705 lines
20 KiB
C++
705 lines
20 KiB
C++
//This file is part of Glest Shared Library (www.glest.org)
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//Copyright (C) 2005 Matthias Braun <matze@braunis.de>
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//You can redistribute this code and/or modify it under
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//the terms of the GNU General Public License as published by the Free Software
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//Foundation; either version 2 of the License, or (at your option) any later
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//version.
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#include "socket.h"
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#include <cstring>
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#include <cstdio>
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#include <cstdlib>
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#include <stdexcept>
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#include <sstream>
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#if defined(HAVE_SYS_IOCTL_H)
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#define BSD_COMP /* needed for FIONREAD on Solaris2 */
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#include <sys/ioctl.h>
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#endif
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#if defined(HAVE_SYS_FILIO_H) /* needed for FIONREAD on Solaris 2.5 */
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#include <sys/filio.h>
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#endif
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#include "conversion.h"
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using namespace std;
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using namespace Shared::Util;
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namespace Shared{ namespace Platform{
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bool Socket::enableDebugText = true;
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bool Socket::enableNetworkDebugInfo = true;
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// =====================================================
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// class Ip
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// =====================================================
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Ip::Ip(){
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bytes[0]= 0;
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bytes[1]= 0;
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bytes[2]= 0;
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bytes[3]= 0;
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}
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Ip::Ip(unsigned char byte0, unsigned char byte1, unsigned char byte2, unsigned char byte3){
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bytes[0]= byte0;
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bytes[1]= byte1;
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bytes[2]= byte2;
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bytes[3]= byte3;
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}
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Ip::Ip(const string& ipString){
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int offset= 0;
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int byteIndex= 0;
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for(byteIndex= 0; byteIndex<4; ++byteIndex){
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int dotPos= ipString.find_first_of('.', offset);
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bytes[byteIndex]= atoi(ipString.substr(offset, dotPos-offset).c_str());
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offset= dotPos+1;
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}
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}
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string Ip::getString() const{
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return intToStr(bytes[0]) + "." + intToStr(bytes[1]) + "." + intToStr(bytes[2]) + "." + intToStr(bytes[3]);
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}
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// ===============================================
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// class Socket
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// ===============================================
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Socket::Socket(int sock){
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this->sock= sock;
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}
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Socket::Socket()
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{
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sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
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if(sock < 0)
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{
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throwException("Error creating socket");
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}
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}
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Socket::~Socket()
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{
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if(Socket::enableNetworkDebugInfo) printf("In [%s::%s] START closing socket = %d...\n",__FILE__,__FUNCTION__,sock);
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disconnectSocket();
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if(Socket::enableNetworkDebugInfo) printf("In [%s::%s] END closing socket = %d...\n",__FILE__,__FUNCTION__,sock);
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}
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void Socket::disconnectSocket()
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{
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if(Socket::enableNetworkDebugInfo) printf("In [%s::%s] START closing socket = %d...\n",__FILE__,__FUNCTION__,sock);
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if(sock > 0)
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{
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if(Socket::enableNetworkDebugInfo) printf("In [%s::%s] calling shutdown and close for socket = %d...\n",__FILE__,__FUNCTION__,sock);
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::shutdown(sock,2);
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::close(sock);
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sock = -1;
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}
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if(Socket::enableNetworkDebugInfo) printf("In [%s::%s] END closing socket = %d...\n",__FILE__,__FUNCTION__,sock);
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}
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// Int lookup is socket fd while bool result is whether or not that socket was signalled for reading
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bool Socket::hasDataToRead(std::map<int,bool> &socketTriggeredList)
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{
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bool bResult = false;
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if(socketTriggeredList.size() > 0)
