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add http connect to http proxy (untested)

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This commit is contained in:
Jeff Becker 2017-09-03 09:46:55 -04:00
parent c1dbd3ffd0
commit b2d1962b81
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GPG key ID: F357B3B42F6F9B05
1 changed files with 114 additions and 50 deletions
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164
libi2pd_client/HTTPProxy.cpp
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@ -67,17 +67,19 @@ namespace proxy {
void ForwardToUpstreamProxy();
void HandleUpstreamHTTPProxyConnect(const boost::system::error_code & ec);
void HandleUpstreamSocksProxyConnect(const boost::system::error_code & ec);
void HTTPConnect(const std::string & host, uint16_t port);
void HandleHTTPConnectStreamRequestComplete(std::shared_ptr<i2p::stream::Stream> stream);
void HandleSocksProxySendHandshake(const boost::system::error_code & ec, std::size_t bytes_transfered);
void HandleSocksProxyReply(const boost::system::error_code & ec, std::size_t bytes_transfered);
typedef std::function<void(boost::asio::ip::tcp::endpoint)> ProxyResolvedHandler;
void HandleUpstreamProxyResolved(const boost::system::error_code & ecode, boost::asio::ip::tcp::resolver::iterator itr, ProxyResolvedHandler handler);
void SocksProxySuccess();
void HandoverToUpstreamProxy();
uint8_t m_recv_chunk[8192];
std::string m_recv_buf; // from client
std::string m_send_buf; // to upstream
@ -116,7 +118,7 @@ namespace proxy {
void HTTPReqHandler::Terminate() {
if (Kill()) return;
if (m_sock)
if (m_sock)
{
LogPrint(eLogDebug, "HTTPProxy: close sock");
m_sock->close();
@ -203,11 +205,11 @@ namespace proxy {
req.RemoveHeader("Referer");
req.RemoveHeader("Via");
req.RemoveHeader("From");
req.RemoveHeader("Forwarded");
req.RemoveHeader("Forwarded");
req.RemoveHeader("Accept", "Accept-Encoding"); // Accept*, but Accept-Encoding
/* drop proxy-disclosing headers */
req.RemoveHeader("X-Forwarded");
req.RemoveHeader("Proxy-"); // Proxy-*
req.RemoveHeader("Proxy-"); // Proxy-*
/* replace headers */
req.UpdateHeader("User-Agent", "MYOB/6.66 (AN/ON)");
/* add headers */
@ -239,14 +241,14 @@ namespace proxy {
LogPrint(eLogDebug, "HTTPProxy: requested: ", m_ClientRequest.uri);
m_RequestURL.parse(m_ClientRequest.uri);
if (ExtractAddressHelper(m_RequestURL, b64))
if (ExtractAddressHelper(m_RequestURL, b64))
{
bool addresshelper; i2p::config::GetOption("httpproxy.addresshelper", addresshelper);
if (!addresshelper)
{
LogPrint(eLogWarning, "HTTPProxy: addresshelper disabled");
GenericProxyError("Invalid request", "adddresshelper is not supported");
return true;
return true;
}
i2p::client::context.GetAddressBook ().InsertAddress (m_RequestURL.host, b64);
LogPrint (eLogInfo, "HTTPProxy: added b64 from addresshelper for ", m_RequestURL.host);
@ -257,43 +259,63 @@ namespace proxy {
GenericProxyInfo("Addresshelper found", ss.str().c_str());
return true; /* request processed */
}
SanitizeHTTPRequest(m_ClientRequest);
std::string dest_host = m_RequestURL.host;
uint16_t dest_port = m_RequestURL.port;
/* always set port, even if missing in request */
if (!dest_port)
dest_port = (m_RequestURL.schema == "https") ? 443 : 80;
/* detect dest_host, set proper 'Host' header in upstream request */
if (dest_host != "")
std::string dest_host;
uint16_t dest_port;
bool useConnect = false;
if(m_ClientRequest.method == "CONNECT")
{
/* absolute url, replace 'Host' header */
std::string h = dest_host;
if (dest_port != 0 && dest_port != 80)
h += ":" + std::to_string(dest_port);
m_ClientRequest.UpdateHeader("Host", h);
}
else
{
auto h = m_ClientRequest.GetHeader ("Host");
if (h.length () > 0)
std::string uri(m_ClientRequest.uri);
auto pos = uri.find(":");
if(pos == std::string::npos || pos == uri.size() - 1)
{
/* relative url and 'Host' header provided. transparent proxy mode? */
i2p::http::URL u;
std::string t = "http://" + h;
u.parse(t);
dest_host = u.host;
dest_port = u.port;
}
else
{
/* relative url and missing 'Host' header */
GenericProxyError("Invalid request", "Can't detect destination host from request");
GenericProxyError("Invalid Request", "invalid request uri");
return true;
}
}
else
{
useConnect = true;
dest_port = std::stoi(uri.substr(pos+1));
dest_host = uri.substr(0, pos);
}
}
else
{
SanitizeHTTPRequest(m_ClientRequest);
dest_host = m_RequestURL.host;
dest_port = m_RequestURL.port;
/* always set port, even if missing in request */
if (!dest_port)
