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"
69 # define NONCE_SIZE 16
72 int volume_left
, volume_right
; /* last known volume */
74 /** @brief Accept all well-formed login attempts
85 /** @brief One client connection */
87 /** @brief Read commands from here */
89 /** @brief Send responses to here */
91 /** @brief Underlying file descriptor */
93 /** @brief Unique identifier for connection used in log messages */
95 /** @brief Login name or NULL */
97 /** @brief Event loop */
99 /** @brief Nonce chosen for this connection */
100 unsigned char nonce
[NONCE_SIZE
];
101 /** @brief Current reader callback
103 * We change this depending on whether we're servicing the @b log command
105 ev_reader_callback
*reader
;
106 /** @brief Event log output sending to this connection */
107 struct eventlog_output
*lo
;
108 /** @brief Parent listener */
109 const struct listener
*l
;
112 static int reader_callback(ev_source
*ev
,
119 static const char *noyes
[] = { "no", "yes" };
121 /** @brief Called when a connection's writer fails or is shut down
123 * If the connection still has a raeder that is cancelled.
125 static int writer_error(ev_source
attribute((unused
)) *ev
,
130 D(("server writer_error S%x %d", c
->tag
, errno_value
));
131 if(errno_value
== 0) {
133 D(("S%x writer completed", c
->tag
));
135 if(errno_value
!= EPIPE
)
136 error(errno_value
, "S%x write error on socket", c
->tag
);
138 D(("cancel reader"));
139 ev_reader_cancel(c
->r
);
142 D(("done cancel reader"));
149 /** @brief Called when a conncetion's reader fails or is shut down
151 * If connection still has a writer then it is closed.
153 static int reader_error(ev_source
attribute((unused
)) *ev
,
158 D(("server reader_error S%x %d", c
->tag
, errno_value
));
159 error(errno_value
, "S%x read error on socket", c
->tag
);
161 ev_writer_close(c
->w
);
168 /** @brief Return true if we are talking to a trusted user */
169 static int trusted(struct conn
*c
) {
172 for(n
= 0; (n
< config
->trust
.n
173 && strcmp(config
->trust
.s
[n
], c
->who
)); ++n
)
175 return n
< config
->trust
.n
;
178 static int c_disable(struct conn
*c
, char **vec
, int nvec
) {
180 disable_playing(c
->who
);
181 else if(nvec
== 1 && !strcmp(vec
[0], "now"))
182 disable_playing(c
->who
);
184 sink_writes(ev_writer_sink(c
->w
), "550 invalid argument\n");
185 return 1; /* completed */
187 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
188 return 1; /* completed */
191 static int c_enable(struct conn
*c
,
192 char attribute((unused
)) **vec
,
193 int attribute((unused
)) nvec
) {
194 enable_playing(c
->who
, c
->ev
);
195 /* Enable implicitly unpauses if there is nothing playing */
196 if(paused
&& !playing
) resume_playing(c
->who
);
197 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
198 return 1; /* completed */
201 static int c_enabled(struct conn
*c
,
202 char attribute((unused
)) **vec
,
203 int attribute((unused
)) nvec
) {
204 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[playing_is_enabled()]);
205 return 1; /* completed */
208 static int c_play(struct conn
*c
, char **vec
,
209 int attribute((unused
)) nvec
) {
211 struct queue_entry
*q
;
213 if(!trackdb_exists(vec
[0])) {
214 sink_writes(ev_writer_sink(c
->w
), "550 track is not in database\n");
217 if(!(track
= trackdb_resolve(vec
[0]))) {
218 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
221 q
= queue_add(track
, c
->who
, WHERE_BEFORE_RANDOM
);
223 /* If we added the first track, and something is playing, then prepare the
224 * new track. If nothing is playing then we don't bother as it wouldn't gain
226 if(q
== qhead
.next
&& playing
)
