PPB_TCPSocket_Private/PPB_UDPSocket_Private are exposed to Browser

ppapi/shared_impl/tcp_socket_impl.cc

+// Copyright (c) 2011 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 "ppapi/shared_impl/tcp_socket_impl.h"
+
+#include <string.h>
+
+#include <algorithm>
+
+#include "base/basictypes.h"
+#include "base/logging.h"
+#include "ppapi/c/pp_errors.h"
+
+namespace ppapi {
+
+const int32_t TCPSocketImpl::kMaxReadSize = 1024 * 1024;
+const int32_t TCPSocketImpl::kMaxWriteSize = 1024 * 1024;
+
+TCPSocketImpl::TCPSocketImpl(PP_Instance instance, uint32 socket_id)
+    : Resource(instance) {
+  Init(socket_id);
+}
+
+TCPSocketImpl::TCPSocketImpl(const HostResource& resource, uint32 socket_id)
+    : Resource(resource) {
+  Init(socket_id);
+}
+
+TCPSocketImpl::~TCPSocketImpl() {
+}
+
+thunk::PPB_TCPSocket_Private_API*
+TCPSocketImpl::AsPPB_TCPSocket_Private_API() {
+  return this;
+}
+
+int32_t TCPSocketImpl::Connect(const char* host,
+                               uint16_t port,
+                               PP_CompletionCallback callback) {
+  if (!host)
+    return PP_ERROR_BADARGUMENT;
+  if (!callback.func)
+    return PP_ERROR_BLOCKS_MAIN_THREAD;
+  if (connection_state_ != BEFORE_CONNECT)
+    return PP_ERROR_FAILED;
+  if (connect_callback_.func)
+    return PP_ERROR_INPROGRESS;  // Can only have one pending request.
+
+  connect_callback_ = callback;
+  // Send the request, the browser will call us back via ConnectACK.
+  SendConnect(host, port);
+  return PP_OK_COMPLETIONPENDING;
+}
+
+int32_t TCPSocketImpl::ConnectWithNetAddress(
+    const PP_NetAddress_Private* addr,
+    PP_CompletionCallback callback) {
+  if (!addr)
+    return PP_ERROR_BADARGUMENT;
+  if (!callback.func)
+    return PP_ERROR_BLOCKS_MAIN_THREAD;
+  if (connection_state_ != BEFORE_CONNECT)
+    return PP_ERROR_FAILED;
+  if (connect_callback_.func)
+    return PP_ERROR_INPROGRESS;  // Can only have one pending request.
+
+  connect_callback_ = callback;
+  // Send the request, the browser will call us back via ConnectACK.
+  SendConnectWithNetAddress(*addr);
+  return PP_OK_COMPLETIONPENDING;
+}
+
+PP_Bool TCPSocketImpl::GetLocalAddress(PP_NetAddress_Private* local_addr) {
+  if (!IsConnected() || !local_addr)
+    return PP_FALSE;
+
+  *local_addr = local_addr_;
+  return PP_TRUE;
+}
+
+PP_Bool TCPSocketImpl::GetRemoteAddress(PP_NetAddress_Private* remote_addr) {
+  if (!IsConnected() || !remote_addr)
+    return PP_FALSE;
+
+  *remote_addr = remote_addr_;
+  return PP_TRUE;
+}
+
+int32_t TCPSocketImpl::SSLHandshake(const char* server_name,
+                                    uint16_t server_port,
+                                    PP_CompletionCallback callback) {
+  if (!server_name)
+    return PP_ERROR_BADARGUMENT;
+  if (!callback.func)
+    return PP_ERROR_BLOCKS_MAIN_THREAD;
+
+  if (connection_state_ != CONNECTED)
+    return PP_ERROR_FAILED;
+  if (ssl_handshake_callback_.func || read_callback_.func ||
+      write_callback_.func)
+    return PP_ERROR_INPROGRESS;
+
+  ssl_handshake_callback_ = callback;
+
+  // Send the request, the browser will call us back via SSLHandshakeACK.
+  SendSSLHandshake(server_name, server_port);
+  return PP_OK_COMPLETIONPENDING;
+}
+
+int32_t TCPSocketImpl::Read(char* buffer,
+                            int32_t bytes_to_read,
+                            PP_CompletionCallback callback) {
+  if (!buffer || bytes_to_read <= 0)
+    return PP_ERROR_BADARGUMENT;
+  if (!callback.func)
+    return PP_ERROR_BLOCKS_MAIN_THREAD;
+
+  if (!IsConnected())
+    return PP_ERROR_FAILED;
+  if (read_callback_.func || ssl_handshake_callback_.func)
+    return PP_ERROR_INPROGRESS;
+  // TODO(dmichael): use some other strategy for determining if an
+  // operation is in progress
+  read_buffer_ = buffer;
+  bytes_to_read_ = std::min(bytes_to_read, kMaxReadSize);
+  read_callback_ = callback;
+
+  // Send the request, the browser will call us back via ReadACK.
