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i2pd
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add http proxy, change socks4a to socks5

pull/881/head
Jeff Becker 7 years ago
parent
24eec76428
commit
e336cbfb2d
3 changed files with 216 additions and 72 deletions
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  1. 228
      libi2pd/NTCPSession.cpp
  2. 34
      libi2pd/NTCPSession.h
  3. 26
      libi2pd/Transports.cpp

228
libi2pd/NTCPSession.cpp
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@ -12,6 +12,7 @@
#include "Transports.h" #include "Transports.h"
#include "NetDb.hpp" #include "NetDb.hpp"
#include "NTCPSession.h" #include "NTCPSession.h"
#include "HTTP.h"
#ifdef WITH_EVENTS #ifdef WITH_EVENTS
#include "Event.h" #include "Event.h"
#endif #endif
@ -789,7 +790,7 @@ namespace transport
NTCPServer::NTCPServer (): NTCPServer::NTCPServer ():
m_IsRunning (false), m_Thread (nullptr), m_Work (m_Service), m_IsRunning (false), m_Thread (nullptr), m_Work (m_Service),
m_TerminationTimer (m_Service), m_NTCPAcceptor (nullptr), m_NTCPV6Acceptor (nullptr), m_TerminationTimer (m_Service), m_NTCPAcceptor (nullptr), m_NTCPV6Acceptor (nullptr),
m_UseSocks(false), m_Resolver(m_Service), m_SocksEndpoint(nullptr) m_ProxyType(eNoProxy), m_Resolver(m_Service), m_ProxyEndpoint(nullptr)
{ {
} }
@ -804,11 +805,11 @@ namespace transport
{ {
m_IsRunning = true; m_IsRunning = true;
m_Thread = new std::thread (std::bind (&NTCPServer::Run, this)); m_Thread = new std::thread (std::bind (&NTCPServer::Run, this));
// we are using a socks proxy, don't create any acceptors // we are using a proxy, don't create any acceptors
if(m_UseSocks) if(UsingProxy())
{ {
// TODO: resolve socks proxy until it is resolved // TODO: resolve proxy until it is resolved
boost::asio::ip::tcp::resolver::query q(m_SocksAddress, std::to_string(m_SocksPort)); boost::asio::ip::tcp::resolver::query q(m_ProxyAddress, std::to_string(m_ProxyPort));
boost::system::error_code e; boost::system::error_code e;
auto itr = m_Resolver.resolve(q, e); auto itr = m_Resolver.resolve(q, e);
if(e) if(e)
@ -817,7 +818,7 @@ namespace transport
} }
else else
{ {
m_SocksEndpoint = new boost::asio::ip::tcp::endpoint(*itr); m_ProxyEndpoint = new boost::asio::ip::tcp::endpoint(*itr);
} }
} }
else else
@ -902,10 +903,10 @@ namespace transport
delete m_Thread; delete m_Thread;
m_Thread = nullptr; m_Thread = nullptr;
} }
if(m_SocksEndpoint) if(m_ProxyEndpoint)
{ {
delete m_SocksEndpoint; delete m_ProxyEndpoint;
m_SocksEndpoint = nullptr; m_ProxyEndpoint = nullptr;
} }
} }
} }
@ -1031,13 +1032,12 @@ namespace transport
}); });
} }
void NTCPServer::ConnectSocks (const std::string& host, uint16_t port, std::shared_ptr<NTCPSession> conn) void NTCPServer::ConnectWithProxy (const std::string& host, uint16_t port, RemoteAddressType addrtype, std::shared_ptr<NTCPSession> conn)
{ {
if(m_SocksEndpoint == nullptr) if(m_ProxyEndpoint == nullptr)
{ {
return; return;
} }
LogPrint (eLogDebug, "NTCP: Connecting to ", host ,":", port, " Via socks proxy");
m_Service.post([=]() { m_Service.post([=]() {
if (this->AddNTCPSession (conn)) if (this->AddNTCPSession (conn))
{ {
@ -1054,7 +1054,7 @@ namespace transport
conn->Terminate (); conn->Terminate ();
