DEC LANBridge Spanning Tree Protocol support, from Paul Ionescu.

Put "packet-lapbether.c" into "Makefile.nmake".

svn path=/trunk/; revision=2828

1 files changed, 166 insertions, 0 deletions

diff --git a/packet-dec-bpdu.c b/packet-dec-bpdu.c
new file mode 100644
index 0000000000..0ce0ece8aa
--- /dev/null
+++ b/packet-dec-bpdu.c
@@ -0,0 +1,166 @@
+/* packet-dec-bpdu.c
+ * Routines for DEC BPDU (DEC Spanning Tree Protocol) disassembly
+ *
+ * $Id: packet-dec-bpdu.c,v 1.1 2001/01/05 19:00:37 guy Exp $
+ *
+ * Copyright 2001 Paul Ionescu <paul@acorp.ro>
+ * 
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@zing.org>
+ * 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 <sys/types.h>
+#endif
+
+#ifdef HAVE_NETINET_IN_H
+# include <netinet/in.h>
+#endif
+
+#include <stdio.h>
+#include <string.h>
+#include <glib.h>
+#include "packet.h"
+#include "resolv.h"
+#include "etypes.h"
+
+/* Offsets of fields within a BPDU */
+
+#define BPDU_DEC_CODE            0
+#define BPDU_TYPE                1
+#define BPDU_VERSION		 2
+#define BPDU_FLAGS               3
+#define BPDU_ROOT_PRI            4
+#define BPDU_ROOT_MAC            6
+#define BPDU_ROOT_PATH_COST     12
+#define BPDU_BRIDGE_PRI         14
+#define BPDU_BRIDGE_MAC         16
+#define BPDU_PORT_IDENTIFIER    22
+#define BPDU_MESSAGE_AGE        23
+#define BPDU_HELLO_TIME         24
+#define BPDU_MAX_AGE            25
+#define BPDU_FORWARD_DELAY      26
+
+static int proto_dec_bpdu = -1;
+
+static gint ett_dec_bpdu = -1;
+
+static void
+dissect_dec_bpdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
+      guint8  protocol_identifier;
+      guint8  protocol_version;
+      guint8  bpdu_type;
+      guint8  flags;
+      proto_tree *bpdu_tree;
+      proto_item *ti;
+
+      CHECK_DISPLAY_AS_DATA(proto_dec_bpdu, tvb, pinfo, tree);
+
+      pinfo->current_proto = "DEC_STP";
+
+      if (check_col(pinfo->fd, COL_PROTOCOL)) {
+	    col_set_str(pinfo->fd, COL_PROTOCOL, "DEC_STP");
+      }
+
+      bpdu_type = tvb_get_guint8(tvb, BPDU_TYPE);
+      flags=tvb_get_guint8(tvb,BPDU_FLAGS);
+      
+      if (check_col(pinfo->fd, COL_INFO)) {
+	    if (bpdu_type == 25)
+		  col_add_fstr(pinfo->fd, COL_INFO, "Hello Packet");
+	    else if (bpdu_type == 0x02)
+		  col_add_fstr(pinfo->fd, COL_INFO, "Topology Change Notification");
+      }
+
+      if (tree) {
+	    protocol_identifier = tvb_get_guint8(tvb, BPDU_DEC_CODE);
+
+	    protocol_version = tvb_get_guint8(tvb, BPDU_VERSION);
+
+	    ti = proto_tree_add_protocol_format(tree, proto_dec_bpdu, tvb, 0, 27,
+			    	"DEC Spanning Tree Protocol");
+	    bpdu_tree = proto_item_add_subtree(ti, ett_dec_bpdu);
+
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_DEC_CODE, 1, "Protocol ID: %d (%s)",
+	         protocol_identifier,
+	         protocol_identifier==0xe1?"DEC Spanning Tree Protocol":
+	         "Unknown protocol, the dissection may be wrong");
+
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_TYPE,1, "BPDU Type: %d (%s)", bpdu_type,
+	    	(bpdu_type==25?"Hello Packet":(bpdu_type==2?"Topology change notice":"Unknown")));
+
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_VERSION,1, "BPDU Version: %d (%s)",
+	    	protocol_version,protocol_version==1?"DEC STP Version 1":"Unknown Version");
+
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_FLAGS,1, "Flags: %d",flags);
+
+	    if (flags & 0x80)
+		  proto_tree_add_text(bpdu_tree, tvb, BPDU_FLAGS, 1, "      1... ....  Use short timers");
+	    if (flags & 0x02)
+		  proto_tree_add_text(bpdu_tree, tvb, BPDU_FLAGS, 1, "      .... ..1.  Topology Change Acknowledgment");
+	    if (flags & 0x01)
+		  proto_tree_add_text(bpdu_tree, tvb, BPDU_FLAGS, 1, "      .... ...1  Topology Change");
+	    
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_ROOT_PRI,2, "Root priority: %d",
+	    	tvb_get_ntohs(tvb,BPDU_ROOT_PRI));
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_ROOT_MAC,6, "Root MAC: %s",
+	    	ether_to_str(tvb_get_ptr(tvb,BPDU_ROOT_MAC,6)));
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_ROOT_PATH_COST,2, "Root path cost: %d",
+	    	tvb_get_ntohs(tvb,BPDU_ROOT_PATH_COST));
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_BRIDGE_PRI,2, "Root priority: %d",
+	    	tvb_get_ntohs(tvb,BPDU_BRIDGE_PRI));
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_BRIDGE_MAC,6, "Root MAC: %s",
+	    	ether_to_str(tvb_get_ptr(tvb,BPDU_BRIDGE_MAC,6)));
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_PORT_IDENTIFIER,1, "Port identifier: %d",
+	    	tvb_get_guint8(tvb,BPDU_PORT_IDENTIFIER));
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_MESSAGE_AGE,1, "Age: %d",
+	    	tvb_get_guint8(tvb,BPDU_MESSAGE_AGE));
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_HELLO_TIME,1, "Hello time: %d",
+	    	tvb_get_guint8(tvb,BPDU_HELLO_TIME));
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_MAX_AGE,1, "Max Age: %d",
+	    	tvb_get_guint8(tvb,BPDU_MAX_AGE));
+	    proto_tree_add_text(bpdu_tree, tvb, BPDU_FORWARD_DELAY,1, "Forward Delay: %d",
+	    	tvb_get_guint8(tvb,BPDU_FORWARD_DELAY));
+
+      }
+}
+
+void
+proto_register_dec_bpdu(void)
+{
+
+  static gint *ett[] = {
+    &ett_dec_bpdu,
+  };
+
+  proto_dec_bpdu = proto_register_protocol("DEC Spanning Tree Protocol", "DEC_STP", "dec_stp");
+  proto_register_subtree_array(ett, array_length(ett));
+
+  register_dissector("dec_bpdu", dissect_dec_bpdu);
+}
+
+void
+proto_reg_handoff_dec_bpdu(void)
+{
+  dissector_add("ethertype", ETHERTYPE_DEC_LB, dissect_dec_bpdu); 
+}