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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4; fill-column: 100 -*- */
/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*/
#include <config.h>
#include "NetUtil.hpp"
#include <common/Util.hpp>
#include "Socket.hpp"
#if ENABLE_SSL && !MOBILEAPP
#include "SslSocket.hpp"
#endif
#include <Poco/Exception.h>
#include <Poco/Net/DNS.h>
#include <Poco/Net/NetworkInterface.h>
#include <netdb.h>
#include <Poco/Net/SocketAddress.h>
namespace net
{
#if !MOBILEAPP
std::string resolveHostAddress(const std::string& targetHost)
{
try
{
return Poco::Net::DNS::resolveOne(targetHost).toString();
}
catch (const Poco::Exception& exc)
{
LOG_WRN("Poco::Net::DNS::resolveOne(\"" << targetHost
<< "\") failed: " << exc.displayText());
try
{
return Poco::Net::IPAddress(targetHost).toString();
}
catch (const Poco::Exception& exc1)
{
LOG_WRN("Poco::Net::IPAddress(\"" << targetHost
<< "\") failed: " << exc1.displayText());
}
}
return targetHost;
}
bool isLocalhost(const std::string& targetHost)
{
const std::string targetAddress = resolveHostAddress(targetHost);
const Poco::Net::NetworkInterface::NetworkInterfaceList list =
Poco::Net::NetworkInterface::list(true, true);
for (const auto& netif : list)
{
std::string address = netif.address().toString();
address = address.substr(0, address.find('%', 0));
if (address == targetAddress)
{
LOG_TRC("Host [" << targetHost << "] is on the same host as the client: \""
<< targetAddress << "\".");
return true;
}
}
LOG_TRC("Host [" << targetHost << "] is not on the same host as the client: \"" << targetAddress
<< "\".");
return false;
}
#endif //!MOBILEAPP
std::shared_ptr<StreamSocket>
connect(const std::string& host, const std::string& port, const bool isSSL,
const std::shared_ptr<ProtocolHandlerInterface>& protocolHandler)
{
std::shared_ptr<StreamSocket> socket;
if (host.empty() || port.empty())
{
LOG_ERR("Invalid host/port " << host << ':' << port);
return socket;
}
LOG_DBG("Connecting to " << host << ':' << port << " (" << (isSSL ? "SSL)" : "Unencrypted)"));
#if !ENABLE_SSL
if (isSSL)
{
LOG_ERR("Error: isSSL socket requested but SSL is not compiled in.");
return socket;
}
#endif
// FIXME: store the address?
struct addrinfo* ainfo = nullptr;
struct addrinfo hints;
std::memset(&hints, 0, sizeof(hints));
const int rc = getaddrinfo(host.c_str(), port.c_str(), &hints, &ainfo);
if (!rc && ainfo)
{
for (struct addrinfo* ai = ainfo; ai; ai = ai->ai_next)
{
std::string canonicalName;
if (ai->ai_canonname)
canonicalName = ai->ai_canonname;
if (ai->ai_addrlen && ai->ai_addr)
{
int fd = ::socket(ai->ai_addr->sa_family, SOCK_STREAM | SOCK_NONBLOCK, 0);
if (fd < 0)
{
LOG_SYS("Failed to create socket");
continue;
}
int res = ::connect(fd, ai->ai_addr, ai->ai_addrlen);
if (fd < 0 || (res < 0 && errno != EINPROGRESS))
{
LOG_SYS("Failed to connect to " << host);
::close(fd);
}
else
{
#if ENABLE_SSL
if (isSSL)
socket = StreamSocket::create<SslStreamSocket>(host, fd, true, protocolHandler);
#endif
if (!socket && !isSSL)
socket = StreamSocket::create<StreamSocket>(host, fd, true, protocolHandler);
if (socket)
break;
LOG_ERR("Failed to allocate socket for client websocket " << host);
::close(fd);
break;
}
}
}
freeaddrinfo(ainfo);
}
else
LOG_SYS("Failed to lookup host [" << host << "]. Skipping");
return socket;
}
std::shared_ptr<StreamSocket>
connect(std::string uri, const std::shared_ptr<ProtocolHandlerInterface>& protocolHandler)
{
std::string scheme;
std::string host;
std::string port;
if (!parseUri(std::move(uri), scheme, host, port))
{
return nullptr;
}
scheme = Util::toLower(std::move(scheme));
const bool isSsl = scheme == "https://" || scheme == "wss://";
return connect(host, port, isSsl, protocolHandler);
}
bool parseUri(std::string uri, std::string& scheme, std::string& host, std::string& port,
std::string& url)
{
const auto itScheme = uri.find("://");
if (itScheme != uri.npos)
{
scheme = uri.substr(0, itScheme + 3); // Include the last slash.
uri = uri.substr(scheme.size()); // Remove the scheme.
}
else
{
// No scheme.
scheme.clear();
}
const auto itUrl = uri.find('/');
if (itUrl != uri.npos)
{
url = uri.substr(itUrl); // Including the first foreslash.
uri = uri.substr(0, itUrl);
}
else
{
url.clear();
}
const auto itPort = uri.find(':');
if (itPort != uri.npos)
{
host = uri.substr(0, itPort);
port = uri.substr(itPort + 1); // Skip the colon.
}
else
{
// No port, just hostname.
host = uri;
port.clear();
}
return !host.empty();
}
} // namespace net
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