2 * This file is part of DisOrder.
3 * Copyright (C) 2004, 2005, 2006 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>
51 #include "configuration.h"
61 #include "trackname.h"
67 # define NONCE_SIZE 16
70 int volume_left
, volume_right
; /* last known volume */
72 /** @brief Accept all well-formed login attempts
90 unsigned char nonce
[NONCE_SIZE
];
91 ev_reader_callback
*reader
;
92 struct eventlog_output
*lo
;
93 const struct listener
*l
;
96 static int reader_callback(ev_source
*ev
,
104 static const char *noyes
[] = { "no", "yes" };
106 static int writer_error(ev_source
attribute((unused
)) *ev
,
112 D(("server writer_error %d %d", fd
, errno_value
));
113 if(errno_value
== 0) {
117 D(("server writer_error closes %d", fd
));
118 xclose(fd
); /* reader is done too, close */
120 D(("server writer_error shutdown %d SHUT_WR", fd
));
121 xshutdown(fd
, SHUT_WR
); /* reader is not done yet */
124 if(errno_value
!= EPIPE
)
125 error(errno_value
, "S%x write error on socket", c
->tag
);
127 ev_reader_cancel(c
->r
);
133 static int reader_error(ev_source
attribute((unused
)) *ev
,
139 D(("server reader_error %d %d", fd
, errno_value
));
140 error(errno
, "S%x read error on socket", c
->tag
);
141 ev_writer_cancel(c
->w
);
146 /* return true if we are talking to a trusted user */
147 static int trusted(struct conn
*c
) {
150 for(n
= 0; (n
< config
->trust
.n
151 && strcmp(config
->trust
.s
[n
], c
->who
)); ++n
)
153 return n
< config
->trust
.n
;
156 static int c_disable(struct conn
*c
, char **vec
, int nvec
) {
158 disable_playing(c
->who
);
159 else if(nvec
== 1 && !strcmp(vec
[0], "now"))
160 disable_playing(c
->who
);
162 sink_writes(ev_writer_sink(c
->w
), "550 invalid argument\n");
163 return 1; /* completed */
165 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
166 return 1; /* completed */
169 static int c_enable(struct conn
*c
,
170 char attribute((unused
)) **vec
,
171 int attribute((unused
)) nvec
) {
172 enable_playing(c
->who
, c
->ev
);
173 /* Enable implicitly unpauses if there is nothing playing */
174 if(paused
&& !playing
) resume_playing(c
->who
);
175 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
176 return 1; /* completed */
179 static int c_enabled(struct conn
*c
,
180 char attribute((unused
)) **vec
,
181 int attribute((unused
)) nvec
) {
182 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[playing_is_enabled()]);
183 return 1; /* completed */
186 static int c_play(struct conn
*c
, char **vec
,
187 int attribute((unused
)) nvec
) {
189 struct queue_entry
*q
;
191 if(!trackdb_exists(vec
[0])) {
192 sink_writes(ev_writer_sink(c
->w
), "550 track is not in database\n");
195 if(!(track
= trackdb_resolve(vec
[0]))) {
196 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
199 q
= queue_add(track
, c
->who
, WHERE_BEFORE_RANDOM
);
201 /* If we added the first track, and something is playing, then prepare the
202 * new track. If nothing is playing then we don't bother as it wouldn't gain
204 if(q
== qhead
.next
&& playing
)
206 sink_writes(ev_writer_sink(c
->w
), "250 queued\n");
207 /* If the queue was empty but we are for some reason paused then
209 if(!playing
) resume_playing(0);
211 return 1; /* completed */
214 static int c_remove(struct conn
*c
, char **vec
,
215 int attribute((unused
)) nvec
) {
216 struct queue_entry
*q
;
218 if(!(q
= queue_find(vec
[0]))) {
219 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
222 if(config
->restrictions
& RESTRICT_REMOVE
) {
223 /* can only remove tracks that you submitted */
224 if(!q
->submitter
|| strcmp(q
->submitter
, c
->who
)) {
225 sink_writes(ev_writer_sink(c
->w
), "550 you didn't submit that track!\n");
229 queue_remove(q
, c
->who
);
230 /* De-prepare the track. */
232 /* If we removed the random track then add another one. */
233 if(q
->state
== playing_random
)
235 /* Prepare whatever the next head track is. */
236 if(qhead
.next
!= &qhead
)
237 prepare(c
->ev
, qhead
.next
);
