kmvc: Use bytestream2 functions to prevent buffer overreads.
[libav.git] / avserver.c
1 /*
2 * Multiple format streaming server
3 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22 #include "config.h"
23 #if !HAVE_CLOSESOCKET
24 #define closesocket close
25 #endif
26 #include <string.h>
27 #include <stdlib.h>
28 #include "libavformat/avformat.h"
29 #include "libavformat/ffm.h"
30 #include "libavformat/network.h"
31 #include "libavformat/os_support.h"
32 #include "libavformat/rtpdec.h"
33 #include "libavformat/rtsp.h"
34 // XXX for ffio_open_dyn_packet_buffer, to be removed
35 #include "libavformat/avio_internal.h"
36 #include "libavutil/avstring.h"
37 #include "libavutil/lfg.h"
38 #include "libavutil/dict.h"
39 #include "libavutil/mathematics.h"
40 #include "libavutil/random_seed.h"
41 #include "libavutil/parseutils.h"
42 #include "libavutil/opt.h"
43 #include <stdarg.h>
44 #include <unistd.h>
45 #include <fcntl.h>
46 #include <sys/ioctl.h>
47 #if HAVE_POLL_H
48 #include <poll.h>
49 #endif
50 #include <errno.h>
51 #include <sys/time.h>
52 #include <time.h>
53 #include <sys/wait.h>
54 #include <signal.h>
55 #if HAVE_DLFCN_H
56 #include <dlfcn.h>
57 #endif
58
59 #include "cmdutils.h"
60
61 const char program_name[] = "avserver";
62 const int program_birth_year = 2000;
63
64 static const OptionDef options[];
65
66 enum HTTPState {
67 HTTPSTATE_WAIT_REQUEST,
68 HTTPSTATE_SEND_HEADER,
69 HTTPSTATE_SEND_DATA_HEADER,
70 HTTPSTATE_SEND_DATA, /* sending TCP or UDP data */
71 HTTPSTATE_SEND_DATA_TRAILER,
72 HTTPSTATE_RECEIVE_DATA,
73 HTTPSTATE_WAIT_FEED, /* wait for data from the feed */
74 HTTPSTATE_READY,
75
76 RTSPSTATE_WAIT_REQUEST,
77 RTSPSTATE_SEND_REPLY,
78 RTSPSTATE_SEND_PACKET,
79 };
80
81 static const char *http_state[] = {
82 "HTTP_WAIT_REQUEST",
83 "HTTP_SEND_HEADER",
84
85 "SEND_DATA_HEADER",
86 "SEND_DATA",
87 "SEND_DATA_TRAILER",
88 "RECEIVE_DATA",
89 "WAIT_FEED",
90 "READY",
91
92 "RTSP_WAIT_REQUEST",
93 "RTSP_SEND_REPLY",
94 "RTSP_SEND_PACKET",
95 };
96
97 #define MAX_STREAMS 20
98
99 #define IOBUFFER_INIT_SIZE 8192
100
101 /* timeouts are in ms */
102 #define HTTP_REQUEST_TIMEOUT (15 * 1000)
103 #define RTSP_REQUEST_TIMEOUT (3600 * 24 * 1000)
104
105 #define SYNC_TIMEOUT (10 * 1000)
106
107 typedef struct RTSPActionServerSetup {
108 uint32_t ipaddr;
109 char transport_option[512];
110 } RTSPActionServerSetup;
111
112 typedef struct {
113 int64_t count1, count2;
114 int64_t time1, time2;
115 } DataRateData;
116
117 /* context associated with one connection */
118 typedef struct HTTPContext {
119 enum HTTPState state;
120 int fd; /* socket file descriptor */
121 struct sockaddr_in from_addr; /* origin */
122 struct pollfd *poll_entry; /* used when polling */
123 int64_t timeout;
124 uint8_t *buffer_ptr, *buffer_end;
125 int http_error;
126 int post;
127 int chunked_encoding;
128 int chunk_size; /* 0 if it needs to be read */
129 struct HTTPContext *next;
130 int got_key_frame; /* stream 0 => 1, stream 1 => 2, stream 2=> 4 */
131 int64_t data_count;
132 /* feed input */
133 int feed_fd;
134 /* input format handling */
135 AVFormatContext *fmt_in;
136 int64_t start_time; /* In milliseconds - this wraps fairly often */
137 int64_t first_pts; /* initial pts value */
138 int64_t cur_pts; /* current pts value from the stream in us */
139 int64_t cur_frame_duration; /* duration of the current frame in us */
140 int cur_frame_bytes; /* output frame size, needed to compute
141 the time at which we send each
142 packet */
143 int pts_stream_index; /* stream we choose as clock reference */
144 int64_t cur_clock; /* current clock reference value in us */
145 /* output format handling */
146 struct FFStream *stream;
147 /* -1 is invalid stream */
148 int feed_streams[MAX_STREAMS]; /* index of streams in the feed */
149 int switch_feed_streams[MAX_STREAMS]; /* index of streams in the feed */
150 int switch_pending;
151 AVFormatContext fmt_ctx; /* instance of FFStream for one user */
152 int last_packet_sent; /* true if last data packet was sent */
153 int suppress_log;
154 DataRateData datarate;
155 int wmp_client_id;
156 char protocol[16];
157 char method[16];
158 char url[128];
159 int buffer_size;
160 uint8_t *buffer;
161 int is_packetized; /* if true, the stream is packetized */
162 int packet_stream_index; /* current stream for output in state machine */
163
164 /* RTSP state specific */
165 uint8_t *pb_buffer; /* XXX: use that in all the code */
166 AVIOContext *pb;
167 int seq; /* RTSP sequence number */
168
169 /* RTP state specific */
170 enum RTSPLowerTransport rtp_protocol;
171 char session_id[32]; /* session id */
172 AVFormatContext *rtp_ctx[MAX_STREAMS];
173
174 /* RTP/UDP specific */
175 URLContext *rtp_handles[MAX_STREAMS];
176
177 /* RTP/TCP specific */
178 struct HTTPContext *rtsp_c;
179 uint8_t *packet_buffer, *packet_buffer_ptr, *packet_buffer_end;
180 } HTTPContext;
181
182 /* each generated stream is described here */
183 enum StreamType {
184 STREAM_TYPE_LIVE,
185 STREAM_TYPE_STATUS,
186 STREAM_TYPE_REDIRECT,
187 };
188
189 enum IPAddressAction {
190 IP_ALLOW = 1,
191 IP_DENY,
192 };
193
194 typedef struct IPAddressACL {
195 struct IPAddressACL *next;
196 enum IPAddressAction action;
197 /* These are in host order */
198 struct in_addr first;
199 struct in_addr last;
200 } IPAddressACL;
201
202 /* description of each stream of the avserver.conf file */
203 typedef struct FFStream {
204 enum StreamType stream_type;
205 char filename[1024]; /* stream filename */
206 struct FFStream *feed; /* feed we are using (can be null if
207 coming from file) */
208 AVDictionary *in_opts; /* input parameters */
209 AVInputFormat *ifmt; /* if non NULL, force input format */
210 AVOutputFormat *fmt;
211 IPAddressACL *acl;
212 char dynamic_acl[1024];
213 int nb_streams;
214 int prebuffer; /* Number of millseconds early to start */
215 int64_t max_time; /* Number of milliseconds to run */
216 int send_on_key;
217 AVStream *streams[MAX_STREAMS];
218 int feed_streams[MAX_STREAMS]; /* index of streams in the feed */
219 char feed_filename[1024]; /* file name of the feed storage, or
220 input file name for a stream */
221 char author[512];
222 char title[512];
223 char copyright[512];
224 char comment[512];
225 pid_t pid; /* of avconv process */
226 time_t pid_start; /* of avconv process */
227 char **child_argv;
228 struct FFStream *next;
229 unsigned bandwidth; /* bandwidth, in kbits/s */
230 /* RTSP options */
231 char *rtsp_option;
232 /* multicast specific */
233 int is_multicast;
234 struct in_addr multicast_ip;
235 int multicast_port; /* first port used for multicast */
236 int multicast_ttl;
237 int loop; /* if true, send the stream in loops (only meaningful if file) */
238
239 /* feed specific */
240 int feed_opened; /* true if someone is writing to the feed */
241 int is_feed; /* true if it is a feed */
242 int readonly; /* True if writing is prohibited to the file */
243 int truncate; /* True if feeder connection truncate the feed file */
244 int conns_served;
245 int64_t bytes_served;
246 int64_t feed_max_size; /* maximum storage size, zero means unlimited */
247 int64_t feed_write_index; /* current write position in feed (it wraps around) */
248 int64_t feed_size; /* current size of feed */
249 struct FFStream *next_feed;
250 } FFStream;
251
252 typedef struct FeedData {
253 long long data_count;
254 float avg_frame_size; /* frame size averaged over last frames with exponential mean */
255 } FeedData;
256
257 static struct sockaddr_in my_http_addr;
258 static struct sockaddr_in my_rtsp_addr;
259
260 static char logfilename[1024];
261 static HTTPContext *first_http_ctx;
262 static FFStream *first_feed; /* contains only feeds */
263 static FFStream *first_stream; /* contains all streams, including feeds */
264
265 static void new_connection(int server_fd, int is_rtsp);
266 static void close_connection(HTTPContext *c);
267
268 /* HTTP handling */
269 static int handle_connection(HTTPContext *c);
270 static int http_parse_request(HTTPContext *c);
271 static int http_send_data(HTTPContext *c);
272 static void compute_status(HTTPContext *c);
273 static int open_input_stream(HTTPContext *c, const char *info);
274 static int http_start_receive_data(HTTPContext *c);
275 static int http_receive_data(HTTPContext *c);
276
277 /* RTSP handling */
278 static int rtsp_parse_request(HTTPContext *c);
279 static void rtsp_cmd_describe(HTTPContext *c, const char *url);
280 static void rtsp_cmd_options(HTTPContext *c, const char *url);
281 static void rtsp_cmd_setup(HTTPContext *c, const char *url, RTSPMessageHeader *h);
282 static void rtsp_cmd_play(HTTPContext *c, const char *url, RTSPMessageHeader *h);
283 static void rtsp_cmd_pause(HTTPContext *c, const char *url, RTSPMessageHeader *h);
284 static void rtsp_cmd_teardown(HTTPContext *c, const char *url, RTSPMessageHeader *h);
285
286 /* SDP handling */
287 static int prepare_sdp_description(FFStream *stream, uint8_t **pbuffer,
288 struct in_addr my_ip);
289
290 /* RTP handling */
291 static HTTPContext *rtp_new_connection(struct sockaddr_in *from_addr,
292 FFStream *stream, const char *session_id,
293 enum RTSPLowerTransport rtp_protocol);
294 static int rtp_new_av_stream(HTTPContext *c,
295 int stream_index, struct sockaddr_in *dest_addr,
296 HTTPContext *rtsp_c);
297
298 static const char *my_program_name;
299 static const char *my_program_dir;
300
301 static const char *config_filename = "/etc/avserver.conf";
302
303 static int avserver_debug;
304 static int avserver_daemon;
305 static int no_launch;
306 static int need_to_start_children;
307
308 /* maximum number of simultaneous HTTP connections */
309 static unsigned int nb_max_http_connections = 2000;
310 static unsigned int nb_max_connections = 5;
311 static unsigned int nb_connections;
312
313 static uint64_t max_bandwidth = 1000;
314 static uint64_t current_bandwidth;
315
316 static int64_t cur_time; // Making this global saves on passing it around everywhere
317
318 static AVLFG random_state;
319
320 static FILE *logfile = NULL;
321
322 void exit_program(int ret)
323 {
324 exit(ret);
325 }
326
327 /* FIXME: make avserver work with IPv6 */
328 /* resolve host with also IP address parsing */
329 static int resolve_host(struct in_addr *sin_addr, const char *hostname)
330 {
331
332 if (!ff_inet_aton(hostname, sin_addr)) {
333 #if HAVE_GETADDRINFO
334 struct addrinfo *ai, *cur;
335 struct addrinfo hints;
336 memset(&hints, 0, sizeof(hints));
337 hints.ai_family = AF_INET;
338 if (getaddrinfo(hostname, NULL, &hints, &ai))
339 return -1;
340 /* getaddrinfo returns a linked list of addrinfo structs.
341 * Even if we set ai_family = AF_INET above, make sure
342 * that the returned one actually is of the correct type. */
343 for (cur = ai; cur; cur = cur->ai_next) {
344 if (cur->ai_family == AF_INET) {
345 *sin_addr = ((struct sockaddr_in *)cur->ai_addr)->sin_addr;
346 freeaddrinfo(ai);
347 return 0;
348 }
349 }
350 freeaddrinfo(ai);
351 return -1;
352 #else
353 struct hostent *hp;
354 hp = gethostbyname(hostname);
355 if (!hp)
356 return -1;
357 memcpy(sin_addr, hp->h_addr_list[0], sizeof(struct in_addr));
358 #endif
359 }
360 return 0;
361 }
362
363 static char *ctime1(char *buf2)
364 {
365 time_t ti;
366 char *p;
367
368 ti = time(NULL);
369 p = ctime(&ti);
370 strcpy(buf2, p);
371 p = buf2 + strlen(p) - 1;
372 if (*p == '\n')
373 *p = '\0';
374 return buf2;
375 }
376
377 static void http_vlog(const char *fmt, va_list vargs)
378 {
379 static int print_prefix = 1;
380 if (logfile) {
381 if (print_prefix) {
382 char buf[32];
383 ctime1(buf);
384 fprintf(logfile, "%s ", buf);
385 }
386 print_prefix = strstr(fmt, "\n") != NULL;
387 vfprintf(logfile, fmt, vargs);
388 fflush(logfile);
389 }
390 }
391
392 #ifdef __GNUC__
393 __attribute__ ((format (printf, 1, 2)))
394 #endif
395 static void http_log(const char *fmt, ...)
