mirror of
https://github.com/PurpleI2P/i2pd.git
synced 2025-11-04 08:30:46 +00:00
Merge branch 'fix_http_proxy_500'
This commit is contained in:
Jeff Becker
commit
543a372435
6 changed files with 405 additions and 267 deletions
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@ -744,7 +744,6 @@ namespace client
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LogPrint (eLogInfo, "Addressbook: received ", m_Link, " ETag: ", m_Etag, " Last-Modified: ", m_LastModified);
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if (!response.eof () && !response.fail ())
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{
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success = true;
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if (!isChunked)
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success = ProcessResponse (response, isGzip);
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else
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443
HTTPProxy.cpp
443
HTTPProxy.cpp
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@ -1,14 +1,8 @@
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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 <string>
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#include <atomic>
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#include <memory>
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#include <set>
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#include <boost/asio.hpp>
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#include <mutex>
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#include "I2PService.h"
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#include "Destination.h"
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#include "HTTPProxy.h"
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#include "util.h"
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#include "Identity.h"
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@ -20,57 +14,71 @@
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#include "Config.h"
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#include "HTTP.h"
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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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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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{
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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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bool HandleRequest(std::size_t len);
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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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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(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 HTTPRequestFailed(/*std::string 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 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::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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std::string m_request; //Data left to be sent
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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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public:
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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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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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void Handle () { AsyncSockRead(); }
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};
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void HTTPReqHandler::AsyncSockRead()
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void HTTPProxyHandler::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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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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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 HTTPReqHandler::Terminate() {
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void HTTPProxyHandler::Terminate() {
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if (Kill()) return;
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if (m_sock)
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{
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@ -81,175 +89,204 @@ namespace proxy {
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Done(shared_from_this());
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}
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void HTTPReqHandler::HTTPRequestFailed(const char *message)
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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(/*HTTPProxyHandler::errTypes error*/)
