wsocket.cpp
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- // ------------------------------------------------
// File : wsocket.cpp
// Date: 4-apr-2002
// Author: giles
// Desc:
// Windows version of ClientSocket. Handles the nitty gritty of actually
// reading and writing TCP
//
// (c) 2002 peercast.org
// ------------------------------------------------
// 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.
// ------------------------------------------------
- // TODO: fix socket closing
-
-
#include "winsock2.h"
- #include <windows.h>
#include <stdio.h>
#include "wsocket.h"
#include "stats.h"
- // --------------------------------------------------
- void WSAClientSocket::init()
- {
- WORD wVersionRequested;
- WSADATA wsaData;
- int err;
-
- wVersionRequested = MAKEWORD( 2, 0 );
- err = WSAStartup( wVersionRequested, &wsaData );
- if ( err != 0 )
throw SockException("Unable to init sockets");
//LOG4("WSAStartup: OK");
}
// --------------------------------------------------
bool ClientSocket::getHostname(char *str,unsigned int ip)
{
HOSTENT *he;
ip = htonl(ip);
he = gethostbyaddr((char *)&ip,sizeof(ip),AF_INET);
if (he)
{
strcpy(str,he->h_name);
return true;
}else
return false;
}
// --------------------------------------------------
unsigned int ClientSocket::getIP(char *name)
{
char szHostName[256];
if (!name)
{
if (gethostname(szHostName, sizeof(szHostName))==0)
name = szHostName;
else
return 0;
}
HOSTENT *he = WSAClientSocket::resolveHost(name);
if (!he)
return 0;
LPSTR lpAddr = he->h_addr_list[0];
if (lpAddr)
{
struct in_addr inAddr;
memmove (&inAddr, lpAddr, 4);
return inAddr.S_un.S_un_b.s_b1<<24 |
inAddr.S_un.S_un_b.s_b2<<16 |
inAddr.S_un.S_un_b.s_b3<<8 |
inAddr.S_un.S_un_b.s_b4;
}
return 0;
}
// --------------------------------------------------
- void WSAClientSocket::setLinger(int sec)
- {
- linger linger;
- linger.l_onoff = (sec>0)?1:0;
- linger.l_linger = sec;
- if (setsockopt(sockNum, SOL_SOCKET, SO_LINGER, (const char *)&linger, sizeof (linger)) == -1)
- throw SockException("Unable to set LINGER");
- }
- // --------------------------------------------------
void WSAClientSocket::setBlocking(bool yes)
{
unsigned long op = yes ? 0 : 1;
if (ioctlsocket(sockNum, FIONBIO, &op) == SOCKET_ERROR)
throw SockException("Can`t set blocking");
}
// --------------------------------------------------
void WSAClientSocket::setNagle(bool on)
{
int nodelay = (on==false);
if (setsockopt(sockNum, SOL_SOCKET, TCP_NODELAY, (char *)&nodelay, sizeof nodelay) == -1)
throw SockException("Unable to set NODELAY");
}
// --------------------------------------------------
void WSAClientSocket::setReuse(bool yes)
{
unsigned long op = yes ? 1 : 0;
if (setsockopt(sockNum,SOL_SOCKET,SO_REUSEADDR,(char *)&op,sizeof(unsigned long)) == -1)
throw SockException("Unable to set REUSE");
}
// --------------------------------------------------
HOSTENT *WSAClientSocket::resolveHost(const char *hostName)
{
HOSTENT *he;
if ((he = gethostbyname(hostName)) == NULL)
{
// if failed, try using gethostbyaddr instead
unsigned long ip = inet_addr(hostName);
if (ip == INADDR_NONE)
return NULL;
if ((he = gethostbyaddr((char *)&ip,sizeof(ip),AF_INET)) == NULL)
return NULL;
}
return he;
}
// --------------------------------------------------
void WSAClientSocket::open(Host &rh)
{
sockNum = socket (AF_INET, SOCK_STREAM, IPPROTO_TCP);
if (sockNum == INVALID_SOCKET)
throw SockException("Can`t open socket");
setBlocking(false);
#ifdef DISABLE_NAGLE
setNagle(false);
#endif
host = rh;
memset(&remoteAddr,0,sizeof(remoteAddr));
remoteAddr.sin_family = AF_INET;
remoteAddr.sin_port = htons(host.port);
remoteAddr.sin_addr.S_un.S_addr = htonl(host.ip);
}
// --------------------------------------------------
void WSAClientSocket::checkTimeout(bool r, bool w)
{
int err = WSAGetLastError();
if (err == WSAEWOULDBLOCK)
{
- timeval timeout;
fd_set read_fds;
fd_set write_fds;
- timeout.tv_sec = 0;
- timeout.tv_usec = 0;
- FD_ZERO (&write_fds);
- if (w)
- {
- timeout.tv_sec = (int)this->writeTimeout/1000;
- FD_SET (sockNum, &write_fds);
- }
- FD_ZERO (&read_fds);
- if (r)
- {
- timeout.tv_sec = (int)this->readTimeout/1000;
- FD_SET (sockNum, &read_fds);
- }
- timeval *tp;
- if (timeout.tv_sec)
- tp = &timeout;
- else
- tp = NULL;
-
int r=select (NULL, &read_fds, &write_fds, NULL, tp);
if (r == 0)
- throw TimeoutException();
- else if (r == SOCKET_ERROR)
throw SockException("select failed.");
}else{
char str[32];
sprintf(str,"%d",err);
throw SockException(str);
}
- }
- // --------------------------------------------------
