2 * This file is part of DisOrder.
3 * Copyright (C) 2004, 2005, 2006, 2007 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
25 #include <sys/types.h>
26 #include <sys/socket.h>
39 #include <netinet/in.h>
45 #include "server-queue.h"
52 #include "configuration.h"
62 #include "trackname.h"
68 # define NONCE_SIZE 16
71 int volume_left
, volume_right
; /* last known volume */
73 /** @brief Accept all well-formed login attempts
84 /** @brief One client connection */
86 /** @brief Read commands from here */
88 /** @brief Send responses to here */
90 /** @brief Underlying file descriptor */
92 /** @brief Unique identifier for connection used in log messages */
94 /** @brief Login name or NULL */
96 /** @brief Event loop */
98 /** @brief Nonce chosen for this connection */
99 unsigned char nonce
[NONCE_SIZE
];
100 /** @brief Current reader callback
102 * We change this depending on whether we're servicing the @b log command
104 ev_reader_callback
*reader
;
105 /** @brief Event log output sending to this connection */
106 struct eventlog_output
*lo
;
107 /** @brief Parent listener */
108 const struct listener
*l
;
111 static int reader_callback(ev_source
*ev
,
118 static const char *noyes
[] = { "no", "yes" };
120 /** @brief Called when a connection's writer fails or is shut down
122 * If the connection still has a raeder that is cancelled.
124 static int writer_error(ev_source
attribute((unused
)) *ev
,
129 D(("server writer_error S%x %d", c
->tag
, errno_value
));
130 if(errno_value
== 0) {
132 D(("S%x writer completed", c
->tag
));
134 if(errno_value
!= EPIPE
)
135 error(errno_value
, "S%x write error on socket", c
->tag
);
137 D(("cancel reader"));
138 ev_reader_cancel(c
->r
);
141 D(("done cancel reader"));
148 /** @brief Called when a conncetion's reader fails or is shut down
150 * If connection still has a writer then it is closed.
152 static int reader_error(ev_source
attribute((unused
)) *ev
,
157 D(("server reader_error S%x %d", c
->tag
, errno_value
));
158 error(errno_value
, "S%x read error on socket", c
->tag
);
160 ev_writer_close(c
->w
);
167 /** @brief Return true if we are talking to a trusted user */
168 static int trusted(struct conn
*c
) {
171 for(n
= 0; (n
< config
->trust
.n
172 && strcmp(config
->trust
.s
[n
], c
->who
)); ++n
)
174 return n
< config
->trust
.n
;
177 static int c_disable(struct conn
*c
, char **vec
, int nvec
) {
179 disable_playing(c
->who
);
180 else if(nvec
== 1 && !strcmp(vec
[0], "now"))
181 disable_playing(c
->who
);
183 sink_writes(ev_writer_sink(c
->w
), "550 invalid argument\n");
184 return 1; /* completed */
186 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
187 return 1; /* completed */
190 static int c_enable(struct conn
*c
,
191 char attribute((unused
)) **vec
,
192 int attribute((unused
)) nvec
) {
193 enable_playing(c
->who
, c
->ev
);
194 /* Enable implicitly unpauses if there is nothing playing */
195 if(paused
&& !playing
) resume_playing(c
->who
);
196 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
197 return 1; /* completed */
200 static int c_enabled(struct conn
*c
,
201 char attribute((unused
)) **vec
,
202 int attribute((unused
)) nvec
) {
203 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[playing_is_enabled()]);
204 return 1; /* completed */
207 static int c_play(struct conn
*c
, char **vec
,
208 int attribute((unused
)) nvec
) {
210 struct queue_entry
*q
;
212 if(!trackdb_exists(vec
[0])) {
213 sink_writes(ev_writer_sink(c
->w
), "550 track is not in database\n");
216 if(!(track
= trackdb_resolve(vec
[0]))) {
217 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
220 q
= queue_add(track
, c
->who
, WHERE_BEFORE_RANDOM
);