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{
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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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static std::string response = "HTTP/1.0 500 Internal Server Error\r\nContent-type: text/html\r\nContent-length: 0\r\n\r\n";
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boost::asio::async_write(*m_sock, boost::asio::buffer(response,response.size()),
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std::bind(&HTTPProxyHandler::SentHTTPFailed, shared_from_this(), std::placeholders::_1));
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}
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void HTTPReqHandler::RedirectToJumpService(std::string & host)
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void HTTPProxyHandler::RedirectToJumpService(/*HTTPProxyHandler::errTypes error*/)
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{
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i2p::http::HTTPRes res;
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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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boost::asio::async_write(*m_sock, boost::asio::buffer(response.str (),response.str ().length ()),
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std::bind(&HTTPProxyHandler::SentHTTPFailed, shared_from_this(), std::placeholders::_1));
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}
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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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void HTTPProxyHandler::ExtractRequest()
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{
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LogPrint(eLogDebug, "HTTPProxy: request: ", m_method, " ", m_url);
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i2p::http::URL url;
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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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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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url.parse (m_url);
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m_address = url.host;
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m_port = url.port;
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m_path = url.path;
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if (url.query.length () > 0) m_path += "?" + url.query;
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if (!m_port) m_port = 80;
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LogPrint(eLogDebug, "HTTPProxy: server: ", m_address, ", port: ", m_port, ", path: ", m_path);
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}
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bool HTTPReqHandler::ExtractAddressHelper(i2p::http::URL & url, std::string & b64)
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bool HTTPProxyHandler::ValidateHTTPRequest()
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{
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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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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(); //TODO: send right stuff
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return false;
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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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}
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return true;
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}
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void HTTPReqHandler::SanitizeHTTPRequest(i2p::http::HTTPReq & req)
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void HTTPProxyHandler::HandleJumpServices()
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{
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req.del_header("Referer");
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req.del_header("Via");
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req.del_header("Forwarded");
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std::vector<std::string> toErase;
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for (auto it : req.headers) {
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if (it.first.compare(0, 12, "X-Forwarded-")) {
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toErase.push_back(it.first);
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} else if (it.first.compare(0, 6, "Proxy-")) {
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toErase.push_back(it.first);
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} else {
