Initial commitv1.0.1

1 files changed, 1010 insertions, 0 deletions

diff --git a/src/quic_process.cpp b/src/quic_process.cpp
new file mode 100644
index 0000000..3f94ad7
--- /dev/null
+++ b/src/quic_process.cpp
@@ -0,0 +1,1010 @@
+#include <stdio.h>
+#include <assert.h>
+#include <stdbool.h>
+#include <stdint.h>
+#include <sys/time.h>
+#include <arpa/inet.h>
+#include <MESA/MESA_handle_logger.h>
+#include "quic_entry.h"
+#include "quic_process.h"
+#include "quic_deprotection.h"
+#include "quic_header.h"
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+#include "quic_util.h"
+#include <stellar/stellar.h>
+#include <stellar/session.h>
+#include <stellar/session_mq.h>
+#include <stellar/session_exdata.h>
+#ifdef __cplusplus
+}
+#endif
+
+struct quic_client_hello_msg_hdr
+{
+	uint8_t handshake_type;
+	uint8_t client_hello_len[3];
+	uint16_t tls_version;
+	uint8_t random[32];
+};
+
+static int check_port(const struct quic_param *quic_plugin_env, unsigned short port)
+{
+	for (int i = 0; i < quic_plugin_env->quic_port_num; i++)
+	{
+		if (quic_plugin_env->quic_port_list[i] == port)
+		{
+			return 1;
+		}
+	}
+	return 0;
+}
+
+int quic_protocol_identify(struct session *sess, struct quic_param *quic_plugin_env)
+{
+	enum session_addr_type addr_type;
+	struct session_addr *saddr = session_get0_addr(sess, &addr_type);
+	unsigned short sport, dport;
+	if (addr_type == SESSION_ADDR_TYPE_IPV4_UDP)
+	{
+		sport = saddr->ipv4.sport;
+		dport = saddr->ipv4.dport;
+	}
+	else if (addr_type == SESSION_ADDR_TYPE_IPV6_UDP)
+	{
+		sport = saddr->ipv6.sport;
+		dport = saddr->ipv6.dport;
+	}
+	else
+	{
+		return 0;
+	}
+	if (0 == (check_port(quic_plugin_env, sport) || check_port(quic_plugin_env, dport)))
+	{
+		return 0;
+	}
+	return 1;
+}
+
+static int gquic_pkn_bit2length(unsigned char bit_value)
+{
+	switch(bit_value)
+	{
+		case	0x30: return 6;
+		case	0x20: return 4;
+		case	0x10: return 2;
+		default:
+			return 1;
+	}
+	
+	return 1;
+}
+
+/*
+   for quic , the decrypted payload store in quic_dpt_t, will be freed after quic_decrypting_payload(),
+   so we need to malloc memory and copy them to quic_info.
+*/
+#if 1
+static int copy_extension_tag(const unsigned char *tag_start_pos, int tag_len, qstring *out)
+{
+	if(tag_start_pos!=NULL && tag_len>0)
+	{
+		if(out->iov_base!=NULL)
+		{
+			FREE(out->iov_base);
+		}
+
+		out->iov_base=CALLOC(1, tag_len+1);
+		memcpy((void *)out->iov_base, tag_start_pos, tag_len);
+		out->iov_len = tag_len;
+
+		return tag_len;
+	}
+
+	return 0;
+}
+#else
+static int quic_extension_tag_get0(const unsigned char *tag_start_pos, int tag_len, qstring *out)
+{
+	if(tag_start_pos!=NULL && tag_len>0)
+	{
+		out->iov_len = tag_len;
+		out->iov_base = (void *)tag_start_pos;
+		return tag_len;
+	}
+	return 0;
+}
+#endif
+
+//Source: https://wise2.ipac.caltech.edu/staff/slw/docs/html/varint_8h_source.html
+static int msb2_varint_decode(const unsigned char *buf, long *out)
+{
+	unsigned long val = buf[0] & 0x3f;
+	unsigned int nfollow = 1<<(buf[0]>>6);
+	switch (nfollow-1)
+	{
+         case 7: val = (val << 8) | buf[nfollow - 7]; /*fail through*/
+         case 6: val = (val << 8) | buf[nfollow - 6]; /*fail through*/
+         case 5: val = (val << 8) | buf[nfollow - 5]; /*fail through*/
+         case 4: val = (val << 8) | buf[nfollow - 4]; /*fail through*/
+         case 3: val = (val << 8) | buf[nfollow - 3]; /*fail through*/
+         case 2: val = (val << 8) | buf[nfollow - 2]; /*fail through*/
+         case 1: val = (val << 8) | buf[nfollow-1];
+         case 0: break;
+     }
+	*out=val;
+	
+    return nfollow;
+}
+
+/*
+
+//https://docs.google.com/document/d/1FcpCJGTDEMblAs-Bm5TYuqhHyUqeWpqrItw2vkMFsdY/edit
+
+Long Header (used for packets that are sent prior to the completion of version negotiation and establishment of 1-RTT keys):
++-+-+-+-+-+-+-+-+
+|1|1|T|T|R|R|P|P|
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+|                         Version (32)                          |
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+|DCIL(4)|SCIL(4)|
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+|               Destination Connection ID (0/64)              ...