222 /* If we added the first track, and something is playing, then prepare the
223 * new track. If nothing is playing then we don't bother as it wouldn't gain
225 if(q
== qhead
.next
&& playing
)
227 sink_writes(ev_writer_sink(c
->w
), "250 queued\n");
228 /* If the queue was empty but we are for some reason paused then
230 if(!playing
) resume_playing(0);
232 return 1; /* completed */
235 static int c_remove(struct conn
*c
, char **vec
,
236 int attribute((unused
)) nvec
) {
237 struct queue_entry
*q
;
239 if(!(q
= queue_find(vec
[0]))) {
240 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
243 if(config
->restrictions
& RESTRICT_REMOVE
) {
244 /* can only remove tracks that you submitted */
245 if(!q
->submitter
|| strcmp(q
->submitter
, c
->who
)) {
246 sink_writes(ev_writer_sink(c
->w
), "550 you didn't submit that track!\n");
250 queue_remove(q
, c
->who
);
251 /* De-prepare the track. */
253 /* If we removed the random track then add another one. */
254 if(q
->state
== playing_random
)
256 /* Prepare whatever the next head track is. */
257 if(qhead
.next
!= &qhead
)
258 prepare(c
->ev
, qhead
.next
);
260 sink_writes(ev_writer_sink(c
->w
), "250 removed\n");
261 return 1; /* completed */
264 static int c_scratch(struct conn
*c
,
268 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
269 return 1; /* completed */
271 if(config
->restrictions
& RESTRICT_SCRATCH
) {
272 /* can only scratch tracks you submitted and randomly selected ones */
273 if(playing
->submitter
&& strcmp(playing
->submitter
, c
->who
)) {
274 sink_writes(ev_writer_sink(c
->w
), "550 you didn't submit that track!\n");
278 scratch(c
->who
, nvec
== 1 ? vec
[0] : 0);
279 /* If you scratch an unpaused track then it is automatically unpaused */
281 sink_writes(ev_writer_sink(c
->w
), "250 scratched\n");
282 return 1; /* completed */
285 static int c_pause(struct conn
*c
,
286 char attribute((unused
)) **vec
,
287 int attribute((unused
)) nvec
) {
289 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
290 return 1; /* completed */
293 sink_writes(ev_writer_sink(c
->w
), "250 already paused\n");
294 return 1; /* completed */
296 if(pause_playing(c
->who
) < 0)
297 sink_writes(ev_writer_sink(c
->w
), "550 cannot pause this track\n");
299 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
303 static int c_resume(struct conn
*c
,
304 char attribute((unused
)) **vec
,
305 int attribute((unused
)) nvec
) {
307 sink_writes(ev_writer_sink(c
->w
), "250 not paused\n");
308 return 1; /* completed */
310 resume_playing(c
->who
);
311 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
315 static int c_shutdown(struct conn
*c
,
316 char attribute((unused
)) **vec
,
317 int attribute((unused
)) nvec
) {
318 info("S%x shut down by %s", c
->tag
, c
->who
);
319 sink_writes(ev_writer_sink(c
->w
), "250 shutting down\n");
320 ev_writer_flush(c
->w
);
324 static int c_reconfigure(struct conn
*c
,
325 char attribute((unused
)) **vec
,
326 int attribute((unused
)) nvec
) {
327 info("S%x reconfigure by %s", c
->tag
, c
->who
);
328 if(reconfigure(c
->ev
, 1))
329 sink_writes(ev_writer_sink(c
->w
), "550 error reading new config\n");
331 sink_writes(ev_writer_sink(c
->w
), "250 installed new config\n");
332 return 1; /* completed */
335 static int c_rescan(struct conn
*c
,
336 char attribute((unused
)) **vec
,
337 int attribute((unused
)) nvec
) {
338 info("S%x rescan by %s", c
->tag
, c
->who
);
339 trackdb_rescan(c
->ev
);
340 sink_writes(ev_writer_sink(c
->w
), "250 initiated rescan\n");
341 return 1; /* completed */
344 static int c_version(struct conn
*c
,
345 char attribute((unused
)) **vec
,
346 int attribute((unused
)) nvec
) {