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{
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/* Watch stdin (fd 0) to see when it has input. */
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fd_set rfds;
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FD_ZERO(&rfds);
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int imaxsocket = 0;
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for(std::map<int,bool>::iterator itermap = socketTriggeredList.begin();
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itermap != socketTriggeredList.end(); itermap++)
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{
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int socket = itermap->first;
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if(socket > 0)
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{
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FD_SET(socket, &rfds);
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imaxsocket = max(socket,imaxsocket);
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}
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}
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if(imaxsocket > 0)
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{
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/* Wait up to 0 seconds. */
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struct timeval tv;
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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int retval = select(imaxsocket + 1, &rfds, NULL, NULL, &tv);
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if(retval < 0)
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{
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char szBuf[1024]="";
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sprintf(szBuf,"In [%s::%s] ERROR SELECTING SOCKET DATA retval = %d errno = %d [%s]",__FILE__,__FUNCTION__,retval,errno,strerror(errno));
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fprintf(stderr, "%s", szBuf);
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}
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else if(retval)
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{
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bResult = true;
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if(Socket::enableNetworkDebugInfo) printf("In [%s::%s] select detected data imaxsocket = %d...\n",__FILE__,__FUNCTION__,imaxsocket);
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for(std::map<int,bool>::iterator itermap = socketTriggeredList.begin();
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itermap != socketTriggeredList.end(); itermap++)
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{
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int socket = itermap->first;
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if (FD_ISSET(socket, &rfds))
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{
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if(Socket::enableNetworkDebugInfo) printf("In [%s] FD_ISSET true for socket %d...\n",__FUNCTION__,socket);
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itermap->second = true;
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}
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else
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{
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itermap->second = false;
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}
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}
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if(Socket::enableNetworkDebugInfo) printf("In [%s::%s] socketTriggeredList->size() = %d\n",__FILE__,__FUNCTION__,socketTriggeredList.size());
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}
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}
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}
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return bResult;
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}
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bool Socket::hasDataToRead()
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{
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return Socket::hasDataToRead(sock) ;
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}
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bool Socket::hasDataToRead(int socket)
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{
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bool bResult = false;
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if(socket > 0)
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{
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fd_set rfds;
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struct timeval tv;
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/* Watch stdin (fd 0) to see when it has input. */
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FD_ZERO(&rfds);
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FD_SET(socket, &rfds);
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/* Wait up to 0 seconds. */
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tv.tv_sec = 0;
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tv.tv_usec = 0;
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int retval = select(socket + 1, &rfds, NULL, NULL, &tv);
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if(retval)
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{
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if (FD_ISSET(socket, &rfds))
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{
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bResult = true;
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}
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}
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}
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return bResult;
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}
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int Socket::getDataToRead(){
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unsigned long size = 0;
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//fd_set rfds;
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//struct timeval tv;
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//int retval;
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/* Watch stdin (fd 0) to see when it has input. */
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//FD_ZERO(&rfds);
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//FD_SET(sock, &rfds);
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/* Wait up to 0 seconds. */
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//tv.tv_sec = 0;
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//tv.tv_usec = 0;
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//retval = select(sock + 1, &rfds, NULL, NULL, &tv);
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//if(retval)
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if(sock > 0)
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{
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/* ioctl isn't posix, but the following seems to work on all modern
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* unixes */
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int err= ioctl(sock, FIONREAD, &size);
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if(err < 0 && errno != EAGAIN)
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{