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+|                 Source Connection ID (0/64)                 ...
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+|                      Packet Number (8/16/24/32)             ...
++-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+
+*/
+
+
+static int join_client_hello_frames(const unsigned char *payload, int payload_len, unsigned char *join_payload, int *join_payload_len)
+{
+	int joined_length=0;
+	int payload_offset=0;
+	long frame_type=0, frame_offset=0, frame_length=0;
+	
+	for(; payload_offset<payload_len; )
+	{
+		frame_type=payload[payload_offset++]; // Frame Type=1
+		if(frame_type==IQUIC_FRAME_PADDING || frame_type==IQUIC_FRAME_PING)
+		{
+			continue;
+		}
+
+		payload_offset+=msb2_varint_decode((const unsigned char *)(payload+payload_offset), &frame_offset);
+		payload_offset+=msb2_varint_decode((const unsigned char *)(payload+payload_offset), &frame_length);
+
+		if(joined_length+frame_length>(*join_payload_len) || frame_offset<0 || frame_offset+frame_length>payload_len)
+		{
+			return -1;
+		}
+		memcpy(join_payload+frame_offset, payload+payload_offset, frame_length);
+		joined_length+=frame_length;
+		payload_offset+=frame_length;
+	}
+
+	(*join_payload_len)=joined_length;
+
+	return joined_length;
+}
+
+static int parse_gquic_version_44to48_header(const char *payload, int payload_len, int *payload_offset)
+{
+	unsigned pkn_length=0;
+	unsigned char client_CID_len=0;
+	unsigned char server_CID_len=0;
+	unsigned char public_flags=payload[*payload_offset];
+	*payload_offset+=1; //skip public flags
+
+	*payload_offset+=sizeof(int); // skip version
+	
+	if((payload[*payload_offset])&GQUIC_VERSION_44to48_CID_MASK)
+	{
+		client_CID_len=(payload[*payload_offset]&GQUIC_VERSION_44to48_CID_MASK) + 3;
+	}
+
+	if((payload[*payload_offset]>>4)&GQUIC_VERSION_44to48_CID_MASK)
+	{
+		server_CID_len=((payload[*payload_offset]>>4)&GQUIC_VERSION_44to48_CID_MASK) + 3;
+	}
+
+	*payload_offset+=1;  // both connection_id length
+	*payload_offset+=server_CID_len;  // Destination connection id length
+	*payload_offset+=client_CID_len;  // source connection id length
+	
+	pkn_length=(public_flags&GQUIC_VERSION_44to48_PKN_LEN_MASK)+1;
+	*payload_offset+=pkn_length;
+
+	*payload_offset+=12;  //message authentication hash
+	
+	return 1;
+}
+
+int parse_special_frame_stream(struct quic_info* quic_info, const unsigned char *payload, int payload_len)
+{
+	int tag_num = 0;
+	int payload_offset=0;
+	unsigned int message_tag;
+	int pass_tag_num=0;
+	int ext_tag_type=0;	
+	int tag_value_start_offset=0;
+	int total_tag_len=0,one_tag_len=0;	
+	int parse_result=PARSE_RESULT_VERSION;
+	int one_tag_offset_end=0,pre_one_tag_offset_end=0;
+
+	if(payload_len-payload_offset<=8)
+	{
+		return PARSE_RESULT_VERSION;
+	}
+	
+	switch(quic_info->quic_version)
+	{
+		case	GQUIC_VERSION_Q041:
+			payload_offset+=1; // unknown
+		case	GQUIC_VERSION_Q044:
+			message_tag=(unsigned int)ntohl(*(unsigned int *)(payload+payload_offset));
+			payload_offset+=4;
+
+			tag_num=*(int *)(payload+payload_offset);
+			payload_offset+=4; //tag_num
+			break;
+		default:
+			message_tag=(unsigned int)ntohl(*(unsigned int *)(payload+payload_offset));
+			payload_offset+=4;
+
+			tag_num=*(unsigned short *)(payload+payload_offset);
+			payload_offset+=2; //tag_num
+			payload_offset+=2; //padding
+			break;
+	}
+
+	if(message_tag!=CHLO || tag_num>64 || tag_num<=0)
+	{
+		return PARSE_RESULT_VERSION;
+	}
+
+	// if(quic_info->client_hello==NULL)
+	// {
+	// 	quic_info->client_hello=(struct quic_client_hello *)CALLOC(1, sizeof(struct quic_client_hello));
+	// 	memset(quic_info->client_hello, 0, sizeof(struct quic_client_hello));
+	// }
+
+	tag_value_start_offset=payload_offset+tag_num*4*2;  // skip length of type and offset, type(offset)=szieof(int)
+
+	while(tag_num>pass_tag_num)
+	{
+		ext_tag_type=ntohl(*(unsigned int *)(payload+payload_offset));
+		payload_offset+=sizeof(int);
+		
