FFmpeg coverage

Line	Branch	Exec	Source
1			/*
2			* MMS protocol over HTTP
3			* Copyright (c) 2010 Zhentan Feng <spyfeng at gmail dot com>
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
22			/*
23			* Reference
24			* Windows Media HTTP Streaming Protocol.
25			* http://msdn.microsoft.com/en-us/library/cc251059(PROT.10).aspx
26			*/
27
28			#include <string.h>
29			#include "libavutil/intreadwrite.h"
30			#include "libavutil/avstring.h"
31			#include "libavutil/mem.h"
32			#include "libavutil/opt.h"
33			#include "avformat.h"
34			#include "mms.h"
35			#include "http.h"
36			#include "url.h"
37
38			#define CHUNK_HEADER_LENGTH 4 // 2bytes chunk type and 2bytes chunk length.
39			#define EXT_HEADER_LENGTH 8 // 4bytes sequence, 2bytes useless and 2bytes chunk length.
40
41			// see Ref 2.2.1.8
42			#define USERAGENT "User-Agent: NSPlayer/4.1.0.3856\r\n"
43			// see Ref 2.2.1.4.33
44			// the GUID value can be changed to any valid value.
45			#define CLIENTGUID "Pragma: xClientGUID={c77e7400-738a-11d2-9add-0020af0a3278}\r\n"
46
47			// see Ref 2.2.3 for packet type define:
48			// chunk type contains 2 fields: Frame and PacketID.
49			// Frame is 0x24 or 0xA4(rarely), different PacketID indicates different packet type.
50			typedef enum {
51			CHUNK_TYPE_DATA = 0x4424,
52			CHUNK_TYPE_ASF_HEADER = 0x4824,
53			CHUNK_TYPE_END = 0x4524,
54			CHUNK_TYPE_STREAM_CHANGE = 0x4324,
55			} ChunkType;
56
57			typedef struct MMSHContext {
58			MMSContext mms;
59			uint8_t location[1024];
60			int request_seq; ///< request packet sequence
61			int chunk_seq; ///< data packet sequence
62			} MMSHContext;
63
64		✗	static int mmsh_close(URLContext *h)
65			{
66		✗	MMSHContext *mmsh = (MMSHContext *)h->priv_data;
67		✗	MMSContext *mms = &mmsh->mms;
68		✗	ffurl_closep(&mms->mms_hd);
69		✗	av_freep(&mms->streams);
70		✗	av_freep(&mms->asf_header);
71		✗	return 0;
72			}
73
74		✗	static ChunkType get_chunk_header(MMSHContext *mmsh, int *len)
75			{
76		✗	MMSContext *mms = &mmsh->mms;
77			uint8_t chunk_header[CHUNK_HEADER_LENGTH];
78			uint8_t ext_header[EXT_HEADER_LENGTH];
79			ChunkType chunk_type;
80			int chunk_len, res, ext_header_len;
81
82		✗	res = ffurl_read_complete(mms->mms_hd, chunk_header, CHUNK_HEADER_LENGTH);
83		✗	if (res != CHUNK_HEADER_LENGTH) {
84		✗	av_log(NULL, AV_LOG_ERROR, "Read data packet header failed!\n");
85		✗	return AVERROR(EIO);
86			}
87		✗	chunk_type = AV_RL16(chunk_header);
88		✗	chunk_len = AV_RL16(chunk_header + 2);
89
90		✗	switch (chunk_type) {
91		✗	case CHUNK_TYPE_END:
92			case CHUNK_TYPE_STREAM_CHANGE:
93		✗	ext_header_len = 4;
94		✗	break;
95		✗	case CHUNK_TYPE_ASF_HEADER:
96			case CHUNK_TYPE_DATA:
97		✗	ext_header_len = 8;
98		✗	break;
99		✗	default:
100		✗	av_log(NULL, AV_LOG_ERROR, "Strange chunk type %d\n", chunk_type);
101		✗	return AVERROR_INVALIDDATA;
102			}
103
104		✗	res = ffurl_read_complete(mms->mms_hd, ext_header, ext_header_len);
105		✗	if (res != ext_header_len) {
106		✗	av_log(NULL, AV_LOG_ERROR, "Read ext header failed!\n");
107		✗	return AVERROR(EIO);
108			}
109		✗	*len = chunk_len - ext_header_len;
110		✗	if (chunk_type == CHUNK_TYPE_END || chunk_type == CHUNK_TYPE_DATA)
111		✗	mmsh->chunk_seq = AV_RL32(ext_header);
112		✗	return chunk_type;
113			}
114
115		✗	static int read_data_packet(MMSHContext *mmsh, const int len)
