/* packet-isis-clv.c
* Common CLV decode routines.
*
- * $Id: packet-isis-clv.c,v 1.8 2000/08/11 13:35:17 deniel Exp $
+ * $Id: packet-isis-clv.c,v 1.19 2002/04/07 23:39:00 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
* 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 "snprintf.h"
#endif
-#include "packet.h"
+#include <epan/packet.h>
#include "packet-osi.h"
#include "packet-isis.h"
#include "packet-isis-clv.h"
+#include "nlpid.h"
/*
* CLV is n, x byte hex strings.
*
* 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
+ * 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.
*/
void
-isis_dissect_area_address_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree ) {
+isis_dissect_area_address_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
+ int length)
+{
char *sbuf;
int mylen;
while ( length > 0 ) {
- mylen = pd[offset];
+ mylen = tvb_get_guint8(tvb, offset);
length--;
if (length<=0) {
- isis_dissect_unknown( offset, length, tree, fd,
+ isis_dissect_unknown(tvb, tree, offset,
"short address (no length for payload)");
return;
}
if ( mylen > length) {
- isis_dissect_unknown(offset, length, tree, fd,
+ isis_dissect_unknown(tvb, tree, offset,
"short address, packet say %d, we have %d left",
mylen, length );
return;
* Lets turn the area address into "standard" 0000.0000.etc
* format string.
*/
-/* sbuf = isis_address_to_string ( pd, offset + 1, mylen );*/
- sbuf = print_nsap_net( pd + offset + 1, mylen );
+/* sbuf = isis_address_to_string ( tvb, offset + 1, mylen );*/
+ sbuf = print_nsap_net( tvb_get_ptr(tvb, offset + 1, mylen), mylen );
/* and spit it out */
if ( tree ) {
- proto_tree_add_text ( tree, NullTVB, offset, mylen + 1,
+ proto_tree_add_text ( tree, tvb, offset, mylen + 1,
"Area address (%d): %s", mylen, sbuf );
}
offset += mylen + 1;
* use to name this.
*
* 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
+ * int : offset into packet data where we are.
+ * int : length of clv we are decoding
* char * : Password meaning
*
* Output:
* void, but we will add to proto tree if !NULL.
*/
void
-isis_dissect_authentication_clv(const u_char *pd, int offset, guint length,
- frame_data *fd, proto_tree *tree, char *meaning) {
+isis_dissect_authentication_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
+ int length, char *meaning)
+{
u_char pw_type;
char sbuf[300]; /* 255 + header info area */
char *s = sbuf;
- int use_cleartext;
+ int auth_unsupported;
if ( length <= 0 ) {
return;
}
- pw_type = pd[offset++];
+ pw_type = tvb_get_guint8(tvb, offset);
+ offset += 1;
length--;
- use_cleartext = FALSE;
+ auth_unsupported = FALSE;
+
switch (pw_type) {
case 1:
- s += sprintf ( s, "type 1, clear text" );
- use_cleartext = TRUE;
+ s += sprintf ( s, "clear text (1), password (length %d) = ", length );
+
+ if ( length > 0 ) {
+ strncpy(s, tvb_get_ptr(tvb, offset, length), length);
+ s[length] = 0;
+ } else {
+ strcat(s, "no clear-text password found!!!" );
+ }
+ break;
+ case 54:
+ s += sprintf ( s, "hmac-md5 (54), password (length %d) = ", length );
+
+ if ( length == 16 ) {
+ s += sprintf ( s, "0x%02x", tvb_get_guint8(tvb, offset) );
+ offset += 1;
+ length--;
+ while (length > 0) {
+ s += sprintf ( s, "%02x", tvb_get_guint8(tvb, offset) );
+ offset += 1;
+ length--;
+ }
+ s = 0;
+ } else {
+ strcat(s, "illegal hmac-md5 digest format (must be 16 bytes)" );
+ }
break;
default:
- s += sprintf ( s, "type 0x%02x, (must be 1)", pw_type );
+ s += sprintf ( s, "type 0x%02x (0x%02x): ", pw_type, length );
+ auth_unsupported=TRUE;
break;
}
- s += sprintf ( s, " (0x%02x): ", length );
-
- if ( use_cleartext ) {
- if ( length > 0 ) {
- strncpy(s, &pd[offset], length);
- /* null terminate */
- s[length] = 0;
- } else {
- strcat(s, "<<no password found!!!>>" );
- }
- /* NOTE, s no longer valid */
- }
- proto_tree_add_text ( tree, NullTVB, offset - 1, length + 1,
+ proto_tree_add_text ( tree, tvb, offset - 1, length + 1,
"%s %s", meaning, sbuf );
- if ( !use_cleartext ) {
- if ( length ) {
- isis_dissect_unknown(offset, length, tree, fd,
- "Unknown autheticion type" );
+
+ if ( auth_unsupported ) {
+ isis_dissect_unknown(tvb, tree, offset,
+ "Unknown authentication type" );
+ }
+}
+
+/*
+ * Name: isis_dissect_hostname_clv()
+ *
+ * Description:
+ * dump the hostname information found in TLV 137
+ * pls note that the hostname is not null terminated
+ *
+ * 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.
