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mpv/libmpdemux/realrtsp/rtsp.c

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/*
* This file was ported to MPlayer from xine CVS rtsp.c,v 1.9 2003/04/10 02:30:48
*/
/*
* Copyright (C) 2000-2002 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
*
*
* a minimalistic implementation of rtsp protocol,
* *not* RFC 2326 compilant yet.
*/
#include <unistd.h>
#include <stdio.h>
#include <assert.h>
#include "config.h"
#ifndef HAVE_WINSOCK2
#define closesocket close
#include <sys/socket.h>
#include <netinet/in.h>
#include <netdb.h>
#else
#include <winsock2.h>
#endif
#include <string.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <stdlib.h>
#include <time.h>
#include <sys/time.h>
#include <sys/types.h>
#include <inttypes.h>
#include "rtsp.h"
#include "../stream.h"
#include "../demuxer.h"
#include "rtsp_session.h"
#include "osdep/timer.h"
/*
#define LOG
*/
#define BUF_SIZE 4096
#define HEADER_SIZE 1024
#define MAX_FIELDS 256
extern int network_bandwidth;
struct rtsp_s {
int s;
char *host;
int port;
char *path;
char *param;
char *mrl;
char *user_agent;
char *server;
unsigned int server_state;
uint32_t server_caps;
unsigned int cseq;
char *session;
char *answers[MAX_FIELDS]; /* data of last message */
char *scheduled[MAX_FIELDS]; /* will be sent with next message */
};
/*
* constants
*/
const char rtsp_protocol_version[]="RTSP/1.0";
/* server states */
#define RTSP_CONNECTED 1
#define RTSP_INIT 2
#define RTSP_READY 4
#define RTSP_PLAYING 8
#define RTSP_RECORDING 16
/* server capabilities */
#define RTSP_OPTIONS 0x001
#define RTSP_DESCRIBE 0x002
#define RTSP_ANNOUNCE 0x004
#define RTSP_SETUP 0x008
#define RTSP_GET_PARAMETER 0x010
#define RTSP_SET_PARAMETER 0x020
#define RTSP_TEARDOWN 0x040
#define RTSP_PLAY 0x080
#define RTSP_RECORD 0x100
/*
* network utilities
*/
static int host_connect_attempt(struct in_addr ia, int port) {
int s;
struct sockaddr_in sin;
s = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP);
if (s == -1) {
mp_msg(MSGT_OPEN, MSGL_ERR, "rtsp: socket(): %s\n", strerror(errno));
return -1;
}
sin.sin_family = AF_INET;
sin.sin_addr = ia;
sin.sin_port = htons(port);
if (connect(s, (struct sockaddr *)&sin, sizeof(sin))==-1
#ifndef HAVE_WINSOCK2
&& errno != EINPROGRESS) {
#else
&& WSAGetLastError() == WSAEINPROGRESS) {
#endif
mp_msg(MSGT_OPEN, MSGL_ERR, "rtsp: connect(): %s\n", strerror(errno));
closesocket(s);
return -1;
}
return s;
}
static int host_connect(const char *host, int port) {
struct hostent *h;
int i, s;
h = gethostbyname(host);
if (h == NULL) {
mp_msg(MSGT_OPEN, MSGL_ERR, "rtsp: unable to resolve '%s'.\n", host);
return -1;
}
for (i = 0; h->h_addr_list[i]; i++) {
struct in_addr ia;
memcpy (&ia, h->h_addr_list[i], 4);
s = host_connect_attempt(ia, port);
if(s != -1)
return s;
}
