2 * This file is part of DisOrder.
3 * Copyright (C) 2004-2012 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"
23 # define NONCE_SIZE 16
27 /** @brief Size of nonce in confirmation string in 32-bit words
29 * 64 bits gives 11 digits (in base 62).
31 # define CONFIRM_SIZE 2
34 int volume_left, volume_right; /* last known volume */
36 /** @brief Accept all well-formed login attempts
50 /** @brief Signature for line reader callback
53 * @return 0 if incomplete, 1 if complete
55 * @p line is 0-terminated and excludes the newline. It points into the
56 * input buffer so will become invalid shortly.
58 typedef int line_reader_type(struct conn *c,
61 /** @brief Signature for with-body command callbacks
63 * @param body List of body lines
64 * @param nbody Number of body lines
65 * @param u As passed to fetch_body()
66 * @return 0 to suspend input, 1 if complete
68 * The body strings are allocated (so survive indefinitely) and don't include
71 typedef int body_callback_type(struct conn *c,
76 /** @brief One client connection */
78 /** @brief Read commands from here */
80 /** @brief Send responses to here */
82 /** @brief Underlying file descriptor */
84 /** @brief Unique identifier for connection used in log messages */
86 /** @brief Login name or NULL */
88 /** @brief Event loop */
90 /** @brief Nonce chosen for this connection */
91 unsigned char nonce[NONCE_SIZE];
92 /** @brief Current reader callback
94 * We change this depending on whether we're servicing the @b log command
96 ev_reader_callback *reader;
97 /** @brief Event log output sending to this connection */
98 struct eventlog_output *lo;
99 /** @brief Parent listener */
100 const struct listener *l;
101 /** @brief Login cookie or NULL */
103 /** @brief Connection rights */
105 /** @brief Next connection */
107 /** @brief True if pending rescan had 'wait' set */
109 /** @brief Playlist that this connection locks */
110 const char *locked_playlist;
111 /** @brief When that playlist was locked */
113 /** @brief Line reader function */
114 line_reader_type *line_reader;
115 /** @brief Called when command body has been read */
116 body_callback_type *body_callback;
117 /** @brief Passed to @c body_callback */
119 /** @brief Accumulating body */
120 struct vector body[1];
122 /** @brief Nonzero if an active RTP request exists */
125 /** @brief RTP destination (if @ref rtp_requested is nonzero) */
126 struct sockaddr_storage rtp_destination;
129 /** @brief Linked list of connections */
130 static struct conn *connections;
132 static int reader_callback(ev_source *ev,
138 static int c_playlist_set_body(struct conn *c,
142 static int fetch_body(struct conn *c,
143 body_callback_type body_callback,
145 static int body_line(struct conn *c, char *line);
146 static int command(struct conn *c, char *line);
148 static const char *noyes[] = { "no", "yes" };
150 /** @brief Remove a connection from the connection list
152 * This is a good place for cleaning things up when connections are closed for
155 static void remove_connection(struct conn *c) {
158 if(c->rtp_requested) {
159 rtp_request_cancel(&c->rtp_destination);
160 c->rtp_requested = 0;
162 for(cc = &connections; *cc && *cc != c; cc = &(*cc)->next)
168 /** @brief Called when a connection's writer fails or is shut down
170 * If the connection still has a raeder that is cancelled.
172 static int writer_error(ev_source attribute((unused)) *ev,
177 D(("server writer_error S%x %d", c->tag, errno_value));
178 if(errno_value == 0) {
180 D(("S%x writer completed", c->tag));
182 if(errno_value != EPIPE)
183 disorder_error(errno_value, "S%x write error on socket", c->tag);
185 D(("cancel reader"));
186 ev_reader_cancel(c->r);
189 D(("done cancel reader"));
193 remove_connection(c);
197 /** @brief Called when a conncetion's reader fails or is shut down
199 * If connection still has a writer then it is closed.
201 static int reader_error(ev_source attribute((unused)) *ev,
206 D(("server reader_error S%x %d", c->tag, errno_value));
207 disorder_error(errno_value, "S%x read error on socket", c->tag);
209 ev_writer_close(c->w);
213 remove_connection(c);
217 static int c_disable(struct conn *c, char **vec, int nvec) {
219 disable_playing(c->who, c->ev);
220 else if(nvec == 1 && !strcmp(vec[0], "now"))
221 disable_playing(c->who, c->ev);
223 sink_writes(ev_writer_sink(c->w), "550 invalid argument\n");
224 return 1; /* completed */
226 sink_writes(ev_writer_sink(c->w), "250 OK\n");
227 return 1; /* completed */
230 static int c_enable(struct conn *c,
231 char attribute((unused)) **vec,
232 int attribute((unused)) nvec) {
233 enable_playing(c->who, c->ev);
234 /* Enable implicitly unpauses if there is nothing playing */
235 if(paused && !playing) resume_playing(c->who);
236 sink_writes(ev_writer_sink(c->w), "250 OK\n");
237 return 1; /* completed */
240 static int c_enabled(struct conn *c,
241 char attribute((unused)) **vec,
242 int attribute((unused)) nvec) {
243 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[playing_is_enabled()]);
244 return 1; /* completed */
247 static int c_play(struct conn *c, char **vec,
248 int attribute((unused)) nvec) {
250 struct queue_entry *q;
252 if(!trackdb_exists(vec[0])) {
253 sink_writes(ev_writer_sink(c->w), "550 track is not in database\n");
256 if(!(track = trackdb_resolve(vec[0]))) {
257 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
260 q = queue_add(track, c->who, WHERE_BEFORE_RANDOM, NULL, origin_picked);
262 sink_printf(ev_writer_sink(c->w), "252 %s\n", q->id);
263 /* We make sure the track at the head of the queue is prepared, just in case
264 * we added it. We could be more subtle but prepare() will ensure we don't
265 * prepare the same track twice so there's no point. */
266 if(qhead.next != &qhead)
267 prepare(c->ev, qhead.next);
268 /* If the queue was empty but we are for some reason paused then
270 if(!playing) resume_playing(0);
272 return 1; /* completed */
275 static int c_playafter(struct conn *c, char **vec,
276 int attribute((unused)) nvec) {
278 struct queue_entry *q;
279 const char *afterme = vec[0];
281 for(int n = 1; n < nvec; ++n) {
282 if(!trackdb_exists(vec[n])) {
283 sink_writes(ev_writer_sink(c->w), "550 track is not in database\n");
286 if(!(track = trackdb_resolve(vec[n]))) {
287 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
290 q = queue_add(track, c->who, WHERE_AFTER, afterme, origin_picked);
292 sink_printf(ev_writer_sink(c->w), "550 No such ID\n");
295 disorder_info("added %s as %s after %s", track, q->id, afterme);
299 sink_printf(ev_writer_sink(c->w), "252 OK\n");
300 /* We make sure the track at the head of the queue is prepared, just in case
301 * we added it. We could be more subtle but prepare() will ensure we don't
302 * prepare the same track twice so there's no point. */
303 if(qhead.next != &qhead) {
304 prepare(c->ev, qhead.next);
305 disorder_info("prepared %s", qhead.next->id);
307 /* If the queue was empty but we are for some reason paused then