- void WSAClientSocket::checkTimeout2(bool r, bool w)
- {
- {
- timeval timeout;
- fd_set read_fds;
- fd_set write_fds;
- timeout.tv_sec = 0;
- timeout.tv_usec = 0;
- FD_ZERO (&write_fds);
- if (w)
- {
- timeout.tv_sec = (int)this->writeTimeout/1000;
- FD_SET (sockNum, &write_fds);
- }
- FD_ZERO (&read_fds);
- if (r)
- {
- timeout.tv_sec = (int)this->readTimeout/1000;
- FD_SET (sockNum, &read_fds);
- }
- timeval *tp;
- if (timeout.tv_sec)
- tp = &timeout;
- else
- tp = NULL;
- int r=select (NULL, &read_fds, &write_fds, NULL, tp);
- if (r == 0)
- throw TimeoutException();
- else if (r == SOCKET_ERROR)
- throw SockException("select failed.");
- }
- }
- // --------------------------------------------------
Host WSAClientSocket::getLocalHost()
{
struct sockaddr_in localAddr;
int len = sizeof(localAddr);
if (getsockname(sockNum, (sockaddr *)&localAddr, &len) == 0)
return Host(SWAP4(localAddr.sin_addr.s_addr),0);
else
return Host(0,0);
}
// --------------------------------------------------
void WSAClientSocket::connect()
{
if (::connect(sockNum,(struct sockaddr *)&remoteAddr,sizeof(remoteAddr)) == SOCKET_ERROR)
checkTimeout(false,true);
}
// --------------------------------------------------
int WSAClientSocket::read(void *p, int l)
{
- int bytesRead=0;
while (l)
{
int r = recv(sockNum, (char *)p, l, 0);
if (r == SOCKET_ERROR)
{
- // non-blocking sockets always fall through to here
- checkTimeout(true,false);
-
}else if (r == 0)
{
- throw EOFException("Closed on read");
- }else
{
stats.add(Stats::BYTESIN,r);
if (host.localIP())
stats.add(Stats::LOCALBYTESIN,r);
updateTotals(r,0);
bytesRead += r;
l -= r;
p = (char *)p+r;
}
- }
return bytesRead;
}
// --------------------------------------------------
- int WSAClientSocket::readUpto(void *p, int l)
- {
- int bytesRead=0;
- while (l)
- {
- int r = recv(sockNum, (char *)p, l, 0);
- if (r == SOCKET_ERROR)
- {
- // non-blocking sockets always fall through to here
- checkTimeout(true,false);
- }else if (r == 0)
- {
- break;
- }else
- {
- stats.add(Stats::BYTESIN,r);
- if (host.localIP())
- stats.add(Stats::LOCALBYTESIN,r);
- updateTotals(r,0);
- bytesRead += r;
- l -= r;
- p = (char *)p+r;
- }
- }
- return bytesRead;
- }
-
// --------------------------------------------------
void WSAClientSocket::write(const void *p, int l)
{
while (l)
{
int r = send(sockNum, (char *)p, l, 0);
- if (r == SOCKET_ERROR)
{
- checkTimeout(false,true);
- }
- else if (r == 0)
{
throw SockException("Closed on write");
}
- else
- if (r > 0)
{
- stats.add(Stats::BYTESOUT,r);
if (host.localIP())
stats.add(Stats::LOCALBYTESOUT,r);
updateTotals(0,r);
l -= r;
p = (char *)p+r;
- }
}
- }
// --------------------------------------------------
void WSAClientSocket::bind(Host &h)
{
struct sockaddr_in localAddr;
if ((sockNum = socket (PF_INET, SOCK_STREAM, IPPROTO_TCP)) == -1)
throw SockException("Can`t open socket");
setBlocking(false);
- setReuse(true);
memset(&localAddr,0,sizeof(localAddr));
localAddr.sin_family = AF_INET;
localAddr.sin_port = htons(h.port);
localAddr.sin_addr.s_addr = INADDR_ANY;
if( ::bind (sockNum, (sockaddr *)&localAddr, sizeof(localAddr)) == -1)
throw SockException("Can`t bind socket");
if (::listen(sockNum,SOMAXCONN))
throw SockException("Can`t listen",WSAGetLastError());
host = h;
}
// --------------------------------------------------
ClientSocket *WSAClientSocket::accept()
{
int fromSize = sizeof(sockaddr_in);
sockaddr_in from;
int conSock = ::accept(sockNum,(sockaddr *)&from,&fromSize);
if (conSock == INVALID_SOCKET)
return NULL;
WSAClientSocket *cs = new WSAClientSocket();
cs->sockNum = conSock;
cs->host.port = from.sin_port;
cs->host.ip = from.sin_addr.S_un.S_un_b.s_b1<<24 |
from.sin_addr.S_un.S_un_b.s_b2<<16 |
from.sin_addr.S_un.S_un_b.s_b3<<8 |
from.sin_addr.S_un.S_un_b.s_b4;
cs->setBlocking(false);
#ifdef DISABLE_NAGLE
cs->setNagle(false);
#endif
return cs;
}
// --------------------------------------------------
void WSAClientSocket::close()
{
if (sockNum)
{
- shutdown(sockNum,SD_SEND);
- setReadTimeout(2000);
- try
- {
- //char c;
- //while (readUpto(&c,1)!=0);
- //readUpto(&c,1);
- }catch(StreamException &) {}
- if (closesocket(sockNum))
- LOG_ERROR("closesocket() error");
-
- sockNum=0;
}
}
- // --------------------------------------------------
- bool WSAClientSocket::readReady()
- {
- timeval timeout;
- fd_set read_fds;
- timeout.tv_sec = 0;
- timeout.tv_usec = 0;
- FD_ZERO (&read_fds);
- FD_SET (sockNum, &read_fds);
- return select (sockNum+1, &read_fds, NULL, NULL, &timeout) == 1;
- }
-