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/*
* TCP protocol
* Copyright (c) 2002 Fabrice Bellard.
*
* 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 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
*/
#include "avformat.h"
#include <unistd.h>
#include <ctype.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <netdb.h>
typedef struct TCPContext {
int fd;
} TCPContext;
/* resolve host with also IP address parsing */
int resolve_host(struct in_addr *sin_addr, const char *hostname)
{
struct hostent *hp;
if ((inet_aton(hostname, sin_addr)) == 0) {
hp = gethostbyname(hostname);
if (!hp)
return -1;
memcpy (sin_addr, hp->h_addr, sizeof(struct in_addr));
}
return 0;
}
/* return non zero if error */
static int tcp_open(URLContext *h, const char *uri, int flags)
{
struct sockaddr_in dest_addr;
char hostname[1024], *q;
int port, fd = -1;
TCPContext *s;
const char *p;
s = av_malloc(sizeof(TCPContext));
if (!s)
return -ENOMEM;
h->priv_data = s;
p = uri;
if (!strstart(p, "tcp://", &p))
goto fail;
q = hostname;
while (*p != ':' && *p != '/' && *p != '\0') {
if ((q - hostname) < sizeof(hostname) - 1)
*q++ = *p;
p++;
}
*q = '\0';
if (*p != ':')
goto fail;
p++;
port = strtoul(p, (char **)&p, 10);
if (port <= 0 || port >= 65536)
goto fail;
dest_addr.sin_family = AF_INET;
dest_addr.sin_port = htons(port);
if (resolve_host(&dest_addr.sin_addr, hostname) < 0)
goto fail;
fd = socket(PF_INET, SOCK_STREAM, 0);
if (fd < 0)
goto fail;
if (connect(fd, (struct sockaddr *)&dest_addr,
sizeof(dest_addr)) < 0)
goto fail;
s->fd = fd;
return 0;
fail:
if (fd >= 0)
close(fd);
av_free(s);
return -EIO;
}
static int tcp_read(URLContext *h, UINT8 *buf, int size)
{
TCPContext *s = h->priv_data;
int size1, len;
size1 = size;
while (size > 0) {
len = read (s->fd, buf, size);
if (len < 0) {
if (errno != EINTR && errno != EAGAIN)
return -errno;
else
continue;
} else if (len == 0) {
break;
}
size -= len;
buf += len;
}
return size1 - size;
}
static int tcp_write(URLContext *h, UINT8 *buf, int size)
{
TCPContext *s = h->priv_data;
int ret, size1;
size1 = size;
while (size > 0) {
ret = write (s->fd, buf, size);
if (ret < 0 && errno != EINTR && errno != EAGAIN)
return -errno;
size -= ret;
buf += ret;
}
return size1 - size;
}
static int tcp_close(URLContext *h)
{
TCPContext *s = h->priv_data;
close(s->fd);
av_free(s);
return 0;
}
URLProtocol tcp_protocol = {
"tcp",
tcp_open,
tcp_read,
tcp_write,
NULL, /* seek */
tcp_close,
};
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