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Fix many ES_OUT_RESET_PCR problems
[vlc.git] / modules / stream_out / raop.c
bloba9e51fafce4cbcea07907ae27ec929ce231b9b91
1 /*****************************************************************************
2 * raop.c: Remote Audio Output Protocol streaming support
3 *****************************************************************************
4 * Copyright (C) 2008 the VideoLAN team
5 * $Id$
6 *
7 * Author: Michael Hanselmann
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
23
24 /*****************************************************************************
25 * Preamble
26 *****************************************************************************/
27 #ifdef HAVE_CONFIG_H
28 # include "config.h"
29 #endif
30
31 #include <assert.h>
32
33 #include <gcrypt.h>
34
35 #include <vlc_common.h>
36 #include <vlc_plugin.h>
37 #include <vlc_sout.h>
38 #include <vlc_block.h>
39 #include <vlc_network.h>
40 #include <vlc_strings.h>
41 #include <vlc_charset.h>
42 #include <vlc_fs.h>
43 #include <vlc_gcrypt.h>
44 #include <vlc_es.h>
45 #include <vlc_http.h>
46 #include <vlc_memory.h>
47
48 #define RAOP_PORT 5000
49 #define RAOP_USER_AGENT "VLC " VERSION
50
51
52 static const char ps_raop_rsa_pubkey[] =
53 "\xe7\xd7\x44\xf2\xa2\xe2\x78\x8b\x6c\x1f\x55\xa0\x8e\xb7\x05\x44"
54 "\xa8\xfa\x79\x45\xaa\x8b\xe6\xc6\x2c\xe5\xf5\x1c\xbd\xd4\xdc\x68"
55 "\x42\xfe\x3d\x10\x83\xdd\x2e\xde\xc1\xbf\xd4\x25\x2d\xc0\x2e\x6f"
56 "\x39\x8b\xdf\x0e\x61\x48\xea\x84\x85\x5e\x2e\x44\x2d\xa6\xd6\x26"
57 "\x64\xf6\x74\xa1\xf3\x04\x92\x9a\xde\x4f\x68\x93\xef\x2d\xf6\xe7"
58 "\x11\xa8\xc7\x7a\x0d\x91\xc9\xd9\x80\x82\x2e\x50\xd1\x29\x22\xaf"
59 "\xea\x40\xea\x9f\x0e\x14\xc0\xf7\x69\x38\xc5\xf3\x88\x2f\xc0\x32"
60 "\x3d\xd9\xfe\x55\x15\x5f\x51\xbb\x59\x21\xc2\x01\x62\x9f\xd7\x33"
61 "\x52\xd5\xe2\xef\xaa\xbf\x9b\xa0\x48\xd7\xb8\x13\xa2\xb6\x76\x7f"
62 "\x6c\x3c\xcf\x1e\xb4\xce\x67\x3d\x03\x7b\x0d\x2e\xa3\x0c\x5f\xff"
63 "\xeb\x06\xf8\xd0\x8a\xdd\xe4\x09\x57\x1a\x9c\x68\x9f\xef\x10\x72"
64 "\x88\x55\xdd\x8c\xfb\x9a\x8b\xef\x5c\x89\x43\xef\x3b\x5f\xaa\x15"
65 "\xdd\xe6\x98\xbe\xdd\xf3\x59\x96\x03\xeb\x3e\x6f\x61\x37\x2b\xb6"
66 "\x28\xf6\x55\x9f\x59\x9a\x78\xbf\x50\x06\x87\xaa\x7f\x49\x76\xc0"
67 "\x56\x2d\x41\x29\x56\xf8\x98\x9e\x18\xa6\x35\x5b\xd8\x15\x97\x82"
68 "\x5e\x0f\xc8\x75\x34\x3e\xc7\x82\x11\x76\x25\xcd\xbf\x98\x44\x7b";
69
70 static const char ps_raop_rsa_exp[] = "\x01\x00\x01";
71
72 static const char psz_delim_space[] = " ";
73 static const char psz_delim_colon[] = ":";
74 static const char psz_delim_equal[] = "=";
75 static const char psz_delim_semicolon[] = ";";
76
77
78 /*****************************************************************************
79 * Prototypes
80 *****************************************************************************/
81 static int Open( vlc_object_t * );
82 static void Close( vlc_object_t * );
83
84 static sout_stream_id_t *Add( sout_stream_t *, es_format_t * );
85 static int Del( sout_stream_t *, sout_stream_id_t * );
86 static int Send( sout_stream_t *, sout_stream_id_t *, block_t* );
87
88 static int VolumeCallback( vlc_object_t *p_this, char const *psz_cmd,
89 vlc_value_t oldval, vlc_value_t newval,
90 void *p_data );
91
92 typedef enum
93 {
94 JACK_TYPE_NONE = 0,
95 JACK_TYPE_ANALOG,
96 JACK_TYPE_DIGITAL,
97 } jack_type_t;
98
99 struct sout_stream_sys_t
100 {
101 /* Input parameters */
102 char *psz_host;
103 char *psz_password;
104 int i_volume;
105
106 /* Plugin status */
107 sout_stream_id_t *p_audio_stream;
108 bool b_alac_warning;
109 bool b_volume_callback;
110
111 /* Connection state */
112 int i_control_fd;
113 int i_stream_fd;
114
115 uint8_t ps_aes_key[16];
116 uint8_t ps_aes_iv[16];
117 gcry_cipher_hd_t aes_ctx;
118
119 char *psz_url;
120 char *psz_client_instance;
121 char *psz_session;
122 char *psz_last_status_line;
123
124 int i_cseq;
125 int i_server_port;
126 int i_audio_latency;
127 int i_jack_type;
128
129 http_auth_t auth;
130
131 /* Send buffer */
132 size_t i_sendbuf_len;
133 uint8_t *p_sendbuf;
134 };
135
136 struct sout_stream_id_t
137 {
138 es_format_t fmt;
139 };
140
141
142 /*****************************************************************************
143 * Module descriptor
144 *****************************************************************************/
145 #define SOUT_CFG_PREFIX "sout-raop-"
146
147 #define HOST_TEXT N_("Host")
148 #define HOST_LONGTEXT N_("Hostname or IP address of target device")
149
150 #define VOLUME_TEXT N_("Volume")
151 #define VOLUME_LONGTEXT N_("Output volume for analog output: 0 for silence, " \
152 "1..255 from almost silent to very loud.")
153
154 #define PASSWORD_TEXT N_("Password")
155 #define PASSWORD_LONGTEXT N_("Password for target device.")
156
157 #define PASSWORD_FILE_TEXT N_("Password file")
158 #define PASSWORD_FILE_LONGTEXT N_("Read password for target device from file.")
