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 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
21 #include "disorder-server.h"
24 # define NONCE_SIZE 16
28 # define CONFIRM_SIZE 10
31 int volume_left
, volume_right
; /* last known volume */
33 /** @brief Accept all well-formed login attempts
46 /** @brief Signature for line reader callback
49 * @return 0 if incomplete, 1 if complete
51 * @p line is 0-terminated and excludes the newline. It points into the
52 * input buffer so will become invalid shortly.
54 typedef int line_reader_type(struct conn
*c
,
57 /** @brief Signature for with-body command callbacks
59 * @param body List of body lines
60 * @param nbody Number of body lines
61 * @param u As passed to fetch_body()
62 * @return 0 to suspend input, 1 if complete
64 * The body strings are allocated (so survive indefinitely) and don't include
67 typedef int body_callback_type(struct conn
*c
,
72 /** @brief One client connection */
74 /** @brief Read commands from here */
76 /** @brief Send responses to here */
78 /** @brief Underlying file descriptor */
80 /** @brief Unique identifier for connection used in log messages */
82 /** @brief Login name or NULL */
84 /** @brief Event loop */
86 /** @brief Nonce chosen for this connection */
87 unsigned char nonce
[NONCE_SIZE
];
88 /** @brief Current reader callback
90 * We change this depending on whether we're servicing the @b log command
92 ev_reader_callback
*reader
;
93 /** @brief Event log output sending to this connection */
94 struct eventlog_output
*lo
;
95 /** @brief Parent listener */
96 const struct listener
*l
;
97 /** @brief Login cookie or NULL */
99 /** @brief Connection rights */
101 /** @brief Next connection */
103 /** @brief True if pending rescan had 'wait' set */
105 /** @brief Playlist that this connection locks */
106 const char *locked_playlist
;
107 /** @brief When that playlist was locked */
109 /** @brief Line reader function */
110 line_reader_type
*line_reader
;
111 /** @brief Called when command body has been read */
112 body_callback_type
*body_callback
;
113 /** @brief Passed to @c body_callback */
115 /** @brief Accumulating body */
116 struct vector body
[1];
119 /** @brief Linked list of connections */
120 static struct conn
*connections
;
122 static int reader_callback(ev_source
*ev
,
128 static int c_playlist_set_body(struct conn
*c
,
132 static int fetch_body(struct conn
*c
,
133 body_callback_type body_callback
,
135 static int body_line(struct conn
*c
, char *line
);
136 static int command(struct conn
*c
, char *line
);
138 static const char *noyes
[] = { "no", "yes" };
140 /** @brief Remove a connection from the connection list */
141 static void remove_connection(struct conn
*c
) {
144 for(cc
= &connections
; *cc
&& *cc
!= c
; cc
= &(*cc
)->next
)
150 /** @brief Called when a connection's writer fails or is shut down
152 * If the connection still has a raeder that is cancelled.
154 static int writer_error(ev_source
attribute((unused
)) *ev
,
159 D(("server writer_error S%x %d", c
->tag
, errno_value
));
160 if(errno_value
== 0) {
162 D(("S%x writer completed", c
->tag
));
164 if(errno_value
!= EPIPE
)
165 error(errno_value
, "S%x write error on socket", c
->tag
);
167 D(("cancel reader"));
168 ev_reader_cancel(c
->r
);
171 D(("done cancel reader"));
175 remove_connection(c
);
179 /** @brief Called when a conncetion's reader fails or is shut down
181 * If connection still has a writer then it is closed.
183 static int reader_error(ev_source
attribute((unused
)) *ev
,
188 D(("server reader_error S%x %d", c
->tag
, errno_value
));
189 error(errno_value
, "S%x read error on socket", c
->tag
);
191 ev_writer_close(c
->w
);
195 remove_connection(c
);
199 static int c_disable(struct conn
*c
, char **vec
, int nvec
) {
201 disable_playing(c
->who
);
202 else if(nvec
== 1 && !strcmp(vec
[0], "now"))
203 disable_playing(c
->who
);
205 sink_writes(ev_writer_sink(c
->w
), "550 invalid argument\n");
206 return 1; /* completed */
208 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
209 return 1; /* completed */
212 static int c_enable(struct conn
*c
,
213 char attribute((unused
)) **vec
,
214 int attribute((unused
)) nvec
) {
215 enable_playing(c
->who
, c
->ev
);
216 /* Enable implicitly unpauses if there is nothing playing */
217 if(paused
&& !playing
) resume_playing(c
->who
);
218 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
219 return 1; /* completed */
222 static int c_enabled(struct conn
*c
,
223 char attribute((unused
)) **vec
,
224 int attribute((unused
)) nvec
) {
225 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[playing_is_enabled()]);
226 return 1; /* completed */
229 static int c_play(struct conn
*c
, char **vec
,
230 int attribute((unused
)) nvec
) {
232 struct queue_entry
*q
;
234 if(!trackdb_exists(vec
[0])) {
235 sink_writes(ev_writer_sink(c
->w
), "550 track is not in database\n");
238 if(!(track
= trackdb_resolve(vec
[0]))) {
239 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
242 q
= queue_add(track
, c
->who
, WHERE_BEFORE_RANDOM
);
244 /* If we added the first track, and something is playing, then prepare the
245 * new track. If nothing is playing then we don't bother as it wouldn't gain
247 if(q
== qhead
.next
&& playing
)
249 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", q
->id
);
250 /* If the queue was empty but we are for some reason paused then
252 if(!playing
) resume_playing(0);
254 return 1; /* completed */
257 static int c_remove(struct conn
*c
, char **vec
,
258 int attribute((unused
)) nvec
) {
259 struct queue_entry
*q
;
261 if(!(q
= queue_find(vec
[0]))) {
262 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
265 if(!right_removable(c
->rights
, c
->who
, q
)) {
266 error(0, "%s attempted remove but lacks required rights", c
->who
);
267 sink_writes(ev_writer_sink(c
->w
),
268 "510 Not authorized to remove that track\n");
271 queue_remove(q
, c
->who
);
272 /* De-prepare the track. */
274 /* See about adding a new random track */
275 add_random_track(c
->ev
);
276 /* Prepare whatever the next head track is. */
277 if(qhead
.next
!= &qhead
)
278 prepare(c
->ev
, qhead
.next
);
280 sink_writes(ev_writer_sink(c
->w
), "250 removed\n");
281 return 1; /* completed */
284 static int c_scratch(struct conn
*c
,
288 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
289 return 1; /* completed */
291 /* TODO there is a bug here: if we specify an ID but it's not the currently
292 * playing track then you will get 550 if you weren't authorized to scratch
293 * the currently playing track. */
294 if(!right_scratchable(c
->rights
, c
->who
, playing
)) {
295 error(0, "%s attempted scratch but lacks required rights", c
->who
);
296 sink_writes(ev_writer_sink(c
->w
),
297 "510 Not authorized to scratch that track\n");
300 scratch(c
->who
, nvec
== 1 ? vec
[0] : 0);
301 /* If you scratch an unpaused track then it is automatically unpaused */
303 sink_writes(ev_writer_sink(c
->w
), "250 scratched\n");
304 return 1; /* completed */
307 static int c_pause(struct conn
*c
,
308 char attribute((unused
)) **vec
,
309 int attribute((unused
)) nvec
) {
311 sink_writes(ev_writer_sink(c
->w
), "250 nothing is playing\n");
312 return 1; /* completed */
315 sink_writes(ev_writer_sink(c
->w
), "250 already paused\n");
316 return 1; /* completed */
318 if(pause_playing(c
->who
) < 0)
319 sink_writes(ev_writer_sink(c
->w
), "550 cannot pause this track\n");
321 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
325 static int c_resume(struct conn
*c
,
326 char attribute((unused
)) **vec
,
327 int attribute((unused
)) nvec
) {
329 sink_writes(ev_writer_sink(c
->w
), "250 not paused\n");
330 return 1; /* completed */
332 resume_playing(c
->who
);
333 sink_writes(ev_writer_sink(c
->w
), "250 paused\n");
337 static int c_shutdown(struct conn
*c
,
338 char attribute((unused
