/* packet-isis-hello.c
* Routines for decoding isis hello packets and their CLVs
*
- * $Id: packet-isis-hello.c,v 1.6 2000/04/15 22:11:09 guy Exp $
+ * $Id: packet-isis-hello.c,v 1.34 2003/12/08 20:40:32 guy Exp $
* Stuart Stanley <stuarts@mxmail.net>
*
* 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.
- *
- *
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
-#ifdef HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-
#include <stdio.h>
#include <string.h>
#include <glib.h>
-#include "packet.h"
+#include <epan/packet.h>
#include "packet-osi.h"
#include "packet-isis.h"
#include "packet-isis-clv.h"
#include "packet-isis-hello.h"
+#include "epan/resolv.h"
/* hello packets */
-static int proto_isis_hello = -1;
-static int hf_isis_hello_circuit_reserved = -1;
-static int hf_isis_hello_source_id = -1;
-static int hf_isis_hello_holding_timer = -1;
-static int hf_isis_hello_pdu_length = -1;
-static int hf_isis_hello_priority_reserved = -1;
-static int hf_isis_hello_lan_id = -1;
-static int hf_isis_hello_local_circuit_id = -1;
-static int hf_isis_hello_clv_ipv4_int_addr = -1;
-
-static gint ett_isis_hello = -1;
-static gint ett_isis_hello_clv_area_addr = -1;
-static gint ett_isis_hello_clv_is_neighbors = -1;
-static gint ett_isis_hello_clv_padding = -1;
-static gint ett_isis_hello_clv_unknown = -1;
-static gint ett_isis_hello_clv_nlpid = -1;
-static gint ett_isis_hello_clv_auth = -1;
+static int hf_isis_hello_circuit_reserved = -1;
+static int hf_isis_hello_source_id = -1;
+static int hf_isis_hello_holding_timer = -1;
+static int hf_isis_hello_pdu_length = -1;
+static int hf_isis_hello_priority_reserved = -1;
+static int hf_isis_hello_lan_id = -1;
+static int hf_isis_hello_local_circuit_id = -1;
+static int hf_isis_hello_clv_ipv4_int_addr = -1;
+static int hf_isis_hello_clv_ipv6_int_addr = -1;
+static int hf_isis_hello_clv_ptp_adj = -1;
+static int hf_isis_hello_clv_mt = -1;
+
+static gint ett_isis_hello = -1;
+static gint ett_isis_hello_clv_area_addr = -1;
+static gint ett_isis_hello_clv_is_neighbors = -1;
+static gint ett_isis_hello_clv_padding = -1;
+static gint ett_isis_hello_clv_unknown = -1;
+static gint ett_isis_hello_clv_nlpid = -1;
+static gint ett_isis_hello_clv_authentication = -1;
+static gint ett_isis_hello_clv_ip_authentication = -1;
static gint ett_isis_hello_clv_ipv4_int_addr = -1;
+static gint ett_isis_hello_clv_ipv6_int_addr = -1;
+static gint ett_isis_hello_clv_ptp_adj = -1;
+static gint ett_isis_hello_clv_mt = -1;
+static gint ett_isis_hello_clv_restart = -1;
+static gint ett_isis_hello_clv_checksum = -1;
static const value_string isis_hello_circuit_type_vals[] = {
{ ISIS_HELLO_TYPE_RESERVED, "Reserved 0 (discard PDU)"},
{ ISIS_HELLO_TYPE_LEVEL_12, "Level 1 and 2"},
{ 0, NULL} };
-/*
+/*
* Predclare dissectors for use in clv dissection.