239 sink_writes(ev_writer_sink(c
->w
), "250 removed\n");
240 return 1; /* completed */
243 static int c_scratch(struct conn
*c
,
247 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
248 return 1; /* completed */
250 if(config
->restrictions
& RESTRICT_SCRATCH
) {
251 /* can only scratch tracks you submitted and randomly selected ones */
252 if(playing
->submitter
&& strcmp(playing
->submitter
, c
->who
)) {
253 sink_writes(ev_writer_sink(c
->w
), "550 you didn't submit that track!\n");
257 scratch(c
->who
, nvec
== 1 ? vec
[0] : 0);
258 /* If you scratch an unpaused track then it is automatically unpaused */
260 sink_writes(ev_writer_sink(c
->w
), "250 scratched\n");
261 return 1; /* completed */
264 static int c_pause(struct conn
*c
,
265 char attribute((unused
)) **vec
,
266 int attribute((unused
)) nvec
) {
268 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
269 return 1; /* completed */
272 sink_writes(ev_writer_sink(c
->w
), "250 already paused\n");
273 return 1; /* completed */
275 if(pause_playing(c
->who
) < 0)
276 sink_writes(ev_writer_sink(c
->w
), "550 cannot pause this track\n");
278 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
282 static int c_resume(struct conn
*c
,
283 char attribute((unused
)) **vec
,
284 int attribute((unused
)) nvec
) {
286 sink_writes(ev_writer_sink(c
->w
), "250 not paused\n");
287 return 1; /* completed */
289 resume_playing(c
->who
);
290 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
294 static int c_shutdown(struct conn
*c
,
295 char attribute((unused
)) **vec
,
296 int attribute((unused
)) nvec
) {
297 info("S%x shut down by %s", c
->tag
, c
->who
);
298 sink_writes(ev_writer_sink(c
->w
), "250 shutting down\n");
299 ev_writer_flush(c
->w
);
303 static int c_reconfigure(struct conn
*c
,
304 char attribute((unused
)) **vec
,
305 int attribute((unused
)) nvec
) {
306 info("S%x reconfigure by %s", c
->tag
, c
->who
);
307 if(reconfigure(c
->ev
, 1))
308 sink_writes(ev_writer_sink(c
->w
), "550 error reading new config\n");
310 sink_writes(ev_writer_sink(c
->w
), "250 installed new config\n");
311 return 1; /* completed */
314 static int c_rescan(struct conn
*c
,
315 char attribute((unused
)) **vec
,
316 int attribute((unused
)) nvec
) {
317 info("S%x rescan by %s", c
->tag
, c
->who
);
318 trackdb_rescan(c
->ev
);
319 sink_writes(ev_writer_sink(c
->w
), "250 initiated rescan\n");
320 return 1; /* completed */
323 static int c_version(struct conn
*c
,
324 char attribute((unused
)) **vec
,
325 int attribute((unused
)) nvec
) {
326 /* VERSION had better only use the basic character set */
327 sink_printf(ev_writer_sink(c
->w
), "251 %s\n", disorder_version_string
);
328 return 1; /* completed */
331 static int c_playing(struct conn
*c
,
332 char attribute((unused
)) **vec
,
333 int attribute((unused
)) nvec
) {
335 queue_fix_sofar(playing
);
336 playing
->expected
= 0;
337 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", queue_marshall(playing
));
339 sink_printf(ev_writer_sink(c
->w
), "259 nothing playing\n");
340 return 1; /* completed */
343 static int c_become(struct conn
*c
,
345 int attribute((unused
)) nvec
) {
347 sink_writes(ev_writer_sink(c
->w
), "230 OK\n");
351 static int c_user(struct conn
*c
,
353 int attribute((unused
)) nvec
) {
358 struct sockaddr_in in
;
359 struct sockaddr_in6 in6
;
365 sink_writes(ev_writer_sink(c
->w
), "530 already authenticated\n");
368 /* get connection data */
370 if(getpeername(c
->fd
, &u
.sa
, &l
) < 0) {
371 error(errno
, "S%x error calling getpeername", c
->tag
);
372 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
375 if(c
->l
->pf
!= PF_UNIX
) {
376 if((n
= getnameinfo(&u
.sa
, l
,
377 host
, sizeof host
, 0, 0, NI_NUMERICHOST
))) {
378 error(0, "S%x error calling getnameinfo: %s", c
->tag
, gai_strerror(n
));
379 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
383 strcpy(host
, "local");
385 for(n
= 0; n
< config
->allow
.n
386 && strcmp(config
->allow
.s
[n
].s
