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

runtime/bin/socket_win.cc

Index: runtime/bin/socket_win.cc
diff --git a/runtime/bin/socket_win.cc b/runtime/bin/socket_win.cc
index 54f66390c00e94c0c8d0aa163b3dd625821be38c..ee25b500062ce6a30eb28116a7643fa5841ac7cb 100644
--- a/runtime/bin/socket_win.cc
+++ b/runtime/bin/socket_win.cc
@@ -11,6 +11,40 @@
 #include "bin/log.h"
 #include "bin/socket.h"
 
+#define SOCKADDR_STORAGE_SET_PORT(addr, port) \
+    if (addr.ss_family == AF_INET) { \
+      reinterpret_cast<struct sockaddr_in*>(&addr)->sin_port = htons(port); \
+    } else { \
+      reinterpret_cast<struct sockaddr_in6*>(&addr)->sin6_port = htons(port); \
+    }
+
+#define SOCKADDR_STORAGE_GET_PORT(addr) \
+    addr.ss_family == AF_INET ? \
+    ntohs(reinterpret_cast<struct sockaddr_in*>(&addr)->sin_port) : \
+    ntohs(reinterpret_cast<struct sockaddr_in6*>(&addr)->sin6_port)
+
+SocketAddress::SocketAddress(struct addrinfo* addrinfo) {
+  ASSERT(INET6_ADDRSTRLEN >= INET_ADDRSTRLEN);
+  sockaddr_storage *sockaddr =
+      reinterpret_cast<sockaddr_storage *>(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(reinterpret_cast<LPSOCKADDR>(sockaddr),
+                                sizeof(sockaddr_storage),
+                                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;
@@ -47,34 +81,34 @@ intptr_t Socket::Write(intptr_t fd, const void* buffer, intptr_t 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;
+  struct sockaddr_storage socket_address;
   socklen_t size = sizeof(socket_address);
   if (getsockname(socket_handle->socket(),
                   reinterpret_cast<struct sockaddr *>(&socket_address),
-                  &size)) {
-    Log::PrintErr("Error getsockname: %s\n", strerror(errno));
+                  &size) == SOCKET_ERROR) {
+    Log::PrintErr("Error getsockname: %d\n", WSAGetLastError());
     return 0;
   }
-  return ntohs(socket_address.sin_port);
+  return SOCKADDR_STORAGE_GET_PORT(socket_address);
 }
 
 
 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);
+  struct sockaddr_storage socket_address;
+  socklen_t size = sizeof(sockaddr_storage);
   if (getpeername(socket_handle->socket(),
                   reinterpret_cast<struct sockaddr *>(&socket_address),
                   &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 = SOCKADDR_STORAGE_GET_PORT(socket_address);
   // Clear the port before calling WSAAddressToString as WSAAddressToString
   // includes the port in the formatted string.
-  socket_address.sin_port = 0;
-  DWORD len = INET_ADDRSTRLEN;
+  SOCKADDR_STORAGE_SET_PORT(socket_address, 0);
+  DWORD len = INET6_ADDRSTRLEN;
   int err = WSAAddressToStringA(reinterpret_cast<LPSOCKADDR>(&socket_address),
                                 sizeof(socket_address),
                                 NULL,
@@ -87,8 +121,8 @@ bool Socket::GetRemotePeer(intptr_t fd, char *host, intptr_t *port) {
   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(sockaddr_storage addr, const intptr_t port) {
+  SOCKET s = socket(addr.ss_family, SOCK_STREAM, 0);
   if (s == INVALID_SOCKET) {
     return -1;
   }
@@ -105,29 +139,11 @@ intptr_t Socket::CreateConnect(const char* host, const intptr_t port) {
     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.
+  SOCKADDR_STORAGE_SET_PORT(addr, port);
   status = connect(
       s,
-      reinterpret_cast<struct sockaddr*>(&server_address),
-      sizeof(server_address));
+      reinterpret_cast<struct sockaddr*>(&addr),
+      SocketAddress::GetAddrLength(addr));
   if (status == SOCKET_ERROR) {
     DWORD rc = WSAGetLastError();
     closesocket(s);
@@ -192,13 +208,17 @@ intptr_t ServerSocket::Accept(intptr_t fd) {
 }
 
 
-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);
@@ -209,35 +229,27 @@ const char* Socket::LookupIPv4Address(char* host, OSError** os_error) {
     *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++;
+  }
+  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++;
+    }
   }
-  return buffer;
+  freeaddrinfo(info);
+  return addresses;
 }
 
 
-intptr_t ServerSocket::CreateBindListen(const char* host,
+intptr_t ServerSocket::CreateBindListen(sockaddr_storage 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;
   }
@@ -255,14 +267,19 @@ intptr_t ServerSocket::CreateBindListen(const char* host,
     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));
+  }
+
+  SOCKADDR_STORAGE_SET_PORT(addr, port);
   status = bind(s,
                 reinterpret_cast<struct sockaddr *>(&addr),
-                sizeof(addr));
+                SocketAddress::GetAddrLength(addr));
   if (status == SOCKET_ERROR) {
     DWORD rc = WSAGetLastError();
     closesocket(s);