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mpv/stream/realrtsp/real.c

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/*
* This file was ported to MPlayer from xine CVS real.c,v 1.8 2003/03/30 17:11:50
*/
/*
* Copyright (C) 2002 the xine project
*
* This file is part of xine, a free video player.
*
* xine is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* xine is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
*
* special functions for real streams.
* adopted from joschkas real tools.
*
*/
#include <stdio.h>
#include <string.h>
#include "../config.h"
#include "libavutil/common.h"
#include "libavutil/bswap.h"
#include "real.h"
#include "asmrp.h"
#include "sdpplin.h"
#include "xbuffer.h"
#if USE_LIBAVUTIL_SO
#include "ffmpeg/md5.h"
#else
#include "libavutil/md5.h"
#endif
#include "../http.h"
#include "mp_msg.h"
/*
#define LOG
*/
static const unsigned char xor_table[] = {
0x05, 0x18, 0x74, 0xd0, 0x0d, 0x09, 0x02, 0x53,
0xc0, 0x01, 0x05, 0x05, 0x67, 0x03, 0x19, 0x70,
0x08, 0x27, 0x66, 0x10, 0x10, 0x72, 0x08, 0x09,
0x63, 0x11, 0x03, 0x71, 0x08, 0x08, 0x70, 0x02,
0x10, 0x57, 0x05, 0x18, 0x54, 0x00, 0x00, 0x00 };
#define BE_32C(x,y) (*((uint32_t*)(x))=be2me_32(y))
#define BE_16(x) be2me_16(*(uint16_t*)(x))
#define BE_32(x) be2me_32(*(uint32_t*)(x))
#ifndef MAX
#define MAX(x,y) ((x>y) ? x : y)
#endif
#define BUF_SIZE 4096
#ifdef LOG
static void hexdump (const char *buf, int length) {
int i;
printf (" hexdump> ");
for (i = 0; i < length; i++) {
unsigned char c = buf[i];
printf ("%02x", c);
if ((i % 16) == 15)
printf ("\n ");
if ((i % 2) == 1)
printf (" ");
}
printf ("\n");
}
#endif
static void calc_response_string (char *result, char *challenge) {
char zres[16];
int i;
av_md5_sum(zres, challenge, 64);
/* convert zres to ascii string */
for (i=0; i<16; i++ ) {
char a, b;
a = (zres[i] >> 4) & 15;
b = zres[i] & 15;
result[i*2] = ((a<10) ? (a+48) : (a+87)) & 255;
result[i*2+1] = ((b<10) ? (b+48) : (b+87)) & 255;
}
}
static void real_calc_response_and_checksum (char *response, char *chksum, char *challenge) {
int ch_len, table_len, resp_len;
int i;
char *ptr;
char buf[128];
/* initialize return values */
memset(response, 0, 64);
memset(chksum, 0, 34);
/* initialize buffer */
memset(buf, 0, 128);
ptr=buf;
BE_32C(ptr, 0xa1e9149d);
ptr+=4;
BE_32C(ptr, 0x0e6b3b59);
ptr+=4;
/* some (length) checks */
if (challenge != NULL)
{
ch_len = strlen (challenge);
if (ch_len == 40) /* what a hack... */
{
challenge[32]=0;
ch_len=32;
}
if ( ch_len > 56 ) ch_len=56;
/* copy challenge to buf */
memcpy(ptr, challenge, ch_len);
}
table_len = strlen(xor_table);
if (table_len > 56) table_len=56;
/* xor challenge bytewise with xor_table */
for (i=0; i<table_len; i++)
ptr[i] = ptr[i] ^ xor_table[i];
calc_response_string (response, buf);
/* add tail */
resp_len = strlen (response);
strcpy (&response[resp_len], "01d0a8e3");
/* calculate checksum */
for (i=0; i<resp_len/4; i++)
chksum[i] = response[i*4];
}
/*
* takes a MLTI-Chunk and a rule number got from match_asm_rule,
* returns a pointer to selected data and number of bytes in that.