396 {
397 va_list vargs;
398 va_start(vargs, fmt);
399 http_vlog(fmt, vargs);
400 va_end(vargs);
401 }
402
403 static void http_av_log(void *ptr, int level, const char *fmt, va_list vargs)
404 {
405 static int print_prefix = 1;
406 AVClass *avc = ptr ? *(AVClass**)ptr : NULL;
407 if (level > av_log_get_level())
408 return;
409 if (print_prefix && avc)
410 http_log("[%s @ %p]", avc->item_name(ptr), ptr);
411 print_prefix = strstr(fmt, "\n") != NULL;
412 http_vlog(fmt, vargs);
413 }
414
415 static void log_connection(HTTPContext *c)
416 {
417 if (c->suppress_log)
418 return;
419
420 http_log("%s - - [%s] \"%s %s\" %d %"PRId64"\n",
421 inet_ntoa(c->from_addr.sin_addr), c->method, c->url,
422 c->protocol, (c->http_error ? c->http_error : 200), c->data_count);
423 }
424
425 static void update_datarate(DataRateData *drd, int64_t count)
426 {
427 if (!drd->time1 && !drd->count1) {
428 drd->time1 = drd->time2 = cur_time;
429 drd->count1 = drd->count2 = count;
430 } else if (cur_time - drd->time2 > 5000) {
431 drd->time1 = drd->time2;
432 drd->count1 = drd->count2;
433 drd->time2 = cur_time;
434 drd->count2 = count;
435 }
436 }
437
438 /* In bytes per second */
439 static int compute_datarate(DataRateData *drd, int64_t count)
440 {
441 if (cur_time == drd->time1)
442 return 0;
443
444 return ((count - drd->count1) * 1000) / (cur_time - drd->time1);
445 }
446
447
448 static void start_children(FFStream *feed)
449 {
450 if (no_launch)
451 return;
452
453 for (; feed; feed = feed->next) {
454 if (feed->child_argv && !feed->pid) {
455 feed->pid_start = time(0);
456
457 feed->pid = fork();
458
459 if (feed->pid < 0) {
460 http_log("Unable to create children\n");
461 exit(1);
462 }
463 if (!feed->pid) {
464 /* In child */
465 char pathname[1024];
466 char *slash;
467 int i;
468
469 av_strlcpy(pathname, my_program_name, sizeof(pathname));
470
471 slash = strrchr(pathname, '/');
472 if (!slash)
473 slash = pathname;
474 else
475 slash++;
476 strcpy(slash, "avconv");
477
478 http_log("Launch command line: ");
479 http_log("%s ", pathname);
480 for (i = 1; feed->child_argv[i] && feed->child_argv[i][0]; i++)
481 http_log("%s ", feed->child_argv[i]);
482 http_log("\n");
483
484 for (i = 3; i < 256; i++)
485 close(i);
486
487 if (!avserver_debug) {
488 i = open("/dev/null", O_RDWR);
489 if (i != -1) {
490 dup2(i, 0);
491 dup2(i, 1);
492 dup2(i, 2);
493 close(i);
494 }
495 }
496
497 /* This is needed to make relative pathnames work */
498 chdir(my_program_dir);
499
500 signal(SIGPIPE, SIG_DFL);
501
502 execvp(pathname, feed->child_argv);
503
504 _exit(1);
505 }
506 }
507 }
508 }
509
510 /* open a listening socket */
511 static int socket_open_listen(struct sockaddr_in *my_addr)
512 {
513 int server_fd, tmp;
514
515 server_fd = socket(AF_INET,SOCK_STREAM,0);
516 if (server_fd < 0) {
517 perror ("socket");
518 return -1;
519 }
520
521 tmp = 1;
522 setsockopt(server_fd, SOL_SOCKET, SO_REUSEADDR, &tmp, sizeof(tmp));
523
524 my_addr->sin_family = AF_INET;
525 if (bind (server_fd, (struct sockaddr *) my_addr, sizeof (*my_addr)) < 0) {
526 char bindmsg[32];
527 snprintf(bindmsg, sizeof(bindmsg), "bind(port %d)", ntohs(my_addr->sin_port));
528 perror (bindmsg);
529 closesocket(server_fd);
530 return -1;
531 }
532
533 if (listen (server_fd, 5) < 0) {
534 perror ("listen");
535 closesocket(server_fd);
536 return -1;
537 }
538 ff_socket_nonblock(server_fd, 1);
539
540 return server_fd;
541 }
542
543 /* start all multicast streams */
544 static void start_multicast(void)
545 {
546 FFStream *stream;
547 char session_id[32];
548 HTTPContext *rtp_c;
549 struct sockaddr_in dest_addr;
550 int default_port, stream_index;
551
552 default_port = 6000;
553 for(stream = first_stream; stream != NULL; stream = stream->next) {
554 if (stream->is_multicast) {
555 /* open the RTP connection */
556 snprintf(session_id, sizeof(session_id), "%08x%08x",
557 av_lfg_get(&random_state), av_lfg_get(&random_state));
558
559 /* choose a port if none given */
560 if (stream->multicast_port == 0) {
561 stream->multicast_port = default_port;
562 default_port += 100;
563 }
564
565 dest_addr.sin_family = AF_INET;
566 dest_addr.sin_addr = stream->multicast_ip;
567 dest_addr.sin_port = htons(stream->multicast_port);
568
569 rtp_c = rtp_new_connection(&dest_addr, stream, session_id,
570 RTSP_LOWER_TRANSPORT_UDP_MULTICAST);
571 if (!rtp_c)
572 continue;
573
574 if (open_input_stream(rtp_c, "") < 0) {
575 http_log("Could not open input stream for stream '%s'\n",
576 stream->filename);
577 continue;
578 }
579
580 /* open each RTP stream */
581 for(stream_index = 0; stream_index < stream->nb_streams;
582 stream_index++) {
583 dest_addr.sin_port = htons(stream->multicast_port +
584 2 * stream_index);
585 if (rtp_new_av_stream(rtp_c, stream_index, &dest_addr, NULL) < 0) {
586 http_log("Could not open output stream '%s/streamid=%d'\n",
587 stream->filename, stream_index);
588 exit(1);
589 }
590 }
591
592 /* change state to send data */
593 rtp_c->state = HTTPSTATE_SEND_DATA;
594 }
595 }
596 }
597
598 /* main loop of the http server */
599 static int http_server(void)
600 {
601 int server_fd = 0, rtsp_server_fd = 0;
602 int ret, delay, delay1;
603 struct pollfd *poll_table, *poll_entry;
604 HTTPContext *c, *c_next;
605
606 if(!(poll_table = av_mallocz((nb_max_http_connections + 2)*sizeof(*poll_table)))) {
607 http_log("Impossible to allocate a poll table handling %d connections.\n", nb_max_http_connections);
608 return -1;
609 }
610
611 if (my_http_addr.sin_port) {
612 server_fd = socket_open_listen(&my_http_addr);
613 if (server_fd < 0)
614 return -1;
615 }
616
617 if (my_rtsp_addr.sin_port) {
618 rtsp_server_fd = socket_open_listen(&my_rtsp_addr);
619 if (rtsp_server_fd < 0)
620 return -1;
621 }
622
623 if (!rtsp_server_fd && !server_fd) {
624 http_log("HTTP and RTSP disabled.\n");
625 return -1;
626 }
627
628 http_log("AVserver started.\n");
629
630 start_children(first_feed);
631
632 start_multicast();
633
634 for(;;) {
635 poll_entry = poll_table;
636 if (server_fd) {
637 poll_entry->fd = server_fd;
638 poll_entry->events = POLLIN;
639 poll_entry++;
640 }
641 if (rtsp_server_fd) {
642 poll_entry->fd = rtsp_server_fd;
643 poll_entry->events = POLLIN;
644 poll_entry++;
645 }
646
647 /* wait for events on each HTTP handle */
648 c = first_http_ctx;
649 delay = 1000;
650 while (c != NULL) {
651 int fd;
652 fd = c->fd;
653 switch(c->state) {
654 case HTTPSTATE_SEND_HEADER:
655 case RTSPSTATE_SEND_REPLY:
656 case RTSPSTATE_SEND_PACKET:
657 c->poll_entry = poll_entry;
658 poll_entry->fd = fd;
659 poll_entry->events = POLLOUT;
660 poll_entry++;
661 break;
662 case HTTPSTATE_SEND_DATA_HEADER:
663 case HTTPSTATE_SEND_DATA:
664 case HTTPSTATE_SEND_DATA_TRAILER:
665 if (!c->is_packetized) {
666 /* for TCP, we output as much as we can (may need to put a limit) */
667 c->poll_entry = poll_entry;
668 poll_entry->fd = fd;
669 poll_entry->events = POLLOUT;
670 poll_entry++;
671 } else {
672 /* when avserver is doing the timing, we work by
673 looking at which packet need to be sent every
674 10 ms */
675 delay1 = 10; /* one tick wait XXX: 10 ms assumed */
676 if (delay1 < delay)
677 delay = delay1;
678 }
679 break;
680 case HTTPSTATE_WAIT_REQUEST:
681 case HTTPSTATE_RECEIVE_DATA:
682 case HTTPSTATE_WAIT_FEED:
683 case RTSPSTATE_WAIT_REQUEST:
684 /* need to catch errors */
685 c->poll_entry = poll_entry;
686 poll_entry->fd = fd;
687 poll_entry->events = POLLIN;/* Maybe this will work */
688 poll_entry++;
689 break;
690 default:
691 c->poll_entry = NULL;
692 break;
693 }
694 c = c->next;
695 }
696
697 /* wait for an event on one connection. We poll at least every
698 second to handle timeouts */
699 do {
700 ret = poll(poll_table, poll_entry - poll_table, delay);
701 if (ret < 0 && ff_neterrno() != AVERROR(EAGAIN) &&
702 ff_neterrno() != AVERROR(EINTR))
703 return -1;
704 } while (ret < 0);
705
706 cur_time = av_gettime() / 1000;
707
708 if (need_to_start_children) {
709 need_to_start_children = 0;
710 start_children(first_feed);
711 }
712
713 /* now handle the events */
714 for(c = first_http_ctx; c != NULL; c = c_next) {
715 c_next = c->next;
716 if (handle_connection(c) < 0) {
717 /* close and free the connection */
718 log_connection(c);
719 close_connection(c);
720 }
721 }
722
723 poll_entry = poll_table;
724 if (server_fd) {
725 /* new HTTP connection request ? */
726 if (poll_entry->revents & POLLIN)
727 new_connection(server_fd, 0);
728 poll_entry++;
729 }
730 if (rtsp_server_fd) {
731 /* new RTSP connection request ? */
732 if (poll_entry->revents & POLLIN)
733 new_connection(rtsp_server_fd, 1);
734 }
735 }
736 }
737
738 /* start waiting for a new HTTP/RTSP request */
739 static void start_wait_request(HTTPContext *c, int is_rtsp)
740 {
741 c->buffer_ptr = c->buffer;
742 c->buffer_end = c->buffer + c->buffer_size - 1; /* leave room for '\0' */
743
744 if (is_rtsp) {
745 c->timeout = cur_time + RTSP_REQUEST_TIMEOUT;
746 c->state = RTSPSTATE_WAIT_REQUEST;
747 } else {
748 c->timeout = cur_time + HTTP_REQUEST_TIMEOUT;
749 c->state = HTTPSTATE_WAIT_REQUEST;
750 }
751 }
752
753 static void http_send_too_busy_reply(int fd)
754 {
755 char buffer[300];
756 int len = snprintf(buffer, sizeof(buffer),
757 "HTTP/1.0 503 Server too busy\r\n"
758 "Content-type: text/html\r\n"
759 "\r\n"
760 "<html><head><title>Too busy</title></head><body>\r\n"
761 "<p>The server is too busy to serve your request at this time.</p>\r\n"
762 "<p>The number of current connections is %d, and this exceeds the limit of %d.</p>\r\n"
763 "</body></html>\r\n",
764 nb_connections, nb_max_connections);
765 send(fd, buffer, len, 0);
766 }
767
768
769 static void new_connection(int server_fd, int is_rtsp)
770 {
771 struct sockaddr_in from_addr;
772 int fd, len;
773 HTTPContext *c = NULL;
774
775 len = sizeof(from_addr);
776 fd = accept(server_fd, (struct sockaddr *)&from_addr,
777 &len);
778 if (fd < 0) {
779 http_log("error during accept %s\n", strerror(errno));
780 return;
781 }
782 ff_socket_nonblock(fd, 1);
783
784 if (nb_connections >= nb_max_connections) {
785 http_send_too_busy_reply(fd);
786 goto fail;
787 }
788
789 /* add a new connection */
790 c = av_mallocz(sizeof(HTTPContext));
791 if (!c)
792 goto fail;
793
794 c->fd = fd;
795 c->poll_entry = NULL;
796 c->from_addr = from_addr;
797 c->buffer_size = IOBUFFER_INIT_SIZE;
798 c->buffer = av_malloc(c->buffer_size);
799 if (!c->buffer)
800 goto fail;
801
802 c->next = first_http_ctx;
803 first_http_ctx = c;
804 nb_connections++;
805
806 start_wait_request(c, is_rtsp);
807
808 return;
809
810 fail:
811 if (c) {
812 av_free(c->buffer);
813 av_free(c);
814 }
815 closesocket(fd);
816 }
817
818 static void close_connection(HTTPContext *c)
819 {
820 HTTPContext **cp, *c1;
821 int i, nb_streams;
822 AVFormatContext *ctx;
823 URLContext *h;
824 AVStream *st;
825
826 /* remove connection from list */
827 cp = &first_http_ctx;
828 while ((*cp) != NULL) {
829 c1 = *cp;
830 if (c1 == c)
831 *cp = c->next;
832 else
833 cp = &c1->next;
834 }
835
836 /* remove references, if any (XXX: do it faster) */
837 for(c1 = first_http_ctx; c1 != NULL; c1 = c1->next) {
838 if (c1->rtsp_c == c)
839 c1->rtsp_c = NULL;
840 }
841
842 /* remove connection associated resources */
843 if (c->fd >= 0)
844 closesocket(c->fd);
845 if (c->fmt_in) {
846 /* close each frame parser */
847 for(i=0;i<c->fmt_in->nb_streams;i++) {
848 st = c->fmt_in->streams[i];
849 if (st->codec->codec)
850 avcodec_close(st->codec);
851 }
852 avformat_close_input(&c->fmt_in);
853 }
854
855 /* free RTP output streams if any */
856 nb_streams = 0;
857 if (c->stream)
