1 /*****************************************************************************
2 * raop.c: Remote Audio Output Protocol streaming support
3 *****************************************************************************
4 * Copyright (C) 2008 the VideoLAN team
7 * Author: Michael Hanselmann
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.
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.
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 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
36 #include <vlc_common.h>
37 #include <vlc_plugin.h>
39 #include <vlc_block.h>
40 #include <vlc_network.h>
41 #include <vlc_strings.h>
42 #include <vlc_charset.h>
43 #include <vlc_gcrypt.h>
46 #define RAOP_PORT 5000
47 #define RAOP_USER_AGENT "VLC " VERSION
50 static const char ps_raop_rsa_pubkey[] =
51 "\xe7\xd7\x44\xf2\xa2\xe2\x78\x8b\x6c\x1f\x55\xa0\x8e\xb7\x05\x44"
52 "\xa8\xfa\x79\x45\xaa\x8b\xe6\xc6\x2c\xe5\xf5\x1c\xbd\xd4\xdc\x68"
53 "\x42\xfe\x3d\x10\x83\xdd\x2e\xde\xc1\xbf\xd4\x25\x2d\xc0\x2e\x6f"
54 "\x39\x8b\xdf\x0e\x61\x48\xea\x84\x85\x5e\x2e\x44\x2d\xa6\xd6\x26"
55 "\x64\xf6\x74\xa1\xf3\x04\x92\x9a\xde\x4f\x68\x93\xef\x2d\xf6\xe7"
56 "\x11\xa8\xc7\x7a\x0d\x91\xc9\xd9\x80\x82\x2e\x50\xd1\x29\x22\xaf"
57 "\xea\x40\xea\x9f\x0e\x14\xc0\xf7\x69\x38\xc5\xf3\x88\x2f\xc0\x32"
58 "\x3d\xd9\xfe\x55\x15\x5f\x51\xbb\x59\x21\xc2\x01\x62\x9f\xd7\x33"
59 "\x52\xd5\xe2\xef\xaa\xbf\x9b\xa0\x48\xd7\xb8\x13\xa2\xb6\x76\x7f"
60 "\x6c\x3c\xcf\x1e\xb4\xce\x67\x3d\x03\x7b\x0d\x2e\xa3\x0c\x5f\xff"
61 "\xeb\x06\xf8\xd0\x8a\xdd\xe4\x09\x57\x1a\x9c\x68\x9f\xef\x10\x72"
62 "\x88\x55\xdd\x8c\xfb\x9a\x8b\xef\x5c\x89\x43\xef\x3b\x5f\xaa\x15"
63 "\xdd\xe6\x98\xbe\xdd\xf3\x59\x96\x03\xeb\x3e\x6f\x61\x37\x2b\xb6"
64 "\x28\xf6\x55\x9f\x59\x9a\x78\xbf\x50\x06\x87\xaa\x7f\x49\x76\xc0"
65 "\x56\x2d\x41\x29\x56\xf8\x98\x9e\x18\xa6\x35\x5b\xd8\x15\x97\x82"
66 "\x5e\x0f\xc8\x75\x34\x3e\xc7\x82\x11\x76\x25\xcd\xbf\x98\x44\x7b";
68 static const char ps_raop_rsa_exp[] = "\x01\x00\x01";
70 static const char psz_delim_space[] = " ";
71 static const char psz_delim_colon[] = ":";
72 static const char psz_delim_equal[] = "=";
73 static const char psz_delim_semicolon[] = ";";
76 /*****************************************************************************
78 *****************************************************************************/
79 static int Open( vlc_object_t * );
80 static void Close( vlc_object_t * );
82 static sout_stream_id_t *Add( sout_stream_t *, es_format_t * );
83 static int Del( sout_stream_t *, sout_stream_id_t * );
84 static int Send( sout_stream_t *, sout_stream_id_t *, block_t* );
86 static int VolumeCallback( vlc_object_t *p_this, char const *psz_cmd,
87 vlc_value_t oldval, vlc_value_t newval,
97 struct sout_stream_sys_t
99 /* Input parameters */
105 sout_stream_id_t *p_audio_stream;
107 bool b_volume_callback;
109 /* Connection state */
113 uint8_t ps_aes_key[16];
114 uint8_t ps_aes_iv[16];
115 gcry_cipher_hd_t aes_ctx;
118 char *psz_client_instance;
120 char *psz_last_status_line;
128 size_t i_sendbuf_len;
132 struct sout_stream_id_t
138 /*****************************************************************************
140 *****************************************************************************/
141 #define SOUT_CFG_PREFIX "sout-raop-"
143 #define HOST_TEXT N_("Host")
144 #define HOST_LONGTEXT N_("Hostname or IP address of target device")
146 #define VOLUME_TEXT N_("Volume")
147 #define VOLUME_LONGTEXT N_("Output volume for analog output: 0 for silence, " \
148 "1..255 from almost silent to very loud.")
150 #define PASSWORD_TEXT N_("Password")
151 #define PASSWORD_LONGTEXT N_("Password for target device.")
153 #define PASSWORD_FILE_TEXT N_("Password file")
154 #define PASSWORD_FILE_LONGTEXT N_("Read password for target device from file.")
