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
76 # define CONFIRM_SIZE 10
79 int volume_left
, volume_right
; /* last known volume */
81 /** @brief Accept all well-formed login attempts
92 /** @brief One client connection */
94 /** @brief Read commands from here */
96 /** @brief Send responses to here */
98 /** @brief Underlying file descriptor */
100 /** @brief Unique identifier for connection used in log messages */
102 /** @brief Login name or NULL */
104 /** @brief Event loop */
106 /** @brief Nonce chosen for this connection */
107 unsigned char nonce
[NONCE_SIZE
];
108 /** @brief Current reader callback
110 * We change this depending on whether we're servicing the @b log command
112 ev_reader_callback
*reader
;
113 /** @brief Event log output sending to this connection */
114 struct eventlog_output
*lo
;
115 /** @brief Parent listener */
116 const struct listener
*l
;
117 /** @brief Login cookie or NULL */
119 /** @brief Connection rights */
123 static int reader_callback(ev_source
*ev
,
130 static const char *noyes
[] = { "no", "yes" };
132 /** @brief Called when a connection's writer fails or is shut down
134 * If the connection still has a raeder that is cancelled.
136 static int writer_error(ev_source
attribute((unused
)) *ev
,
141 D(("server writer_error S%x %d", c
->tag
, errno_value
));
142 if(errno_value
== 0) {
144 D(("S%x writer completed", c
->tag
));
146 if(errno_value
!= EPIPE
)
147 error(errno_value
, "S%x write error on socket", c
->tag
);
149 D(("cancel reader"));
150 ev_reader_cancel(c
->r
);
153 D(("done cancel reader"));
160 /** @brief Called when a conncetion's reader fails or is shut down
162 * If connection still has a writer then it is closed.
164 static int reader_error(ev_source
attribute((unused
)) *ev
,
169 D(("server reader_error S%x %d", c
->tag
, errno_value
));
170 error(errno_value
, "S%x read error on socket", c
->tag
);
172 ev_writer_close(c
->w
);
179 static int c_disable(struct conn
*c
, char **vec
, int nvec
) {
181 disable_playing(c
->who
);
182 else if(nvec
== 1 && !strcmp(vec
[0], "now"))
183 disable_playing(c
->who
);
185 sink_writes(ev_writer_sink(c
->w
), "550 invalid argument\n");
186 return 1; /* completed */
188 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
189 return 1; /* completed */
192 static int c_enable(struct conn
*c
,
193 char attribute((unused
)) **vec
,
194 int attribute((unused
)) nvec
) {
195 enable_playing(c
->who
, c
->ev
);
196 /* Enable implicitly unpauses if there is nothing playing */
197 if(paused
&& !playing
) resume_playing(c
->who
);
198 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
199 return 1; /* completed */
202 static int c_enabled(struct conn
*c
,
203 char attribute((unused
)) **vec
,
204 int attribute((unused
)) nvec
) {
205 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[playing_is_enabled()]);
206 return 1; /* completed */
209 static int c_play(struct conn
*c
, char **vec
,
210 int attribute((unused
)) nvec
) {
212 struct queue_entry
*q
;
214 if(!trackdb_exists(vec
[0])) {
215 sink_writes(ev_writer_sink(c
->w
), "550 track is not in database\n");
218 if(!(track
= trackdb_resolve(vec
[0]))) {
219 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
222 q
= queue_add(track
, c
->who
, WHERE_BEFORE_RANDOM
);
224 /* If we added the first track, and something is playing, then prepare the
225 * new track. If nothing is playing then we don't bother as it wouldn't gain
227 if(q
== qhead
.next
&& playing
)
229 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", q
->id
);
230 /* If the queue was empty but we are for some reason paused then
232 if(!playing
) resume_playing(0);
234 return 1; /* completed */
237 static int c_remove(struct conn
*c
, char **vec
,
238 int attribute((unused
)) nvec
) {
239 struct queue_entry
*q
;
241 if(!(q
= queue_find(vec
[0]))) {
242 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
245 if(!right_removable(c
->rights
, c
->who
, q
)) {
246 error(0, "%s attempted remove but lacks required rights", c
->who
);
247 sink_writes(ev_writer_sink(c
->w
),
248 "510 Not authorized to remove that track\n");
251 queue_remove(q
, c
->who
);
252 /* De-prepare the track. */
254 /* If we removed a 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 /* TODO there is a bug here: if we specify an ID but it's not the currently
273 * playing track then you will get 550 if you weren't authorized to scratch
274 * the currently playing track. */
275 if(!right_scratchable(c
->rights
, c
->who
, playing
)) {
276 error(0, "%s attempted scratch but lacks required rights", c
->who
);
