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Create I2Pservice as a way to integrate service management, hide unnecessary handlers

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pull/143/head
Francisco Blas (klondike) Izquierdo Riera 9 years ago
parent 88560d06a1
commit dd42819a2f
13 changed files with 321 additions and 327 deletions
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8
BOB.cpp
Unescape Escape View File

@ -28,7 +28,7 @@ namespace client
void BOBI2PInboundTunnel::Stop ()
{
m_Acceptor.close();
ClearConnections ();
ClearHandlers ();
}
void BOBI2PInboundTunnel::Accept ()
@ -136,7 +136,7 @@ namespace client
{
LogPrint ("New BOB inbound connection");
auto connection = std::make_shared<I2PTunnelConnection>(this, receiver->socket, leaseSet);
AddConnection (connection);
AddHandler (connection);
connection->I2PConnect (receiver->data, receiver->dataLen);
delete receiver;
}
@ -154,7 +154,7 @@ namespace client
void BOBI2POutboundTunnel::Stop ()
{
ClearConnections ();
ClearHandlers ();
}
void BOBI2POutboundTunnel::Accept ()
@ -171,7 +171,7 @@ namespace client
if (stream)
{
auto conn = std::make_shared<I2PTunnelConnection> (this, stream, new boost::asio::ip::tcp::socket (GetService ()), m_Endpoint, m_IsQuiet);
AddConnection (conn);
AddHandler (conn);
conn->Connect ();
}
}

5
BOB.h
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@ -8,6 +8,7 @@
#include <string>
#include <boost/asio.hpp>
#include "I2PTunnel.h"
#include "I2PService.h"
#include "Identity.h"
#include "LeaseSet.h"
@ -41,12 +42,12 @@ namespace client
const char BOB_REPLY_ERROR[] = "ERROR %s\n";
const char BOB_DATA[] = "NICKNAME %s\n";
class BOBI2PTunnel: public I2PTunnel
class BOBI2PTunnel: public I2PService
{
public:
BOBI2PTunnel (ClientDestination * localDestination):
I2PTunnel (localDestination) {};
I2PService (localDestination) {};
virtual void Start () {};
virtual void Stop () {};

81
HTTPProxy.cpp
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@ -2,16 +2,61 @@
#include <cassert>
#include <boost/lexical_cast.hpp>
#include <boost/regex.hpp>
#include <string>
#include <atomic>
#include "HTTPProxy.h"
#include "Identity.h"
#include "Streaming.h"
#include "Destination.h"
#include "ClientContext.h"
#include "I2PEndian.h"
#include "I2PTunnel.h"
namespace i2p
{
namespace proxy
{
static const size_t http_buffer_size = 8192;
class HTTPProxyHandler: public i2p::client::I2PServiceHandler, public std::enable_shared_from_this<HTTPProxyHandler> {
private:
enum state {
GET_METHOD,
GET_HOSTNAME,
GET_HTTPV,
GET_HTTPVNL, //TODO: fallback to finding HOst: header if needed
DONE
};
void EnterState(state nstate);
bool HandleData(uint8_t *http_buff, std::size_t len);
void HandleSockRecv(const boost::system::error_code & ecode, std::size_t bytes_transfered);
void Terminate();
void AsyncSockRead();
void HTTPRequestFailed(/*std::string message*/);
void ExtractRequest();
bool ValidateHTTPRequest();
bool CreateHTTPRequest(uint8_t *http_buff, std::size_t len);
void SentHTTPFailed(const boost::system::error_code & ecode);
void HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream);
uint8_t m_http_buff[http_buffer_size];
boost::asio::ip::tcp::socket * m_sock;
std::string m_request; //Data left to be sent
std::string m_url; //URL
std::string m_method; //Method
std::string m_version; //HTTP version
std::string m_address; //Address
std::string m_path; //Path
int m_port; //Port
state m_state;//Parsing state
public:
HTTPProxyHandler(HTTPProxyServer * parent, boost::asio::ip::tcp::socket * sock) :
I2PServiceHandler(parent), m_sock(sock)
{ AsyncSockRead(); EnterState(GET_METHOD); }
~HTTPProxyHandler() { Terminate(); }
};
void HTTPProxyHandler::AsyncSockRead()
{
LogPrint(eLogDebug,"--- HTTP Proxy async sock read");
@ -24,19 +69,15 @@ namespace proxy
}
}
void HTTPProxyHandler::Done() {
if (m_parent) m_parent->RemoveHandler (shared_from_this ());
}
void HTTPProxyHandler::Terminate() {
if (dead.exchange(true)) return;
if (Kill()) return;
if (m_sock) {
LogPrint(eLogDebug,"--- HTTP Proxy close sock");
m_sock->close();
delete m_sock;
m_sock = nullptr;
}
Done();
Done(shared_from_this());
}
/* All hope is lost beyond this point */
@ -155,7 +196,7 @@ namespace proxy
if (HandleData(m_http_buff, len)) {
if (m_state == DONE) {
LogPrint(eLogInfo,"--- HTTP Proxy requested: ", m_url);
m_parent->GetLocalDestination ()->CreateStream (
GetOwner()->GetLocalDestination ()->CreateStream (
std::bind (&HTTPProxyHandler::HandleStreamRequestComplete,
this, std::placeholders::_1), m_address, m_port);
} else {
@ -178,12 +219,12 @@ namespace proxy
void HTTPProxyHandler::HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream)
{
if (stream) {
if (dead.exchange(true)) return;
if (Kill()) return;
LogPrint (eLogInfo,"--- HTTP Proxy New I2PTunnel connection");
auto connection = std::make_shared<i2p::client::I2PTunnelConnection>((i2p::client::I2PTunnel *)m_parent, m_sock, stream);
m_parent->AddConnection (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();
Done(shared_from_this());
} else {
LogPrint (eLogError,"--- HTTP Proxy Issue when creating the stream, check the previous warnings for more info.");
HTTPRequestFailed(); // TODO: Send correct error message host unreachable
@ -200,7 +241,6 @@ namespace proxy
{
m_Acceptor.close();
m_Timer.cancel ();
ClearConnections ();
ClearHandlers();
}
@ -211,23 +251,6 @@ namespace proxy
std::placeholders::_1, newSocket));
}
void HTTPProxyServer::AddHandler (std::shared_ptr<HTTPProxyHandler> handler) {
std::unique_lock<std::mutex> l(m_HandlersMutex);
m_Handlers.insert (handler);
}
void HTTPProxyServer::RemoveHandler (std::shared_ptr<HTTPProxyHandler> handler)
{
std::unique_lock<std::mutex> l(m_HandlersMutex);
m_Handlers.erase (handler);
}
void HTTPProxyServer::ClearHandlers ()
{
std::unique_lock<std::mutex> l(m_HandlersMutex);
m_Handlers.clear ();
}
void HTTPProxyServer::HandleAccept (const boost::system::error_code& ecode, boost::asio::ip::tcp::socket * socket)
{
if (!ecode)

