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/* packet-fbzero.c
* Routines for Zero Protocol dissection
* Copyright 2016 - 2017 , Alexis La Goutte < alexis . lagoutte at gmail dot com >
*
* Wireshark - Network traffic analyzer
* By Gerald Combs < gerald @ wireshark . org >
* Copyright 1998 Gerald Combs
*
2018-02-12 11:23:27 +00:00
* SPDX - License - Identifier : GPL - 2.0 - or - later
2016-11-21 13:01:36 +00:00
*/
/*
Zero Protocol coming from Facebook and used the same framing like QUIC ( tag - map value ) but based on TCP
It was reverse engineered based off of QUIC dissector functionality
*/
# include "config.h"
# include <epan/packet.h>
# include <epan/prefs.h>
# include <epan/expert.h>
# include <epan/conversation.h>
void proto_register_fb_zero ( void ) ;
void proto_reg_handoff_fb_zero ( void ) ;
static int proto_fb_zero = - 1 ;
static dissector_handle_t fb_zero_handle ;
static int hf_fb_zero_puflags = - 1 ;
static int hf_fb_zero_puflags_vrsn = - 1 ;
static int hf_fb_zero_puflags_unknown = - 1 ;
static int hf_fb_zero_version = - 1 ;
static int hf_fb_zero_length = - 1 ;
static int hf_fb_zero_tag = - 1 ;
static int hf_fb_zero_tags = - 1 ;
static int hf_fb_zero_tag_number = - 1 ;
static int hf_fb_zero_tag_value = - 1 ;
static int hf_fb_zero_tag_type = - 1 ;
static int hf_fb_zero_tag_offset_end = - 1 ;
static int hf_fb_zero_tag_length = - 1 ;
static int hf_fb_zero_tag_sni = - 1 ;
static int hf_fb_zero_tag_vers = - 1 ;
static int hf_fb_zero_tag_sno = - 1 ;
static int hf_fb_zero_tag_aead = - 1 ;
static int hf_fb_zero_tag_scid = - 1 ;
static int hf_fb_zero_tag_time = - 1 ;
static int hf_fb_zero_tag_alpn = - 1 ;
static int hf_fb_zero_tag_pubs = - 1 ;
static int hf_fb_zero_tag_kexs = - 1 ;
static int hf_fb_zero_tag_nonc = - 1 ;
static int hf_fb_zero_tag_unknown = - 1 ;
static int hf_fb_zero_padding = - 1 ;
static int hf_fb_zero_payload = - 1 ;
static int hf_fb_zero_unknown = - 1 ;
static gint ett_fb_zero = - 1 ;
static gint ett_fb_zero_puflags = - 1 ;
static gint ett_fb_zero_prflags = - 1 ;
static gint ett_fb_zero_ft = - 1 ;
static gint ett_fb_zero_ftflags = - 1 ;
static gint ett_fb_zero_tag_value = - 1 ;
static expert_field ei_fb_zero_tag_undecoded = EI_INIT ;
static expert_field ei_fb_zero_tag_length = EI_INIT ;
static expert_field ei_fb_zero_tag_unknown = EI_INIT ;
# define FBZERO_MIN_LENGTH 3
# define VERSION_QTV 0x515456
/**************************************************************************/
/* Public Flags */
/**************************************************************************/
# define PUFLAGS_VRSN 0x01
# define PUFLAGS_UNKN 0xFE
/**************************************************************************/
/* Message tag */
/**************************************************************************/
# define MTAG_CHLO 0x43484C4F
# define MTAG_SNOM 0x534E4F4D
# define MTAG_SHLO 0x53484C4F
# define MTAG_REJ 0x52454A00
# define MTAG_PRST 0x50525354
static const value_string message_tag_vals [ ] = {
{ MTAG_CHLO , " Client Hello " } ,
{ MTAG_SNOM , " Server NOM?? " } ,
{ MTAG_SHLO , " Server Hello " } ,
{ MTAG_REJ , " Rejection " } ,
{ MTAG_PRST , " Public Reset " } ,
{ 0 , NULL }
} ;
/**************************************************************************/
/* Tag */
/**************************************************************************/
