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/* packet-ossp.c
* Routines for Organization Specific Slow Protocol dissection
* IEEE Std 802.3 , Annex 57 B
*
* Copyright 2002 Steve Housley < steve_housley @ 3 com . com >
* Copyright 2009 Artem Tamazov < artem . tamazov @ telllabs . com >
* Copyright 2010 Roberto Morro < roberto . morro [ AT ] tilab . com >
*
* Wireshark - Network traffic analyzer
* By Gerald Combs < gerald @ wireshark . org >
* Copyright 1998 Gerald Combs
*
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* SPDX - License - Identifier : GPL - 2.0 - or - later
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*/
# include "config.h"
# include <epan/packet.h>
# include <epan/slow_protocol_subtypes.h>
# include <epan/addr_resolv.h>
# include <epan/expert.h>
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# include <wsutil/str_util.h>
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/* General declarations */
void proto_register_ossp ( void ) ;
void proto_reg_handoff_ossp ( void ) ;
/*
* ESMC
*/
# define ITU_OUI_0 0x00
# define ITU_OUI_1 0x19
# define ITU_OUI_2 0xa7
# define OUI_SIZE 3
# define ESMC_ITU_SUBTYPE 0x0001
# define ESMC_VERSION_1 0x01
# define ESMC_QL_TLV_TYPE 0x01
# define ESMC_QL_TLV_LENGTH 0x04
# define ESMC_TIMESTAMP_TLV_TYPE 0x02
# define ESMC_TIMESTAMP_TLV_LENGTH 0x08
static const value_string esmc_event_flag_vals [ ] = {
{ 0 , " Information ESMC PDU " } ,
{ 1 , " Time-critical Event ESMC PDU " } ,
{ 0 , NULL }
} ;
static const value_string esmc_tlv_type_vals [ ] = {
{ 1 , " Quality Level " } ,
{ 2 , " Timestamp " } ,
{ 0 , NULL }
} ;
static const value_string esmc_timestamp_valid_flag_vals [ ] = {
{ 0 , " Not set. Do not use Timestamp value even if Timestamp TLV present " } ,
{ 1 , " Set. Timestamp TLV Present " } ,
{ 0 , NULL }
} ;
/* G.781 5.5.1.1 Option I SDH (same in G.707) */
static const value_string esmc_quality_level_opt_1_vals [ ] = {
{ 2 , " QL-PRC, Primary reference clock (G.811) " } ,
{ 4 , " QL-SSU-A, Type I or V SSU clock (G.812), 'transit node clock' " } ,
{ 8 , " QL-SSU-B, Type VI SSU clock (G.812), 'local node clock' " } ,
{ 11 , " QL-SEC, SEC clock (G.813, Option I) or QL-EEC1 (G.8262) " } ,
{ 15 , " QL-DNU, 'Do Not Use' " } ,
{ 0 , NULL }
} ;
static const value_string esmc_quality_level_opt_1_vals_short [ ] = {
{ 2 , " QL-PRC " } ,
{ 4 , " QL-SSU-A " } ,
{ 8 , " QL-SSU-B " } ,
{ 11 , " QL-SEC " } ,
{ 15 , " QL-DNU " } ,
{ 0 , NULL }
} ;
#if 0 /*not used yet*/
/* G.781 5.5.1.2 Option II SDH synchronization networking */
static const value_string esmc_quality_level_opt_2_vals [ ] = {
{ 0 , " QL-STU, unknown - signal does not carry the QL message of the source " } ,
{ 1 , " QL-PRS, PRS clock (G.811) / ST1, Stratum 1 Traceable " } ,
{ 4 , " QL-TNC, Transit Node Clock (G.812, Type V) " } ,
{ 7 , " QL-ST2, Stratum 2 clock (G.812, Type II) " } ,
{ 10 , " QL-ST3, Stratum 3 clock (G.812, Type IV) or QL-EEC2 (G.8262) " } ,
{ 12 , " QL-SMC, SONET self timed clock (G.813, Option II) / SMC 20 ppm Clock Traceable " } ,
{ 13 , " QL-ST3E, Stratum 3E clock (G.812, Type III) " } ,
{ 14 , " QL-PROV, provisionable by the network operator / Reserved for Network Synchronization " } ,
{ 15 , " QL-DUS, shall not be used for synchronization " } ,
{ 0 , NULL }
} ;
static const value_string esmc_quality_level_opt_2_short [ ] = {
{ 0 , " QL-STU " } ,