858 nb_streams = c->stream->nb_streams;
859
860 for(i=0;i<nb_streams;i++) {
861 ctx = c->rtp_ctx[i];
862 if (ctx) {
863 av_write_trailer(ctx);
864 av_dict_free(&ctx->metadata);
865 av_free(ctx->streams[0]);
866 av_free(ctx);
867 }
868 h = c->rtp_handles[i];
869 if (h)
870 url_close(h);
871 }
872
873 ctx = &c->fmt_ctx;
874
875 if (!c->last_packet_sent && c->state == HTTPSTATE_SEND_DATA_TRAILER) {
876 if (ctx->oformat) {
877 /* prepare header */
878 if (avio_open_dyn_buf(&ctx->pb) >= 0) {
879 av_write_trailer(ctx);
880 av_freep(&c->pb_buffer);
881 avio_close_dyn_buf(ctx->pb, &c->pb_buffer);
882 }
883 }
884 }
885
886 for(i=0; i<ctx->nb_streams; i++)
887 av_free(ctx->streams[i]);
888
889 if (c->stream && !c->post && c->stream->stream_type == STREAM_TYPE_LIVE)
890 current_bandwidth -= c->stream->bandwidth;
891
892 /* signal that there is no feed if we are the feeder socket */
893 if (c->state == HTTPSTATE_RECEIVE_DATA && c->stream) {
894 c->stream->feed_opened = 0;
895 close(c->feed_fd);
896 }
897
898 av_freep(&c->pb_buffer);
899 av_freep(&c->packet_buffer);
900 av_free(c->buffer);
901 av_free(c);
902 nb_connections--;
903 }
904
905 static int handle_connection(HTTPContext *c)
906 {
907 int len, ret;
908
909 switch(c->state) {
910 case HTTPSTATE_WAIT_REQUEST:
911 case RTSPSTATE_WAIT_REQUEST:
912 /* timeout ? */
913 if ((c->timeout - cur_time) < 0)
914 return -1;
915 if (c->poll_entry->revents & (POLLERR | POLLHUP))
916 return -1;
917
918 /* no need to read if no events */
919 if (!(c->poll_entry->revents & POLLIN))
920 return 0;
921 /* read the data */
922 read_loop:
923 len = recv(c->fd, c->buffer_ptr, 1, 0);
924 if (len < 0) {
925 if (ff_neterrno() != AVERROR(EAGAIN) &&
926 ff_neterrno() != AVERROR(EINTR))
927 return -1;
928 } else if (len == 0) {
929 return -1;
930 } else {
931 /* search for end of request. */
932 uint8_t *ptr;
933 c->buffer_ptr += len;
934 ptr = c->buffer_ptr;
935 if ((ptr >= c->buffer + 2 && !memcmp(ptr-2, "\n\n", 2)) ||
936 (ptr >= c->buffer + 4 && !memcmp(ptr-4, "\r\n\r\n", 4))) {
937 /* request found : parse it and reply */
938 if (c->state == HTTPSTATE_WAIT_REQUEST) {
939 ret = http_parse_request(c);
940 } else {
941 ret = rtsp_parse_request(c);
942 }
943 if (ret < 0)
944 return -1;
945 } else if (ptr >= c->buffer_end) {
946 /* request too long: cannot do anything */
947 return -1;
948 } else goto read_loop;
949 }
950 break;
951
952 case HTTPSTATE_SEND_HEADER:
953 if (c->poll_entry->revents & (POLLERR | POLLHUP))
954 return -1;
955
956 /* no need to write if no events */
957 if (!(c->poll_entry->revents & POLLOUT))
958 return 0;
959 len = send(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr, 0);
960 if (len < 0) {
961 if (ff_neterrno() != AVERROR(EAGAIN) &&
962 ff_neterrno() != AVERROR(EINTR)) {
963 /* error : close connection */
964 av_freep(&c->pb_buffer);
965 return -1;
966 }
967 } else {
968 c->buffer_ptr += len;
969 if (c->stream)
970 c->stream->bytes_served += len;
971 c->data_count += len;
972 if (c->buffer_ptr >= c->buffer_end) {
973 av_freep(&c->pb_buffer);
974 /* if error, exit */
975 if (c->http_error)
976 return -1;
977 /* all the buffer was sent : synchronize to the incoming stream */
978 c->state = HTTPSTATE_SEND_DATA_HEADER;
979 c->buffer_ptr = c->buffer_end = c->buffer;
980 }
981 }
982 break;
983
984 case HTTPSTATE_SEND_DATA:
985 case HTTPSTATE_SEND_DATA_HEADER:
986 case HTTPSTATE_SEND_DATA_TRAILER:
987 /* for packetized output, we consider we can always write (the
988 input streams sets the speed). It may be better to verify
989 that we do not rely too much on the kernel queues */
990 if (!c->is_packetized) {
991 if (c->poll_entry->revents & (POLLERR | POLLHUP))
992 return -1;
993
994 /* no need to read if no events */
995 if (!(c->poll_entry->revents & POLLOUT))
996 return 0;
997 }
998 if (http_send_data(c) < 0)
999 return -1;
1000 /* close connection if trailer sent */
1001 if (c->state == HTTPSTATE_SEND_DATA_TRAILER)
1002 return -1;
1003 break;
1004 case HTTPSTATE_RECEIVE_DATA:
1005 /* no need to read if no events */
1006 if (c->poll_entry->revents & (POLLERR | POLLHUP))
1007 return -1;
1008 if (!(c->poll_entry->revents & POLLIN))
1009 return 0;
1010 if (http_receive_data(c) < 0)
1011 return -1;
1012 break;
1013 case HTTPSTATE_WAIT_FEED:
1014 /* no need to read if no events */
1015 if (c->poll_entry->revents & (POLLIN | POLLERR | POLLHUP))
1016 return -1;
1017
1018 /* nothing to do, we'll be waken up by incoming feed packets */
1019 break;
1020
1021 case RTSPSTATE_SEND_REPLY:
1022 if (c->poll_entry->revents & (POLLERR | POLLHUP)) {
1023 av_freep(&c->pb_buffer);
1024 return -1;
1025 }
1026 /* no need to write if no events */
1027 if (!(c->poll_entry->revents & POLLOUT))
1028 return 0;
1029 len = send(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr, 0);
1030 if (len < 0) {
1031 if (ff_neterrno() != AVERROR(EAGAIN) &&
1032 ff_neterrno() != AVERROR(EINTR)) {
1033 /* error : close connection */
1034 av_freep(&c->pb_buffer);
1035 return -1;
1036 }
1037 } else {
1038 c->buffer_ptr += len;
1039 c->data_count += len;
1040 if (c->buffer_ptr >= c->buffer_end) {
1041 /* all the buffer was sent : wait for a new request */
1042 av_freep(&c->pb_buffer);
1043 start_wait_request(c, 1);
1044 }
1045 }
1046 break;
1047 case RTSPSTATE_SEND_PACKET:
1048 if (c->poll_entry->revents & (POLLERR | POLLHUP)) {
1049 av_freep(&c->packet_buffer);
1050 return -1;
1051 }
1052 /* no need to write if no events */
1053 if (!(c->poll_entry->revents & POLLOUT))
1054 return 0;
1055 len = send(c->fd, c->packet_buffer_ptr,
1056 c->packet_buffer_end - c->packet_buffer_ptr, 0);
1057 if (len < 0) {
1058 if (ff_neterrno() != AVERROR(EAGAIN) &&
1059 ff_neterrno() != AVERROR(EINTR)) {
1060 /* error : close connection */
1061 av_freep(&c->packet_buffer);
1062 return -1;
1063 }
1064 } else {
1065 c->packet_buffer_ptr += len;
1066 if (c->packet_buffer_ptr >= c->packet_buffer_end) {
1067 /* all the buffer was sent : wait for a new request */
1068 av_freep(&c->packet_buffer);
1069 c->state = RTSPSTATE_WAIT_REQUEST;
1070 }
1071 }
1072 break;
1073 case HTTPSTATE_READY:
1074 /* nothing to do */
1075 break;
1076 default:
1077 return -1;
1078 }
1079 return 0;
1080 }
1081
1082 static int extract_rates(char *rates, int ratelen, const char *request)
1083 {
1084 const char *p;
1085
1086 for (p = request; *p && *p != '\r' && *p != '\n'; ) {
1087 if (av_strncasecmp(p, "Pragma:", 7) == 0) {
1088 const char *q = p + 7;
1089
1090 while (*q && *q != '\n' && isspace(*q))
1091 q++;
1092
1093 if (av_strncasecmp(q, "stream-switch-entry=", 20) == 0) {
1094 int stream_no;
1095 int rate_no;
1096
1097 q += 20;
1098
1099 memset(rates, 0xff, ratelen);
1100
1101 while (1) {
1102 while (*q && *q != '\n' && *q != ':')
1103 q++;
1104
1105 if (sscanf(q, ":%d:%d", &stream_no, &rate_no) != 2)
1106 break;
1107
1108 stream_no--;
1109 if (stream_no < ratelen && stream_no >= 0)
1110 rates[stream_no] = rate_no;
1111
1112 while (*q && *q != '\n' && !isspace(*q))
1113 q++;
1114 }
1115
1116 return 1;
1117 }
1118 }
1119 p = strchr(p, '\n');
1120 if (!p)
1121 break;
1122
1123 p++;
1124 }
1125
1126 return 0;
1127 }
1128
1129 static int find_stream_in_feed(FFStream *feed, AVCodecContext *codec, int bit_rate)
1130 {
1131 int i;
1132 int best_bitrate = 100000000;
1133 int best = -1;
1134
1135 for (i = 0; i < feed->nb_streams; i++) {
1136 AVCodecContext *feed_codec = feed->streams[i]->codec;
1137
1138 if (feed_codec->codec_id != codec->codec_id ||
1139 feed_codec->sample_rate != codec->sample_rate ||
1140 feed_codec->width != codec->width ||
1141 feed_codec->height != codec->height)
1142 continue;
1143
1144 /* Potential stream */
1145
1146 /* We want the fastest stream less than bit_rate, or the slowest
1147 * faster than bit_rate
1148 */
1149
1150 if (feed_codec->bit_rate <= bit_rate) {
1151 if (best_bitrate > bit_rate || feed_codec->bit_rate > best_bitrate) {
1152 best_bitrate = feed_codec->bit_rate;
1153 best = i;
1154 }
1155 } else {
1156 if (feed_codec->bit_rate < best_bitrate) {
1157 best_bitrate = feed_codec->bit_rate;
1158 best = i;
1159 }
1160 }
1161 }
1162
1163 return best;
1164 }
1165
1166 static int modify_current_stream(HTTPContext *c, char *rates)
1167 {
1168 int i;
1169 FFStream *req = c->stream;
1170 int action_required = 0;
1171
1172 /* Not much we can do for a feed */
1173 if (!req->feed)
1174 return 0;
1175
1176 for (i = 0; i < req->nb_streams; i++) {
1177 AVCodecContext *codec = req->streams[i]->codec;
1178
1179 switch(rates[i]) {
1180 case 0:
1181 c->switch_feed_streams[i] = req->feed_streams[i];
1182 break;
1183 case 1:
1184 c->switch_feed_streams[i] = find_stream_in_feed(req->feed, codec, codec->bit_rate / 2);
1185 break;
1186 case 2:
1187 /* Wants off or slow */
1188 c->switch_feed_streams[i] = find_stream_in_feed(req->feed, codec, codec->bit_rate / 4);
1189 #ifdef WANTS_OFF
1190 /* This doesn't work well when it turns off the only stream! */
1191 c->switch_feed_streams[i] = -2;
1192 c->feed_streams[i] = -2;
1193 #endif
1194 break;
1195 }
1196
1197 if (c->switch_feed_streams[i] >= 0 && c->switch_feed_streams[i] != c->feed_streams[i])
1198 action_required = 1;
1199 }
1200
1201 return action_required;
1202 }
1203
1204 /* XXX: factorize in utils.c ? */
1205 /* XXX: take care with different space meaning */
1206 static void skip_spaces(const char **pp)
1207 {
1208 const char *p;
1209 p = *pp;
1210 while (*p == ' ' || *p == '\t')
1211 p++;
1212 *pp = p;
1213 }
1214
1215 static void get_word(char *buf, int buf_size, const char **pp)
1216 {
1217 const char *p;
1218 char *q;
1219
1220 p = *pp;
1221 skip_spaces(&p);
1222 q = buf;
1223 while (!isspace(*p) && *p != '\0') {
1224 if ((q - buf) < buf_size - 1)
1225 *q++ = *p;
1226 p++;
1227 }
1228 if (buf_size > 0)
1229 *q = '\0';
1230 *pp = p;
1231 }
1232
1233 static void get_arg(char *buf, int buf_size, const char **pp)
1234 {
1235 const char *p;
1236 char *q;
1237 int quote;
1238
1239 p = *pp;
1240 while (isspace(*p)) p++;
1241 q = buf;
1242 quote = 0;
1243 if (*p == '\"' || *p == '\'')
1244 quote = *p++;
1245 for(;;) {
1246 if (quote) {
1247 if (*p == quote)
1248 break;
1249 } else {
1250 if (isspace(*p))
1251 break;
1252 }
1253 if (*p == '\0')
1254 break;
1255 if ((q - buf) < buf_size - 1)
1256 *q++ = *p;
1257 p++;
1258 }
1259 *q = '\0';
1260 if (quote && *p == quote)
1261 p++;
1262 *pp = p;
1263 }
1264
1265 static void parse_acl_row(FFStream *stream, FFStream* feed, IPAddressACL *ext_acl,
1266 const char *p, const char *filename, int line_num)
1267 {
1268 char arg[1024];
1269 IPAddressACL acl;
1270 int errors = 0;
1271
1272 get_arg(arg, sizeof(arg), &p);
1273 if (av_strcasecmp(arg, "allow") == 0)
1274 acl.action = IP_ALLOW;
1275 else if (av_strcasecmp(arg, "deny") == 0)
1276 acl.action = IP_DENY;
1277 else {
1278 fprintf(stderr, "%s:%d: ACL action '%s' is not ALLOW or DENY\n",
1279 filename, line_num, arg);
1280 errors++;
1281 }
1282
1283 get_arg(arg, sizeof(arg), &p);
1284
1285 if (resolve_host(&acl.first, arg) != 0) {
1286 fprintf(stderr, "%s:%d: ACL refers to invalid host or ip address '%s'\n",
1287 filename, line_num, arg);
1288 errors++;
1289 } else
1290 acl.last = acl.first;
1291
1292 get_arg(arg, sizeof(arg), &p);
1293
1294 if (arg[0]) {
1295 if (resolve_host(&acl.last, arg) != 0) {
1296 fprintf(stderr, "%s:%d: ACL refers to invalid host or ip address '%s'\n",
1297 filename, line_num, arg);
1298 errors++;
1299 }
1300 }
1301
1302 if (!errors) {
1303 IPAddressACL *nacl = av_mallocz(sizeof(*nacl));
1304 IPAddressACL **naclp = 0;
1305
1306 acl.next = 0;
1307 *nacl = acl;
1308
1309 if (stream)
1310 naclp = &stream->acl;
1311 else if (feed)
