Add new InternetAddress class with a static lookup function (including IPv6

runtime/bin/socket_win.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 "platform/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "bin/builtin.h"
 #include "bin/eventhandler.h"
 #include "bin/file.h"
 #include "bin/log.h"
 #include "bin/socket.h"
 
+
+SocketAddress::SocketAddress(struct addrinfo* addrinfo) {
+  ASSERT(INET6_ADDRSTRLEN >= INET_ADDRSTRLEN);
+  RawAddr* raw = reinterpret_cast<RawAddr*>(addrinfo->ai_addr);
+
+  // Clear the port before calling WSAAddressToString as WSAAddressToString
+  // includes the port in the formatted string.
+  DWORD len = INET6_ADDRSTRLEN;
+  int err = WSAAddressToStringA(&raw->addr,
+                                sizeof(RawAddr),
+                                NULL,
+                                as_string_,
+                                &len);
+
+  if (err != 0) {
+    as_string_[0] = 0;
+  }
+  memmove(reinterpret_cast<void *>(&addr_),
+          addrinfo->ai_addr,
+          addrinfo->ai_addrlen);
+}
+
 bool Socket::Initialize() {
   static bool socket_initialized = false;
   if (socket_initialized) return true;
   int err;
   WSADATA winsock_data;
   WORD version_requested = MAKEWORD(2, 2);
   err = WSAStartup(version_requested, &winsock_data);
   if (err == 0) {
     socket_initialized = true;
   } else {
@@ skipping 16 matching lines @@
 
 intptr_t Socket::Write(intptr_t fd, const void* buffer, intptr_t num_bytes) {
   Handle* handle = reinterpret_cast<Handle*>(fd);
   return handle->Write(buffer, num_bytes);
 }
 
 
 intptr_t Socket::GetPort(intptr_t fd) {
   ASSERT(reinterpret_cast<Handle*>(fd)->is_socket());
   SocketHandle* socket_handle = reinterpret_cast<SocketHandle*>(fd);
-  struct sockaddr_in socket_address;
-  socklen_t size = sizeof(socket_address);
+  RawAddr raw;
+  socklen_t size = sizeof(raw);
   if (getsockname(socket_handle->socket(),
-                  reinterpret_cast<struct sockaddr *>(&socket_address),
-                  &size)) {
-    Log::PrintErr("Error getsockname: %s\n", strerror(errno));
+                  &raw.addr,
+                  &size) == SOCKET_ERROR) {
+    Log::PrintErr("Error getsockname: %d\n", WSAGetLastError());
     return 0;
   }
-  return ntohs(socket_address.sin_port);
+  return SocketAddress::GetAddrPort(&raw);
 }
 
 
 bool Socket::GetRemotePeer(intptr_t fd, char *host, intptr_t *port) {
   ASSERT(reinterpret_cast<Handle*>(fd)->is_socket());
   SocketHandle* socket_handle = reinterpret_cast<SocketHandle*>(fd);
-  struct sockaddr_in socket_address;
-  socklen_t size = sizeof(socket_address);
+  RawAddr raw;
+  socklen_t size = sizeof(raw);
   if (getpeername(socket_handle->socket(),
-                  reinterpret_cast<struct sockaddr *>(&socket_address),
+                  &raw.addr,
                   &size)) {
-    Log::PrintErr("Error getpeername: %s\n", strerror(errno));
+    Log::PrintErr("Error getpeername: %d\n", WSAGetLastError());
     return false;
   }
-  *port = ntohs(socket_address.sin_port);
+  *port = SocketAddress::GetAddrPort(&raw);
   // Clear the port before calling WSAAddressToString as WSAAddressToString
   // includes the port in the formatted string.
-  socket_address.sin_port = 0;
-  DWORD len = INET_ADDRSTRLEN;
-  int err = WSAAddressToStringA(reinterpret_cast<LPSOCKADDR>(&socket_address),
-                                sizeof(socket_address),
+  SocketAddress::SetAddrPort(&raw, 0);
+  DWORD len = INET6_ADDRSTRLEN;
+  int err = WSAAddressToStringA(&raw.addr,
+                                sizeof(raw),
                                 NULL,
                                 host,
                                 &len);
   if (err != 0) {
     Log::PrintErr("Error WSAAddressToString: %d\n", WSAGetLastError());
     return false;
   }
   return true;
 }
 