157 set_shortname( N_("RAOP") )
158 set_description( N_("Remote Audio Output Protocol stream output") )
159 set_capability( "sout stream", 0 )
160 add_shortcut( "raop" )
161 set_category( CAT_SOUT )
162 set_subcategory( SUBCAT_SOUT_STREAM )
163 add_string( SOUT_CFG_PREFIX "host", "", NULL,
164 HOST_TEXT, HOST_LONGTEXT, false )
165 add_password( SOUT_CFG_PREFIX "password", NULL, NULL,
166 PASSWORD_TEXT, PASSWORD_LONGTEXT, false )
167 add_file( SOUT_CFG_PREFIX "password-file", NULL, NULL,
168 PASSWORD_FILE_TEXT, PASSWORD_FILE_LONGTEXT, false )
169 add_integer_with_range( SOUT_CFG_PREFIX "volume", 100, 0, 255, NULL,
170 VOLUME_TEXT, VOLUME_LONGTEXT, false )
171 set_callbacks( Open, Close )
174 static const char *const ppsz_sout_options[] = {
183 /*****************************************************************************
185 *****************************************************************************/
186 static void FreeSys( vlc_object_t *p_this, sout_stream_sys_t *p_sys )
188 sout_stream_t *p_stream = (sout_stream_t*)p_this;
190 if ( p_sys->i_control_fd >= 0 )
191 net_Close( p_sys->i_control_fd );
192 if ( p_sys->i_stream_fd >= 0 )
193 net_Close( p_sys->i_stream_fd );
194 if ( p_sys->b_volume_callback )
195 var_DelCallback( p_stream, SOUT_CFG_PREFIX "volume",
196 VolumeCallback, NULL );
198 gcry_cipher_close( p_sys->aes_ctx );
200 free( p_sys->p_sendbuf );
201 free( p_sys->psz_host );
202 free( p_sys->psz_password );
203 free( p_sys->psz_url );
204 free( p_sys->psz_session );
205 free( p_sys->psz_client_instance );
206 free( p_sys->psz_last_status_line );
210 static void FreeId( sout_stream_id_t *id )
215 static void RemoveBase64Padding( char *str )
217 char *ps_pos = strchr( str, '=' );
218 if ( ps_pos != NULL )
222 static int CheckForGcryptErrorWithLine( sout_stream_t *p_stream,
223 gcry_error_t i_gcrypt_err,
224 unsigned int i_line )
226 if ( i_gcrypt_err != GPG_ERR_NO_ERROR )
228 msg_Err( p_stream, "gcrypt error (line %d): %s", i_line,
229 gpg_strerror( i_gcrypt_err ) );
236 /* Wrapper to pass line number for easier debugging */
237 #define CheckForGcryptError( p_this, i_gcrypt_err ) \
238 CheckForGcryptErrorWithLine( p_this, i_gcrypt_err, __LINE__ )
240 /* MGF1 is specified in RFC2437, section 10.2.1. Variables are named after the
243 static int MGF1( vlc_object_t *p_this,
244 unsigned char *mask, size_t l,
245 const unsigned char *Z, const size_t zLen,
248 sout_stream_t *p_stream = (sout_stream_t*)p_this;
249 gcry_error_t i_gcrypt_err;
250 gcry_md_hd_t md_handle = NULL;
252 unsigned char *ps_md;
253 uint32_t counter = 0;
256 int i_err = VLC_SUCCESS;
258 assert( mask != NULL );
261 hLen = gcry_md_get_algo_dlen( Hash );
263 i_gcrypt_err = gcry_md_open( &md_handle, Hash, 0 );
264 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
266 i_err = VLC_EGENERIC;
272 /* 3. For counter from 0 to \lceil{l / hLen}\rceil-1, do the following:
273 * a. Convert counter to an octet string C of length 4 with the
274 * primitive I2OSP: C = I2OSP (counter, 4)
276 C[0] = (counter >> 24) & 0xff;
277 C[1] = (counter >> 16) & 0xff;
278 C[2] = (counter >> 8) & 0xff;
279 C[3] = counter & 0xff;
282 /* b. Concatenate the hash of the seed Z and C to the octet string T:
283 * T = T || Hash (Z || C)
285 gcry_md_reset( md_handle );
286 gcry_md_write( md_handle, Z, zLen );
287 gcry_md_write( md_handle, C, 4 );
288 ps_md = gcry_md_read( md_handle, Hash );
290 /* 4. Output the leading l octets of T as the octet string mask. */
291 i_copylen = __MIN( l, hLen );
292 memcpy( mask, ps_md, i_copylen );
298 gcry_md_close( md_handle );
303 /* EME-OAEP-ENCODE is specified in RFC2437, section 9.1.1.1. Variables are
304 * named after the specification.
306 static int AddOaepPadding( vlc_object_t *p_this,
307 unsigned char *EM, const size_t emLenWithPrefix,
308 const unsigned char *M, const size_t mLen,
309 const unsigned char *P, const size_t pLen )
311 const int Hash = GCRY_MD_SHA1;
312 const unsigned int hLen = gcry_md_get_algo_dlen( Hash );
313 unsigned char *seed = NULL;
314 unsigned char *DB = NULL;
315 unsigned char *dbMask = NULL;
316 unsigned char *seedMask = NULL;
320 int i_err = VLC_SUCCESS;
322 /* Space for 0x00 prefix in EM. */
323 emLen = emLenWithPrefix - 1;
326 * If ||M|| > emLen-2hLen-1 then output "message too long" and stop.
328 if ( mLen > (emLen - (2 * hLen) - 1) )
330 msg_Err( p_this , "Message too long" );
335 * Generate an octet string PS consisting of emLen-||M||-2hLen-1 zero
336 * octets. The length of PS may be 0.
338 psLen = emLen - mLen - (2 * hLen) - 1;
342 * Concatenate pHash, PS, the message M, and other padding to form a data
343 * block DB as: DB = pHash || PS || 01 || M
345 DB = calloc( 1, hLen + psLen + 1 + mLen );
346 dbMask = calloc( 1, emLen - hLen );
347 seedMask = calloc( 1, hLen );
349 if ( DB == NULL || dbMask == NULL || seedMask == NULL )
356 * Let pHash = Hash(P), an octet string of length hLen.
358 gcry_md_hash_buffer( Hash, DB, P, pLen );
361 * Generate an octet string PS consisting of emLen-||M||-2hLen-1 zero
362 * octets. The length of PS may be 0.