61
HTTPProxy.h
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@ -2,67 +2,17 @@
#define HTTP_PROXY_H__
#include <memory>
#include <string>
#include <set>
#include <boost/asio.hpp>
#include <mutex>
#include <atomic>
#include "Identity.h"
#include "Streaming.h"
#include "I2PTunnel.h"
#include "I2PService.h"
namespace i2p
{
namespace proxy
{
const size_t http_buffer_size = 8192;
class HTTPProxyServer;
class HTTPProxyHandler: public std::enable_shared_from_this<HTTPProxyHandler> {
private:
enum state {
GET_METHOD,
GET_HOSTNAME,
GET_HTTPV,
GET_HTTPVNL, //TODO: fallback to finding HOst: header if needed
DONE
};
void EnterState(state nstate);
bool HandleData(uint8_t *http_buff, std::size_t len);
void HandleSockRecv(const boost::system::error_code & ecode, std::size_t bytes_transfered);
void Done();
void Terminate();
void AsyncSockRead();
void HTTPRequestFailed(/*std::string message*/);
void ExtractRequest();
bool ValidateHTTPRequest();
bool CreateHTTPRequest(uint8_t *http_buff, std::size_t len);
void SentHTTPFailed(const boost::system::error_code & ecode);
void HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream);
uint8_t m_http_buff[http_buffer_size];
HTTPProxyServer * m_parent;
boost::asio::ip::tcp::socket * m_sock;
std::string m_request; //Data left to be sent
std::string m_url; //URL
std::string m_method; //Method
std::string m_version; //HTTP version
std::string m_address; //Address
std::string m_path; //Path
int m_port; //Port
std::atomic<bool> dead; //To avoid cleaning up multiple times
state m_state;//Parsing state
public:
HTTPProxyHandler(HTTPProxyServer * parent, boost::asio::ip::tcp::socket * sock) :
m_parent(parent), m_sock(sock), dead(false)
{ AsyncSockRead(); EnterState(GET_METHOD); }
~HTTPProxyHandler() { Terminate(); }
};
class HTTPProxyServer: public i2p::client::I2PTunnel
class HTTPProxyHandler;
class HTTPProxyServer: public i2p::client::I2PService
{
private:
std::set<std::shared_ptr<HTTPProxyHandler> > m_Handlers;
@ -76,16 +26,13 @@ namespace proxy
void HandleAccept(const boost::system::error_code& ecode, boost::asio::ip::tcp::socket * socket);
public:
HTTPProxyServer(int port) : I2PTunnel(nullptr),
HTTPProxyServer(int port) : I2PService(nullptr),
m_Acceptor (GetService (), boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port)),
m_Timer (GetService ()) {};
~HTTPProxyServer() { Stop(); }
void Start ();
void Stop ();
void AddHandler (std::shared_ptr<HTTPProxyHandler> handler);
void RemoveHandler (std::shared_ptr<HTTPProxyHandler> handler);
void ClearHandlers ();
};
typedef HTTPProxyServer HTTPProxy;

