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server/dep/src/sockets/TcpSocket.cpp

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/** \file TcpSocket.cpp
** \date 2004-02-13
** \author grymse@alhem.net
**/
/*
Copyright (C) 2004-2007 Anders Hedstrom
This library is made available under the terms of the GNU GPL.
If you would like to use this library in a closed-source application,
a separate license agreement is available. For information about
the closed-source license agreement for the C++ sockets library,
please visit http://www.alhem.net/Sockets/license.html and/or
email license@alhem.net.
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef _WIN32
#ifdef _MSC_VER
#pragma warning(disable:4786)
#endif
#include <stdlib.h>
#else
#include <errno.h>
#endif
#include "ISocketHandler.h"
#include <fcntl.h>
#include <assert.h>
#include <stdarg.h>
#ifdef HAVE_OPENSSL
#include <openssl/rand.h>
#include <openssl/err.h>
#endif
#include <map>
#include "TcpSocket.h"
#include "Utility.h"
#include "Ipv4Address.h"
#include "Ipv6Address.h"
#include "Mutex.h"
#include "IFile.h"
#ifdef SOCKETS_NAMESPACE
namespace SOCKETS_NAMESPACE {
#endif
//#ifdef _DEBUG
//#define DEB(x) x
//#else
#define DEB(x)
//#endif
// statics
#ifdef HAVE_OPENSSL
SSLInitializer TcpSocket::m_ssl_init;
#endif
// thanks, q
#ifdef _MSC_VER
#pragma warning(disable:4355)
#endif
TcpSocket::TcpSocket(ISocketHandler& h) : StreamSocket(h)
,ibuf(TCP_BUFSIZE_READ)
,m_b_input_buffer_disabled(false)
,m_bytes_sent(0)
,m_bytes_received(0)
,m_skip_c(false)
#ifdef SOCKETS_DYNAMIC_TEMP
,m_buf(new char[TCP_BUFSIZE_READ + 1])
#endif
,m_obuf_top(NULL)
,m_transfer_limit(0)
,m_output_length(0)
#ifdef HAVE_OPENSSL
,m_ssl_ctx(NULL)
,m_ssl(NULL)
,m_sbio(NULL)
#endif
#ifdef ENABLE_SOCKS4
,m_socks4_state(0)
#endif
#ifdef ENABLE_RESOLVER
,m_resolver_id(0)
#endif
#ifdef ENABLE_RECONNECT
,m_b_reconnect(false)
,m_b_is_reconnect(false)
#endif
{
}
#ifdef _MSC_VER
#pragma warning(default:4355)
#endif
#ifdef _MSC_VER
#pragma warning(disable:4355)
#endif
TcpSocket::TcpSocket(ISocketHandler& h,size_t isize,size_t osize) : StreamSocket(h)
,ibuf(isize)
,m_b_input_buffer_disabled(false)
,m_bytes_sent(0)
,m_bytes_received(0)
,m_skip_c(false)
#ifdef SOCKETS_DYNAMIC_TEMP
,m_buf(new char[TCP_BUFSIZE_READ + 1])
#endif
,m_obuf_top(NULL)
,m_transfer_limit(0)
,m_output_length(0)
#ifdef HAVE_OPENSSL
,m_ssl_ctx(NULL)
,m_ssl(NULL)
,m_sbio(NULL)
#endif
#ifdef ENABLE_SOCKS4
,m_socks4_state(0)
#endif
#ifdef ENABLE_RESOLVER
,m_resolver_id(0)
#endif
#ifdef ENABLE_RECONNECT
,m_b_reconnect(false)
,m_b_is_reconnect(false)
#endif
{
}
#ifdef _MSC_VER
#pragma warning(default:4355)
#endif
TcpSocket::~TcpSocket()
{
#ifdef SOCKETS_DYNAMIC_TEMP
delete[] m_buf;
#endif
// %! empty m_obuf
while (m_obuf.size())
{
output_l::iterator it = m_obuf.begin();
OUTPUT *p = *it;
delete p;
m_obuf.erase(it);
}
#ifdef HAVE_OPENSSL
if (m_ssl)
{
SSL_free(m_ssl);
}
#endif
}
bool TcpSocket::Open(ipaddr_t ip,port_t port,bool skip_socks)
{
Ipv4Address ad(ip, port);
Ipv4Address local;
return Open(ad, local, skip_socks);
}
#ifdef ENABLE_IPV6
#ifdef IPPROTO_IPV6
bool TcpSocket::Open(in6_addr ip,port_t port,bool skip_socks)
{
Ipv6Address ad(ip, port);
return Open(ad, skip_socks);
}
#endif
#endif
bool TcpSocket::Open(SocketAddress& ad,bool skip_socks)
{
Ipv4Address bind_ad("0.0.0.0", 0);
return Open(ad, bind_ad, skip_socks);
}
bool TcpSocket::Open(SocketAddress& ad,SocketAddress& bind_ad,bool skip_socks)
{
if (!ad.IsValid())
{
Handler().LogError(this, "Open", 0, "Invalid SocketAddress", LOG_LEVEL_FATAL);
SetCloseAndDelete();
return false;
}
if (Handler().GetCount() >= FD_SETSIZE)
{
Handler().LogError(this, "Open", 0, "no space left in fd_set", LOG_LEVEL_FATAL);
SetCloseAndDelete();
return false;
}
SetConnecting(false);
#ifdef ENABLE_SOCKS4
SetSocks4(false);
#endif
// check for pooling
#ifdef ENABLE_POOL
if (Handler().PoolEnabled())
