Implement chrome.socket.bind/listen/accept for TCP server socket.

chrome/browser/extensions/api/socket/socket_api.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 "chrome/browser/extensions/api/socket/socket_api.h"
 
 #include "base/bind.h"
 #include "chrome/common/extensions/permissions/socket_permission.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/extensions/api/dns/host_resolver_wrapper.h"
@@ skipping 257 matching lines @@
       error_ = kPermissionError;
       SetResult(Value::CreateIntegerValue(result));
       return;
     }
   }
 
   result = socket->Bind(address_, port_);
   SetResult(Value::CreateIntegerValue(result));
 }
 
+SocketListenFunction::SocketListenFunction()
+    : params_(NULL) {
+}
+
+SocketListenFunction::~SocketListenFunction() {}
+
+bool SocketListenFunction::Prepare() {
+  params_ = api::experimental_socket::Listen::Params::Create(*args_);
+  EXTENSION_FUNCTION_VALIDATE(params_.get());
+  return true;
+}
+
+void SocketListenFunction::Work() {
+  int result = -1;
+  net::IPEndPoint bindAddress;
+
+  Socket* socket = GetSocket(params_->socket_id);
+  if (socket && socket->GetBindAddress(&bindAddress)) {

[Peng, 2012/09/14 16:27:16]

The permissions for bind and listen are udp-bind:ip:port and tcp-listen:ip:port.
But your implementation need call both bind(ip, port) and listen() for TCP
server socket. I think it may confuse users.  So I think we need change
interface or permissions.

+    std::string address;
+    int port;
+    Socket::IPEndPointToStringAndPort(bindAddress, &address, &port);
+    SocketPermission::CheckParam param(
+        SocketPermissionData::TCP_LISTEN, address, port);
+    if (!GetExtension()->CheckAPIPermissionWithParam(APIPermission::kSocket,
+          &param)) {
+      error_ = kPermissionError;
+      SetResult(Value::CreateIntegerValue(result));
+      return;
+    }
+
+    result = socket->Listen(params_->backlog, &error_);
+  } else {
+    error_ = kSocketNotFoundError;
+  }
+
+  SetResult(Value::CreateIntegerValue(result));
+}
+
+SocketAcceptFunction::SocketAcceptFunction()
+  : params_(NULL) {
+}
+
+SocketAcceptFunction::~SocketAcceptFunction() {}
+
+bool SocketAcceptFunction::Prepare() {
+  params_ = api::experimental_socket::Accept::Params::Create(*args_);
+  EXTENSION_FUNCTION_VALIDATE(params_.get());
+  return true;
+}
+
+void SocketAcceptFunction::AsyncWorkStart() {
+  Socket* socket = GetSocket(params_->socket_id);
+  if (socket) {
+    socket->Accept(base::Bind(&SocketAcceptFunction::OnAccept, this));
+  } else {
+    error_ = kSocketNotFoundError;
+    OnAccept(-1, NULL);
+  }
+}
+
+void SocketAcceptFunction::OnAccept(int result_code,
+                                    net::TCPClientSocket *socket) {
+  DCHECK(socket);
+  // TODO(justinlin): This socket won't have an event notifier, but it's not
+  // used for anything right now.
+  Socket *client_socket = new TCPSocket(socket, extension_id(), NULL, true);
+
+  DictionaryValue* result = new DictionaryValue();
+  result->SetInteger(kResultCodeKey, result_code);
+  result->SetInteger(kSocketIdKey, manager_->Add(client_socket));
+  SetResult(result);
+
+  AsyncWorkCompleted();
+}
+
 SocketReadFunction::SocketReadFunction()
     : params_(NULL) {
 }
 
 SocketReadFunction::~SocketReadFunction() {}
 
 bool SocketReadFunction::Prepare() {
   params_ = api::socket::Read::Params::Create(*args_);
   EXTENSION_FUNCTION_VALIDATE(params_.get());
   return true;
@@ skipping 324 matching lines @@
     info->name = i->name;
     info->address = net::IPAddressToString(i->address);
     create_arg.push_back(info);
   }
 
   results_ = api::socket::GetNetworkList::Results::Create(create_arg);
   SendResponse(true);
 }
 
 }  // namespace extensions