347 /* VERSION had better only use the basic character set */
348 sink_printf(ev_writer_sink(c
->w
), "251 %s\n", disorder_version_string
);
349 return 1; /* completed */
352 static int c_playing(struct conn
*c
,
353 char attribute((unused
)) **vec
,
354 int attribute((unused
)) nvec
) {
356 queue_fix_sofar(playing
);
357 playing
->expected
= 0;
358 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", queue_marshall(playing
));
360 sink_printf(ev_writer_sink(c
->w
), "259 nothing playing\n");
361 return 1; /* completed */
364 static int c_become(struct conn
*c
,
366 int attribute((unused
)) nvec
) {
368 sink_writes(ev_writer_sink(c
->w
), "230 OK\n");
372 static int c_user(struct conn
*c
,
374 int attribute((unused
)) nvec
) {
379 struct sockaddr_in in
;
380 struct sockaddr_in6 in6
;
386 sink_writes(ev_writer_sink(c
->w
), "530 already authenticated\n");
389 /* get connection data */
391 if(getpeername(c
->fd
, &u
.sa
, &l
) < 0) {
392 error(errno
, "S%x error calling getpeername", c
->tag
);
393 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
396 if(c
->l
->pf
!= PF_UNIX
) {
397 if((n
= getnameinfo(&u
.sa
, l
,
398 host
, sizeof host
, 0, 0, NI_NUMERICHOST
))) {
399 error(0, "S%x error calling getnameinfo: %s", c
->tag
, gai_strerror(n
));
400 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
404 strcpy(host
, "local");
406 for(n
= 0; n
< config
->allow
.n
407 && strcmp(config
->allow
.s
[n
].s
[0], vec
[0]); ++n
)
409 /* if it's a real user check whether the response is right */
410 if(n
>= config
->allow
.n
) {
411 info("S%x unknown user '%s' from %s", c
->tag
, vec
[0], host
);
412 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
415 res
= authhash(c
->nonce
, sizeof c
->nonce
, config
->allow
.s
[n
].s
[1],
416 config
->authorization_algorithm
);
417 if(wideopen
|| (res
&& !strcmp(res
, vec
[1]))) {
419 /* currently we only bother logging remote connections */
420 if(c
->l
->pf
!= PF_UNIX
)
421 info("S%x %s connected from %s", c
->tag
, vec
[0], host
);
422 sink_writes(ev_writer_sink(c
->w
), "230 OK\n");
425 /* oops, response was wrong */
426 info("S%x authentication failure for %s from %s", c
->tag
, vec
[0], host
);
427 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
431 static int c_recent(struct conn
*c
,
432 char attribute((unused
)) **vec
,
433 int attribute((unused
)) nvec
) {
434 const struct queue_entry
*q
;
436 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
437 for(q
= phead
.next
; q
!= &phead
; q
= q
->next
)
438 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
439 sink_writes(ev_writer_sink(c
->w
), ".\n");
440 return 1; /* completed */
443 static int c_queue(struct conn
*c
,
444 char attribute((unused
)) **vec
,
445 int attribute((unused
)) nvec
) {
446 struct queue_entry
*q
;
451 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
452 if(playing_is_enabled() && !paused
) {
454 queue_fix_sofar(playing
);
455 if((l
= trackdb_get(playing
->track
, "_length"))
456 && (length
= atol(l
))) {
458 when
+= length
- playing
->sofar
+ config
->gap
;
461 /* Nothing is playing but playing is enabled, so whatever is
462 * first in the queue can be expected to start immediately. */
465 for(q
= qhead
.next
; q
!= &qhead
; q
= q
->next
) {
466 /* fill in estimated start time */
468 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
469 /* update for next track */
471 if((l
= trackdb_get(q
->track
, "_length"))
472 && (length
= atol(l
)))
473 when
+= length
+ config
->gap
;
478 sink_writes(ev_writer_sink(c
->w
), ".\n");
479 return 1; /* completed */
482 static int output_list(struct conn
*c
, char **vec
) {
484 sink_printf(ev_writer_sink(c
->w
), "%s\n", *vec
++);
485 sink_writes(ev_writer_sink(c
