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"
63 #include "trackname.h"
72 # define NONCE_SIZE 16
75 int volume_left
, volume_right
; /* last known volume */
77 /** @brief Accept all well-formed login attempts
88 /** @brief One client connection */
90 /** @brief Read commands from here */
92 /** @brief Send responses to here */
94 /** @brief Underlying file descriptor */
96 /** @brief Unique identifier for connection used in log messages */
98 /** @brief Login name or NULL */
100 /** @brief Event loop */
102 /** @brief Nonce chosen for this connection */
103 unsigned char nonce
[NONCE_SIZE
];
104 /** @brief Current reader callback
106 * We change this depending on whether we're servicing the @b log command
108 ev_reader_callback
*reader
;
109 /** @brief Event log output sending to this connection */
110 struct eventlog_output
*lo
;
111 /** @brief Parent listener */
112 const struct listener
*l
;
113 /** @brief Login cookie or NULL */
115 /** @brief Connection rights */
119 static int reader_callback(ev_source
*ev
,
126 static const char *noyes
[] = { "no", "yes" };
128 /** @brief Called when a connection's writer fails or is shut down
130 * If the connection still has a raeder that is cancelled.
132 static int writer_error(ev_source
attribute((unused
)) *ev
,
137 D(("server writer_error S%x %d", c
->tag
, errno_value
));
138 if(errno_value
== 0) {
140 D(("S%x writer completed", c
->tag
));
142 if(errno_value
!= EPIPE
)
143 error(errno_value
, "S%x write error on socket", c
->tag
);
145 D(("cancel reader"));
146 ev_reader_cancel(c
->r
);
149 D(("done cancel reader"));
156 /** @brief Called when a conncetion's reader fails or is shut down
158 * If connection still has a writer then it is closed.
160 static int reader_error(ev_source
attribute((unused
)) *ev
,
165 D(("server reader_error S%x %d", c
->tag
, errno_value
));
166 error(errno_value
, "S%x read error on socket", c
->tag
);
168 ev_writer_close(c
->w
);
175 static int c_disable(struct conn
*c
, char **vec
, int nvec
) {
177 disable_playing(c
->who
);
178 else if(nvec
== 1 && !strcmp(vec
[0], "now"))
179 disable_playing(c
->who
);
181 sink_writes(ev_writer_sink(c
->w
), "550 invalid argument\n");
182 return 1; /* completed */
184 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
185 return 1; /* completed */
188 static int c_enable(struct conn
*c
,
189 char attribute((unused
)) **vec
,
190 int attribute((unused
)) nvec
) {
191 enable_playing(c
->who
, c
->ev
);
192 /* Enable implicitly unpauses if there is nothing playing */
193 if(paused
&& !playing
) resume_playing(c
->who
);
194 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
195 return 1; /* completed */
198 static int c_enabled(struct conn
*c
,
199 char attribute((unused
)) **vec
,
200 int attribute((unused
)) nvec
) {
201 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[playing_is_enabled()]);
202 return 1; /* completed */
205 static int c_play(struct conn
*c
, char **vec
,
206 int attribute((unused
)) nvec
) {
208 struct queue_entry
*q
;
210 if(!trackdb_exists(vec
[0])) {
211 sink_writes(ev_writer_sink(c
->w
), "550 track is not in database\n");
214 if(!(track
= trackdb_resolve(vec
[0]))) {
215 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
218 q
= queue_add(track
, c
->who
, WHERE_BEFORE_RANDOM
);
220 /* If we added the first track, and something is playing, then prepare the
221 * new track. If nothing is playing then we don't bother as it wouldn't gain
223 if(q
== qhead
.next
&& playing
)
225 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", q
->id
);
226 /* If the queue was empty but we are for some reason paused then
228 if(!playing
) resume_playing(0);
230 return 1; /* completed */
233 static int c_remove(struct conn
*c
, char **vec
,
234 int attribute((unused
)) nvec
) {
235 struct queue_entry
*q
;
238 if(!(q
= queue_find(vec
[0]))) {
239 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
243 if(!strcmp(q
->submitter
, c
->who
))
244 r
= RIGHT_REMOVE_MINE
;
246 r
= RIGHT_REMOVE_ANY
;
248 r
= RIGHT_REMOVE_RANDOM
;
249 if(!(c
->rights
& r
)) {
250 sink_writes(ev_writer_sink(c
->w
),
251 "550 Not authorized to remove that track\n");
254 queue_remove(q
, c
->who
);
255 /* De-prepare the track. */
257 /* If we removed a random track then add another one. */
258 if(q
->state
== playing_random
)
260 /* Prepare whatever the next head track is. */
261 if(qhead
.next
!= &qhead
)
262 prepare(c
->ev
, qhead
.next
);
264 sink_writes(ev_writer_sink(c
->w
), "250 removed\n");
265 return 1; /* completed */
268 static int c_scratch(struct conn
*c
,
274 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