)) **vec
,
339 int attribute((unused
)) nvec
) {
340 info("S%x shut down by %s", c
->tag
, c
->who
);
341 sink_writes(ev_writer_sink(c
->w
), "250 shutting down\n");
342 ev_writer_flush(c
->w
);
346 static int c_reconfigure(struct conn
*c
,
347 char attribute((unused
)) **vec
,
348 int attribute((unused
)) nvec
) {
349 info("S%x reconfigure by %s", c
->tag
, c
->who
);
350 if(reconfigure(c
->ev
, 1))
351 sink_writes(ev_writer_sink(c
->w
), "550 error reading new config\n");
353 sink_writes(ev_writer_sink(c
->w
), "250 installed new config\n");
354 return 1; /* completed */
357 static void finished_rescan(void *ru
) {
358 struct conn
*const c
= ru
;
360 sink_writes(ev_writer_sink(c
->w
), "250 rescan completed\n");
361 /* Turn this connection back on */
362 ev_reader_enable(c
->r
);
365 static void start_fresh_rescan(void *ru
) {
366 struct conn
*const c
= ru
;
368 if(trackdb_rescan_underway()) {
369 /* Some other waiter beat us to it. However in this case we're happy to
370 * piggyback; the requirement is that a new rescan be started, not that it
371 * was _our_ rescan. */
373 /* We block until the rescan completes */
374 trackdb_add_rescanned(finished_rescan
, c
);
376 /* We report that the new rescan has started */
377 sink_writes(ev_writer_sink(c
->w
), "250 rescan initiated\n");
378 /* Turn this connection back on */
379 ev_reader_enable(c
->r
);
382 /* We are the first connection to get a callback so we must start a
385 /* We want to block until the new rescan completes */
386 trackdb_rescan(c
->ev
, 1/*check*/, finished_rescan
, c
);
388 /* We can report back immediately */
389 trackdb_rescan(c
->ev
, 1/*check*/, 0, 0);
390 sink_writes(ev_writer_sink(c
->w
), "250 rescan initiated\n");
391 /* Turn this connection back on */
392 ev_reader_enable(c
->r
);
397 static int c_rescan(struct conn
*c
,
400 int flag_wait
= 0, flag_fresh
= 0, n
;
403 for(n
= 0; n
< nvec
; ++n
) {
404 if(!strcmp(vec
[n
], "wait"))
405 flag_wait
= 1; /* wait for rescan to complete */
407 /* Currently disabled because untested (and hard to test). */
408 else if(!strcmp(vec
[n
], "fresh"))
409 flag_fresh
= 1; /* don't piggyback underway rescan */
412 sink_writes(ev_writer_sink(c
->w
), "550 unknown flag\n");
413 return 1; /* completed */
416 /* Report what was requested */
417 info("S%x rescan by %s (%s %s)", c
->tag
, c
->who
,
418 flag_wait ?
"wait" : "",
419 flag_fresh ?
"fresh" : "");
420 if(trackdb_rescan_underway()) {
422 /* We want a fresh rescan but there is already one underway. Arrange a
423 * callback when it completes and then set off a new one. */
424 c
->rescan_wait
= flag_wait
;
425 trackdb_add_rescanned(start_fresh_rescan
, c
);
429 sink_writes(ev_writer_sink(c
->w
), "250 rescan queued\n");
433 /* There's a rescan underway, and it's acceptable to piggyback on it */
435 /* We want to block until completion. */
436 trackdb_add_rescanned(finished_rescan
, c
);
439 /* We don't want to block. So we just report that things are in
441 sink_writes(ev_writer_sink(c
->w
), "250 rescan already underway\n");
446 /* No rescan is underway. fresh is therefore irrelevant. */
448 /* We want to block until completion */
449 trackdb_rescan(c
->ev
, 1/*check*/, finished_rescan
, c
);
452 /* We don't want to block. */
453 trackdb_rescan(c
->ev
, 1/*check*/, 0, 0);
454 sink_writes(ev_writer_sink(c
->w
), "250 rescan initiated\n");
455 return 1; /* completed */
460 static int c_version(struct conn
*c
,
461 char attribute((unused
)) **vec
,
462 int attribute((unused
)) nvec
) {
463 /* VERSION had better only use the basic character set */
464 sink_printf(ev_writer_sink(c
->w
), "251 %s\n", disorder_short_version_string
);
465 return 1; /* completed */
468 static int c_playing(struct conn
*c
,
469 char attribute((unused
)) **vec
,
470 int attribute((unused
)) nvec
) {
472 queue_fix_sofar(playing
);
473 playing
->expected
= 0;
474 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", queue_marshall(playing
));
476 sink_printf(ev_writer_sink(c
->w
), "259 nothing playing\n");
477 return 1; /* completed */
480 static const char *connection_host(struct conn
*c
) {
483 struct sockaddr_in in
;
484 struct sockaddr_in6 in6
;
490 /* get connection data */
492 if(getpeername(c
->fd
, &u
.sa
, &l
) < 0) {
493 error(errno
, "S%x error calling getpeername", c
->tag
);
496 if(c
->l
->pf
!= PF_UNIX
) {
497 if((n
= getnameinfo(&u
.sa
, l
,
498 host
, sizeof host
, 0, 0, NI_NUMERICHOST
))) {
499 error(0, "S%x error calling getnameinfo: %s", c
->tag
, gai_strerror(n
));
502 return xstrdup(host
);
507 static int c_user(struct conn
*c
,
509 int attribute((unused
)) nvec
) {
511 const char *res
, *host
, *password
;
515 sink_writes(ev_writer_sink(c
->w
), "530 already authenticated\n");
518 /* get connection data */
519 if(!(host
= connection_host(c
))) {
520 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
524 k
= trackdb_getuserinfo(vec
[0]);
525 /* reject nonexistent users */
527 error(0, "S%x unknown user '%s' from %s", c
->tag
, vec
[0], host
);
528 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
531 /* reject unconfirmed users */
532 if(kvp_get(k
, "confirmation")) {
533 error(0, "S%x unconfirmed user '%s' from %s", c
->tag
, vec
[0], host
);
534 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
537 password
= kvp_get(k
, "password");
538 if(!password
) password
= "";
539 if(parse_rights(kvp_get(k
, "rights"), &rights
, 1)) {
540 error(0, "error parsing rights for %s", vec
[0]);
541 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
544 /* check whether the response is right */
545 res
= authhash(c
->nonce
, sizeof c
->nonce
, password
,
546 config
->authorization_algorithm
);
547 if(wideopen
|| (res
&& !strcmp(res
, vec
[1]))) {
550 /* currently we only bother logging remote connections */
551 if(strcmp(host
, "local"))
552 info("S%x %s connected from %s", c
->tag
, vec
[0], host
);
554 c
->rights
|= RIGHT__LOCAL
;
555 sink_writes(ev_writer_sink(c
->w
), "230 OK\n");
558 /* oops, response was wrong */
559 info("S%x authentication failure for %s from %s", c
->tag
, vec
[0], host
);
560 sink_writes(ev_writer_sink(c
->w
), "530 authentication failed\n");
564 static int c_recent(struct conn
*c
,
565 char attribute((unused
)) **vec
,
566 int attribute((unused
)) nvec
) {
567 const struct queue_entry
*q
;
569 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
570 for(q
= phead
.next
; q
!= &phead
; q
= q
->next
)
571 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
572 sink_writes(ev_writer_sink(c
->w
), ".\n");
573 return 1; /* completed */
576 static int c_queue(struct conn
*c
,
577 char attribute((unused
)) **vec
,
578 int attribute((unused
)) nvec
) {
579 struct queue_entry
*q
;
584 sink_writes(ev_writer_sink(c
->w
), "253 Tracks follow\n");
585 if(playing_is_enabled() && !paused
) {
587 queue_fix_sofar(playing
);
588 if((l
= trackdb_get(playing
->track
, "_length"))
589 && (length
= atol(l
))) {
591 when
+= length
- playing
->sofar
+ config
->gap
;
594 /* Nothing is playing but playing is enabled, so whatever is
595 * first in the queue can be expected to start immediately. */
598 for(q
= qhead
.next
; q
!= &qhead
; q
= q
->next
) {
599 /* fill in estimated start time */
601 sink_printf(ev_writer_sink(c
->w
), " %s\n", queue_marshall(q
));
602 /* update for next track */
604 if((l
= trackdb_get(q
->track
, "_length"))
605 && (length
= atol(l
)))
606 when
+= length
+ config
->gap
;
611 sink_writes(ev_writer_sink(c
->w
), ".\n");
612 return 1; /* completed */
615 static int output_list(struct conn
*c
, char **vec
) {
617 sink_printf(ev_writer_sink(c
->w
), "%s\n", *vec
++);
618 sink_writes(ev_writer_sink(c
->w
), ".\n");
622 static int files_dirs(struct conn
*c
,
625 enum trackdb_listable what
) {
626 const char *dir
, *re
, *errstr
;
632 case 0: dir
= 0; re
= 0; break;
633 case 1: dir
= vec
[0]; re
= 0; break;
634 case 2: dir
= vec