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/* allow this header */
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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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for (auto header : toErase) {
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req.headers.erase(header);
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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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/* replace headers */
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req.add_header("Connection", "close", true); /* keep-alive conns not supported yet */
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req.add_header("User-Agent", "MYOB/6.66 (AN/ON)", true); /* privacy */
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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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}
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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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bool HTTPProxyHandler::IsI2PAddress()
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{
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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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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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}
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return false;
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}
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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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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";
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LogPrint (eLogInfo, "HTTPProxy: ", message);
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message += ", please reload page";
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HTTPRequestFailed(message.c_str());
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return true; /* request processed */
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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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i2p::data::IdentHash identHash;
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if (str_rmatch(url.host, ".i2p")) {
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if (!i2p::client::context.GetAddressBook ().GetIdentHash (url.host, identHash)) {
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RedirectToJumpService(url.host);
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return true; /* request processed */
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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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/* TODO: outproxy handler here */
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} else {
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std::string message = "Host " + url.host + " not inside i2p network, but outproxy support still missing";
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HTTPRequestFailed(message.c_str());
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LogPrint (eLogWarning, "HTTPProxy: ", message);
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return true;
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}
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SanitizeHTTPRequest(req);
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std::string dest_host = url.host;
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uint16_t dest_port = url.port;
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/* set proper 'Host' header in upstream request */
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auto h = req.headers.find("Host");
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if (dest_host != "") {
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/* absolute url, replace 'Host' header */
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std::string h = dest_host;
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if (dest_port != 0 && dest_port != 80)
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h += ":" + std::to_string(dest_port);
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req.add_header("Host", h, true);
|
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} else if (h != req.headers.end()) {
|
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/* relative url and 'Host' header provided. transparent proxy mode? */
|
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i2p::http::URL u;
|
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std::string t = "http://" + h->second;
|
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u.parse(t);
|