277 sink_writes(ev_writer_sink(c
->w
),
278 "510 Not authorized to scratch that track\n");
281 scratch(c
->who
, nvec
== 1 ? vec
[0] : 0);
282 /* If you scratch an unpaused track then it is automatically unpaused */
284 sink_writes(ev_writer_sink(c
->w
), "250 scratched\n");
285 return 1; /* completed */
288 static int c_pause(struct conn
*c
,
289 char attribute((unused
)) **vec
,
290 int attribute((unused
)) nvec
) {
292 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
293 return 1; /* completed */
296 sink_writes(ev_writer_sink(c
->w
), "250 already paused\n");
297 return 1; /* completed */
299 if(pause_playing(c
->who
) < 0)
300 sink_writes(ev_writer_sink(c
->w
), "550 cannot pause this track\n");
302 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
306 static int c_resume(struct conn
*c
,
307 char attribute((unused
)) **vec
,
308 int attribute((unused
)) nvec
) {
310 sink_writes(ev_writer_sink(c
->w
), "250 not paused\n");
311 return 1; /* completed */
313 resume_playing(c
->who
);
314 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
318 static int c_shutdown(struct conn
*c
,
319 char attribute((unused
)) **vec
,
320 int attribute((unused
)) nvec
) {
321 info("S%x shut down by %s", c
->tag
, c
->who
);
322 sink_writes(ev_writer_sink(c
->w
), "250 shutting down\n");
323 ev_writer_flush(c
->w
);
327 static int c_reconfigure(struct conn
*c
,
328 char attribute((unused
)) **vec
,
329 int attribute((unused
)) nvec
) {
330 info("S%x reconfigure by %s", c
->tag
, c
->who
);
331 if(reconfigure(c
->ev
, 1))
332 sink_writes(ev_writer_sink(c
->w
), "550 error reading new config\n");
334 sink_writes(ev_writer_sink(c
->w
), "250 installed new config\n");
335 return 1; /* completed */
338 static int c_rescan(struct conn
*c
,
339 char attribute((unused
)) **vec
,
340 int attribute((unused
)) nvec
) {
341 info("S%x rescan by %s", c
->tag
, c
->who
);
342 trackdb_rescan(c
->ev
);
343 sink_writes(ev_writer_sink(c
->w
), "250 initiated rescan\n");
344 return 1; /* completed */
347 static int c_version(struct conn
*c
,
348 char attribute((unused
)) **vec
,
349 int attribute((unused
)) nvec
) {
350 /* VERSION had better only use the basic character set */
351 sink_printf(ev_writer_sink(c
->w
), "251 %s\n", disorder_short_version_string
);
352 return 1; /* completed */
355 static int c_playing(struct conn
*c
,
356 char attribute((unused
)) **vec
,
357 int attribute((unused
)) nvec
) {
359 queue_fix_sofar(playing
);
360 playing
->expected
= 0;
361 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", queue_marshall(playing
));
363 sink_printf(ev_writer_sink(c
->w
), "259 nothing playing\n");
364 return 1; /* completed */
367 static const char *connection_host(struct conn
*c
) {
370 struct sockaddr_in in
;
371 struct sockaddr_in6 in6
;
377 /* get connection data */
379 if(getpeername(c
->fd
, &u
.sa
, &l
) < 0) {
380 error(errno
, "S%x error calling getpeername", c
->tag
);
383 if(c
->l
->pf
!= PF_UNIX
) {
384 if((n
= getnameinfo(&u
.sa
, l
,
385 host
, sizeof host
, 0, 0, NI_NUMERICHOST
))) {
386 error(0, "S%x error calling getnameinfo: %s", c
->tag
, gai_strerror(n
));
389 return xstrdup(host
);
394 static int c_user(struct conn
*c
,
396 int attribute((unused
)) nvec
) {
398 const char *res
, *host
, *password
;
402 sink_writes(ev_writer_sink(c
->w
), "530 already authenticated\n");
405 /* get connection data */
406 if(!(host
= connection_host(c
))) {
407 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
411 k
= trackdb_getuserinfo(vec
[0]);
412 /* reject nonexistent users */
414 error(0, "S%x unknown user '%s' from %s", c
->tag
, vec
[0], host
);
415 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
418 /* reject unconfirmed users */
419 if(kvp_get(k
, "confirmation")) {
420 error(0, "S%x unconfirmed user '%s' from %s", c
->tag
, vec
[0], host
);
421 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
424 password
= kvp_get(k
, "password");
425 if(!password
) password
= "";
426 if(parse_rights(kvp_get(k
, "rights"), &rights
, 1)) {
427 error(0, "error parsing rights for %s", vec
[0]);
428 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
431 /* check whether the response is right */
432 res
= authhash(c
->nonce
, sizeof c
->nonce
, password
,
433 config
->authorization_algorithm
);
434 if(wideopen
|| (res
&& !strcmp(res
, vec
[1]))) {
437 /* currently we only bother logging remote connections */
438 if(strcmp(host
, "local"))
439 info("S%x %s connected from %s", c
->tag
, vec
[0], host
);
441 c
->rights
|= RIGHT__LOCAL
;
442 sink_writes(ev_writer_sink(c
->w
), "230 OK\n");
445 /* oops, response was wrong */
