Re-land socket refactor with fixes for Windows.

runtime/bin/socket_base.cc

+// Copyright (c) 2017, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#if !defined(DART_IO_DISABLED)
+
+#include "bin/socket_base.h"
+
+#include "bin/dartutils.h"
+#include "bin/io_buffer.h"
+#include "bin/isolate_data.h"
+#include "bin/lockers.h"
+#include "bin/thread.h"
+#include "bin/utils.h"
+
+#include "include/dart_api.h"
+
+#include "platform/globals.h"
+#include "platform/utils.h"
+
+namespace dart {
+namespace bin {
+
+void FUNCTION_NAME(InternetAddress_Parse)(Dart_NativeArguments args) {
+  const char* address =
+      DartUtils::GetStringValue(Dart_GetNativeArgument(args, 0));
+  ASSERT(address != NULL);
+  RawAddr raw;
+  memset(&raw, 0, sizeof(raw));
+  int type = strchr(address, ':') == NULL ? SocketAddress::TYPE_IPV4
+                                          : SocketAddress::TYPE_IPV6;
+  if (type == SocketAddress::TYPE_IPV4) {
+    raw.addr.sa_family = AF_INET;
+  } else {
+    raw.addr.sa_family = AF_INET6;
+  }
+  bool ok = SocketBase::ParseAddress(type, address, &raw);
+  if (!ok) {
+    Dart_SetReturnValue(args, Dart_Null());
+  } else {
+    Dart_SetReturnValue(args, SocketAddress::ToTypedData(raw));
+  }
+}
+
+
+void FUNCTION_NAME(NetworkInterface_ListSupported)(Dart_NativeArguments args) {
+  Dart_SetReturnValue(args,
+                      Dart_NewBoolean(SocketBase::ListInterfacesSupported()));
+}
+
+
+void FUNCTION_NAME(SocketBase_IsBindError)(Dart_NativeArguments args) {
+  intptr_t error_number =
+      DartUtils::GetIntptrValue(Dart_GetNativeArgument(args, 1));
+  bool is_bind_error = SocketBase::IsBindError(error_number);
+  Dart_SetReturnValue(args, is_bind_error ? Dart_True() : Dart_False());
+}
+
+}  // namespace bin
+}  // namespace dart
+
+#endif  // !defined(DART_IO_DISABLED)