mp_msg(MSGT_OPEN, MSGL_ERR, "rtsp: unable to connect to '%s'.\n", host);
return -1;
}
static int write_stream(int s, const char *buf, int len) {
int total, timeout;
total = 0; timeout = 30;
while (total < len){
int n;
n = send (s, &buf[total], len - total, 0);
if (n > 0)
total += n;
else if (n < 0) {
#ifndef HAVE_WINSOCK2
if ((timeout>0) && ((errno == EAGAIN) || (errno == EINPROGRESS))) {
#else
if ((timeout>0) && ((errno == EAGAIN) || (WSAGetLastError() == WSAEINPROGRESS))) {
#endif
usec_sleep (1000000); timeout--;
} else
return -1;
}
}
return total;
}
static ssize_t read_stream(int fd, void *buf, size_t count) {
ssize_t ret, total;
total = 0;
while (total < count) {
ret=recv (fd, ((uint8_t*)buf)+total, count-total, 0);
if (ret<0) {
if(errno == EAGAIN) {
fd_set rset;
struct timeval timeout;
FD_ZERO (&rset);
FD_SET (fd, &rset);
timeout.tv_sec = 30;
timeout.tv_usec = 0;
if (select (fd+1, &rset, NULL, NULL, &timeout) <= 0) {
return -1;
}
continue;
}
mp_msg(MSGT_OPEN, MSGL_ERR, "rtsp: read error.\n");
return ret;
} else
total += ret;
/* end of stream */
if (!ret) break;
}
return total;
}
/*
* debugging utilities
*/
#if 0
static void hexdump (char *buf, int length) {
int i;
mp_msg(MSGT_OPEN, MSGL_INFO, "rtsp: ascii>");
for (i = 0; i < length; i++) {
unsigned char c = buf[i];
if ((c >= 32) && (c <= 128))
mp_msg(MSGT_OPEN, MSGL_INFO, "%c", c);
else
mp_msg(MSGT_OPEN, MSGL_INFO, ".");
}
mp_msg(MSGT_OPEN, MSGL_INFO, "\n");
mp_msg(MSGT_OPEN, MSGL_INFO, "rtsp: hexdump> ");
for (i = 0; i < length; i++) {
unsigned char c = buf[i];
mp_msg(MSGT_OPEN, MSGL_INFO, "%02x", c);
if ((i % 16) == 15)
mp_msg(MSGT_OPEN, MSGL_INFO, "\nrtsp: ");
if ((i % 2) == 1)
mp_msg(MSGT_OPEN, MSGL_INFO, " ");
}
mp_msg(MSGT_OPEN, MSGL_INFO, "\n");
}
#endif
/*
* rtsp_get gets a line from stream
* and returns a null terminated string.
*/
static char *rtsp_get(rtsp_t *s) {
int n=1;
char *buffer = malloc(BUF_SIZE);
char *string = NULL;
read_stream(s->s, buffer, 1);
while (n<BUF_SIZE) {
read_stream(s->s, &(buffer[n]), 1);
if ((buffer[n-1]==0x0d)&&(buffer[n]==0x0a)) break;
n++;
}
if (n>=BUF_SIZE) {
mp_msg(MSGT_OPEN, MSGL_FATAL, "librtsp: buffer overflow in rtsp_get\n");
exit(1);
}
string=malloc(sizeof(char)*n);
memcpy(string,buffer,n-1);
string[n-1]=0;
#ifdef LOG
mp_msg(MSGT_OPEN, MSGL_INFO, "librtsp: << '%s'\n", string);
#endif
free(buffer);
return string;
}
/*
* rtsp_put puts a line on stream
*/
static void rtsp_put(rtsp_t *s, const char *string) {
int len=strlen(string);
char *buf=malloc(sizeof(char)*len+2);
#ifdef LOG
mp_msg(MSGT_OPEN, MSGL_INFO, "librtsp: >> '%s'", string);
#endif
memcpy(buf,string,len);
buf[len]=0x0d;
buf[len+1]=0x0a;
write_stream(s->s, buf, len+2);
#ifdef LOG
mp_msg(MSGT_OPEN, MSGL_INFO, " done.\n");
#endif
free(buf);
}
/*
* extract server status code
*/
static int rtsp_get_code(const char *string) {
