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/*
* 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 "rtc_base/net_helpers.h"
#include <memory>
#include <string>
#include "absl/strings/string_view.h"
#if defined(WEBRTC_WIN)
#include <ws2spi.h>
#include <ws2tcpip.h>
#include "rtc_base/win/windows_version.h"
#endif
#if defined(WEBRTC_POSIX) && !defined(__native_client__)
#include <arpa/inet.h>
#if defined(WEBRTC_ANDROID)
#include "rtc_base/ifaddrs_android.h"
#else
#include <ifaddrs.h>
#endif
#endif // defined(WEBRTC_POSIX) && !defined(__native_client__)
namespace rtc {
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, absl::string_view src, void* dst) {
std::string src_str(src);
#if defined(WEBRTC_WIN)
return win32_inet_pton(af, src_str.c_str(), dst);
#else
return ::inet_pton(af, src_str.c_str(), dst);
#endif
}
bool HasIPv4Enabled() {
#if defined(WEBRTC_POSIX) && !defined(__native_client__)
bool has_ipv4 = false;
struct ifaddrs* ifa;
if (getifaddrs(&ifa) < 0) {
return false;
}
for (struct ifaddrs* cur = ifa; cur != nullptr; cur = cur->ifa_next) {
if (cur->ifa_addr != nullptr && cur->ifa_addr->sa_family == AF_INET) {
has_ipv4 = true;
break;
}
}
freeifaddrs(ifa);
return has_ipv4;
#else
return true;
#endif
}
bool HasIPv6Enabled() {
#if defined(WINUWP)
// WinUWP always has IPv6 capability.
return true;
#elif defined(WEBRTC_WIN)
if (rtc::rtc_win::GetVersion() >= rtc::rtc_win::Version::VERSION_VISTA) {
return true;
}
if (rtc::rtc_win::GetVersion() < rtc::rtc_win::Version::VERSION_XP) {
return false;
}
DWORD protbuff_size = 4096;
std::unique_ptr<char[]> protocols;
LPWSAPROTOCOL_INFOW protocol_infos = nullptr;
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;
#elif defined(WEBRTC_POSIX) && !defined(__native_client__)
bool has_ipv6 = false;
struct ifaddrs* ifa;
if (getifaddrs(&ifa) < 0) {
return false;
}
for (struct ifaddrs* cur = ifa; cur != nullptr; cur = cur->ifa_next) {
if (cur->ifa_addr != nullptr && cur->ifa_addr->sa_family == AF_INET6) {
has_ipv6 = true;
break;
}
}
freeifaddrs(ifa);
return has_ipv6;
#else
return true;
#endif
}
} // namespace rtc
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