19
I2PService.cpp
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@ -0,0 +1,19 @@
#include "Destination.h"
#include "Identity.h"
#include "ClientContext.h"
#include "I2PService.h"
namespace i2p
{
namespace client
{
static const i2p::data::SigningKeyType I2P_SERVICE_DEFAULT_KEY_TYPE = i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA256_P256;
I2PService::I2PService (ClientDestination * localDestination):
m_LocalDestination (localDestination ? localDestination :
i2p::client::context.CreateNewLocalDestination (false, I2P_SERVICE_DEFAULT_KEY_TYPE))
{
}
}
}

73
I2PService.h
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@ -0,0 +1,73 @@
#ifndef I2PSERVICE_H__
#define I2PSERVICE_H__
#include <atomic>
#include <mutex>
#include <unordered_set>
#include <memory>
#include <boost/asio.hpp>
#include "Destination.h"
#include "Identity.h"
namespace i2p
{
namespace client
{
class I2PServiceHandler;
class I2PService
{
public:
I2PService (ClientDestination * localDestination = nullptr);
virtual ~I2PService () { ClearHandlers (); }
inline void AddHandler (std::shared_ptr<I2PServiceHandler> conn) {
std::unique_lock<std::mutex> l(m_HandlersMutex);
m_Handlers.insert(conn);
}
inline void RemoveHandler (std::shared_ptr<I2PServiceHandler> conn) {
std::unique_lock<std::mutex> l(m_HandlersMutex);
m_Handlers.erase(conn);
}
inline void ClearHandlers () {
std::unique_lock<std::mutex> l(m_HandlersMutex);
m_Handlers.clear();
}
inline ClientDestination * GetLocalDestination () { return m_LocalDestination; };
inline void SetLocalDestination (ClientDestination * dest) { m_LocalDestination = dest; };
inline boost::asio::io_service& GetService () { return m_LocalDestination->GetService (); };
virtual void Start () = 0;
virtual void Stop () = 0;
private:
ClientDestination * m_LocalDestination;
std::unordered_set<std::shared_ptr<I2PServiceHandler> > m_Handlers;
std::mutex m_HandlersMutex;
};
/*Simple interface for I2PHandlers, allows detection of finalization amongst other things */
class I2PServiceHandler
{
public:
I2PServiceHandler(I2PService * parent) : m_Dead(false), m_Service(parent) { }
virtual ~I2PServiceHandler() { }
protected:
// Call when terminating or handing over to avoid race conditions
inline bool Kill() { return m_Dead.exchange(true); }
// Call to know if the handler is dead
inline bool Dead() { return m_Dead; }
// Call when done to clean up (make sure Kill is called first)
inline void Done(std::shared_ptr<I2PServiceHandler> me) { if(m_Service) m_Service->RemoveHandler(me); }
// Call to talk with the owner
inline I2PService * GetOwner() { return m_Service; }
private:
I2PService *m_Service;
std::atomic<bool> m_Dead; //To avoid cleaning up multiple times
};
}
}
#endif

