src/mojo/services/network/udp_socket_impl.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "mojo/services/network/udp_socket_impl.h"
   6
   7 #include <string.h>
   8
   9 #include <algorithm>
  10 #include <limits>
  11
  12 #include "base/logging.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/stl_util.h"
  15 #include "mojo/services/network/net_adapters.h"
  16 #include "mojo/services/network/net_address_type_converters.h"
  17 #include "net/base/io_buffer.h"
  18 #include "net/base/net_errors.h"
  19
  20 namespace mojo {
  21
  22 namespace {
  23
  24 const int kMaxReadSize = 128 * 1024;
  25 const size_t kMaxWriteSize = 128 * 1024;
  26 const size_t kMaxPendingSendRequestsUpperbound = 128;
  27 const size_t kDefaultMaxPendingSendRequests = 32;
  28
  29 }  // namespace
  30
  31 UDPSocketImpl::PendingSendRequest::PendingSendRequest() {}
  32
  33 UDPSocketImpl::PendingSendRequest::~PendingSendRequest() {}
  34
  35 UDPSocketImpl::UDPSocketImpl()
  36     : socket_(nullptr, net::NetLog::Source()),
  37       bound_(false),
  38       remaining_recv_slots_(0),
  39       max_pending_send_requests_(kDefaultMaxPendingSendRequests) {
  40 }
  41
  42 UDPSocketImpl::~UDPSocketImpl() {
  43   STLDeleteElements(&pending_send_requests_);
  44 }
  45
  46 void UDPSocketImpl::AllowAddressReuse(
  47     const Callback<void(NetworkErrorPtr)>& callback) {
  48   if (bound_) {
  49     callback.Run(MakeNetworkError(net::ERR_FAILED));
  50     return;
  51   }
  52
  53   socket_.AllowAddressReuse();
  54   callback.Run(MakeNetworkError(net::OK));
  55 }
  56
  57 void UDPSocketImpl::Bind(
  58     NetAddressPtr addr,
  59     const Callback<void(NetworkErrorPtr, NetAddressPtr)>& callback) {
  60   if (bound_) {
  61     callback.Run(MakeNetworkError(net::ERR_FAILED), NetAddressPtr());
  62     return;
  63   }
  64
  65   net::IPEndPoint ip_end_point = addr.To<net::IPEndPoint>();
  66   if (ip_end_point.GetFamily() == net::ADDRESS_FAMILY_UNSPECIFIED) {
  67     callback.Run(MakeNetworkError(net::ERR_ADDRESS_INVALID), NetAddressPtr());
  68     return;
  69   }
  70
  71   int net_result = socket_.Listen(ip_end_point);
  72   if (net_result != net::OK) {
  73     callback.Run(MakeNetworkError(net_result), NetAddressPtr());
  74     return;
  75   }
  76
  77   net::IPEndPoint bound_ip_end_point;
  78   NetAddressPtr bound_addr;
  79   net_result = socket_.GetLocalAddress(&bound_ip_end_point);
  80   if (net_result == net::OK)
  81     bound_addr = NetAddress::From(bound_ip_end_point);
  82
  83   bound_ = true;
  84   callback.Run(MakeNetworkError(net::OK), bound_addr.Pass());
  85
  86   if (remaining_recv_slots_ > 0) {
  87     DCHECK(!recvfrom_buffer_.get());
  88     DoRecvFrom();
  89   }
  90 }
  91
  92 void UDPSocketImpl::SetSendBufferSize(
  93     uint32_t size,
  94     const Callback<void(NetworkErrorPtr)>& callback) {
  95   if (!bound_) {
  96     callback.Run(MakeNetworkError(net::ERR_FAILED));
  97     return;
  98   }
  99
 100   if (size > static_cast<uint32_t>(std::numeric_limits<int32_t>::max()))
 101     size = std::numeric_limits<int32_t>::max();
 102
 103   int net_result = socket_.SetSendBufferSize(static_cast<int32_t>(size));
 104   callback.Run(MakeNetworkError(net_result));
 105 }
 106
 107 void UDPSocketImpl::SetReceiveBufferSize(
 108     uint32_t size,
 109     const Callback<void(NetworkErrorPtr)>& callback) {
 110   if (!bound_) {
 111     callback.Run(MakeNetworkError(net::ERR_FAILED));
 112     return;
 113   }
 114
 115   if (size > static_cast<uint32_t>(std::numeric_limits<int32_t>::max()))
 116     size = std::numeric_limits<int32_t>::max();
 117
 118   int net_result = socket_.SetReceiveBufferSize(static_cast<int32_t>(size));
 119   callback.Run(MakeNetworkError(net_result));
 120 }
 121
 122 void UDPSocketImpl::NegotiateMaxPendingSendRequests(
 123     uint32_t requested_size,
 124     const Callback<void(uint32_t)>& callback) {
 125   if (requested_size != 0) {
 126     max_pending_send_requests_ =
 127       std::min(kMaxPendingSendRequestsUpperbound,
 128                static_cast<size_t>(requested_size));
 129   }
 130   callback.Run(static_cast<uint32_t>(max_pending_send_requests_));
 131
 132   if (pending_send_requests_.size() > max_pending_send_requests_) {
 133     std::deque<PendingSendRequest*> discarded_requests(
 134         pending_send_requests_.begin() + max_pending_send_requests_,
 135         pending_send_requests_.end());
 136     pending_send_requests_.resize(max_pending_send_requests_);
 137     for (auto& discarded_request : discarded_requests) {
 138       discarded_request->callback.Run(
 139           MakeNetworkError(net::ERR_INSUFFICIENT_RESOURCES));
 140       delete discarded_request;
 141     }
 142   }
 143 }
 144
 145 void UDPSocketImpl::ReceiveMore(uint32_t datagram_number) {
