[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 on port instead of connecting", OFFSET(listen), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D|E },
{"timeout", "set timeout of socket I/O operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D|E },
{"listen_timeout", "set 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)) {
            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),
    .priv_data_class     = &tcp_context_class,
    .flags               = URL_PROTOCOL_FLAG_NETWORK,
};
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"
	25	#include "internal.h"
	26	#include "network.h"
	27	#include "os_support.h"
	28	#include "url.h"
	29	#if HAVE_POLL_H
	30	#include <poll.h>
	31	#endif
	32
	33	typedef struct TCPContext {
	34	const AVClass *class;
	35	int fd;
	36	int listen;
	37	int open_timeout;
	38	int rw_timeout;
	39	int listen_timeout;
	40	} TCPContext;
	41
	42	#define OFFSET(x) offsetof(TCPContext, x)
	43	#define D AV_OPT_FLAG_DECODING_PARAM
	44	#define E AV_OPT_FLAG_ENCODING_PARAM
	45	static const AVOption options[] = {
	46	{"listen", "listen on port instead of connecting", OFFSET(listen), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, D\|E },
	47	{"timeout", "set timeout of socket I/O operations", OFFSET(rw_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D\|E },
	48	{"listen_timeout", "set connection awaiting timeout", OFFSET(listen_timeout), AV_OPT_TYPE_INT, {.i64 = -1}, -1, INT_MAX, D\|E },
	49	{NULL}
	50	};
	51
	52	static const AVClass tcp_context_class = {
	53	.class_name = "tcp",
	54	.item_name = av_default_item_name,
	55	.option = options,
	56	.version = LIBAVUTIL_VERSION_INT,
	57	};
	58
	59	/* return non zero if error */
	60	static int tcp_open(URLContext h, const char uri, int flags)
	61	{
	62	struct addrinfo hints = { 0 }, ai, cur_ai;
	63	int port, fd = -1;
	64	TCPContext *s = h->priv_data;
65	const char *p;
66	char buf[256];
67	int ret;
68	char hostname[1024],proto[1024],path[1024];
69	char portstr[10];
70	s->open_timeout = 5000000;
71
72	av_url_split(proto, sizeof(proto), NULL, 0, hostname, sizeof(hostname),
73	&port, path, sizeof(path), uri);
74	if (strcmp(proto, "tcp"))
75	return AVERROR(EINVAL);
76	if (port <= 0 \|\| port >= 65536) {
77	av_log(h, AV_LOG_ERROR, "Port missing in uri\n");
78	return AVERROR(EINVAL);
79	}
80	p = strchr(uri, '?');
81	if (p) {
82	if (av_find_info_tag(buf, sizeof(buf), "listen", p)) {
83	char *endptr = NULL;
84	s->listen = strtol(buf, &endptr, 10);
85	/* assume if no digits were found it is a request to enable it */
86	if (buf == endptr)
87	s->listen = 1;
88	}
89	if (av_find_info_tag(buf, sizeof(buf), "timeout", p)) {
90	s->rw_timeout = strtol(buf, NULL, 10);
91	}
92	if (av_find_info_tag(buf, sizeof(buf), "listen_timeout", p)) {
93	s->listen_timeout = strtol(buf, NULL, 10);
94	}
95	}
96	if (s->rw_timeout >= 0) {
97	s->open_timeout =
98	h->rw_timeout = s->rw_timeout;
99	}
100	hints.ai_family = AF_UNSPEC;
101	hints.ai_socktype = SOCK_STREAM;
102	snprintf(portstr, sizeof(portstr), "%d", port);