159
160 vlc_module_begin();
161 set_shortname( N_("RAOP") )
162 set_description( N_("Remote Audio Output Protocol stream output") )
163 set_capability( "sout stream", 0 )
164 add_shortcut( "raop" )
165 set_category( CAT_SOUT )
166 set_subcategory( SUBCAT_SOUT_STREAM )
167 add_string( SOUT_CFG_PREFIX "host", "",
168 HOST_TEXT, HOST_LONGTEXT, false )
169 add_password( SOUT_CFG_PREFIX "password", NULL,
170 PASSWORD_TEXT, PASSWORD_LONGTEXT, false )
171 add_loadfile( SOUT_CFG_PREFIX "password-file", NULL,
172 PASSWORD_FILE_TEXT, PASSWORD_FILE_LONGTEXT, false )
173 add_integer_with_range( SOUT_CFG_PREFIX "volume", 100, 0, 255,
174 VOLUME_TEXT, VOLUME_LONGTEXT, false )
175 set_callbacks( Open, Close )
176 vlc_module_end()
177
178 static const char *const ppsz_sout_options[] = {
179 "host",
180 "password",
181 "password-file",
182 "volume",
183 NULL
184 };
185
186
187 /*****************************************************************************
188 * Utilities:
189 *****************************************************************************/
190 static void FreeSys( vlc_object_t *p_this, sout_stream_sys_t *p_sys )
191 {
192 sout_stream_t *p_stream = (sout_stream_t*)p_this;
193
194 if ( p_sys->i_control_fd >= 0 )
195 net_Close( p_sys->i_control_fd );
196 if ( p_sys->i_stream_fd >= 0 )
197 net_Close( p_sys->i_stream_fd );
198 if ( p_sys->b_volume_callback )
199 var_DelCallback( p_stream, SOUT_CFG_PREFIX "volume",
200 VolumeCallback, NULL );
201
202 gcry_cipher_close( p_sys->aes_ctx );
203
204 free( p_sys->p_sendbuf );
205 free( p_sys->psz_host );
206 free( p_sys->psz_password );
207 free( p_sys->psz_url );
208 free( p_sys->psz_session );
209 free( p_sys->psz_client_instance );
210 free( p_sys->psz_last_status_line );
211 free( p_sys );
212 }
213
214 static void FreeId( sout_stream_id_t *id )
215 {
216 free( id );
217 }
218
219 static void RemoveBase64Padding( char *str )
220 {
221 char *ps_pos = strchr( str, '=' );
222 if ( ps_pos != NULL )
223 *ps_pos = '\0';
224 }
225
226 static int CheckForGcryptErrorWithLine( sout_stream_t *p_stream,
227 gcry_error_t i_gcrypt_err,
228 unsigned int i_line )
229 {
230 if ( i_gcrypt_err != GPG_ERR_NO_ERROR )
231 {
232 msg_Err( p_stream, "gcrypt error (line %d): %s", i_line,
233 gpg_strerror( i_gcrypt_err ) );
234 return 1;
235 }
236
237 return 0;
238 }
239
240 /* Wrapper to pass line number for easier debugging */
241 #define CheckForGcryptError( p_this, i_gcrypt_err ) \
242 CheckForGcryptErrorWithLine( p_this, i_gcrypt_err, __LINE__ )
243
244 /* MGF1 is specified in RFC2437, section 10.2.1. Variables are named after the
245 * specification.
246 */
247 static int MGF1( vlc_object_t *p_this,
248 unsigned char *mask, size_t l,
249 const unsigned char *Z, const size_t zLen,
250 const int Hash )
251 {
252 sout_stream_t *p_stream = (sout_stream_t*)p_this;
253 gcry_error_t i_gcrypt_err;
254 gcry_md_hd_t md_handle = NULL;
255 unsigned int hLen;
256 unsigned char *ps_md;
257 uint32_t counter = 0;
258 uint8_t C[4];
259 size_t i_copylen;
260 int i_err = VLC_SUCCESS;
261
262 assert( mask != NULL );
263 assert( Z != NULL );
264
265 hLen = gcry_md_get_algo_dlen( Hash );
266
267 i_gcrypt_err = gcry_md_open( &md_handle, Hash, 0 );
268 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
269 {
270 i_err = VLC_EGENERIC;
271 goto error;
272 }
273
274 while ( l > 0 )
275 {
276 /* 3. For counter from 0 to \lceil{l / hLen}\rceil-1, do the following:
277 * a. Convert counter to an octet string C of length 4 with the
278 * primitive I2OSP: C = I2OSP (counter, 4)
279 */
280 C[0] = (counter >> 24) & 0xff;
281 C[1] = (counter >> 16) & 0xff;
282 C[2] = (counter >> 8) & 0xff;
283 C[3] = counter & 0xff;
284 ++counter;
285
286 /* b. Concatenate the hash of the seed Z and C to the octet string T:
287 * T = T || Hash (Z || C)
288 */
289 gcry_md_reset( md_handle );
290 gcry_md_write( md_handle, Z, zLen );
291 gcry_md_write( md_handle, C, 4 );
292 ps_md = gcry_md_read( md_handle, Hash );
293
294 /* 4. Output the leading l octets of T as the octet string mask. */
295 i_copylen = __MIN( l, hLen );
296 memcpy( mask, ps_md, i_copylen );
297 mask += i_copylen;
298 l -= i_copylen;
299 }
300
301 error:
302 gcry_md_close( md_handle );
303
304 return i_err;
305 }
306
307 /* EME-OAEP-ENCODE is specified in RFC2437, section 9.1.1.1. Variables are
308 * named after the specification.
309 */
310 static int AddOaepPadding( vlc_object_t *p_this,
311 unsigned char *EM, const size_t emLenWithPrefix,
312 const unsigned char *M, const size_t mLen,
313 const unsigned char *P, const size_t pLen )
314 {
315 const int Hash = GCRY_MD_SHA1;
316 const unsigned int hLen = gcry_md_get_algo_dlen( Hash );
317 unsigned char *seed = NULL;
318 unsigned char *DB = NULL;
319 unsigned char *dbMask = NULL;
320 unsigned char *seedMask = NULL;
321 size_t emLen;
322 size_t psLen;
323 size_t i;
324 int i_err = VLC_SUCCESS;
325
326 /* Space for 0x00 prefix in EM. */
327 emLen = emLenWithPrefix - 1;
328
329 /* Step 2:
330 * If ||M|| > emLen-2hLen-1 then output "message too long" and stop.
331 */
332 if ( mLen > (emLen - (2 * hLen) - 1) )
333 {
334 msg_Err( p_this , "Message too long" );
335 goto error;
336 }
337
338 /* Step 3:
339 * Generate an octet string PS consisting of emLen-||M||-2hLen-1 zero
340 * octets. The length of PS may be 0.
341 */
342 psLen = emLen - mLen - (2 * hLen) - 1;
343
344 /*
345 * Step 5:
346 * Concatenate pHash, PS, the message M, and other padding to form a data
347 * block DB as: DB = pHash || PS || 01 || M
348 */
349 DB = calloc( 1, hLen + psLen + 1 + mLen );
350 dbMask = calloc( 1, emLen - hLen );
351 seedMask = calloc( 1, hLen );
352
353 if ( DB == NULL || dbMask == NULL || seedMask == NULL )
354 {
355 i_err = VLC_ENOMEM;
356 goto error;
357 }
358
359 /* Step 4:
360 * Let pHash = Hash(P), an octet string of length hLen.
361 */
362 gcry_md_hash_buffer( Hash, DB, P, pLen );
363
364 /* Step 3:
365 * Generate an octet string PS consisting of emLen-||M||-2hLen-1 zero
366 * octets. The length of PS may be 0.
367 */
368 memset( DB + hLen, 0, psLen );
369
370 /* Step 5:
371 * Concatenate pHash, PS, the message M, and other padding to form a data
372 * block DB as: DB = pHash || PS || 01 || M
373 */
374 DB[hLen + psLen] = 0x01;
375 memcpy( DB + hLen + psLen + 1, M, mLen );
376
377 /* Step 6:
378 * Generate a random octet string seed of length hLen
379 */
380 seed = gcry_random_bytes( hLen, GCRY_STRONG_RANDOM );
381 if ( seed == NULL )
382 {
383 i_err = VLC_ENOMEM;
384 goto error;
385 }
386
387 /* Step 7:
388 * Let dbMask = MGF(seed, emLen-hLen).
389 */
390 i_err = MGF1( p_this, dbMask, emLen - hLen, seed, hLen, Hash );
391 if ( i_err != VLC_SUCCESS )
392 goto error;
393
394 /* Step 8:
395 * Let maskedDB = DB \xor dbMask.
