When reading from an SSL socket, attempt to fully fill the caller's buffer

net/socket/ssl_client_socket_openssl.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_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_
 #define NET_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 110 matching lines @@
   int DoPayloadWrite();
 
   int BufferSend();
   int BufferRecv();
   void BufferSendComplete(int result);
   void BufferRecvComplete(int result);
   void TransportWriteComplete(int result);
   void TransportReadComplete(int result);
 
   bool transport_send_busy_;
-  scoped_refptr<DrainableIOBuffer> send_buffer_;
   bool transport_recv_busy_;
   bool transport_recv_eof_;
+
+  scoped_refptr<DrainableIOBuffer> send_buffer_;
   scoped_refptr<IOBuffer> recv_buffer_;
 
   CompletionCallback user_connect_callback_;
   CompletionCallback user_read_callback_;
   CompletionCallback user_write_callback_;
 
   // Used by Read function.
   scoped_refptr<IOBuffer> user_read_buf_;
   int user_read_buf_len_;
 
   // Used by Write function.
   scoped_refptr<IOBuffer> user_write_buf_;
   int user_write_buf_len_;
 
+  // Used by DoPayloadRead() when attempting to fill the caller's buffer with
+  // as much data as possible without blocking.
+  // If DoPayloadRead() encounters an error after having read some data, stores
+  // the result to return on the *next* call to DoPayloadRead().  A value > 0
+  // indicates there is no pending result, otherwise 0 indicates EOF and < 0
+  // indicates an error.
+  int pending_read_error_;
+
   // Set when handshake finishes.
   scoped_refptr<X509Certificate> server_cert_;
   CertVerifyResult server_cert_verify_result_;
   bool completed_handshake_;
 
   // Stores client authentication information between ClientAuthHandler and
   // GetSSLCertRequestInfo calls.
   bool client_auth_cert_needed_;
   // List of DER-encoded X.509 DistinguishedName of certificate authorities
   // allowed by the server.
@@ skipping 26 matching lines @@
   State next_handshake_state_;
   NextProtoStatus npn_status_;
   std::string npn_proto_;
   std::string server_protos_;
   BoundNetLog net_log_;
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SSL_CLIENT_SOCKET_OPENSSL_H_