/* packet-bpdu.c
* Routines for BPDU (Spanning Tree Protocol) disassembly
*
- * $Id: packet-bpdu.c,v 1.19 2001/01/09 06:31:34 guy Exp $
+ * $Id: packet-bpdu.c,v 1.45 2003/01/11 10:16:22 guy Exp $
*
* Copyright 1999 Christophe Tronche <ch.tronche@computer.org>
- *
+ *
* Ethereal - Network traffic analyzer
- * By Gerald Combs <gerald@zing.org>
+ * By Gerald Combs <gerald@ethereal.com>
* 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.
# 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 <epan/packet.h>
#include "llcsaps.h"
-#include "resolv.h"
-
-/* Include this for GVRP dissector */
-#include "packet-gvrp.h"
+#include "ppptypes.h"
+#include "chdlctypes.h"
+#include <epan/resolv.h>
/* Offsets of fields within a BPDU */
#define BPDU_MAX_AGE 29
#define BPDU_HELLO_TIME 31
#define BPDU_FORWARD_DELAY 33
+#define BPDU_VERSION_1_LENGTH 35
+#define BPDU_VERSION_3_LENGTH 36
+#define BPDU_MST_CONFIG_FORMAT_SELECTOR 38
+#define BPDU_MST_CONFIG_NAME 39
+#define BPDU_MST_CONFIG_REVISION_LEVEL 71
+#define BPDU_MST_CONFIG_DIGEST 73
+#define BPDU_CIST_INTERNAL_ROOT_PATH_COST 89
+#define BPDU_CIST_BRIDGE_IDENTIFIER 93
+#define BPDU_CIST_REMAINING_HOPS 101
+#define BPDU_MSTI 102
+#define MSTI_FLAGS 0
+#define MSTI_REGIONAL_ROOT 1
+#define MSTI_INTERNAL_ROOT_PATH_COST 9
+#define MSTI_BRIDGE_IDENTIFIER_PRIORITY 13
+#define MSTI_PORT_IDENTIFIER_PRIORITY 14
+#define MSTI_REMAINING_HOPS 15
+
+#define CONF_BPDU_SIZE 35
+#define TC_BPDU_SIZE 4
+#define RST_BPDU_SIZE 36
+#define VERSION_3_STATIC_LENGTH 64
+#define MSTI_MESSAGE_SIZE 16
+
+/* Flag bits */
+
+#define BPDU_FLAGS_TCACK 0x80
+#define BPDU_FLAGS_AGREEMENT 0x40
+#define BPDU_FLAGS_FORWARDING 0x20
+#define BPDU_FLAGS_LEARNING 0x10
+#define BPDU_FLAGS_PORT_ROLE_MASK 0x0C
+#define BPDU_FLAGS_PORT_ROLE_SHIFT 2
+#define BPDU_FLAGS_PROPOSAL 0x02
+#define BPDU_FLAGS_TC 0x01
static int proto_bpdu = -1;
static int hf_bpdu_proto_id = -1;
static int hf_bpdu_version_id = -1;
static int hf_bpdu_type = -1;
static int hf_bpdu_flags = -1;
+static int hf_bpdu_flags_tcack = -1;
+static int hf_bpdu_flags_agreement = -1;
+static int hf_bpdu_flags_forwarding = -1;
+static int hf_bpdu_flags_learning = -1;
+static int hf_bpdu_flags_port_role = -1;
+static int hf_bpdu_flags_proposal = -1;
+static int hf_bpdu_flags_tc = -1;
static int hf_bpdu_root_mac = -1;
static int hf_bpdu_root_cost = -1;
static int hf_bpdu_bridge_mac = -1;
static int hf_bpdu_max_age = -1;
static int hf_bpdu_hello_time = -1;
static int hf_bpdu_forward_delay = -1;
+static int hf_bpdu_version_1_length = -1;
+static int hf_bpdu_version_3_length = -1;
+static int hf_bpdu_mst_config_format_selector = -1;
+static int hf_bpdu_mst_config_name = -1;
+static int hf_bpdu_mst_config_revision_level = -1;
+static int hf_bpdu_mst_config_digest = -1;
+static int hf_bpdu_cist_internal_root_path_cost = -1;
+static int hf_bpdu_cist_bridge_identifier_mac = -1;
+static int hf_bpdu_cist_remaining_hops = -1;
+static int hf_bpdu_msti_flags = -1;
+static int hf_bpdu_msti_regional_root_mac = -1;
+static int hf_bpdu_msti_internal_root_path_cost = -1;
+static int hf_bpdu_msti_bridge_identifier_priority = -1;
+static int hf_bpdu_msti_port_identifier_priority = -1;
+static int hf_bpdu_msti_remaining_hops = -1;
static gint ett_bpdu = -1;
+static gint ett_bpdu_flags = -1;
+static gint ett_mstp = -1;