446 info("S%x authentication failure for %s from %s", c
->tag
, vec
[0], host
);
447 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
451 static int c_recent(struct conn
*c
,
452 char attribute((unused
)) **vec
,
453 int attribute((unused
)) nvec
) {
454 const struct queue_entry
*q
;
456 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
457 for(q
= phead
.next
; q
!= &phead
; q
= q
->next
)
458 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
459 sink_writes(ev_writer_sink(c
->w
), ".\n");
460 return 1; /* completed */
463 static int c_queue(struct conn
*c
,
464 char attribute((unused
)) **vec
,
465 int attribute((unused
)) nvec
) {
466 struct queue_entry
*q
;
471 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
472 if(playing_is_enabled() && !paused
) {
474 queue_fix_sofar(playing
);
475 if((l
= trackdb_get(playing
->track
, "_length"))
476 && (length
= atol(l
))) {
478 when
+= length
- playing
->sofar
+ config
->gap
;
481 /* Nothing is playing but playing is enabled, so whatever is
482 * first in the queue can be expected to start immediately. */
485 for(q
= qhead
.next
; q
!= &qhead
; q
= q
->next
) {
486 /* fill in estimated start time */
488 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
489 /* update for next track */
491 if((l
= trackdb_get(q
->track
, "_length"))
492 && (length
= atol(l
)))
493 when
+= length
+ config
->gap
;
498 sink_writes(ev_writer_sink(c
->w
), ".\n");
499 return 1; /* completed */
502 static int output_list(struct conn
*c
, char **vec
) {
504 sink_printf(ev_writer_sink(c
->w
), "%s\n", *vec
++);
505 sink_writes(ev_writer_sink(c
->w
), ".\n");
509 static int files_dirs(struct conn
*c
,
512 enum trackdb_listable what
) {
513 const char *dir
, *re
, *errstr
;
519 case 0: dir
= 0; re
= 0; break;
520 case 1: dir
= vec
[0]; re
= 0; break;
521 case 2: dir
= vec
[0]; re
= vec
[1]; break;
524 /* A bit of a bodge to make sure the args don't trample on cache keys */
525 if(dir
&& strchr(dir
, '\n')) {
526 sink_writes(ev_writer_sink(c
->w
), "550 invalid directory name\n");
529 if(re
&& strchr(re
, '\n')) {
530 sink_writes(ev_writer_sink(c
->w
), "550 invalid regexp\n");
533 /* We bother eliminating "" because the web interface is relatively
534 * likely to send it */
536 byte_xasprintf(&key
, "%d\n%s\n%s", (int)what
, dir ? dir
: "", re
);
537 fvec
= (char **)cache_get(&cache_files_type
, key
);
539 /* Got a cache hit, don't store the answer in the cache */
542 rec
= 0; /* quieten compiler */
544 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
546 if(!(rec
= pcre_compile(re
, PCRE_CASELESS
|PCRE_UTF8
,
547 &errstr
, &erroffset
, 0))) {
548 sink_printf(ev_writer_sink(c
->w
), "550 Error compiling regexp: %s\n",
552 /* It only counts as a miss if the regexp was valid. */
553 ++cache_files_misses
;
556 /* No regexp, don't bother caching the result */
562 /* No cache hit (either because a miss, or because we did not look) so do
565 fvec
= trackdb_list(dir
, 0, what
, rec
);
567 fvec
= trackdb_list(0, 0, what
, rec
);
570 /* Put the answer in the cache */
571 cache_put(&cache_files_type
, key
, fvec
);
572 sink_writes(ev_writer_sink(c
->w
), "253 Listing follow\n");
573 return output_list(c
, fvec
);
576 static int c_files(struct conn
*c
,
579 return files_dirs(c
, vec
, nvec
, trackdb_files
);
582 static int c_dirs(struct conn
*c
,
585 return files_dirs(c
, vec
, nvec
, trackdb_directories
);
588 static int c_allfiles(struct conn
*c
,
591 return files_dirs(c
, vec
, nvec
, trackdb_directories
|trackdb_files
);
594 static int c_get(struct conn
*c
,
596 int attribute((unused
)) nvec
) {
599 if(vec
[1][0] != '_' && (v
= trackdb_get(vec
[0], vec
[1])))
600 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(v
));
602 sink_writes(ev_writer_sink(c
->w
), "555 not found\n");
606 static int c_length(struct conn
*c
,
608 int attribute((unused
)) nvec
) {
609 const char *track
, *v
;
611 if(!(track
= trackdb_resolve(vec
[0]))) {
612 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
615 if((v
= trackdb_get(track
, "_length")))
616 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(v
));
618 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
622 static int c_set(struct conn
*c
,
624 int attribute((unused
)) nvec
) {
625 if(vec
[1][0] != '_' && !trackdb_set(vec
[0], vec
[1], vec
[2]))
626 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
628 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
632 static int c_prefs(struct conn
*c
,
634 int attribute((unused
)) nvec
) {
637 k
= trackdb_get_all(vec
[0]);
638 sink_writes(ev_writer_sink(c
->w