-intptr_t Socket::CreateConnect(const char* host, const intptr_t port) {
-  SOCKET s = socket(AF_INET, SOCK_STREAM, 0);
+intptr_t Socket::CreateConnect(RawAddr addr, const intptr_t port) {
+  SOCKET s = socket(addr.ss_family, SOCK_STREAM, 0);
   if (s == INVALID_SOCKET) {
     return -1;
   }
 
   linger l;
   l.l_onoff = 1;
   l.l_linger = 10;
   int status = setsockopt(s,
                           SOL_SOCKET,
                           SO_LINGER,
                           reinterpret_cast<char*>(&l),
                           sizeof(l));
   if (status != NO_ERROR) {
     FATAL("Failed setting SO_LINGER on socket");
   }
 
-  // Perform a name lookup for an IPv4 address.
-  struct addrinfo hints;
-  memset(&hints, 0, sizeof(hints));
-  hints.ai_family = AF_INET;
-  hints.ai_socktype = SOCK_STREAM;
-  hints.ai_protocol = IPPROTO_TCP;
-  struct addrinfo* result = NULL;
-  status = getaddrinfo(host, 0, &hints, &result);
-  if (status != NO_ERROR) {
-    return -1;
-  }
-
-  // Copy IPv4 address and set the port.
-  struct sockaddr_in server_address;
-  memcpy(&server_address,
-         reinterpret_cast<sockaddr_in *>(result->ai_addr),
-         sizeof(server_address));
-  server_address.sin_port = htons(port);
-  freeaddrinfo(result);  // Free data allocated by getaddrinfo.
+  SocketAddress::SetAddrPort(&addr, port);
   status = connect(
       s,
-      reinterpret_cast<struct sockaddr*>(&server_address),
-      sizeof(server_address));
+      &addr.addr,
+      SocketAddress::GetAddrLength(addr));
   if (status == SOCKET_ERROR) {
     DWORD rc = WSAGetLastError();
     closesocket(s);
     SetLastError(rc);
     return -1;
   }
 
   ClientSocket* client_socket = new ClientSocket(s);
   return reinterpret_cast<intptr_t>(client_socket);
 }
@@ skipping 44 matching lines @@
   ListenSocket* listen_socket = reinterpret_cast<ListenSocket*>(fd);
   ClientSocket* client_socket = listen_socket->Accept();
   if (client_socket != NULL) {
     return reinterpret_cast<intptr_t>(client_socket);
   } else {
     return -1;
   }
 }
 
