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#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <errno.h>
#include <fcntl.h>
#include "socket.h"
#include "exceptions.h"
#define RBS (1024*2)
Bu::Socket::Socket( int nSocket ) :
nSocket( nSocket ),
bActive( true )
{
}
Bu::Socket::Socket( const Bu::FString &sAddr, int nPort, int nTimeout )
{
struct sockaddr_in xServerName;
bActive = false;
/* Create the socket. */
nSocket = socket( PF_INET, SOCK_STREAM, 0 );
if( nSocket < 0 )
{
throw ExceptionBase("Couldn't create socket.\n");
}
// These lines set the socket to non-blocking, a good thing?
int flags;
flags = fcntl(nSocket, F_GETFL, 0);
flags |= O_NONBLOCK;
if (fcntl(nSocket, F_SETFL, flags) < 0)
{
throw ExceptionBase("Couldn't set socket options.\n");
}
/* Connect to the server. */
//printf("Resolving hostname (%s)...\n", sAddr );
{
struct hostent *hostinfo;
xServerName.sin_family = AF_INET;
xServerName.sin_port = htons( nPort );
hostinfo = gethostbyname( sAddr.getStr() );
if (hostinfo == NULL)
{
throw ExceptionBase("Couldn't resolve hostname.\n");
}
xServerName.sin_addr = *(struct in_addr *) hostinfo->h_addr;
}
//printf("Making actual connection...");
//fflush( stdout );
connect(
nSocket,
(struct sockaddr *)&xServerName,
sizeof(xServerName)
);
//printf("Connected.\n");
bActive = true;
if( nTimeout > 0 )
{
fd_set rfds, wfds, efds;
int retval;
FD_ZERO(&rfds);
FD_SET(nSocket, &rfds);
FD_ZERO(&wfds);
FD_SET(nSocket, &wfds);
FD_ZERO(&efds);
FD_SET(nSocket, &efds);
struct timeval tv;
tv.tv_sec = nTimeout;
tv.tv_usec = 0;
retval = select( nSocket+1, &rfds, &wfds, &efds, &tv );
if( retval == 0 )
{
close();
throw ExceptionBase("Connection timeout.\n");
}
}
}
Bu::Socket::~Socket()
{
}
void Bu::Socket::close()
{
if( bActive )
{
fsync( nSocket );
::close( nSocket );
}
bActive = false;
//xInputBuf.clearData();
//xOutputBuf.clearData();
//if( pProtocol != NULL )
//{
// delete pProtocol;
// pProtocol = NULL;
//}
}
void Bu::Socket::read()
{
char buffer[RBS];
int nbytes;
int nTotalRead=0;
for(;;)
{
//memset( buffer, 0, RBS );
nbytes = ::read( nSocket, buffer, RBS );
if( nbytes < 0 && errno != 0 && errno != EAGAIN )
{
//printf("errno: %d, %s\n", errno, strerror( errno ) );
/* Read error. */
//perror("readInput");
throw ConnectionException(
excodeReadError,
"Read error: %s",
strerror( errno )
);
}
else
{
if( nbytes <= 0 )
break;
nTotalRead += nbytes;
sReadBuf.append( buffer, nbytes );
/* Data read. */
if( nbytes < RBS )
{
break;
}
/* New test, if data is divisible by RBS bytes on some libs the
* read could block, this keeps it from happening.
*/
{
fd_set rfds;
FD_ZERO(&rfds);
FD_SET(nSocket, &rfds);
struct timeval tv = { 0, 0 };
int retval = select( nSocket+1, &rfds, NULL, NULL, &tv );
if( retval == -1 )
throw ConnectionException(
excodeBadReadError,
"Bad Read error"
);
if( !FD_ISSET( nSocket, &rfds ) )
break;
}
}
}
/*
if( pProtocol != NULL && nTotalRead > 0 )
{
pProtocol->onNewData();
}*/
}
size_t Bu::Socket::read( void *pBuf, size_t nBytes )
{
read();
return sReadBuf.getSize();
}
size_t Bu::Socket::write( const void *pBuf, size_t nBytes )
{
int nWrote = TEMP_FAILURE_RETRY( ::write( nSocket, pBuf, nBytes ) );
if( nWrote < 0 )
{
throw ConnectionException( excodeWriteError, strerror(errno) );
}
return nWrote;
}
long Bu::Socket::tell()
{
throw UnsupportedException();
}
void Bu::Socket::seek( long offset )
{
throw UnsupportedException();
}
void Bu::Socket::setPos( long pos )
{
throw UnsupportedException();
}
void Bu::Socket::setPosEnd( long pos )
{
throw UnsupportedException();
}
bool Bu::Socket::isEOS()
{
return !bActive;
}
bool Bu::Socket::canRead()
{
return true;
}
bool Bu::Socket::canWrite()
{
return true;
}
bool Bu::Socket::canSeek()
{
return false;
}
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