1312 naclp = &feed->acl;
1313 else if (ext_acl)
1314 naclp = &ext_acl;
1315 else {
1316 fprintf(stderr, "%s:%d: ACL found not in <stream> or <feed>\n",
1317 filename, line_num);
1318 errors++;
1319 }
1320
1321 if (naclp) {
1322 while (*naclp)
1323 naclp = &(*naclp)->next;
1324
1325 *naclp = nacl;
1326 }
1327 }
1328 }
1329
1330
1331 static IPAddressACL* parse_dynamic_acl(FFStream *stream, HTTPContext *c)
1332 {
1333 FILE* f;
1334 char line[1024];
1335 char cmd[1024];
1336 IPAddressACL *acl = NULL;
1337 int line_num = 0;
1338 const char *p;
1339
1340 f = fopen(stream->dynamic_acl, "r");
1341 if (!f) {
1342 perror(stream->dynamic_acl);
1343 return NULL;
1344 }
1345
1346 acl = av_mallocz(sizeof(IPAddressACL));
1347
1348 /* Build ACL */
1349 for(;;) {
1350 if (fgets(line, sizeof(line), f) == NULL)
1351 break;
1352 line_num++;
1353 p = line;
1354 while (isspace(*p))
1355 p++;
1356 if (*p == '\0' || *p == '#')
1357 continue;
1358 get_arg(cmd, sizeof(cmd), &p);
1359
1360 if (!av_strcasecmp(cmd, "ACL"))
1361 parse_acl_row(NULL, NULL, acl, p, stream->dynamic_acl, line_num);
1362 }
1363 fclose(f);
1364 return acl;
1365 }
1366
1367
1368 static void free_acl_list(IPAddressACL *in_acl)
1369 {
1370 IPAddressACL *pacl,*pacl2;
1371
1372 pacl = in_acl;
1373 while(pacl) {
1374 pacl2 = pacl;
1375 pacl = pacl->next;
1376 av_freep(pacl2);
1377 }
1378 }
1379
1380 static int validate_acl_list(IPAddressACL *in_acl, HTTPContext *c)
1381 {
1382 enum IPAddressAction last_action = IP_DENY;
1383 IPAddressACL *acl;
1384 struct in_addr *src = &c->from_addr.sin_addr;
1385 unsigned long src_addr = src->s_addr;
1386
1387 for (acl = in_acl; acl; acl = acl->next) {
1388 if (src_addr >= acl->first.s_addr && src_addr <= acl->last.s_addr)
1389 return (acl->action == IP_ALLOW) ? 1 : 0;
1390 last_action = acl->action;
1391 }
1392
1393 /* Nothing matched, so return not the last action */
1394 return (last_action == IP_DENY) ? 1 : 0;
1395 }
1396
1397 static int validate_acl(FFStream *stream, HTTPContext *c)
1398 {
1399 int ret = 0;
1400 IPAddressACL *acl;
1401
1402
1403 /* if stream->acl is null validate_acl_list will return 1 */
1404 ret = validate_acl_list(stream->acl, c);
1405
1406 if (stream->dynamic_acl[0]) {
1407 acl = parse_dynamic_acl(stream, c);
1408
1409 ret = validate_acl_list(acl, c);
1410
1411 free_acl_list(acl);
1412 }
1413
1414 return ret;
1415 }
1416
1417 /* compute the real filename of a file by matching it without its
1418 extensions to all the stream filenames */
1419 static void compute_real_filename(char *filename, int max_size)
1420 {
1421 char file1[1024];
1422 char file2[1024];
1423 char *p;
1424 FFStream *stream;
1425
1426 /* compute filename by matching without the file extensions */
1427 av_strlcpy(file1, filename, sizeof(file1));
1428 p = strrchr(file1, '.');
1429 if (p)
1430 *p = '\0';
1431 for(stream = first_stream; stream != NULL; stream = stream->next) {
1432 av_strlcpy(file2, stream->filename, sizeof(file2));
1433 p = strrchr(file2, '.');
1434 if (p)
1435 *p = '\0';
1436 if (!strcmp(file1, file2)) {
1437 av_strlcpy(filename, stream->filename, max_size);
1438 break;
1439 }
1440 }
1441 }
1442
1443 enum RedirType {
1444 REDIR_NONE,
1445 REDIR_ASX,
1446 REDIR_RAM,
1447 REDIR_ASF,
1448 REDIR_RTSP,
1449 REDIR_SDP,
1450 };
1451
1452 /* parse http request and prepare header */
1453 static int http_parse_request(HTTPContext *c)
1454 {
1455 char *p;
1456 enum RedirType redir_type;
1457 char cmd[32];
1458 char info[1024], filename[1024];
1459 char url[1024], *q;
1460 char protocol[32];
1461 char msg[1024];
1462 const char *mime_type;
1463 FFStream *stream;
1464 int i;
1465 char ratebuf[32];
1466 char *useragent = 0;
1467
1468 p = c->buffer;
1469 get_word(cmd, sizeof(cmd), (const char **)&p);
1470 av_strlcpy(c->method, cmd, sizeof(c->method));
1471
1472 if (!strcmp(cmd, "GET"))
1473 c->post = 0;
1474 else if (!strcmp(cmd, "POST"))
1475 c->post = 1;
1476 else
1477 return -1;
1478
1479 get_word(url, sizeof(url), (const char **)&p);
1480 av_strlcpy(c->url, url, sizeof(c->url));
1481
1482 get_word(protocol, sizeof(protocol), (const char **)&p);
1483 if (strcmp(protocol, "HTTP/1.0") && strcmp(protocol, "HTTP/1.1"))
1484 return -1;
1485
1486 av_strlcpy(c->protocol, protocol, sizeof(c->protocol));
1487
1488 if (avserver_debug)
1489 http_log("%s - - New connection: %s %s\n", inet_ntoa(c->from_addr.sin_addr), cmd, url);
1490
1491 /* find the filename and the optional info string in the request */
1492 p = strchr(url, '?');
1493 if (p) {
1494 av_strlcpy(info, p, sizeof(info));
1495 *p = '\0';
1496 } else
1497 info[0] = '\0';
1498
1499 av_strlcpy(filename, url + ((*url == '/') ? 1 : 0), sizeof(filename)-1);
1500
1501 for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
1502 if (av_strncasecmp(p, "User-Agent:", 11) == 0) {
1503 useragent = p + 11;
1504 if (*useragent && *useragent != '\n' && isspace(*useragent))
1505 useragent++;
1506 break;
1507 }
1508 p = strchr(p, '\n');
1509 if (!p)
1510 break;
1511
1512 p++;
1513 }
1514
1515 redir_type = REDIR_NONE;
1516 if (av_match_ext(filename, "asx")) {
1517 redir_type = REDIR_ASX;
1518 filename[strlen(filename)-1] = 'f';
1519 } else if (av_match_ext(filename, "asf") &&
1520 (!useragent || av_strncasecmp(useragent, "NSPlayer", 8) != 0)) {
1521 /* if this isn't WMP or lookalike, return the redirector file */
1522 redir_type = REDIR_ASF;
1523 } else if (av_match_ext(filename, "rpm,ram")) {
1524 redir_type = REDIR_RAM;
1525 strcpy(filename + strlen(filename)-2, "m");
1526 } else if (av_match_ext(filename, "rtsp")) {
1527 redir_type = REDIR_RTSP;
1528 compute_real_filename(filename, sizeof(filename) - 1);
1529 } else if (av_match_ext(filename, "sdp")) {
1530 redir_type = REDIR_SDP;
1531 compute_real_filename(filename, sizeof(filename) - 1);
1532 }
1533
1534 // "redirect" / request to index.html
1535 if (!strlen(filename))
1536 av_strlcpy(filename, "index.html", sizeof(filename) - 1);
1537
1538 stream = first_stream;
1539 while (stream != NULL) {
1540 if (!strcmp(stream->filename, filename) && validate_acl(stream, c))
1541 break;
1542 stream = stream->next;
1543 }
1544 if (stream == NULL) {
1545 snprintf(msg, sizeof(msg), "File '%s' not found", url);
1546 http_log("File '%s' not found\n", url);
1547 goto send_error;
1548 }
1549
1550 c->stream = stream;
1551 memcpy(c->feed_streams, stream->feed_streams, sizeof(c->feed_streams));
1552 memset(c->switch_feed_streams, -1, sizeof(c->switch_feed_streams));
1553
1554 if (stream->stream_type == STREAM_TYPE_REDIRECT) {
1555 c->http_error = 301;
1556 q = c->buffer;
1557 q += snprintf(q, c->buffer_size,
1558 "HTTP/1.0 301 Moved\r\n"
1559 "Location: %s\r\n"
1560 "Content-type: text/html\r\n"
1561 "\r\n"
1562 "<html><head><title>Moved</title></head><body>\r\n"
1563 "You should be <a href=\"%s\">redirected</a>.\r\n"
1564 "</body></html>\r\n", stream->feed_filename, stream->feed_filename);
1565 /* prepare output buffer */
1566 c->buffer_ptr = c->buffer;
1567 c->buffer_end = q;
1568 c->state = HTTPSTATE_SEND_HEADER;
1569 return 0;
1570 }
1571
1572 /* If this is WMP, get the rate information */
1573 if (extract_rates(ratebuf, sizeof(ratebuf), c->buffer)) {
1574 if (modify_current_stream(c, ratebuf)) {
1575 for (i = 0; i < FF_ARRAY_ELEMS(c->feed_streams); i++) {
1576 if (c->switch_feed_streams[i] >= 0)
1577 c->switch_feed_streams[i] = -1;
1578 }
1579 }
1580 }
1581
1582 if (c->post == 0 && stream->stream_type == STREAM_TYPE_LIVE)
1583 current_bandwidth += stream->bandwidth;
1584
1585 /* If already streaming this feed, do not let start another feeder. */
1586 if (stream->feed_opened) {
1587 snprintf(msg, sizeof(msg), "This feed is already being received.");
1588 http_log("Feed '%s' already being received\n", stream->feed_filename);
1589 goto send_error;
1590 }
1591
1592 if (c->post == 0 && max_bandwidth < current_bandwidth) {
1593 c->http_error = 503;
1594 q = c->buffer;
1595 q += snprintf(q, c->buffer_size,
1596 "HTTP/1.0 503 Server too busy\r\n"
1597 "Content-type: text/html\r\n"
1598 "\r\n"
1599 "<html><head><title>Too busy</title></head><body>\r\n"
1600 "<p>The server is too busy to serve your request at this time.</p>\r\n"
1601 "<p>The bandwidth being served (including your stream) is %"PRIu64"kbit/sec, "
1602 "and this exceeds the limit of %"PRIu64"kbit/sec.</p>\r\n"
1603 "</body></html>\r\n", current_bandwidth, max_bandwidth);
1604 /* prepare output buffer */
1605 c->buffer_ptr = c->buffer;
1606 c->buffer_end = q;
1607 c->state = HTTPSTATE_SEND_HEADER;
1608 return 0;
1609 }
1610
1611 if (redir_type != REDIR_NONE) {
1612 char *hostinfo = 0;
1613
1614 for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
1615 if (av_strncasecmp(p, "Host:", 5) == 0) {
1616 hostinfo = p + 5;
1617 break;
1618 }
1619 p = strchr(p, '\n');
1620 if (!p)
1621 break;
1622
1623 p++;
1624 }
1625
1626 if (hostinfo) {
1627 char *eoh;
1628 char hostbuf[260];
1629
1630 while (isspace(*hostinfo))
1631 hostinfo++;
1632
1633 eoh = strchr(hostinfo, '\n');
1634 if (eoh) {
1635 if (eoh[-1] == '\r')
1636 eoh--;
1637
1638 if (eoh - hostinfo < sizeof(hostbuf) - 1) {
1639 memcpy(hostbuf, hostinfo, eoh - hostinfo);
1640 hostbuf[eoh - hostinfo] = 0;
1641
1642 c->http_error = 200;
1643 q = c->buffer;
1644 switch(redir_type) {
1645 case REDIR_ASX:
1646 q += snprintf(q, c->buffer_size,
1647 "HTTP/1.0 200 ASX Follows\r\n"
1648 "Content-type: video/x-ms-asf\r\n"
1649 "\r\n"
1650 "<ASX Version=\"3\">\r\n"
1651 //"<!-- Autogenerated by avserver -->\r\n"
1652 "<ENTRY><REF HREF=\"http://%s/%s%s\"/></ENTRY>\r\n"
1653 "</ASX>\r\n", hostbuf, filename, info);
1654 break;
1655 case REDIR_RAM:
1656 q += snprintf(q, c->buffer_size,
1657 "HTTP/1.0 200 RAM Follows\r\n"
1658 "Content-type: audio/x-pn-realaudio\r\n"
1659 "\r\n"
1660 "# Autogenerated by avserver\r\n"
1661 "http://%s/%s%s\r\n", hostbuf, filename, info);
1662 break;
1663 case REDIR_ASF:
1664 q += snprintf(q, c->buffer_size,
1665 "HTTP/1.0 200 ASF Redirect follows\r\n"
1666 "Content-type: video/x-ms-asf\r\n"
1667 "\r\n"
1668 "[Reference]\r\n"
1669 "Ref1=http://%s/%s%s\r\n", hostbuf, filename, info);
1670 break;
1671 case REDIR_RTSP:
1672 {
1673 char hostname[256], *p;
1674 /* extract only hostname */
1675 av_strlcpy(hostname, hostbuf, sizeof(hostname));
1676 p = strrchr(hostname, ':');
1677 if (p)
1678 *p = '\0';
1679 q += snprintf(q, c->buffer_size,
1680 "HTTP/1.0 200 RTSP Redirect follows\r\n"
1681 /* XXX: incorrect mime type ? */
1682 "Content-type: application/x-rtsp\r\n"
1683 "\r\n"
1684 "rtsp://%s:%d/%s\r\n", hostname, ntohs(my_rtsp_addr.sin_port), filename);
1685 }
1686 break;
1687 case REDIR_SDP:
1688 {
1689 uint8_t *sdp_data;
1690 int sdp_data_size, len;
1691 struct sockaddr_in my_addr;
1692
1693 q += snprintf(q, c->buffer_size,
1694 "HTTP/1.0 200 OK\r\n"
1695 "Content-type: application/sdp\r\n"
1696 "\r\n");
1697
1698 len = sizeof(my_addr);
1699 getsockname(c->fd, (struct sockaddr *)&my_addr, &len);
1700
1701 /* XXX: should use a dynamic buffer */
1702 sdp_data_size = prepare_sdp_description(stream,
1703 &sdp_data,
1704 my_addr.sin_addr);
1705 if (sdp_data_size > 0) {
1706 memcpy(q, sdp_data, sdp_data_size);
1707 q += sdp_data_size;
1708 *q = '\0';
1709 av_free(sdp_data);
1710 }
1711 }
1712 break;
1713 default:
1714 abort();
1715 break;
1716 }
1717
1718 /* prepare output buffer */
1719 c->buffer_ptr = c->buffer;
1720 c->buffer_end = q;
1721 c->state = HTTPSTATE_SEND_HEADER;
1722 return 0;
1723 }
1724 }
1725 }
1726
1727 snprintf(msg, sizeof(msg), "ASX/RAM file not handled");
1728 goto send_error;
1729 }
1730
1731 stream->conns_served++;
1732
1733 /* XXX: add there authenticate and IP match */
