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Diffstat (limited to 'Sockets/TcpSocket.cpp')
| -rw-r--r-- | Sockets/TcpSocket.cpp | 1729 |
1 files changed, 1729 insertions, 0 deletions
diff --git a/Sockets/TcpSocket.cpp b/Sockets/TcpSocket.cpp new file mode 100644 index 0000000..960ac35 --- /dev/null +++ b/Sockets/TcpSocket.cpp @@ -0,0 +1,1729 @@ +/** \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 "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 +#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); +#ifdef ENABLE_POOL + SetLost(); +#endif + break; + default: +DEB( fprintf(stderr, "SSL read problem, errcode = %d\n",n);) + OnDisconnect(); + SetCloseAndDelete(true); + SetFlushBeforeClose(false); +#ifdef ENABLE_POOL + SetLost(); +#endif + } + return; + } + else + if (!n) + { + OnDisconnect(); + SetCloseAndDelete(true); + SetFlushBeforeClose(false); +#ifdef ENABLE_POOL + SetLost(); +#endif + 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); +#ifdef ENABLE_POOL + SetLost(); +#endif + return; + } + else + if (!n) + { + OnDisconnect(); + SetCloseAndDelete(true); + SetFlushBeforeClose(false); +#ifdef ENABLE_POOL + SetLost(); +#endif + 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); +#ifdef ENABLE_POOL + SetLost(); +#endif + 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); +#ifdef ENABLE_POOL + SetLost(); +#endif +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); +#ifdef ENABLE_POOL + SetLost(); +#endif + } + 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.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, 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 (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 ((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::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 + |