} }
}); });
conn->GetSocket ().async_connect (*m_SocksEndpoint, std::bind (&NTCPServer::HandleSocksConnect, this, std::placeholders::_1, conn, timer, host, port)); conn->GetSocket ().async_connect (*m_ProxyEndpoint, std::bind (&NTCPServer::HandleProxyConnect, this, std::placeholders::_1, conn, timer, host, port, addrtype));
} }
}); });
} }
@ -1078,46 +1078,161 @@ namespace transport
} }
} }
void NTCPServer::UseSocksProxy(const std::string & addr, uint16_t port) void NTCPServer::UseProxy(ProxyType proxytype, const std::string & addr, uint16_t port)
{ {
m_UseSocks = true; m_ProxyType = proxytype;
m_SocksAddress = addr; m_ProxyAddress = addr;
m_SocksPort = port; m_ProxyPort = port;
} }
void NTCPServer::HandleSocksConnect(const boost::system::error_code& ecode, std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer, const std::string & host, uint16_t port) void NTCPServer::HandleProxyConnect(const boost::system::error_code& ecode, std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer, const std::string & host, uint16_t port, RemoteAddressType addrtype)
{ {
if(ecode) if(ecode)
{ {
LogPrint(eLogInfo, "NTCP: Socks Proxy connect error ", ecode.message()); LogPrint(eLogWarning, "NTCP: failed to connect to proxy ", ecode.message());
timer->cancel();
conn->Terminate();
return; return;
} }
LogPrint(eLogDebug, "NTCP: connecting via socks proxy to ",host, ":", port); if(m_ProxyType == eSocksProxy)
uint8_t readbuff[8];
// build socks4a request
size_t addrsz = host.size();
size_t sz = 8 + 1 + 4 + addrsz + 1;
uint8_t buff[256];
if(sz > 256)
{ {
// hostname too big // TODO: support username/password auth etc
return; uint8_t buff[3] = {0x05, 0x01, 0x00};
boost::asio::async_write(conn->GetSocket(), boost::asio::buffer(buff, 3), boost::asio::transfer_all(), [=] (const boost::system::error_code & ec, std::size_t transferred) {
(void) transferred;
if(ec)
{
LogPrint(eLogWarning, "NTCP: socks5 write error ", ec.message());
}
});
uint8_t readbuff[2];
boost::asio::async_read(conn->GetSocket(), boost::asio::buffer(readbuff, 2), [=](const boost::system::error_code & ec, std::size_t transferred) {
if(ec)
{
LogPrint(eLogError, "NTCP: socks5 read error ", ec.message());
timer->cancel();
conn->Terminate();
return;
}
else if(transferred == 2)
{
if(readbuff[1] == 0x00)
{
AfterSocksHandshake(conn, timer, host, port, addrtype);
return;
}
else if (readbuff[1] == 0xff)
{
LogPrint(eLogError, "NTCP: socks5 proxy rejected authentication");
timer->cancel();
conn->Terminate();
return;
}
}
LogPrint(eLogError, "NTCP: socks5 server gave invalid response");
timer->cancel();
conn->Terminate();
});
} }
buff[0] = 4; else if(m_ProxyType == eHTTPProxy)
buff[1] = 1; {
htobe16buf(buff+2, port); i2p::http::HTTPReq req;
buff[4] = 0; req.method = "CONNECT";
buff[5] = 0; req.version ="HTTP/1.1";
buff[6] = 0; if(addrtype == eIP6Address)
buff[7] = 1; req.uri = "[" + host + "]:" + std::to_string(port);
buff[8] = 105; // i else
buff[9] = 50; // 2 req.uri = host + ":" + std::to_string(port);
buff[10] = 112; // p
buff[11] = 100; // d
buff[12] = 0;
memcpy(buff+12, host.c_str(), addrsz);
buff[12+addrsz] = 0;
boost::asio::streambuf writebuff;
std::ostream out(&writebuff);
out << req.to_string();
