Implement an event-based simulator for QuicConnection

net/quic/test_tools/quic_test_utils.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/test_tools/quic_test_utils.h"
 
 #include <memory>
 
 #include "base/sha1.h"
 #include "base/stl_util.h"
@@ skipping 99 matching lines @@
 }
 
 uint64_t SimpleRandom::RandUint64() {
   unsigned char hash[base::kSHA1Length];
   base::SHA1HashBytes(reinterpret_cast<unsigned char*>(&seed_), sizeof(seed_),
                       hash);
   memcpy(&seed_, hash, sizeof(seed_));
   return seed_;
 }
 
+void SimpleRandom::RandBytes(void* data, size_t len) {
+  uint8_t* real_data = static_cast<uint8_t*>(data);
+  for (size_t offset = 0; offset < len; offset++) {
+    real_data[offset] = RandUint64() & 0xff;
+  }
+}
+
+void SimpleRandom::Reseed(const void* additional_entropy, size_t len) {
+  const uint8_t* real_entropy = static_cast<const uint8_t*>(additional_entropy);
+  for (size_t offset = 0; offset < len; offset++) {
+    // Note: this is not actually a well-established way to incorporate new
+    // entropy, but good enough for tests.
+    seed_ *= real_entropy[len];
+  }
+}
+
 MockFramerVisitor::MockFramerVisitor() {
   // By default, we want to accept packets.
   ON_CALL(*this, OnProtocolVersionMismatch(_))
       .WillByDefault(testing::Return(false));
 
   // By default, we want to accept packets.
   ON_CALL(*this, OnUnauthenticatedHeader(_))
       .WillByDefault(testing::Return(true));
 
   ON_CALL(*this, OnUnauthenticatedPublicHeader(_))
@@ skipping 782 matching lines @@
   // strike register worries that we've just overflowed a uint32_t time.
   (*server_connection)->AdvanceTime(connection_start_time);
 }
 
 QuicStreamId QuicClientDataStreamId(int i) {
   return kClientDataStreamId1 + 2 * i;
 }
 
 }  // namespace test
 }  // namespace net