Add static getters for common internet addresses

runtime/bin/socket.cc

 // Copyright (c) 2013, 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.
 
 #include "bin/io_buffer.h"
 #include "bin/socket.h"
 #include "bin/dartutils.h"
 #include "bin/thread.h"
 #include "bin/utils.h"
 
@@ skipping 20 matching lines @@
   uint8_t* data = NULL;
   intptr_t len;
   Dart_Handle result = Dart_TypedDataAcquireData(
       obj, &data_type, reinterpret_cast<void**>(&data), &len);
   if (Dart_IsError(result)) return result;
   memmove(reinterpret_cast<void *>(addr), data, len);
   return Dart_Null();
 }
 
 
+void FUNCTION_NAME(InternetAddress_Fixed)(Dart_NativeArguments args) {
+  Dart_EnterScope();
+  Dart_Handle id_obj = Dart_GetNativeArgument(args, 0);
+  ASSERT(!Dart_IsError(id_obj));
+  int64_t id = 0;
+  bool ok = DartUtils::GetInt64Value(id_obj, &id);
+  ASSERT(ok);
+  USE(ok);
+  RawAddr raw;
+  memset(&raw, 0, sizeof(raw));
+  switch (id) {
+    case SocketAddress::ADDRESS_LOOPBACK_IP_V4: {
+      raw.in.sin_family = AF_INET;
+      raw.in.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+      break;
+    }
+    case SocketAddress::ADDRESS_LOOPBACK_IP_V6: {
+      raw.in6.sin6_family = AF_INET6;
+      raw.in6.sin6_addr = in6addr_any;
+      break;
+    }
+    case SocketAddress::ADDRESS_ANY_IP_V4: {
+      raw.in.sin_family = AF_INET;
+      raw.in.sin_addr.s_addr = INADDR_ANY;
+      break;
+    }
+    case SocketAddress::ADDRESS_ANY_IP_V6: {
+      raw.in6.sin6_family = AF_INET6;
+      raw.in6.sin6_addr = in6addr_loopback;
+      break;
+    }
+    default:
+      UNREACHABLE();

[Bill Hesse, 2013/04/30 10:50:22]

Should we do slightly better error handling here, even though you only call this
from known functions, with good args?

[Søren Gjesse, 2013/04/30 11:28:41]

Changed to throw ArgumentError.

+  }
+  int len = SocketAddress::GetAddrLength(raw);
+  Dart_Handle result = Dart_NewTypedData(kUint8, len);
+  if (Dart_IsError(result)) {
+    Dart_Handle error = DartUtils::NewString("Failed to allocate storage.");
+    Dart_ThrowException(error);
+  }
+  Dart_ListSetAsBytes(result, 0, reinterpret_cast<uint8_t *>(&raw), len);
+  Dart_SetReturnValue(args, result);
+  Dart_ExitScope();
+}
+
+
 void FUNCTION_NAME(Socket_CreateConnect)(Dart_NativeArguments args) {
   Dart_EnterScope();
   Dart_Handle socket_obj = Dart_GetNativeArgument(args, 0);
   Dart_Handle host_obj = Dart_GetNativeArgument(args, 1);
   RawAddr addr;
   Dart_Handle result = GetSockAddr(host_obj, &addr);
   int64_t port = 0;
   if (!Dart_IsError(result) &&
       DartUtils::GetInt64Value(Dart_GetNativeArgument(args, 2), &port)) {
     intptr_t socket = Socket::CreateConnect(addr, port);
@@ skipping 478 matching lines @@
   return Dart_SetNativeInstanceField(socket, kSocketIdNativeField, id);
 }
 
 
 Dart_Handle Socket::GetSocketIdNativeField(Dart_Handle socket, intptr_t* id) {
   return Dart_GetNativeInstanceField(socket, kSocketIdNativeField, id);
 }
 
 }  // namespace bin
 }  // namespace dart