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@ -84,11 +84,14 @@ namespace proxy {
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std::shared_ptr<boost::asio::ip::tcp::socket> m_sock;
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std::shared_ptr<boost::asio::ip::tcp::socket> m_proxysock;
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boost::asio::ip::tcp::resolver m_proxy_resolver;
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i2p::http::URL m_RequestURL;
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i2p::http::URL m_ProxyURL;
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std::string m_HTTPMethod;
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i2p::http::URL m_RequestURL;
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uint8_t m_socks_buf[255+8]; // for socks request/response
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ssize_t m_req_len;
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i2p::http::URL m_ClientRequestURL;
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i2p::http::HTTPReq m_ClientRequest;
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i2p::http::HTTPRes m_ClientResponse;
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std::stringstream m_ClientRequestBuffer;
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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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@ -121,6 +124,7 @@ namespace proxy {
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}
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if(m_proxysock)
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{
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LogPrint(eLogDebug, "HTTPProxy: close proxysock");
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if(m_proxysock->is_open())
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m_proxysock->close();
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m_proxysock = nullptr;
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@ -226,24 +230,22 @@ namespace proxy {
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*/
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bool HTTPReqHandler::HandleRequest()
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{
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i2p::http::HTTPReq req;
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std::string b64;
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int req_len = 0;
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req_len = req.parse(m_recv_buf);
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m_req_len = m_ClientRequest.parse(m_recv_buf);
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if (req_len == 0)
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if (m_req_len == 0)
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return false; /* need more data */
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if (req_len < 0) {
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if (m_req_len < 0) {
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LogPrint(eLogError, "HTTPProxy: unable to parse request");
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GenericProxyError("Invalid request", "Proxy unable to parse your request");
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return true; /* parse error */
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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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m_RequestURL.parse(req.uri);
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LogPrint(eLogDebug, "HTTPProxy: requested: ", m_ClientRequest.uri);
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m_RequestURL.parse(m_ClientRequest.uri);
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if (ExtractAddressHelper(m_RequestURL, b64)) {
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i2p::client::context.GetAddressBook ().InsertAddress (m_RequestURL.host, b64);
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@ -256,7 +258,7 @@ namespace proxy {
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return true; /* request processed */
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}
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SanitizeHTTPRequest(req);
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SanitizeHTTPRequest(m_ClientRequest);
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std::string dest_host = m_RequestURL.host;
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uint16_t dest_port = m_RequestURL.port;
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@ -265,14 +267,14 @@ namespace proxy {
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dest_port = (m_RequestURL.schema == "https") ? 443 : 80;
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}
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/* detect dest_host, set proper 'Host' header in upstream request */
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auto h = req.headers.find("Host");
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auto h = m_ClientRequest.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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m_ClientRequest.add_header("Host", h, true);
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} else if (h != m_ClientRequest.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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@ -292,19 +294,17 @@ namespace proxy {
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HostNotFound(dest_host);
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return true; /* request processed */
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}
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/* TODO: outproxy handler here */
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} else {
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std::string outproxyUrl; i2p::config::GetOption("httpproxy.outproxy", outproxyUrl);
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if(outproxyUrl.size()) {
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m_HTTPMethod = req.method;
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LogPrint (eLogDebug, "HTTPProxy: use outproxy ", outproxyUrl);
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if(m_ProxyURL.parse(outproxyUrl))
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ForwardToUpstreamProxy();
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else
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GenericProxyError("Outproxy failure", "bad outproxy settings");
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} else {
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LogPrint (eLogWarning, "HTTPProxy: outproxy failure for ", dest_host, ": not implemented yet");
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std::string message = "Host" + dest_host + "not inside I2P network, but outproxy support not implemented yet";
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LogPrint (eLogWarning, "HTTPProxy: outproxy failure for ", dest_host, ": no outprxy enabled");
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std::string message = "Host" + dest_host + "not inside I2P network, but outproxy is not enabled";
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GenericProxyError("Outproxy failure", message.c_str());
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}
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return true;
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@ -313,12 +313,12 @@ namespace proxy {
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/* make relative url */
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m_RequestURL.schema = "";
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m_RequestURL.host = "";
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req.uri = m_RequestURL.to_string();
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m_ClientRequest.uri = m_RequestURL.to_string();
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/* drop original request from recv buffer */
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m_recv_buf.erase(0, req_len);
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m_recv_buf.erase(0, m_req_len);
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/* build new buffer from modified request and data from original request */
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m_send_buf = req.to_string();
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m_send_buf = m_ClientRequest.to_string();
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m_send_buf.append(m_recv_buf);
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/* connect to destination */
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LogPrint(eLogDebug, "HTTPProxy: connecting to host ", dest_host, ":", dest_port);
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@ -330,6 +330,17 @@ namespace proxy {
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void HTTPReqHandler::ForwardToUpstreamProxy()
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{
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LogPrint(eLogDebug, "HTTPProxy: forward to upstream");
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// build http requset
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m_ClientRequestURL = m_RequestURL;
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LogPrint(eLogDebug, "HTTPProxy: ", m_ClientRequestURL.host);
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m_ClientRequestURL.schema = "";
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m_ClientRequestURL.host = "";
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m_ClientRequest.uri = m_ClientRequestURL.to_string();
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m_ClientRequest.write(m_ClientRequestBuffer);
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m_ClientRequestBuffer << m_recv_buf.substr(m_req_len);
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// assume http if empty schema