275 return 1; /* completed */
277 /* TODO there is a bug here: if we specify an ID but it's not the currently
278 * playing track then you will get 550 if you weren't authorized to scratch
279 * the currently playing track. */
280 if(playing
->submitter
)
281 if(!strcmp(playing
->submitter
, c
->who
))
282 r
= RIGHT_SCRATCH_MINE
;
284 r
= RIGHT_SCRATCH_ANY
;
286 r
= RIGHT_SCRATCH_RANDOM
;
287 if(!(c
->rights
& r
)) {
288 sink_writes(ev_writer_sink(c
->w
),
289 "550 Not authorized to scratch that track\n");
292 scratch(c
->who
, nvec
== 1 ? vec
[0] : 0);
293 /* If you scratch an unpaused track then it is automatically unpaused */
295 sink_writes(ev_writer_sink(c
->w
), "250 scratched\n");
296 return 1; /* completed */
299 static int c_pause(struct conn
*c
,
300 char attribute((unused
)) **vec
,
301 int attribute((unused
)) nvec
) {
303 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
304 return 1; /* completed */
307 sink_writes(ev_writer_sink(c
->w
), "250 already paused\n");
308 return 1; /* completed */
310 if(pause_playing(c
->who
) < 0)
311 sink_writes(ev_writer_sink(c
->w
), "550 cannot pause this track\n");
313 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
317 static int c_resume(struct conn
*c
,
318 char attribute((unused
)) **vec
,
319 int attribute((unused
)) nvec
) {
321 sink_writes(ev_writer_sink(c
->w
), "250 not paused\n");
322 return 1; /* completed */
324 resume_playing(c
->who
);
325 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
329 static int c_shutdown(struct conn
*c
,
330 char attribute((unused
)) **vec
,
331 int attribute((unused
)) nvec
) {
332 info("S%x shut down by %s", c
->tag
, c
->who
);
333 sink_writes(ev_writer_sink(c
->w
), "250 shutting down\n");
334 ev_writer_flush(c
->w
);
338 static int c_reconfigure(struct conn
*c
,
339 char attribute((unused
)) **vec
,
340 int attribute((unused
)) nvec
) {
341 info("S%x reconfigure by %s", c
->tag
, c
->who
);
342 if(reconfigure(c
->ev
, 1))
343 sink_writes(ev_writer_sink(c
->w
), "550 error reading new config\n");
345 sink_writes(ev_writer_sink(c
->w
), "250 installed new config\n");
346 return 1; /* completed */
349 static int c_rescan(struct conn
*c
,
350 char attribute((unused
)) **vec
,
351 int attribute((unused
)) nvec
) {
352 info("S%x rescan by %s", c
->tag
, c
->who
);
353 trackdb_rescan(c
->ev
);
354 sink_writes(ev_writer_sink(c
->w
), "250 initiated rescan\n");
355 return 1; /* completed */
358 static int c_version(struct conn
*c
,
359 char attribute((unused
)) **vec
,
360 int attribute((unused
)) nvec
) {
361 /* VERSION had better only use the basic character set */
362 sink_printf(ev_writer_sink(c
->w
), "251 %s\n", disorder_short_version_string
);
363 return 1; /* completed */
366 static int c_playing(struct conn
*c
,
367 char attribute((unused
)) **vec
,
368 int attribute((unused
)) nvec
) {
370 queue_fix_sofar(playing
);
371 playing
->expected
= 0;
372 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", queue_marshall(playing
));
374 sink_printf(ev_writer_sink(c
->w
), "259 nothing playing\n");
375 return 1; /* completed */
378 static const char *connection_host(struct conn
*c
) {
381 struct sockaddr_in in
;
382 struct sockaddr_in6 in6
;
388 /* get connection data */
390 if(getpeername(c
->fd
, &u
.sa
, &l
) < 0) {
391 error(errno
, "S%x error calling getpeername", c
->tag
);
394 if(c
->l
->pf
!= PF_UNIX
) {
395 if((n
= getnameinfo(&u
.sa
, l
,
396 host
, sizeof host
, 0, 0, NI_NUMERICHOST
))) {
397 error(0, "S%x error calling getnameinfo: %s", c
->tag
, gai_strerror(n
));
400 return xstrdup(host
);
405 static int c_user(struct conn
*c
,
407 int attribute((unused
)) nvec
) {
409 const char *res
, *host
, *password
;
413 sink_writes(ev_writer_sink(c
->w
), "530 already authenticated\n");
416 /* get connection data */
417 if(!(host
= connection_host(c
))) {
418 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
422 k
= trackdb_getuserinfo(vec
[0]);
423 /* reject nonexistent users */
425 error(0, "S%x unknown user '%s' from %s", c
->tag
, vec
[0], host
);
426 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
429 /* reject unconfirmed users */
430 if(kvp_get(k
, "confirmation")) {
431 error(0, "S%x unconfirmed user '%s' from %s", c
->tag
, vec
[0], host
);
432 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
435 password
= kvp_get(k
, "password");
436 if(!password
) password
= "";
437 if(parse_rights(kvp_get(k
, "rights"), &rights
)) {
438 error(0, "error parsing rights for %s", vec
[0]);
439 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
442 /* check whether the response is right */
443 res
= authhash(c
->nonce
, sizeof c
