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@ -1,7 +1,5 @@
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#include <cstring>
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#include <cassert>
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#include <boost/lexical_cast.hpp>
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#include <boost/regex.hpp>
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#include <string>
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#include <atomic>
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#include <memory>
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@ -20,73 +18,59 @@
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#include "I2PEndian.h"
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#include "I2PTunnel.h"
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#include "Config.h"
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#include "HTTP.h"
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namespace i2p
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{
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namespace proxy
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{
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static const size_t http_buffer_size = 8192;
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class HTTPProxyHandler: public i2p::client::I2PServiceHandler, public std::enable_shared_from_this<HTTPProxyHandler>
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namespace i2p {
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namespace proxy {
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bool str_rmatch(std::string & str, const char *suffix) {
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auto pos = str.rfind (suffix);
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if (pos == std::string::npos)
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return false; /* not found */
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if (str.length() == (pos + std::strlen(suffix)))
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return true; /* match */
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return false;
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}
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class HTTPReqHandler: public i2p::client::I2PServiceHandler, public std::enable_shared_from_this<HTTPReqHandler>
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{
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private:
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enum state
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{
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GET_METHOD,
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GET_HOSTNAME,
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GET_HTTPV,
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GET_HTTPVNL, //TODO: fallback to finding HOst: header if needed
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DONE
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};
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void EnterState(state nstate);
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bool HandleData(uint8_t *http_buff, std::size_t len);
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bool HandleRequest(std::size_t len);
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void HandleSockRecv(const boost::system::error_code & ecode, std::size_t bytes_transfered);
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void Terminate();
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void AsyncSockRead();
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void HTTPRequestFailed(const char *message);
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void RedirectToJumpService();
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void ExtractRequest();
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bool IsI2PAddress();
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bool ValidateHTTPRequest();
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void HandleJumpServices();
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bool CreateHTTPRequest(uint8_t *http_buff, std::size_t len);
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void RedirectToJumpService(std::string & host);
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bool ExtractAddressHelper(i2p::http::URL & url, std::string & b64);
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void SanitizeHTTPRequest(i2p::http::HTTPReq & req);
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void SentHTTPFailed(const boost::system::error_code & ecode);
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void HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream);
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uint8_t m_http_buff[http_buffer_size];
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std::shared_ptr<boost::asio::ip::tcp::socket> m_sock;
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std::string m_request; //Data left to be sent
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std::string m_Response;
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std::string m_url; //URL
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std::string m_method; //Method
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std::string m_version; //HTTP version
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std::string m_address; //Address
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std::string m_path; //Path
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int m_port; //Port
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state m_state;//Parsing state
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std::vector<unsigned char> m_recv_buf; /* as "downstream recieve buffer", from client to me */
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std::vector<unsigned char> m_send_buf; /* as "upstream send buffer", from me to remote host */
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public:
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HTTPProxyHandler(HTTPProxyServer * parent, std::shared_ptr<boost::asio::ip::tcp::socket> sock) :
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I2PServiceHandler(parent), m_sock(sock)
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{ EnterState(GET_METHOD); }
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~HTTPProxyHandler() { Terminate(); }