*/
-static void dissect_hello_area_address_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree);
-static void dissect_hello_is_neighbors_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree);
-static void dissect_hello_padding_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree);
-static void dissect_hello_nlpid_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree);
-static void dissect_hello_ip_int_addr_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree);
-static void dissect_hello_auth_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree);
+static void dissect_hello_padding_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length, int length);
+static void dissect_hello_is_neighbors_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length, int length);
+static void dissect_hello_ptp_adj_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length, int length);
+static void dissect_hello_area_address_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length, int length);
+static void dissect_hello_authentication_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length, int length);
+static void dissect_hello_ip_authentication_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length, int length);
+static void dissect_hello_checksum_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length, int length);
+static void dissect_hello_ipv6_int_addr_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length, int length);
+static void dissect_hello_ip_int_addr_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length, int length);
+static void dissect_hello_mt_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length, int length);
+static void dissect_hello_nlpid_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length, int length);
+static void dissect_hello_restart_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length, int length);
+
static const isis_clv_handle_t clv_l1_hello_opts[] = {
{
- ISIS_CLV_L1H_AREA_ADDRESS,
+ ISIS_CLV_AREA_ADDRESS,
"Area address(es)",
&ett_isis_hello_clv_area_addr,
dissect_hello_area_address_clv
},
{
- ISIS_CLV_L1H_IS_NEIGHBORS,
+ ISIS_CLV_IS_NEIGHBORS,
"IS Neighbor(s)",
&ett_isis_hello_clv_is_neighbors,
dissect_hello_is_neighbors_clv
},
{
- ISIS_CLV_L1H_PADDING,
+ ISIS_CLV_PADDING,
"Padding",
&ett_isis_hello_clv_padding,
dissect_hello_padding_clv
},
{
- ISIS_CLV_L1H_NLPID,
- "NLPID",
+ ISIS_CLV_PROTOCOLS_SUPPORTED,
+ "Protocols Supported",
&ett_isis_hello_clv_nlpid,
dissect_hello_nlpid_clv
},
{
- ISIS_CLV_L1H_IP_INTERFACE_ADDR,
+ ISIS_CLV_IP_ADDR,
"IP Interface address(es)",
&ett_isis_hello_clv_ipv4_int_addr,
dissect_hello_ip_int_addr_clv
},
{
- ISIS_CLV_L1H_AUTHENTICATION_NS,
- "Authentication(non spec)",
- &ett_isis_hello_clv_auth,
- dissect_hello_auth_clv
+ ISIS_CLV_IP6_ADDR,
+ "IPv6 Interface address(es)",
+ &ett_isis_hello_clv_ipv6_int_addr,
+ dissect_hello_ipv6_int_addr_clv
+ },
+ {
+ ISIS_CLV_RESTART,
+ "Restart Signaling",
+ &ett_isis_hello_clv_restart,
+ dissect_hello_restart_clv
},
{
- ISIS_CLV_L1H_AUTHENTICATION,
+ ISIS_CLV_AUTHENTICATION,
"Authentication",
- &ett_isis_hello_clv_auth,
- dissect_hello_auth_clv
+ &ett_isis_hello_clv_authentication,
+ dissect_hello_authentication_clv
+ },
+ {
+ ISIS_CLV_IP_AUTHENTICATION,
+ "IP Authentication",
+ &ett_isis_hello_clv_ip_authentication,
+ dissect_hello_ip_authentication_clv
+ },
+ {
+ ISIS_CLV_MT_SUPPORTED,
+ "Multi Topology",
+ &ett_isis_hello_clv_mt,
+ dissect_hello_mt_clv
+ },
+ {
+ ISIS_CLV_CHECKSUM,
+ "Checksum",
+ &ett_isis_hello_clv_checksum,
+ dissect_hello_checksum_clv
},
{
0,
static const isis_clv_handle_t clv_l2_hello_opts[] = {
{
- ISIS_CLV_L2H_AREA_ADDRESS,
+ ISIS_CLV_AREA_ADDRESS,
"Area address(es)",
&ett_isis_hello_clv_area_addr,
dissect_hello_area_address_clv
},
{
- ISIS_CLV_L2H_IS_NEIGHBORS,
+ ISIS_CLV_IS_NEIGHBORS,
"IS Neighbor(s)",
&ett_isis_hello_clv_is_neighbors,
dissect_hello_is_neighbors_clv
},
{
- ISIS_CLV_L2H_PADDING,
+ ISIS_CLV_PADDING,
"Padding",
&ett_isis_hello_clv_padding,
dissect_hello_padding_clv
},
{
- ISIS_CLV_L2H_NLPID,
- "NLPID",
+ ISIS_CLV_PROTOCOLS_SUPPORTED,
+ "Protocols Supported",
&ett_isis_hello_clv_nlpid,
dissect_hello_nlpid_clv
},
{
- ISIS_CLV_L2H_IP_INTERFACE_ADDR,
+ ISIS_CLV_IP_ADDR,
"IP Interface address(es)",
&ett_isis_hello_clv_ipv4_int_addr,
dissect_hello_ip_int_addr_clv
},
{