# define TAG_SNI 0x534E4900
# define TAG_VERS 0x56455253
# define TAG_SNO 0x534E4F00
# define TAG_AEAD 0x41454144
# define TAG_SCID 0x53434944
# define TAG_TIME 0x54494d45
# define TAG_ALPN 0x414C504E
# define TAG_PUBS 0x50554253
# define TAG_KEXS 0x4B455853
# define TAG_NONC 0x4E4F4E43
static const value_string tag_vals [ ] = {
{ TAG_SNI , " Server Name Indication " } ,
{ TAG_VERS , " Version " } ,
{ TAG_SNO , " Server nonce " } ,
{ TAG_AEAD , " Authenticated encryption algorithms " } ,
{ TAG_SCID , " Server config ID " } ,
{ TAG_TIME , " Time " } ,
{ TAG_ALPN , " ALPN " } ,
{ TAG_PUBS , " Public value " } ,
{ TAG_KEXS , " Key exchange algorithms " } ,
{ TAG_NONC , " Client Nonce " } ,
{ 0 , NULL }
} ;
/**************************************************************************/
/* AEAD Tag */
/**************************************************************************/
# define AEAD_AESG 0x41455347
# define AEAD_S20P 0x53323050
# define AEAD_CC12 0x43433132
static const value_string tag_aead_vals [ ] = {
{ AEAD_AESG , " AES-GCM with a 12-byte tag and IV " } ,
{ AEAD_S20P , " Salsa20 with Poly1305 " } ,
{ AEAD_CC12 , " Salsa20 with Poly1305 " } ,
{ 0 , NULL }
} ;
/**************************************************************************/
/* KEXS Tag */
/**************************************************************************/
# define KEXS_C255 0x43323535
# define KEXS_P256 0x50323536
static const value_string tag_kexs_vals [ ] = {
{ KEXS_C255 , " Curve25519 " } ,
{ KEXS_P256 , " P-256 " } ,
{ 0 , NULL }
} ;
static guint32
dissect_fb_zero_tag ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * fb_zero_tree , guint offset , guint32 tag_number ) {
guint32 tag_offset_start = offset + tag_number * 4 * 2 ;
guint32 tag_offset = 0 , total_tag_len = 0 ;
gint32 tag_len ;
while ( tag_number ) {
proto_tree * tag_tree , * ti_len , * ti_tag , * ti_type ;
guint32 offset_end , tag ;
const guint8 * tag_str ;
ti_tag = proto_tree_add_item ( fb_zero_tree , hf_fb_zero_tags , tvb , offset , 8 , ENC_NA ) ;
tag_tree = proto_item_add_subtree ( ti_tag , ett_fb_zero_tag_value ) ;
ti_type = proto_tree_add_item_ret_string ( tag_tree , hf_fb_zero_tag_type , tvb , offset , 4 , ENC_ASCII | ENC_NA , wmem_packet_scope ( ) , & tag_str ) ;
tag = tvb_get_ntohl ( tvb , offset ) ;
proto_item_append_text ( ti_type , " (%s) " , val_to_str ( tag , tag_vals , " Unknown " ) ) ;
proto_item_append_text ( ti_tag , " : %s (%s) " , tag_str , val_to_str ( tag , tag_vals , " Unknown " ) ) ;
offset + = 4 ;
proto_tree_add_item ( tag_tree , hf_fb_zero_tag_offset_end , tvb , offset , 4 , ENC_LITTLE_ENDIAN ) ;
offset_end = tvb_get_letohl ( tvb , offset ) ;
tag_len = offset_end - tag_offset ;
total_tag_len + = tag_len ;
ti_len = proto_tree_add_uint ( tag_tree , hf_fb_zero_tag_length , tvb , offset , 4 , tag_len ) ;
proto_item_append_text ( ti_tag , " (l=%u) " , tag_len ) ;
PROTO_ITEM_SET_GENERATED ( ti_len ) ;
offset + = 4 ;
/* Fix issue with CRT.. (Fragmentation ?) */
if ( tag_len > tvb_reported_length_remaining ( tvb , tag_offset_start + tag_offset ) ) {
tag_len = tvb_reported_length_remaining ( tvb , tag_offset_start + tag_offset ) ;
offset_end = tag_offset + tag_len ;
expert_add_info ( pinfo , ti_len , & ei_fb_zero_tag_length ) ;
}
proto_tree_add_item ( tag_tree , hf_fb_zero_tag_value , tvb , tag_offset_start + tag_offset , tag_len , ENC_NA ) ;
switch ( tag ) {
case TAG_SNI :