396 */
397 for ( i = 0; i < (emLen - hLen); ++i )
398 DB[i] ^= dbMask[i];
399
400 /* Step 9:
401 * Let seedMask = MGF(maskedDB, hLen).
402 */
403 i_err = MGF1( p_this, seedMask, hLen, DB, emLen - hLen, Hash );
404 if ( i_err != VLC_SUCCESS )
405 goto error;
406
407 /* Step 10:
408 * Let maskedSeed = seed \xor seedMask.
409 */
410 for ( i = 0; i < hLen; ++i )
411 seed[i] ^= seedMask[i];
412
413 /* Step 11:
414 * Let EM = maskedSeed || maskedDB.
415 */
416 assert( (1 + hLen + (hLen + psLen + 1 + mLen)) == emLenWithPrefix );
417 EM[0] = 0x00;
418 memcpy( EM + 1, seed, hLen );
419 memcpy( EM + 1 + hLen, DB, hLen + psLen + 1 + mLen );
420
421 /* Step 12:
422 * Output EM.
423 */
424
425 error:
426 free( DB );
427 free( dbMask );
428 free( seedMask );
429 free( seed );
430
431 return i_err;
432 }
433
434 static int EncryptAesKeyBase64( vlc_object_t *p_this, char **result )
435 {
436 sout_stream_t *p_stream = (sout_stream_t*)p_this;
437 sout_stream_sys_t *p_sys = p_stream->p_sys;
438 gcry_error_t i_gcrypt_err;
439 gcry_sexp_t sexp_rsa_params = NULL;
440 gcry_sexp_t sexp_input = NULL;
441 gcry_sexp_t sexp_encrypted = NULL;
442 gcry_sexp_t sexp_token_a = NULL;
443 gcry_mpi_t mpi_pubkey = NULL;
444 gcry_mpi_t mpi_exp = NULL;
445 gcry_mpi_t mpi_input = NULL;
446 gcry_mpi_t mpi_output = NULL;
447 unsigned char ps_padded_key[256];
448 unsigned char *ps_value;
449 size_t i_value_size;
450 int i_err;
451
452 /* Add RSA-OAES-SHA1 padding */
453 i_err = AddOaepPadding( p_this,
454 ps_padded_key, sizeof( ps_padded_key ),
455 p_sys->ps_aes_key, sizeof( p_sys->ps_aes_key ),
456 NULL, 0 );
457 if ( i_err != VLC_SUCCESS )
458 goto error;
459 i_err = VLC_EGENERIC;
460
461 /* Read public key */
462 i_gcrypt_err = gcry_mpi_scan( &mpi_pubkey, GCRYMPI_FMT_USG,
463 ps_raop_rsa_pubkey,
464 sizeof( ps_raop_rsa_pubkey ) - 1, NULL );
465 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
466 goto error;
467
468 /* Read exponent */
469 i_gcrypt_err = gcry_mpi_scan( &mpi_exp, GCRYMPI_FMT_USG, ps_raop_rsa_exp,
470 sizeof( ps_raop_rsa_exp ) - 1, NULL );
471 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
472 goto error;
473
474 /* If the input data starts with a set bit (0x80), gcrypt thinks it's a
475 * signed integer and complains. Prefixing it with a zero byte (\0)
476 * works, but involves more work. Converting it to an MPI in our code is
477 * cleaner.
478 */
479 i_gcrypt_err = gcry_mpi_scan( &mpi_input, GCRYMPI_FMT_USG,
480 ps_padded_key, sizeof( ps_padded_key ),
481 NULL);
482 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
483 goto error;
484
485 /* Build S-expression with RSA parameters */
486 i_gcrypt_err = gcry_sexp_build( &sexp_rsa_params, NULL,
487 "(public-key(rsa(n %m)(e %m)))",
488 mpi_pubkey, mpi_exp );
489 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
490 goto error;
491
492 /* Build S-expression for data */
493 i_gcrypt_err = gcry_sexp_build( &sexp_input, NULL, "(data(value %m))",
494 mpi_input );
495 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
496 goto error;
497
498 /* Encrypt data */
499 i_gcrypt_err = gcry_pk_encrypt( &sexp_encrypted, sexp_input,
500 sexp_rsa_params );
501 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
502 goto error;
503
504 /* Extract encrypted data */
505 sexp_token_a = gcry_sexp_find_token( sexp_encrypted, "a", 0 );
506 if ( !sexp_token_a )
507 {
508 msg_Err( p_this , "Token 'a' not found in result S-expression" );
509 goto error;
510 }
511
512 mpi_output = gcry_sexp_nth_mpi( sexp_token_a, 1, GCRYMPI_FMT_USG );
513 if ( !mpi_output )
514 {
515 msg_Err( p_this, "Unable to extract MPI from result" );
516 goto error;
517 }
518
519 /* Copy encrypted data into char array */
520 i_gcrypt_err = gcry_mpi_aprint( GCRYMPI_FMT_USG, &ps_value, &i_value_size,
521 mpi_output );
522 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
523 {
524 goto error;
525 }
526
527 /* Encode in Base64 */
528 *result = vlc_b64_encode_binary( ps_value, i_value_size );
529 i_err = VLC_SUCCESS;
530
531 error:
532 gcry_sexp_release( sexp_rsa_params );
533 gcry_sexp_release( sexp_input );
534 gcry_sexp_release( sexp_encrypted );
535 gcry_sexp_release( sexp_token_a );
536 gcry_mpi_release( mpi_pubkey );
537 gcry_mpi_release( mpi_exp );
538 gcry_mpi_release( mpi_input );
539 gcry_mpi_release( mpi_output );
540
541 return i_err;
542 }
543
544 static char *ReadPasswordFile( vlc_object_t *p_this, const char *psz_path )
545 {
546 FILE *p_file = NULL;
547 char *psz_password = NULL;
548 char *psz_newline;
549 char ps_buffer[256];
550
551 p_file = vlc_fopen( psz_path, "rt" );
552 if ( p_file == NULL )
553 {
554 msg_Err( p_this, "Unable to open password file '%s': %m", psz_path );
555 goto error;
556 }
557
558 /* Read one line only */
559 if ( fgets( ps_buffer, sizeof( ps_buffer ), p_file ) == NULL )
560 {
561 if ( ferror( p_file ) )
562 {
563 msg_Err( p_this, "Error reading '%s': %m", psz_path );
564 goto error;
565 }
566
567 /* Nothing was read, but there was no error either. Maybe the file is
568 * empty. Not all implementations of fgets(3) write \0 to the output
569 * buffer in this case.
570 */
571 ps_buffer[0] = '\0';
572
573 } else {
574 /* Replace first newline with '\0' */
575 psz_newline = strchr( ps_buffer, '\n' );
576 if ( psz_newline != NULL )
577 *psz_newline = '\0';
578 }
579
580 if ( *ps_buffer == '\0' ) {
581 msg_Err( p_this, "No password could be read from '%s'", psz_path );
582 goto error;
583 }
584
585 psz_password = strdup( ps_buffer );
586
587 error:
588 if ( p_file != NULL )
589 fclose( p_file );
590
591 return psz_password;
592 }
593
594 /* Splits the value of a received header.