*/
static int select_mlti_data(const char *mlti_chunk, int mlti_size, int selection, char **out) {
int numrules, codec, size;
int i;
/* MLTI chunk should begin with MLTI */
if ((mlti_chunk[0] != 'M')
||(mlti_chunk[1] != 'L')
||(mlti_chunk[2] != 'T')
||(mlti_chunk[3] != 'I'))
{
#ifdef LOG
printf("libreal: MLTI tag not detected, copying data\n");
#endif
*out = xbuffer_copyin(*out, 0, mlti_chunk, mlti_size);
return mlti_size;
}
mlti_chunk+=4;
/* next 16 bits are the number of rules */
numrules=BE_16(mlti_chunk);
if (selection >= numrules) return 0;
/* now <numrules> indices of codecs follows */
/* we skip to selection */
mlti_chunk+=(selection+1)*2;
/* get our index */
codec=BE_16(mlti_chunk);
/* skip to number of codecs */
mlti_chunk+=(numrules-selection)*2;
/* get number of codecs */
numrules=BE_16(mlti_chunk);
if (codec >= numrules) {
mp_msg(MSGT_STREAM, MSGL_WARN, "realrtsp: codec index >= number of codecs. %i %i\n",
codec, numrules);
return 0;
}
mlti_chunk+=2;
/* now seek to selected codec */
for (i=0; i<codec; i++) {
size=BE_32(mlti_chunk);
mlti_chunk+=size+4;
}
size=BE_32(mlti_chunk);
#ifdef LOG
hexdump(mlti_chunk+4, size);
#endif
*out = xbuffer_copyin(*out, 0, mlti_chunk+4, size);
return size;
}
/*
* looking at stream description.
*/
static rmff_header_t *real_parse_sdp(char *data, char **stream_rules, uint32_t bandwidth) {
sdpplin_t *desc;
rmff_header_t *header;
char *buf;
int len, i;
int max_bit_rate=0;
int avg_bit_rate=0;
int max_packet_size=0;
int avg_packet_size=0;
int duration=0;
if (!data) return NULL;
desc=sdpplin_parse(data);
if (!desc) return NULL;
buf = xbuffer_init(2048);
header=calloc(1,sizeof(rmff_header_t));
header->fileheader=rmff_new_fileheader(4+desc->stream_count);
header->cont=rmff_new_cont(
desc->title,
desc->author,
desc->copyright,
desc->abstract);
header->data=rmff_new_dataheader(0,0);
header->streams=calloc(1,sizeof(rmff_mdpr_t*)*(desc->stream_count+1));
#ifdef LOG
printf("number of streams: %u\n", desc->stream_count);
#endif
for (i=0; i<desc->stream_count; i++) {
int j=0;
int n;
char b[64];
int rulematches[16];
#ifdef LOG
printf("calling asmrp_match with:\n%s\n%u\n", desc->stream[i]->asm_rule_book, bandwidth);
#endif
n=asmrp_match(desc->stream[i]->asm_rule_book, bandwidth, rulematches);
for (j=0; j<n; j++) {
#ifdef LOG
printf("asmrp rule match: %u for stream %u\n", rulematches[j], desc->stream[i]->stream_id);
#endif
sprintf(b,"stream=%u;rule=%u,", desc->stream[i]->stream_id, rulematches[j]);
*stream_rules = xbuffer_strcat(*stream_rules, b);
}
if (!desc->stream[i]->mlti_data) {
len = 0;
buf = NULL;
} else
len=select_mlti_data(desc->stream[i]->mlti_data, desc->stream[i]->mlti_data_size, rulematches[0], &buf);
header->streams[i]=rmff_new_mdpr(
desc->stream[i]->stream_id,
desc->stream[i]->max_bit_rate,
desc->stream[i]->avg_bit_rate,
desc->stream[i]->max_packet_size,
desc->stream[i]->avg_packet_size,
desc->stream[i]->start_time,
desc->stream[i]->preroll,
desc->stream[i]->duration,
desc->stream[i]->stream_name,
desc->stream[i]->mime_type,
len,
buf);
duration=MAX(duration,desc->stream[i]->duration);
max_bit_rate+=desc->stream[i]->max_bit_rate;
avg_bit_rate+=desc->stream[i]->avg_bit_rate;