char buf[4];
int code=0;
if (!strncmp(string, rtsp_protocol_version, strlen(rtsp_protocol_version)))
{
memcpy(buf, string+strlen(rtsp_protocol_version)+1, 3);
buf[3]=0;
code=atoi(buf);
} else if (!strncmp(string, "SET_PARAMETER",8))
{
return RTSP_STATUS_SET_PARAMETER;
}
if(code != 200) mp_msg(MSGT_OPEN, MSGL_INFO, "librtsp: server responds: '%s'\n",string);
return code;
}
/*
* send a request
*/
static void rtsp_send_request(rtsp_t *s, const char *type, const char *what) {
char **payload=s->scheduled;
char *buf;
buf = malloc(strlen(type)+strlen(what)+strlen(rtsp_protocol_version)+3);
sprintf(buf,"%s %s %s",type, what, rtsp_protocol_version);
rtsp_put(s,buf);
free(buf);
if (payload)
while (*payload) {
rtsp_put(s,*payload);
payload++;
}
rtsp_put(s,"");
rtsp_unschedule_all(s);
}
/*
* schedule standard fields
*/
static void rtsp_schedule_standard(rtsp_t *s) {
char tmp[16];
snprintf(tmp, 16, "Cseq: %u", s->cseq);
rtsp_schedule_field(s, tmp);
if (s->session) {
char *buf;
buf = malloc(strlen(s->session)+15);
sprintf(buf, "Session: %s", s->session);
rtsp_schedule_field(s, buf);
free(buf);
}
}
/*
* get the answers, if server responses with something != 200, return NULL
*/
static int rtsp_get_answers(rtsp_t *s) {
char *answer=NULL;
unsigned int answer_seq;
char **answer_ptr=s->answers;
int code;
int ans_count = 0;
answer=rtsp_get(s);
if (!answer)
return 0;
code=rtsp_get_code(answer);
free(answer);
rtsp_free_answers(s);
do { /* while we get answer lines */
answer=rtsp_get(s);
if (!answer)
return 0;
if (!strncmp(answer,"Cseq:",5)) {
sscanf(answer,"Cseq: %u",&answer_seq);
if (s->cseq != answer_seq) {
#ifdef LOG
mp_msg(MSGT_OPEN, MSGL_WARN, "librtsp: warning: Cseq mismatch. got %u, assumed %u", answer_seq, s->cseq);
#endif
s->cseq=answer_seq;
}
}
if (!strncmp(answer,"Server:",7)) {
char *buf = malloc(strlen(answer));
sscanf(answer,"Server: %s",buf);
if (s->server) free(s->server);
s->server=strdup(buf);
free(buf);
}
if (!strncmp(answer,"Session:",8)) {
char *buf = calloc(1, strlen(answer));
sscanf(answer,"Session: %s",buf);
if (s->session) {
if (strcmp(buf, s->session)) {
mp_msg(MSGT_OPEN, MSGL_WARN, "rtsp: warning: setting NEW session: %s\n", buf);
free(s->session);
s->session=strdup(buf);
}
} else
{
#ifdef LOG
mp_msg(MSGT_OPEN, MSGL_INFO, "rtsp: setting session id to: %s\n", buf);
#endif
s->session=strdup(buf);
}
free(buf);
}
*answer_ptr=answer;
answer_ptr++;
} while ((strlen(answer)!=0) && (++ans_count < MAX_FIELDS));
s->cseq++;
*answer_ptr=NULL;
rtsp_schedule_standard(s);
return code;
}
/*
* send an ok message
*/
int rtsp_send_ok(rtsp_t *s) {
char cseq[16];
rtsp_put(s, "RTSP/1.0 200 OK");
sprintf(cseq,"CSeq: %u", s->cseq);
rtsp_put(s, cseq);
rtsp_put(s, "");
return 0;
}
/*
* implementation of must-have rtsp requests; functions return
* server status code.