->nonce
, password
,
444 config
->authorization_algorithm
);
445 if(wideopen
|| (res
&& !strcmp(res
, vec
[1]))) {
448 /* currently we only bother logging remote connections */
449 if(strcmp(host
, "local")) {
450 info("S%x %s connected from %s", c
->tag
, vec
[0], host
);
451 c
->rights
|= RIGHT__LOCAL
;
453 sink_writes(ev_writer_sink(c
->w
), "230 OK\n");
456 /* oops, response was wrong */
457 info("S%x authentication failure for %s from %s", c
->tag
, vec
[0], host
);
458 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
462 static int c_recent(struct conn
*c
,
463 char attribute((unused
)) **vec
,
464 int attribute((unused
)) nvec
) {
465 const struct queue_entry
*q
;
467 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
468 for(q
= phead
.next
; q
!= &phead
; q
= q
->next
)
469 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
470 sink_writes(ev_writer_sink(c
->w
), ".\n");
471 return 1; /* completed */
474 static int c_queue(struct conn
*c
,
475 char attribute((unused
)) **vec
,
476 int attribute((unused
)) nvec
) {
477 struct queue_entry
*q
;
482 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
483 if(playing_is_enabled() && !paused
) {
485 queue_fix_sofar(playing
);
486 if((l
= trackdb_get(playing
->track
, "_length"))
487 && (length
= atol(l
))) {
489 when
+= length
- playing
->sofar
+ config
->gap
;
492 /* Nothing is playing but playing is enabled, so whatever is
493 * first in the queue can be expected to start immediately. */
496 for(q
= qhead
.next
; q
!= &qhead
; q
= q
->next
) {
497 /* fill in estimated start time */
499 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
500 /* update for next track */
502 if((l
= trackdb_get(q
->track
, "_length"))
503 && (length
= atol(l
)))
504 when
+= length
+ config
->gap
;
509 sink_writes(ev_writer_sink(c
->w
), ".\n");
510 return 1; /* completed */
513 static int output_list(struct conn
*c
, char **vec
) {
515 sink_printf(ev_writer_sink(c
->w
), "%s\n", *vec
++);
516 sink_writes(ev_writer_sink(c
->w
), ".\n");
520 static int files_dirs(struct conn
*c
,
523 enum trackdb_listable what
) {
524 const char *dir
, *re
, *errstr
;
530 case 0: dir
= 0; re
= 0; break;
531 case 1: dir
= vec
[0]; re
= 0; break;
532 case 2: dir
= vec
[0]; re
= vec
[1]; break;
535 /* A bit of a bodge to make sure the args don't trample on cache keys */
536 if(dir
&& strchr(dir
, '\n')) {
537 sink_writes(ev_writer_sink(c
->w
), "550 invalid directory name\n");
540 if(re
&& strchr(re
, '\n')) {
541 sink_writes(ev_writer_sink(c
->w
), "550 invalid regexp\n");
544 /* We bother eliminating "" because the web interface is relatively
545 * likely to send it */
547 byte_xasprintf(&key
, "%d\n%s\n%s", (int)what
, dir ? dir
: "", re
);
548 fvec
= (char **)cache_get(&cache_files_type
, key
);
550 /* Got a cache hit, don't store the answer in the cache */
553 rec
= 0; /* quieten compiler */
555 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
557 if(!(rec
= pcre_compile(re
, PCRE_CASELESS
|PCRE_UTF8
,
558 &errstr
, &erroffset
, 0))) {
559 sink_printf(ev_writer_sink(c
->w
), "550 Error compiling regexp: %s\n",
563 /* It only counts as a miss if the regexp was valid. */
564 ++cache_files_misses
;
567 /* No regexp, don't bother caching the result */
573 /* No cache hit (either because a miss, or because we did not look) so do
576 fvec
= trackdb_list(dir
, 0, what
, rec
);
578 fvec
= trackdb_list(0, 0, what
, rec
);
581 /* Put the answer in the cache */
582 cache_put(&cache_files_type
, key
, fvec
);
583 sink_writes(ev_writer_sink(c
->w
), "253 Listing follow\n");
584 return output_list(c
, fvec
);
587 static int c_files(struct conn
*c
,
590 return files_dirs(c
, vec
, nvec
, trackdb_files
);
593 static int c_dirs(struct conn
*c
,
596 return files_dirs(c
, vec
, nvec
, trackdb_directories
);
599 static int c_allfiles(struct conn
*c
,
602 return files_dirs(c
, vec
, nvec
, trackdb_directories
|trackdb_files
);
605 static int c_get(struct conn
*c
,
607 int attribute((unused
)) nvec
) {
610 if(vec
[1][0] != '_' && (v
= trackdb_get(vec
[0], vec
[1])))
611 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(v
));
613 sink_writes(ev_writer_sink(c
->w
), "555 not found\n");
617 static int c_length(struct conn
*c
,
619 int attribute((unused
)) nvec
) {
620 const char *track
, *v
;
622 if(!(track
= trackdb_resolve(vec
[0]))) {
623 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
626 if((v
= trackdb_get(track
, "_length")))
627 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(v
));
629 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
633 static int c_set(struct conn
*c
,
635 int attribute((unused
)) nvec