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HTTPReqHandler(HTTPProxy * parent, std::shared_ptr<boost::asio::ip::tcp::socket> sock) :
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I2PServiceHandler(parent), m_sock(sock), m_recv_buf(8192), m_send_buf(0) {};
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~HTTPReqHandler() { Terminate(); }
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void Handle () { AsyncSockRead(); }
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};
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void HTTPProxyHandler::AsyncSockRead()
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void HTTPReqHandler::AsyncSockRead()
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{
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LogPrint(eLogDebug, "HTTPProxy: async sock read");
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if(m_sock) {
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m_sock->async_receive(boost::asio::buffer(m_http_buff, http_buffer_size),
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std::bind(&HTTPProxyHandler::HandleSockRecv, shared_from_this(),
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std::placeholders::_1, std::placeholders::_2));
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} else {
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if (!m_sock) {
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LogPrint(eLogError, "HTTPProxy: no socket for read");
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return;
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}
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m_sock->async_receive(boost::asio::buffer(m_recv_buf),
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std::bind(&HTTPReqHandler::HandleSockRecv, shared_from_this(),
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std::placeholders::_1, std::placeholders::_2));
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}
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void HTTPProxyHandler::Terminate() {
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void HTTPReqHandler::Terminate() {
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if (Kill()) return;
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if (m_sock)
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{
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@ -97,219 +81,131 @@ namespace proxy
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Done(shared_from_this());
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}
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/* All hope is lost beyond this point */
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//TODO: handle this apropriately
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void HTTPProxyHandler::HTTPRequestFailed(const char *message)
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void HTTPReqHandler::HTTPRequestFailed(const char *message)
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{
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std::size_t size = std::strlen(message);
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std::stringstream ss;
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ss << "HTTP/1.0 500 Internal Server Error\r\n"
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<< "Content-Type: text/plain\r\n";
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ss << "Content-Length: " << std::to_string(size + 2) << "\r\n"
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<< "\r\n"; /* end of headers */
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ss << message << "\r\n";
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m_Response = ss.str();
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boost::asio::async_write(*m_sock, boost::asio::buffer(m_Response),
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std::bind(&HTTPProxyHandler::SentHTTPFailed, shared_from_this(), std::placeholders::_1));
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i2p::http::HTTPRes res;
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res.code = 500;
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res.add_header("Content-Type", "text/plain");
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res.add_header("Connection", "close");
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res.body = message;
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res.body += "\r\n";
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std::string response = res.to_string();
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boost::asio::async_write(*m_sock, boost::asio::buffer(response, response.size()),
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std::bind(&HTTPReqHandler::SentHTTPFailed, shared_from_this(), std::placeholders::_1));
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}
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void HTTPProxyHandler::RedirectToJumpService(/*HTTPProxyHandler::errTypes error*/)
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void HTTPReqHandler::RedirectToJumpService(std::string & host)
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{
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std::stringstream response;
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std::string httpAddr; i2p::config::GetOption("http.address", httpAddr);
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uint16_t httpPort; i2p::config::GetOption("http.port", httpPort);
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response << "HTTP/1.1 302 Found\r\nLocation: http://" << httpAddr << ":" << httpPort << "/?page=jumpservices&address=" << m_address << "\r\n\r\n";
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m_Response = response.str ();
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boost::asio::async_write(*m_sock, boost::asio::buffer(m_Response),
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std::bind(&HTTPProxyHandler::SentHTTPFailed, shared_from_this(), std::placeholders::_1));
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}
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i2p::http::HTTPRes res;
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i2p::http::URL url;
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void HTTPProxyHandler::EnterState(HTTPProxyHandler::state nstate)
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{
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m_state = nstate;
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}
