2 * This file is part of DisOrder.
3 * Copyright (C) 2004-2008 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 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU 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, see <http://www.gnu.org/licenses/>.
19 #include "disorder-server.h"
22 # define NONCE_SIZE 16
26 # define CONFIRM_SIZE 10
29 int volume_left
, volume_right
; /* last known volume */
31 /** @brief Accept all well-formed login attempts
44 /** @brief Signature for line reader callback
47 * @return 0 if incomplete, 1 if complete
49 * @p line is 0-terminated and excludes the newline. It points into the
50 * input buffer so will become invalid shortly.
52 typedef int line_reader_type(struct conn
*c
,
55 /** @brief Signature for with-body command callbacks
57 * @param body List of body lines
58 * @param nbody Number of body lines
59 * @param u As passed to fetch_body()
60 * @return 0 to suspend input, 1 if complete
62 * The body strings are allocated (so survive indefinitely) and don't include
65 typedef int body_callback_type(struct conn
*c
,
70 /** @brief One client connection */
72 /** @brief Read commands from here */
74 /** @brief Send responses to here */
76 /** @brief Underlying file descriptor */
78 /** @brief Unique identifier for connection used in log messages */
80 /** @brief Login name or NULL */
82 /** @brief Event loop */
84 /** @brief Nonce chosen for this connection */
85 unsigned char nonce
[NONCE_SIZE
];
86 /** @brief Current reader callback
88 * We change this depending on whether we're servicing the @b log command
90 ev_reader_callback
*reader
;
91 /** @brief Event log output sending to this connection */
92 struct eventlog_output
*lo
;
93 /** @brief Parent listener */
94 const struct listener
*l
;
95 /** @brief Login cookie or NULL */
97 /** @brief Connection rights */
99 /** @brief Next connection */
101 /** @brief True if pending rescan had 'wait' set */
103 /** @brief Playlist that this connection locks */
104 const char *locked_playlist
;
105 /** @brief When that playlist was locked */
107 /** @brief Line reader function */
108 line_reader_type
*line_reader
;
109 /** @brief Called when command body has been read */
110 body_callback_type
*body_callback
;
111 /** @brief Passed to @c body_callback */
113 /** @brief Accumulating body */
114 struct vector body
[1];
117 /** @brief Linked list of connections */
118 static struct conn
*connections
;
120 static int reader_callback(ev_source
*ev
,
126 static int c_playlist_set_body(struct conn
*c
,
130 static int fetch_body(struct conn
*c
,
131 body_callback_type body_callback
,
133 static int body_line(struct conn
*c
, char *line
);
134 static int command(struct conn
*c
, char *line
);
136 static const char *noyes
[] = { "no", "yes" };
138 /** @brief Remove a connection from the connection list */
139 static void remove_connection(struct conn
*c
) {
142 for(cc
= &connections
; *cc
&& *cc
!= c
; cc
= &(*cc
)->next
)
148 /** @brief Called when a connection's writer fails or is shut down
150 * If the connection still has a raeder that is cancelled.
152 static int writer_error(ev_source
attribute((unused
)) *ev
,
157 D(("server writer_error S%x %d", c
->tag
, errno_value
));
158 if(errno_value
== 0) {
160 D(("S%x writer completed", c
->tag
));
162 if(errno_value
!= EPIPE
)
163 error(errno_value
, "S%x write error on socket", c
->tag
);
165 D(("cancel reader"));
166 ev_reader_cancel(c
->r
);
169 D(("done cancel reader"));
173 remove_connection(c
);
177 /** @brief Called when a conncetion's reader fails or is shut down
179 * If connection still has a writer then it is closed.
181 static int reader_error(ev_source
attribute((unused
)) *ev
,
186 D(("server reader_error S%x %d", c
->tag
, errno_value
));
187 error(errno_value
, "S%x read error on socket", c
->tag
);
189 ev_writer_close(c
->w
);
193 remove_connection(c
);
197 static int c_disable(struct conn
*c
, char **vec
, int nvec
) {
199 disable_playing(c
->who
);
200 else if(nvec
== 1 && !strcmp(vec
[0], "now"))
201 disable_playing(c
->who
);
203 sink_writes(ev_writer_sink(c
->w
), "550 invalid argument\n");
204 return 1; /* completed */
206 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
207 return 1; /* completed */
210 static int c_enable(struct conn
*c
,
211 char attribute((unused
)) **vec
,
212 int attribute((unused
)) nvec
) {
213 enable_playing(c
->who
, c
->ev
);
214 /* Enable implicitly unpauses if there is nothing playing */
215 if(paused
&& !playing
) resume_playing(c
->who
);
216 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
217 return 1; /* completed */
220 static int c_enabled(struct conn
*c
,
221 char attribute((unused
)) **vec
,
222 int attribute((unused
)) nvec
) {
223 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[playing_is_enabled()]);
224 return 1; /* completed */
227 static int c_play(struct conn
*c
, char **vec
,
228 int attribute((unused
)) nvec
) {
230 struct queue_entry
*q
;
232 if(!trackdb_exists(vec
[0])) {
233 sink_writes(ev_writer_sink(c
->w
), "550 track is not in database\n");
236 if(!(track
= trackdb_resolve(vec
[0]))) {
237 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
240 q
= queue_add(track
, c
->who
, WHERE_BEFORE_RANDOM
, origin_picked
);
242 /* If we added the first track, and something is playing, then prepare the
243 * new track. If nothing is playing then we don't bother as it wouldn't gain
245 if(q
== qhead
.next
&& playing
)
247 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", q
->id
);
248 /* If the queue was empty but we are for some reason paused then
250 if(!playing
) resume_playing(0);
252 return 1; /* completed */
255 static int c_remove(struct conn
*c
, char **vec
,
256 int attribute((unused
)) nvec
) {
257 struct queue_entry
*q
;
259 if(!(q
= queue_find(vec
[0]))) {
260 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
263 if(!right_removable(c
->rights
, c
->who
, q
)) {
264 error(0, "%s attempted remove but lacks required rights", c
->who
);
265 sink_writes(ev_writer_sink(c
->w
),
266 "510 Not authorized to remove that track\n");
269 queue_remove(q
, c
->who
);
270 /* De-prepare the track. */
272 /* See about adding a new random track */
273 add_random_track(c
->ev
);
274 /* Prepare whatever the next head track is. */
275 if(qhead
.next
!= &qhead
)
276 prepare(c
->ev
, qhead
.next
);
278 sink_writes(ev_writer_sink(c
->w
), "250 removed\n");
279 return 1; /* completed */
282 static int c_scratch(struct conn
*c
,
286 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
287 return 1; /* completed */
289 /* TODO there is a bug here: if we specify an ID but it's not the currently
290 * playing track then you will get 550 if you weren't authorized to scratch
291 * the currently playing track. */
292 if(!right_scratchable(c
->rights
, c
->who
, playing
)) {
293 error(0, "%s attempted scratch but lacks required rights", c
->who
);
294 sink_writes(ev_writer_sink(c
->w
),
295 "510 Not authorized to scratch that track\n");
298 scratch(c
->who
, nvec
== 1 ? vec
[0] : 0);
299 /* If you scratch an unpaused track then it is automatically unpaused */
301 sink_writes(ev_writer_sink(c
->w
), "250 scratched\n");
302 return 1; /* completed */
305 static int c_pause(struct conn
*c
,
306 char attribute((unused
)) **vec
,
307 int attribute((unused
)) nvec
) {
309 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
310 return 1; /* completed */
313 sink_writes(ev_writer_sink(c
->w
), "250 already paused\n");
314 return 1; /* completed */
316 if(pause_playing(c
->who
) < 0)
317 sink_writes(ev_writer_sink(c
->w
), "550 cannot pause this track\n");
319 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
323 static int c_resume(struct conn
*c
,
324 char attribute((unused
)) **vec
,
325 int attribute((unused
)) nvec
) {
327 sink_writes(ev_writer_sink(c
->w
), "250 not paused\n");
328 return 1; /* completed */
330 resume_playing(c
->who
);