{ 1 , " QL-PRS " } ,
{ 4 , " QL-TNC " } ,
{ 7 , " QL-ST2 " } ,
{ 10 , " QL-ST3 " } ,
{ 12 , " QL-SMC " } ,
{ 13 , " QL-ST3E " } ,
{ 14 , " QL-PROV " } ,
{ 15 , " QL-DUS " } ,
{ 0 , NULL }
} ;
# endif
static const value_string esmc_quality_level_invalid_vals [ ] = {
{ 0 , " QL-INV0 " } ,
{ 1 , " QL-INV1 " } ,
{ 2 , " QL-INV2 " } ,
{ 3 , " QL-INV3 " } ,
{ 4 , " QL-INV4 " } ,
{ 5 , " QL-INV5 " } ,
{ 6 , " QL-INV6 " } ,
{ 7 , " QL-INV7 " } ,
{ 8 , " QL-INV8 " } ,
{ 9 , " QL-INV9 " } ,
{ 10 , " QL-INV10 " } ,
{ 11 , " QL-INV11 " } ,
{ 12 , " QL-INV12 " } ,
{ 13 , " QL-INV13 " } ,
{ 14 , " QL-INV14 " } ,
{ 15 , " QL-INV15 " } ,
{ 0 , NULL }
} ;
/* Initialise the protocol and registered fields */
static int proto_ossp = - 1 ;
static int hf_ossp_oui = - 1 ;
static int hf_itu_subtype = - 1 ;
static int hf_esmc_version = - 1 ;
static int hf_esmc_event_flag = - 1 ;
static int hf_esmc_timestamp_valid_flag = - 1 ;
static int hf_esmc_reserved_32 = - 1 ;
static int hf_esmc_tlv = - 1 ;
static int hf_esmc_tlv_type = - 1 ;
static int hf_esmc_tlv_length = - 1 ;
static int hf_esmc_tlv_ql_unused = - 1 ;
static int hf_esmc_tlv_ts_reserved = - 1 ;
static int hf_esmc_quality_level_opt_1 = - 1 ;
#if 0 /*not used yet*/
static int hf_esmc_quality_level_opt_2 = - 1 ;
# endif
static int hf_esmc_quality_level_invalid = - 1 ;
static int hf_esmc_timestamp = - 1 ;
static int hf_esmc_padding = - 1 ;
/*
* The Timestamp TLV and Timestamp Valid Flag fields
* are proposed in WD56 document for G .8264 .
* WD56 is not accepted at this moment ( June 2009 ) .
*
* The following variable controls dissection of Timestamp fields .
* Implementation is not fully complete yet - - in this version
* Timestamp dissection is always enabled .
*
* I expect that when WD56 proposal for G .8264 will be accepted ,
* ESMC Version would be used to control Timestamp dissection .
* In this case this variable will be eliminated ( replaced ) .
*
* Until that , a preference which controls Timestamp
* dissection may be added , if such need arise .
* At the moment this is not practical as nobody needs this .
*/
static gboolean pref_decode_esmc_timestamp = TRUE ;
/* Initialise the subtree pointers */
static gint ett_ossppdu = - 1 ;
static gint ett_itu_ossp = - 1 ;
static gint ett_esmc = - 1 ;
static expert_field ei_esmc_tlv_type_ql_type_not_first = EI_INIT ;
static expert_field ei_esmc_tlv_type_not_timestamp = EI_INIT ;
static expert_field ei_esmc_quality_level_invalid = EI_INIT ;
static expert_field ei_esmc_tlv_ql_unused_not_zero = EI_INIT ;
static expert_field ei_esmc_tlv_type_decoded_as_timestamp = EI_INIT ;
static expert_field ei_esmc_tlv_type_decoded_as_ql_type = EI_INIT ;
static expert_field ei_esmc_version_compliance = EI_INIT ;
static expert_field ei_esmc_tlv_length_bad = EI_INIT ;
static expert_field ei_esmc_reserved_not_zero = EI_INIT ;
static void
dissect_esmc_pdu ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * treex ) ;
static void
dissect_itu_ossp ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * tree ) ;
/*
* Name : dissect_ossp_pdu
*
* Description :
* This function is used to dissect the Organization Specific Slow
* Protocol defined in IEEE 802.3 Annex 57 B . Currently only the ESMC
* slow protocol as defined in ITU - T G .8264 is implemented
*
* Input Arguments :
* tvb : buffer associated with the rcv packet ( see tvbuff . h ) .