228 sink_writes(ev_writer_sink(c
->w
), "250 queued\n");
229 /* If the queue was empty but we are for some reason paused then
231 if(!playing
) resume_playing(0);
233 return 1; /* completed */
236 static int c_remove(struct conn
*c
, char **vec
,
237 int attribute((unused
)) nvec
) {
238 struct queue_entry
*q
;
240 if(!(q
= queue_find(vec
[0]))) {
241 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
244 if(config
->restrictions
& RESTRICT_REMOVE
) {
245 /* can only remove tracks that you submitted */
246 if(!q
->submitter
|| strcmp(q
->submitter
, c
->who
)) {
247 sink_writes(ev_writer_sink(c
->w
), "550 you didn't submit that track!\n");
251 queue_remove(q
, c
->who
);
252 /* De-prepare the track. */
254 /* If we removed the random track then add another one. */
255 if(q
->state
== playing_random
)
257 /* Prepare whatever the next head track is. */
258 if(qhead
.next
!= &qhead
)
259 prepare(c
->ev
, qhead
.next
);
261 sink_writes(ev_writer_sink(c
->w
), "250 removed\n");
262 return 1; /* completed */
265 static int c_scratch(struct conn
*c
,
269 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
270 return 1; /* completed */
272 if(config
->restrictions
& RESTRICT_SCRATCH
) {
273 /* can only scratch tracks you submitted and randomly selected ones */
274 if(playing
->submitter
&& strcmp(playing
->submitter
, c
->who
)) {
275 sink_writes(ev_writer_sink(c
->w
), "550 you didn't submit that track!\n");
279 scratch(c
->who
, nvec
== 1 ? vec
[0] : 0);
280 /* If you scratch an unpaused track then it is automatically unpaused */
282 sink_writes(ev_writer_sink(c
->w
), "250 scratched\n");
283 return 1; /* completed */
286 static int c_pause(struct conn
*c
,
287 char attribute((unused
)) **vec
,
288 int attribute((unused
)) nvec
) {
290 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
291 return 1; /* completed */
294 sink_writes(ev_writer_sink(c
->w
), "250 already paused\n");
295 return 1; /* completed */
297 if(pause_playing(c
->who
) < 0)
298 sink_writes(ev_writer_sink(c
->w
), "550 cannot pause this track\n");
300 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
304 static int c_resume(struct conn
*c
,
305 char attribute((unused
)) **vec
,
306 int attribute((unused
)) nvec
) {
308 sink_writes(ev_writer_sink(c
->w
), "250 not paused\n");
309 return 1; /* completed */
311 resume_playing(c
->who
);
312 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
316 static int c_shutdown(struct conn
*c
,
317 char attribute((unused
)) **vec
,
318 int attribute((unused
)) nvec
) {
319 info("S%x shut down by %s", c
->tag
, c
->who
);
320 sink_writes(ev_writer_sink(c
->w
), "250 shutting down\n");
321 ev_writer_flush(c
->w
);
325 static int c_reconfigure(struct conn
*c
,
326 char attribute((unused
)) **vec
,
327 int attribute((unused
)) nvec
) {
328 info("S%x reconfigure by %s", c
->tag
, c
->who
);
329 if(reconfigure(c
->ev
, 1))
330 sink_writes(ev_writer_sink(c
->w
), "550 error reading new config\n");
332 sink_writes(ev_writer_sink(c
->w
), "250 installed new config\n");
333 return 1; /* completed */
336 static int c_rescan(struct conn
*c
,
337 char attribute((unused
)) **vec
,
338 int attribute((unused
)) nvec
) {
339 info("S%x rescan by %s", c
->tag
, c
->who
);
340 trackdb_rescan(c
->ev
);
341 sink_writes(ev_writer_sink(c
->w
), "250 initiated rescan\n");
342 return 1; /* completed */
345 static int c_version(struct conn
*c
,
346 char attribute((unused
)) **vec
,
347 int attribute((unused
)) nvec
) {
348 /* VERSION had better only use the basic character set */
349 sink_printf(ev_writer_sink(c
->w
), "251 %s\n", disorder_version_string
);
350 return 1; /* completed */