312 return 1; /* completed */
315 static int c_remove(struct conn *c, char **vec,
316 int attribute((unused)) nvec) {
317 struct queue_entry *q;
319 if(!(q = queue_find(vec[0]))) {
320 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
323 if(!right_removable(c->rights, c->who, q)) {
324 disorder_error(0, "%s attempted remove but lacks required rights", c->who);
325 sink_writes(ev_writer_sink(c->w),
326 "510 Not authorized to remove that track\n");
329 queue_remove(q, c->who);
330 /* De-prepare the track. */
332 /* See about adding a new random track */
333 add_random_track(c->ev);
334 /* Prepare whatever the next head track is. */
335 if(qhead.next != &qhead)
336 prepare(c->ev, qhead.next);
338 sink_writes(ev_writer_sink(c->w), "250 removed\n");
339 return 1; /* completed */
342 static int c_scratch(struct conn *c,
346 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
347 return 1; /* completed */
349 /* TODO there is a bug here: if we specify an ID but it's not the currently
350 * playing track then you will get 550 if you weren't authorized to scratch
351 * the currently playing track. */
352 if(!right_scratchable(c->rights, c->who, playing)) {
353 disorder_error(0, "%s attempted scratch but lacks required rights", c->who);
354 sink_writes(ev_writer_sink(c->w),
355 "510 Not authorized to scratch that track\n");
358 scratch(c->who, nvec == 1 ? vec[0] : 0);
359 /* If you scratch an unpaused track then it is automatically unpaused */
361 sink_writes(ev_writer_sink(c->w), "250 scratched\n");
362 return 1; /* completed */
365 static int c_pause(struct conn *c,
366 char attribute((unused)) **vec,
367 int attribute((unused)) nvec) {
369 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
370 return 1; /* completed */
373 sink_writes(ev_writer_sink(c->w), "250 already paused\n");
374 return 1; /* completed */
376 if(pause_playing(c->who) < 0)
377 sink_writes(ev_writer_sink(c->w), "550 cannot pause this track\n");
379 sink_writes(ev_writer_sink(c->w), "250 paused\n");
383 static int c_resume(struct conn *c,
384 char attribute((unused)) **vec,
385 int attribute((unused)) nvec) {
387 sink_writes(ev_writer_sink(c->w), "250 not paused\n");
388 return 1; /* completed */
390 resume_playing(c->who);
391 sink_writes(ev_writer_sink(c->w), "250 paused\n");
395 static int c_shutdown(struct conn *c,
396 char attribute((unused)) **vec,
397 int attribute((unused)) nvec) {
398 disorder_info("S%x shut down by %s", c->tag, c->who);
399 sink_writes(ev_writer_sink(c->w), "250 shutting down\n");
400 ev_writer_flush(c->w);
404 static int c_reconfigure(struct conn *c,
405 char attribute((unused)) **vec,
406 int attribute((unused)) nvec) {
407 disorder_info("S%x reconfigure by %s", c->tag, c->who);
408 if(reconfigure(c->ev, 1))
409 sink_writes(ev_writer_sink(c->w), "550 error reading new config\n");
411 sink_writes(ev_writer_sink(c->w), "250 installed new config\n");
412 return 1; /* completed */
415 static void finished_rescan(void *ru) {
416 struct conn *const c = ru;
418 sink_writes(ev_writer_sink(c->w), "250 rescan completed\n");
419 /* Turn this connection back on */
420 ev_reader_enable(c->r);
423 static void start_fresh_rescan(void *ru) {
424 struct conn *const c = ru;
426 if(trackdb_rescan_underway()) {
427 /* Some other waiter beat us to it. However in this case we're happy to
428 * piggyback; the requirement is that a new rescan be started, not that it
429 * was _our_ rescan. */
431 /* We block until the rescan completes */
432 trackdb_add_rescanned(finished_rescan, c);
434 /* We report that the new rescan has started */
435 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
436 /* Turn this connection back on */
437 ev_reader_enable(c->r);
440 /* We are the first connection to get a callback so we must start a
443 /* We want to block until the new rescan completes */
444 trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c);
446 /* We can report back immediately */
447 trackdb_rescan(c->ev, 1/*check*/, 0, 0);
448 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
449 /* Turn this connection back on */
450 ev_reader_enable(c->r);
455 static int c_rescan(struct conn *c,
458 int flag_wait = 0, flag_fresh = 0, n;
461 for(n = 0; n < nvec; ++n) {
462 if(!strcmp(vec[n], "wait"))
463 flag_wait = 1; /* wait for rescan to complete */
465 /* Currently disabled because untested (and hard to test). */
466 else if(!strcmp(vec[n], "fresh"))
467 flag_fresh = 1; /* don't piggyback underway rescan */
470 sink_writes(ev_writer_sink(c->w), "550 unknown flag\n");
471 return 1; /* completed */
474 /* Report what was requested */
475 disorder_info("S%x rescan by %s (%s %s)", c->tag, c->who,
476 flag_wait ? "wait" : "",
477 flag_fresh ? "fresh" : "");
478 if(trackdb_rescan_underway()) {
480 /* We want a fresh rescan but there is already one underway. Arrange a
481 * callback when it completes and then set off a new one. */
482 c->rescan_wait = flag_wait;
483 trackdb_add_rescanned(start_fresh_rescan, c);
487 sink_writes(ev_writer_sink(c->w), "250 rescan queued\n");
491 /* There's a rescan underway, and it's acceptable to piggyback on it */
493 /* We want to block until completion. */
494 trackdb_add_rescanned(finished_rescan, c);
497 /* We don't want to block. So we just report that things are in
499 sink_writes(ev_writer_sink(c->w), "250 rescan already underway\n");
504 /* No rescan is underway. fresh is therefore irrelevant. */
506 /* We want to block until completion */
507 trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c);
510 /* We don't want to block. */
511 trackdb_rescan(c->ev, 1/*check*/, 0, 0);
512 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
513 return 1; /* completed */
518 static int c_version(struct conn *c,
519 char attribute((unused)) **vec,
520 int attribute((unused)) nvec) {
521 /* VERSION had better only use the basic character set */
522 sink_printf(ev_writer_sink(c->w), "251 %s\n", disorder_short_version_string);
523 return 1; /* completed */
526 static int c_playing(struct conn *c,
527 char attribute((unused)) **vec,
528 int attribute((unused)) nvec) {
530 queue_fix_sofar(playing);
531 playing->expected = 0;
532 sink_printf(ev_writer_sink(c->w), "252 %s\n", queue_marshall(playing));
534 sink_printf(ev_writer_sink(c->w), "259 nothing playing\n");
535 return 1; /* completed */
538 static const char *connection_host(struct conn *c) {
541 struct sockaddr_in in;
542 struct sockaddr_in6 in6;
548 /* get connection data */
550 if(getpeername(c->fd, &u.sa, &l) < 0) {
551 disorder_error(errno, "S%x error calling getpeername", c->tag);
554 if(c->l->pf != PF_UNIX) {
555 if((n = getnameinfo(&u.sa, l,
556 host, sizeof host, 0, 0, NI_NUMERICHOST))) {
557 disorder_error(0, "S%x error calling getnameinfo: %s",
558 c->tag, gai_strerror(n));
561 return xstrdup(host);
566 static int c_user(struct conn *c,
568 int attribute((unused)) nvec) {
570 const char *res, *host, *password;
