QUIC Crypto - return the reasons for reject message. Reject reason

net/quic/crypto/quic_crypto_client_config.cc

 // Copyright 2013 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.
 
 #include "net/quic/crypto/quic_crypto_client_config.h"
 
 #include "base/stl_util.h"
 #include "base/strings/string_util.h"
 #include "net/quic/crypto/cert_compressor.h"
 #include "net/quic/crypto/chacha20_poly1305_encrypter.h"
@@ skipping 569 matching lines @@
       *error_details = "Certificate missing";
       return QUIC_INVALID_CRYPTO_MESSAGE_PARAMETER;
     }
 
     if (!has_proof && has_cert) {
       *error_details = "Proof missing";
       return QUIC_INVALID_CRYPTO_MESSAGE_PARAMETER;
     }
   }
 
+  const QuicTag* reject_reasons;
+  size_t num_reject_reasons;
+  if (rej.GetTaglist(kRREJ, &reject_reasons,
+                     &num_reject_reasons) == QUIC_NO_ERROR) {
+#if defined(DEBUG)
+    for (size_t i = 0; i < num_reject_reasons; ++i) {
+      DVLOG(1) << "Reasons for rejection: " << reject_reasons[i];
+    }
+#endif
+  }
+
   return QUIC_NO_ERROR;
 }
 
 QuicErrorCode QuicCryptoClientConfig::ProcessServerHello(
     const CryptoHandshakeMessage& server_hello,
     QuicConnectionId connection_id,
     const QuicVersionVector& negotiated_versions,
     CachedState* cached,
     QuicCryptoNegotiatedParameters* out_params,
     string* error_details) {
@@ skipping 144 matching lines @@
     return;
   }
 
   // Update canonical version to point at the "most recent" entry.
   canonical_server_map_[suffix_server_id] = server_id;
 
   server_state->InitializeFrom(*canonical_state);
 }
 
 }  // namespace net