53
I2PTunnel.cpp
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@ -9,24 +9,25 @@ namespace i2p
{
namespace client
{
I2PTunnelConnection::I2PTunnelConnection (I2PTunnel * owner,
I2PTunnelConnection::I2PTunnelConnection (I2PService * owner,
boost::asio::ip::tcp::socket * socket, const i2p::data::LeaseSet * leaseSet):
m_Socket (socket), m_Owner (owner), m_RemoteEndpoint (socket->remote_endpoint ()),
I2PServiceHandler(owner), m_Socket (socket), m_RemoteEndpoint (socket->remote_endpoint ()),
m_IsQuiet (true)
{
m_Stream = m_Owner->GetLocalDestination ()->CreateStream (*leaseSet);
m_Stream = GetOwner()->GetLocalDestination ()->CreateStream (*leaseSet);
}
I2PTunnelConnection::I2PTunnelConnection (I2PTunnel * owner,
I2PTunnelConnection::I2PTunnelConnection (I2PService * owner,
boost::asio::ip::tcp::socket * socket, std::shared_ptr<i2p::stream::Stream> stream):
m_Socket (socket), m_Stream (stream), m_Owner (owner),
I2PServiceHandler(owner), m_Socket (socket), m_Stream (stream),
m_RemoteEndpoint (socket->remote_endpoint ()), m_IsQuiet (true)
{
}
I2PTunnelConnection::I2PTunnelConnection (I2PTunnel * owner, std::shared_ptr<i2p::stream::Stream> stream,
I2PTunnelConnection::I2PTunnelConnection (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream,
boost::asio::ip::tcp::socket * socket, const boost::asio::ip::tcp::endpoint& target, bool quiet):
m_Socket (socket), m_Stream (stream), m_Owner (owner), m_RemoteEndpoint (target), m_IsQuiet (quiet)
I2PServiceHandler(owner), m_Socket (socket), m_Stream (stream),
m_RemoteEndpoint (target), m_IsQuiet (quiet)
{
}
@ -56,15 +57,15 @@ namespace client
}
void I2PTunnelConnection::Terminate ()
{
{
if (Kill()) return;
if (m_Stream)
{
m_Stream->Close ();
m_Stream.reset ();
}
m_Socket->close ();
if (m_Owner)
m_Owner->RemoveConnection (shared_from_this ());
Done(shared_from_this ());
}
void I2PTunnelConnection::Receive ()
@ -150,28 +151,8 @@ namespace client
}
}
I2PTunnel::I2PTunnel (ClientDestination * localDestination) :
m_LocalDestination (localDestination ? localDestination :
i2p::client::context.CreateNewLocalDestination (false, I2P_TUNNEL_DEFAULT_KEY_TYPE))
{
}
void I2PTunnel::AddConnection (std::shared_ptr<I2PTunnelConnection> conn)
{
m_Connections.insert (conn);
}
void I2PTunnel::RemoveConnection (std::shared_ptr<I2PTunnelConnection> conn)
{
m_Connections.erase (conn);
}
void I2PTunnel::ClearConnections ()
{
m_Connections.clear ();
}
I2PClientTunnel::I2PClientTunnel (const std::string& destination, int port, ClientDestination * localDestination):
I2PTunnel (localDestination),
I2PService (localDestination),
m_Acceptor (GetService (), boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port)),
m_Timer (GetService ()), m_Destination (destination), m_DestinationIdentHash (nullptr)
{
@ -193,7 +174,7 @@ namespace client
{
m_Acceptor.close();
m_Timer.cancel ();
ClearConnections ();
ClearHandlers ();
auto *originalIdentHash = m_DestinationIdentHash;
m_DestinationIdentHash = nullptr;
delete originalIdentHash;
@ -250,7 +231,7 @@ namespace client
{
LogPrint (eLogInfo,"New I2PTunnel connection");
auto connection = std::make_shared<I2PTunnelConnection>(this, socket, stream);
AddConnection (connection);
AddHandler (connection);
connection->I2PConnect ();
}
else
@ -261,7 +242,7 @@ namespace client
}
I2PServerTunnel::I2PServerTunnel (const std::string& address, int port, ClientDestination * localDestination):
I2PTunnel (localDestination), m_Endpoint (boost::asio::ip::address::from_string (address), port)
I2PService (localDestination), m_Endpoint (boost::asio::ip::address::from_string (address), port)
{
}
@ -272,7 +253,7 @@ namespace client
void I2PServerTunnel::Stop ()
{
ClearConnections ();
ClearHandlers ();
}
void I2PServerTunnel::Accept ()
@ -289,7 +270,7 @@ namespace client
if (stream)
{
auto conn = std::make_shared<I2PTunnelConnection> (this, stream, new boost::asio::ip::tcp::socket (GetService ()), m_Endpoint);
AddConnection (conn);
AddHandler (conn);
conn->Connect ();
}
}

43
I2PTunnel.h
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@ -9,6 +9,7 @@
#include "Identity.h"
#include "Destination.h"
#include "Streaming.h"
#include "I2PService.h"
namespace i2p
{
@ -17,21 +18,19 @@ namespace client
const size_t I2P_TUNNEL_CONNECTION_BUFFER_SIZE = 8192;
const int I2P_TUNNEL_CONNECTION_MAX_IDLE = 3600; // in seconds
const int I2P_TUNNEL_DESTINATION_REQUEST_TIMEOUT = 10; // in seconds
const i2p::data::SigningKeyType I2P_TUNNEL_DEFAULT_KEY_TYPE = i2p::data::SIGNING_KEY_TYPE_ECDSA_SHA256_P256;
class I2PTunnel;
class I2PTunnelConnection: public std::enable_shared_from_this<I2PTunnelConnection>
class I2PTunnelConnection: public I2PServiceHandler, public std::enable_shared_from_this<I2PTunnelConnection>
{
public:
I2PTunnelConnection (I2PTunnel * owner, boost::asio::ip::tcp::socket * socket,
I2PTunnelConnection (I2PService * owner, boost::asio::ip::tcp::socket * socket,
const i2p::data::LeaseSet * leaseSet); // to I2P
I2PTunnelConnection (I2PTunnel * owner, boost::asio::ip::tcp::socket * socket,
I2PTunnelConnection (I2PService * owner, boost::asio::ip::tcp::socket * socket,
std::shared_ptr<i2p::stream::Stream> stream); // to I2P using simplified API :)
I2PTunnelConnection (I2PTunnel * owner, std::shared_ptr<i2p::stream::Stream> stream, boost::asio::ip::tcp::socket * socket,
I2PTunnelConnection (I2PService * owner, std::shared_ptr<i2p::stream::Stream> stream, boost::asio::ip::tcp::socket * socket,
const boost::asio::ip::tcp::endpoint& target, bool quiet = true); // from I2P
~I2PTunnelConnection ();
void I2PConnect (const uint8_t * msg = nullptr, size_t len = 0);
void Connect ();
@ -52,33 +51,11 @@ namespace client
uint8_t m_Buffer[I2P_TUNNEL_CONNECTION_BUFFER_SIZE], m_StreamBuffer[I2P_TUNNEL_CONNECTION_BUFFER_SIZE];
boost::asio::ip::tcp::socket * m_Socket;
std::shared_ptr<i2p::stream::Stream> m_Stream;
I2PTunnel * m_Owner;
boost::asio::ip::tcp::endpoint m_RemoteEndpoint;
bool m_IsQuiet; // don't send destination
};
class I2PTunnel
{
public:
I2PTunnel (ClientDestination * localDestination = nullptr);
virtual ~I2PTunnel () { ClearConnections (); };
void AddConnection (std::shared_ptr<I2PTunnelConnection> conn);
void RemoveConnection (std::shared_ptr<I2PTunnelConnection> conn);
void ClearConnections ();
ClientDestination * GetLocalDestination () { return m_LocalDestination; };
void SetLocalDestination (ClientDestination * dest) { m_LocalDestination = dest; };
boost::asio::io_service& GetService () { return m_LocalDestination->GetService (); };
private:
};
ClientDestination * m_LocalDestination;
std::set<std::shared_ptr<I2PTunnelConnection> > m_Connections;
};
class I2PClientTunnel: public I2PTunnel
class I2PClientTunnel: public I2PService
{
public:
@ -103,7 +80,7 @@ namespace client
const i2p::data::IdentHash * m_DestinationIdentHash;
};
class I2PServerTunnel: public I2PTunnel
class I2PServerTunnel: public I2PService
{
public:
@ -121,7 +98,7 @@ namespace client
boost::asio::ip::tcp::endpoint m_Endpoint;
};
}
}
}
#endif