331 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
335 static int c_shutdown(struct conn
*c
,
336 char attribute((unused
)) **vec
,
337 int attribute((unused
)) nvec
) {
338 info("S%x shut down by %s", c
->tag
, c
->who
);
339 sink_writes(ev_writer_sink(c
->w
), "250 shutting down\n");
340 ev_writer_flush(c
->w
);
344 static int c_reconfigure(struct conn
*c
,
345 char attribute((unused
)) **vec
,
346 int attribute((unused
)) nvec
) {
347 info("S%x reconfigure by %s", c
->tag
, c
->who
);
348 if(reconfigure(c
->ev
, 1))
349 sink_writes(ev_writer_sink(c
->w
), "550 error reading new config\n");
351 sink_writes(ev_writer_sink(c
->w
), "250 installed new config\n");
352 return 1; /* completed */
355 static void finished_rescan(void *ru
) {
356 struct conn
*const c
= ru
;
358 sink_writes(ev_writer_sink(c
->w
), "250 rescan completed\n");
359 /* Turn this connection back on */
360 ev_reader_enable(c
->r
);
363 static void start_fresh_rescan(void *ru
) {
364 struct conn
*const c
= ru
;
366 if(trackdb_rescan_underway()) {
367 /* Some other waiter beat us to it. However in this case we're happy to
368 * piggyback; the requirement is that a new rescan be started, not that it
369 * was _our_ rescan. */
371 /* We block until the rescan completes */
372 trackdb_add_rescanned(finished_rescan
, c
);
374 /* We report that the new rescan has started */
375 sink_writes(ev_writer_sink(c
->w
), "250 rescan initiated\n");
376 /* Turn this connection back on */
377 ev_reader_enable(c
->r
);
380 /* We are the first connection to get a callback so we must start a
383 /* We want to block until the new rescan completes */
384 trackdb_rescan(c
->ev
, 1/*check*/, finished_rescan
, c
);
386 /* We can report back immediately */
387 trackdb_rescan(c
->ev
, 1/*check*/, 0, 0);
388 sink_writes(ev_writer_sink(c
->w
), "250 rescan initiated\n");
389 /* Turn this connection back on */
390 ev_reader_enable(c
->r
);
395 static int c_rescan(struct conn
*c
,
398 int flag_wait
= 0, flag_fresh
= 0, n
;
401 for(n
= 0; n
< nvec
; ++n
) {
402 if(!strcmp(vec
[n
], "wait"))
403 flag_wait
= 1; /* wait for rescan to complete */
405 /* Currently disabled because untested (and hard to test). */
406 else if(!strcmp(vec
[n
], "fresh"))
407 flag_fresh
= 1; /* don't piggyback underway rescan */
410 sink_writes(ev_writer_sink(c
->w
), "550 unknown flag\n");
411 return 1; /* completed */
414 /* Report what was requested */
415 info("S%x rescan by %s (%s %s)", c
->tag
, c
->who
,
416 flag_wait ?
"wait" : "",
417 flag_fresh ?
"fresh" : "");
418 if(trackdb_rescan_underway()) {
420 /* We want a fresh rescan but there is already one underway. Arrange a
421 * callback when it completes and then set off a new one. */
422 c
->rescan_wait
= flag_wait
;
423 trackdb_add_rescanned(start_fresh_rescan
, c
);
427 sink_writes(ev_writer_sink(c
->w
), "250 rescan queued\n");
431 /* There's a rescan underway, and it's acceptable to piggyback on it */
433 /* We want to block until completion. */
434 trackdb_add_rescanned(finished_rescan
, c
);
437 /* We don't want to block. So we just report that things are in
439 sink_writes(ev_writer_sink(c
->w
), "250 rescan already underway\n");
444 /* No rescan is underway. fresh is therefore irrelevant. */
446 /* We want to block until completion */
447 trackdb_rescan(c
->ev
, 1/*check*/, finished_rescan
, c
);
450 /* We don't want to block. */
451 trackdb_rescan(c
->ev
, 1/*check*/, 0, 0);
452 sink_writes(ev_writer_sink(c
->w
), "250 rescan initiated\n");
453 return 1; /* completed */
458 static int c_version(struct conn
*c
,
459 char attribute((unused
)) **vec
,
460 int attribute((unused
)) nvec
) {
461 /* VERSION had better only use the basic character set */
462 sink_printf(ev_writer_sink(c
->w
), "251 %s\n", disorder_short_version_string
);
463 return 1; /* completed */
466 static int c_playing(struct conn
*c
,
467 char attribute((unused
)) **vec
,
468 int attribute((unused
)) nvec
) {
470 queue_fix_sofar(playing
);
471 playing
->expected
= 0;
472 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", queue_marshall(playing
));
474 sink_printf(ev_writer_sink(c
->w
), "259 nothing playing\n");
475 return 1; /* completed */
478 static const char *connection_host(struct conn
*c
) {
481 struct sockaddr_in in
;
482 struct sockaddr_in6 in6
;
488 /* get connection data */
490 if(getpeername(c
->fd
, &u
.sa
, &l
) < 0) {
491 error(errno
, "S%x error calling getpeername", c
->tag
);
494 if(c
->l
->pf
!= PF_UNIX
) {
495 if((n
= getnameinfo(&u
.sa
, l
,
496 host
, sizeof host
, 0, 0, NI_NUMERICHOST
))) {
497 error(0, "S%x error calling getnameinfo: %s", c
->tag
, gai_strerror(n
));
500 return xstrdup(host
);
505 static int c_user(struct conn
*c
,
507 int attribute((unused
)) nvec
) {
509 const char *res
, *host
, *password
;
513 sink_writes(ev_writer_sink(c
->w
), "530 already authenticated\n");
516 /* get connection data */
517 if(!(host
= connection_host(c
))) {
518 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
522 k
= trackdb_getuserinfo(vec
[0]);
523 /* reject nonexistent users */
525 error(0, "S%x unknown user '%s' from %s", c
->tag
, vec
[0], host
);
526 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
529 /* reject unconfirmed users */
530 if(kvp_get(k
, "confirmation")) {
531 error(0, "S%x unconfirmed user '%s' from %s", c
->tag
, vec
[0], host
);
532 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
535 password
= kvp_get(k
, "password");
536 if(!password
) password
= "";
537 if(parse_rights(kvp_get(k
, "rights"), &rights
, 1)) {
538 error(0, "error parsing rights for %s", vec
[0]);
539 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
542 /* check whether the response is right */
543 res
= authhash(c
->nonce
, sizeof c
->nonce
, password
,
544 config
->authorization_algorithm
);
545 if(wideopen
|| (res
&& !strcmp(res
, vec
[1]))) {
548 /* currently we only bother logging remote connections */
549 if(strcmp(host
, "local"))
550 info("S%x %s connected from %s", c
->tag
, vec
[0], host
);
552 c
->rights
|= RIGHT__LOCAL
;
553 sink_writes(ev_writer_sink(c
->w
), "230 OK\n");
556 /* oops, response was wrong */
557 info("S%x authentication failure for %s from %s", c
->tag
, vec
[0], host
);
558 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
562 static int c_recent(struct conn
*c
,
563 char attribute((unused
)) **vec
,
564 int attribute((unused
)) nvec
) {
565 const struct queue_entry
*q
;
567 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
568 for(q
= phead
.next
; q
!= &phead
; q
= q
->next
)
569 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
570 sink_writes(ev_writer_sink(c
->w
), ".\n");
571 return 1; /* completed */
574 static int c_queue(struct conn
*c
,
575 char attribute((unused
)) **vec
,
576 int attribute((unused
)) nvec
) {
577 struct queue_entry
*q
;
582 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
583 if(playing_is_enabled() && !paused
) {
585 queue_fix_sofar(playing
);
586 if((l
= trackdb_get(playing
->track
, "_length"))
587 && (length
= atol(l
))) {
589 when
+= length
- playing
->sofar
+ config
->gap
;
592 /* Nothing is playing but playing is enabled, so whatever is
593 * first in the queue can be expected to start immediately. */
596 for(q
= qhead
.next
; q
!= &qhead
; q
= q
->next
) {
597 /* fill in estimated start time */
599 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
600 /* update for next track */
602 if((l
= trackdb_get(q
->track
, "_length"))
603 && (length
= atol(l
)))
604 when
+= length
+ config
->gap
;
609 sink_writes(ev_writer_sink(c
->w
), ".\n");
610 return 1; /* completed */
613 static int output_list(struct conn
*c
, char **vec
) {
615 sink_printf(ev_writer_sink(c
->w
), "%s\n", *vec
++);
616 sink_writes(ev_writer_sink(c
->w
), ".\n");
620 static int files_dirs(struct conn
*c
,
623 enum trackdb_listable what
) {
624 const char *dir
, *re
, *errstr
;
630 case 0: dir
= 0; re
= 0; break;
631 case 1: dir
