Ignore invalid error code in QuicFramer when process GoAway, ConnectionClose,

net/quic/quic_framer.cc

 // 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.
 
 #include "net/quic/quic_framer.h"
 
 #include <stdint.h>
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
@@ skipping 1476 matching lines @@
     return false;
   }
 
   uint32_t error_code;
   if (!reader->ReadUInt32(&error_code)) {
     set_detailed_error("Unable to read rst stream error code.");
     return false;
   }
 
   if (error_code >= QUIC_STREAM_LAST_ERROR) {
-    set_detailed_error("Invalid rst stream error code.");
-    return false;
+    if (FLAGS_quic_ignore_invalid_error_code) {
+      // Ignore invalid stream error code if any.
+      error_code = QUIC_STREAM_LAST_ERROR;
+    } else {
+      set_detailed_error("Invalid rst stream error code.");
+      return false;
+    }
   }
 
   frame->error_code = static_cast<QuicRstStreamErrorCode>(error_code);
   return true;
 }
 
 bool QuicFramer::ProcessConnectionCloseFrame(QuicDataReader* reader,
                                              QuicConnectionCloseFrame* frame) {
   uint32_t error_code;
   if (!reader->ReadUInt32(&error_code)) {
     set_detailed_error("Unable to read connection close error code.");
     return false;
   }
 
   if (error_code >= QUIC_LAST_ERROR) {
-    set_detailed_error("Invalid error code.");
-    return false;
+    if (FLAGS_quic_ignore_invalid_error_code) {
+      // Ignore invalid QUIC error code if any.
+      error_code = QUIC_LAST_ERROR;
+    } else {
+      set_detailed_error("Invalid error code.");
+      return false;
+    }
   }
 
   frame->error_code = static_cast<QuicErrorCode>(error_code);
 
   StringPiece error_details;
   if (!reader->ReadStringPiece16(&error_details)) {
     set_detailed_error("Unable to read connection close error details.");
     return false;
   }
   frame->error_details = error_details.as_string();
 
   return true;
 }
 
 bool QuicFramer::ProcessGoAwayFrame(QuicDataReader* reader,
                                     QuicGoAwayFrame* frame) {
   uint32_t error_code;
   if (!reader->ReadUInt32(&error_code)) {
     set_detailed_error("Unable to read go away error code.");
     return false;
   }
-  frame->error_code = static_cast<QuicErrorCode>(error_code);
 
   if (error_code >= QUIC_LAST_ERROR) {
-    set_detailed_error("Invalid error code.");
-    return false;
+    if (FLAGS_quic_ignore_invalid_error_code) {
+      // Ignore invalid QUIC error code if any.
+      error_code = QUIC_LAST_ERROR;
+    } else {
+      set_detailed_error("Invalid error code.");
+      return false;
+    }
   }
+  frame->error_code = static_cast<QuicErrorCode>(error_code);
 
   uint32_t stream_id;
   if (!reader->ReadUInt32(&stream_id)) {
     set_detailed_error("Unable to read last good stream id.");
     return false;
   }
   frame->last_good_stream_id = static_cast<QuicStreamId>(stream_id);
 
   StringPiece reason_phrase;
   if (!reader->ReadStringPiece16(&reason_phrase)) {
@@ skipping 688 matching lines @@
 
 bool QuicFramer::RaiseError(QuicErrorCode error) {
   DVLOG(1) << "Error: " << QuicUtils::ErrorToString(error)
            << " detail: " << detailed_error_;
   set_error(error);
   visitor_->OnError(this);
   return false;
 }
 
 }  // namespace net