max_packet_size=MAX(max_packet_size, desc->stream[i]->max_packet_size);
if (avg_packet_size)
avg_packet_size=(avg_packet_size + desc->stream[i]->avg_packet_size) / 2;
else
avg_packet_size=desc->stream[i]->avg_packet_size;
}
if (*stream_rules && strlen(*stream_rules) && (*stream_rules)[strlen(*stream_rules)-1] == ',')
(*stream_rules)[strlen(*stream_rules)-1]=0; /* delete last ',' in stream_rules */
header->prop=rmff_new_prop(
max_bit_rate,
avg_bit_rate,
max_packet_size,
avg_packet_size,
0,
duration,
0,
0,
0,
desc->stream_count,
desc->flags);
rmff_fix_header(header);
buf = xbuffer_free(buf);
return header;
}
int real_get_rdt_chunk(rtsp_t *rtsp_session, char **buffer) {
int n=1;
uint8_t header[8];
rmff_pheader_t ph;
int size;
int flags1, flags2;
int unknown1;
uint32_t ts;
static uint32_t prev_ts = -1;
static int prev_stream_number = -1;
n=rtsp_read_data(rtsp_session, header, 8);
if (n<8) return 0;
if (header[0] != 0x24)
{
mp_msg(MSGT_STREAM, MSGL_WARN, "realrtsp: rdt chunk not recognized: got 0x%02x\n",
header[0]);
return 0;
}
size=(header[1]<<16)+(header[2]<<8)+(header[3]);
flags1=header[4];
if ((flags1!=0x40)&&(flags1!=0x42))
{
#ifdef LOG
printf("got flags1: 0x%02x\n",flags1);
#endif
if(header[6] == 0x06) {
mp_msg(MSGT_STREAM, MSGL_INFO, "realrtsp: Stream EOF detected\n");
return -1;
}
header[0]=header[5];
header[1]=header[6];
header[2]=header[7];
n=rtsp_read_data(rtsp_session, header+3, 5);
if (n<5) return 0;
#ifdef LOG
printf("ignoring bytes:\n");
hexdump(header, 8);
#endif
n=rtsp_read_data(rtsp_session, header+4, 4);
if (n<4) return 0;
flags1=header[4];
size-=9;
}
flags2=header[7];
// header[5..6] == frame number in stream
unknown1=(header[5]<<16)+(header[6]<<8)+(header[7]);
n=rtsp_read_data(rtsp_session, header, 6);
if (n<6) return 0;
ts=BE_32(header);
#ifdef LOG
printf("ts: %u, size: %u, flags: 0x%02x, unknown values: 0x%06x 0x%02x 0x%02x\n",
ts, size, flags1, unknown1, header[4], header[5]);
#endif
size+=2;
ph.object_version=0;
ph.length=size;
ph.stream_number=(flags1>>1)&1;
ph.timestamp=ts;
ph.reserved=0;
if ((flags2&1) == 0 && (prev_ts != ts || prev_stream_number != ph.stream_number))
{
prev_ts = ts;
prev_stream_number = ph.stream_number;
ph.flags=2;
}
else
ph.flags=0;
*buffer = xbuffer_ensure_size(*buffer, 12+size);
rmff_dump_pheader(&ph, *buffer);
size-=12;
n=rtsp_read_data(rtsp_session, (*buffer)+12, size);
return (n <= 0) ? 0 : n+12;
}
static int convert_timestamp(char *str, int *sec, int *msec) {
int hh, mm, ss, ms = 0;
if (sscanf(str, "%d:%d:%d.%d", &hh, &mm, &ss, &ms) < 3) {
hh = 0;
if (sscanf(str, "%d:%d.%d", &mm, &ss, &ms) < 2) {
mm = 0;
if (sscanf(str, "%d.%d", &ss, &ms) < 1) {
ss = 0;
ms = 0;
}
}
}
if (sec)
*sec = hh * 3600 + mm * 60 + ss;
if (msec)
*msec = ms;
return 1;
}
//! maximum size of the rtsp description, must be < INT_MAX
#define MAX_DESC_BUF (20 * 1024 * 1024)
rmff_header_t *real_setup_and_get_header(rtsp_t *rtsp_session, uint32_t bandwidth,
char *username, char *password) {
char *description=NULL;
char *session_id=NULL;
rmff_header_t *h;
char *challenge1;
char challenge2[64];
char checksum[34];
char *subscribe;
char *buf = xbuffer_init(256);
char *mrl=rtsp_get_mrl(rtsp_session);
