* TCP protocol
* Copyright (c) 2002 Fabrice Bellard
*
- * This file is part of Libav.
+ * This file is part of FFmpeg.
*
- * Libav is free software; you can redistribute it and/or
+ * 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.
*
- * Libav is distributed in the hope that it will be useful,
+ * 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 Libav; if not, write to the Free Software
+ * 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 "libavutil/avassert.h"
#include "libavutil/parseutils.h"
#include "libavutil/opt.h"
+#include "libavutil/time.h"
#include "internal.h"
#include "network.h"
const AVClass *class;
int fd;
int listen;
- int timeout;
+ int open_timeout;
+ int rw_timeout;
int listen_timeout;
+ int recv_buffer_size;
+ int send_buffer_size;
+ int tcp_nodelay;
+#if !HAVE_WINSOCK2_H
+ int tcp_mss;
+#endif /* !HAVE_WINSOCK2_H */
} TCPContext;
#define OFFSET(x) offsetof(TCPContext, x)
#define D AV_OPT_FLAG_DECODING_PARAM
#define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
- { "listen", "Listen for incoming connections", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = D|E },
- { "timeout", "Connection timeout (in milliseconds)", OFFSET(timeout), AV_OPT_TYPE_INT, { .i64 = 0 }, INT_MIN, INT_MAX, .flags = D|E },
- { "listen_timeout", "Bind timeout (in milliseconds)", OFFSET(listen_timeout), AV_OPT_TYPE_INT, { .i64 = -1 }, INT_MIN, INT_MAX, .flags = D|E },
+ { "listen", "Listen for incoming connections", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 2, .flags = D|E },
+ { "timeout", "set timeout (in microseconds) of socket I/O operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
+ { "listen_timeout", "Connection awaiting timeout (in milliseconds)", OFFSET(listen_timeout), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
+ { "send_buffer_size", "Socket send buffer size (in bytes)", OFFSET(send_buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
+ { "recv_buffer_size", "Socket receive buffer size (in bytes)", OFFSET(recv_buffer_size), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
+ { "tcp_nodelay", "Use TCP_NODELAY to disable nagle's algorithm", OFFSET(tcp_nodelay), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, .flags = D|E },
+#if !HAVE_WINSOCK2_H
+ { "tcp_mss", "Maximum segment size for outgoing TCP packets", OFFSET(tcp_mss), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D|E },
+#endif /* !HAVE_WINSOCK2_H */
{ NULL }
};
.version = LIBAVUTIL_VERSION_INT,
};
+static void customize_fd(void *ctx, int fd)
+{
+ TCPContext *s = ctx;
+ /* Set the socket's send or receive buffer sizes, if specified.
+ If unspecified or setting fails, system default is used. */
+ if (s->recv_buffer_size > 0) {
+ if (setsockopt (fd, SOL_SOCKET, SO_RCVBUF, &s->recv_buffer_size, sizeof (s->recv_buffer_size))) {
+ ff_log_net_error(ctx, AV_LOG_WARNING, "setsockopt(SO_RCVBUF)");
+ }
+ }
+ if (s->send_buffer_size > 0) {
+ if (setsockopt (fd, SOL_SOCKET, SO_SNDBUF, &s->send_buffer_size, sizeof (s->send_buffer_size))) {
+ ff_log_net_error(ctx, AV_LOG_WARNING, "setsockopt(SO_SNDBUF)");
+ }
+ }
+ if (s->tcp_nodelay > 0) {
+ if (setsockopt (fd, IPPROTO_TCP, TCP_NODELAY, &s->tcp_nodelay, sizeof (s->tcp_nodelay))) {
+ ff_log_net_error(ctx, AV_LOG_WARNING, "setsockopt(TCP_NODELAY)");
+ }
+ }
+#if !HAVE_WINSOCK2_H
+ if (s->tcp_mss > 0) {
+ if (setsockopt (fd, IPPROTO_TCP, TCP_MAXSEG, &s->tcp_mss, sizeof (s->tcp_mss))) {
+ ff_log_net_error(ctx, AV_LOG_WARNING, "setsockopt(TCP_MAXSEG)");
+ }
+ }
+#endif /* !HAVE_WINSOCK2_H */
+}
+
/* return non zero if error */
static int tcp_open(URLContext *h, const char *uri, int flags)
{
int ret;
char hostname[1024],proto[1024],path[1024];
char portstr[10];
+ s->open_timeout = 5000000;
av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
&port, path, sizeof(path), uri);
}
p = strchr(uri, '?');
if (p) {
- if (av_find_info_tag(buf, sizeof(buf), "listen", p))
- s->listen = 1;
+ if (av_find_info_tag(buf, sizeof(buf), "listen", p)) {
+ char *endptr = NULL;
+ s->listen = strtol(buf, &endptr, 10);
+ /* assume if no digits were found it is a request to enable it */
+ if (buf == endptr)
+ s->listen = 1;
+ }
if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) {
- s->timeout = strtol(buf, NULL, 10) * 100;
+ s->rw_timeout = strtol(buf, NULL, 10);
}
if (av_find_info_tag(buf, sizeof(buf), "listen_timeout", p)) {
s->listen_timeout = strtol(buf, NULL, 10);
}
}
- if (!s->timeout)
- s->timeout = h->rw_timeout ? h->rw_timeout / 1000 : 10000;
- if (h->rw_timeout && s->listen_timeout < 0)
- s->listen_timeout = h->rw_timeout / 1000;
+ if (s->rw_timeout >= 0) {
+ s->open_timeout =
+ h->rw_timeout = s->rw_timeout;
+ }
hints.ai_family = AF_UNSPEC;
hints.ai_socktype = SOCK_STREAM;
snprintf(portstr, sizeof(portstr), "%d", port);
cur_ai = ai;
- if (s->listen) {
+#if HAVE_STRUCT_SOCKADDR_IN6
+ // workaround for IOS9 getaddrinfo in IPv6 only network use hardcode IPv4 address can not resolve port number.