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dest_host = u.host;
|
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dest_port = u.port;
|
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} else {
|
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/* relative url and missing 'Host' header */
|
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std::string message = "Can't detect destination host from request";
|
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HTTPRequestFailed(message.c_str());
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return true;
|
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}
|
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/* make relative url */
|
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url.schema = "";
|
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url.host = "";
|
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req.uri = url.to_string();
|
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|
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/* drop original request from input buffer */
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m_recv_buf.erase(m_recv_buf.begin(), m_recv_buf.begin() + req_len);
|
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|
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/* build new buffer from modified request and data from original request */
|
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std::string request = req.to_string();
|
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m_send_buf.assign(request.begin(), request.end());
|
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m_send_buf.insert(m_send_buf.end(), m_recv_buf.begin(), m_recv_buf.end());
|
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|
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/* connect to destination */
|
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GetOwner()->CreateStream (std::bind (&HTTPReqHandler::HandleStreamRequestComplete,
|
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shared_from_this(), std::placeholders::_1), dest_host, dest_port);
|
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|
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|
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m_request = m_method;
|
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m_request.push_back(' ');
|
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m_request += m_path;
|
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m_request.push_back(' ');
|
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m_request += m_version;
|
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m_request.push_back('\r');
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m_request.push_back('\n');
|
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m_request.append("Connection: close\r\n");
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// TODO: temporary shortcut. Must be implemented properly
|
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uint8_t * eol = nullptr;
|
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bool isEndOfHeader = false;
|
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while (!isEndOfHeader && len && (eol = (uint8_t *)memchr (http_buff, '\r', len)))
|
||||
{
|
||||
if (eol)
|
||||
{
|
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*eol = 0; eol++;
|
||||
if (strncmp ((const char *)http_buff, "Referer", 7) && strncmp ((const char *)http_buff, "Connection", 10)) // strip out referer and connection
|
||||
{
|
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if (!strncmp ((const char *)http_buff, "User-Agent", 10)) // replace UserAgent
|
||||
m_request.append("User-Agent: MYOB/6.66 (AN/ON)");
|
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else
|
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m_request.append ((const char *)http_buff);
|
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m_request.append ("\r\n");
|
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}
|
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isEndOfHeader = !http_buff[0];
|
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auto l = eol - http_buff;
|
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http_buff = eol;
|
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len -= l;
|
||||
if (len > 0) // \r
|
||||
{
|
||||
http_buff++;
|
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len--;
|
||||
}
|
||||
}
|
||||
}
|
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m_request.append(reinterpret_cast<const char *>(http_buff),len);
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return true;
|
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}
|
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|
