Adds a modified copy of talk/base to webrtc/base. It is the first step in
migrating talk/base to webrtc/base.
BUG=N/A
R=niklas.enbom@webrtc.org
Review URL: https://webrtc-codereview.appspot.com/17479005
git-svn-id: http://webrtc.googlecode.com/svn/trunk@6129 4adac7df-926f-26a2-2b94-8c16560cd09d
diff --git a/webrtc/base/nethelpers.cc b/webrtc/base/nethelpers.cc
new file mode 100644
index 0000000..5d4802d
--- /dev/null
+++ b/webrtc/base/nethelpers.cc
@@ -0,0 +1,150 @@
+/*
+ * Copyright 2008 The WebRTC Project Authors. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "webrtc/base/nethelpers.h"
+
+#if defined(WEBRTC_WIN)
+#include <ws2spi.h>
+#include <ws2tcpip.h>
+#include "webrtc/base/win32.h"
+#endif
+
+#include "webrtc/base/byteorder.h"
+#include "webrtc/base/logging.h"
+#include "webrtc/base/signalthread.h"
+
+namespace rtc {
+
+int ResolveHostname(const std::string& hostname, int family,
+ std::vector<IPAddress>* addresses) {
+#ifdef __native_client__
+ ASSERT(false);
+ LOG(LS_WARNING) << "ResolveHostname() is not implemented for NaCl";
+ return -1;
+#else // __native_client__
+ if (!addresses) {
+ return -1;
+ }
+ addresses->clear();
+ struct addrinfo* result = NULL;
+ struct addrinfo hints = {0};
+ // TODO(djw): For now this is IPv4 only so existing users remain unaffected.
+ hints.ai_family = AF_INET;
+ hints.ai_flags = AI_ADDRCONFIG;
+ int ret = getaddrinfo(hostname.c_str(), NULL, &hints, &result);
+ if (ret != 0) {
+ return ret;
+ }
+ struct addrinfo* cursor = result;
+ for (; cursor; cursor = cursor->ai_next) {
+ if (family == AF_UNSPEC || cursor->ai_family == family) {
+ IPAddress ip;
+ if (IPFromAddrInfo(cursor, &ip)) {
+ addresses->push_back(ip);
+ }
+ }
+ }
+ freeaddrinfo(result);
+ return 0;
+#endif // !__native_client__
+}
+
+// AsyncResolver
+AsyncResolver::AsyncResolver() : error_(-1) {
+}
+
+void AsyncResolver::Start(const SocketAddress& addr) {
+ addr_ = addr;
+ // SignalThred Start will kickoff the resolve process.
+ SignalThread::Start();
+}
+
+bool AsyncResolver::GetResolvedAddress(int family, SocketAddress* addr) const {
+ if (error_ != 0 || addresses_.empty())
+ return false;
+
+ *addr = addr_;
+ for (size_t i = 0; i < addresses_.size(); ++i) {
+ if (family == addresses_[i].family()) {
+ addr->SetResolvedIP(addresses_[i]);
+ return true;
+ }
+ }
+ return false;
+}
+
+void AsyncResolver::DoWork() {
+ error_ = ResolveHostname(addr_.hostname().c_str(), addr_.family(),
+ &addresses_);
+}
+
+void AsyncResolver::OnWorkDone() {
+ SignalDone(this);
+}
+
+const char* inet_ntop(int af, const void *src, char* dst, socklen_t size) {
+#if defined(WEBRTC_WIN)
+ return win32_inet_ntop(af, src, dst, size);
+#else
+ return ::inet_ntop(af, src, dst, size);
+#endif
+}
+
+int inet_pton(int af, const char* src, void *dst) {
+#if defined(WEBRTC_WIN)
+ return win32_inet_pton(af, src, dst);
+#else
+ return ::inet_pton(af, src, dst);
+#endif
+}
+
+bool HasIPv6Enabled() {
+#if !defined(WEBRTC_WIN)
+ // We only need to check this for Windows XP (so far).
+ return true;
+#else
+ if (IsWindowsVistaOrLater()) {
+ return true;
+ }
+ if (!IsWindowsXpOrLater()) {
+ return false;
+ }
+ DWORD protbuff_size = 4096;
+ scoped_ptr<char[]> protocols;
+ LPWSAPROTOCOL_INFOW protocol_infos = NULL;
+ int requested_protocols[2] = {AF_INET6, 0};
+
+ int err = 0;
+ int ret = 0;
+ // Check for protocols in a do-while loop until we provide a buffer large
+ // enough. (WSCEnumProtocols sets protbuff_size to its desired value).
+ // It is extremely unlikely that this will loop more than once.
+ do {
+ protocols.reset(new char[protbuff_size]);
+ protocol_infos = reinterpret_cast<LPWSAPROTOCOL_INFOW>(protocols.get());
+ ret = WSCEnumProtocols(requested_protocols, protocol_infos,
+ &protbuff_size, &err);
+ } while (ret == SOCKET_ERROR && err == WSAENOBUFS);
+
+ if (ret == SOCKET_ERROR) {
+ return false;
+ }
+
+ // Even if ret is positive, check specifically for IPv6.
+ // Non-IPv6 enabled WinXP will still return a RAW protocol.
+ for (int i = 0; i < ret; ++i) {
+ if (protocol_infos[i].iAddressFamily == AF_INET6) {
+ return true;
+ }
+ }
+ return false;
+#endif
+}
+} // namespace rtc