), "253 prefs follow\n");
639 for(; k
; k
= k
->next
)
640 if(k
->name
[0] != '_') /* omit internal values */
641 sink_printf(ev_writer_sink(c
->w
),
642 " %s %s\n", quoteutf8(k
->name
), quoteutf8(k
->value
));
643 sink_writes(ev_writer_sink(c
->w
), ".\n");
647 static int c_exists(struct conn
*c
,
649 int attribute((unused
)) nvec
) {
650 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[trackdb_exists(vec
[0])]);
654 static void search_parse_error(const char *msg
, void *u
) {
655 *(const char **)u
= msg
;
658 static int c_search(struct conn
*c
,
660 int attribute((unused
)) nvec
) {
661 char **terms
, **results
;
662 int nterms
, nresults
, n
;
663 const char *e
= "unknown error";
665 /* This is a bit of a bodge. Initially it's there to make the eclient
666 * interface a bit more convenient to add searching to, but it has the more
667 * compelling advantage that if everything uses it, then interpretation of
668 * user-supplied search strings will be the same everywhere. */
669 if(!(terms
= split(vec
[0], &nterms
, SPLIT_QUOTES
, search_parse_error
, &e
))) {
670 sink_printf(ev_writer_sink(c
->w
), "550 %s\n", e
);
672 results
= trackdb_search(terms
, nterms
, &nresults
);
673 sink_printf(ev_writer_sink(c
->w
), "253 %d matches\n", nresults
);
674 for(n
= 0; n
< nresults
; ++n
)
675 sink_printf(ev_writer_sink(c
->w
), "%s\n", results
[n
]);
676 sink_writes(ev_writer_sink(c
->w
), ".\n");
681 static int c_random_enable(struct conn
*c
,
682 char attribute((unused
)) **vec
,
683 int attribute((unused
)) nvec
) {
684 enable_random(c
->who
, c
->ev
);
685 /* Enable implicitly unpauses if there is nothing playing */
686 if(paused
&& !playing
) resume_playing(c
->who
);
687 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
688 return 1; /* completed */
691 static int c_random_disable(struct conn
*c
,
692 char attribute((unused
)) **vec
,
693 int attribute((unused
)) nvec
) {
694 disable_random(c
->who
);
695 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
696 return 1; /* completed */
699 static int c_random_enabled(struct conn
*c
,
700 char attribute((unused
)) **vec
,
701 int attribute((unused
)) nvec
) {
702 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[random_is_enabled()]);
703 return 1; /* completed */
706 static void got_stats(char *stats
, void *u
) {
707 struct conn
*const c
= u
;
709 sink_printf(ev_writer_sink(c
->w
), "253 stats\n%s\n.\n", stats
);
710 /* Now we can start processing commands again */
711 ev_reader_enable(c
->r
);
714 static int c_stats(struct conn
*c
,
715 char attribute((unused
)) **vec
,
716 int attribute((unused
)) nvec
) {
717 trackdb_stats_subprocess(c
->ev
, got_stats
, c
);
718 return 0; /* not yet complete */
721 static int c_volume(struct conn
*c
,
733 l
= r
= atoi(vec
[0]);
744 rights
= set ? RIGHT_VOLUME
: RIGHT_READ
;
745 if(!(c
->rights
& rights
)) {
746 error(0, "%s attempted to set volume but lacks required rights", c
->who
);
747 sink_writes(ev_writer_sink(c
->w
), "510 Prohibited\n");
750 if(mixer_control(&l
, &r
, set
))
751 sink_writes(ev_writer_sink(c
->w
), "550 error accessing mixer\n");
753 sink_printf(ev_writer_sink(c
->w
), "252 %d %d\n", l
, r
);
754 if(l
!= volume_left
|| r
!= volume_right
) {
757 snprintf(lb
, sizeof lb
, "%d", l
);
758 snprintf(rb
, sizeof rb
, "%d", r
);
759 eventlog("volume", lb
, rb
, (char *)0);
765 /** @brief Called when data arrives on a log connection
767 * We just discard all such data. The client may occasionally send data as a
770 static int logging_reader_callback(ev_source
attribute((unused
)) *ev
,
772 void attribute((unused
)) *ptr
,
774 int attribute((unused
)) eof
,
775 void attribute((unused
)) *u
) {
778 ev_reader_consume(reader
, bytes
);
780 /* Oops, that's all for now */
781 D(("logging reader eof"));
784 ev_writer_close(c
->w
);
792 static void logclient(const char *msg
, void *user
) {
793 struct conn
*c
= user
;
796 /* This connection has gone up in smoke for some reason */
797 eventlog_remove(c
->lo
);
800 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" %s\n",
801 (uintmax_t)time(0), msg
);
804 static int c_log(struct conn
*c
,
805 char attribute((unused
)) **vec
,
806 int attribute((unused
)) nvec
) {
809 sink_writes(ev_writer_sink(c
->w
), "254 OK\n");
810 /* pump out initial state */
812 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
814 playing_is_enabled() ?
"enable_play" : "disable_play");
815 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
817 random_is_enabled() ?
"enable_random" : "disable_random");
818 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
820 paused ?
