root/content/browser/renderer_host/p2p/socket_host_test_utils.cc

DEFINITIONS

1. write_pending_
2. AppendInputData
3. SetPeerAddress
4. SetLocalAddress
5. Read
6. Write
7. DoAsyncWrite
8. SetReceiveBufferSize
9. SetSendBufferSize
10. Connect
11. Disconnect
12. IsConnected
13. IsConnectedAndIdle
14. GetPeerAddress
15. GetLocalAddress
16. SetSubresourceSpeculation
17. SetOmniboxSpeculation
18. WasEverUsed
19. UsingTCPFastOpen
20. WasNpnNegotiated
21. GetNegotiatedProtocol
22. GetSSLInfo
23. CreateRandomPacket
24. CreateStunPacket
25. CreateStunRequest
26. CreateStunResponse
27. CreateStunError
28. ParseAddress

// Copyright (c) 2013 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 "content/browser/renderer_host/p2p/socket_host_test_utils.h"

#include "base/sys_byteorder.h"
#include "base/thread_task_runner_handle.h"
#include "net/base/completion_callback.h"
#include "net/base/io_buffer.h"

const int kStunHeaderSize = 20;
const uint16 kStunBindingRequest = 0x0001;
const uint16 kStunBindingResponse = 0x0102;
const uint16 kStunBindingError = 0x0111;
const uint32 kStunMagicCookie = 0x2112A442;

MockIPCSender::MockIPCSender() { }
MockIPCSender::~MockIPCSender() { }

FakeSocket::FakeSocket(std::string* written_data)
    : read_pending_(false),
      input_pos_(0),
      written_data_(written_data),
      async_write_(false),
      write_pending_(false) {
}

FakeSocket::~FakeSocket() { }

void FakeSocket::AppendInputData(const char* data, int data_size) {
  input_data_.insert(input_data_.end(), data, data + data_size);
  // Complete pending read if any.
  if (read_pending_) {
    read_pending_ = false;
    int result = std::min(read_buffer_size_,
                          static_cast<int>(input_data_.size() - input_pos_));
    CHECK(result > 0);
    memcpy(read_buffer_->data(), &input_data_[0] + input_pos_, result);
    input_pos_ += result;
    read_buffer_ = NULL;
    net::CompletionCallback cb = read_callback_;
    read_callback_.Reset();
    cb.Run(result);
  }
}

void FakeSocket::SetPeerAddress(const net::IPEndPoint& peer_address) {
  peer_address_ = peer_address;
}

void FakeSocket::SetLocalAddress(const net::IPEndPoint& local_address) {
  local_address_ = local_address;
}

int FakeSocket::Read(net::IOBuffer* buf, int buf_len,
                     const net::CompletionCallback& callback) {
  DCHECK(buf);
  if (input_pos_ < static_cast<int>(input_data_.size())){
    int result = std::min(buf_len,
                          static_cast<int>(input_data_.size()) - input_pos_);
    memcpy(buf->data(), &(*input_data_.begin()) + input_pos_, result);
    input_pos_ += result;
    return result;
  } else {
    read_pending_ = true;
    read_buffer_ = buf;
    read_buffer_size_ = buf_len;
    read_callback_ = callback;
    return net::ERR_IO_PENDING;
  }
}

int FakeSocket::Write(net::IOBuffer* buf, int buf_len,
                      const net::CompletionCallback& callback) {
  DCHECK(buf);
  DCHECK(!write_pending_);

  if (async_write_) {

    base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE, base::Bind(
        &FakeSocket::DoAsyncWrite, base::Unretained(this),
        scoped_refptr<net::IOBuffer>(buf), buf_len, callback));
    write_pending_ = true;
    return net::ERR_IO_PENDING;
  }

  if (written_data_) {
    written_data_->insert(written_data_->end(),
                          buf->data(), buf->data() + buf_len);
  }
  return buf_len;
}

void FakeSocket::DoAsyncWrite(scoped_refptr<net::IOBuffer> buf, int buf_len,
                              const net::CompletionCallback& callback) {
  write_pending_ = false;

  if (written_data_) {
    written_data_->insert(written_data_->end(),
                          buf->data(), buf->data() + buf_len);
  }
  callback.Run(buf_len);
}

int FakeSocket::SetReceiveBufferSize(int32 size) {
  NOTIMPLEMENTED();
  return net::ERR_NOT_IMPLEMENTED;
}

int FakeSocket::SetSendBufferSize(int32 size) {
  NOTIMPLEMENTED();
  return net::ERR_NOT_IMPLEMENTED;
}

int FakeSocket::Connect(const net::CompletionCallback& callback) {
  return 0;
}

void FakeSocket::Disconnect() {
  NOTREACHED();
}

bool FakeSocket::IsConnected() const {
  return true;
}

bool FakeSocket::IsConnectedAndIdle() const {
  return false;
}

int FakeSocket::GetPeerAddress(net::IPEndPoint* address) const {
  *address = peer_address_;
  return net::OK;
}

int FakeSocket::GetLocalAddress(net::IPEndPoint* address) const {
  *address = local_address_;
  return net::OK;
}

const net::BoundNetLog& FakeSocket::NetLog() const {
  NOTREACHED();
  return net_log_;
}

void FakeSocket::SetSubresourceSpeculation() {
  NOTREACHED();
}

void FakeSocket::SetOmniboxSpeculation() {
  NOTREACHED();
}

bool FakeSocket::WasEverUsed() const {
  return true;
}

bool FakeSocket::UsingTCPFastOpen() const {
  return false;
}

bool FakeSocket::WasNpnNegotiated() const {
  return false;
}

net::NextProto FakeSocket::GetNegotiatedProtocol() const {
  return net::kProtoUnknown;
}

bool FakeSocket::GetSSLInfo(net::SSLInfo* ssl_info) {
  return false;
}

void CreateRandomPacket(std::vector<char>* packet) {
  size_t size = kStunHeaderSize + rand() % 1000;
  packet->resize(size);
  for (size_t i = 0; i < size; i++) {
    (*packet)[i] = rand() % 256;
  }
  // Always set the first bit to ensure that generated packet is not
  // valid STUN packet.
  (*packet)[0] = (*packet)[0] | 0x80;
}

static void CreateStunPacket(std::vector<char>* packet, uint16 type) {
  CreateRandomPacket(packet);
  *reinterpret_cast<uint16*>(&*packet->begin()) = base::HostToNet16(type);
  *reinterpret_cast<uint16*>(&*packet->begin() + 2) =
      base::HostToNet16(packet->size() - kStunHeaderSize);
  *reinterpret_cast<uint32*>(&*packet->begin() + 4) =
      base::HostToNet32(kStunMagicCookie);
}

void CreateStunRequest(std::vector<char>* packet) {
  CreateStunPacket(packet, kStunBindingRequest);
}

void CreateStunResponse(std::vector<char>* packet) {
  CreateStunPacket(packet, kStunBindingResponse);
}

void CreateStunError(std::vector<char>* packet) {
  CreateStunPacket(packet, kStunBindingError);
}

net::IPEndPoint ParseAddress(const std::string ip_str, int port) {
  net::IPAddressNumber ip;
  EXPECT_TRUE(net::ParseIPLiteralToNumber(ip_str, &ip));
  return net::IPEndPoint(ip, port);
}