->w
), ".\n");
489 static int files_dirs(struct conn
*c
,
492 enum trackdb_listable what
) {
493 const char *dir
, *re
, *errstr
;
499 case 0: dir
= 0; re
= 0; break;
500 case 1: dir
= vec
[0]; re
= 0; break;
501 case 2: dir
= vec
[0]; re
= vec
[1]; break;
504 /* A bit of a bodge to make sure the args don't trample on cache keys */
505 if(dir
&& strchr(dir
, '\n')) {
506 sink_writes(ev_writer_sink(c
->w
), "550 invalid directory name\n");
509 if(re
&& strchr(re
, '\n')) {
510 sink_writes(ev_writer_sink(c
->w
), "550 invalid regexp\n");
513 /* We bother eliminating "" because the web interface is relatively
514 * likely to send it */
516 byte_xasprintf(&key
, "%d\n%s\n%s", (int)what
, dir ? dir
: "", re
);
517 fvec
= (char **)cache_get(&cache_files_type
, key
);
519 /* Got a cache hit, don't store the answer in the cache */
522 rec
= 0; /* quieten compiler */
524 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
526 if(!(rec
= pcre_compile(re
, PCRE_CASELESS
|PCRE_UTF8
,
527 &errstr
, &erroffset
, 0))) {
528 sink_printf(ev_writer_sink(c
->w
), "550 Error compiling regexp: %s\n",
532 /* It only counts as a miss if the regexp was valid. */
533 ++cache_files_misses
;
536 /* No regexp, don't bother caching the result */
542 /* No cache hit (either because a miss, or because we did not look) so do
545 fvec
= trackdb_list(dir
, 0, what
, rec
);
547 fvec
= trackdb_list(0, 0, what
, rec
);
550 /* Put the answer in the cache */
551 cache_put(&cache_files_type
, key
, fvec
);
552 sink_writes(ev_writer_sink(c
->w
), "253 Listing follow\n");
553 return output_list(c
, fvec
);
556 static int c_files(struct conn
*c
,
559 return files_dirs(c
, vec
, nvec
, trackdb_files
);
562 static int c_dirs(struct conn
*c
,
565 return files_dirs(c
, vec
, nvec
, trackdb_directories
);
568 static int c_allfiles(struct conn
*c
,
571 return files_dirs(c
, vec
, nvec
, trackdb_directories
|trackdb_files
);
574 static int c_get(struct conn
*c
,
576 int attribute((unused
)) nvec
) {
579 if(vec
[1][0] != '_' && (v
= trackdb_get(vec
[0], vec
[1])))
580 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", v
);
582 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
586 static int c_length(struct conn
*c
,
588 int attribute((unused
)) nvec
) {
589 const char *track
, *v
;
591 if(!(track
= trackdb_resolve(vec
[0]))) {
592 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
595 if((v
= trackdb_get(track
, "_length")))
596 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", v
);
598 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
602 static int c_set(struct conn
*c
,
604 int attribute((unused
)) nvec
) {
605 if(vec
[1][0] != '_' && !trackdb_set(vec
[0], vec
[1], vec
[2]))
606 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
608 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
612 static int c_prefs(struct conn
*c
,
614 int attribute((unused
)) nvec
) {
617 k
= trackdb_get_all(vec
[0]);
618 sink_writes(ev_writer_sink(c
->w
), "253 prefs follow\n");
619 for(; k
; k
= k
->next
)
620 if(k
->name
[0] != '_') /* omit internal values */
621 sink_printf(ev_writer_sink(c
->w
),
622 " %s %s\n", quoteutf8(k
->name
), quoteutf8(k
->value
));
623 sink_writes(ev_writer_sink(c
->w
), ".\n");
627 static int c_exists(struct conn
*c
,
629 int attribute((unused
)) nvec
) {
630 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[trackdb_exists(vec
[0])]);
634 static void search_parse_error(const char *msg
, void *u
) {
635 *(const char **)u
= msg
;
638 static int c_search(struct conn
*c
,
640 int attribute((unused
)) nvec
) {
641 char **terms
, **results
;
642 int nterms
, nresults
, n
;
643 const char *e
= "unknown error";