[0]; re
= vec
[1]; break;
637 /* A bit of a bodge to make sure the args don't trample on cache keys */
638 if(dir
&& strchr(dir
, '\n')) {
639 sink_writes(ev_writer_sink(c
->w
), "550 invalid directory name\n");
642 if(re
&& strchr(re
, '\n')) {
643 sink_writes(ev_writer_sink(c
->w
), "550 invalid regexp\n");
646 /* We bother eliminating "" because the web interface is relatively
647 * likely to send it */
649 byte_xasprintf(&key
, "%d\n%s\n%s", (int)what
, dir ? dir
: "", re
);
650 fvec
= (char **)cache_get(&cache_files_type
, key
);
652 /* Got a cache hit, don't store the answer in the cache */
655 rec
= 0; /* quieten compiler */
657 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
659 if(!(rec
= pcre_compile(re
, PCRE_CASELESS
|PCRE_UTF8
,
660 &errstr
, &erroffset
, 0))) {
661 sink_printf(ev_writer_sink(c
->w
), "550 Error compiling regexp: %s\n",
665 /* It only counts as a miss if the regexp was valid. */
666 ++cache_files_misses
;
669 /* No regexp, don't bother caching the result */
675 /* No cache hit (either because a miss, or because we did not look) so do
678 fvec
= trackdb_list(dir
, 0, what
, rec
);
680 fvec
= trackdb_list(0, 0, what
, rec
);
683 /* Put the answer in the cache */
684 cache_put(&cache_files_type
, key
, fvec
);
685 sink_writes(ev_writer_sink(c
->w
), "253 Listing follow\n");
686 return output_list(c
, fvec
);
689 static int c_files(struct conn
*c
,
692 return files_dirs(c
, vec
, nvec
, trackdb_files
);
695 static int c_dirs(struct conn
*c
,
698 return files_dirs(c
, vec
, nvec
, trackdb_directories
);
701 static int c_allfiles(struct conn
*c
,
704 return files_dirs(c
, vec
, nvec
, trackdb_directories
|trackdb_files
);
707 static int c_get(struct conn
*c
,
709 int attribute((unused
)) nvec
) {
710 const char *v
, *track
;
712 if(!(track
= trackdb_resolve(vec
[0]))) {
713 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
716 if(vec
[1][0] != '_' && (v
= trackdb_get(track
, vec
[1])))
717 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(v
));
719 sink_writes(ev_writer_sink(c
->w
), "555 not found\n");
723 static int c_length(struct conn
*c
,
725 int attribute((unused
)) nvec
) {
726 const char *track
, *v
;
728 if(!(track
= trackdb_resolve(vec
[0]))) {
729 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
732 if((v
= trackdb_get(track
, "_length")))
733 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(v
));
735 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
739 static int c_set(struct conn
*c
,
741 int attribute((unused
)) nvec
) {
744 if(!(track
= trackdb_resolve(vec
[0]))) {
745 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
748 if(vec
[1][0] != '_' && !trackdb_set(track
, vec
[1], vec
[2]))
749 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
751 sink_writes(ev_writer_sink(c
->w
), "550 not found\n");
755 static int c_prefs(struct conn
*c
,
757 int attribute((unused
)) nvec
) {
761 if(!(track
= trackdb_resolve(vec
[0]))) {
762 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
765 k
= trackdb_get_all(track
);
766 sink_writes(ev_writer_sink(c
->w
), "253 prefs follow\n");
767 for(; k
; k
= k
->next
)
768 if(k
->name
[0] != '_') /* omit internal values */
769 sink_printf(ev_writer_sink(c
->w
),
770 " %s %s\n", quoteutf8(k
->name
), quoteutf8(k
->value
));
771 sink_writes(ev_writer_sink(c
->w
), ".\n");
775 static int c_exists(struct conn
*c
,
777 int attribute((unused
)) nvec
) {
778 /* trackdb_exists() does its own alias checking */
779 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[trackdb_exists(vec
[0])]);
783 static void search_parse_error(const char *msg
, void *u
) {
784 *(const char **)u
= msg
;
787 static int c_search(struct conn
*c
,
789 int attribute((unused
)) nvec
) {
790 char **terms
, **results
;
791 int nterms
, nresults
, n
;
792 const char *e
= "unknown error";
794 /* This is a bit of a bodge. Initially it's there to make the eclient
795 * interface a bit more convenient to add searching to, but it has the more
796 * compelling advantage that if everything uses it, then interpretation of
797 * user-supplied search strings will be the same everywhere. */
798 if(!(terms
= split(vec
[0], &nterms
, SPLIT_QUOTES
, search_parse_error
, &e
))) {
799 sink_printf(ev_writer_sink(c
->w
), "550 %s\n", e
);
801 results
= trackdb_search(terms
, nterms
, &nresults
);
802 sink_printf(ev_writer_sink(c
->w
), "253 %d matches\n", nresults
);
803 for(n
= 0; n
< nresults
; ++n
)
804 sink_printf(ev_writer_sink(c
->w
), "%s\n", results
[n
]);
805 sink_writes(ev_writer_sink(c
->w
), ".\n");
810 static int c_random_enable(struct conn
*c
,
811 char attribute((unused
)) **vec
,
812 int attribute((unused
)) nvec
) {
813 enable_random(c
->who
, c
->ev
);
814 /* Enable implicitly unpauses if there is nothing playing */
815 if(paused
&& !playing
) resume_playing(c
->who
);
816 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
817 return 1; /* completed */
820 static int c_random_disable(struct conn
*c
,
821 char attribute((unused
)) **vec
,
822 int attribute((unused
)) nvec
) {
823 disable_random(c
->who
);
824 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
825 return 1; /* completed */
828 static int c_random_enabled(struct conn
*c
,
829 char attribute((unused
)) **vec
,
830 int attribute((unused
)) nvec
) {
831 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", noyes
[random_is_enabled()]);
832 return 1; /* completed */
835 static void got_stats(char *stats
, void *u
) {
836 struct conn
*const c
= u
;
838 sink_printf(ev_writer_sink(c
->w
), "253 stats\n%s\n.\n", stats
);
839 /* Now we can start processing commands again */
840 ev_reader_enable(c
->r
);
843 static int c_stats(struct conn
*c
,
844 char attribute((unused
)) **vec
,
845 int attribute((unused
)) nvec
) {
846 trackdb_stats_subprocess(c
->ev
, got_stats
, c
);
847 return 0; /* not yet complete */
850 static int c_volume(struct conn
*c
,
862 l
= r
= atoi(vec
[0]);
873 rights
= set ? RIGHT_VOLUME
: RIGHT_READ
;
874 if(!(c
->rights
& rights
)) {
875 error(0, "%s attempted to set volume but lacks required rights", c
->who
);
876 sink_writes(ev_writer_sink(c
->w
), "510 Prohibited\n");
879 if(mixer_control(-1/*as configured*/, &l
, &r
, set
))
880 sink_writes(ev_writer_sink(c
->w
), "550 error accessing mixer\n");
882 sink_printf(ev_writer_sink(c
->w
), "252 %d %d\n", l
, r
);
883 if(l
!= volume_left
|| r
!= volume_right
) {
886 snprintf(lb
, sizeof lb
, "%d", l
);
887 snprintf(rb
, sizeof rb
, "%d", r
);
888 eventlog("volume", lb
, rb
, (char *)0);
894 /** @brief Called when data arrives on a log connection
896 * We just discard all such data. The client may occasionally send data as a
899 static int logging_reader_callback(ev_source
attribute((unused
)) *ev
,
901 void attribute((unused
)) *ptr
,
903 int attribute((unused
)) eof
,
904 void attribute((unused
)) *u
) {
907 ev_reader_consume(reader
, bytes
);
909 /* Oops, that's all for now */
910 D(("logging reader eof"));
913 ev_writer_close(c
->w
);
917 remove_connection(c
);
922 static void logclient(const char *msg
, void *user
) {
923 struct conn
*c
= user
;
926 /* This connection has gone up in smoke for some reason */
927 eventlog_remove(c
->lo
);
931 /* user_* messages are restricted */
932 if(!strncmp(msg
, "user_", 5)) {
933 /* They are only sent to admin users */
934 if(!(c
->rights
& RIGHT_ADMIN
))
936 /* They are not sent over TCP connections unless remote user-management is
938 if(!config
->remote_userman
&& !(c
->rights
& RIGHT__LOCAL
))
941 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" %s\n",
942 (uintmax_t)time(0), msg
);
945 static int c_log(struct conn
*c
,
946 char attribute((unused
)) **vec
,
947 int attribute((unused
)) nvec
) {
950 sink_writes(ev_writer_sink(c
->w
), "254 OK\n");
951 /* pump out initial state */
953 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
955 playing_is_enabled() ?