{
ISocketHandler::PoolSocket *pools = Handler().FindConnection(SOCK_STREAM, "tcp", ad);
if (pools)
{
CopyConnection( pools );
delete pools;
SetIsClient();
SetCallOnConnect(); // ISocketHandler must call OnConnect
Handler().LogError(this, "SetCallOnConnect", 0, "Found pooled connection", LOG_LEVEL_INFO);
return true;
}
}
#endif
// if not, create new connection
SOCKET s = CreateSocket(ad.GetFamily(), SOCK_STREAM, "tcp");
if (s == INVALID_SOCKET)
{
return false;
}
// socket must be nonblocking for async connect
if (!SetNonblocking(true, s))
{
SetCloseAndDelete();
closesocket(s);
return false;
}
#ifdef ENABLE_POOL
SetIsClient(); // client because we connect
#endif
SetClientRemoteAddress(ad);
int n = 0;
if (bind_ad.GetPort() != 0)
{
bind(s, bind_ad, bind_ad);
}
#ifdef ENABLE_SOCKS4
if (!skip_socks && GetSocks4Host() && GetSocks4Port())
{
Ipv4Address sa(GetSocks4Host(), GetSocks4Port());
{
std::string sockshost;
Utility::l2ip(GetSocks4Host(), sockshost);
Handler().LogError(this, "Open", 0, "Connecting to socks4 server @ " + sockshost + ":" +
Utility::l2string(GetSocks4Port()), LOG_LEVEL_INFO);
}
SetSocks4();
n = connect(s, sa, sa);
SetRemoteAddress(sa);
}
else
#endif
{
n = connect(s, ad, ad);
SetRemoteAddress(ad);
}
if (n == -1)
{
// check error code that means a connect is in progress
#ifdef _WIN32
if (Errno == WSAEWOULDBLOCK)
#else
if (Errno == EINPROGRESS)
#endif
{
Attach(s);
SetConnecting( true ); // this flag will control fd_set's
}
else
#ifdef ENABLE_SOCKS4
if (Socks4() && Handler().Socks4TryDirect() ) // retry
{
closesocket(s);
return Open(ad, true);
}
else
#endif
#ifdef ENABLE_RECONNECT
if (Reconnect())
{
Handler().LogError(this, "connect: failed, reconnect pending", Errno, StrError(Errno), LOG_LEVEL_INFO);
Attach(s);
SetConnecting( true ); // this flag will control fd_set's
}
else
#endif
{
Handler().LogError(this, "connect: failed", Errno, StrError(Errno), LOG_LEVEL_FATAL);
SetCloseAndDelete();
closesocket(s);
return false;
}
}
else
{
Attach(s);
SetCallOnConnect(); // ISocketHandler must call OnConnect
}
// 'true' means connected or connecting(not yet connected)
// 'false' means something failed
return true; //!Connecting();
}
bool TcpSocket::Open(const std::string &host,port_t port)
{
#ifdef ENABLE_IPV6
#ifdef IPPROTO_IPV6
if (IsIpv6())
{
#ifdef ENABLE_RESOLVER
if (!Handler().ResolverEnabled() || Utility::isipv6(host) )
{
#endif
in6_addr a;
if (!Utility::u2ip(host, a))
{
SetCloseAndDelete();
return false;
}
Ipv6Address ad(a, port);
Ipv6Address local;
return Open(ad, local);
#ifdef ENABLE_RESOLVER
}
m_resolver_id = Resolve6(host, port);
return true;
#endif
}
#endif
#endif
#ifdef ENABLE_RESOLVER
if (!Handler().ResolverEnabled() || Utility::isipv4(host) )
{
#endif
ipaddr_t l;
if (!Utility::u2ip(host,l))
{
SetCloseAndDelete();
return false;
}
Ipv4Address ad(l, port);
Ipv4Address local;
return Open(ad, local);
#ifdef ENABLE_RESOLVER
}
// resolve using async resolver thread
m_resolver_id = Resolve(host, port);
return true;
#endif
}
#ifdef ENABLE_RESOLVER
void TcpSocket::OnResolved(int id,ipaddr_t a,port_t port)
{
DEB( fprintf(stderr, "TcpSocket::OnResolved id %d addr %x port %d\n", id, a, port);)
if (id == m_resolver_id)
{
if (a && port)
{
Ipv4Address ad(a, port);
Ipv4Address local;
if (Open(ad, local))
{
if (!Handler().Valid(this))
{
Handler().Add(this);
}
}
}
else
{
Handler().LogError(this, "OnResolved", 0, "Resolver failed", LOG_LEVEL_FATAL);
SetCloseAndDelete();
}
}
else
{
Handler().LogError(this, "OnResolved", id, "Resolver returned wrong job id", LOG_LEVEL_FATAL);
SetCloseAndDelete();
}
}
#ifdef ENABLE_IPV6
void TcpSocket::OnResolved(int id,in6_addr& a,port_t port)
{
if (id == m_resolver_id)
{
Ipv6Address ad(a, port);
if (ad.IsValid())
{
Ipv6Address local;
if (Open(ad, local))
{
if (!Handler().Valid(this))
{
Handler().Add(this);
}
}
}
}
else
{