- ISIS_CLV_L2H_AUTHENTICATION_NS,
- "Authentication(non spec)",
- &ett_isis_hello_clv_auth,
- dissect_hello_auth_clv
+ ISIS_CLV_IP6_ADDR,
+ "IPv6 Interface address(es)",
+ &ett_isis_hello_clv_ipv6_int_addr,
+ dissect_hello_ipv6_int_addr_clv
},
{
- ISIS_CLV_L2H_AUTHENTICATION,
+ ISIS_CLV_AUTHENTICATION,
"Authentication",
- &ett_isis_hello_clv_auth,
- dissect_hello_auth_clv
+ &ett_isis_hello_clv_authentication,
+ dissect_hello_authentication_clv
+ },
+ {
+ ISIS_CLV_IP_AUTHENTICATION,
+ "IP Authentication",
+ &ett_isis_hello_clv_ip_authentication,
+ dissect_hello_ip_authentication_clv
+ },
+ {
+ ISIS_CLV_RESTART,
+ "Restart Signaling",
+ &ett_isis_hello_clv_restart,
+ dissect_hello_restart_clv
+ },
+ {
+ ISIS_CLV_MT_SUPPORTED,
+ "Multi Topology",
+ &ett_isis_hello_clv_mt,
+ dissect_hello_mt_clv
+ },
+ {
+ ISIS_CLV_CHECKSUM,
+ "Checksum",
+ &ett_isis_hello_clv_checksum,
+ dissect_hello_checksum_clv
},
{
0,
static const isis_clv_handle_t clv_ptp_hello_opts[] = {
{
- ISIS_CLV_PTP_AREA_ADDRESS,
+ ISIS_CLV_AREA_ADDRESS,
"Area address(es)",
&ett_isis_hello_clv_area_addr,
dissect_hello_area_address_clv
},
{
- ISIS_CLV_PTP_PADDING,
+ ISIS_CLV_PADDING,
"Padding",
&ett_isis_hello_clv_padding,
dissect_hello_padding_clv
},
{
- ISIS_CLV_PTP_NLPID,
- "NLPID",
+ ISIS_CLV_PROTOCOLS_SUPPORTED,
+ "Protocols Supported",
&ett_isis_hello_clv_nlpid,
dissect_hello_nlpid_clv
},
{
- ISIS_CLV_PTP_IP_INTERFACE_ADDR,
+ ISIS_CLV_IP_ADDR,
"IP Interface address(es)",
&ett_isis_hello_clv_ipv4_int_addr,
dissect_hello_ip_int_addr_clv
},
{
- ISIS_CLV_PTP_AUTHENTICATION_NS,
- "Authentication(non spec)",
- &ett_isis_hello_clv_auth,
- dissect_hello_auth_clv
+ ISIS_CLV_IP6_ADDR,
+ "IPv6 Interface address(es)",
+ &ett_isis_hello_clv_ipv6_int_addr,
+ dissect_hello_ipv6_int_addr_clv
},
{
- ISIS_CLV_PTP_AUTHENTICATION,
+ ISIS_CLV_AUTHENTICATION,
"Authentication",
- &ett_isis_hello_clv_auth,
- dissect_hello_auth_clv
+ &ett_isis_hello_clv_authentication,
+ dissect_hello_authentication_clv
+ },
+ {
+ ISIS_CLV_IP_AUTHENTICATION,
+ "IP Authentication",
+ &ett_isis_hello_clv_ip_authentication,
+ dissect_hello_ip_authentication_clv
+ },
+ {
+ ISIS_CLV_RESTART,
+ "Restart Option",
+ &ett_isis_hello_clv_restart,
+ dissect_hello_restart_clv
+ },
+ {
+ ISIS_CLV_PTP_ADJ_STATE,
+ "Point-to-point Adjacency State",
+ &ett_isis_hello_clv_ptp_adj,
+ dissect_hello_ptp_adj_clv
+ },
+ {
+ ISIS_CLV_MT_SUPPORTED,
+ "Multi Topology",
+ &ett_isis_hello_clv_mt,
+ dissect_hello_mt_clv
+ },
+ {
+ ISIS_CLV_CHECKSUM,
+ "Checksum",
+ &ett_isis_hello_clv_checksum,
+ dissect_hello_checksum_clv
},
{
0,
}
};
+
+/*
+ * Name: dissect_hello_restart_clv()
+ *
+ * Description:
+ * Decode for a restart clv - only found in IIHs
+ * hence no call in the common clv dissector
+ *
+ */
+
+static void
+dissect_hello_restart_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length _U_, int length)
+{
+ int restart_options;
+
+ if (length != 3) {
+ isis_dissect_unknown(tvb, tree, offset,
+ "malformed TLV (%d vs 3)",
+ length, 3 );
+ return;
+ }
+
+ restart_options = tvb_get_guint8(tvb, offset);
+
+ proto_tree_add_text ( tree, tvb, offset, 1,
+ "Restart Request bit %s, "
+ "Restart Acknowledgement bit %s",
+ ISIS_MASK_RESTART_RR(restart_options) ? "set" : "clear",
+ ISIS_MASK_RESTART_RA(restart_options) ? "set" : "clear");
+ proto_tree_add_text ( tree, tvb, offset+1, 2,
+ "Remaining holding time: %us",
+ tvb_get_ntohs(tvb, offset+1) );
+}
+
/*
* Name: dissect_hello_nlpid_clv()
*
* clv common one.
*
* Input:
- * u_char * : packet data
+ * tvbuff_t * : tvbuffer for packet data
+ * proto_tree * : proto tree to build on (may be null)
* int : current offset into packet data
- * guint : length of this clv
- * frame_data * : frame data
+ * int : length of IDs in packet.
+ * int : length of this clv
+ *
+ * Output:
+ * void, will modify proto_tree if not null.
+ */
+static void
+dissect_hello_nlpid_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length _U_, int length)
+{
+ isis_dissect_nlpid_clv(tvb, tree, offset, length);
+}
+
+/*
+ * Name: dissect_hello_mt_clv()
+ *
+ * Description:
+ * Decode for a hello packets Multi Topology clv. Calls into the
+ * clv common one.
+ *
+ * Input:
+ * tvbuff_t * : tvbuffer for packet data
* proto_tree * : proto tree to build on (may be null)
+ * int : current offset into packet data
+ * int : length of IDs in packet.