364 memset( DB + hLen, 0, psLen );
367 * Concatenate pHash, PS, the message M, and other padding to form a data
368 * block DB as: DB = pHash || PS || 01 || M
370 DB[hLen + psLen] = 0x01;
371 memcpy( DB + hLen + psLen + 1, M, mLen );
374 * Generate a random octet string seed of length hLen
376 seed = gcry_random_bytes( hLen, GCRY_STRONG_RANDOM );
384 * Let dbMask = MGF(seed, emLen-hLen).
386 i_err = MGF1( p_this, dbMask, emLen - hLen, seed, hLen, Hash );
387 if ( i_err != VLC_SUCCESS )
391 * Let maskedDB = DB \xor dbMask.
393 for ( i = 0; i < (emLen - hLen); ++i )
397 * Let seedMask = MGF(maskedDB, hLen).
399 i_err = MGF1( p_this, seedMask, hLen, DB, emLen - hLen, Hash );
400 if ( i_err != VLC_SUCCESS )
404 * Let maskedSeed = seed \xor seedMask.
406 for ( i = 0; i < hLen; ++i )
407 seed[i] ^= seedMask[i];
410 * Let EM = maskedSeed || maskedDB.
412 assert( (1 + hLen + (hLen + psLen + 1 + mLen)) == emLenWithPrefix );
414 memcpy( EM + 1, seed, hLen );
415 memcpy( EM + 1 + hLen, DB, hLen + psLen + 1 + mLen );
430 static int EncryptAesKeyBase64( vlc_object_t *p_this, char **result )
432 sout_stream_t *p_stream = (sout_stream_t*)p_this;
433 sout_stream_sys_t *p_sys = p_stream->p_sys;
434 gcry_error_t i_gcrypt_err;
435 gcry_sexp_t sexp_rsa_params = NULL;
436 gcry_sexp_t sexp_input = NULL;
437 gcry_sexp_t sexp_encrypted = NULL;
438 gcry_sexp_t sexp_token_a = NULL;
439 gcry_mpi_t mpi_pubkey = NULL;
440 gcry_mpi_t mpi_exp = NULL;
441 gcry_mpi_t mpi_input = NULL;
442 gcry_mpi_t mpi_output = NULL;
443 unsigned char ps_padded_key[256];
444 unsigned char *ps_value;
446 int i_err = VLC_SUCCESS;
448 /* Add RSA-OAES-SHA1 padding */
449 i_err = AddOaepPadding( p_this,
450 ps_padded_key, sizeof( ps_padded_key ),
451 p_sys->ps_aes_key, sizeof( p_sys->ps_aes_key ),
453 if ( i_err != VLC_SUCCESS )
456 /* Read public key */
457 i_gcrypt_err = gcry_mpi_scan( &mpi_pubkey, GCRYMPI_FMT_USG,
459 sizeof( ps_raop_rsa_pubkey ) - 1, NULL );
460 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
462 i_err = VLC_EGENERIC;
467 i_gcrypt_err = gcry_mpi_scan( &mpi_exp, GCRYMPI_FMT_USG, ps_raop_rsa_exp,
468 sizeof( ps_raop_rsa_exp ) - 1, NULL );
469 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
471 i_err = VLC_EGENERIC;
475 /* If the input data starts with a set bit (0x80), gcrypt thinks it's a
476 * signed integer and complains. Prefixing it with a zero byte (\0)
477 * works, but involves more work. Converting it to an MPI in our code is
480 i_gcrypt_err = gcry_mpi_scan( &mpi_input, GCRYMPI_FMT_USG,
481 ps_padded_key, sizeof( ps_padded_key ),
483 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
485 i_err = VLC_EGENERIC;
489 /* Build S-expression with RSA parameters */
490 i_gcrypt_err = gcry_sexp_build( &sexp_rsa_params, NULL,
491 "(public-key(rsa(n %m)(e %m)))",
492 mpi_pubkey, mpi_exp );
493 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
495 i_err = VLC_EGENERIC;
499 /* Build S-expression for data */
500 i_gcrypt_err = gcry_sexp_build( &sexp_input, NULL, "(data(value %m))",
502 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
504 i_err = VLC_EGENERIC;
509 i_gcrypt_err = gcry_pk_encrypt( &sexp_encrypted, sexp_input,
511 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
513 i_err = VLC_EGENERIC;
517 /* Extract encrypted data */
518 sexp_token_a = gcry_sexp_find_token( sexp_encrypted, "a", 0 );
521 msg_Err( p_this , "Token 'a' not found in result S-expression" );
522 i_err = VLC_EGENERIC;
526 mpi_output = gcry_sexp_nth_mpi( sexp_token_a, 1, GCRYMPI_FMT_USG );
529 msg_Err( p_this, "Unable to extract MPI from result" );
530 i_err = VLC_EGENERIC;
534 /* Copy encrypted data into char array */
535 i_gcrypt_err = gcry_mpi_aprint( GCRYMPI_FMT_USG, &ps_value, &i_value_size,
537 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
539 i_err = VLC_EGENERIC;
543 /* Encode in Base64 */
544 *result = vlc_b64_encode_binary( ps_value, i_value_size );
547 gcry_sexp_release( sexp_rsa_params );
548 gcry_sexp_release( sexp_input );
549 gcry_sexp_release( sexp_encrypted );
550 gcry_sexp_release( sexp_token_a );
551 gcry_mpi_release( mpi_pubkey );
552 gcry_mpi_release( mpi_exp );
553 gcry_mpi_release( mpi_input );
554 gcry_mpi_release( mpi_output );
559 static char *ReadPasswordFile( vlc_object_t *p_this, const char *psz_path )
562 char *psz_password = NULL;
566 p_file = utf8_fopen( psz_path, "rt" );
567 if ( p_file == NULL )
569 msg_Err( p_this, "Unable to open password file '%s': %m", psz_path );
573 /* Read one line only */
574 if ( fgets( ps_buffer, sizeof( ps_buffer ), p_file ) == NULL )
576 if ( ferror( p_file ) )
578 msg_Err( p_this, "Error reading '%s': %m", psz_path );
582 /* Nothing was read, but there was no error either. Maybe the file is
583 * empty. Not all implementations of fgets(3) write \0 to the output
584 * buffer in this case.