Handler().LogError(this, "OnResolved", id, "Resolver returned wrong job id", LOG_LEVEL_FATAL);
SetCloseAndDelete();
}
}
#endif
#endif
void TcpSocket::OnRead()
{
int n = 0;
#ifdef SOCKETS_DYNAMIC_TEMP
char *buf = m_buf;
#else
char buf[TCP_BUFSIZE_READ];
#endif
#ifdef HAVE_OPENSSL
if (IsSSL())
{
if (!Ready())
return;
n = SSL_read(m_ssl, buf, TCP_BUFSIZE_READ);
if (n == -1)
{
n = SSL_get_error(m_ssl, n);
switch (n)
{
case SSL_ERROR_NONE:
case SSL_ERROR_WANT_READ:
case SSL_ERROR_WANT_WRITE:
break;
case SSL_ERROR_ZERO_RETURN:
DEB( fprintf(stderr, "SSL_read() returns zero - closing socket\n");)
OnDisconnect();
SetCloseAndDelete(true);
SetFlushBeforeClose(false);
SetLost();
break;
default:
DEB( fprintf(stderr, "SSL read problem, errcode = %d\n",n);)
OnDisconnect();
SetCloseAndDelete(true);
SetFlushBeforeClose(false);
SetLost();
}
return;
}
else
if (!n)
{
OnDisconnect();
SetCloseAndDelete(true);
SetFlushBeforeClose(false);
SetLost();
SetShutdown(SHUT_WR);
return;
}
else
if (n > 0 && n <= TCP_BUFSIZE_READ)
{
m_bytes_received += n;
if (GetTrafficMonitor())
{
GetTrafficMonitor() -> fwrite(buf, 1, n);
}
if (!m_b_input_buffer_disabled && !ibuf.Write(buf,n))
{
Handler().LogError(this, "OnRead(ssl)", 0, "ibuf overflow", LOG_LEVEL_WARNING);
}
}
else
{
Handler().LogError(this, "OnRead(ssl)", n, "abnormal value from SSL_read", LOG_LEVEL_ERROR);
}
}
else
#endif // HAVE_OPENSSL
{
n = recv(GetSocket(), buf, TCP_BUFSIZE_READ, MSG_NOSIGNAL);
if (n == -1)
{
Handler().LogError(this, "read", Errno, StrError(Errno), LOG_LEVEL_FATAL);
OnDisconnect();
SetCloseAndDelete(true);
SetFlushBeforeClose(false);
SetLost();
return;
}
else
if (!n)
{
OnDisconnect();
SetCloseAndDelete(true);
SetFlushBeforeClose(false);
SetLost();
SetShutdown(SHUT_WR);
return;
}
else
if (n > 0 && n <= TCP_BUFSIZE_READ)
{
m_bytes_received += n;
if (GetTrafficMonitor())
{
GetTrafficMonitor() -> fwrite(buf, 1, n);
}
if (!m_b_input_buffer_disabled && !ibuf.Write(buf,n))
{
Handler().LogError(this, "OnRead", 0, "ibuf overflow", LOG_LEVEL_WARNING);
}
}
else
{
Handler().LogError(this, "OnRead", n, "abnormal value from recv", LOG_LEVEL_ERROR);
}
}
//
OnRead( buf, n );
}
void TcpSocket::OnRead( char *buf, size_t n )
{
// unbuffered
if (n > 0 && n <= TCP_BUFSIZE_READ)
{
if (LineProtocol())
{
buf[n] = 0;
size_t i = 0;
if (m_skip_c && (buf[i] == 13 || buf[i] == 10) && buf[i] != m_c)
{
m_skip_c = false;
i++;
}
size_t x = i;
for (; i < n && LineProtocol(); i++)
{
while ((buf[i] == 13 || buf[i] == 10) && LineProtocol())
{
char c = buf[i];
buf[i] = 0;
if (buf[x])
{
m_line += (buf + x);
}
OnLine( m_line );
i++;
m_skip_c = true;
m_c = c;
if (i < n && (buf[i] == 13 || buf[i] == 10) && buf[i] != c)
{
m_skip_c = false;
i++;
}
x = i;
m_line = "";
}
if (!LineProtocol())
{
break;
}
}
if (!LineProtocol())
{
if (i < n)
{
OnRawData(buf + i, n - i);
}
}
else
if (buf[x])
{
m_line += (buf + x);
}
}
else
{
OnRawData(buf, n);
}
}
if (m_b_input_buffer_disabled)
{
return;
}
// further processing: socks4
#ifdef ENABLE_SOCKS4
if (Socks4())
{
bool need_more = false;
while (GetInputLength() && !need_more && !CloseAndDelete())
{
need_more = OnSocks4Read();
}
}
#endif
}
void TcpSocket::OnWriteComplete()
{
}
void TcpSocket::OnWrite()
{
if (Connecting())
{
int err = SoError();
// don't reset connecting flag on error here, we want the OnConnectFailed timeout later on
if (!err) // ok
{
Set(!IsDisableRead(), false);
SetConnecting(false);
SetCallOnConnect();
return;
}
Handler().LogError(this, "tcp: connect failed", err, StrError(err), LOG_LEVEL_FATAL);
Set(false, false); // no more monitoring because connection failed
// failed
#ifdef ENABLE_SOCKS4
if (Socks4())
{
// %! leave 'Connecting' flag set?
OnSocks4ConnectFailed();
return;
}
#endif
if (GetConnectionRetry() == -1 ||
(GetConnectionRetry() && GetConnectionRetries() < GetConnectionRetry()) )
{
// even though the connection failed at once, only retry after
// the connection timeout.