boost::asio::async_write(conn->GetSocket(), writebuff, boost::asio::transfer_all(), [=](const boost::system::error_code & ec, std::size_t transferred) {
(void) transferred;
if(ec)
LogPrint(eLogError, "NTCP: http proxy write error ", ec.message());
});
boost::asio::streambuf readbuff;
boost::asio::async_read_until(conn->GetSocket(), readbuff, "\r\n\r\n", [=, &readbuff] (const boost::system::error_code & ec, std::size_t transferred) {
(void) transferred;
if(ec)
{
LogPrint(eLogError, "NTCP: http proxy read error ", ec.message());
timer->cancel();
conn->Terminate();
}
else
{
readbuff.commit(transferred);
i2p::http::HTTPRes res;
if(res.parse(boost::asio::buffer_cast<const char*>(readbuff.data()), readbuff.size()) > 0)
{
if(res.code == 200)
{
timer->cancel();
conn->ClientLogin();
return;
}
else
{
LogPrint(eLogError, "NTCP: http proxy rejected request ", res.code);
}
}
else
LogPrint(eLogError, "NTCP: http proxy gave malformed response");
timer->cancel();
conn->Terminate();
}
});
}
else
LogPrint(eLogError, "NTCP: unknown proxy type, invalid state");
}
void NTCPServer::AfterSocksHandshake(std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer, const std::string & host, uint16_t port, RemoteAddressType addrtype)
{
// build request
size_t sz = 0;
uint8_t buff[256];
uint8_t readbuff[256];
buff[0] = 0x05;
buff[1] = 0x01;
buff[2] = 0x00;
if(addrtype == eIP4Address)
{
buff[3] = 0x01;
auto addr = boost::asio::ip::address::from_string(host).to_v4();
auto addrbytes = addr.to_bytes();
auto addrsize = addrbytes.size();
memcpy(buff+4, addrbytes.data(), addrsize);
}
else if (addrtype == eIP6Address)
{
buff[3] = 0x04;
auto addr = boost::asio::ip::address::from_string(host).to_v6();
auto addrbytes = addr.to_bytes();
auto addrsize = addrbytes.size();
memcpy(buff+4, addrbytes.data(), addrsize);
}
else if (addrtype == eHostname)
{
buff[3] = 0x03;
size_t addrsize = host.size();
sz = addrsize + 1 + 4;
if (2 + sz > sizeof(buff))
{
// too big
return;
}
buff[4] = (uint8_t) addrsize;
memcpy(buff+4, host.c_str(), addrsize);
}
htobe16buf(buff+sz, port);
sz += 2;
boost::asio::async_write(conn->GetSocket(), boost::asio::buffer(buff, sz), boost::asio::transfer_all(), [=](const boost::system::error_code & ec, std::size_t written) { boost::asio::async_write(conn->GetSocket(), boost::asio::buffer(buff, sz), boost::asio::transfer_all(), [=](const boost::system::error_code & ec, std::size_t written) {
if(ec) if(ec)
{ {
@ -1126,21 +1241,24 @@ namespace transport
} }
}); });
boost::asio::async_read(conn->GetSocket(), boost::asio::buffer(readbuff, 8), [=](const boost::system::error_code & e, std::size_t transferred) { boost::asio::async_read(conn->GetSocket(), boost::asio::buffer(readbuff, sz), [=](const boost::system::error_code & e, std::size_t transferred) {
if(transferred == 8) if(e)
{
LogPrint(eLogError, "NTCP: socks proxy read error ", e.message());
}
else if(transferred == sz)
{
if( readbuff[1] == 0x00)
{ {
if( readbuff[1] == 0x5a) timer->cancel();
{ conn->ClientLogin();
timer->cancel(); return;
conn->ClientLogin(); }
}
else
{
timer->cancel();
conn->Terminate();
i2p::data::netdb.SetUnreachable (conn->GetRemoteIdentity ()->GetIdentHash (), true);
}
} }
if(!e)
i2p::data::netdb.SetUnreachable (conn->GetRemoteIdentity ()->GetIdentHash (), true);
