1 /*****************************************************************************
2 * real.c: real rtsp input
3 *****************************************************************************
4 * Copyright (C) 2002-2004 the xine project
5 * Copyright (C) 2005 VideoLAN
8 * Authors: Gildas Bazin <gbazin@videolan.org>
9 * Adapted from xine which itself adapted it from joschkas real tools.
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
34 #include "real_sdpplin.h"
36 const unsigned char xor_table[] = {
37 0x05, 0x18, 0x74, 0xd0, 0x0d, 0x09, 0x02, 0x53,
38 0xc0, 0x01, 0x05, 0x05, 0x67, 0x03, 0x19, 0x70,
39 0x08, 0x27, 0x66, 0x10, 0x10, 0x72, 0x08, 0x09,
40 0x63, 0x11, 0x03, 0x71, 0x08, 0x08, 0x70, 0x02,
41 0x10, 0x57, 0x05, 0x18, 0x54, 0x00, 0x00, 0x00 };
43 #define BE_32(x) GetDWBE(x)
44 #define LE_32(x) GetDWLE(x)
45 #define BE_16(x) GetWBE(x)
46 #define LE_16(x) GetWLE(x)
47 #define BE_32C(x,y) do {uint32_t in=y; *(uint32_t *)(x)=GetDWBE(&in);} while(0)
48 #define LE_32C(x,y) do {uint32_t in=y; *(uint32_t *)(x)=GetDWLE(&in);} while(0)
49 #define MAX(x,y) ((x>y) ? x : y)
52 static void hash(char *field, char *param)
62 lprintf("hash input: %x %x %x %x\n", a, b, c, d);
63 lprintf("hash parameter:\n");
65 a = ((b & c) | (~b & d)) + LE_32((param+0x00)) + a - 0x28955B88;
66 a = ((a << 0x07) | (a >> 0x19)) + b;
67 d = ((a & b) | (~a & c)) + LE_32((param+0x04)) + d - 0x173848AA;
68 d = ((d << 0x0c) | (d >> 0x14)) + a;
69 c = ((d & a) | (~d & b)) + LE_32((param+0x08)) + c + 0x242070DB;
70 c = ((c << 0x11) | (c >> 0x0f)) + d;
71 b = ((c & d) | (~c & a)) + LE_32((param+0x0c)) + b - 0x3E423112;
72 b = ((b << 0x16) | (b >> 0x0a)) + c;
73 a = ((b & c) | (~b & d)) + LE_32((param+0x10)) + a - 0x0A83F051;
74 a = ((a << 0x07) | (a >> 0x19)) + b;
75 d = ((a & b) | (~a & c)) + LE_32((param+0x14)) + d + 0x4787C62A;
76 d = ((d << 0x0c) | (d >> 0x14)) + a;
77 c = ((d & a) | (~d & b)) + LE_32((param+0x18)) + c - 0x57CFB9ED;
78 c = ((c << 0x11) | (c >> 0x0f)) + d;
79 b = ((c & d) | (~c & a)) + LE_32((param+0x1c)) + b - 0x02B96AFF;
80 b = ((b << 0x16) | (b >> 0x0a)) + c;
81 a = ((b & c) | (~b & d)) + LE_32((param+0x20)) + a + 0x698098D8;
82 a = ((a << 0x07) | (a >> 0x19)) + b;
83 d = ((a & b) | (~a & c)) + LE_32((param+0x24)) + d - 0x74BB0851;
84 d = ((d << 0x0c) | (d >> 0x14)) + a;
85 c = ((d & a) | (~d & b)) + LE_32((param+0x28)) + c - 0x0000A44F;
86 c = ((c << 0x11) | (c >> 0x0f)) + d;
87 b = ((c & d) | (~c & a)) + LE_32((param+0x2C)) + b - 0x76A32842;
88 b = ((b << 0x16) | (b >> 0x0a)) + c;
89 a = ((b & c) | (~b & d)) + LE_32((param+0x30)) + a + 0x6B901122;
90 a = ((a << 0x07) | (a >> 0x19)) + b;