= vec
[0]; re
= 0; break;
632 case 2: dir
= vec
[0]; re
= vec
[1]; break;
635 /* A bit of a bodge to make sure the args don't trample on cache keys */
636 if(dir
&& strchr(dir
, '\n')) {
637 sink_writes(ev_writer_sink(c
->w
), "550 invalid directory name\n");
640 if(re
&& strchr(re
, '\n')) {
641 sink_writes(ev_writer_sink(c
->w
), "550 invalid regexp\n");
644 /* We bother eliminating "" because the web interface is relatively
645 * likely to send it */
647 byte_xasprintf(&key
, "%d\n%s\n%s", (int)what
, dir ? dir
: "", re
);
648 fvec
= (char **)cache_get(&cache_files_type
, key
);
650 /* Got a cache hit, don't store the answer in the cache */
653 rec
= 0; /* quieten compiler */
655 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
657 if(!(rec
= pcre_compile(re
, PCRE_CASELESS
|PCRE_UTF8
,
658 &errstr
, &erroffset
, 0))) {
659 sink_printf(ev_writer_sink(c
->w
), "550 Error compiling regexp: %s\n",
663 /* It only counts as a miss if the regexp was valid. */
664 ++cache_files_misses
;
667 /* No regexp, don't bother caching the result */
673 /* No cache hit (either because a miss, or because we did not look) so do
676 fvec
= trackdb_list(dir
, 0, what
, rec
);
678 fvec
= trackdb_list(0, 0, what
, rec
);
681 /* Put the answer in the cache */
682 cache_put(&cache_files_type
, key
, fvec
);
683 sink_writes(ev_writer_sink(c
->w
), "253 Listing follow\n");
684 return output_list(c
, fvec
);
687 static int c_files(struct conn
*c
,
690 return files_dirs(c
, vec
, nvec
, trackdb_files
);
693 static int c_dirs(struct conn
*c
,
696 return files_dirs(c
, vec
, nvec
, trackdb_directories
);
699 static int c_allfiles(struct conn
*c
,
702 return files_dirs(c
, vec
, nvec
, trackdb_directories
|trackdb_files
);
705 static int c_get(struct conn
*c
,
707 int attribute((unused
)) nvec
) {
708 const char *v
, *track
;
710 if(!(track
= trackdb_resolve(vec
[0]))) {
711 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
714 if(vec
[1][0] != '_' && (v
= trackdb_get(track
, vec
[1])))
715 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(v
));
717 sink_writes(ev_writer_sink(c
->w
), "555 not found\n");
721 static int c_length(struct conn
*c
,
723 int attribute((unused
)) nvec
) {
724 const char *track
, *v
;
726 if(!(track
= trackdb_resolve(vec
[0]))) {
727 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
730 if((v
= trackdb_get(track
, "_length")))
731 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(v
));
733 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
737 static int c_set(struct conn
*c
,
739 int attribute((unused
)) nvec
) {
742 if(!(track
= trackdb_resolve(vec
[0]))) {
743 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
746 if(vec
[1][0] != '_' && !trackdb_set(track
, vec
[1], vec
[2]))
747 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
749 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
753 static int c_prefs(struct conn
*c
,
755 int attribute((unused
)) nvec
) {
759 if(!(track
= trackdb_resolve(vec
[0]))) {
760 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
763 k
= trackdb_get_all(track
);
764 sink_writes(ev_writer_sink(c
->w
), "253 prefs follow\n");
765 for(; k
; k
= k
->next
)
766 if(k
->name
[0] != '_') /* omit internal values */
767 sink_printf(ev_writer_sink(c
->w
),
768 " %s %s\n", quoteutf8(k
->name
), quoteutf8(k
->value
));
769 sink_writes(ev_writer_sink(c
->w
), ".\n");
773 static int c_exists(struct conn
*c
,
775 int attribute((unused
)) nvec
) {
776 /* trackdb_exists() does its own alias checking */
777 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[trackdb_exists(vec
[0])]);
781 static void search_parse_error(const char *msg
, void *u
) {
782 *(const char **)u
= msg
;
785 static int c_search(struct conn
*c
,
787 int attribute((unused
)) nvec
) {
788 char **terms
, **results
;
789 int nterms
, nresults
, n
;
790 const char *e
= "unknown error";
792 /* This is a bit of a bodge. Initially it's there to make the eclient
793 * interface a bit more convenient to add searching to, but it has the more
794 * compelling advantage that if everything uses it, then interpretation of
795 * user-supplied search strings will be the same everywhere. */
796 if(!(terms
= split(vec
[0], &nterms
, SPLIT_QUOTES
, search_parse_error
, &e
))) {
797 sink_printf(ev_writer_sink(c
->w
), "550 %s\n", e
);
799 results
= trackdb_search(terms
, nterms
, &nresults
);
800 sink_printf(ev_writer_sink(c
->w
), "253 %d matches\n", nresults
);
801 for(n
= 0; n
< nresults
; ++n
)
802 sink_printf(ev_writer_sink(c
->w
), "%s\n", results
[n
]);
803 sink_writes(ev_writer_sink(c
->w
), ".\n");
808 static int c_random_enable(struct conn
*c
,
809 char attribute((unused
)) **vec
,
810 int attribute((unused
)) nvec
) {
811 enable_random(c
->who
, c
->ev
);
812 /* Enable implicitly unpauses if there is nothing playing */
813 if(paused
&& !playing
) resume_playing(c
->who
);
814 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
815 return 1; /* completed */
818 static int c_random_disable(struct conn
*c
,
819 char attribute((unused
)) **vec
,
820 int attribute((unused
)) nvec
) {
821 disable_random(c
->who
);
822 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
823 return 1; /* completed */
826 static int c_random_enabled(struct conn
*c
,
827 char attribute((unused
)) **vec
,
828 int attribute((unused
)) nvec
) {
829 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[random_is_enabled()]);
830 return 1; /* completed */
833 static void got_stats(char *stats
, void *u
) {
834 struct conn
*const c
= u
;
836 sink_printf(ev_writer_sink(c
->w
), "253 stats\n%s\n.\n", stats
);
837 /* Now we can start processing commands again */
838 ev_reader_enable(c
->r
);
841 static int c_stats(struct conn
*c
,
842 char attribute((unused
)) **vec
,
843 int attribute((unused
)) nvec
) {
844 trackdb_stats_subprocess(c
->ev
, got_stats
, c
);
845 return 0; /* not yet complete */
848 static int c_volume(struct conn
*c
,
860 l
= r
= atoi(vec
[0]);
871 rights
= set ? RIGHT_VOLUME
: RIGHT_READ
;
872 if(!(c
->rights
& rights
)) {
873 error(0, "%s attempted to set volume but lacks required rights", c
->who
);
874 sink_writes(ev_writer_sink(c
->w
), "510 Prohibited\n");
877 if(mixer_control(-1/*as configured*/, &l
, &r
, set
))
878 sink_writes(ev_writer_sink(c
->w
), "550 error accessing mixer\n");
880 sink_printf(ev_writer_sink(c
->w
), "252 %d %d\n", l
, r
);
881 if(l
!= volume_left
|| r
!= volume_right
) {
884 snprintf(lb
, sizeof lb
, "%d", l
);
885 snprintf(rb
, sizeof rb
, "%d", r
);
886 eventlog("volume", lb
, rb
, (char *)0);
892 /** @brief Called when data arrives on a log connection
894 * We just discard all such data. The client may occasionally send data as a
897 static int logging_reader_callback(ev_source
attribute((unused
)) *ev
,
899 void attribute((unused
)) *ptr
,
901 int attribute((unused
)) eof
,
902 void attribute((unused
)) *u
) {
905 ev_reader_consume(reader
, bytes
);
907 /* Oops, that's all for now */
908 D(("logging reader eof"));
911 ev_writer_close(c
->w
);
915 remove_connection(c
);
920 static void logclient(const char *msg
, void *user
) {
921 struct conn
*c
= user
;
924 /* This connection has gone up in smoke for some reason */
925 eventlog_remove(c
->lo
);
929 /* user_* messages are restricted */
930 if(!strncmp(msg
, "user_", 5)) {
931 /* They are only sent to admin users */
932 if(!(c
->rights
& RIGHT_ADMIN
))
934 /* They are not sent over TCP connections unless remote user-management is
936 if(!config
->remote_userman
&& !(c
->rights
& RIGHT__LOCAL
))
939 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" %s\n",
940 (uintmax_t)time(0), msg
);
943 static int c_log(struct conn
*c
,
944 char attribute((unused
)) **vec
,
945 int attribute((unused
)) nvec
) {
948 sink_writes(ev_writer_sink(c
->w
), "254 OK\n");
949 /* pump out initial state */
951 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
953 playing_is_enabled() ?