116			{
117		✗	MMSContext *mms = &mmsh->mms;
118			int res;
119		✗	if (len > sizeof(mms->in_buffer)) {
120		✗	av_log(NULL, AV_LOG_ERROR,
121			"Data packet length %d exceeds the in_buffer size %"SIZE_SPECIFIER"\n",
122			len, sizeof(mms->in_buffer));
123		✗	return AVERROR(EIO);
124			}
125		✗	res = ffurl_read_complete(mms->mms_hd, mms->in_buffer, len);
126		✗	av_log(NULL, AV_LOG_TRACE, "Data packet len = %d\n", len);
127		✗	if (res != len) {
128		✗	av_log(NULL, AV_LOG_ERROR, "Read data packet failed!\n");
129		✗	return AVERROR(EIO);
130			}
131		✗	if (len > mms->asf_packet_len) {
132		✗	av_log(NULL, AV_LOG_ERROR,
133			"Chunk length %d exceed packet length %d\n",len, mms->asf_packet_len);
134		✗	return AVERROR_INVALIDDATA;
135			} else {
136		✗	memset(mms->in_buffer + len, 0, mms->asf_packet_len - len); // padding
137			}
138		✗	mms->read_in_ptr = mms->in_buffer;
139		✗	mms->remaining_in_len = mms->asf_packet_len;
140		✗	return 0;
141			}
142
143		✗	static int get_http_header_data(MMSHContext *mmsh)
144			{
145		✗	MMSContext *mms = &mmsh->mms;
146			int res, len;
147			ChunkType chunk_type;
148
149			for (;;) {
150		✗	len = 0;
151		✗	res = chunk_type = get_chunk_header(mmsh, &len);
152		✗	if (res < 0) {
153		✗	return res;
154		✗	} else if (chunk_type == CHUNK_TYPE_ASF_HEADER){
155			// get asf header and stored it
156		✗	if (!mms->header_parsed) {
157		✗	if (mms->asf_header) {
158		✗	if (len != mms->asf_header_size) {
159		✗	mms->asf_header_size = len;
160		✗	av_log(NULL, AV_LOG_TRACE, "Header len changed from %d to %d\n",
161			mms->asf_header_size, len);
162		✗	av_freep(&mms->asf_header);
163			}
164			}
165		✗	mms->asf_header = av_mallocz(len);
166		✗	if (!mms->asf_header) {
167		✗	return AVERROR(ENOMEM);
168			}
169		✗	mms->asf_header_size = len;
170			}
171		✗	if (len > mms->asf_header_size) {
172		✗	av_log(NULL, AV_LOG_ERROR,
173			"Asf header packet len = %d exceed the asf header buf size %d\n",
174			len, mms->asf_header_size);
175		✗	return AVERROR(EIO);
176			}
177		✗	res = ffurl_read_complete(mms->mms_hd, mms->asf_header, len);
178		✗	if (res != len) {
179		✗	av_log(NULL, AV_LOG_ERROR,
180			"Recv asf header data len %d != expected len %d\n", res, len);
181		✗	return AVERROR(EIO);
182			}
183		✗	mms->asf_header_size = len;
184		✗	if (!mms->header_parsed) {
185		✗	res = ff_mms_asf_header_parser(mms);
186		✗	mms->header_parsed = 1;
187		✗	return res;
188			}
189		✗	} else if (chunk_type == CHUNK_TYPE_DATA) {
190			// read data packet and do padding
191		✗	return read_data_packet(mmsh, len);
192			} else {
193		✗	if (len) {
194		✗	if (len > sizeof(mms->in_buffer)) {
195		✗	av_log(NULL, AV_LOG_ERROR,
196			"Other packet len = %d exceed the in_buffer size %"SIZE_SPECIFIER"\n",
197			len, sizeof(mms->in_buffer));
198		✗	return AVERROR(EIO);
199			}
200		✗	res = ffurl_read_complete(mms->mms_hd, mms->in_buffer, len);
201		✗	if (res != len) {
202		✗	av_log(NULL, AV_LOG_ERROR, "Read other chunk type data failed!\n");
203		✗	return AVERROR(EIO);
204			} else {
205		✗	av_log(NULL, AV_LOG_TRACE, "Skip chunk type %d \n", chunk_type);
206		✗	continue;
207			}
208			}
209			}
210			}
211			}
212
213		✗	static int mmsh_open_internal(URLContext *h, const char *uri, int flags, int timestamp, int64_t pos)
214			{
215			int i, port, err;