1734
1735 if (c->post) {
1736 /* if post, it means a feed is being sent */
1737 if (!stream->is_feed) {
1738 /* However it might be a status report from WMP! Let us log the
1739 * data as it might come in handy one day. */
1740 char *logline = 0;
1741 int client_id = 0;
1742
1743 for (p = c->buffer; *p && *p != '\r' && *p != '\n'; ) {
1744 if (av_strncasecmp(p, "Pragma: log-line=", 17) == 0) {
1745 logline = p;
1746 break;
1747 }
1748 if (av_strncasecmp(p, "Pragma: client-id=", 18) == 0)
1749 client_id = strtol(p + 18, 0, 10);
1750 p = strchr(p, '\n');
1751 if (!p)
1752 break;
1753
1754 p++;
1755 }
1756
1757 if (logline) {
1758 char *eol = strchr(logline, '\n');
1759
1760 logline += 17;
1761
1762 if (eol) {
1763 if (eol[-1] == '\r')
1764 eol--;
1765 http_log("%.*s\n", (int) (eol - logline), logline);
1766 c->suppress_log = 1;
1767 }
1768 }
1769
1770 #ifdef DEBUG
1771 http_log("\nGot request:\n%s\n", c->buffer);
1772 #endif
1773
1774 if (client_id && extract_rates(ratebuf, sizeof(ratebuf), c->buffer)) {
1775 HTTPContext *wmpc;
1776
1777 /* Now we have to find the client_id */
1778 for (wmpc = first_http_ctx; wmpc; wmpc = wmpc->next) {
1779 if (wmpc->wmp_client_id == client_id)
1780 break;
1781 }
1782
1783 if (wmpc && modify_current_stream(wmpc, ratebuf))
1784 wmpc->switch_pending = 1;
1785 }
1786
1787 snprintf(msg, sizeof(msg), "POST command not handled");
1788 c->stream = 0;
1789 goto send_error;
1790 }
1791 if (http_start_receive_data(c) < 0) {
1792 snprintf(msg, sizeof(msg), "could not open feed");
1793 goto send_error;
1794 }
1795 c->http_error = 0;
1796 c->state = HTTPSTATE_RECEIVE_DATA;
1797 return 0;
1798 }
1799
1800 #ifdef DEBUG
1801 if (strcmp(stream->filename + strlen(stream->filename) - 4, ".asf") == 0)
1802 http_log("\nGot request:\n%s\n", c->buffer);
1803 #endif
1804
1805 if (c->stream->stream_type == STREAM_TYPE_STATUS)
1806 goto send_status;
1807
1808 /* open input stream */
1809 if (open_input_stream(c, info) < 0) {
1810 snprintf(msg, sizeof(msg), "Input stream corresponding to '%s' not found", url);
1811 goto send_error;
1812 }
1813
1814 /* prepare http header */
1815 q = c->buffer;
1816 q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "HTTP/1.0 200 OK\r\n");
1817 mime_type = c->stream->fmt->mime_type;
1818 if (!mime_type)
1819 mime_type = "application/x-octet-stream";
1820 q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Pragma: no-cache\r\n");
1821
1822 /* for asf, we need extra headers */
1823 if (!strcmp(c->stream->fmt->name,"asf_stream")) {
1824 /* Need to allocate a client id */
1825
1826 c->wmp_client_id = av_lfg_get(&random_state);
1827
1828 q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Server: Cougar 4.1.0.3923\r\nCache-Control: no-cache\r\nPragma: client-id=%d\r\nPragma: features=\"broadcast\"\r\n", c->wmp_client_id);
1829 }
1830 q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "Content-Type: %s\r\n", mime_type);
1831 q += snprintf(q, q - (char *) c->buffer + c->buffer_size, "\r\n");
1832
1833 /* prepare output buffer */
1834 c->http_error = 0;
1835 c->buffer_ptr = c->buffer;
1836 c->buffer_end = q;
1837 c->state = HTTPSTATE_SEND_HEADER;
1838 return 0;
1839 send_error:
1840 c->http_error = 404;
1841 q = c->buffer;
1842 q += snprintf(q, c->buffer_size,
1843 "HTTP/1.0 404 Not Found\r\n"
1844 "Content-type: text/html\r\n"
1845 "\r\n"
1846 "<html>\n"
1847 "<head><title>404 Not Found</title></head>\n"
1848 "<body>%s</body>\n"
1849 "</html>\n", msg);
1850 /* prepare output buffer */
1851 c->buffer_ptr = c->buffer;
1852 c->buffer_end = q;
1853 c->state = HTTPSTATE_SEND_HEADER;
1854 return 0;
1855 send_status:
1856 compute_status(c);
1857 c->http_error = 200; /* horrible : we use this value to avoid
1858 going to the send data state */
1859 c->state = HTTPSTATE_SEND_HEADER;
1860 return 0;
1861 }
1862
1863 static void fmt_bytecount(AVIOContext *pb, int64_t count)
1864 {
1865 static const char *suffix = " kMGTP";
1866 const char *s;
1867
1868 for (s = suffix; count >= 100000 && s[1]; count /= 1000, s++);
1869
1870 avio_printf(pb, "%"PRId64"%c", count, *s);
1871 }
1872
1873 static void compute_status(HTTPContext *c)
1874 {
1875 HTTPContext *c1;
1876 FFStream *stream;
1877 char *p;
1878 time_t ti;
1879 int i, len;
1880 AVIOContext *pb;
1881
1882 if (avio_open_dyn_buf(&pb) < 0) {
1883 /* XXX: return an error ? */
1884 c->buffer_ptr = c->buffer;
1885 c->buffer_end = c->buffer;
1886 return;
1887 }
1888
1889 avio_printf(pb, "HTTP/1.0 200 OK\r\n");
1890 avio_printf(pb, "Content-type: %s\r\n", "text/html");
1891 avio_printf(pb, "Pragma: no-cache\r\n");
1892 avio_printf(pb, "\r\n");
1893
1894 avio_printf(pb, "<html><head><title>%s Status</title>\n", program_name);
1895 if (c->stream->feed_filename[0])
1896 avio_printf(pb, "<link rel=\"shortcut icon\" href=\"%s\">\n", c->stream->feed_filename);
1897 avio_printf(pb, "</head>\n<body>");
1898 avio_printf(pb, "<h1>%s Status</h1>\n", program_name);
1899 /* format status */
1900 avio_printf(pb, "<h2>Available Streams</h2>\n");
1901 avio_printf(pb, "<table cellspacing=0 cellpadding=4>\n");
1902 avio_printf(pb, "<tr><th valign=top>Path<th align=left>Served<br>Conns<th><br>bytes<th valign=top>Format<th>Bit rate<br>kbits/s<th align=left>Video<br>kbits/s<th><br>Codec<th align=left>Audio<br>kbits/s<th><br>Codec<th align=left valign=top>Feed\n");
1903 stream = first_stream;
1904 while (stream != NULL) {
1905 char sfilename[1024];
1906 char *eosf;
1907
1908 if (stream->feed != stream) {
1909 av_strlcpy(sfilename, stream->filename, sizeof(sfilename) - 10);
1910 eosf = sfilename + strlen(sfilename);
1911 if (eosf - sfilename >= 4) {
1912 if (strcmp(eosf - 4, ".asf") == 0)
1913 strcpy(eosf - 4, ".asx");
1914 else if (strcmp(eosf - 3, ".rm") == 0)
1915 strcpy(eosf - 3, ".ram");
1916 else if (stream->fmt && !strcmp(stream->fmt->name, "rtp")) {
1917 /* generate a sample RTSP director if
1918 unicast. Generate an SDP redirector if
1919 multicast */
1920 eosf = strrchr(sfilename, '.');
1921 if (!eosf)
1922 eosf = sfilename + strlen(sfilename);
1923 if (stream->is_multicast)
1924 strcpy(eosf, ".sdp");
1925 else
1926 strcpy(eosf, ".rtsp");
1927 }
1928 }
1929
1930 avio_printf(pb, "<tr><td><a href=\"/%s\">%s</a> ",
1931 sfilename, stream->filename);
1932 avio_printf(pb, "<td align=right> %d <td align=right> ",
1933 stream->conns_served);
1934 fmt_bytecount(pb, stream->bytes_served);
1935 switch(stream->stream_type) {
1936 case STREAM_TYPE_LIVE: {
1937 int audio_bit_rate = 0;
1938 int video_bit_rate = 0;
1939 const char *audio_codec_name = "";
1940 const char *video_codec_name = "";
1941 const char *audio_codec_name_extra = "";
1942 const char *video_codec_name_extra = "";
1943
1944 for(i=0;i<stream->nb_streams;i++) {
1945 AVStream *st = stream->streams[i];
1946 AVCodec *codec = avcodec_find_encoder(st->codec->codec_id);
1947 switch(st->codec->codec_type) {
1948 case AVMEDIA_TYPE_AUDIO:
1949 audio_bit_rate += st->codec->bit_rate;
1950 if (codec) {
1951 if (*audio_codec_name)
1952 audio_codec_name_extra = "...";
1953 audio_codec_name = codec->name;
1954 }
1955 break;
1956 case AVMEDIA_TYPE_VIDEO:
1957 video_bit_rate += st->codec->bit_rate;
1958 if (codec) {
1959 if (*video_codec_name)
1960 video_codec_name_extra = "...";
1961 video_codec_name = codec->name;
1962 }
1963 break;
1964 case AVMEDIA_TYPE_DATA:
1965 video_bit_rate += st->codec->bit_rate;
1966 break;
1967 default:
1968 abort();
1969 }
1970 }
1971 avio_printf(pb, "<td align=center> %s <td align=right> %d <td align=right> %d <td> %s %s <td align=right> %d <td> %s %s",
1972 stream->fmt->name,
1973 stream->bandwidth,
1974 video_bit_rate / 1000, video_codec_name, video_codec_name_extra,
1975 audio_bit_rate / 1000, audio_codec_name, audio_codec_name_extra);
1976 if (stream->feed)
1977 avio_printf(pb, "<td>%s", stream->feed->filename);
1978 else
1979 avio_printf(pb, "<td>%s", stream->feed_filename);
1980 avio_printf(pb, "\n");
1981 }
1982 break;
1983 default:
1984 avio_printf(pb, "<td align=center> - <td align=right> - <td align=right> - <td><td align=right> - <td>\n");
1985 break;
1986 }
1987 }
1988 stream = stream->next;
1989 }
1990 avio_printf(pb, "</table>\n");
1991
1992 stream = first_stream;
1993 while (stream != NULL) {
1994 if (stream->feed == stream) {
1995 avio_printf(pb, "<h2>Feed %s</h2>", stream->filename);
1996 if (stream->pid) {
1997 avio_printf(pb, "Running as pid %d.\n", stream->pid);
1998
1999 #if defined(linux) && !defined(CONFIG_NOCUTILS)
2000 {
2001 FILE *pid_stat;
2002 char ps_cmd[64];
2003
2004 /* This is somewhat linux specific I guess */
2005 snprintf(ps_cmd, sizeof(ps_cmd),
2006 "ps -o \"%%cpu,cputime\" --no-headers %d",
2007 stream->pid);
2008
2009 pid_stat = popen(ps_cmd, "r");
2010 if (pid_stat) {
2011 char cpuperc[10];
2012 char cpuused[64];
2013
2014 if (fscanf(pid_stat, "%10s %64s", cpuperc,
2015 cpuused) == 2) {
2016 avio_printf(pb, "Currently using %s%% of the cpu. Total time used %s.\n",
2017 cpuperc, cpuused);
2018 }
2019 fclose(pid_stat);
2020 }
2021 }
2022 #endif
2023
2024 avio_printf(pb, "<p>");
2025 }
2026 avio_printf(pb, "<table cellspacing=0 cellpadding=4><tr><th>Stream<th>type<th>kbits/s<th align=left>codec<th align=left>Parameters\n");
2027
2028 for (i = 0; i < stream->nb_streams; i++) {
2029 AVStream *st = stream->streams[i];
2030 AVCodec *codec = avcodec_find_encoder(st->codec->codec_id);
2031 const char *type = "unknown";
2032 char parameters[64];
2033
2034 parameters[0] = 0;
2035
2036 switch(st->codec->codec_type) {
2037 case AVMEDIA_TYPE_AUDIO:
2038 type = "audio";
2039 snprintf(parameters, sizeof(parameters), "%d channel(s), %d Hz", st->codec->channels, st->codec->sample_rate);
2040 break;
2041 case AVMEDIA_TYPE_VIDEO:
2042 type = "video";
2043 snprintf(parameters, sizeof(parameters), "%dx%d, q=%d-%d, fps=%d", st->codec->width, st->codec->height,
2044 st->codec->qmin, st->codec->qmax, st->codec->time_base.den / st->codec->time_base.num);
2045 break;
2046 default:
2047 abort();
2048 }
2049 avio_printf(pb, "<tr><td align=right>%d<td>%s<td align=right>%d<td>%s<td>%s\n",
2050 i, type, st->codec->bit_rate/1000, codec ? codec->name : "", parameters);
2051 }
2052 avio_printf(pb, "</table>\n");
2053
2054 }
2055 stream = stream->next;
2056 }
2057
2058 /* connection status */
2059 avio_printf(pb, "<h2>Connection Status</h2>\n");
2060
2061 avio_printf(pb, "Number of connections: %d / %d<br>\n",
2062 nb_connections, nb_max_connections);
2063
2064 avio_printf(pb, "Bandwidth in use: %"PRIu64"k / %"PRIu64"k<br>\n",
2065 current_bandwidth, max_bandwidth);
2066
2067 avio_printf(pb, "<table>\n");
2068 avio_printf(pb, "<tr><th>#<th>File<th>IP<th>Proto<th>State<th>Target bits/sec<th>Actual bits/sec<th>Bytes transferred\n");
2069 c1 = first_http_ctx;
2070 i = 0;
2071 while (c1 != NULL) {
2072 int bitrate;
2073 int j;
2074
2075 bitrate = 0;
2076 if (c1->stream) {
2077 for (j = 0; j < c1->stream->nb_streams; j++) {
2078 if (!c1->stream->feed)
2079 bitrate += c1->stream->streams[j]->codec->bit_rate;
2080 else if (c1->feed_streams[j] >= 0)
2081 bitrate += c1->stream->feed->streams[c1->feed_streams[j]]->codec->bit_rate;
2082 }
2083 }
2084
2085 i++;
2086 p = inet_ntoa(c1->from_addr.sin_addr);
2087 avio_printf(pb, "<tr><td><b>%d</b><td>%s%s<td>%s<td>%s<td>%s<td align=right>",
2088 i,
2089 c1->stream ? c1->stream->filename : "",
2090 c1->state == HTTPSTATE_RECEIVE_DATA ? "(input)" : "",
2091 p,
2092 c1->protocol,
2093 http_state[c1->state]);
2094 fmt_bytecount(pb, bitrate);
2095 avio_printf(pb, "<td align=right>");
2096 fmt_bytecount(pb, compute_datarate(&c1->datarate, c1->data_count) * 8);
2097 avio_printf(pb, "<td align=right>");