unsigned int size;
int status;
uint32_t maxbandwidth = bandwidth;
char* authfield = NULL;
/* get challenge */
challenge1=strdup(rtsp_search_answers(rtsp_session,"RealChallenge1"));
#ifdef LOG
printf("real: Challenge1: %s\n", challenge1);
#endif
/* set a reasonable default to get the best stream, unless bandwidth given */
if (!bandwidth)
bandwidth = 10485800;
/* request stream description */
rtsp_send_describe:
rtsp_schedule_field(rtsp_session, "Accept: application/sdp");
sprintf(buf, "Bandwidth: %u", bandwidth);
rtsp_schedule_field(rtsp_session, buf);
rtsp_schedule_field(rtsp_session, "GUID: 00000000-0000-0000-0000-000000000000");
rtsp_schedule_field(rtsp_session, "RegionData: 0");
rtsp_schedule_field(rtsp_session, "ClientID: Linux_2.4_6.0.9.1235_play32_RN01_EN_586");
rtsp_schedule_field(rtsp_session, "SupportsMaximumASMBandwidth: 1");
rtsp_schedule_field(rtsp_session, "Language: en-US");
rtsp_schedule_field(rtsp_session, "Require: com.real.retain-entity-for-setup");
if(authfield)
rtsp_schedule_field(rtsp_session, authfield);
status=rtsp_request_describe(rtsp_session,NULL);
if (status == 401) {
int authlen, b64_authlen;
char *authreq;
char* authstr = NULL;
if (authfield) {
mp_msg(MSGT_STREAM, MSGL_ERR, "realrtsp: authorization failed, check your credentials\n");
goto autherr;
}
if (!(authreq = rtsp_search_answers(rtsp_session,"WWW-Authenticate"))) {
mp_msg(MSGT_STREAM, MSGL_ERR, "realrtsp: 401 but no auth request, aborting\n");
goto autherr;
}
if (!username) {
mp_msg(MSGT_STREAM, MSGL_ERR, "realrtsp: auth required but no username supplied\n");
goto autherr;
}
if (!strstr(authreq, "Basic")) {
mp_msg(MSGT_STREAM, MSGL_ERR, "realrtsp: authenticator not supported (%s)\n", authreq);
goto autherr;
}
authlen = strlen(username) + (password ? strlen(password) : 0) + 2;
authstr = malloc(authlen);
sprintf(authstr, "%s:%s", username, password ? password : "");
authfield = malloc(authlen*2+22);
strcpy(authfield, "Authorization: Basic ");
b64_authlen = base64_encode(authstr, authlen, authfield+21, authlen*2);
free(authstr);
if (b64_authlen < 0) {
mp_msg(MSGT_STREAM, MSGL_ERR, "realrtsp: base64 output overflow, this should never happen\n");
goto autherr;
}
authfield[b64_authlen+21] = 0;
goto rtsp_send_describe;
}
autherr:
if (authfield)
free(authfield);
if ( status<200 || status>299 )
{
char *alert=rtsp_search_answers(rtsp_session,"Alert");
if (alert) {
mp_msg(MSGT_STREAM, MSGL_WARN, "realrtsp: got message from server:\n%s\n",
alert);
}
rtsp_send_ok(rtsp_session);
buf = xbuffer_free(buf);
return NULL;
}
/* receive description */
size=0;
if (!rtsp_search_answers(rtsp_session,"Content-length"))
mp_msg(MSGT_STREAM, MSGL_WARN, "real: got no Content-length!\n");
else
size=atoi(rtsp_search_answers(rtsp_session,"Content-length"));
// as size is unsigned this also catches the case (size < 0)
if (size > MAX_DESC_BUF) {
mp_msg(MSGT_STREAM, MSGL_ERR, "realrtsp: Content-length for description too big (> %uMB)!\n",
MAX_DESC_BUF/(1024*1024) );
xbuffer_free(buf);
return NULL;
}
if (!rtsp_search_answers(rtsp_session,"ETag"))
mp_msg(MSGT_STREAM, MSGL_WARN, "realrtsp: got no ETag!\n");
else
session_id=strdup(rtsp_search_answers(rtsp_session,"ETag"));
