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mesa-platform-gquic/src/gquic_process.c
2020-05-29 15:10:01 +08:00

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;;
}