// should we even try to connect again, when CheckConnect returns
// false it's because of a connection error - not a timeout...
return;
}
SetConnecting(false);
SetCloseAndDelete( true );
/// \todo state reason why connect failed
OnConnectFailed();
return;
}
// try send next block in buffer
// if full block is sent, repeat
// if all blocks are sent, reset m_wfds
bool repeat = false;
size_t sz = m_transfer_limit ? GetOutputLength() : 0;
do
{
output_l::iterator it = m_obuf.begin();
OUTPUT *p = *it;
repeat = false;
int n = TryWrite(p -> Buf(), p -> Len());
if (n > 0)
{
size_t left = p -> Remove(n);
m_output_length -= n;
if (!left)
{
delete p;
m_obuf.erase(it);
if (!m_obuf.size())
{
m_obuf_top = NULL;
OnWriteComplete();
}
else
{
repeat = true;
}
}
}
} while (repeat);
if (m_transfer_limit && sz > m_transfer_limit && GetOutputLength() < m_transfer_limit)
{
OnTransferLimit();
}
// check output buffer set, set/reset m_wfds accordingly
{
bool br;
bool bw;
bool bx;
Handler().Get(GetSocket(), br, bw, bx);
if (m_obuf.size())
Set(br, true);
else
Set(br, false);
}
}
int TcpSocket::TryWrite(const char *buf, size_t len)
{
int n = 0;
#ifdef HAVE_OPENSSL
if (IsSSL())
{
n = SSL_write(m_ssl, buf, (int)len);
if (n == -1)
{
int errnr = SSL_get_error(m_ssl, n);
if ( errnr != SSL_ERROR_WANT_READ && errnr != SSL_ERROR_WANT_WRITE )
{
OnDisconnect();
SetCloseAndDelete(true);
SetFlushBeforeClose(false);
SetLost();
const char *errbuf = ERR_error_string(errnr, NULL);
Handler().LogError(this, "OnWrite/SSL_write", errnr, errbuf, LOG_LEVEL_FATAL);
}
return 0;
}
else
if (!n)
{
OnDisconnect();
SetCloseAndDelete(true);
SetFlushBeforeClose(false);
SetLost();
DEB( int errnr = SSL_get_error(m_ssl, n);
const char *errbuf = ERR_error_string(errnr, NULL);
fprintf(stderr, "SSL_write() returns 0: %d : %s\n",errnr, errbuf);)
}
}
else
#endif // HAVE_OPENSSL
{
n = send(GetSocket(), buf, (int)len, MSG_NOSIGNAL);
if (n == -1)
{
// normal error codes:
// WSAEWOULDBLOCK
// EAGAIN or EWOULDBLOCK
#ifdef _WIN32
if (Errno != WSAEWOULDBLOCK)
#else
if (Errno != EWOULDBLOCK)
#endif
{
Handler().LogError(this, "send", Errno, StrError(Errno), LOG_LEVEL_FATAL);
OnDisconnect();
SetCloseAndDelete(true);
SetFlushBeforeClose(false);
SetLost();
}
return 0;
}
}
if (n > 0)
{
m_bytes_sent += n;
if (GetTrafficMonitor())
{
GetTrafficMonitor() -> fwrite(buf, 1, n);
}
}
return n;
}
void TcpSocket::Buffer(const char *buf, size_t len)
{
size_t ptr = 0;
m_output_length += len;
while (ptr < len)
{
// buf/len => pbuf/sz
size_t space = 0;
if (m_obuf_top && (space = m_obuf_top -> Space()) > 0)
{
const char *pbuf = buf + ptr;
size_t sz = len - ptr;
if (space >= sz)
{
m_obuf_top -> Add(pbuf, sz);
ptr += sz;
}
else
{
m_obuf_top -> Add(pbuf, space);
ptr += space;
}
}
else
{
m_obuf_top = new OUTPUT;
m_obuf.push_back( m_obuf_top );
}
}
}
void TcpSocket::Send(const std::string &str,int i)
{
SendBuf(str.c_str(),str.size(),i);
}
void TcpSocket::SendBuf(const char *buf,size_t len,int)
{
if (!Ready() && !Connecting())
{
Handler().LogError(this, "SendBuf", -1, "Attempt to write to a non-ready socket" ); // warning
if (GetSocket() == INVALID_SOCKET)
Handler().LogError(this, "SendBuf", 0, " * GetSocket() == INVALID_SOCKET", LOG_LEVEL_INFO);
if (Connecting())
Handler().LogError(this, "SendBuf", 0, " * Connecting()", LOG_LEVEL_INFO);
if (CloseAndDelete())
Handler().LogError(this, "SendBuf", 0, " * CloseAndDelete()", LOG_LEVEL_INFO);
return;
}
if (!IsConnected())
{
Handler().LogError(this, "SendBuf", -1, "Attempt to write to a non-connected socket, will be sent on connect" ); // warning
Buffer(buf, len);
return;
}
if (m_obuf_top)
{
Buffer(buf, len);
return;
}
int n = TryWrite(buf, len);
if (n >= 0 && n < (int)len)
{
Buffer(buf + n, len - n);
}
// if ( data in buffer || !IsConnected )
// {
// add to buffer
// }
// else
// try_send
// if any data is unsent, buffer it and set m_wfds
// check output buffer set, set/reset m_wfds accordingly
{
bool br;
bool bw;
bool bx;
Handler().Get(GetSocket(), br, bw, bx);
if (m_obuf.size())
Set(br, true);
else
Set(br, false);
}
}
void TcpSocket::OnLine(const std::string& )