160
SOCKS.cpp
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@ -1,15 +1,137 @@
#include <cstring>
#include <cassert>
#include <string>
#include <atomic>
#include "SOCKS.h"
#include "Identity.h"
#include "Streaming.h"
#include "Destination.h"
#include "ClientContext.h"
#include "I2PEndian.h"
#include "I2PTunnel.h"
namespace i2p
{
namespace proxy
{
static const size_t socks_buffer_size = 8192;
static const size_t max_socks_hostname_size = 255; // Limit for socks5 and bad idea to traverse
struct SOCKSDnsAddress {
uint8_t size;
char value[max_socks_hostname_size];
void FromString (std::string str) {
size = str.length();
if (str.length() > max_socks_hostname_size) size = max_socks_hostname_size;
memcpy(value,str.c_str(),size);
}
std::string ToString() { return std::string(value, size); }
void push_back (char c) { value[size++] = c; }
};
class SOCKSServer;
class SOCKSHandler: public i2p::client::I2PServiceHandler, public std::enable_shared_from_this<SOCKSHandler> {
private:
enum state {
GET_SOCKSV,
GET_COMMAND,
GET_PORT,
GET_IPV4,
GET4_IDENT,
GET4A_HOST,
GET5_AUTHNUM,
GET5_AUTH,
GET5_REQUESTV,
GET5_GETRSV,
GET5_GETADDRTYPE,
GET5_IPV6,
GET5_HOST_SIZE,
GET5_HOST,
DONE
};
enum authMethods {
AUTH_NONE = 0, //No authentication, skip to next step
AUTH_GSSAPI = 1, //GSSAPI authentication
AUTH_USERPASSWD = 2, //Username and password
AUTH_UNACCEPTABLE = 0xff //No acceptable method found
};
enum addrTypes {
ADDR_IPV4 = 1, //IPv4 address (4 octets)
ADDR_DNS = 3, // DNS name (up to 255 octets)
ADDR_IPV6 = 4 //IPV6 address (16 octets)
};
enum errTypes {
SOCKS5_OK = 0, // No error for SOCKS5
SOCKS5_GEN_FAIL = 1, // General server failure
SOCKS5_RULE_DENIED = 2, // Connection disallowed by ruleset
SOCKS5_NET_UNREACH = 3, // Network unreachable
SOCKS5_HOST_UNREACH = 4, // Host unreachable
SOCKS5_CONN_REFUSED = 5, // Connection refused by the peer
SOCKS5_TTL_EXPIRED = 6, // TTL Expired
SOCKS5_CMD_UNSUP = 7, // Command unsuported
SOCKS5_ADDR_UNSUP = 8, // Address type unsuported
SOCKS4_OK = 90, // No error for SOCKS4
SOCKS4_FAIL = 91, // Failed establishing connecting or not allowed
SOCKS4_IDENTD_MISSING = 92, // Couldn't connect to the identd server
SOCKS4_IDENTD_DIFFER = 93 // The ID reported by the application and by identd differ
};
enum cmdTypes {
CMD_CONNECT = 1, // TCP Connect
CMD_BIND = 2, // TCP Bind
CMD_UDP = 3 // UDP associate
};
enum socksVersions {
SOCKS4 = 4, // SOCKS4
SOCKS5 = 5 // SOCKS5
};
union address {
uint32_t ip;
SOCKSDnsAddress dns;
uint8_t ipv6[16];
};
void EnterState(state nstate, uint8_t parseleft = 1);
bool HandleData(uint8_t *sock_buff, std::size_t len);
bool ValidateSOCKSRequest();
void HandleSockRecv(const boost::system::error_code & ecode, std::size_t bytes_transfered);
void Terminate();
void AsyncSockRead();
boost::asio::const_buffers_1 GenerateSOCKS5SelectAuth(authMethods method);
boost::asio::const_buffers_1 GenerateSOCKS4Response(errTypes error, uint32_t ip, uint16_t port);
boost::asio::const_buffers_1 GenerateSOCKS5Response(errTypes error, addrTypes type, const address &addr, uint16_t port);
bool Socks5ChooseAuth();
void SocksRequestFailed(errTypes error);
void SocksRequestSuccess();
void SentSocksFailed(const boost::system::error_code & ecode);
void SentSocksDone(const boost::system::error_code & ecode);
void SentSocksResponse(const boost::system::error_code & ecode);
void HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream);
uint8_t m_sock_buff[socks_buffer_size];
boost::asio::ip::tcp::socket * m_sock;
std::shared_ptr<i2p::stream::Stream> m_stream;
uint8_t *m_remaining_data; //Data left to be sent
uint8_t m_response[7+max_socks_hostname_size];
