824 lines
24 KiB
C
824 lines
24 KiB
C
/*
|
|
* quic_process.c
|
|
*
|
|
* Created on: 2019Äê4ÔÂ2ÈÕ
|
|
* Author: root
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <assert.h>
|
|
#include <stdbool.h>
|
|
#include <MESA/stream.h>
|
|
#include <MESA/MESA_handle_logger.h>
|
|
|
|
#include "gquic_process.h"
|
|
#include "quic_analysis.h"
|
|
|
|
int quic_getLinkState(struct _quic_context *_context)
|
|
{
|
|
UCHAR state = 0;
|
|
|
|
if(0==_context->link_state)
|
|
{
|
|
state=SESSION_STATE_PENDING|SESSION_STATE_DATA;
|
|
}
|
|
else
|
|
{
|
|
state=SESSION_STATE_DATA;
|
|
}
|
|
|
|
return state;
|
|
}
|
|
|
|
char quic_callPlugins(struct streaminfo *pstream, struct _quic_context *_context, void *buff, int buff_len, enum quic_interested_region region_mask, void *a_packet)
|
|
{
|
|
char state=PROT_STATE_GIVEME;
|
|
char app_state=APP_STATE_GIVEME;
|
|
stSessionInfo session_info={0};
|
|
|
|
session_info.plugid=g_quic_param.quic_plugid;
|
|
session_info.prot_flag=(((unsigned long long)1)<<region_mask);
|
|
session_info.session_state=quic_getLinkState(_context) ;
|
|
session_info.app_info=(void*)(&_context->quic_info);
|
|
session_info.buf=buff;
|
|
session_info.buflen=buff_len;
|
|
|
|
state=PROT_PROCESS(&session_info, &(_context->business_pme), pstream->threadnum, pstream, a_packet);
|
|
|
|
if(state&PROT_STATE_DROPPKT)
|
|
{
|
|
app_state=APP_STATE_DROPPKT;
|
|
}
|
|
|
|
if(state&PROT_STATE_DROPME)
|
|
{
|
|
if(app_state&APP_STATE_DROPPKT)
|
|
{
|
|
app_state|=APP_STATE_DROPME;
|
|
}
|
|
else
|
|
{
|
|
app_state=APP_STATE_DROPME;
|
|
}
|
|
}
|
|
|
|
if(state&PROT_STATE_GIVEME)
|
|
{
|
|
app_state=APP_STATE_GIVEME;
|
|
}
|
|
|
|
return app_state;
|
|
}
|
|
|
|
|
|
unsigned long long get_variable_length(char *p, int offset, int v_len)
|
|
{
|
|
switch(v_len)
|
|
{
|
|
case 1:
|
|
return (unsigned long long)(p[offset]);
|
|
break;
|
|
case 2:
|
|
return (unsigned long long)ntohs(*(unsigned short *)((char *)p+offset));
|
|
break;
|
|
case 3:
|
|
return (unsigned long long)*(p+0+offset)<<16|
|
|
(unsigned long long)*(p+1+offset)<<8|
|
|
(unsigned long long)*(p+2+offset)<<0;
|
|
break;
|
|
case 4:
|
|
return (unsigned long long)ntohl(*(unsigned int *)(p+offset));
|
|
break;
|
|
case 5:
|
|
return (unsigned long long)*((unsigned char *)(p)+0+offset)<<32|
|
|
(unsigned long long)*((unsigned char *)(p)+1+offset)<<24|
|
|
(unsigned long long)*((unsigned char *)(p)+2+offset)<<16|
|
|
(unsigned long long)*((unsigned char *)(p)+3+offset)<<8|
|
|
(unsigned long long)*((unsigned char *)(p)+4+offset)<<0;
|
|
break;
|
|
case 6:
|
|
return (unsigned long long)*((unsigned char *)(p)+0+offset)<<40|
|
|
(unsigned long long)*((unsigned char *)(p)+1+offset)<<32|
|
|
(unsigned long long)*((unsigned char *)(p)+2+offset)<<24|
|
|
(unsigned long long)*((unsigned char *)(p)+3+offset)<<16|
|
|
(unsigned long long)*((unsigned char *)(p)+4+offset)<<8|
|
|
(unsigned long long)*((unsigned char *)(p)+5+offset)<<0;
|
|
break;
|
|
case 7:
|
|
