--- /dev/null
+/* packet-hsrp.c
+ * Routines for the Cisco Hot Standby Router Protocol (HSRP)
+ * RFC2281
+ *
+ * Heikki Vatiainen <hessu@cs.tut.fi>
+ *
+ * $Id: packet-hsrp.c,v 1.1 1999/11/21 20:02:30 gram Exp $
+ *
+ * Ethereal - Network traffic analyzer
+ * By Gerald Combs <gerald@unicom.net>
+ * Copyright 1998 Gerald Combs
+ *
+ * Copied from packet-vrrp.c
+ *
+ * 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 <glib.h>
+#include "packet.h"
+
+static gint proto_hsrp = -1;
+static gint ett_hsrp = -1;
+
+struct hsrp_packet { /* Multicast to 224.0.0.2, TTL 1, UDP, port 1985 */
+ guint8 version; /* RFC2281 describes version 0 */
+ guint8 opcode;
+ guint8 state;
+#define HSRP_DEFAULT_HELLOTIME 3
+ guint8 hellotime; /* In seconds */
+#define HSRP_DEFAULT_HOLDTIME 10
+ guint8 holdtime; /* In seconds */
+ guint8 priority; /* Higher is stronger, highest IP address tie-breaker */
+ guint8 group; /* Identifies the standby group */
+ guint8 reserved;
+ guint8 auth_data[8]; /* Clear-text password, recommended default is `cisco' */
+ guint32 virt_ip_addr; /* The virtual IP address used by this group */
+};
+
+
+#define HSRP_OPCODE_HELLO 0
+#define HSRP_OPCODE_COUP 1
+#define HSRP_OPCODE_RESIGN 2
+static const value_string hsrp_opcode_vals[] = {
+ {HSRP_OPCODE_HELLO, "Hello"},
+ {HSRP_OPCODE_COUP, "Coup"},
+ {HSRP_OPCODE_RESIGN, "Resign"}
+};
+
+#define HSRP_STATE_INITIAL 0
+#define HSRP_STATE_LEARN 1
+#define HSRP_STATE_LISTEN 2
+#define HSRP_STATE_SPEAK 4
+#define HSRP_STATE_STANDBY 8
+#define HSRP_STATE_ACTIVE 16
+static const value_string hsrp_state_vals[] = {
+ {HSRP_STATE_INITIAL, "Initial"},
+ {HSRP_STATE_LEARN, "Learn"},
+ {HSRP_STATE_LISTEN, "Listen"},
+ {HSRP_STATE_SPEAK, "Speak"},
+ {HSRP_STATE_STANDBY, "Standby"},
+ {HSRP_STATE_ACTIVE, "Active"}
+};
+
+void dissect_hsrp(const u_char *pd, int offset, frame_data *fd, proto_tree *tree)
+{
+ struct hsrp_packet hsrp;
+ gboolean short_packet = FALSE;
+
+ if (sizeof(struct hsrp_packet) > END_OF_FRAME)
+ short_packet = TRUE;
+ else
+ memcpy(&hsrp, pd + offset, sizeof(struct hsrp_packet));
+
+ if (check_col(fd, COL_PROTOCOL))
+ col_add_str(fd, COL_PROTOCOL, "HSRP");
+
+ if (check_col(fd, COL_INFO)) {
+ if (short_packet)
+ col_add_fstr(fd, COL_INFO, "Short packet, length %u", END_OF_FRAME);
+ else
+ col_add_fstr(fd, COL_INFO, "%s (state %s)",
+ val_to_str(hsrp.opcode, hsrp_opcode_vals, "Unknown"),
+ val_to_str(hsrp.state, hsrp_state_vals, "Unknown"));
+ }
+
+ if (tree) {
+ proto_item *ti;
+ proto_tree *hsrp_tree;
+ guint8 auth_buf[sizeof(hsrp.auth_data) + 1];
+
+ if (short_packet) {
+ dissect_data(pd, offset, fd, tree);
+ return;
+ }
+
+ ti = proto_tree_add_item(tree, proto_hsrp, offset, END_OF_FRAME, NULL);
+ hsrp_tree = proto_item_add_subtree(ti, ett_hsrp);
+
+ proto_tree_add_text(hsrp_tree, offset++, 1, "Version: %u", hsrp.version);
+ proto_tree_add_text(hsrp_tree, offset++, 1, "Opcode: %u (%s)", hsrp.opcode,
+ val_to_str(hsrp.opcode, hsrp_opcode_vals, "Unknown"));
+ proto_tree_add_text(hsrp_tree, offset++, 1, "State: %u (%s)", hsrp.state,
+ val_to_str(hsrp.state, hsrp_state_vals, "Unknown"));
+
+ proto_tree_add_text(hsrp_tree, offset++, 1, "Hellotime: %u second%s (%sdefault)",
+ hsrp.hellotime, plurality(hsrp.hellotime, "", "s"),
+ (hsrp.hellotime == HSRP_DEFAULT_HELLOTIME) ? "" : "non-");
+ proto_tree_add_text(hsrp_tree, offset++, 1, "Holdtime: %u second%s (%sdefault)",
+ hsrp.holdtime, plurality(hsrp.holdtime, "", "s"),
+ (hsrp.holdtime == HSRP_DEFAULT_HOLDTIME) ? "" : "non-");
+ proto_tree_add_text(hsrp_tree, offset++, 1, "Priority: %u", hsrp.priority);
+ proto_tree_add_text(hsrp_tree, offset++, 1, "Group: %u", hsrp.group);
+ proto_tree_add_text(hsrp_tree, offset++, 1, "Reserved: 0x%x", hsrp.reserved);
+
+ memcpy(auth_buf, hsrp.auth_data, sizeof(hsrp.auth_data));
+ auth_buf[sizeof(auth_buf)] = '\0';
+ proto_tree_add_text(hsrp_tree, offset, 8, "Authentication Data: `%s'", auth_buf);
+ offset+=8;
+
+ proto_tree_add_text(hsrp_tree, offset++, 4, "Virtual IP address: %s",
+ ip_to_str((guint8 *)&hsrp.virt_ip_addr));
+
+ }
+
+ return;
+}
+
+void proto_register_hsrp(void)
+{
+ static gint *ett[] = {
+ &ett_hsrp,
+ };
+
+ proto_hsrp = proto_register_protocol("Cisco Hot Standby Router Protocol", "hsrp");
+ proto_register_subtree_array(ett, array_length(ett));
+
+ return;
+}
git.samba.org / metze / wireshark / wip.git / commitdiff