address m_address; //Address
std::size_t m_remaining_data_len; //Size of the data left to be sent
uint32_t m_4aip; //Used in 4a requests
uint16_t m_port;
uint8_t m_command;
uint8_t m_parseleft; //Octets left to parse
authMethods m_authchosen; //Authentication chosen
addrTypes m_addrtype; //Address type chosen
socksVersions m_socksv; //Socks version
cmdTypes m_cmd; // Command requested
state m_state;
public:
SOCKSHandler(SOCKSServer * parent, boost::asio::ip::tcp::socket * sock) :
I2PServiceHandler(parent), m_sock(sock), m_stream(nullptr),
m_authchosen(AUTH_UNACCEPTABLE), m_addrtype(ADDR_IPV4)
{ m_address.ip = 0; EnterState(GET_SOCKSV); AsyncSockRead(); }
~SOCKSHandler() { Terminate(); }
};
void SOCKSHandler::AsyncSockRead()
{
LogPrint(eLogDebug,"--- SOCKS async sock read");
@ -22,12 +144,8 @@ namespace proxy
}
}
void SOCKSHandler::Done() {
if (m_parent) m_parent->RemoveHandler (shared_from_this ());
}
void SOCKSHandler::Terminate() {
if (dead.exchange(true)) return;
if (Kill()) return;
if (m_sock) {
LogPrint(eLogDebug,"--- SOCKS close sock");
m_sock->close();
@ -38,7 +156,7 @@ namespace proxy
LogPrint(eLogDebug,"--- SOCKS close stream");
m_stream.reset ();
}
Done();
Done(shared_from_this());
}
boost::asio::const_buffers_1 SOCKSHandler::GenerateSOCKS4Response(SOCKSHandler::errTypes error, uint32_t ip, uint16_t port)
@ -125,7 +243,7 @@ namespace proxy
break;
case SOCKS5:
LogPrint(eLogInfo,"--- SOCKS5 connection success");
auto s = i2p::client::context.GetAddressBook().ToAddress(m_parent->GetLocalDestination()->GetIdentHash());
auto s = i2p::client::context.GetAddressBook().ToAddress(GetOwner()->GetLocalDestination()->GetIdentHash());
address ad; ad.dns.FromString(s);
//HACK only 16 bits passed in port as SOCKS5 doesn't allow for more
response = GenerateSOCKS5Response(SOCKS5_OK, ADDR_DNS, ad, m_stream->GetRecvStreamID());
@ -336,7 +454,7 @@ namespace proxy
if (HandleData(m_sock_buff, len)) {
if (m_state == DONE) {
LogPrint(eLogInfo,"--- SOCKS requested ", m_address.dns.ToString(), ":" , m_port);
m_parent->GetLocalDestination ()->CreateStream (
GetOwner()->GetLocalDestination ()->CreateStream (
std::bind (&SOCKSHandler::HandleStreamRequestComplete,
this, std::placeholders::_1), m_address.dns.ToString(), m_port);
} else {
@ -359,12 +477,12 @@ namespace proxy
void SOCKSHandler::SentSocksDone(const boost::system::error_code & ecode)
{
if (!ecode) {
if (dead.exchange(true)) return;
if (Kill()) return;
LogPrint (eLogInfo,"--- SOCKS New I2PTunnel connection");
auto connection = std::make_shared<i2p::client::I2PTunnelConnection>((i2p::client::I2PTunnel *)m_parent, m_sock, m_stream);
m_parent->AddConnection (connection);
auto connection = std::make_shared<i2p::client::I2PTunnelConnection>(GetOwner(), m_sock, m_stream);
GetOwner()->AddHandler (connection);
connection->I2PConnect (m_remaining_data,m_remaining_data_len);
Done();
Done(shared_from_this());
}
else
{
@ -402,7 +520,6 @@ namespace proxy
{
m_Acceptor.close();
m_Timer.cancel ();
ClearConnections ();
ClearHandlers();
}
@ -413,23 +530,6 @@ namespace proxy
std::placeholders::_1, newSocket));
}
void SOCKSServer::AddHandler (std::shared_ptr<SOCKSHandler> handler) {
std::unique_lock<std::mutex> l(m_HandlersMutex);
m_Handlers.insert (handler);
}
void SOCKSServer::RemoveHandler (std::shared_ptr<SOCKSHandler> handler)
{
std::unique_lock<std::mutex> l(m_HandlersMutex);
m_Handlers.erase (handler);
}
void SOCKSServer::ClearHandlers ()
{
std::unique_lock<std::mutex> l(m_HandlersMutex);
m_Handlers.clear ();
}
void SOCKSServer::HandleAccept (const boost::system::error_code& ecode, boost::asio::ip::tcp::socket * socket)
{
if (!ecode)