proto_tree_add_item_ret_string ( tag_tree , hf_fb_zero_tag_sni , tvb , tag_offset_start + tag_offset , tag_len , ENC_ASCII | ENC_NA , wmem_packet_scope ( ) , & tag_str ) ;
proto_item_append_text ( ti_tag , " : %s " , tag_str ) ;
tag_offset + = tag_len ;
break ;
case TAG_VERS :
proto_tree_add_item_ret_string ( tag_tree , hf_fb_zero_tag_vers , tvb , tag_offset_start + tag_offset , 4 , ENC_ASCII | ENC_NA , wmem_packet_scope ( ) , & tag_str ) ;
proto_item_append_text ( ti_tag , " : %s " , tag_str ) ;
tag_offset + = 4 ;
break ;
case TAG_SNO :
proto_tree_add_item ( tag_tree , hf_fb_zero_tag_sno , tvb , tag_offset_start + tag_offset , tag_len , ENC_NA ) ;
tag_offset + = tag_len ;
break ;
case TAG_AEAD :
while ( offset_end - tag_offset > = 4 ) {
proto_tree * ti_aead ;
ti_aead = proto_tree_add_item ( tag_tree , hf_fb_zero_tag_aead , tvb , tag_offset_start + tag_offset , 4 , ENC_ASCII | ENC_NA ) ;
proto_item_append_text ( ti_aead , " (%s) " , val_to_str ( tvb_get_ntohl ( tvb , tag_offset_start + tag_offset ) , tag_aead_vals , " Unknown " ) ) ;
proto_item_append_text ( ti_tag , " , %s " , val_to_str ( tvb_get_ntohl ( tvb , tag_offset_start + tag_offset ) , tag_aead_vals , " Unknown " ) ) ;
tag_offset + = 4 ;
}
break ;
case TAG_SCID :
proto_tree_add_item ( tag_tree , hf_fb_zero_tag_scid , tvb , tag_offset_start + tag_offset , tag_len , ENC_NA ) ;
tag_offset + = tag_len ;
break ;
case TAG_TIME :
proto_tree_add_item ( tag_tree , hf_fb_zero_tag_time , tvb , tag_offset_start + tag_offset , 4 , ENC_LITTLE_ENDIAN ) ;
proto_item_append_text ( ti_tag , " : %u " , tvb_get_letohl ( tvb , tag_offset_start + tag_offset ) ) ;
tag_offset + = 4 ;
break ;
case TAG_ALPN :
proto_tree_add_item_ret_string ( tag_tree , hf_fb_zero_tag_alpn , tvb , tag_offset_start + tag_offset , 4 , ENC_ASCII | ENC_NA , wmem_packet_scope ( ) , & tag_str ) ;
proto_item_append_text ( ti_tag , " : %s " , tag_str ) ;
tag_offset + = 4 ;
break ;
case TAG_PUBS :
/*TODO FIX: 24 Length + Pubs key?.. ! */
proto_tree_add_item ( tag_tree , hf_fb_zero_tag_pubs , tvb , tag_offset_start + tag_offset , 2 , ENC_LITTLE_ENDIAN ) ;
tag_offset + = 2 ;
while ( offset_end - tag_offset > = 3 ) {
proto_tree_add_item ( tag_tree , hf_fb_zero_tag_pubs , tvb , tag_offset_start + tag_offset , 3 , ENC_LITTLE_ENDIAN ) ;
tag_offset + = 3 ;
}
break ;
case TAG_KEXS :
while ( offset_end - tag_offset > = 4 ) {
proto_tree * ti_kexs ;
ti_kexs = proto_tree_add_item ( tag_tree , hf_fb_zero_tag_kexs , tvb , tag_offset_start + tag_offset , 4 , ENC_ASCII | ENC_NA ) ;
proto_item_append_text ( ti_kexs , " (%s) " , val_to_str ( tvb_get_ntohl ( tvb , tag_offset_start + tag_offset ) , tag_kexs_vals , " Unknown " ) ) ;
proto_item_append_text ( ti_tag , " , %s " , val_to_str ( tvb_get_ntohl ( tvb , tag_offset_start + tag_offset ) , tag_kexs_vals , " Unknown " ) ) ;
tag_offset + = 4 ;
}
break ;
case TAG_NONC :
/*TODO: Enhance display: 32 bytes consisting of 4 bytes of timestamp (big-endian, UNIX epoch seconds), 8 bytes of server orbit and 20 bytes of random data. */
proto_tree_add_item ( tag_tree , hf_fb_zero_tag_nonc , tvb , tag_offset_start + tag_offset , 32 , ENC_NA ) ;
tag_offset + = 32 ;
break ;
default :
proto_tree_add_item ( tag_tree , hf_fb_zero_tag_unknown , tvb , tag_offset_start + tag_offset , tag_len , ENC_NA ) ;
expert_add_info_format ( pinfo , ti_tag , & ei_fb_zero_tag_undecoded ,