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void HTTPReqHandler::HandleSockRecv(const boost::system::error_code & ecode, std::size_t len)
|
||||
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(); //TODO: add correct code
|
||||
return false;
|
||||
}
|
||||
break;
|
||||
default:
|
||||
LogPrint(eLogError, "HTTPProxy: invalid state: ", m_state);
|
||||
HTTPRequestFailed(); //TODO: add correct code 500
|
||||
return false;
|
||||
}
|
||||
http_buff++;
|
||||
len--;
|
||||
if (m_state == DONE)
|
||||
return CreateHTTPRequest(http_buff,len);
|
||||
}
|
||||
return true;
|
||||
}
|
||||
|
||||
void HTTPProxyHandler::HandleSockRecv(const boost::system::error_code & ecode, std::size_t len)
|
||||
{
|
||||
LogPrint(eLogDebug, "HTTPProxy: sock recv: ", len, " bytes");
|
||||
if(ecode)
|
||||
|
|
@ -259,44 +296,54 @@ namespace proxy {
|
|||
return;
|
||||
}
|
||||
|
||||
if (HandleRequest(len)) {
|
||||
m_recv_buf.clear();
|
||||
return; /* request processed */
|
||||
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();
|
||||
}
|
||||
AsyncSockRead();
|
||||
|
||||
}
|
||||
|
||||
void HTTPReqHandler::SentHTTPFailed(const boost::system::error_code & ecode)
|
||||
void HTTPProxyHandler::SentHTTPFailed(const boost::system::error_code & ecode)
|
||||
{
|
||||
if (ecode)
|
||||
LogPrint (eLogError, "HTTPProxy: Closing socket after sending failure because: ", ecode.message ());
|
||||
Terminate();
|
||||
}
|
||||
|
||||
void HTTPReqHandler::HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream)
|
||||
void HTTPProxyHandler::HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream)
|
||||
{
|
||||
if (!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
|
||||
{
|
||||
LogPrint (eLogError, "HTTPProxy: error when creating the stream, check the previous warnings for more info");
|
||||
HTTPRequestFailed("error when creating the stream, check logs");
|
||||
return;
|
||||
HTTPRequestFailed(); // TODO: Send correct error message host unreachable
|
||||
}
|
||||
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());
|
||||
}
|
||||
|
||||
HTTPProxy::HTTPProxy(const std::string& address, int port, std::shared_ptr<i2p::client::ClientDestination> localDestination):
|
||||
HTTPProxyServer::HTTPProxyServer(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> HTTPProxy::CreateHandler(std::shared_ptr<boost::asio::ip::tcp::socket> socket)
|
||||
std::shared_ptr<i2p::client::I2PServiceHandler> HTTPProxyServer::CreateHandler(std::shared_ptr<boost::asio::ip::tcp::socket> socket)
|
||||
{
|
||||
return std::make_shared<HTTPReqHandler> (this, socket);
|
||||
return std::make_shared<HTTPProxyHandler> (this, socket);
|
||||
}
|
||||
} // http
|
||||
} // i2p
|
||||
|
||||
}
|
||||
}
|
||||
|
|
|
|||
25
HTTPProxy.h
25
HTTPProxy.h
|
|
@ -1,21 +1,32 @@
|
|||
#ifndef HTTP_PROXY_H__
|
||||
#define HTTP_PROXY_H__
|
||||
|
||||
namespace i2p {
|
||||
namespace proxy {
|
||||
class HTTPProxy: public i2p::client::TCPIPAcceptor
|
||||
#include <memory>
|
||||
#include <set>
|
||||
#include <boost/asio.hpp>
|
||||
#include <mutex>
|
||||
#include "I2PService.h"
|
||||
#include "Destination.h"
|
||||
|
||||
namespace i2p
|
||||
{
|
||||
namespace proxy
|
||||
{
|
||||
class HTTPProxyServer: public i2p::client::TCPIPAcceptor
|
||||
{
|
||||
public:
|
||||
|
||||
HTTPProxy(const std::string& address, int port, std::shared_ptr<i2p::client::ClientDestination> localDestination = nullptr);
|
||||
~HTTPProxy() {};
|
||||
HTTPProxyServer(const std::string& address, int port, std::shared_ptr<i2p::client::ClientDestination> localDestination = nullptr);
|
||||
~HTTPProxyServer() {};
|
||||
|
||||
protected:
|
||||
// Implements TCPIPAcceptor
|
||||
std::shared_ptr<i2p::client::I2PServiceHandler> CreateHandler(std::shared_ptr<boost::asio::ip::tcp::socket> socket);
|
||||
const char* GetName() { return "HTTP Proxy"; }
|
||||
};
|
||||
} // http
|
||||
} // i2p
|
||||
|
||||
typedef HTTPProxyServer HTTPProxy;
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
|
|
|
|||
184
I2CP.cpp
184
I2CP.cpp
|
|
@ -23,7 +23,7 @@ namespace i2p
|
|||
namespace client
|
||||
{
|
||||
|
||||
I2CPDestination::I2CPDestination (I2CPSession& owner, std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params):
|
||||
I2CPDestination::I2CPDestination (std::shared_ptr<I2CPSession> owner, std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params):
|
||||
LeaseSetDestination (isPublic, ¶ms), m_Owner (owner), m_Identity (identity)
|
||||
{
|
||||
}
|
||||
|
|
@ -37,7 +37,7 @@ namespace client
|
|||
{
|
||||
uint32_t length = bufbe32toh (buf);
|
||||
if (length > len - 4) length = len - 4;
|
||||
m_Owner.SendMessagePayloadMessage (buf + 4, length);
|
||||
m_Owner->SendMessagePayloadMessage (buf + 4, length);
|
||||
}
|
||||
|
||||
void I2CPDestination::CreateNewLeaseSet (std::vector<std::shared_ptr<i2p::tunnel::InboundTunnel> > tunnels)
|
||||
|
|
@ -46,9 +46,9 @@ namespace client
|
|||
m_LeaseSetExpirationTime = ls.GetExpirationTime ();