) {
636 if(vec
[1][0] != '_' && !trackdb_set(vec
[0], vec
[1], vec
[2]))
637 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
639 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
643 static int c_prefs(struct conn
*c
,
645 int attribute((unused
)) nvec
) {
648 k
= trackdb_get_all(vec
[0]);
649 sink_writes(ev_writer_sink(c
->w
), "253 prefs follow\n");
650 for(; k
; k
= k
->next
)
651 if(k
->name
[0] != '_') /* omit internal values */
652 sink_printf(ev_writer_sink(c
->w
),
653 " %s %s\n", quoteutf8(k
->name
), quoteutf8(k
->value
));
654 sink_writes(ev_writer_sink(c
->w
), ".\n");
658 static int c_exists(struct conn
*c
,
660 int attribute((unused
)) nvec
) {
661 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[trackdb_exists(vec
[0])]);
665 static void search_parse_error(const char *msg
, void *u
) {
666 *(const char **)u
= msg
;
669 static int c_search(struct conn
*c
,
671 int attribute((unused
)) nvec
) {
672 char **terms
, **results
;
673 int nterms
, nresults
, n
;
674 const char *e
= "unknown error";
676 /* This is a bit of a bodge. Initially it's there to make the eclient
677 * interface a bit more convenient to add searching to, but it has the more
678 * compelling advantage that if everything uses it, then interpretation of
679 * user-supplied search strings will be the same everywhere. */
680 if(!(terms
= split(vec
[0], &nterms
, SPLIT_QUOTES
, search_parse_error
, &e
))) {
681 sink_printf(ev_writer_sink(c
->w
), "550 %s\n", e
);
683 results
= trackdb_search(terms
, nterms
, &nresults
);
684 sink_printf(ev_writer_sink(c
->w
), "253 %d matches\n", nresults
);
685 for(n
= 0; n
< nresults
; ++n
)
686 sink_printf(ev_writer_sink(c
->w
), "%s\n", results
[n
]);
687 sink_writes(ev_writer_sink(c
->w
), ".\n");
692 static int c_random_enable(struct conn
*c
,
693 char attribute((unused
)) **vec
,
694 int attribute((unused
)) nvec
) {
695 enable_random(c
->who
, c
->ev
);
696 /* Enable implicitly unpauses if there is nothing playing */
697 if(paused
&& !playing
) resume_playing(c
->who
);
698 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
699 return 1; /* completed */
702 static int c_random_disable(struct conn
*c
,
703 char attribute((unused
)) **vec
,
704 int attribute((unused
)) nvec
) {
705 disable_random(c
->who
);
706 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
707 return 1; /* completed */
710 static int c_random_enabled(struct conn
*c
,
711 char attribute((unused
)) **vec
,
712 int attribute((unused
)) nvec
) {
713 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[random_is_enabled()]);
714 return 1; /* completed */
717 static void got_stats(char *stats
, void *u
) {
718 struct conn
*const c
= u
;
720 sink_printf(ev_writer_sink(c
->w
), "253 stats\n%s\n.\n", stats
);
721 /* Now we can start processing commands again */
722 ev_reader_enable(c
->r
);
725 static int c_stats(struct conn
*c
,
726 char attribute((unused
)) **vec
,
727 int attribute((unused
)) nvec
) {
728 trackdb_stats_subprocess(c
->ev
, got_stats
, c
);
729 return 0; /* not yet complete */
732 static int c_volume(struct conn
*c
,
744 l
= r
= atoi(vec
[0]);
755 rights
= set ? RIGHT_VOLUME
: RIGHT_READ
;
756 if(!(c
->rights
& rights
)) {
757 sink_writes(ev_writer_sink(c
->w
), "530 Prohibited\n");
760 if(mixer_control(&l
, &r
, set
))
761 sink_writes(ev_writer_sink(c
->w
), "550 error accessing mixer\n");
763 sink_printf(ev_writer_sink(c
->w
), "252 %d %d\n", l
, r
);
764 if(l
!= volume_left
|| r
!= volume_right
) {
767 snprintf(lb
, sizeof lb
, "%d", l
);
768 snprintf(rb
, sizeof rb
, "%d", r
);
769 eventlog("volume", lb
, rb
, (char *)0);
775 /** @brief Called when data arrives on a log connection
777 * We just discard all such data. The client may occasionally send data as a
780 static int logging_reader_callback(ev_source
attribute((unused
)) *ev
,
782 void attribute((unused
)) *ptr
,
784 int attribute((unused
)) eof
,
785 void attribute((unused
)) *u
) {
788 ev_reader_consume(reader
, bytes
);
790 /* Oops, that's all for now */
791 D(("logging reader eof"));
794 ev_writer_close(c
->w
);
802 static void logclient(const char *msg
, void *user
) {
803 struct conn
*c
= user
;
806 /* This connection has gone up in smoke for some reason */
807 eventlog_remove(c
->lo
);
810 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" %s\n",
811 (uintmax_t)time(0), msg
);
814 static int c_log(struct conn
*c
,
815 char attribute((unused
)) **vec
,
816 int attribute((unused
)) nvec
) {
819 sink_writes(ev_writer_sink(c
->w
), "254 OK\n");
820 /* pump out initial state */
822 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
824 playing_is_enabled() ?