* pinfo : structure associated with the rcv packet ( see packet_info . h ) .
* tree : the protocol tree associated with the rcv packet ( see proto . h ) .
*
* Return Values : None
*
* Notes :
* Roberto Morro ( roberto . morro [ AT ] tilab . com )
*/
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static int
dissect_ossp_pdu ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * tree , void * data _U_ )
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{
gint offset = 0 ;
const gchar * str ;
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proto_item * ossp_item ;
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proto_tree * ossp_tree ;
tvbuff_t * ossp_tvb ;
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guint32 oui ;
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const guint8 itu_oui [ ] = { ITU_OUI_0 , ITU_OUI_1 , ITU_OUI_2 } ;
col_set_str ( pinfo - > cinfo , COL_PROTOCOL , " OSSP " ) ;
ossp_item = proto_tree_add_protocol_format ( tree , proto_ossp , tvb , 0 , - 1 ,
" Organization Specific Slow Protocol " ) ;
ossp_tree = proto_item_add_subtree ( ossp_item , ett_ossppdu ) ;
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proto_tree_add_item_ret_uint ( ossp_tree , hf_ossp_oui , tvb , offset , OUI_SIZE , ENC_BIG_ENDIAN , & oui ) ;
str = uint_get_manuf_name_if_known ( oui ) ;
col_add_fstr ( pinfo - > cinfo , COL_INFO , " OUI: %s " , ( str ! = NULL ) ? str : " (Unknown OSSP organization) " ) ;
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offset + = 3 ;
/*
* XXX - should have a dissector table here , but we don ' t yet
* support OUIs as keys in dissector tables .
*/
ossp_tvb = tvb_new_subset_remaining ( tvb , offset ) ;
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if ( tvb_memeql ( tvb , 0 , itu_oui , OUI_SIZE ) = = 0 )
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{
dissect_itu_ossp ( ossp_tvb , pinfo , ossp_tree ) ;
}
/* new Organization Specific Slow Protocols go hereafter */
#if 0
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else if ( tvb_memeql ( tvb , 0 , xxx_oui , OUI_SIZE ) = = 0 )
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{
dissect_xxx_ossp ( ossp_tvb , pinfo , ossp_tree ) ;
}
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else if ( tvb_memeql ( tvb , 0 , yyy_oui , OUI_SIZE ) = = 0 )
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{
dissect_yyy_ossp ( ossp_tvb , pinfo , ossp_tree ) ;
}
# endif
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return tvb_captured_length ( tvb ) ;
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}
/*
* Name : dissect_itu_ossp
*
* Description :
* This function is used to dissect the ITU - T OSSP ( Organization Specific
* Slow Protocol ) . Currently only the Ethernet Synchronization
* Messaging Channel ( ESMC ) slow protocol as defined in ITU - T G .8264
* is implemented
*
* Input Arguments :
* tvb : buffer associated with the rcv packet ( see tvbuff . h ) .
* pinfo : structure associated with the rcv packet ( see packet_info . h ) .
* tree : the protocol tree associated with the rcv packet ( see proto . h ) .