2098 fmt_bytecount(pb, c1->data_count);
2099 avio_printf(pb, "\n");
2100 c1 = c1->next;
2101 }
2102 avio_printf(pb, "</table>\n");
2103
2104 /* date */
2105 ti = time(NULL);
2106 p = ctime(&ti);
2107 avio_printf(pb, "<hr size=1 noshade>Generated at %s", p);
2108 avio_printf(pb, "</body>\n</html>\n");
2109
2110 len = avio_close_dyn_buf(pb, &c->pb_buffer);
2111 c->buffer_ptr = c->pb_buffer;
2112 c->buffer_end = c->pb_buffer + len;
2113 }
2114
2115 /* check if the parser needs to be opened for stream i */
2116 static void open_parser(AVFormatContext *s, int i)
2117 {
2118 AVStream *st = s->streams[i];
2119 AVCodec *codec;
2120
2121 if (!st->codec->codec) {
2122 codec = avcodec_find_decoder(st->codec->codec_id);
2123 if (codec && (codec->capabilities & CODEC_CAP_PARSE_ONLY)) {
2124 st->codec->parse_only = 1;
2125 if (avcodec_open2(st->codec, codec, NULL) < 0)
2126 st->codec->parse_only = 0;
2127 }
2128 }
2129 }
2130
2131 static int open_input_stream(HTTPContext *c, const char *info)
2132 {
2133 char buf[128];
2134 char input_filename[1024];
2135 AVFormatContext *s = NULL;
2136 int i, ret;
2137 int64_t stream_pos;
2138
2139 /* find file name */
2140 if (c->stream->feed) {
2141 strcpy(input_filename, c->stream->feed->feed_filename);
2142 /* compute position (absolute time) */
2143 if (av_find_info_tag(buf, sizeof(buf), "date", info)) {
2144 if ((ret = av_parse_time(&stream_pos, buf, 0)) < 0)
2145 return ret;
2146 } else if (av_find_info_tag(buf, sizeof(buf), "buffer", info)) {
2147 int prebuffer = strtol(buf, 0, 10);
2148 stream_pos = av_gettime() - prebuffer * (int64_t)1000000;
2149 } else
2150 stream_pos = av_gettime() - c->stream->prebuffer * (int64_t)1000;
2151 } else {
2152 strcpy(input_filename, c->stream->feed_filename);
2153 /* compute position (relative time) */
2154 if (av_find_info_tag(buf, sizeof(buf), "date", info)) {
2155 if ((ret = av_parse_time(&stream_pos, buf, 1)) < 0)
2156 return ret;
2157 } else
2158 stream_pos = 0;
2159 }
2160 if (input_filename[0] == '\0')
2161 return -1;
2162
2163 /* open stream */
2164 if ((ret = avformat_open_input(&s, input_filename, c->stream->ifmt, &c->stream->in_opts)) < 0) {
2165 http_log("could not open %s: %d\n", input_filename, ret);
2166 return -1;
2167 }
2168 s->flags |= AVFMT_FLAG_GENPTS;
2169 c->fmt_in = s;
2170 if (strcmp(s->iformat->name, "ffm") && avformat_find_stream_info(c->fmt_in, NULL) < 0) {
2171 http_log("Could not find stream info '%s'\n", input_filename);
2172 avformat_close_input(&s);
2173 return -1;
2174 }
2175
2176 /* open each parser */
2177 for(i=0;i<s->nb_streams;i++)
2178 open_parser(s, i);
2179
2180 /* choose stream as clock source (we favorize video stream if
2181 present) for packet sending */
2182 c->pts_stream_index = 0;
2183 for(i=0;i<c->stream->nb_streams;i++) {
2184 if (c->pts_stream_index == 0 &&
2185 c->stream->streams[i]->codec->codec_type == AVMEDIA_TYPE_VIDEO) {
2186 c->pts_stream_index = i;
2187 }
2188 }
2189
2190 if (c->fmt_in->iformat->read_seek)
2191 av_seek_frame(c->fmt_in, -1, stream_pos, 0);
2192 /* set the start time (needed for maxtime and RTP packet timing) */
2193 c->start_time = cur_time;
2194 c->first_pts = AV_NOPTS_VALUE;
2195 return 0;
2196 }
2197
2198 /* return the server clock (in us) */
2199 static int64_t get_server_clock(HTTPContext *c)
2200 {
2201 /* compute current pts value from system time */
2202 return (cur_time - c->start_time) * 1000;
2203 }
2204
2205 /* return the estimated time at which the current packet must be sent
2206 (in us) */
2207 static int64_t get_packet_send_clock(HTTPContext *c)
2208 {
2209 int bytes_left, bytes_sent, frame_bytes;
2210
2211 frame_bytes = c->cur_frame_bytes;
2212 if (frame_bytes <= 0)
2213 return c->cur_pts;
2214 else {
2215 bytes_left = c->buffer_end - c->buffer_ptr;
2216 bytes_sent = frame_bytes - bytes_left;
2217 return c->cur_pts + (c->cur_frame_duration * bytes_sent) / frame_bytes;
2218 }
2219 }
2220
2221
2222 static int http_prepare_data(HTTPContext *c)
2223 {
2224 int i, len, ret;
2225 AVFormatContext *ctx;
2226
2227 av_freep(&c->pb_buffer);
2228 switch(c->state) {
2229 case HTTPSTATE_SEND_DATA_HEADER:
2230 memset(&c->fmt_ctx, 0, sizeof(c->fmt_ctx));
2231 av_dict_set(&c->fmt_ctx.metadata, "author" , c->stream->author , 0);
2232 av_dict_set(&c->fmt_ctx.metadata, "comment" , c->stream->comment , 0);
2233 av_dict_set(&c->fmt_ctx.metadata, "copyright", c->stream->copyright, 0);
2234 av_dict_set(&c->fmt_ctx.metadata, "title" , c->stream->title , 0);
2235
2236 c->fmt_ctx.streams = av_mallocz(sizeof(AVStream *) * c->stream->nb_streams);
2237
2238 for(i=0;i<c->stream->nb_streams;i++) {
2239 AVStream *src;
2240 c->fmt_ctx.streams[i] = av_mallocz(sizeof(AVStream));
2241 /* if file or feed, then just take streams from FFStream struct */
2242 if (!c->stream->feed ||
2243 c->stream->feed == c->stream)
2244 src = c->stream->streams[i];
2245 else
2246 src = c->stream->feed->streams[c->stream->feed_streams[i]];
2247
2248 *(c->fmt_ctx.streams[i]) = *src;
2249 c->fmt_ctx.streams[i]->priv_data = 0;
2250 c->fmt_ctx.streams[i]->codec->frame_number = 0; /* XXX: should be done in
2251 AVStream, not in codec */
2252 }
2253 /* set output format parameters */
2254 c->fmt_ctx.oformat = c->stream->fmt;
2255 c->fmt_ctx.nb_streams = c->stream->nb_streams;
2256
2257 c->got_key_frame = 0;
2258
2259 /* prepare header and save header data in a stream */
2260 if (avio_open_dyn_buf(&c->fmt_ctx.pb) < 0) {
2261 /* XXX: potential leak */
2262 return -1;
2263 }
2264 c->fmt_ctx.pb->seekable = 0;
2265
2266 /*
2267 * HACK to avoid mpeg ps muxer to spit many underflow errors
2268 * Default value from Libav
2269 * Try to set it use configuration option
2270 */
2271 c->fmt_ctx.preload = (int)(0.5*AV_TIME_BASE);
2272 c->fmt_ctx.max_delay = (int)(0.7*AV_TIME_BASE);
2273
2274 if (avformat_write_header(&c->fmt_ctx, NULL) < 0) {
2275 http_log("Error writing output header\n");
2276 return -1;
2277 }
2278 av_dict_free(&c->fmt_ctx.metadata);
2279
2280 len = avio_close_dyn_buf(c->fmt_ctx.pb, &c->pb_buffer);
2281 c->buffer_ptr = c->pb_buffer;
2282 c->buffer_end = c->pb_buffer + len;
2283
2284 c->state = HTTPSTATE_SEND_DATA;
2285 c->last_packet_sent = 0;
2286 break;
2287 case HTTPSTATE_SEND_DATA:
2288 /* find a new packet */
2289 /* read a packet from the input stream */
2290 if (c->stream->feed)
2291 ffm_set_write_index(c->fmt_in,
2292 c->stream->feed->feed_write_index,
2293 c->stream->feed->feed_size);
2294
2295 if (c->stream->max_time &&
2296 c->stream->max_time + c->start_time - cur_time < 0)
2297 /* We have timed out */
2298 c->state = HTTPSTATE_SEND_DATA_TRAILER;
2299 else {
2300 AVPacket pkt;
2301 redo:
2302 ret = av_read_frame(c->fmt_in, &pkt);
2303 if (ret < 0) {
2304 if (c->stream->feed) {
2305 /* if coming from feed, it means we reached the end of the
2306 ffm file, so must wait for more data */
2307 c->state = HTTPSTATE_WAIT_FEED;
2308 return 1; /* state changed */
2309 } else if (ret == AVERROR(EAGAIN)) {
2310 /* input not ready, come back later */
2311 return 0;
2312 } else {
2313 if (c->stream->loop) {
2314 avformat_close_input(&c->fmt_in);
2315 if (open_input_stream(c, "") < 0)
2316 goto no_loop;
2317 goto redo;
2318 } else {
2319 no_loop:
2320 /* must send trailer now because eof or error */
2321 c->state = HTTPSTATE_SEND_DATA_TRAILER;
2322 }
2323 }
2324 } else {
2325 int source_index = pkt.stream_index;
2326 /* update first pts if needed */
2327 if (c->first_pts == AV_NOPTS_VALUE) {
2328 c->first_pts = av_rescale_q(pkt.dts, c->fmt_in->streams[pkt.stream_index]->time_base, AV_TIME_BASE_Q);
2329 c->start_time = cur_time;
2330 }
2331 /* send it to the appropriate stream */
2332 if (c->stream->feed) {
2333 /* if coming from a feed, select the right stream */
2334 if (c->switch_pending) {
2335 c->switch_pending = 0;
2336 for(i=0;i<c->stream->nb_streams;i++) {
2337 if (c->switch_feed_streams[i] == pkt.stream_index)
2338 if (pkt.flags & AV_PKT_FLAG_KEY)
2339 c->switch_feed_streams[i] = -1;
2340 if (c->switch_feed_streams[i] >= 0)
2341 c->switch_pending = 1;
2342 }
2343 }
2344 for(i=0;i<c->stream->nb_streams;i++) {
2345 if (c->stream->feed_streams[i] == pkt.stream_index) {
2346 AVStream *st = c->fmt_in->streams[source_index];
2347 pkt.stream_index = i;
2348 if (pkt.flags & AV_PKT_FLAG_KEY &&
2349 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO ||
2350 c->stream->nb_streams == 1))
2351 c->got_key_frame = 1;
2352 if (!c->stream->send_on_key || c->got_key_frame)
2353 goto send_it;
2354 }
2355 }
2356 } else {
2357 AVCodecContext *codec;
2358 AVStream *ist, *ost;
2359 send_it:
2360 ist = c->fmt_in->streams[source_index];
2361 /* specific handling for RTP: we use several
2362 output stream (one for each RTP
2363 connection). XXX: need more abstract handling */
2364 if (c->is_packetized) {
2365 /* compute send time and duration */
2366 c->cur_pts = av_rescale_q(pkt.dts, ist->time_base, AV_TIME_BASE_Q);
2367 c->cur_pts -= c->first_pts;
2368 c->cur_frame_duration = av_rescale_q(pkt.duration, ist->time_base, AV_TIME_BASE_Q);
2369 /* find RTP context */
2370 c->packet_stream_index = pkt.stream_index;
2371 ctx = c->rtp_ctx[c->packet_stream_index];
2372 if(!ctx) {
2373 av_free_packet(&pkt);
2374 break;
2375 }
2376 codec = ctx->streams[0]->codec;
2377 /* only one stream per RTP connection */
2378 pkt.stream_index = 0;
2379 } else {
2380 ctx = &c->fmt_ctx;
2381 /* Fudge here */
2382 codec = ctx->streams[pkt.stream_index]->codec;
2383 }
2384
2385 if (c->is_packetized) {
2386 int max_packet_size;
2387 if (c->rtp_protocol == RTSP_LOWER_TRANSPORT_TCP)
2388 max_packet_size = RTSP_TCP_MAX_PACKET_SIZE;
2389 else
2390 max_packet_size = url_get_max_packet_size(c->rtp_handles[c->packet_stream_index]);
2391 ret = ffio_open_dyn_packet_buf(&ctx->pb, max_packet_size);
2392 } else {
2393 ret = avio_open_dyn_buf(&ctx->pb);
2394 }
2395 if (ret < 0) {
2396 /* XXX: potential leak */
2397 return -1;
2398 }
2399 ost = ctx->streams[pkt.stream_index];
2400
2401 ctx->pb->seekable = 0;
2402 if (pkt.dts != AV_NOPTS_VALUE)
2403 pkt.dts = av_rescale_q(pkt.dts, ist->time_base, ost->time_base);
2404 if (pkt.pts != AV_NOPTS_VALUE)
2405 pkt.pts = av_rescale_q(pkt.pts, ist->time_base, ost->time_base);
2406 pkt.duration = av_rescale_q(pkt.duration, ist->time_base, ost->time_base);
2407 if (av_write_frame(ctx, &pkt) < 0) {
2408 http_log("Error writing frame to output\n");
2409 c->state = HTTPSTATE_SEND_DATA_TRAILER;
2410 }
2411
2412 len = avio_close_dyn_buf(ctx->pb, &c->pb_buffer);
2413 c->cur_frame_bytes = len;
2414 c->buffer_ptr = c->pb_buffer;
2415 c->buffer_end = c->pb_buffer + len;
2416
2417 codec->frame_number++;
2418 if (len == 0) {
2419 av_free_packet(&pkt);
2420 goto redo;
2421 }
2422 }
2423 av_free_packet(&pkt);
2424 }
2425 }
2426 break;
2427 default:
2428 case HTTPSTATE_SEND_DATA_TRAILER:
2429 /* last packet test ? */
2430 if (c->last_packet_sent || c->is_packetized)
2431 return -1;
2432 ctx = &c->fmt_ctx;
2433 /* prepare header */
2434 if (avio_open_dyn_buf(&ctx->pb) < 0) {
2435 /* XXX: potential leak */
2436 return -1;
2437 }
2438 c->fmt_ctx.pb->seekable = 0;
2439 av_write_trailer(ctx);
2440 len = avio_close_dyn_buf(ctx->pb, &c->pb_buffer);
2441 c->buffer_ptr = c->pb_buffer;
2442 c->buffer_end = c->pb_buffer + len;
2443
2444 c->last_packet_sent = 1;
2445 break;
2446 }
2447 return 0;
2448 }
2449
2450 /* should convert the format at the same time */
2451 /* send data starting at c->buffer_ptr to the output connection
2452 (either UDP or TCP connection) */
2453 static int http_send_data(HTTPContext *c)
2454 {
2455 int len, ret;
2456
2457 for(;;) {
2458 if (c->buffer_ptr >= c->buffer_end) {