+ * int : length of this clv
*
* Output:
* void, will modify proto_tree if not null.
*/
-static void
-dissect_hello_nlpid_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree) {
- isis_dissect_nlpid_clv(pd, offset, length, fd, tree );
+
+static void
+dissect_hello_mt_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length _U_, int length)
+{
+ isis_dissect_mt_clv(tvb, tree, offset, length,
+ hf_isis_hello_clv_mt );
}
/*
* clv common one.
*
* Input:
- * u_char * : packet data
- * int : current offset into packet data
- * guint : length of this clv
- * frame_data * : frame data
+ * tvbuff_t * : tvbuffer for packet data
* proto_tree * : proto tree to build on (may be null)
+ * int : current offset into packet data
+ * int : length of IDs in packet.
+ * int : length of this clv
*
* Output:
* void, will modify proto_tree if not null.
*/
-static void
-dissect_hello_ip_int_addr_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree) {
- isis_dissect_ip_int_clv(pd, offset, length, fd, tree,
+static void
+dissect_hello_ip_int_addr_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length _U_, int length)
+{
+ isis_dissect_ip_int_clv(tvb, tree, offset, length,
hf_isis_hello_clv_ipv4_int_addr );
}
/*
- * Name: dissect_hello_auth_clv()
+ * Name: dissect_hello_ipv6_int_addr_clv()
*
* Description:
- * Decode for a hello packets authenticaion clv. Calls into the
- * clv common one. An auth inside a hello packet is a perlink
- * password.
+ * Decode for a hello packets ipv6 interface addr clv. Calls into the
+ * clv common one.
*
* Input:
- * u_char * : packet data
+ * tvbuff_t * : tvbuffer for packet data
+ * proto_tree * : proto tree to build on (may be null)
* int : current offset into packet data
- * guint : length of this clv
- * frame_data * : frame data
+ * int : length of IDs in packet.
+ * int : length of this clv
+ *
+ * Output:
+ * void, will modify proto_tree if not null.
+ */
+static void
+dissect_hello_ipv6_int_addr_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length _U_, int length)
+{
+ isis_dissect_ipv6_int_clv(tvb, tree, offset, length,
+ hf_isis_hello_clv_ipv6_int_addr );
+}
+
+/*
+ * Name: dissect_hello_authentication_clv()
+ *
+ * Description:
+ * Decode for a hello packets authenticaion clv.
+ * Calls into the CLV common one.
+ *
+ * Input:
+ * tvbuff_t * : tvbuffer for packet data
* proto_tree * : proto tree to build on (may be null)
+ * int : current offset into packet data
+ * int : length of IDs in packet.
+ * int : length of this clv
*
* Output:
* void, will modify proto_tree if not null.
*/
-static void
-dissect_hello_auth_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree) {
- isis_dissect_authentication_clv(pd, offset, length, fd, tree,
- "Per Link authentication" );
+static void
+dissect_hello_authentication_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length _U_, int length)
+{
+ isis_dissect_authentication_clv(tvb, tree, offset, length);
}
/*
- * Name: dissect_hello_area_address_clv()
+ * Name: dissect_hello_ip_authentication_clv()
*
* Description:
- * Decode for a hello packets area address clv. Calls into the
- * clv common one.
+ * Decode for a hello packets IP authenticaion clv.
+ * Calls into the CLV common one.
*
* Input:
- * u_char * : packet data
+ * tvbuff_t * : tvbuffer for packet data
+ * proto_tree * : proto tree to build on (may be null)
* int : current offset into packet data
- * guint : length of this clv
- * frame_data * : frame data
+ * int : length of IDs in packet.
+ * int : length of this clv
+ *
+ * Output:
+ * void, will modify proto_tree if not null.
+ */
+static void
+dissect_hello_ip_authentication_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length _U_, int length)
+{
+ isis_dissect_ip_authentication_clv(tvb, tree, offset, length);
+}
+
+/*
+ * Name: dissect_hello_checksum_clv()
+ *
+ * Description:
+ * dump and verify the optional checksum in TLV 12
+ *
+ * Input:
+ * tvbuff_t * : tvbuffer for packet data
+ * proto_tree * : protocol display tree to fill out. May be NULL
+ * int : offset into packet data where we are.
+ * int : length of clv we are decoding
+ *
+ * Output:
+ * void, but we will add to proto tree if !NULL.