136
SOCKS.h
Unescape Escape View File

@ -2,142 +2,17 @@
#define SOCKS_H__
#include <memory>
#include <string>
#include <set>
#include <boost/asio.hpp>
#include <mutex>
#include <atomic>
#include "Identity.h"
#include "Streaming.h"
#include "I2PTunnel.h"
#include "I2PService.h"
namespace i2p
{
namespace proxy
{
const size_t socks_buffer_size = 8192;
const size_t max_socks_hostname_size = 255; // Limit for socks5 and bad idea to traverse
struct SOCKSDnsAddress {
uint8_t size;
char value[max_socks_hostname_size];
void FromString (std::string str) {
size = str.length();
if (str.length() > max_socks_hostname_size) size = max_socks_hostname_size;
memcpy(value,str.c_str(),size);
}
std::string ToString() { return std::string(value, size); }
void push_back (char c) { value[size++] = c; }
};
class SOCKSServer;
class SOCKSHandler: public std::enable_shared_from_this<SOCKSHandler> {
private:
enum state {
GET_SOCKSV,
GET_COMMAND,
GET_PORT,
GET_IPV4,
GET4_IDENT,
GET4A_HOST,
GET5_AUTHNUM,
GET5_AUTH,
GET5_REQUESTV,
GET5_GETRSV,
GET5_GETADDRTYPE,
GET5_IPV6,
GET5_HOST_SIZE,
GET5_HOST,
DONE
};
enum authMethods {
AUTH_NONE = 0, //No authentication, skip to next step
AUTH_GSSAPI = 1, //GSSAPI authentication
AUTH_USERPASSWD = 2, //Username and password
AUTH_UNACCEPTABLE = 0xff //No acceptable method found
};
enum addrTypes {
ADDR_IPV4 = 1, //IPv4 address (4 octets)
ADDR_DNS = 3, // DNS name (up to 255 octets)
ADDR_IPV6 = 4 //IPV6 address (16 octets)
};
enum errTypes {
SOCKS5_OK = 0, // No error for SOCKS5
SOCKS5_GEN_FAIL = 1, // General server failure
SOCKS5_RULE_DENIED = 2, // Connection disallowed by ruleset
SOCKS5_NET_UNREACH = 3, // Network unreachable
SOCKS5_HOST_UNREACH = 4, // Host unreachable
SOCKS5_CONN_REFUSED = 5, // Connection refused by the peer
SOCKS5_TTL_EXPIRED = 6, // TTL Expired
SOCKS5_CMD_UNSUP = 7, // Command unsuported
SOCKS5_ADDR_UNSUP = 8, // Address type unsuported
SOCKS4_OK = 90, // No error for SOCKS4
SOCKS4_FAIL = 91, // Failed establishing connecting or not allowed
SOCKS4_IDENTD_MISSING = 92, // Couldn't connect to the identd server
SOCKS4_IDENTD_DIFFER = 93 // The ID reported by the application and by identd differ
};
enum cmdTypes {
CMD_CONNECT = 1, // TCP Connect
CMD_BIND = 2, // TCP Bind
CMD_UDP = 3 // UDP associate
};
enum socksVersions {
SOCKS4 = 4, // SOCKS4
SOCKS5 = 5 // SOCKS5
};
union address {
uint32_t ip;
SOCKSDnsAddress dns;
uint8_t ipv6[16];
};
void EnterState(state nstate, uint8_t parseleft = 1);
bool HandleData(uint8_t *sock_buff, std::size_t len);
bool ValidateSOCKSRequest();
void HandleSockRecv(const boost::system::error_code & ecode, std::size_t bytes_transfered);
void Done();
void Terminate();
void AsyncSockRead();
boost::asio::const_buffers_1 GenerateSOCKS5SelectAuth(authMethods method);
boost::asio::const_buffers_1 GenerateSOCKS4Response(errTypes error, uint32_t ip, uint16_t port);
boost::asio::const_buffers_1 GenerateSOCKS5Response(errTypes error, addrTypes type, const address &addr, uint16_t port);
bool Socks5ChooseAuth();
void SocksRequestFailed(errTypes error);
void SocksRequestSuccess();
void SentSocksFailed(const boost::system::error_code & ecode);
void SentSocksDone(const boost::system::error_code & ecode);
void SentSocksResponse(const boost::system::error_code & ecode);
void HandleStreamRequestComplete (std::shared_ptr<i2p::stream::Stream> stream);
uint8_t m_sock_buff[socks_buffer_size];
SOCKSServer * m_parent;
boost::asio::ip::tcp::socket * m_sock;
std::shared_ptr<i2p::stream::Stream> m_stream;
uint8_t *m_remaining_data; //Data left to be sent
uint8_t m_response[7+max_socks_hostname_size];
address m_address; //Address
std::size_t m_remaining_data_len; //Size of the data left to be sent
uint32_t m_4aip; //Used in 4a requests
uint16_t m_port;
uint8_t m_command;
uint8_t m_parseleft; //Octets left to parse
authMethods m_authchosen; //Authentication chosen
addrTypes m_addrtype; //Address type chosen
socksVersions m_socksv; //Socks version
cmdTypes m_cmd; // Command requested
state m_state;
std::atomic<bool> dead; //To avoid cleaning up multiple times
public:
SOCKSHandler(SOCKSServer * parent, boost::asio::ip::tcp::socket * sock) :
m_parent(parent), m_sock(sock), m_stream(nullptr),
m_authchosen(AUTH_UNACCEPTABLE), m_addrtype(ADDR_IPV4), dead(false)
{ m_address.ip = 0; EnterState(GET_SOCKSV); AsyncSockRead(); }
~SOCKSHandler() { Terminate(); }
};
class SOCKSServer: public i2p::client::I2PTunnel
class SOCKSHandler;
class SOCKSServer: public i2p::client::I2PService
{
private:
std::set<std::shared_ptr<SOCKSHandler> > m_Handlers;
@ -151,16 +26,13 @@ namespace proxy
void HandleAccept(const boost::system::error_code& ecode, boost::asio::ip::tcp::socket * socket);
public:
SOCKSServer(int port) : I2PTunnel(nullptr),
SOCKSServer(int port) : I2PService(nullptr),
m_Acceptor (GetService (), boost::asio::ip::tcp::endpoint (boost::asio::ip::tcp::v4(), port)),
m_Timer (GetService ()) {};
~SOCKSServer() { Stop(); }
void Start ();
void Stop ();
void AddHandler (std::shared_ptr<SOCKSHandler> handler);
void RemoveHandler (std::shared_ptr<SOCKSHandler> handler);
void ClearHandlers ();
};
typedef SOCKSServer SOCKSProxy;