|
||||
uint8_t * leases = ls.GetLeases ();
|
||||
leases[-1] = tunnels.size ();
|
||||
htobe16buf (leases - 3, m_Owner.GetSessionID ());
|
||||
htobe16buf (leases - 3, m_Owner->GetSessionID ());
|
||||
size_t l = 2/*sessionID*/ + 1/*num leases*/ + i2p::data::LEASE_SIZE*tunnels.size ();
|
||||
m_Owner.SendI2CPMessage (I2CP_REQUEST_VARIABLE_LEASESET_MESSAGE, leases - 3, l);
|
||||
m_Owner->SendI2CPMessage (I2CP_REQUEST_VARIABLE_LEASESET_MESSAGE, leases - 3, l);
|
||||
}
|
||||
|
||||
void I2CPDestination::LeaseSetCreated (const uint8_t * buf, size_t len)
|
||||
|
|
@ -78,10 +78,10 @@ namespace client
|
|||
if (ls)
|
||||
{
|
||||
bool sent = s->SendMsg (msg, ls);
|
||||
s->m_Owner.SendMessageStatusMessage (nonce, sent ? eI2CPMessageStatusGuaranteedSuccess : eI2CPMessageStatusGuaranteedFailure);
|
||||
s->m_Owner->SendMessageStatusMessage (nonce, sent ? eI2CPMessageStatusGuaranteedSuccess : eI2CPMessageStatusGuaranteedFailure);
|
||||
}
|
||||
else
|
||||
s->m_Owner.SendMessageStatusMessage (nonce, eI2CPMessageStatusNoLeaseSet);
|
||||
s->m_Owner->SendMessageStatusMessage (nonce, eI2CPMessageStatusNoLeaseSet);
|
||||
});
|
||||
}
|
||||
}
|
||||
|
|
@ -117,9 +117,8 @@ namespace client
|
|||
I2CPSession::I2CPSession (I2CPServer& owner, std::shared_ptr<boost::asio::ip::tcp::socket> socket):
|
||||
m_Owner (owner), m_Socket (socket),
|
||||
m_NextMessage (nullptr), m_NextMessageLen (0), m_NextMessageOffset (0),
|
||||
m_MessageID (0)
|
||||
m_SessionID (0xFFFF), m_MessageID (0), m_IsSendAccepted (true)
|
||||
{
|
||||
RAND_bytes ((uint8_t *)&m_SessionID, 2);
|
||||
}
|
||||
|
||||
I2CPSession::~I2CPSession ()
|
||||
|
|
@ -134,6 +133,7 @@ namespace client
|
|||
|
||||
void I2CPSession::Stop ()
|
||||
{
|
||||
Terminate ();
|
||||
}
|
||||
|
||||
void I2CPSession::ReadProtocolByte ()
|
||||
|
|
@ -167,24 +167,59 @@ namespace client
|
|||
size_t offset = 0; // from m_Buffer
|
||||
if (m_NextMessage)
|
||||
{
|
||||
if (m_NextMessageOffset + bytes_transferred <= m_NextMessageLen)
|
||||
if (!m_NextMessageLen) // we didn't receive header yet
|
||||
{
|
||||
memcpy (m_NextMessage + m_NextMessageOffset, m_Buffer, bytes_transferred);
|
||||
m_NextMessageOffset += bytes_transferred;
|
||||
offset = bytes_transferred;
|
||||
if (m_NextMessageOffset + bytes_transferred < I2CP_HEADER_SIZE)
|
||||
{
|
||||
// still no complete header
|
||||
memcpy (m_NextMessage + m_NextMessageOffset, m_Buffer, bytes_transferred);
|
||||
m_NextMessageOffset += bytes_transferred;
|
||||
offset = bytes_transferred;
|
||||
}
|
||||
else
|
||||
{
|
||||
// we know message length now
|
||||
offset = I2CP_HEADER_SIZE - m_NextMessageOffset;
|
||||
memcpy (m_NextMessage + m_NextMessageOffset, m_Buffer, offset);
|
||||
m_NextMessageLen = bufbe32toh (m_NextMessage + I2CP_HEADER_LENGTH_OFFSET) + I2CP_HEADER_SIZE;
|
||||
m_NextMessageOffset = I2CP_HEADER_SIZE;
|
||||
}
|
||||
}
|
||||
|
||||
if (offset < bytes_transferred)
|
||||
{
|
||||
auto msgRemainingLen = m_NextMessageLen - m_NextMessageOffset;
|
||||
auto bufRemainingLen = bytes_transferred - offset;
|
||||
if (bufRemainingLen < msgRemainingLen)
|
||||
{
|
||||
memcpy (m_NextMessage + m_NextMessageOffset, m_Buffer + offset, bufRemainingLen);
|
||||
m_NextMessageOffset += bufRemainingLen;
|
||||
offset += bufRemainingLen;
|
||||
}
|
||||
else
|
||||
{
|
||||
// m_NextMessage complete
|
||||
offset += msgRemainingLen;
|
||||
memcpy (m_NextMessage + m_NextMessageOffset, m_Buffer + offset, msgRemainingLen);
|
||||
HandleNextMessage (m_NextMessage);
|
||||
delete[] m_NextMessage;
|
||||
m_NextMessage = nullptr;
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
// m_NextMessage complete
|
||||
offset = m_NextMessageLen - m_NextMessageOffset;
|
||||
memcpy (m_NextMessage + m_NextMessageOffset, m_Buffer, offset);
|
||||
HandleNextMessage (m_NextMessage);
|
||||
delete[] m_NextMessage;
|
||||
m_NextMessage = nullptr;
|
||||
}
|
||||
}
|
||||
// process the rest
|
||||
while (offset < bytes_transferred)
|
||||
{
|
||||
if (bytes_transferred - offset < I2CP_HEADER_SIZE)
|
||||
{
|
||||
// we don't have message header yet
|
||||
m_NextMessage = new uint8_t[0xFFFF]; // allocate 64K
|
||||
m_NextMessageLen = 0; // we must set message length later
|
||||
m_NextMessageOffset = bytes_transferred - offset;
|
||||
memcpy (m_NextMessage, m_Buffer + offset, m_NextMessageOffset); // just copy it
|
||||
break;
|
||||
}
|
||||
|
||||
auto msgLen = bufbe32toh (m_Buffer + offset + I2CP_HEADER_LENGTH_OFFSET) + I2CP_HEADER_SIZE;
|
||||
if (msgLen > 0xFFFF) // 64K
|
||||
{
|
||||
|
|
@ -236,14 +271,20 @@ namespace client
|
|||
|
||||
void I2CPSession::SendI2CPMessage (uint8_t type, const uint8_t * payload, size_t len)
|
||||
{
|
||||
auto l = len + I2CP_HEADER_SIZE;
|
||||
uint8_t * buf = new uint8_t[l];
|
||||
htobe32buf (buf + I2CP_HEADER_LENGTH_OFFSET, len);
|
||||
buf[I2CP_HEADER_TYPE_OFFSET] = type;