+static gint ett_msti = -1;
+
+static dissector_handle_t gvrp_handle;
+static dissector_handle_t gmrp_handle;
+static dissector_handle_t data_handle;
+
+static const value_string protocol_id_vals[] = {
+ { 0, "Spanning Tree Protocol" },
+ { 0, NULL }
+};
+
+#define BPDU_TYPE_CONF 0x00 /* STP Configuration BPDU */
+#define BPDU_TYPE_RST 0x02 /* RST BPDU (or MST) */
+#define BPDU_TYPE_TOPOLOGY_CHANGE 0x80 /* STP TCN (Topology change notify) BPDU */
+
+static const value_string bpdu_type_vals[] = {
+ { BPDU_TYPE_CONF, "Configuration" },
+ { BPDU_TYPE_RST, "Rapid/Multiple Spanning Tree" },
+ { BPDU_TYPE_TOPOLOGY_CHANGE, "Topology Change Notification" },
+ { 0, NULL }
+};
+
+#define PROTO_VERSION_STP 0
+#define PROTO_VERSION_RSTP 2
+#define PROTO_VERSION_MSTP 3
+
+static const value_string version_id_vals[] = {
+ { PROTO_VERSION_STP, "Spanning Tree" },
+ { PROTO_VERSION_RSTP, "Rapid Spanning Tree" },
+ { PROTO_VERSION_MSTP, "Multiple Spanning Tree" },
+ { 0, NULL}
+};
+static const value_string role_vals[] = {
+ { 1, "Alternate or Backup" },
+ { 2, "Root" },
+ { 3, "Designated" },
+ { 0, NULL }
+};
+
+static const char initial_sep[] = " (";
+static const char cont_sep[] = ", ";
+
+#define APPEND_BOOLEAN_FLAG(flag, item, string) \
+ if(flag){ \
+ if(item) \
+ proto_item_append_text(item, string, sep); \
+ sep = cont_sep; \
+ }
static void
-dissect_bpdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree) {
+dissect_bpdu(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree)
+{
guint16 protocol_identifier;
guint8 protocol_version_identifier;
guint8 bpdu_type;
guint8 flags;
guint16 root_identifier_bridge_priority;
- guint8 *root_identifier_mac;
+ const guint8 *root_identifier_mac;
gchar *root_identifier_mac_str;
guint32 root_path_cost;
guint16 bridge_identifier_bridge_priority;
- guint8 *bridge_identifier_mac;
+ const guint8 *bridge_identifier_mac;
gchar *bridge_identifier_mac_str;
guint16 port_identifier;
double message_age;
double max_age;
double hello_time;
double forward_delay;
-
- proto_tree *bpdu_tree;
- proto_item *ti;
+ guint16 version_3_length;
+ guint32 cist_internal_root_path_cost;
+ guint8 mst_config_format_selector;
+ guint16 cist_bridge_identifier_bridge_priority;
+ const guint8 *cist_bridge_identifier_mac;
+ gchar *cist_bridge_identifier_mac_str;
+ const guint8 *mst_config_name;
+ guint16 mst_config_revision_level;
+ guint8 cist_remaining_hops, msti_remaining_hops;
+ guint32 msti_internal_root_path_cost;
+ guint32 msti_regional_root_mstid, msti_regional_root_priority;
+ const guint8 *msti_regional_root_mac;
+ gchar *msti_regional_root_mac_str;
+ guint8 msti_bridge_identifier_priority, msti_port_identifier_priority;
+ int length, offset, msti;
- CHECK_DISPLAY_AS_DATA(proto_bpdu, tvb, pinfo, tree);
+ proto_tree *bpdu_tree;
+ proto_tree *mstp_tree, *msti_tree;
+ proto_item *bpdu_item;
+ proto_item *mstp_item, *msti_item;
+ proto_tree *flags_tree;
+ proto_item *flags_item;
+ guint8 rstp_bpdu, mstp_bpdu=0;
+ const char *sep;
/* GARP application frames require special interpretation of the
destination address field; otherwise, they will be mistaken as
- BPDU frames.
+ BPDU frames.
Fortunately, they can be recognized by checking the first 6 octets
of the destination address, which are in the range from
01-80-C2-00-00-20 to 01-80-C2-00-00-2F.