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if (m_ProxyURL.schema == "" || m_ProxyURL.schema == "http") {
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// handle upstream http proxy
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@ -365,59 +376,67 @@ namespace proxy {
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return;
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}
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uint16_t port = m_RequestURL.port;
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if(!port) port = 80;
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LogPrint(eLogDebug, "HTTPProxy: connected to socks upstream");
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if(m_HTTPMethod == "CONNECT") {
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std::string host = m_RequestURL.host;
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std::size_t reqsize = 0;
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m_socks_buf[0] = '\x04';
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m_socks_buf[1] = 1;
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htobe16buf(m_socks_buf+2, port);
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m_socks_buf[4] = 0;
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m_socks_buf[5] = 0;
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m_socks_buf[6] = 0;
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m_socks_buf[7] = 1;
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// user id
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m_socks_buf[8] = 'i';
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m_socks_buf[9] = '2';
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m_socks_buf[10] = 'p';
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m_socks_buf[11] = 'd';
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m_socks_buf[12] = 0;
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reqsize += 13;
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memcpy(m_socks_buf+ reqsize, host.c_str(), host.size());
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reqsize += host.size();
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m_socks_buf[++reqsize] = 0;
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m_proxysock->async_write_some(boost::asio::buffer(m_socks_buf, reqsize), std::bind(&HTTPReqHandler::HandleSocksProxySendHandshake, this, std::placeholders::_1, std::placeholders::_2));
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} else {
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GenericProxyError("unsupported http method", m_HTTPMethod.c_str());
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}
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std::string host = m_RequestURL.host;
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std::size_t reqsize = 0;
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m_socks_buf[0] = '\x04';
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m_socks_buf[1] = 1;
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htobe16buf(m_socks_buf+2, port);
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m_socks_buf[4] = 0;
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m_socks_buf[5] = 0;
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m_socks_buf[6] = 0;
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m_socks_buf[7] = 1;
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// user id
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m_socks_buf[8] = 'i';
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m_socks_buf[9] = '2';
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m_socks_buf[10] = 'p';
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m_socks_buf[11] = 'd';
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m_socks_buf[12] = 0;
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reqsize += 13;
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memcpy(m_socks_buf+ reqsize, host.c_str(), host.size());
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reqsize += host.size();
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m_socks_buf[++reqsize] = 0;
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boost::asio::async_write(*m_proxysock, boost::asio::buffer(m_socks_buf, reqsize), boost::asio::transfer_all(), std::bind(&HTTPReqHandler::HandleSocksProxySendHandshake, this, std::placeholders::_1, std::placeholders::_2));
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} else GenericProxyError("cannot connect to upstream socks proxy", ec.message().c_str());
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}
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void HTTPReqHandler::HandleSocksProxySendHandshake(const boost::system::error_code & ec, std::size_t bytes_transferred)
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{
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LogPrint(eLogDebug, "HTTPProxy: upstream socks handshake sent");
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if(ec) GenericProxyError("Cannot negotiate with socks proxy", ec.message().c_str());
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else m_proxysock->async_read_some(boost::asio::buffer(m_socks_buf, 8), std::bind(&HTTPReqHandler::HandleSocksProxyReply, this, std::placeholders::_1, std::placeholders::_2));
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}
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void HTTPReqHandler::HandoverToUpstreamProxy()
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{
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auto connection = std::make_shared<i2p::client::TCPIPPipe>(GetOwner(), m_proxysock, m_sock);
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m_sock = nullptr;
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m_proxysock = nullptr;
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GetOwner()->AddHandler(connection);
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connection->Start();
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Terminate();
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LogPrint(eLogDebug, "HTTPProxy: handover to socks proxy");
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auto connection = std::make_shared<i2p::client::TCPIPPipe>(GetOwner(), m_proxysock, m_sock);
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m_sock = nullptr;
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m_proxysock = nullptr;
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GetOwner()->AddHandler(connection);
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connection->Start();
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Terminate();
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}
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void HTTPReqHandler::SocksProxySuccess()
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{
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i2p::http::HTTPRes res;
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res.code = 200;
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std::string response = res.to_string();
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boost::asio::async_write(*m_sock, boost::asio::buffer(response), boost::asio::transfer_all(), [&] (const boost::system::error_code & ec, std::size_t transferred) {
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if(ec) GenericProxyError("socks proxy error", ec.message().c_str());
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else HandoverToUpstreamProxy();
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});
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if(m_ClientRequest.method == "CONNECT") {
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m_ClientResponse.code = 200;
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m_send_buf = m_ClientResponse.to_string();
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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) {
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if(ec) GenericProxyError("socks proxy error", ec.message().c_str());
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else HandoverToUpstreamProxy();
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});
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} else {
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m_send_buf = m_ClientRequestBuffer.str();
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LogPrint(eLogDebug, "HTTPProxy: send ", m_send_buf.size(), " bytes");
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boost::asio::async_write(*m_proxysock, boost::asio::buffer(m_send_buf), boost::asio::transfer_all(), [&](const boost::system::error_code & ec, std::size_t transferred) {
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if(ec) GenericProxyError("failed to send request to upstream", ec.message().c_str());
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else HandoverToUpstreamProxy();
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});
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}
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}
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void HTTPReqHandler::HandleSocksProxyReply(const boost::system::error_code & ec, std::size_t bytes_transferred)
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@ -429,6 +448,7 @@ namespace proxy {
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SocksProxySuccess();
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} else {
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std::stringstream ss;
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ss << "error code: ";
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ss << (int) m_socks_buf[1];
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std::string msg = ss.str();
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GenericProxyError("Socks Proxy error", msg.c_str());
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