{
}
#ifdef _MSC_VER
#pragma warning(disable:4355)
#endif
TcpSocket::TcpSocket(const TcpSocket& s)
:StreamSocket(s)
,ibuf(0)
{
}
#ifdef _MSC_VER
#pragma warning(default:4355)
#endif
#ifdef ENABLE_SOCKS4
void TcpSocket::OnSocks4Connect()
{
char request[1000];
memset(request, 0, sizeof(request));
request[0] = 4; // socks v4
request[1] = 1; // command code: CONNECT
{
std::auto_ptr<SocketAddress> ad = GetClientRemoteAddress();
if (ad.get())
{
struct sockaddr *p0 = (struct sockaddr *)*ad;
struct sockaddr_in *p = (struct sockaddr_in *)p0;
if (p -> sin_family == AF_INET)
{
memcpy(request + 2, &p -> sin_port, 2); // nwbo is ok here
memcpy(request + 4, &p -> sin_addr, sizeof(struct in_addr));
}
else
{
/// \todo warn
}
}
else
{
/// \todo warn
}
}
strcpy(request + 8, GetSocks4Userid().c_str());
size_t length = GetSocks4Userid().size() + 8 + 1;
SendBuf(request, length);
m_socks4_state = 0;
}
void TcpSocket::OnSocks4ConnectFailed()
{
Handler().LogError(this,"OnSocks4ConnectFailed",0,"connection to socks4 server failed, trying direct connection",LOG_LEVEL_WARNING);
if (!Handler().Socks4TryDirect())
{
SetConnecting(false);
SetCloseAndDelete();
OnConnectFailed(); // just in case
}
else
{
SetRetryClientConnect();
}
}
bool TcpSocket::OnSocks4Read()
{
switch (m_socks4_state)
{
case 0:
ibuf.Read(&m_socks4_vn, 1);
m_socks4_state = 1;
break;
case 1:
ibuf.Read(&m_socks4_cd, 1);
m_socks4_state = 2;
break;
case 2:
if (GetInputLength() > 1)
{
ibuf.Read( (char *)&m_socks4_dstport, 2);
m_socks4_state = 3;
}
else
{
return true;
}
break;
case 3:
if (GetInputLength() > 3)
{
ibuf.Read( (char *)&m_socks4_dstip, 4);
SetSocks4(false);
switch (m_socks4_cd)
{
case 90:
OnConnect();
Handler().LogError(this, "OnSocks4Read", 0, "Connection established", LOG_LEVEL_INFO);
break;
case 91:
case 92:
case 93:
Handler().LogError(this,"OnSocks4Read",m_socks4_cd,"socks4 server reports connect failed",LOG_LEVEL_FATAL);
SetConnecting(false);
SetCloseAndDelete();
OnConnectFailed();
break;
default:
Handler().LogError(this,"OnSocks4Read",m_socks4_cd,"socks4 server unrecognized response",LOG_LEVEL_FATAL);
SetCloseAndDelete();
break;
}
}
else
{
return true;
}
break;
}
return false;
}
#endif
void TcpSocket::Sendf(const char *format, ...)
{
va_list ap;
va_start(ap, format);
char slask[5000]; // vsprintf / vsnprintf temporary
#ifdef _WIN32
vsprintf(slask, format, ap);
#else
vsnprintf(slask, 5000, format, ap);
#endif
va_end(ap);
Send( slask );
}
#ifdef HAVE_OPENSSL
void TcpSocket::OnSSLConnect()
{
SetNonblocking(true);
{
if (m_ssl_ctx)
{
DEB( fprintf(stderr, "SSL Context already initialized - closing socket\n");)
SetCloseAndDelete(true);
return;
}
InitSSLClient();
}
if (m_ssl_ctx)
{
/* Connect the SSL socket */
m_ssl = SSL_new(m_ssl_ctx);
if (!m_ssl)
{
DEB( fprintf(stderr, " m_ssl is NULL\n");)
SetCloseAndDelete(true);
return;
}
SSL_set_mode(m_ssl, SSL_MODE_AUTO_RETRY);
m_sbio = BIO_new_socket((int)GetSocket(), BIO_NOCLOSE);
if (!m_sbio)
{
DEB( fprintf(stderr, " m_sbio is NULL\n");)
SetCloseAndDelete(true);
return;
}
SSL_set_bio(m_ssl, m_sbio, m_sbio);
if (!SSLNegotiate())
{
SetSSLNegotiate();
}
}
else
{
SetCloseAndDelete();
}
}
void TcpSocket::OnSSLAccept()
{
SetNonblocking(true);
{
if (m_ssl_ctx)
{
DEB( fprintf(stderr, "SSL Context already initialized - closing socket\n");)
SetCloseAndDelete(true);
return;
}
InitSSLServer();
SetSSLServer();
}
if (m_ssl_ctx)
{
m_ssl = SSL_new(m_ssl_ctx);
if (!m_ssl)
{
DEB( fprintf(stderr, " m_ssl is NULL\n");)
SetCloseAndDelete(true);
return;
}
SSL_set_mode(m_ssl, SSL_MODE_AUTO_RETRY);
m_sbio = BIO_new_socket((int)GetSocket(), BIO_NOCLOSE);
if (!m_sbio)
{
DEB( fprintf(stderr, " m_sbio is NULL\n");)
SetCloseAndDelete(true);
return;
}
SSL_set_bio(m_ssl, m_sbio, m_sbio);
// if (!SSLNegotiate())
{
SetSSLNegotiate();
}
}
}
bool TcpSocket::SSLNegotiate()
{
if (!IsSSLServer()) // client
{
int r = SSL_connect(m_ssl);
if (r > 0)
{
SetSSLNegotiate(false);
/// \todo: resurrect certificate check... client
// CheckCertificateChain( "");//ServerHOST);
SetNonblocking(false);
//
{
SetConnected();
if (GetOutputLength())
{