"enable_play" : "disable_play");
956 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
958 random_is_enabled() ?
"enable_random" : "disable_random");
959 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state %s\n",
961 paused ?
"pause" : "resume");
963 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" state playing\n",
966 sink_printf(ev_writer_sink(c
->w
), "%"PRIxMAX
" volume %d %d\n",
967 (uintmax_t)now
, volume_left
, volume_right
);
968 c
->lo
= xmalloc(sizeof *c
->lo
);
969 c
->lo
->fn
= logclient
;
972 c
->reader
= logging_reader_callback
;
976 /** @brief Test whether a move is allowed
977 * @param c Connection
978 * @param qs List of IDs on queue
979 * @param nqs Number of IDs
980 * @return 0 if move is prohibited, non-0 if it is allowed
982 static int has_move_rights(struct conn
*c
, struct queue_entry
**qs
, int nqs
) {
983 for(; nqs
> 0; ++qs
, --nqs
) {
984 struct queue_entry
*const q
= *qs
;
986 if(!right_movable(c
->rights
, c
->who
, q
))
992 static int c_move(struct conn
*c
,
994 int attribute((unused
)) nvec
) {
995 struct queue_entry
*q
;
998 if(!(q
= queue_find(vec
[0]))) {
999 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
1002 if(!has_move_rights(c
, &q
, 1)) {
1003 error(0, "%s attempted move but lacks required rights", c
->who
);
1004 sink_writes(ev_writer_sink(c
->w
),
1005 "510 Not authorized to move that track\n");
1008 n
= queue_move(q
, atoi(vec
[1]), c
->who
);
1009 sink_printf(ev_writer_sink(c
->w
), "252 %d\n", n
);
1010 /* If we've moved to the head of the queue then prepare the track. */
1016 static int c_moveafter(struct conn
*c
,
1018 int attribute((unused
)) nvec
) {
1019 struct queue_entry
*q
, **qs
;
1023 if(!(q
= queue_find(vec
[0]))) {
1024 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
1031 qs
= xcalloc(nvec
, sizeof *qs
);
1032 for(n
= 0; n
< nvec
; ++n
)
1033 if(!(qs
[n
] = queue_find(vec
[n
]))) {
1034 sink_writes(ev_writer_sink(c
->w
), "550 no such track on the queue\n");
1037 if(!has_move_rights(c
, qs
, nvec
)) {
1038 error(0, "%s attempted moveafter but lacks required rights", c
->who
);
1039 sink_writes(ev_writer_sink(c
->w
),
1040 "510 Not authorized to move those tracks\n");
1043 queue_moveafter(q
, nvec
, qs
, c
->who
);
1044 sink_printf(ev_writer_sink(c
->w
), "250 Moved tracks\n");
1045 /* If we've moved to the head of the queue then prepare the track. */
1051 static int c_part(struct conn
*c
,
1053 int attribute((unused
)) nvec
) {
1056 if(!(track
= trackdb_resolve(vec
[0]))) {
1057 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
1060 sink_printf(ev_writer_sink(c
->w
), "252 %s\n",
1061 quoteutf8(trackdb_getpart(track
, vec
[1], vec
[2])));
1065 static int c_resolve(struct conn
*c
,
1067 int attribute((unused
)) nvec
) {
1070 if(!(track
= trackdb_resolve(vec
[0]))) {
1071 sink_writes(ev_writer_sink(c
->w
), "550 cannot resolve track\n");
1074 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(track
));
1078 static int list_response(struct conn
*c
,
1081 sink_printf(ev_writer_sink(c
->w
), "253 %s\n", reply
);
1083 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
1084 **list
== '.' ?
"." : "", *list
);
1087 sink_writes(ev_writer_sink(c
->w
), ".\n");
1088 return 1; /* completed */
1091 static int c_tags(struct conn
*c
,
1092 char attribute((unused
)) **vec
,
1093 int attribute((unused
)) nvec
) {
1094 return list_response(c
, "Tag list follows", trackdb_alltags());
1097 static int c_set_global(struct conn
*c
,
1099 int attribute((unused
)) nvec
) {
1100 if(vec
[0][0] == '_') {
1101 sink_writes(ev_writer_sink(c
->w
), "550 cannot set internal global preferences\n");
1104 trackdb_set_global(vec
[0], vec
[1], c
->who
);
1105 sink_printf(ev_writer_sink(c
->w
), "250 OK\n");
1109 static int c_get_global(struct conn
*c
,
1111 int attribute((unused
)) nvec
) {
1112 const char *s
= trackdb_get_global(vec
[0]);
1115 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(s
));
1117 sink_writes(ev_writer_sink(c
->w
), "555 not found\n");
1121 static int c_nop(struct conn
*c
,
1122 char attribute((unused
)) **vec
,
1123 int attribute((unused
)) nvec
) {
1124 sink_printf(ev_writer_sink(c
->w
), "250 Quack\n");
1128 static int c_new(struct conn
*c
,
1138 if(max
<= 0 || max
> config
->new_max
)
1139 max
= config
->new_max
;
1140 tracks
= trackdb_new(0, max
);
1141 sink_printf(ev_writer_sink(c
->w
), "253 New track list follows\n");
1144 sink_printf(ev_writer_sink(c
->w
), "%s%s\n",
1145 **tracks
== '.' ?