+ */
+
+static void
+dissect_hello_checksum_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length _U_, int length) {
+
+ guint16 pdu_length,checksum, cacl_checksum=0;
+
+ if (tree) {
+ if ( length != 2 ) {
+ proto_tree_add_text ( tree, tvb, offset, length,
+ "incorrect checksum length (%u), should be (2)", length );
+ return;
+ }
+
+ checksum = tvb_get_ntohs(tvb, offset);
+
+ /* the check_and_get_checksum() function needs to know how big
+ * the packet is. we can either pass through the pdu-len through several layers
+ * of dissectors and wrappers or extract the PDU length field from the PDU specific header
+ * which is offseted 17 bytes in IIHs (relative to the beginning of the IS-IS packet) */
+
+ pdu_length = tvb_get_ntohs(tvb, 17);
+
+ /* unlike the LSP checksum verification which starts at an offset of 12 we start at offset 0*/
+ switch (check_and_get_checksum(tvb, 0, pdu_length, checksum, offset, &cacl_checksum))
+ {
+
+ case NO_CKSUM :
+ proto_tree_add_text ( tree, tvb, offset, length,
+ "Checksum: 0x%04x (unused)", checksum);
+ break;
+ case DATA_MISSING :
+ isis_dissect_unknown(tvb, tree, offset,
+ "packet length %d went beyond packet",
+ tvb_length_remaining(tvb, 0));
+ break;
+ case CKSUM_NOT_OK :
+ proto_tree_add_text ( tree, tvb, offset, length,
+ "Checksum: 0x%04x (incorrect, should be 0x%04x)",
+ checksum,
+ cacl_checksum);
+ break;
+ case CKSUM_OK :
+ proto_tree_add_text ( tree, tvb, offset, length,
+ "Checksum: 0x%04x (correct)", checksum);
+ break;
+ default :
+ g_message("'check_and_get_checksum' returned an invalid value");
+ }
+ }
+}
+
+
+
+/*
+ * Name: dissect_hello_area_address_clv()
+ *
+ * Description:
+ * Decode for a hello packets area address clv.
+ * Calls into the CLV common one.
+ *
+ * Input:
+ * tvbuff_t * : tvbuffer for packet data
* proto_tree * : proto tree to build on (may be null)
+ * int : current offset into packet data
+ * int : length of IDs in packet.
+ * int : length of this clv
*
* Output:
* void, will modify proto_tree if not null.
*/
-static void
-dissect_hello_area_address_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree) {
- isis_dissect_area_address_clv(pd, offset, length, fd, tree );
+static void
+dissect_hello_area_address_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length _U_, int length)
+{
+ isis_dissect_area_address_clv(tvb, tree, offset, length);
+}
+
+
+
+static void
+dissect_hello_ptp_adj_clv(tvbuff_t *tvb,
+ proto_tree *tree, int offset, int id_length _U_, int length)
+{
+ static const value_string adj_state_vals[] = {
+ { 0, "Up" },
+ { 1, "Initializing" },
+ { 2, "Down" },
+ { 0, NULL }
+ };
+ guint8 adj_state;
+ char *adj_state_str;
+
+ adj_state = tvb_get_guint8(tvb, offset);
+ adj_state_str = val_to_str(adj_state, adj_state_vals, "Unknown (%u)");
+ switch(length) {
+ case 1:
+ proto_tree_add_text ( tree, tvb, offset, 1,
+ "Adjacency State: %s", adj_state_str );
+ break;
+ case 5:
+ proto_tree_add_text ( tree, tvb, offset, 1,
+ "Adjacency State: %s", adj_state_str );
+ proto_tree_add_text ( tree, tvb, offset+1, 4,
+ "Extended Local circuit ID: 0x%08x", tvb_get_ntohl(tvb, offset+1) );
+ break;
+ case 11:
+ proto_tree_add_text ( tree, tvb, offset, 1,
+ "Adjacency State: %s", adj_state_str );
+ proto_tree_add_text ( tree, tvb, offset+1, 4,
+ "Extended Local circuit ID: 0x%08x", tvb_get_ntohl(tvb, offset+1) );
+ proto_tree_add_text ( tree, tvb, offset+5, 6,
+ "Neighbor SystemID: %s", print_system_id( tvb_get_ptr(tvb, offset+5, 6), 6 ) );
+ break;
+ case 15:
+ proto_tree_add_text ( tree, tvb, offset, 1,
+ "Adjacency State: %s", adj_state_str );
+ proto_tree_add_text ( tree, tvb, offset+1, 4,
+ "Extended Local circuit ID: 0x%08x", tvb_get_ntohl(tvb, offset+1) );
+ proto_tree_add_text ( tree, tvb, offset+5, 6,
+ "Neighbor SystemID: %s", print_system_id( tvb_get_ptr(tvb, offset+5, 6), 6 ) );
+ proto_tree_add_text ( tree, tvb, offset+11, 4,
+ "Neighbor Extended Local circuit ID: 0x%08x", tvb_get_ntohl(tvb, offset+11) );
+ break;
+ default:
+ isis_dissect_unknown(tvb, tree, offset,
+ "malformed TLV (%d vs 1,5,11,15)", length );
+ return;
+ }
}
/*
* Name: isis_dissect_is_neighbors_clv()
- *
+ *
* Description:
* Take apart a IS neighbor packet. A neighbor is n 6 byte packets.
* (they tend to be an 802.3 MAC address, but its not required).
*
* Input:
- * u_char * : packet data
- * int : offset into packet data where we are.
- * guint : length of clv we are decoding
- * frame_data * : frame data (complete frame)
+ * tvbuff_t * : tvbuffer for packet data
* proto_tree * : protocol display tree to fill out. May be NULL
- * gint : tree id to use for proto tree.