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char szBuf[1024]="";
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sprintf(szBuf,"In [%s::%s] ERROR PEEKING SOCKET DATA, err = %d errno = %d [%s]\n",__FILE__,__FUNCTION__,err,errno,strerror(errno));
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//throwException(szBuf);
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printf("%s",szBuf);
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}
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else if(err == 0)
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{
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//if(Socket::enableNetworkDebugInfo) printf("In [%s] ioctl returned = %d, size = %ld\n",__FUNCTION__,err,size);
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}
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}
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return static_cast<int>(size);
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}
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int Socket::send(const void *data, int dataSize) {
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ssize_t bytesSent= 0;
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if(sock > 0)
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{
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bytesSent = ::send(sock, reinterpret_cast<const char*>(data), dataSize, 0);
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}
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if(bytesSent < 0 && errno != EAGAIN)
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{
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char szBuf[1024]="";
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sprintf(szBuf,"In [%s::%s] ERROR WRITING SOCKET DATA, err = %d errno = %d [%s]\n",__FILE__,__FUNCTION__,bytesSent,errno,strerror(errno));
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//throwException(szBuf);
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printf("%s",szBuf);
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}
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else if(bytesSent < 0 && errno == EAGAIN)
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{
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printf("In [%s::%s] #1 EAGAIN during send, trying again...\n",__FILE__,__FUNCTION__);
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time_t tStartTimer = time(NULL);
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while((bytesSent < 0 && errno == EAGAIN) && (difftime(time(NULL),tStartTimer) <= 5))
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{
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if(Socket::isWritable(true) == true)
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{
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bytesSent = ::send(sock, reinterpret_cast<const char*>(data), dataSize, 0);
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printf("In [%s::%s] #2 EAGAIN during send, trying again returned: %d\n",__FILE__,__FUNCTION__,bytesSent);
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}
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}
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}
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if(bytesSent <= 0)
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{
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int iErr = errno;
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disconnectSocket();
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char szBuf[1024]="";
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sprintf(szBuf,"[%s::%s] DISCONNECTED SOCKET error while sending socket data, bytesSent = %d, errno = %d [%s]\n",__FILE__,__FUNCTION__,bytesSent,iErr,strerror(iErr));
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printf("%s",szBuf);
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//throwException(szBuf);
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}
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if(Socket::enableNetworkDebugInfo) printf("In [%s::%s] sock = %d, bytesSent = %d\n",__FILE__,__FUNCTION__,sock,bytesSent);
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return static_cast<int>(bytesSent);
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}
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int Socket::receive(void *data, int dataSize)
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{
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ssize_t bytesReceived = 0;
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if(sock > 0)
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{
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bytesReceived = recv(sock, reinterpret_cast<char*>(data), dataSize, 0);
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}
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if(bytesReceived < 0 && errno != EAGAIN)
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{
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char szBuf[1024]="";
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sprintf(szBuf,"[%s::%s] ERROR READING SOCKET DATA error while sending socket data, bytesSent = %d, errno = %d [%s]\n",__FILE__,__FUNCTION__,bytesReceived,errno,strerror(errno));
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//throwException(szBuf);
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printf("%s",szBuf);
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}
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else if(bytesReceived < 0 && errno == EAGAIN)
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{
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printf("In [%s::%s] #1 EAGAIN during receive, trying again...\n",__FILE__,__FUNCTION__);
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time_t tStartTimer = time(NULL);
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while((bytesReceived < 0 && errno == EAGAIN) && (difftime(time(NULL),tStartTimer) <= 5))
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{
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if(Socket::isReadable() == true)
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{
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bytesReceived = recv(sock, reinterpret_cast<char*>(data), dataSize, 0);
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printf("In [%s::%s] #2 EAGAIN during receive, trying again returned: %d\n",__FILE__,__FUNCTION__,bytesReceived);
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}
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}
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}
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if(bytesReceived <= 0)
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{
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int iErr = errno;
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disconnectSocket();
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char szBuf[1024]="";
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sprintf(szBuf,"[%s::%s] DISCONNECTED SOCKET error while receiving socket data, bytesReceived = %d, errno = %d [%s]\n",__FILE__,__FUNCTION__,bytesReceived,iErr,strerror(iErr));
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printf("%s",szBuf);
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//throwException(szBuf);
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}