* subtype : the protocol subtype ( according to IEEE802 .3 annex 57 B )
*
* Return Values : None
*
* Notes :
* Roberto Morro ( roberto . morro [ AT ] tilab . com )
*/
static void
dissect_itu_ossp ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * tree )
{
guint16 subtype ;
proto_tree * itu_ossp_tree , * ti ;
/* ITU-T OSSP Subtype */
subtype = tvb_get_ntohs ( tvb , 0 ) ;
ti = proto_tree_add_item ( tree , hf_itu_subtype , tvb , 0 , 2 , ENC_BIG_ENDIAN ) ;
itu_ossp_tree = proto_item_add_subtree ( ti , ett_itu_ossp ) ;
switch ( subtype )
{
case ESMC_ITU_SUBTYPE :
dissect_esmc_pdu ( tvb , pinfo , itu_ossp_tree ) ;
break ;
/* Other ITU-T defined slow protocols go hereafter */
#if 0
case XXXX_ITU_SUBTYPE :
dissect_xxxx_pdu ( tvb , pinfo , itu_ossp_tree ) ;
break ;
# endif
default :
proto_item_append_text ( itu_ossp_tree , " (Unknown) " ) ;
}
}
/*
* Description :
* This function is used to dissect ESMC PDU defined G .8264 / Y .1364
* clause 11.3 .1 .1 .
*
* Added : TimeStamp TLV as per WD56 proposal for G .8264 ,
* " TLVs for ESMC and Querying Capability " .
*/
static void
dissect_esmc_pdu ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * treex )
{
gint offset = 2 ; /*starting from ESMC Version */
gboolean event_flag ;
gboolean malformed = FALSE ;
gint ql = - 1 ; /*negative means unknown:*/
gboolean timestamp_valid_flag = FALSE ; /*set if timestamp valid*/
gint32 timestamp = - 1 ; /*nanoseconds*/
col_set_str ( pinfo - > cinfo , COL_PROTOCOL , " ESMC " ) ;
proto_item_append_text ( treex , " : ESMC " ) ;
{
proto_tree * tree_a ;
tree_a = proto_item_add_subtree ( treex , ett_esmc ) ;
{ /* version */
proto_item * item_b ;
item_b = proto_tree_add_item ( tree_a , hf_esmc_version , tvb , offset , 1 , ENC_BIG_ENDIAN ) ;
if ( ( tvb_get_guint8 ( tvb , offset ) > > 4 ) ! = ESMC_VERSION_1 )
{
malformed = TRUE ;
expert_add_info_format ( pinfo , item_b , & ei_esmc_version_compliance , " Version must be 0x%.1x claim compliance with Version 1 of this protocol " , ESMC_VERSION_1 ) ;
}
/*stay at the same octet in tvb*/
}
{ /* event flag */
event_flag = ( ( tvb_get_guint8 ( tvb , offset ) & 0x08 ) ! = 0 ) ;
proto_tree_add_item ( tree_a , hf_esmc_event_flag , tvb , offset , 1 , ENC_BIG_ENDIAN ) ;
/*stay at the same octet in tvb*/
}
if ( pref_decode_esmc_timestamp )
{ /* timestamp valid flag */
timestamp_valid_flag = ( ( tvb_get_guint8 ( tvb , offset ) & 0x04 ) ! = 0 ) ;
proto_tree_add_item ( tree_a , hf_esmc_timestamp_valid_flag , tvb , offset , 1 , ENC_BIG_ENDIAN ) ;
/*stay at the same octet in tvb*/
}
{ /* reserved bits */
proto_item * item_b ;
guint32 reserved ;
reserved = tvb_get_ntohl ( tvb , offset )
& ( pref_decode_esmc_timestamp ? 0x3ffffff : 0x7ffffff ) ;
item_b = proto_tree_add_uint_format_value ( tree_a , hf_esmc_reserved_32 , tvb , offset , 4
, reserved , " 0x%.7x " , reserved ) ;
if ( reserved ! = 0x0 )
{
malformed = TRUE ;
expert_add_info_format ( pinfo , item_b , & ei_esmc_reserved_not_zero , " Reserved bits must be set to all zero on transmitter " ) ;
}
offset + = 4 ;
}
proto_item_append_text ( treex , " , Event:%s " , event_flag ?
" Time-critical " : " Information " ) ;
/*
* Quality Level TLV is mandatory at fixed location .
