[deb_ffmpeg.git] / ffmpeg / libavformat / tcp.c

/*
 * 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 for incoming connections",  OFFSET(listen),         AV_OPT_TYPE_INT, { .i64 = 0 },     0,       1,       .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",      OFFSET(listen_timeout), AV_OPT_TYPE_INT, { .i64 = -1 },         -1, INT_MAX, .flags = D|E },
    { NULL }
};

static const AVClass tcp_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)) {
            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->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, MSG_NOSIGNAL);
    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),
    .flags               = URL_PROTOCOL_FLAG_NETWORK,
    .priv_data_class     = &tcp_class,
};
Commit	Line	Data
2ba45a60 DM	1	/*
	2	* TCP protocol
	3	* Copyright (c) 2002 Fabrice Bellard
	4	*
	5	* This file is part of FFmpeg.
	6	*
	7	* FFmpeg is free software; you can redistribute it and/or
	8	* modify it under the terms of the GNU Lesser General Public
	9	* License as published by the Free Software Foundation; either
	10	* version 2.1 of the License, or (at your option) any later version.
	11	*
	12	* FFmpeg is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	15	* Lesser General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU Lesser General Public
	18	* License along with FFmpeg; if not, write to the Free Software
	19	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
	20	*/
	21	#include "avformat.h"
	22	#include "libavutil/parseutils.h"
	23	#include "libavutil/opt.h"
	24	#include "libavutil/time.h"
f6fa7814	25
2ba45a60 DM	26	#include "internal.h"
	27	#include "network.h"
	28	#include "os_support.h"
	29	#include "url.h"
	30	#if HAVE_POLL_H
	31	#include <poll.h>
	32	#endif
	33
	34	typedef struct TCPContext {
	35	const AVClass *class;
	36	int fd;
	37	int listen;
	38	int open_timeout;
	39	int rw_timeout;
	40	int listen_timeout;
	41	} TCPContext;
	42
	43	#define OFFSET(x) offsetof(TCPContext, x)
	44	#define D AV_OPT_FLAG_DECODING_PARAM
	45	#define E AV_OPT_FLAG_ENCODING_PARAM
	46	static const AVOption options[] = {
f6fa7814 DM	47	{ "listen", "Listen for incoming connections", OFFSET(listen), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, .flags = D\|E },
	48	{ "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 },
	49	{ "listen_timeout", "Connection awaiting timeout", OFFSET(listen_timeout), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, INT_MAX, .flags = D\|E },
	50	{ NULL }
2ba45a60 DM	51	};
2ba45a60 DM	52
f6fa7814	53	static const AVClass tcp_class = {
2ba45a60 DM	54	.class_name = "tcp",
	55	.item_name = av_default_item_name,
	56	.option = options,
	57	.version = LIBAVUTIL_VERSION_INT,
	58	};
	59
	60	/* return non zero if error */
	61	static int tcp_open(URLContext h, const char uri, int flags)
	62	{
	63	struct addrinfo hints = { 0 }, ai, cur_ai;
	64	int port, fd = -1;
	65	TCPContext *s = h->priv_data;
	66	const char *p;
	67	char buf[256];
	68	int ret;
	69	char hostname[1024],proto[1024],path[1024];
	70	char portstr[10];
	71	s->open_timeout = 5000000;
	72
	73	av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
	74	&port, path, sizeof(path), uri);
	75	if (strcmp(proto, "tcp"))
	76	return AVERROR(EINVAL);
	77	if (port <= 0 \|\| port >= 65536) {
	78	av_log(h, AV_LOG_ERROR, "Port missing in uri\n");
	79	return AVERROR(EINVAL);
	80	}
	81	p = strchr(uri, '?');
	82	if (p) {
	83	if (av_find_info_tag(buf, sizeof(buf), "listen", p)) {
	84	char *endptr = NULL;
	85	s->listen = strtol(buf, &endptr, 10);
	86	/* assume if no digits were found it is a request to enable it */