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return static_cast<int>(bytesReceived);
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}
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int Socket::peek(void *data, int dataSize){
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ssize_t err = 0;
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if(sock > 0)
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{
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err = recv(sock, reinterpret_cast<char*>(data), dataSize, MSG_PEEK);
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}
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if(err < 0 && errno != EAGAIN)
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{
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char szBuf[1024]="";
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sprintf(szBuf,"[%s::%s] ERROR PEEKING SOCKET DATA error while sending socket data, bytesSent = %d, errno = %d [%s]\n",__FILE__,__FUNCTION__,err,errno,strerror(errno));
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//throwException(szBuf);
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disconnectSocket();
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}
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else if(err < 0 && errno == EAGAIN)
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{
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printf("In [%s::%s] #1 EAGAIN during peek, trying again...\n",__FILE__,__FUNCTION__);
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time_t tStartTimer = time(NULL);
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while((err < 0 && errno == EAGAIN) && (difftime(time(NULL),tStartTimer) <= 5))
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{
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if(Socket::isReadable() == true)
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{
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err = recv(sock, reinterpret_cast<char*>(data), dataSize, MSG_PEEK);
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printf("In [%s::%s] #2 EAGAIN during peek, trying again returned: %d\n",__FILE__,__FUNCTION__,err);
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}
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}
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}
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if(err <= 0)
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{
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int iErr = errno;
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disconnectSocket();
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char szBuf[1024]="";
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sprintf(szBuf,"[%s::%s] DISCONNECTED SOCKET error while peeking socket data, err = %d, errno = %d [%s]\n",__FILE__,__FUNCTION__,err,iErr,strerror(iErr));
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printf("%s",szBuf);
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//throwException(szBuf);
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}
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return static_cast<int>(err);
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}
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void Socket::setBlock(bool block){
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int err= fcntl(sock, F_SETFL, block ? 0 : O_NONBLOCK);
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if(err<0){
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throwException("Error setting I/O mode for socket");
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}
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}
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bool Socket::isReadable()
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{
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if(sock <= 0) return false;
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struct timeval tv;
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tv.tv_sec= 0;
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tv.tv_usec= 1;
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fd_set set;
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FD_ZERO(&set);
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FD_SET(sock, &set);
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int i= select(sock+1, &set, NULL, NULL, &tv);
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if(i < 0)
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{
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if(difftime(time(NULL),lastDebugEvent) >= 1)
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{
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lastDebugEvent = time(NULL);
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//throwException("Error selecting socket");
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char szBuf[1024]="";
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sprintf(szBuf,"[%s::%s] error while selecting socket data, err = %d, errno = %d [%s]\n",__FILE__,__FUNCTION__,i,errno,strerror(errno));
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printf("%s",szBuf);
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}
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}
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//return (i == 1 && FD_ISSET(sock, &set));
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return (i == 1);
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}
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bool Socket::isWritable(bool waitOnDelayedResponse)
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{
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if(sock <= 0) return false;
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struct timeval tv;
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tv.tv_sec= 0;
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tv.tv_usec= 1;
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fd_set set;
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FD_ZERO(&set);
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FD_SET(sock, &set);
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bool result = false;
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do
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{
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int i = select(sock+1, NULL, &set, NULL, &tv);
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if(i < 0 )
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{
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if(difftime(time(NULL),lastDebugEvent) >= 1)
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{
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lastDebugEvent = time(NULL);
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char szBuf[1024]="";
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sprintf(szBuf,"[%s::%s] error while selecting socket data, err = %d, errno = %d [%s]\n",__FILE__,__FUNCTION__,i,errno,strerror(errno));
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printf("%s",szBuf);
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}
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waitOnDelayedResponse = false;
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//throwException("Error selecting socket");
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}
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else if(i == 0)