- *
+ * int : offset into packet data where we are.
+ * int : length of IDs in packet.
+ * int : length of clv we are decoding
+ *
* Output:
* void, but we will add to proto tree if !NULL.
*/
-void
-dissect_hello_is_neighbors_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree ) {
+static void
+dissect_hello_is_neighbors_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
+ int id_length _U_, int length)
+{
while ( length > 0 ) {
if (length<6) {
- isis_dissect_unknown(offset, length, tree, fd,
+ isis_dissect_unknown(tvb, tree, offset,
"short is neighbor (%d vs 6)", length );
return;
}
- /*
+ /*
* Lets turn the area address into "standard" 0000.0000.etc
- * format string.
+ * format string.
*/
if ( tree ) {
- proto_tree_add_text ( tree, offset, 6,
- "IS Neighbor: %s", print_system_id( pd + offset, 6 ) );
+ proto_tree_add_text ( tree, tvb, offset, 6,
+ "IS Neighbor: %s", get_ether_name( tvb_get_ptr(tvb, offset, 6)) );
}
offset += 6;
length -= 6;
}
}
-
/*
* Name: dissect_hello_padding_clv()
*
* so we just return.
*
* Input:
- * u_char * : packet data
- * int : current offset into packet data
- * guint : length of this clv
- * frame_data * : frame data
+ * tvbuff_t * : tvbuffer for packet data
* proto_tree * : proto tree to build on (may be null)
+ * int : current offset into packet data
+ * int : length of IDs in packet.
+ * int : length of this clv
*
* Output:
* void
*/
-static void
-dissect_hello_padding_clv(const u_char *pd, int offset, guint length,
- frame_data *fd, proto_tree *tree) {
+static void
+dissect_hello_padding_clv(tvbuff_t *tvb _U_, proto_tree *tree _U_, int offset _U_,
+ int id_length _U_, int length _U_)
+{
/* nothing to do here! */
}
+
/*
* Name: isis_dissect_isis_hello()
- *
+ *
* Description:
* This procedure rips apart the various types of ISIS hellos. L1H and
- * L2H's are identicle for the most part, while the PTP hello has
+ * L2H's are identical for the most part, while the PTP hello has
* a shorter header.
*
* Input:
- * int : hello type, alla packet-isis.h ISIS_TYPE_* values
- * int : header length of packet.
- * u_char * : packet data
- * int offset : our offset into packet data.
- * frame_data * : frame data
+ * tvbuff_t * : tvbuffer for packet data
* proto_tree * : protocol display tree to add to. May be NULL.
+ * int offset : our offset into packet data.
+ * int : hello type, a la packet-isis.h ISIS_TYPE_* values
+ * int : header length of packet.
+ * int : length of IDs in packet.
*
* Output:
* void, will modify proto_tree if not NULL.
- */
-void
-isis_dissect_isis_hello(int hello_type, int header_length,
- const u_char *pd, int offset, frame_data *fd, proto_tree *tree){
- isis_hello_t *ihp;
+ */
+void
+isis_dissect_isis_hello(tvbuff_t *tvb, packet_info *pinfo, proto_tree *tree, int offset,
+ int hello_type, int header_length, int id_length)
+{
proto_item *ti;
proto_tree *hello_tree = NULL;
int len;
- int hlen;
-
- if (hello_type == ISIS_TYPE_PTP_HELLO) {
- hlen = sizeof(*ihp) - 6; /* make length correct */
- } else {
- hlen = sizeof(*ihp);
- }
-
- if (!BYTES_ARE_IN_FRAME(offset, hlen)) {
- isis_dissect_unknown(offset, hlen, tree, fd,
- "not enough capture data for header (%d vs %d)",
- hlen, END_OF_FRAME);
- return;
- }
-
- ihp = (isis_hello_t *) &pd[offset];
+ guint8 octet;
+ const guint8 *source_id;
+ guint16 pdu_length;
+ const guint8 *lan_id;
if (tree) {
- ti = proto_tree_add_item(tree, proto_isis_hello,
- offset, END_OF_FRAME, NULL);
+ ti = proto_tree_add_text(tree, tvb, offset, -1, "ISIS HELLO");
hello_tree = proto_item_add_subtree(ti, ett_isis_hello);
- proto_tree_add_uint_format(hello_tree,
+ octet = tvb_get_guint8(tvb, offset);
+ proto_tree_add_uint_format(hello_tree,
hf_isis_hello_circuit_reserved,
- offset, 1, ihp->isis_hello_circuit_reserved,
+ tvb, offset, 1, octet,
"Circuit type : %s, reserved(0x%02x == 0)",
- val_to_str(ihp->isis_hello_circuit,
+ val_to_str(octet&ISIS_HELLO_CTYPE_MASK,