"enable_play" : "disable_play");
825 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
827 random_is_enabled() ?
"enable_random" : "disable_random");
828 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
830 paused ?
"pause" : "resume");
832 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state playing\n",
835 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" volume %d %d\n",
836 (uintmax_t)now
, volume_left
, volume_right
);
837 c
->lo
= xmalloc(sizeof *c
->lo
);
838 c
->lo
->fn
= logclient
;
841 c
->reader
= logging_reader_callback
;
845 /** @brief Test whether a move is allowed
846 * @param c Connection
847 * @param qs List of IDs on queue
848 * @param nqs Number of IDs
849 * @return 0 if move is prohibited, non-0 if it is allowed
851 static int has_move_rights(struct conn
*c
, struct queue_entry
**qs
, int nqs
) {
854 for(; nqs
> 0; ++qs
, --nqs
) {
855 struct queue_entry
*const q
= *qs
;
858 if(!strcmp(q
->submitter
, c
->who
))
859 r
|= RIGHT_MOVE_MINE
;
863 r
|= RIGHT_MOVE_RANDOM
;
865 return (c
->rights
& r
) == r
;
868 static int c_move(struct conn
*c
,
870 int attribute((unused
)) nvec
) {
871 struct queue_entry
*q
;
874 if(!(q
= queue_find(vec
[0]))) {
875 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
878 if(!has_move_rights(c
, &q
, 1)) {
879 sink_writes(ev_writer_sink(c
->w
),
880 "550 Not authorized to move that track\n");
883 n
= queue_move(q
, atoi(vec
[1]), c
->who
);
884 sink_printf(ev_writer_sink(c
->w
), "252 %d\n", n
);
885 /* If we've moved to the head of the queue then prepare the track. */
891 static int c_moveafter(struct conn
*c
,
893 int attribute((unused
)) nvec
) {
894 struct queue_entry
*q
, **qs
;
898 if(!(q
= queue_find(vec
[0]))) {
899 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
906 qs
= xcalloc(nvec
, sizeof *qs
);
907 for(n
= 0; n
< nvec
; ++n
)
908 if(!(qs
[n
] = queue_find(vec
[n
]))) {
909 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
912 if(!has_move_rights(c
, qs
, nvec
)) {
913 sink_writes(ev_writer_sink(c
->w
),
914 "550 Not authorized to move those tracks\n");
917 queue_moveafter(q
, nvec
, qs
, c
->who
);
918 sink_printf(ev_writer_sink(c
->w
), "250 Moved tracks\n");
919 /* If we've moved to the head of the queue then prepare the track. */
925 static int c_part(struct conn
*c
,
927 int attribute((unused
)) nvec
) {
928 sink_printf(ev_writer_sink(c
->w
), "252 %s\n",
929 quoteutf8(trackdb_getpart(vec
[0], vec
[1], vec
[2])));
933 static int c_resolve(struct conn
*c
,
935 int attribute((unused
)) nvec
) {
938 if(!(track
= trackdb_resolve(vec
[0]))) {
939 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
942 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(track
));
946 static int c_tags(struct conn
*c
,
947 char attribute((unused
)) **vec
,
948 int attribute((unused
)) nvec
) {
949 char **tags
= trackdb_alltags();
951 sink_printf(ev_writer_sink(c
->w
), "253 Tag list follows\n");
953 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
954 **tags
== '.' ?
"." : "", *tags
);
957 sink_writes(ev_writer_sink(c
->w
), ".\n");
958 return 1; /* completed */
961 static int c_set_global(struct conn
*c
,
963 int attribute((unused
)) nvec
) {
964 if(vec
[0][0] == '_') {
965 sink_writes(ev_writer_sink(c
->w
), "550 cannot set internal global preferences\n");
968 trackdb_set_global(vec
[0], vec
[1], c
->who
);
969 sink_printf(ev_writer_sink(c
->w
), "250 OK\n");
973 static int c_get_global(struct conn
*c
,
975 int attribute((unused
)) nvec
) {
976 const char *s
= trackdb_get_global(vec
[0]);
979 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(s
));
981 sink_writes(ev_writer_sink(c
->w
), "555 not found\n");
985 static int c_nop(struct conn
*c
,
986 char attribute((unused
)) **vec
,
987 int attribute((unused
)) nvec
) {
988 sink_printf(ev_writer_sink(c
->w
), "250 Quack\n");
992 static int c_new(struct conn
*c
,
995 char **tracks
= trackdb_new(0, nvec
> 0 ?
atoi(vec
[0]) : INT_MAX
);
997 sink_printf(ev_writer_sink(c
->w
), "253 New track list follows\n");
999 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
1000 **tracks
== '.' ?
