138 lines
4.1 KiB
C
138 lines
4.1 KiB
C
/* packet-eigrp.c
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*
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* $Id: packet-eigrp.c,v 1.4 2000/05/31 05:07:02 guy Exp $
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*
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* Ethereal - Network traffic analyzer
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* By Gerald Combs <gerald@zing.org>
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* Copyright 1998 Gerald Combs
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*
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#ifdef HAVE_SYS_TYPES_H
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# include <sys/types.h>
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#endif
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#ifdef HAVE_NETINET_IN_H
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# include <netinet/in.h>
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#endif
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#include <glib.h>
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#include "packet.h"
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#include "resolv.h"
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#include "packet-atalk.h"
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#include "packet-ip.h"
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#include "packet-ipx.h"
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/* EIGRP Structs and Definitions. */
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/* EIGRP Opcodes */
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#define EIGRP_UPDATE 0x01
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#define EIGRP_REQUEST 0x02
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#define EIGRP_QUERY 0x03
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#define EIGRP_REPLY 0x04
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#define EIGRP_HELLO 0x05
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typedef struct _e_eigrp
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{
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guint8 eigrp_version;
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guint8 eigrp_opcode;
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guint16 eigrp_checksum;
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guint16 eigrp_subnets;
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guint16 eigrp_networks;
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guint32 eigrp_sequence;
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guint32 eigrp_asnumber;
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guint8 eigrp_type1;
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guint8 eigrp_subtype1;
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guint16 eigrp_length1;
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guint16 eigrp_holdtime;
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guint8 eigrp_type2;
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guint8 eigrp_subtype2;
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guint16 eigrp_length2;
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guint8 eigrp_level;
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guint16 eigrp_dummy;
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} e_eigrp;
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static int proto_eigrp = -1;
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static gint ett_eigrp = -1;
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static const value_string eigrp_opcode_vals[] = {
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{ EIGRP_HELLO, "Hello/Ack" },
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{ EIGRP_UPDATE, "Update" },
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{ EIGRP_REPLY, "Reply" },
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{ EIGRP_QUERY, "Query" },
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{ EIGRP_REQUEST, "Request" },
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{ 0, NULL }
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};
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static void
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dissect_eigrp(const u_char *pd, int offset, frame_data *fd, proto_tree *tree) {
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e_eigrp ih;
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proto_tree *eigrp_tree;
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proto_item *ti;
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guint16 cksum;
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/* Avoids alignment problems on many architectures. */
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memcpy(&ih, &pd[offset], sizeof(e_eigrp));
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/* To do: check for runts, errs, etc. */
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cksum = ntohs(ih.eigrp_checksum);
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if (check_col(fd, COL_PROTOCOL))
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col_add_str(fd, COL_PROTOCOL, "EIGRP");
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if (check_col(fd, COL_INFO))
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col_add_str(fd, COL_INFO,
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val_to_str( ih.eigrp_opcode, eigrp_opcode_vals, "Unknown (0x%04x)"));
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if (tree) {
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ti = proto_tree_add_item(tree, proto_eigrp, NullTVB, offset, END_OF_FRAME, FALSE);
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eigrp_tree = proto_item_add_subtree(ti, ett_eigrp);
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proto_tree_add_text(eigrp_tree, NullTVB, offset, 1, "Version: %u", ih.eigrp_version);
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proto_tree_add_text(eigrp_tree, NullTVB, offset + 1, 1, "Opcode: %u (%s)", ih.eigrp_opcode,
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val_to_str( ih.eigrp_opcode, eigrp_opcode_vals, "Unknown") );
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proto_tree_add_text(eigrp_tree, NullTVB, offset + 2, 2, "Checksum: 0x%x", cksum);
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proto_tree_add_text(eigrp_tree, NullTVB, offset + 4, 2, "Subnets in local net: %u", ih.eigrp_subnets);
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proto_tree_add_text(eigrp_tree, NullTVB, offset + 6, 2, "Networks in Autonomous System: %d", ih.eigrp_networks);
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proto_tree_add_text(eigrp_tree, NullTVB, offset + 8, 4, "Sequence Number: 0x%x", ih.eigrp_sequence);
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proto_tree_add_text(eigrp_tree, NullTVB, offset + 12, 4, "Autonomous System number: %u", ih.eigrp_asnumber);
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}
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}
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void
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proto_register_eigrp(void)
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{
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static gint *ett[] = {
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&ett_eigrp,
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};
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proto_eigrp = proto_register_protocol("Enhanced Interior Gateway Routing Protocol", "eigrp");
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proto_register_subtree_array(ett, array_length(ett));
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}
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void
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proto_reg_handoff_eigrp(void)
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{
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dissector_add("ip.proto", IP_PROTO_EIGRP, dissect_eigrp);
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dissector_add("ddp.type", DDP_EIGRP, dissect_eigrp);
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dissector_add("ipx.socket", IPX_SOCKET_EIGRP, dissect_eigrp);
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}
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