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i2p::config::GetOption("http.address", url.host);
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i2p::config::GetOption("http.port", url.port);
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url.schema = "http";
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url.path = "/";
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url.query = "page=jumpservices&address=";
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url.query += host;
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void HTTPProxyHandler::ExtractRequest()
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{
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LogPrint(eLogDebug, "HTTPProxy: request: ", m_method, " ", m_url);
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std::string server="";
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std::string port="80";
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boost::regex rHTTP("http://(.*?)(:(\\d+))?(/.*)");
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boost::smatch m;
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std::string path;
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if(boost::regex_search(m_url, m, rHTTP, boost::match_extra))
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{
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server=m[1].str();
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if (m[2].str() != "") port=m[3].str();
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path=m[4].str();
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}
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LogPrint(eLogDebug, "HTTPProxy: server: ", server, ", port: ", port, ", path: ", path);
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m_address = server;
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m_port = boost::lexical_cast<int>(port);
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m_path = path;
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res.code = 302; /* redirect */
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res.add_header("Location", url.to_string().c_str());
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res.add_header("Connection", "close");
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std::string response = res.to_string();
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boost::asio::async_write(*m_sock, boost::asio::buffer(response, response.length()),
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std::bind(&HTTPReqHandler::SentHTTPFailed, shared_from_this(), std::placeholders::_1));
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}
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bool HTTPProxyHandler::ValidateHTTPRequest()
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bool HTTPReqHandler::ExtractAddressHelper(i2p::http::URL & url, std::string & b64)
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{
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if ( m_version != "HTTP/1.0" && m_version != "HTTP/1.1" )
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{
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LogPrint(eLogError, "HTTPProxy: unsupported version: ", m_version);
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HTTPRequestFailed("unsupported HTTP version");
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const char *param = "i2paddresshelper=";
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std::size_t pos = url.query.find(param);
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std::size_t len = std::strlen(param);
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std::map<std::string, std::string> params;
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if (pos == std::string::npos)
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return false; /* not found */
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if (!url.parse_query(params))
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return false;
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}
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std::string value = params["i2paddresshelper"];
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len += value.length();
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b64 = i2p::http::UrlDecode(value);
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url.query.replace(pos, len, "");
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return true;
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}
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void HTTPProxyHandler::HandleJumpServices()
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void HTTPReqHandler::SanitizeHTTPRequest(i2p::http::HTTPReq & req)
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{
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static const char * helpermark1 = "?i2paddresshelper=";
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static const char * helpermark2 = "&i2paddresshelper=";
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size_t addressHelperPos1 = m_path.rfind (helpermark1);
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size_t addressHelperPos2 = m_path.rfind (helpermark2);
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size_t addressHelperPos;
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if (addressHelperPos1 == std::string::npos)
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{
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if (addressHelperPos2 == std::string::npos)
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return; //Not a jump service
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else
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addressHelperPos = addressHelperPos2;
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}
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else
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{
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if (addressHelperPos2 == std::string::npos)
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addressHelperPos = addressHelperPos1;
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else if ( addressHelperPos1 > addressHelperPos2 )
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addressHelperPos = addressHelperPos1;
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else
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addressHelperPos = addressHelperPos2;
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}