return (unsigned long long)*((unsigned char *)(p)+0+offset)<<56|
|
|
(unsigned long long)*((unsigned char *)(p)+1+offset)<<40|
|
|
(unsigned long long)*((unsigned char *)(p)+2+offset)<<32|
|
|
(unsigned long long)*((unsigned char *)(p)+3+offset)<<24|
|
|
(unsigned long long)*((unsigned char *)(p)+4+offset)<<16|
|
|
(unsigned long long)*((unsigned char *)(p)+5+offset)<<8;
|
|
(unsigned long long)*((unsigned char *)(p)+6+offset)<<0;
|
|
break;
|
|
case 8:
|
|
return (unsigned long long)*((unsigned char *)(p)+0+offset)<<56|
|
|
(unsigned long long)*((unsigned char *)(p)+1+offset)<<48|
|
|
(unsigned long long)*((unsigned char *)(p)+2+offset)<<40|
|
|
(unsigned long long)*((unsigned char *)(p)+3+offset)<<32|
|
|
(unsigned long long)*((unsigned char *)(p)+4+offset)<<24|
|
|
(unsigned long long)*((unsigned char *)(p)+5+offset)<<16|
|
|
(unsigned long long)*((unsigned char *)(p)+6+offset)<<8|
|
|
(unsigned long long)*((unsigned char *)(p)+7+offset)<<0;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int get_quic_tlv(char *start_pos, quic_tlv_t *tlv, int len, int type, int thread_seq)
|
|
{
|
|
if(tlv->value==NULL && len>0)
|
|
{
|
|
tlv->value=(char *)dictator_malloc(thread_seq, len+1);
|
|
memset(tlv->value, 0, len+1);
|
|
tlv->length=len;
|
|
tlv->type=type;
|
|
memcpy(tlv->value, start_pos, tlv->length);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int get_stream_id(struct streaminfo *pstream, struct _quic_context* _context, char* payload, unsigned char frame_type, int *used_len)
|
|
{
|
|
int stream_len=0,offset_len=0;
|
|
|
|
_context->quic_info.frame_hdr.frame_type=frame_type;
|
|
|
|
stream_len=(frame_type&GQUIC_SPECIAL_FRAME_STREAM_ID)+1;
|
|
_context->quic_info.frame_hdr.stream_id=(unsigned int)get_variable_length(payload, *used_len, stream_len);
|
|
*used_len+=stream_len; // stream ID length
|
|
|
|
if(frame_type&GQUIC_SPECIAL_FRAME_STREAM_DLEN)
|
|
{
|
|
_context->quic_info.frame_hdr.data_len=ntohs(*(unsigned short *)(payload+*used_len));
|
|
*used_len+=2; //data length
|
|
}
|
|
|
|
offset_len=(frame_type&GQUIC_SPECIAL_FRAME_STREAM_OFFSET) ? (frame_type&GQUIC_SPECIAL_FRAME_STREAM_ID)+1 : 0;
|
|
_context->quic_info.frame_hdr.offset=get_variable_length(payload, *used_len, offset_len);
|
|
*used_len+=offset_len;
|
|
|
|
MESA_handle_runtime_log(g_quic_param.logger,
|
|
RLOG_LV_DEBUG,
|
|
"QUIC_FRAME",
|
|
"frame_type: 0X%02X stream_id: %u data length: %u offset length: %u addr: %s",
|
|
frame_type,
|
|
_context->quic_info.frame_hdr.stream_id,
|
|
_context->quic_info.frame_hdr.data_len,
|
|
offset_len,
|
|
printaddr(&pstream->addr, pstream->threadnum));
|
|
|
|
return _context->quic_info.frame_hdr.stream_id;
|
|
}
|
|
|
|
unsigned long long get_packet_number(char* data, int offset, char pkn_len)
|
|
{
|
|
switch(pkn_len)
|
|
{
|
|
case 1:
|
|
return (unsigned long long)data[offset];
|
|
break;
|
|
case 2:
|
|
return (unsigned long long)ntohs(*(unsigned short *)(data+offset));
|
|
break;
|
|
case 4:
|
|
