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/*
* Unix socket protocol
* Copyright (c) 2013 Luca Barbato
*
* 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
*/
/**
* @file
*
* Unix socket url_protocol
*/
#include "libavutil/avstring.h"
#include "libavutil/opt.h"
#include "os_support.h"
#include "network.h"
#include <sys/un.h>
#include "url.h"
typedef struct UnixContext {
const AVClass *class;
struct sockaddr_un addr;
int timeout;
int listen;
int type;
int fd;
} UnixContext;
#define OFFSET(x) offsetof(UnixContext, x)
#define ED AV_OPT_FLAG_DECODING_PARAM|AV_OPT_FLAG_ENCODING_PARAM
static const AVOption unix_options[] = {
{ "listen", "Open socket for listening", OFFSET(listen), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, ED },
{ "timeout", "Timeout in ms", OFFSET(timeout), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, ED },
{ "type", "Socket type", OFFSET(type), AV_OPT_TYPE_INT, { .i64 = SOCK_STREAM }, INT_MIN, INT_MAX, ED, "type" },
{ "stream", "Stream (reliable stream-oriented)", 0, AV_OPT_TYPE_CONST, { .i64 = SOCK_STREAM }, INT_MIN, INT_MAX, ED, "type" },
{ "datagram", "Datagram (unreliable packet-oriented)", 0, AV_OPT_TYPE_CONST, { .i64 = SOCK_DGRAM }, INT_MIN, INT_MAX, ED, "type" },
{ "seqpacket", "Seqpacket (reliable packet-oriented", 0, AV_OPT_TYPE_CONST, { .i64 = SOCK_SEQPACKET }, INT_MIN, INT_MAX, ED, "type" },
{ NULL }
};
static const AVClass unix_class = {
.class_name = "unix",
.item_name = av_default_item_name,
.option = unix_options,
.version = LIBAVUTIL_VERSION_INT,
};
static int unix_open(URLContext *h, const char *filename, int flags)
{
UnixContext *s = h->priv_data;
int fd, ret;
av_strstart(filename, "unix:", &filename);
s->addr.sun_family = AF_UNIX;
av_strlcpy(s->addr.sun_path, filename, sizeof(s->addr.sun_path));
if ((fd = ff_socket(AF_UNIX, s->type, 0)) < 0)
return ff_neterrno();
if (s->timeout < 0 && h->rw_timeout)
s->timeout = h->rw_timeout / 1000;
if (s->listen) {
ret = ff_listen_bind(fd, (struct sockaddr *)&s->addr,
sizeof(s->addr), s->timeout, h);
if (ret < 0)
goto fail;
fd = ret;
} else {
ret = ff_listen_connect(fd, (struct sockaddr *)&s->addr,
sizeof(s->addr), s->timeout, h, 0);
if (ret < 0)
goto fail;
}
s->fd = fd;
return 0;
fail:
if (s->listen && AVUNERROR(ret) != EADDRINUSE)
unlink(s->addr.sun_path);
if (fd >= 0)
closesocket(fd);
return ret;
}
static int unix_read(URLContext *h, uint8_t *buf, int size)
{
UnixContext *s = h->priv_data;
int ret;
if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
ret = ff_network_wait_fd(s->fd, 0);
if (ret < 0)
return ret;
}
ret = recv(s->fd, buf, size, 0);
if (!ret && s->type == SOCK_STREAM)
return AVERROR_EOF;
return ret < 0 ? ff_neterrno() : ret;
}
static int unix_write(URLContext *h, const uint8_t *buf, int size)
{
UnixContext *s = h->priv_data;
int ret;
if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
ret = ff_network_wait_fd(s->fd, 1);
if (ret < 0)
return ret;
}
ret = send(s->fd, buf, size, MSG_NOSIGNAL);
return ret < 0 ? ff_neterrno() : ret;
}
static int unix_close(URLContext *h)
{
UnixContext *s = h->priv_data;
if (s->listen)
unlink(s->addr.sun_path);
closesocket(s->fd);
return 0;
}
static int unix_get_file_handle(URLContext *h)
{
UnixContext *s = h->priv_data;
return s->fd;
}
const URLProtocol ff_unix_protocol = {
.name = "unix",
.url_open = unix_open,
.url_read = unix_read,
.url_write = unix_write,
.url_close = unix_close,
.url_get_file_handle = unix_get_file_handle,
.priv_data_size = sizeof(UnixContext),
.priv_data_class = &unix_class,
.flags = URL_PROTOCOL_FLAG_NETWORK,
};
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