+ */
+
+
+void
+isis_dissect_hostname_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
+ int length)
+{
+ if ( !tree ) return; /* nothing to do! */
+
+ if ( length == 0 ) {
+ proto_tree_add_text ( tree, tvb, offset, length,
+ "Hostname: --none--" );
+ } else {
+ proto_tree_add_text ( tree, tvb, offset, length,
+ "Hostname: %.*s", length,
+ tvb_get_ptr(tvb, offset, length) );
+ }
+}
+
+
+
+
+void
+isis_dissect_mt_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int length,
+ int tree_id)
+{
+ guint16 mt_block;
+ char mt_desc[60];
+
+ while (length>0) {
+ /* length can only be a multiple of 2, otherwise there is
+ something broken -> so decode down until length is 1 */
+ if (length!=1) {
+ /* fetch two bytes */
+ mt_block=tvb_get_ntohs(tvb, offset);
+
+ /* mask out the lower 12 bits */
+ switch(mt_block&0x0fff) {
+ case 0:
+ strcpy(mt_desc,"IPv4 unicast");
+ break;
+ case 1:
+ strcpy(mt_desc,"In-Band Management");
+ break;
+ case 2:
+ strcpy(mt_desc,"IPv6 unicast");
+ break;
+ case 3:
+ strcpy(mt_desc,"Multicast");
+ break;
+ case 4095:
+ strcpy(mt_desc,"Development, Experimental or Proprietary");
+ break;
+ default:
+ strcpy(mt_desc,"Reserved for IETF Consensus");
+ break;
}
+ proto_tree_add_uint_format ( tree, tree_id, tvb, offset, 2,
+ mt_block,
+ "%s Topology (0x%03x)%s%s",
+ mt_desc,
+ mt_block&0xfff,
+ (mt_block&0x8000) ? "" : ", no sub-TLVs present",
+ (mt_block&0x4000) ? ", ATT bit set" : "" );
+ } else {
+ proto_tree_add_text ( tree, tvb, offset, 1,
+ "malformed MT-ID");
+ break;
+ }
+ length=length-2;
+ offset=offset+2;
}
}
+
+
/*
* Name: isis_dissect_ip_int_clv()
*
* addresses, plain and simple.
*
* 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 clv we are decoding
+ * int : tree id to use for proto tree.
*
* Output:
* void, but we will add to proto tree if !NULL.
*/
void
-isis_dissect_ip_int_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree, gint tree_id ) {
- guint32 addr;
+isis_dissect_ip_int_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
+ int length, int tree_id)
+{
if ( length <= 0 ) {
return;
}
while ( length > 0 ) {
if ( length < 4 ) {
- isis_dissect_unknown(offset, length, tree, fd,
+ isis_dissect_unknown(tvb, tree, offset,
"Short ip interface address (%d vs 4)",length );
return;
}
- memcpy(&addr, &pd[offset], sizeof(addr));
+
if ( tree ) {
- proto_tree_add_ipv4(tree, tree_id, NullTVB, offset, 4, addr);
+ proto_tree_add_item(tree, tree_id, tvb, offset, 4, FALSE);
}
offset += 4;
length -= 4;
}
}
+/*
+ * Name: isis_dissect_ipv6_int_clv()
+ *
+ * Description:
+ * Take apart the CLV that lists all the IPv6 interfaces. The
+ * meaning of which is slightly different for the different base packet
+ * types, but the display is not different. What we have is n ip
+ * addresses, plain and simple.
+ *
+ * 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
+ * int : tree id to use for proto tree.
+ *
+ * Output:
+ * void, but we will add to proto tree if !NULL.
+ */
+void
+isis_dissect_ipv6_int_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
+ int length, int tree_id)
+{
+ guint8 addr [16];
+
+ if ( length <= 0 ) {
+ return;
+ }
+
+ while ( length > 0 ) {
+ if ( length < 16 ) {
+ isis_dissect_unknown(tvb, tree, offset,
+ "Short IPv6 interface address (%d vs 16)",length );
+ return;
+ }
+ tvb_memcpy(tvb, addr, offset, sizeof(addr));
+ if ( tree ) {
+ proto_tree_add_ipv6(tree, tree_id, tvb, offset, 16, addr);
+ }
+ offset += 16;
+ length -= 16;
+ }
+}
+
+
+/*
+ * Name: isis_dissect_te_router_id_clv()
+ *
+ * Description:
+ * Display the Traffic Engineering Router ID TLV #134.
+ * This TLV is like the IP Interface TLV, except that
+ * only _one_ IP address is present
+ *
+ * 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
+ * int : tree id to use for proto tree.