91 d = ((a & b) | (~a & c)) + LE_32((param+0x34)) + d - 0x02678E6D;
92 d = ((d << 0x0c) | (d >> 0x14)) + a;
93 c = ((d & a) | (~d & b)) + LE_32((param+0x38)) + c - 0x5986BC72;
94 c = ((c << 0x11) | (c >> 0x0f)) + d;
95 b = ((c & d) | (~c & a)) + LE_32((param+0x3c)) + b + 0x49B40821;
96 b = ((b << 0x16) | (b >> 0x0a)) + c;
98 a = ((b & d) | (~d & c)) + LE_32((param+0x04)) + a - 0x09E1DA9E;
99 a = ((a << 0x05) | (a >> 0x1b)) + b;
100 d = ((a & c) | (~c & b)) + LE_32((param+0x18)) + d - 0x3FBF4CC0;
101 d = ((d << 0x09) | (d >> 0x17)) + a;
102 c = ((d & b) | (~b & a)) + LE_32((param+0x2c)) + c + 0x265E5A51;
103 c = ((c << 0x0e) | (c >> 0x12)) + d;
104 b = ((c & a) | (~a & d)) + LE_32((param+0x00)) + b - 0x16493856;
105 b = ((b << 0x14) | (b >> 0x0c)) + c;
106 a = ((b & d) | (~d & c)) + LE_32((param+0x14)) + a - 0x29D0EFA3;
107 a = ((a << 0x05) | (a >> 0x1b)) + b;
108 d = ((a & c) | (~c & b)) + LE_32((param+0x28)) + d + 0x02441453;
109 d = ((d << 0x09) | (d >> 0x17)) + a;
110 c = ((d & b) | (~b & a)) + LE_32((param+0x3c)) + c - 0x275E197F;
111 c = ((c << 0x0e) | (c >> 0x12)) + d;
112 b = ((c & a) | (~a & d)) + LE_32((param+0x10)) + b - 0x182C0438;
113 b = ((b << 0x14) | (b >> 0x0c)) + c;
114 a = ((b & d) | (~d & c)) + LE_32((param+0x24)) + a + 0x21E1CDE6;
115 a = ((a << 0x05) | (a >> 0x1b)) + b;
116 d = ((a & c) | (~c & b)) + LE_32((param+0x38)) + d - 0x3CC8F82A;
117 d = ((d << 0x09) | (d >> 0x17)) + a;
118 c = ((d & b) | (~b & a)) + LE_32((param+0x0c)) + c - 0x0B2AF279;
119 c = ((c << 0x0e) | (c >> 0x12)) + d;
120 b = ((c & a) | (~a & d)) + LE_32((param+0x20)) + b + 0x455A14ED;
121 b = ((b << 0x14) | (b >> 0x0c)) + c;
122 a = ((b & d) | (~d & c)) + LE_32((param+0x34)) + a - 0x561C16FB;
123 a = ((a << 0x05) | (a >> 0x1b)) + b;
124 d = ((a & c) | (~c & b)) + LE_32((param+0x08)) + d - 0x03105C08;
125 d = ((d << 0x09) | (d >> 0x17)) + a;
126 c = ((d & b) | (~b & a)) + LE_32((param+0x1c)) + c + 0x676F02D9;
127 c = ((c << 0x0e) | (c >> 0x12)) + d;
128 b = ((c & a) | (~a & d)) + LE_32((param+0x30)) + b - 0x72D5B376;
129 b = ((b << 0x14) | (b >> 0x0c)) + c;
131 a = (b ^ c ^ d) + LE_32((param+0x14)) + a - 0x0005C6BE;
132 a = ((a << 0x04) | (a >> 0x1c)) + b;
133 d = (a ^ b ^ c) + LE_32((param+0x20)) + d - 0x788E097F;
134 d = ((d << 0x0b) | (d >> 0x15)) + a;
135 c = (d ^ a ^ b) + LE_32((param+0x2c)) + c + 0x6D9D6122;
136 c = ((c << 0x10) | (c >> 0x10)) + d;
137 b = (c ^ d ^ a) + LE_32((param+0x38)) + b - 0x021AC7F4;
138 b = ((b << 0x17) | (b >> 0x09)) + c;
139 a = (b ^ c ^ d) + LE_32((param+0x04)) + a - 0x5B4115BC;
140 a = ((a << 0x04) | (a >> 0x1c)) + b;
141 d = (a ^ b ^ c) + LE_32((param+0x10)) + d + 0x4BDECFA9;
142 d = ((d << 0x0b) | (d >> 0x15)) + a;
143 c = (d ^ a ^ b) + LE_32((param+0x1c)) + c - 0x0944B4A0;
144 c = ((c << 0x10) | (c >> 0x10)) + d;
145 b = (c ^ d ^ a) + LE_32((param+0x28)) + b - 0x41404390;
146 b = ((b << 0x17) | (b >> 0x09)) + c;
147 a = (b ^ c ^ d) + LE_32((param+0x34)) + a + 0x289B7EC6;
148 a = ((a << 0x04) | (a >> 0x1c)) + b;
149 d = (a ^ b ^ c) + LE_32((param+0x00)) + d - 0x155ED806;
150 d = ((d << 0x0b) | (d >> 0x15)) + a;
151 c = (d ^ a ^ b) + LE_32((param+0x0c)) + c - 0x2B10CF7B;
152 c = ((c << 0x10) | (c >> 0x10)) + d;
153 b = (c ^ d ^ a) + LE_32((param+0x18)) + b + 0x04881D05;
154 b = ((b << 0x17) | (b >> 0x09)) + c;
155 a = (b ^ c ^ d) + LE_32((param+0x24)) + a - 0x262B2FC7;
156 a = ((a << 0x04) | (a >> 0x1c)) + b;
157 d = (a ^ b ^ c) + LE_32((param+0x30)) + d - 0x1924661B;
158 d = ((d << 0x0b) | (d >> 0x15)) + a;
159 c = (d ^ a ^ b) + LE_32((param+0x3c)) + c + 0x1fa27cf8;
160 c = ((c << 0x10) | (c >> 0x10)) + d;
161 b = (c ^ d ^ a) + LE_32((param+0x08)) + b - 0x3B53A99B;
162 b = ((b << 0x17) | (b >> 0x09)) + c;
164 a = ((~d | b) ^ c) + LE_32((param+0x00)) + a - 0x0BD6DDBC;
165 a = ((a << 0x06) | (a >> 0x1a)) + b;
166 d = ((~c | a) ^ b) + LE_32((param+0x1c)) + d + 0x432AFF97;
167 d = ((d << 0x0a) | (d >> 0x16)) + a;
168 c = ((~b | d) ^ a) + LE_32((param+0x38)) + c - 0x546BDC59;
169 c = ((c << 0x0f) | (c >> 0x11)) + d;
170 b = ((~a | c) ^ d) + LE_32((param+0x14)) + b - 0x036C5FC7;
171 b = ((b << 0x15) | (b >> 0x0b)) + c;
172 a = ((~d | b) ^ c) + LE_32((param+0x30)) + a + 0x655B59C3;
173 a = ((a << 0x06) | (a >> 0x1a)) + b;
174 d = ((~c | a) ^ b) + LE_32((param+0x0C)) + d - 0x70F3336E;
175 d = ((d << 0x0a) | (d >> 0x16)) + a;
176 c = ((~b | d) ^ a) + LE_32((param+0x28)) + c - 0x00100B83;
177 c = ((c << 0x0f) | (c >> 0x11)) + d;
178 b = ((~a | c) ^ d) + LE_32((param+0x04)) + b - 0x7A7BA22F;
179 b = ((b << 0x15) | (b >> 0x0b)) + c;
180 a = ((~d | b) ^ c) + LE_32((param+0x20)) + a + 0x6FA87E4F;
181 a = ((a << 0x06) | (a >> 0x1a)) + b;
182 d = ((~c | a) ^ b) + LE_32((param+0x3c)) + d - 0x01D31920;
183 d = ((d << 0x0a) | (d >> 0x16)) + a;
184 c = ((~b | d) ^ a) + LE_32((param+0x18)) + c - 0x5CFEBCEC;
185 c = ((c << 0x0f) | (c >> 0x11)) + d;
186 b = ((~a | c) ^ d) + LE_32((param+0x34)) + b + 0x4E0811A1;
187 b = ((b << 0x15) | (b >> 0x0b)) + c;
188 a = ((~d | b) ^ c) + LE_32((param+0x10)) + a - 0x08AC817E;
189 a = ((a << 0x06) | (a >> 0x1a)) + b;
190 d = ((~c | a) ^ b) + LE_32((param+0x2c)) + d - 0x42C50DCB;
191 d = ((d << 0x0a) | (d >> 0x16)) + a;
192 c = ((~b | d) ^ a) + LE_32((param+0x08)) + c + 0x2AD7D2BB;
193 c = ((c << 0x0f) | (c >> 0x11)) + d;
194 b = ((~a | c) ^ d) + LE_32((param+0x24)) + b - 0x14792C6F;
195 b = ((b << 0x15) | (b >> 0x0b)) + c;
197 lprintf("hash output: %x %x %x %x\n", a, b, c, d);
202 d += LE_32(field+12);
210 static void call_hash (char *key, char *challenge, int len) {
212 uint8_t *ptr1, *ptr2;
213 uint32_t a, b, c, d, tmp;
215 ptr1=(uint8_t*)(key+16);
216 ptr2=(uint8_t*)(key+20);
223 if (a < (uint32_t)(len << 3))
225 lprintf("not verified: (len << 3) > a true\n");
229 tmp = LE_32(ptr2) + (len >> 0x1d);
233 if (a <= (uint32_t)len)
235 memcpy(key+b+24, challenge, a);
240 while ( d < (uint32_t)len ) {
241 lprintf("not verified: while ( d < len )\n");
242 hash(key, challenge+d-0x3f);
249 memcpy(key+b+24, challenge+c, len-c);
252 static void calc_response (char *result, char *field) {
257 memset (buf1, 0, 64);
260 memcpy (buf2, field+16, 8);
261 i = ( LE_32((buf2)) >> 3 ) & 0x3f;
268 lprintf("not verified: ! (i < 56)\n");
272 call_hash (field, buf1, i);
273 call_hash (field, buf2, 8);
274 memcpy (result, field, 16);
277 static void calc_response_string (char *result, char *challenge) {
282 /* initialize our field */
283 BE_32C (field, 0x01234567);
284 BE_32C ((field+4), 0x89ABCDEF);
285 BE_32C ((field+8), 0xFEDCBA98);
286 BE_32C ((field+12), 0x76543210);
287 BE_32C ((field+16), 0x00000000);
288 BE_32C ((field+20), 0x00000000);
290 /* calculate response */
291 call_hash(field, challenge, 64);
292 calc_response(zres,field);
294 /* convert zres to ascii string */
295 for (i=0; i<16; i++ ) {
298 a = (zres[i] >> 4) & 15;
301 result[i*2] = ((a<10) ? (a+48) : (a+87)) & 255;
302 result[i*2+1] = ((b<10) ? (b+48) : (b+87)) & 255;
306 void real_calc_response_and_checksum (char *response, char *chksum, char *challenge) {
308 int ch_len, table_len, resp_len;
313 /* initialize return values */
314 memset(response, 0, 64);
315 memset(chksum, 0, 34);
317 /* initialize buffer */
320 BE_32C(ptr, 0xa1e9149d);
322 BE_32C(ptr, 0x0e6b3b59);
325 /* some (length) checks */
326 if (challenge != NULL)
328 ch_len = strlen (challenge);
330 if (ch_len == 40) /* what a hack... */
335 if ( ch_len > 56 ) ch_len=56;
337 /* copy challenge to buf */
338 memcpy(ptr, challenge, ch_len);
341 if (xor_table != NULL)
343 table_len = strlen((char *)xor_table);
345 if (table_len > 56) table_len=56;
347 /* xor challenge bytewise with xor_table */
348 for (i=0; i<table_len; i++)
349 ptr[i] = ptr[i] ^ xor_table[i];
352 calc_response_string (response, buf);
355 resp_len = strlen (response);
356 strcpy (&response[resp_len], "01d0a8e3");
358 /* calculate checksum */
359 for (i=0; i<resp_len/4; i++)
360 chksum[i] = response[i*4];
365 * takes a MLTI-Chunk and a rule number got from match_asm_rule,
366 * returns a pointer to selected data and number of bytes in that.
368 static int select_mlti_data(const char *mlti_chunk, int mlti_size, int selection, char **out) {
370 int numrules, codec, size;
373 /* MLTI chunk should begin with MLTI */
374 if ((mlti_chunk[0] != 'M')
375 ||(mlti_chunk[1] != 'L')
376 ||(mlti_chunk[2] != 'T')
377 ||(mlti_chunk[3] != 'I'))
379 lprintf("MLTI tag not detected, copying data\n");
380 memcpy(*out, mlti_chunk, mlti_size);
386 /* next 16 bits are the number of rules */
387 numrules=BE_16(mlti_chunk);
388 if (selection >= numrules) return 0;
390 /* now <numrules> indices of codecs follows */
391 /* we skip to selection */
392 mlti_chunk+=(selection+1)*2;
395 codec=BE_16(mlti_chunk);
397 /* skip to number of codecs */
398 mlti_chunk+=(numrules-selection)*2;
400 /* get number of codecs */
401 numrules=BE_16(mlti_chunk);
403 if (codec >= numrules) {
404 lprintf("codec index >= number of codecs. %i %i\n", codec, numrules);
410 /* now seek to selected codec */
411 for (i=0; i<codec; i++) {
412 size=BE_32(mlti_chunk);
415 size=BE_32(mlti_chunk);
417 memcpy(*out, mlti_chunk+4, size);
422 * looking at stream description.
425 rmff_header_t *real_parse_sdp(char *data, char **stream_rules, uint32_t bandwidth) {
427 sdpplin_t *desc = NULL;
428 rmff_header_t *header = NULL;
433 int max_packet_size=0;
434 int avg_packet_size=0;
437 if( !data ) return NULL;
439 desc=sdpplin_parse(data);
440 if( !desc ) return NULL;
442 buf= (char *)malloc(sizeof(char)*2048);
443 if( !buf ) goto error;
445 header = (rmff_header_t*)malloc(sizeof(rmff_header_t));
446 if( !header ) goto error;
448 memset(header, 0, sizeof(rmff_header_t));
449 header->fileheader=rmff_new_fileheader(4+desc->stream_count);
450 header->cont=rmff_new_cont(
456 header->data=rmff_new_dataheader(0,0);
457 if( !header->data ) goto error;
459 header->streams = (rmff_mdpr_t**) malloc(sizeof(rmff_mdpr_t*)*(desc->stream_count+1));
460 if( !header->streams ) goto error;
462 memset(header->streams, 0, sizeof(rmff_mdpr_t*)*(desc->stream_count+1));
463 lprintf("number of streams: %u\n", desc->stream_count);
465 for (i=0; i<desc->stream_count; i++) {
472 lprintf("calling asmrp_match with:\n%s\n%u\n", desc->stream[i]->asm_rule_book, bandwidth);
474 n=asmrp_match(desc->stream[i]->asm_rule_book, bandwidth, rulematches);
475 for (j=0; j<n; j++) {
476 lprintf("asmrp rule match: %u for stream %u\n", rulematches[j], desc->stream[i]->stream_id);
477 sprintf(b,"stream=%u;rule=%u,", desc->stream[i]->stream_id, rulematches[j]);
478 strcat(*stream_rules, b);
481 if (!desc->stream[i]->mlti_data) {
486 len=select_mlti_data(desc->stream[i]->mlti_data,
487 desc->stream[i]->mlti_data_size, rulematches[0], &buf);
489 header->streams[i]=rmff_new_mdpr(
490 desc->stream[i]->stream_id,
491 desc->stream[i]->max_bit_rate,
492 desc->stream[i]->avg_bit_rate,
493 desc->stream[i]->max_packet_size,
494 desc->stream[i]->avg_packet_size,
495 desc->stream[i]->start_time,
496 desc->stream[i]->preroll,
497 desc->stream[i]->duration,
498 desc->stream[i]->stream_name,
499 desc->stream[i]->mime_type,
502 if( !header->streams[i] ) goto error;
504 duration=MAX(duration,desc->stream[i]->duration);
505 max_bit_rate+=desc->stream[i]->max_bit_rate;
506 avg_bit_rate+=desc->stream[i]->avg_bit_rate;
507 max_packet_size=MAX(max_packet_size, desc->stream[i]->max_packet_size);
509 avg_packet_size=(avg_packet_size + desc->stream[i]->avg_packet_size) / 2;
511 avg_packet_size=desc->stream[i]->avg_packet_size;
514 if (*stream_rules && strlen(*stream_rules) && (*stream_rules)[strlen(*stream_rules)-1] == ',')
515 (*stream_rules)[strlen(*stream_rules)-1]=0; /* delete last ',' in stream_rules */
517 header->prop=rmff_new_prop(
529 if( !header->prop ) goto error;
531 rmff_fix_header(header);
533 if( desc ) sdpplin_free( desc );
538 if( desc ) sdpplin_free( desc );
539 if( header ) rmff_free_header( header );
544 int real_get_rdt_chunk_header(rtsp_client_t *rtsp_session, rmff_pheader_t *ph) {
553 n=rtsp_read_data(rtsp_session, header, 8);
555 if (header[0] != 0x24) {
556 lprintf("rdt chunk not recognized: got 0x%02x\n", header[0]);
559 size=(header[1]<<16)+(header[2]<<8)+(header[3]);
561 if ((flags1!=0x40)&&(flags1!=0x42)) {
562 lprintf("got flags1: 0x%02x\n",flags1);
563 if (header[6]==0x06) {
564 lprintf("got end of stream packet\n");
570 n=rtsp_read_data(rtsp_session, header+3, 5);
572 lprintf("ignoring bytes:\n");
573 n=rtsp_read_data(rtsp_session, header+4, 4);
578 unknown1=(header[5]<<16)+(header[6]<<8)+(header[7]);
579 n=rtsp_read_data(rtsp_session, header, 6);
584 lprintf("ts: %u size: %u, flags: 0x%02x, unknown values: %u 0x%02x 0x%02x\n",
585 ts, size, flags1, unknown1, header[4], header[5]);
589 ph->object_version=0;
591 ph->stream_number=(flags1>>1)&1;
594 ph->flags=0; /* TODO: determine keyframe flag and insert here? */
598 int real_get_rdt_chunk(rtsp_client_t *rtsp_session, rmff_pheader_t *ph,
599 unsigned char **buffer) {
602 rmff_dump_pheader(ph, (char*)*buffer);
603 n=rtsp_read_data(rtsp_session, (uint8_t*)(*buffer + 12), ph->length - 12);
604 return (n <= 0) ? 0 : n+12;
607 //! maximum size of the rtsp description, must be < INT_MAX
608 #define MAX_DESC_BUF (20 * 1024 * 1024)
609 rmff_header_t *real_setup_and_get_header(rtsp_client_t *rtsp_session, int bandwidth) {
611 char *description=NULL;
612 char *session_id=NULL;
613 rmff_header_t *h=NULL;
614 char *challenge1 = NULL;
617 char *subscribe=NULL;
618 char *buf=(char*)malloc(sizeof(char)*256);
619 char *mrl=rtsp_get_mrl(rtsp_session);
624 challenge1=strdup(rtsp_search_answers(rtsp_session,"RealChallenge1"));
625 lprintf("Challenge1: %s\n", challenge1);
627 /* request stream description */
628 rtsp_schedule_field(rtsp_session, "Accept: application/sdp");
629 sprintf(buf, "Bandwidth: %u", bandwidth);
630 rtsp_schedule_field(rtsp_session, buf);
631 rtsp_schedule_field(rtsp_session, "GUID: 00000000-0000-0000-0000-000000000000");
632 rtsp_schedule_field(rtsp_session, "RegionData: 0");
633 rtsp_schedule_field(rtsp_session, "ClientID: Linux_2.4_6.0.9.1235_play32_RN01_EN_586");
634 rtsp_schedule_field(rtsp_session, "SupportsMaximumASMBandwidth: 1");
635 rtsp_schedule_field(rtsp_session, "Language: en-US");
636 rtsp_schedule_field(rtsp_session, "Require: com.real.retain-entity-for-setup");
638 status=rtsp_request_describe(rtsp_session,NULL);
639 if ( status<200 || status>299 ) {
640 char *alert=rtsp_search_answers(rtsp_session,"Alert");
642 lprintf("real: got message from server:\n%s\n", alert);
645 rtsp_send_ok( rtsp_session );
652 /* receive description */
654 if (!rtsp_search_answers(rtsp_session,"Content-length"))
655 lprintf("real: got no Content-length!\n");
657 size=atoi(rtsp_search_answers(rtsp_session,"Content-length"));
659 if (size > MAX_DESC_BUF) {
660 printf("real: Content-length for description too big (> %uMB)!\n",
661 MAX_DESC_BUF/(1024*1024) );
665 if (!rtsp_search_answers(rtsp_session,"ETag"))
666 lprintf("real: got no ETag!\n");
668 session_id=strdup(rtsp_search_answers(rtsp_session,"ETag"));
670 lprintf("Stream description size: %i\n", size);
672 description = (char*)malloc(sizeof(char)*(size+1));
675 if( rtsp_read_data(rtsp_session, (uint8_t*)description, size) <= 0)
678 //fprintf(stderr, "%s", description);
680 /* parse sdp (sdpplin) and create a header and a subscribe string */
681 subscribe = (char *) malloc(sizeof(char)*256);
685 strcpy(subscribe, "Subscribe: ");
686 h=real_parse_sdp(description, &subscribe, bandwidth);
693 fprintf("Title: %s\nCopyright: %s\nAuthor: %s\nStreams: %i\n",
694 h->cont->title, h->cont->copyright, h->cont->author, h->prop->num_streams);
697 /* setup our streams */
698 real_calc_response_and_checksum (challenge2, checksum, challenge1);
699 buf = realloc(buf, strlen(challenge2) + strlen(checksum) + 32);
700 sprintf(buf, "RealChallenge2: %s, sd=%s", challenge2, checksum);
701 rtsp_schedule_field(rtsp_session, buf);
702 buf = realloc(buf, strlen(session_id) + 32);
703 sprintf(buf, "If-Match: %s", session_id);
704 rtsp_schedule_field(rtsp_session, buf);
705 rtsp_schedule_field(rtsp_session, "Transport: x-pn-tng/tcp;mode=play,rtp/avp/tcp;unicast;mode=play");
706 buf = realloc(buf, strlen(mrl) + 32);
707 sprintf(buf, "%s/streamid=0", mrl);
708 rtsp_request_setup(rtsp_session,buf);
710 if (h->prop->num_streams > 1) {
711 rtsp_schedule_field(rtsp_session, "Transport: x-pn-tng/tcp;mode=play,rtp/avp/tcp;unicast;mode=play");
712 buf = realloc(buf, strlen(session_id) + 32);
713 sprintf(buf, "If-Match: %s", session_id);
714 rtsp_schedule_field(rtsp_session, buf);
715 buf = realloc(buf, strlen(mrl) + 32);
716 sprintf(buf, "%s/streamid=1", mrl);
717 rtsp_request_setup(rtsp_session,buf);
719 /* set stream parameter (bandwidth) with our subscribe string */
720 rtsp_schedule_field(rtsp_session, subscribe);
721 rtsp_request_setparameter(rtsp_session,NULL);
723 /* and finally send a play request */
724 rtsp_schedule_field(rtsp_session, "Range: npt=0-");
725 rtsp_request_play(rtsp_session,NULL);
735 if( h ) rmff_free_header( h );