0,0 → 1,228 |
/* |
* 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 "libavutil/parseutils.h" |
#include "libavutil/opt.h" |
#include "libavutil/time.h" |
#include "internal.h" |
#include "network.h" |
#include "os_support.h" |
#include "url.h" |
#if HAVE_POLL_H |
#include <poll.h> |
#endif |
|
typedef struct TCPContext { |
const AVClass *class; |
int fd; |
int listen; |
int open_timeout; |
int rw_timeout; |
int listen_timeout; |
} 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 on port instead of connecting", OFFSET(listen), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E }, |
{"timeout", "timeout of socket i/o operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E }, |
{"listen_timeout", "connection awaiting timeout", OFFSET(listen_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E }, |
{NULL} |
}; |
|
static const AVClass tcp_context_class = { |
.class_name = "tcp", |
.item_name = av_default_item_name, |
.option = options, |
.version = LIBAVUTIL_VERSION_INT, |
}; |
|
/* return non zero if error */ |
static int tcp_open(URLContext *h, const char *uri, int flags) |
{ |
struct addrinfo hints = { 0 }, *ai, *cur_ai; |
int port, fd = -1; |
TCPContext *s = h->priv_data; |
const char *p; |
char buf[256]; |
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); |
if (strcmp(proto, "tcp")) |
return AVERROR(EINVAL); |
if (port <= 0 || port >= 65536) { |
av_log(h, AV_LOG_ERROR, "Port missing in uri\n"); |
return AVERROR(EINVAL); |
} |
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), "timeout", p)) { |
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->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); |
if (s->listen) |
hints.ai_flags |= AI_PASSIVE; |
if (!hostname[0]) |
ret = getaddrinfo(NULL, portstr, &hints, &ai); |
else |
ret = getaddrinfo(hostname, portstr, &hints, &ai); |
if (ret) { |
av_log(h, AV_LOG_ERROR, |
"Failed to resolve hostname %s: %s\n", |
hostname, gai_strerror(ret)); |
return AVERROR(EIO); |
} |
|
cur_ai = ai; |
|
restart: |
fd = ff_socket(cur_ai->ai_family, |
cur_ai->ai_socktype, |
cur_ai->ai_protocol); |
if (fd < 0) { |
ret = ff_neterrno(); |
goto fail; |
} |
|
if (s->listen) { |
if ((fd = ff_listen_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen, |
s->listen_timeout, h)) < 0) { |
ret = fd; |
goto fail1; |
} |
} else { |
if ((ret = ff_listen_connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen, |
s->open_timeout / 1000, h, !!cur_ai->ai_next)) < 0) { |
|
if (ret == AVERROR_EXIT) |
goto fail1; |
else |
goto fail; |
} |
} |
|
h->is_streamed = 1; |
s->fd = fd; |
freeaddrinfo(ai); |
return 0; |
|
fail: |
if (cur_ai->ai_next) { |
/* Retry with the next sockaddr */ |
cur_ai = cur_ai->ai_next; |
if (fd >= 0) |
closesocket(fd); |
ret = 0; |
goto restart; |
} |
fail1: |
if (fd >= 0) |
closesocket(fd); |
freeaddrinfo(ai); |
return ret; |
} |
|
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_timeout(s->fd, 0, h->rw_timeout, &h->interrupt_callback); |
if (ret) |
return ret; |
} |
ret = recv(s->fd, buf, size, 0); |
return ret < 0 ? ff_neterrno() : ret; |
} |
|
static int tcp_write(URLContext *h, const uint8_t *buf, int size) |
{ |
TCPContext *s = h->priv_data; |
int ret; |
|
if (!(h->flags & AVIO_FLAG_NONBLOCK)) { |
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, 0); |
return ret < 0 ? ff_neterrno() : ret; |
} |
|
static int tcp_shutdown(URLContext *h, int flags) |
{ |
TCPContext *s = h->priv_data; |
int how; |
|
if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) { |
how = SHUT_RDWR; |
} else if (flags & AVIO_FLAG_WRITE) { |
how = SHUT_WR; |
} else { |
how = SHUT_RD; |
} |
|
return shutdown(s->fd, how); |
} |
|
static int tcp_close(URLContext *h) |
{ |
TCPContext *s = h->priv_data; |
closesocket(s->fd); |
return 0; |
} |
|
static int tcp_get_file_handle(URLContext *h) |
{ |
TCPContext *s = h->priv_data; |
return s->fd; |
} |
|
URLProtocol ff_tcp_protocol = { |
.name = "tcp", |
.url_open = tcp_open, |
.url_read = tcp_read, |
.url_write = tcp_write, |
.url_close = tcp_close, |
.url_get_file_handle = tcp_get_file_handle, |
.url_shutdown = tcp_shutdown, |
.priv_data_size = sizeof(TCPContext), |
.priv_data_class = &tcp_context_class, |
.flags = URL_PROTOCOL_FLAG_NETWORK, |
}; |