216			char httpname[256], path[256], host[128];
217		✗	char *stream_selection = NULL;
218			char headers[1024];
219		✗	MMSHContext *mmsh = h->priv_data;
220			MMSContext *mms;
221
222		✗	mmsh->request_seq = h->is_streamed = 1;
223		✗	mms = &mmsh->mms;
224		✗	av_strlcpy(mmsh->location, uri, sizeof(mmsh->location));
225
226		✗	av_url_split(NULL, 0, NULL, 0,
227		✗	host, sizeof(host), &port, path, sizeof(path), mmsh->location);
228		✗	if (port<0)
229		✗	port = 80; // default mmsh protocol port
230		✗	ff_url_join(httpname, sizeof(httpname), "http", NULL, host, port, "%s", path);
231
232		✗	if (ffurl_alloc(&mms->mms_hd, httpname, AVIO_FLAG_READ,
233		✗	&h->interrupt_callback) < 0) {
234		✗	return AVERROR(EIO);
235			}
236
237		✗	snprintf(headers, sizeof(headers),
238			"Accept: */*\r\n"
239			USERAGENT
240			"Host: %s:%d\r\n"
241			"Pragma: no-cache,rate=1.000000,stream-time=0,"
242			"stream-offset=0:0,request-context=%u,max-duration=0\r\n"
243			CLIENTGUID
244			"Connection: Close\r\n",
245		✗	host, port, mmsh->request_seq++);
246		✗	av_opt_set(mms->mms_hd->priv_data, "headers", headers, 0);
247
248		✗	if (!mms->mms_hd->protocol_whitelist && h->protocol_whitelist) {
249		✗	mms->mms_hd->protocol_whitelist = av_strdup(h->protocol_whitelist);
250		✗	if (!mms->mms_hd->protocol_whitelist) {
251		✗	err = AVERROR(ENOMEM);
252		✗	goto fail;
253			}
254			}
255
256		✗	err = ffurl_connect(mms->mms_hd, NULL);
257		✗	if (err) {
258		✗	goto fail;
259			}
260		✗	err = get_http_header_data(mmsh);
261		✗	if (err) {
262		✗	av_log(NULL, AV_LOG_ERROR, "Get http header data failed!\n");
263		✗	goto fail;
264			}
265
266			// close the socket and then reopen it for sending the second play request.
267		✗	ffurl_closep(&mms->mms_hd);
268		✗	memset(headers, 0, sizeof(headers));
269		✗	if ((err = ffurl_alloc(&mms->mms_hd, httpname, AVIO_FLAG_READ,
270		✗	&h->interrupt_callback)) < 0) {
271		✗	goto fail;
272			}
273		✗	stream_selection = av_mallocz(mms->stream_num * 19 + 1);
274		✗	if (!stream_selection)
275		✗	return AVERROR(ENOMEM);
276		✗	for (i = 0; i < mms->stream_num; i++) {
277			char tmp[20];
278		✗	err = snprintf(tmp, sizeof(tmp), "ffff:%d:0 ", mms->streams[i].id);
279		✗	if (err < 0)
280		✗	goto fail;
281		✗	av_strlcat(stream_selection, tmp, mms->stream_num * 19 + 1);
282			}
283			// send play request
284		✗	err = snprintf(headers, sizeof(headers),
285			"Accept: */*\r\n"
286			USERAGENT
287			"Host: %s:%d\r\n"
288			"Pragma: no-cache,rate=1.000000,request-context=%u\r\n"
289			"Pragma: xPlayStrm=1\r\n"
290			CLIENTGUID
291			"Pragma: stream-switch-count=%d\r\n"
292			"Pragma: stream-switch-entry=%s\r\n"
293			"Pragma: no-cache,rate=1.000000,stream-time=%u"
294			"Connection: Close\r\n",
295		✗	host, port, mmsh->request_seq++, mms->stream_num, stream_selection, timestamp);
296		✗	av_freep(&stream_selection);
297		✗	if (err < 0) {
298		✗	av_log(NULL, AV_LOG_ERROR, "Build play request failed!\n");
299		✗	goto fail;
300			}
301		✗	av_log(NULL, AV_LOG_TRACE, "out_buffer is %s", headers);
302		✗	av_opt_set(mms->mms_hd->priv_data, "headers", headers, 0);
303
304		✗	err = ffurl_connect(mms->mms_hd, NULL);
305		✗	if (err) {
306		✗	goto fail;
307			}
308
309		✗	err = get_http_header_data(mmsh);
310		✗	if (err) {
311		✗	av_log(NULL, AV_LOG_ERROR, "Get http header data failed!\n");
