URLRequest fuzzer.

net/socket/fuzzed_socket_factory.cc

Index: net/socket/fuzzed_socket_factory.cc
diff --git a/net/socket/fuzzed_socket_factory.cc b/net/socket/fuzzed_socket_factory.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b522d175e688b0d359ffa839e0186dcb7abcb9cb
--- /dev/null
+++ b/net/socket/fuzzed_socket_factory.cc
@@ -0,0 +1,236 @@
+// Copyright 2016 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/socket/fuzzed_socket_factory.h"
+
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "net/base/address_list.h"
+#include "net/base/ip_endpoint.h"
+#include "net/base/net_errors.h"
+#include "net/base/network_change_notifier.h"
+#include "net/log/net_log.h"
+#include "net/socket/connection_attempts.h"
+#include "net/socket/fuzzed_socket.h"
+#include "net/socket/ssl_client_socket.h"
+#include "net/ssl/ssl_failure_state.h"
+#include "net/udp/datagram_client_socket.h"
+
+namespace net {
+
+namespace {
+
+// Datagram ClientSocket implementation that always failed to connect.
+class FailingUDPClientSocket : public DatagramClientSocket {
+ public:
+  FailingUDPClientSocket() {}

[eroman, 2016/04/22 22:07:11]

This looks boring.

[mmenke, 2016/04/25 15:09:19]

It was, very.

+  ~FailingUDPClientSocket() override {}
+
+  // DatagramClientSocket implementation:
+  int Connect(const IPEndPoint& address) override { return ERR_FAILED; }
+
+  int ConnectUsingNetwork(NetworkChangeNotifier::NetworkHandle network,
+                          const IPEndPoint& address) override {
+    return ERR_FAILED;
+  }
+
+  int ConnectUsingDefaultNetwork(const IPEndPoint& address) override {
+    return ERR_FAILED;
+  }
+
+  NetworkChangeNotifier::NetworkHandle GetBoundNetwork() const override {
+    return -1;
+  }
+
+  // DatagramSocket implementation:
+  void Close() override {}
+
+  int GetPeerAddress(IPEndPoint* address) const override {
+    return ERR_SOCKET_NOT_CONNECTED;
+  }
+
+  int GetLocalAddress(IPEndPoint* address) const override {
+    return ERR_SOCKET_NOT_CONNECTED;
+  }
+
+  const BoundNetLog& NetLog() const override { return net_log_; }
+
+  // Socket implementation:
+  int Read(IOBuffer* buf,
+           int buf_len,
+           const CompletionCallback& callback) override {
+    NOTREACHED();
+    return ERR_UNEXPECTED;
+  }
+
+  int Write(IOBuffer* buf,
+            int buf_len,
+            const CompletionCallback& callback) override {
+    NOTREACHED();
+    return ERR_UNEXPECTED;
+  }
+
+  int SetReceiveBufferSize(int32_t size) override {
+    NOTREACHED();
+    return ERR_UNEXPECTED;
+  }
+
+  int SetSendBufferSize(int32_t size) override {
+    NOTREACHED();
+    return ERR_UNEXPECTED;
+  }
+
+  BoundNetLog net_log_;
+
+  DISALLOW_COPY_AND_ASSIGN(FailingUDPClientSocket);
+};
+
+// SSLClientSocket implementation that always fails to connect.
+class FailingSSLClientSocket : public SSLClientSocket {

[eroman, 2016/04/22 22:07:11]

Also bored.