return (unsigned long long)ntohl(*(unsigned int *)(data+offset));
|
|
break;
|
|
case 8:
|
|
return get_variable_length(data, offset, 8);;
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// GQUIC version from 0 to 43
|
|
static enum _QUIC_VERSION parse_q0to43_header(struct streaminfo *pstream, struct _quic_context* _context, char *payload, int payload_len, int *used_len)
|
|
{
|
|
int i=0,len=0;
|
|
char public_flags=0;
|
|
|
|
struct _quic_public_header *gquic_hdr=&(_context->quic_info.quic_hdr);
|
|
if(gquic_hdr==NULL)
|
|
{
|
|
gquic_hdr=(struct _quic_public_header *)dictator_malloc(pstream->threadnum, sizeof(struct _quic_public_header));
|
|
memset(gquic_hdr, 0, sizeof(struct _quic_public_header));
|
|
}
|
|
|
|
public_flags=payload[*used_len];
|
|
*used_len+=1;
|
|
|
|
//For Public Reset and Version Negotiation Packets (sent by the server) which don't have a packet number
|
|
if(!public_flags&GQUIC_PUBLIC_FLAG_PKT_NUM)
|
|
{
|
|
if(public_flags&GQUIC_PUBLIC_FLAG_VERSION) //Public Reset Packet
|
|
{
|
|
return QUIC_VERSION_UNKNOWN;// todo
|
|
}
|
|
else // Version Negotiation Packet
|
|
{
|
|
return QUIC_VERSION_UNKNOWN;
|
|
}
|
|
}
|
|
|
|
gquic_hdr->public_flags=public_flags;
|
|
|
|
if(gquic_hdr->public_flags&GQUIC_PUBLIC_FLAG_CID)
|
|
{
|
|
*(unsigned long long *)gquic_hdr->server_CID=get_variable_length(payload, *used_len, sizeof(gquic_hdr->server_CID));
|
|
*used_len+=sizeof(unsigned long long); // CID length
|
|
}
|
|
|
|
if(gquic_hdr->public_flags&GQUIC_PUBLIC_FLAG_VERSION && ntohs(*(unsigned short *)(payload+*used_len))==0x5130)
|
|
{
|
|
gquic_hdr->quic_version=(unsigned int)ntohl(*(unsigned int *)(payload+*used_len));
|
|
*used_len+=sizeof(int); // skip version
|
|
}
|
|
else
|
|
{
|
|
return QUIC_VERSION_UNKNOWN;
|
|
}
|
|
|
|
switch(gquic_hdr->public_flags&0x30) // packet number
|
|
{
|
|
case 0x30: // 6 bytes
|
|
gquic_hdr->packet_number=get_variable_length(payload, *used_len, 6);
|
|
*used_len+=6;
|
|
break;
|
|
case 0x20: // 4 bytes
|
|
gquic_hdr->packet_number=(unsigned long long)ntohl(*(unsigned int *)(payload+*used_len));
|
|
*used_len+=4;
|
|
break;
|
|
case 0x10: // 2bytes
|
|
gquic_hdr->packet_number=(unsigned long long)ntohs(*(unsigned short *)(payload+*used_len));
|
|
*used_len+=2;
|
|
break;
|
|
default: // 1 byte
|
|
gquic_hdr->packet_number=payload[*used_len];
|
|
*used_len+=1;
|
|
break;
|
|
}
|
|
|
|
if(gquic_hdr->public_flags==GQUIC_PUBLIC_FLAG_NONCE)
|
|
{
|
|
*used_len+=32; //diversification nonce
|
|
}
|
|
|
|
if(gquic_hdr->public_flags&GQUIC_PUBLIC_FLAG_VERSION)
|
|
{
|
|
// Version 11 reduced the length of null encryption authentication tag from 16 to 12 bytes
|
|
if(gquic_hdr->quic_version > GQUIC_VERSION_Q010)
|
|
{
|
|
*used_len+=12;
|
|
}
|
|
else
|
|
{
|
|
*used_len+=16;
|
|
}
|
|
|
|
// Version 34 removed entropy bits from packets and ACK frames,
|
|
// removed private flag from packet header and changed the ACK format to specify ranges of packets acknowledged rather than missing ranges.