1
build/CMakeLists.txt
Unescape Escape View File

@ -48,6 +48,7 @@ set (DAEMON_SRC
"${CMAKE_SOURCE_DIR}/Daemon.cpp"
"${CMAKE_SOURCE_DIR}/HTTPProxy.cpp"
"${CMAKE_SOURCE_DIR}/HTTPServer.cpp"
"${CMAKE_SOURCE_DIR}/I2PService.cpp"
"${CMAKE_SOURCE_DIR}/I2PTunnel.cpp"
"${CMAKE_SOURCE_DIR}/SAM.cpp"
"${CMAKE_SOURCE_DIR}/SOCKS.cpp"

4
build/autotools/Makefile.am
Unescape Escape View File

@ -8,7 +8,7 @@ i2p_SOURCES = AddressBook.cpp CryptoConst.cpp Daemon.cpp \
SSUData.cpp Streaming.cpp TransitTunnel.cpp \
Transports.cpp Tunnel.cpp TunnelEndpoint.cpp \
TunnelGateway.cpp TunnelPool.cpp UPnP.cpp aes.cpp \
base64.cpp i2p.cpp util.cpp \
base64.cpp i2p.cpp util.cpp I2PService.cpp \
\
AddressBook.h CryptoConst.h Daemon.h ElGamal.h \
Garlic.h HTTPProxy.h HTTPServer.h I2NPProtocol.h \
@ -19,7 +19,7 @@ i2p_SOURCES = AddressBook.cpp CryptoConst.cpp Daemon.cpp \
TransitTunnel.h Transports.h Tunnel.h TunnelBase.h \
TunnelConfig.h TunnelEndpoint.h TunnelGateway.h \
TunnelPool.h UPnP.h aes.h base64.h config.h hmac.h \
util.h version.h
util.h version.h I2PService.h
AM_LDFLAGS = @BOOST_DATE_TIME_LIB@ @BOOST_FILESYSTEM_LIB@ \
@BOOST_PROGRAM_OPTIONS_LIB@ @BOOST_REGEX_LIB@ \

4
filelist.mk
Unescape Escape View File

@ -10,14 +10,14 @@ ifeq ($(UNAME),Darwin)
# This is needed on OS X for some reason I don't understand (yet).
# Else will get linker error about unknown symbols. - torkel
COMMON_SRC += \
BOB.cpp ClientContext.cpp Daemon.cpp I2PTunnel.cpp SAM.cpp SOCKS.cpp \
BOB.cpp ClientContext.cpp Daemon.cpp I2PTunnel.cpp I2PService.cpp SAM.cpp SOCKS.cpp \
UPnP.cpp HTTPServer.cpp HTTPProxy.cpp i2p.cpp DaemonLinux.cpp
endif
# also: Daemon{Linux,Win32}.cpp will be added later
DAEMON_SRC = $(COMMON_SRC) \
BOB.cpp ClientContext.cpp Daemon.cpp I2PTunnel.cpp SAM.cpp SOCKS.cpp UPnP.cpp \
BOB.cpp ClientContext.cpp Daemon.cpp I2PTunnel.cpp I2PService.cpp SAM.cpp SOCKS.cpp UPnP.cpp \
HTTPServer.cpp HTTPProxy.cpp i2p.cpp
LIB_SRC := $(COMMON_SRC) \

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