574 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
577 /* get connection data */
578 if(!(host = connection_host(c))) {
579 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
583 k = trackdb_getuserinfo(vec[0]);
584 /* reject nonexistent users */
586 disorder_error(0, "S%x unknown user '%s' from %s", c->tag, vec[0], host);
587 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
590 /* reject unconfirmed users */
591 if(kvp_get(k, "confirmation")) {
592 disorder_error(0, "S%x unconfirmed user '%s' from %s",
593 c->tag, vec[0], host);
594 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
597 password = kvp_get(k, "password");
598 if(!password) password = "";
599 if(parse_rights(kvp_get(k, "rights"), &rights, 1)) {
600 disorder_error(0, "error parsing rights for %s", vec[0]);
601 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
604 /* check whether the response is right */
605 res = authhash(c->nonce, sizeof c->nonce, password,
606 config->authorization_algorithm);
607 if(wideopen || c->l->privileged || (res && !strcmp(res, vec[1]))) {
610 /* currently we only bother logging remote connections */
611 if(strcmp(host, "local"))
612 disorder_info("S%x %s connected from %s", c->tag, vec[0], host);
614 c->rights |= RIGHT__LOCAL;
615 sink_writes(ev_writer_sink(c->w), "230 OK\n");
618 /* oops, response was wrong */
619 disorder_info("S%x authentication failure for %s from %s",
620 c->tag, vec[0], host);
621 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
625 static int c_recent(struct conn *c,
626 char attribute((unused)) **vec,
627 int attribute((unused)) nvec) {
628 const struct queue_entry *q;
630 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
631 for(q = phead.next; q != &phead; q = q->next)
632 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
633 sink_writes(ev_writer_sink(c->w), ".\n");
634 return 1; /* completed */
637 static int c_queue(struct conn *c,
638 char attribute((unused)) **vec,
639 int attribute((unused)) nvec) {
640 struct queue_entry *q;
645 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
646 if(playing_is_enabled() && !paused) {
648 queue_fix_sofar(playing);
649 if((l = trackdb_get(playing->track, "_length"))
650 && (length = atol(l))) {
652 when += length - playing->sofar;
655 /* Nothing is playing but playing is enabled, so whatever is
656 * first in the queue can be expected to start immediately. */
659 for(q = qhead.next; q != &qhead; q = q->next) {
660 /* fill in estimated start time */
662 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
663 /* update for next track */
665 if((l = trackdb_get(q->track, "_length"))
666 && (length = atol(l)))
672 sink_writes(ev_writer_sink(c->w), ".\n");
673 return 1; /* completed */
676 static int output_list(struct conn *c, char **vec) {
678 sink_printf(ev_writer_sink(c->w), "%s\n", *vec++);
679 sink_writes(ev_writer_sink(c->w), ".\n");
683 static int files_dirs(struct conn *c,
686 enum trackdb_listable what) {
687 const char *dir, *re;
688 char errstr[RXCERR_LEN];
694 case 0: dir = 0; re = 0; break;
695 case 1: dir = vec[0]; re = 0; break;
696 case 2: dir = vec[0]; re = vec[1]; break;
699 /* A bit of a bodge to make sure the args don't trample on cache keys */
700 if(dir && strchr(dir, '\n')) {
701 sink_writes(ev_writer_sink(c->w), "550 invalid directory name\n");
704 if(re && strchr(re, '\n')) {
705 sink_writes(ev_writer_sink(c->w), "550 invalid regexp\n");
708 /* We bother eliminating "" because the web interface is relatively
709 * likely to send it */
711 byte_xasprintf(&key, "%d\n%s\n%s", (int)what, dir ? dir : "", re);
712 fvec = (char **)cache_get(&cache_files_type, key);
714 /* Got a cache hit, don't store the answer in the cache */
717 rec = 0; /* quieten compiler */
719 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
721 if(!(rec = regexp_compile(re, RXF_CASELESS,
722 errstr, sizeof(errstr), &erroffset))) {
723 sink_printf(ev_writer_sink(c->w), "550 Error compiling regexp: %s\n",
727 /* It only counts as a miss if the regexp was valid. */
728 ++cache_files_misses;
731 /* No regexp, don't bother caching the result */
737 /* No cache hit (either because a miss, or because we did not look) so do
740 fvec = trackdb_list(dir, 0, what, rec);
742 fvec = trackdb_list(0, 0, what, rec);
745 /* Put the answer in the cache */
746 cache_put(&cache_files_type, key, fvec);
747 sink_writes(ev_writer_sink(c->w), "253 Listing follow\n");
748 return output_list(c, fvec);
751 static int c_files(struct conn *c,
754 return files_dirs(c, vec, nvec, trackdb_files);
757 static int c_dirs(struct conn *c,
760 return files_dirs(c, vec, nvec, trackdb_directories);
763 static int c_allfiles(struct conn *c,
766 return files_dirs(c, vec, nvec, trackdb_directories|trackdb_files);
769 static int c_get(struct conn *c,
771 int attribute((unused)) nvec) {
772 const char *v, *track;
774 if(!(track = trackdb_resolve(vec[0]))) {
775 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
778 if(vec[1][0] != '_' && (v = trackdb_get(track, vec[1])))
779 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v));
781 sink_writes(ev_writer_sink(c->w), "555 not found\n");
785 static int c_length(struct conn *c,
787 int attribute((unused)) nvec) {
788 const char *track, *v;
790 if(!(track = trackdb_resolve(vec[0]))) {
791 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
794 if((v = trackdb_get(track, "_length")))
795 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v));
797 sink_writes(ev_writer_sink(c->w), "550 not found\n");
801 static int c_set(struct conn *c,
803 int attribute((unused)) nvec) {
806 if(!(track = trackdb_resolve(vec[0]))) {
807 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
810 if(vec[1][0] != '_' && !trackdb_set(track, vec[1], vec[2]))
811 sink_writes(ev_writer_sink(c->w), "250 OK\n");
813 sink_writes(ev_writer_sink(c->w), "550 not found\n");
817 static int c_prefs(struct conn *c,
819 int attribute((unused)) nvec) {
823 if(!(track = trackdb_resolve(vec[0]))) {
824 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
827 k = trackdb_get_all(track);
828 sink_writes(ev_writer_sink(c->w), "253 prefs follow\n");
829 for(; k; k = k->next)
830 if(k->name[0] != '_') /* omit internal values */
831 sink_printf(ev_writer_sink(c->w),
832 " %s %s\n", quoteutf8(k->name), quoteutf8(k->value));
833 sink_writes(ev_writer_sink(c->w), ".\n");
837 static int c_exists(struct conn *c,
839 int attribute((unused)) nvec) {
840 /* trackdb_exists() does its own alias checking */
841 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]);
845 static void search_parse_error(const char *msg, void *u) {
846 *(const char **)u = msg;
849 static int c_search(struct conn *c,
851 int attribute((unused)) nvec) {
852 char **terms, **results;
853 int nterms, nresults, n;
854 const char *e = "unknown error";
856 /* This is a bit of a bodge. Initially it's there to make the eclient
857 * interface a bit more convenient to add searching to, but it has the more
