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wireshark/packet-osi-options.c
Guy Harris 64a43e1c0e Fixes to Lemon to get it to compile on platforms (such as some versions 
of Tru64 UNIX) that define TRUE and FALSE.

Fixes to some Tru64 compiler warnings.

svn path=/trunk/; revision=3120
2001-03-09 04:35:25 +00:00

476 lines
17 KiB
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/* packet-osi-options.c
* Routines for the decode of ISO/OSI option part
* Covers:
* ISO 8473 CLNP (ConnectionLess Mode Network Service Protocol)
* ISO 10589 ISIS (Intradomain Routeing Information Exchange Protocol)
* ISO 9542 ESIS (End System To Intermediate System Routeing Exchange Protocol)
*
* $Id: packet-osi-options.c,v 1.6 2001/03/09 04:35:22 guy Exp $
* Ralf Schneider <Ralf.Schneider@t-online.de>
*
* 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
#include <stdio.h>
#include <string.h>
#include <glib.h>
#include "packet.h"
#include "nlpid.h"
#include "packet-osi.h"
#include "packet-isis.h"
#include "packet-isis-clv.h"
#include "packet-isis-hello.h"
#include "packet-isis-lsp.h"
#include "packet-isis-snp.h"
#include "packet-esis.h"
#include "packet-osi-options.h"
#define OSI_OPT_SECURITY 0xc5
#define OSI_OPT_QOS_MAINTANANCE 0xc3
#define OSI_OPT_PRIORITY 0xcd
#define OSI_OPT_ADDRESS_MASK 0xe1
#define OSI_OPT_SNPA_MASK 0xe2
#define OSI_OPT_ES_CONFIG_TIMER 0xc6
#define OSI_OPT_MAX_PRIORITY 0x0e
#define OSI_OPT_PADDING 0xcc
#define OSI_OPT_SOURCE_ROUTING 0xc8
#define OSI_OPT_RECORD_OF_ROUTE 0xcb
#define OSI_OPT_REASON_OF_DISCARD 0xc1
#define OSI_OPT_SEC_MASK 0xc0
#define OSI_OPT_SEC_RESERVED 0x00
#define OSI_OPT_SEC_SRC_ADR_SPEC 0x40
#define OSI_OPT_SEC_DST_ADR_SPEC 0x80
#define OSI_OPT_SEC_GLOBAL_UNIQUE 0xc0
#define OSI_OPT_QOS_MASK 0xc0
#define OSI_OPT_QOS_RESERVED 0x00
#define OSI_OPT_QOS_SRC_ADR_SPEC 0x40
#define OSI_OPT_QOS_DST_ADR_SPEC 0x80
#define OSI_OPT_QOS_GLOBAL_UNIQUE 0xc0
#define OSI_OPT_QOS_SUB_MASK 0x3f
#define OSI_OPT_QOS_SUB_RSVD 0x20
#define OSI_OPT_QOS_SUB_SEQ_VS_TRS 0x10
#define OSI_OPT_QOS_SUB_CONG_EXPED 0x08
#define OSI_OPT_QOS_SUB_TSD_VS_COST 0x04
#define OSI_OPT_QOS_SUB_RESERR_TRS 0x02
#define OSI_OPT_QOS_SUB_RESERR_COST 0x01
#define OSI_OPT_RFD_GENERAL 0x00
#define OSI_OPT_RFD_ADDRESS 0x80
#define OSI_OPT_RFD_SOURCE_ROUTEING 0x90
#define OSI_OPT_RFD_LIFETIME 0xa0
#define OSI_OPT_RFD_PDU_DISCARDED 0xb0
#define OSI_OPT_RFD_REASSEMBLY 0xc0
#define OSI_OPT_RFD_MASK 0xf0
#define OSI_OPT_RFD_SUB_MASK 0x0f
static gint ott_osi_options = -1;
static gint ott_osi_qos = -1;
static gint ott_osi_route = -1;
static gint ott_osi_redirect = -1;
static const value_string osi_opt_sec_vals[] = {
{ OSI_OPT_SEC_RESERVED, "Reserved"},
{ OSI_OPT_SEC_SRC_ADR_SPEC, "Source Address Specific"},
{ OSI_OPT_SEC_DST_ADR_SPEC, "Destination Address Specific"},
{ OSI_OPT_SEC_GLOBAL_UNIQUE, "Globally Unique"},
{ 0, NULL} };
static const value_string osi_opt_qos_vals[] = {
{ OSI_OPT_QOS_RESERVED, "Reserved"},
{ OSI_OPT_QOS_SRC_ADR_SPEC, "Source Address Specific"},
{ OSI_OPT_QOS_DST_ADR_SPEC, "Destination Address Specific"},
{ OSI_OPT_QOS_GLOBAL_UNIQUE, "Globally Unique"},
{ 0, NULL} };
static const value_string osi_opt_qos_sub_vals[] = {
{ 0x20, " xx10 0000 Reserved"},
{ 0x10, " xx01 0000 Sequencing versus transit delay"},
{ 0x08, " xx00 1000 Congestion experienced"},
{ 0x04, " xx00 0100 Transit delay versus cost"},
{ 0x02, " xx00 0010 Residual error probability versus transit delay"},