"pause" : "resume");
822 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state playing\n",
825 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" volume %d %d\n",
826 (uintmax_t)now
, volume_left
, volume_right
);
827 c
->lo
= xmalloc(sizeof *c
->lo
);
828 c
->lo
->fn
= logclient
;
831 c
->reader
= logging_reader_callback
;
835 /** @brief Test whether a move is allowed
836 * @param c Connection
837 * @param qs List of IDs on queue
838 * @param nqs Number of IDs
839 * @return 0 if move is prohibited, non-0 if it is allowed
841 static int has_move_rights(struct conn
*c
, struct queue_entry
**qs
, int nqs
) {
842 for(; nqs
> 0; ++qs
, --nqs
) {
843 struct queue_entry
*const q
= *qs
;
845 if(!right_movable(c
->rights
, c
->who
, q
))
851 static int c_move(struct conn
*c
,
853 int attribute((unused
)) nvec
) {
854 struct queue_entry
*q
;
857 if(!(q
= queue_find(vec
[0]))) {
858 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
861 if(!has_move_rights(c
, &q
, 1)) {
862 error(0, "%s attempted move but lacks required rights", c
->who
);
863 sink_writes(ev_writer_sink(c
->w
),
864 "510 Not authorized to move that track\n");
867 n
= queue_move(q
, atoi(vec
[1]), c
->who
);
868 sink_printf(ev_writer_sink(c
->w
), "252 %d\n", n
);
869 /* If we've moved to the head of the queue then prepare the track. */
875 static int c_moveafter(struct conn
*c
,
877 int attribute((unused
)) nvec
) {
878 struct queue_entry
*q
, **qs
;
882 if(!(q
= queue_find(vec
[0]))) {
883 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
890 qs
= xcalloc(nvec
, sizeof *qs
);
891 for(n
= 0; n
< nvec
; ++n
)
892 if(!(qs
[n
] = queue_find(vec
[n
]))) {
893 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
896 if(!has_move_rights(c
, qs
, nvec
)) {
897 error(0, "%s attempted moveafter but lacks required rights", c
->who
);
898 sink_writes(ev_writer_sink(c
->w
),
899 "510 Not authorized to move those tracks\n");
902 queue_moveafter(q
, nvec
, qs
, c
->who
);
903 sink_printf(ev_writer_sink(c
->w
), "250 Moved tracks\n");
904 /* If we've moved to the head of the queue then prepare the track. */
910 static int c_part(struct conn
*c
,
912 int attribute((unused
)) nvec
) {
913 sink_printf(ev_writer_sink(c
->w
), "252 %s\n",
914 quoteutf8(trackdb_getpart(vec
[0], vec
[1], vec
[2])));
918 static int c_resolve(struct conn
*c
,
920 int attribute((unused
)) nvec
) {
923 if(!(track
= trackdb_resolve(vec
[0]))) {
924 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
927 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(track
));
931 static int c_tags(struct conn
*c
,
932 char attribute((unused
)) **vec
,
933 int attribute((unused
)) nvec
) {
934 char **tags
= trackdb_alltags();
936 sink_printf(ev_writer_sink(c
->w
), "253 Tag list follows\n");
938 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
939 **tags
== '.' ?
"." : "", *tags
);
942 sink_writes(ev_writer_sink(c
->w
), ".\n");
943 return 1; /* completed */
946 static int c_set_global(struct conn
*c
,
948 int attribute((unused
)) nvec
) {
949 if(vec
[0][0] == '_') {
950 sink_writes(ev_writer_sink(c
->w
), "550 cannot set internal global preferences\n");
953 trackdb_set_global(vec
[0], vec
[1], c
->who
);
954 sink_printf(ev_writer_sink(c
->w
), "250 OK\n");
958 static int c_get_global(struct conn
*c
,
960 int attribute((unused
)) nvec
) {
961 const char *s
= trackdb_get_global(vec
[0]);
964 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(s
));
966 sink_writes(ev_writer_sink(c
->w
), "555 not found\n");
970 static int c_nop(struct conn
*c
,
971 char attribute((unused
)) **vec
,
972 int attribute((unused
)) nvec
) {
973 sink_printf(ev_writer_sink(c
->w
), "250 Quack\n");
977 static int c_new(struct conn
*c
,
980 char **tracks
= trackdb_new(0, nvec
> 0 ?
atoi(vec
[0]) : INT_MAX
);
982 sink_printf(ev_writer_sink(c
->w
), "253 New track list follows\n");
984 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
985 **tracks
== '.' ?
