_mrp = -1; static const value_string pn_mrp_block_type_vals[] = { { 0x00, "End" }, { 0x01, "Common" }, { 0x02, "Test" }, { 0x03, "TopologyChange" }, { 0x04, "LinkDown" }, { 0x05, "LinkUp" }, /*0x06 - 0x7E Reserved */ { 0x7F, "Organizationally Specific"}, { 0, NULL }, }; static const value_string pn_mrp_oui_vals[] = { { OUI_PROFINET, "PROFINET" }, { OUI_SIEMENS, "SIEMENS" }, { 0, NULL } }; static const value_string pn_mrp_port_role_vals[] = { { 0x0000, "Primary ring port" }, { 0x0001, "Secondary ring port"}, /*0x0002 - 0xFFFF Reserved */ { 0, NULL } }; static const value_string pn_mrp_ring_state_vals[] = { { 0x0000, "Ring open" }, { 0x0001, "Ring closed"}, /*0x0002 - 0xFFFF Reserved */ { 0, NULL } }; static const value_string pn_mrp_prio_vals[] = { { 0x8000, "Default priority for redundancy manager" }, { 0, NULL } }; static int dissect_PNMRP_Common(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, proto_item *item) { guint16 sequence_id; e_uuid_t uuid; /* MRP_SequenceID */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_sequence_id, &sequence_id); /* MRP_DomainUUID */ offset = dissect_pn_uuid(tvb, offset, pinfo, tree, hf_pn_mrp_domain_uuid, &uuid); col_append_str(pinfo->cinfo, COL_INFO, "Common"); proto_item_append_text(item, "Common"); return offset; } static int dissect_PNMRP_LinkUp(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, proto_item *item) { guint16 port_role; guint16 interval; guint16 blocked; /* MRP_PortRole */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_port_role, &port_role); /* MRP_Interval */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_interval, &interval); /* MRP_Blocked */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_blocked, &blocked); /* Padding */ offset = dissect_pn_align4(tvb, offset, pinfo, tree); col_append_str(pinfo->cinfo, COL_INFO, "LinkUp"); proto_item_append_text(item, "LinkUp"); return offset; } static int dissect_PNMRP_LinkDown(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, proto_item *item) { guint16 port_role; guint16 interval; guint16 blocked; /* MRP_PortRole */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_port_role, &port_role); /* MRP_Interval */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_interval, &interval); /* MRP_Blocked */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_blocked, &blocked); /* Padding */ offset = dissect_pn_align4(tvb, offset, pinfo, tree); col_append_str(pinfo->cinfo, COL_INFO, "LinkDown"); proto_item_append_text(item, "LinkDown"); return offset; } static int dissect_PNMRP_Test(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, proto_item *item) { guint16 prio; guint8 mac[6]; guint16 port_role; guint16 ring_state; guint16 transition; guint16 time_stamp; /* MRP_Prio */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_prio, &prio); /* MRP_SA */ offset = dissect_pn_mac(tvb, offset, pinfo, tree, hf_pn_mrp_sa, mac); /* MRP_PortRole */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_port_role, &port_role); /* MRP_RingState */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_ring_state, &ring_state); /* MRP_Transition */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_transition, &transition); /* MRP_TimeStamp */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_time_stamp, &time_stamp); /* Padding */ offset = dissect_pn_align4(tvb, offset, pinfo, tree); col_append_str(pinfo->cinfo, COL_INFO, "Test"); proto_item_append_text(item, "Test"); return offset; } static int dissect_PNMRP_TopologyChange(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, proto_item *item) { guint16 prio; guint8 mac[6]; guint16 interval; /* MRP_Prio */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_prio, &prio); /* MRP_SA */ offset = dissect_pn_mac(tvb, offset, pinfo, tree, hf_pn_mrp_sa, mac); /* MRP_Interval */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_interval, &interval); /* Padding */ /*offset = dissect_pn_align4(tvb, offset, pinfo, tree);*/ col_append_str(pinfo->cinfo, COL_INFO, "TopologyChange"); proto_item_append_text(item, "TopologyChange"); return offset; } static int dissect_PNMRP_Option(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, proto_item *item, guint8 length) { guint32 oui; /* OUI (organizational unique id) */ offset = dissect_pn_oid(tvb, offset, pinfo,tree, hf_pn_mrp_oui, &oui); length -= 3; switch (oui) { case OUI_SIEMENS: proto_item_append_text(item, "Option(SIEMENS)"); /* Padding */ if (offset % 4) { length -= 4 - (offset % 4); offset = dissect_pn_align4(tvb, offset, pinfo, tree); } if(length != 0) { offset = dissect_pn_undecoded(tvb, offset, pinfo, tree, length); } col_append_str(pinfo->cinfo, COL_INFO, "Option(Siemens)"); break; default: proto_item_append_text(item, "Option(Unknown-OUI)"); offset = dissect_pn_undecoded(tvb, offset, pinfo, tree, length); col_append_str(pinfo->cinfo, COL_INFO, "Option"); } offset += length; /* Padding */ offset = dissect_pn_align4(tvb, offset, pinfo, tree); return offset; } static int dissect_PNMRP_PDU(tvbuff_t *tvb, int offset, packet_info *pinfo, proto_tree *tree, proto_item *item) { guint16 version; guint8 type; guint8 length; gint i; tvbuff_t *new_tvb; /* MRP_Version */ offset = dissect_pn_uint16(tvb, offset, pinfo, tree, hf_pn_mrp_version, &version); /* the rest of the packet has 4byte alignment regarding to the beginning of the next TLV block! */ /* XXX - do we have to free this new tvb below? */ new_tvb = tvb_new_subset_remaining(tvb, offset); offset = 0; for(i=0; tvb_length_remaining(tvb, offset) > 0; i++) { /* MRP_TLVHeader.Type */ offset = dissect_pn_uint8(new_tvb, offset, pinfo, tree, hf_pn_mrp_type, &type); /* MRP_TLVHeader.Length */ offset = dissect_pn_uint8(new_tvb, offset, pinfo, tree, hf_pn_mrp_length, &length); if(i != 0) { col_append_str(pinfo->cinfo, COL_INFO, ", "); proto_item_append_text(item, ", "); } switch(type) { case(0x00): /* no content */ col_append_str(pinfo->cinfo, COL_INFO, "End"); proto_item_append_text(item, "End"); return offset; break; case(0x01): offset = dissect_PNMRP_Common(new_tvb, offset, pinfo, tree, item); break; case(0x02): offset = dissect_PNMRP_Test(new_tvb, offset, pinfo, tree, item); break; case(0x03): offset = dissect_PNMRP_TopologyChange(new_tvb, offset, pinfo, tree, item); break; case(0x04): offset = dissect_PNMRP_LinkDown(new_tvb, offset, pinfo, tree, item); break; case(0x05): offset = dissect_PNMRP_LinkUp(new_tvb, offset, pinfo, tree, item); break; case(0x7f): offset = dissect_PNMRP_Option(new_tvb, offset, pinfo, tree, item, length); break; default: offset = dissect_pn_undecoded(tvb, offset, pinfo, tree, length); col_append_fstr(pinfo->cinfo, COL_INFO, "Unknown TLVType 0x%x", type); proto_item_append_text(item, "Unknown TLVType 0x%x", type); } } return offset; } /* Dissect MRP packets */ static void dissect_PNMRP(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) { proto_item *ti = NULL; proto_tree *mrp_tree = NULL; guint32 offset = 0; col_set_str(pinfo->cinfo, COL_PROTOCOL, "PN-MRP"); /* Clear the information column on summary display */ col_clear(pinfo->cinfo, COL_INFO); if (tree) { ti = proto_tree_add_item(tree, proto_pn_mrp, tvb, offset, -1, FALSE); mrp_tree = proto_item_add_subtree(ti, ett_pn_mrp); } dissect_PNMRP_PDU(tvb, offset, pinfo, mrp_tree, ti); } void proto_register_pn_mrp (void) { static hf_register_info hf[] = { { &hf_pn_mrp_type, { "Type", "pn_mrp.type", FT_UINT8, BASE_HEX, VALS(pn_mrp_block_type_vals), 0x0, NULL, HFILL }}, { &hf_pn_mrp_length, { "Length", "pn_mrp.length", FT_UINT8, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_pn_mrp_version, { "Version", "pn_mrp.version", FT_UINT16, BASE_DEC, NULL, 0x0, NULL, HFILL }}, { &hf_pn_mrp_sequence_id, { "SequenceID", "pn_mrp.sequence_id", FT_UINT16, BASE_HEX, NULL, 0x0, "Unique sequence number to each outstanding service request", HFILL }}, { &hf_pn_mrp_sa, { "SA", "pn_mrp.sa", FT_ETHER, BASE_NONE, 0x0, 0x0, NULL, HFILL }}, { &hf_pn_mrp_prio, { "Prio", "pn_mrp.prio", FT_UINT16, BASE_HEX, VALS(pn_mrp_prio_vals), 0x0, NULL, HFILL }}, { &hf_pn_mrp_port_role, { "PortRole", "pn_mrp.port_role", FT_UINT16, BASE_HEX, VALS(pn_mrp_port_role_vals), 0x0, NULL, HFILL }}, { &hf_pn_mrp_ring_state, { "RingState", "pn_mrp.ring_state", FT_UINT16, BASE_HEX, VALS(pn_mrp_ring_state_vals), 0x0, NULL, HFILL }}, { &hf_pn_mrp_interval, { "Interval", "pn_mrp.interval", FT_UINT16, BASE_DEC, NULL, 0x0, "Interval for next topologie change event (in ms)", HFILL }}, { &hf_pn_mrp_transition, { "Transition", "pn_mrp.transition", FT_UINT16, BASE_HEX, NULL, 0x0, "Number of transitions between media redundancy lost and ok states", HFILL }}, { &hf_pn_mrp_time_stamp, { "TimeStamp", "pn_mrp.time_stamp", FT_UINT16, BASE_HEX, NULL, 0x0, "Actual counter value of 1ms counter", HFILL }}, { &hf_pn_mrp_blocked, { "Blocked", "pn_mrp.blocked", FT_UINT16, BASE_HEX, NULL, 0x0, NULL, HFILL }}, { &hf_pn_mrp_manufacturer_oui, { "ManufacturerOUI", "pn_mrp.manufacturer_oui", FT_UINT24, BASE_HEX, VALS(pn_mrp_oui_vals), 0x0, NULL, HFILL }}, { &hf_pn_mrp_domain_uuid, { "DomainUUID", "pn_mrp.domain_uuid", FT_GUID, BASE_NONE, NULL, 0x0, NULL, HFILL }}, { &hf_pn_mrp_oui, { "Organizationally Unique Identifier", "pn_mrp.oui", FT_UINT24, BASE_HEX, VALS(pn_mrp_oui_vals), 0x0, NULL, HFILL }}, }; static gint *ett[] = { &ett_pn_mrp }; proto_pn_mrp = proto_register_protocol ("PROFINET MRP", "PN-MRP", "pn_mrp"); proto_register_field_array (proto_pn_mrp, hf, array_length (hf)); proto_register_subtree_array (ett, array_length (ett)); } void proto_reg_handoff_pn_mrp (void) { dissector_handle_t mrp_handle; mrp_handle = create_dissector_handle(dissect_PNMRP,proto_pn_mrp); dissector_add("ethertype", ETHERTYPE_MRP, mrp_handle); }