if (pinfo->dl_dst.type == AT_ETHER &&
pinfo->dl_dst.data[0] == 0x01 && pinfo->dl_dst.data[1] == 0x80 &&
pinfo->dl_dst.data[2] == 0xC2 && pinfo->dl_dst.data[3] == 0x00 &&
- pinfo->dl_dst.data[4] == 0x00 && ((pinfo->dl_dst.data[5] & 0x20) == 0x20)) {
+ pinfo->dl_dst.data[4] == 0x00 && ((pinfo->dl_dst.data[5] & 0xF0) == 0x20)) {
protocol_identifier = tvb_get_ntohs(tvb, BPDU_IDENTIFIER);
switch (pinfo->dl_dst.data[5]) {
case 0x20:
- /* Future expansion for GMRP */
- break;
+ /* for GMRP */
+ call_dissector(gmrp_handle, tvb, pinfo, tree);
+ return;
case 0x21:
/* for GVRP */
- dissect_gvrp(tvb, pinfo, tree);
+ call_dissector(gvrp_handle, tvb, pinfo, tree);
return;
}
pinfo->current_proto = "GARP";
- if (check_col(pinfo->fd, COL_PROTOCOL)) {
- col_set_str(pinfo->fd, COL_PROTOCOL, "GARP");
+ if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "GARP");
/* Generic Attribute Registration Protocol */
}
- if (check_col(pinfo->fd, COL_INFO)) {
- col_add_fstr(pinfo->fd, COL_INFO,
+ if (check_col(pinfo->cinfo, COL_INFO)) {
+ col_add_fstr(pinfo->cinfo, COL_INFO,
"Unknown GARP application (0x%02X)",
pinfo->dl_dst.data[5]);
}
return;
}
- pinfo->current_proto = "STP";
+ if (check_col(pinfo->cinfo, COL_PROTOCOL)) {
+ col_set_str(pinfo->cinfo, COL_PROTOCOL, "STP"); /* Spanning Tree Protocol */
+ }
+ if (check_col(pinfo->cinfo, COL_INFO)) {
+ col_clear(pinfo->cinfo, COL_INFO);
+ }
bpdu_type = tvb_get_guint8(tvb, BPDU_TYPE);
- flags = tvb_get_guint8(tvb, BPDU_FLAGS);
- root_identifier_bridge_priority = tvb_get_ntohs(tvb, BPDU_ROOT_IDENTIFIER);
- root_identifier_mac = tvb_get_ptr(tvb, BPDU_ROOT_IDENTIFIER + 2, 6);
- root_identifier_mac_str = ether_to_str(root_identifier_mac);
- root_path_cost = tvb_get_ntohl(tvb, BPDU_ROOT_PATH_COST);
- port_identifier = tvb_get_ntohs(tvb, BPDU_PORT_IDENTIFIER);
-
- if (check_col(pinfo->fd, COL_PROTOCOL)) {
- col_set_str(pinfo->fd, COL_PROTOCOL, "STP"); /* Spanning Tree Protocol */
+
+ protocol_version_identifier = tvb_get_guint8(tvb, BPDU_VERSION_IDENTIFIER);
+
+ switch (bpdu_type) {
+
+ case BPDU_TYPE_CONF:
+ case BPDU_TYPE_RST:
+ flags = tvb_get_guint8(tvb, BPDU_FLAGS);
+ root_identifier_bridge_priority = tvb_get_ntohs(tvb,BPDU_ROOT_IDENTIFIER);
+ root_identifier_mac = tvb_get_ptr(tvb, BPDU_ROOT_IDENTIFIER + 2, 6);
+ root_identifier_mac_str = ether_to_str(root_identifier_mac);
+ root_path_cost = tvb_get_ntohl(tvb, BPDU_ROOT_PATH_COST);
+ port_identifier = tvb_get_ntohs(tvb, BPDU_PORT_IDENTIFIER);
+ break;
+
+ default:
+ /* Squelch GCC complaints. */
+ flags = 0;
+ root_identifier_bridge_priority = 0;
+ root_identifier_mac = NULL;
+ root_identifier_mac_str = NULL;
+ root_path_cost = 0;
+ port_identifier = 0;
+ break;
}
- if (check_col(pinfo->fd, COL_INFO)) {
- if (bpdu_type == 0)
- col_add_fstr(pinfo->fd, COL_INFO, "Conf. %sRoot = %d/%s Cost = %d Port = 0x%04x",
+ if (check_col(pinfo->cinfo, COL_INFO)) {
+ switch (bpdu_type) {
+
+ case BPDU_TYPE_CONF:
+ col_add_fstr(pinfo->cinfo, COL_INFO, "Conf. %sRoot = %d/%s Cost = %d Port = 0x%04x",
+ flags & 0x1 ? "TC + " : "",
+ root_identifier_bridge_priority, root_identifier_mac_str, root_path_cost,
+ port_identifier);
+ break;
+
+ case BPDU_TYPE_TOPOLOGY_CHANGE:
+ col_add_fstr(pinfo->cinfo, COL_INFO, "Topology Change Notification");
+ break;
+
+ case BPDU_TYPE_RST:
+ col_add_fstr(pinfo->cinfo, COL_INFO, "%cST. %sRoot = %d/%s Cost = %d Port = 0x%04x",
+ protocol_version_identifier == 3 ? 'M':'R',
flags & 0x1 ? "TC + " : "",
root_identifier_bridge_priority, root_identifier_mac_str, root_path_cost,
port_identifier);
- else if (bpdu_type == 0x80)
- col_add_fstr(pinfo->fd, COL_INFO, "Topology Change Notification");
+ break;
+
+ default:
+ col_add_fstr(pinfo->cinfo, COL_INFO, "Unknown BPDU type (%u)",
+ bpdu_type);
+ break;
+ }
+ }
+
+ switch (bpdu_type) {
+
+ case BPDU_TYPE_CONF:
+ set_actual_length(tvb, CONF_BPDU_SIZE);
+ break;
+
+ case BPDU_TYPE_TOPOLOGY_CHANGE:
+ set_actual_length(tvb, TC_BPDU_SIZE);
+ break;
+
+ case BPDU_TYPE_RST:
+ if (protocol_version_identifier == 3) {
+ version_3_length = tvb_get_ntohs(tvb, BPDU_VERSION_3_LENGTH);
+ set_actual_length(tvb, RST_BPDU_SIZE + 2 + version_3_length);
+ } else
+ set_actual_length(tvb, RST_BPDU_SIZE);
+ break;
}
if (tree) {
+ bpdu_item = proto_tree_add_protocol_format(tree, proto_bpdu, tvb,
+ 0, -1, "Spanning Tree Protocol");
+ bpdu_tree = proto_item_add_subtree(bpdu_item, ett_bpdu);
+
protocol_identifier = tvb_get_ntohs(tvb, BPDU_IDENTIFIER);
- protocol_version_identifier = tvb_get_guint8(tvb, BPDU_VERSION_IDENTIFIER);
-
- ti = proto_tree_add_protocol_format(tree, proto_bpdu, tvb, 0, 35,
- "Spanning Tree Protocol");
- bpdu_tree = proto_item_add_subtree(ti, ett_bpdu);
- proto_tree_add_uint_format(bpdu_tree, hf_bpdu_proto_id, tvb,
- BPDU_IDENTIFIER, 2,
- protocol_identifier,
- "Protocol Identifier: 0x%04x (%s)",
- protocol_identifier,
- protocol_identifier == 0 ?