*/
int rtsp_request_options(rtsp_t *s, const char *what) {
char *buf;
if (what) {
buf=strdup(what);
} else
{
buf=malloc(sizeof(char)*(strlen(s->host)+16));
sprintf(buf,"rtsp://%s:%i", s->host, s->port);
}
rtsp_send_request(s,"OPTIONS",buf);
free(buf);
return rtsp_get_answers(s);
}
int rtsp_request_describe(rtsp_t *s, const char *what) {
char *buf;
if (what) {
buf=strdup(what);
} else
{
buf=malloc(sizeof(char)*(strlen(s->host)+strlen(s->path)+16));
sprintf(buf,"rtsp://%s:%i/%s", s->host, s->port, s->path);
}
rtsp_send_request(s,"DESCRIBE",buf);
free(buf);
return rtsp_get_answers(s);
}
int rtsp_request_setup(rtsp_t *s, const char *what) {
rtsp_send_request(s,"SETUP",what);
return rtsp_get_answers(s);
}
int rtsp_request_setparameter(rtsp_t *s, const char *what) {
char *buf;
if (what) {
buf=strdup(what);
} else
{
buf=malloc(sizeof(char)*(strlen(s->host)+strlen(s->path)+16));
sprintf(buf,"rtsp://%s:%i/%s", s->host, s->port, s->path);
}
rtsp_send_request(s,"SET_PARAMETER",buf);
free(buf);
return rtsp_get_answers(s);
}
int rtsp_request_play(rtsp_t *s, const char *what) {
char *buf;
if (what) {
buf=strdup(what);
} else
{
buf=malloc(sizeof(char)*(strlen(s->host)+strlen(s->path)+16));
sprintf(buf,"rtsp://%s:%i/%s", s->host, s->port, s->path);
}
rtsp_send_request(s,"PLAY",buf);
free(buf);
return rtsp_get_answers(s);
}
int rtsp_request_tearoff(rtsp_t *s, const char *what) {
rtsp_send_request(s,"TEAROFF",what);
return rtsp_get_answers(s);
}
/*
* read opaque data from stream
*/
int rtsp_read_data(rtsp_t *s, char *buffer, unsigned int size) {
int i,seq;
if (size>=4) {
i=read_stream(s->s, buffer, 4);
if (i<4) return i;
if (((buffer[0]=='S')&&(buffer[1]=='E')&&(buffer[2]=='T')&&(buffer[3]=='_')) ||
((buffer[0]=='O')&&(buffer[1]=='P')&&(buffer[2]=='T')&&(buffer[3]=='I'))) // OPTIONS
{
char *rest=rtsp_get(s);
if (!rest)
return -1;
seq=-1;
do {
free(rest);
rest=rtsp_get(s);
if (!rest)
return -1;
if (!strncmp(rest,"Cseq:",5))
sscanf(rest,"Cseq: %u",&seq);
} while (strlen(rest)!=0);
free(rest);
if (seq<0) {
#ifdef LOG
mp_msg(MSGT_OPEN, MSGL_WARN, "rtsp: warning: cseq not recognized!\n");
#endif
seq=1;
}
/* let's make the server happy */
rtsp_put(s, "RTSP/1.0 451 Parameter Not Understood");
rest=malloc(sizeof(char)*16);
sprintf(rest,"CSeq: %u", seq);
rtsp_put(s, rest);
rtsp_put(s, "");
i=read_stream(s->s, buffer, size);
} else
{
i=read_stream(s->s, buffer+4, size-4);
i+=4;
}
} else
i=read_stream(s->s, buffer, size);
#ifdef LOG
mp_msg(MSGT_OPEN, MSGL_INFO, "librtsp: << %d of %d bytes\n", i, size);
#endif
return i;
}
/*
* connect to a rtsp server
*/
//rtsp_t *rtsp_connect(const char *mrl, const char *user_agent) {
rtsp_t *rtsp_connect(int fd, char* mrl, char *path, char *host, int port, char *user_agent) {
rtsp_t *s=malloc(sizeof(rtsp_t));
int i;
for (i=0; i<MAX_FIELDS; i++) {
s->answers[i]=NULL;
s->scheduled[i]=NULL;
}
s->server=NULL;
s->server_state=0;
s->server_caps=0;
s->cseq=1;
s->session=NULL;
if (user_agent)
s->user_agent=strdup(user_agent);