+		one_tag_offset_end=*(unsigned int *)(payload+payload_offset);
+		payload_offset+=sizeof(int);
+		
+		one_tag_len=one_tag_offset_end-pre_one_tag_offset_end;
+		if(one_tag_len<=0 || (one_tag_offset_end>=payload_len) || (one_tag_len+tag_value_start_offset)>payload_len)
+		{
+			break;
+		}
+
+		switch(ext_tag_type)
+		{
+			case	TAG_UAID:
+				copy_extension_tag(payload+tag_value_start_offset, one_tag_len, &quic_info->user_agent);
+				parse_result=PARSE_RESULT_CLIENT_HELLO;
+				break;
+			case	TAG_SNI:
+				copy_extension_tag(payload+tag_value_start_offset, one_tag_len, &quic_info->sni);
+				parse_result=PARSE_RESULT_CLIENT_HELLO;
+				break;
+			default:
+				break;
+		}
+			
+		pass_tag_num++;
+		tag_value_start_offset+=one_tag_len;
+		total_tag_len+=one_tag_len;
+		pre_one_tag_offset_end=one_tag_offset_end;
+	}
+
+	return parse_result;
+}
+
+int parse_quic_transport_parameter(struct quic_info *quic_info, const unsigned char *quic_para, int quic_para_len)
+{
+	int one_para_length=0;
+	int para_offset=0;
+	long one_para_type=0;
+	
+	while(quic_para_len > para_offset)
+	{
+		para_offset+=msb2_varint_decode((const unsigned char *)(quic_para+para_offset), &one_para_type);
+		switch(one_para_type)
+		{
+			case	EXT_QUIC_PARAM_USER_AGENT: // 2021-10-20 deprecated
+					one_para_length=quic_para[para_offset++]; // length=1
+					if(one_para_length+para_offset>quic_para_len)
+					{
+						return 0;
+					}
+					para_offset+=copy_extension_tag(quic_para+para_offset, one_para_length, &quic_info->user_agent);
+					return 1;
+			default:
+				one_para_length=(int)(quic_para[para_offset++]); // length=1
+				if(one_para_length<0 || one_para_length>quic_para_len)
+				{
+					break;
+				}
+				para_offset+=one_para_length;
+				break;
+		}
+	}
+
+	return 0;
+}
+
+int parse_extension_server_name(struct quic_info *quic_info, const unsigned char *ext_server_name, int ext_server_name_length)
+{
+	unsigned short sni_type=0;
+	unsigned short sni_length=0;
+	unsigned short extension_offset=0;
+	unsigned short server_name_list_len=0;
+		
+	server_name_list_len=ntohs(*(unsigned short *)(ext_server_name+extension_offset));  //Server Name List length
+	if(server_name_list_len<=0 || server_name_list_len>ext_server_name_length)
+	{
+		return 0;
+	}
+	extension_offset+=2; //Server Name List length
+
+	sni_type=ext_server_name[extension_offset++];  //Server Name type
+	if(sni_type!=EXTENSION_SERVER_NAME)
+	{
+		return 0;
+	}
+
+	sni_length=ntohs(*(unsigned short*)(ext_server_name+extension_offset));  //Server Name length
+	if(sni_length<=0 || sni_length>ext_server_name_length)
+	{
+		return 0;
+	}
+	extension_offset+=2;
+
+	copy_extension_tag(ext_server_name+extension_offset, sni_length, &quic_info->sni);
+
+	return 1;
+}
+
+int parse_tls_client_hello(struct quic_info *quic_info, const unsigned char *payload, int payload_len)
+{
+	int ret=0,skip_len=0;
+	int payload_offset=0;
+	int extension_offset=0;
+	const unsigned char *extension_start_pos=NULL;	
+	int parse_result=PARSE_RESULT_VERSION;
+	unsigned short one_ext_type=0, one_ext_len=0, extension_total_len=0;
+
+	if(payload_len-payload_offset<=(int)sizeof(struct quic_client_hello_msg_hdr))
+	{
+		return PARSE_RESULT_VERSION;
+	}
+
+	// handshake type(1), client hello length(3), ssl_version(2), Random(32)
+	payload_offset+=sizeof(struct quic_client_hello_msg_hdr);
+
+	skip_len=payload[payload_offset++];   //Session ID length
+	if(payload_len-payload_offset<=skip_len)
+	{
+		return PARSE_RESULT_VERSION;
+	}
+	payload_offset+=skip_len;
+
+	skip_len=ntohs(*(unsigned short *)(payload+payload_offset));  //Ciper Suites length
+	if(payload_len-payload_offset<=skip_len+2)
+	{
+		return PARSE_RESULT_VERSION;
+	}
+	payload_offset+=skip_len+2;
+	
+	skip_len=payload[payload_offset++];   //Compression Methods
+	if(payload_len-payload_offset<skip_len)
+	{
+		return PARSE_RESULT_VERSION;
+	}
+	payload_offset+=skip_len;
+	
+	extension_total_len=ntohs(*(unsigned short *)(payload+payload_offset));  //Extension length