"." : "", *tracks
);
1003 sink_writes(ev_writer_sink(c
->w
), ".\n");
1004 return 1; /* completed */
1008 static int c_rtp_address(struct conn
*c
,
1009 char attribute((unused
)) **vec
,
1010 int attribute((unused
)) nvec
) {
1011 if(config
->speaker_backend
== BACKEND_NETWORK
) {
1012 sink_printf(ev_writer_sink(c
->w
), "252 %s %s\n",
1013 quoteutf8(config
->broadcast
.s
[0]),
1014 quoteutf8(config
->broadcast
.s
[1]));
1016 sink_writes(ev_writer_sink(c
->w
), "550 No RTP\n");
1020 static int c_cookie(struct conn
*c
,
1022 int attribute((unused
)) nvec
) {
1027 /* Can't log in twice on the same connection */
1029 sink_writes(ev_writer_sink(c
->w
), "530 already authenticated\n");
1032 /* Get some kind of peer identifcation */
1033 if(!(host
= connection_host(c
))) {
1034 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
1037 /* Check the cookie */
1038 user
= verify_cookie(vec
[0], &rights
);
1040 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
1047 if(strcmp(host
, "local")) {
1048 info("S%x %s connected with cookie from %s", c
->tag
, user
, host
);
1049 c
->rights
|= RIGHT__LOCAL
;
1051 sink_writes(ev_writer_sink(c
->w
), "230 OK\n");
1055 static int c_make_cookie(struct conn
*c
,
1056 char attribute((unused
)) **vec
,
1057 int attribute((unused
)) nvec
) {
1058 const char *cookie
= make_cookie(c
->who
);
1061 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(cookie
));
1063 sink_writes(ev_writer_sink(c
->w
), "550 Cannot create cookie\n");
1067 static int c_revoke(struct conn
*c
,
1068 char attribute((unused
)) **vec
,
1069 int attribute((unused
)) nvec
) {
1071 revoke_cookie(c
->cookie
);
1072 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1074 sink_writes(ev_writer_sink(c
->w
), "550 Did not log in with cookie\n");
1078 static int c_adduser(struct conn
*c
,
1080 int attribute((unused
)) nvec
) {
1081 if(trackdb_adduser(vec
[0], vec
[1], config
->default_rights
,
1082 0/*email*/, 0/*confirmation*/))
1083 sink_writes(ev_writer_sink(c
->w
), "550 Cannot create user\n");
1085 sink_writes(ev_writer_sink(c
->w
), "250 User created\n");
1089 static int c_deluser(struct conn
*c
,
1091 int attribute((unused
)) nvec
) {
1092 if(trackdb_deluser(vec
[0]))
1093 sink_writes(ev_writer_sink(c
->w
), "550 Cannot delete user\n");
1095 sink_writes(ev_writer_sink(c
->w
), "250 User deleted\n");
1099 static int c_edituser(struct conn
*c
,
1101 int attribute((unused
)) nvec
) {
1102 /* RIGHT_ADMIN can do anything; otherwise you can only set your own email
1103 * address and password. */
1104 if((c
->rights
& RIGHT_ADMIN
)
1105 || (!strcmp(c
->who
, vec
[0])
1106 && (!strcmp(vec
[1], "email")
1107 || !strcmp(vec
[1], "password")))) {
1108 if(trackdb_edituserinfo(vec
[0], vec
[1], vec
[2]))
1109 sink_writes(ev_writer_sink(c
->w
), "550 Failed to change setting\n");
1111 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1113 sink_writes(ev_writer_sink(c
->w
), "550 Restricted to administrators\n");
1117 static int c_userinfo(struct conn
*c
,
1118 char attribute((unused
)) **vec
,
1119 int attribute((unused
)) nvec
) {
1123 /* RIGHT_ADMIN allows anything; otherwise you can only get your own email
1124 * address and righst list. */
1125 if((c
->rights
& RIGHT_ADMIN
)
1126 || (!strcmp(c
->who
, vec
[0])
1127 && (!strcmp(vec
[1], "email")
1128 || !strcmp(vec
[1], "rights")))) {
1129 if((k
= trackdb_getuserinfo(vec
[0])))
1130 if((value
= kvp_get(k
, vec
[1])))
1131 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(value
));
1133 sink_writes(ev_writer_sink(c
->w
), "555 Not set\n");
1135 sink_writes(ev_writer_sink(c
->w
), "550 No such user\n");
1137 sink_writes(ev_writer_sink(c
->w
), "550 Restricted to administrators\n");
1141 static int c_users(struct conn
*c
,
1142 char attribute((unused
)) **vec
,
1143 int attribute((unused
)) nvec
) {
1144 /* TODO de-dupe with c_tags */
1145 char **users
= trackdb_listusers();
1147 sink_writes(ev_writer_sink(c
->w
), "253 User list follows\n");
1149 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
1150 **users
== '.' ?