[0], vec
[0]); ++n
)
388 /* if it's a real user check whether the response is right */
389 if(n
>= config
->allow
.n
) {
390 info("S%x unknown user '%s' from %s", c
->tag
, vec
[0], host
);
391 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
394 res
= authhash(c
->nonce
, sizeof c
->nonce
, config
->allow
.s
[n
].s
[1]);
395 if(wideopen
|| (res
&& !strcmp(res
, vec
[1]))) {
397 /* currently we only bother logging remote connections */
398 if(c
->l
->pf
!= PF_UNIX
)
399 info("S%x %s connected from %s", c
->tag
, vec
[0], host
);
400 sink_writes(ev_writer_sink(c
->w
), "230 OK\n");
403 /* oops, response was wrong */
404 info("S%x authentication failure for %s from %s", c
->tag
, vec
[0], host
);
405 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
409 static int c_recent(struct conn
*c
,
410 char attribute((unused
)) **vec
,
411 int attribute((unused
)) nvec
) {
412 const struct queue_entry
*q
;
414 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
415 for(q
= phead
.next
; q
!= &phead
; q
= q
->next
)
416 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
417 sink_writes(ev_writer_sink(c
->w
), ".\n");
418 return 1; /* completed */
421 static int c_queue(struct conn
*c
,
422 char attribute((unused
)) **vec
,
423 int attribute((unused
)) nvec
) {
424 struct queue_entry
*q
;
429 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
430 if(playing_is_enabled() && !paused
) {
432 queue_fix_sofar(playing
);
433 if((l
= trackdb_get(playing
->track
, "_length"))
434 && (length
= atol(l
))) {
436 when
+= length
- playing
->sofar
+ config
->gap
;
439 /* Nothing is playing but playing is enabled, so whatever is
440 * first in the queue can be expected to start immediately. */
443 for(q
= qhead
.next
; q
!= &qhead
; q
= q
->next
) {
444 /* fill in estimated start time */
446 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
447 /* update for next track */
449 if((l
= trackdb_get(q
->track
, "_length"))
450 && (length
= atol(l
)))
451 when
+= length
+ config
->gap
;
456 sink_writes(ev_writer_sink(c
->w
), ".\n");
457 return 1; /* completed */
460 static int output_list(struct conn
*c
, char **vec
) {
462 sink_printf(ev_writer_sink(c
->w
), "%s\n", *vec
++);
463 sink_writes(ev_writer_sink(c
->w
), ".\n");
467 static int files_dirs(struct conn
*c
,
470 enum trackdb_listable what
) {
471 const char *dir
, *re
, *errstr
;
477 case 0: dir
= 0; re
= 0; break;
478 case 1: dir
= vec
[0]; re
= 0; break;
479 case 2: dir
= vec
[0]; re
= vec
[1]; break;
482 /* A bit of a bodge to make sure the args don't trample on cache keys */
483 if(dir
&& strchr(dir
, '\n')) {
484 sink_writes(ev_writer_sink(c
->w
), "550 invalid directory name\n");
487 if(re
&& strchr(re
, '\n')) {
488 sink_writes(ev_writer_sink(c
->w
), "550 invalid regexp\n");
491 /* We bother eliminating "" because the web interface is relatively
492 * likely to send it */
494 byte_xasprintf(&key
, "%d\n%s\n%s", (int)what
, dir ? dir
: "", re
);
495 fvec
= (char **)cache_get(&cache_files_type
, key
);
497 /* Got a cache hit, don't store the answer in the cache */
500 rec
= 0; /* quieten compiler */
502 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
504 if(!(rec
= pcre_compile(re
, PCRE_CASELESS
|PCRE_UTF8
,
505 &errstr
, &erroffset
, 0))) {
506 sink_printf(ev_writer_sink(c
->w
), "550 Error compiling regexp: %s\n",
510 /* It only counts as a miss if the regexp was valid. */
511 ++cache_files_misses
;
514 /* No regexp, don't bother caching the result */
520 /* No cache hit (either because a miss, or because we did not look) so do
523 fvec
= trackdb_list(dir
, 0, what
, rec
);
525 fvec
= trackdb_list(0, 0, what
, rec
);
528 /* Put the answer in the cache */
529 cache_put(&cache_files_type
, key
, fvec
);
530 sink_writes(ev_writer_sink(c
->w
), "253 Listing follow\n");
531 return output_list(c
, fvec
);
534 static int c_files(struct conn
*c
,
537 return files_dirs(c
, vec
, nvec
, trackdb_files
);
540 static int c_dirs(struct conn