*/
{
proto_item * item_b ;
guint8 type ;
item_b = proto_tree_add_item ( tree_a , hf_esmc_tlv , tvb , offset , 4 , ENC_NA ) ;
{
proto_tree * tree_b ;
tree_b = proto_item_add_subtree ( item_b , ett_esmc ) ;
{
proto_item * item_c ;
guint16 length ;
guint8 unused ;
/* type */
type = tvb_get_guint8 ( tvb , offset ) ;
item_c = proto_tree_add_item ( tree_b , hf_esmc_tlv_type , tvb , offset , 1 , ENC_BIG_ENDIAN ) ;
if ( type ! = ESMC_QL_TLV_TYPE )
{
malformed = TRUE ;
expert_add_info_format ( pinfo , item_c , & ei_esmc_tlv_type_ql_type_not_first , " TLV Type must be == 0x%.2x (QL) because QL TLV must be first in the ESMC PDU " , ESMC_QL_TLV_TYPE ) ;
expert_add_info ( pinfo , item_c , & ei_esmc_tlv_type_decoded_as_ql_type ) ;
}
offset + = 1 ;
/* length */
length = tvb_get_ntohs ( tvb , offset ) ;
item_c = proto_tree_add_item ( tree_b , hf_esmc_tlv_length , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
if ( length ! = ESMC_QL_TLV_LENGTH )
{
malformed = TRUE ;
expert_add_info_format ( pinfo , item_c , & ei_esmc_tlv_length_bad , " QL TLV Length must be == 0x%.4x " , ESMC_QL_TLV_LENGTH ) ;
expert_add_info_format ( pinfo , item_c , & ei_esmc_tlv_type_decoded_as_ql_type , " Let's decode this TLV as if Length has valid value " ) ;
}
offset + = 2 ;
/* value */
unused = tvb_get_guint8 ( tvb , offset ) ; /*as temp var*/
ql = unused & 0x0f ;
unused & = 0xf0 ;
item_c = proto_tree_add_item ( tree_b , hf_esmc_tlv_ql_unused , tvb , offset , 1 , ENC_BIG_ENDIAN ) ;
if ( unused ! = 0x00 )
{
malformed = TRUE ;
expert_add_info ( pinfo , item_c , & ei_esmc_tlv_ql_unused_not_zero ) ;
}
if ( NULL ! = try_val_to_str ( ql , esmc_quality_level_opt_1_vals ) )
{
proto_tree_add_item ( tree_b , hf_esmc_quality_level_opt_1 , tvb , offset , 1 , ENC_BIG_ENDIAN ) ;
}
else
{
item_c = proto_tree_add_item ( tree_b , hf_esmc_quality_level_invalid , tvb , offset , 1 , ENC_BIG_ENDIAN ) ;
expert_add_info ( pinfo , item_c , & ei_esmc_quality_level_invalid ) ;
}
offset + = 1 ;
}
}
proto_item_append_text ( item_b , " , %s "
, val_to_str ( ql , esmc_quality_level_opt_1_vals_short , " QL-INV%d " ) ) ;
}
proto_item_append_text ( treex , " , %s "
, val_to_str ( ql , esmc_quality_level_opt_1_vals_short , " QL-INV%d " ) ) ;
if ( pref_decode_esmc_timestamp )
{
/*
* Timestamp TLV is optional at fixed location .
* Decode it if Timestamp Valid flag is set ,
* or if type of next TLV is 0x02 .