353 static int c_playing(struct conn
*c
,
354 char attribute((unused
)) **vec
,
355 int attribute((unused
)) nvec
) {
357 queue_fix_sofar(playing
);
358 playing
->expected
= 0;
359 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", queue_marshall(playing
));
361 sink_printf(ev_writer_sink(c
->w
), "259 nothing playing\n");
362 return 1; /* completed */
365 static int c_become(struct conn
*c
,
367 int attribute((unused
)) nvec
) {
369 sink_writes(ev_writer_sink(c
->w
), "230 OK\n");
373 static int c_user(struct conn
*c
,
375 int attribute((unused
)) nvec
) {
380 struct sockaddr_in in
;
381 struct sockaddr_in6 in6
;
387 sink_writes(ev_writer_sink(c
->w
), "530 already authenticated\n");
390 /* get connection data */
392 if(getpeername(c
->fd
, &u
.sa
, &l
) < 0) {
393 error(errno
, "S%x error calling getpeername", c
->tag
);
394 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
397 if(c
->l
->pf
!= PF_UNIX
) {
398 if((n
= getnameinfo(&u
.sa
, l
,
399 host
, sizeof host
, 0, 0, NI_NUMERICHOST
))) {
400 error(0, "S%x error calling getnameinfo: %s", c
->tag
, gai_strerror(n
));
401 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
405 strcpy(host
, "local");
407 for(n
= 0; n
< config
->allow
.n
408 && strcmp(config
->allow
.s
[n
].s
[0], vec
[0]); ++n
)
410 /* if it's a real user check whether the response is right */
411 if(n
>= config
->allow
.n
) {
412 info("S%x unknown user '%s' from %s", c
->tag
, vec
[0], host
);
413 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
416 res
= authhash(c
->nonce
, sizeof c
->nonce
, config
->allow
.s
[n
].s
[1],
417 config
->authorization_algorithm
);
418 if(wideopen
|| (res
&& !strcmp(res
, vec
[1]))) {
420 /* currently we only bother logging remote connections */
421 if(c
->l
->pf
!= PF_UNIX
)
422 info("S%x %s connected from %s", c
->tag
, vec
[0], host
);
423 sink_writes(ev_writer_sink(c
->w
), "230 OK\n");
426 /* oops, response was wrong */
427 info("S%x authentication failure for %s from %s", c
->tag
, vec
[0], host
);
428 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
432 static int c_recent(struct conn
*c
,
433 char attribute((unused
)) **vec
,
434 int attribute((unused
)) nvec
) {
435 const struct queue_entry
*q
;
437 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
438 for(q
= phead
.next
; q
!= &phead
; q
= q
->next
)
439 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
440 sink_writes(ev_writer_sink(c
->w
), ".\n");
441 return 1; /* completed */
444 static int c_queue(struct conn
*c
,
445 char attribute((unused
)) **vec
,
446 int attribute((unused
)) nvec
) {
447 struct queue_entry
*q
;
452 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
453 if(playing_is_enabled() && !paused
) {
455 queue_fix_sofar(playing
);
456 if((l
= trackdb_get(playing
->track
, "_length"))
457 && (length
= atol(l
))) {
459 when
+= length
- playing
->sofar
+ config
->gap
;
462 /* Nothing is playing but playing is enabled, so whatever is
463 * first in the queue can be expected to start immediately. */
466 for(q
= qhead
.next
; q
!= &qhead
; q
= q
->next
) {
467 /* fill in estimated start time */
469 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
470 /* update for next track */
472 if((l
= trackdb_get(q
->track
, "_length"))
473 && (length
= atol(l
)))
474 when
+= length
+ config
->gap
;
479 sink_writes(ev_writer_sink(c
->w
), ".\n");
480 return 1; /* completed */
483 static int output_list(struct conn
*c
, char **vec
) {
485 sink_printf(ev_writer_sink(c
->w
), "%s\n", *vec
++);
486 sink_writes(ev_writer_sink(c
->w
), ".\n");
490 static int files_dirs(struct conn
*c
,
493 enum trackdb_listable what