else
s->user_agent=strdup("User-Agent: RealMedia Player Version 6.0.9.1235 (linux-2.0-libc6-i386-gcc2.95)");
s->mrl = strdup(mrl);
s->host = strdup(host);
s->port = port;
s->path = strdup(path);
while (*path == '/')
path++;
if ((s->param = strchr(s->path, '?')) != NULL)
s->param++;
//mp_msg(MSGT_OPEN, MSGL_INFO, "path=%s\n", s->path);
//mp_msg(MSGT_OPEN, MSGL_INFO, "param=%s\n", s->param ? s->param : "NULL");
s->s = fd;
if (s->s < 0) {
mp_msg(MSGT_OPEN, MSGL_ERR, "rtsp: failed to connect to '%s'\n", s->host);
rtsp_close(s);
return NULL;
}
s->server_state=RTSP_CONNECTED;
/* now let's send an options request. */
rtsp_schedule_field(s, "CSeq: 1");
rtsp_schedule_field(s, s->user_agent);
rtsp_schedule_field(s, "ClientChallenge: 9e26d33f2984236010ef6253fb1887f7");
rtsp_schedule_field(s, "PlayerStarttime: [28/03/2003:22:50:23 00:00]");
rtsp_schedule_field(s, "CompanyID: KnKV4M4I/B2FjJ1TToLycw==");
rtsp_schedule_field(s, "GUID: 00000000-0000-0000-0000-000000000000");
rtsp_schedule_field(s, "RegionData: 0");
rtsp_schedule_field(s, "ClientID: Linux_2.4_6.0.9.1235_play32_RN01_EN_586");
/*rtsp_schedule_field(s, "Pragma: initiate-session");*/
rtsp_request_options(s, NULL);
return s;
}
/*
* closes an rtsp connection
*/
void rtsp_close(rtsp_t *s) {
if (s->server_state) closesocket(s->s); /* TODO: send a TEAROFF */
if (s->path) free(s->path);
if (s->host) free(s->host);
if (s->mrl) free(s->mrl);
if (s->session) free(s->session);
if (s->user_agent) free(s->user_agent);
rtsp_free_answers(s);
rtsp_unschedule_all(s);
free(s);
}
/*
* search in answers for tags. returns a pointer to the content
* after the first matched tag. returns NULL if no match found.
*/
char *rtsp_search_answers(rtsp_t *s, const char *tag) {
char **answer;
char *ptr;
if (!s->answers) return NULL;
answer=s->answers;
while (*answer) {
if (!strncasecmp(*answer,tag,strlen(tag))) {
ptr=strchr(*answer,':');
ptr++;
while(*ptr==' ') ptr++;
return ptr;
}
answer++;
}
return NULL;
}
/*
* session id management
*/
void rtsp_set_session(rtsp_t *s, const char *id) {
if (s->session) free(s->session);
s->session=strdup(id);
}
char *rtsp_get_session(rtsp_t *s) {
return s->session;
}
char *rtsp_get_mrl(rtsp_t *s) {
return s->mrl;
}
char *rtsp_get_param(rtsp_t *s, char *p) {
int len;
char *param;
if (!s->param)
return NULL;
if (!p)
return strdup(s->param);
len = strlen(p);
param = s->param;
while (param && *param) {
char *nparam = strchr(param, '&');
if (strncmp(param, p, len) == 0 && param[len] == '=') {
param += len + 1;
len = nparam ? nparam - param : strlen(param);
nparam = malloc(len + 1);
memcpy(nparam, param, len);
nparam[len] = 0;
return nparam;
}
param = nparam ? nparam + 1 : NULL;
}
return NULL;
}
/*
* schedules a field for transmission
*/
void rtsp_schedule_field(rtsp_t *s, const char *string) {
int i=0;
if (!string) return;
while(s->scheduled[i]) {
i++;
}
s->scheduled[i]=strdup(string);
}
/*
* removes the first scheduled field which prefix matches string.