595 *
596 * Example: "Transport: RTP/AVP/TCP;unicast;mode=record;server_port=6000"
597 */
598 static int SplitHeader( char **ppsz_next, char **ppsz_name,
599 char **ppsz_value )
600 {
601 /* Find semicolon (separator between assignments) */
602 *ppsz_name = strsep( ppsz_next, psz_delim_semicolon );
603 if ( *ppsz_name )
604 {
605 /* Skip spaces */
606 *ppsz_name += strspn( *ppsz_name, psz_delim_space );
607
608 /* Get value */
609 *ppsz_value = *ppsz_name;
610 strsep( ppsz_value, psz_delim_equal );
611 }
612 else
613 *ppsz_value = NULL;
614
615 return !!*ppsz_name;
616 }
617
618 static void FreeHeader( void *p_value, void *p_data )
619 {
620 VLC_UNUSED( p_data );
621 free( p_value );
622 }
623
624 static int ReadStatusLine( vlc_object_t *p_this )
625 {
626 sout_stream_t *p_stream = (sout_stream_t*)p_this;
627 sout_stream_sys_t *p_sys = p_stream->p_sys;
628 char *psz_line = NULL;
629 char *psz_token;
630 char *psz_next;
631 int i_result = VLC_EGENERIC;
632
633 p_sys->psz_last_status_line = net_Gets( p_this, p_sys->i_control_fd,
634 NULL );
635 if ( !p_sys->psz_last_status_line )
636 goto error;
637
638 /* Create working copy */
639 psz_line = strdup( p_sys->psz_last_status_line );
640 psz_next = psz_line;
641
642 /* Protocol field */
643 psz_token = strsep( &psz_next, psz_delim_space );
644 if ( !psz_token || strncmp( psz_token, "RTSP/1.", 7 ) != 0 )
645 {
646 msg_Err( p_this, "Unknown protocol (%s)",
647 p_sys->psz_last_status_line );
648 goto error;
649 }
650
651 /* Status field */
652 psz_token = strsep( &psz_next, psz_delim_space );
653 if ( !psz_token )
654 {
655 msg_Err( p_this, "Request failed (%s)",
656 p_sys->psz_last_status_line );
657 goto error;
658 }
659
660 i_result = atoi( psz_token );
661
662 error:
663 free( psz_line );
664
665 return i_result;
666 }
667
668 static int ReadHeader( vlc_object_t *p_this,
669 vlc_dictionary_t *p_resp_headers,
670 int *done )
671 {
672 sout_stream_t *p_stream = (sout_stream_t*)p_this;
673 sout_stream_sys_t *p_sys = p_stream->p_sys;
674 char *psz_original = NULL;
675 char *psz_line = NULL;
676 char *psz_token;
677 char *psz_next;
678 char *psz_name;
679 char *psz_value;
680 int i_err = VLC_SUCCESS;
681
682 psz_line = net_Gets( p_this, p_sys->i_control_fd, NULL );
683 if ( !psz_line )
684 {
685 i_err = VLC_EGENERIC;
686 goto error;
687 }
688
689 /* Empty line for response end */
690 if ( psz_line[0] == '\0' )
691 *done = 1;
692 else
693 {
694 psz_original = strdup( psz_line );
695 psz_next = psz_line;
696
697 psz_token = strsep( &psz_next, psz_delim_colon );
698 if ( !psz_token || psz_next[0] != ' ' )
699 {
700 msg_Err( p_this, "Invalid header format (%s)", psz_original );
701 i_err = VLC_EGENERIC;
702 goto error;
703 }
704
705 psz_name = psz_token;
706 psz_value = psz_next + 1;
707
708 vlc_dictionary_insert( p_resp_headers, psz_name, strdup( psz_value ) );
709 }
710
711 error:
712 free( psz_original );
713 free( psz_line );
714
715 return i_err;
716 }
717
718 static int WriteAuxHeaders( vlc_object_t *p_this,
719 vlc_dictionary_t *p_req_headers )
720 {
721 sout_stream_t *p_stream = (sout_stream_t*)p_this;
722 sout_stream_sys_t *p_sys = p_stream->p_sys;
723 char **ppsz_keys = NULL;
724 char *psz_key;
725 char *psz_value;
726 int i_err = VLC_SUCCESS;
727 int i_rc;
728 size_t i;
729
730 ppsz_keys = vlc_dictionary_all_keys( p_req_headers );
731 for ( i = 0; ppsz_keys[i]; ++i )
732 {
733 psz_key = ppsz_keys[i];
734 psz_value = vlc_dictionary_value_for_key( p_req_headers, psz_key );
735
736 i_rc = net_Printf( p_this, p_sys->i_control_fd, NULL,
737 "%s: %s\r\n", psz_key, psz_value );
738 if ( i_rc < 0 )
739 {
740 i_err = VLC_EGENERIC;
741 goto error;
742 }
743 }
744
745 error:
746 for ( i = 0; ppsz_keys[i]; ++i )
747 free( ppsz_keys[i] );
748 free( ppsz_keys );
749
750 return i_err;
751 }
752
753 static int SendRequest( vlc_object_t *p_this, const char *psz_method,
754 const char *psz_content_type, const char *psz_body,
755 vlc_dictionary_t *p_req_headers )
756 {
757 sout_stream_t *p_stream = (sout_stream_t*)p_this;
758 sout_stream_sys_t *p_sys = p_stream->p_sys;
759 const unsigned char psz_headers_end[] = "\r\n";
760 size_t i_body_length = 0;
761 int i_err = VLC_SUCCESS;
762 int i_rc;
763
764 i_rc = net_Printf( p_this, p_sys->i_control_fd, NULL,
765 "%s %s RTSP/1.0\r\n"
766 "User-Agent: " RAOP_USER_AGENT "\r\n"
767 "Client-Instance: %s\r\n"
768 "CSeq: %d\r\n",
769 psz_method, p_sys->psz_url,
770 p_sys->psz_client_instance,
771 ++p_sys->i_cseq );
772 if ( i_rc < 0 )
773 {
774 i_err = VLC_EGENERIC;
775 goto error;
776 }
777
778 if ( psz_content_type )
779 {
780 i_rc = net_Printf( p_this, p_sys->i_control_fd, NULL,
781 "Content-Type: %s\r\n", psz_content_type );
782 if ( i_rc < 0 )
783 {
784 i_err = VLC_ENOMEM;
785 goto error;
786 }
787 }
788
789 if ( psz_body )
790 {
791 i_body_length = strlen( psz_body );
792
793 i_rc = net_Printf( p_this, p_sys->i_control_fd, NULL,
794 "Content-Length: %u\r\n",
795 (unsigned int)i_body_length );
796 if ( i_rc < 0 )
797 {
798 i_err = VLC_ENOMEM;
799 goto error;
800 }
801 }
802
803 i_err = WriteAuxHeaders( p_this, p_req_headers );
