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 *****************************************************************************/
32 #include "real_sdpplin.h"
34 const unsigned char xor_table[] = {
35 0x05, 0x18, 0x74, 0xd0, 0x0d, 0x09, 0x02, 0x53,
36 0xc0, 0x01, 0x05, 0x05, 0x67, 0x03, 0x19, 0x70,
37 0x08, 0x27, 0x66, 0x10, 0x10, 0x72, 0x08, 0x09,
38 0x63, 0x11, 0x03, 0x71, 0x08, 0x08, 0x70, 0x02,
39 0x10, 0x57, 0x05, 0x18, 0x54, 0x00, 0x00, 0x00 };
41 #define BE_32(x) GetDWBE(x)
42 #define LE_32(x) GetDWLE(x)
43 #define BE_16(x) GetWBE(x)
44 #define LE_16(x) GetWLE(x)
45 #define BE_32C(x,y) do {uint32_t in=y; *(uint32_t *)(x)=GetDWBE(&in);} while(0)
46 #define LE_32C(x,y) do {uint32_t in=y; *(uint32_t *)(x)=GetDWLE(&in);} while(0)
47 #define MAX(x,y) ((x>y) ? x : y)
50 static void hash(char *field, char *param)
60 lprintf("hash input: %x %x %x %x\n", a, b, c, d);
61 lprintf("hash parameter:\n");
63 a = ((b & c) | (~b & d)) + LE_32((param+0x00)) + a - 0x28955B88;
64 a = ((a << 0x07) | (a >> 0x19)) + b;
65 d = ((a & b) | (~a & c)) + LE_32((param+0x04)) + d - 0x173848AA;
66 d = ((d << 0x0c) | (d >> 0x14)) + a;
67 c = ((d & a) | (~d & b)) + LE_32((param+0x08)) + c + 0x242070DB;
68 c = ((c << 0x11) | (c >> 0x0f)) + d;
69 b = ((c & d) | (~c & a)) + LE_32((param+0x0c)) + b - 0x3E423112;
70 b = ((b << 0x16) | (b >> 0x0a)) + c;
71 a = ((b & c) | (~b & d)) + LE_32((param+0x10)) + a - 0x0A83F051;
72 a = ((a << 0x07) | (a >> 0x19)) + b;
73 d = ((a & b) | (~a & c)) + LE_32((param+0x14)) + d + 0x4787C62A;
74 d = ((d << 0x0c) | (d >> 0x14)) + a;
75 c = ((d & a) | (~d & b)) + LE_32((param+0x18)) + c - 0x57CFB9ED;
76 c = ((c << 0x11) | (c >> 0x0f)) + d;
77 b = ((c & d) | (~c & a)) + LE_32((param+0x1c)) + b - 0x02B96AFF;
78 b = ((b << 0x16) | (b >> 0x0a)) + c;
79 a = ((b & c) | (~b & d)) + LE_32((param+0x20)) + a + 0x698098D8;
80 a = ((a << 0x07) | (a >> 0x19)) + b;
81 d = ((a & b) | (~a & c)) + LE_32((param+0x24)) + d - 0x74BB0851;
82 d = ((d << 0x0c) | (d >> 0x14)) + a;
83 c = ((d & a) | (~d & b)) + LE_32((param+0x28)) + c - 0x0000A44F;
84 c = ((c << 0x11) | (c >> 0x0f)) + d;
85 b = ((c & d) | (~c & a)) + LE_32((param+0x2C)) + b - 0x76A32842;
86 b = ((b << 0x16) | (b >> 0x0a)) + c;
87 a = ((b & c) | (~b & d)) + LE_32((param+0x30)) + a + 0x6B901122;
88 a = ((a << 0x07) | (a >> 0x19)) + b;
89 d = ((a & b) | (~a & c)) + LE_32((param+0x34)) + d - 0x02678E6D;
90 d = ((d << 0x0c) | (d >> 0x14)) + a;
91 c = ((d & a) | (~d & b)) + LE_32((param+0x38)) + c - 0x5986BC72;
92 c = ((c << 0x11) | (c >> 0x0f)) + d;
93 b = ((c & d) | (~c & a)) + LE_32((param+0x3c)) + b + 0x49B40821;
94 b = ((b << 0x16) | (b >> 0x0a)) + c;
96 a = ((b & d) | (~d & c)) + LE_32((param+0x04)) + a - 0x09E1DA9E;
97 a = ((a << 0x05) | (a >> 0x1b)) + b;
98 d = ((a & c) | (~c & b)) + LE_32((param+0x18)) + d - 0x3FBF4CC0;
99 d = ((d << 0x09) | (d >> 0x17)) + a;
100 c = ((d & b) | (~b & a)) + LE_32((param+0x2c)) + c + 0x265E5A51;
101 c = ((c << 0x0e) | (c >> 0x12)) + d;
102 b = ((c & a) | (~a & d)) + LE_32((param+0x00)) + b - 0x16493856;
103 b = ((b << 0x14) | (b >> 0x0c)) + c;
104 a = ((b & d) | (~d & c)) + LE_32((param+0x14)) + a - 0x29D0EFA3;
105 a = ((a << 0x05) | (a >> 0x1b)) + b;
106 d = ((a & c) | (~c & b)) + LE_32((param+0x28)) + d + 0x02441453;
107 d = ((d << 0x09) | (d >> 0x17)) + a;
108 c = ((d & b) | (~b & a)) + LE_32((param+0x3c)) + c - 0x275E197F;
109 c = ((c << 0x0e) | (c >> 0x12)) + d;
110 b = ((c & a) | (~a & d)) + LE_32((param+0x10)) + b - 0x182C0438;
111 b = ((b << 0x14) | (b >> 0x0c)) + c;
112 a = ((b & d) | (~d & c)) + LE_32((param+0x24)) + a + 0x21E1CDE6;
113 a = ((a << 0x05) | (a >> 0x1b)) + b;
114 d = ((a & c) | (~c & b)) + LE_32((param+0x38)) + d - 0x3CC8F82A;
115 d = ((d << 0x09) | (d >> 0x17)) + a;
116 c = ((d & b) | (~b & a)) + LE_32((param+0x0c)) + c - 0x0B2AF279;
117 c = ((c << 0x0e) | (c >> 0x12)) + d;
118 b = ((c & a) | (~a & d)) + LE_32((param+0x20)) + b + 0x455A14ED;
119 b = ((b << 0x14) | (b >> 0x0c)) + c;
120 a = ((b & d) | (~d & c)) + LE_32((param+0x34)) + a - 0x561C16FB;
121 a = ((a << 0x05) | (a >> 0x1b)) + b;
122 d = ((a & c) | (~c & b)) + LE_32((param+0x08)) + d - 0x03105C08;
123 d = ((d << 0x09) | (d >> 0x17)) + a;
124 c = ((d & b) | (~b & a)) + LE_32((param+0x1c)) + c + 0x676F02D9;
125 c = ((c << 0x0e) | (c >> 0x12)) + d;
126 b = ((c & a) | (~a & d)) + LE_32((param+0x30)) + b - 0x72D5B376;
127 b = ((b << 0x14) | (b >> 0x0c)) + c;
129 a = (b ^ c ^ d) + LE_32((param+0x14)) + a - 0x0005C6BE;
130 a = ((a << 0x04) | (a >> 0x1c)) + b;
131 d = (a ^ b ^ c) + LE_32((param+0x20)) + d - 0x788E097F;
132 d = ((d << 0x0b) | (d >> 0x15)) + a;
133 c = (d ^ a ^ b) + LE_32((param+0x2c)) + c + 0x6D9D6122;
134 c = ((c << 0x10) | (c >> 0x10)) + d;
135 b = (c ^ d ^ a) + LE_32((param+0x38)) + b - 0x021AC7F4;
136 b = ((b << 0x17) | (b >> 0x09)) + c;
137 a = (b ^ c ^ d) + LE_32((param+0x04)) + a - 0x5B4115BC;
138 a = ((a << 0x04) | (a >> 0x1c)) + b;
139 d = (a ^ b ^ c) + LE_32((param+0x10)) + d + 0x4BDECFA9;
140 d = ((d << 0x0b) | (d >> 0x15)) + a;
141 c = (d ^ a ^ b) + LE_32((param+0x1c)) + c - 0x0944B4A0;
142 c = ((c << 0x10) | (c >> 0x10)) + d;
143 b = (c ^ d ^ a) + LE_32((param+0x28)) + b - 0x41404390;
144 b = ((b << 0x17) | (b >> 0x09)) + c;
145 a = (b ^ c ^ d) + LE_32((param+0x34)) + a + 0x289B7EC6;
146 a = ((a << 0x04) | (a >> 0x1c)) + b;
147 d = (a ^ b ^ c) + LE_32((param+0x00)) + d - 0x155ED806;
148 d = ((d << 0x0b) | (d >> 0x15)) + a;
149 c = (d ^ a ^ b) + LE_32((param+0x0c)) + c - 0x2B10CF7B;
150 c = ((c << 0x10) | (c >> 0x10)) + d;
151 b = (c ^ d ^ a) + LE_32((param+0x18)) + b + 0x04881D05;
152 b = ((b << 0x17) | (b >> 0x09)) + c;
153 a = (b ^ c ^ d) + LE_32((param+0x24)) + a - 0x262B2FC7;
154 a = ((a << 0x04) | (a >> 0x1c)) + b;
155 d = (a ^ b ^ c) + LE_32((param+0x30)) + d - 0x1924661B;
156 d = ((d << 0x0b) | (d >> 0x15)) + a;
157 c = (d ^ a ^ b) + LE_32((param+0x3c)) + c + 0x1fa27cf8;
158 c = ((c << 0x10) | (c >> 0x10)) + d;
159 b = (c ^ d ^ a) + LE_32((param+0x08)) + b - 0x3B53A99B;
160 b = ((b << 0x17) | (b >> 0x09)) + c;
162 a = ((~d | b) ^ c) + LE_32((param+0x00)) + a - 0x0BD6DDBC;
163 a = ((a << 0x06) | (a >> 0x1a)) + b;
164 d = ((~c | a) ^ b) + LE_32((param+0x1c)) + d + 0x432AFF97;
165 d = ((d << 0x0a) | (d >> 0x16)) + a;
166 c = ((~b | d) ^ a) + LE_32((param+0x38)) + c - 0x546BDC59;
167 c = ((c << 0x0f) | (c >> 0x11)) + d;
168 b = ((~a | c) ^ d) + LE_32((param+0x14)) + b - 0x036C5FC7;
169 b = ((b << 0x15) | (b >> 0x0b)) + c;
170 a = ((~d | b) ^ c) + LE_32((param+0x30)) + a + 0x655B59C3;
171 a = ((a << 0x06) | (a >> 0x1a)) + b;
172 d = ((~c | a) ^ b) + LE_32((param+0x0C)) + d - 0x70F3336E;
173 d = ((d << 0x0a) | (d >> 0x16)) + a;
174 c = ((~b | d) ^ a) + LE_32((param+0x28)) + c - 0x00100B83;
175 c = ((c << 0x0f) | (c >> 0x11)) + d;
176 b = ((~a | c) ^ d) + LE_32((param+0x04)) + b - 0x7A7BA22F;
177 b = ((b << 0x15) | (b >> 0x0b)) + c;
178 a = ((~d | b) ^ c) + LE_32((param+0x20)) + a + 0x6FA87E4F;
179 a = ((a << 0x06) | (a >> 0x1a)) + b;
180 d = ((~c | a) ^ b) + LE_32((param+0x3c)) + d - 0x01D31920;
181 d = ((d << 0x0a) | (d >> 0x16)) + a;
182 c = ((~b | d) ^ a) + LE_32((param+0x18)) + c - 0x5CFEBCEC;
183 c = ((c << 0x0f) | (c >> 0x11)) + d;
184 b = ((~a | c) ^ d) + LE_32((param+0x34)) + b + 0x4E0811A1;
185 b = ((b << 0x15) | (b >> 0x0b)) + c;
186 a = ((~d | b) ^ c) + LE_32((param+0x10)) + a - 0x08AC817E;
187 a = ((a << 0x06) | (a >> 0x1a)) + b;
188 d = ((~c | a) ^ b) + LE_32((param+0x2c)) + d - 0x42C50DCB;
189 d = ((d << 0x0a) | (d >> 0x16)) + a;
190 c = ((~b | d) ^ a) + LE_32((param+0x08)) + c + 0x2AD7D2BB;
191 c = ((c << 0x0f) | (c >> 0x11)) + d;
192 b = ((~a | c) ^ d) + LE_32((param+0x24)) + b - 0x14792C6F;
193 b = ((b << 0x15) | (b >> 0x0b)) + c;
195 lprintf("hash output: %x %x %x %x\n", a, b, c, d);
200 d += LE_32(field+12);
208 static void call_hash (char *key, char *challenge, int len) {
210 uint8_t *ptr1, *ptr2;
211 uint32_t a, b, c, d, tmp;
213 ptr1=(uint8_t*)(key+16);
214 ptr2=(uint8_t*)(key+20);
221 if (a < (uint32_t)(len << 3))
223 lprintf("not verified: (len << 3) > a true\n");
227 tmp = LE_32(ptr2) + (len >> 0x1d);
231 if (a <= (uint32_t)len)
233 memcpy(key+b+24, challenge, a);
238 while ( d < (uint32_t)len ) {
239 lprintf("not verified: while ( d < len )\n");
240 hash(key, challenge+d-0x3f);
247 memcpy(key+b+24, challenge+c, len-c);
250 static void calc_response (char *result, char *field) {
255 memset (buf1, 0, 64);
258 memcpy (buf2, field+16, 8);
259 i = ( LE_32((buf2)) >> 3 ) & 0x3f;
266 lprintf("not verified: ! (i < 56)\n");
270 call_hash (field, buf1, i);
271 call_hash (field, buf2, 8);
272 memcpy (result, field, 16);
275 static void calc_response_string (char *result, char *challenge) {
280 /* initialize our field */
281 BE_32C (field, 0x01234567);
282 BE_32C ((field+4), 0x89ABCDEF);
283 BE_32C ((field+8), 0xFEDCBA98);
284 BE_32C ((field+12), 0x76543210);
285 BE_32C ((field+16), 0x00000000);
286 BE_32C ((field+20), 0x00000000);
288 /* calculate response */
289 call_hash(field, challenge, 64);
290 calc_response(zres,field);
292 /* convert zres to ascii string */
293 for (i=0; i<16; i++ ) {
296 a = (zres[i] >> 4) & 15;
299 result[i*2] = ((a<10) ? (a+48) : (a+87)) & 255;
300 result[i*2+1] = ((b<10) ? (b+48) : (b+87)) & 255;
304 void real_calc_response_and_checksum (char *response, char *chksum, char *challenge) {
306 int ch_len, table_len, resp_len;
311 /* initialize return values */
312 memset(response, 0, 64);
313 memset(chksum, 0, 34);
315 /* initialize buffer */
318 BE_32C(ptr, 0xa1e9149d);
320 BE_32C(ptr, 0x0e6b3b59);
323 /* some (length) checks */
324 if (challenge != NULL)
326 ch_len = strlen (challenge);
328 if (ch_len == 40) /* what a hack... */
333 if ( ch_len > 56 ) ch_len=56;
335 /* copy challenge to buf */
336 memcpy(ptr, challenge, ch_len);
339 if (xor_table != NULL)
341 table_len = strlen((char *)xor_table);
343 if (table_len > 56) table_len=56;
345 /* xor challenge bytewise with xor_table */
346 for (i=0; i<table_len; i++)
347 ptr[i] = ptr[i] ^ xor_table[i];
350 calc_response_string (response, buf);
353 resp_len = strlen (response);
354 strcpy (&response[resp_len], "01d0a8e3");
356 /* calculate checksum */
357 for (i=0; i<resp_len/4; i++)
358 chksum[i] = response[i*4];
363 * takes a MLTI-Chunk and a rule number got from match_asm_rule,
364 * returns a pointer to selected data and number of bytes in that.
366 static int select_mlti_data(const char *mlti_chunk, int mlti_size, int selection, char **out) {
368 int numrules, codec, size;
371 /* MLTI chunk should begin with MLTI */
372 if ((mlti_chunk[0] != 'M')
373 ||(mlti_chunk[1] != 'L')
374 ||(mlti_chunk[2] != 'T')
375 ||(mlti_chunk[3] != 'I'))
377 lprintf("MLTI tag not detected, copying data\n");
378 memcpy(*out, mlti_chunk, mlti_size);
384 /* next 16 bits are the number of rules */
385 numrules=BE_16(mlti_chunk);
386 if (selection >= numrules) return 0;
388 /* now <numrules> indices of codecs follows */
389 /* we skip to selection */
390 mlti_chunk+=(selection+1)*2;
393 codec=BE_16(mlti_chunk);
395 /* skip to number of codecs */
396 mlti_chunk+=(numrules-selection)*2;
398 /* get number of codecs */
399 numrules=BE_16(mlti_chunk);
401 if (codec >= numrules) {
402 lprintf("codec index >= number of codecs. %i %i\n", codec, numrules);
408 /* now seek to selected codec */
409 for (i=0; i<codec; i++) {
410 size=BE_32(mlti_chunk);
413 size=BE_32(mlti_chunk);
415 memcpy(*out, mlti_chunk+4, size);
420 * looking at stream description.
423 rmff_header_t *real_parse_sdp(char *data, char **stream_rules, uint32_t bandwidth) {
425 sdpplin_t *desc = NULL;
426 rmff_header_t *header = NULL;
431 int max_packet_size=0;
432 int avg_packet_size=0;
435 if( !data ) return NULL;
437 desc=sdpplin_parse(data);
438 if( !desc ) return NULL;
440 buf= (char *)malloc(sizeof(char)*2048);
441 if( !buf ) goto error;
443 header = (rmff_header_t*)malloc(sizeof(rmff_header_t));
444 if( !header ) goto error;
446 memset(header, 0, sizeof(rmff_header_t));
447 header->fileheader=rmff_new_fileheader(4+desc->stream_count);
448 header->cont=rmff_new_cont(
454 header->data=rmff_new_dataheader(0,0);
455 if( !header->data ) goto error;
457 header->streams = (rmff_mdpr_t**) malloc(sizeof(rmff_mdpr_t*)*(desc->stream_count+1));
458 if( !header->streams ) goto error;
460 memset(header->streams, 0, sizeof(rmff_mdpr_t*)*(desc->stream_count+1));
461 lprintf("number of streams: %u\n", desc->stream_count);
463 for (i=0; i<desc->stream_count; i++) {
470 lprintf("calling asmrp_match with:\n%s\n%u\n", desc->stream[i]->asm_rule_book, bandwidth);
472 n=asmrp_match(desc->stream[i]->asm_rule_book, bandwidth, rulematches);
473 for (j=0; j<n; j++) {
474 lprintf("asmrp rule match: %u for stream %u\n", rulematches[j], desc->stream[i]->stream_id);
475 sprintf(b,"stream=%u;rule=%u,", desc->stream[i]->stream_id, rulematches[j]);
476 strcat(*stream_rules, b);
479 if (!desc->stream[i]->mlti_data) {
481 if( buf ) free( buf );
484 len=select_mlti_data(desc->stream[i]->mlti_data,
485 desc->stream[i]->mlti_data_size, rulematches[0], &buf);
487 header->streams[i]=rmff_new_mdpr(
488 desc->stream[i]->stream_id,
489 desc->stream[i]->max_bit_rate,
490 desc->stream[i]->avg_bit_rate,
491 desc->stream[i]->max_packet_size,
492 desc->stream[i]->avg_packet_size,
493 desc->stream[i]->start_time,
494 desc->stream[i]->preroll,
495 desc->stream[i]->duration,
496 desc->stream[i]->stream_name,
497 desc->stream[i]->mime_type,
500 if( !header->streams[i] ) goto error;
502 duration=MAX(duration,desc->stream[i]->duration);
503 max_bit_rate+=desc->stream[i]->max_bit_rate;
504 avg_bit_rate+=desc->stream[i]->avg_bit_rate;
505 max_packet_size=MAX(max_packet_size, desc->stream[i]->max_packet_size);
507 avg_packet_size=(avg_packet_size + desc->stream[i]->avg_packet_size) / 2;
509 avg_packet_size=desc->stream[i]->avg_packet_size;
512 if (*stream_rules && strlen(*stream_rules) && (*stream_rules)[strlen(*stream_rules)-1] == ',')
513 (*stream_rules)[strlen(*stream_rules)-1]=0; /* delete last ',' in stream_rules */
515 header->prop=rmff_new_prop(
527 if( !header->prop ) goto error;
529 rmff_fix_header(header);
531 if( desc ) sdpplin_free( desc );
536 if( desc ) sdpplin_free( desc );
537 if( header ) rmff_free_header( header );
538 if( buf ) free( buf );
542 int real_get_rdt_chunk_header(rtsp_client_t *rtsp_session, rmff_pheader_t *ph) {
551 n=rtsp_read_data(rtsp_session, header, 8);
553 if (header[0] != 0x24) {
554 lprintf("rdt chunk not recognized: got 0x%02x\n", header[0]);
557 size=(header[1]<<16)+(header[2]<<8)+(header[3]);
559 if ((flags1!=0x40)&&(flags1!=0x42)) {
560 lprintf("got flags1: 0x%02x\n",flags1);
561 if (header[6]==0x06) {
562 lprintf("got end of stream packet\n");
568 n=rtsp_read_data(rtsp_session, header+3, 5);
570 lprintf("ignoring bytes:\n");
571 n=rtsp_read_data(rtsp_session, header+4, 4);
576 unknown1=(header[5]<<16)+(header[6]<<8)+(header[7]);
577 n=rtsp_read_data(rtsp_session, header, 6);
582 lprintf("ts: %u size: %u, flags: 0x%02x, unknown values: %u 0x%02x 0x%02x\n",
583 ts, size, flags1, unknown1, header[4], header[5]);
587 ph->object_version=0;
589 ph->stream_number=(flags1>>1)&1;
592 ph->flags=0; /* TODO: determine keyframe flag and insert here? */
596 int real_get_rdt_chunk(rtsp_client_t *rtsp_session, rmff_pheader_t *ph,
597 unsigned char **buffer) {
600 rmff_dump_pheader(ph, (char*)*buffer);
601 n=rtsp_read_data(rtsp_session, (uint8_t*)(*buffer + 12), ph->length - 12);
602 return (n <= 0) ? 0 : n+12;
605 //! maximum size of the rtsp description, must be < INT_MAX
606 #define MAX_DESC_BUF (20 * 1024 * 1024)
607 rmff_header_t *real_setup_and_get_header(rtsp_client_t *rtsp_session, int bandwidth) {
609 char *description=NULL;
610 char *session_id=NULL;
611 rmff_header_t *h=NULL;
612 char *challenge1 = NULL;
615 char *subscribe=NULL;
616 char *buf=(char*)malloc(sizeof(char)*256);
617 char *mrl=rtsp_get_mrl(rtsp_session);
622 challenge1=strdup(rtsp_search_answers(rtsp_session,"RealChallenge1"));
623 lprintf("Challenge1: %s\n", challenge1);
625 /* request stream description */
626 rtsp_schedule_field(rtsp_session, "Accept: application/sdp");
627 sprintf(buf, "Bandwidth: %u", bandwidth);
628 rtsp_schedule_field(rtsp_session, buf);
629 rtsp_schedule_field(rtsp_session, "GUID: 00000000-0000-0000-0000-000000000000");
630 rtsp_schedule_field(rtsp_session, "RegionData: 0");
631 rtsp_schedule_field(rtsp_session, "ClientID: Linux_2.4_6.0.9.1235_play32_RN01_EN_586");
632 rtsp_schedule_field(rtsp_session, "SupportsMaximumASMBandwidth: 1");
633 rtsp_schedule_field(rtsp_session, "Language: en-US");
634 rtsp_schedule_field(rtsp_session, "Require: com.real.retain-entity-for-setup");