+	if(payload_len-payload_offset<extension_total_len)
+	{
+		return PARSE_RESULT_VERSION;
+	}
+
+	payload_offset+=2;
+
+	// if(*client_hello==NULL)
+	// {
+	// 	*client_hello=(struct quic_client_hello *)CALLOC(1, sizeof(struct quic_client_hello));
+	// 	// memset(*client_hello, 0, sizeof(struct quic_client_hello));
+	// }
+
+	extension_start_pos=payload+payload_offset;
+	
+	while(extension_total_len > extension_offset)
+	{
+		one_ext_type=ntohs(*(unsigned short *)(extension_start_pos+extension_offset));  //Extension type
+		extension_offset+=2;
+		
+		one_ext_len=ntohs(*(unsigned short *)(extension_start_pos+extension_offset));	//length
+		extension_offset+=2;
+		
+		if(extension_total_len-extension_offset<one_ext_len)
+		{
+			break;
+		}
+				
+		switch(one_ext_type)
+		{
+			case	EXTENSION_SERVER_NAME:
+				ret=parse_extension_server_name(quic_info, extension_start_pos+extension_offset, one_ext_len);
+				break;
+			case	EXTENSION_QUIC_PARAM_TLS_13:
+			case	EXTENSION_QUIC_PARAM_TLS_33:
+				ret=parse_quic_transport_parameter(quic_info, extension_start_pos+extension_offset, one_ext_len);
+				break;
+			default:
+				break;
+		}
+
+		if(ret==1)
+		{
+			ret=0;
+			parse_result=PARSE_RESULT_CLIENT_HELLO;
+		}
+		
+		extension_offset+=one_ext_len;
+	}
+	
+	return parse_result;
+}
+
+int get_chlo_total_length(const unsigned char *payload, int payload_len)
+{
+	const struct quic_client_hello_msg_hdr *chlo_hdr=(const struct quic_client_hello_msg_hdr *)payload;
+	int chlo_len=0;
+	uint8_t *p = (uint8_t *)&chlo_len;
+	p[2] = chlo_hdr->client_hello_len[0];
+	p[1] = chlo_hdr->client_hello_len[1];
+	p[0] = chlo_hdr->client_hello_len[2];
+	return chlo_len;
+}
+
+int parse_quic_decrypted_payload(struct quic_info *quic_info, const unsigned char * payload, int payload_len)
+{
+	unsigned char join_payload[MAX_CLIENT_HELLO_CHUNK_SIZE]={0};
+	int join_payload_len=sizeof(join_payload);
+	unsigned int quic_version=quic_info->quic_version;
+
+	if( (quic_version>=MVFST_VERSION_00 && quic_version<=MVFST_VERSION_0F)		||
+		(quic_version>=GQUIC_VERSION_T050 && quic_version<=GQUIC_VERSION_T059)	||
+		(quic_version>=IQUIC_VERSION_I022 && quic_version<=IQUIC_VERSION_I029)	||
+		(quic_version==IQUIC_VERSION_RFC9000)
+		)
+	{
+		join_payload_len=join_client_hello_frames(payload, payload_len, join_payload, &join_payload_len);
+		if(join_payload_len<=0)
+		{
+			return PARSE_RESULT_VERSION;
+		}
+		
+		if(join_payload[0] == QUIC_HANDSHAKE_TYPE_CLIENTHELLO)
+		{
+			return parse_tls_client_hello(quic_info, join_payload, join_payload_len);
+		}
+	}
+	else //if(quic_version>=GQUIC_VERSION_Q047 && quic_version<=GQUIC_VERSION_Q059)
+	{	
+		return parse_special_frame_stream(quic_info, payload+4, payload_len-4); // Frame type=1,offset=1,length=2
+	}
+
+	return PARSE_RESULT_VERSION;
+}
+
+int parse_quic_uncryption_payload(struct quic_info *quic_info, const unsigned char * payload, int payload_len)
+{
+	int stream_id_len=0;
+	int offset_len=0;
+	unsigned char frame_type;
+	int payload_offset=0;
+	
+	frame_type=payload[payload_offset];
+	payload_offset+=1;  //skip frame_type
+
+	//https://docs.google.com/document/d/1WJvyZflAO2pq77yOLbp9NsGjC1CHetAXV8I0fQe-B_U/edit# 
+	//Frame Type: The Frame Type byte is an 8-bit value containing various flags (1fdooossB):
+	if(frame_type&GQUIC_SPECIAL_FRAME_STREAM || (frame_type&0xC0)==GQUIC_SPECIAL_FRAME_ACK)
+	{
+		stream_id_len=(frame_type&GQUIC_SPECIAL_FRAME_STREAM_ID)+1;
+		if(payload_len-payload_offset<=stream_id_len)
+		{
+			return PARSE_RESULT_VERSION;
+		}
+			
+		payload_offset+=stream_id_len;	// stream ID length
+		
+		if(frame_type&GQUIC_SPECIAL_FRAME_STREAM_DLEN)
+		{
+			if(payload_len-payload_offset<2)
+			{
+				return PARSE_RESULT_VERSION;
+			}
+			payload_offset+=2;  //data length
+		}
+
+		if(frame_type&GQUIC_SPECIAL_FRAME_STREAM_OFFSET)
+		{//The next three 'ooo' bits encode the length of the Offset header field as 0, 16, 24, 32, 40, 48, 56, or 64 bits long.