589 /* Replace first newline with '\0' */
590 psz_newline = index( ps_buffer, '\n' );
591 if ( psz_newline != NULL )
595 if ( strlen( ps_buffer ) == 0 ) {
596 msg_Err( p_this, "No password could be read from '%s'", psz_path );
600 psz_password = strdup( ps_buffer );
603 if ( p_file != NULL )
609 /* Splits the value of a received header.
611 * Example: "Transport: RTP/AVP/TCP;unicast;mode=record;server_port=6000"
613 static int SplitHeader( char **ppsz_next, char **ppsz_name,
616 /* Find semicolon (separator between assignments) */
617 *ppsz_name = strsep( ppsz_next, psz_delim_semicolon );
621 *ppsz_name += strspn( *ppsz_name, psz_delim_space );
624 *ppsz_value = *ppsz_name;
625 strsep( ppsz_value, psz_delim_equal );
633 static void FreeHeader( void *p_value, void *p_data )
635 VLC_UNUSED( p_data );
639 static int ReadStatusLine( vlc_object_t *p_this )
641 sout_stream_t *p_stream = (sout_stream_t*)p_this;
642 sout_stream_sys_t *p_sys = p_stream->p_sys;
643 char *psz_line = NULL;
648 p_sys->psz_last_status_line = net_Gets( p_this, p_sys->i_control_fd,
650 if ( !p_sys->psz_last_status_line )
652 i_result = VLC_EGENERIC;
656 /* Create working copy */
657 psz_line = strdup( p_sys->psz_last_status_line );
661 psz_token = strsep( &psz_next, psz_delim_space );
662 if ( !psz_token || strncmp( psz_token, "RTSP/1.", 7 ) != 0 )
664 msg_Err( p_this, "Unknown protocol (%s)",
665 p_sys->psz_last_status_line );
666 i_result = VLC_EGENERIC;
671 psz_token = strsep( &psz_next, psz_delim_space );
674 msg_Err( p_this, "Request failed (%s)",
675 p_sys->psz_last_status_line );
676 i_result = VLC_EGENERIC;
680 i_result = atoi( psz_token );
688 static int ReadHeader( vlc_object_t *p_this,
689 vlc_dictionary_t *p_resp_headers,
692 sout_stream_t *p_stream = (sout_stream_t*)p_this;
693 sout_stream_sys_t *p_sys = p_stream->p_sys;
694 char *psz_original = NULL;
695 char *psz_line = NULL;
700 int i_err = VLC_SUCCESS;
702 psz_line = net_Gets( p_this, p_sys->i_control_fd, NULL );
705 i_err = VLC_EGENERIC;
709 /* Empty line for response end */
710 if ( psz_line[0] == '\0' )
714 psz_original = strdup( psz_line );
717 psz_token = strsep( &psz_next, psz_delim_colon );
718 if ( !psz_token || psz_next[0] != ' ' )
720 msg_Err( p_this, "Invalid header format (%s)", psz_original );
721 i_err = VLC_EGENERIC;
725 psz_name = psz_token;
726 psz_value = psz_next + 1;
728 vlc_dictionary_insert( p_resp_headers, psz_name, strdup( psz_value ) );
732 free( psz_original );
738 static int WriteAuxHeaders( vlc_object_t *p_this,
739 vlc_dictionary_t *p_req_headers )
741 sout_stream_t *p_stream = (sout_stream_t*)p_this;
742 sout_stream_sys_t *p_sys = p_stream->p_sys;
743 char **ppsz_keys = NULL;
746 int i_err = VLC_SUCCESS;
750 ppsz_keys = vlc_dictionary_all_keys( p_req_headers );
751 for ( i = 0; ppsz_keys[i]; ++i )
753 psz_key = ppsz_keys[i];
754 psz_value = vlc_dictionary_value_for_key( p_req_headers, psz_key );
756 i_rc = net_Printf( p_this, p_sys->i_control_fd, NULL,
757 "%s: %s\r\n", psz_key, psz_value );
760 i_err = VLC_EGENERIC;
766 for ( i = 0; ppsz_keys[i]; ++i )
767 free( ppsz_keys[i] );
773 static int SendRequest( vlc_object_t *p_this, const char *psz_method,
774 const char *psz_content_type, const char *psz_body,
775 vlc_dictionary_t *p_req_headers )
777 sout_stream_t *p_stream = (sout_stream_t*)p_this;
778 sout_stream_sys_t *p_sys = p_stream->p_sys;
779 const unsigned char psz_headers_end[] = "\r\n";
780 size_t i_body_length = 0;
781 int i_err = VLC_SUCCESS;
784 i_rc = net_Printf( p_this, p_sys->i_control_fd, NULL,
786 "User-Agent: " RAOP_USER_AGENT "\r\n"
787 "Client-Instance: %s\r\n"
789 psz_method, p_sys->psz_url,
790 p_sys->psz_client_instance,
794 i_err = VLC_EGENERIC;
798 if ( psz_content_type )
800 i_rc = net_Printf( p_this, p_sys->i_control_fd, NULL,
801 "Content-Type: %s\r\n", psz_content_type );
811 i_body_length = strlen( psz_body );
813 i_rc = net_Printf( p_this, p_sys->i_control_fd, NULL,
814 "Content-Length: %u\r\n",
815 (unsigned int)i_body_length );
823 i_err = WriteAuxHeaders( p_this, p_req_headers );
824 if ( i_err != VLC_SUCCESS )
827 i_rc = net_Write( p_this, p_sys->i_control_fd, NULL,
828 psz_headers_end, sizeof( psz_headers_end ) - 1 );
836 net_Write( p_this, p_sys->i_control_fd, NULL,
837 psz_body, i_body_length );
843 static int ExecRequest( vlc_object_t *p_this, const char *psz_method,
844 const char *psz_content_type, const char *psz_body,