636 status=rtsp_request_describe(rtsp_session,NULL);
637 if ( status<200 || status>299 ) {
638 char *alert=rtsp_search_answers(rtsp_session,"Alert");
640 lprintf("real: got message from server:\n%s\n", alert);
643 rtsp_send_ok(rtsp_session);
644 if( challenge1 ) free(challenge1);
645 if( alert ) free(alert);
650 /* receive description */
652 if (!rtsp_search_answers(rtsp_session,"Content-length"))
653 lprintf("real: got no Content-length!\n");
655 size=atoi(rtsp_search_answers(rtsp_session,"Content-length"));
657 if (size > MAX_DESC_BUF) {
658 printf("real: Content-length for description too big (> %uMB)!\n",
659 MAX_DESC_BUF/(1024*1024) );
663 if (!rtsp_search_answers(rtsp_session,"ETag"))
664 lprintf("real: got no ETag!\n");
666 session_id=strdup(rtsp_search_answers(rtsp_session,"ETag"));
668 lprintf("Stream description size: %i\n", size);
670 description = (char*)malloc(sizeof(char)*(size+1));
673 if( rtsp_read_data(rtsp_session, (uint8_t*)description, size) <= 0)
676 //fprintf(stderr, "%s", description);
678 /* parse sdp (sdpplin) and create a header and a subscribe string */
679 subscribe = (char *) malloc(sizeof(char)*256);
683 strcpy(subscribe, "Subscribe: ");
684 h=real_parse_sdp(description, &subscribe, bandwidth);
691 fprintf("Title: %s\nCopyright: %s\nAuthor: %s\nStreams: %i\n",
692 h->cont->title, h->cont->copyright, h->cont->author, h->prop->num_streams);
695 /* setup our streams */
696 real_calc_response_and_checksum (challenge2, checksum, challenge1);
697 buf = realloc(buf, strlen(challenge2) + strlen(checksum) + 32);
698 sprintf(buf, "RealChallenge2: %s, sd=%s", challenge2, checksum);
699 rtsp_schedule_field(rtsp_session, buf);
700 buf = realloc(buf, strlen(session_id) + 32);
701 sprintf(buf, "If-Match: %s", session_id);
702 rtsp_schedule_field(rtsp_session, buf);
703 rtsp_schedule_field(rtsp_session, "Transport: x-pn-tng/tcp;mode=play,rtp/avp/tcp;unicast;mode=play");
704 buf = realloc(buf, strlen(mrl) + 32);
705 sprintf(buf, "%s/streamid=0", mrl);
706 rtsp_request_setup(rtsp_session,buf);
708 if (h->prop->num_streams > 1) {
709 rtsp_schedule_field(rtsp_session, "Transport: x-pn-tng/tcp;mode=play,rtp/avp/tcp;unicast;mode=play");
710 buf = realloc(buf, strlen(session_id) + 32);
711 sprintf(buf, "If-Match: %s", session_id);
712 rtsp_schedule_field(rtsp_session, buf);
713 buf = realloc(buf, strlen(mrl) + 32);
714 sprintf(buf, "%s/streamid=1", mrl);
715 rtsp_request_setup(rtsp_session,buf);
717 /* set stream parameter (bandwidth) with our subscribe string */
718 rtsp_schedule_field(rtsp_session, subscribe);
719 rtsp_request_setparameter(rtsp_session,NULL);
721 /* and finally send a play request */
722 rtsp_schedule_field(rtsp_session, "Range: npt=0-");
723 rtsp_request_play(rtsp_session,NULL);
725 if( challenge1 ) free( challenge1 );
726 if( session_id ) free( session_id );
727 if( description ) free(description);
728 if( subscribe ) free(subscribe);
733 if( h ) rmff_free_header( h );
734 if( challenge1 ) free( challenge1 );
735 if( session_id ) free( session_id );
736 if( description ) free(description);
737 if( subscribe ) free(subscribe);