"." : "", *users
);
1153 sink_writes(ev_writer_sink(c
->w
), ".\n");
1154 return 1; /* completed */
1157 static int c_register(struct conn
*c
,
1159 int attribute((unused
)) nvec
) {
1164 /* The confirmation string is base64(username;nonce) */
1165 bufsize
= strlen(vec
[0]) + NONCE_SIZE
+ 2;
1166 buf
= xmalloc_noptr(bufsize
);
1167 offset
= byte_snprintf(buf
, bufsize
, "%s;", vec
[0]);
1168 gcry_randomize(buf
+ offset
, NONCE_SIZE
, GCRY_STRONG_RANDOM
);
1169 cs
= mime_to_base64((uint8_t *)buf
, offset
+ NONCE_SIZE
);
1170 if(trackdb_adduser(vec
[0], vec
[1], config
->default_rights
, vec
[2], cs
))
1171 sink_writes(ev_writer_sink(c
->w
), "550 Cannot create user\n");
1173 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(cs
));
1177 static int c_confirm(struct conn
*c
,
1179 int attribute((unused
)) nvec
) {
1183 if(!(user
= mime_base64(vec
[0], &nuser
))
1184 || !(sep
= memchr(user
, ';', nuser
))) {
1185 sink_writes(ev_writer_sink(c
->w
), "550 Malformed confirmation string\n");
1189 if(trackdb_confirm(user
, vec
[0]))
1190 sink_writes(ev_writer_sink(c
->w
), "550 Incorrect confirmation string\n");
1192 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1196 static const struct command
{
1197 /** @brief Command name */
1200 /** @brief Minimum number of arguments */
1203 /** @brief Maximum number of arguments */
1206 /** @brief Function to process command */
1207 int (*fn
)(struct conn
*, char **, int);
1209 /** @brief Rights required to execute command
1211 * 0 means that the command can be issued without logging in. If multiple
1212 * bits are listed here any of those rights will do.
1216 { "adduser", 2, 2, c_adduser
, RIGHT_ADMIN
|RIGHT__LOCAL
},
1217 { "allfiles", 0, 2, c_allfiles
, RIGHT_READ
},
1218 { "confirm", 1, 1, c_confirm
, 0 },
1219 { "cookie", 1, 1, c_cookie
, 0 },
1220 { "deluser", 1, 1, c_deluser
, RIGHT_ADMIN
|RIGHT__LOCAL
},
1221 { "dirs", 0, 2, c_dirs
, RIGHT_READ
},
1222 { "disable", 0, 1, c_disable
, RIGHT_GLOBAL_PREFS
},
1223 { "edituser", 3, 3, c_edituser
, RIGHT_ADMIN
|RIGHT_USERINFO
},
1224 { "enable", 0, 0, c_enable
, RIGHT_GLOBAL_PREFS
},
1225 { "enabled", 0, 0, c_enabled
, RIGHT_READ
},
1226 { "exists", 1, 1, c_exists
, RIGHT_READ
},
1227 { "files", 0, 2, c_files
, RIGHT_READ
},
1228 { "get", 2, 2, c_get
, RIGHT_READ
},
1229 { "get-global", 1, 1, c_get_global
, RIGHT_READ
},
1230 { "length", 1, 1, c_length
, RIGHT_READ
},
1231 { "log", 0, 0, c_log
, RIGHT_READ
},
1232 { "make-cookie", 0, 0, c_make_cookie
, RIGHT_READ
},
1233 { "move", 2, 2, c_move
, RIGHT_MOVE__MASK
},
1234 { "moveafter", 1, INT_MAX
, c_moveafter
, RIGHT_MOVE__MASK
},
1235 { "new", 0, 1, c_new
, RIGHT_READ
},
1236 { "nop", 0, 0, c_nop
, 0 },
1237 { "part", 3, 3, c_part
, RIGHT_READ
},
1238 { "pause", 0, 0, c_pause
, RIGHT_PAUSE
},
1239 { "play", 1, 1, c_play
, RIGHT_PLAY
},
1240 { "playing", 0, 0, c_playing
, RIGHT_READ
},
1241 { "prefs", 1, 1, c_prefs
, RIGHT_READ
},
1242 { "queue", 0, 0, c_queue
, RIGHT_READ
},
1243 { "random-disable", 0, 0, c_random_disable
, RIGHT_GLOBAL_PREFS
},
1244 { "random-enable", 0, 0, c_random_enable
, RIGHT_GLOBAL_PREFS
},
1245 { "random-enabled", 0, 0, c_random_enabled
, RIGHT_READ
},
1246 { "recent", 0, 0, c_recent
, RIGHT_READ
},
1247 { "reconfigure", 0, 0, c_reconfigure
, RIGHT_ADMIN
},
1248 { "register", 3, 3, c_register
, RIGHT_REGISTER
|RIGHT__LOCAL
},
1249 { "remove", 1, 1, c_remove
, RIGHT_REMOVE__MASK
},
1250 { "rescan", 0, 0, c_rescan
, RIGHT_RESCAN
},
1251 { "resolve", 1, 1, c_resolve
, RIGHT_READ
},
1252 { "resume", 0, 0, c_resume
, RIGHT_PAUSE
},
1253 { "revoke", 0, 0, c_revoke
, RIGHT_READ
},
1254 { "rtp-address", 0, 0, c_rtp_address
, 0 },
1255 { "scratch", 0, 1, c_scratch
, RIGHT_SCRATCH__MASK
},
1256 { "search", 1, 1, c_search
, RIGHT_READ
},
1257 { "set", 3, 3, c_set
, RIGHT_PREFS
, },
1258 { "set-global", 2, 2, c_set_global
, RIGHT_GLOBAL_PREFS
},
1259 { "shutdown", 0, 0, c_shutdown
, RIGHT_ADMIN
},
1260 { "stats", 0, 0, c_stats
, RIGHT_READ
},