103	if (s->listen)
104	hints.ai_flags \|= AI_PASSIVE;
105	if (!hostname[0])
106	ret = getaddrinfo(NULL, portstr, &hints, &ai);
107	else
108	ret = getaddrinfo(hostname, portstr, &hints, &ai);
109	if (ret) {
110	av_log(h, AV_LOG_ERROR,
111	"Failed to resolve hostname %s: %s\n",
112	hostname, gai_strerror(ret));
113	return AVERROR(EIO);
114	}
115
116	cur_ai = ai;
117
118	restart:
119	fd = ff_socket(cur_ai->ai_family,
120	cur_ai->ai_socktype,
121	cur_ai->ai_protocol);
122	if (fd < 0) {
123	ret = ff_neterrno();
124	goto fail;
125	}
126
127	if (s->listen) {
128	if ((fd = ff_listen_bind(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
129	s->listen_timeout, h)) < 0) {
130	ret = fd;
131	goto fail1;
132	}
133	} else {
134	if ((ret = ff_listen_connect(fd, cur_ai->ai_addr, cur_ai->ai_addrlen,
135	s->open_timeout / 1000, h, !!cur_ai->ai_next)) < 0) {
136
137	if (ret == AVERROR_EXIT)
138	goto fail1;
139	else
140	goto fail;
141	}
142	}
143
144	h->is_streamed = 1;
145	s->fd = fd;
146	freeaddrinfo(ai);
147	return 0;
148
149	fail:
150	if (cur_ai->ai_next) {
151	/* Retry with the next sockaddr */
152	cur_ai = cur_ai->ai_next;
153	if (fd >= 0)
154	closesocket(fd);
155	ret = 0;
156	goto restart;
157	}
158	fail1:
159	if (fd >= 0)
160	closesocket(fd);
161	freeaddrinfo(ai);
162	return ret;
163	}
164
165	static int tcp_read(URLContext h, uint8_t buf, int size)
166	{
167	TCPContext *s = h->priv_data;
168	int ret;
169
170	if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
171	ret = ff_network_wait_fd_timeout(s->fd, 0, h->rw_timeout, &h->interrupt_callback);
172	if (ret)
173	return ret;
174	}
175	ret = recv(s->fd, buf, size, 0);
176	return ret < 0 ? ff_neterrno() : ret;
177	}
178
179	static int tcp_write(URLContext h, const uint8_t buf, int size)
180	{
181	TCPContext *s = h->priv_data;
182	int ret;
183
184	if (!(h->flags & AVIO_FLAG_NONBLOCK)) {
185	ret = ff_network_wait_fd_timeout(s->fd, 1, h->rw_timeout, &h->interrupt_callback);
186	if (ret)
187	return ret;
188	}
189	ret = send(s->fd, buf, size, MSG_NOSIGNAL);
190	return ret < 0 ? ff_neterrno() : ret;
191	}
192
193	static int tcp_shutdown(URLContext *h, int flags)
194	{
195	TCPContext *s = h->priv_data;
196	int how;
197
198	if (flags & AVIO_FLAG_WRITE && flags & AVIO_FLAG_READ) {
199	how = SHUT_RDWR;
200	} else if (flags & AVIO_FLAG_WRITE) {
201	how = SHUT_WR;
202	} else {
203	how = SHUT_RD;
204	}
205
206	return shutdown(s->fd, how);
207	}
208
209	static int tcp_close(URLContext *h)
210	{
211	TCPContext *s = h->priv_data;
212	closesocket(s->fd);
213	return 0;
214	}
215
216	static int tcp_get_file_handle(URLContext *h)
217	{
218	TCPContext *s = h->priv_data;
219	return s->fd;
220	}
221
222	URLProtocol ff_tcp_protocol = {
223	.name = "tcp",
224	.url_open = tcp_open,
225	.url_read = tcp_read,
226	.url_write = tcp_write,
227	.url_close = tcp_close,
228	.url_get_file_handle = tcp_get_file_handle,
229	.url_shutdown = tcp_shutdown,
230	.priv_data_size = sizeof(TCPContext),
231	.priv_data_class = &tcp_context_class,
232	.flags = URL_PROTOCOL_FLAG_NETWORK,
233	};