"enable_play" : "disable_play");
954 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
956 random_is_enabled() ?
"enable_random" : "disable_random");
957 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
959 paused ?
"pause" : "resume");
961 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state playing\n",
964 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" volume %d %d\n",
965 (uintmax_t)now
, volume_left
, volume_right
);
966 c
->lo
= xmalloc(sizeof *c
->lo
);
967 c
->lo
->fn
= logclient
;
970 c
->reader
= logging_reader_callback
;
974 /** @brief Test whether a move is allowed
975 * @param c Connection
976 * @param qs List of IDs on queue
977 * @param nqs Number of IDs
978 * @return 0 if move is prohibited, non-0 if it is allowed
980 static int has_move_rights(struct conn
*c
, struct queue_entry
**qs
, int nqs
) {
981 for(; nqs
> 0; ++qs
, --nqs
) {
982 struct queue_entry
*const q
= *qs
;
984 if(!right_movable(c
->rights
, c
->who
, q
))
990 static int c_move(struct conn
*c
,
992 int attribute((unused
)) nvec
) {
993 struct queue_entry
*q
;
996 if(!(q
= queue_find(vec
[0]))) {
997 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
1000 if(!has_move_rights(c
, &q
, 1)) {
1001 error(0, "%s attempted move but lacks required rights", c
->who
);
1002 sink_writes(ev_writer_sink(c
->w
),
1003 "510 Not authorized to move that track\n");
1006 n
= queue_move(q
, atoi(vec
[1]), c
->who
);
1007 sink_printf(ev_writer_sink(c
->w
), "252 %d\n", n
);
1008 /* If we've moved to the head of the queue then prepare the track. */
1014 static int c_moveafter(struct conn
*c
,
1016 int attribute((unused
)) nvec
) {
1017 struct queue_entry
*q
, **qs
;
1021 if(!(q
= queue_find(vec
[0]))) {
1022 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
1029 qs
= xcalloc(nvec
, sizeof *qs
);
1030 for(n
= 0; n
< nvec
; ++n
)
1031 if(!(qs
[n
] = queue_find(vec
[n
]))) {
1032 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
1035 if(!has_move_rights(c
, qs
, nvec
)) {
1036 error(0, "%s attempted moveafter but lacks required rights", c
->who
);
1037 sink_writes(ev_writer_sink(c
->w
),
1038 "510 Not authorized to move those tracks\n");
1041 queue_moveafter(q
, nvec
, qs
, c
->who
);
1042 sink_printf(ev_writer_sink(c
->w
), "250 Moved tracks\n");
1043 /* If we've moved to the head of the queue then prepare the track. */
1049 static int c_part(struct conn
*c
,
1051 int attribute((unused
)) nvec
) {
1054 if(!(track
= trackdb_resolve(vec
[0]))) {
1055 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
1058 sink_printf(ev_writer_sink(c
->w
), "252 %s\n",
1059 quoteutf8(trackdb_getpart(track
, vec
[1], vec
[2])));
1063 static int c_resolve(struct conn
*c
,
1065 int attribute((unused
)) nvec
) {
1068 if(!(track
= trackdb_resolve(vec
[0]))) {
1069 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
1072 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(track
));
1076 static int list_response(struct conn
*c
,
1079 sink_printf(ev_writer_sink(c
->w
), "253 %s\n", reply
);
1081 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
1082 **list
== '.' ?
"." : "", *list
);
1085 sink_writes(ev_writer_sink(c
->w
), ".\n");
1086 return 1; /* completed */
1089 static int c_tags(struct conn
*c
,
1090 char attribute((unused
)) **vec
,
1091 int attribute((unused
)) nvec
) {
1092 return list_response(c
, "Tag list follows", trackdb_alltags());
1095 static int c_set_global(struct conn
*c
,
1097 int attribute((unused
)) nvec
) {
1098 if(vec
[0][0] == '_') {
1099 sink_writes(ev_writer_sink(c
->w
), "550 cannot set internal global preferences\n");
1102 trackdb_set_global(vec
[0], vec
[1], c
->who
);
1103 sink_printf(ev_writer_sink(c
->w
), "250 OK\n");
1107 static int c_get_global(struct conn
*c
,
1109 int attribute((unused
)) nvec
) {
1110 const char *s
= trackdb_get_global(vec
[0]);
1113 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(s
));
1115 sink_writes(ev_writer_sink(c
->w
), "555 not found\n");
1119 static int c_nop(struct conn
*c
,
1120 char attribute((unused
)) **vec
,
1121 int attribute((unused
)) nvec
) {
1122 sink_printf(ev_writer_sink(c
->w
), "250 Quack\n");
1126 static int c_new(struct conn
*c
,
1136 if(max
<= 0 || max
> config
->new_max
)
1137 max
= config
->new_max
;
1138 tracks
= trackdb_new(0, max
);
1139 sink_printf(ev_writer_sink(c
->w
), "253 New track list follows\n");
1142 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
1143 **tracks
== '.' ?