timer->cancel();
conn->Terminate();
}); });
} }

34
libi2pd/NTCPSession.h
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@ -131,6 +131,21 @@ namespace transport
{ {
public: public:
enum RemoteAddressType
{
eIP4Address,
eIP6Address,
eHostname
};
enum ProxyType
{
eNoProxy,
eSocksProxy,
eHTTPProxy
};
NTCPServer (); NTCPServer ();
~NTCPServer (); ~NTCPServer ();
@ -140,15 +155,15 @@ namespace transport
bool AddNTCPSession (std::shared_ptr<NTCPSession> session); bool AddNTCPSession (std::shared_ptr<NTCPSession> session);
void RemoveNTCPSession (std::shared_ptr<NTCPSession> session); void RemoveNTCPSession (std::shared_ptr<NTCPSession> session);
std::shared_ptr<NTCPSession> FindNTCPSession (const i2p::data::IdentHash& ident); std::shared_ptr<NTCPSession> FindNTCPSession (const i2p::data::IdentHash& ident);
void ConnectSocks (const std::string& addr, uint16_t port, std::shared_ptr<NTCPSession> conn); void ConnectWithProxy (const std::string& addr, uint16_t port, RemoteAddressType addrtype, std::shared_ptr<NTCPSession> conn);
void Connect(const boost::asio::ip::address & address, uint16_t port, std::shared_ptr<NTCPSession> conn); void Connect(const boost::asio::ip::address & address, uint16_t port, std::shared_ptr<NTCPSession> conn);
bool IsBoundV4() const { return m_NTCPAcceptor != nullptr; }; bool IsBoundV4() const { return m_NTCPAcceptor != nullptr; };
bool IsBoundV6() const { return m_NTCPV6Acceptor != nullptr; }; bool IsBoundV6() const { return m_NTCPV6Acceptor != nullptr; };
bool NetworkIsReady() const { return IsBoundV4() || IsBoundV6() || m_UseSocks; }; bool NetworkIsReady() const { return IsBoundV4() || IsBoundV6() || UsingProxy(); };
bool UsingSocksProxy() const { return m_UseSocks; }; bool UsingProxy() const { return m_ProxyType != eNoProxy; };
void UseSocksProxy(const std::string & address, uint16_t port); void UseProxy(ProxyType proxy, const std::string & address, uint16_t port);
boost::asio::io_service& GetService () { return m_Service; }; boost::asio::io_service& GetService () { return m_Service; };
@ -160,7 +175,8 @@ namespace transport
void HandleConnect (const boost::system::error_code& ecode, std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer); void HandleConnect (const boost::system::error_code& ecode, std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer);
void HandleSocksConnect(const boost::system::error_code& ecode, std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer, const std::string & host, uint16_t port); void HandleProxyConnect(const boost::system::error_code& ecode, std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer, const std::string & host, uint16_t port, RemoteAddressType adddrtype);
void AfterSocksHandshake(std::shared_ptr<NTCPSession> conn, std::shared_ptr<boost::asio::deadline_timer> timer, const std::string & host, uint16_t port, RemoteAddressType adddrtype);
// timer // timer
void ScheduleTermination (); void ScheduleTermination ();
@ -177,11 +193,11 @@ namespace transport
std::map<i2p::data::IdentHash, std::shared_ptr<NTCPSession> > m_NTCPSessions; // access from m_Thread only std::map<i2p::data::IdentHash, std::shared_ptr<NTCPSession> > m_NTCPSessions; // access from m_Thread only