2459 ret = http_prepare_data(c);
2460 if (ret < 0)
2461 return -1;
2462 else if (ret != 0)
2463 /* state change requested */
2464 break;
2465 } else {
2466 if (c->is_packetized) {
2467 /* RTP data output */
2468 len = c->buffer_end - c->buffer_ptr;
2469 if (len < 4) {
2470 /* fail safe - should never happen */
2471 fail1:
2472 c->buffer_ptr = c->buffer_end;
2473 return 0;
2474 }
2475 len = (c->buffer_ptr[0] << 24) |
2476 (c->buffer_ptr[1] << 16) |
2477 (c->buffer_ptr[2] << 8) |
2478 (c->buffer_ptr[3]);
2479 if (len > (c->buffer_end - c->buffer_ptr))
2480 goto fail1;
2481 if ((get_packet_send_clock(c) - get_server_clock(c)) > 0) {
2482 /* nothing to send yet: we can wait */
2483 return 0;
2484 }
2485
2486 c->data_count += len;
2487 update_datarate(&c->datarate, c->data_count);
2488 if (c->stream)
2489 c->stream->bytes_served += len;
2490
2491 if (c->rtp_protocol == RTSP_LOWER_TRANSPORT_TCP) {
2492 /* RTP packets are sent inside the RTSP TCP connection */
2493 AVIOContext *pb;
2494 int interleaved_index, size;
2495 uint8_t header[4];
2496 HTTPContext *rtsp_c;
2497
2498 rtsp_c = c->rtsp_c;
2499 /* if no RTSP connection left, error */
2500 if (!rtsp_c)
2501 return -1;
2502 /* if already sending something, then wait. */
2503 if (rtsp_c->state != RTSPSTATE_WAIT_REQUEST)
2504 break;
2505 if (avio_open_dyn_buf(&pb) < 0)
2506 goto fail1;
2507 interleaved_index = c->packet_stream_index * 2;
2508 /* RTCP packets are sent at odd indexes */
2509 if (c->buffer_ptr[1] == 200)
2510 interleaved_index++;
2511 /* write RTSP TCP header */
2512 header[0] = '$';
2513 header[1] = interleaved_index;
2514 header[2] = len >> 8;
2515 header[3] = len;
2516 avio_write(pb, header, 4);
2517 /* write RTP packet data */
2518 c->buffer_ptr += 4;
2519 avio_write(pb, c->buffer_ptr, len);
2520 size = avio_close_dyn_buf(pb, &c->packet_buffer);
2521 /* prepare asynchronous TCP sending */
2522 rtsp_c->packet_buffer_ptr = c->packet_buffer;
2523 rtsp_c->packet_buffer_end = c->packet_buffer + size;
2524 c->buffer_ptr += len;
2525
2526 /* send everything we can NOW */
2527 len = send(rtsp_c->fd, rtsp_c->packet_buffer_ptr,
2528 rtsp_c->packet_buffer_end - rtsp_c->packet_buffer_ptr, 0);
2529 if (len > 0)
2530 rtsp_c->packet_buffer_ptr += len;
2531 if (rtsp_c->packet_buffer_ptr < rtsp_c->packet_buffer_end) {
2532 /* if we could not send all the data, we will
2533 send it later, so a new state is needed to
2534 "lock" the RTSP TCP connection */
2535 rtsp_c->state = RTSPSTATE_SEND_PACKET;
2536 break;
2537 } else
2538 /* all data has been sent */
2539 av_freep(&c->packet_buffer);
2540 } else {
2541 /* send RTP packet directly in UDP */
2542 c->buffer_ptr += 4;
2543 url_write(c->rtp_handles[c->packet_stream_index],
2544 c->buffer_ptr, len);
2545 c->buffer_ptr += len;
2546 /* here we continue as we can send several packets per 10 ms slot */
2547 }
2548 } else {
2549 /* TCP data output */
2550 len = send(c->fd, c->buffer_ptr, c->buffer_end - c->buffer_ptr, 0);
2551 if (len < 0) {
2552 if (ff_neterrno() != AVERROR(EAGAIN) &&
2553 ff_neterrno() != AVERROR(EINTR))
2554 /* error : close connection */
2555 return -1;
2556 else
2557 return 0;
2558 } else
2559 c->buffer_ptr += len;
2560
2561 c->data_count += len;
2562 update_datarate(&c->datarate, c->data_count);
2563 if (c->stream)
2564 c->stream->bytes_served += len;
2565 break;
2566 }
2567 }
2568 } /* for(;;) */
2569 return 0;
2570 }
2571
2572 static int http_start_receive_data(HTTPContext *c)
2573 {
2574 int fd;
2575
2576 if (c->stream->feed_opened)
2577 return -1;
2578
2579 /* Don't permit writing to this one */
2580 if (c->stream->readonly)
2581 return -1;
2582
2583 /* open feed */
2584 fd = open(c->stream->feed_filename, O_RDWR);
2585 if (fd < 0) {
2586 http_log("Error opening feeder file: %s\n", strerror(errno));
2587 return -1;
2588 }
2589 c->feed_fd = fd;
2590
2591 if (c->stream->truncate) {
2592 /* truncate feed file */
2593 ffm_write_write_index(c->feed_fd, FFM_PACKET_SIZE);
2594 ftruncate(c->feed_fd, FFM_PACKET_SIZE);
2595 http_log("Truncating feed file '%s'\n", c->stream->feed_filename);
2596 } else {
2597 if ((c->stream->feed_write_index = ffm_read_write_index(fd)) < 0) {
2598 http_log("Error reading write index from feed file: %s\n", strerror(errno));
2599 return -1;
2600 }
2601 }
2602
2603 c->stream->feed_write_index = FFMAX(ffm_read_write_index(fd), FFM_PACKET_SIZE);
2604 c->stream->feed_size = lseek(fd, 0, SEEK_END);
2605 lseek(fd, 0, SEEK_SET);
2606
2607 /* init buffer input */
2608 c->buffer_ptr = c->buffer;
2609 c->buffer_end = c->buffer + FFM_PACKET_SIZE;
2610 c->stream->feed_opened = 1;
2611 c->chunked_encoding = !!av_stristr(c->buffer, "Transfer-Encoding: chunked");
2612 return 0;
2613 }
2614
2615 static int http_receive_data(HTTPContext *c)
2616 {
2617 HTTPContext *c1;
2618 int len, loop_run = 0;
2619
2620 while (c->chunked_encoding && !c->chunk_size &&
2621 c->buffer_end > c->buffer_ptr) {
2622 /* read chunk header, if present */
2623 len = recv(c->fd, c->buffer_ptr, 1, 0);
2624
2625 if (len < 0) {
2626 if (ff_neterrno() != AVERROR(EAGAIN) &&
2627 ff_neterrno() != AVERROR(EINTR))
2628 /* error : close connection */
2629 goto fail;
2630 return 0;
2631 } else if (len == 0) {
2632 /* end of connection : close it */
2633 goto fail;
2634 } else if (c->buffer_ptr - c->buffer >= 2 &&
2635 !memcmp(c->buffer_ptr - 1, "\r\n", 2)) {
2636 c->chunk_size = strtol(c->buffer, 0, 16);
2637 if (c->chunk_size == 0) // end of stream
2638 goto fail;
2639 c->buffer_ptr = c->buffer;
2640 break;
2641 } else if (++loop_run > 10) {
2642 /* no chunk header, abort */
2643 goto fail;
2644 } else {
2645 c->buffer_ptr++;
2646 }
2647 }
2648
2649 if (c->buffer_end > c->buffer_ptr) {
2650 len = recv(c->fd, c->buffer_ptr,
2651 FFMIN(c->chunk_size, c->buffer_end - c->buffer_ptr), 0);
2652 if (len < 0) {
2653 if (ff_neterrno() != AVERROR(EAGAIN) &&
2654 ff_neterrno() != AVERROR(EINTR))
2655 /* error : close connection */
2656 goto fail;
2657 } else if (len == 0)
2658 /* end of connection : close it */
2659 goto fail;
2660 else {
2661 c->chunk_size -= len;
2662 c->buffer_ptr += len;
2663 c->data_count += len;
2664 update_datarate(&c->datarate, c->data_count);
2665 }
2666 }
2667
2668 if (c->buffer_ptr - c->buffer >= 2 && c->data_count > FFM_PACKET_SIZE) {
2669 if (c->buffer[0] != 'f' ||
2670 c->buffer[1] != 'm') {
2671 http_log("Feed stream has become desynchronized -- disconnecting\n");
2672 goto fail;
2673 }
2674 }
2675
2676 if (c->buffer_ptr >= c->buffer_end) {
2677 FFStream *feed = c->stream;
2678 /* a packet has been received : write it in the store, except
2679 if header */
2680 if (c->data_count > FFM_PACKET_SIZE) {
2681
2682 // printf("writing pos=0x%"PRIx64" size=0x%"PRIx64"\n", feed->feed_write_index, feed->feed_size);
2683 /* XXX: use llseek or url_seek */
2684 lseek(c->feed_fd, feed->feed_write_index, SEEK_SET);
2685 if (write(c->feed_fd, c->buffer, FFM_PACKET_SIZE) < 0) {
2686 http_log("Error writing to feed file: %s\n", strerror(errno));
2687 goto fail;
2688 }
2689
2690 feed->feed_write_index += FFM_PACKET_SIZE;
2691 /* update file size */
2692 if (feed->feed_write_index > c->stream->feed_size)
2693 feed->feed_size = feed->feed_write_index;
2694
2695 /* handle wrap around if max file size reached */
2696 if (c->stream->feed_max_size && feed->feed_write_index >= c->stream->feed_max_size)
2697 feed->feed_write_index = FFM_PACKET_SIZE;
2698
2699 /* write index */
2700 if (ffm_write_write_index(c->feed_fd, feed->feed_write_index) < 0) {
2701 http_log("Error writing index to feed file: %s\n", strerror(errno));
2702 goto fail;
2703 }
2704
2705 /* wake up any waiting connections */
2706 for(c1 = first_http_ctx; c1 != NULL; c1 = c1->next) {
2707 if (c1->state == HTTPSTATE_WAIT_FEED &&
2708 c1->stream->feed == c->stream->feed)
2709 c1->state = HTTPSTATE_SEND_DATA;
2710 }
2711 } else {
2712 /* We have a header in our hands that contains useful data */
2713 AVFormatContext *s = avformat_alloc_context();
2714 AVIOContext *pb;
2715 AVInputFormat *fmt_in;
2716 int i;
2717
2718 if (!s)
2719 goto fail;
2720
2721 /* use feed output format name to find corresponding input format */
2722 fmt_in = av_find_input_format(feed->fmt->name);
2723 if (!fmt_in)
2724 goto fail;
2725
2726 pb = avio_alloc_context(c->buffer, c->buffer_end - c->buffer,
2727 0, NULL, NULL, NULL, NULL);
2728 pb->seekable = 0;
2729
2730 s->pb = pb;
2731 if (avformat_open_input(&s, c->stream->feed_filename, fmt_in, NULL) < 0) {
2732 av_free(pb);
2733 goto fail;
2734 }
2735
2736 /* Now we have the actual streams */
2737 if (s->nb_streams != feed->nb_streams) {
2738 avformat_close_input(&s);
2739 av_free(pb);
2740 http_log("Feed '%s' stream number does not match registered feed\n",
2741 c->stream->feed_filename);
2742 goto fail;
2743 }
2744
2745 for (i = 0; i < s->nb_streams; i++) {
2746 AVStream *fst = feed->streams[i];
2747 AVStream *st = s->streams[i];
2748 avcodec_copy_context(fst->codec, st->codec);
2749 }
2750
2751 avformat_close_input(&s);
2752 av_free(pb);
2753 }
2754 c->buffer_ptr = c->buffer;
2755 }
2756
2757 return 0;
2758 fail:
2759 c->stream->feed_opened = 0;
2760 close(c->feed_fd);
2761 /* wake up any waiting connections to stop waiting for feed */
2762 for(c1 = first_http_ctx; c1 != NULL; c1 = c1->next) {
2763 if (c1->state == HTTPSTATE_WAIT_FEED &&
2764 c1->stream->feed == c->stream->feed)
2765 c1->state = HTTPSTATE_SEND_DATA_TRAILER;
2766 }
2767 return -1;
2768 }
2769
2770 /********************************************************************/
2771 /* RTSP handling */
2772
2773 static void rtsp_reply_header(HTTPContext *c, enum RTSPStatusCode error_number)
2774 {
2775 const char *str;
2776 time_t ti;
2777 struct tm *tm;
2778 char buf2[32];
2779
2780 switch(error_number) {
2781 case RTSP_STATUS_OK:
2782 str = "OK";
2783 break;
2784 case RTSP_STATUS_METHOD:
2785 str = "Method Not Allowed";
2786 break;
2787 case RTSP_STATUS_BANDWIDTH:
2788 str = "Not Enough Bandwidth";
2789 break;
2790 case RTSP_STATUS_SESSION:
2791 str = "Session Not Found";
2792 break;
2793 case RTSP_STATUS_STATE:
2794 str = "Method Not Valid in This State";
2795 break;
2796 case RTSP_STATUS_AGGREGATE:
2797 str = "Aggregate operation not allowed";
2798 break;
2799 case RTSP_STATUS_ONLY_AGGREGATE:
2800 str = "Only aggregate operation allowed";
2801 break;
2802 case RTSP_STATUS_TRANSPORT:
2803 str = "Unsupported transport";
2804 break;
2805 case RTSP_STATUS_INTERNAL:
2806 str = "Internal Server Error";
2807 break;
2808 case RTSP_STATUS_SERVICE:
2809 str = "Service Unavailable";
2810 break;
2811 case RTSP_STATUS_VERSION:
2812 str = "RTSP Version not supported";
2813 break;
2814 default:
2815 str = "Unknown Error";
2816 break;
2817 }
2818
2819 avio_printf(c->pb, "RTSP/1.0 %d %s\r\n", error_number, str);
2820 avio_printf(c->pb, "CSeq: %d\r\n", c->seq);
2821
2822 /* output GMT time */
2823 ti = time(NULL);
2824 tm = gmtime(&ti);
2825 strftime(buf2, sizeof(buf2), "%a, %d %b %Y %H:%M:%S", tm);
2826 avio_printf(c->pb, "Date: %s GMT\r\n", buf2);
2827 }
2828
2829 static void rtsp_reply_error(HTTPContext *c, enum RTSPStatusCode error_number)
2830 {
2831 rtsp_reply_header(c, error_number);
2832 avio_printf(c->pb, "\r\n");
2833 }
2834
2835 static int rtsp_parse_request(HTTPContext *c)
2836 {
2837 const char *p, *p1, *p2;
2838 char cmd[32];
2839 char url[1024];
2840 char protocol[32];
2841 char line[1024];
2842 int len;
2843 RTSPMessageHeader header1, *header = &header1;
2844
2845 c->buffer_ptr[0] = '\0';
2846 p = c->buffer;
2847
2848 get_word(cmd, sizeof(cmd), &p);
2849 get_word(url, sizeof(url), &p);
2850 get_word(protocol, sizeof(protocol), &p);