"." : "", *tracks
);
1146 sink_writes(ev_writer_sink(c
->w
), ".\n");
1147 return 1; /* completed */
1151 static int c_rtp_address(struct conn
*c
,
1152 char attribute((unused
)) **vec
,
1153 int attribute((unused
)) nvec
) {
1154 if(config
->api
== BACKEND_NETWORK
) {
1155 sink_printf(ev_writer_sink(c
->w
), "252 %s %s\n",
1156 quoteutf8(config
->broadcast
.s
[0]),
1157 quoteutf8(config
->broadcast
.s
[1]));
1159 sink_writes(ev_writer_sink(c
->w
), "550 No RTP\n");
1163 static int c_cookie(struct conn
*c
,
1165 int attribute((unused
)) nvec
) {
1170 /* Can't log in twice on the same connection */
1172 sink_writes(ev_writer_sink(c
->w
), "530 already authenticated\n");
1175 /* Get some kind of peer identifcation */
1176 if(!(host
= connection_host(c
))) {
1177 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
1180 /* Check the cookie */
1181 user
= verify_cookie(vec
[0], &rights
);
1183 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
1190 if(strcmp(host
, "local"))
1191 info("S%x %s connected with cookie from %s", c
->tag
, user
, host
);
1193 c
->rights
|= RIGHT__LOCAL
;
1194 /* Response contains username so client knows who they are acting as */
1195 sink_printf(ev_writer_sink(c
->w
), "232 %s\n", quoteutf8(user
));
1199 static int c_make_cookie(struct conn
*c
,
1200 char attribute((unused
)) **vec
,
1201 int attribute((unused
)) nvec
) {
1202 const char *cookie
= make_cookie(c
->who
);
1205 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(cookie
));
1207 sink_writes(ev_writer_sink(c
->w
), "550 Cannot create cookie\n");
1211 static int c_revoke(struct conn
*c
,
1212 char attribute((unused
)) **vec
,
1213 int attribute((unused
)) nvec
) {
1215 revoke_cookie(c
->cookie
);
1216 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1218 sink_writes(ev_writer_sink(c
->w
), "550 Did not log in with cookie\n");
1222 static int c_adduser(struct conn
*c
,
1227 if(!config
->remote_userman
&& !(c
->rights
& RIGHT__LOCAL
)) {
1228 error(0, "S%x: remote adduser", c
->tag
);
1229 sink_writes(ev_writer_sink(c
->w
), "550 Remote user management is disabled\n");
1234 if(parse_rights(vec
[2], 0, 1)) {
1235 sink_writes(ev_writer_sink(c
->w
), "550 Invalid rights list\n");
1239 rights
= config
->default_rights
;
1240 if(trackdb_adduser(vec
[0], vec
[1], rights
,
1241 0/*email*/, 0/*confirmation*/))
1242 sink_writes(ev_writer_sink(c
->w
), "550 Cannot create user\n");
1244 sink_writes(ev_writer_sink(c
->w
), "250 User created\n");
1248 static int c_deluser(struct conn
*c
,
1250 int attribute((unused
)) nvec
) {
1253 if(!config
->remote_userman
&& !(c
->rights
& RIGHT__LOCAL
)) {
1254 error(0, "S%x: remote deluser", c
->tag
);
1255 sink_writes(ev_writer_sink(c
->w
), "550 Remote user management is disabled\n");
1258 if(trackdb_deluser(vec
[0])) {
1259 sink_writes(ev_writer_sink(c
->w
), "550 Cannot delete user\n");
1262 /* Zap connections belonging to deleted user */
1263 for(d
= connections
; d
; d
= d
->next
)
1264 if(!strcmp(d
->who
, vec
[0]))
1266 sink_writes(ev_writer_sink(c
->w
), "250 User deleted\n");
1270 static int c_edituser(struct conn
*c
,
1272 int attribute((unused
)) nvec
) {
1275 if(!config
->remote_userman
&& !(c
->rights
& RIGHT__LOCAL
)) {
1276 error(0, "S%x: remote edituser", c
->tag
);
1277 sink_writes(ev_writer_sink(c
->w
), "550 Remote user management is disabled\n");
1280 /* RIGHT_ADMIN can do anything; otherwise you can only set your own email
1281 * address and password. */
1282 if((c
->rights
& RIGHT_ADMIN
)
1283 || (!strcmp(c
->who
, vec
[0])
1284 && (!strcmp(vec
[1], "email")
1285 || !strcmp(vec
[1], "password")))) {
1286 if(trackdb_edituserinfo(vec
[0], vec
[1], vec
[2])) {
1287 sink_writes(ev_writer_sink(c
->w
), "550 Failed to change setting\n");
1290 if(!strcmp(vec
[1], "password")) {
1291 /* Zap all connections for this user after a password change */
1292 for(d
= connections
; d
; d
= d
->next
)
1293 if(!strcmp(d
->who
, vec
[0]))
1295 } else if(!strcmp(vec
[1], "rights")) {
1296 /* Update rights for this user */
1299 if(!parse_rights(vec
[2], &r
, 1)) {
1300 const char *new_rights
= rights_string(r
);
1301 for(d
= connections
; d
; d
= d
->next
) {
1302 if(!strcmp(d
->who
, vec
[0])) {
1305 /* Notify any log connections */
1307 sink_printf(ev_writer_sink(d
->w
),
1308 "%"PRIxMAX
" rights_changed %s\n",
1310 quoteutf8(new_rights
));
1315 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1317 error(0, "%s attempted edituser but lacks required rights", c
->who
);
1318 sink_writes(ev_writer_sink(c
->w
), "510 Restricted to administrators\n");
1323 static int c_userinfo(struct conn
*c
,
1324 char attribute((unused
)) **vec
,
1325 int attribute((unused
)) nvec
) {
1329 /* We allow remote querying of rights so that clients can figure out what
1330 * they're allowed to do */
1331 if(!config
->remote_userman
1332 && !(c
->rights
& RIGHT__LOCAL
)
1333 && strcmp(vec
[1], "rights")) {
1334 error(0, "S%x: remote userinfo %s %s", c
->tag
, vec
[0], vec
[1]);
1335 sink_writes(ev_writer_sink(c
->w
), "550 Remote user management is disabled\n");
1338 /* RIGHT_ADMIN allows anything; otherwise you can only get your own email
1339 * address and rights list. */
1340 if((c
->rights
& RIGHT_ADMIN
)
1341 || (!strcmp(c
->who
, vec
[0])
1342 && (!strcmp(vec
[1], "email")
1343 || !strcmp(vec
[1], "rights")))) {
1344 if((k
= trackdb_getuserinfo(vec
[0])))
1345 if((value
= kvp_get(k
, vec
[1])))
1346 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(value
));
1348 sink_writes(ev_writer_sink(c
->w
), "555 Not set\n");
1350 sink_writes(ev_writer_sink(c
->w
), "550 No such user\n");
1352 error(0, "%s attempted userinfo but lacks required rights", c
->who
);
1353 sink_writes(ev_writer_sink(c
->w
), "510 Restricted to administrators\n");
1358 static int c_users(struct conn
*c
,
1359 char attribute((unused
)) **vec
,
1360 int attribute((unused
)) nvec
) {
1361 return list_response(c
, "User list follows", trackdb_listusers());
1364 /** @brief Base64 mapping table for confirmation strings
1366 * This is used with generic_to_base64() and generic_base64(). We cannot use
1367 * the MIME table as that contains '+' and '=' which get quoted when
1368 * URL-encoding. (The CGI still does the URL encoding but it is desirable to
1369 * avoid it being necessary.)