*c
,
543 return files_dirs(c
, vec
, nvec
, trackdb_directories
);
546 static int c_allfiles(struct conn
*c
,
549 return files_dirs(c
, vec
, nvec
, trackdb_directories
|trackdb_files
);
552 static int c_get(struct conn
*c
,
554 int attribute((unused
)) nvec
) {
557 if(vec
[1][0] != '_' && (v
= trackdb_get(vec
[0], vec
[1])))
558 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", v
);
560 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
564 static int c_length(struct conn
*c
,
566 int attribute((unused
)) nvec
) {
567 const char *track
, *v
;
569 if(!(track
= trackdb_resolve(vec
[0]))) {
570 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
573 if((v
= trackdb_get(track
, "_length")))
574 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", v
);
576 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
580 static int c_set(struct conn
*c
,
582 int attribute((unused
)) nvec
) {
583 if(vec
[1][0] != '_' && !trackdb_set(vec
[0], vec
[1], vec
[2]))
584 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
586 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
590 static int c_prefs(struct conn
*c
,
592 int attribute((unused
)) nvec
) {
595 k
= trackdb_get_all(vec
[0]);
596 sink_writes(ev_writer_sink(c
->w
), "253 prefs follow\n");
597 for(; k
; k
= k
->next
)
598 if(k
->name
[0] != '_') /* omit internal values */
599 sink_printf(ev_writer_sink(c
->w
),
600 " %s %s\n", quoteutf8(k
->name
), quoteutf8(k
->value
));
601 sink_writes(ev_writer_sink(c
->w
), ".\n");
605 static int c_exists(struct conn
*c
,
607 int attribute((unused
)) nvec
) {
608 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[trackdb_exists(vec
[0])]);
612 static void search_parse_error(const char *msg
, void *u
) {
613 *(const char **)u
= msg
;
616 static int c_search(struct conn
*c
,
618 int attribute((unused
)) nvec
) {
619 char **terms
, **results
;
620 int nterms
, nresults
, n
;
621 const char *e
= "unknown error";
623 /* This is a bit of a bodge. Initially it's there to make the eclient
624 * interface a bit more convenient to add searching to, but it has the more
625 * compelling advantage that if everything uses it, then interpretation of
626 * user-supplied search strings will be the same everywhere. */
627 if(!(terms
= split(vec
[0], &nterms
, SPLIT_QUOTES
, search_parse_error
, &e
))) {
628 sink_printf(ev_writer_sink(c
->w
), "550 %s\n", e
);
630 results
= trackdb_search(terms
, nterms
, &nresults
);
631 sink_printf(ev_writer_sink(c
->w
), "253 %d matches\n", nresults
);
632 for(n
= 0; n
< nresults
; ++n
)
633 sink_printf(ev_writer_sink(c
->w
), "%s\n", results
[n
]);
634 sink_writes(ev_writer_sink(c
->w
), ".\n");
639 static int c_random_enable(struct conn
*c
,
640 char attribute((unused
)) **vec
,
641 int attribute((unused
)) nvec
) {
642 enable_random(c
->who
, c
->ev
);
643 /* Enable implicitly unpauses if there is nothing playing */
644 if(paused
&& !playing
) resume_playing(c
->who
);
645 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
646 return 1; /* completed */
649 static int c_random_disable(struct conn
*c
,
650 char attribute((unused
)) **vec
,
651 int attribute((unused
)) nvec
) {
652 disable_random(c
->who
);
653 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
654 return 1; /* completed */
657 static int c_random_enabled(struct conn
*c
,
658 char attribute((unused
)) **vec
,
659 int attribute((unused
)) nvec
) {
660 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[random_is_enabled()]);
661 return 1; /* completed */
664 static int c_stats(struct conn
*c
,
665 char attribute((unused
)) **vec
,
666 int attribute((unused
)) nvec
) {
670 v
= trackdb_stats(&nv
);
671 sink_printf(ev_writer_sink(c
->w
), "253 stats\n");
672 for(n
= 0; n
< nv
; ++n
) {
674 sink_writes(ev_writer_sink(c
->w
), ".");
675 sink_printf(ev_writer_sink(c
->w
), "%s\n", v
[n
]);
677 sink_writes(ev_writer_sink(c
->w
), ".\n");
681 static int c_volume(struct conn
*c
,
692 l
= r
= atoi(vec
[0]);