+ if (cur_ai->ai_family == AF_INET6){
+ struct sockaddr_in6 * sockaddr_v6 = (struct sockaddr_in6 *)cur_ai->ai_addr;
+ if (!sockaddr_v6->sin6_port){
+ sockaddr_v6->sin6_port = htons(port);
+ }
+ }
+#endif
+
+ if (s->listen > 0) {
while (cur_ai && fd < 0) {
fd = ff_socket(cur_ai->ai_family,
cur_ai->ai_socktype,
}
if (fd < 0)
goto fail1;
+ customize_fd(s, fd);
+ }
+ if (s->listen == 2) {
+ // multi-client
+ if ((ret = ff_listen(fd, cur_ai->ai_addr, cur_ai->ai_addrlen)) < 0)
+ goto fail1;
+ } else if (s->listen == 1) {
+ // single client
if ((ret = ff_listen_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
- s->listen_timeout, h)) < 0) {
+ s->listen_timeout, h)) < 0)
goto fail1;
- }
+ // Socket descriptor already closed here. Safe to overwrite to client one.
fd = ret;
} else {
- ret = ff_connect_parallel(ai, s->timeout, 3, h, &fd, NULL, NULL);
+ ret = ff_connect_parallel(ai, s->open_timeout / 1000, 3, h, &fd, customize_fd, s);
if (ret < 0)
goto fail1;
}
h->is_streamed = 1;
s->fd = fd;
+
freeaddrinfo(ai);
return 0;
return ret;
}
+static int tcp_accept(URLContext *s, URLContext **c)
+{
+ TCPContext *sc = s->priv_data;
+ TCPContext *cc;
+ int ret;
+ av_assert0(sc->listen);
+ if ((ret = ffurl_alloc(c, s->filename, s->flags, &s->interrupt_callback)) < 0)
+ return ret;
+ cc = (*c)->priv_data;
+ ret = ff_accept(sc->fd, sc->listen_timeout, s);
+ if (ret < 0) {
+ ffurl_closep(c);
+ return ret;
+ }
+ cc->fd = ret;
+ return 0;
+}
+
static int tcp_read(URLContext *h, uint8_t *buf, int size)
{
TCPContext *s = h->priv_data;
int ret;
if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
- ret = ff_network_wait_fd(s->fd, 0);
- if (ret < 0)
+ ret = ff_network_wait_fd_timeout(s->fd, 0, h->rw_timeout, &h->interrupt_callback);
+ if (ret)
return ret;
}
ret = recv(s->fd, buf, size, 0);
+ if (ret == 0)
+ return AVERROR_EOF;
return ret < 0 ? ff_neterrno() : ret;
}
int ret;
if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
- ret = ff_network_wait_fd(s->fd, 1);
- if (ret < 0)
+ ret = ff_network_wait_fd_timeout(s->fd, 1, h->rw_timeout, &h->interrupt_callback);
+ if (ret)
return ret;
}
ret = send(s->fd, buf, size, MSG_NOSIGNAL);
return s->fd;
}
+static int tcp_get_window_size(URLContext *h)
+{
+ TCPContext *s = h->priv_data;
+ int avail;
+ socklen_t avail_len = sizeof(avail);
+
+#if HAVE_WINSOCK2_H
+ /* SO_RCVBUF with winsock only reports the actual TCP window size when
+ auto-tuning has been disabled via setting SO_RCVBUF */
+ if (s->recv_buffer_size < 0) {
+ return AVERROR(ENOSYS);
+ }
+#endif
+
+ if (getsockopt(s->fd, SOL_SOCKET, SO_RCVBUF, &avail, &avail_len)) {
+ return ff_neterrno();
+ }
+ return avail;
+}
+
const URLProtocol ff_tcp_protocol = {
.name = "tcp",
.url_open = tcp_open,
+ .url_accept = tcp_accept,
.url_read = tcp_read,
.url_write = tcp_write,
.url_close = tcp_close,
.url_get_file_handle = tcp_get_file_handle,
+ .url_get_short_seek = tcp_get_window_size,
.url_shutdown = tcp_shutdown,
.priv_data_size = sizeof(TCPContext),
.flags = URL_PROTOCOL_FLAG_NETWORK,
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