From 669db206cb1f270046ad400fff7655e20c63e723 Mon Sep 17 00:00:00 2001 From: Gilbert Ramirez Date: Sun, 18 Jul 2004 18:06:47 +0000 Subject: Move dissectors to epan/dissectors directory. Also move ncp222.py, x11-fields, process-x11-fields.pl, make-reg-dotc, and make-reg-dotc.py. Adjust #include lines in files that include packet-*.h files. svn path=/trunk/; revision=11410 --- epan/dissectors/packet-gmrp.c | 399 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 399 insertions(+) create mode 100644 epan/dissectors/packet-gmrp.c (limited to 'epan/dissectors/packet-gmrp.c') diff --git a/epan/dissectors/packet-gmrp.c b/epan/dissectors/packet-gmrp.c new file mode 100644 index 0000000000..872eb92a08 --- /dev/null +++ b/epan/dissectors/packet-gmrp.c @@ -0,0 +1,399 @@ +/* packet-gmrp.c + * Routines for GMRP (GARP Multicast Registration Protocol) dissection + * Copyright 2001, Markus Seehofer + * + * Based on the code from packet-gvrp.c (GVRP) from + * Kevin Shi Copyright 2000 + * + * $Id$ + * + * Ethereal - 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 + +#include +#include +#include + +#include + +#include +#include "llcsaps.h" + +/* Initialize the protocol and registered fields */ +static int proto_gmrp = -1; +static int hf_gmrp_proto_id = -1; +static int hf_gmrp_attribute_type = -1; +static int hf_gmrp_attribute_length = -1; +static int hf_gmrp_attribute_event = -1; +static int hf_gmrp_attribute_value_group_membership = -1; +static int hf_gmrp_attribute_value_service_requirement = -1; +/*static int hf_gmrp_end_of_mark = -1;*/ + +/* Initialize the subtree pointers */ +static gint ett_gmrp = -1; +/*static gint ett_gmrp_message = -1; +static gint ett_gmrp_attribute_list = -1; +static gint ett_gmrp_attribute = -1;*/ + +static dissector_handle_t data_handle; + +/* Constant definitions */ +#define GARP_DEFAULT_PROTOCOL_ID 0x0001 +#define GARP_END_OF_MARK 0x00 + +#define GMRP_ATTRIBUTE_TYPE_GROUP_MEMBERSHIP 0x01 +#define GMRP_ATTRIBUTE_TYPE_SERVICE_REQUIREMENT 0x02 + +#define GMRP_SERVICE_REQUIREMENT_FORWARD_ALL 0x00 +#define GMRP_SERVICE_REQUIREMENT_FORWARD_ALL_UNREGISTERED 0x01 + +static const value_string attribute_type_vals[] = { + { GMRP_ATTRIBUTE_TYPE_GROUP_MEMBERSHIP ,"Group Membership" }, + { GMRP_ATTRIBUTE_TYPE_SERVICE_REQUIREMENT ,"Service Requirement" }, + { 0, NULL } +}; + +/* The length of GMRP LeaveAll attribute should be 2 octets (one for length + * and the other for event) */ +#define GMRP_LENGTH_LEAVEALL (sizeof(guint8)+sizeof(guint8)) + +/* The length of GMRP attribute other than LeaveAll should be: +* +* 8 bytes for Group Membership (1 for length, 1 for event and 6 for mac address to register) +* or +* 3 bytes for Service Requirement (1 for length, 1 for event, 1 for attribute value) +* + */ +#define GMRP_GROUP_MEMBERSHIP_NON_LEAVEALL (sizeof(guint8)+sizeof(guint8)+(6*sizeof(guint8))) +#define GMRP_SERVICE_REQUIREMENT_NON_LEAVEALL (sizeof(guint8)+sizeof(guint8)+sizeof(guint8)) + +/* Packet offset definitions */ +#define GARP_PROTOCOL_ID 0 + +/* Event definitions */ +#define GMRP_EVENT_LEAVEALL 0 +#define GMRP_EVENT_JOINEMPTY 1 +#define GMRP_EVENT_JOININ 2 +#define GMRP_EVENT_LEAVEEMPTY 3 +#define GMRP_EVENT_LEAVEIN 4 +#define GMRP_EVENT_EMPTY 5 + +static const value_string event_vals[] = { + { GMRP_EVENT_LEAVEALL, "Leave All" }, + { GMRP_EVENT_JOINEMPTY, "Join Empty" }, + { GMRP_EVENT_JOININ, "Join In" }, + { GMRP_EVENT_LEAVEEMPTY, "Leave