|
||||
memcpy (buf + I2CP_HEADER_SIZE, payload, len);
|
||||
boost::asio::async_write (*m_Socket, boost::asio::buffer (buf, l), boost::asio::transfer_all (),
|
||||
std::bind(&I2CPSession::HandleI2CPMessageSent, shared_from_this (),
|
||||
std::placeholders::_1, std::placeholders::_2, buf));
|
||||
auto socket = m_Socket;
|
||||
if (socket)
|
||||
{
|
||||
auto l = len + I2CP_HEADER_SIZE;
|
||||
uint8_t * buf = new uint8_t[l];
|
||||
htobe32buf (buf + I2CP_HEADER_LENGTH_OFFSET, len);
|
||||
buf[I2CP_HEADER_TYPE_OFFSET] = type;
|
||||
memcpy (buf + I2CP_HEADER_SIZE, payload, len);
|
||||
boost::asio::async_write (*socket, boost::asio::buffer (buf, l), boost::asio::transfer_all (),
|
||||
std::bind(&I2CPSession::HandleI2CPMessageSent, shared_from_this (),
|
||||
std::placeholders::_1, std::placeholders::_2, buf));
|
||||
}
|
||||
else
|
||||
LogPrint (eLogError, "I2CP: Can't write to the socket");
|
||||
}
|
||||
|
||||
void I2CPSession::HandleI2CPMessageSent (const boost::system::error_code& ecode, std::size_t bytes_transferred, const uint8_t * buf)
|
||||
|
|
@ -276,21 +317,24 @@ namespace client
|
|||
size_t offset = 0;
|
||||
while (offset < len)
|
||||
{
|
||||
auto semicolon = (const uint8_t *)memchr (buf + offset, ';', len - offset);
|
||||
if (semicolon)
|
||||
std::string param = ExtractString (buf + offset, len - offset);
|
||||
offset += param.length () + 1;
|
||||
if (buf[offset] != '=')
|
||||
{
|
||||
auto l = semicolon - buf - offset + 1;
|
||||
auto equal = (const uint8_t *)memchr (buf + offset, '=', l);
|
||||
if (equal)
|
||||
{
|
||||
auto l1 = equal - buf - offset + 1;
|
||||
mapping.insert (std::make_pair (std::string ((const char *)(buf + offset), l1 -1),
|
||||
std::string ((const char *)(buf + offset + l1), l - l1 - 2)));
|
||||
}
|
||||
offset += l;
|
||||
}
|
||||
else
|
||||
break;
|
||||
LogPrint (eLogWarning, "I2CP: Unexpected character ", buf[offset], " instead '=' after ", param);
|
||||
break;
|
||||
}
|
||||
offset++;
|
||||
|
||||
std::string value = ExtractString (buf + offset, len - offset);
|
||||
offset += value.length () + 1;
|
||||
if (buf[offset] != ';')
|
||||
{
|
||||
LogPrint (eLogWarning, "I2CP: Unexpected character ", buf[offset], " instead ';' after ", value);
|
||||
break;
|
||||
}
|
||||
offset++;
|
||||
mapping.insert (std::make_pair (param, value));
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -311,23 +355,45 @@ namespace client
|
|||
|
||||
void I2CPSession::CreateSessionMessageHandler (const uint8_t * buf, size_t len)
|
||||
{
|
||||
RAND_bytes ((uint8_t *)&m_SessionID, 2);
|
||||
auto identity = std::make_shared<i2p::data::IdentityEx>();
|
||||
size_t offset = identity->FromBuffer (buf, len);
|
||||
if (!offset)
|
||||
{
|
||||
LogPrint (eLogError, "I2CP: create session maformed identity");
|
||||
SendSessionStatusMessage (3); // invalid
|
||||
return;
|
||||
}
|
||||
uint16_t optionsSize = bufbe16toh (buf + offset);
|
||||
offset += 2;
|
||||
|
||||
if (optionsSize > len - offset)
|
||||
{
|
||||
LogPrint (eLogError, "I2CP: options size ", optionsSize, "exceeds message size");
|
||||
SendSessionStatusMessage (3); // invalid
|
||||
return;
|
||||
}
|
||||
std::map<std::string, std::string> params;
|
||||
ExtractMapping (buf + offset, optionsSize, params);
|
||||
offset += optionsSize;
|
||||
offset += optionsSize; // options
|
||||
if (params[I2CP_PARAM_MESSAGE_RELIABILITY] == "none") m_IsSendAccepted = false;
|
||||
|
||||
offset += 8; // date
|
||||
if (identity->Verify (buf, offset, buf + offset)) // signature
|
||||
{
|
||||
bool isPublic = true;
|
||||
if (params[I2CP_PARAM_DONT_PUBLISH_LEASESET] == "true") isPublic = false;
|
||||
m_Destination = std::make_shared<I2CPDestination>(*this, identity, isPublic, params);
|
||||
m_Destination->Start ();
|
||||
SendSessionStatusMessage (1); // created
|
||||
LogPrint (eLogDebug, "I2CP: session ", m_SessionID, " created");
|
||||
if (!m_Destination)
|
||||
{
|
||||
m_Destination = std::make_shared<I2CPDestination>(shared_from_this (), identity, isPublic, params);
|
||||
SendSessionStatusMessage (1); // created
|
||||
LogPrint (eLogDebug, "I2CP: session ", m_SessionID, " created");
|
||||
m_Destination->Start ();
|
||||
}
|
||||
else
|
||||
{
|
||||
LogPrint (eLogError, "I2CP: session already exists");
|
||||
SendSessionStatusMessage (4); // refused
|
||||
}
|
||||
}
|
||||
else
|
||||
{
|
||||
|
|
@ -340,7 +406,11 @@ namespace client
|
|||
{
|
||||
SendSessionStatusMessage (0); // destroy
|
||||
LogPrint (eLogDebug, "I2CP: session ", m_SessionID, " destroyed");
|
||||
Terminate ();
|
||||
if (m_Destination)
|
||||
{
|
||||
m_Destination->Stop ();
|
||||
m_Destination = 0;
|
||||
}
|
||||
}
|
||||
|
||||
void I2CPSession::ReconfigureSessionMessageHandler (const uint8_t * buf, size_t len)
|
||||
|
|
@ -359,6 +429,7 @@ namespace client
|
|||
|
||||