{ 0x01, " xx00 0001 Residual error probability versus cost"},
{ 0, NULL} };
static const value_string osi_opt_rfd_general[] = {
{ 0x00, "Reason not specified"},
{ 0x01, "Protocol procedure error"},
{ 0x02, "Incorrect checksum"},
{ 0x03, "PDU discarded due to congestion"},
{ 0x04, "Header syntax error ( cannot be parsed )"},
{ 0x05, "Segmentation needed but not permitted"},
{ 0x06, "Incomplete PDU received"},
{ 0x07, "Duplicate option"},
{ 0, NULL} };
static const value_string osi_opt_rfd_address[] = {
{ 0x00, "Destination Address unreachable"},
{ 0x01, "Destination Address unknown"},
{ 0, NULL} };
static const value_string osi_opt_rfd_src_route[] = {
{ 0x00, "Unspecified source routeing error"},
{ 0x01, "Syntax error in source routeing field"},
{ 0x02, "Unknown address in source routeing field"},
{ 0x03, "Path not acceptable"},
{ 0, NULL} };
static const value_string osi_opt_rfd_lifetime[] = {
{ 0x00, "Lifetime expired while data unit in transit"},
{ 0x01, "Lifetime expired during reassembly"},
{ 0, NULL} };
static const value_string osi_opt_rfd_discarded[] = {
{ 0x00, "Unsupported option not specified"},
{ 0x01, "Unsupported protocol version"},
{ 0x02, "Unsupported security option"},
{ 0x03, "Unsupported source routeing option"},
{ 0x04, "Unsupported recording of route option"},
{ 0, NULL} };
static const value_string osi_opt_rfd_reassembly[] = {
{ 0x00, "Reassembly interference"},
{ 0, NULL} };
void
dissect_option_qos( const u_char type, const u_char sub_type, int offset,
u_char len, tvbuff_t *tvb, proto_tree *tree ) {
u_char tmp_type = 0;
proto_item *ti;
proto_tree *osi_qos_tree = NULL;
ti = proto_tree_add_text( tree, NullTVB, offset, len,
"Quality of service maintenance: %s",
val_to_str( type, osi_opt_qos_vals, "Unknown (0x%x)") );
osi_qos_tree = proto_item_add_subtree( ti, ott_osi_qos );
if ( OSI_OPT_SEC_MASK == type ) { /* Analye BIT field to get all Values */
tmp_type = sub_type & OSI_OPT_QOS_SUB_RSVD;
if ( tmp_type ) {
proto_tree_add_text( osi_qos_tree, NullTVB, offset, len,
val_to_str( tmp_type, osi_opt_qos_sub_vals, "Unknown (0x%x)") );
}
tmp_type = sub_type & OSI_OPT_QOS_SUB_SEQ_VS_TRS;
if ( tmp_type ) {
proto_tree_add_text( osi_qos_tree, NullTVB, offset, len,
val_to_str( tmp_type, osi_opt_qos_sub_vals, "Unknown (0x%x)") );
}
tmp_type = sub_type &OSI_OPT_QOS_SUB_CONG_EXPED;
if ( tmp_type ) {
proto_tree_add_text( osi_qos_tree, NullTVB, offset, len,
val_to_str( tmp_type, osi_opt_qos_sub_vals, "Unknown (0x%x)") );
}
tmp_type = sub_type & OSI_OPT_QOS_SUB_TSD_VS_COST;
if ( tmp_type ) {
proto_tree_add_text( osi_qos_tree, NullTVB, offset, len,
val_to_str( tmp_type, osi_opt_qos_sub_vals, "Unknown (0x%x)") );
}
tmp_type = sub_type & OSI_OPT_QOS_SUB_RESERR_TRS;
if ( tmp_type ) {
proto_tree_add_text( osi_qos_tree, NullTVB, offset, len,
val_to_str( tmp_type, osi_opt_qos_sub_vals, "Unknown (0x%x)") );
}
tmp_type = sub_type & OSI_OPT_QOS_SUB_RESERR_COST;
if ( tmp_type ) {
proto_tree_add_text( osi_qos_tree, NullTVB, offset, len,
val_to_str( tmp_type, osi_opt_qos_sub_vals, "Unknown (0x%x)") );
}
}
}
void
dissect_option_route( u_char parm_type, u_char offset, u_char parm_len,
tvbuff_t *tvb, proto_tree *tree ) {
u_char next_hop = 0;
u_char this_hop = 0;
u_char netl = 0;
u_char last_hop = 0;
u_char cnt_hops = 0;
proto_item *ti;
proto_tree *osi_route_tree = NULL;
static const value_string osi_opt_route[] = {
{ 0x03, "No Network Entity Titles Recorded Yet"},
{ 0xff, "Recording Terminated !"},
{ 0, NULL} };