858 * compelling advantage that if everything uses it, then interpretation of
859 * user-supplied search strings will be the same everywhere. */
860 if(!(terms = split(vec[0], &nterms, SPLIT_QUOTES, search_parse_error, &e))) {
861 sink_printf(ev_writer_sink(c->w), "550 %s\n", e);
863 results = trackdb_search(terms, nterms, &nresults);
864 sink_printf(ev_writer_sink(c->w), "253 %d matches\n", nresults);
865 for(n = 0; n < nresults; ++n)
866 sink_printf(ev_writer_sink(c->w), "%s\n", results[n]);
867 sink_writes(ev_writer_sink(c->w), ".\n");
872 static int c_random_enable(struct conn *c,
873 char attribute((unused)) **vec,
874 int attribute((unused)) nvec) {
875 enable_random(c->who, c->ev);
876 /* Enable implicitly unpauses if there is nothing playing */
877 if(paused && !playing) resume_playing(c->who);
878 sink_writes(ev_writer_sink(c->w), "250 OK\n");
879 return 1; /* completed */
882 static int c_random_disable(struct conn *c,
883 char attribute((unused)) **vec,
884 int attribute((unused)) nvec) {
885 disable_random(c->who, c->ev);
886 sink_writes(ev_writer_sink(c->w), "250 OK\n");
887 return 1; /* completed */
890 static int c_random_enabled(struct conn *c,
891 char attribute((unused)) **vec,
892 int attribute((unused)) nvec) {
893 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[random_is_enabled()]);
894 return 1; /* completed */
897 static void got_stats(char *stats, void *u) {
898 struct conn *const c = u;
900 sink_printf(ev_writer_sink(c->w), "253 stats\n%s\n.\n", stats);
901 /* Now we can start processing commands again */
902 ev_reader_enable(c->r);
905 static int c_stats(struct conn *c,
906 char attribute((unused)) **vec,
907 int attribute((unused)) nvec) {
908 trackdb_stats_subprocess(c->ev, got_stats, c);
909 return 0; /* not yet complete */
912 static int c_volume(struct conn *c,
924 l = r = atoi(vec[0]);
935 rights = set ? RIGHT_VOLUME : RIGHT_READ;
936 if(!(c->rights & rights)) {
937 disorder_error(0, "%s attempted to set volume but lacks required rights",
939 sink_writes(ev_writer_sink(c->w), "510 Prohibited\n");
942 if(!api || !api->set_volume) {
943 sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n");
946 (set ? api->set_volume : api->get_volume)(&l, &r);
947 sink_printf(ev_writer_sink(c->w), "252 %d %d\n", l, r);
948 if(l != volume_left || r != volume_right) {
951 snprintf(lb, sizeof lb, "%d", l);
952 snprintf(rb, sizeof rb, "%d", r);
953 eventlog("volume", lb, rb, (char *)0);
958 /** @brief Called when data arrives on a log connection
960 * We just discard all such data. The client may occasionally send data as a
963 static int logging_reader_callback(ev_source attribute((unused)) *ev,
965 void attribute((unused)) *ptr,
967 int attribute((unused)) eof,
968 void attribute((unused)) *u) {
971 ev_reader_consume(reader, bytes);
973 /* Oops, that's all for now */
974 D(("logging reader eof"));
977 ev_writer_close(c->w);
981 remove_connection(c);
986 static void logclient(const char *msg, void *user) {
987 struct conn *c = user;
990 /* This connection has gone up in smoke for some reason */
991 eventlog_remove(c->lo);
995 /* user_* messages are restricted */
996 if(!strncmp(msg, "user_", 5)) {
997 /* They are only sent to admin users */
998 if(!(c->rights & RIGHT_ADMIN))
1000 /* They are not sent over TCP connections unless remote user-management is
1002 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL))
1005 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" %s\n",
1006 (uintmax_t)xtime(0), msg);
1009 static int c_log(struct conn *c,
1010 char attribute((unused)) **vec,
1011 int attribute((unused)) nvec) {
1014 sink_writes(ev_writer_sink(c->w), "254 OK\n");
1015 /* pump out initial state */
1017 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
1019 playing_is_enabled() ? "enable_play" : "disable_play");
1020 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
1022 random_is_enabled() ? "enable_random" : "disable_random");
1023 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
1025 paused ? "pause" : "resume");
1027 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state playing\n",
1029 /* Initial volume */
1030 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" volume %d %d\n",
1031 (uintmax_t)now, volume_left, volume_right);
1032 c->lo = xmalloc(sizeof *c->lo);
1033 c->lo->fn = logclient;
1035 eventlog_add(c->lo);
1036 c->reader = logging_reader_callback;
1040 /** @brief Test whether a move is allowed
1041 * @param c Connection
1042 * @param qs List of IDs on queue
1043 * @param nqs Number of IDs
1044 * @return 0 if move is prohibited, non-0 if it is allowed
1046 static int has_move_rights(struct conn *c, struct queue_entry **qs, int nqs) {
1047 for(; nqs > 0; ++qs, --nqs) {
1048 struct queue_entry *const q = *qs;
1050 if(!right_movable(c->rights, c->who, q))
1056 static int c_move(struct conn *c,
1058 int attribute((unused)) nvec) {
1059 struct queue_entry *q;
1062 if(!(q = queue_find(vec[0]))) {
1063 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1066 if(!has_move_rights(c, &q, 1)) {
1067 disorder_error(0, "%s attempted move but lacks required rights", c->who);
1068 sink_writes(ev_writer_sink(c->w),
1069 "510 Not authorized to move that track\n");
1072 n = queue_move(q, atoi(vec[1]), c->who);
1073 sink_printf(ev_writer_sink(c->w), "252 %d\n", n);
1074 /* If we've moved to the head of the queue then prepare the track. */
1080 static int c_moveafter(struct conn *c,
1082 int attribute((unused)) nvec) {
1083 struct queue_entry *q, **qs;
1087 if(!(q = queue_find(vec[0]))) {
1088 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1095 qs = xcalloc(nvec, sizeof *qs);
1096 for(n = 0; n < nvec; ++n)
1097 if(!(qs[n] = queue_find(vec[n]))) {
1098 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1101 if(!has_move_rights(c, qs, nvec)) {
1102 disorder_error(0, "%s attempted moveafter but lacks required rights",
1104 sink_writes(ev_writer_sink(c->w),
1105 "510 Not authorized to move those tracks\n");
1108 queue_moveafter(q, nvec, qs, c->who);
1109 sink_printf(ev_writer_sink(c->w), "250 Moved tracks\n");
1110 /* If we've moved to the head of the queue then prepare the track. */
1116 static int c_part(struct conn *c,
1118 int attribute((unused)) nvec) {
1121 if(!(track = trackdb_resolve(vec[0]))) {
1122 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
1125 sink_printf(ev_writer_sink(c->w), "252 %s\n",
1126 quoteutf8(trackdb_getpart(track, vec[1], vec[2])));
1130 static int c_resolve(struct conn *c,
1132 int attribute((unused)) nvec) {
1135 if(!(track = trackdb_resolve(vec[0]))) {
1136 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
1139 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(track));
1143 static int list_response(struct conn *c,
1146 sink_printf(ev_writer_sink(c->w), "253 %s\n", reply);
1148 sink_printf(ev_writer_sink(c->w), "%s%s\n",
1149 **list == '.' ? "." : "", *list);