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{
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if(difftime(time(NULL),lastDebugEvent) >= 1)
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{
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lastDebugEvent = time(NULL);
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char szBuf[1024]="";
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sprintf(szBuf,"[%s::%s] TIMEOUT while selecting socket data, err = %d, errno = %d [%s]\n",__FILE__,__FUNCTION__,i,errno,strerror(errno));
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printf("%s",szBuf);
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}
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if(waitOnDelayedResponse == false)
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{
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result = true;
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}
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}
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else
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{
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result = true;
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}
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} while(waitOnDelayedResponse == true && result == false);
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//return (i == 1 && FD_ISSET(sock, &set));
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return result;
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}
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bool Socket::isConnected()
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{
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//if the socket is not writable then it is not conencted
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if(isWritable(false) == false)
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{
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return false;
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}
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//if the socket is readable it is connected if we can read a byte from it
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if(isReadable())
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{
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char tmp;
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int err = peek(&tmp, sizeof(tmp));
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return (err > 0);
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/*
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int err = recv(sock, &tmp, sizeof(tmp), MSG_PEEK);
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if(err <= 0 && errno != EAGAIN)
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{
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int iErr = errno;
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disconnectSocket();
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char szBuf[1024]="";
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sprintf(szBuf,"[%s::%s] DISCONNECTED SOCKET error while peeking isconnected socket data, err = %d, errno = %d [%s]\n",__FILE__,__FUNCTION__,err,iErr,strerror(iErr));
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printf("%s",szBuf);
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return false;
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}
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else if(err <= 0)
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{
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int iErr = errno;
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//disconnectSocket();
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char szBuf[1024]="";
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sprintf(szBuf,"[%s::%s] #2 DISCONNECTED SOCKET error while peeking isconnected socket data, err = %d, errno = %d [%s]\n",__FILE__,__FUNCTION__,err,iErr,strerror(iErr));
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printf("%s",szBuf);
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}
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*/
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}
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//otherwise the socket is connected
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return true;
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}
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string Socket::getHostName() const {
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const int strSize= 256;
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char hostname[strSize];
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gethostname(hostname, strSize);
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return hostname;
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}
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string Socket::getIp() const{
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hostent* info= gethostbyname(getHostName().c_str());
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unsigned char* address;
|
|
|
|
if(info==NULL){
|
|
throw runtime_error("Error getting host by name");
|
|
}
|
|
|
|
address= reinterpret_cast<unsigned char*>(info->h_addr_list[0]);
|
|
|
|
if(address==NULL){
|
|
throw runtime_error("Error getting host ip");
|
|
}
|
|
|
|
return
|
|
intToStr(address[0]) + "." +
|
|
intToStr(address[1]) + "." +
|
|
intToStr(address[2]) + "." +
|
|
intToStr(address[3]);
|
|
}
|
|
|
|
void Socket::throwException(const string &str){
|
|
std::stringstream msg;
|
|
msg << str << " (Error: " << strerror(errno) << ")";
|
|
throw runtime_error(msg.str());
|
|
}
|
|
|
|
// ===============================================
|
|
// class ClientSocket
|
|
// ===============================================
|
|
|
|
void ClientSocket::connect(const Ip &ip, int port)
|
|
{
|
|
sockaddr_in addr;
|
|
memset(&addr, 0, sizeof(addr));
|
|
|
|
addr.sin_family= AF_INET;
|
|
addr.sin_addr.s_addr= inet_addr(ip.getString().c_str());
|
|
addr.sin_port= htons(port);
|
|
|
|
int err= ::connect(sock, reinterpret_cast<const sockaddr*>(&addr), sizeof(addr));
|
|
if(err < 0)
|
|
{
|
|
char szBuf[1024]="";
|
|
sprintf(szBuf,"In [%s::%s] #2 Error connecting socket for IP: %s for Port: %d err = %d errno = %d [%s]\n",__FILE__,__FUNCTION__,ip.getString().c_str(),port,err,errno,strerror(errno));
|
|
fprintf(stderr, "%s", szBuf);
|
|
|
|
if (errno == EINPROGRESS)
|
|
{
|
|
fd_set myset;
|
|
struct timeval tv;
|
|
int valopt;
|
|
socklen_t lon;
|
|
|
|
fprintf(stderr, "In [%s::%s] EINPROGRESS in connect() - selecting\n",__FILE__,__FUNCTION__);
|
|
|
|
do
|
|
{
|
|
tv.tv_sec = 10;
|
|
tv.tv_usec = 0;
|
|
|
|
FD_ZERO(&myset);
|
|
FD_SET(sock, &myset);
|
|
|
|
err = select(sock+1, NULL, &myset, NULL, &tv);
|
|
|
|
if (err < 0 && errno != EINTR)
|
|
{
|
|
sprintf(szBuf, "In [%s::%s] Error connecting %d - [%s]\n",__FILE__,__FUNCTION__,errno, strerror(errno));
|
|
//throwException(szBuf);
|
|
fprintf(stderr, "%s", szBuf);
|
|
break;
|
|
}
|
|
else if (err > 0)
|
|
{
|
|
// Socket selected for write
|
|
lon = sizeof(int);
|
|
if (getsockopt(sock, SOL_SOCKET, SO_ERROR, (void*)(&valopt), &lon) < 0)
|
|
{
|
|
sprintf(szBuf, "In [%s::%s] Error in getsockopt() %d - [%s]\n",__FILE__,__FUNCTION__,errno, strerror(errno));
|
|
//throwException(szBuf);
|
|
fprintf(stderr, "%s", szBuf);
|
|
break;
|
|
}
|
|
// Check the value returned...
