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/*
* TCP protocol
* Copyright (c) 2002 Fabrice Bellard.
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#include <unistd.h>
#include "network.h"
#include <sys/time.h>
#include <fcntl.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)) {
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 = NULL;
fd_set wfds;
int fd_max, ret;
struct timeval tv;
socklen_t optlen;
char proto[1024],path[1024],tmp[1024]; // PETR: protocol and path strings
url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
&port, path, sizeof(path), uri); // PETR: use url_split
if (strcmp(proto,"tcp")) goto fail; // PETR: check protocol
if ((q = strchr(hostname,'@'))) { strcpy(tmp,q+1); strcpy(hostname,tmp); } // PETR: take only the part after '@' for tcp protocol
s = av_malloc(sizeof(TCPContext));
if (!s)
return AVERROR(ENOMEM);
h->priv_data = s;
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(AF_INET, SOCK_STREAM, 0);
if (fd < 0)
goto fail;
fcntl(fd, F_SETFL, O_NONBLOCK);
redo:
ret = connect(fd, (struct sockaddr *)&dest_addr,
sizeof(dest_addr));
if (ret < 0) {
if (errno == EINTR)
goto redo;
if (errno != EINPROGRESS)
goto fail;
/* wait until we are connected or until abort */
for(;;) {
if (url_interrupt_cb()) {
ret = AVERROR(EINTR);
goto fail1;
}
fd_max = fd;
FD_ZERO(&wfds);
FD_SET(fd, &wfds);
tv.tv_sec = 0;
tv.tv_usec = 100 * 1000;
ret = select(fd_max + 1, NULL, &wfds, NULL, &tv);
if (ret > 0 && FD_ISSET(fd, &wfds))
break;
}
/* test error */
optlen = sizeof(ret);
getsockopt (fd, SOL_SOCKET, SO_ERROR, &ret, &optlen);
if (ret != 0)
goto fail;
}
s->fd = fd;
return 0;
fail:
ret = AVERROR_IO;
fail1:
if (fd >= 0)
closesocket(fd);
av_free(s);
return ret;
}
static int tcp_read(URLContext *h, uint8_t *buf, int size)
{
TCPContext *s = h->priv_data;
int len, fd_max, ret;
fd_set rfds;
struct timeval tv;
for (;;) {
if (url_interrupt_cb())
return AVERROR(EINTR);
fd_max = s->fd;
FD_ZERO(&rfds);
FD_SET(s->fd, &rfds);
tv.tv_sec = 0;
tv.tv_usec = 100 * 1000;
ret = select(fd_max + 1, &rfds, NULL, NULL, &tv);
if (ret > 0 && FD_ISSET(s->fd, &rfds)) {
len = recv(s->fd, buf, size, 0);
if (len < 0) {
if (errno != EINTR && errno != EAGAIN)
return AVERROR(errno);
} else return len;
} else if (ret < 0) {
return -1;
}
}
}
static int tcp_write(URLContext *h, uint8_t *buf, int size)
{
TCPContext *s = h->priv_data;
int ret, size1, fd_max, len;
fd_set wfds;
struct timeval tv;
size1 = size;
while (size > 0) {
if (url_interrupt_cb())
return AVERROR(EINTR);
fd_max = s->fd;
FD_ZERO(&wfds);
FD_SET(s->fd, &wfds);
tv.tv_sec = 0;
tv.tv_usec = 100 * 1000;
ret = select(fd_max + 1, NULL, &wfds, NULL, &tv);
if (ret > 0 && FD_ISSET(s->fd, &wfds)) {
len = send(s->fd, buf, size, 0);
if (len < 0) {
if (errno != EINTR && errno != EAGAIN)
return AVERROR(errno);
continue;
}
size -= len;
buf += len;
} else if (ret < 0) {
return -1;
}
}
return size1 - size;
}
static int tcp_close(URLContext *h)
{
TCPContext *s = h->priv_data;
closesocket(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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