 
-const char* Socket::LookupIPv4Address(char* host, OSError** os_error) {
-  // Perform a name lookup for an IPv4 address.
+SocketAddresses* Socket::LookupAddress(const char* host,
+                                       int type,
+                                       OSError** os_error) {
   Initialize();
+
+  // Perform a name lookup for a host name.
   struct addrinfo hints;
   memset(&hints, 0, sizeof(hints));
-  hints.ai_family = AF_INET;
+  hints.ai_family = SocketAddress::FromType(type);
   hints.ai_socktype = SOCK_STREAM;
+  hints.ai_flags = 0;
   hints.ai_protocol = IPPROTO_TCP;
   struct addrinfo* info = NULL;
   int status = getaddrinfo(host, 0, &hints, &info);
   if (status != 0) {
     ASSERT(*os_error == NULL);
     DWORD error_code = WSAGetLastError();
     SetLastError(error_code);
     *os_error = new OSError();
     return NULL;
   }
-  // Convert the address into IPv4 dotted decimal notation.
-  char* buffer = reinterpret_cast<char*>(malloc(INET_ADDRSTRLEN));
-  sockaddr_in *sockaddr = reinterpret_cast<sockaddr_in *>(info->ai_addr);
-
-  // Clear the port before calling WSAAddressToString as WSAAddressToString
-  // includes the port in the formatted string.
-  DWORD len = INET_ADDRSTRLEN;
-  int err = WSAAddressToStringA(reinterpret_cast<LPSOCKADDR>(sockaddr),
-                                sizeof(sockaddr_in),
-                                NULL,
-                                buffer,
-                                &len);
-  if (err != 0) {
-    free(buffer);
-    return NULL;
+  intptr_t count = 0;
+  for (struct addrinfo* c = info; c != NULL; c = c->ai_next) {
+    if (c->ai_family == AF_INET || c->ai_family == AF_INET6) count++;
   }
-  return buffer;
+  SocketAddresses* addresses = new SocketAddresses(count);
+  intptr_t i = 0;
+  for (struct addrinfo* c = info; c != NULL; c = c->ai_next) {
+    if (c->ai_family == AF_INET || c->ai_family == AF_INET6) {
+      addresses->SetAt(i, new SocketAddress(c));
+      i++;
+    }
+  }
+  freeaddrinfo(info);
+  return addresses;
 }
 
 
-intptr_t ServerSocket::CreateBindListen(const char* host,
+intptr_t ServerSocket::CreateBindListen(RawAddr addr,
                                         intptr_t port,
                                         intptr_t backlog) {
-  unsigned long socket_addr = inet_addr(host);  // NOLINT
-  if (socket_addr == INADDR_NONE) {
-    return -5;
-  }
-
-  SOCKET s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
+  SOCKET s = socket(addr.ss_family, SOCK_STREAM, IPPROTO_TCP);
   if (s == INVALID_SOCKET) {
     return -1;
   }
 
   BOOL optval = true;
   int status = setsockopt(s,
                           SOL_SOCKET,
                           SO_REUSEADDR,
                           reinterpret_cast<const char*>(&optval),
                           sizeof(optval));
   if (status == SOCKET_ERROR) {
     DWORD rc = WSAGetLastError();
     closesocket(s);
     SetLastError(rc);
     return -1;
   }
 
-  sockaddr_in addr;
-  memset(&addr, 0, sizeof(addr));
-  addr.sin_family = AF_INET;
-  addr.sin_addr.s_addr = socket_addr;
-  addr.sin_port = htons(port);
+  if (addr.ss_family == AF_INET6) {
+    optval = false;
+    setsockopt(s,
+               IPPROTO_IPV6,
+               IPV6_V6ONLY,
+               reinterpret_cast<const char*>(&optval),
+               sizeof(optval));
+  }
+
+  SocketAddress::SetAddrPort(&addr, port);
   status = bind(s,
-                reinterpret_cast<struct sockaddr *>(&addr),
-                sizeof(addr));
+                &addr.addr,
+                SocketAddress::GetAddrLength(addr));
   if (status == SOCKET_ERROR) {
     DWORD rc = WSAGetLastError();
     closesocket(s);
     SetLastError(rc);
     return -1;
   }
 
   status = listen(s, backlog > 0 ? backlog : SOMAXCONN);
   if (status == SOCKET_ERROR) {
     DWORD rc = WSAGetLastError();
@@ skipping 39 matching lines @@
   SocketHandle* handle = reinterpret_cast<SocketHandle*>(fd);
   int on = enabled ? 1 : 0;
   return setsockopt(fd,
                     IPPROTO_TCP,
                     TCP_NODELAY,
                     reinterpret_cast<char *>(&on),
                     sizeof(on)) == 0;
 }
 
 #endif  // defined(TARGET_OS_WINDOWS)