703 if(mixer_control(&l
, &r
, set
))
704 sink_writes(ev_writer_sink(c
->w
), "550 error accessing mixer\n");
706 sink_printf(ev_writer_sink(c
->w
), "252 %d %d\n", l
, r
);
707 if(l
!= volume_left
|| r
!= volume_right
) {
710 snprintf(lb
, sizeof lb
, "%d", l
);
711 snprintf(rb
, sizeof rb
, "%d", r
);
712 eventlog("volume", lb
, rb
, (char *)0);
718 /* we are logging, and some data is available to read */
719 static int logging_reader_callback(ev_source
*ev
,
728 /* don't log to this conn any more */
729 eventlog_remove(c
->lo
);
730 /* terminate the log output */
731 sink_writes(ev_writer_sink(c
->w
), ".\n");
732 /* restore the reader callback */
733 c
->reader
= reader_callback
;
734 /* ...and exit via it */
735 return c
->reader(ev
, reader
, fd
, ptr
, bytes
, eof
, u
);
738 static void logclient(const char *msg
, void *user
) {
739 struct conn
*c
= user
;
741 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" %s\n",
742 (uintmax_t)time(0), msg
);
745 static int c_log(struct conn
*c
,
746 char attribute((unused
)) **vec
,
747 int attribute((unused
)) nvec
) {
750 sink_writes(ev_writer_sink(c
->w
), "254 OK\n");
751 /* pump out initial state */
753 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
755 playing_is_enabled() ?
"enable_play" : "disable_play");
756 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
758 random_is_enabled() ?
"enable_random" : "disable_random");
759 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
761 paused ?
"pause" : "resume");
762 c
->lo
= xmalloc(sizeof *c
->lo
);
763 c
->lo
->fn
= logclient
;
766 c
->reader
= logging_reader_callback
;
770 static void post_move_cleanup(void) {
771 struct queue_entry
*q
;
773 /* If we have caused the random track to not be at the end then we make it no
774 * longer be random. */
775 for(q
= qhead
.next
; q
!= &qhead
; q
= q
->next
)
776 if(q
->state
== playing_random
&& q
->next
!= &qhead
)
777 q
->state
= playing_unplayed
;
778 /* That might mean we need to add a new random track. */
783 static int c_move(struct conn
*c
,
785 int attribute((unused
)) nvec
) {
786 struct queue_entry
*q
;
789 if(config
->restrictions
& RESTRICT_MOVE
) {
791 sink_writes(ev_writer_sink(c
->w
),
792 "550 only trusted users can move tracks\n");
796 if(!(q
= queue_find(vec
[0]))) {
797 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
800 n
= queue_move(q
, atoi(vec
[1]), c
->who
);
802 sink_printf(ev_writer_sink(c
->w
), "252 %d\n", n
);
803 /* If we've moved to the head of the queue then prepare the track. */
809 static int c_moveafter(struct conn
*c
,
811 int attribute((unused
)) nvec
) {
812 struct queue_entry
*q
, **qs
;
815 if(config
->restrictions
& RESTRICT_MOVE
) {
817 sink_writes(ev_writer_sink(c
->w
),
818 "550 only trusted users can move tracks\n");
823 if(!(q
= queue_find(vec
[0]))) {
824 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
831 qs
= xcalloc(nvec
, sizeof *qs
);
832 for(n
= 0; n
< nvec
; ++n
)
833 if(!(qs
[n
] = queue_find(vec
[n
]))) {
834 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
837 queue_moveafter(q
, nvec
, qs
, c
->who
);
839 sink_printf(ev_writer_sink(c
->w
), "250 Moved tracks\n");
840 /* If we've moved to the head of the queue then prepare the track. */
846 static int c_part(struct conn
*c
,
848 int attribute((unused
)) nvec
) {
849 sink_printf(ev_writer_sink(c
->w
), "252 %s\n",
850 trackdb_getpart(vec
[0], vec
[1], vec
[2]));
854 static int c_resolve(struct conn
*c
,
856 int attribute((unused
)) nvec
) {
859 if(!(track
= trackdb_resolve(vec
[0]))) {
860 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
863 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", track
);
867 static int c_tags(struct conn
*c
,
868 char attribute((unused
)) **vec
,
869 int attribute((unused
)) nvec
) {
870 char **tags
= trackdb_alltags();
872 sink_printf(ev_writer_sink(c
->w
), "253 Tag list follows\n");
874 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
875 **tags
== '.' ?