*/
guint8 type ;
type = tvb_get_guint8 ( tvb , offset ) ;
if ( timestamp_valid_flag | | type = = ESMC_TIMESTAMP_TLV_TYPE )
{
proto_item * item_b ;
item_b = proto_tree_add_item ( tree_a , hf_esmc_tlv , tvb , offset , 8 , ENC_NA ) ;
{
proto_tree * tree_b ;
tree_b = proto_item_add_subtree ( item_b , ett_esmc ) ;
{
proto_item * item_c ;
guint16 length ;
guint8 reserved ;
/* type */
item_c = proto_tree_add_item ( tree_b , hf_esmc_tlv_type , tvb , offset , 1 , ENC_BIG_ENDIAN ) ;
if ( type ! = ESMC_TIMESTAMP_TLV_TYPE )
{
malformed = TRUE ;
expert_add_info_format ( pinfo , item_c , & ei_esmc_tlv_type_not_timestamp , " TLV Type must be == 0x%.2x (Timestamp) because Timestamp Valid Flag is set " , ESMC_TIMESTAMP_TLV_TYPE ) ;
expert_add_info ( pinfo , item_c , & ei_esmc_tlv_type_decoded_as_timestamp ) ;
}
offset + = 1 ;
/* length */
length = tvb_get_ntohs ( tvb , offset ) ;
item_c = proto_tree_add_item ( tree_b , hf_esmc_tlv_length , tvb , offset , 2 , ENC_BIG_ENDIAN ) ;
if ( length ! = ESMC_TIMESTAMP_TLV_LENGTH )
{
malformed = TRUE ;
expert_add_info_format ( pinfo , item_c , & ei_esmc_tlv_length_bad , " Timestamp TLV Length must be == 0x%.4x " , ESMC_TIMESTAMP_TLV_LENGTH ) ;
expert_add_info_format ( pinfo , item_c , & ei_esmc_tlv_type_decoded_as_timestamp , " Let's decode this TLV as if Length has valid value " ) ;
}
offset + = 2 ;
/* value */
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timestamp = tvb_get_ntohil ( tvb , offset ) ;
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item_c = proto_tree_add_item ( tree_b , hf_esmc_timestamp , tvb , offset , 4 , ENC_BIG_ENDIAN ) ;
if ( ! timestamp_valid_flag ) proto_item_append_text ( item_c , " [invalid] " ) ;
offset + = 4 ;
/* reserved */
reserved = tvb_get_guint8 ( tvb , offset ) ;
item_c = proto_tree_add_item ( tree_b , hf_esmc_tlv_ts_reserved , tvb , offset , 1 , ENC_BIG_ENDIAN ) ;
if ( reserved ! = 0x0 )
{
expert_add_info ( pinfo , item_c , & ei_esmc_reserved_not_zero ) ;
}
offset + = 1 ;
}
}
proto_item_append_text ( item_b , " , Timestamp: %d ns " , timestamp ) ;
if ( ! timestamp_valid_flag ) proto_item_append_text ( item_b , " [invalid] " ) ;
}
}
if ( timestamp_valid_flag )
{
proto_item_append_text ( treex , " , Timestamp:%d " , timestamp ) ;
}
}
{ /* padding */
gint padding_size ;
padding_size = tvb_captured_length_remaining ( tvb , offset ) ;
if ( 0 ! = padding_size )
{
proto_tree * tree_a ;
tree_a = proto_item_add_subtree ( treex , ett_esmc ) ;
{
proto_item * item_b ;
tvbuff_t * tvb_next ;
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tvb_next = tvb_new_subset_remaining ( tvb , offset ) ;
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item_b = proto_tree_add_item ( tree_a , hf_esmc_padding , tvb_next , 0 , - 1 , ENC_NA ) ;
proto_item_append_text ( item_b , " , %d %s%s " , padding_size
, " octet " , plurality ( padding_size , " " , " s " ) ) ;
{
proto_tree * tree_b ;
tree_b = proto_item_add_subtree ( item_b , ett_esmc ) ;
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call_data_dissector ( tvb_next , pinfo , tree_b ) ;
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}
}
}
}
/* append summary info */
col_add_fstr ( pinfo - > cinfo , COL_INFO , " Event:%s " , event_flag ?