OnWrite();
}
}
#ifdef ENABLE_RECONNECT
if (IsReconnect())
OnReconnect();
else
#endif
{
OnConnect();
}
Handler().LogError(this, "SSLNegotiate/SSL_connect", 0, "Connection established", LOG_LEVEL_INFO);
return true;
}
else
if (!r)
{
Handler().LogError(this, "SSLNegotiate/SSL_connect", 0, "Connection failed", LOG_LEVEL_INFO);
SetSSLNegotiate(false);
SetCloseAndDelete();
OnSSLConnectFailed();
}
else
{
r = SSL_get_error(m_ssl, r);
if (r != SSL_ERROR_WANT_READ && r != SSL_ERROR_WANT_WRITE)
{
Handler().LogError(this, "SSLNegotiate/SSL_connect", -1, "Connection failed", LOG_LEVEL_INFO);
DEB( fprintf(stderr, "SSL_connect() failed - closing socket, return code: %d\n",r);)
SetSSLNegotiate(false);
SetCloseAndDelete(true);
OnSSLConnectFailed();
}
}
}
else // server
{
int r = SSL_accept(m_ssl);
if (r > 0)
{
SetSSLNegotiate(false);
/// \todo: resurrect certificate check... server
// CheckCertificateChain( "");//ClientHOST);
SetNonblocking(false);
//
{
SetConnected();
if (GetOutputLength())
{
OnWrite();
}
}
OnAccept();
Handler().LogError(this, "SSLNegotiate/SSL_accept", 0, "Connection established", LOG_LEVEL_INFO);
return true;
}
else
if (!r)
{
Handler().LogError(this, "SSLNegotiate/SSL_accept", 0, "Connection failed", LOG_LEVEL_INFO);
SetSSLNegotiate(false);
SetCloseAndDelete();
OnSSLAcceptFailed();
}
else
{
r = SSL_get_error(m_ssl, r);
if (r != SSL_ERROR_WANT_READ && r != SSL_ERROR_WANT_WRITE)
{
Handler().LogError(this, "SSLNegotiate/SSL_accept", -1, "Connection failed", LOG_LEVEL_INFO);
DEB( fprintf(stderr, "SSL_accept() failed - closing socket, return code: %d\n",r);)
SetSSLNegotiate(false);
SetCloseAndDelete(true);
OnSSLAcceptFailed();
}
}
}
return false;
}
void TcpSocket::InitSSLClient()
{
InitializeContext("", SSLv23_method());
}
void TcpSocket::InitSSLServer()
{
Handler().LogError(this, "InitSSLServer", 0, "You MUST implement your own InitSSLServer method", LOG_LEVEL_FATAL);
SetCloseAndDelete();
}
void TcpSocket::InitializeContext(const std::string& context, SSL_METHOD *meth_in)
{
/* Create our context*/
static std::map<std::string, SSL_CTX *> client_contexts;
if (client_contexts.find(context) == client_contexts.end())
{
SSL_METHOD *meth = meth_in ? meth_in : SSLv3_method();
m_ssl_ctx = client_contexts[context] = SSL_CTX_new(meth);
SSL_CTX_set_mode(m_ssl_ctx, SSL_MODE_AUTO_RETRY);
}
else
{
m_ssl_ctx = client_contexts[context];
}
}
void TcpSocket::InitializeContext(const std::string& context,const std::string& keyfile,const std::string& password,SSL_METHOD *meth_in)
{
/* Create our context*/
static std::map<std::string, SSL_CTX *> server_contexts;
if (server_contexts.find(context) == server_contexts.end())
{
SSL_METHOD *meth = meth_in ? meth_in : SSLv3_method();
m_ssl_ctx = server_contexts[context] = SSL_CTX_new(meth);
SSL_CTX_set_mode(m_ssl_ctx, SSL_MODE_AUTO_RETRY);
// session id
if (!context.empty())
SSL_CTX_set_session_id_context(m_ssl_ctx, (const unsigned char *)context.c_str(), (unsigned int)context.size());
else
SSL_CTX_set_session_id_context(m_ssl_ctx, (const unsigned char *)"--empty--", 9);
}
else
{
m_ssl_ctx = server_contexts[context];
}
/* Load our keys and certificates*/
if (!(SSL_CTX_use_certificate_file(m_ssl_ctx, keyfile.c_str(), SSL_FILETYPE_PEM)))
{
Handler().LogError(this, "TcpSocket InitializeContext", 0, "Couldn't read certificate file " + keyfile, LOG_LEVEL_FATAL);
}
m_password = password;
SSL_CTX_set_default_passwd_cb(m_ssl_ctx, SSL_password_cb);
SSL_CTX_set_default_passwd_cb_userdata(m_ssl_ctx, this);
if (!(SSL_CTX_use_PrivateKey_file(m_ssl_ctx, keyfile.c_str(), SSL_FILETYPE_PEM)))
{
Handler().LogError(this, "TcpSocket InitializeContext", 0, "Couldn't read private key file " + keyfile, LOG_LEVEL_FATAL);
}
}
void TcpSocket::InitializeContext(const std::string& context,const std::string& certfile,const std::string& keyfile,const std::string& password,SSL_METHOD *meth_in)
{
/* Create our context*/
static std::map<std::string, SSL_CTX *> server_contexts;
if (server_contexts.find(context) == server_contexts.end())
{
SSL_METHOD *meth = meth_in ? meth_in : SSLv3_method();