1152 sink_writes(ev_writer_sink(c->w), ".\n");
1153 return 1; /* completed */
1156 static int c_tags(struct conn *c,
1157 char attribute((unused)) **vec,
1158 int attribute((unused)) nvec) {
1159 return list_response(c, "Tag list follows", trackdb_alltags());
1162 static int c_set_global(struct conn *c,
1164 int attribute((unused)) nvec) {
1165 if(vec[0][0] == '_') {
1166 sink_writes(ev_writer_sink(c->w), "550 cannot set internal global preferences\n");
1169 /* We special-case the 'magic' preferences here. */
1170 if(!strcmp(vec[0], "playing")) {
1171 (flag_enabled(vec[1]) ? enable_playing : disable_playing)(c->who, c->ev);
1172 sink_printf(ev_writer_sink(c->w), "250 OK\n");
1173 } else if(!strcmp(vec[0], "random-play")) {
1174 (flag_enabled(vec[1]) ? enable_random : disable_random)(c->who, c->ev);
1175 sink_printf(ev_writer_sink(c->w), "250 OK\n");
1177 if(!trackdb_set_global(vec[0], vec[1], c->who))
1178 sink_printf(ev_writer_sink(c->w), "250 OK\n");
1180 sink_writes(ev_writer_sink(c->w), "550 not found\n");
1185 static int c_get_global(struct conn *c,
1187 int attribute((unused)) nvec) {
1188 const char *s = trackdb_get_global(vec[0]);
1191 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(s));
1193 sink_writes(ev_writer_sink(c->w), "555 not found\n");
1197 static int c_nop(struct conn *c,
1198 char attribute((unused)) **vec,
1199 int attribute((unused)) nvec) {
1200 sink_printf(ev_writer_sink(c->w), "250 Quack\n");
1204 static int c_new(struct conn *c,
1214 if(max <= 0 || max > config->new_max)
1215 max = config->new_max;
1216 tracks = trackdb_new(0, max);
1217 sink_printf(ev_writer_sink(c->w), "253 New track list follows\n");
1219 sink_printf(ev_writer_sink(c->w), "%s%s\n",
1220 **tracks == '.' ? "." : "", *tracks);
1223 sink_writes(ev_writer_sink(c->w), ".\n");
1224 return 1; /* completed */
1228 static int c_rtp_address(struct conn *c,
1229 char attribute((unused)) **vec,
1230 int attribute((unused)) nvec) {
1231 if(api == &uaudio_rtp) {
1234 if(!strcmp(config->rtp_mode, "request"))
1235 sink_printf(ev_writer_sink(c->w), "252 - -\n");
1237 netaddress_format(&config->broadcast, NULL, &addr);
1238 sink_printf(ev_writer_sink(c->w), "252 %s %s\n",
1240 quoteutf8(addr[2]));
1243 sink_writes(ev_writer_sink(c->w), "550 No RTP\n");
1247 static int c_rtp_cancel(struct conn *c,
1248 char attribute((unused)) **vec,
1249 int attribute((unused)) nvec) {
1250 if(!c->rtp_requested) {
1251 sink_writes(ev_writer_sink(c->w), "550 No active RTP stream\n");
1254 rtp_request_cancel(&c->rtp_destination);
1255 c->rtp_requested = 0;
1256 sink_writes(ev_writer_sink(c->w), "250 Cancelled RTP stream\n");
1260 static int c_rtp_request(struct conn *c,
1262 int attribute((unused)) nvec) {
1263 static const struct addrinfo hints = {
1264 .ai_family = AF_UNSPEC,
1265 .ai_socktype = SOCK_DGRAM,
1266 .ai_protocol = IPPROTO_UDP,
1267 .ai_flags = AI_NUMERICHOST|AI_NUMERICSERV,
1269 struct addrinfo *res;
1270 int rc = getaddrinfo(vec[0], vec[1], &hints, &res);
1272 disorder_error(0, "%s port %s: %s",
1273 vec[0], vec[1], gai_strerror(rc));
1274 sink_writes(ev_writer_sink(c->w), "550 Invalid address\n");
1277 disorder_info("%s requested RTP stream to %s %s", c->who, vec[0], vec[1]);
1278 /* TODO might be useful to tighten this up to restrict clients to targetting
1279 * themselves only */
1280 if(c->rtp_requested) {
1281 rtp_request_cancel(&c->rtp_destination);
1282 c->rtp_requested = 0;
1284 memcpy(&c->rtp_destination, res->ai_addr, res->ai_addrlen);
1286 rtp_request(&c->rtp_destination);
1287 c->rtp_requested = 1;
1288 sink_writes(ev_writer_sink(c->w), "250 Initiated RTP stream\n");
1289 // TODO teardown on connection close
1293 static int c_cookie(struct conn *c,
1295 int attribute((unused)) nvec) {
1300 /* Can't log in twice on the same connection */
1302 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
1305 /* Get some kind of peer identifcation */
1306 if(!(host = connection_host(c))) {
1307 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
1310 /* Check the cookie */
1311 user = verify_cookie(vec[0], &rights);
1313 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
1320 if(strcmp(host, "local"))
1321 disorder_info("S%x %s connected with cookie from %s", c->tag, user, host);
1323 c->rights |= RIGHT__LOCAL;
1324 /* Response contains username so client knows who they are acting as */
1325 sink_printf(ev_writer_sink(c->w), "232 %s\n", quoteutf8(user));
1329 static int c_make_cookie(struct conn *c,
1330 char attribute((unused)) **vec,
1331 int attribute((unused)) nvec) {
1332 const char *cookie = make_cookie(c->who);
1335 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(cookie));
1337 sink_writes(ev_writer_sink(c->w), "550 Cannot create cookie\n");
1341 static int c_revoke(struct conn *c,
1342 char attribute((unused)) **vec,
1343 int attribute((unused)) nvec) {
1345 revoke_cookie(c->cookie);
1346 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1348 sink_writes(ev_writer_sink(c->w), "510 Did not log in with cookie\n");
1352 static int c_adduser(struct conn *c,
1357 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
1358 disorder_error(0, "S%x: remote adduser", c->tag);
1359 sink_writes(ev_writer_sink(c->w), "510 Remote user management is disabled\n");
1364 if(parse_rights(vec[2], 0, 1)) {
1365 sink_writes(ev_writer_sink(c->w), "550 Invalid rights list\n");
1369 rights = config->default_rights;
1370 if(trackdb_adduser(vec[0], vec[1], rights,
1371 0/*email*/, 0/*confirmation*/))
1372 sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
1374 sink_writes(ev_writer_sink(c->w), "250 User created\n");
1378 static int c_deluser(struct conn *c,
1380 int attribute((unused)) nvec) {
1383 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
1384 disorder_error(0, "S%x: remote deluser", c->tag);
1385 sink_writes(ev_writer_sink(c->w), "510 Remote user management is disabled\n");
1388 if(trackdb_deluser(vec[0])) {
1389 sink_writes(ev_writer_sink(c->w), "550 Cannot delete user\n");
1392 /* Zap connections belonging to deleted user */
1393 for(d = connections; d; d = d->next)
1394 if(!strcmp(d->who, vec[0]))
1396 sink_writes(ev_writer_sink(c->w), "250 User deleted\n");
1400 static int c_edituser(struct conn *c,
1402 int attribute((unused)) nvec) {
1405 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
1406 disorder_error(0, "S%x: remote edituser", c->tag);
1407 sink_writes(ev_writer_sink(c->w), "510 Remote user management is disabled\n");
1410 /* RIGHT_ADMIN can do anything; otherwise you can only set your own email
1411 * address and password. */
1412 if((c->rights & RIGHT_ADMIN)
1413 || (!strcmp(c->who, vec[0])
1414 && (!strcmp(vec[1], "email")
1415 || !strcmp(vec[1], "password")))) {
1416 if(trackdb_edituserinfo(vec[0], vec[1], vec[2])) {
1417 sink_writes(ev_writer_sink(c->w), "550 Failed to change setting\n");
1420 if(!strcmp(vec[1], "password")) {
1421 /* Zap all connections for this user after a password change */