2851
2852 av_strlcpy(c->method, cmd, sizeof(c->method));
2853 av_strlcpy(c->url, url, sizeof(c->url));
2854 av_strlcpy(c->protocol, protocol, sizeof(c->protocol));
2855
2856 if (avio_open_dyn_buf(&c->pb) < 0) {
2857 /* XXX: cannot do more */
2858 c->pb = NULL; /* safety */
2859 return -1;
2860 }
2861
2862 /* check version name */
2863 if (strcmp(protocol, "RTSP/1.0") != 0) {
2864 rtsp_reply_error(c, RTSP_STATUS_VERSION);
2865 goto the_end;
2866 }
2867
2868 /* parse each header line */
2869 memset(header, 0, sizeof(*header));
2870 /* skip to next line */
2871 while (*p != '\n' && *p != '\0')
2872 p++;
2873 if (*p == '\n')
2874 p++;
2875 while (*p != '\0') {
2876 p1 = memchr(p, '\n', (char *)c->buffer_ptr - p);
2877 if (!p1)
2878 break;
2879 p2 = p1;
2880 if (p2 > p && p2[-1] == '\r')
2881 p2--;
2882 /* skip empty line */
2883 if (p2 == p)
2884 break;
2885 len = p2 - p;
2886 if (len > sizeof(line) - 1)
2887 len = sizeof(line) - 1;
2888 memcpy(line, p, len);
2889 line[len] = '\0';
2890 ff_rtsp_parse_line(header, line, NULL, NULL);
2891 p = p1 + 1;
2892 }
2893
2894 /* handle sequence number */
2895 c->seq = header->seq;
2896
2897 if (!strcmp(cmd, "DESCRIBE"))
2898 rtsp_cmd_describe(c, url);
2899 else if (!strcmp(cmd, "OPTIONS"))
2900 rtsp_cmd_options(c, url);
2901 else if (!strcmp(cmd, "SETUP"))
2902 rtsp_cmd_setup(c, url, header);
2903 else if (!strcmp(cmd, "PLAY"))
2904 rtsp_cmd_play(c, url, header);
2905 else if (!strcmp(cmd, "PAUSE"))
2906 rtsp_cmd_pause(c, url, header);
2907 else if (!strcmp(cmd, "TEARDOWN"))
2908 rtsp_cmd_teardown(c, url, header);
2909 else
2910 rtsp_reply_error(c, RTSP_STATUS_METHOD);
2911
2912 the_end:
2913 len = avio_close_dyn_buf(c->pb, &c->pb_buffer);
2914 c->pb = NULL; /* safety */
2915 if (len < 0) {
2916 /* XXX: cannot do more */
2917 return -1;
2918 }
2919 c->buffer_ptr = c->pb_buffer;
2920 c->buffer_end = c->pb_buffer + len;
2921 c->state = RTSPSTATE_SEND_REPLY;
2922 return 0;
2923 }
2924
2925 static int prepare_sdp_description(FFStream *stream, uint8_t **pbuffer,
2926 struct in_addr my_ip)
2927 {
2928 AVFormatContext *avc;
2929 AVStream *avs = NULL;
2930 int i;
2931
2932 avc = avformat_alloc_context();
2933 if (avc == NULL) {
2934 return -1;
2935 }
2936 av_dict_set(&avc->metadata, "title",
2937 stream->title[0] ? stream->title : "No Title", 0);
2938 avc->nb_streams = stream->nb_streams;
2939 if (stream->is_multicast) {
2940 snprintf(avc->filename, 1024, "rtp://%s:%d?multicast=1?ttl=%d",
2941 inet_ntoa(stream->multicast_ip),
2942 stream->multicast_port, stream->multicast_ttl);
2943 } else {
2944 snprintf(avc->filename, 1024, "rtp://0.0.0.0");
2945 }
2946
2947 if (avc->nb_streams >= INT_MAX/sizeof(*avc->streams) ||
2948 !(avc->streams = av_malloc(avc->nb_streams * sizeof(*avc->streams))))
2949 goto sdp_done;
2950 if (avc->nb_streams >= INT_MAX/sizeof(*avs) ||
2951 !(avs = av_malloc(avc->nb_streams * sizeof(*avs))))
2952 goto sdp_done;
2953
2954 for(i = 0; i < stream->nb_streams; i++) {
2955 avc->streams[i] = &avs[i];
2956 avc->streams[i]->codec = stream->streams[i]->codec;
2957 }
2958 *pbuffer = av_mallocz(2048);
2959 av_sdp_create(&avc, 1, *pbuffer, 2048);
2960
2961 sdp_done:
2962 av_free(avc->streams);
2963 av_dict_free(&avc->metadata);
2964 av_free(avc);
2965 av_free(avs);
2966
2967 return strlen(*pbuffer);
2968 }
2969
2970 static void rtsp_cmd_options(HTTPContext *c, const char *url)
2971 {
2972 // rtsp_reply_header(c, RTSP_STATUS_OK);
2973 avio_printf(c->pb, "RTSP/1.0 %d %s\r\n", RTSP_STATUS_OK, "OK");
2974 avio_printf(c->pb, "CSeq: %d\r\n", c->seq);
2975 avio_printf(c->pb, "Public: %s\r\n", "OPTIONS, DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE");
2976 avio_printf(c->pb, "\r\n");
2977 }
2978
2979 static void rtsp_cmd_describe(HTTPContext *c, const char *url)
2980 {
2981 FFStream *stream;
2982 char path1[1024];
2983 const char *path;
2984 uint8_t *content;
2985 int content_length, len;
2986 struct sockaddr_in my_addr;
2987
2988 /* find which url is asked */
2989 av_url_split(NULL, 0, NULL, 0, NULL, 0, NULL, path1, sizeof(path1), url);
2990 path = path1;
2991 if (*path == '/')
2992 path++;
2993
2994 for(stream = first_stream; stream != NULL; stream = stream->next) {
2995 if (!stream->is_feed &&
2996 stream->fmt && !strcmp(stream->fmt->name, "rtp") &&
2997 !strcmp(path, stream->filename)) {
2998 goto found;
2999 }
3000 }
3001 /* no stream found */
3002 rtsp_reply_error(c, RTSP_STATUS_SERVICE); /* XXX: right error ? */
3003 return;
3004
3005 found:
3006 /* prepare the media description in sdp format */
3007
3008 /* get the host IP */
3009 len = sizeof(my_addr);
3010 getsockname(c->fd, (struct sockaddr *)&my_addr, &len);
3011 content_length = prepare_sdp_description(stream, &content, my_addr.sin_addr);
3012 if (content_length < 0) {
3013 rtsp_reply_error(c, RTSP_STATUS_INTERNAL);
3014 return;
3015 }
3016 rtsp_reply_header(c, RTSP_STATUS_OK);
3017 avio_printf(c->pb, "Content-Base: %s/\r\n", url);
3018 avio_printf(c->pb, "Content-Type: application/sdp\r\n");
3019 avio_printf(c->pb, "Content-Length: %d\r\n", content_length);
3020 avio_printf(c->pb, "\r\n");
3021 avio_write(c->pb, content, content_length);
3022 av_free(content);
3023 }
3024
3025 static HTTPContext *find_rtp_session(const char *session_id)
3026 {
3027 HTTPContext *c;
3028
3029 if (session_id[0] == '\0')
3030 return NULL;
3031
3032 for(c = first_http_ctx; c != NULL; c = c->next) {
3033 if (!strcmp(c->session_id, session_id))
3034 return c;
3035 }
3036 return NULL;
3037 }
3038
3039 static RTSPTransportField *find_transport(RTSPMessageHeader *h, enum RTSPLowerTransport lower_transport)
3040 {
3041 RTSPTransportField *th;
3042 int i;
3043
3044 for(i=0;i<h->nb_transports;i++) {
3045 th = &h->transports[i];
3046 if (th->lower_transport == lower_transport)
3047 return th;
3048 }
3049 return NULL;
3050 }
3051
3052 static void rtsp_cmd_setup(HTTPContext *c, const char *url,
3053 RTSPMessageHeader *h)
3054 {
3055 FFStream *stream;
3056 int stream_index, rtp_port, rtcp_port;
3057 char buf[1024];
3058 char path1[1024];
3059 const char *path;
3060 HTTPContext *rtp_c;
3061 RTSPTransportField *th;
3062 struct sockaddr_in dest_addr;
3063 RTSPActionServerSetup setup;
3064
3065 /* find which url is asked */
3066 av_url_split(NULL, 0, NULL, 0, NULL, 0, NULL, path1, sizeof(path1), url);
3067 path = path1;
3068 if (*path == '/')
3069 path++;
3070
3071 /* now check each stream */
3072 for(stream = first_stream; stream != NULL; stream = stream->next) {
3073 if (!stream->is_feed &&
3074 stream->fmt && !strcmp(stream->fmt->name, "rtp")) {
3075 /* accept aggregate filenames only if single stream */
3076 if (!strcmp(path, stream->filename)) {
3077 if (stream->nb_streams != 1) {
3078 rtsp_reply_error(c, RTSP_STATUS_AGGREGATE);
3079 return;
3080 }
3081 stream_index = 0;
3082 goto found;
3083 }
3084
3085 for(stream_index = 0; stream_index < stream->nb_streams;
3086 stream_index++) {
3087 snprintf(buf, sizeof(buf), "%s/streamid=%d",
3088 stream->filename, stream_index);
3089 if (!strcmp(path, buf))
3090 goto found;
3091 }
3092 }
3093 }
3094 /* no stream found */
3095 rtsp_reply_error(c, RTSP_STATUS_SERVICE); /* XXX: right error ? */
3096 return;
3097 found:
3098
3099 /* generate session id if needed */
3100 if (h->session_id[0] == '\0')
3101 snprintf(h->session_id, sizeof(h->session_id), "%08x%08x",
3102 av_lfg_get(&random_state), av_lfg_get(&random_state));
3103
3104 /* find rtp session, and create it if none found */
3105 rtp_c = find_rtp_session(h->session_id);
3106 if (!rtp_c) {
3107 /* always prefer UDP */
3108 th = find_transport(h, RTSP_LOWER_TRANSPORT_UDP);
3109 if (!th) {
3110 th = find_transport(h, RTSP_LOWER_TRANSPORT_TCP);
3111 if (!th) {
3112 rtsp_reply_error(c, RTSP_STATUS_TRANSPORT);
3113 return;
3114 }
3115 }
3116
3117 rtp_c = rtp_new_connection(&c->from_addr, stream, h->session_id,
3118 th->lower_transport);
3119 if (!rtp_c) {
3120 rtsp_reply_error(c, RTSP_STATUS_BANDWIDTH);
3121 return;
3122 }
3123
3124 /* open input stream */
3125 if (open_input_stream(rtp_c, "") < 0) {
3126 rtsp_reply_error(c, RTSP_STATUS_INTERNAL);
3127 return;
3128 }
3129 }
3130
3131 /* test if stream is OK (test needed because several SETUP needs
3132 to be done for a given file) */
3133 if (rtp_c->stream != stream) {
3134 rtsp_reply_error(c, RTSP_STATUS_SERVICE);
3135 return;
3136 }
3137
3138 /* test if stream is already set up */
3139 if (rtp_c->rtp_ctx[stream_index]) {
3140 rtsp_reply_error(c, RTSP_STATUS_STATE);
3141 return;
3142 }
3143
3144 /* check transport */
3145 th = find_transport(h, rtp_c->rtp_protocol);
3146 if (!th || (th->lower_transport == RTSP_LOWER_TRANSPORT_UDP &&
3147 th->client_port_min <= 0)) {
3148 rtsp_reply_error(c, RTSP_STATUS_TRANSPORT);
3149 return;
3150 }
3151
3152 /* setup default options */
3153 setup.transport_option[0] = '\0';
3154 dest_addr = rtp_c->from_addr;
3155 dest_addr.sin_port = htons(th->client_port_min);
3156
3157 /* setup stream */
3158 if (rtp_new_av_stream(rtp_c, stream_index, &dest_addr, c) < 0) {
3159 rtsp_reply_error(c, RTSP_STATUS_TRANSPORT);
3160 return;
3161 }
3162
3163 /* now everything is OK, so we can send the connection parameters */
3164 rtsp_reply_header(c, RTSP_STATUS_OK);
3165 /* session ID */
3166 avio_printf(c->pb, "Session: %s\r\n", rtp_c->session_id);
3167
3168 switch(rtp_c->rtp_protocol) {
3169 case RTSP_LOWER_TRANSPORT_UDP:
3170 rtp_port = ff_rtp_get_local_rtp_port(rtp_c->rtp_handles[stream_index]);
3171 rtcp_port = ff_rtp_get_local_rtcp_port(rtp_c->rtp_handles[stream_index]);
3172 avio_printf(c->pb, "Transport: RTP/AVP/UDP;unicast;"
3173 "client_port=%d-%d;server_port=%d-%d",
3174 th->client_port_min, th->client_port_max,
3175 rtp_port, rtcp_port);
3176 break;
3177 case RTSP_LOWER_TRANSPORT_TCP:
3178 avio_printf(c->pb, "Transport: RTP/AVP/TCP;interleaved=%d-%d",
3179 stream_index * 2, stream_index * 2 + 1);
3180 break;
3181 default:
3182 break;
3183 }
3184 if (setup.transport_option[0] != '\0')
3185 avio_printf(c->pb, ";%s", setup.transport_option);
3186 avio_printf(c->pb, "\r\n");
3187
3188
3189 avio_printf(c->pb, "\r\n");
3190 }
3191
3192
3193 /* find an rtp connection by using the session ID. Check consistency
3194 with filename */
3195 static HTTPContext *find_rtp_session_with_url(const char *url,
3196 const char *session_id)
3197 {
3198 HTTPContext *rtp_c;
3199 char path1[1024];
3200 const char *path;
3201 char buf[1024];
3202 int s, len;
3203
3204 rtp_c = find_rtp_session(session_id);
3205 if (!rtp_c)
3206 return NULL;
3207
3208 /* find which url is asked */
3209 av_url_split(NULL, 0, NULL, 0, NULL, 0, NULL, path1, sizeof(path1), url);
3210 path = path1;
3211 if (*path == '/')
3212 path++;
3213 if(!strcmp(path, rtp_c->stream->filename)) return rtp_c;
3214 for(s=0; s<rtp_c->stream->nb_streams; ++s) {
3215 snprintf(buf, sizeof(buf), "%s/streamid=%d",
3216 rtp_c->stream->filename, s);
3217 if(!strncmp(path, buf, sizeof(buf))) {
3218 // XXX: Should we reply with RTSP_STATUS_ONLY_AGGREGATE if nb_streams>1?
3219 return rtp_c;
3220 }
3221 }
3222 len = strlen(path);
3223 if (len > 0 && path[len - 1] == '/' &&
3224 !strncmp(path, rtp_c->stream->filename, len - 1))
3225 return rtp_c;
3226 return NULL;
3227 }
3228
3229 static void rtsp_cmd_play(HTTPContext *c, const char *url, RTSPMessageHeader *h)
3230 {
3231 HTTPContext *rtp_c;
3232
3233 rtp_c = find_rtp_session_with_url(url, h->session_id);
3234 if (!rtp_c) {
3235 rtsp_reply_error(c, RTSP_STATUS_SESSION);
3236 return;
3237 }
3238
3239 if (rtp_c->state != HTTPSTATE_SEND_DATA &&
3240 rtp_c->state != HTTPSTATE_WAIT_FEED &&
3241 rtp_c->state != HTTPSTATE_READY) {<