#ifdef LOG
printf("real: Stream description size: %u\n", size);
#endif
description=malloc(size+1);
if( rtsp_read_data(rtsp_session, description, size) <= 0) {
buf = xbuffer_free(buf);
return NULL;
}
description[size]=0;
/* parse sdp (sdpplin) and create a header and a subscribe string */
subscribe = xbuffer_init(256);
strcpy(subscribe, "Subscribe: ");
h=real_parse_sdp(description, &subscribe, bandwidth);
if (!h) {
subscribe = xbuffer_free(subscribe);
buf = xbuffer_free(buf);
return NULL;
}
rmff_fix_header(h);
#ifdef LOG
printf("Title: %s\nCopyright: %s\nAuthor: %s\nStreams: %i\n",
h->cont->title, h->cont->copyright, h->cont->author, h->prop->num_streams);
#endif
/* setup our streams */
real_calc_response_and_checksum (challenge2, checksum, challenge1);
buf = xbuffer_ensure_size(buf, strlen(challenge2) + strlen(checksum) + 32);
sprintf(buf, "RealChallenge2: %s, sd=%s", challenge2, checksum);
rtsp_schedule_field(rtsp_session, buf);
buf = xbuffer_ensure_size(buf, strlen(session_id) + 32);
sprintf(buf, "If-Match: %s", session_id);
rtsp_schedule_field(rtsp_session, buf);
rtsp_schedule_field(rtsp_session, "Transport: x-pn-tng/tcp;mode=play,rtp/avp/tcp;unicast;mode=play");
buf = xbuffer_ensure_size(buf, strlen(mrl) + 32);
sprintf(buf, "%s/streamid=0", mrl);
rtsp_request_setup(rtsp_session,buf,NULL);
if (h->prop->num_streams > 1) {
rtsp_schedule_field(rtsp_session, "Transport: x-pn-tng/tcp;mode=play,rtp/avp/tcp;unicast;mode=play");
buf = xbuffer_ensure_size(buf, strlen(session_id) + 32);
sprintf(buf, "If-Match: %s", session_id);
rtsp_schedule_field(rtsp_session, buf);
buf = xbuffer_ensure_size(buf, strlen(mrl) + 32);
sprintf(buf, "%s/streamid=1", mrl);
rtsp_request_setup(rtsp_session,buf,NULL);
}
/* set stream parameter (bandwidth) with our subscribe string */
rtsp_schedule_field(rtsp_session, subscribe);
rtsp_request_setparameter(rtsp_session,NULL);
/* set delivery bandwidth */
if (maxbandwidth) {
sprintf(buf, "SetDeliveryBandwidth: Bandwidth=%u;BackOff=0", maxbandwidth);
rtsp_schedule_field(rtsp_session, buf);
rtsp_request_setparameter(rtsp_session,NULL);
}
{
int s_ss = 0, s_ms = 0, e_ss = 0, e_ms = 0;
char *str;
if ((str = rtsp_get_param(rtsp_session, "start"))) {
convert_timestamp(str, &s_ss, &s_ms);
free(str);
}
if ((str = rtsp_get_param(rtsp_session, "end"))) {
convert_timestamp(str, &e_ss, &e_ms);
free(str);
}
str = buf + sprintf(buf, s_ms ? "%s%d.%d-" : "%s%d-", "Range: npt=", s_ss, s_ms);
if (e_ss || e_ms)
sprintf(str, e_ms ? "%d.%d" : "%d", e_ss, e_ms);
}
rtsp_schedule_field(rtsp_session, buf);
/* and finally send a play request */
rtsp_request_play(rtsp_session,NULL);
subscribe = xbuffer_free(subscribe);
buf = xbuffer_free(buf);
return h;
}
struct real_rtsp_session_t *
init_real_rtsp_session (void)
{
struct real_rtsp_session_t *real_rtsp_session = NULL;
real_rtsp_session = malloc (sizeof (struct real_rtsp_session_t));
real_rtsp_session->recv = xbuffer_init (BUF_SIZE);
return real_rtsp_session;
}
void
free_real_rtsp_session (struct real_rtsp_session_t* real_session)
{
if (!real_session)
return;
xbuffer_free (real_session->recv);
free (real_session);
}
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