位置：Internal/handshake/crypto_setup_client.go

含义：CHLO is a client hello

位置：Internal/handshake/tags.go

样例及含义：

SNI : "10.1.2.1"// TagSNI is the server name indication

VER : "Q512"// TagVER is the QUIC version

CCS : "\x01\xe8\x81`\x92\x92\x1a\xe8~퀆\xa2\x15\x82\x91"//TagCCS are the hashes of the common certificate sets

MSPC: "\xe8\x03\x00\x00"// TagMSPC is max streams per connection

PDMD: "X509"// TagPDMD is the proof demand

ICSL: "\x1e\x00\x00\x00"// TagICSL is the idle connection state lifetime

MIDS: "\xe8\x03\x00\x00"// TagMIDS is max incoming dyanamic streams

CFCW: "\x00\x00\x18\x00"//TagCFCW is the initial session/connection flow control receive window

SFCW: "\x00\x00\x10\x00"// TagSFCW is the initial stream flow control receive window

STK: "\xb1\x9f'\x94n\xe7\b\x0f\xbc\xa6ÚŸ\x80\xf6\xec\xae\u007f#Y\xb4!\xc8\xc9gY\x0f\x02r,\xfc\xa3~3!JI\x8e\xf6m\xc4\xe3<\xec}\x02`\xaa"\\ TagSTK is the source-address token

PAD : (900 bytes)// TagPAD is padding

// TagCHLO is a client hello

TagCHLO Tag = 'C' + 'H'<<8 + 'L'<<16 + 'O'<<24

// TagREJ is a server hello rejection

TagREJ Tag = 'R' + 'E'<<8 + 'J'<<16

// TagSCFG is a server config

TagSCFG Tag = 'S' + 'C'<<8 + 'F'<<16 + 'G'<<24

// TagPAD is padding

TagPAD Tag = 'P' + 'A'<<8 + 'D'<<16

// TagSNI is the server name indication

TagSNI Tag = 'S' + 'N'<<8 + 'I'<<16

// TagVER is the QUIC version

TagVER Tag = 'V' + 'E'<<8 + 'R'<<16

// TagCCS are the hashes of the common certificate sets

TagCCS Tag = 'C' + 'C'<<8 + 'S'<<16

// TagCCRT are the hashes of the cached certificates

TagCCRT Tag = 'C' + 'C'<<8 + 'R'<<16 + 'T'<<24

// TagMSPC is max streams per connection

TagMSPC Tag = 'M' + 'S'<<8 + 'P'<<16 + 'C'<<24

// TagMIDS is max incoming dyanamic streams

TagMIDS Tag = 'M' + 'I'<<8 + 'D'<<16 + 'S'<<24

// TagUAID is the user agent ID

TagUAID Tag = 'U' + 'A'<<8 + 'I'<<16 + 'D'<<24

// TagSVID is the server ID (unofficial tag by us :)

TagSVID Tag = 'S' + 'V'<<8 + 'I'<<16 + 'D'<<24

// TagTCID is truncation of the connection ID

TagTCID Tag = 'T' + 'C'<<8 + 'I'<<16 + 'D'<<24

// TagPDMD is the proof demand

TagPDMD Tag = 'P' + 'D'<<8 + 'M'<<16 + 'D'<<24

// TagSRBF is the socket receive buffer

TagSRBF Tag = 'S' + 'R'<<8 + 'B'<<16 + 'F'<<24

// TagICSL is the idle connection state lifetime

TagICSL Tag = 'I' + 'C'<<8 + 'S'<<16 + 'L'<<24

// TagNONP is the client proof nonce

TagNONP Tag = 'N' + 'O'<<8 + 'N'<<16 + 'P'<<24

// TagSCLS is the silently close timeout

TagSCLS Tag = 'S' + 'C'<<8 + 'L'<<16 + 'S'<<24

// TagCSCT is the signed cert timestamp (RFC6962) of leaf cert

TagCSCT Tag = 'C' + 'S'<<8 + 'C'<<16 + 'T'<<24

// TagCOPT are the connection options

TagCOPT Tag = 'C' + 'O'<<8 + 'P'<<16 + 'T'<<24

// TagCFCW is the initial session/connection flow control receive window

TagCFCW Tag = 'C' + 'F'<<8 + 'C'<<16 + 'W'<<24

// TagSFCW is the initial stream flow control receive window.

TagSFCW Tag = 'S' + 'F'<<8 + 'C'<<16 + 'W'<<24

// TagFHL2 forces head of line blocking.

// Chrome experiment (see https://codereview.chromium.org/2115033002)

// unsupported by quic-go

TagFHL2 Tag = 'F' + 'H'<<8 + 'L'<<16 + '2'<<24

// TagNSTP is the no STOP_WAITING experiment

// currently unsupported by quic-go

TagNSTP Tag = 'N' + 'S'<<8 + 'T'<<16 + 'P'<<24

// TagSTK is the source-address token

TagSTK Tag = 'S' + 'T'<<8 + 'K'<<16

// TagSNO is the server nonce

TagSNO Tag = 'S' + 'N'<<8 + 'O'<<16

// TagPROF is the server proof

TagPROF Tag = 'P' + 'R'<<8 + 'O'<<16 + 'F'<<24

// TagNONC is the client nonce

TagNONC Tag = 'N' + 'O'<<8 + 'N'<<16 + 'C'<<24

// TagXLCT is the expected leaf certificate

TagXLCT Tag = 'X' + 'L'<<8 + 'C'<<16 + 'T'<<24

// TagSCID is the server config ID

TagSCID Tag = 'S' + 'C'<<8 + 'I'<<16 + 'D'<<24

// TagKEXS is the list of key exchange algos

TagKEXS Tag = 'K' + 'E'<<8 + 'X'<<16 + 'S'<<24

// TagAEAD is the list of AEAD algos

TagAEAD Tag = 'A' + 'E'<<8 + 'A'<<16 + 'D'<<24

// TagPUBS is the public value for the KEX

TagPUBS Tag = 'P' + 'U'<<8 + 'B'<<16 + 'S'<<24

// TagOBIT is the client orbit

TagOBIT Tag = 'O' + 'B'<<8 + 'I'<<16 + 'T'<<24

// TagEXPY is the server config expiry

TagEXPY Tag = 'E' + 'X'<<8 + 'P'<<16 + 'Y'<<24

// TagCERT is the CERT data

TagCERT Tag = 0xff545243

// TagSHLO is the server hello

TagSHLO Tag = 'S' + 'H'<<8 + 'L'<<16 + 'O'<<24

// TagPRST is the public reset tag

TagPRST Tag = 'P' + 'R'<<8 + 'S'<<16 + 'T'<<24

// TagRSEQ is the public reset rejected packet number

TagRSEQ Tag = 'R' + 'S'<<8 + 'E'<<16 + 'Q'<<24

// TagRNON is the public reset nonce

TagRNON Tag = 'R' + 'N'<<8 + 'O'<<16 + 'N'<<24