) {
494 const char *dir
, *re
, *errstr
;
500 case 0: dir
= 0; re
= 0; break;
501 case 1: dir
= vec
[0]; re
= 0; break;
502 case 2: dir
= vec
[0]; re
= vec
[1]; break;
505 /* A bit of a bodge to make sure the args don't trample on cache keys */
506 if(dir
&& strchr(dir
, '\n')) {
507 sink_writes(ev_writer_sink(c
->w
), "550 invalid directory name\n");
510 if(re
&& strchr(re
, '\n')) {
511 sink_writes(ev_writer_sink(c
->w
), "550 invalid regexp\n");
514 /* We bother eliminating "" because the web interface is relatively
515 * likely to send it */
517 byte_xasprintf(&key
, "%d\n%s\n%s", (int)what
, dir ? dir
: "", re
);
518 fvec
= (char **)cache_get(&cache_files_type
, key
);
520 /* Got a cache hit, don't store the answer in the cache */
523 rec
= 0; /* quieten compiler */
525 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
527 if(!(rec
= pcre_compile(re
, PCRE_CASELESS
|PCRE_UTF8
,
528 &errstr
, &erroffset
, 0))) {
529 sink_printf(ev_writer_sink(c
->w
), "550 Error compiling regexp: %s\n",
533 /* It only counts as a miss if the regexp was valid. */
534 ++cache_files_misses
;
537 /* No regexp, don't bother caching the result */
543 /* No cache hit (either because a miss, or because we did not look) so do
546 fvec
= trackdb_list(dir
, 0, what
, rec
);
548 fvec
= trackdb_list(0, 0, what
, rec
);
551 /* Put the answer in the cache */
552 cache_put(&cache_files_type
, key
, fvec
);
553 sink_writes(ev_writer_sink(c
->w
), "253 Listing follow\n");
554 return output_list(c
, fvec
);
557 static int c_files(struct conn
*c
,
560 return files_dirs(c
, vec
, nvec
, trackdb_files
);
563 static int c_dirs(struct conn
*c
,
566 return files_dirs(c
, vec
, nvec
, trackdb_directories
);
569 static int c_allfiles(struct conn
*c
,
572 return files_dirs(c
, vec
, nvec
, trackdb_directories
|trackdb_files
);
575 static int c_get(struct conn
*c
,
577 int attribute((unused
)) nvec
) {
580 if(vec
[1][0] != '_' && (v
= trackdb_get(vec
[0], vec
[1])))
581 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", v
);
583 sink_writes(ev_writer_sink(c
->w
), "555 not found\n");
587 static int c_length(struct conn
*c
,
589 int attribute((unused
)) nvec
) {
590 const char *track
, *v
;
592 if(!(track
= trackdb_resolve(vec
[0]))) {
593 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
596 if((v
= trackdb_get(track
, "_length")))
597 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", v
);
599 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
603 static int c_set(struct conn
*c
,
605 int attribute((unused
)) nvec
) {
606 if(vec
[1][0] != '_' && !trackdb_set(vec
[0], vec
[1], vec
[2]))
607 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
609 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
613 static int c_prefs(struct conn
*c
,
615 int attribute((unused
)) nvec
) {
618 k
= trackdb_get_all(vec
[0]);
619 sink_writes(ev_writer_sink(c
->w
), "253 prefs follow\n");
620 for(; k
; k
= k
->next
)
621 if(k
->name
[0] != '_') /* omit internal values */
622 sink_printf(ev_writer_sink(c
->w
),
623 " %s %s\n", quoteutf8(k
->name
), quoteutf8(k
->value
));
624 sink_writes(ev_writer_sink(c
->w
), ".\n");
628 static int c_exists(struct conn
*c
,
630 int attribute((unused
)) nvec
) {
631 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[trackdb_exists(vec
[0])]);
635 static void search_parse_error(const char *msg
, void *u
) {
636 *(const char **)u
= msg
;
639 static int c_search(struct conn
*c
,
641 int attribute((unused
)) nvec
) {
642 char **terms
, **results
;
643 int nterms
, nresults
, n
;
644 const char *e
= "unknown error";
646 /* This is a bit of a bodge. Initially it's there to make the eclient