void I2CPSession::SendMessageStatusMessage (uint32_t nonce, I2CPMessageStatus status)
|
||||
{
|
||||
if (!nonce) return; // don't send status with zero nonce
|
||||
uint8_t buf[15];
|
||||
htobe16buf (buf, m_SessionID);
|
||||
htobe32buf (buf + 2, m_MessageID++);
|
||||
|
|
@ -402,7 +473,8 @@ namespace client
|
|||
uint32_t payloadLen = bufbe32toh (buf + offset);
|
||||
offset += 4;
|
||||
uint32_t nonce = bufbe32toh (buf + offset + payloadLen);
|
||||
SendMessageStatusMessage (nonce, eI2CPMessageStatusAccepted); // accepted
|
||||
if (m_IsSendAccepted)
|
||||
SendMessageStatusMessage (nonce, eI2CPMessageStatusAccepted); // accepted
|
||||
m_Destination->SendMsgTo (buf + offset, payloadLen, identity.GetIdentHash (), nonce);
|
||||
}
|
||||
}
|
||||
|
|
@ -418,7 +490,7 @@ namespace client
|
|||
void I2CPSession::HostLookupMessageHandler (const uint8_t * buf, size_t len)
|
||||
{
|
||||
uint16_t sessionID = bufbe16toh (buf);
|
||||
if (sessionID == m_SessionID)
|
||||
if (sessionID == m_SessionID || sessionID == 0xFFFF) // -1 means without session
|
||||
{
|
||||
uint32_t requestID = bufbe32toh (buf + 2);
|
||||
//uint32_t timeout = bufbe32toh (buf + 6);
|
||||
|
|
@ -445,15 +517,17 @@ namespace client
|
|||
return;
|
||||
}
|
||||
|
||||
if (m_Destination)
|
||||
std::shared_ptr<LeaseSetDestination> destination = m_Destination;
|
||||
if(!destination) destination = i2p::client::context.GetSharedLocalDestination ();
|
||||
if (destination)
|
||||
{
|
||||
auto ls = m_Destination->FindLeaseSet (ident);
|
||||
auto ls = destination->FindLeaseSet (ident);
|
||||
if (ls)
|
||||
SendHostReplyMessage (requestID, ls->GetIdentity ());
|
||||
else
|
||||
{
|
||||
auto s = shared_from_this ();
|
||||
m_Destination->RequestDestination (ident,
|
||||
destination->RequestDestination (ident,
|
||||
[s, requestID](std::shared_ptr<i2p::data::LeaseSet> leaseSet)
|
||||
{
|
||||
s->SendHostReplyMessage (requestID, leaseSet ? leaseSet->GetIdentity () : nullptr);
|
||||
|
|
|
|||
8
I2CP.h
8
I2CP.h
|
|
@ -56,14 +56,15 @@ namespace client
|
|||
};
|
||||
|
||||
// params
|
||||
const char I2CP_PARAM_DONT_PUBLISH_LEASESET[] = "i2cp.dontPublishLeaseSet ";
|
||||
const char I2CP_PARAM_DONT_PUBLISH_LEASESET[] = "i2cp.dontPublishLeaseSet";
|
||||
const char I2CP_PARAM_MESSAGE_RELIABILITY[] = "i2cp.messageReliability";
|
||||
|
||||
class I2CPSession;
|
||||
class I2CPDestination: public LeaseSetDestination
|
||||
{
|
||||
public:
|
||||
|
||||
I2CPDestination (I2CPSession& owner, std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params);
|
||||
I2CPDestination (std::shared_ptr<I2CPSession> owner, std::shared_ptr<const i2p::data::IdentityEx> identity, bool isPublic, const std::map<std::string, std::string>& params);
|
||||
|
||||
void SetEncryptionPrivateKey (const uint8_t * key);
|
||||
void LeaseSetCreated (const uint8_t * buf, size_t len); // called from I2CPSession
|
||||
|
|
@ -87,7 +88,7 @@ namespace client
|
|||
|
||||
private:
|
||||
|
||||
I2CPSession& m_Owner;
|
||||
std::shared_ptr<I2CPSession> m_Owner;
|
||||
std::shared_ptr<const i2p::data::IdentityEx> m_Identity;
|
||||
uint8_t m_EncryptionPrivateKey[256];
|
||||
uint64_t m_LeaseSetExpirationTime;
|
||||
|
|
@ -148,6 +149,7 @@ namespace client
|
|||
std::shared_ptr<I2CPDestination> m_Destination;
|
||||
uint16_t m_SessionID;
|
||||
uint32_t m_MessageID;
|
||||
bool m_IsSendAccepted;
|
||||
};
|
||||
typedef void (I2CPSession::*I2CPMessageHandler)(const uint8_t * buf, size_t len);
|
||||
|
||||
|
|
|
|||
|
|
@ -232,6 +232,11 @@ namespace stream
|
|||
bool acknowledged = false;
|
||||
auto ts = i2p::util::GetMillisecondsSinceEpoch ();
|
||||
uint32_t ackThrough = packet->GetAckThrough ();
|
||||
if (ackThrough > m_SequenceNumber)
|
||||
{
|
||||
LogPrint (eLogError, "Streaming: Unexpected ackThrough=", ackThrough, " > seqn=", m_SequenceNumber);
|
||||
return;
|
||||
}
|
||||
int nackCount = packet->GetNACKCount ();
|
||||
for (auto it = m_SentPackets.begin (); it != m_SentPackets.end ();)
|
||||
{
|
||||
|
|
@ -336,9 +341,9 @@ namespace stream
|
|||
htobe32buf (packet + size, m_SequenceNumber++);
|
||||
size += 4; // sequenceNum
|
||||
if (isNoAck)
|
||||
htobe32buf (packet + size, m_LastReceivedSequenceNumber);
|
||||
else
|
||||
htobuf32 (packet + size, 0);
|
||||
else
|
||||
htobe32buf (packet + size, m_LastReceivedSequenceNumber);
|
||||
size += 4; // ack Through
|
||||
packet[size] = 0;
|
||||
size++; // NACK count
|
||||
|
|
@ -521,7 +526,7 @@ namespace stream
|
|||
size += 4; // receiveStreamID
|
||||
htobe32buf (packet + size, m_SequenceNumber++);
|
||||
size += 4; // sequenceNum
|
||||
htobe32buf (packet + size, m_LastReceivedSequenceNumber);
|
||||
htobe32buf (packet + size, m_LastReceivedSequenceNumber >= 0 ? m_LastReceivedSequenceNumber : 0);
|
||||
size += 4; // ack Through
|
||||
packet[size] = 0;
|
||||
size++; // NACK count
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue