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 *****************************************************************************/
30 #include "real_sdpplin.h"
32 const unsigned char xor_table[] = {
33 0x05, 0x18, 0x74, 0xd0, 0x0d, 0x09, 0x02, 0x53,
34 0xc0, 0x01, 0x05, 0x05, 0x67, 0x03, 0x19, 0x70,
35 0x08, 0x27, 0x66, 0x10, 0x10, 0x72, 0x08, 0x09,
36 0x63, 0x11, 0x03, 0x71, 0x08, 0x08, 0x70, 0x02,
37 0x10, 0x57, 0x05, 0x18, 0x54, 0x00, 0x00, 0x00 };
39 #define BE_32(x) GetDWBE(x)
40 #define LE_32(x) GetDWLE(x)
41 #define BE_16(x) GetWBE(x)
42 #define LE_16(x) GetWLE(x)
43 #define BE_32C(x,y) do {uint32_t in=y; *(uint32_t *)(x)=GetDWBE(&in);} while(0)
44 #define LE_32C(x,y) do {uint32_t in=y; *(uint32_t *)(x)=GetDWLE(&in);} while(0)
45 #define MAX(x,y) ((x>y) ? x : y)
48 static void hash(char *field, char *param)
58 lprintf("hash input: %x %x %x %x\n", a, b, c, d);
59 lprintf("hash parameter:\n");
61 a = ((b & c) | (~b & d)) + LE_32((param+0x00)) + a - 0x28955B88;
62 a = ((a << 0x07) | (a >> 0x19)) + b;
63 d = ((a & b) | (~a & c)) + LE_32((param+0x04)) + d - 0x173848AA;
64 d = ((d << 0x0c) | (d >> 0x14)) + a;
65 c = ((d & a) | (~d & b)) + LE_32((param+0x08)) + c + 0x242070DB;
66 c = ((c << 0x11) | (c >> 0x0f)) + d;
67 b = ((c & d) | (~c & a)) + LE_32((param+0x0c)) + b - 0x3E423112;
68 b = ((b << 0x16) | (b >> 0x0a)) + c;
69 a = ((b & c) | (~b & d)) + LE_32((param+0x10)) + a - 0x0A83F051;
70 a = ((a << 0x07) | (a >> 0x19)) + b;
71 d = ((a & b) | (~a & c)) + LE_32((param+0x14)) + d + 0x4787C62A;
72 d = ((d << 0x0c) | (d >> 0x14)) + a;
73 c = ((d & a) | (~d & b)) + LE_32((param+0x18)) + c - 0x57CFB9ED;
74 c = ((c << 0x11) | (c >> 0x0f)) + d;
75 b = ((c & d) | (~c & a)) + LE_32((param+0x1c)) + b - 0x02B96AFF;
76 b = ((b << 0x16) | (b >> 0x0a)) + c;
77 a = ((b & c) | (~b & d)) + LE_32((param+0x20)) + a + 0x698098D8;
78 a = ((a << 0x07) | (a >> 0x19)) + b;
79 d = ((a & b) | (~a & c)) + LE_32((param+0x24)) + d - 0x74BB0851;
80 d = ((d << 0x0c) | (d >> 0x14)) + a;
81 c = ((d & a) | (~d & b)) + LE_32((param+0x28)) + c - 0x0000A44F;
82 c = ((c << 0x11) | (c >> 0x0f)) + d;
83 b = ((c & d) | (~c & a)) + LE_32((param+0x2C)) + b - 0x76A32842;
84 b = ((b << 0x16) | (b >> 0x0a)) + c;
85 a = ((b & c) | (~b & d)) + LE_32((param+0x30)) + a + 0x6B901122;
86 a = ((a << 0x07) | (a >> 0x19)) + b;
87 d = ((a & b) | (~a & c)) + LE_32((param+0x34)) + d - 0x02678E6D;
88 d = ((d << 0x0c) | (d >> 0x14)) + a;
89 c = ((d & a) | (~d & b)) + LE_32((param+0x38)) + c - 0x5986BC72;
90 c = ((c << 0x11) | (c >> 0x0f)) + d;
91 b = ((c & d) | (~c & a)) + LE_32((param+0x3c)) + b + 0x49B40821;
92 b = ((b << 0x16) | (b >> 0x0a)) + c;
94 a = ((b & d) | (~d & c)) + LE_32((param+0x04)) + a - 0x09E1DA9E;
95 a = ((a << 0x05) | (a >> 0x1b)) + b;
96 d = ((a & c) | (~c & b)) + LE_32((param+0x18)) + d - 0x3FBF4CC0;
97 d = ((d << 0x09) | (d >> 0x17)) + a;
98 c = ((d & b) | (~b & a)) + LE_32((param+0x2c)) + c + 0x265E5A51;
99 c = ((c << 0x0e) | (c >> 0x12)) + d;
100 b = ((c & a) | (~a & d)) + LE_32((param+0x00)) + b - 0x16493856;
101 b = ((b << 0x14) | (b >> 0x0c)) + c;
102 a = ((b & d) | (~d & c)) + LE_32((param+0x14)) + a - 0x29D0EFA3;
103 a = ((a << 0x05) | (a >> 0x1b)) + b;
104 d = ((a & c) | (~c & b)) + LE_32((param+0x28)) + d + 0x02441453;
105 d = ((d << 0x09) | (d >> 0x17)) + a;
106 c = ((d & b) | (~b & a)) + LE_32((param+0x3c)) + c - 0x275E197F;
107 c = ((c << 0x0e) | (c >> 0x12)) + d;
108 b = ((c & a) | (~a & d)) + LE_32((param+0x10)) + b - 0x182C0438;
109 b = ((b << 0x14) | (b >> 0x0c)) + c;
110 a = ((b & d) | (~d & c)) + LE_32((param+0x24)) + a + 0x21E1CDE6;
111 a = ((a << 0x05) | (a >> 0x1b)) + b;
112 d = ((a & c) | (~c & b)) + LE_32((param+0x38)) + d - 0x3CC8F82A;
113 d = ((d << 0x09) | (d >> 0x17)) + a;
114 c = ((d & b) | (~b & a)) + LE_32((param+0x0c)) + c - 0x0B2AF279;
115 c = ((c << 0x0e) | (c >> 0x12)) + d;
116 b = ((c & a) | (~a & d)) + LE_32((param+0x20)) + b + 0x455A14ED;
117 b = ((b << 0x14) | (b >> 0x0c)) + c;
118 a = ((b & d) | (~d & c)) + LE_32((param+0x34)) + a - 0x561C16FB;
119 a = ((a << 0x05) | (a >> 0x1b)) + b;
120 d = ((a & c) | (~c & b)) + LE_32((param+0x08)) + d - 0x03105C08;
121 d = ((d << 0x09) | (d >> 0x17)) + a;
122 c = ((d & b) | (~b & a)) + LE_32((param+0x1c)) + c + 0x676F02D9;
123 c = ((c << 0x0e) | (c >> 0x12)) + d;
124 b = ((c & a) | (~a & d)) + LE_32((param+0x30)) + b - 0x72D5B376;
125 b = ((b << 0x14) | (b >> 0x0c)) + c;
127 a = (b ^ c ^ d) + LE_32((param+0x14)) + a - 0x0005C6BE;
128 a = ((a << 0x04) | (a >> 0x1c)) + b;
129 d = (a ^ b ^ c) + LE_32((param+0x20)) + d - 0x788E097F;
130 d = ((d << 0x0b) | (d >> 0x15)) + a;
131 c = (d ^ a ^ b) + LE_32((param+0x2c)) + c + 0x6D9D6122;
132 c = ((c << 0x10) | (c >> 0x10)) + d;
133 b = (c ^ d ^ a) + LE_32((param+0x38)) + b - 0x021AC7F4;
134 b = ((b << 0x17) | (b >> 0x09)) + c;
135 a = (b ^ c ^ d) + LE_32((param+0x04)) + a - 0x5B4115BC;
136 a = ((a << 0x04) | (a >> 0x1c)) + b;
137 d = (a ^ b ^ c) + LE_32((param+0x10)) + d + 0x4BDECFA9;
138 d = ((d << 0x0b) | (d >> 0x15)) + a;
139 c = (d ^ a ^ b) + LE_32((param+0x1c)) + c - 0x0944B4A0;
140 c = ((c << 0x10) | (c >> 0x10)) + d;
141 b = (c ^ d ^ a) + LE_32((param+0x28)) + b - 0x41404390;
142 b = ((b << 0x17) | (b >> 0x09)) + c;
143 a = (b ^ c ^ d) + LE_32((param+0x34)) + a + 0x289B7EC6;
144 a = ((a << 0x04) | (a >> 0x1c)) + b;
145 d = (a ^ b ^ c) + LE_32((param+0x00)) + d - 0x155ED806;
146 d = ((d << 0x0b) | (d >> 0x15)) + a;
147 c = (d ^ a ^ b) + LE_32((param+0x0c)) + c - 0x2B10CF7B;
148 c = ((c << 0x10) | (c >> 0x10)) + d;
149 b = (c ^ d ^ a) + LE_32((param+0x18)) + b + 0x04881D05;
150 b = ((b << 0x17) | (b >> 0x09)) + c;
151 a = (b ^ c ^ d) + LE_32((param+0x24)) + a - 0x262B2FC7;
152 a = ((a << 0x04) | (a >> 0x1c)) + b;
153 d = (a ^ b ^ c) + LE_32((param+0x30)) + d - 0x1924661B;
154 d = ((d << 0x0b) | (d >> 0x15)) + a;
155 c = (d ^ a ^ b) + LE_32((param+0x3c)) + c + 0x1fa27cf8;
156 c = ((c << 0x10) | (c >> 0x10)) + d;
157 b = (c ^ d ^ a) + LE_32((param+0x08)) + b - 0x3B53A99B;
158 b = ((b << 0x17) | (b >> 0x09)) + c;
160 a = ((~d | b) ^ c) + LE_32((param+0x00)) + a - 0x0BD6DDBC;
161 a = ((a << 0x06) | (a >> 0x1a)) + b;
162 d = ((~c | a) ^ b) + LE_32((param+0x1c)) + d + 0x432AFF97;
163 d = ((d << 0x0a) | (d >> 0x16)) + a;
164 c = ((~b | d) ^ a) + LE_32((param+0x38)) + c - 0x546BDC59;
165 c = ((c << 0x0f) | (c >> 0x11)) + d;
166 b = ((~a | c) ^ d) + LE_32((param+0x14)) + b - 0x036C5FC7;
167 b = ((b << 0x15) | (b >> 0x0b)) + c;
168 a = ((~d | b) ^ c) + LE_32((param+0x30)) + a + 0x655B59C3;
169 a = ((a << 0x06) | (a >> 0x1a)) + b;
170 d = ((~c | a) ^ b) + LE_32((param+0x0C)) + d - 0x70F3336E;
171 d = ((d << 0x0a) | (d >> 0x16)) + a;
172 c = ((~b | d) ^ a) + LE_32((param+0x28)) + c - 0x00100B83;
173 c = ((c << 0x0f) | (c >> 0x11)) + d;
174 b = ((~a | c) ^ d) + LE_32((param+0x04)) + b - 0x7A7BA22F;
175 b = ((b << 0x15) | (b >> 0x0b)) + c;
176 a = ((~d | b) ^ c) + LE_32((param+0x20)) + a + 0x6FA87E4F;
177 a = ((a << 0x06) | (a >> 0x1a)) + b;
178 d = ((~c | a) ^ b) + LE_32((param+0x3c)) + d - 0x01D31920;
179 d = ((d << 0x0a) | (d >> 0x16)) + a;
180 c = ((~b | d) ^ a) + LE_32((param+0x18)) + c - 0x5CFEBCEC;
181 c = ((c << 0x0f) | (c >> 0x11)) + d;
182 b = ((~a | c) ^ d) + LE_32((param+0x34)) + b + 0x4E0811A1;
183 b = ((b << 0x15) | (b >> 0x0b)) + c;
184 a = ((~d | b) ^ c) + LE_32((param+0x10)) + a - 0x08AC817E;
185 a = ((a << 0x06) | (a >> 0x1a)) + b;
186 d = ((~c | a) ^ b) + LE_32((param+0x2c)) + d - 0x42C50DCB;
187 d = ((d << 0x0a) | (d >> 0x16)) + a;
188 c = ((~b | d) ^ a) + LE_32((param+0x08)) + c + 0x2AD7D2BB;
189 c = ((c << 0x0f) | (c >> 0x11)) + d;
190 b = ((~a | c) ^ d) + LE_32((param+0x24)) + b - 0x14792C6F;
191 b = ((b << 0x15) | (b >> 0x0b)) + c;
193 lprintf("hash output: %x %x %x %x\n", a, b, c, d);
198 d += LE_32(field+12);
206 static void call_hash (char *key, char *challenge, int len) {
208 uint8_t *ptr1, *ptr2;
209 uint32_t a, b, c, d, tmp;
211 ptr1=(uint8_t*)(key+16);
212 ptr2=(uint8_t*)(key+20);
219 if (a < (uint32_t)(len << 3))
221 lprintf("not verified: (len << 3) > a true\n");
225 tmp = LE_32(ptr2) + (len >> 0x1d);
229 if (a <= (uint32_t)len)
231 memcpy(key+b+24, challenge, a);
236 while ( d < (uint32_t)len ) {
237 lprintf("not verified: while ( d < len )\n");
238 hash(key, challenge+d-0x3f);
245 memcpy(key+b+24, challenge+c, len-c);
248 static void calc_response (char *result, char *field) {
253 memset (buf1, 0, 64);
256 memcpy (buf2, field+16, 8);
257 i = ( LE_32((buf2)) >> 3 ) & 0x3f;
264 lprintf("not verified: ! (i < 56)\n");
268 call_hash (field, buf1, i);
269 call_hash (field, buf2, 8);
270 memcpy (result, field, 16);
273 static void calc_response_string (char *result, char *challenge) {
278 /* initialize our field */
279 BE_32C (field, 0x01234567);
280 BE_32C ((field+4), 0x89ABCDEF);
281 BE_32C ((field+8), 0xFEDCBA98);
282 BE_32C ((field+12), 0x76543210);
283 BE_32C ((field+16), 0x00000000);
284 BE_32C ((field+20), 0x00000000);
286 /* calculate response */
287 call_hash(field, challenge, 64);
288 calc_response(zres,field);
290 /* convert zres to ascii string */
291 for (i=0; i<16; i++ ) {
294 a = (zres[i] >> 4) & 15;
297 result[i*2] = ((a<10) ? (a+48) : (a+87)) & 255;
298 result[i*2+1] = ((b<10) ? (b+48) : (b+87)) & 255;
302 void real_calc_response_and_checksum (char *response, char *chksum, char *challenge) {
304 int ch_len, table_len, resp_len;
309 /* initialize return values */
310 memset(response, 0, 64);
311 memset(chksum, 0, 34);
313 /* initialize buffer */
316 BE_32C(ptr, 0xa1e9149d);
318 BE_32C(ptr, 0x0e6b3b59);
321 /* some (length) checks */
322 if (challenge != NULL)
324 ch_len = strlen (challenge);
326 if (ch_len == 40) /* what a hack... */
331 if ( ch_len > 56 ) ch_len=56;
333 /* copy challenge to buf */
334 memcpy(ptr, challenge, ch_len);
337 if (xor_table != NULL)
339 table_len = strlen((char *)xor_table);
341 if (table_len > 56) table_len=56;
343 /* xor challenge bytewise with xor_table */
344 for (i=0; i<table_len; i++)
345 ptr[i] = ptr[i] ^ xor_table[i];
348 calc_response_string (response, buf);
351 resp_len = strlen (response);
352 strcpy (&response[resp_len], "01d0a8e3");
354 /* calculate checksum */
355 for (i=0; i<resp_len/4; i++)
356 chksum[i] = response[i*4];
361 * takes a MLTI-Chunk and a rule number got from match_asm_rule,
362 * returns a pointer to selected data and number of bytes in that.
364 static int select_mlti_data(const char *mlti_chunk, int mlti_size, int selection, char **out) {
366 int numrules, codec, size;
369 /* MLTI chunk should begin with MLTI */
370 if ((mlti_chunk[0] != 'M')
371 ||(mlti_chunk[1] != 'L')
372 ||(mlti_chunk[2] != 'T')
373 ||(mlti_chunk[3] != 'I'))
375 lprintf("MLTI tag not detected, copying data\n");
376 memcpy(*out, mlti_chunk, mlti_size);
382 /* next 16 bits are the number of rules */
383 numrules=BE_16(mlti_chunk);
384 if (selection >= numrules) return 0;
386 /* now <numrules> indices of codecs follows */
387 /* we skip to selection */
388 mlti_chunk+=(selection+1)*2;
391 codec=BE_16(mlti_chunk);
393 /* skip to number of codecs */
394 mlti_chunk+=(numrules-selection)*2;
396 /* get number of codecs */
397 numrules=BE_16(mlti_chunk);
399 if (codec >= numrules) {
400 lprintf("codec index >= number of codecs. %i %i\n", codec, numrules);
406 /* now seek to selected codec */
407 for (i=0; i<codec; i++) {
408 size=BE_32(mlti_chunk);
411 size=BE_32(mlti_chunk);
413 memcpy(*out, mlti_chunk+4, size);
418 * looking at stream description.
421 rmff_header_t *real_parse_sdp(char *data, char **stream_rules, uint32_t bandwidth) {
423 sdpplin_t *desc = NULL;
424 rmff_header_t *header = NULL;
429 int max_packet_size=0;
430 int avg_packet_size=0;
433 if( !data ) return NULL;
435 desc=sdpplin_parse(data);
436 if( !desc ) return NULL;
438 buf= (char *)malloc(sizeof(char)*2048);
439 if( !buf ) goto error;
441 header = (rmff_header_t*)malloc(sizeof(rmff_header_t));
442 if( !header ) goto error;
444 memset(header, 0, sizeof(rmff_header_t));
445 header->fileheader=rmff_new_fileheader(4+desc->stream_count);
446 header->cont=rmff_new_cont(
452 header->data=rmff_new_dataheader(0,0);
453 if( !header->data ) goto error;
455 header->streams = (rmff_mdpr_t**) malloc(sizeof(rmff_mdpr_t*)*(desc->stream_count+1));
456 if( !header->streams ) goto error;
458 memset(header->streams, 0, sizeof(rmff_mdpr_t*)*(desc->stream_count+1));
459 lprintf("number of streams: %u\n", desc->stream_count);
461 for (i=0; i<desc->stream_count; i++) {
468 lprintf("calling asmrp_match with:\n%s\n%u\n", desc->stream[i]->asm_rule_book, bandwidth);
470 n=asmrp_match(desc->stream[i]->asm_rule_book, bandwidth, rulematches);
471 for (j=0; j<n; j++) {
472 lprintf("asmrp rule match: %u for stream %u\n", rulematches[j], desc->stream[i]->stream_id);
473 sprintf(b,"stream=%u;rule=%u,", desc->stream[i]->stream_id, rulematches[j]);
474 strcat(*stream_rules, b);
477 if (!desc->stream[i]->mlti_data) {
479 if( buf ) free( buf );
482 len=select_mlti_data(desc->stream[i]->mlti_data,
483 desc->stream[i]->mlti_data_size, rulematches[0], &buf);
485 header->streams[i]=rmff_new_mdpr(
486 desc->stream[i]->stream_id,
487 desc->stream[i]->max_bit_rate,
488 desc->stream[i]->avg_bit_rate,
489 desc->stream[i]->max_packet_size,
490 desc->stream[i]->avg_packet_size,
491 desc->stream[i]->start_time,
492 desc->stream[i]->preroll,
493 desc->stream[i]->duration,
494 desc->stream[i]->stream_name,
495 desc->stream[i]->mime_type,
498 if( !header->streams[i] ) goto error;
500 duration=MAX(duration,desc->stream[i]->duration);
501 max_bit_rate+=desc->stream[i]->max_bit_rate;
502 avg_bit_rate+=desc->stream[i]->avg_bit_rate;
503 max_packet_size=MAX(max_packet_size, desc->stream[i]->max_packet_size);
505 avg_packet_size=(avg_packet_size + desc->stream[i]->avg_packet_size) / 2;
507 avg_packet_size=desc->stream[i]->avg_packet_size;
510 if (*stream_rules && strlen(*stream_rules) && (*stream_rules)[strlen(*stream_rules)-1] == ',')
511 (*stream_rules)[strlen(*stream_rules)-1]=0; /* delete last ',' in stream_rules */
513 header->prop=rmff_new_prop(
525 if( !header->prop ) goto error;
527 rmff_fix_header(header);
529 if( desc ) sdpplin_free( desc );
534 if( desc ) sdpplin_free( desc );
535 if( header ) rmff_free_header( header );
536 if( buf ) free( buf );
540 int real_get_rdt_chunk_header(rtsp_client_t *rtsp_session, rmff_pheader_t *ph) {
549 n=rtsp_read_data(rtsp_session, header, 8);
551 if (header[0] != 0x24) {
552 lprintf("rdt chunk not recognized: got 0x%02x\n", header[0]);
555 size=(header[1]<<16)+(header[2]<<8)+(header[3]);
557 if ((flags1!=0x40)&&(flags1!=0x42)) {
558 lprintf("got flags1: 0x%02x\n",flags1);
559 if (header[6]==0x06) {
560 lprintf("got end of stream packet\n");
566 n=rtsp_read_data(rtsp_session, header+3, 5);
568 lprintf("ignoring bytes:\n");
569 n=rtsp_read_data(rtsp_session, header+4, 4);
574 unknown1=(header[5]<<16)+(header[6]<<8)+(header[7]);
575 n=rtsp_read_data(rtsp_session, header, 6);
580 lprintf("ts: %u size: %u, flags: 0x%02x, unknown values: %u 0x%02x 0x%02x\n",
581 ts, size, flags1, unknown1, header[4], header[5]);
585 ph->object_version=0;
587 ph->stream_number=(flags1>>1)&1;
590 ph->flags=0; /* TODO: determine keyframe flag and insert here? */
594 int real_get_rdt_chunk(rtsp_client_t *rtsp_session, rmff_pheader_t *ph,
595 unsigned char **buffer) {
598 rmff_dump_pheader(ph, (char*)*buffer);
599 n=rtsp_read_data(rtsp_session, (uint8_t*)(*buffer + 12), ph->length - 12);
600 return (n <= 0) ? 0 : n+12;
603 //! maximum size of the rtsp description, must be < INT_MAX
604 #define MAX_DESC_BUF (20 * 1024 * 1024)
605 rmff_header_t *real_setup_and_get_header(rtsp_client_t *rtsp_session, int bandwidth) {
607 char *description=NULL;
608 char *session_id=NULL;
609 rmff_header_t *h=NULL;
610 char *challenge1 = NULL;
613 char *subscribe=NULL;
614 char *buf=(char*)malloc(sizeof(char)*256);
615 char *mrl=rtsp_get_mrl(rtsp_session);
620 challenge1=strdup(rtsp_search_answers(rtsp_session,"RealChallenge1"));
621 lprintf("Challenge1: %s\n", challenge1);
623 /* request stream description */
624 rtsp_schedule_field(rtsp_session, "Accept: application/sdp");
625 sprintf(buf, "Bandwidth: %u", bandwidth);
626 rtsp_schedule_field(rtsp_session, buf);
627 rtsp_schedule_field(rtsp_session, "GUID: 00000000-0000-0000-0000-000000000000");
628 rtsp_schedule_field(rtsp_session, "RegionData: 0");
629 rtsp_schedule_field(rtsp_session, "ClientID: Linux_2.4_6.0.9.1235_play32_RN01_EN_586");
630 rtsp_schedule_field(rtsp_session, "SupportsMaximumASMBandwidth: 1");
631 rtsp_schedule_field(rtsp_session, "Language: en-US");
632 rtsp_schedule_field(rtsp_session, "Require: com.real.retain-entity-for-setup");
634 status=rtsp_request_describe(rtsp_session,NULL);
635 if ( status<200 || status>299 ) {
636 char *alert=rtsp_search_answers(rtsp_session,"Alert");
638 lprintf("real: got message from server:\n%s\n", alert);
641 rtsp_send_ok(rtsp_session);
642 if( challenge1 ) free(challenge1);
643 if( alert ) free(alert);
648 /* receive description */
650 if (!rtsp_search_answers(rtsp_session,"Content-length"))
651 lprintf("real: got no Content-length!\n");
653 size=atoi(rtsp_search_answers(rtsp_session,"Content-length"));
655 if (size > MAX_DESC_BUF) {
656 printf("real: Content-length for description too big (> %uMB)!\n",
657 MAX_DESC_BUF/(1024*1024) );
661 if (!rtsp_search_answers(rtsp_session,"ETag"))
662 lprintf("real: got no ETag!\n");
664 session_id=strdup(rtsp_search_answers(rtsp_session,"ETag"));
666 lprintf("Stream description size: %i\n", size);
668 description = (char*)malloc(sizeof(char)*(size+1));
671 if( rtsp_read_data(rtsp_session, (uint8_t*)description, size) <= 0)
674 //fprintf(stderr, "%s", description);
676 /* parse sdp (sdpplin) and create a header and a subscribe string */
677 subscribe = (char *) malloc(sizeof(char)*256);
681 strcpy(subscribe, "Subscribe: ");
682 h=real_parse_sdp(description, &subscribe, bandwidth);
689 fprintf("Title: %s\nCopyright: %s\nAuthor: %s\nStreams: %i\n",
690 h->cont->title, h->cont->copyright, h->cont->author, h->prop->num_streams);
693 /* setup our streams */
694 real_calc_response_and_checksum (challenge2, checksum, challenge1);
695 buf = realloc(buf, strlen(challenge2) + strlen(checksum) + 32);
696 sprintf(buf, "RealChallenge2: %s, sd=%s", challenge2, checksum);
697 rtsp_schedule_field(rtsp_session, buf);
698 buf = realloc(buf, strlen(session_id) + 32);
699 sprintf(buf, "If-Match: %s", session_id);
700 rtsp_schedule_field(rtsp_session, buf);
701 rtsp_schedule_field(rtsp_session, "Transport: x-pn-tng/tcp;mode=play,rtp/avp/tcp;unicast;mode=play");
702 buf = realloc(buf, strlen(mrl) + 32);
703 sprintf(buf, "%s/streamid=0", mrl);
704 rtsp_request_setup(rtsp_session,buf);
706 if (h->prop->num_streams > 1) {
707 rtsp_schedule_field(rtsp_session, "Transport: x-pn-tng/tcp;mode=play,rtp/avp/tcp;unicast;mode=play");
708 buf = realloc(buf, strlen(session_id) + 32);
709 sprintf(buf, "If-Match: %s", session_id);
710 rtsp_schedule_field(rtsp_session, buf);
711 buf = realloc(buf, strlen(mrl) + 32);
712 sprintf(buf, "%s/streamid=1", mrl);
713 rtsp_request_setup(rtsp_session,buf);
715 /* set stream parameter (bandwidth) with our subscribe string */
716 rtsp_schedule_field(rtsp_session, subscribe);
717 rtsp_request_setparameter(rtsp_session,NULL);
719 /* and finally send a play request */
720 rtsp_schedule_field(rtsp_session, "Range: npt=0-");
721 rtsp_request_play(rtsp_session,NULL);
723 if( challenge1 ) free( challenge1 );
724 if( session_id ) free( session_id );
725 if( description ) free(description);
726 if( subscribe ) free(subscribe);
731 if( h ) rmff_free_header( h );
732 if( challenge1 ) free( challenge1 );
733 if( session_id ) free( session_id );
734 if( description ) free(description);
735 if( subscribe ) free(subscribe);