" Dissector for FB Zero Tag "
" %s (%s) code not implemented, Contact "
" Wireshark developers if you want this supported " , tvb_get_string_enc ( wmem_packet_scope ( ) , tvb , offset - 8 , 4 , ENC_ASCII | ENC_NA ) , val_to_str ( tag , tag_vals , " Unknown " ) ) ;
tag_offset + = tag_len ;
break ;
}
if ( tag_offset ! = offset_end ) {
/* Wrong Tag len... */
proto_tree_add_expert ( tag_tree , pinfo , & ei_fb_zero_tag_unknown , tvb , tag_offset_start + tag_offset , offset_end - tag_offset ) ;
tag_offset = offset_end ;
}
tag_number - - ;
}
return offset + total_tag_len ;
}
static int
dissect_fb_zero_unencrypt ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * fb_zero_tree , guint offset , guint8 len_pkn _U_ ) {
while ( tvb_reported_length_remaining ( tvb , offset ) > 0 ) {
proto_item * ti ;
guint32 message_tag , tag_number , length ;
const guint8 * message_tag_str ;
proto_tree_add_item ( fb_zero_tree , hf_fb_zero_unknown , tvb , offset , 1 , ENC_NA ) ;
offset + = 1 ;
proto_tree_add_item_ret_uint ( fb_zero_tree , hf_fb_zero_length , tvb , offset , 4 , ENC_LITTLE_ENDIAN , & length ) ;
offset + = 4 ;
message_tag = tvb_get_ntohl ( tvb , offset ) ;
/* check if it is a known message_tag (CHLO, SNOM...) */
if ( try_val_to_str ( message_tag , message_tag_vals ) ) {
ti = proto_tree_add_item_ret_string ( fb_zero_tree , hf_fb_zero_tag , tvb , offset , 4 , ENC_ASCII | ENC_NA , wmem_packet_scope ( ) , & message_tag_str ) ;
proto_item_append_text ( ti , " , Type: %s (%s) " , message_tag_str , val_to_str ( message_tag , message_tag_vals , " Unknown Tag " ) ) ;
col_add_fstr ( pinfo - > cinfo , COL_INFO , " %s " , val_to_str ( message_tag , message_tag_vals , " Unknown " ) ) ;
offset + = 4 ;
proto_tree_add_item ( fb_zero_tree , hf_fb_zero_tag_number , tvb , offset , 2 , ENC_LITTLE_ENDIAN ) ;
tag_number = tvb_get_letohs ( tvb , offset ) ;
offset + = 2 ;
proto_tree_add_item ( fb_zero_tree , hf_fb_zero_padding , tvb , offset , 2 , ENC_NA ) ;
offset + = 2 ;
offset = dissect_fb_zero_tag ( tvb , pinfo , fb_zero_tree , offset , tag_number ) ;
} else {
proto_tree_add_item ( fb_zero_tree , hf_fb_zero_unknown , tvb , offset , length , ENC_NA ) ;
offset + = length ;
}
}
return offset ;
}
static int
dissect_fb_zero_common ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * tree ,
void * data _U_ )
{
proto_item * ti , * ti_puflags ;
proto_tree * fb_zero_tree , * puflags_tree ;
guint offset = 0 ;
guint8 puflags ;
guint32 message_tag , version ;
if ( tvb_captured_length ( tvb ) < FBZERO_MIN_LENGTH )
return 0 ;
col_set_str ( pinfo - > cinfo , COL_PROTOCOL , " FB_ZERO " ) ;
ti = proto_tree_add_item ( tree , proto_fb_zero , tvb , 0 , - 1 , ENC_NA ) ;
fb_zero_tree = proto_item_add_subtree ( ti , ett_fb_zero ) ;
/* Public Flags */
ti_puflags = proto_tree_add_item ( fb_zero_tree , hf_fb_zero_puflags , tvb , offset , 1 , ENC_LITTLE_ENDIAN ) ;
puflags_tree = proto_item_add_subtree ( ti_puflags , ett_fb_zero_puflags ) ;
proto_tree_add_item ( puflags_tree , hf_fb_zero_puflags_vrsn , tvb , offset , 1 , ENC_NA ) ;
proto_tree_add_item ( puflags_tree , hf_fb_zero_puflags_unknown , tvb , offset , 1 , ENC_LITTLE_ENDIAN ) ;
puflags = tvb_get_guint8 ( tvb , offset ) ;
offset + = 1 ;
if ( puflags & PUFLAGS_VRSN ) {
version = tvb_get_ntoh24 ( tvb , offset ) ;
if ( version = = VERSION_QTV ) {