645 /* This is a bit of a bodge. Initially it's there to make the eclient
646 * interface a bit more convenient to add searching to, but it has the more
647 * compelling advantage that if everything uses it, then interpretation of
648 * user-supplied search strings will be the same everywhere. */
649 if(!(terms
= split(vec
[0], &nterms
, SPLIT_QUOTES
, search_parse_error
, &e
))) {
650 sink_printf(ev_writer_sink(c
->w
), "550 %s\n", e
);
652 results
= trackdb_search(terms
, nterms
, &nresults
);
653 sink_printf(ev_writer_sink(c
->w
), "253 %d matches\n", nresults
);
654 for(n
= 0; n
< nresults
; ++n
)
655 sink_printf(ev_writer_sink(c
->w
), "%s\n", results
[n
]);
656 sink_writes(ev_writer_sink(c
->w
), ".\n");
661 static int c_random_enable(struct conn
*c
,
662 char attribute((unused
)) **vec
,
663 int attribute((unused
)) nvec
) {
664 enable_random(c
->who
, c
->ev
);
665 /* Enable implicitly unpauses if there is nothing playing */
666 if(paused
&& !playing
) resume_playing(c
->who
);
667 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
668 return 1; /* completed */
671 static int c_random_disable(struct conn
*c
,
672 char attribute((unused
)) **vec
,
673 int attribute((unused
)) nvec
) {
674 disable_random(c
->who
);
675 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
676 return 1; /* completed */
679 static int c_random_enabled(struct conn
*c
,
680 char attribute((unused
)) **vec
,
681 int attribute((unused
)) nvec
) {
682 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[random_is_enabled()]);
683 return 1; /* completed */
686 static void got_stats(char *stats
, void *u
) {
687 struct conn
*const c
= u
;
689 sink_printf(ev_writer_sink(c
->w
), "253 stats\n%s\n.\n", stats
);
690 /* Now we can start processing commands again */
691 ev_reader_enable(c
->r
);
694 static int c_stats(struct conn
*c
,
695 char attribute((unused
)) **vec
,
696 int attribute((unused
)) nvec
) {
697 trackdb_stats_subprocess(c
->ev
, got_stats
, c
);
698 return 0; /* not yet complete */
701 static int c_volume(struct conn
*c
,
712 l
= r
= atoi(vec
[0]);
723 if(mixer_control(&l
, &r
, set
))
724 sink_writes(ev_writer_sink(c
->w
), "550 error accessing mixer\n");
726 sink_printf(ev_writer_sink(c
->w
), "252 %d %d\n", l
, r
);
727 if(l
!= volume_left
|| r
!= volume_right
) {
730 snprintf(lb
, sizeof lb
, "%d", l
);
731 snprintf(rb
, sizeof rb
, "%d", r
);
732 eventlog("volume", lb
, rb
, (char *)0);
738 /** @brief Called when data arrives on a log connection
740 * We just discard all such data. The client may occasionally send data as a
743 static int logging_reader_callback(ev_source
attribute((unused
)) *ev
,
745 void attribute((unused
)) *ptr
,
747 int attribute((unused
)) eof
,
748 void attribute((unused
)) *u
) {
751 ev_reader_consume(reader
, bytes
);
753 /* Oops, that's all for now */
754 D(("logging reader eof"));
757 ev_writer_close(c
->w
);
765 static void logclient(const char *msg
, void *user
) {
766 struct conn
*c
= user
;
769 /* This connection has gone up in smoke for some reason */
770 eventlog_remove(c
->lo
);
773 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" %s\n",
774 (uintmax_t)time(0), msg
);
777 static int c_log(struct conn
*c
,
778 char attribute((unused
)) **vec
,
779 int attribute((unused
)) nvec
) {
782 sink_writes(ev_writer_sink(c
->w
), "254 OK\n");
783 /* pump out initial state */
785 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
787 playing_is_enabled() ?
"enable_play" : "disable_play");
788 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
790 random_is_enabled() ?
"enable_random" : "disable_random");
791 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
793 paused ?
