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/*
* valerie_socket.c -- Client Socket
* Copyright (C) 2002-2003 Ushodaya Enterprises Limited
* Author: Charles Yates <charles.yates@pandora.be>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
/* System header files */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <netdb.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <fcntl.h>
#include <errno.h>
#include <netinet/in.h>
#include <sys/time.h>
/* Application header files */
#include "valerie_socket.h"
/** Initialise the socket.
*/
valerie_socket valerie_socket_init( char *server, int port )
{
valerie_socket socket = malloc( sizeof( valerie_socket_t ) );
if ( socket != NULL )
{
memset( socket, 0, sizeof( valerie_socket_t ) );
socket->fd = -1;
socket->server = strdup( server );
socket->port = port;
}
return socket;
}
/** Connect to the server.
*/
int valerie_socket_connect( valerie_socket connection )
{
int ret = 0;
struct hostent *host;
struct sockaddr_in sock;
if ( connection->server != NULL )
{
host = gethostbyname( connection->server );
memset( &sock, 0, sizeof( struct sockaddr_in ) );
memcpy( &sock.sin_addr, host->h_addr, host->h_length );
sock.sin_family = host->h_addrtype;
sock.sin_port = htons( connection->port );
if ( ( connection->fd = socket( AF_INET, SOCK_STREAM, 0 ) ) != -1 )
ret = connect( connection->fd, (const struct sockaddr *)&sock, sizeof( struct sockaddr_in ) );
else
ret = -1;
}
return ret;
}
/** Convenience constructor for a connected file descriptor.
*/
valerie_socket valerie_socket_init_fd( int fd )
{
valerie_socket socket = malloc( sizeof( valerie_socket_t ) );
if ( socket != NULL )
{
memset( socket, 0, sizeof( valerie_socket_t ) );
socket->fd = fd;
socket->no_close = 1;
}
return socket;
}
/** Read an arbitrarily formatted block of data from the server.
*/
int valerie_socket_read_data( valerie_socket socket, char *data, int length )
{
struct timeval tv = { 1, 0 };
fd_set rfds;
int used = 0;
data[ 0 ] = '\0';
FD_ZERO( &rfds );
FD_SET( socket->fd, &rfds );
if ( select( socket->fd + 1, &rfds, NULL, NULL, &tv ) )
{
used = read( socket->fd, data, length - 1 );
if ( used > 0 )
data[ used ] = '\0';
else
used = -1;
}
return used;
}
/** Write an arbitrarily formatted block of data to the server.
*/
int valerie_socket_write_data( valerie_socket socket, const char *data, int length )
{
int used = 0;
while ( used >=0 && used < length )
{
struct timeval tv = { 1, 0 };
fd_set rfds;
fd_set wfds;
fd_set efds;
FD_ZERO( &rfds );
FD_SET( socket->fd, &rfds );
FD_ZERO( &wfds );
FD_SET( socket->fd, &wfds );
FD_ZERO( &efds );
FD_SET( socket->fd, &efds );
errno = 0;
if ( select( socket->fd + 1, &rfds, &wfds, &efds, &tv ) )
{
if ( errno != 0 || FD_ISSET( socket->fd, &efds ) || FD_ISSET( socket->fd, &rfds ) )
{
used = -1;
}
else if ( FD_ISSET( socket->fd, &wfds ) )
{
int inc = write( socket->fd, data + used, length - used );
if ( inc > 0 )
used += inc;
else
used = -1;
}
}
}
return used;
}
/** Close the socket.
*/
void valerie_socket_close( valerie_socket socket )
{
if ( socket->fd > 0 && !socket->no_close )
close( socket->fd );
free( socket->server );
free( socket );
}
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