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auto base64 = m_path.substr (addressHelperPos + strlen(helpermark1));
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base64 = i2p::util::http::urlDecode(base64); //Some of the symbols may be urlencoded
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LogPrint (eLogInfo, "HTTPProxy: jump service for ", m_address, ", inserting to address book");
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//TODO: this is very dangerous and broken. We should ask the user before doing anything see http://pastethis.i2p/raw/pn5fL4YNJL7OSWj3Sc6N/
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//TODO: we could redirect the user again to avoid dirtiness in the browser
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i2p::client::context.GetAddressBook ().InsertAddress (m_address, base64);
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m_path.erase(addressHelperPos);
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req.del_header("Referer");
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req.add_header("Connection", "close", true);
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req.add_header("User-Agent", "MYOB/6.66 (AN/ON)", true);
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}
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bool HTTPProxyHandler::IsI2PAddress()
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/**
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* @param len length of data in m_recv_buf
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* @return true on processed request or false if more data needed
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*/
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bool HTTPReqHandler::HandleRequest(std::size_t len)
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{
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auto pos = m_address.rfind (".i2p");
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if (pos != std::string::npos && (pos+4) == m_address.length ())
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{
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return true;
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i2p::http::HTTPReq req;
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i2p::http::URL url;
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std::string b64;
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int req_len = 0;
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req_len = req.parse((const char *) m_recv_buf.data(), len);
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if (req_len == 0)
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return false; /* need more data */
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if (req_len < 0) {
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LogPrint(eLogError, "HTTPProxy: unable to parse request");
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HTTPRequestFailed("invalid request");
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return true; /* parse error */
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}
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return false;
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}
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bool HTTPProxyHandler::CreateHTTPRequest(uint8_t *http_buff, std::size_t len)
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{
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ExtractRequest(); //TODO: parse earlier
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if (!ValidateHTTPRequest()) return false;
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HandleJumpServices();
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/* parsing success, now let's look inside request */
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LogPrint(eLogDebug, "HTTPProxy: requested: ", req.uri);
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url.parse(req.uri);
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i2p::data::IdentHash identHash;
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if (IsI2PAddress ())
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{
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if (!i2p::client::context.GetAddressBook ().GetIdentHash (m_address, identHash)){
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RedirectToJumpService();
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return false;
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}
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if (ExtractAddressHelper(url, b64)) {
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i2p::client::context.GetAddressBook ().InsertAddress (url.host, b64);
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std::string message = "added b64 from addresshelper for " + url.host + " to address book";
|
|
|
|
|
LogPrint (eLogInfo, "HTTPProxy: ", message);
|
|
|
|
|
message += ", please reload page";
|
|
|
|
|
HTTPRequestFailed(message.c_str());
|
|
|
|
|
return true; /* request processed */
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
m_request = m_method;
|
|
|
|
|
m_request.push_back(' ');
|
|
|
|
|
m_request += m_path;
|
|
|
|
|
m_request.push_back(' ');
|
|
|
|
|
m_request += m_version;
|
|
|
|
|
m_request.push_back('\r');
|
|
|
|
|
m_request.push_back('\n');
|
|
|
|
|
m_request.append("Connection: close\r\n");
|
|
|
|
|
// TODO: temporary shortcut. Must be implemented properly
|
|
|
|
|
uint8_t * eol = nullptr;
|
|
|
|
|
bool isEndOfHeader = false;
|
|
|
|
|
while (!isEndOfHeader && len && (eol = (uint8_t *)memchr (http_buff, '\r', len)))
|
|
|
|
|
{
|
|
|
|
|
if (eol)
|
|
|
|
|
{
|
|
|
|
|
*eol = 0; eol++;
|
|
|
|
|
if (strncmp ((const char *)http_buff, "Referer", 7) && strncmp ((const char *)http_buff, "Connection", 10)) // strip out referer and connection
|
|
|
|
|
{
|
|
|
|
|
if (!strncmp ((const char *)http_buff, "User-Agent", 10)) // replace UserAgent
|
|
|
|
|
m_request.append("User-Agent: MYOB/6.66 (AN/ON)");
|
|
|
|
|
else
|
|
|
|
|
m_request.append ((const char *)http_buff);
|
|
|
|
|
m_request.append ("\r\n");
|
|
|
|
|
}
|
|
|
|
|
isEndOfHeader = !http_buff[0];
|
|
|
|
|
auto l = eol - http_buff;
|
|
|
|
|
http_buff = eol;
|
|
|
|
|
len -= l;
|
|
|
|
|
if (len > 0) // \r
|
|
|
|
|
{
|
|
|
|
|
http_buff++;
|
|
|
|
|
len--;
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
m_request.append(reinterpret_cast<const char *>(http_buff),len);
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