|
|
if(gquic_hdr->quic_version < GQUIC_VERSION_Q034)
|
|
{
|
|
*used_len+=1; //private flags
|
|
}
|
|
}
|
|
|
|
_context->is_quic==QUIC_TRUE;
|
|
|
|
MESA_handle_runtime_log(g_quic_param.logger,
|
|
RLOG_LV_DEBUG,
|
|
"QUIC_IDETIFY",
|
|
"pub_flags: 0X%02X conection ID:[ destination: %llu ] version: Q%03u packet number: %llu dir(1: C2S;2: S2C): %d addr: %s",
|
|
gquic_hdr->public_flags,
|
|
*(unsigned long long *)gquic_hdr->server_CID,
|
|
(((gquic_hdr->quic_version>>8)&0x0000000F)*10) + ((gquic_hdr->quic_version)&0x0000000F),
|
|
gquic_hdr->packet_number,
|
|
pstream->curdir,
|
|
printaddr(&pstream->addr, pstream->threadnum));
|
|
|
|
return (enum _QUIC_VERSION)gquic_hdr->quic_version;
|
|
}
|
|
|
|
enum _QUIC_VERSION parse_quic_header(struct streaminfo *pstream, struct _quic_context* _context, char *payload, int payload_len, int *used_len)
|
|
{
|
|
int i=0,len=0;
|
|
char client_CID[MAX_CONNECT_ID_LEN*2]={0};
|
|
char server_CID[MAX_CONNECT_ID_LEN*2]={0};
|
|
|
|
struct _quic_public_header *long_hdr=&(_context->quic_info.quic_hdr);
|
|
|
|
long_hdr->public_flags=payload[*used_len];
|
|
*used_len+=1; //skip public flags
|
|
|
|
if(long_hdr->public_flags&0x80)
|
|
{
|
|
long_hdr->quic_version=(unsigned int)ntohl(*(unsigned int *)(payload+*used_len));
|
|
*used_len+=sizeof(int); // skip version
|
|
|
|
long_hdr->client_CID_len=(payload[*used_len]&0xF) ? (payload[*used_len]&0xF)+3 : 0;
|
|
long_hdr->server_CID_len=((payload[*used_len]>>4)&0xF) ? ((payload[*used_len]>>4)&0xF)+3 : 0;
|
|
*used_len+=sizeof(char); // both connection_id length
|
|
|
|
memcpy(long_hdr->server_CID, (void *)(payload+*used_len), long_hdr->server_CID_len);
|
|
*used_len+=long_hdr->server_CID_len; // Destination connection_id length
|
|
memcpy(long_hdr->client_CID, (void *)(payload+*used_len), long_hdr->client_CID_len);
|
|
*used_len+=long_hdr->client_CID_len; // source connection_id length
|
|
}
|
|
else
|
|
{
|
|
if(pstream->curdir==DIR_C2S)// short header only destination connection ID
|
|
{
|
|
*used_len+=long_hdr->server_CID_len; // every packet destination connection ID is same
|
|
}
|
|
}
|
|
|
|
len=(long_hdr->public_flags&0x03)+1;
|
|
long_hdr->packet_number=get_packet_number(payload, *used_len, len);
|
|
*used_len+=len;
|
|
|
|
*used_len+=12; //message authentication hash
|
|
|
|
_context->is_quic==QUIC_TRUE;
|
|
|
|
for(i=0,len=0;i<long_hdr->server_CID_len; i++)
|
|
{
|
|
len+=snprintf(server_CID+len, sizeof(server_CID)-len, "%02X", long_hdr->server_CID[i]);
|
|
}
|
|
|
|
for(i=0,len=0;i<long_hdr->client_CID_len; i++)
|
|
{
|
|
len+=snprintf(client_CID+len, sizeof(client_CID)-len, "%02X", long_hdr->client_CID[i]);
|
|
}
|
|
|
|
MESA_handle_runtime_log(g_quic_param.logger,
|
|
RLOG_LV_DEBUG,
|
|
"QUIC_IDETIFY",
|
|
"pub_flags: 0X%02X conection ID:[ destination: %s source: %s ] version: Q%03u packet number: %llu dir(1: C2S;2: S2C): %d addr: %s",
|
|
long_hdr->public_flags,
|
|
server_CID,
|
|
client_CID,
|
|
(((long_hdr->quic_version>>8)&0x0000000F)*10) + ((long_hdr->quic_version)&0x0000000F),
|
|
long_hdr->packet_number,
|
|
pstream->curdir,
|
|
printaddr(&pstream->addr, pstream->threadnum));
|
|
|
|
return (enum _QUIC_VERSION)long_hdr->quic_version;
|
|
}
|
|
|
|
enum _QUIC_VERSION is_quic_protocol(struct streaminfo *pstream, struct _quic_context* _context, char *payload, int payload_len, int *used_len)
|
|
{
|
|
int i=0,len=0;
|
|
size_t s_id_len=0,d_id_len=0;
|
|