- "Spanning Tree" : "Unknown Protocol");
-
- proto_tree_add_uint(bpdu_tree, hf_bpdu_version_id, tvb,
- BPDU_VERSION_IDENTIFIER, 1,
+ proto_tree_add_uint(bpdu_tree, hf_bpdu_proto_id, tvb,
+ BPDU_IDENTIFIER, 2, protocol_identifier);
+
+ proto_tree_add_uint(bpdu_tree, hf_bpdu_version_id, tvb,
+ BPDU_VERSION_IDENTIFIER, 1,
protocol_version_identifier);
- if (protocol_version_identifier != 0)
+ switch (protocol_version_identifier) {
+ case 0:
+ break;
+ case 2:
+ case 3:
+ break;
+ default:
proto_tree_add_text(bpdu_tree, tvb, BPDU_VERSION_IDENTIFIER, 1,
- " (Warning: this version of Ethereal only knows about version = 0)");
- proto_tree_add_uint_format(bpdu_tree, hf_bpdu_type, tvb,
- BPDU_TYPE, 1,
- bpdu_type,
- "BPDU Type: 0x%02x (%s)",
- bpdu_type,
- bpdu_type == 0 ? "Configuration" :
- bpdu_type == 0x80 ? "Topology Change Notification" : "Unknown");
-
- if (bpdu_type != 0) {
- dissect_data(tvb, BPDU_TYPE + 1, pinfo, tree);
+ " (Warning: this version of Ethereal only knows about versions 0, 2 & 3)");
+ break;
+ }
+ proto_tree_add_uint(bpdu_tree, hf_bpdu_type, tvb,
+ BPDU_TYPE, 1,
+ bpdu_type);
+
+ if (bpdu_type != BPDU_TYPE_CONF && bpdu_type != BPDU_TYPE_RST) {
+ call_dissector(data_handle,
+ tvb_new_subset(tvb, BPDU_TYPE + 1, -1, -1),
+ pinfo, tree);
return;
}
+ rstp_bpdu = (bpdu_type == BPDU_TYPE_RST);
+ if (rstp_bpdu) mstp_bpdu = (protocol_version_identifier == 3);
+
bridge_identifier_bridge_priority = tvb_get_ntohs(tvb, BPDU_BRIDGE_IDENTIFIER);
bridge_identifier_mac = tvb_get_ptr(tvb, BPDU_BRIDGE_IDENTIFIER + 2, 6);
bridge_identifier_mac_str = ether_to_str(bridge_identifier_mac);
- message_age = tvb_get_ntohs(tvb, BPDU_MESSAGE_AGE) / 256.0;
- max_age = tvb_get_ntohs(tvb, BPDU_MAX_AGE) / 256.0;
- hello_time = tvb_get_ntohs(tvb, BPDU_HELLO_TIME) / 256.0;
- forward_delay = tvb_get_ntohs(tvb, BPDU_FORWARD_DELAY) / 256.0;
- proto_tree_add_uint(bpdu_tree, hf_bpdu_flags, tvb,
+ flags_item = proto_tree_add_uint(bpdu_tree, hf_bpdu_flags, tvb,
BPDU_FLAGS, 1, flags);
- if (flags & 0x80)
- 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");
+ flags_tree = proto_item_add_subtree(flags_item, ett_bpdu_flags);
+ sep = initial_sep;
+ APPEND_BOOLEAN_FLAG(flags & BPDU_FLAGS_TCACK, flags_item,
+ "%sTopology Change Acknowledgment");
+ proto_tree_add_boolean(flags_tree, hf_bpdu_flags_tcack, tvb,
+ BPDU_FLAGS, 1, flags);
+ if (rstp_bpdu) {
+ APPEND_BOOLEAN_FLAG(flags & BPDU_FLAGS_AGREEMENT, flags_item,
+ "%sAgreement");
+ proto_tree_add_boolean(flags_tree, hf_bpdu_flags_agreement, tvb,
+ BPDU_FLAGS, 1, flags);
+ APPEND_BOOLEAN_FLAG(flags & BPDU_FLAGS_FORWARDING, flags_item,
+ "%sForwarding");
+ proto_tree_add_boolean(flags_tree, hf_bpdu_flags_forwarding, tvb,
+ BPDU_FLAGS, 1, flags);
+ APPEND_BOOLEAN_FLAG(flags & BPDU_FLAGS_LEARNING, flags_item,
+ "%sLearning");
+ proto_tree_add_boolean(flags_tree, hf_bpdu_flags_learning, tvb,
+ BPDU_FLAGS, 1, flags);
+ if (flags_item) {
+ guint8 port_role;
+
+ port_role = (flags & BPDU_FLAGS_PORT_ROLE_MASK) >> BPDU_FLAGS_PORT_ROLE_SHIFT;
+ proto_item_append_text(flags_item, "%sPort Role: %s", sep,
+ val_to_str(port_role, role_vals,
+ "Unknown (%u)"));
+ }
+ sep = cont_sep;
+ proto_tree_add_uint(flags_tree, hf_bpdu_flags_port_role, tvb,
+ BPDU_FLAGS, 1, flags);
+ APPEND_BOOLEAN_FLAG(flags & BPDU_FLAGS_PROPOSAL, flags_item,