*/
void rtsp_unschedule_field(rtsp_t *s, const char *string) {
char **ptr=s->scheduled;
if (!string) return;
while(*ptr) {
if (!strncmp(*ptr, string, strlen(string)))
break;
}
if (*ptr) free(*ptr);
ptr++;
do {
*(ptr-1)=*ptr;
} while(*ptr);
}
/*
* unschedule all fields
*/
void rtsp_unschedule_all(rtsp_t *s) {
char **ptr;
if (!s->scheduled) return;
ptr=s->scheduled;
while (*ptr) {
free(*ptr);
*ptr=NULL;
ptr++;
}
}
/*
* free answers
*/
void rtsp_free_answers(rtsp_t *s) {
char **answer;
if (!s->answers) return;
answer=s->answers;
while (*answer) {
free(*answer);
*answer=NULL;
answer++;
}
}
static int realrtsp_streaming_read( int fd, char *buffer, int size, streaming_ctrl_t *stream_ctrl ) {
return rtsp_session_read(stream_ctrl->data, buffer, size);
}
static int realrtsp_streaming_start( stream_t *stream ) {
int fd;
rtsp_session_t *rtsp;
char *mrl;
char *file;
int port;
int redirected, temp;
if( stream==NULL ) return -1;
temp = 5; // counter so we don't get caught in infinite redirections (you never know)
do {
redirected = 0;
fd = connect2Server( stream->streaming_ctrl->url->hostname,
port = (stream->streaming_ctrl->url->port ? stream->streaming_ctrl->url->port : 554),1 );
if(fd<0 && !stream->streaming_ctrl->url->port)
fd = connect2Server(stream->streaming_ctrl->url->hostname, port = 7070, 1);
if(fd<0) return -1;
file = stream->streaming_ctrl->url->file;
if (file[0] == '/')
file++;
mrl = malloc(sizeof(char)*(strlen(stream->streaming_ctrl->url->hostname)+strlen(file)+16));
sprintf(mrl,"rtsp://%s:%i/%s",stream->streaming_ctrl->url->hostname,port,file);
rtsp = rtsp_session_start(fd,&mrl, file, stream->streaming_ctrl->url->hostname, port, &redirected, stream->streaming_ctrl->bandwidth);
if( redirected == 1) {
url_free(stream->streaming_ctrl->url);
stream->streaming_ctrl->url = url_new(mrl);
closesocket(fd);
}
free(mrl);
temp--;
} while( (redirected != 0) && (temp > 0) );
if(!rtsp) return -1;
stream->fd=fd;
stream->streaming_ctrl->data=rtsp;
stream->streaming_ctrl->streaming_read = realrtsp_streaming_read;
//stream->streaming_ctrl->streaming_seek = nop_streaming_seek;
stream->streaming_ctrl->prebuffer_size = 128*1024; // 8 KBytes
stream->streaming_ctrl->buffering = 1;
stream->streaming_ctrl->status = streaming_playing_e;
return 0;
}
static int open_s(stream_t *stream,int mode, void* opts, int* file_format) {
URL_t *url;
mp_msg(MSGT_OPEN, MSGL_INFO, "STREAM_RTSP, URL: %s\n", stream->url);
stream->streaming_ctrl = streaming_ctrl_new();
if( stream->streaming_ctrl==NULL )
return STREAM_ERROR;
stream->streaming_ctrl->bandwidth = network_bandwidth;
url = url_new(stream->url);
stream->streaming_ctrl->url = check4proxies(url);
//url_free(url);
stream->fd = -1;
if(realrtsp_streaming_start( stream ) < 0) {
streaming_ctrl_free(stream->streaming_ctrl);
stream->streaming_ctrl = NULL;
return STREAM_UNSUPORTED;
}
fixup_network_stream_cache(stream);
stream->type = STREAMTYPE_STREAM;
return STREAM_OK;
}
stream_info_t stream_info_rtsp = {
"RealNetworks rtsp streaming",
"realrtsp",
"Roberto Togni, xine team",
"ported from xine",
open_s,
{"rtsp", NULL},
NULL,
0 // Urls are an option string
};
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