char d_CID[128]={0}, s_CID[128]={0};
|
|
unsigned char s_connection_id[MAX_CONNECT_ID_LEN]={0};
|
|
unsigned char d_connection_id[MAX_CONNECT_ID_LEN]={0};
|
|
enum _QUIC_VERSION quic_version=QUIC_VERSION_UNKNOWN;
|
|
|
|
if(_context->quic_info.quic_hdr.quic_version!=QUIC_VERSION_UNKNOWN)
|
|
{
|
|
//
|
|
quic_version=(enum _QUIC_VERSION)(_context->quic_info.quic_hdr.quic_version);
|
|
}
|
|
else
|
|
{
|
|
// The most significant bit (0x80) of byte 0 (the first byte) is set to 1 for long headers
|
|
(payload[*used_len]&0x80) ? (quic_version=(enum _QUIC_VERSION)ntohl(*(unsigned int *)(payload+(*used_len+1)))) : QUIC_VERSION_UNKNOWN;
|
|
}
|
|
|
|
switch(quic_version) // +1 meaning: skip public flags
|
|
{
|
|
case GQUIC_VERSION_Q046:
|
|
quic_version=parse_quic_header(pstream, _context, payload, payload_len, used_len);
|
|
return quic_version;
|
|
break;
|
|
//case IETF: unsupport
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
// Q001~Q043: 0x80 is currently unused, and must be set to 0
|
|
if(payload[*used_len]>0x80)
|
|
{
|
|
return QUIC_VERSION_UNKNOWN;
|
|
}
|
|
|
|
return parse_q0to43_header(pstream, _context, payload, payload_len, used_len);
|
|
}
|
|
|
|
int parse_extension_tag(struct streaminfo *pstream, struct _quic_stream **quic_stream, void *a_packet, char *payload, int payload_len, int *used_len, int tag_num)
|
|
{
|
|
int ret=0,tag_used_num=0;
|
|
int tag_type,skip_tsg=0;
|
|
int total_tag_len=0,tag_len=0;
|
|
int tag_offset_end=0,pre_tag_offset_end=0;
|
|
|
|
struct _quic_stream *stream=*quic_stream;
|
|
int tag_value_start=tag_num*4*2+(*used_len); // skip length of type and offset, type(offset)=szieof(int)
|
|
|
|
if(stream==NULL)
|
|
{
|
|
stream=(struct _quic_stream *)dictator_malloc(pstream->threadnum, sizeof(struct _quic_stream));
|
|
memset(stream, 0, sizeof(struct _quic_stream));
|
|
stream->ext_tags=(quic_tlv_t *)dictator_malloc(pstream->threadnum, tag_num*sizeof(quic_tlv_t));
|
|
memset(stream->ext_tags, 0, tag_num*sizeof(quic_tlv_t));
|
|
*quic_stream=stream;
|
|
}
|
|
else
|
|
{
|
|
quic_release_exts(pstream->threadnum, stream->ext_tags, stream->ext_tag_num);
|
|
stream->ext_tags=(quic_tlv_t *)dictator_malloc(pstream->threadnum, tag_num*sizeof(quic_tlv_t));
|
|
memset(stream->ext_tags, 0, tag_num*sizeof(quic_tlv_t));
|
|
*quic_stream=stream;
|
|
stream->ext_tag_num=0;
|
|
stream->count++;
|
|
}
|
|
|
|
while(tag_num>tag_used_num)
|
|
{
|
|
tag_type=ntohl(*(unsigned int *)(payload+*used_len));
|
|
*used_len+=sizeof(int);
|
|
|
|
tag_offset_end=*(unsigned int *)(payload+*used_len);
|
|
*used_len+=sizeof(int);
|
|
|
|
tag_len=tag_offset_end-pre_tag_offset_end;
|
|
if(tag_len<0 || (tag_offset_end>=payload_len) || (tag_len>payload_len-tag_value_start))
|
|
{
|
|
return -1;
|
|
}
|
|
|
|
switch(tag_type)
|
|
{
|
|
case TAG_PAD:
|
|
break;
|
|
case TAG_VER:
|
|
stream->ver_idx=stream->ext_tag_num;
|
|
get_quic_tlv(payload+tag_value_start, &stream->ext_tags[stream->ext_tag_num], tag_len, tag_type, pstream->threadnum);
|
|
*(unsigned int *)(stream->ext_tags[stream->ext_tag_num].value)=(unsigned int)ntohl(*(unsigned int *)(stream->ext_tags[stream->ext_tag_num].value));
|
|
MESA_handle_runtime_log(g_quic_param.logger,
|
|
RLOG_LV_DEBUG,
|
|
"QUIC_VERSION",
|
|
"Quic version: 0X%X addr: %s",
|
|
*(unsigned int *)(stream->ext_tags[stream->ext_tag_num].value),
|
|
printaddr(&pstream->addr, pstream->threadnum));
|
|
break;
|
|
case TAG_UAID:
|
|
stream->ua_idx=stream->ext_tag_num;
|
|
get_quic_tlv(payload+tag_value_start, &stream->ext_tags[stream->ext_tag_num], tag_len, tag_type, pstream->threadnum);
|
|
MESA_handle_runtime_log(g_quic_param.logger,
|
|
RLOG_LV_DEBUG,
|
|
"QUIC_UA",
|
|
"User Agent: %s addr: %s",
|
|
stream->ext_tags[stream->ext_tag_num].value,
|
|
printaddr(&pstream->addr, pstream->threadnum));
|
|
stream->ext_tag_num++;
|
|
break;
|
|
case TAG_SNI:
|
|
stream->sni_idx=stream->ext_tag_num;
|
|
get_quic_tlv(payload+tag_value_start, &stream->ext_tags[stream->ext_tag_num], tag_len, tag_type, pstream->threadnum);
|
|
MESA_handle_runtime_log(g_quic_param.logger,
|
|
RLOG_LV_DEBUG,
|
|
"QUIC_SNI",
|
|
"SNI: %s addr: %s",
|
|
stream->ext_tags[stream->ext_tag_num].value,
|
|
printaddr(&pstream->addr, pstream->threadnum));
|
|
stream->ext_tag_num++;
|
|
break;
|
|
default:
|
|
get_quic_tlv(payload+tag_value_start, &stream->ext_tags[stream->ext_tag_num], tag_len, tag_type, pstream->threadnum);
|
|
stream->ext_tag_num++;
|
|
break;
|
|
}
|
|
|
|
tag_used_num++;
|
|
tag_value_start+=tag_len;
|
|
total_tag_len+=tag_len;
|
|
pre_tag_offset_end=tag_offset_end;
|
|
}
|
|
|
|
*used_len += total_tag_len;
|
|
|
|
return ret;
|
|
}
|
|
|
|
#if 0
|
|
int gquic_frame_type_ack(struct quic_stream* a_quic_stream, char * quic_data, UINT32 quic_data_len, UINT8 frame_type, UINT32 *used_len)
|
|
{
|
|
UINT8 num_timestamp, num_ranges, num_revived, num_blocks;
|
|
UINT32 len_largest_observed=0, len_missing_packet=0;
|
|
|
|
*used_len+=1;
|
|
len_largest_observed = read_largest_observed_len(frame_type);
|
|
len_missing_packet = read_missing_packet_len(frame_type);
|
|
//No longer Entropy after Q034
|
|
if(a_quic_stream->version < 34)
|
|
{
|
|
//Send Entropy
|
|
*used_len += 1;
|
|
*used_len += len_largest_observed;
|
|
*used_len += 2; //ack delay time
|
|
strncpy((char*)&num_timestamp, quic_data+*used_len,1);
|
|
*used_len += 1;
|
|
if(num_timestamp > 0)
|
|
{
|
|
*used_len += 1;
|
|
*used_len += 4;
|
|
*used_len += (num_timestamp - 1)*(1+2);
|
|
}
|
|
if(frame_type & ACK_N)
|
|
{
|
|
strncpy((char*)&num_ranges, quic_data+*used_len,1);
|
|
*used_len += 1;
|
|
|
|
*used_len += num_ranges*(len_missing_packet+1);
|
|
|
|
strncpy((char*)&num_revived, quic_data+*used_len,1);
|
|
*used_len += 1;
|
|
|
|
//Num Revived x Length Largest Observed
|
|
*used_len += num_revived*len_largest_observed;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
*used_len += len_largest_observed; //Largest Acked
|
|
*used_len += 2; //Largest Acked Delta Time
|
|
|
|
if(frame_type & ACK_N) //Ack Block
|
|
{
|
|
strncpy((char*)&num_blocks, quic_data+*used_len,1);
|
|
*used_len += 1;
|
|
}
|
|
|
|
*used_len += len_missing_packet; //First Ack Block Length
|
|
if(num_blocks)
|
|
{
|
|
//Gap to next block
|
|
*used_len += 1;
|
|
num_blocks -= 1;
|
|
*used_len += (num_blocks - 1)*len_missing_packet;
|
|
}
|
|
|
|
strncpy((char*)&num_timestamp, quic_data+*used_len,1); //Timestamp
|
|
*used_len += 1;
|
|
if(num_timestamp > 0)
|
|
{
|
|
*used_len += 1; //Delta Largest Acked
|
|
*used_len += 4; //Time Since Largest Acked
|
|
|
|
//Num Timestamp x (Delta Largest Acked + Time Since Previous Timestamp)
|
|
*used_len += (num_timestamp - 1)*(1+2);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
// return value: Have no meaning, only numerical value
|
|
int gquic_frame_type_control(struct quic_stream* a_quic_stream, char * quic_data, UINT32 quic_data_len, UINT8 frame_type, uint32_t pkt_num_len, UINT32 *used_len)