+			offset_len= (((frame_type&GQUIC_SPECIAL_FRAME_STREAM_OFFSET))>>2)+1;
+			if(payload_len-payload_offset<=offset_len)
+			{
+				return PARSE_RESULT_VERSION;
+			}
+			payload_offset+=offset_len;  //data length
+		}
+		
+		return parse_special_frame_stream(quic_info, payload+payload_offset, payload_len-payload_offset);
+	}
+	
+	return PARSE_RESULT_VERSION;
+}
+
+/*
+//https://docs.google.com/document/d/1WJvyZflAO2pq77yOLbp9NsGjC1CHetAXV8I0fQe-B_U/edit
+
+--- src
+     0        1        2        3        4            8
++--------+--------+--------+--------+--------+---    ---+
+| Public |    Connection ID (64)    ...                 | ->
+|Flags(8)|      (optional)                              |
++--------+--------+--------+--------+--------+---    ---+
+
+     9       10       11        12   
++--------+--------+--------+--------+
+|      QUIC Version (32)            | ->
+|         (optional)                |                           
++--------+--------+--------+--------+
+
+
+    13       14       15        16      17       18       19       20
++--------+--------+--------+--------+--------+--------+--------+--------+
+|                        Diversification Nonce                          | ->
+|                              (optional)                               |
++--------+--------+--------+--------+--------+--------+--------+--------+
+
+    21       22       23        24      25       26       27       28
++--------+--------+--------+--------+--------+--------+--------+--------+
+|                   Diversification Nonce Continued                     | ->
+|                              (optional)                               |
++--------+--------+--------+--------+--------+--------+--------+--------+
+
+    29       30       31        32      33       34       35       36
++--------+--------+--------+--------+--------+--------+--------+--------+
+|                   Diversification Nonce Continued                     | ->
+|                              (optional)                               |
++--------+--------+--------+--------+--------+--------+--------+--------+
+
+    37       38       39        40      41       42       43       44
++--------+--------+--------+--------+--------+--------+--------+--------+
+|                   Diversification Nonce Continued                     | ->
+|                              (optional)                               |
++--------+--------+--------+--------+--------+--------+--------+--------+
+
+
+    45      46       47        48       49       50
++--------+--------+--------+--------+--------+--------+
+|           Packet Number (8, 16, 32, or 48)          |
+|                  (variable length)                  |
++--------+--------+--------+--------+--------+--------+
+
+*/
+enum QUIC_VERSION_T identify_gquic_version0to43(const char *payload, int payload_len, int *payload_offset)
+{
+	unsigned char pkn_length=0;
+	unsigned char public_flags=0;
+	enum QUIC_VERSION_T quic_version=QUIC_VERSION_UNKNOWN;
+
+	public_flags=payload[*payload_offset];
+	*payload_offset+=1;
+
+	if(!(public_flags&GQUIC_PUBLIC_FLAG_VERSION))
+	{
+		return QUIC_VERSION_UNKNOWN;
+	}
+
+	/*
+		0x08 = Indicates the full 8 byte Connection ID is present in the packet. 