804 if ( i_err != VLC_SUCCESS )
805 goto error;
806
807 i_rc = net_Write( p_this, p_sys->i_control_fd, NULL,
808 psz_headers_end, sizeof( psz_headers_end ) - 1 );
809 if ( i_rc < 0 )
810 {
811 i_err = VLC_ENOMEM;
812 goto error;
813 }
814
815 if ( psz_body )
816 net_Write( p_this, p_sys->i_control_fd, NULL,
817 psz_body, i_body_length );
818
819 error:
820 return i_err;
821 }
822
823 static int ParseAuthenticateHeader( vlc_object_t *p_this,
824 vlc_dictionary_t *p_resp_headers )
825 {
826 sout_stream_t *p_stream = (sout_stream_t*)p_this;
827 sout_stream_sys_t *p_sys = p_stream->p_sys;
828 char *psz_auth;
829 int i_err = VLC_SUCCESS;
830
831 psz_auth = vlc_dictionary_value_for_key( p_resp_headers,
832 "WWW-Authenticate" );
833 if ( psz_auth == NULL )
834 {
835 msg_Err( p_this, "HTTP 401 response missing "
836 "WWW-Authenticate header" );
837 i_err = VLC_EGENERIC;
838 goto error;
839 }
840
841 http_auth_ParseWwwAuthenticateHeader( p_this, &p_sys->auth, psz_auth );
842
843 error:
844 return i_err;
845 }
846
847 static int ExecRequest( vlc_object_t *p_this, const char *psz_method,
848 const char *psz_content_type, const char *psz_body,
849 vlc_dictionary_t *p_req_headers,
850 vlc_dictionary_t *p_resp_headers )
851 {
852 sout_stream_t *p_stream = (sout_stream_t*)p_this;
853 sout_stream_sys_t *p_sys = p_stream->p_sys;
854 char *psz_authorization = NULL;
855 int headers_done;
856 int i_err = VLC_SUCCESS;
857 int i_status;
858 int i_auth_state;
859
860 if ( p_sys->i_control_fd < 0 )
861 {
862 msg_Err( p_this, "Control connection not open" );
863 i_err = VLC_EGENERIC;
864 goto error;
865 }
866
867 i_auth_state = 0;
868 while ( 1 )
869 {
870 /* Send header only when Digest authentication is used */
871 if ( p_sys->psz_password != NULL && p_sys->auth.psz_nonce != NULL )
872 {
873 FREENULL( psz_authorization );
874
875 psz_authorization =
876 http_auth_FormatAuthorizationHeader( p_this, &p_sys->auth,
877 psz_method,
878 p_sys->psz_url, "",
879 p_sys->psz_password );
880 if ( psz_authorization == NULL )
881 {
882 i_err = VLC_EGENERIC;
883 goto error;
884 }
885
886 vlc_dictionary_insert( p_req_headers, "Authorization",
887 psz_authorization );
888 }
889
890 /* Send request */
891 i_err = SendRequest( p_this, psz_method, psz_content_type, psz_body,
892 p_req_headers);
893 if ( i_err != VLC_SUCCESS )
894 goto error;
895
896 /* Read status line */
897 i_status = ReadStatusLine( p_this );
898 if ( i_status < 0 )
899 {
900 i_err = i_status;
901 goto error;
902 }
903
904 vlc_dictionary_clear( p_resp_headers, FreeHeader, NULL );
905
906 /* Read headers */
907 headers_done = 0;
908 while ( !headers_done )
909 {
910 i_err = ReadHeader( p_this, p_resp_headers, &headers_done );
911 if ( i_err != VLC_SUCCESS )
912 goto error;
913 }
914
915 if ( i_status == 200 )
916 /* Request successful */
917 break;
918 else if ( i_status == 401 )
919 {
920 /* Authorization required */
921 if ( i_auth_state == 1 || p_sys->psz_password == NULL )
922 {
923 msg_Err( p_this, "Access denied, password invalid" );
924 i_err = VLC_EGENERIC;
925 goto error;
926 }
927
928 i_err = ParseAuthenticateHeader( p_this, p_resp_headers );
929 if ( i_err != VLC_SUCCESS )
930 goto error;
931
932 i_auth_state = 1;
933 }
934 else
935 {
936 msg_Err( p_this, "Request failed (%s), status is %d",
937 p_sys->psz_last_status_line, i_status );
938 i_err = VLC_EGENERIC;
939 goto error;
940 }
941 }
942
943 error:
944 FREENULL( p_sys->psz_last_status_line );
945 free( psz_authorization );
946
947 return i_err;
948 }
949
950 static int AnnounceSDP( vlc_object_t *p_this, char *psz_local,
951 uint32_t i_session_id )
952 {
953 sout_stream_t *p_stream = (sout_stream_t*)p_this;
954 sout_stream_sys_t *p_sys = p_stream->p_sys;
955 vlc_dictionary_t req_headers;
956 vlc_dictionary_t resp_headers;
957 unsigned char ps_sac[16];
958 char *psz_sdp = NULL;
959 char *psz_sac_base64 = NULL;
960 char *psz_aes_key_base64 = NULL;
961 char *psz_aes_iv_base64 = NULL;
962 int i_err = VLC_SUCCESS;
963 int i_rc;
964
965 vlc_dictionary_init( &req_headers, 0 );
966 vlc_dictionary_init( &resp_headers, 0 );
967
968 /* Encrypt AES key and encode it in Base64 */
969 i_rc = EncryptAesKeyBase64( p_this, &psz_aes_key_base64 );
970 if ( i_rc != VLC_SUCCESS || psz_aes_key_base64 == NULL )
971 {
972 i_err = VLC_EGENERIC;
973 goto error;
974 }
975 RemoveBase64Padding( psz_aes_key_base64 );
976
977 /* Encode AES IV in Base64 */
978 psz_aes_iv_base64 = vlc_b64_encode_binary( p_sys->ps_aes_iv,
979 sizeof( p_sys->ps_aes_iv ) );
980 if ( psz_aes_iv_base64 == NULL )
981 {
982 i_err = VLC_EGENERIC;
983 goto error;
984 }
985 RemoveBase64Padding( psz_aes_iv_base64 );
986
987 /* Random bytes for Apple-Challenge header */
988 gcry_randomize( ps_sac, sizeof( ps_sac ), GCRY_STRONG_RANDOM );
989
990 psz_sac_base64 = vlc_b64_encode_binary( ps_sac, sizeof( ps_sac ) );
991 if ( psz_sac_base64 == NULL )
992 {
993 i_err = VLC_EGENERIC;
994 goto error;
995 }
996 RemoveBase64Padding( psz_sac_base64 );
997
998 /* Build SDP
999 * Note: IPv6 addresses also use "IP4". Make sure not to include the
1000 * scope ID.