|
|
{
|
|
int len_reason;
|
|
*used_len+=1;
|
|
|
|
switch(frame_type)
|
|
{
|
|
case RST_STREAM:
|
|
*used_len +=4; //stream id
|
|
*used_len+=8; //Byte Offset
|
|
*used_len+=4; //Error Code
|
|
a_quic_stream->fin_flag=QUIC_TRUE;
|
|
break;
|
|
case CONNECTION_CLOSE:
|
|
len_reason = 0;
|
|
*used_len += 4; //Error Code
|
|
len_reason = a_pntoh16(quic_data, *used_len); //Reason Phrase Length
|
|
*used_len += 2;
|
|
//Reason Phrase,If length remaining == len_reason, it is Connection Close
|
|
if(get_remaining_len(quic_data_len, *used_len) == len_reason)
|
|
{
|
|
return QUIC_DATA;
|
|
}
|
|
a_quic_stream->fin_flag=(a_quic_stream->fin_flag==QUIC_FALSE) ? QUIC_HALF_CLOSE : QUIC_TRUE;
|
|
break;
|
|
case GOAWAY:
|
|
len_reason = 0;
|
|
*used_len += 4; //Error Code
|
|
*used_len += 4; //Last Good Stream ID
|
|
len_reason = a_pntoh16(quic_data, *used_len); //Reason Phrase Length
|
|
*used_len += 2;
|
|
*used_len += len_reason; //Reason Phrase
|
|
break;
|
|
case WINDOW_UPDATE:
|
|
*used_len += 4; //Stream ID
|
|
*used_len += 8; //Byte Offset
|
|
break;
|
|
case BLOCKED:
|
|
*used_len += 4; //Stream ID
|
|
break;
|
|
case STOP_WAITING:
|
|
//No longer Entropy after Q034
|
|
if(a_quic_stream->version < 34)
|
|
{
|
|
*used_len += 1; // Send Entropy
|
|
}
|
|
//Least Unacked Delta
|
|
*used_len += pkt_num_len;
|
|
break;
|
|
case PING: //No Payload
|
|
case PADDING:
|
|
default:
|
|
return QUIC_FALSE;
|
|
break;
|
|
}
|
|
|
|
return QUIC_TRUE;
|
|
}
|
|
#endif
|
|
|
|
int gquic_frame_type_stream(struct streaminfo *pstream, struct _quic_context* _context, char *payload, int payload_len, int *used_len, char frame_type, void *a_packet)
|
|
{
|
|
int ret=0;
|
|
unsigned short tag_num = 0;
|
|
unsigned int stream_id, message_tag;
|
|
|
|
stream_id=get_stream_id(pstream, _context, payload, frame_type, used_len);
|
|
|
|
message_tag=(unsigned int)ntohl(*(unsigned int *)(payload+*used_len));
|
|
*used_len+=4;
|
|
|
|
tag_num=*(unsigned short *)(payload+*used_len);
|
|
*used_len+=2; //tag_num
|
|
*used_len+=2; //padding
|
|
|
|
switch(message_tag)
|
|
{
|
|
case CHLO: //MTAG_CHLO;
|
|
ret=parse_extension_tag(pstream, &_context->quic_info.client_hello, a_packet, payload, payload_len, used_len, tag_num);
|
|
if(ret>=0)
|
|
{
|
|
ret=quic_callPlugins(pstream, _context, (void *)(_context->quic_info.client_hello), sizeof(void *), QUIC_CLIENT_HELLO_MASK, a_packet);
|
|
}
|
|
break;
|
|
case SHLO: //MTAG_SHLO;
|
|
ret=parse_extension_tag(pstream, &_context->quic_info.server_hello, a_packet, payload, payload_len, used_len, tag_num);
|
|
if(ret>=0)
|
|
{
|
|
ret=quic_callPlugins(pstream, _context, (void *)(_context->quic_info.server_hello), sizeof(void *), QUIC_SERVER_HELLO_MASK, a_packet);
|
|
}
|
|
break;
|
|
case REJ: //MTAG_REJ;
|
|
ret=parse_extension_tag(pstream, &_context->quic_info.rej, a_packet, payload, payload_len, used_len, tag_num);
|
|
if(ret>=0)
|
|
{
|
|
ret=quic_callPlugins(pstream, _context, (void *)(_context->quic_info.rej), sizeof(void *), QUIC_SERVER_HELLO_MASK, a_packet);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return (ret>=0) ? ret : APP_STATE_GIVEME;
|
|
}
|
|
|
|
//frame type->stream->offset->data length
|
|
int gquic_proc_unencrypt(struct streaminfo *pstream, struct _quic_context* _context, void *a_packet, char * payload, int payload_len, int *used_len)
|
|
{
|
|