+		This must be set in all packets until negotiated to a different value for a given direction
+		(e.g., client may request fewer bytes of the Connection ID be presented)
+	*/
+	if(public_flags&GQUIC_PUBLIC_FLAG_CID)
+	{
+		*payload_offset+=8; // CID length
+	}
+	
+	if(public_flags&GQUIC_PUBLIC_FLAG_VERSION && (*(unsigned char *)(payload+*payload_offset)==0x51))
+	{
+		quic_version=(enum QUIC_VERSION_T)ntohl(*(unsigned int *)(payload+*payload_offset));
+		*payload_offset+=sizeof(int); // skip version
+	}
+	
+	if(quic_version<GQUIC_VERSION_Q001 || quic_version>GQUIC_VERSION_Q043)
+	{
+		return QUIC_VERSION_UNKNOWN;
+	}
+
+	pkn_length=gquic_pkn_bit2length(public_flags&GQUIC_VERSION_0to43_PKN_LEN_MASK);
+	*payload_offset+=pkn_length; // packet number length
+	
+	if(public_flags==GQUIC_PUBLIC_FLAG_NONCE)
+	{
+		*payload_offset+=32; //diversification nonce
+	}
+
+	// Version 11 reduced the length of null encryption authentication tag  from 16 to 12 bytes
+	if(quic_version > GQUIC_VERSION_Q010)
+	{
+		*payload_offset+=12;
+	}
+	else
+	{
+		*payload_offset+=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(quic_version < GQUIC_VERSION_Q034)
+	{
+		*payload_offset+=1;  //private flags
+	}
+
+	return quic_version;	
+}
+
+enum QUIC_VERSION_T identify_quic_version(const char *payload, int payload_len, int *payload_offset)
+{
+	enum QUIC_VERSION_T quic_version=(enum QUIC_VERSION_T)ntohl(*(unsigned int *)(payload+(*payload_offset+1)));
+	if(quic_version>=GQUIC_VERSION_Q044 && quic_version<=GQUIC_VERSION_Q048)
+	{
+		parse_gquic_version_44to48_header(payload, payload_len, payload_offset);
+		return quic_version;	
+	}
+	else if(
+			(quic_version==GQUIC_VERSION_Q099) ||
+			(quic_version==PICOQUIC_VERSION_30) ||
+			(quic_version==PQUIC_VERSION_PROX) ||
+			(quic_version==GQUIC_VERSION_T099) ||
+			(quic_version>=GQUIC_VERSION_Q049 && quic_version<=GQUIC_VERSION_Q050) ||
+			(quic_version>=GQUIC_VERSION_Q051 && quic_version<=GQUIC_VERSION_Q059) ||
+			(quic_version>=GQUIC_VERSION_T048 && quic_version<=GQUIC_VERSION_T049) ||
+			(quic_version>=GQUIC_VERSION_T050 && quic_version<=GQUIC_VERSION_T059) ||
+			(quic_version>=QUANT_VERSION_00 && quic_version<=QUANT_VERSION_FF) ||
+			(quic_version>=QUIC_GO_VERSION_00 && quic_version<=QUIC_GO_VERSION_FF) ||
+			(quic_version>=QUICLY_VERSION_00 && quic_version<=QUICLY_VERSION_FF) ||
+			(quic_version>=MSQUIC_VERSION_00 && quic_version<=MSQUIC_VERSION_0F) ||
+			(quic_version>=MOZQUIC_VERSION_00 && quic_version<=MOZQUIC_VERSION_0F) ||
+			(quic_version>=MVFST_VERSION_00 && quic_version<=MVFST_VERSION_0F) ||
+			(quic_version>=IQUIC_VERSION_I001 && quic_version<=IQUIC_VERSION_I032) ||
+			(quic_version==IQUIC_VERSION_RFC9000)
+	)
+	{		
+		return quic_version;
+	}
+
+	return QUIC_VERSION_UNKNOWN;
+}
+
+enum QUIC_VERSION_T is_quic_protocol(const char *payload, int payload_len, int *payload_offset)
+{
+	enum QUIC_VERSION_T quic_version=QUIC_VERSION_UNKNOWN;
+	unsigned char frame_type=(unsigned char)(payload[0]);
+
+	if(payload_len<=4)
+	{
+		return QUIC_VERSION_UNKNOWN;
+	}
+
+	if(frame_type&QUIC_LONG_HEADER_MASK)
+	{
+		quic_version=identify_quic_version(payload, payload_len, payload_offset);
+	}
+	else if(frame_type<QUIC_LONG_HEADER_MASK)
+	{		
+		quic_version=identify_gquic_version0to43(payload, payload_len, payload_offset);
+	}
+	else
+	{
+		return QUIC_VERSION_UNKNOWN;
+	}
+	
+	return quic_version;
+}
+
+//
+static void quic_chlo_chunk_assemble(struct quic_buffer *qbuf, unsigned char *new_payload, int new_len)
+{
+	if(NULL == new_payload || new_len <= 0){
+		return;
+	}
+	if(NULL == qbuf->buffer){
+		qbuf->buffer = (unsigned char *)calloc(1, MAX_CLIENT_HELLO_CHUNK_SIZE);
+		qbuf->max_size = MAX_CLIENT_HELLO_CHUNK_SIZE;
+	}
+	int max_copy_len = MIN((int)(qbuf->max_size - qbuf->datalen), new_len);
+	memcpy(qbuf->buffer + qbuf->datalen, new_payload, max_copy_len);
+	qbuf->datalen += max_copy_len;
+}
+
+/*
+	1: is chlo, is complete.