m_ssl_ctx = server_contexts[context] = SSL_CTX_new(meth);
SSL_CTX_set_mode(m_ssl_ctx, SSL_MODE_AUTO_RETRY);
// session id
if (context.size())
SSL_CTX_set_session_id_context(m_ssl_ctx, (const unsigned char *)context.c_str(), (unsigned int)context.size());
else
SSL_CTX_set_session_id_context(m_ssl_ctx, (const unsigned char *)"--empty--", 9);
}
else
{
m_ssl_ctx = server_contexts[context];
}
/* Load our keys and certificates*/
if (!(SSL_CTX_use_certificate_file(m_ssl_ctx, certfile.c_str(), SSL_FILETYPE_PEM)))
{
Handler().LogError(this, "TcpSocket InitializeContext", 0, "Couldn't read certificate file " + keyfile, LOG_LEVEL_FATAL);
}
m_password = password;
SSL_CTX_set_default_passwd_cb(m_ssl_ctx, SSL_password_cb);
SSL_CTX_set_default_passwd_cb_userdata(m_ssl_ctx, this);
if (!(SSL_CTX_use_PrivateKey_file(m_ssl_ctx, keyfile.c_str(), SSL_FILETYPE_PEM)))
{
Handler().LogError(this, "TcpSocket InitializeContext", 0, "Couldn't read private key file " + keyfile, LOG_LEVEL_FATAL);
}
}
int TcpSocket::SSL_password_cb(char *buf,int num,int rwflag,void *userdata)
{
Socket *p0 = static_cast<Socket *>(userdata);
TcpSocket *p = dynamic_cast<TcpSocket *>(p0);
std::string pw = p ? p -> GetPassword() : "";
if ( (size_t)num < pw.size() + 1)
{
return 0;
}
strcpy(buf,pw.c_str());
return (int)pw.size();
}
#endif // HAVE_OPENSSL
int TcpSocket::Close()
{
if (GetSocket() == INVALID_SOCKET) // this could happen
{
Handler().LogError(this, "Socket::Close", 0, "file descriptor invalid", LOG_LEVEL_WARNING);
return 0;
}
int n;
SetNonblocking(true);
if (!Lost() && IsConnected() && !(GetShutdown() & SHUT_WR))
{
if (shutdown(GetSocket(), SHUT_WR) == -1)
{
// failed...
Handler().LogError(this, "shutdown", Errno, StrError(Errno), LOG_LEVEL_ERROR);
}
}
//
char tmp[1000];
if (!Lost() && (n = recv(GetSocket(),tmp,1000,0)) >= 0)
{
if (n)
{
Handler().LogError(this, "read() after shutdown", n, "bytes read", LOG_LEVEL_WARNING);
}
}
#ifdef HAVE_OPENSSL
if (IsSSL() && m_ssl)
SSL_shutdown(m_ssl);
if (m_ssl)
{
SSL_free(m_ssl);
m_ssl = NULL;
}
#endif
return Socket::Close();
}
#ifdef HAVE_OPENSSL
SSL_CTX *TcpSocket::GetSslContext()
{
if (!m_ssl_ctx)
Handler().LogError(this, "GetSslContext", 0, "SSL Context is NULL; check InitSSLServer/InitSSLClient", LOG_LEVEL_WARNING);
return m_ssl_ctx;
}
SSL *TcpSocket::GetSsl()
{
if (!m_ssl)
Handler().LogError(this, "GetSsl", 0, "SSL is NULL; check InitSSLServer/InitSSLClient", LOG_LEVEL_WARNING);
return m_ssl;
}
#endif
#ifdef ENABLE_RECONNECT
void TcpSocket::SetReconnect(bool x)
{
m_b_reconnect = x;
}
#endif
void TcpSocket::OnRawData(const char *buf_in,size_t len)
{
}
size_t TcpSocket::GetInputLength()
{
return ibuf.GetLength();
}
size_t TcpSocket::GetOutputLength()
{
return m_output_length;
}
uint64_t TcpSocket::GetBytesReceived(bool clear)
{
uint64_t z = m_bytes_received;
if (clear)
m_bytes_received = 0;
return z;
}
uint64_t TcpSocket::GetBytesSent(bool clear)
{
uint64_t z = m_bytes_sent;
if (clear)
m_bytes_sent = 0;
return z;
}
#ifdef ENABLE_RECONNECT
bool TcpSocket::Reconnect()
{
return m_b_reconnect;
}
void TcpSocket::SetIsReconnect(bool x)
{
m_b_is_reconnect = x;
}
bool TcpSocket::IsReconnect()
{
return m_b_is_reconnect;
}
#endif
#ifdef HAVE_OPENSSL
const std::string& TcpSocket::GetPassword()
{
return m_password;
}
#endif
void TcpSocket::DisableInputBuffer(bool x)
{
m_b_input_buffer_disabled = x;
}
void TcpSocket::OnOptions(int family,int type,int protocol,SOCKET s)
{
DEB( fprintf(stderr, "Socket::OnOptions()\n");)
#ifdef SO_NOSIGPIPE
SetSoNosigpipe(true);
#endif
SetSoReuseaddr(true);
SetSoKeepalive(true);
}
void TcpSocket::SetLineProtocol(bool x)
{
StreamSocket::SetLineProtocol(x);
DisableInputBuffer(x);
}
bool TcpSocket::SetTcpNodelay(bool x)
{
#ifdef TCP_NODELAY
int optval = x ? 1 : 0;
if (setsockopt(GetSocket(), IPPROTO_TCP, TCP_NODELAY, (char *)&optval, sizeof(optval)) == -1)
{
Handler().LogError(this, "setsockopt(IPPROTO_TCP, TCP_NODELAY)", Errno, StrError(Errno), LOG_LEVEL_FATAL);
return false;
}
return true;
#else
Handler().LogError(this, "socket option not available", 0, "TCP_NODELAY", LOG_LEVEL_INFO);
