relnote: add connection option "SPSH" to indicate whether client wants to do server push or not, wh…

net/quic/crypto/crypto_protocol.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_QUIC_CRYPTO_CRYPTO_PROTOCOL_H_
 #define NET_QUIC_CRYPTO_CRYPTO_PROTOCOL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 158 matching lines @@
 const QuicTag kCIDK = TAG('C', 'I', 'D', 'K');   // ChannelID key
 const QuicTag kCIDS = TAG('C', 'I', 'D', 'S');   // ChannelID signature
 
 // Public reset tags
 const QuicTag kRNON = TAG('R', 'N', 'O', 'N');   // Public reset nonce proof
 const QuicTag kRSEQ = TAG('R', 'S', 'E', 'Q');   // Rejected packet number
 
 // Universal tags
 const QuicTag kPAD  = TAG('P', 'A', 'D', '\0');  // Padding
 
+// Server push tags
+const QuicTag kSPSH = TAG('S', 'P', 'S', 'H');  // Support server push.
+
 // Sent by clients with the fix to crbug/566156
 const QuicTag kFIXD = TAG('F', 'I', 'X', 'D');   // Client hello
 // clang-format on
 
 // These tags have a special form so that they appear either at the beginning
 // or the end of a handshake message. Since handshake messages are sorted by
 // tag value, the tags with 0 at the end will sort first and those with 255 at
 // the end will sort last.
 //
 // The certificate chain should have a tag that will cause it to be sorted at
@@ skipping 35 matching lines @@
 // amplification factor of any mirror DoS attack.
 //
 // A client may pad an inchoate client hello to a size larger than
 // kClientHelloMinimumSize to make it more likely to receive a complete
 // rejection message.
 const size_t kClientHelloMinimumSize = 1024;
 
 }  // namespace net
 
 #endif  // NET_QUIC_CRYPTO_CRYPTO_PROTOCOL_H_