"." : "", *tags
);
878 sink_writes(ev_writer_sink(c
->w
), ".\n");
879 return 1; /* completed */
883 static int c_set_global(struct conn
*c
,
885 int attribute((unused
)) nvec
) {
886 trackdb_set_global(vec
[0], vec
[1], c
->who
);
887 sink_printf(ev_writer_sink(c
->w
), "250 OK\n");
891 static int c_get_global(struct conn
*c
,
893 int attribute((unused
)) nvec
) {
894 const char *s
= trackdb_get_global(vec
[0]);
897 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", s
);
899 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
903 #define C_AUTH 0001 /* must be authenticated */
904 #define C_TRUSTED 0002 /* must be trusted user */
906 static const struct command
{
908 int minargs
, maxargs
;
909 int (*fn
)(struct conn
*, char **, int);
912 { "allfiles", 0, 2, c_allfiles
, C_AUTH
},
913 { "become", 1, 1, c_become
, C_AUTH
|C_TRUSTED
},
914 { "dirs", 0, 2, c_dirs
, C_AUTH
},
915 { "disable", 0, 1, c_disable
, C_AUTH
},
916 { "enable", 0, 0, c_enable
, C_AUTH
},
917 { "enabled", 0, 0, c_enabled
, C_AUTH
},
918 { "exists", 1, 1, c_exists
, C_AUTH
},
919 { "files", 0, 2, c_files
, C_AUTH
},
920 { "get", 2, 2, c_get
, C_AUTH
},
921 { "get-global", 1, 1, c_get_global
, C_AUTH
},
922 { "length", 1, 1, c_length
, C_AUTH
},
923 { "log", 0, 0, c_log
, C_AUTH
},
924 { "move", 2, 2, c_move
, C_AUTH
},
925 { "moveafter", 1, INT_MAX
, c_moveafter
, C_AUTH
},
926 { "part", 3, 3, c_part
, C_AUTH
},
927 { "pause", 0, 0, c_pause
, C_AUTH
},
928 { "play", 1, 1, c_play
, C_AUTH
},
929 { "playing", 0, 0, c_playing
, C_AUTH
},
930 { "prefs", 1, 1, c_prefs
, C_AUTH
},
931 { "queue", 0, 0, c_queue
, C_AUTH
},
932 { "random-disable", 0, 0, c_random_disable
, C_AUTH
},
933 { "random-enable", 0, 0, c_random_enable
, C_AUTH
},
934 { "random-enabled", 0, 0, c_random_enabled
, C_AUTH
},
935 { "recent", 0, 0, c_recent
, C_AUTH
},
936 { "reconfigure", 0, 0, c_reconfigure
, C_AUTH
|C_TRUSTED
},
937 { "remove", 1, 1, c_remove
, C_AUTH
},
938 { "rescan", 0, 0, c_rescan
, C_AUTH
|C_TRUSTED
},
939 { "resolve", 1, 1, c_resolve
, C_AUTH
},
940 { "resume", 0, 0, c_resume
, C_AUTH
},
941 { "scratch", 0, 1, c_scratch
, C_AUTH
},
942 { "search", 1, 1, c_search
, C_AUTH
},
943 { "set", 3, 3, c_set
, C_AUTH
, },
944 { "set-global", 2, 2, c_set_global
, C_AUTH
},
945 { "shutdown", 0, 0, c_shutdown
, C_AUTH
|C_TRUSTED
},
946 { "stats", 0, 0, c_stats
, C_AUTH
},
947 { "tags", 0, 0, c_tags
, C_AUTH
},
948 { "unset", 2, 2, c_set
, C_AUTH
},
949 { "unset-global", 1, 1, c_set_global
, C_AUTH
},
950 { "user", 2, 2, c_user
, 0 },
951 { "version", 0, 0, c_version
, C_AUTH
},
952 { "volume", 0, 2, c_volume
, C_AUTH
}
955 static void command_error(const char *msg
, void *u
) {
958 sink_printf(ev_writer_sink(c
->w
), "500 parse error: %s\n", msg
);
961 /* process a command. Return 1 if complete, 0 if incomplete. */
962 static int command(struct conn
*c
, char *line
) {
966 D(("server command %s", line
));
967 if(!(vec
= split(line
, &nvec
, SPLIT_QUOTES
, command_error
, c
))) {
968 sink_writes(ev_writer_sink(c