+ "%sProposal");
+ proto_tree_add_boolean(flags_tree, hf_bpdu_flags_proposal, tvb,
+ BPDU_FLAGS, 1, flags);
+ }
+ APPEND_BOOLEAN_FLAG(flags & BPDU_FLAGS_TC, flags_item,
+ "%sTopology Change");
+ proto_tree_add_boolean(flags_tree, hf_bpdu_flags_tc, tvb,
+ BPDU_FLAGS, 1, flags);
+ if (sep != initial_sep) {
+ /* We put something in; put in the terminating ")" */
+ proto_item_append_text(flags_item, ")");
+ }
proto_tree_add_ether_hidden(bpdu_tree, hf_bpdu_root_mac, tvb,
BPDU_ROOT_IDENTIFIER + 2, 6,
root_identifier_mac);
- proto_tree_add_text(bpdu_tree, tvb,
- BPDU_ROOT_IDENTIFIER, 8,
- "Root Identifier: %d / %s",
- root_identifier_bridge_priority,
+ proto_tree_add_text(bpdu_tree, tvb,
+ BPDU_ROOT_IDENTIFIER, 8,
+ "Root Identifier: %d / %s",
+ root_identifier_bridge_priority,
root_identifier_mac_str);
- proto_tree_add_uint(bpdu_tree, hf_bpdu_root_cost, tvb,
- BPDU_ROOT_PATH_COST, 4,
+ proto_tree_add_uint(bpdu_tree, hf_bpdu_root_cost, tvb,
+ BPDU_ROOT_PATH_COST, 4,
root_path_cost);
- proto_tree_add_text(bpdu_tree, tvb,
- BPDU_BRIDGE_IDENTIFIER, 8,
- "Bridge Identifier: %d / %s",
- bridge_identifier_bridge_priority,
+ proto_tree_add_text(bpdu_tree, tvb,
+ BPDU_BRIDGE_IDENTIFIER, 8,
+ "Bridge Identifier: %d / %s",
+ bridge_identifier_bridge_priority,
bridge_identifier_mac_str);
proto_tree_add_ether_hidden(bpdu_tree, hf_bpdu_bridge_mac, tvb,
BPDU_BRIDGE_IDENTIFIER + 2, 6,
bridge_identifier_mac);
proto_tree_add_uint(bpdu_tree, hf_bpdu_port_id, tvb,
- BPDU_PORT_IDENTIFIER, 2,
+ BPDU_PORT_IDENTIFIER, 2,
port_identifier);
+ message_age = tvb_get_ntohs(tvb, BPDU_MESSAGE_AGE) / 256.0;
proto_tree_add_double(bpdu_tree, hf_bpdu_msg_age, tvb,
- BPDU_MESSAGE_AGE, 2,
+ BPDU_MESSAGE_AGE, 2,
message_age);
+ max_age = tvb_get_ntohs(tvb, BPDU_MAX_AGE) / 256.0;
proto_tree_add_double(bpdu_tree, hf_bpdu_max_age, tvb,
- BPDU_MAX_AGE, 2,
+ BPDU_MAX_AGE, 2,
max_age);
+ hello_time = tvb_get_ntohs(tvb, BPDU_HELLO_TIME) / 256.0;
proto_tree_add_double(bpdu_tree, hf_bpdu_hello_time, tvb,
- BPDU_HELLO_TIME, 2,
+ BPDU_HELLO_TIME, 2,
hello_time);
+ forward_delay = tvb_get_ntohs(tvb, BPDU_FORWARD_DELAY) / 256.0;
proto_tree_add_double(bpdu_tree, hf_bpdu_forward_delay, tvb,
- BPDU_FORWARD_DELAY, 2,
+ BPDU_FORWARD_DELAY, 2,
forward_delay);
+ if (rstp_bpdu) {
+ proto_tree_add_item(bpdu_tree, hf_bpdu_version_1_length, tvb,
+ BPDU_VERSION_1_LENGTH, 1, FALSE);
+ }
+ if (mstp_bpdu) {
+ version_3_length = tvb_get_ntohs(tvb, BPDU_VERSION_3_LENGTH);
+
+ mstp_item = proto_tree_add_uint(bpdu_tree, hf_bpdu_version_3_length, tvb,
+ BPDU_VERSION_3_LENGTH, 2, version_3_length);
+ mstp_tree = proto_item_add_subtree(mstp_item, ett_mstp);
+
+
+ mst_config_format_selector = tvb_get_guint8(tvb, BPDU_MST_CONFIG_FORMAT_SELECTOR);
+ proto_tree_add_uint(mstp_tree, hf_bpdu_mst_config_format_selector, tvb,
+ BPDU_MST_CONFIG_FORMAT_SELECTOR, 1, mst_config_format_selector);
+ mst_config_name = tvb_get_ptr (tvb, BPDU_MST_CONFIG_NAME, 32);
+ proto_tree_add_string(mstp_tree, hf_bpdu_mst_config_name, tvb, BPDU_MST_CONFIG_NAME, 32, mst_config_name);
+
+ mst_config_revision_level = tvb_get_ntohs(tvb, BPDU_MST_CONFIG_REVISION_LEVEL);
+ proto_tree_add_uint(mstp_tree, hf_bpdu_mst_config_revision_level, tvb,
+ BPDU_MST_CONFIG_REVISION_LEVEL, 2, mst_config_revision_level);
+ proto_tree_add_bytes(mstp_tree, hf_bpdu_mst_config_digest, tvb,