845 vlc_dictionary_t *p_req_headers,
846 vlc_dictionary_t *p_resp_headers )
848 sout_stream_t *p_stream = (sout_stream_t*)p_this;
849 sout_stream_sys_t *p_sys = p_stream->p_sys;
851 int i_err = VLC_SUCCESS;
854 if ( p_sys->i_control_fd < 0 )
856 msg_Err( p_this, "Control connection not open" );
857 i_err = VLC_EGENERIC;
864 i_err = SendRequest( p_this, psz_method, psz_content_type, psz_body,
866 if ( i_err != VLC_SUCCESS )
869 /* Read status line */
870 i_status = ReadStatusLine( p_this );
877 vlc_dictionary_clear( p_resp_headers, FreeHeader, NULL );
881 while ( !headers_done )
883 i_err = ReadHeader( p_this, p_resp_headers, &headers_done );
884 if ( i_err != VLC_SUCCESS )
888 if ( i_status == 200 )
889 /* Request successful */
893 msg_Err( p_this, "Request failed (%s), status is %d",
894 p_sys->psz_last_status_line, i_status );
895 i_err = VLC_EGENERIC;
901 FREENULL( p_sys->psz_last_status_line );
906 static int AnnounceSDP( vlc_object_t *p_this, char *psz_local,
907 uint32_t i_session_id )
909 sout_stream_t *p_stream = (sout_stream_t*)p_this;
910 sout_stream_sys_t *p_sys = p_stream->p_sys;
911 vlc_dictionary_t req_headers;
912 vlc_dictionary_t resp_headers;
913 unsigned char ps_sac[16];
914 char *psz_sdp = NULL;
915 char *psz_sac_base64 = NULL;
916 char *psz_aes_key_base64 = NULL;
917 char *psz_aes_iv_base64 = NULL;
918 int i_err = VLC_SUCCESS;
921 vlc_dictionary_init( &req_headers, 0 );
922 vlc_dictionary_init( &resp_headers, 0 );
924 /* Encrypt AES key and encode it in Base64 */
925 i_rc = EncryptAesKeyBase64( p_this, &psz_aes_key_base64 );
926 if ( i_rc != VLC_SUCCESS || psz_aes_key_base64 == NULL )
928 i_err = VLC_EGENERIC;
931 RemoveBase64Padding( psz_aes_key_base64 );
933 /* Encode AES IV in Base64 */
934 psz_aes_iv_base64 = vlc_b64_encode_binary( p_sys->ps_aes_iv,
935 sizeof( p_sys->ps_aes_iv ) );
936 if ( psz_aes_iv_base64 == NULL )
938 i_err = VLC_EGENERIC;
941 RemoveBase64Padding( psz_aes_iv_base64 );
943 /* Random bytes for Apple-Challenge header */
944 gcry_randomize( ps_sac, sizeof( ps_sac ), GCRY_STRONG_RANDOM );
946 psz_sac_base64 = vlc_b64_encode_binary( ps_sac, sizeof( ps_sac ) );
947 if ( psz_sac_base64 == NULL )
949 i_err = VLC_EGENERIC;
952 RemoveBase64Padding( psz_sac_base64 );
955 * Note: IPv6 addresses also use "IP4". Make sure not to include the
958 i_rc = asprintf( &psz_sdp,
960 "o=iTunes %u 0 IN IP4 %s\r\n"
964 "m=audio 0 RTP/AVP 96\r\n"
965 "a=rtpmap:96 AppleLossless\r\n"
966 "a=fmtp:96 4096 0 16 40 10 14 2 255 0 0 44100\r\n"
969 i_session_id, psz_local, p_sys->psz_host,
970 psz_aes_key_base64, psz_aes_iv_base64 );
978 /* Build and send request */
979 vlc_dictionary_insert( &req_headers, "Apple-Challenge", psz_sac_base64 );
981 i_err = ExecRequest( p_this, "ANNOUNCE", "application/sdp", psz_sdp,
982 &req_headers, &resp_headers);
983 if ( i_err != VLC_SUCCESS )
987 vlc_dictionary_clear( &req_headers, NULL, NULL );
988 vlc_dictionary_clear( &resp_headers, FreeHeader, NULL );
991 free( psz_sac_base64 );
992 free( psz_aes_key_base64 );
993 free( psz_aes_iv_base64 );
998 static int SendSetup( vlc_object_t *p_this )
1000 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1001 sout_stream_sys_t *p_sys = p_stream->p_sys;
1002 vlc_dictionary_t req_headers;
1003 vlc_dictionary_t resp_headers;
1004 int i_err = VLC_SUCCESS;
1010 vlc_dictionary_init( &req_headers, 0 );
1011 vlc_dictionary_init( &resp_headers, 0 );
1013 vlc_dictionary_insert( &req_headers, "Transport",
1014 ((void*)"RTP/AVP/TCP;unicast;interleaved=0-1;"
1017 i_err = ExecRequest( p_this, "SETUP", NULL, NULL,
1018 &req_headers, &resp_headers );
1019 if ( i_err != VLC_SUCCESS )
1022 psz_tmp = vlc_dictionary_value_for_key( &resp_headers, "Session" );
1025 msg_Err( p_this, "Missing 'Session' header during setup" );
1026 i_err = VLC_EGENERIC;
1030 free( p_sys->psz_session );
1031 p_sys->psz_session = strdup( psz_tmp );
1033 /* Get server_port */
1034 psz_next = vlc_dictionary_value_for_key( &resp_headers, "Transport" );
1035 while ( SplitHeader( &psz_next, &psz_name, &psz_value ) )
1037 if ( psz_value && strcmp( psz_name, "server_port" ) == 0 )
1039 p_sys->i_server_port = atoi( psz_value );
1044 if ( !p_sys->i_server_port )
1046 msg_Err( p_this, "Missing 'server_port' during setup" );
1047 i_err = VLC_EGENERIC;
1052 psz_next = vlc_dictionary_value_for_key( &resp_headers,
1053 "Audio-Jack-Status" );
1054 while ( SplitHeader( &psz_next, &psz_name, &psz_value ) )
1056 if ( strcmp( psz_name, "type" ) != 0 )
1059 if ( strcmp( psz_value, "analog" ) == 0 )
1060 p_sys->i_jack_type = JACK_TYPE_ANALOG;
1062 else if ( strcmp( psz_value, "digital" ) == 0 )
1063 p_sys->i_jack_type = JACK_TYPE_DIGITAL;
1069 vlc_dictionary_clear( &req_headers, NULL, NULL );
1070 vlc_dictionary_clear( &resp_headers, FreeHeader, NULL );
1075 static int SendRecord( vlc_object_t *p_this )
1077 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1078 sout_stream_sys_t *p_sys = p_stream->p_sys;
1079 vlc_dictionary_t req_headers;
1080 vlc_dictionary_t resp_headers;
1081 int i_err = VLC_SUCCESS;
1084 vlc_dictionary_init( &req_headers, 0 );
1085 vlc_dictionary_init( &resp_headers, 0 );
1087 vlc_dictionary_insert( &req_headers, "Range", (void *)"npt=0-" );
1088 vlc_dictionary_insert( &req_headers, "RTP-Info",
1089 (void *)"seq=0;rtptime=0" );
1090 vlc_dictionary_insert( &req_headers, "Session",
1091 (void *)p_sys->psz_session );
1093 i_err = ExecRequest( p_this, "RECORD", NULL, NULL,
1094 &req_headers, &resp_headers );
1095 if ( i_err != VLC_SUCCESS )
1098 psz_value = vlc_dictionary_value_for_key( &resp_headers, "Audio-Latency" );
1100 p_sys->i_audio_latency = atoi( psz_value );
1102 p_sys->i_audio_latency = 0;
1105 vlc_dictionary_clear( &req_headers, NULL, NULL );
1106 vlc_dictionary_clear( &resp_headers, FreeHeader, NULL );
1111 static int SendFlush( vlc_object_t *p_this )
1113 VLC_UNUSED( p_this );
1114 vlc_dictionary_t resp_headers;
1115 vlc_dictionary_t req_headers;
1116 int i_err = VLC_SUCCESS;
1118 vlc_dictionary_init( &req_headers, 0 );
1119 vlc_dictionary_init( &resp_headers, 0 );
1121 vlc_dictionary_insert( &req_headers, "RTP-Info",
1122 (void *)"seq=0;rtptime=0" );
1124 i_err = ExecRequest( p_this, "FLUSH", NULL, NULL,
1125 &req_headers, &resp_headers );
1126 if ( i_err != VLC_SUCCESS )
1130 vlc_dictionary_clear( &req_headers, NULL, NULL );
1131 vlc_dictionary_clear( &resp_headers, FreeHeader, NULL );
1136 static int SendTeardown( vlc_object_t *p_this )
1138 vlc_dictionary_t resp_headers;
1139 vlc_dictionary_t req_headers;
1140 int i_err = VLC_SUCCESS;
1142 vlc_dictionary_init( &req_headers, 0 );
1143 vlc_dictionary_init( &resp_headers, 0 );
1145 i_err = ExecRequest( p_this, "TEARDOWN", NULL, NULL,
1146 &req_headers, &resp_headers );
1147 if ( i_err != VLC_SUCCESS )
1151 vlc_dictionary_clear( &req_headers, NULL, NULL );
1152 vlc_dictionary_clear( &resp_headers, FreeHeader, NULL );
1157 static int UpdateVolume( vlc_object_t *p_this )
1159 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1160 sout_stream_sys_t *p_sys = p_stream->p_sys;
1161 vlc_dictionary_t req_headers;
1162 vlc_dictionary_t resp_headers;
1163 char *psz_parameters = NULL;
1165 int i_err = VLC_SUCCESS;
1168 vlc_dictionary_init( &req_headers, 0 );
1169 vlc_dictionary_init( &resp_headers, 0 );
1171 /* Our volume is 0..255, RAOP is -144..0 (-144 off, -30..0 on) */
1174 p_sys->i_volume = __MAX( 0, __MIN( p_sys->i_volume, 255 ) );
1176 if ( p_sys->i_volume == 0 )
1179 d_volume = -30 + ( ( (double)p_sys->i_volume ) * 30.0 / 255.0 );
1181 /* Format without using locales */
1182 i_rc = us_asprintf( &psz_parameters, "volume: %0.6f\r\n", d_volume );
1189 vlc_dictionary_insert( &req_headers, "Session",
1190 (void *)p_sys->psz_session );
1192 i_err = ExecRequest( p_this, "SET_PARAMETER",
1193 "text/parameters", psz_parameters,
1194 &req_headers, &resp_headers );
1195 if ( i_err != VLC_SUCCESS )
1199 vlc_dictionary_clear( &req_headers, NULL, NULL );
1200 vlc_dictionary_clear( &resp_headers, FreeHeader, NULL );
1201 free( psz_parameters );
1206 static void LogInfo( vlc_object_t *p_this )
1208 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1209 sout_stream_sys_t *p_sys = p_stream->p_sys;
1210 const char *psz_jack_name;
1212 msg_Info( p_this, "Audio latency: %d", p_sys->i_audio_latency );
1214 switch ( p_sys->i_jack_type )
1216 case JACK_TYPE_ANALOG:
1217 psz_jack_name = "analog";
1220 case JACK_TYPE_DIGITAL:
1221 psz_jack_name = "digital";
1224 case JACK_TYPE_NONE:
1226 psz_jack_name = "none";
1230 msg_Info( p_this, "Jack type: %s", psz_jack_name );
1233 static void SendAudio( sout_stream_t *p_stream, block_t *p_buffer )
1235 sout_stream_sys_t *p_sys = p_stream->p_sys;
1236 gcry_error_t i_gcrypt_err;
1239 size_t i_payload_len;
1240 size_t i_realloc_len;
1243 const uint8_t header[16] = {
1244 0x24, 0x00, 0x00, 0x00,