" Time-critical " : " Information " ) ;
if ( ql > = 0 )
{
col_append_fstr ( pinfo - > cinfo , COL_INFO , " , %s "
, val_to_str ( ql , esmc_quality_level_opt_1_vals_short , " QL-INVALID-%d " ) ) ;
}
if ( timestamp_valid_flag )
{
col_append_fstr ( pinfo - > cinfo , COL_INFO , " , TS:%d " , timestamp ) ;
}
if ( malformed )
{
col_append_str ( pinfo - > cinfo , COL_INFO , " , Malformed PDU " ) ;
}
}
/* Register the protocol with Wireshark */
void
proto_register_ossp ( void )
{
/* Setup list of header fields */
static hf_register_info hf [ ] = {
{ & hf_ossp_oui ,
{ " OUI " , " ossp.oui " ,
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FT_UINT24 , BASE_OUI , NULL , 0 ,
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" IEEE assigned Organizationally Unique Identifier " , HFILL } } ,
{ & hf_itu_subtype ,
{ " ITU-T OSSP Subtype " , " ossp.itu.subtype " ,
FT_UINT16 , BASE_HEX , NULL , 0 ,
" Subtype assigned by the ITU-T " , HFILL } } ,
{ & hf_esmc_version ,
{ " Version " , " ossp.esmc.version " ,
FT_UINT8 , BASE_HEX , NULL , 0xf0 ,
" This field indicates the version of ITU-T SG15 Q13 OSSP frame format " , HFILL } } ,
{ & hf_esmc_event_flag ,
{ " Event Flag " , " ossp.esmc.event_flag " ,
FT_UINT8 , BASE_HEX , VALS ( esmc_event_flag_vals ) , 0x08 ,
" This bit distinguishes the critical, time sensitive behaviour of the "
" ESMC Event PDU from the ESMC Information PDU " , HFILL } } ,
{ & hf_esmc_timestamp_valid_flag ,
{ " Timestamp Valid Flag " , " ossp.esmc.timestamp_valid_flag " ,
FT_UINT8 , BASE_HEX , VALS ( esmc_timestamp_valid_flag_vals ) , 0x04 ,
" Indicates validity (i.e. presence) of the Timestamp TLV " , HFILL } } ,
{ & hf_esmc_reserved_32 ,
{ " Reserved " , " ossp.esmc.reserved " ,
FT_UINT32 , BASE_HEX , NULL , 0 ,
" Reserved. Set to all zero at the transmitter and ignored by the receiver " , HFILL } } ,
{ & hf_esmc_tlv ,
{ " ESMC TLV " , " ossp.esmc.tlv " ,
FT_NONE , BASE_NONE , NULL , 0 ,
NULL , HFILL } } ,
{ & hf_esmc_tlv_type ,
{ " TLV Type " , " ossp.esmc.tlv_type " ,
FT_UINT8 , BASE_HEX , VALS ( esmc_tlv_type_vals ) , 0 ,
NULL , HFILL } } ,
{ & hf_esmc_tlv_length ,
{ " TLV Length " , " ossp.esmc.tlv_length " ,
FT_UINT16 , BASE_HEX , NULL , 0 ,
NULL , HFILL } } ,
{ & hf_esmc_tlv_ql_unused ,
{ " Unused " , " ossp.esmc.tlv_ql_unused " ,
FT_UINT8 , BASE_HEX , NULL , 0xf0 ,
" This field is not used in QL TLV " , HFILL } } ,
{ & hf_esmc_quality_level_opt_1 ,
{ " SSM Code " , " ossp.esmc.ql " ,
FT_UINT8 , BASE_HEX , VALS ( esmc_quality_level_opt_1_vals ) , 0x0f ,
" Quality Level information " , HFILL } } ,
#if 0 /*not used yet*/
{ & hf_esmc_quality_level_opt_2 ,
{ " SSM Code " , " ossp.esmc.ql " ,
FT_UINT8 , BASE_HEX , VALS ( esmc_quality_level_opt_2_vals ) , 0x0f ,
" Quality Level information " , HFILL } } ,
# endif
{ & hf_esmc_quality_level_invalid ,
{ " SSM Code " , " ossp.esmc.ql " ,
FT_UINT8 , BASE_HEX , VALS ( esmc_quality_level_invalid_vals ) , 0x0f ,
" Quality Level information " , HFILL } } ,
{ & hf_esmc_timestamp ,
{ " Timestamp (ns) " , " ossp.esmc.timestamp " ,
FT_INT32 , BASE_DEC , NULL , 0 ,
" Timestamp according to the \" whole nanoseconds \" part of the IEEE 1588 originTimestamp " , HFILL } } ,
{ & hf_esmc_tlv_ts_reserved ,
{ " Reserved " , " ossp.esmc.tlv_ts_reserved " ,