+ BPDU_MST_CONFIG_DIGEST, 16, tvb_get_ptr(tvb, BPDU_MST_CONFIG_DIGEST, 16));
+
+ cist_internal_root_path_cost = tvb_get_ntohl(tvb, BPDU_CIST_INTERNAL_ROOT_PATH_COST);
+ proto_tree_add_uint(mstp_tree, hf_bpdu_cist_internal_root_path_cost, tvb,
+ BPDU_CIST_INTERNAL_ROOT_PATH_COST, 4, cist_internal_root_path_cost);
+
+ cist_bridge_identifier_bridge_priority = tvb_get_ntohs(tvb,BPDU_CIST_BRIDGE_IDENTIFIER);
+ cist_bridge_identifier_mac = tvb_get_ptr(tvb, BPDU_CIST_BRIDGE_IDENTIFIER + 2, 6);
+ cist_bridge_identifier_mac_str = ether_to_str(cist_bridge_identifier_mac);
+ proto_tree_add_text(mstp_tree, tvb, BPDU_CIST_BRIDGE_IDENTIFIER, 8,
+ "CIST Bridge Identifier: %d / %s",
+ cist_bridge_identifier_bridge_priority,
+ cist_bridge_identifier_mac_str);
+ proto_tree_add_ether_hidden(mstp_tree, hf_bpdu_cist_bridge_identifier_mac, tvb,
+ BPDU_CIST_BRIDGE_IDENTIFIER + 2, 6,
+ cist_bridge_identifier_mac);
+
+ cist_remaining_hops = tvb_get_guint8(tvb, BPDU_CIST_REMAINING_HOPS);
+ proto_tree_add_uint(mstp_tree, hf_bpdu_cist_remaining_hops, tvb,
+ BPDU_CIST_REMAINING_HOPS, 1, cist_remaining_hops);
+
+ /* MSTI messages */
+ length = version_3_length - VERSION_3_STATIC_LENGTH;
+ offset = BPDU_MSTI;
+ msti = 1;
+ while (length >= MSTI_MESSAGE_SIZE) {
+ msti_regional_root_mstid = tvb_get_guint8(tvb, offset+ MSTI_REGIONAL_ROOT);
+ msti_regional_root_priority = (msti_regional_root_mstid &0xf0) << 8;
+ msti_regional_root_mstid = ((msti_regional_root_mstid & 0x0f) << 8) +
+ tvb_get_guint8(tvb, offset+ MSTI_REGIONAL_ROOT+1);;
+ msti_regional_root_mac = tvb_get_ptr(tvb, offset+ MSTI_REGIONAL_ROOT + 2, 6);
+ msti_regional_root_mac_str = ether_to_str(msti_regional_root_mac);
+
+ msti_item = proto_tree_add_text(mstp_tree, tvb, offset, 16,
+ "MSTID %d, Regional Root Identifier %d / %s",
+ msti_regional_root_mstid, msti_regional_root_priority,
+ msti_regional_root_mac_str);
+ msti_tree = proto_item_add_subtree(msti_item, ett_msti);
+
+ /* flags */
+ flags_item = proto_tree_add_uint(msti_tree, hf_bpdu_msti_flags, tvb,
+ offset+MSTI_FLAGS, 1, flags);
+
+ sep = initial_sep;
+ APPEND_BOOLEAN_FLAG(flags & BPDU_FLAGS_TCACK, flags_item, "%sMaster");
+ APPEND_BOOLEAN_FLAG(flags & BPDU_FLAGS_AGREEMENT, flags_item, "%sAgreement");
+ APPEND_BOOLEAN_FLAG(flags & BPDU_FLAGS_FORWARDING, flags_item, "%sForwarding");
+ APPEND_BOOLEAN_FLAG(flags & BPDU_FLAGS_LEARNING, flags_item, "%sLearning");
+ if (flags_item) {
+ guint8 port_role;
+ port_role = (flags & BPDU_FLAGS_PORT_ROLE_MASK) >> BPDU_FLAGS_PORT_ROLE_SHIFT;
+ proto_item_append_text(flags_item, "%sPort Role: %s", sep,
+ val_to_str(port_role, role_vals, "Unknown (%u)"));
+ }
+ sep = cont_sep;
+ APPEND_BOOLEAN_FLAG(flags & BPDU_FLAGS_PROPOSAL, flags_item, "%sProposal");
+ APPEND_BOOLEAN_FLAG(flags & BPDU_FLAGS_TC, flags_item, "%sTopology Change");
+ if (sep != initial_sep) { /* We put something in; put in the terminating ")" */
+ proto_item_append_text(flags_item, ")");
+ }
+
+ /* pri, MSTID, Regional root */
+ proto_tree_add_ether_hidden(msti_tree, hf_bpdu_msti_regional_root_mac, tvb,
+ offset + MSTI_REGIONAL_ROOT + 2, 6,
+ msti_regional_root_mac);
+ proto_tree_add_text(msti_tree, tvb, offset + MSTI_REGIONAL_ROOT, 8,
+ "MSTID %d, priority %d Root Identifier %s",
+ msti_regional_root_mstid, msti_regional_root_priority,