+	0: is chlo, is fragment;
+	-1: not support
+*/
+static int quic_chlo_is_complete(enum QUIC_VERSION_T quic_version, const unsigned char *payload, int payload_len)
+{
+	if(!( (quic_version>=MVFST_VERSION_00 && quic_version<=MVFST_VERSION_0F)	||
+		(quic_version>=GQUIC_VERSION_T050 && quic_version<=GQUIC_VERSION_T059)	||
+		(quic_version>=IQUIC_VERSION_I022 && quic_version<=IQUIC_VERSION_I029)	||
+		(quic_version==IQUIC_VERSION_RFC9000)))
+	{
+		return -1;
+	}
+
+	if((payload[0] != IQUIC_FRAME_CRYPTO) && (payload[0] != 0x08)) 
+	{
+		return -1;
+	}
+	int payload_offset = 0;
+	long frame_offset, frame_length;
+	payload_offset = 1; //skip frame type
+	payload_offset+=msb2_varint_decode(payload+payload_offset, &frame_offset);
+	payload_offset+=msb2_varint_decode(payload+payload_offset, &frame_length);
+
+	if(payload[payload_offset] != QUIC_HANDSHAKE_TYPE_CLIENTHELLO)
+	{
+		return -1;
+	}
+	int expect_len = get_chlo_total_length(payload + payload_offset, payload_len-payload_offset);
+	if(payload_len-payload_offset >= expect_len){
+		return 1;
+	}
+	return 0;
+}
+
+static enum PARSE_RESULT quic_decrypting_payload(struct quic_context *qcontext, unsigned char *udp_payload, int udp_payload_len)
+{
+	struct quic_buffer *qbuf = &qcontext->quic_buf;
+	unsigned char *quic_decrypted_payload;
+	int ret, quic_decrypted_payload_len;
+	quic_dpt_t *dpt = quic_deprotection_new();
+
+	if(quic_deprotection(dpt, (const u_char *)udp_payload, udp_payload_len) < 0){
+		goto err_exit;
+	}
+
+	if(qbuf->datalen > 0){ //some fragment exist
+		quic_chlo_chunk_assemble(qbuf, dpt->payload.data, dpt->payload.len);
+		quic_decrypted_payload = qbuf->buffer;
+		quic_decrypted_payload_len = qbuf->datalen;
+	}else{
+		quic_decrypted_payload = dpt->payload.data;
+		quic_decrypted_payload_len = dpt->payload.len;
+	}
+
+	ret = quic_chlo_is_complete((enum QUIC_VERSION_T)qcontext->quic_info.quic_version, quic_decrypted_payload, quic_decrypted_payload_len);
+	if(0 == ret){
+		if(NULL == qbuf->buffer || 0 == qbuf->datalen){
+			quic_chlo_chunk_assemble(qbuf, dpt->payload.data, dpt->payload.len);
+		}
+		goto fun_exit;
+	}else{
+		qbuf->is_completed = 1;
+	}
+	parse_quic_decrypted_payload(&qcontext->quic_info, quic_decrypted_payload, quic_decrypted_payload_len);
+
+fun_exit:	
+	quic_deprotection_free(dpt);
+	return PARSE_RESULT_VERSION;
+
+err_exit:
+	quic_deprotection_free(dpt);
+	return PARSE_RESULT_VERSION;
+}
+
+enum PARSE_RESULT parse_quic_all_version(const struct quic_param *g_quic_plugin_env, struct quic_context *qcontext, const char *payload, int payload_len)
+{
+	struct quic_info *quic_info = &qcontext->quic_info;
+	int payload_offset = 0;
+	enum QUIC_VERSION_T quic_version = QUIC_VERSION_UNKNOWN;
+
+	if (payload == NULL || payload_len <= 0)
+	{
+		return PARSE_RESULT_UNKNOWN;
+	}
+	quic_version = is_quic_protocol(payload, payload_len, &payload_offset);
+	if (quic_version == QUIC_VERSION_UNKNOWN)
+	{
+		if(QUIC_IS_LONG_HEADER(payload[0]) == 0){
+			return PARSE_RESULT_PAYLOAD;
+		}
+		return PARSE_RESULT_UNKNOWN;
+	}
+
+	if (quic_version >= GQUIC_VERSION_Q001 && quic_version <= GQUIC_VERSION_Q048)
+	{
+		if (payload_len > payload_offset)
+		{
+			return (enum PARSE_RESULT)parse_quic_uncryption_payload(quic_info, (const unsigned char *)payload + payload_offset, payload_len - payload_offset);
+		}
+		return PARSE_RESULT_VERSION;
+	}
+	else if (((quic_version >= MVFST_VERSION_00 && quic_version <= MVFST_VERSION_0F) ||
+			  (quic_version >= GQUIC_VERSION_Q049 && quic_version <= GQUIC_VERSION_Q059) ||
+			  (quic_version >= GQUIC_VERSION_T050 && quic_version <= GQUIC_VERSION_T059) ||
+			  (quic_version >= GQUIC_VERSION_T050 && quic_version <= GQUIC_VERSION_T059) ||
+			  (quic_version >= IQUIC_VERSION_I022 && quic_version <= IQUIC_VERSION_I029) ||
+			  (quic_version == IQUIC_VERSION_RFC9000)) &&
+			 g_quic_plugin_env->decrypted_switch > 0)
+	{
+		return quic_decrypting_payload(qcontext, (unsigned char *)payload, payload_len);
+	}
+	else
+	{