proto_tree_add_item ( fb_zero_tree , hf_fb_zero_version , tvb , offset , 3 , ENC_ASCII | ENC_NA ) ;
offset + = 3 ;
}
}
/* Unencrypt Message (Handshake or Connection Close...) */
message_tag = tvb_get_ntohl ( tvb , offset + 5 ) ;
if ( message_tag = = MTAG_CHLO | | message_tag = = MTAG_SNOM ) {
offset = dissect_fb_zero_unencrypt ( tvb , pinfo , fb_zero_tree , offset , 1 ) ;
} else { /* Payload... (encrypted... TODO FIX !) */
col_add_str ( pinfo - > cinfo , COL_INFO , " Payload (Encrypted) " ) ;
proto_tree_add_item ( fb_zero_tree , hf_fb_zero_payload , tvb , offset , - 1 , ENC_NA ) ;
}
return offset ;
}
static int
dissect_fb_zero ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * tree ,
void * data _U_ )
{
return dissect_fb_zero_common ( tvb , pinfo , tree , NULL ) ;
}
static gboolean dissect_fb_zero_heur ( tvbuff_t * tvb , packet_info * pinfo , proto_tree * tree , void * data )
{
conversation_t * conversation = NULL ;
int offset = 0 ;
guint32 version , length , message_tag ;
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/* Verify packet size (Flag (1 byte) + Version (3bytes) + Flag (1 byte) + length (4 bytes) + Tag (4 bytes)) */
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if ( tvb_captured_length ( tvb ) < 13 )
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{
return FALSE ;
}
/* Flag */
offset + = 1 ;
/* Version */
version = tvb_get_ntoh24 ( tvb , offset ) ;
offset + = 3 ;
/* Flag */
offset + = 1 ;
/* length */
length = tvb_get_letohl ( tvb , offset ) ;
offset + = 4 ;
/* (message) tag */
message_tag = tvb_get_ntohl ( tvb , offset ) ;
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if ( version = = VERSION_QTV & & length < = tvb_reported_length ( tvb ) & & ( message_tag = = MTAG_CHLO | | message_tag = = MTAG_SNOM ) ) {
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conversation = find_or_create_conversation ( pinfo ) ;
conversation_set_dissector ( conversation , fb_zero_handle ) ;
dissect_fb_zero ( tvb , pinfo , tree , data ) ;
return TRUE ;
}
return FALSE ;
}
void
proto_register_fb_zero ( void )
{
static hf_register_info hf [ ] = {
{ & hf_fb_zero_puflags ,
{ " Public Flags " , " fb_zero.puflags " ,
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FT_UINT8 , BASE_HEX , NULL , 0x0 ,
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" Specifying per-packet public flags " , HFILL }
} ,
{ & hf_fb_zero_puflags_vrsn ,
{ " Version " , " fb_zero.puflags.version " ,
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FT_BOOLEAN , 8 , TFS ( & tfs_yes_no ) , PUFLAGS_VRSN ,
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" Signifies that this packet also contains the version of the FB Zero protocol " , HFILL }
} ,
{ & hf_fb_zero_puflags_unknown ,
{ " Unknown " , " fb_zero.puflags.unknown " ,
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FT_UINT8 , BASE_HEX , NULL , PUFLAGS_UNKN ,
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NULL , HFILL }
} ,
{ & hf_fb_zero_version ,
{ " Version " , " fb_zero.version " ,
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FT_STRING , BASE_NONE , NULL , 0x0 ,
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" 32 bit opaque tag that represents the version of the ZB Zero (Always QTV) " , HFILL }
} ,
{ & hf_fb_zero_length ,
{ " Length " , " fb_zero.length " ,
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FT_UINT32 , BASE_DEC , NULL , 0x0 ,