+ msti_regional_root_mac_str);
+
+
+ msti_internal_root_path_cost = tvb_get_ntohs(tvb, offset+MSTI_INTERNAL_ROOT_PATH_COST);
+ proto_tree_add_uint(msti_tree, hf_bpdu_msti_internal_root_path_cost, tvb,
+ offset+MSTI_INTERNAL_ROOT_PATH_COST, 4, msti_internal_root_path_cost);
+
+ msti_bridge_identifier_priority = tvb_get_guint8(tvb, offset+MSTI_BRIDGE_IDENTIFIER_PRIORITY) >> 4;
+ msti_port_identifier_priority = tvb_get_guint8(tvb, offset+MSTI_PORT_IDENTIFIER_PRIORITY) >> 4;
+
+ proto_tree_add_uint(msti_tree, hf_bpdu_msti_bridge_identifier_priority, tvb,
+ offset+MSTI_BRIDGE_IDENTIFIER_PRIORITY, 1, msti_bridge_identifier_priority);
+ proto_tree_add_uint(msti_tree, hf_bpdu_msti_port_identifier_priority, tvb,
+ offset+MSTI_PORT_IDENTIFIER_PRIORITY, 1, msti_port_identifier_priority);
+
+ msti_remaining_hops = tvb_get_guint8(tvb, offset+MSTI_REMAINING_HOPS);
+ proto_tree_add_uint(msti_tree, hf_bpdu_msti_remaining_hops, tvb,
+ offset + MSTI_REMAINING_HOPS, 1, msti_remaining_hops);
+
+ length -= MSTI_MESSAGE_SIZE;
+ offset += MSTI_MESSAGE_SIZE;
+ msti++;
+ }
+
+ }
}
}
+static const true_false_string yesno = {
+ "Yes",
+ "No"
+};
+
void
proto_register_bpdu(void)
{
static hf_register_info hf[] = {
{ &hf_bpdu_proto_id,
{ "Protocol Identifier", "stp.protocol",
- FT_UINT16, BASE_HEX, NULL, 0x0,
- "" }},
+ FT_UINT16, BASE_HEX, VALS(&protocol_id_vals), 0x0,
+ "", HFILL }},
{ &hf_bpdu_version_id,
{ "Protocol Version Identifier", "stp.version",
- FT_UINT8, BASE_DEC, NULL, 0x0,
- "" }},
+ FT_UINT8, BASE_DEC, VALS(&version_id_vals), 0x0,
+ "", HFILL }},
{ &hf_bpdu_type,
- { "BPDU type", "stp.type",
- FT_UINT8, BASE_HEX, NULL, 0x0,
- "" }},
+ { "BPDU Type", "stp.type",
+ FT_UINT8, BASE_HEX, VALS(&bpdu_type_vals), 0x0,
+ "", HFILL }},
{ &hf_bpdu_flags,
{ "BPDU flags", "stp.flags",
FT_UINT8, BASE_HEX, NULL, 0x0,
- "" }},
+ "", HFILL }},
+ { &hf_bpdu_flags_tcack,
+ { "Topology Change Acknowledgment", "stp.flags.tcack",
+ FT_BOOLEAN, 8, TFS(&yesno), BPDU_FLAGS_TCACK,
+ "", HFILL }},
+ { &hf_bpdu_flags_agreement,
+ { "Agreement", "stp.flags.agreement",
+ FT_BOOLEAN, 8, TFS(&yesno), BPDU_FLAGS_AGREEMENT,
+ "", HFILL }},
+ { &hf_bpdu_flags_forwarding,
+ { "Forwarding", "stp.flags.forwarding",
+ FT_BOOLEAN, 8, TFS(&yesno), BPDU_FLAGS_FORWARDING,
+ "", HFILL }},
+ { &hf_bpdu_flags_learning,
+ { "Learning", "stp.flags.learning",
+ FT_BOOLEAN, 8, TFS(&yesno), BPDU_FLAGS_LEARNING,
+ "", HFILL }},
+ { &hf_bpdu_flags_port_role,
+ { "Port Role", "stp.flags.port_role",
+ FT_UINT8, BASE_DEC, VALS(role_vals), BPDU_FLAGS_PORT_ROLE_MASK,
+ "", HFILL }},
+ { &hf_bpdu_flags_proposal,
+ { "Proposal", "stp.flags.proposal",
+ FT_BOOLEAN, 8, TFS(&yesno), BPDU_FLAGS_PROPOSAL,
+ "", HFILL }},
+ { &hf_bpdu_flags_tc,
+ { "Topology Change", "stp.flags.tc",
+ FT_BOOLEAN, 8, TFS(&yesno), BPDU_FLAGS_TC,
+ "", HFILL }},
{ &hf_bpdu_root_mac,
{ "Root Identifier", "stp.root.hw",
FT_ETHER, BASE_NONE, NULL, 0x0,
- "" }},
+ "", HFILL }},
{ &hf_bpdu_root_cost,
{ "Root Path Cost", "stp.root.cost",
FT_UINT32, BASE_DEC, NULL, 0x0,
- "" }},
+ "", HFILL }},
{ &hf_bpdu_bridge_mac,
{ "Bridge Identifier", "stp.bridge.hw",
FT_ETHER, BASE_NONE, NULL, 0x0,
- ""}},
+ "", HFILL }},
{ &hf_bpdu_port_id,
{ "Port identifier", "stp.port",
FT_UINT16, BASE_HEX, NULL, 0x0,
- ""}},
+ "", HFILL }},
{ &hf_bpdu_msg_age,