1001 */
1002 i_rc = asprintf( &psz_sdp,
1003 "v=0\r\n"
1004 "o=iTunes %u 0 IN IP4 %s\r\n"
1005 "s=iTunes\r\n"
1006 "c=IN IP4 %s\r\n"
1007 "t=0 0\r\n"
1008 "m=audio 0 RTP/AVP 96\r\n"
1009 "a=rtpmap:96 AppleLossless\r\n"
1010 "a=fmtp:96 4096 0 16 40 10 14 2 255 0 0 44100\r\n"
1011 "a=rsaaeskey:%s\r\n"
1012 "a=aesiv:%s\r\n",
1013 i_session_id, psz_local, p_sys->psz_host,
1014 psz_aes_key_base64, psz_aes_iv_base64 );
1015
1016 if ( i_rc < 0 )
1017 {
1018 i_err = VLC_ENOMEM;
1019 goto error;
1020 }
1021
1022 /* Build and send request */
1023 vlc_dictionary_insert( &req_headers, "Apple-Challenge", psz_sac_base64 );
1024
1025 i_err = ExecRequest( p_this, "ANNOUNCE", "application/sdp", psz_sdp,
1026 &req_headers, &resp_headers);
1027 if ( i_err != VLC_SUCCESS )
1028 goto error;
1029
1030 error:
1031 vlc_dictionary_clear( &req_headers, NULL, NULL );
1032 vlc_dictionary_clear( &resp_headers, FreeHeader, NULL );
1033
1034 free( psz_sdp );
1035 free( psz_sac_base64 );
1036 free( psz_aes_key_base64 );
1037 free( psz_aes_iv_base64 );
1038
1039 return i_err;
1040 }
1041
1042 static int SendSetup( vlc_object_t *p_this )
1043 {
1044 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1045 sout_stream_sys_t *p_sys = p_stream->p_sys;
1046 vlc_dictionary_t req_headers;
1047 vlc_dictionary_t resp_headers;
1048 int i_err = VLC_SUCCESS;
1049 char *psz_tmp;
1050 char *psz_next;
1051 char *psz_name;
1052 char *psz_value;
1053
1054 vlc_dictionary_init( &req_headers, 0 );
1055 vlc_dictionary_init( &resp_headers, 0 );
1056
1057 vlc_dictionary_insert( &req_headers, "Transport",
1058 ((void*)"RTP/AVP/TCP;unicast;interleaved=0-1;"
1059 "mode=record") );
1060
1061 i_err = ExecRequest( p_this, "SETUP", NULL, NULL,
1062 &req_headers, &resp_headers );
1063 if ( i_err != VLC_SUCCESS )
1064 goto error;
1065
1066 psz_tmp = vlc_dictionary_value_for_key( &resp_headers, "Session" );
1067 if ( !psz_tmp )
1068 {
1069 msg_Err( p_this, "Missing 'Session' header during setup" );
1070 i_err = VLC_EGENERIC;
1071 goto error;
1072 }
1073
1074 free( p_sys->psz_session );
1075 p_sys->psz_session = strdup( psz_tmp );
1076
1077 /* Get server_port */
1078 psz_next = vlc_dictionary_value_for_key( &resp_headers, "Transport" );
1079 while ( SplitHeader( &psz_next, &psz_name, &psz_value ) )
1080 {
1081 if ( psz_value && strcmp( psz_name, "server_port" ) == 0 )
1082 {
1083 p_sys->i_server_port = atoi( psz_value );
1084 break;
1085 }
1086 }
1087
1088 if ( !p_sys->i_server_port )
1089 {
1090 msg_Err( p_this, "Missing 'server_port' during setup" );
1091 i_err = VLC_EGENERIC;
1092 goto error;
1093 }
1094
1095 /* Get jack type */
1096 psz_next = vlc_dictionary_value_for_key( &resp_headers,
1097 "Audio-Jack-Status" );
1098 while ( SplitHeader( &psz_next, &psz_name, &psz_value ) )
1099 {
1100 if ( strcmp( psz_name, "type" ) != 0 )
1101 continue;
1102
1103 if ( strcmp( psz_value, "analog" ) == 0 )
1104 p_sys->i_jack_type = JACK_TYPE_ANALOG;
1105
1106 else if ( strcmp( psz_value, "digital" ) == 0 )
1107 p_sys->i_jack_type = JACK_TYPE_DIGITAL;
1108
1109 break;
1110 }
1111
1112 error:
1113 vlc_dictionary_clear( &req_headers, NULL, NULL );
1114 vlc_dictionary_clear( &resp_headers, FreeHeader, NULL );
1115
1116 return i_err;
1117 }
1118
1119 static int SendRecord( vlc_object_t *p_this )
1120 {
1121 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1122 sout_stream_sys_t *p_sys = p_stream->p_sys;
1123 vlc_dictionary_t req_headers;
1124 vlc_dictionary_t resp_headers;
1125 int i_err = VLC_SUCCESS;
1126 char *psz_value;
1127
1128 vlc_dictionary_init( &req_headers, 0 );
1129 vlc_dictionary_init( &resp_headers, 0 );
1130
1131 vlc_dictionary_insert( &req_headers, "Range", (void *)"npt=0-" );
1132 vlc_dictionary_insert( &req_headers, "RTP-Info",
1133 (void *)"seq=0;rtptime=0" );
1134 vlc_dictionary_insert( &req_headers, "Session",
1135 (void *)p_sys->psz_session );
1136
1137 i_err = ExecRequest( p_this, "RECORD", NULL, NULL,
1138 &req_headers, &resp_headers );
1139 if ( i_err != VLC_SUCCESS )
1140 goto error;
1141
1142 psz_value = vlc_dictionary_value_for_key( &resp_headers, "Audio-Latency" );
1143 if ( psz_value )
1144 p_sys->i_audio_latency = atoi( psz_value );
1145 else
1146 p_sys->i_audio_latency = 0;
1147
1148 error:
1149 vlc_dictionary_clear( &req_headers, NULL, NULL );
1150 vlc_dictionary_clear( &resp_headers, FreeHeader, NULL );
1151
1152 return i_err;
1153 }
1154
1155 static int SendFlush( vlc_object_t *p_this )
1156 {
1157 VLC_UNUSED( p_this );
1158 vlc_dictionary_t resp_headers;
1159 vlc_dictionary_t req_headers;
1160 int i_err = VLC_SUCCESS;
1161
1162 vlc_dictionary_init( &req_headers, 0 );
1163 vlc_dictionary_init( &resp_headers, 0 );
1164
1165 vlc_dictionary_insert( &req_headers, "RTP-Info",
1166 (void *)"seq=0;rtptime=0" );
1167
1168 i_err = ExecRequest( p_this, "FLUSH", NULL, NULL,
1169 &req_headers, &resp_headers );
1170 if ( i_err != VLC_SUCCESS )
1171 goto error;
1172
1173 error:
1174 vlc_dictionary_clear( &req_headers, NULL, NULL );
1175 vlc_dictionary_clear( &resp_headers, FreeHeader, NULL );
1176
1177 return i_err;
1178 }
1179
1180 static int SendTeardown( vlc_object_t *p_this )
1181 {
1182 vlc_dictionary_t resp_headers;
1183 vlc_dictionary_t req_headers;
1184 int i_err = VLC_SUCCESS;
1185
1186 vlc_dictionary_init( &req_headers, 0 );
1187 vlc_dictionary_init( &resp_headers, 0 );
1188
1189 i_err = ExecRequest( p_this, "TEARDOWN", NULL, NULL,
1190 &req_headers, &resp_headers );
1191 if ( i_err != VLC_SUCCESS )
1192 goto error;
1193
1194 error:
1195 vlc_dictionary_clear( &req_headers, NULL, NULL );
1196 vlc_dictionary_clear( &resp_headers, FreeHeader, NULL );
1197
1198 return i_err;
1199 }
1200
1201 static int UpdateVolume( vlc_object_t *p_this )
1202 {
1203 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1204 sout_stream_sys_t *p_sys = p_stream->p_sys;
1205 vlc_dictionary_t req_headers;
1206 vlc_dictionary_t resp_headers;
1207 char *psz_parameters = NULL;
1208 double d_volume;
1209 int i_err = VLC_SUCCESS;
1210 int i_rc;
1211
1212 vlc_dictionary_init( &req_headers, 0 );
1213 vlc_dictionary_init( &resp_headers, 0 );
1214
1215 /* Our volume is 0..255, RAOP is -144..0 (-144 off, -30..0 on) */
1216
1217 /* Limit range */
1218 p_sys->i_volume = __MAX( 0, __MIN( p_sys->i_volume, 255 ) );
1219
1220 if ( p_sys->i_volume == 0 )
1221 d_volume = -144.0;
1222 else