1371 static const char confirm_base64_table
[] =
1372 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789/.*";
1374 static int c_register(struct conn
*c
,
1376 int attribute((unused
)) nvec
) {
1381 /* The confirmation string is base64(username;nonce) */
1382 bufsize
= strlen(vec
[0]) + CONFIRM_SIZE
+ 2;
1383 buf
= xmalloc_noptr(bufsize
);
1384 offset
= byte_snprintf(buf
, bufsize
, "%s;", vec
[0]);
1385 gcry_randomize(buf
+ offset
, CONFIRM_SIZE
, GCRY_STRONG_RANDOM
);
1386 cs
= generic_to_base64((uint8_t *)buf
, offset
+ CONFIRM_SIZE
,
1387 confirm_base64_table
);
1388 if(trackdb_adduser(vec
[0], vec
[1], config
->default_rights
, vec
[2], cs
))
1389 sink_writes(ev_writer_sink(c
->w
), "550 Cannot create user\n");
1391 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(cs
));
1395 static int c_confirm(struct conn
*c
,
1397 int attribute((unused
)) nvec
) {
1403 /* Get some kind of peer identifcation */
1404 if(!(host
= connection_host(c
))) {
1405 sink_writes(ev_writer_sink(c
->w
), "530 Authentication failure\n");
1408 if(!(user
= generic_base64(vec
[0], &nuser
, confirm_base64_table
))
1409 || !(sep
= memchr(user
, ';', nuser
))) {
1410 sink_writes(ev_writer_sink(c
->w
), "550 Malformed confirmation string\n");
1414 if(trackdb_confirm(user
, vec
[0], &rights
))
1415 sink_writes(ev_writer_sink(c
->w
), "550 Incorrect confirmation string\n");
1420 if(strcmp(host
, "local"))
1421 info("S%x %s confirmed from %s", c
->tag
, user
, host
);
1423 c
->rights
|= RIGHT__LOCAL
;
1424 /* Response contains username so client knows who they are acting as */
1425 sink_printf(ev_writer_sink(c
->w
), "232 %s\n", quoteutf8(user
));
1430 static int sent_reminder(ev_source
attribute((unused
)) *ev
,
1431 pid_t
attribute((unused
)) pid
,
1433 const struct rusage
attribute((unused
)) *rusage
,
1435 struct conn
*const c
= u
;
1437 /* Tell the client what went down */
1439 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1441 error(0, "reminder subprocess %s", wstat(status
));
1442 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1444 /* Re-enable this connection */
1445 ev_reader_enable(c
->r
);
1449 static int c_reminder(struct conn
*c
,
1451 int attribute((unused
)) nvec
) {
1453 const char *password
, *email
, *text
, *encoding
, *charset
, *content_type
;
1458 static hash
*last_reminder
;
1460 if(!config
->mail_sender
) {
1461 error(0, "cannot send password reminders because mail_sender not set");
1462 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1465 if(!(k
= trackdb_getuserinfo(vec
[0]))) {
1466 error(0, "reminder for user '%s' who does not exist", vec
[0]);
1467 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1470 if(!(email
= kvp_get(k
, "email"))
1471 || !email_valid(email
)) {
1472 error(0, "user '%s' has no valid email address", vec
[0]);
1473 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1476 if(!(password
= kvp_get(k
, "password"))
1478 error(0, "user '%s' has no password", vec
[0]);
1479 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1482 /* Rate-limit reminders. This hash is bounded in size by the number of
1483 * users. If this is actually a problem for anyone then we can periodically
1486 last_reminder
= hash_new(sizeof (time_t));
1487 last
= hash_find(last_reminder
, vec
[0]);
1489 if(last
&& now
< *last
+ config
->reminder_interval
) {
1490 error(0, "sent a password reminder to '%s' too recently", vec
[0]);
1491 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1494 /* Send the reminder */
1495 /* TODO this should be templatized and to some extent merged with
1496 * the code in act_register() */
1497 byte_xasprintf((char **)&text
,
1498 "Someone requested that you be sent a reminder of your DisOrder password.\n"
1499 "Your password is:\n"
1502 if(!(text
= mime_encode_text(text
, &charset
, &encoding
)))
1503 fatal(0, "cannot encode email");
1504 byte_xasprintf((char **)&content_type
, "text/plain;charset=%s",
1505 quote822(charset
, 0));
1506 pid
= sendmail_subprocess("", config
->mail_sender
, email
,
1507 "DisOrder password reminder",
1508 encoding
, content_type
, text
);
1510 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1513 hash_add(last_reminder
, vec
[0], &now
, HASH_INSERT_OR_REPLACE
);
1514 info("sending a passsword reminder to user '%s'", vec
[0]);
1515 /* We can only continue when the subprocess finishes */
1516 ev_child(c
->ev
, pid
, 0, sent_reminder
, c
);
1520 static int c_schedule_list(struct conn
*c
,
1521 char attribute((unused
)) **vec
,
1522 int attribute((unused
)) nvec
) {
1523 char **ids
= schedule_list(0);
1524 sink_writes(ev_writer_sink(c
->w
), "253 ID list follows\n");
1526 sink_printf(ev_writer_sink(c
->w
), "%s\n", *ids
++);
1527 sink_writes(ev_writer_sink(c
->w
), ".\n");
1528 return 1; /* completed */
1531 static int c_schedule_get(struct conn
*c
,
1533 int attribute((unused
)) nvec
) {
1534 struct kvp
*actiondata
= schedule_get(vec
[0]), *k
;
1537 sink_writes(ev_writer_sink(c
->w
), "555 No such event\n");
1538 return 1; /* completed */
1540 /* Scheduled events are public information. Anyone with RIGHT_READ can see
1542 sink_writes(ev_writer_sink(c
->w
), "253 Event information follows\n");
1543 for(k
= actiondata
; k
; k
= k
->next
)
1544 sink_printf(ev_writer_sink(c
->w
), " %s %s\n",
1545 quoteutf8(k
->name
), quoteutf8(k
->value
));
1546 sink_writes(ev_writer_sink(c
->w
), ".\n");
1547 return 1; /* completed */
1550 static int c_schedule_del(struct conn
*c
,
1552 int attribute((unused
)) nvec
) {
1553 struct kvp
*actiondata
= schedule_get(vec
[0]);
1556 sink_writes(ev_writer_sink(c
->w
), "555 No such event\n");
1557 return 1; /* completed */
1559 /* If you have admin rights you can delete anything. If you don't then you
1560 * can only delete your own scheduled events. */
1561 if(!(c
->rights
& RIGHT_ADMIN
)) {
1562 const char *who
= kvp_get(actiondata
, "who");
1564 if(!who
|| !c
->who
|| strcmp(who
, c
->who
)) {
1565 sink_writes(ev_writer_sink(c
->w
), "551 Not authorized\n");
1566 return 1; /* completed */
1569 if(schedule_del(vec
[0]))
1570 sink_writes(ev_writer_sink(c
->w
), "550 Could not delete scheduled event\n");
1572 sink_writes(ev_writer_sink(c
->w
), "250 Deleted\n");
1573 return 1; /* completed */
1576 static int c_schedule_add(struct conn
*c
,
1579 struct kvp
*actiondata
= 0;
1582 /* Standard fields */
1583 kvp_set(&actiondata
, "who", c
->who
);
1584 kvp_set(&actiondata
, "when", vec
[0]);
1585 kvp_set(&actiondata
, "priority", vec
[1]);
1586 kvp_set(&actiondata
, "action", vec
[2]);
1587 /* Action-dependent fields */
1588 if(!strcmp(vec
[2], "play")) {
1590 sink_writes(ev_writer_sink(c
->w
), "550 Wrong number of arguments\n");
1593 if(!trackdb_exists(vec
[3])) {
1594 sink_writes(ev_writer_sink(c
->w
), "550 Track is not in database\n");