->w
), "500 cannot parse command\n");
972 sink_writes(ev_writer_sink(c
->w
), "500 do what?\n");
975 if((n
= TABLE_FIND(commands
, struct command
, name
, vec
[0])) < 0)
976 sink_writes(ev_writer_sink(c
->w
), "500 unknown command\n");
978 if((commands
[n
].flags
& C_AUTH
) && !c
->who
) {
979 sink_writes(ev_writer_sink(c
->w
), "530 not authenticated\n");
982 if((commands
[n
].flags
& C_TRUSTED
) && !trusted(c
)) {
983 sink_writes(ev_writer_sink(c
->w
), "530 insufficient privilege\n");
988 if(nvec
< commands
[n
].minargs
) {
989 sink_writes(ev_writer_sink(c
->w
), "500 missing argument(s)\n");
992 if(nvec
> commands
[n
].maxargs
) {
993 sink_writes(ev_writer_sink(c
->w
), "500 too many arguments\n");
996 return commands
[n
].fn(c
, vec
, nvec
);
998 return 1; /* completed */
1001 /* redirect to the right reader callback for our current state */
1002 static int redirect_reader_callback(ev_source
*ev
,
1011 return c
->reader(ev
, reader
, fd
, ptr
, bytes
, eof
, u
);
1014 /* the main command reader */
1015 static int reader_callback(ev_source
attribute((unused
)) *ev
,
1017 int attribute((unused
)) fd
,
1026 D(("server reader_callback"));
1027 while((eol
= memchr(ptr
, '\n', bytes
))) {
1029 ev_reader_consume(reader
, eol
- (char *)ptr
);
1030 complete
= command(c
, ptr
);
1031 bytes
-= (eol
- (char *)ptr
);
1034 /* the command had better have set a new reader callback */
1036 /* there are further bytes to read, or we are at eof; arrange for the
1037 * command's reader callback to handle them */
1038 return ev_reader_incomplete(reader
);
1039 /* nothing's going on right now */
1042 /* command completed, we can go around and handle the next one */
1046 error(0, "S%x unterminated line", c
->tag
);
1048 return ev_writer_close(c
->w
);
1053 static int listen_callback(ev_source
*ev
,
1055 const struct sockaddr
attribute((unused
)) *remote
,
1056 socklen_t
attribute((unused
)) rlen
,
1058 const struct listener
*l
= u
;
1059 struct conn
*c
= xmalloc(sizeof *c
);
1060 static unsigned tags
;
1062 D(("server listen_callback fd %d (%s)", fd
, l
->name
));
1067 c
->w
= ev_writer_new(ev
, fd
, writer_error
, c
);
1068 c
->r
= ev_reader_new(ev
, fd
, redirect_reader_callback
, reader_error
, c
);
1070 c
->reader
= reader_callback
;
1072 gcry_randomize(c
->nonce
, sizeof c
->nonce
, GCRY_STRONG_RANDOM
);
1073 sink_printf(ev_writer_sink(c
->w
), "231 %s\n", hex(c
->nonce
, sizeof c
->nonce
));
1077 int server_start(ev_source
*ev
, int pf
,
1078 size_t socklen
, const struct sockaddr
*sa
,
1081 struct listener
*l
= xmalloc(sizeof *l
);
1082 static const int one
= 1;
1084 D(("server_init socket %s", name
));
1085 fd
= xsocket(pf
, SOCK_STREAM
, 0);
1086 xsetsockopt(fd
, SOL_SOCKET
, SO_REUSEADDR
, &one
, sizeof one
);
1087 if(bind(fd
, sa
, socklen
) < 0) {
1088 error(errno
, "error binding to %s", name
);
1096 if(ev_listen(ev
, fd
, listen_callback
, l
)) exit(EXIT_FAILURE
);
1100 int server_stop(ev_source
*ev
, int fd
) {
1102 return ev_listen_cancel(ev
, fd
);