647 * interface a bit more convenient to add searching to, but it has the more
648 * compelling advantage that if everything uses it, then interpretation of
649 * user-supplied search strings will be the same everywhere. */
650 if(!(terms
= split(vec
[0], &nterms
, SPLIT_QUOTES
, search_parse_error
, &e
))) {
651 sink_printf(ev_writer_sink(c
->w
), "550 %s\n", e
);
653 results
= trackdb_search(terms
, nterms
, &nresults
);
654 sink_printf(ev_writer_sink(c
->w
), "253 %d matches\n", nresults
);
655 for(n
= 0; n
< nresults
; ++n
)
656 sink_printf(ev_writer_sink(c
->w
), "%s\n", results
[n
]);
657 sink_writes(ev_writer_sink(c
->w
), ".\n");
662 static int c_random_enable(struct conn
*c
,
663 char attribute((unused
)) **vec
,
664 int attribute((unused
)) nvec
) {
665 enable_random(c
->who
, c
->ev
);
666 /* Enable implicitly unpauses if there is nothing playing */
667 if(paused
&& !playing
) resume_playing(c
->who
);
668 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
669 return 1; /* completed */
672 static int c_random_disable(struct conn
*c
,
673 char attribute((unused
)) **vec
,
674 int attribute((unused
)) nvec
) {
675 disable_random(c
->who
);
676 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
677 return 1; /* completed */
680 static int c_random_enabled(struct conn
*c
,
681 char attribute((unused
)) **vec
,
682 int attribute((unused
)) nvec
) {
683 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[random_is_enabled()]);
684 return 1; /* completed */
687 static void got_stats(char *stats
, void *u
) {
688 struct conn
*const c
= u
;
690 sink_printf(ev_writer_sink(c
->w
), "253 stats\n%s\n.\n", stats
);
691 /* Now we can start processing commands again */
692 ev_reader_enable(c
->r
);
695 static int c_stats(struct conn
*c
,
696 char attribute((unused
)) **vec
,
697 int attribute((unused
)) nvec
) {
698 trackdb_stats_subprocess(c
->ev
, got_stats
, c
);
699 return 0; /* not yet complete */
702 static int c_volume(struct conn
*c
,
713 l
= r
= atoi(vec
[0]);
724 if(mixer_control(&l
, &r
, set
))
725 sink_writes(ev_writer_sink(c
->w
), "550 error accessing mixer\n");
727 sink_printf(ev_writer_sink(c
->w
), "252 %d %d\n", l
, r
);
728 if(l
!= volume_left
|| r
!= volume_right
) {
731 snprintf(lb
, sizeof lb
, "%d", l
);
732 snprintf(rb
, sizeof rb
, "%d", r
);
733 eventlog("volume", lb
, rb
, (char *)0);
739 /** @brief Called when data arrives on a log connection
741 * We just discard all such data. The client may occasionally send data as a
744 static int logging_reader_callback(ev_source
attribute((unused
)) *ev
,
746 void attribute((unused
)) *ptr
,
748 int attribute((unused
)) eof
,
749 void attribute((unused
)) *u
) {
752 ev_reader_consume(reader
, bytes
);
754 /* Oops, that's all for now */
755 D(("logging reader eof"));
758 ev_writer_close(c
->w
);
766 static void logclient(const char *msg
, void *user
) {
767 struct conn
*c
= user
;
770 /* This connection has gone up in smoke for some reason */
771 eventlog_remove(c
->lo
);
774 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" %s\n",
775 (uintmax_t)time(0), msg
);
778 static int c_log(struct conn
*c
,
779 char attribute((unused
)) **vec
,
780 int attribute((unused
)) nvec
) {
783 sink_writes(ev_writer_sink(c
->w
), "254 OK\n");
784 /* pump out initial state */
786 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
788 playing_is_enabled() ?
"enable_play" : "disable_play");
789 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
791 random_is_enabled() ?
"enable_random" : "disable_random");
792 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
794 paused ?