+  SendRead(bytes_to_read_);
+  return PP_OK_COMPLETIONPENDING;
+}
+
+int32_t TCPSocketImpl::Write(const char* buffer,
+                             int32_t bytes_to_write,
+                             PP_CompletionCallback callback) {
+  if (!buffer || bytes_to_write <= 0)
+    return PP_ERROR_BADARGUMENT;
+  if (!callback.func)
+    return PP_ERROR_BLOCKS_MAIN_THREAD;
+
+  if (!IsConnected())
+    return PP_ERROR_FAILED;
+  if (write_callback_.func || ssl_handshake_callback_.func)
+    return PP_ERROR_INPROGRESS;
+
+  if (bytes_to_write > kMaxWriteSize)
+    bytes_to_write = kMaxWriteSize;
+
+  write_callback_ = callback;
+
+  // Send the request, the browser will call us back via WriteACK.
+  SendWrite(std::string(buffer, bytes_to_write));
+  return PP_OK_COMPLETIONPENDING;
+}
+
+void TCPSocketImpl::Disconnect() {
+  if (connection_state_ == DISCONNECTED)
+    return;
+
+  connection_state_ = DISCONNECTED;
+
+  SendDisconnect();
+  socket_id_ = 0;
+
+  PostAbortAndClearIfNecessary(&connect_callback_);
+  PostAbortAndClearIfNecessary(&ssl_handshake_callback_);
+  PostAbortAndClearIfNecessary(&read_callback_);
+  PostAbortAndClearIfNecessary(&write_callback_);
+  read_buffer_ = NULL;
+  bytes_to_read_ = -1;
+}
+
+void TCPSocketImpl::OnConnectCompleted(
+    bool succeeded,
+    const PP_NetAddress_Private& local_addr,
+    const PP_NetAddress_Private& remote_addr) {
+  if (connection_state_ != BEFORE_CONNECT || !connect_callback_.func) {
+    NOTREACHED();
+    return;
+  }
+
+  if (succeeded) {
+    local_addr_ = local_addr;
+    remote_addr_ = remote_addr;
+    connection_state_ = CONNECTED;
+  }
+  PP_RunAndClearCompletionCallback(&connect_callback_,
+                                   succeeded ? PP_OK : PP_ERROR_FAILED);
+}
+
+void TCPSocketImpl::OnSSLHandshakeCompleted(bool succeeded) {
+  if (connection_state_ != CONNECTED || !ssl_handshake_callback_.func) {
+    NOTREACHED();
+    return;
+  }
+
+  if (succeeded) {
+    connection_state_ = SSL_CONNECTED;
+    PP_RunAndClearCompletionCallback(&ssl_handshake_callback_, PP_OK);
+  } else {
+    PP_RunAndClearCompletionCallback(&ssl_handshake_callback_, PP_ERROR_FAILED);
+    Disconnect();
+  }
+}
+
+void TCPSocketImpl::OnReadCompleted(bool succeeded,
+                                    const std::string& data) {
+  if (!read_callback_.func || !read_buffer_) {
+    NOTREACHED();
+    return;
+  }
+
+  if (succeeded) {
+    CHECK_LE(static_cast<int32_t>(data.size()), bytes_to_read_);
+    if (!data.empty())
+      memcpy(read_buffer_, data.c_str(), data.size());
+  }
+  read_buffer_ = NULL;
+  bytes_to_read_ = -1;
+
+  PP_RunAndClearCompletionCallback(
+      &read_callback_,
+      succeeded ? static_cast<int32_t>(data.size()) :
+                  static_cast<int32_t>(PP_ERROR_FAILED));
+}
+
+void TCPSocketImpl::OnWriteCompleted(bool succeeded,
+                                     int32_t bytes_written) {
+  if (!write_callback_.func || (succeeded && bytes_written < 0)) {
+    NOTREACHED();
+    return;
+  }
+
+  PP_RunAndClearCompletionCallback(
+      &write_callback_,
+      succeeded ? bytes_written : static_cast<int32_t>(PP_ERROR_FAILED));
+}
+
+void TCPSocketImpl::Init(uint32 socket_id) {
+  DCHECK(socket_id != 0);
+  socket_id_ = socket_id;
+  connection_state_ = BEFORE_CONNECT;
+  connect_callback_ = PP_BlockUntilComplete();
+  ssl_handshake_callback_ = PP_BlockUntilComplete();
+  read_callback_ = PP_BlockUntilComplete();
+  write_callback_ = PP_BlockUntilComplete();
+  read_buffer_ = NULL;
+  bytes_to_read_ = -1;
+
+  local_addr_.size = 0;
+  memset(local_addr_.data, 0,
+         arraysize(local_addr_.data) * sizeof(*local_addr_.data));
+  remote_addr_.size = 0;
+  memset(remote_addr_.data, 0,
+         arraysize(remote_addr_.data) * sizeof(*remote_addr_.data));
+}
+
+bool TCPSocketImpl::IsConnected() const {
+  return connection_state_ == CONNECTED || connection_state_ == SSL_CONNECTED;
+}
+
+void TCPSocketImpl::PostAbortAndClearIfNecessary(
+    PP_CompletionCallback* callback) {
+  DCHECK(callback);
+
+  if (callback->func) {
+    PostAbort(*callback);
+    *callback = PP_BlockUntilComplete();
+  }
+}
+
+}  // namespace ppapi