"." : "", *tracks
);
1148 sink_writes(ev_writer_sink(c
->w
), ".\n");
1149 return 1; /* completed */
1153 static int c_rtp_address(struct conn
*c
,
1154 char attribute((unused
)) **vec
,
1155 int attribute((unused
)) nvec
) {
1156 if(config
->api
== BACKEND_NETWORK
) {
1157 sink_printf(ev_writer_sink(c
->w
), "252 %s %s\n",
1158 quoteutf8(config
->broadcast
.s
[0]),
1159 quoteutf8(config
->broadcast
.s
[1]));
1161 sink_writes(ev_writer_sink(c
->w
), "550 No RTP\n");
1165 static int c_cookie(struct conn
*c
,
1167 int attribute((unused
)) nvec
) {
1172 /* Can't log in twice on the same connection */
1174 sink_writes(ev_writer_sink(c
->w
), "530 already authenticated\n");
1177 /* Get some kind of peer identifcation */
1178 if(!(host
= connection_host(c
))) {
1179 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
1182 /* Check the cookie */
1183 user
= verify_cookie(vec
[0], &rights
);
1185 sink_writes(ev_writer_sink(c
->w
), "530 authentication failure\n");
1192 if(strcmp(host
, "local"))
1193 info("S%x %s connected with cookie from %s", c
->tag
, user
, host
);
1195 c
->rights
|= RIGHT__LOCAL
;
1196 /* Response contains username so client knows who they are acting as */
1197 sink_printf(ev_writer_sink(c
->w
), "232 %s\n", quoteutf8(user
));
1201 static int c_make_cookie(struct conn
*c
,
1202 char attribute((unused
)) **vec
,
1203 int attribute((unused
)) nvec
) {
1204 const char *cookie
= make_cookie(c
->who
);
1207 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(cookie
));
1209 sink_writes(ev_writer_sink(c
->w
), "550 Cannot create cookie\n");
1213 static int c_revoke(struct conn
*c
,
1214 char attribute((unused
)) **vec
,
1215 int attribute((unused
)) nvec
) {
1217 revoke_cookie(c
->cookie
);
1218 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1220 sink_writes(ev_writer_sink(c
->w
), "550 Did not log in with cookie\n");
1224 static int c_adduser(struct conn
*c
,
1229 if(!config
->remote_userman
&& !(c
->rights
& RIGHT__LOCAL
)) {
1230 error(0, "S%x: remote adduser", c
->tag
);
1231 sink_writes(ev_writer_sink(c
->w
), "550 Remote user management is disabled\n");
1236 if(parse_rights(vec
[2], 0, 1)) {
1237 sink_writes(ev_writer_sink(c
->w
), "550 Invalid rights list\n");
1241 rights
= config
->default_rights
;
1242 if(trackdb_adduser(vec
[0], vec
[1], rights
,
1243 0/*email*/, 0/*confirmation*/))
1244 sink_writes(ev_writer_sink(c
->w
), "550 Cannot create user\n");
1246 sink_writes(ev_writer_sink(c
->w
), "250 User created\n");
1250 static int c_deluser(struct conn
*c
,
1252 int attribute((unused
)) nvec
) {
1255 if(!config
->remote_userman
&& !(c
->rights
& RIGHT__LOCAL
)) {
1256 error(0, "S%x: remote deluser", c
->tag
);
1257 sink_writes(ev_writer_sink(c
->w
), "550 Remote user management is disabled\n");
1260 if(trackdb_deluser(vec
[0])) {
1261 sink_writes(ev_writer_sink(c
->w
), "550 Cannot delete user\n");
1264 /* Zap connections belonging to deleted user */
1265 for(d
= connections
; d
; d
= d
->next
)
1266 if(!strcmp(d
->who
, vec
[0]))
1268 sink_writes(ev_writer_sink(c
->w
), "250 User deleted\n");
1272 static int c_edituser(struct conn
*c
,
1274 int attribute((unused
)) nvec
) {
1277 if(!config
->remote_userman
&& !(c
->rights
& RIGHT__LOCAL
)) {
1278 error(0, "S%x: remote edituser", c
->tag
);
1279 sink_writes(ev_writer_sink(c
->w
), "550 Remote user management is disabled\n");
1282 /* RIGHT_ADMIN can do anything; otherwise you can only set your own email
1283 * address and password. */
1284 if((c
->rights
& RIGHT_ADMIN
)
1285 || (!strcmp(c
->who
, vec
[0])
1286 && (!strcmp(vec
[1], "email")
1287 || !strcmp(vec
[1], "password")))) {
1288 if(trackdb_edituserinfo(vec
[0], vec
[1], vec
[2])) {
1289 sink_writes(ev_writer_sink(c
->w
), "550 Failed to change setting\n");
1292 if(!strcmp(vec
[1], "password")) {
1293 /* Zap all connections for this user after a password change */
1294 for(d
= connections
; d
; d
= d
->next
)
1295 if(!strcmp(d
->who
, vec
[0]))
1297 } else if(!strcmp(vec
[1], "rights")) {
1298 /* Update rights for this user */
1301 if(!parse_rights(vec
[2], &r
, 1)) {
1302 const char *new_rights
= rights_string(r
);
1303 for(d
= connections
; d
; d
= d
->next
) {
1304 if(!strcmp(d
->who
, vec
[0])) {
1307 /* Notify any log connections */
1309 sink_printf(ev_writer_sink(d
->w
),
1310 "%"PRIxMAX
" rights_changed %s\n",
1312 quoteutf8(new_rights
));
1317 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1319 error(0, "%s attempted edituser but lacks required rights", c
->who
);
1320 sink_writes(ev_writer_sink(c
->w
), "510 Restricted to administrators\n");
1325 static int c_userinfo(struct conn
*c
,
1326 char attribute((unused
)) **vec
,
1327 int attribute((unused
)) nvec
) {
1331 /* We allow remote querying of rights so that clients can figure out what
1332 * they're allowed to do */
1333 if(!config
->remote_userman
1334 && !(c
->rights
& RIGHT__LOCAL
)
1335 && strcmp(vec
[1], "rights")) {
1336 error(0, "S%x: remote userinfo %s %s", c
->tag
, vec
[0], vec
[1]);
1337 sink_writes(ev_writer_sink(c
->w
), "550 Remote user management is disabled\n");
1340 /* RIGHT_ADMIN allows anything; otherwise you can only get your own email
1341 * address and rights list. */
1342 if((c
->rights
& RIGHT_ADMIN
)
1343 || (!strcmp(c
->who
, vec
[0])
1344 && (!strcmp(vec
[1], "email")
1345 || !strcmp(vec
[1], "rights")))) {
1346 if((k
= trackdb_getuserinfo(vec
[0])))
1347 if((value
= kvp_get(k
, vec
[1])))
1348 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(value
));
1350 sink_writes(ev_writer_sink(c
->w
), "555 Not set\n");
1352 sink_writes(ev_writer_sink(c
->w
), "550 No such user\n");
1354 error(0, "%s attempted userinfo but lacks required rights", c
->who
);
1355 sink_writes(ev_writer_sink(c
->w
), "510 Restricted to administrators\n");
1360 static int c_users(struct conn
*c
,
1361 char attribute((unused
)) **vec
,
1362 int attribute((unused
)) nvec
) {
1363 return list_response(c
, "User list follows", trackdb_listusers());
1366 /** @brief Base64 mapping table for confirmation strings
1368 * This is used with generic_to_base64() and generic_base64(). We cannot use
1369 * the MIME table as that contains '+' and '=' which get quoted when
1370 * URL-encoding. (The CGI still does the URL encoding but it is desirable to
1371 * avoid it being necessary.)