"pause" : "resume");
796 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state playing\n",
799 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" volume %d %d\n",
800 (uintmax_t)now
, volume_left
, volume_right
);
801 c
->lo
= xmalloc(sizeof *c
->lo
);
802 c
->lo
->fn
= logclient
;
805 c
->reader
= logging_reader_callback
;
809 static int c_move(struct conn
*c
,
811 int attribute((unused
)) nvec
) {
812 struct queue_entry
*q
;
815 if(config
->restrictions
& RESTRICT_MOVE
) {
817 sink_writes(ev_writer_sink(c
->w
),
818 "550 only trusted users can move tracks\n");
822 if(!(q
= queue_find(vec
[0]))) {
823 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
826 n
= queue_move(q
, atoi(vec
[1]), c
->who
);
827 sink_printf(ev_writer_sink(c
->w
), "252 %d\n", n
);
828 /* If we've moved to the head of the queue then prepare the track. */
834 static int c_moveafter(struct conn
*c
,
836 int attribute((unused
)) nvec
) {
837 struct queue_entry
*q
, **qs
;
840 if(config
->restrictions
& RESTRICT_MOVE
) {
842 sink_writes(ev_writer_sink(c
->w
),
843 "550 only trusted users can move tracks\n");
848 if(!(q
= queue_find(vec
[0]))) {
849 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
856 qs
= xcalloc(nvec
, sizeof *qs
);
857 for(n
= 0; n
< nvec
; ++n
)
858 if(!(qs
[n
] = queue_find(vec
[n
]))) {
859 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
862 queue_moveafter(q
, nvec
, qs
, c
->who
);
863 sink_printf(ev_writer_sink(c
->w
), "250 Moved tracks\n");
864 /* If we've moved to the head of the queue then prepare the track. */
870 static int c_part(struct conn
*c
,
872 int attribute((unused
)) nvec
) {
873 sink_printf(ev_writer_sink(c
->w
), "252 %s\n",
874 trackdb_getpart(vec
[0], vec
[1], vec
[2]));
878 static int c_resolve(struct conn
*c
,
880 int attribute((unused
)) nvec
) {
883 if(!(track
= trackdb_resolve(vec
[0]))) {
884 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
887 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", track
);
891 static int c_tags(struct conn
*c
,
892 char attribute((unused
)) **vec
,
893 int attribute((unused
)) nvec
) {
894 char **tags
= trackdb_alltags();
896 sink_printf(ev_writer_sink(c
->w
), "253 Tag list follows\n");
898 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
899 **tags
== '.' ?
"." : "", *tags
);
902 sink_writes(ev_writer_sink(c
->w
), ".\n");
903 return 1; /* completed */
907 static int c_set_global(struct conn
*c
,
909 int attribute((unused
)) nvec
) {
910 if(vec
[0][0] == '_') {
911 sink_writes(ev_writer_sink(c
->w
), "550 cannot set internal global preferences\n");
914 trackdb_set_global(vec
[0], vec
[1], c
->who
);
915 sink_printf(ev_writer_sink(c
->w
), "250 OK\n");
919 static int c_get_global(struct conn
*c
,
921 int attribute((unused
)) nvec
) {
922 const char *s
= trackdb_get_global(vec
[0]);
925 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", s
);
927 sink_writes(ev_writer_sink(c
->w
), "555 not found\n");
931 static int c_nop(struct conn
*c
,
932 char attribute((unused
)) **vec
,
933 int attribute((unused
)) nvec
) {
934 sink_printf(ev_writer_sink(c
->w
), "250 Quack\n");
938 static int c_new(struct conn
*c
,
941 char **tracks
= trackdb_new(0, nvec
> 0 ?
atoi(vec
[0]) : INT_MAX
);
943 sink_printf(ev_writer_sink(c
->w
), "253 New track list follows\n");
945 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
946 **tracks
== '.' ?