if ( parm_type == OSI_OPT_SOURCE_ROUTING ) {
next_hop = tvb_get_guint8(tvb, offset + 1 );
netl = tvb_get_guint8(tvb, next_hop + 2 );
this_hop = offset + 3; /* points to first netl */
ti = proto_tree_add_text( tree, tvb, offset + next_hop, netl,
"Source Routing: %s ( Next Hop Highlighted In Data Buffer )",
(tvb_get_guint8(tvb, offset) == 0) ? "Partial Source Routeing" :
"Complete Source Routeing" );
}
else {
last_hop = tvb_get_guint8(tvb, offset + 1 );
/* points to the end of the list */
netl = tvb_get_guint8(tvb, last_hop );
/* mis-used to highlight buffer */
ti = proto_tree_add_text( tree, tvb, offset + next_hop, netl,
"Record of Route: %s : %s",
(tvb_get_guint8(tvb, offset) == 0) ? "Partial Source Routeing" :
"Complete Source Routeing" ,
val_to_str( last_hop, osi_opt_route, "Unknown (0x%x" ) );
if ( 255 == last_hop )
this_hop = parm_len + 1; /* recording terminated, nothing to show */
else
this_hop = offset + 3;
}
osi_route_tree = proto_item_add_subtree( ti, ott_osi_route );
while ( this_hop < parm_len ) {
netl = tvb_get_guint8(tvb, this_hop + 1);
proto_tree_add_text( osi_route_tree, tvb, offset + this_hop, netl,
"Hop #%3u NETL: %2u, NET: %s",
cnt_hops++,
netl,
print_nsap_net( tvb_get_ptr(tvb, this_hop + 1, netl), netl ) );
this_hop += 1 + netl;
}
}
void
dissect_option_rfd( const u_char error, const u_char field, u_char offset,
u_char len, tvbuff_t *tvb, proto_tree *tree ) {
u_char error_class = 0;
char *format_string[] =
{ "Reason for discard {General} : %s, in field %u",
"Reason for discard {Address} : %s, in field %u",
"Reason for discard {Source Routeing}: %s, in field %u",
"Reason for discard {Lifetime} : %s, in field %u",
"Reason for discard {PDU discarded} : %s, in field %u",
"Reason for discard {Reassembly} : %s, in field %u"
};
error_class = error & OSI_OPT_RFD_MASK;
if ( OSI_OPT_RFD_GENERAL == error_class ) {
proto_tree_add_text( tree, tvb, offset + field, 1, format_string[0],
val_to_str( error & OSI_OPT_RFD_SUB_MASK,
osi_opt_rfd_general, "Unknown (0x%x)"), field );
}
else if ( OSI_OPT_RFD_ADDRESS == error_class ) {
proto_tree_add_text( tree, tvb, offset + field, 1, format_string[1],
val_to_str( error & OSI_OPT_RFD_SUB_MASK,
osi_opt_rfd_address, "Unknown (0x%x)"), field );
}
else if ( OSI_OPT_RFD_SOURCE_ROUTEING == error_class ) {
proto_tree_add_text( tree, tvb, offset + field, 1, format_string[2],
val_to_str( error & OSI_OPT_RFD_SUB_MASK,
osi_opt_rfd_src_route, "Unknown (0x%x)"), field );
}
else if ( OSI_OPT_RFD_LIFETIME == error_class ) {
proto_tree_add_text( tree, tvb, offset + field, 1, format_string[3],
val_to_str( error & OSI_OPT_RFD_SUB_MASK,
osi_opt_rfd_lifetime, "Unknown (0x%x)"), field );
}
else if ( OSI_OPT_RFD_PDU_DISCARDED == error_class ) {
proto_tree_add_text( tree, tvb, offset + field, 1, format_string[4],
val_to_str( error & OSI_OPT_RFD_SUB_MASK,
osi_opt_rfd_discarded, "Unknown (0x%x)"), field );
}
else if ( OSI_OPT_RFD_REASSEMBLY == error_class ) {
proto_tree_add_text( tree, tvb, offset + field, 1, format_string[5],
val_to_str( error & OSI_OPT_RFD_SUB_MASK,
osi_opt_rfd_reassembly, "Unknown (0x%x)"), field );
}
else {
proto_tree_add_text( tree, tvb, offset, len,
"Reason for discard: UNKNOWN Error Class" );
}
}
/* ############################## Dissection Functions ###################### */
/*
* Name: dissect_osi_options()
*
* Description:
* Main entry area for esis de-mangling. This will build the
* main esis tree data and call the sub-protocols as needed.