1422 for(d = connections; d; d = d->next)
1423 if(!strcmp(d->who, vec[0]))
1425 } else if(!strcmp(vec[1], "rights")) {
1426 /* Update rights for this user */
1429 if(!parse_rights(vec[2], &r, 1)) {
1430 const char *new_rights = rights_string(r);
1431 for(d = connections; d; d = d->next) {
1432 if(!strcmp(d->who, vec[0])) {
1435 /* Notify any log connections */
1437 sink_printf(ev_writer_sink(d->w),
1438 "%"PRIxMAX" rights_changed %s\n",
1439 (uintmax_t)xtime(0),
1440 quoteutf8(new_rights));
1445 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1447 disorder_error(0, "%s attempted edituser but lacks required rights",
1449 sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n");
1454 static int c_userinfo(struct conn *c,
1455 char attribute((unused)) **vec,
1456 int attribute((unused)) nvec) {
1460 /* We allow remote querying of rights so that clients can figure out what
1461 * they're allowed to do */
1462 if(!config->remote_userman
1463 && !(c->rights & RIGHT__LOCAL)
1464 && strcmp(vec[1], "rights")) {
1465 disorder_error(0, "S%x: remote userinfo %s %s", c->tag, vec[0], vec[1]);
1466 sink_writes(ev_writer_sink(c->w), "510 Remote user management is disabled\n");
1469 /* RIGHT_ADMIN allows anything; otherwise you can only get your own email
1470 * address and rights list. */
1471 if((c->rights & RIGHT_ADMIN)
1472 || (!strcmp(c->who, vec[0])
1473 && (!strcmp(vec[1], "email")
1474 || !strcmp(vec[1], "rights")))) {
1475 if((k = trackdb_getuserinfo(vec[0])))
1476 if((value = kvp_get(k, vec[1])))
1477 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(value));
1479 sink_writes(ev_writer_sink(c->w), "555 Not set\n");
1481 sink_writes(ev_writer_sink(c->w), "550 No such user\n");
1483 disorder_error(0, "%s attempted userinfo but lacks required rights",
1485 sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n");
1490 static int c_users(struct conn *c,
1491 char attribute((unused)) **vec,
1492 int attribute((unused)) nvec) {
1493 return list_response(c, "User list follows", trackdb_listusers());
1496 static int c_register(struct conn *c,
1498 int attribute((unused)) nvec) {
1500 uint32_t nonce[CONFIRM_SIZE];
1501 char nonce_str[(32 * CONFIRM_SIZE) / 5 + 1];
1503 /* The confirmation string is username/base62(nonce). The confirmation
1504 * process will pick the username back out to identify them but the _whole_
1505 * string is used as the confirmation string. Base 62 means we used only
1506 * letters and digits, minimizing the chance of the URL being mispasted. */
1507 gcry_randomize(nonce, sizeof nonce, GCRY_STRONG_RANDOM);
1508 if(basen(nonce, CONFIRM_SIZE, nonce_str, sizeof nonce_str, 62)) {
1509 disorder_error(0, "buffer too small encoding confirmation string");
1510 sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
1512 byte_xasprintf(&cs, "%s/%s", vec[0], nonce_str);
1513 if(trackdb_adduser(vec[0], vec[1], config->default_rights, vec[2], cs))
1514 sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
1516 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(cs));
1520 static int c_confirm(struct conn *c,
1522 int attribute((unused)) nvec) {
1527 /* Get some kind of peer identifcation */
1528 if(!(host = connection_host(c))) {
1529 sink_writes(ev_writer_sink(c->w), "530 Authentication failure\n");
1532 /* Picking the LAST / means we don't (here) rule out slashes in usernames. */
1533 if(!(sep = strrchr(vec[0], '/'))) {
1534 sink_writes(ev_writer_sink(c->w), "550 Malformed confirmation string\n");
1537 user = xstrndup(vec[0], sep - vec[0]);
1538 if(trackdb_confirm(user, vec[0], &rights))
1539 sink_writes(ev_writer_sink(c->w), "510 Incorrect confirmation string\n");
1544 if(strcmp(host, "local"))
1545 disorder_info("S%x %s confirmed from %s", c->tag, user, host);
1547 c->rights |= RIGHT__LOCAL;
1548 /* Response contains username so client knows who they are acting as */
1549 sink_printf(ev_writer_sink(c->w), "232 %s\n", quoteutf8(user));
1554 static int sent_reminder(ev_source attribute((unused)) *ev,
1555 pid_t attribute((unused)) pid,
1557 const struct rusage attribute((unused)) *rusage,
1559 struct conn *const c = u;
1561 /* Tell the client what went down */
1563 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1565 disorder_error(0, "reminder subprocess %s", wstat(status));
1566 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1568 /* Re-enable this connection */
1569 ev_reader_enable(c->r);
1573 static int c_reminder(struct conn *c,
1575 int attribute((unused)) nvec) {
1577 const char *password, *email, *text, *encoding, *charset, *content_type;
1582 static hash *last_reminder;
1584 if(!config->mail_sender) {
1585 disorder_error(0, "cannot send password reminders because mail_sender not set");
1586 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1589 if(!(k = trackdb_getuserinfo(vec[0]))) {
1590 disorder_error(0, "reminder for user '%s' who does not exist", vec[0]);
1591 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1594 if(!(email = kvp_get(k, "email"))
1595 || !email_valid(email)) {
1596 disorder_error(0, "user '%s' has no valid email address", vec[0]);
1597 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1600 if(!(password = kvp_get(k, "password"))
1602 disorder_error(0, "user '%s' has no password", vec[0]);
1603 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1606 /* Rate-limit reminders. This hash is bounded in size by the number of
1607 * users. If this is actually a problem for anyone then we can periodically
1610 last_reminder = hash_new(sizeof (time_t));
1611 last = hash_find(last_reminder, vec[0]);
1613 if(last && now < *last + config->reminder_interval) {
1614 disorder_error(0, "sent a password reminder to '%s' too recently", vec[0]);
1615 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1618 /* Send the reminder */
1619 /* TODO this should be templatized and to some extent merged with
1620 * the code in act_register() */
1621 byte_xasprintf((char **)&text,
1622 "Someone requested that you be sent a reminder of your DisOrder password.\n"
1623 "Your password is:\n"
1626 if(!(text = mime_encode_text(text, &charset, &encoding)))
1627 disorder_fatal(0, "cannot encode email");
1628 byte_xasprintf((char **)&content_type, "text/plain;charset=%s",
1629 quote822(charset, 0));
1630 pid = sendmail_subprocess("", config->mail_sender, email,
1631 "DisOrder password reminder",
1632 encoding, content_type, text);
1634 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1637 hash_add(last_reminder, vec[0], &now, HASH_INSERT_OR_REPLACE);
1638 disorder_info("sending a passsword reminder to user '%s'", vec[0]);
1639 /* We can only continue when the subprocess finishes */
1640 ev_child(c->ev, pid, 0, sent_reminder, c);
1644 static int c_schedule_list(struct conn *c,
1645 char attribute((unused)) **vec,
1646 int attribute((unused)) nvec) {
1647 char **ids = schedule_list(0);
1648 sink_writes(ev_writer_sink(c->w), "253 ID list follows\n");
1650 sink_printf(ev_writer_sink(c->w), "%s\n", *ids++);