1223 d_volume = -30 + ( ( (double)p_sys->i_volume ) * 30.0 / 255.0 );
1224
1225 /* Format without using locales */
1226 i_rc = us_asprintf( &psz_parameters, "volume: %0.6f\r\n", d_volume );
1227 if ( i_rc < 0 )
1228 {
1229 i_err = VLC_ENOMEM;
1230 goto error;
1231 }
1232
1233 vlc_dictionary_insert( &req_headers, "Session",
1234 (void *)p_sys->psz_session );
1235
1236 i_err = ExecRequest( p_this, "SET_PARAMETER",
1237 "text/parameters", psz_parameters,
1238 &req_headers, &resp_headers );
1239 if ( i_err != VLC_SUCCESS )
1240 goto error;
1241
1242 error:
1243 vlc_dictionary_clear( &req_headers, NULL, NULL );
1244 vlc_dictionary_clear( &resp_headers, FreeHeader, NULL );
1245 free( psz_parameters );
1246
1247 return i_err;
1248 }
1249
1250 static void LogInfo( vlc_object_t *p_this )
1251 {
1252 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1253 sout_stream_sys_t *p_sys = p_stream->p_sys;
1254 const char *psz_jack_name;
1255
1256 msg_Info( p_this, "Audio latency: %d", p_sys->i_audio_latency );
1257
1258 switch ( p_sys->i_jack_type )
1259 {
1260 case JACK_TYPE_ANALOG:
1261 psz_jack_name = "analog";
1262 break;
1263
1264 case JACK_TYPE_DIGITAL:
1265 psz_jack_name = "digital";
1266 break;
1267
1268 case JACK_TYPE_NONE:
1269 default:
1270 psz_jack_name = "none";
1271 break;
1272 }
1273
1274 msg_Info( p_this, "Jack type: %s", psz_jack_name );
1275 }
1276
1277 static void SendAudio( sout_stream_t *p_stream, block_t *p_buffer )
1278 {
1279 sout_stream_sys_t *p_sys = p_stream->p_sys;
1280 gcry_error_t i_gcrypt_err;
1281 block_t *p_next;
1282 size_t i_len;
1283 size_t i_payload_len;
1284 size_t i_realloc_len;
1285 int rc;
1286
1287 const uint8_t header[16] = {
1288 0x24, 0x00, 0x00, 0x00,
1289 0xf0, 0xff, 0x00, 0x00,
1290 0x00, 0x00, 0x00, 0x00,
1291 0x00, 0x00, 0x00, 0x00,
1292 };
1293
1294 while ( p_buffer )
1295 {
1296 i_len = sizeof( header ) + p_buffer->i_buffer;
1297
1298 /* Buffer resize needed? */
1299 if ( i_len > p_sys->i_sendbuf_len || p_sys->p_sendbuf == NULL )
1300 {
1301 /* Grow in blocks of 4K */
1302 i_realloc_len = (1 + (i_len / 4096)) * 4096;
1303
1304 p_sys->p_sendbuf = realloc_or_free( p_sys->p_sendbuf, i_realloc_len );
1305 if ( p_sys->p_sendbuf == NULL )
1306 goto error;
1307
1308 p_sys->i_sendbuf_len = i_realloc_len;
1309 }
1310
1311 /* Fill buffer */
1312 memcpy( p_sys->p_sendbuf, header, sizeof( header ) );
1313 memcpy( p_sys->p_sendbuf + sizeof( header ),
1314 p_buffer->p_buffer, p_buffer->i_buffer );
1315
1316 /* Calculate payload length and update header */
1317 i_payload_len = i_len - 4;
1318 if ( i_payload_len > 0xffff )
1319 {
1320 msg_Err( p_stream, "Buffer is too long (%u bytes)",
1321 (unsigned int)i_payload_len );
1322 goto error;
1323 }
1324
1325 p_sys->p_sendbuf[2] = ( i_payload_len >> 8 ) & 0xff;
1326 p_sys->p_sendbuf[3] = i_payload_len & 0xff;
1327
1328 /* Reset cipher */
1329 i_gcrypt_err = gcry_cipher_reset( p_sys->aes_ctx );
1330 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
1331 goto error;
1332
1333 /* Set IV */
1334 i_gcrypt_err = gcry_cipher_setiv( p_sys->aes_ctx, p_sys->ps_aes_iv,
1335 sizeof( p_sys->ps_aes_iv ) );
1336 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
1337 goto error;
1338
1339 /* Encrypt in place. Only full blocks of 16 bytes are encrypted,
1340 * the rest (0-15 bytes) is left unencrypted.
1341 */
1342 i_gcrypt_err =
1343 gcry_cipher_encrypt( p_sys->aes_ctx,
1344 p_sys->p_sendbuf + sizeof( header ),
1345 ( p_buffer->i_buffer / 16 ) * 16,
1346 NULL, 0 );
1347 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
1348 goto error;
1349
1350 /* Send data */
1351 rc = net_Write( p_stream, p_sys->i_stream_fd, NULL,
1352 p_sys->p_sendbuf, i_len );
1353 if ( rc < 0 )
1354 goto error;
1355
1356 p_next = p_buffer->p_next;
1357 block_Release( p_buffer );
1358 p_buffer = p_next;
1359 }
1360
1361 error:
1362 block_ChainRelease( p_buffer );
1363 return;
1364 }
1365
1366
1367 /*****************************************************************************
1368 * Open:
1369 *****************************************************************************/
1370 static int Open( vlc_object_t *p_this )
1371 {
1372 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1373 sout_stream_sys_t *p_sys;
1374 char psz_local[NI_MAXNUMERICHOST];
1375 char *psz_pwfile = NULL;
1376 gcry_error_t i_gcrypt_err;
1377 int i_err = VLC_SUCCESS;
1378 uint32_t i_session_id;
1379 uint64_t i_client_instance;
1380
1381 vlc_gcrypt_init();
1382
1383 config_ChainParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
1384 p_stream->p_cfg );
1385
1386 p_sys = calloc( 1, sizeof( *p_sys ) );
1387 if ( p_sys == NULL )
1388 {
1389 i_err = VLC_ENOMEM;
1390 goto error;
1391 }
1392
1393 p_stream->p_sys = p_sys;
1394 p_stream->pf_add = Add;
1395 p_stream->pf_del = Del;
1396 p_stream->pf_send = Send;
1397 p_stream->p_sout->i_out_pace_nocontrol++;
1398
1399 p_sys->i_control_fd = -1;
1400 p_sys->i_stream_fd = -1;
1401 p_sys->i_volume = var_GetInteger( p_stream, SOUT_CFG_PREFIX "volume");
1402 p_sys->i_jack_type = JACK_TYPE_NONE;
1403
1404 http_auth_Init( &p_sys->auth );
1405
1406 p_sys->psz_host = var_GetNonEmptyString( p_stream,
1407 SOUT_CFG_PREFIX "host" );
1408 if ( p_sys->psz_host == NULL )
1409 {
1410 msg_Err( p_this, "Missing host" );
1411 i_err = VLC_EGENERIC;
1412 goto error;
1413 }
1414
1415 p_sys->psz_password = var_GetNonEmptyString( p_stream,
1416 SOUT_CFG_PREFIX "password" );
1417 if ( p_sys->psz_password == NULL )
1418 {
1419 /* Try password file instead */
1420 psz_pwfile = var_GetNonEmptyString( p_stream,
1421 SOUT_CFG_PREFIX "password-file" );
1422 if ( psz_pwfile != NULL )
1423 {
1424 p_sys->psz_password = ReadPasswordFile( p_this, psz_pwfile );
1425 if ( p_sys->psz_password == NULL )
1426 {
1427 i_err = VLC_EGENERIC;
1428 goto error;
1429 }
1430 }
1431 }
1432
1433 if ( p_sys->psz_password != NULL )
1434 msg_Info( p_this, "Using password authentication" );
1435
1436 var_AddCallback( p_stream, SOUT_CFG_PREFIX "volume",
1437 VolumeCallback, NULL );
1438 p_sys->b_volume_callback = true;
1439
1440 /* Open control connection */
1441 p_sys->i_control_fd = net_ConnectTCP( p_stream, p_sys->psz_host,
1442 RAOP_PORT );
1443 if ( p_sys->i_control_fd < 0 )
1444 {
1445 msg_Err( p_this, "Cannot establish control connection to %s:%d (%m)",
1446 p_sys->psz_host, RAOP_PORT );
1447 i_err = VLC_EGENERIC;
1448 goto error;