|
|
if (valopt)
|
|
{
|
|
sprintf(szBuf, "In [%s::%s] Error in delayed connection() %d - [%s]\n",__FILE__,__FUNCTION__,valopt, strerror(valopt));
|
|
//throwException(szBuf);
|
|
fprintf(stderr, "%s", szBuf);
|
|
break;
|
|
}
|
|
|
|
errno = 0;
|
|
fprintf(stderr, "In [%s::%s] Apparent recovery for connection sock = %d, err = %d, errno = %d\n",__FILE__,__FUNCTION__,sock,err,errno);
|
|
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
sprintf(szBuf, "In [%s::%s] Timeout in select() - Cancelling!\n",__FILE__,__FUNCTION__);
|
|
//throwException(szBuf);
|
|
fprintf(stderr, "%s", szBuf);
|
|
|
|
disconnectSocket();
|
|
break;
|
|
}
|
|
} while (1);
|
|
}
|
|
|
|
if(err < 0)
|
|
{
|
|
fprintf(stderr, "In [%s::%s] Before END sock = %d, err = %d, errno = %d [%s]\n",__FILE__,__FUNCTION__,sock,err,errno,strerror(errno));
|
|
//throwException(szBuf);
|
|
disconnectSocket();
|
|
}
|
|
else
|
|
{
|
|
fprintf(stderr, "In [%s::%s] Valid recovery for connection sock = %d, err = %d, errno = %d\n",__FILE__,__FUNCTION__,sock,err,errno);
|
|
}
|
|
}
|
|
}
|
|
|
|
// ===============================================
|
|
// class ServerSocket
|
|
// ===============================================
|
|
|
|
void ServerSocket::bind(int port)
|
|
{
|
|
//sockaddr structure
|
|
sockaddr_in addr;
|
|
addr.sin_family= AF_INET;
|
|
addr.sin_addr.s_addr= INADDR_ANY;
|
|
addr.sin_port= htons(port);
|
|
|
|
int val = 1;
|
|
setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(val));
|
|
|
|
int err= ::bind(sock, reinterpret_cast<sockaddr*>(&addr), sizeof(addr));
|
|
if(err < 0)
|
|
{
|
|
char szBuf[1024]="";
|
|
sprintf(szBuf, "In [%s::%s] Error binding socket sock = %d, err = %d, errno = %d\n",__FILE__,__FUNCTION__,sock,err,errno);
|
|
throwException(szBuf);
|
|
}
|
|
}
|
|
|
|
void ServerSocket::listen(int connectionQueueSize)
|
|
{
|
|
int err= ::listen(sock, connectionQueueSize);
|
|
if(err < 0)
|
|
{
|
|
char szBuf[1024]="";
|
|
sprintf(szBuf, "In [%s::%s] Error listening socket sock = %d, err = %d, errno = %d\n",__FILE__,__FUNCTION__,sock,err,errno);
|
|
throwException(szBuf);
|
|
}
|
|
}
|
|
|
|
Socket *ServerSocket::accept()
|
|
{
|
|
int newSock= ::accept(sock, NULL, NULL);
|
|
if(newSock < 0)
|
|
{
|
|
char szBuf[1024]="";
|
|
if(Socket::enableNetworkDebugInfo) printf(szBuf, "In [%s::%s] Error accepting socket connection sock = %d, err = %d, errno = %d\n",__FILE__,__FUNCTION__,sock,newSock,errno);
|
|
|
|
if(errno == EAGAIN)
|
|
{
|
|
return NULL;
|
|
}
|
|
throwException(szBuf);
|
|
|
|
}
|
|
return new Socket(newSock);
|
|
}
|
|
|
|
|
|
}}//end namespace
|
|
|