"pause" : "resume");
795 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state playing\n",
798 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" volume %d %d\n",
799 (uintmax_t)now
, volume_left
, volume_right
);
800 c
->lo
= xmalloc(sizeof *c
->lo
);
801 c
->lo
->fn
= logclient
;
804 c
->reader
= logging_reader_callback
;
808 static int c_move(struct conn
*c
,
810 int attribute((unused
)) nvec
) {
811 struct queue_entry
*q
;
814 if(config
->restrictions
& RESTRICT_MOVE
) {
816 sink_writes(ev_writer_sink(c
->w
),
817 "550 only trusted users can move tracks\n");
821 if(!(q
= queue_find(vec
[0]))) {
822 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
825 n
= queue_move(q
, atoi(vec
[1]), c
->who
);
826 sink_printf(ev_writer_sink(c
->w
), "252 %d\n", n
);
827 /* If we've moved to the head of the queue then prepare the track. */
833 static int c_moveafter(struct conn
*c
,
835 int attribute((unused
)) nvec
) {
836 struct queue_entry
*q
, **qs
;
839 if(config
->restrictions
& RESTRICT_MOVE
) {
841 sink_writes(ev_writer_sink(c
->w
),
842 "550 only trusted users can move tracks\n");
847 if(!(q
= queue_find(vec
[0]))) {
848 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
855 qs
= xcalloc(nvec
, sizeof *qs
);
856 for(n
= 0; n
< nvec
; ++n
)
857 if(!(qs
[n
] = queue_find(vec
[n
]))) {
858 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
861 queue_moveafter(q
, nvec
, qs
, c
->who
);
862 sink_printf(ev_writer_sink(c
->w
), "250 Moved tracks\n");
863 /* If we've moved to the head of the queue then prepare the track. */
869 static int c_part(struct conn
*c
,
871 int attribute((unused
)) nvec
) {
872 sink_printf(ev_writer_sink(c
->w
), "252 %s\n",
873 trackdb_getpart(vec
[0], vec
[1], vec
[2]));
877 static int c_resolve(struct conn
*c
,
879 int attribute((unused
)) nvec
) {
882 if(!(track
= trackdb_resolve(vec
[0]))) {
883 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
886 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", track
);
890 static int c_tags(struct conn
*c
,
891 char attribute((unused
)) **vec
,
892 int attribute((unused
)) nvec
) {
893 char **tags
= trackdb_alltags();
895 sink_printf(ev_writer_sink(c
->w
), "253 Tag list follows\n");
897 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
898 **tags
== '.' ?
"." : "", *tags
);
901 sink_writes(ev_writer_sink(c
->w
), ".\n");
902 return 1; /* completed */
906 static int c_set_global(struct conn
*c
,
908 int attribute((unused
)) nvec
) {
909 trackdb_set_global(vec
[0], vec
[1], c
->who
);
910 sink_printf(ev_writer_sink(c
->w
), "250 OK\n");
914 static int c_get_global(struct conn
*c
,
916 int attribute((unused
)) nvec
) {
917 const char *s
= trackdb_get_global(vec
[0]);
920 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", s
);
922 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
926 static int c_nop(struct conn
*c
,
927 char attribute((unused
)) **vec
,
928 int attribute((unused
)) nvec
) {
929 sink_printf(ev_writer_sink(c
->w
), "250 Quack\n");
933 static int c_new(struct conn
*c
,
936 char **tracks
= trackdb_new(0, nvec
> 0 ?
atoi(vec
[0]) : INT_MAX
);
938 sink_printf(ev_writer_sink(c
->w
), "253 New track list follows\n");
940 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
941 **tracks
== '.' ?