bool HTTPProxyHandler::HandleData(uint8_t *http_buff, std::size_t len)
|
|
|
|
|
{
|
|
|
|
|
while (len > 0)
|
|
|
|
|
{
|
|
|
|
|
//TODO: fallback to finding HOst: header if needed
|
|
|
|
|
switch (m_state)
|
|
|
|
|
{
|
|
|
|
|
case GET_METHOD:
|
|
|
|
|
switch (*http_buff)
|
|
|
|
|
{
|
|
|
|
|
case ' ': EnterState(GET_HOSTNAME); break;
|
|
|
|
|
default: m_method.push_back(*http_buff); break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case GET_HOSTNAME:
|
|
|
|
|
switch (*http_buff)
|
|
|
|
|
{
|
|
|
|
|
case ' ': EnterState(GET_HTTPV); break;
|
|
|
|
|
default: m_url.push_back(*http_buff); break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case GET_HTTPV:
|
|
|
|
|
switch (*http_buff)
|
|
|
|
|
{
|
|
|
|
|
case '\r': EnterState(GET_HTTPVNL); break;
|
|
|
|
|
default: m_version.push_back(*http_buff); break;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
case GET_HTTPVNL:
|
|
|
|
|
switch (*http_buff)
|
|
|
|
|
{
|
|
|
|
|
case '\n': EnterState(DONE); break;
|
|
|
|
|
default:
|
|
|
|
|
LogPrint(eLogError, "HTTPProxy: rejected invalid request ending with: ", ((int)*http_buff));
|
|
|
|
|
HTTPRequestFailed("rejected invalid request");
|
|
|
|
|
return false;
|
|
|
|
|
}
|
|
|
|
|
break;
|
|
|
|
|
default:
|
|
|
|
|
LogPrint(eLogError, "HTTPProxy: invalid state: ", m_state);
|
|
|
|
|
HTTPRequestFailed("invalid parser state");
|
|
|
|
|
return false;
|
|
|
|
|
i2p::data::IdentHash identHash;
|
|
|
|
|
if (str_rmatch(url.host, ".i2p")) {
|
|
|
|
|
if (!i2p::client::context.GetAddressBook ().GetIdentHash (url.host, identHash)) {
|
|
|
|
|
RedirectToJumpService(url.host);
|
|
|
|
|
return true; /* request processed */
|
|
|
|
|
}
|
|
|
|
|
http_buff++;
|
|
|
|
|
len--;
|
|
|
|
|
if (m_state == DONE)
|
|
|
|
|
return CreateHTTPRequest(http_buff,len);
|
|
|
|
|
/* TODO: outproxy handler here */
|
|
|
|
|
} else {
|
|
|
|
|
std::string message = "Host " + url.host + " not inside i2p network, but outproxy support still missing";
|
|
|
|
|
HTTPRequestFailed(message.c_str());
|
|
|
|
|
LogPrint (eLogWarning, "HTTPProxy: ", message);
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
SanitizeHTTPRequest(req);
|
|
|
|
|
|
|
|
|
|
/* drop original request from input buffer */
|
|
|
|
|
m_recv_buf.erase(m_recv_buf.begin(), m_recv_buf.begin() + req_len);
|
|
|
|
|
|
|
|
|
|
/* build new buffer from modified request and data from original request */
|
|
|
|
|
std::string request = req.to_string();
|
|
|
|
|
m_send_buf.assign(request.begin(), request.end());
|
|
|
|
|
m_send_buf.insert(m_send_buf.end(), m_recv_buf.begin(), m_recv_buf.end());
|
|
|
|
|
|
|
|
|
|
/* connect to destination */
|
|
|
|
|
GetOwner()->CreateStream (std::bind (&HTTPReqHandler::HandleStreamRequestComplete,
|
|
|
|
|
shared_from_this(), std::placeholders::_1), url.host, url.port);
|
|
|
|
|
|
|
|
|
|
return true;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void HTTPProxyHandler::HandleSockRecv(const boost::system::error_code & ecode, std::size_t len)
|
|
|
|
|
void HTTPReqHandler::HandleSockRecv(const boost::system::error_code & ecode, std::size_t len)
|
|
|
|
|
{
|
|
|
|
|
LogPrint(eLogDebug, "HTTPProxy: sock recv: ", len, " bytes");
|
|
|
|
|
if(ecode)
|
|
|
|
|
@ -319,53 +215,42 @@ namespace proxy
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (HandleData(m_http_buff, len))
|
|
|
|
|
{
|
|
|
|
|
if (m_state == DONE)
|
|
|
|
|
{
|
|
|
|
|
LogPrint(eLogDebug, "HTTPProxy: requested: ", m_url);
|
|
|
|
|
GetOwner()->CreateStream (std::bind (&HTTPProxyHandler::HandleStreamRequestComplete,
|
|
|
|
|
shared_from_this(), std::placeholders::_1), m_address, m_port);
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
AsyncSockRead();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
if (HandleRequest(len))
|
|
|
|
|
return; /* request processed */
|
|
|
|
|
AsyncSockRead();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void HTTPProxyHandler::SentHTTPFailed(const boost::system::error_code & ecode)
|
|
|
|
|
void HTTPReqHandler::SentHTTPFailed(const boost::system::error_code & ecode)
|
|
|
|
|
{
|
|
|
|
|
if (ecode)
|
|
|
|
|
LogPrint (eLogError, "HTTPProxy: Closing socket after sending failure because: ", ecode.message ());
|
|
|
|
|
Terminate();
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
void HTTPProxyHandler::HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream)
|
|
|
|
|
void HTTPReqHandler::HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream)
|
|
|
|
|
{
|
|
|
|
|
if (stream)
|
|
|
|
|
{
|
|
|
|
|
if (Kill()) return;
|
|
|
|
|
LogPrint (eLogInfo, "HTTPProxy: New I2PTunnel connection");
|
|
|
|
|
auto connection = std::make_shared<i2p::client::I2PTunnelConnection>(GetOwner(), m_sock, stream);
|
|
|
|
|
GetOwner()->AddHandler (connection);
|
|
|
|
|
connection->I2PConnect (reinterpret_cast<const uint8_t*>(m_request.data()), m_request.size());
|
|
|
|
|
Done(shared_from_this());
|
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
if (!stream) {
|
|
|
|
|
LogPrint (eLogError, "HTTPProxy: error when creating the stream, check the previous warnings for more info");
|
|
|
|
|
HTTPRequestFailed("error when creating the stream, check logs");
|
|
|
|
|
return;
|
|
|
|
|
}
|
|
|
|
|
if (Kill())
|
|
|
|
|
return;
|
|
|
|
|
LogPrint (eLogDebug, "HTTPProxy: New I2PTunnel connection");
|
|
|
|
|
auto connection = std::make_shared<i2p::client::I2PTunnelConnection>(GetOwner(), m_sock, stream);
|
|
|
|
|
GetOwner()->AddHandler (connection);
|
|
|
|
|
connection->I2PConnect (m_send_buf.data(), m_send_buf.size());
|
|
|
|
|
Done (shared_from_this());
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
HTTPProxyServer::HTTPProxyServer(const std::string& address, int port, std::shared_ptr<i2p::client::ClientDestination> localDestination):
|
|
|
|
|
HTTPProxy::HTTPProxy(const std::string& address, int port, std::shared_ptr<i2p::client::ClientDestination> localDestination):
|
|
|
|
|
TCPIPAcceptor(address, port, localDestination ? localDestination : i2p::client::context.GetSharedLocalDestination ())
|
|
|
|
|
{
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
std::shared_ptr<i2p::client::I2PServiceHandler> HTTPProxyServer::CreateHandler(std::shared_ptr<boost::asio::ip::tcp::socket> socket)
|
|
|
|
|
std::shared_ptr<i2p::client::I2PServiceHandler> HTTPProxy::CreateHandler(std::shared_ptr<boost::asio::ip::tcp::socket> socket)
|
|
|
|
|
{
|
|
|
|
|
return std::make_shared<HTTPProxyHandler> (this, socket);
|
|
|
|
|
return std::make_shared<HTTPReqHandler> (this, socket);
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
}
|
|
|
|
|
} // http
|
|
|
|
|
} // i2p
|
|
|
|
|
|
Jeff Becker
8 years ago