"." : "", *tracks
);
988 sink_writes(ev_writer_sink(c
->w
), ".\n");
989 return 1; /* completed */
993 static int c_rtp_address(struct conn
*c
,
994 char attribute((unused
)) **vec
,
995 int attribute((unused
)) nvec
) {
996 if(config
->api
== BACKEND_NETWORK
) {
997 sink_printf(ev_writer_sink(c
->w
), "252 %s %s\n",
998 quoteutf8(config
->broadcast
.s
[0]),
999 quoteutf8(config
->broadcast
.s
[1]));
1001 sink_writes(ev_writer_sink(c
->w
), "550 No RTP\n");
1005 static int c_cookie(struct conn
*c
,
1007 int attribute((unused
)) nvec
) {
1012 /* Can't log in twice on the same connection */
1014 sink_writes(ev_writer_sink(c
->w
), "530 already authenticated\n");
1017 /* Get some kind of peer identifcation */
1018 if(!(host
= connection_host(c
))) {
1019 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
1022 /* Check the cookie */
1023 user
= verify_cookie(vec
[0], &rights
);
1025 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
1032 if(strcmp(host
, "local"))
1033 info("S%x %s connected with cookie from %s", c
->tag
, user
, host
);
1035 c
->rights
|= RIGHT__LOCAL
;
1036 /* Response contains username so client knows who they are acting as */
1037 sink_printf(ev_writer_sink(c
->w
), "232 %s\n", quoteutf8(user
));
1041 static int c_make_cookie(struct conn
*c
,
1042 char attribute((unused
)) **vec
,
1043 int attribute((unused
)) nvec
) {
1044 const char *cookie
= make_cookie(c
->who
);
1047 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(cookie
));
1049 sink_writes(ev_writer_sink(c
->w
), "550 Cannot create cookie\n");
1053 static int c_revoke(struct conn
*c
,
1054 char attribute((unused
)) **vec
,
1055 int attribute((unused
)) nvec
) {
1057 revoke_cookie(c
->cookie
);
1058 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1060 sink_writes(ev_writer_sink(c
->w
), "550 Did not log in with cookie\n");
1064 static int c_adduser(struct conn
*c
,
1071 if(parse_rights(vec
[2], 0, 1)) {
1072 sink_writes(ev_writer_sink(c
->w
), "550 Invalid rights list\n");
1076 rights
= config
->default_rights
;
1077 if(trackdb_adduser(vec
[0], vec
[1], rights
,
1078 0/*email*/, 0/*confirmation*/))
1079 sink_writes(ev_writer_sink(c
->w
), "550 Cannot create user\n");
1081 sink_writes(ev_writer_sink(c
->w
), "250 User created\n");
1085 static int c_deluser(struct conn
*c
,
1087 int attribute((unused
)) nvec
) {
1088 if(trackdb_deluser(vec
[0]))
1089 sink_writes(ev_writer_sink(c
->w
), "550 Cannot delete user\n");
1091 sink_writes(ev_writer_sink(c
->w
), "250 User deleted\n");
1095 static int c_edituser(struct conn
*c
,
1097 int attribute((unused
)) nvec
) {
1098 /* RIGHT_ADMIN can do anything; otherwise you can only set your own email
1099 * address and password. */
1100 if((c
->rights
& RIGHT_ADMIN
)
1101 || (!strcmp(c
->who
, vec
[0])
1102 && (!strcmp(vec
[1], "email")
1103 || !strcmp(vec
[1], "password")))) {
1104 if(trackdb_edituserinfo(vec
[0], vec
[1], vec
[2]))
1105 sink_writes(ev_writer_sink(c
->w
), "550 Failed to change setting\n");
1107 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1109 error(0, "%s attempted edituser but lacks required rights", c
->who
);
1110 sink_writes(ev_writer_sink(c
->w
), "510 Restricted to administrators\n");
1115 static int c_userinfo(struct conn
*c
,
1116 char attribute((unused
)) **vec
,
1117 int attribute((unused
)) nvec
) {
1121 /* RIGHT_ADMIN allows anything; otherwise you can only get your own email
1122 * address and righst list. */
1123 if((c
->rights
& RIGHT_ADMIN
)
1124 || (!strcmp(c
->who
, vec
[0])
1125 && (!strcmp(vec
[1], "email")
1126 || !strcmp(vec
[1], "rights")))) {
1127 if((k
= trackdb_getuserinfo(vec
[0])))
1128 if((value
= kvp_get(k
, vec
[1])))
1129 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(value
));
1131 sink_writes(ev_writer_sink(c
->w
), "555 Not set\n");
1133 sink_writes(ev_writer_sink(c
->w
), "550 No such user\n");
1135 error(0, "%s attempted userinfo but lacks required rights", c
->who
);
1136 sink_writes(ev_writer_sink(c
->w
), "510 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 /** @brief Base64 mapping table for confirmation strings
1159 * This is used with generic_to_base64() and generic_base64(). We cannot use
1160 * the MIME table as that contains '+' and '=' which get quoted when
1161 * URL-encoding. (The CGI still does the URL encoding but it is desirable to
1162 * avoid it being necessary.)
1164 static const char confirm_base64_table
[] =
1165 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789/.*";
1167 static int c_register(struct conn
*c
,
1169 int attribute((unused
)) nvec
) {
1174 /* The confirmation string is base64(username;nonce) */
1175 bufsize
= strlen(vec
[0]) + CONFIRM_SIZE
+ 2;
1176 buf
= xmalloc_noptr(bufsize
);
1177 offset
= byte_snprintf(buf
, bufsize
, "%s;", vec
[0]);
1178 gcry_randomize(buf
+ offset
, CONFIRM_SIZE
, GCRY_STRONG_RANDOM
);
1179 cs
= generic_to_base64((uint8_t *)buf
, offset
+ CONFIRM_SIZE
,
1180 confirm_base64_table
);
1181 if(trackdb_adduser(vec
[0], vec
[1], config
->default_rights
, vec
[2], cs
))
1182 sink_writes(ev_writer_sink(c
->w
), "550 Cannot create user\n");
1184 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(cs
));
1188 static int c_confirm(struct conn
*c
,
1190 int attribute((unused
)) nvec
) {
1196 /* Get some kind of peer identifcation */
1197 if(!(host
= connection_host(c
))) {
1198 sink_writes(ev_writer_sink(c
->w
), "530 Authentication failure\n");
1201 if(!(user
= generic_base64(vec
[0], &nuser
, confirm_base64_table
))
1202 || !(sep
= memchr(user
, ';', nuser
))) {
1203 sink_writes(ev_writer_sink(c
->w
), "550 Malformed confirmation string\n");
1207 if(trackdb_confirm(user
, vec
[0], &rights
))
1208 sink_writes(ev_writer_sink(c
->w
), "550 Incorrect confirmation string\n");
1213 if(strcmp(host
, "local"))
1214 info("S%x %s confirmed from %s", c
->tag
, user
, host
);
1216 c
->rights
|= RIGHT__LOCAL
;
1217 /* Response contains username so client knows who they are acting as */
1218 sink_printf(ev_writer_sink(c
->w
), "232 %s\n", quoteutf8(user
));
1223 static const struct command
{
1224 /** @brief Command name */
1227 /** @brief Minimum number of arguments */
1230 /** @brief Maximum number of arguments */
1233 /** @brief Function to process command */
1234 int (*fn
)(struct conn
*, char **, int);
1236 /** @brief Rights required to execute command
1238 * 0 means that the command can be issued without logging in. If multiple
1239 * bits are listed here any of those rights will do.