	87	if (buf == endptr)
	88	s->listen = 1;
	89	}
	90	if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) {
	91	s->rw_timeout = strtol(buf, NULL, 10);
	92	}
	93	if (av_find_info_tag(buf, sizeof(buf), "listen_timeout", p)) {
	94	s->listen_timeout = strtol(buf, NULL, 10);
	95	}
	96	}
	97	if (s->rw_timeout >= 0) {
	98	s->open_timeout =
	99	h->rw_timeout = s->rw_timeout;
	100	}
	101	hints.ai_family = AF_UNSPEC;
	102	hints.ai_socktype = SOCK_STREAM;
	103	snprintf(portstr, sizeof(portstr), "%d", port);
	104	if (s->listen)
	105	hints.ai_flags \|= AI_PASSIVE;
	106	if (!hostname[0])
	107	ret = getaddrinfo(NULL, portstr, &hints, &ai);
	108	else
	109	ret = getaddrinfo(hostname, portstr, &hints, &ai);
	110	if (ret) {
	111	av_log(h, AV_LOG_ERROR,
	112	"Failed to resolve hostname %s: %s\n",
	113	hostname, gai_strerror(ret));
	114	return AVERROR(EIO);
	115	}
	116
	117	cur_ai = ai;
118
119	restart:
120	fd = ff_socket(cur_ai->ai_family,
121	cur_ai->ai_socktype,
122	cur_ai->ai_protocol);
123	if (fd < 0) {
124	ret = ff_neterrno();
125	goto fail;
126	}
127
128	if (s->listen) {
129	if ((fd = ff_listen_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
130	s->listen_timeout, h)) < 0) {
131	ret = fd;
132	goto fail1;
133	}
134	} else {
135	if ((ret = ff_listen_connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
136	s->open_timeout / 1000, h, !!cur_ai->ai_next)) < 0) {
137
138	if (ret == AVERROR_EXIT)
139	goto fail1;
140	else
141	goto fail;
142	}
143	}
144
145	h->is_streamed = 1;
146	s->fd = fd;
147	freeaddrinfo(ai);
148	return 0;
149
150	fail:
151	if (cur_ai->ai_next) {
152	/* Retry with the next sockaddr */
153	cur_ai = cur_ai->ai_next;
154	if (fd >= 0)
155	closesocket(fd);
156	ret = 0;
157	goto restart;
158	}
159	fail1:
160	if (fd >= 0)
161	closesocket(fd);
162	freeaddrinfo(ai);
163	return ret;
164	}
165
166	static int tcp_read(URLContext h, uint8_t buf, int size)
167	{
168	TCPContext *s = h->priv_data;
169	int ret;
170
171	if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
172	ret = ff_network_wait_fd_timeout(s->fd, 0, h->rw_timeout, &h->interrupt_callback);
173	if (ret)
174	return ret;
175	}
176	ret = recv(s->fd, buf, size, 0);
177	return ret < 0 ? ff_neterrno() : ret;
178	}
179
180	static int tcp_write(URLContext h, const uint8_t buf, int size)
181	{
182	TCPContext *s = h->priv_data;
183	int ret;
184
185	if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
186	ret = ff_network_wait_fd_timeout(s->fd, 1, h->rw_timeout, &h->interrupt_callback);
187	if (ret)
188	return ret;
189	}
190	ret = send(s->fd, buf, size, MSG_NOSIGNAL);
191	return ret < 0 ? ff_neterrno() : ret;
192	}
193
194	static int tcp_shutdown(URLContext *h, int flags)
195	{
196	TCPContext *s = h->priv_data;
197	int how;
198
199	if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
200	how = SHUT_RDWR;
201	} else if (flags & AVIO_FLAG_WRITE) {
202	how = SHUT_WR;
203	} else {
204	how = SHUT_RD;
205	}
206
207	return shutdown(s->fd, how);
208	}
209
210	static int tcp_close(URLContext *h)
211	{
212	TCPContext *s = h->priv_data;
213	closesocket(s->fd);
214	return 0;
215	}
216
217	static int tcp_get_file_handle(URLContext *h)
218	{
219	TCPContext *s = h->priv_data;
220	return s->fd;
221	}
222
223	URLProtocol ff_tcp_protocol = {
224	.name = "tcp",
225	.url_open = tcp_open,
226	.url_read = tcp_read,
227	.url_write = tcp_write,
228	.url_close = tcp_close,
229	.url_get_file_handle = tcp_get_file_handle,
230	.url_shutdown = tcp_shutdown,
231	.priv_data_size = sizeof(TCPContext),
2ba45a60	232	.flags = URL_PROTOCOL_FLAG_NETWORK,
f6fa7814	233	.priv_data_class = &tcp_class,
2ba45a60	234	};