return false;
#endif
}
TcpSocket::CircularBuffer::CircularBuffer(size_t size)
:buf(new char[2 * size])
,m_max(size)
,m_q(0)
,m_b(0)
,m_t(0)
,m_count(0)
{
}
TcpSocket::CircularBuffer::~CircularBuffer()
{
delete[] buf;
}
bool TcpSocket::CircularBuffer::Write(const char *s,size_t l)
{
if (m_q + l > m_max)
{
return false; // overflow
}
m_count += (unsigned long)l;
if (m_t + l > m_max) // block crosses circular border
{
size_t l1 = m_max - m_t; // size left until circular border crossing
// always copy full block to buffer(buf) + top pointer(m_t)
// because we have doubled the buffer size for performance reasons
memcpy(buf + m_t, s, l);
memcpy(buf, s + l1, l - l1);
m_t = l - l1;
m_q += l;
}
else
{
memcpy(buf + m_t, s, l);
memcpy(buf + m_max + m_t, s, l);
m_t += l;
if (m_t >= m_max)
m_t -= m_max;
m_q += l;
}
return true;
}
bool TcpSocket::CircularBuffer::Read(char *s,size_t l)
{
if (l > m_q)
{
return false; // not enough chars
}
if (m_b + l > m_max) // block crosses circular border
{
size_t l1 = m_max - m_b;
if (s)
{
memcpy(s, buf + m_b, l1);
memcpy(s + l1, buf, l - l1);
}
m_b = l - l1;
m_q -= l;
}
else
{
if (s)
{
memcpy(s, buf + m_b, l);
}
m_b += l;
if (m_b >= m_max)
m_b -= m_max;
m_q -= l;
}
if (!m_q)
{
m_b = m_t = 0;
}
return true;
}
bool TcpSocket::CircularBuffer::SoftRead(char *s, size_t l)
{
if (l > m_q)
{
return false;
}
if (m_b + l > m_max) // block crosses circular border
{
size_t l1 = m_max - m_b;
if (s)
{
memcpy(s, buf + m_b, l1);
memcpy(s + l1, buf, l - l1);
}
}
else
{
if (s)
{
memcpy(s, buf + m_b, l);
}
}
return true;
}
bool TcpSocket::CircularBuffer::Remove(size_t l)
{
return Read(NULL, l);
}
size_t TcpSocket::CircularBuffer::GetLength()
{
return m_q;
}
const char *TcpSocket::CircularBuffer::GetStart()
{
return buf + m_b;
}
size_t TcpSocket::CircularBuffer::GetL()
{
return (m_b + m_q > m_max) ? m_max - m_b : m_q;
}
size_t TcpSocket::CircularBuffer::Space()
{
return m_max - m_q;
}
unsigned long TcpSocket::CircularBuffer::ByteCounter(bool clear)
{
if (clear)
{
unsigned long x = m_count;
m_count = 0;
return x;
}
return m_count;
}
std::string TcpSocket::CircularBuffer::ReadString(size_t l)
{
char *sz = new char[l + 1];
if (!Read(sz, l)) // failed, debug printout in Read() method
{
delete[] sz;
return "";
}
sz[l] = 0;
std::string tmp = sz;
delete[] sz;
return tmp;
}
void TcpSocket::OnConnectTimeout()
{
Handler().LogError(this, "connect", -1, "connect timeout", LOG_LEVEL_FATAL);
#ifdef ENABLE_SOCKS4
if (Socks4())
{
OnSocks4ConnectFailed();
// retry direct connection
}
else
#endif
if (GetConnectionRetry() == -1 ||
(GetConnectionRetry() && GetConnectionRetries() < GetConnectionRetry()) )
{
IncreaseConnectionRetries();
// ask socket via OnConnectRetry callback if we should continue trying
if (OnConnectRetry())
{
SetRetryClientConnect();
}
else
{
SetCloseAndDelete( true );
/// \todo state reason why connect failed
OnConnectFailed();
}
}
else
{
SetCloseAndDelete(true);
/// \todo state reason why connect failed
OnConnectFailed();
}
//
SetConnecting(false);
}
#ifdef _WIN32
void TcpSocket::OnException()
{
if (Connecting())
{
#ifdef ENABLE_SOCKS4
if (Socks4())
OnSocks4ConnectFailed();
else
#endif
if (GetConnectionRetry() == -1 ||
(GetConnectionRetry() &&
GetConnectionRetries() < GetConnectionRetry() ))
{
// even though the connection failed at once, only retry after
// the connection timeout
// should we even try to connect again, when CheckConnect returns
// false it's because of a connection error - not a timeout...
}
else
{
SetConnecting(false); // tnx snibbe
SetCloseAndDelete();
OnConnectFailed();
}
return;
}
// %! exception doesn't always mean something bad happened, this code should be reworked
// errno valid here?
int err = SoError();
Handler().LogError(this, "exception on select", err, StrError(err), LOG_LEVEL_FATAL);
SetCloseAndDelete();
}
#endif // _WIN32
int TcpSocket::Protocol()
{
return IPPROTO_TCP;
}
void TcpSocket::SetTransferLimit(size_t sz)
{
m_transfer_limit = sz;
}
void TcpSocket::OnTransferLimit()
{
}
#ifdef SOCKETS_NAMESPACE
}
#endif
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