unsigned int ret=0;
|
|
unsigned char frame_type;
|
|
|
|
while(*used_len<payload_len)
|
|
{
|
|
frame_type=payload[*used_len];
|
|
*used_len+=1; //skip frame_type
|
|
|
|
switch(frame_type)
|
|
{
|
|
case GQUIC_REGULAR_FRAME_PADDING:
|
|
return 0; //todo
|
|
break;
|
|
case GQUIC_REGULAR_FRAME_RST_STREAM:
|
|
return 0; //todo
|
|
break;
|
|
case GQUIC_REGULAR_FRAME_CONNECTION_CLOSE:
|
|
return 0; //todo
|
|
break;
|
|
case GQUIC_REGULAR_FRAME_GOAWAY:
|
|
return 0; //todo
|
|
break;
|
|
case GQUIC_REGULAR_FRAME_WINDOW_UPDATE:
|
|
return 0; //todo
|
|
break;
|
|
case GQUIC_REGULAR_FRAME_BLOCKED:
|
|
return 0; //todo
|
|
break;
|
|
case GQUIC_REGULAR_FRAME_STOP_WAITING:
|
|
return 0; //todo
|
|
break;
|
|
case GQUIC_REGULAR_FRAME_PING:
|
|
return 0; //todo
|
|
break;
|
|
default: //Regular Frame Types
|
|
if(frame_type&GQUIC_SPECIAL_FRAME_STREAM)
|
|
{
|
|
ret=gquic_frame_type_stream(pstream, _context, payload, payload_len, used_len, frame_type, a_packet);
|
|
}
|
|
else if(frame_type&GQUIC_SPECIAL_FRAME_ACK)
|
|
{
|
|
return 0; //todo
|
|
}
|
|
else if(frame_type&GQUIC_SPECIAL_FRAME_CONGEST_FB)
|
|
{
|
|
return 0; //todo
|
|
}
|
|
else
|
|
{
|
|
return -1;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
return APP_STATE_GIVEME;
|
|
}
|
|
|
|
|
|
//QUIC_DATA:is quic data pcap;QUIC_TRUE:is handshake pcap;QUIC_RETURN_DROPME:not quic protocol;
|
|
int parse_gquic_Q046(struct streaminfo *pstream, struct _quic_context* _context, void *a_packet, char * payload, int payload_len, int *used_len)
|
|
{
|
|
unsigned char frame_type;
|
|
unsigned short tag_num=0;
|
|
unsigned int stream_id, message_tag;
|
|
|
|
while(*used_len < payload_len)
|
|
{
|
|
frame_type=payload[*used_len];
|
|
*used_len+=1; //skip frame_type
|
|
|
|
if(frame_type&IQUIC_FRAME_STREAM_HEX08)
|
|
{
|
|
gquic_frame_type_stream(pstream, _context, payload, payload_len, used_len, frame_type, a_packet);
|
|
}
|
|
else
|
|
{
|
|
return 0; //todo
|
|
}
|
|
}
|
|
|
|
return QUIC_RETURN_NORM;
|
|
}
|
|
|
|
//cid->version->nounce->pkt num->ahn hash(12)
|
|
int quic_process(struct streaminfo *pstream, struct _quic_context* _context, int thread_seq, void* a_packet)
|
|
{
|
|
int used_len=0;
|
|
int ret=APP_STATE_GIVEME;
|
|
enum _QUIC_VERSION is_gquic=QUIC_VERSION_UNKNOWN;
|
|
struct udpdetail *udp_detail=pstream->pudpdetail;
|
|
|
|
if(udp_detail->pdata==NULL || udp_detail->datalen<=0)
|
|
{
|
|
return APP_STATE_GIVEME;
|
|
}
|
|
|
|
is_gquic=is_quic_protocol(pstream, _context, (char *)udp_detail->pdata, udp_detail->datalen, &used_len);
|
|
if(is_gquic!=QUIC_VERSION_UNKNOWN)
|
|
{
|
|
if(_context->quic_info.quic_hdr.packet_number==1)
|
|
{
|
|
ret=quic_callPlugins(pstream, _context, &(_context->quic_info.quic_hdr.quic_version), sizeof(_context->quic_info.quic_hdr.quic_version), QUIC_VERSION_MASK, a_packet);
|
|
if(ret&APP_STATE_DROPME | ret&APP_STATE_DROPPKT)
|
|
{
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
switch(is_gquic)
|
|
{
|
|
case GQUIC_VERSION_Q043:
|
|
ret=gquic_proc_unencrypt(pstream, _context, a_packet, (char *)udp_detail->pdata, udp_detail->datalen, &used_len);
|
|
break;
|
|
case GQUIC_VERSION_Q046:
|
|
ret=parse_gquic_Q046(pstream, _context, a_packet, (char *)udp_detail->pdata, udp_detail->datalen, &used_len);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
if(_context->is_quic==QUIC_TRUE)
|
|
{
|
|
return APP_STATE_GIVEME;
|
|
}
|
|
|
|
return APP_STATE_DROPME;;
|
|
}
|
|
|