1651 sink_writes(ev_writer_sink(c->w), ".\n");
1652 return 1; /* completed */
1655 static int c_schedule_get(struct conn *c,
1657 int attribute((unused)) nvec) {
1658 struct kvp *actiondata = schedule_get(vec[0]), *k;
1661 sink_writes(ev_writer_sink(c->w), "555 No such event\n");
1662 return 1; /* completed */
1664 /* Scheduled events are public information. Anyone with RIGHT_READ can see
1666 sink_writes(ev_writer_sink(c->w), "253 Event information follows\n");
1667 for(k = actiondata; k; k = k->next)
1668 sink_printf(ev_writer_sink(c->w), " %s %s\n",
1669 quoteutf8(k->name), quoteutf8(k->value));
1670 sink_writes(ev_writer_sink(c->w), ".\n");
1671 return 1; /* completed */
1674 static int c_schedule_del(struct conn *c,
1676 int attribute((unused)) nvec) {
1677 struct kvp *actiondata = schedule_get(vec[0]);
1680 sink_writes(ev_writer_sink(c->w), "555 No such event\n");
1681 return 1; /* completed */
1683 /* If you have admin rights you can delete anything. If you don't then you
1684 * can only delete your own scheduled events. */
1685 if(!(c->rights & RIGHT_ADMIN)) {
1686 const char *who = kvp_get(actiondata, "who");
1688 if(!who || !c->who || strcmp(who, c->who)) {
1689 sink_writes(ev_writer_sink(c->w), "510 Not authorized\n");
1690 return 1; /* completed */
1693 if(schedule_del(vec[0]))
1694 sink_writes(ev_writer_sink(c->w), "550 Could not delete scheduled event\n");
1696 sink_writes(ev_writer_sink(c->w), "250 Deleted\n");
1697 return 1; /* completed */
1700 static int c_schedule_add(struct conn *c,
1703 struct kvp *actiondata = 0;
1706 /* Standard fields */
1707 kvp_set(&actiondata, "who", c->who);
1708 kvp_set(&actiondata, "when", vec[0]);
1709 kvp_set(&actiondata, "priority", vec[1]);
1710 kvp_set(&actiondata, "action", vec[2]);
1711 /* Action-dependent fields */
1712 if(!strcmp(vec[2], "play")) {
1714 sink_writes(ev_writer_sink(c->w), "550 Wrong number of arguments\n");
1717 if(!trackdb_exists(vec[3])) {
1718 sink_writes(ev_writer_sink(c->w), "550 Track is not in database\n");
1721 kvp_set(&actiondata, "track", vec[3]);
1722 } else if(!strcmp(vec[2], "set-global")) {
1723 if(nvec < 4 || nvec > 5) {
1724 sink_writes(ev_writer_sink(c->w), "550 Wrong number of arguments\n");
1727 kvp_set(&actiondata, "key", vec[3]);
1729 kvp_set(&actiondata, "value", vec[4]);
1731 sink_writes(ev_writer_sink(c->w), "550 Unknown action\n");
1734 /* schedule_add() checks user rights */
1735 id = schedule_add(c->ev, actiondata);
1737 sink_writes(ev_writer_sink(c->w), "550 Cannot add scheduled event\n");
1739 sink_printf(ev_writer_sink(c->w), "252 %s\n", id);
1743 static int c_adopt(struct conn *c,
1745 int attribute((unused)) nvec) {
1746 struct queue_entry *q;
1749 sink_writes(ev_writer_sink(c->w), "550 no identity\n");
1752 if(!(q = queue_find(vec[0]))) {
1753 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1756 if(q->origin != origin_random) {
1757 sink_writes(ev_writer_sink(c->w), "550 not a random track\n");
1760 q->origin = origin_adopted;
1761 q->submitter = xstrdup(c->who);
1762 eventlog("adopted", q->id, q->submitter, (char *)0);
1764 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1768 static int playlist_response(struct conn *c,
1772 assert(!"cannot cope with success");
1774 sink_writes(ev_writer_sink(c->w), "510 Access denied\n");
1777 sink_writes(ev_writer_sink(c->w), "550 Invalid playlist name\n");
1780 sink_writes(ev_writer_sink(c->w), "555 No such playlist\n");
1783 sink_writes(ev_writer_sink(c->w), "550 Error accessing playlist\n");
1789 static int c_playlist_get(struct conn *c,
1791 int attribute((unused)) nvec) {
1795 if(!(err = trackdb_playlist_get(vec[0], c->who, &tracks, 0, 0)))
1796 return list_response(c, "Playlist contents follows", tracks);
1798 return playlist_response(c, err);
1801 static int c_playlist_set(struct conn *c,
1803 int attribute((unused)) nvec) {
1804 return fetch_body(c, c_playlist_set_body, vec[0]);
1807 static int c_playlist_set_body(struct conn *c,
1811 const char *playlist = u;
1814 if(!c->locked_playlist
1815 || strcmp(playlist, c->locked_playlist)) {
1816 sink_writes(ev_writer_sink(c->w), "550 Playlist is not locked\n");
1819 if(!(err = trackdb_playlist_set(playlist, c->who,
1821 sink_printf(ev_writer_sink(c->w), "250 OK\n");
1824 return playlist_response(c, err);
1827 static int c_playlist_get_share(struct conn *c,
1829 int attribute((unused)) nvec) {
1833 if(!(err = trackdb_playlist_get(vec[0], c->who, 0, 0, &share))) {
1834 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(share));
1837 return playlist_response(c, err);
1840 static int c_playlist_set_share(struct conn *c,
1842 int attribute((unused)) nvec) {
1845 if(!(err = trackdb_playlist_set(vec[0], c->who, 0, 0, vec[1]))) {
1846 sink_printf(ev_writer_sink(c->w), "250 OK\n");
1849 return playlist_response(c, err);
1852 static int c_playlists(struct conn *c,
1853 char attribute((unused)) **vec,
1854 int attribute((unused)) nvec) {
1857 trackdb_playlist_list(c->who, &p, 0);
1858 return list_response(c, "List of playlists follows", p);
1861 static int c_playlist_delete(struct conn *c,
1863 int attribute((unused)) nvec) {
1866 if(!(err = trackdb_playlist_delete(vec[0], c->who))) {
1867 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1870 return playlist_response(c, err);
1873 static int c_playlist_lock(struct conn *c,
1875 int attribute((unused)) nvec) {
1879 /* Check we're allowed to modify this playlist */
1880 if((err = trackdb_playlist_set(vec[0], c->who, 0, 0, 0)))
1881 return playlist_response(c, err);
1882 /* If we hold a lock don't allow a new one */
1883 if(c->locked_playlist) {
1884 sink_writes(ev_writer_sink(c->w), "550 Already holding a lock\n");
1887 /* See if some other connection locks the same playlist */
1888 for(cc = connections; cc; cc = cc->next)
1889 if(cc->locked_playlist && !strcmp(cc->locked_playlist, vec[0]))
1892 /* TODO: implement config->playlist_lock_timeout */
1893 sink_writes(ev_writer_sink(c->w), "550 Already locked\n");
1896 c->locked_playlist = xstrdup(vec[0]);
1897 time(&c->locked_when);
1898 sink_writes(ev_writer_sink(c->w), "250 Acquired lock\n");
1902 static int c_playlist_unlock(struct conn *c,
1903 char attribute((unused)) **vec,
1904 int attribute((unused)) nvec) {
1905 if(!c->locked_playlist) {
1906 sink_writes(ev_writer_sink(c->w), "550 Not holding a lock\n");
1909 c->locked_playlist = 0;
1910 sink_writes(ev_writer_sink(c->w), "250 Released lock\n");
1914 /** @brief Server's definition of a command */
1915 static const struct server_command {
1916 /** @brief Command name */
1919 /** @brief Minimum number of arguments */
1922 /** @brief Maximum number of arguments */
1925 /** @brief Function to process command */
1926 int (*fn)(struct conn *, char **, int);
1928 /** @brief Rights required to execute command
1930 * 0 means that the command can be issued without logging in. If multiple
1931 * bits are listed here any of those rights will do.