1373 static const char confirm_base64_table
[] =
1374 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789/.*";
1376 static int c_register(struct conn
*c
,
1378 int attribute((unused
)) nvec
) {
1383 /* The confirmation string is base64(username;nonce) */
1384 bufsize
= strlen(vec
[0]) + CONFIRM_SIZE
+ 2;
1385 buf
= xmalloc_noptr(bufsize
);
1386 offset
= byte_snprintf(buf
, bufsize
, "%s;", vec
[0]);
1387 gcry_randomize(buf
+ offset
, CONFIRM_SIZE
, GCRY_STRONG_RANDOM
);
1388 cs
= generic_to_base64((uint8_t *)buf
, offset
+ CONFIRM_SIZE
,
1389 confirm_base64_table
);
1390 if(trackdb_adduser(vec
[0], vec
[1], config
->default_rights
, vec
[2], cs
))
1391 sink_writes(ev_writer_sink(c
->w
), "550 Cannot create user\n");
1393 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(cs
));
1397 static int c_confirm(struct conn
*c
,
1399 int attribute((unused
)) nvec
) {
1405 /* Get some kind of peer identifcation */
1406 if(!(host
= connection_host(c
))) {
1407 sink_writes(ev_writer_sink(c
->w
), "530 Authentication failure\n");
1410 if(!(user
= generic_base64(vec
[0], &nuser
, confirm_base64_table
))
1411 || !(sep
= memchr(user
, ';', nuser
))) {
1412 sink_writes(ev_writer_sink(c
->w
), "550 Malformed confirmation string\n");
1416 if(trackdb_confirm(user
, vec
[0], &rights
))
1417 sink_writes(ev_writer_sink(c
->w
), "550 Incorrect confirmation string\n");
1422 if(strcmp(host
, "local"))
1423 info("S%x %s confirmed from %s", c
->tag
, user
, host
);
1425 c
->rights
|= RIGHT__LOCAL
;
1426 /* Response contains username so client knows who they are acting as */
1427 sink_printf(ev_writer_sink(c
->w
), "232 %s\n", quoteutf8(user
));
1432 static int sent_reminder(ev_source
attribute((unused
)) *ev
,
1433 pid_t
attribute((unused
)) pid
,
1435 const struct rusage
attribute((unused
)) *rusage
,
1437 struct conn
*const c
= u
;
1439 /* Tell the client what went down */
1441 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1443 error(0, "reminder subprocess %s", wstat(status
));
1444 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1446 /* Re-enable this connection */
1447 ev_reader_enable(c
->r
);
1451 static int c_reminder(struct conn
*c
,
1453 int attribute((unused
)) nvec
) {
1455 const char *password
, *email
, *text
, *encoding
, *charset
, *content_type
;
1460 static hash
*last_reminder
;
1462 if(!config
->mail_sender
) {
1463 error(0, "cannot send password reminders because mail_sender not set");
1464 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1467 if(!(k
= trackdb_getuserinfo(vec
[0]))) {
1468 error(0, "reminder for user '%s' who does not exist", vec
[0]);
1469 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1472 if(!(email
= kvp_get(k
, "email"))
1473 || !email_valid(email
)) {
1474 error(0, "user '%s' has no valid email address", vec
[0]);
1475 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1478 if(!(password
= kvp_get(k
, "password"))
1480 error(0, "user '%s' has no password", vec
[0]);
1481 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1484 /* Rate-limit reminders. This hash is bounded in size by the number of
1485 * users. If this is actually a problem for anyone then we can periodically
1488 last_reminder
= hash_new(sizeof (time_t));
1489 last
= hash_find(last_reminder
, vec
[0]);
1491 if(last
&& now
< *last
+ config
->reminder_interval
) {
1492 error(0, "sent a password reminder to '%s' too recently", vec
[0]);
1493 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1496 /* Send the reminder */
1497 /* TODO this should be templatized and to some extent merged with
1498 * the code in act_register() */
1499 byte_xasprintf((char **)&text
,
1500 "Someone requested that you be sent a reminder of your DisOrder password.\n"
1501 "Your password is:\n"
1504 if(!(text
= mime_encode_text(text
, &charset
, &encoding
)))
1505 fatal(0, "cannot encode email");
1506 byte_xasprintf((char **)&content_type
, "text/plain;charset=%s",
1507 quote822(charset
, 0));
1508 pid
= sendmail_subprocess("", config
->mail_sender
, email
,
1509 "DisOrder password reminder",
1510 encoding
, content_type
, text
);
1512 sink_writes(ev_writer_sink(c
->w
), "550 Cannot send a reminder email\n");
1515 hash_add(last_reminder
, vec
[0], &now
, HASH_INSERT_OR_REPLACE
);
1516 info("sending a passsword reminder to user '%s'", vec
[0]);
1517 /* We can only continue when the subprocess finishes */
1518 ev_child(c
->ev
, pid
, 0, sent_reminder
, c
);
1522 static int c_schedule_list(struct conn
*c
,
1523 char attribute((unused
)) **vec
,
1524 int attribute((unused
)) nvec
) {
1525 char **ids
= schedule_list(0);
1526 sink_writes(ev_writer_sink(c
->w
), "253 ID list follows\n");
1528 sink_printf(ev_writer_sink(c
->w
), "%s\n", *ids
++);
1529 sink_writes(ev_writer_sink(c
->w
), ".\n");
1530 return 1; /* completed */
1533 static int c_schedule_get(struct conn
*c
,
1535 int attribute((unused
)) nvec
) {
1536 struct kvp
*actiondata
= schedule_get(vec
[0]), *k
;
1539 sink_writes(ev_writer_sink(c
->w
), "555 No such event\n");
1540 return 1; /* completed */
1542 /* Scheduled events are public information. Anyone with RIGHT_READ can see
1544 sink_writes(ev_writer_sink(c
->w
), "253 Event information follows\n");
1545 for(k
= actiondata
; k
; k
= k
->next
)
1546 sink_printf(ev_writer_sink(c
->w
), " %s %s\n",
1547 quoteutf8(k
->name
), quoteutf8(k
->value
));
1548 sink_writes(ev_writer_sink(c
->w
), ".\n");
1549 return 1; /* completed */
1552 static int c_schedule_del(struct conn
*c
,
1554 int attribute((unused
)) nvec
) {
1555 struct kvp
*actiondata
= schedule_get(vec
[0]);
1558 sink_writes(ev_writer_sink(c
->w
), "555 No such event\n");
1559 return 1; /* completed */
1561 /* If you have admin rights you can delete anything. If you don't then you
1562 * can only delete your own scheduled events. */
1563 if(!(c
->rights
& RIGHT_ADMIN
)) {
1564 const char *who
= kvp_get(actiondata
, "who");
1566 if(!who
|| !c
->who
|| strcmp(who
, c
->who
)) {
1567 sink_writes(ev_writer_sink(c
->w
), "551 Not authorized\n");
1568 return 1; /* completed */
1571 if(schedule_del(vec
[0]))
1572 sink_writes(ev_writer_sink(c
->w
), "550 Could not delete scheduled event\n");
1574 sink_writes(ev_writer_sink(c
->w
), "250 Deleted\n");
1575 return 1; /* completed */
1578 static int c_schedule_add(struct conn
*c
,
1581 struct kvp
*actiondata
= 0;
1584 /* Standard fields */
1585 kvp_set(&actiondata
, "who", c
->who
);
1586 kvp_set(&actiondata
, "when", vec
[0]);
1587 kvp_set(&actiondata
, "priority", vec
[1]);
1588 kvp_set(&actiondata