1243 { "adduser", 2, 3, c_adduser
, RIGHT_ADMIN
|RIGHT__LOCAL
},
1244 { "allfiles", 0, 2, c_allfiles
, RIGHT_READ
},
1245 { "confirm", 1, 1, c_confirm
, 0 },
1246 { "cookie", 1, 1, c_cookie
, 0 },
1247 { "deluser", 1, 1, c_deluser
, RIGHT_ADMIN
|RIGHT__LOCAL
},
1248 { "dirs", 0, 2, c_dirs
, RIGHT_READ
},
1249 { "disable", 0, 1, c_disable
, RIGHT_GLOBAL_PREFS
},
1250 { "edituser", 3, 3, c_edituser
, RIGHT_ADMIN
|RIGHT_USERINFO
},
1251 { "enable", 0, 0, c_enable
, RIGHT_GLOBAL_PREFS
},
1252 { "enabled", 0, 0, c_enabled
, RIGHT_READ
},
1253 { "exists", 1, 1, c_exists
, RIGHT_READ
},
1254 { "files", 0, 2, c_files
, RIGHT_READ
},
1255 { "get", 2, 2, c_get
, RIGHT_READ
},
1256 { "get-global", 1, 1, c_get_global
, RIGHT_READ
},
1257 { "length", 1, 1, c_length
, RIGHT_READ
},
1258 { "log", 0, 0, c_log
, RIGHT_READ
},
1259 { "make-cookie", 0, 0, c_make_cookie
, RIGHT_READ
},
1260 { "move", 2, 2, c_move
, RIGHT_MOVE__MASK
},
1261 { "moveafter", 1, INT_MAX
, c_moveafter
, RIGHT_MOVE__MASK
},
1262 { "new", 0, 1, c_new
, RIGHT_READ
},
1263 { "nop", 0, 0, c_nop
, 0 },
1264 { "part", 3, 3, c_part
, RIGHT_READ
},
1265 { "pause", 0, 0, c_pause
, RIGHT_PAUSE
},
1266 { "play", 1, 1, c_play
, RIGHT_PLAY
},
1267 { "playing", 0, 0, c_playing
, RIGHT_READ
},
1268 { "prefs", 1, 1, c_prefs
, RIGHT_READ
},
1269 { "queue", 0, 0, c_queue
, RIGHT_READ
},
1270 { "random-disable", 0, 0, c_random_disable
, RIGHT_GLOBAL_PREFS
},
1271 { "random-enable", 0, 0, c_random_enable
, RIGHT_GLOBAL_PREFS
},
1272 { "random-enabled", 0, 0, c_random_enabled
, RIGHT_READ
},
1273 { "recent", 0, 0, c_recent
, RIGHT_READ
},
1274 { "reconfigure", 0, 0, c_reconfigure
, RIGHT_ADMIN
},
1275 { "register", 3, 3, c_register
, RIGHT_REGISTER
|RIGHT__LOCAL
},
1276 { "remove", 1, 1, c_remove
, RIGHT_REMOVE__MASK
},
1277 { "rescan", 0, 0, c_rescan
, RIGHT_RESCAN
},
1278 { "resolve", 1, 1, c_resolve
, RIGHT_READ
},
1279 { "resume", 0, 0, c_resume
, RIGHT_PAUSE
},
1280 { "revoke", 0, 0, c_revoke
, RIGHT_READ
},
1281 { "rtp-address", 0, 0, c_rtp_address
, 0 },
1282 { "scratch", 0, 1, c_scratch
, RIGHT_SCRATCH__MASK
},
1283 { "search", 1, 1, c_search
, RIGHT_READ
},
1284 { "set", 3, 3, c_set
, RIGHT_PREFS
, },
1285 { "set-global", 2, 2, c_set_global
, RIGHT_GLOBAL_PREFS
},
1286 { "shutdown", 0, 0, c_shutdown
, RIGHT_ADMIN
},
1287 { "stats", 0, 0, c_stats
, RIGHT_READ
},
1288 { "tags", 0, 0, c_tags
, RIGHT_READ
},
1289 { "unset", 2, 2, c_set
, RIGHT_PREFS
},
1290 { "unset-global", 1, 1, c_set_global
, RIGHT_GLOBAL_PREFS
},
1291 { "user", 2, 2, c_user
, 0 },
1292 { "userinfo", 2, 2, c_userinfo
, RIGHT_READ
},
1293 { "users", 0, 0, c_users
, RIGHT_READ
},
1294 { "version", 0, 0, c_version
, RIGHT_READ
},
1295 { "volume", 0, 2, c_volume
, RIGHT_READ
|RIGHT_VOLUME
}
1298 static void command_error(const char *msg
, void *u
) {
1301 sink_printf(ev_writer_sink(c
->w
), "500 parse error: %s\n", msg
);
1304 /* process a command. Return 1 if complete, 0 if incomplete. */
1305 static int command(struct conn
*c
, char *line
) {
1309 D(("server command %s", line
));
1310 /* We force everything into NFC as early as possible */
1311 if(!(line
= utf8_compose_canon(line
, strlen(line
), 0))) {
1312 sink_writes(ev_writer_sink(c