+ public:
+  FailingSSLClientSocket() {}
+  ~FailingSSLClientSocket() override {}
+
+  // Socket implementation:
+  int Read(IOBuffer* buf,
+           int buf_len,
+           const CompletionCallback& callback) override {
+    NOTREACHED();
+    return ERR_UNEXPECTED;
+  }
+
+  int Write(IOBuffer* buf,
+            int buf_len,
+            const CompletionCallback& callback) override {
+    NOTREACHED();
+    return ERR_UNEXPECTED;
+  }
+
+  int SetReceiveBufferSize(int32_t size) override { return OK; }
+  int SetSendBufferSize(int32_t size) override { return OK; }
+
+  // StreamSocket implementation:
+  int Connect(const CompletionCallback& callback) override {
+    return ERR_FAILED;
+  }
+
+  void Disconnect() override {}
+  bool IsConnected() const override { return false; }
+  bool IsConnectedAndIdle() const override { return false; }
+
+  int GetPeerAddress(IPEndPoint* address) const override {
+    return ERR_SOCKET_NOT_CONNECTED;
+  }
+  int GetLocalAddress(IPEndPoint* address) const override {
+    return ERR_SOCKET_NOT_CONNECTED;
+  }
+
+  const BoundNetLog& NetLog() const override { return net_log_; }
+
+  void SetSubresourceSpeculation() override {}
+  void SetOmniboxSpeculation() override {}
+
+  bool WasEverUsed() const override { return false; }
+
+  void EnableTCPFastOpenIfSupported() override {}
+
+  bool WasNpnNegotiated() const override { return false; }
+
+  NextProto GetNegotiatedProtocol() const override { return kProtoUnknown; }
+
+  bool GetSSLInfo(SSLInfo* ssl_info) override { return false; }
+
+  void GetConnectionAttempts(ConnectionAttempts* out) const override {
+    out->clear();
+  }
+
+  void ClearConnectionAttempts() override {}
+
+  void AddConnectionAttempts(const ConnectionAttempts& attempts) override {}
+
+  int64_t GetTotalReceivedBytes() const override { return 0; }
+
+  // SSLSocket implementation:
+  int ExportKeyingMaterial(const base::StringPiece& label,
+                           bool has_context,
+                           const base::StringPiece& context,
+                           unsigned char* out,
+                           unsigned int outlen) override {
+    NOTREACHED();
+    return 0;
+  }
+
+  // SSLClientSocket implementation:
+  void GetSSLCertRequestInfo(SSLCertRequestInfo* cert_request_info) override {}
+
+  NextProtoStatus GetNextProto(std::string* proto) const override {
+    return NextProtoStatus::kNextProtoUnsupported;
+  }
+
+  ChannelIDService* GetChannelIDService() const override {
+    NOTREACHED();
+    return nullptr;
+  }
+
+  Error GetSignedEKMForTokenBinding(crypto::ECPrivateKey* key,
+                                    std::vector<uint8_t>* out) override {
+    NOTREACHED();
+    return ERR_UNEXPECTED;
+  }
+
+  crypto::ECPrivateKey* GetChannelIDKey() const override {
+    NOTREACHED();
+    return nullptr;
+  }
+
+  SSLFailureState GetSSLFailureState() const override {
+    return SSL_FAILURE_UNKNOWN;
+  }
+
+ private:
+  BoundNetLog net_log_;
+
+  DISALLOW_COPY_AND_ASSIGN(FailingSSLClientSocket);
+};
+
+}  // namespace
+
+FuzzedSocketFactory::FuzzedSocketFactory(FuzzedDataProvider* data_provider)
+    : data_provider_(data_provider) {}
+
+FuzzedSocketFactory::~FuzzedSocketFactory() {}
+
+std::unique_ptr<DatagramClientSocket>
+FuzzedSocketFactory::CreateDatagramClientSocket(
+    DatagramSocket::BindType bind_type,
+    const RandIntCallback& rand_int_cb,
+    NetLog* net_log,
+    const NetLog::Source& source) {
+  return make_scoped_ptr(new FailingUDPClientSocket());

[eroman, 2016/04/22 22:07:11]

The new hotness is WrapUnique().

The documentation doesn't explicitly say make_scoped_ptr is unique, but should
probably use the new thing.

and who knows, maybe by 2020 we will be able to use std::make_unique<>...

[mmenke, 2016/04/27 19:53:25]

Done.

+}
+
+std::unique_ptr<StreamSocket> FuzzedSocketFactory::CreateTransportClientSocket(
+    const AddressList& addresses,
+    std::unique_ptr<SocketPerformanceWatcher> socket_performance_watcher,
+    NetLog* net_log,
+    const NetLog::Source& source) {
+  std::unique_ptr<FuzzedSocket> socket(
+      new FuzzedSocket(data_provider_, net_log));
+  socket->set_fuzz_connect_result(true);
+  // Just use the first address.
+  socket->set_remote_address(*addresses.begin());
+  return std::move(socket);

[eroman, 2016/04/22 22:07:11]

Remove the std::move().

Should be sufficient to just "return socket" because of RVO (which generally
enables better optimizations).

[mmenke, 2016/04/27 19:53:25]

That doesn't work - their types are different (std::unique_ptr<FuzzedSocket> vs
std::unique_ptr<StreamSocket>).  Fails to build without the move.

+}
+
+std::unique_ptr<SSLClientSocket> FuzzedSocketFactory::CreateSSLClientSocket(
+    std::unique_ptr<ClientSocketHandle> transport_socket,
+    const HostPortPair& host_and_port,
+    const SSLConfig& ssl_config,
+    const SSLClientSocketContext& context) {
+  return make_scoped_ptr(new FailingSSLClientSocket());

[eroman, 2016/04/22 22:07:11]

ditto, WrapUnique()

[mmenke, 2016/04/27 19:53:25]

Done.

+}
+
+void FuzzedSocketFactory::ClearSSLSessionCache() {}
+
+}  // namespace net