isis_hello_circuit_type_vals,
"Unknown (0x%x)"),
- ihp->isis_hello_creserved
+ octet&ISIS_HELLO_CT_RESERVED_MASK
);
+ }
+ offset += 1;
- proto_tree_add_string_format(hello_tree, hf_isis_hello_lan_id,
- offset + 1, 6, ihp->isis_hello_source_id,
- "SystemID{ Sender of PDU } : %s",
- print_system_id( pd + offset + 1, 6 ) );
- proto_tree_add_item(hello_tree, hf_isis_hello_holding_timer,
- offset + 7, 2,pntohs(&ihp->isis_hello_holding_timer[0]));
- proto_tree_add_item(hello_tree, hf_isis_hello_pdu_length,
- offset + 9, 2,pntohs(&ihp->isis_hello_pdu_length[0]));
- proto_tree_add_uint_format(hello_tree, hf_isis_hello_priority_reserved,
- offset + 11, 1, ihp->isis_hello_priority_reserved,
- "Priority : %d, reserved(0x%02x == 0)",
- ihp->isis_hello_priority, ihp->isis_hello_preserved );
- if (hello_type == ISIS_TYPE_PTP_HELLO) {
- proto_tree_add_item(hello_tree, hf_isis_hello_local_circuit_id,
- offset + 12, 1, ihp->isis_hello_lan_id[0] );
- } else {
- proto_tree_add_string_format(hello_tree, hf_isis_hello_lan_id,
- offset + 12, 7, ihp->isis_hello_lan_id,
- "SystemID{ Designated IS } : %s",
- print_system_id( pd + offset + 12, 7 ) );
+ if (tree) {
+ source_id = tvb_get_ptr(tvb, offset, id_length);
+ proto_tree_add_bytes_format(hello_tree, hf_isis_hello_source_id, tvb,
+ offset, id_length, source_id,
+ "System-ID {Sender of PDU} : %s",
+ print_system_id( source_id, id_length ) );
+ }
+ if (check_col(pinfo->cinfo, COL_INFO)) {
+ col_append_fstr(pinfo->cinfo, COL_INFO, ", System-ID: %s",
+ print_system_id( tvb_get_ptr(tvb, offset, id_length), id_length ) );
+ }
+ offset += id_length;
+
+ if (tree) {
+ proto_tree_add_item(hello_tree, hf_isis_hello_holding_timer, tvb,
+ offset, 2, FALSE);
+ }
+ offset += 2;
+
+ pdu_length = tvb_get_ntohs(tvb, offset);
+ if (tree) {
+ proto_tree_add_uint(hello_tree, hf_isis_hello_pdu_length, tvb,
+ offset, 2, pdu_length);
+ }
+ offset += 2;
+
+ if (hello_type == ISIS_TYPE_PTP_HELLO) {
+ if (tree) {
+ proto_tree_add_item(hello_tree, hf_isis_hello_local_circuit_id, tvb,
+ offset, 1, FALSE );
+ }
+ offset += 1;
+ } else {
+ if (tree) {
+ octet = tvb_get_guint8(tvb, offset);
+ proto_tree_add_uint_format(hello_tree, hf_isis_hello_priority_reserved, tvb,
+ offset, 1, octet,
+ "Priority : %d, reserved(0x%02x == 0)",
+ octet&ISIS_HELLO_PRIORITY_MASK,
+ octet&ISIS_HELLO_P_RESERVED_MASK );
}
+ offset += 1;
+
+ if (tree) {
+ lan_id = tvb_get_ptr(tvb, offset, id_length+1);
+ proto_tree_add_bytes_format(hello_tree, hf_isis_hello_lan_id, tvb,
+ offset, id_length + 1, lan_id,
+ "System-ID {Designated IS} : %s",
+ print_system_id( lan_id, id_length + 1 ) );
+ }
+ offset += id_length + 1;
}
- offset += hlen;
- len = pntohs(&ihp->isis_hello_pdu_length[0]);
+ len = pdu_length;
len -= header_length;
if (len < 0) {
- isis_dissect_unknown(offset, header_length, tree, fd,
- "packet header length %d went beyond packet",
+ isis_dissect_unknown(tvb, tree, offset,
+ "Packet header length %d went beyond packet",
header_length );
return;
}
* our list of valid ones!
*/
if (hello_type == ISIS_TYPE_L1_HELLO){
- isis_dissect_clvs ( clv_l1_hello_opts, len, pd, offset, fd,
- hello_tree, ett_isis_hello_clv_unknown );
+ isis_dissect_clvs(tvb, hello_tree, offset,
+ clv_l1_hello_opts, len, id_length,
+ ett_isis_hello_clv_unknown);
} else if (hello_type == ISIS_TYPE_L2_HELLO) {
- isis_dissect_clvs ( clv_l2_hello_opts, len, pd, offset, fd,
- hello_tree, ett_isis_hello_clv_unknown );
+ isis_dissect_clvs(tvb, hello_tree, offset,
+ clv_l2_hello_opts, len, id_length,
+ ett_isis_hello_clv_unknown);
} else {
- isis_dissect_clvs ( clv_ptp_hello_opts, len, pd, offset, fd,
- hello_tree, ett_isis_hello_clv_unknown );
+ isis_dissect_clvs(tvb, hello_tree, offset,
+ clv_ptp_hello_opts, len, id_length,
+ ett_isis_hello_clv_unknown);
}
}
/*
- * Name: proto_register_isis_hello()
+ * Name: isis_register_hello()
*
* Description:
* Register our protocol sub-sets with protocol manager.