 146   if (datagram_number == 0)
 147     return;
 148   if (std::numeric_limits<size_t>::max() - remaining_recv_slots_ <
 149           datagram_number) {
 150     return;
 151   }
 152
 153   remaining_recv_slots_ += datagram_number;
 154
 155   if (bound_ && !recvfrom_buffer_.get()) {
 156     DCHECK_EQ(datagram_number, remaining_recv_slots_);
 157     DoRecvFrom();
 158   }
 159 }
 160
 161 void UDPSocketImpl::SendTo(NetAddressPtr dest_addr,
 162                            Array<uint8_t> data,
 163                            const Callback<void(NetworkErrorPtr)>& callback) {
 164   if (!bound_) {
 165     callback.Run(MakeNetworkError(net::ERR_FAILED));
 166     return;
 167   }
 168
 169   if (sendto_buffer_.get()) {
 170     if (pending_send_requests_.size() >= max_pending_send_requests_) {
 171       callback.Run(MakeNetworkError(net::ERR_INSUFFICIENT_RESOURCES));
 172       return;
 173     }
 174
 175     PendingSendRequest* request = new PendingSendRequest;
 176     request->addr = dest_addr.Pass();
 177     request->data = data.Pass();
 178     request->callback = callback;
 179     pending_send_requests_.push_back(request);
 180     return;
 181   }
 182
 183   DCHECK_EQ(0u, pending_send_requests_.size());
 184
 185   DoSendTo(dest_addr.Pass(), data.Pass(), callback);
 186 }
 187
 188 void UDPSocketImpl::DoRecvFrom() {
 189   DCHECK(bound_);
 190   DCHECK(!recvfrom_buffer_.get());
 191   DCHECK_GT(remaining_recv_slots_, 0u);
 192
 193   recvfrom_buffer_ = new net::IOBuffer(kMaxReadSize);
 194
 195   // It is safe to use base::Unretained(this) because |socket_| is owned by this
 196   // object. If this object gets destroyed (and so does |socket_|), the callback
 197   // won't be called.
 198   int net_result = socket_.RecvFrom(
 199       recvfrom_buffer_.get(),
 200       kMaxReadSize,
 201       &recvfrom_address_,
 202       base::Bind(&UDPSocketImpl::OnRecvFromCompleted, base::Unretained(this)));
 203   if (net_result != net::ERR_IO_PENDING)
 204     OnRecvFromCompleted(net_result);
 205 }
 206
 207 void UDPSocketImpl::DoSendTo(NetAddressPtr addr,
 208                              Array<uint8_t> data,
 209                              const Callback<void(NetworkErrorPtr)>& callback) {
 210   DCHECK(bound_);
 211   DCHECK(!sendto_buffer_.get());
 212
 213   net::IPEndPoint ip_end_point = addr.To<net::IPEndPoint>();
 214   if (ip_end_point.GetFamily() == net::ADDRESS_FAMILY_UNSPECIFIED) {
 215     callback.Run(MakeNetworkError(net::ERR_ADDRESS_INVALID));
 216     return;
 217   }
 218
 219   if (data.size() > kMaxWriteSize) {
 220     callback.Run(MakeNetworkError(net::ERR_INVALID_ARGUMENT));
 221     return;
 222   }
 223   sendto_buffer_ = new net::IOBufferWithSize(static_cast<int>(data.size()));
 224   if (data.size() > 0)
 225     memcpy(sendto_buffer_->data(), &data.storage()[0], data.size());
 226
 227   // It is safe to use base::Unretained(this) because |socket_| is owned by this
 228   // object. If this object gets destroyed (and so does |socket_|), the callback
 229   // won't be called.
 230   int net_result = socket_.SendTo(sendto_buffer_.get(), sendto_buffer_->size(),
 231                                   ip_end_point,
 232                                   base::Bind(&UDPSocketImpl::OnSendToCompleted,
 233                                              base::Unretained(this), callback));
 234   if (net_result != net::ERR_IO_PENDING)
 235     OnSendToCompleted(callback, net_result);
 236 }
 237
 238 void UDPSocketImpl::OnRecvFromCompleted(int net_result) {
 239   DCHECK(recvfrom_buffer_.get());
 240
 241   NetAddressPtr net_address;
 242   Array<uint8_t> array;
 243   if (net_result >= 0) {
 244     net_address = NetAddress::From(recvfrom_address_);
 245     std::vector<uint8_t> data(net_result);
 246     if (net_result > 0)
 247       memcpy(&data[0], recvfrom_buffer_->data(), net_result);
 248
 249     array.Swap(&data);
 250   }
 251   recvfrom_buffer_ = nullptr;
 252
 253   client()->OnReceived(MakeNetworkError(net_result), net_address.Pass(),
 254                        array.Pass());
 255
 256   DCHECK_GT(remaining_recv_slots_, 0u);
 257   remaining_recv_slots_--;
 258   if (remaining_recv_slots_ > 0)
 259     DoRecvFrom();
 260 }
 261
 262 void UDPSocketImpl::OnSendToCompleted(
 263     const Callback<void(NetworkErrorPtr)>& callback,
 264     int net_result) {
 265   DCHECK(sendto_buffer_.get());
 266
 267   sendto_buffer_ = nullptr;
 268
 269   callback.Run(MakeNetworkError(net_result));
 270
 271   if (pending_send_requests_.empty())
 272     return;
 273
 274   scoped_ptr<PendingSendRequest> request(pending_send_requests_.front());
 275   pending_send_requests_.pop_front();
 276
 277   DoSendTo(request->addr.Pass(), request->data.Pass(), request->callback);
 278 }
 279
 280 }  // namespace mojo