*
* Input:
* u_char : PDU type to check if option is allowed or not
* u_char : length of option section
* u_char * : packet data
* int : offset into packet where we are (packet_data[offset]== start
* of what we care about)
* frame_data * : frame data (whole packet with extra info)
* proto_tree * : tree of display data. May be NULL.
*
* Output:
* void, but we will add to the proto_tree if it is not NULL.
*/
void
dissect_osi_options( u_char pdu_type, u_char opt_len, tvbuff_t *tvb,
int offset, packet_info *pinfo, proto_tree *tree) {
proto_item *ti;
proto_tree *osi_option_tree = NULL;
u_char parm_len = 0;
u_char parm_type = 0;
guint8 octet;
if (tree) {
if ( 0 == opt_len ) {
proto_tree_add_text( tree, tvb, offset, 0,
"### No Options for this PDU ###" );
return;
}
if ( opt_len > END_OF_FRAME ) {
proto_tree_add_text( tree, tvb, offset, END_OF_FRAME,
"### Options go past the end of the captured data in this PDU ###" );
return;
}
ti = proto_tree_add_text( tree, tvb, offset, opt_len,
"### Option Section ###" );
osi_option_tree = proto_item_add_subtree( ti, ott_osi_options );
while ( 0 < opt_len ) {
parm_type = (int) tvb_get_guint8(tvb, offset);
offset++;
parm_len = (int) tvb_get_guint8(tvb, offset);
offset++;
switch ( parm_type ) {
case OSI_OPT_QOS_MAINTANANCE:
octet = tvb_get_guint8(tvb, offset);
dissect_option_qos( octet&OSI_OPT_QOS_MASK,
octet&OSI_OPT_QOS_SUB_MASK,
offset, parm_len, tvb, osi_option_tree );
break;
case OSI_OPT_SECURITY:
octet = tvb_get_guint8(tvb, offset);
proto_tree_add_text( osi_option_tree, tvb, offset, parm_len,
"Security type: %s",
val_to_str( octet&OSI_OPT_SEC_MASK,
osi_opt_sec_vals, "Unknown (0x%x)") );
break;
case OSI_OPT_PRIORITY:
octet = tvb_get_guint8(tvb, offset);
if ( OSI_OPT_MAX_PRIORITY >= octet ) {
proto_tree_add_text( osi_option_tree, tvb, offset, parm_len,
"Priority : %u", octet );
}
else {
proto_tree_add_text( osi_option_tree, tvb, offset, parm_len,
"Priority : %u ( Invalid )",
octet );
}
break;
case OSI_OPT_ADDRESS_MASK:
proto_tree_add_text( osi_option_tree, tvb, offset, parm_len,
"Address Mask: %s",
print_area( tvb_get_ptr(tvb, offset, parm_len), parm_len ) );
break;
case OSI_OPT_SNPA_MASK:
proto_tree_add_text( osi_option_tree, tvb, offset, parm_len,
"SNPA Mask : %s",
print_system_id( tvb_get_ptr(tvb, offset, parm_len), parm_len ));
break;
case OSI_OPT_ES_CONFIG_TIMER:
proto_tree_add_text( osi_option_tree, tvb, offset, parm_len,
"ESCT : %u seconds", tvb_get_ntohs( tvb, offset ) );
break;
case OSI_OPT_PADDING:
proto_tree_add_text( osi_option_tree, tvb, offset, parm_len,
"Padding : %u Octets", parm_len ) ;
break;
case OSI_OPT_SOURCE_ROUTING:
case OSI_OPT_RECORD_OF_ROUTE:
dissect_option_route( parm_type,
offset, parm_len, tvb, osi_option_tree );
break;
case OSI_OPT_REASON_OF_DISCARD:
dissect_option_rfd( tvb_get_guint8(tvb, offset),
tvb_get_guint8(tvb, offset + 1),
offset, parm_len, tvb, osi_option_tree );
break;
}
opt_len -= parm_len + 2;
offset += parm_len;
}
}
} /* dissect-osi-options */
/*
* Name: proto_register_osi_options()
*
* Description:
* main register for esis protocol set. We register some display
* formats and the protocol module variables.
*
* NOTE: this procedure to autolinked by the makefile process that
* builds register.c
*
* Input:
* void
*
* Output:
* void
*/
void
proto_register_osi_options(void) {
static gint *ott[] = {
&ott_osi_options,
&ott_osi_qos,
&ott_osi_route,
&ott_osi_redirect,
};
proto_register_subtree_array( ott, array_length(ott));
}
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