"." : "", *tracks
);
944 sink_writes(ev_writer_sink(c
->w
), ".\n");
945 return 1; /* completed */
949 static int c_rtp_address(struct conn
*c
,
950 char attribute((unused
)) **vec
,
951 int attribute((unused
)) nvec
) {
952 if(config
->speaker_backend
== BACKEND_NETWORK
) {
953 sink_printf(ev_writer_sink(c
->w
), "252 %s %s\n",
954 quoteutf8(config
->broadcast
.s
[0]),
955 quoteutf8(config
->broadcast
.s
[1]));
957 sink_writes(ev_writer_sink(c
->w
), "550 No RTP\n");
961 #define C_AUTH 0001 /* must be authenticated */
962 #define C_TRUSTED 0002 /* must be trusted user */
964 static const struct command
{
966 int minargs
, maxargs
;
967 int (*fn
)(struct conn
*, char **, int);
970 { "allfiles", 0, 2, c_allfiles
, C_AUTH
},
971 { "become", 1, 1, c_become
, C_AUTH
|C_TRUSTED
},
972 { "dirs", 0, 2, c_dirs
, C_AUTH
},
973 { "disable", 0, 1, c_disable
, C_AUTH
},
974 { "enable", 0, 0, c_enable
, C_AUTH
},
975 { "enabled", 0, 0, c_enabled
, C_AUTH
},
976 { "exists", 1, 1, c_exists
, C_AUTH
},
977 { "files", 0, 2, c_files
, C_AUTH
},
978 { "get", 2, 2, c_get
, C_AUTH
},
979 { "get-global", 1, 1, c_get_global
, C_AUTH
},
980 { "length", 1, 1, c_length
, C_AUTH
},
981 { "log", 0, 0, c_log
, C_AUTH
},
982 { "move", 2, 2, c_move
, C_AUTH
},
983 { "moveafter", 1, INT_MAX
, c_moveafter
, C_AUTH
},
984 { "new", 0, 1, c_new
, C_AUTH
},
985 { "nop", 0, 0, c_nop
, C_AUTH
},
986 { "part", 3, 3, c_part
, C_AUTH
},
987 { "pause", 0, 0, c_pause
, C_AUTH
},
988 { "play", 1, 1, c_play
, C_AUTH
},
989 { "playing", 0, 0, c_playing
, C_AUTH
},
990 { "prefs", 1, 1, c_prefs
, C_AUTH
},
991 { "queue", 0, 0, c_queue
, C_AUTH
},
992 { "random-disable", 0, 0, c_random_disable
, C_AUTH
},
993 { "random-enable", 0, 0, c_random_enable
, C_AUTH
},
994 { "random-enabled", 0, 0, c_random_enabled
, C_AUTH
},
995 { "recent", 0, 0, c_recent
, C_AUTH
},
996 { "reconfigure", 0, 0, c_reconfigure
, C_AUTH
|C_TRUSTED
},
997 { "remove", 1, 1, c_remove
, C_AUTH
},
998 { "rescan", 0, 0, c_rescan
, C_AUTH
|C_TRUSTED
},
999 { "resolve", 1, 1, c_resolve
, C_AUTH
},
1000 { "resume", 0, 0, c_resume
, C_AUTH
},
1001 { "rtp-address", 0, 0, c_rtp_address
, C_AUTH
},
1002 { "scratch", 0, 1, c_scratch
, C_AUTH
},
1003 { "search", 1, 1, c_search
, C_AUTH
},
1004 { "set", 3, 3, c_set
, C_AUTH
, },
1005 { "set-global", 2, 2, c_set_global
, C_AUTH
},
1006 { "shutdown", 0, 0, c_shutdown
, C_AUTH
|C_TRUSTED
},
1007 { "stats", 0, 0, c_stats
, C_AUTH
},
1008 { "tags", 0, 0, c_tags
, C_AUTH
},
1009 { "unset", 2, 2, c_set
, C_AUTH
},
1010 { "unset-global", 1, 1, c_set_global
, C_AUTH
},
1011 { "user", 2, 2, c_user
, 0 },
1012 { "version", 0, 0, c_version
, C_AUTH
},
1013 { "volume", 0, 2, c_volume
, C_AUTH
}
1016 static void command_error(const char *msg
, void *u
) {
1019 sink_printf(ev_writer_sink(c
->w
), "500 parse error: %s\n", msg
);
1022 /* process a command. Return 1 if complete, 0 if incomplete. */
1023 static int command(struct conn
*c
, char *line
) {
1027 D(("server command %s", line
));
1028 if(!(vec
= split(line
, &nvec
, SPLIT_QUOTES
, command_error
, c
))) {
1029 sink_writes(ev_writer_sink(c
->w
), "500 cannot parse command\n");
1033 sink_writes(ev_writer_sink(c
->w
), "500 do what?\n");