std::list<std::shared_ptr<NTCPSession> > m_PendingIncomingSessions; std::list<std::shared_ptr<NTCPSession> > m_PendingIncomingSessions;
bool m_UseSocks; ProxyType m_ProxyType;
std::string m_SocksAddress; std::string m_ProxyAddress;
uint16_t m_SocksPort; uint16_t m_ProxyPort;
boost::asio::ip::tcp::resolver m_Resolver; boost::asio::ip::tcp::resolver m_Resolver;
boost::asio::ip::tcp::endpoint * m_SocksEndpoint; boost::asio::ip::tcp::endpoint * m_ProxyEndpoint;
public: public:
// for HTTP/I2PControl // for HTTP/I2PControl

26
libi2pd/Transports.cpp
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@ -151,14 +151,20 @@ namespace transport
{ {
if(proxyurl.parse(ntcpproxy)) if(proxyurl.parse(ntcpproxy))
{ {
if(proxyurl.schema == "socks") if(proxyurl.schema == "socks" || proxyurl.schema == "http")
{ {
m_NTCPServer = new NTCPServer(); m_NTCPServer = new NTCPServer();
m_NTCPServer->UseSocksProxy(proxyurl.host, proxyurl.port) ;
NTCPServer::ProxyType proxytype = NTCPServer::eSocksProxy;
if (proxyurl.schema == "http")
proxytype = NTCPServer::eHTTPProxy;
m_NTCPServer->UseProxy(proxytype, proxyurl.host, proxyurl.port) ;
m_NTCPServer->Start(); m_NTCPServer->Start();
if(!m_NTCPServer->NetworkIsReady()) if(!m_NTCPServer->NetworkIsReady())
{ {
LogPrint(eLogError, "Transports: NTCP failed to start with socks proxy"); LogPrint(eLogError, "Transports: NTCP failed to start with proxy");
m_NTCPServer->Stop(); m_NTCPServer->Stop();
delete m_NTCPServer; delete m_NTCPServer;
m_NTCPServer = nullptr; m_NTCPServer = nullptr;
@ -169,7 +175,6 @@ namespace transport
} }
else else
LogPrint(eLogError, "Transports: invalid NTCP proxy url ", ntcpproxy); LogPrint(eLogError, "Transports: invalid NTCP proxy url ", ntcpproxy);
return; return;
} }
@ -379,10 +384,15 @@ namespace transport
if (!peer.router->UsesIntroducer () && !peer.router->IsUnreachable ()) if (!peer.router->UsesIntroducer () && !peer.router->IsUnreachable ())
{ {
auto s = std::make_shared<NTCPSession> (*m_NTCPServer, peer.router); auto s = std::make_shared<NTCPSession> (*m_NTCPServer, peer.router);
if(m_NTCPServer->UsingSocksProxy()) if(m_NTCPServer->UsingProxy())
{ {
NTCPServer::RemoteAddressType remote = NTCPServer::eIP4Address;
std::string addr = address->host.to_string(); std::string addr = address->host.to_string();
m_NTCPServer->ConnectSocks(addr, address->port, s);
if(address->host.is_v6())
remote = NTCPServer::eIP6Address;
m_NTCPServer->ConnectWithProxy(addr, address->port, remote, s);
} }
else else
m_NTCPServer->Connect (address->host, address->port, s); m_NTCPServer->Connect (address->host, address->port, s);
@ -393,10 +403,10 @@ namespace transport
{ {
if (address->addressString.length () > 0) // trying to resolve if (address->addressString.length () > 0) // trying to resolve
{ {
if(m_NTCPServer->UsingSocksProxy()) if(m_NTCPServer->UsingProxy())
{ {
auto s = std::make_shared<NTCPSession> (*m_NTCPServer, peer.router); auto s = std::make_shared<NTCPSession> (*m_NTCPServer, peer.router);
m_NTCPServer->ConnectSocks(address->addressString, address->port, s); m_NTCPServer->ConnectWithProxy(address->addressString, address->port, NTCPServer::eHostname, s);
} }
else else
{ {

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