1597 kvp_set(&actiondata
, "track", vec
[3]);
1598 } else if(!strcmp(vec
[2], "set-global")) {
1599 if(nvec
< 4 || nvec
> 5) {
1600 sink_writes(ev_writer_sink(c
->w
), "550 Wrong number of arguments\n");
1603 kvp_set(&actiondata
, "key", vec
[3]);
1605 kvp_set(&actiondata
, "value", vec
[4]);
1607 sink_writes(ev_writer_sink(c
->w
), "550 Unknown action\n");
1610 /* schedule_add() checks user rights */
1611 id
= schedule_add(c
->ev
, actiondata
);
1613 sink_writes(ev_writer_sink(c
->w
), "550 Cannot add scheduled event\n");
1615 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", id
);
1619 static int c_adopt(struct conn
*c
,
1621 int attribute((unused
)) nvec
) {
1622 struct queue_entry
*q
;
1625 sink_writes(ev_writer_sink(c
->w
), "550 no identity\n");
1628 if(!(q
= queue_find(vec
[0]))) {
1629 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
1632 if(q
->origin
!= origin_random
) {
1633 sink_writes(ev_writer_sink(c
->w
), "550 not a random track\n");
1636 q
->origin
= origin_adopted
;
1637 q
->submitter
= xstrdup(c
->who
);
1638 eventlog("adopted", q
->id
, q
->submitter
, (char *)0);
1640 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1644 static int playlist_response(struct conn
*c
,
1648 assert(!"cannot cope with success");
1650 sink_writes(ev_writer_sink(c
->w
), "550 Access denied\n");
1653 sink_writes(ev_writer_sink(c
->w
), "550 Invalid playlist name\n");
1656 sink_writes(ev_writer_sink(c
->w
), "555 No such playlist\n");
1659 sink_writes(ev_writer_sink(c
->w
), "550 Error accessing playlist\n");
1665 static int c_playlist_get(struct conn
*c
,
1667 int attribute((unused
)) nvec
) {
1671 if(!(err
= trackdb_playlist_get(vec
[0], c
->who
, &tracks
, 0, 0)))
1672 return list_response(c
, "Playlist contents follows", tracks
);
1674 return playlist_response(c
, err
);
1677 static int c_playlist_set(struct conn
*c
,
1679 int attribute((unused
)) nvec
) {
1680 return fetch_body(c
, c_playlist_set_body
, vec
[0]);
1683 static int c_playlist_set_body(struct conn
*c
,
1687 const char *playlist
= u
;
1690 if(!c
->locked_playlist
1691 || strcmp(playlist
, c
->locked_playlist
)) {
1692 sink_writes(ev_writer_sink(c
->w
), "550 Playlist is not locked\n");
1695 if(!(err
= trackdb_playlist_set(playlist
, c
->who
,
1697 sink_printf(ev_writer_sink(c
->w
), "250 OK\n");
1700 return playlist_response(c
, err
);
1703 static int c_playlist_get_share(struct conn
*c
,
1705 int attribute((unused
)) nvec
) {
1709 if(!(err
= trackdb_playlist_get(vec
[0], c
->who
, 0, 0, &share
))) {
1710 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(share
));
1713 return playlist_response(c
, err
);
1716 static int c_playlist_set_share(struct conn
*c
,
1718 int attribute((unused
)) nvec
) {
1721 if(!(err
= trackdb_playlist_set(vec
[0], c
->who
, 0, 0, vec
[1]))) {
1722 sink_printf(ev_writer_sink(c
->w
), "250 OK\n");
1725 return playlist_response(c
, err
);
1728 static int c_playlists(struct conn
*c
,
1729 char attribute((unused
)) **vec
,
1730 int attribute((unused
)) nvec
) {
1733 trackdb_playlist_list(c
->who
, &p
, 0);
1734 return list_response(c
, "List of playlists follows", p
);
1737 static int c_playlist_delete(struct conn
*c
,
1739 int attribute((unused
)) nvec
) {
1742 if(!(err
= trackdb_playlist_delete(vec
[0], c
->who
))) {
1743 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1746 return playlist_response(c
, err
);
1749 static int c_playlist_lock(struct conn
*c
,
1751 int attribute((unused
)) nvec
) {
1755 /* Check we're allowed to modify this playlist */
1756 if((err
= trackdb_playlist_set(vec
[0], c
->who
, 0, 0, 0)))
1757 return playlist_response(c
, err
);
1758 /* If we hold a lock don't allow a new one */
1759 if(c
->locked_playlist
) {
1760 sink_writes(ev_writer_sink(c
->w
), "550 Already holding a lock\n");
1763 /* See if some other connection locks the same playlist */
1764 for(cc
= connections
; cc
; cc
= cc
->next
)
1765 if(cc
->locked_playlist
&& !strcmp(cc
->locked_playlist
, vec
[0]))
1768 /* TODO: implement config->playlist_lock_timeout */
1769 sink_writes(ev_writer_sink(c
->w
), "550 Already locked\n");
1772 c
->locked_playlist
= xstrdup(vec
[0]);
1773 time(&c
->locked_when
);
1774 sink_writes(ev_writer_sink(c
->w
), "250 Acquired lock\n");
1778 static int c_playlist_unlock(struct conn
*c
,
1779 char attribute((unused
)) **vec
,
1780 int attribute((unused
)) nvec
) {
1781 if(!c
->locked_playlist
) {
1782 sink_writes(ev_writer_sink(c
->w
), "550 Not holding a lock\n");
1785 c
->locked_playlist
= 0;
1786 sink_writes(ev_writer_sink(c
->w
), "250 Released lock\n");
1790 static const struct command
{
1791 /** @brief Command name */
1794 /** @brief Minimum number of arguments */
1797 /** @brief Maximum number of arguments */
1800 /** @brief Function to process command */
1801 int (*fn
)(struct conn
*, char **, int);
1803 /** @brief Rights required to execute command
1805 * 0 means that the command can be issued without logging in. If multiple
1806 * bits are listed here any of those rights will do.
1810 { "adduser", 2, 3, c_adduser
, RIGHT_ADMIN
|RIGHT__LOCAL
},
1811 { "adopt", 1, 1, c_adopt
, RIGHT_PLAY
},
1812 { "allfiles", 0, 2, c_allfiles
, RIGHT_READ
},
1813 { "confirm", 1, 1, c_confirm
, 0 },
1814 { "cookie", 1, 1, c_cookie
, 0 },
1815 { "deluser", 1, 1, c_deluser
, RIGHT_ADMIN
|RIGHT__LOCAL
},
1816 { "dirs", 0, 2, c_dirs
, RIGHT_READ
},
1817 { "disable", 0, 1, c_disable
, RIGHT_GLOBAL_PREFS
},
1818 { "edituser", 3, 3, c_edituser
, RIGHT_ADMIN
|RIGHT_USERINFO
},
1819 { "enable", 0, 0, c_enable
, RIGHT_GLOBAL_PREFS
},
1820 { "enabled", 0, 0, c_enabled
, RIGHT_READ
},
1821 { "exists", 1, 1, c_exists
, RIGHT_READ
},
1822 { "files", 0, 2, c_files
, RIGHT_READ
},
1823 { "get", 2, 2, c_get
, RIGHT_READ
},
1824 { "get-global", 1, 1, c_get_global
, RIGHT_READ
},
1825 { "length", 1, 1, c_length
, RIGHT_READ
},
1826 { "log", 0, 0, c_log
, RIGHT_READ
},
1827 { "make-cookie", 0, 0, c_make_cookie
, RIGHT_READ
},
1828 { "move", 2, 2, c_move
, RIGHT_MOVE__MASK
},
1829 { "moveafter", 1, INT_MAX
, c_moveafter
, RIGHT_MOVE__MASK
},
1830 { "new", 0, 1, c_new
, RIGHT_READ
},
1831 { "nop", 0, 0, c_nop
, 0 },
1832 { "part", 3, 3, c_part
, RIGHT_READ
},
1833 { "pause", 0, 0, c_pause
, RIGHT_PAUSE
},
1834 { "play", 1, 1, c_play
, RIGHT_PLAY
},
1835 { "playing", 0, 0, c_playing
, RIGHT_READ
},
1836 { "playlist-delete", 1, 1, c_playlist_delete
, RIGHT_PLAY
},
1837 { "playlist-get", 1, 1, c_playlist_get
, RIGHT_READ
},
1838 { "playlist-get-share", 1, 1, c_playlist_get_share
, RIGHT_READ
},
1839 { "playlist-lock", 1, 1, c_playlist_lock
, RIGHT_PLAY
},
1840 { "playlist-set", 1, 1, c_playlist_set
, RIGHT_PLAY
},
1841 { "playlist-set-share", 2, 2, c_playlist_set_share
, RIGHT_PLAY
},
1842 { "playlist-unlock", 0, 0, c_playlist_unlock
, RIGHT_PLAY
},
1843 { "playlists", 0, 0, c_playlists