+		return PARSE_RESULT_VERSION;
+	}
+
+	return PARSE_RESULT_VERSION;
+}
+
+static void quic_info_clear(struct quic_info *qinfo)
+{
+	if(qinfo->sni.iov_base){
+		free(qinfo->sni.iov_base);
+		qinfo->sni.iov_base = NULL;
+		qinfo->sni.iov_len = 0;
+	}
+	if(qinfo->user_agent.iov_base){
+		free(qinfo->user_agent.iov_base);
+		qinfo->user_agent.iov_base = NULL;
+		qinfo->user_agent.iov_len = 0;
+	}
+	if(qinfo->payload.iov_base){
+		free(qinfo->payload.iov_base);
+		qinfo->payload.iov_base = NULL;
+		qinfo->payload.iov_len = 0;
+	}
+}
+
+static void quic_buffer_clear(struct quic_buffer *qbuf)
+{
+	if(qbuf->buffer != NULL && qbuf->is_completed == 1){
+		free(qbuf->buffer);
+		qbuf->buffer = NULL;
+		qbuf->datalen = 0;
+		qbuf->max_size = 0;
+		qbuf->is_completed = 0;
+	}
+}
+
+void quic_analyze_entry(struct session *sess, const struct quic_param *quic_plugin_env, struct quic_context *qcontext, int thread_seq, const char *payload, size_t payload_len)
+{
+	struct quic_message *qmsg;
+	enum PARSE_RESULT res;
+
+	quic_info_clear(&qcontext->quic_info);
+	quic_buffer_clear(&qcontext->quic_buf);
+
+	res = parse_quic_all_version(quic_plugin_env, qcontext, payload, payload_len);
+	if (res == PARSE_RESULT_UNKNOWN){
+		stellar_session_plugin_dettach_current_session(sess);
+		return;
+	}
+
+	if(res == PARSE_RESULT_PAYLOAD){
+		qmsg = quic_create_message(QUIC_PROTECTED_PAYLOAD, qcontext);
+		quic_session_mq_publish_message_safe(sess, quic_plugin_env->quic_topic_id, qmsg);
+		return;
+	}
+
+	if(qcontext->quic_info.sni.iov_base || qcontext->quic_info.user_agent.iov_base){
+		qmsg = quic_create_message(QUIC_CLIENT_HELLO, qcontext);
+		quic_session_mq_publish_message_safe(sess, quic_plugin_env->quic_topic_id, qmsg);
+	}
+	return;
+}
+
+void quic_session_mq_publish_message_safe(struct session *sess, int topic_id, void *msg)
+{
+	int ret = session_mq_publish_message(sess, topic_id, msg);
+	if(ret < 0){
+		FREE(msg);
+	}
+	return;
+}
+struct quic_message *quic_create_message(enum quic_message_type mtype, struct quic_context *context)
+{
+	struct quic_message *msg = (struct quic_message *)CALLOC(1, sizeof(struct quic_message));
+	msg->magic = QUIC_MSG_HDR_MAGIC;
+	msg->type = mtype;
+	msg->qctx = context;
+	return msg;
+}
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+enum quic_message_type quic_message_type_get(const struct quic_message *msg)
+{
+	assert(QUIC_MSG_HDR_MAGIC == msg->magic);
+	if(QUIC_MSG_HDR_MAGIC != msg->magic){
+		return QUIC_MSG_MAX;
+	}
+	return msg->type;
+}
+
+unsigned int quic_message_version_get(const struct quic_message *msg)
+{
+	assert(QUIC_MSG_HDR_MAGIC == msg->magic);
+	return msg->qctx->quic_info.quic_version;
+}
+
+const char *quic_message_readable_version_get0(const struct quic_message *msg)
+{
+	assert(QUIC_MSG_HDR_MAGIC == msg->magic);
+	quic_version_int2string(msg->qctx->quic_info.quic_version, msg->qctx->quic_info.quic_version_str, QUIC_VERSION_STRING_MAX_SIZE);
+	return msg->qctx->quic_info.quic_version_str;
+}
+
+const char *quic_message_readable_ja3hash_get0(const struct quic_message *msg)
+{
+	//todo
+	return NULL;
+}
+
+void quic_message_sni_get0(const struct quic_message *msg, char **result, size_t *len)
+{
+	assert(QUIC_MSG_HDR_MAGIC == msg->magic);
+	if(result){
+		*result = (char *)msg->qctx->quic_info.sni.iov_base;
+	}
+	if(len){
+		*len = msg->qctx->quic_info.sni.iov_len;
+	}
+}
+void quic_message_user_agent_get0(const struct quic_message *msg, char **result, size_t *len)
+{
+	assert(QUIC_MSG_HDR_MAGIC == msg->magic);
+	if(result){
+		*result = (char *)msg->qctx->quic_info.user_agent.iov_base;
+	}
+	if(len){
+		*len = msg->qctx->quic_info.user_agent.iov_len;
+	}
+}
+
+void quic_message_protected_payload_get0(const struct quic_message *msg, char **result, size_t *len)
+{
+	assert(QUIC_MSG_HDR_MAGIC == msg->magic);
+	if(result){
+		*result = (char *)msg->qctx->quic_info.payload.iov_base;
+	}
+	if(len){
+		*len = msg->qctx->quic_info.payload.iov_len;
+	}
+
+}
+
+#ifdef __cplusplus
+}
+#endif