"." : "", *tracks
);
949 sink_writes(ev_writer_sink(c
->w
), ".\n");
950 return 1; /* completed */
954 static int c_rtp_address(struct conn
*c
,
955 char attribute((unused
)) **vec
,
956 int attribute((unused
)) nvec
) {
957 if(config
->speaker_backend
== BACKEND_NETWORK
) {
958 sink_printf(ev_writer_sink(c
->w
), "252 %s %s\n",
959 quoteutf8(config
->broadcast
.s
[0]),
960 quoteutf8(config
->broadcast
.s
[1]));
962 sink_writes(ev_writer_sink(c
->w
), "550 No RTP\n");
966 #define C_AUTH 0001 /* must be authenticated */
967 #define C_TRUSTED 0002 /* must be trusted user */
969 static const struct command
{
971 int minargs
, maxargs
;
972 int (*fn
)(struct conn
*, char **, int);
975 { "allfiles", 0, 2, c_allfiles
, C_AUTH
},
976 { "become", 1, 1, c_become
, C_AUTH
|C_TRUSTED
},
977 { "dirs", 0, 2, c_dirs
, C_AUTH
},
978 { "disable", 0, 1, c_disable
, C_AUTH
},
979 { "enable", 0, 0, c_enable
, C_AUTH
},
980 { "enabled", 0, 0, c_enabled
, C_AUTH
},
981 { "exists", 1, 1, c_exists
, C_AUTH
},
982 { "files", 0, 2, c_files
, C_AUTH
},
983 { "get", 2, 2, c_get
, C_AUTH
},
984 { "get-global", 1, 1, c_get_global
, C_AUTH
},
985 { "length", 1, 1, c_length
, C_AUTH
},
986 { "log", 0, 0, c_log
, C_AUTH
},
987 { "move", 2, 2, c_move
, C_AUTH
},
988 { "moveafter", 1, INT_MAX
, c_moveafter
, C_AUTH
},
989 { "new", 0, 1, c_new
, C_AUTH
},
990 { "nop", 0, 0, c_nop
, C_AUTH
},
991 { "part", 3, 3, c_part
, C_AUTH
},
992 { "pause", 0, 0, c_pause
, C_AUTH
},
993 { "play", 1, 1, c_play
, C_AUTH
},
994 { "playing", 0, 0, c_playing
, C_AUTH
},
995 { "prefs", 1, 1, c_prefs
, C_AUTH
},
996 { "queue", 0, 0, c_queue
, C_AUTH
},
997 { "random-disable", 0, 0, c_random_disable
, C_AUTH
},
998 { "random-enable", 0, 0, c_random_enable
, C_AUTH
},
999 { "random-enabled", 0, 0, c_random_enabled
, C_AUTH
},
1000 { "recent", 0, 0, c_recent
, C_AUTH
},
1001 { "reconfigure", 0, 0, c_reconfigure
, C_AUTH
|C_TRUSTED
},
1002 { "remove", 1, 1, c_remove
, C_AUTH
},
1003 { "rescan", 0, 0, c_rescan
, C_AUTH
|C_TRUSTED
},
1004 { "resolve", 1, 1, c_resolve
, C_AUTH
},
1005 { "resume", 0, 0, c_resume
, C_AUTH
},
1006 { "rtp-address", 0, 0, c_rtp_address
, C_AUTH
},
1007 { "scratch", 0, 1, c_scratch
, C_AUTH
},
1008 { "search", 1, 1, c_search
, C_AUTH
},
1009 { "set", 3, 3, c_set
, C_AUTH
, },
1010 { "set-global", 2, 2, c_set_global
, C_AUTH
},
1011 { "shutdown", 0, 0, c_shutdown
, C_AUTH
|C_TRUSTED
},
1012 { "stats", 0, 0, c_stats
, C_AUTH
},
1013 { "tags", 0, 0, c_tags
, C_AUTH
},
1014 { "unset", 2, 2, c_set
, C_AUTH
},
1015 { "unset-global", 1, 1, c_set_global
, C_AUTH
},
1016 { "user", 2, 2, c_user
, 0 },
1017 { "version", 0, 0, c_version
, C_AUTH
},
1018 { "volume", 0, 2, c_volume
, C_AUTH
}
1021 static void command_error(const char *msg
, void *u
) {
1024 sink_printf(ev_writer_sink(c
->w
), "500 parse error: %s\n", msg
);
1027 /* process a command. Return 1 if complete, 0 if incomplete. */
1028 static int command(struct conn
*c
, char *line
) {
1032 D(("server command %s", line
));
1033 /* We force everything into NFC as early as possible */
1034 if(!(line
= utf8_compose_canon(line
, strlen(line
), 0))) {
1035 sink_writes(ev_writer_sink(c
->w
), "500 cannot normalize command\n");
1038 if(!(vec
= split(line
, &nvec
, SPLIT_QUOTES
, command_error
, c
))) {
1039 sink_writes(ev_writer_sink(c