312		✗	goto fail;
313			}
314
315		✗	av_log(NULL, AV_LOG_TRACE, "Connection successfully open\n");
316		✗	return 0;
317		✗	fail:
318		✗	av_freep(&stream_selection);
319		✗	mmsh_close(h);
320		✗	av_log(NULL, AV_LOG_TRACE, "Connection failed with error %d\n", err);
321		✗	return err;
322			}
323
324		✗	static int mmsh_open(URLContext *h, const char *uri, int flags)
325			{
326		✗	return mmsh_open_internal(h, uri, flags, 0, 0);
327			}
328
329		✗	static int handle_chunk_type(MMSHContext *mmsh)
330			{
331		✗	MMSContext *mms = &mmsh->mms;
332		✗	int res, len = 0;
333			ChunkType chunk_type;
334		✗	chunk_type = get_chunk_header(mmsh, &len);
335
336		✗	switch (chunk_type) {
337		✗	case CHUNK_TYPE_END:
338		✗	mmsh->chunk_seq = 0;
339		✗	av_log(NULL, AV_LOG_ERROR, "Stream ended!\n");
340		✗	return AVERROR(EIO);
341		✗	case CHUNK_TYPE_STREAM_CHANGE:
342		✗	mms->header_parsed = 0;
343		✗	if (res = get_http_header_data(mmsh)) {
344		✗	av_log(NULL, AV_LOG_ERROR,"Stream changed! Failed to get new header!\n");
345		✗	return res;
346			}
347		✗	break;
348		✗	case CHUNK_TYPE_DATA:
349		✗	return read_data_packet(mmsh, len);
350		✗	default:
351		✗	av_log(NULL, AV_LOG_ERROR, "Recv other type packet %d\n", chunk_type);
352		✗	return AVERROR_INVALIDDATA;
353			}
354		✗	return 0;
355			}
356
357		✗	static int mmsh_read(URLContext *h, uint8_t *buf, int size)
358			{
359		✗	int res = 0;
360		✗	MMSHContext *mmsh = h->priv_data;
361		✗	MMSContext *mms = &mmsh->mms;
362			do {
363		✗	if (mms->asf_header_read_size < mms->asf_header_size) {
364			// copy asf header into buffer
365		✗	res = ff_mms_read_header(mms, buf, size);
366			} else {
367		✗	if (!mms->remaining_in_len && (res = handle_chunk_type(mmsh)))
368		✗	return res;
369		✗	res = ff_mms_read_data(mms, buf, size);
370			}
371		✗	} while (!res);
372		✗	return res;
373			}
374
375		✗	static int64_t mmsh_read_seek(void *opaque, int stream_index,
376			int64_t timestamp, int flags)
377			{
378		✗	URLContext *h = opaque;
379		✗	MMSHContext *mmsh_old = h->priv_data;
380		✗	MMSHContext *mmsh = av_mallocz(sizeof(*mmsh));
381			int ret;
382
383		✗	if (!mmsh)
384		✗	return AVERROR(ENOMEM);
385
386		✗	h->priv_data = mmsh;
387		✗	ret= mmsh_open_internal(h, mmsh_old->location, 0, FFMAX(timestamp, 0), 0);
388		✗	if(ret>=0){
389		✗	h->priv_data = mmsh_old;
390		✗	mmsh_close(h);
391		✗	h->priv_data = mmsh;
392		✗	av_free(mmsh_old);
393		✗	mmsh->mms.asf_header_read_size = mmsh->mms.asf_header_size;
394			}else {
395		✗	h->priv_data = mmsh_old;
396		✗	av_free(mmsh);
397			}
398
399		✗	return ret;
400			}
401
402		✗	static int64_t mmsh_seek(URLContext *h, int64_t pos, int whence)
403			{
404		✗	MMSHContext *mmsh = h->priv_data;
405		✗	MMSContext *mms = &mmsh->mms;
406
407		✗	if(pos == 0 && whence == SEEK_CUR)
408		✗	return mms->asf_header_read_size + mms->remaining_in_len + mmsh->chunk_seq * (int64_t)mms->asf_packet_len;
409		✗	return AVERROR(ENOSYS);
410			}
411
412			const URLProtocol ff_mmsh_protocol = {
413			.name = "mmsh",
414			.url_open = mmsh_open,
415			.url_read = mmsh_read,
416			.url_seek = mmsh_seek,
417			.url_close = mmsh_close,
418			.url_read_seek = mmsh_read_seek,
419			.priv_data_size = sizeof(MMSHContext),
420			.flags = URL_PROTOCOL_FLAG_NETWORK,
421			.default_whitelist = "http,tcp",
422			};
423