dest_port = (m_RequestURL.schema == "https") ? 443 : 80;
/* detect dest_host, set proper 'Host' header in upstream request */
if (dest_host != "")
{
/* absolute url, replace 'Host' header */
std::string h = dest_host;
if (dest_port != 0 && dest_port != 80)
h += ":" + std::to_string(dest_port);
m_ClientRequest.UpdateHeader("Host", h);
}
else
{
auto h = m_ClientRequest.GetHeader ("Host");
if (h.length () > 0)
{
/* relative url and 'Host' header provided. transparent proxy mode? */
i2p::http::URL u;
std::string t = "http://" + h;
u.parse(t);
dest_host = u.host;
dest_port = u.port;
}
else
{
/* relative url and missing 'Host' header */
GenericProxyError("Invalid request", "Can't detect destination host from request");
return true;
}
}
}
/* check dest_host really exists and inside I2P network */
i2p::data::IdentHash identHash;
if (str_rmatch(dest_host, ".i2p")) {
@ -316,6 +338,11 @@ namespace proxy {
}
return true;
}
if(useConnect)
{
HTTPConnect(dest_host, dest_port);
return true;
}
/* make relative url */
m_RequestURL.schema = "";
@ -347,7 +374,7 @@ namespace proxy {
m_ClientRequest.write(m_ClientRequestBuffer);
m_ClientRequestBuffer << m_recv_buf.substr(m_req_len);
// assume http if empty schema
if (m_ProxyURL.schema == "" || m_ProxyURL.schema == "http") {
// handle upstream http proxy
@ -372,7 +399,7 @@ namespace proxy {
void HTTPReqHandler::HandleUpstreamProxyResolved(const boost::system::error_code & ec, boost::asio::ip::tcp::resolver::iterator it, ProxyResolvedHandler handler)
{
if(ec) GenericProxyError("cannot resolve upstream proxy", ec.message().c_str());
else handler(*it);
else handler(*it);
}
void HTTPReqHandler::HandleUpstreamSocksProxyConnect(const boost::system::error_code & ec)
@ -426,7 +453,44 @@ namespace proxy {
connection->Start();
Terminate();
}
void HTTPReqHandler::HTTPConnect(const std::string & host, uint16_t port)
{
std::string hostname(host);
if(str_rmatch(hostname, ".i2p"))
GetOwner()->CreateStream (std::bind (&HTTPReqHandler::HandleHTTPConnectStreamRequestComplete,
shared_from_this(), std::placeholders::_1), host, port);
else
ForwardToUpstreamProxy();
}
void HTTPReqHandler::HandleHTTPConnectStreamRequestComplete(std::shared_ptr<i2p::stream::Stream> stream)
{
if(stream)
{
m_ClientResponse.code = 101;
m_ClientResponse.status = "Switching Protocols";
m_send_buf = m_ClientResponse.to_string();
boost::asio::async_write(*m_sock, boost::asio::buffer(m_send_buf), boost::asio::transfer_all(), [&] (const boost::system::error_code & ec, std::size_t transferred) {
if(ec)
{
LogPrint(eLogError, "HTTPProxy: failed to send reply: ", ec.message());
}
else
{
auto connection = std::make_shared<i2p::client::I2PTunnelConnection>(GetOwner(), m_sock, stream);
GetOwner()->AddHandler(connection);
connection->I2PConnect();
}
Done(shared_from_this());
});
}
else
{
GenericProxyError("CONNECT error", "Failed to Connect");
}
}
void HTTPReqHandler::SocksProxySuccess()
{
if(m_ClientRequest.method == "CONNECT") {
@ -445,7 +509,7 @@ namespace proxy {
});
}
}
void HTTPReqHandler::HandleSocksProxyReply(const boost::system::error_code & ec, std::size_t bytes_transferred)
{
if(!ec)
@ -463,7 +527,7 @@ namespace proxy {
}
else GenericProxyError("No Reply From socks proxy", ec.message().c_str());
}
void HTTPReqHandler::HandleUpstreamHTTPProxyConnect(const boost::system::error_code & ec)
{
if(!ec) {
@ -471,12 +535,12 @@ namespace proxy {
GenericProxyError("cannot connect", "http out proxy not implemented");
} else GenericProxyError("cannot connect to upstream http proxy", ec.message().c_str());
}
/* will be called after some data received from client */
void HTTPReqHandler::HandleSockRecv(const boost::system::error_code & ecode, std::size_t len)
{
LogPrint(eLogDebug, "HTTPProxy: sock recv: ", len, " bytes, recv buf: ", m_recv_buf.length(), ", send buf: ", m_send_buf.length());
if(ecode)
if(ecode)
{
LogPrint(eLogWarning, "HTTPProxy: sock recv got error: ", ecode);
Terminate();
@ -515,10 +579,10 @@ namespace proxy {
}
HTTPProxy::HTTPProxy(const std::string& address, int port, std::shared_ptr<i2p::client::ClientDestination> localDestination):
TCPIPAcceptor(address, port, localDestination ? localDestination : i2p::client::context.GetSharedLocalDestination ())
TCPIPAcceptor(address, port, localDestination ? localDestination : i2p::client::context.GetSharedLocalDestination ())
{
}
std::shared_ptr<i2p::client::I2PServiceHandler> HTTPProxy::CreateHandler(std::shared_ptr<boost::asio::ip::tcp::socket> socket)
{
return std::make_shared<HTTPReqHandler> (this, socket);