1261 { "tags", 0, 0, c_tags
, RIGHT_READ
},
1262 { "unset", 2, 2, c_set
, RIGHT_PREFS
},
1263 { "unset-global", 1, 1, c_set_global
, RIGHT_GLOBAL_PREFS
},
1264 { "user", 2, 2, c_user
, 0 },
1265 { "userinfo", 2, 2, c_userinfo
, RIGHT_READ
},
1266 { "users", 0, 0, c_users
, RIGHT_READ
},
1267 { "version", 0, 0, c_version
, RIGHT_READ
},
1268 { "volume", 0, 2, c_volume
, RIGHT_READ
|RIGHT_VOLUME
}
1271 static void command_error(const char *msg
, void *u
) {
1274 sink_printf(ev_writer_sink(c
->w
), "500 parse error: %s\n", msg
);
1277 /* process a command. Return 1 if complete, 0 if incomplete. */
1278 static int command(struct conn
*c
, char *line
) {
1282 D(("server command %s", line
));
1283 /* We force everything into NFC as early as possible */
1284 if(!(line
= utf8_compose_canon(line
, strlen(line
), 0))) {
1285 sink_writes(ev_writer_sink(c
->w
), "500 cannot normalize command\n");
1288 if(!(vec
= split(line
, &nvec
, SPLIT_QUOTES
, command_error
, c
))) {
1289 sink_writes(ev_writer_sink(c
->w
), "500 cannot parse command\n");
1293 sink_writes(ev_writer_sink(c
->w
), "500 do what?\n");
1296 if((n
= TABLE_FIND(commands
, struct command
, name
, vec
[0])) < 0)
1297 sink_writes(ev_writer_sink(c
->w
), "500 unknown command\n");
1299 if(commands
[n
].rights
1300 && !(c
->rights
& commands
[n
].rights
)) {
1301 sink_writes(ev_writer_sink(c
->w
), "530 Prohibited\n");
1306 if(nvec
< commands
[n
].minargs
) {
1307 sink_writes(ev_writer_sink(c
->w
), "500 missing argument(s)\n");
1310 if(nvec
> commands
[n
].maxargs
) {
1311 sink_writes(ev_writer_sink(c
->w
), "500 too many arguments\n");
1314 return commands
[n
].fn(c
, vec
, nvec
);
1316 return 1; /* completed */
1319 /* redirect to the right reader callback for our current state */
1320 static int redirect_reader_callback(ev_source
*ev
,
1328 return c
->reader(ev
, reader
, ptr
, bytes
, eof
, u
);
1331 /* the main command reader */
1332 static int reader_callback(ev_source
attribute((unused
)) *ev
,
1342 D(("server reader_callback"));
1343 while((eol
= memchr(ptr
, '\n', bytes
))) {
1345 ev_reader_consume(reader
, eol
- (char *)ptr
);
1346 complete
= command(c
, ptr
);
1347 bytes
-= (eol
- (char *)ptr
);
1350 /* the command had better have set a new reader callback */
1352 /* there are further bytes to read, or we are at eof; arrange for the
1353 * command's reader callback to handle them */
1354 return ev_reader_incomplete(reader
);
1355 /* nothing's going on right now */
1358 /* command completed, we can go around and handle the next one */
1362 error(0, "S%x unterminated line", c
->tag
);
1363 D(("normal reader close"));
1366 D(("close associated writer"));
1367 ev_writer_close(c
->w
);
1374 static int listen_callback(ev_source
*ev
,
1376 const struct sockaddr
attribute((unused
)) *remote
,
1377 socklen_t
attribute((unused
)) rlen
,
1379 const struct listener
*l
= u
;
1380 struct conn
*c
= xmalloc(sizeof *c
);
1381 static unsigned tags
;
1383 D(("server listen_callback fd %d (%s)", fd
, l
->name
));
1388 c
->w
= ev_writer_new(ev
, fd
, writer_error
, c
,
1390 c
->r
= ev_reader_new(ev
, fd
, redirect_reader_callback
, reader_error
, c
,
1394 c
->reader
= reader_callback
;
1397 gcry_randomize(c
->nonce
, sizeof c
->nonce
, GCRY_STRONG_RANDOM
);
1398 sink_printf(ev_writer_sink(c
->w
), "231 %d %s %s\n",
1400 config
->authorization_algorithm
,
1401 hex(c
->nonce
, sizeof c
->nonce
));
1405 int server_start(ev_source
*ev
, int pf
,
1406 size_t socklen
, const struct sockaddr
*sa
,
1409 struct listener
*l
= xmalloc(sizeof *l
);
1410 static const int one
= 1;
1412 D(("server_init socket %s", name
));
1413 fd
= xsocket(pf
, SOCK_STREAM
, 0);
1414 xsetsockopt(fd
, SOL_SOCKET
, SO_REUSEADDR
, &one
, sizeof one
);
1415 if(bind(fd
, sa
, socklen
) < 0) {
1416 error(errno
, "error binding to %s", name
);
1424 if(ev_listen(ev
, fd
, listen_callback
, l
, "server listener"))
1429 int server_stop(ev_source
*ev
, int fd
) {
1431 return ev_listen_cancel(ev
, fd
);