- * NOTE: this procedure is autolinked by the makefile process that
- * builds register.c
*
- * Input:
- * void
+ * Input:
+ * int : protocol index for the ISIS protocol
*
* Output:
* void
*/
void
-proto_register_isis_hello(void) {
+isis_register_hello(int proto_isis) {
static hf_register_info hf[] = {
{ &hf_isis_hello_circuit_reserved,
- { "Circuit type ", "isis_hello.circuite_type",
- FT_UINT8, BASE_HEX, NULL, 0x0, "" }},
+ { "Circuit type ", "isis.hello.circuit_type",
+ FT_UINT8, BASE_HEX, NULL, 0x0, "", HFILL }},
{ &hf_isis_hello_source_id,
- { "SystemID{ Sender of PDU } ", "isis_hello.source_id",
- FT_ETHER, BASE_HEX, NULL, 0x0, "" }},
+ { "SystemID{ Sender of PDU } ", "isis.hello.source_id",
+ FT_BYTES, BASE_HEX, NULL, 0x0, "", HFILL }},
{ &hf_isis_hello_holding_timer,
- { "Holding timer ", "isis_hello.holding_timer",
- FT_UINT16, BASE_DEC, NULL, 0x0, "" }},
+ { "Holding timer ", "isis.hello.holding_timer",
+ FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_isis_hello_pdu_length,
- { "PDU length ", "isis_hello.pdu_length",
- FT_UINT16, BASE_DEC, NULL, 0x0, "" }},
+ { "PDU length ", "isis.hello.pdu_length",
+ FT_UINT16, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_isis_hello_priority_reserved,
- { "Priority ", "isis_hello.priority",FT_UINT8, BASE_DEC, NULL,
- ISIS_HELLO_P_RESERVED_MASK, "" }},
+ { "Priority ", "isis.hello.priority",
+ FT_UINT8, BASE_DEC, NULL, ISIS_HELLO_P_RESERVED_MASK, "", HFILL }},
{ &hf_isis_hello_lan_id,
- { "SystemID{ Designated IS } ", "isis_hello.lan_id", FT_STRING, BASE_DEC, NULL,
- 0x0, "" }},
+ { "SystemID{ Designated IS } ", "isis.hello.lan_id",
+ FT_BYTES, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_isis_hello_local_circuit_id,
- { "Local circuit ID ", "isis_hello.local_circuit_id", FT_UINT8,
- BASE_DEC, NULL, 0x0, "" }},
+ { "Local circuit ID ", "isis.hello.local_circuit_id",
+ FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
{ &hf_isis_hello_clv_ipv4_int_addr,
- { "IPv4 interface address ", "isis_hello.clv_ipv4_int_addr", FT_IPv4,
- BASE_NONE, NULL, 0x0, "" }},
+ { "IPv4 interface address ", "isis.hello.clv_ipv4_int_addr",
+ FT_IPv4, BASE_NONE, NULL, 0x0, "", HFILL }},
+
+ { &hf_isis_hello_clv_ipv6_int_addr,
+ { "IPv6 interface address ", "isis.hello.clv_ipv6_int_addr",
+ FT_IPv6, BASE_NONE, NULL, 0x0, "", HFILL }},
+ { &hf_isis_hello_clv_ptp_adj,
+ { "Point-to-point Adjacency ", "isis.hello.clv_ptp_adj",
+ FT_UINT8, BASE_DEC, NULL, 0x0, "", HFILL }},
+
+ { &hf_isis_hello_clv_mt,
+ { "MT-ID ", "isis.hello.clv_mt",
+ FT_UINT16, BASE_HEX, NULL, 0x0, "", HFILL }},
};
static gint *ett[] = {
&ett_isis_hello,
&ett_isis_hello_clv_padding,
&ett_isis_hello_clv_unknown,
&ett_isis_hello_clv_nlpid,
- &ett_isis_hello_clv_auth,
+ &ett_isis_hello_clv_authentication,
+ &ett_isis_hello_clv_ip_authentication,
&ett_isis_hello_clv_ipv4_int_addr,
+ &ett_isis_hello_clv_ipv6_int_addr,
+ &ett_isis_hello_clv_ptp_adj,
+ &ett_isis_hello_clv_mt,
+ &ett_isis_hello_clv_restart,
+ &ett_isis_hello_clv_checksum
};
- proto_isis_hello = proto_register_protocol("ISIS HELLO", "isis_hello");
- proto_register_field_array(proto_isis_hello, hf, array_length(hf));
+ proto_register_field_array(proto_isis, hf, array_length(hf));
proto_register_subtree_array(ett, array_length(ett));
}
-
git.samba.org / obnox / wireshark / wip.git / blobdiff