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NULL , HFILL }
} ,
{ & hf_fb_zero_tag ,
{ " Tag " , " fb_zero.tag " ,
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FT_STRING , BASE_NONE , NULL , 0x0 ,
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NULL , HFILL }
} ,
{ & hf_fb_zero_tag_number ,
{ " Tag Number " , " fb_zero.tag_number " ,
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FT_UINT16 , BASE_DEC , NULL , 0x0 ,
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NULL , HFILL }
} ,
{ & hf_fb_zero_tags ,
{ " Tag/value " , " fb_zero.tags " ,
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FT_NONE , BASE_NONE , NULL , 0x0 ,
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NULL , HFILL }
} ,
{ & hf_fb_zero_tag_type ,
{ " Tag Type " , " fb_zero.tag_type " ,
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FT_STRING , BASE_NONE , NULL , 0x0 ,
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NULL , HFILL }
} ,
{ & hf_fb_zero_tag_offset_end ,
{ " Tag offset end " , " fb_zero.tag_offset_end " ,
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FT_UINT32 , BASE_DEC , NULL , 0x0 ,
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NULL , HFILL }
} ,
{ & hf_fb_zero_tag_length ,
{ " Tag length " , " fb_zero.tag_offset_length " ,
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FT_UINT32 , BASE_DEC , NULL , 0x0 ,
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NULL , HFILL }
} ,
{ & hf_fb_zero_tag_value ,
{ " Tag/value " , " fb_zero.tag_value " ,
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FT_BYTES , BASE_NONE , NULL , 0x0 ,
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NULL , HFILL }
} ,
{ & hf_fb_zero_tag_sni ,
{ " Server Name Indication " , " fb_zero.tag.sni " ,
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FT_STRING , BASE_NONE , NULL , 0x0 ,
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" The fully qualified DNS name of the server, canonicalised to lowercase with no trailing period " , HFILL }
} ,
{ & hf_fb_zero_tag_vers ,
{ " Version " , " fb_zero.tag.version " ,
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FT_STRING , BASE_NONE , NULL , 0x0 ,
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" Version of FB Zero supported " , HFILL }
} ,
{ & hf_fb_zero_tag_sno ,
{ " Server nonce " , " fb_zero.tag.sno " ,
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FT_BYTES , BASE_NONE , NULL , 0x0 ,
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NULL , HFILL }
} ,
{ & hf_fb_zero_tag_aead ,
{ " Authenticated encryption algorithms " , " fb_zero.tag.aead " ,
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FT_STRING , BASE_NONE , NULL , 0x0 ,
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" A list of tags, in preference order, specifying the AEAD primitives supported by the server " , HFILL }
} ,
{ & hf_fb_zero_tag_scid ,
{ " Server Config ID " , " fb_zero.tag.scid " ,
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FT_BYTES , BASE_NONE , NULL , 0x0 ,
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" An opaque, 16-byte identifier for this server config " , HFILL }
} ,
{ & hf_fb_zero_tag_time ,
{ " Time " , " fb_zero.tag.time " ,
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FT_UINT32 , BASE_DEC , NULL , 0x0 ,
NULL , HFILL }
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} ,