->w
), "500 cannot parse command\n");
1043 sink_writes(ev_writer_sink(c
->w
), "500 do what?\n");
1046 if((n
= TABLE_FIND(commands
, struct command
, name
, vec
[0])) < 0)
1047 sink_writes(ev_writer_sink(c
->w
), "500 unknown command\n");
1049 if((commands
[n
].flags
& C_AUTH
) && !c
->who
) {
1050 sink_writes(ev_writer_sink(c
->w
), "530 not authenticated\n");
1053 if((commands
[n
].flags
& C_TRUSTED
) && !trusted(c
)) {
1054 sink_writes(ev_writer_sink(c
->w
), "530 insufficient privilege\n");
1059 if(nvec
< commands
[n
].minargs
) {
1060 sink_writes(ev_writer_sink(c
->w
), "500 missing argument(s)\n");
1063 if(nvec
> commands
[n
].maxargs
) {
1064 sink_writes(ev_writer_sink(c
->w
), "500 too many arguments\n");
1067 return commands
[n
].fn(c
, vec
, nvec
);
1069 return 1; /* completed */
1072 /* redirect to the right reader callback for our current state */
1073 static int redirect_reader_callback(ev_source
*ev
,
1081 return c
->reader(ev
, reader
, ptr
, bytes
, eof
, u
);
1084 /* the main command reader */
1085 static int reader_callback(ev_source
attribute((unused
)) *ev
,
1095 D(("server reader_callback"));
1096 while((eol
= memchr(ptr
, '\n', bytes
))) {
1098 ev_reader_consume(reader
, eol
- (char *)ptr
);
1099 complete
= command(c
, ptr
);
1100 bytes
-= (eol
- (char *)ptr
);
1103 /* the command had better have set a new reader callback */
1105 /* there are further bytes to read, or we are at eof; arrange for the
1106 * command's reader callback to handle them */
1107 return ev_reader_incomplete(reader
);
1108 /* nothing's going on right now */
1111 /* command completed, we can go around and handle the next one */
1115 error(0, "S%x unterminated line", c
->tag
);
1116 D(("normal reader close"));
1119 D(("close associated writer"));
1120 ev_writer_close(c
->w
);
1127 static int listen_callback(ev_source
*ev
,
1129 const struct sockaddr
attribute((unused
)) *remote
,
1130 socklen_t
attribute((unused
)) rlen
,
1132 const struct listener
*l
= u
;
1133 struct conn
*c
= xmalloc(sizeof *c
);
1134 static unsigned tags
;
1136 D(("server listen_callback fd %d (%s)", fd
, l
->name
));
1141 c
->w
= ev_writer_new(ev
, fd
, writer_error
, c
,
1143 c
->r
= ev_reader_new(ev
, fd
, redirect_reader_callback
, reader_error
, c
,
1147 c
->reader
= reader_callback
;
1149 gcry_randomize(c
->nonce
, sizeof c
->nonce
, GCRY_STRONG_RANDOM
);
1150 if(!strcmp(config
->authorization_algorithm
, "sha1")
1151 || !strcmp(config
->authorization_algorithm
, "SHA1")) {
1152 sink_printf(ev_writer_sink(c
->w
), "231 %s\n",
1153 hex(c
->nonce
, sizeof c
->nonce
));
1155 sink_printf(ev_writer_sink(c
->w
), "231 %s %s\n",
1156 config
->authorization_algorithm
,
1157 hex(c
->nonce
, sizeof c
->nonce
));
1162 int server_start(ev_source
*ev
, int pf
,
1163 size_t socklen
, const struct sockaddr
*sa
,
1166 struct listener
*l
= xmalloc(sizeof *l
);
1167 static const int one
= 1;
1169 D(("server_init socket %s", name
));
1170 fd
= xsocket(pf
, SOCK_STREAM
, 0);
1171 xsetsockopt(fd
, SOL_SOCKET
, SO_REUSEADDR
, &one
, sizeof one
);
1172 if(bind(fd
, sa
, socklen
) < 0) {
1173 error(errno
, "error binding to %s", name
);
1181 if(ev_listen(ev
, fd
, listen_callback
, l
, "server listener"))
1186 int server_stop(ev_source
*ev
, int fd
) {
1188 return ev_listen_cancel(ev
, fd
);