->w
), "500 cannot normalize command\n");
1315 if(!(vec
= split(line
, &nvec
, SPLIT_QUOTES
, command_error
, c
))) {
1316 sink_writes(ev_writer_sink(c
->w
), "500 cannot parse command\n");
1320 sink_writes(ev_writer_sink(c
->w
), "500 do what?\n");
1323 if((n
= TABLE_FIND(commands
, struct command
, name
, vec
[0])) < 0)
1324 sink_writes(ev_writer_sink(c
->w
), "500 unknown command\n");
1326 if(commands
[n
].rights
1327 && !(c
->rights
& commands
[n
].rights
)) {
1328 error(0, "%s attempted %s but lacks required rights", c
->who ? c
->who
: "NULL",
1330 sink_writes(ev_writer_sink(c
->w
), "510 Prohibited\n");
1335 if(nvec
< commands
[n
].minargs
) {
1336 sink_writes(ev_writer_sink(c
->w
), "500 missing argument(s)\n");
1339 if(nvec
> commands
[n
].maxargs
) {
1340 sink_writes(ev_writer_sink(c
->w
), "500 too many arguments\n");
1343 return commands
[n
].fn(c
, vec
, nvec
);
1345 return 1; /* completed */
1348 /* redirect to the right reader callback for our current state */
1349 static int redirect_reader_callback(ev_source
*ev
,
1357 return c
->reader(ev
, reader
, ptr
, bytes
, eof
, u
);
1360 /* the main command reader */
1361 static int reader_callback(ev_source
attribute((unused
)) *ev
,
1371 D(("server reader_callback"));
1372 while((eol
= memchr(ptr
, '\n', bytes
))) {
1374 ev_reader_consume(reader
, eol
- (char *)ptr
);
1375 complete
= command(c
, ptr
);
1376 bytes
-= (eol
- (char *)ptr
);
1379 /* the command had better have set a new reader callback */
1381 /* there are further bytes to read, or we are at eof; arrange for the
1382 * command's reader callback to handle them */
1383 return ev_reader_incomplete(reader
);
1384 /* nothing's going on right now */
1387 /* command completed, we can go around and handle the next one */
1391 error(0, "S%x unterminated line", c
->tag
);
1392 D(("normal reader close"));
1395 D(("close associated writer"));
1396 ev_writer_close(c
->w
);
1403 static int listen_callback(ev_source
*ev
,
1405 const struct sockaddr
attribute((unused
)) *remote
,
1406 socklen_t
attribute((unused
)) rlen
,
1408 const struct listener
*l
= u
;
1409 struct conn
*c
= xmalloc(sizeof *c
);
1410 static unsigned tags
;
1412 D(("server listen_callback fd %d (%s)", fd
, l
->name
));
1417 c
->w
= ev_writer_new(ev
, fd
, writer_error
, c
,
1419 c
->r
= ev_reader_new(ev
, fd
, redirect_reader_callback
, reader_error
, c
,
1423 c
->reader
= reader_callback
;
1426 gcry_randomize(c
->nonce
, sizeof c
->nonce
, GCRY_STRONG_RANDOM
);
1427 sink_printf(ev_writer_sink(c
->w
), "231 %d %s %s\n",
1429 config
->authorization_algorithm
,
1430 hex(c
->nonce
, sizeof c
->nonce
));
1434 int server_start(ev_source
*ev
, int pf
,
1435 size_t socklen
, const struct sockaddr
*sa
,
1438 struct listener
*l
= xmalloc(sizeof *l
);
1439 static const int one
= 1;
1441 D(("server_init socket %s", name
));
1442 fd
= xsocket(pf
, SOCK_STREAM
, 0);
1443 xsetsockopt(fd
, SOL_SOCKET
, SO_REUSEADDR
, &one
, sizeof one
);
1444 if(bind(fd
, sa
, socklen
) < 0) {
1445 error(errno
, "error binding to %s", name
);
1453 if(ev_listen(ev
, fd
, listen_callback
, l
, "server listener"))
1458 int server_stop(ev_source
*ev
, int fd
) {
1460 return ev_listen_cancel(ev
, fd
);