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/*
* Copyright (C) 2000-2003 the xine project,
*
* This file is part of xine, a free video player.
*
* xine 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.
*
* xine 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
*
* abortable i/o helper functions
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#include <errno.h>
#include <string.h>
#include <assert.h>
#include "io_helper.h"
/* private constants */
#define XIO_FILE_READ 0
#define XIO_FILE_WRITE 1
#define XIO_TCP_READ 2
#define XIO_TCP_WRITE 3
#define XIO_POLLING_INTERVAL 50000 /* usec */
int xio_tcp_connect(xine_stream_t *stream, const char *host, int port) {
struct hostent *h;
int i, s;
h = gethostbyname(host);
if (h == NULL) {
xine_message(stream, XINE_MSG_UNKNOWN_HOST, "unable to resolve", host, NULL);
return -1;
}
s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (s == -1) {
xine_message(stream, XINE_MSG_CONNECTION_REFUSED, "failed to create socket", strerror(errno), NULL);
return -1;
}
#ifndef _MSC_VER
if (fcntl (s, F_SETFL, fcntl (s, F_GETFL) | O_NONBLOCK) == -1) {
xine_message(stream, XINE_MSG_CONNECTION_REFUSED, "can't put socket in non-blocking mode", strerror(errno), NULL);
return -1;
}
#else
{
int non_block = 1;
int rc;
rc = ioctlsocket(s, FIONBIO, &non_block);
if (rc == SOCKET_ERROR) {
xine_message(stream, XINE_MSG_CONNECTION_REFUSED, "can't put socket in non-blocking mode", strerror(errno), NULL);
return -1;
}
}
#endif
for (i = 0; h->h_addr_list[i]; i++) {
struct in_addr ia;
struct sockaddr_in sin;
memcpy (&ia, h->h_addr_list[i], 4);
sin.sin_family = AF_INET;
sin.sin_addr = ia;
sin.sin_port = htons(port);
#ifndef WIN32
if (connect(s, (struct sockaddr *)&sin, sizeof(sin))==-1 && errno != EINPROGRESS) {
#else
if (connect(s, (struct sockaddr *)&sin, sizeof(sin))==-1 && WSAGetLastError() != WSAEWOULDBLOCK) {
printf("io_helper: WSAGetLastError() = %d\n", WSAGetLastError());
#endif /* WIN32 */
xine_message(stream, XINE_MSG_CONNECTION_REFUSED, strerror(errno), NULL);
close(s);
continue;
}
return s;
}
return -1;
}
int xio_select (xine_stream_t *stream, int fd, int state, int timeout_msec) {
fd_set fdset;
fd_set *rset, *wset;
struct timeval select_timeout;
int timeout_usec, total_time_usec;
int ret;
timeout_usec = 1000 * timeout_msec;
total_time_usec = 0;
while (total_time_usec < timeout_usec) {
FD_ZERO (&fdset);
FD_SET (fd, &fdset);
select_timeout.tv_sec = 0;
select_timeout.tv_usec = XIO_POLLING_INTERVAL;
rset = (state & XIO_READ_READY) ? &fdset : NULL;
wset = (state & XIO_WRITE_READY) ? &fdset : NULL;
ret = select (fd + 1, rset, wset, NULL, &select_timeout);
if (ret == -1) {
/* select error */
return XIO_ERROR;
} else if (ret == 1) {
/* fd is ready */
return XIO_READY;
}
/* select timeout
* aborts current read if action pending. otherwise xine
* cannot be stopped when no more data is available.
*/
if (stream->demux_action_pending)
return XIO_ABORTED;
total_time_usec += XIO_POLLING_INTERVAL;
}
return XIO_TIMEOUT;
}
static off_t xio_rw_abort(xine_stream_t *stream, int fd, int cmd, char *buf, off_t todo) {
off_t ret = -1;
off_t total = 0;
int sret;
int state = 0;
if ((cmd == XIO_TCP_READ) || (cmd == XIO_FILE_READ)) {
state = XIO_READ_READY;
} else {
state = XIO_WRITE_READY;
}
while (total < todo) {
do {
sret = xio_select(stream, fd, state, 500); /* 500 ms */
} while (sret == XIO_TIMEOUT);
if (sret != XIO_READY)
return -1;
switch (cmd) {
case XIO_FILE_READ:
ret = read(fd, &buf[total], todo - total);
break;
case XIO_FILE_WRITE:
ret = write(fd, &buf[total], todo - total);
break;
case XIO_TCP_READ:
ret = recv(fd, &buf[total], todo - total, 0);
break;
case XIO_TCP_WRITE:
ret = send(fd, &buf[total], todo - total, 0);
break;
default:
assert(1);
}
/* check EOF */
if (!ret)
break;
/* check errors */
if (ret < 0) {
/* non-blocking mode */
#ifndef WIN32
if (errno == EAGAIN)
continue;
perror("io_helper: I/O error");
#else
if (WSAGetLastError() == WSAEWOULDBLOCK)
continue;
printf("io_helper: WSAGetLastError() = %d\n", WSAGetLastError());
#endif
return ret;
}
total += ret;
}
return total;
}
off_t xio_tcp_read (xine_stream_t *stream, int s, char *buf, off_t todo) {
return xio_rw_abort (stream, s, XIO_TCP_READ, buf, todo);
}
off_t xio_tcp_write (xine_stream_t *stream, int s, char *buf, off_t todo) {
return xio_rw_abort (stream, s, XIO_TCP_WRITE, buf, todo);
}
off_t xio_file_read (xine_stream_t *stream, int s, char *buf, off_t todo) {
return xio_rw_abort (stream, s, XIO_FILE_READ, buf, todo);
}
off_t xio_file_write (xine_stream_t *stream, int s, char *buf, off_t todo) {
return xio_rw_abort (stream, s, XIO_FILE_WRITE, buf, todo);
}
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