1036 if((n
= TABLE_FIND(commands
, struct command
, name
, vec
[0])) < 0)
1037 sink_writes(ev_writer_sink(c
->w
), "500 unknown command\n");
1039 if((commands
[n
].flags
& C_AUTH
) && !c
->who
) {
1040 sink_writes(ev_writer_sink(c
->w
), "530 not authenticated\n");
1043 if((commands
[n
].flags
& C_TRUSTED
) && !trusted(c
)) {
1044 sink_writes(ev_writer_sink(c
->w
), "530 insufficient privilege\n");
1049 if(nvec
< commands
[n
].minargs
) {
1050 sink_writes(ev_writer_sink(c
->w
), "500 missing argument(s)\n");
1053 if(nvec
> commands
[n
].maxargs
) {
1054 sink_writes(ev_writer_sink(c
->w
), "500 too many arguments\n");
1057 return commands
[n
].fn(c
, vec
, nvec
);
1059 return 1; /* completed */
1062 /* redirect to the right reader callback for our current state */
1063 static int redirect_reader_callback(ev_source
*ev
,
1071 return c
->reader(ev
, reader
, ptr
, bytes
, eof
, u
);
1074 /* the main command reader */
1075 static int reader_callback(ev_source
attribute((unused
)) *ev
,
1085 D(("server reader_callback"));
1086 while((eol
= memchr(ptr
, '\n', bytes
))) {
1088 ev_reader_consume(reader
, eol
- (char *)ptr
);
1089 complete
= command(c
, ptr
);
1090 bytes
-= (eol
- (char *)ptr
);
1093 /* the command had better have set a new reader callback */
1095 /* there are further bytes to read, or we are at eof; arrange for the
1096 * command's reader callback to handle them */
1097 return ev_reader_incomplete(reader
);
1098 /* nothing's going on right now */
1101 /* command completed, we can go around and handle the next one */
1105 error(0, "S%x unterminated line", c
->tag
);
1106 D(("normal reader close"));
1109 D(("close associated writer"));
1110 ev_writer_close(c
->w
);
1117 static int listen_callback(ev_source
*ev
,
1119 const struct sockaddr
attribute((unused
)) *remote
,
1120 socklen_t
attribute((unused
)) rlen
,
1122 const struct listener
*l
= u
;
1123 struct conn
*c
= xmalloc(sizeof *c
);
1124 static unsigned tags
;
1126 D(("server listen_callback fd %d (%s)", fd
, l
->name
));
1131 c
->w
= ev_writer_new(ev
, fd
, writer_error
, c
,
1133 c
->r
= ev_reader_new(ev
, fd
, redirect_reader_callback
, reader_error
, c
,
1137 c
->reader
= reader_callback
;
1139 gcry_randomize(c
->nonce
, sizeof c
->nonce
, GCRY_STRONG_RANDOM
);
1140 if(!strcmp(config
->authorization_algorithm
, "sha1")
1141 || !strcmp(config
->authorization_algorithm
, "SHA1")) {
1142 sink_printf(ev_writer_sink(c
->w
), "231 %s\n",
1143 hex(c
->nonce
, sizeof c
->nonce
));
1145 sink_printf(ev_writer_sink(c
->w
), "231 %s %s\n",
1146 config
->authorization_algorithm
,
1147 hex(c
->nonce
, sizeof c
->nonce
));
1152 int server_start(ev_source
*ev
, int pf
,
1153 size_t socklen
, const struct sockaddr
*sa
,
1156 struct listener
*l
= xmalloc(sizeof *l
);
1157 static const int one
= 1;
1159 D(("server_init socket %s", name
));
1160 fd
= xsocket(pf
, SOCK_STREAM
, 0);
1161 xsetsockopt(fd
, SOL_SOCKET
, SO_REUSEADDR
, &one
, sizeof one
);
1162 if(bind(fd
, sa
, socklen
) < 0) {
1163 error(errno
, "error binding to %s", name
);
1171 if(ev_listen(ev
, fd
, listen_callback
, l
, "server listener"))
1176 int server_stop(ev_source
*ev
, int fd
) {
1178 return ev_listen_cancel(ev
, fd
);