1449 }
1450
1451 /* Get local IP address */
1452 if ( net_GetSockAddress( p_sys->i_control_fd, psz_local, NULL ) )
1453 {
1454 msg_Err( p_this, "cannot get local IP address" );
1455 i_err = VLC_EGENERIC;
1456 goto error;
1457 }
1458
1459 /* Random session ID */
1460 gcry_randomize( &i_session_id, sizeof( i_session_id ),
1461 GCRY_STRONG_RANDOM );
1462
1463 /* Random client instance */
1464 gcry_randomize( &i_client_instance, sizeof( i_client_instance ),
1465 GCRY_STRONG_RANDOM );
1466 if ( asprintf( &p_sys->psz_client_instance, "%016"PRIX64,
1467 i_client_instance ) < 0 )
1468 {
1469 i_err = VLC_ENOMEM;
1470 goto error;
1471 }
1472
1473 /* Build session URL */
1474 if ( asprintf( &p_sys->psz_url, "rtsp://%s/%u",
1475 psz_local, i_session_id ) < 0 )
1476 {
1477 i_err = VLC_ENOMEM;
1478 goto error;
1479 }
1480
1481 /* Generate AES key and IV */
1482 gcry_randomize( p_sys->ps_aes_key, sizeof( p_sys->ps_aes_key ),
1483 GCRY_STRONG_RANDOM );
1484 gcry_randomize( p_sys->ps_aes_iv, sizeof( p_sys->ps_aes_iv ),
1485 GCRY_STRONG_RANDOM );
1486
1487 /* Setup AES */
1488 i_gcrypt_err = gcry_cipher_open( &p_sys->aes_ctx, GCRY_CIPHER_AES,
1489 GCRY_CIPHER_MODE_CBC, 0 );
1490 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
1491 {
1492 i_err = VLC_EGENERIC;
1493 goto error;
1494 }
1495
1496 /* Set key */
1497 i_gcrypt_err = gcry_cipher_setkey( p_sys->aes_ctx, p_sys->ps_aes_key,
1498 sizeof( p_sys->ps_aes_key ) );
1499 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
1500 {
1501 i_err = VLC_EGENERIC;
1502 goto error;
1503 }
1504
1505 /* Protocol handshake */
1506 i_err = AnnounceSDP( p_this, psz_local, i_session_id );
1507 if ( i_err != VLC_SUCCESS )
1508 goto error;
1509
1510 i_err = SendSetup( p_this );
1511 if ( i_err != VLC_SUCCESS )
1512 goto error;
1513
1514 i_err = SendRecord( p_this );
1515 if ( i_err != VLC_SUCCESS )
1516 goto error;
1517
1518 i_err = UpdateVolume( p_this );
1519 if ( i_err != VLC_SUCCESS )
1520 goto error;
1521
1522 LogInfo( p_this );
1523
1524 /* Open stream connection */
1525 p_sys->i_stream_fd = net_ConnectTCP( p_stream, p_sys->psz_host,
1526 p_sys->i_server_port );
1527 if ( p_sys->i_stream_fd < 0 )
1528 {
1529 msg_Err( p_this, "Cannot establish stream connection to %s:%d (%m)",
1530 p_sys->psz_host, p_sys->i_server_port );
1531 i_err = VLC_EGENERIC;
1532 goto error;
1533 }
1534
1535 error:
1536 free( psz_pwfile );
1537
1538 if ( i_err != VLC_SUCCESS )
1539 FreeSys( p_this, p_sys );
1540
1541 return i_err;
1542 }
1543
1544
1545 /*****************************************************************************
1546 * Close:
1547 *****************************************************************************/
1548 static void Close( vlc_object_t *p_this )
1549 {
1550 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1551 sout_stream_sys_t *p_sys = p_stream->p_sys;
1552
1553 SendFlush( p_this );
1554 SendTeardown( p_this );
1555
1556 FreeSys( p_this, p_sys );
1557
1558 p_stream->p_sout->i_out_pace_nocontrol--;
1559 }
1560
1561
1562 /*****************************************************************************
1563 * Add:
1564 *****************************************************************************/
1565 static sout_stream_id_t *Add( sout_stream_t *p_stream, es_format_t *p_fmt )
1566 {
1567 sout_stream_sys_t *p_sys = p_stream->p_sys;
1568 sout_stream_id_t *id = NULL;
1569
1570 id = calloc( 1, sizeof( *id ) );
1571 if ( id == NULL )
1572 goto error;
1573
1574 es_format_Copy( &id->fmt, p_fmt );
1575
1576 switch ( id->fmt.i_cat )
1577 {
1578 case AUDIO_ES:
1579 if ( id->fmt.i_codec == VLC_CODEC_ALAC )
1580 {
1581 if ( p_sys->p_audio_stream )
1582 {
1583 msg_Warn( p_stream, "Only the first Apple Lossless audio "
1584 "stream is used" );
1585 }
1586 else if ( id->fmt.audio.i_rate != 44100 ||
1587 id->fmt.audio.i_channels != 2 )
1588 {
1589 msg_Err( p_stream, "The Apple Lossless audio stream must be "
1590 "encoded with 44100 Hz and 2 channels" );
1591 }
1592 else
1593 {
1594 /* Use this stream */
1595 p_sys->p_audio_stream = id;
1596 }
1597 }
1598 else if ( !p_sys->b_alac_warning )
1599 {
1600 msg_Err( p_stream, "Apple Lossless is the only codec supported. "
1601 "Use the \"transcode\" module for conversion "
1602 "(e.g. \"transcode{acodec=alac,"
1603 "channels=2}\")." );
1604 p_sys->b_alac_warning = true;
1605 }
1606
1607 break;
1608
1609 default:
1610 /* Leave other stream types alone */
1611 break;
1612 }
1613
1614 return id;
1615
1616 error:
1617 FreeId( id );
1618
1619 return NULL;
1620 }
1621
1622
1623 /*****************************************************************************
1624 * Del:
1625 *****************************************************************************/
1626 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
1627 {
1628 sout_stream_sys_t *p_sys = p_stream->p_sys;
1629 int i_err = VLC_SUCCESS;
1630
1631 if ( p_sys->p_audio_stream == id )
1632 p_sys->p_audio_stream = NULL;
1633
1634 FreeId( id );
1635
1636 return i_err;
1637 }
1638
1639
1640 /*****************************************************************************
1641 * Send:
1642 *****************************************************************************/
1643 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
1644 block_t *p_buffer )
1645 {
1646 sout_stream_sys_t *p_sys = p_stream->p_sys;
1647
1648 if ( id->fmt.i_cat == AUDIO_ES && id == p_sys->p_audio_stream )
1649 {
1650 /* SendAudio takes care of releasing the buffers */
1651 SendAudio( p_stream, p_buffer );
1652 }
1653 else
1654 {
1655 block_ChainRelease( p_buffer );
1656 }
1657
1658 return VLC_SUCCESS;
1659 }
1660
1661
1662 /*****************************************************************************
1663 * VolumeCallback: called when the volume is changed on the fly.
1664 *****************************************************************************/
1665 static int VolumeCallback( vlc_object_t *p_this, char const *psz_cmd,
1666 vlc_value_t oldval, vlc_value_t newval,
1667 void *p_data )
1668 {
1669 VLC_UNUSED(psz_cmd);
1670 VLC_UNUSED(oldval);
1671 VLC_UNUSED(p_data);
1672 VLC_UNUSED(newval);
1673 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1674 sout_stream_sys_t *p_sys = p_stream->p_sys;
1675
1676 /* TODO: Implement volume change */
1677 VLC_UNUSED(p_sys);
1678
1679 return VLC_SUCCESS;
1680 }
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