+ *
+ * Output:
+ * void, but we will add to proto tree if !NULL.
+ */
+void
+isis_dissect_te_router_id_clv(tvbuff_t *tvb, proto_tree *tree, int offset,
+ int length, int tree_id)
+{
+ if ( length <= 0 ) {
+ return;
+ }
+
+ if ( length != 4 ) {
+ isis_dissect_unknown(tvb, tree, offset,
+ "malformed Traffic Engineering Router ID (%d vs 4)",length );
+ return;
+ }
+ if ( tree ) {
+ proto_tree_add_item(tree, tree_id, tvb, offset, 4, FALSE);
+ }
+}
+
/*
* Name: isis_dissect_nlpid_clv()
*
* plus 1 for zero termination. We just just 256*6 for simplicity.
*
* 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
+ * 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.
*/
void
-isis_dissect_nlpid_clv(const u_char *pd, int offset,
- guint length, frame_data *fd, proto_tree *tree ) {
+isis_dissect_nlpid_clv(tvbuff_t *tvb, proto_tree *tree, int offset, int length)
+{
char sbuf[256*6];
char *s = sbuf;
int hlen = length;
while ( length-- > 0 ) {
if (s != sbuf ) {
- s += sprintf ( s, ", " );
- }
- s += sprintf ( s, "0x%02x", pd[offset++] );
+ s += sprintf ( s, ", " );
+ }
+ s += sprintf ( s, "%s (0x%02x)",
+ val_to_str(tvb_get_guint8(tvb, offset), nlpid_vals,
+ "Unknown"), tvb_get_guint8(tvb, offset));
+ offset++;
}
+
if ( hlen == 0 ) {
sprintf ( sbuf, "--none--" );
}
- proto_tree_add_text ( tree, NullTVB, old_offset, hlen,
- "NLPID: %s", sbuf );
+ proto_tree_add_text ( tree, tvb, old_offset, hlen,
+ "NLPID(s): %s", sbuf );
}
/*
* search the passed in valid clv's for this protocol (opts) for
* a matching code. If found, we add to the display tree and
* then call the dissector. If it is not, we just post an
- * "unknown" clv entrie using the passed in unknown clv tree id.
+ * "unknown" clv entry using the passed in unknown clv tree id.
*
* 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.
* isis_clv_handle_t * : NULL dissector terminated array of codes
* and handlers (along with tree text and tree id's).
* int : length of CLV area.
- * 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)
- * proto_tree * : protocol display tree to fill out. May be NULL
- * gint : unknown clv tree id
+ * int : length of IDs in packet.
+ * int : unknown clv tree id
*
* Output:
* void, but we will add to proto tree if !NULL.
*/
void
-isis_dissect_clvs(const isis_clv_handle_t *opts, int len, int id_length,
- const u_char *pd, int offset, frame_data *fd, proto_tree *tree,
- gint unknown_tree_id ) {
+isis_dissect_clvs(tvbuff_t *tvb, proto_tree *tree, int offset,
+ const isis_clv_handle_t *opts, int len, int id_length,
+ int unknown_tree_id)
+{
guint8 code;
guint8 length;
int q;
int adj;
while ( len > 0 ) {
- code = pd[offset++];
- length = pd[offset++];
+ code = tvb_get_guint8(tvb, offset);
+ offset += 1;
+
+ length = tvb_get_guint8(tvb, offset);
+ offset += 1;
+
adj = (sizeof(code) + sizeof(length) + length);
len -= adj;
- if ( len < 0 || !BYTES_ARE_IN_FRAME(offset, length) ) {
- isis_dissect_unknown(offset, adj, tree, fd,
+ if ( len < 0 ) {
+ isis_dissect_unknown(tvb, tree, offset,
"Short CLV header (%d vs %d)",
adj, len + adj );
return;
/* adjust by 2 for code/len octets */
snprintf ( sbuf, sizeof(sbuf), "%s (%d)",
opts[q].tree_text, length );
- ti = proto_tree_add_text(tree, NullTVB, offset - 2,
+ ti = proto_tree_add_text(tree, tvb, offset - 2,
length + 2, sbuf);
clv_tree = proto_item_add_subtree(ti,
*opts[q].tree_id );
} else {
clv_tree = NULL;
}
- opts[q].dissect(pd, offset, length, id_length, fd,
- clv_tree );
+ opts[q].dissect(tvb, clv_tree, offset,
+ id_length, length);
} else {
if (tree) {
snprintf ( sbuf, sizeof(sbuf),
"Unknown code (%d:%d)", code, length );
- ti = proto_tree_add_text(tree, NullTVB, offset - 2,
+ ti = proto_tree_add_text(tree, tvb, offset - 2,
length + 2, sbuf);
clv_tree = proto_item_add_subtree(ti,
unknown_tree_id );
offset += length;
}
}
+
git.samba.org / obnox / wireshark / wip.git / blobdiff