, "action", vec
[2]);
1589 /* Action-dependent fields */
1590 if(!strcmp(vec
[2], "play")) {
1592 sink_writes(ev_writer_sink(c
->w
), "550 Wrong number of arguments\n");
1595 if(!trackdb_exists(vec
[3])) {
1596 sink_writes(ev_writer_sink(c
->w
), "550 Track is not in database\n");
1599 kvp_set(&actiondata
, "track", vec
[3]);
1600 } else if(!strcmp(vec
[2], "set-global")) {
1601 if(nvec
< 4 || nvec
> 5) {
1602 sink_writes(ev_writer_sink(c
->w
), "550 Wrong number of arguments\n");
1605 kvp_set(&actiondata
, "key", vec
[3]);
1607 kvp_set(&actiondata
, "value", vec
[4]);
1609 sink_writes(ev_writer_sink(c
->w
), "550 Unknown action\n");
1612 /* schedule_add() checks user rights */
1613 id
= schedule_add(c
->ev
, actiondata
);
1615 sink_writes(ev_writer_sink(c
->w
), "550 Cannot add scheduled event\n");
1617 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", id
);
1621 static int playlist_response(struct conn
*c
,
1625 assert(!"cannot cope with success");
1627 sink_writes(ev_writer_sink(c
->w
), "550 Access denied\n");
1630 sink_writes(ev_writer_sink(c
->w
), "550 Invalid playlist name\n");
1633 sink_writes(ev_writer_sink(c
->w
), "555 No such playlist\n");
1636 sink_writes(ev_writer_sink(c
->w
), "550 Error accessing playlist\n");
1642 static int c_playlist_get(struct conn
*c
,
1644 int attribute((unused
)) nvec
) {
1648 if(!(err
= trackdb_playlist_get(vec
[0], c
->who
, &tracks
, 0, 0)))
1649 return list_response(c
, "Playlist contents follows", tracks
);
1651 return playlist_response(c
, err
);
1654 static int c_playlist_set(struct conn
*c
,
1656 int attribute((unused
)) nvec
) {
1657 return fetch_body(c
, c_playlist_set_body
, vec
[0]);
1660 static int c_playlist_set_body(struct conn
*c
,
1664 const char *playlist
= u
;
1667 if(!c
->locked_playlist
1668 || strcmp(playlist
, c
->locked_playlist
)) {
1669 sink_writes(ev_writer_sink(c
->w
), "550 Playlist is not locked\n");
1672 if(!(err
= trackdb_playlist_set(playlist
, c
->who
,
1674 sink_printf(ev_writer_sink(c
->w
), "250 OK\n");
1677 return playlist_response(c
, err
);
1680 static int c_playlist_get_share(struct conn
*c
,
1682 int attribute((unused
)) nvec
) {
1686 if(!(err
= trackdb_playlist_get(vec
[0], c
->who
, 0, 0, &share
))) {
1687 sink_printf(ev_writer_sink(c
->w
), "252 %s\n", quoteutf8(share
));
1690 return playlist_response(c
, err
);
1693 static int c_playlist_set_share(struct conn
*c
,
1695 int attribute((unused
)) nvec
) {
1698 if(!(err
= trackdb_playlist_set(vec
[0], c
->who
, 0, 0, vec
[1]))) {
1699 sink_printf(ev_writer_sink(c
->w
), "250 OK\n");
1702 return playlist_response(c
, err
);
1705 static int c_playlists(struct conn
*c
,
1706 char attribute((unused
)) **vec
,
1707 int attribute((unused
)) nvec
) {
1710 trackdb_playlist_list(c
->who
, &p
, 0);
1711 return list_response(c
, "List of playlists follows", p
);
1714 static int c_playlist_delete(struct conn
*c
,
1716 int attribute((unused
)) nvec
) {
1719 if(!(err
= trackdb_playlist_delete(vec
[0], c
->who
))) {
1720 sink_writes(ev_writer_sink(c
->w
), "250 OK\n");
1723 return playlist_response(c
, err
);
1726 static int c_playlist_lock(struct conn
*c
,
1728 int attribute((unused
)) nvec
) {
1732 /* Check we're allowed to modify this playlist */
1733 if((err
= trackdb_playlist_set(vec
[0], c
->who
, 0, 0, 0)))
1734 return playlist_response(c
, err
);
1735 /* If we hold a lock don't allow a new one */
1736 if(c
->locked_playlist
) {
1737 sink_writes(ev_writer_sink(c
->w
), "550 Already holding a lock\n");
1740 /* See if some other connection locks the same playlist */
1741 for(cc
= connections
; cc
; cc
= cc
->next
)
1742 if(cc
->locked_playlist
&& !strcmp(cc
->locked_playlist
, vec
[0]))
1745 /* TODO: implement config->playlist_lock_timeout */
1746 sink_writes(ev_writer_sink(c
->w
), "550 Already locked\n");
1749 c
->locked_playlist
= xstrdup(vec
[0]);
1750 time(&c
->locked_when
);
1751 sink_writes(ev_writer_sink(c
->w
), "250 Acquired lock\n");
1755 static int c_playlist_unlock(struct conn
*c
,
1756 char attribute((unused
)) **vec
,
1757 int attribute((unused
)) nvec
) {
1758 if(!c
->locked_playlist
) {
1759 sink_writes(ev_writer_sink(c
->w
), "550 Not holding a lock\n");
1762 c
->locked_playlist
= 0;
1763 sink_writes(ev_writer_sink(c
->w
), "250 Released lock\n");
1767 static const struct command
{
1768 /** @brief Command name */
1771 /** @brief Minimum number of arguments */
1774 /** @brief Maximum number of arguments */
1777 /** @brief Function to process command */
1778 int (*fn
)(struct conn
*, char **, int);
1780 /** @brief Rights required to execute command
1782 * 0 means that the command can be issued without logging in. If multiple
1783 * bits are listed here any of those rights will do.
1787 { "adduser", 2, 3, c_adduser
, RIGHT_ADMIN
|RIGHT__LOCAL
},
1788 { "allfiles", 0, 2, c_allfiles
, RIGHT_READ
},
1789 { "confirm", 1, 1, c_confirm
, 0 },
1790 { "cookie", 1, 1, c_cookie
, 0 },
1791 { "deluser", 1, 1, c_deluser
, RIGHT_ADMIN
|RIGHT__LOCAL
},
1792 { "dirs", 0, 2, c_dirs
, RIGHT_READ
},
1793 { "disable", 0, 1, c_disable
, RIGHT_GLOBAL_PREFS
},
1794 { "edituser", 3, 3, c_edituser
, RIGHT_ADMIN
|RIGHT_USERINFO
},
1795 { "enable", 0, 0, c_enable
, RIGHT_GLOBAL_PREFS
},
1796 { "enabled", 0, 0, c_enabled
, RIGHT_READ
},
1797 { "exists", 1, 1, c_exists
, RIGHT_READ
},
1798 { "files", 0, 2, c_files
, RIGHT_READ
},
1799 { "get", 2, 2, c_get
, RIGHT_READ
},
1800 { "get-global", 1, 1, c_get_global
, RIGHT_READ
},
1801 { "length", 1, 1, c_length
, RIGHT_READ
},
1802 { "log", 0, 0, c_log
, RIGHT_READ
},
1803 { "make-cookie", 0, 0, c_make_cookie
, RIGHT_READ
},
1804 { "move", 2, 2, c_move
, RIGHT_MOVE__MASK
},
1805 { "moveafter", 1, INT_MAX
, c_moveafter
, RIGHT_MOVE__MASK
},
1806 { "new", 0, 1, c_new
, RIGHT_READ
},
1807 { "nop", 0, 0, c_nop
, 0 },
1808 { "part", 3, 3, c_part
, RIGHT_READ
},
1809 { "pause", 0, 0, c_pause
, RIGHT_PAUSE
},
1810 { "play", 1, 1, c_play
, RIGHT_PLAY
},
1811 { "playing", 0, 0, c_playing
, RIGHT_READ
},
1812 { "playlist-delete", 1, 1, c_playlist_delete
, RIGHT_PLAY
},
1813 { "playlist-get", 1, 1, c_playlist_get
, RIGHT_READ
},
1814 { "playlist-get-share", 1, 1, c_playlist_get_share
, RIGHT_READ
},
1815 { "playlist-lock", 1, 1, c_playlist_lock
, RIGHT_PLAY
},
1816 { "playlist-set", 1, 1, c_playlist_set
, RIGHT_PLAY
},
1817 { "playlist-set-share", 2, 2, c_playlist_set_share
, RIGHT_PLAY
},
1818 { "playlist-unlock", 0, 0, c_playlist_unlock
, RIGHT_PLAY
},
1819 { "playlists", 0, 0, c_playlists
, RIGHT_READ
},
1820 { "prefs", 1, 1, c_prefs