1245 0xf0, 0xff, 0x00, 0x00,
1246 0x00, 0x00, 0x00, 0x00,
1247 0x00, 0x00, 0x00, 0x00,
1252 i_len = sizeof( header ) + p_buffer->i_buffer;
1254 /* Buffer resize needed? */
1255 if ( i_len > p_sys->i_sendbuf_len || p_sys->p_sendbuf == NULL )
1257 /* Grow in blocks of 4K */
1258 i_realloc_len = (1 + (i_len / 4096)) * 4096;
1260 p_sys->p_sendbuf = realloc( p_sys->p_sendbuf, i_realloc_len );
1261 if ( p_sys->p_sendbuf == NULL )
1264 p_sys->i_sendbuf_len = i_realloc_len;
1268 memcpy( p_sys->p_sendbuf, header, sizeof( header ) );
1269 memcpy( p_sys->p_sendbuf + sizeof( header ),
1270 p_buffer->p_buffer, p_buffer->i_buffer );
1272 /* Calculate payload length and update header */
1273 i_payload_len = i_len - 4;
1274 if ( i_payload_len > 0xffff )
1276 msg_Err( p_stream, "Buffer is too long (%u bytes)",
1277 (unsigned int)i_payload_len );
1281 p_sys->p_sendbuf[2] = ( i_payload_len >> 8 ) & 0xff;
1282 p_sys->p_sendbuf[3] = i_payload_len & 0xff;
1285 i_gcrypt_err = gcry_cipher_reset( p_sys->aes_ctx );
1286 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
1290 i_gcrypt_err = gcry_cipher_setiv( p_sys->aes_ctx, p_sys->ps_aes_iv,
1291 sizeof( p_sys->ps_aes_iv ) );
1292 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
1295 /* Encrypt in place. Only full blocks of 16 bytes are encrypted,
1296 * the rest (0-15 bytes) is left unencrypted.
1299 gcry_cipher_encrypt( p_sys->aes_ctx,
1300 p_sys->p_sendbuf + sizeof( header ),
1301 ( p_buffer->i_buffer / 16 ) * 16,
1303 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
1307 rc = net_Write( p_stream, p_sys->i_stream_fd, NULL,
1308 p_sys->p_sendbuf, i_len );
1312 p_next = p_buffer->p_next;
1313 block_Release( p_buffer );
1318 block_ChainRelease( p_buffer );
1323 /*****************************************************************************
1325 *****************************************************************************/
1326 static int Open( vlc_object_t *p_this )
1328 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1329 sout_stream_sys_t *p_sys;
1330 char psz_local[NI_MAXNUMERICHOST];
1331 char *psz_pwfile = NULL;
1332 gcry_error_t i_gcrypt_err;
1333 int i_err = VLC_SUCCESS;
1334 uint32_t i_session_id;
1335 uint64_t i_client_instance;
1339 config_ChainParse( p_stream, SOUT_CFG_PREFIX, ppsz_sout_options,
1342 p_sys = calloc( 1, sizeof( *p_sys ) );
1343 if ( p_sys == NULL )
1349 p_stream->p_sys = p_sys;
1350 p_stream->pf_add = Add;
1351 p_stream->pf_del = Del;
1352 p_stream->pf_send = Send;
1353 p_stream->p_sout->i_out_pace_nocontrol++;
1355 p_sys->i_control_fd = -1;
1356 p_sys->i_stream_fd = -1;
1357 p_sys->i_volume = var_GetInteger( p_stream, SOUT_CFG_PREFIX "volume");
1358 p_sys->i_jack_type = JACK_TYPE_NONE;
1360 p_sys->psz_host = var_GetNonEmptyString( p_stream,
1361 SOUT_CFG_PREFIX "host" );
1362 if ( p_sys->psz_host == NULL )
1364 msg_Err( p_this, "Missing host" );
1365 i_err = VLC_EGENERIC;
1369 p_sys->psz_password = var_GetNonEmptyString( p_stream,
1370 SOUT_CFG_PREFIX "password" );
1371 if ( p_sys->psz_password == NULL )
1373 /* Try password file instead */
1374 psz_pwfile = var_GetNonEmptyString( p_stream,
1375 SOUT_CFG_PREFIX "password-file" );
1376 if ( psz_pwfile != NULL )
1378 p_sys->psz_password = ReadPasswordFile( p_this, psz_pwfile );
1379 if ( p_sys->psz_password == NULL )
1381 i_err = VLC_EGENERIC;
1387 if ( p_sys->psz_password != NULL )
1388 msg_Info( p_this, "Using password authentication" );
1390 var_AddCallback( p_stream, SOUT_CFG_PREFIX "volume",
1391 VolumeCallback, NULL );
1392 p_sys->b_volume_callback = true;
1394 /* Open control connection */
1395 p_sys->i_control_fd = net_ConnectTCP( p_stream, p_sys->psz_host,
1397 if ( p_sys->i_control_fd < 0 )
1399 msg_Err( p_this, "Cannot establish control connection to %s:%d (%m)",
1400 p_sys->psz_host, RAOP_PORT );
1401 i_err = VLC_EGENERIC;
1405 /* Get local IP address */
1406 if ( net_GetSockAddress( p_sys->i_control_fd, psz_local, NULL ) )
1408 msg_Err( p_this, "cannot get local IP address" );
1409 i_err = VLC_EGENERIC;
1413 /* Random session ID */
1414 gcry_randomize( &i_session_id, sizeof( i_session_id ),
1415 GCRY_STRONG_RANDOM );
1417 /* Random client instance */
1418 gcry_randomize( &i_client_instance, sizeof( i_client_instance ),
1419 GCRY_STRONG_RANDOM );
1420 if ( asprintf( &p_sys->psz_client_instance, "%016"PRIX64,
1421 i_client_instance ) < 0 )
1427 /* Build session URL */