Empty" }, + { GMRP_EVENT_LEAVEIN, "Leave In" }, + { GMRP_EVENT_EMPTY, "Empty" }, + { 0, NULL } +}; + + +/* Code to actually dissect the packets */ +static void +dissect_gmrp(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) +{ + proto_item *ti; + proto_tree *gmrp_tree; + guint16 protocol_id; + guint8 octet; + guint8 attribute_type; + int msg_index, attr_index, offset = 0, length = tvb_reported_length(tvb); + + if (check_col(pinfo->cinfo, COL_PROTOCOL)) + col_set_str(pinfo->cinfo, COL_PROTOCOL, "GMRP"); + + if (check_col(pinfo->cinfo, COL_INFO)) + col_set_str(pinfo->cinfo, COL_INFO, "GMRP"); + + if (tree) + { + ti = proto_tree_add_item(tree, proto_gmrp, tvb, 0, length, FALSE); + + gmrp_tree = proto_item_add_subtree(ti, ett_gmrp); + + /* Read in GARP protocol ID */ + protocol_id = tvb_get_ntohs(tvb, GARP_PROTOCOL_ID); + + proto_tree_add_uint_format(gmrp_tree, hf_gmrp_proto_id, tvb, + GARP_PROTOCOL_ID, sizeof(guint16), + protocol_id, + "Protocol Identifier: 0x%04x (%s)", + protocol_id, + protocol_id == GARP_DEFAULT_PROTOCOL_ID ? + "GARP Multicast Registration Protocol" : + "Unknown Protocol"); + + /* Currently only one protocol ID is supported */ + if (protocol_id != GARP_DEFAULT_PROTOCOL_ID) + { + proto_tree_add_text(gmrp_tree, tvb, GARP_PROTOCOL_ID, sizeof(guint16), + " (Warning: this version of Ethereal only knows about protocol id = 1)"); + call_dissector(data_handle, + tvb_new_subset(tvb, GARP_PROTOCOL_ID + sizeof(guint16), -1, -1), + pinfo, tree); + return; + } + + offset += sizeof(guint16); + length -= sizeof(guint16); + + msg_index = 0; + + /* Begin to parse GARP messages */ + while (length) + { + proto_item *msg_item; + int msg_start = offset; + + /* Read in attribute type. */ + attribute_type = octet = tvb_get_guint8(tvb, offset); + + /* Check for end of mark */ + if (octet == GARP_END_OF_MARK) + { + /* End of GARP PDU */ + if (msg_index) + { + proto_tree_add_text(gmrp_tree, tvb, offset, sizeof(guint8), + "End of pdu"); + break; + } + else + { + call_dissector(data_handle, + tvb_new_subset(tvb, offset, -1, -1), + pinfo, tree); + return; + } + } + + offset += sizeof(guint8); + length -= sizeof(guint8); + + msg_item = proto_tree_add_text(gmrp_tree, tvb, msg_start, -1, + "Message %d", msg_index + 1); + + proto_tree_add_uint(gmrp_tree, hf_gmrp_attribute_type, tvb, + msg_start, sizeof(guint8), octet); + + /* GMRP supports Group Membership and Service Requirement as attribute types */ + if ( (octet != GMRP_ATTRIBUTE_TYPE_GROUP_MEMBERSHIP) && (octet != GMRP_ATTRIBUTE_TYPE_SERVICE_REQUIREMENT) ) + { + call_dissector(data_handle, + tvb_new_subset(tvb, offset, -1, -1), pinfo, + tree); + return; + } + + attr_index = 0; + + while (length) + { + int attr_start = offset; + proto_item *attr_item; + + /* Read in attribute length. */ + octet = tvb_get_guint8(tvb, offset); + + /* Check for end of mark */ + if (octet == GARP_END_OF_MARK) + { + /* If at least one message has been already read, + * check for another end of mark. + */ + if (attr_index) + { + proto_tree_add_text(gmrp_tree, tvb, offset, + sizeof(guint8), " End of mark"); + + offset += sizeof(guint8); + length -= sizeof(guint8); + + proto_item_set_len(msg_item, offset - msg_start); + break; + } + else + { + call_dissector(data_handle, + tvb_new_subset(tvb, offset, -1, -1), + pinfo, tree); + return; + } + } + else + { + guint8 event; + + offset += sizeof(guint8); + length -= sizeof(guint8); + + attr_item = proto_tree_add_text(gmrp_tree, tvb, + attr_start, -1, " Attribute %d", attr_index + 1); + + proto_tree_add_uint(gmrp_tree, hf_gmrp_attribute_length, + tvb, attr_start, sizeof(guint8), octet); + + /* Read in attribute event */ + event = tvb_get_guint8(tvb, offset); + + proto_tree_add_uint(gmrp_tree, hf_gmrp_attribute_event, + tvb, offset, sizeof(guint8), event); + + offset += sizeof(guint8); + length -= sizeof(guint8); + + switch (event) { + + case GMRP_EVENT_LEAVEALL: + if (octet != GMRP_LENGTH_LEAVEALL) + { + call_dissector(data_handle, + tvb_new_subset(tvb, offset, -1, -1), + pinfo, tree); + return; + } + break; + + case GMRP_EVENT_JOINEMPTY: + case GMRP_EVENT_JOININ: + case GMRP_EVENT_LEAVEEMPTY: + case GMRP_EVENT_LEAVEIN: + case GMRP_EVENT_EMPTY: + if ( (octet != GMRP_GROUP_MEMBERSHIP_NON_LEAVEALL) && (octet != GMRP_SERVICE_REQUIREMENT_NON_LEAVEALL) ) + { + call_dissector(data_handle, + tvb_new_subset(tvb, offset, -1, -1), + pinfo, tree); + return; + } + + /* Show attribute value */ + + if ( GMRP_ATTRIBUTE_TYPE_GROUP_MEMBERSHIP == attribute_type ) + { + /* Group Membership */ + proto_tree_add_item(gmrp_tree, hf_gmrp_attribute_value_group_membership, + tvb, offset, (6*sizeof(guint8)), FALSE); + + offset += 6*sizeof(guint8); + length -= 6*sizeof(guint8); + } + else + if ( GMRP_ATTRIBUTE_TYPE_SERVICE_REQUIREMENT == attribute_type ) + { + /* Service Requirement */ + proto_tree_add_item(gmrp_tree, hf_gmrp_attribute_value_service_requirement, + tvb, offset, sizeof(guint8), FALSE); + + offset += sizeof(guint8); + length -= sizeof(guint8); + } + else + { + call_dissector(data_handle, + tvb_new_subset(tvb, offset, -1, -1), + pinfo, tree); + return; + } + + break; + + default: + call_dissector(data_handle, + tvb_new_subset(tvb, offset, -1, -1), + pinfo, tree); + return; + } + } + + proto_item_set_len(attr_item, offset - attr_start); + + attr_index++; + } + + msg_index++; + } + } +} + + + +/* Register the protocol with Ethereal */ +void +proto_register_gmrp(void) +{ + static hf_register_info hf[] = { + { &hf_gmrp_proto_id, + { "Protocol ID", "garp.protocol_id", + FT_UINT16, BASE_HEX, NULL, 0x0, + "" , HFILL } + }, + { &hf_gmrp_attribute_type, + { "Type", "garp.attribute_type", + FT_UINT8, BASE_HEX, VALS(attribute_type_vals), 0x0, + "" , HFILL } + }, + { &hf_gmrp_attribute_length, + { "Length", "garp.attribute_length", + FT_UINT8, BASE_DEC, NULL, 0x0, + "" , HFILL } + }, + { &hf_gmrp_attribute_event, + { "Event", "garp.attribute_event", + FT_UINT8, BASE_DEC, VALS(event_vals), 0x0, + "" , HFILL } + }, + { &hf_gmrp_attribute_value_group_membership, + { "Value", "garp.attribute_value_group_membership", + FT_ETHER, BASE_HEX, NULL, 0x0, + "" , HFILL } + }, + { &hf_gmrp_attribute_value_service_requirement, + { "Value", "garp.attribute_value_service_requirement", + FT_UINT8, BASE_HEX, NULL, 0x0, + "" , HFILL } + } + + }; + + static gint *ett[] = { + &ett_gmrp + }; + + /* Register the protocol name and description for GMRP */ + proto_gmrp = proto_register_protocol("GARP Multicast Registration Protocol", "GMRP", "gmrp"); + + /* Required function calls to register the header fields and subtrees + * used by GMRP */ + proto_register_field_array(proto_gmrp, hf, array_length(hf)); + proto_register_subtree_array(ett, array_length(ett)); + + register_dissector("gmrp", dissect_gmrp, proto_gmrp); + +} + +void +proto_reg_handoff_gmrp(void){ + data_handle = find_dissector("data"); +} -- cgit v1.2.3