, RIGHT_READ
},
1844 { "prefs", 1, 1, c_prefs
, RIGHT_READ
},
1845 { "queue", 0, 0, c_queue
, RIGHT_READ
},
1846 { "random-disable", 0, 0, c_random_disable
, RIGHT_GLOBAL_PREFS
},
1847 { "random-enable", 0, 0, c_random_enable
, RIGHT_GLOBAL_PREFS
},
1848 { "random-enabled", 0, 0, c_random_enabled
, RIGHT_READ
},
1849 { "recent", 0, 0, c_recent
, RIGHT_READ
},
1850 { "reconfigure", 0, 0, c_reconfigure
, RIGHT_ADMIN
},
1851 { "register", 3, 3, c_register
, RIGHT_REGISTER
|RIGHT__LOCAL
},
1852 { "reminder", 1, 1, c_reminder
, RIGHT__LOCAL
},
1853 { "remove", 1, 1, c_remove
, RIGHT_REMOVE__MASK
},
1854 { "rescan", 0, INT_MAX
, c_rescan
, RIGHT_RESCAN
},
1855 { "resolve", 1, 1, c_resolve
, RIGHT_READ
},
1856 { "resume", 0, 0, c_resume
, RIGHT_PAUSE
},
1857 { "revoke", 0, 0, c_revoke
, RIGHT_READ
},
1858 { "rtp-address", 0, 0, c_rtp_address
, 0 },
1859 { "schedule-add", 3, INT_MAX
, c_schedule_add
, RIGHT_READ
},
1860 { "schedule-del", 1, 1, c_schedule_del
, RIGHT_READ
},
1861 { "schedule-get", 1, 1, c_schedule_get
, RIGHT_READ
},
1862 { "schedule-list", 0, 0, c_schedule_list
, RIGHT_READ
},
1863 { "scratch", 0, 1, c_scratch
, RIGHT_SCRATCH__MASK
},
1864 { "search", 1, 1, c_search
, RIGHT_READ
},
1865 { "set", 3, 3, c_set
, RIGHT_PREFS
, },
1866 { "set-global", 2, 2, c_set_global
, RIGHT_GLOBAL_PREFS
},
1867 { "shutdown", 0, 0, c_shutdown
, RIGHT_ADMIN
},
1868 { "stats", 0, 0, c_stats
, RIGHT_READ
},
1869 { "tags", 0, 0, c_tags
, RIGHT_READ
},
1870 { "unset", 2, 2, c_set
, RIGHT_PREFS
},
1871 { "unset-global", 1, 1, c_set_global
, RIGHT_GLOBAL_PREFS
},
1872 { "user", 2, 2, c_user
, 0 },
1873 { "userinfo", 2, 2, c_userinfo
, RIGHT_READ
},
1874 { "users", 0, 0, c_users
, RIGHT_READ
},
1875 { "version", 0, 0, c_version
, RIGHT_READ
},
1876 { "volume", 0, 2, c_volume
, RIGHT_READ
|RIGHT_VOLUME
}
1879 /** @brief Fetch a command body
1880 * @param c Connection
1881 * @param body_callback Called with body
1882 * @param u Passed to body_callback
1885 static int fetch_body(struct conn
*c
,
1886 body_callback_type body_callback
,
1888 assert(c
->line_reader
== command
);
1889 c
->line_reader
= body_line
;
1890 c
->body_callback
= body_callback
;
1892 vector_init(c
->body
);
1896 /** @brief @ref line_reader_type callback for command body lines
1897 * @param c Connection
1899 * @return 1 if complete, 0 if incomplete
1901 * Called from reader_callback().
1903 static int body_line(struct conn
*c
,
1908 /* That's the lot */
1909 c
->line_reader
= command
;
1910 vector_terminate(c
->body
);
1911 return c
->body_callback(c
, c
->body
->vec
, c
->body
->nvec
, c
->body_u
);
1914 vector_append(c
->body
, xstrdup(line
));
1915 return 1; /* completed */
1918 static void command_error(const char *msg
, void *u
) {
1921 sink_printf(ev_writer_sink(c
->w
), "500 parse error: %s\n", msg
);
1924 /** @brief @ref line_reader_type callback for commands
1925 * @param c Connection
1927 * @return 1 if complete, 0 if incomplete
1929 * Called from reader_callback().
1931 static int command(struct conn
*c
, char *line
) {
1935 D(("server command %s", line
));
1936 /* We force everything into NFC as early as possible */
1937 if(!(line
= utf8_compose_canon(line
, strlen(line
), 0))) {
1938 sink_writes(ev_writer_sink(c
->w
), "500 cannot normalize command\n");
1941 if(!(vec
= split(line
, &nvec
, SPLIT_QUOTES
, command_error
, c
))) {
1942 sink_writes(ev_writer_sink(c
->w
), "500 cannot parse command\n");
1946 sink_writes(ev_writer_sink(c
->w
), "500 do what?\n");
1949 if((n
= TABLE_FIND(commands
, name
, vec
[0])) < 0)
1950 sink_writes(ev_writer_sink(c
->w
), "500 unknown command\n");
1952 if(commands
[n
].rights
1953 && !(c
->rights
& commands
[n
].rights
)) {
1954 error(0, "%s attempted %s but lacks required rights", c
->who ? c
->who
: "NULL",
1956 sink_writes(ev_writer_sink(c
->w
), "510 Prohibited\n");
1961 if(nvec
< commands
[n
].minargs
) {
1962 sink_writes(ev_writer_sink(c
->w
), "500 missing argument(s)\n");
1965 if(nvec
> commands
[n
].maxargs
) {
1966 sink_writes(ev_writer_sink(c
->w
), "500 too many arguments\n");
1969 return commands
[n
].fn(c
, vec
, nvec
);
1971 return 1; /* completed */
1974 /* redirect to the right reader callback for our current state */
1975 static int redirect_reader_callback(ev_source
*ev
,
1983 return c
->reader(ev
, reader
, ptr
, bytes
, eof
, u
);
1986 /* the main command reader */
1987 static int reader_callback(ev_source
attribute((unused
)) *ev
,
1997 D(("server reader_callback"));
1998 while((eol
= memchr(ptr
, '\n', bytes
))) {
2000 ev_reader_consume(reader
, eol
- (char *)ptr
);
2001 complete
= c
->line_reader(c
, ptr
); /* usually command() */
2002 bytes
-= (eol
- (char *)ptr
);
2005 /* the command had better have set a new reader callback */
2007 /* there are further bytes to read, or we are at eof; arrange for the
2008 * command's reader callback to handle them */
2009 return ev_reader_incomplete(reader
);
2010 /* nothing's going on right now */
2013 /* command completed, we can go around and handle the next one */
2017 error(0, "S%x unterminated line", c
->tag
);
2018 D(("normal reader close"));
2021 D(("close associated writer"));
2022 ev_writer_close(c
->w
);
2025 remove_connection(c
);
2030 static int listen_callback(ev_source
*ev
,
2032 const struct sockaddr
attribute((unused
)) *remote
,
2033 socklen_t
attribute((unused
)) rlen
,
2035 const struct listener
*l
= u
;
2036 struct conn
*c
= xmalloc(sizeof *c
);
2037 static unsigned tags
;
2039 D(("server listen_callback fd %d (%s)", fd
, l
->name
));
2042 c
->next
= connections
;
2045 c
->w
= ev_writer_new(ev
, fd
, writer_error
, c
,
2048 error(0, "ev_writer_new for file inbound connection (fd=%d) failed",
2053 c
->r
= ev_reader_new(ev
, fd
, redirect_reader_callback
, reader_error
, c
,
2056 /* Main reason for failure is the FD is too big and that will already have
2058 fatal(0, "ev_reader_new for file inbound connection (fd=%d) failed", fd
);
2061 c
->reader
= reader_callback
;
2064 c
->line_reader
= command
;
2066 gcry_randomize(c
->nonce
, sizeof c
->nonce
, GCRY_STRONG_RANDOM
);
2067 sink_printf(ev_writer_sink(c
->w
), "231 %d %s %s\n",
2069 config
->authorization_algorithm
,
2070 hex(c
->nonce
, sizeof c
->nonce
));
2074 int server_start(ev_source
*ev
, int pf
,
2075 size_t socklen
, const struct sockaddr
*sa
,
2078 struct listener
*l
= xmalloc(sizeof *l
);
2079 static const int one
= 1;
2081 D(("server_init socket %s", name
));
2082 fd
= xsocket(pf
, SOCK_STREAM
, 0);
2083 xsetsockopt(fd
, SOL_SOCKET
, SO_REUSEADDR
, &one
, sizeof one
);
2084 if(bind(fd
, sa
, socklen
) < 0) {
2085 error(errno
, "error binding to %s", name
);
2093 if(ev_listen(ev
, fd
, listen_callback
, l
, "server listener"))
2098 int server_stop(ev_source
*ev
, int fd
) {
2100 return ev_listen_cancel(ev
, fd
);