1428 if ( asprintf( &p_sys->psz_url, "rtsp://%s/%u",
1429 psz_local, i_session_id ) < 0 )
1435 /* Generate AES key and IV */
1436 gcry_randomize( p_sys->ps_aes_key, sizeof( p_sys->ps_aes_key ),
1437 GCRY_STRONG_RANDOM );
1438 gcry_randomize( p_sys->ps_aes_iv, sizeof( p_sys->ps_aes_iv ),
1439 GCRY_STRONG_RANDOM );
1442 i_gcrypt_err = gcry_cipher_open( &p_sys->aes_ctx, GCRY_CIPHER_AES,
1443 GCRY_CIPHER_MODE_CBC, 0 );
1444 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
1446 i_err = VLC_EGENERIC;
1451 i_gcrypt_err = gcry_cipher_setkey( p_sys->aes_ctx, p_sys->ps_aes_key,
1452 sizeof( p_sys->ps_aes_key ) );
1453 if ( CheckForGcryptError( p_stream, i_gcrypt_err ) )
1455 i_err = VLC_EGENERIC;
1459 /* Protocol handshake */
1460 i_err = AnnounceSDP( p_this, psz_local, i_session_id );
1461 if ( i_err != VLC_SUCCESS )
1464 i_err = SendSetup( p_this );
1465 if ( i_err != VLC_SUCCESS )
1468 i_err = SendRecord( p_this );
1469 if ( i_err != VLC_SUCCESS )
1472 i_err = UpdateVolume( p_this );
1473 if ( i_err != VLC_SUCCESS )
1478 /* Open stream connection */
1479 p_sys->i_stream_fd = net_ConnectTCP( p_stream, p_sys->psz_host,
1480 p_sys->i_server_port );
1481 if ( p_sys->i_stream_fd < 0 )
1483 msg_Err( p_this, "Cannot establish stream connection to %s:%d (%m)",
1484 p_sys->psz_host, p_sys->i_server_port );
1485 i_err = VLC_EGENERIC;
1492 if ( i_err != VLC_SUCCESS )
1493 FreeSys( p_this, p_sys );
1499 /*****************************************************************************
1501 *****************************************************************************/
1502 static void Close( vlc_object_t *p_this )
1504 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1505 sout_stream_sys_t *p_sys = p_stream->p_sys;
1507 SendFlush( p_this );
1508 SendTeardown( p_this );
1510 FreeSys( p_this, p_sys );
1512 p_stream->p_sout->i_out_pace_nocontrol--;
1516 /*****************************************************************************
1518 *****************************************************************************/
1519 static sout_stream_id_t *Add( sout_stream_t *p_stream, es_format_t *p_fmt )
1521 sout_stream_sys_t *p_sys = p_stream->p_sys;
1522 sout_stream_id_t *id = NULL;
1524 id = calloc( 1, sizeof( *id ) );
1528 es_format_Copy( &id->fmt, p_fmt );
1530 switch ( id->fmt.i_cat )
1533 if ( id->fmt.i_codec == VLC_CODEC_ALAC )
1535 if ( p_sys->p_audio_stream )
1537 msg_Warn( p_stream, "Only the first Apple Lossless audio "
1540 else if ( id->fmt.audio.i_rate != 44100 ||
1541 id->fmt.audio.i_channels != 2 )
1543 msg_Err( p_stream, "The Apple Lossless audio stream must be "
1544 "encoded with 44100 Hz and 2 channels" );
1548 /* Use this stream */
1549 p_sys->p_audio_stream = id;
1552 else if ( !p_sys->b_alac_warning )
1554 msg_Err( p_stream, "Apple Lossless is the only codec supported. "
1555 "Use the \"transcode\" module for conversion "
1556 "(e.g. \"transcode{acodec=alac,"
1557 "channels=2}\")." );
1558 p_sys->b_alac_warning = true;
1564 /* Leave other stream types alone */
1577 /*****************************************************************************
1579 *****************************************************************************/
1580 static int Del( sout_stream_t *p_stream, sout_stream_id_t *id )
1582 sout_stream_sys_t *p_sys = p_stream->p_sys;
1583 int i_err = VLC_SUCCESS;
1585 if ( p_sys->p_audio_stream == id )
1586 p_sys->p_audio_stream = NULL;
1594 /*****************************************************************************
1596 *****************************************************************************/
1597 static int Send( sout_stream_t *p_stream, sout_stream_id_t *id,
1600 sout_stream_sys_t *p_sys = p_stream->p_sys;
1602 if ( id->fmt.i_cat == AUDIO_ES && id == p_sys->p_audio_stream )
1604 /* SendAudio takes care of releasing the buffers */
1605 SendAudio( p_stream, p_buffer );
1609 block_ChainRelease( p_buffer );
1616 /*****************************************************************************
1617 * VolumeCallback: called when the volume is changed on the fly.
1618 *****************************************************************************/
1619 static int VolumeCallback( vlc_object_t *p_this, char const *psz_cmd,
1620 vlc_value_t oldval, vlc_value_t newval,
1623 VLC_UNUSED(psz_cmd);
1627 sout_stream_t *p_stream = (sout_stream_t*)p_this;
1628 sout_stream_sys_t *p_sys = p_stream->p_sys;
1630 /* TODO: Implement volume change */