{ & hf_fb_zero_tag_alpn ,
{ " ALPN " , " fb_zero.tag.alpn " ,
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FT_STRING , BASE_NONE , NULL , 0x0 ,
" Application-Layer Protocol Negotiation supported " , HFILL }
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} ,
{ & hf_fb_zero_tag_pubs ,
{ " Public value " , " fb_zero.tag.pubs " ,
2017-07-07 10:41:24 +00:00
FT_UINT24 , BASE_DEC_HEX , NULL , 0x0 ,
2016-11-21 13:01:36 +00:00
" A list of public values, 24-bit, little-endian length prefixed " , HFILL }
} ,
{ & hf_fb_zero_tag_kexs ,
{ " Key exchange algorithms " , " fb_zero.tag.kexs " ,
2017-07-07 10:41:24 +00:00
FT_STRING , BASE_NONE , NULL , 0x0 ,
2016-11-21 13:01:36 +00:00
" A list of tags, in preference order, specifying the key exchange algorithms that the server supports " , HFILL }
} ,
{ & hf_fb_zero_tag_nonc ,
{ " Client nonce " , " fb_zero.tag.nonc " ,
2017-07-07 10:41:24 +00:00
FT_BYTES , BASE_NONE , NULL , 0x0 ,
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" 32 bytes consisting of 4 bytes of timestamp (big-endian, UNIX epoch seconds), 8 bytes of server orbit and 20 bytes of random data " , HFILL }
} ,
{ & hf_fb_zero_tag_unknown ,
{ " Unknown tag " , " fb_zero.tag.unknown " ,
2017-07-07 10:41:24 +00:00
FT_BYTES , BASE_NONE , NULL , 0x0 ,
2016-11-21 13:01:36 +00:00
NULL , HFILL }
} ,
{ & hf_fb_zero_padding ,
{ " Padding " , " fb_zero.padding " ,
2017-07-07 10:41:24 +00:00
FT_BYTES , BASE_NONE , NULL , 0x0 ,
2016-11-21 13:01:36 +00:00
NULL , HFILL }
} ,
{ & hf_fb_zero_payload ,
{ " Payload " , " fb_zero.payload " ,
2017-07-07 10:41:24 +00:00
FT_BYTES , BASE_NONE , NULL , 0x0 ,
2016-11-21 13:01:36 +00:00
" Fb Zero Payload.. " , HFILL }
} ,
{ & hf_fb_zero_unknown ,
{ " Unknown " , " fb_zero.unknown " ,
2017-07-07 10:41:24 +00:00
FT_BYTES , BASE_NONE , NULL , 0x0 ,
2016-11-21 13:01:36 +00:00
" Unknown Data " , HFILL }
} ,
} ;
static gint * ett [ ] = {
& ett_fb_zero ,
& ett_fb_zero_puflags ,
& ett_fb_zero_prflags ,
& ett_fb_zero_ft ,
& ett_fb_zero_ftflags ,
& ett_fb_zero_tag_value
} ;
static ei_register_info ei [ ] = {
{ & ei_fb_zero_tag_undecoded , { " fb_zero.tag.undecoded " , PI_UNDECODED , PI_NOTE , " Dissector for FB Zero Tag code not implemented, Contact Wireshark developers if you want this supported " , EXPFILL } } ,
{ & ei_fb_zero_tag_length , { " fb_zero.tag.length.truncated " , PI_MALFORMED , PI_NOTE , " Truncated Tag Length... " , EXPFILL } } ,
{ & ei_fb_zero_tag_unknown , { " fb_zero.tag.unknown.data " , PI_UNDECODED , PI_NOTE , " Unknown Data " , EXPFILL } } ,
} ;
expert_module_t * expert_fb_zero ;
proto_fb_zero = proto_register_protocol ( " (Facebook) Zero Protocol " , " FBZERO " , " fb_zero " ) ;
fb_zero_handle = register_dissector ( " fb_zero " , dissect_fb_zero , proto_fb_zero ) ;
proto_register_field_array ( proto_fb_zero , hf , array_length ( hf ) ) ;
proto_register_subtree_array ( ett , array_length ( ett ) ) ;
expert_fb_zero = expert_register_protocol ( proto_fb_zero ) ;
expert_register_field_array ( expert_fb_zero , ei , array_length ( ei ) ) ;
}
void
proto_reg_handoff_fb_zero ( void )
{
heur_dissector_add ( " tcp " , dissect_fb_zero_heur , " FBZero (QUIC) over TCP " , " fb_zero " , proto_fb_zero , HEURISTIC_ENABLE ) ;
}
/*
* Editor modelines - https : //www.wireshark.org/tools/modelines.html
*
* 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 :
*/