FT_UINT8 , BASE_HEX , NULL , 0 ,
" Reserved. Set to all zero at the transmitter and ignored by the receiver " , HFILL } } ,
{ & hf_esmc_padding ,
{ " Padding " , " ossp.esmc.padding " ,
FT_BYTES , BASE_NONE , NULL , 0x0 ,
" This field contains necessary padding to achieve the minimum frame size of 64 bytes at least " , HFILL } } ,
} ;
/* Setup protocol subtree array */
static gint * ett [ ] = {
& ett_esmc ,
& ett_ossppdu ,
& ett_itu_ossp
} ;
static ei_register_info ei [ ] = {
{ & ei_esmc_version_compliance , { " ossp.esmc.version.compliance " , PI_MALFORMED , PI_ERROR , " Version must claim compliance with Version 1 of this protocol " , EXPFILL } } ,
{ & ei_esmc_tlv_type_ql_type_not_first , { " ossp.esmc.tlv_type.ql_type_not_first " , PI_MALFORMED , PI_ERROR , " TLV Type must be QL because QL TLV must be first in the ESMC PDU " , EXPFILL } } ,
{ & ei_esmc_tlv_type_decoded_as_ql_type , { " ossp.esmc.tlv_type.decoded_as_ql_type " , PI_UNDECODED , PI_NOTE , " Let's decode as if this is QL TLV " , EXPFILL } } ,
{ & ei_esmc_tlv_length_bad , { " ossp.esmc.tlv_length.bad " , PI_MALFORMED , PI_ERROR , " QL TLV Length must be X " , EXPFILL } } ,
{ & ei_esmc_tlv_ql_unused_not_zero , { " ossp.esmc.tlv_ql_unused.not_zero " , PI_MALFORMED , PI_WARN , " Unused bits of TLV must be all zeroes " , EXPFILL } } ,
{ & ei_esmc_quality_level_invalid , { " ossp.esmc.ql.invalid " , PI_UNDECODED , PI_WARN , " Invalid SSM message, unknown QL code " , EXPFILL } } ,
{ & ei_esmc_tlv_type_not_timestamp , { " ossp.esmc.tlv_type.not_timestamp " , PI_MALFORMED , PI_ERROR , " TLV Type must be == Timestamp because Timestamp Valid Flag is set " , EXPFILL } } ,
{ & ei_esmc_tlv_type_decoded_as_timestamp , { " ossp.esmc.tlv_type.decoded_as_timestamp " , PI_UNDECODED , PI_NOTE , " Let's decode as if this is Timestamp TLV " , EXPFILL } } ,
{ & ei_esmc_reserved_not_zero , { " ossp.esmc.reserved_bits_must_be_set_to_all_zero " , PI_PROTOCOL , PI_WARN , " Reserved bits must be set to all zero " , EXPFILL } } ,
} ;
expert_module_t * expert_ossp ;
/* Register the protocol name and description */
proto_ossp = proto_register_protocol ( " OSSP " , " Organization Specific Slow Protocol " , " ossp " ) ;
/* Required function calls to register the header fields and subtrees used */
proto_register_field_array ( proto_ossp , hf , array_length ( hf ) ) ;
proto_register_subtree_array ( ett , array_length ( ett ) ) ;
expert_ossp = expert_register_protocol ( proto_ossp ) ;
expert_register_field_array ( expert_ossp , ei , array_length ( ei ) ) ;
}
void
proto_reg_handoff_ossp ( void )
{
dissector_handle_t ossp_handle ;
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ossp_handle = create_dissector_handle ( dissect_ossp_pdu , proto_ossp ) ;
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dissector_add_uint ( " slow.subtype " , OSSP_SUBTYPE , ossp_handle ) ;
}
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/*
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* Editor modelines - https : //www.wireshark.org/tools/modelines.html
2014-09-29 18:42:55 +00:00
*
* Local variables :
* c - basic - offset : 4
* tab - width : 8
* indent - tabs - mode : nil
* End :
*
* vi : set shiftwidth = 4 tabstop = 8 expandtab :
* : indentSize = 4 : tabSize = 8 : noTabs = true :
*/