{ "Message Age", "stp.msg_age",
FT_DOUBLE, BASE_NONE, NULL, 0x0,
- "" }},
+ "", HFILL }},
{ &hf_bpdu_max_age,
{ "Max Age", "stp.max_age",
FT_DOUBLE, BASE_NONE, NULL, 0x0,
- "" }},
+ "", HFILL }},
{ &hf_bpdu_hello_time,
{ "Hello Time", "stp.hello",
FT_DOUBLE, BASE_NONE, NULL, 0x0,
- "" }},
+ "", HFILL }},
{ &hf_bpdu_forward_delay,
{ "Forward Delay", "stp.forward",
FT_DOUBLE, BASE_NONE, NULL, 0x0,
- "" }},
+ "", HFILL }},
+ { &hf_bpdu_version_1_length,
+ { "Version 1 Length", "stp.version_1_length",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_version_3_length,
+ { "MST Extension, Length", "mstp.version_3_length",
+ FT_UINT16, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_mst_config_format_selector,
+ { "MST Config ID format selector", "mstp.config_format_selector",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_mst_config_name,
+ { "MST Config name", "mstp.config_name",
+ FT_STRING, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_mst_config_revision_level,
+ { "MST Config revision", "mstp.config_revision_level",
+ FT_UINT16, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_mst_config_digest,
+ { "MST Config digest", "mstp.config_digest",
+ FT_BYTES, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_cist_internal_root_path_cost,
+ { "CIST Internal Root Path Cost", "mstp.cist_internal_root_path_cost",
+ FT_UINT32, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_cist_bridge_identifier_mac,
+ { "CIST Bridge Identifier", "mstp.cist_bridge.hw",
+ FT_ETHER, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_cist_remaining_hops,
+ { "CIST Remaining hops", "mstp.cist_remaining_hops",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_msti_flags,
+ { "MSTI flags", "mstp.msti.flags",
+ FT_UINT8, BASE_HEX, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_msti_regional_root_mac,
+ { "Regional Root", "mstp.msti.root.hw",
+ FT_ETHER, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_msti_internal_root_path_cost,
+ { "Internal root path cost", "mstp.msti.root_cost",
+ FT_UINT32, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_msti_bridge_identifier_priority,
+ { "Bridge Identifier Priority", "mstp.msti.bridge_priority",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_msti_port_identifier_priority,
+ { "Port identifier prority", "mstp.msti.port_priority",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+ { &hf_bpdu_msti_remaining_hops,
+ { "Remaining hops", "mstp.msti.remaining_hops",
+ FT_UINT8, BASE_DEC, NULL, 0x0,
+ "", HFILL }},
+
};
static gint *ett[] = {
&ett_bpdu,
+ &ett_bpdu_flags,
+ &ett_mstp,
+ &ett_msti
};
proto_bpdu = proto_register_protocol("Spanning Tree Protocol", "STP", "stp");
void
proto_reg_handoff_bpdu(void)
{
- dissector_add("llc.dsap", SAP_BPDU, dissect_bpdu, proto_bpdu);
+ dissector_handle_t bpdu_handle;
+
+ /*
+ * Get handle for the GVRP dissector.
+ */
+ gvrp_handle = find_dissector("gvrp");
+
+ /*
+ * Get handle for the GMRP dissector.
+ */
+ gmrp_handle = find_dissector("gmrp");
+ data_handle = find_dissector("data");
+
+ bpdu_handle = find_dissector("bpdu");
+ dissector_add("llc.dsap", SAP_BPDU, bpdu_handle);
+ dissector_add("ppp.protocol", PPP_BPDU, bpdu_handle);
+ dissector_add("chdlctype", CHDLCTYPE_BPDU, bpdu_handle);
}
git.samba.org / obnox / wireshark / wip.git / blobdiff