Properly handle alerts from the peer in SSL_read.

net/ssl/openssl_ssl_util.h

 // Copyright 2014 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_SSL_OPENSSL_SSL_UTIL_H_
 #define NET_SSL_OPENSSL_SSL_UTIL_H_
 
 #include "net/base/net_log.h"
 
 namespace crypto {
@@ skipping 33 matching lines @@
   OpenSSLErrorInfo() : error_code(0), file(NULL), line(0) {}
 
   uint32_t error_code;
   const char* file;
   int line;
 };
 
 // Converts an OpenSSL error code into a net error code, walking the OpenSSL
 // error stack if needed. If a value on the stack is used, the error code and
 // associated information are returned in |*out_error_info|. Otherwise its
-// fields are set to 0 and NULL.
+// fields are set to 0 and NULL. This function will never return OK, so
+// SSL_ERROR_ZERO_RETURN must be handled externally.

[davidben, 2015/03/11 21:47:18]

This is important because I don't want this function to accidentally cause
something to report net::OK.

 //
 // Note that |tracer| is not currently used in the implementation, but is passed
 // in anyway as this ensures the caller will clear any residual codes left on
 // the error stack.
 int MapOpenSSLErrorWithDetails(int err,
                                const crypto::OpenSSLErrStackTracer& tracer,
                                OpenSSLErrorInfo* out_error_info);
 
 // Creates NetLog callback for an OpenSSL error.
 NetLog::ParametersCallback CreateNetLogOpenSSLErrorCallback(
     int net_error,
     int ssl_error,
     const OpenSSLErrorInfo& error_info);
 
 }  // namespace net
 
 #endif  // NET_SSL_OPENSSL_SSL_UTIL_H_