, RIGHT_READ
},
1821 { "queue", 0, 0, c_queue
, RIGHT_READ
},
1822 { "random-disable", 0, 0, c_random_disable
, RIGHT_GLOBAL_PREFS
},
1823 { "random-enable", 0, 0, c_random_enable
, RIGHT_GLOBAL_PREFS
},
1824 { "random-enabled", 0, 0, c_random_enabled
, RIGHT_READ
},
1825 { "recent", 0, 0, c_recent
, RIGHT_READ
},
1826 { "reconfigure", 0, 0, c_reconfigure
, RIGHT_ADMIN
},
1827 { "register", 3, 3, c_register
, RIGHT_REGISTER
|RIGHT__LOCAL
},
1828 { "reminder", 1, 1, c_reminder
, RIGHT__LOCAL
},
1829 { "remove", 1, 1, c_remove
, RIGHT_REMOVE__MASK
},
1830 { "rescan", 0, INT_MAX
, c_rescan
, RIGHT_RESCAN
},
1831 { "resolve", 1, 1, c_resolve
, RIGHT_READ
},
1832 { "resume", 0, 0, c_resume
, RIGHT_PAUSE
},
1833 { "revoke", 0, 0, c_revoke
, RIGHT_READ
},
1834 { "rtp-address", 0, 0, c_rtp_address
, 0 },
1835 { "schedule-add", 3, INT_MAX
, c_schedule_add
, RIGHT_READ
},
1836 { "schedule-del", 1, 1, c_schedule_del
, RIGHT_READ
},
1837 { "schedule-get", 1, 1, c_schedule_get
, RIGHT_READ
},
1838 { "schedule-list", 0, 0, c_schedule_list
, RIGHT_READ
},
1839 { "scratch", 0, 1, c_scratch
, RIGHT_SCRATCH__MASK
},
1840 { "search", 1, 1, c_search
, RIGHT_READ
},
1841 { "set", 3, 3, c_set
, RIGHT_PREFS
, },
1842 { "set-global", 2, 2, c_set_global
, RIGHT_GLOBAL_PREFS
},
1843 { "shutdown", 0, 0, c_shutdown
, RIGHT_ADMIN
},
1844 { "stats", 0, 0, c_stats
, RIGHT_READ
},
1845 { "tags", 0, 0, c_tags
, RIGHT_READ
},
1846 { "unset", 2, 2, c_set
, RIGHT_PREFS
},
1847 { "unset-global", 1, 1, c_set_global
, RIGHT_GLOBAL_PREFS
},
1848 { "user", 2, 2, c_user
, 0 },
1849 { "userinfo", 2, 2, c_userinfo
, RIGHT_READ
},
1850 { "users", 0, 0, c_users
, RIGHT_READ
},
1851 { "version", 0, 0, c_version
, RIGHT_READ
},
1852 { "volume", 0, 2, c_volume
, RIGHT_READ
|RIGHT_VOLUME
}
1855 /** @brief Fetch a command body
1856 * @param c Connection
1857 * @param body_callback Called with body
1858 * @param u Passed to body_callback
1861 static int fetch_body(struct conn
*c
,
1862 body_callback_type body_callback
,
1864 assert(c
->line_reader
== command
);
1865 c
->line_reader
= body_line
;
1866 c
->body_callback
= body_callback
;
1868 vector_init(c
->body
);
1872 /** @brief @ref line_reader_type callback for command body lines
1873 * @param c Connection
1875 * @return 1 if complete, 0 if incomplete
1877 * Called from reader_callback().
1879 static int body_line(struct conn
*c
,
1884 /* That's the lot */
1885 c
->line_reader
= command
;
1886 vector_terminate(c
->body
);
1887 return c
->body_callback(c
, c
->body
->vec
, c
->body
->nvec
, c
->body_u
);
1890 vector_append(c
->body
, xstrdup(line
));
1891 return 1; /* completed */
1894 static void command_error(const char *msg
, void *u
) {
1897 sink_printf(ev_writer_sink(c
->w
), "500 parse error: %s\n", msg
);
1900 /** @brief @ref line_reader_type callback for commands
1901 * @param c Connection
1903 * @return 1 if complete, 0 if incomplete
1905 * Called from reader_callback().
1907 static int command(struct conn
*c
, char *line
) {
1911 D(("server command %s", line
));
1912 /* We force everything into NFC as early as possible */
1913 if(!(line
= utf8_compose_canon(line
, strlen(line
), 0))) {
1914 sink_writes(ev_writer_sink(c
->w
), "500 cannot normalize command\n");
1917 if(!(vec
= split(line
, &nvec
, SPLIT_QUOTES
, command_error
, c
))) {
1918 sink_writes(ev_writer_sink(c
->w
), "500 cannot parse command\n");
1922 sink_writes(ev_writer_sink(c
->w
), "500 do what?\n");
1925 if((n
= TABLE_FIND(commands
, name
, vec
[0])) < 0)
1926 sink_writes(ev_writer_sink(c
->w
), "500 unknown command\n");
1928 if(commands
[n
].rights
1929 && !(c
->rights
& commands
[n
].rights
)) {
1930 error(0, "%s attempted %s but lacks required rights", c
->who ? c
->who
: "NULL",
1932 sink_writes(ev_writer_sink(c
->w
), "510 Prohibited\n");
1937 if(nvec
< commands
[n
].minargs
) {
1938 sink_writes(ev_writer_sink(c
->w
), "500 missing argument(s)\n");
1941 if(nvec
> commands
[n
].maxargs
) {
1942 sink_writes(ev_writer_sink(c
->w
), "500 too many arguments\n");
1945 return commands
[n
].fn(c
, vec
, nvec
);
1947 return 1; /* completed */
1950 /* redirect to the right reader callback for our current state */
1951 static int redirect_reader_callback(ev_source
*ev
,
1959 return c
->reader(ev
, reader
, ptr
, bytes
, eof
, u
);
1962 /* the main command reader */
1963 static int reader_callback(ev_source
attribute((unused
)) *ev
,
1973 D(("server reader_callback"));
1974 while((eol
= memchr(ptr
, '\n', bytes
))) {
1976 ev_reader_consume(reader
, eol
- (char *)ptr
);
1977 complete
= c
->line_reader(c
, ptr
); /* usually command() */
1978 bytes
-= (eol
- (char *)ptr
);
1981 /* the command had better have set a new reader callback */
1983 /* there are further bytes to read, or we are at eof; arrange for the
1984 * command's reader callback to handle them */
1985 return ev_reader_incomplete(reader
);
1986 /* nothing's going on right now */
1989 /* command completed, we can go around and handle the next one */
1993 error(0, "S%x unterminated line", c
->tag
);
1994 D(("normal reader close"));
1997 D(("close associated writer"));
1998 ev_writer_close(c
->w
);
2001 remove_connection(c
);
2006 static int listen_callback(ev_source
*ev
,
2008 const struct sockaddr
attribute((unused
)) *remote
,
2009 socklen_t
attribute((unused
)) rlen
,
2011 const struct listener
*l
= u
;
2012 struct conn
*c
= xmalloc(sizeof *c
);
2013 static unsigned tags
;
2015 D(("server listen_callback fd %d (%s)", fd
, l
->name
));
2018 c
->next
= connections
;
2021 c
->w
= ev_writer_new(ev
, fd
, writer_error
, c
,
2023 c
->r
= ev_reader_new(ev
, fd
, redirect_reader_callback
, reader_error
, c
,
2027 c
->reader
= reader_callback
;
2030 c
->line_reader
= command
;
2032 gcry_randomize(c
->nonce
, sizeof c
->nonce
, GCRY_STRONG_RANDOM
);
2033 sink_printf(ev_writer_sink(c
->w
), "231 %d %s %s\n",
2035 config
->authorization_algorithm
,
2036 hex(c
->nonce
, sizeof c
->nonce
));
2040 int server_start(ev_source
*ev
, int pf
,
2041 size_t socklen
, const struct sockaddr
*sa
,
2044 struct listener
*l
= xmalloc(sizeof *l
);
2045 static const int one
= 1;
2047 D(("server_init socket %s", name
));
2048 fd
= xsocket(pf
, SOCK_STREAM
, 0);
2049 xsetsockopt(fd
, SOL_SOCKET
, SO_REUSEADDR
, &one
, sizeof one
);
2050 if(bind(fd
, sa
, socklen
) < 0) {
2051 error(errno
, "error binding to %s", name
);
2059 if(ev_listen(ev
, fd
, listen_callback
, l
, "server listener"))
2064 int server_stop(ev_source
*ev
, int fd
) {
2066 return ev_listen_cancel(ev
, fd
);