1935 { "adduser", 2, 3, c_adduser, RIGHT_ADMIN },
1936 { "adopt", 1, 1, c_adopt, RIGHT_PLAY },
1937 { "allfiles", 0, 2, c_allfiles, RIGHT_READ },
1938 { "confirm", 1, 1, c_confirm, 0 },
1939 { "cookie", 1, 1, c_cookie, 0 },
1940 { "deluser", 1, 1, c_deluser, RIGHT_ADMIN },
1941 { "dirs", 0, 2, c_dirs, RIGHT_READ },
1942 { "disable", 0, 1, c_disable, RIGHT_GLOBAL_PREFS },
1943 { "edituser", 3, 3, c_edituser, RIGHT_ADMIN|RIGHT_USERINFO },
1944 { "enable", 0, 0, c_enable, RIGHT_GLOBAL_PREFS },
1945 { "enabled", 0, 0, c_enabled, RIGHT_READ },
1946 { "exists", 1, 1, c_exists, RIGHT_READ },
1947 { "files", 0, 2, c_files, RIGHT_READ },
1948 { "get", 2, 2, c_get, RIGHT_READ },
1949 { "get-global", 1, 1, c_get_global, RIGHT_READ },
1950 { "length", 1, 1, c_length, RIGHT_READ },
1951 { "log", 0, 0, c_log, RIGHT_READ },
1952 { "make-cookie", 0, 0, c_make_cookie, RIGHT_READ },
1953 { "move", 2, 2, c_move, RIGHT_MOVE__MASK },
1954 { "moveafter", 1, INT_MAX, c_moveafter, RIGHT_MOVE__MASK },
1955 { "new", 0, 1, c_new, RIGHT_READ },
1956 { "nop", 0, 0, c_nop, 0 },
1957 { "part", 3, 3, c_part, RIGHT_READ },
1958 { "pause", 0, 0, c_pause, RIGHT_PAUSE },
1959 { "play", 1, 1, c_play, RIGHT_PLAY },
1960 { "playafter", 2, INT_MAX, c_playafter, RIGHT_PLAY },
1961 { "playing", 0, 0, c_playing, RIGHT_READ },
1962 { "playlist-delete", 1, 1, c_playlist_delete, RIGHT_PLAY },
1963 { "playlist-get", 1, 1, c_playlist_get, RIGHT_READ },
1964 { "playlist-get-share", 1, 1, c_playlist_get_share, RIGHT_READ },
1965 { "playlist-lock", 1, 1, c_playlist_lock, RIGHT_PLAY },
1966 { "playlist-set", 1, 1, c_playlist_set, RIGHT_PLAY },
1967 { "playlist-set-share", 2, 2, c_playlist_set_share, RIGHT_PLAY },
1968 { "playlist-unlock", 0, 0, c_playlist_unlock, RIGHT_PLAY },
1969 { "playlists", 0, 0, c_playlists, RIGHT_READ },
1970 { "prefs", 1, 1, c_prefs, RIGHT_READ },
1971 { "queue", 0, 0, c_queue, RIGHT_READ },
1972 { "random-disable", 0, 0, c_random_disable, RIGHT_GLOBAL_PREFS },
1973 { "random-enable", 0, 0, c_random_enable, RIGHT_GLOBAL_PREFS },
1974 { "random-enabled", 0, 0, c_random_enabled, RIGHT_READ },
1975 { "recent", 0, 0, c_recent, RIGHT_READ },
1976 { "reconfigure", 0, 0, c_reconfigure, RIGHT_ADMIN },
1977 { "register", 3, 3, c_register, RIGHT_REGISTER },
1978 { "reminder", 1, 1, c_reminder, RIGHT__LOCAL },
1979 { "remove", 1, 1, c_remove, RIGHT_REMOVE__MASK },
1980 { "rescan", 0, INT_MAX, c_rescan, RIGHT_RESCAN },
1981 { "resolve", 1, 1, c_resolve, RIGHT_READ },
1982 { "resume", 0, 0, c_resume, RIGHT_PAUSE },
1983 { "revoke", 0, 0, c_revoke, RIGHT_READ },
1984 { "rtp-address", 0, 0, c_rtp_address, 0 },
1985 { "rtp-cancel", 0, 0, c_rtp_cancel, 0 },
1986 { "rtp-request", 2, 2, c_rtp_request, RIGHT_READ },
1987 { "schedule-add", 3, INT_MAX, c_schedule_add, RIGHT_READ },
1988 { "schedule-del", 1, 1, c_schedule_del, RIGHT_READ },
1989 { "schedule-get", 1, 1, c_schedule_get, RIGHT_READ },
1990 { "schedule-list", 0, 0, c_schedule_list, RIGHT_READ },
1991 { "scratch", 0, 1, c_scratch, RIGHT_SCRATCH__MASK },
1992 { "search", 1, 1, c_search, RIGHT_READ },
1993 { "set", 3, 3, c_set, RIGHT_PREFS, },
1994 { "set-global", 2, 2, c_set_global, RIGHT_GLOBAL_PREFS },
1995 { "shutdown", 0, 0, c_shutdown, RIGHT_ADMIN },
1996 { "stats", 0, 0, c_stats, RIGHT_READ },
1997 { "tags", 0, 0, c_tags, RIGHT_READ },
1998 { "unset", 2, 2, c_set, RIGHT_PREFS },
1999 { "unset-global", 1, 1, c_set_global, RIGHT_GLOBAL_PREFS },
2000 { "user", 2, 2, c_user, 0 },
2001 { "userinfo", 2, 2, c_userinfo, RIGHT_READ },
2002 { "users", 0, 0, c_users, RIGHT_READ },
2003 { "version", 0, 0, c_version, RIGHT_READ },
2004 { "volume", 0, 2, c_volume, RIGHT_READ|RIGHT_VOLUME }
2007 /** @brief Fetch a command body
2008 * @param c Connection
2009 * @param body_callback Called with body
2010 * @param u Passed to body_callback
2013 static int fetch_body(struct conn *c,
2014 body_callback_type body_callback,
2016 assert(c->line_reader == command);
2017 c->line_reader = body_line;
2018 c->body_callback = body_callback;
2020 vector_init(c->body);
2024 /** @brief @ref line_reader_type callback for command body lines
2025 * @param c Connection
2027 * @return 1 if complete, 0 if incomplete
2029 * Called from reader_callback().
2031 static int body_line(struct conn *c,
2036 /* That's the lot */
2037 c->line_reader = command;
2038 vector_terminate(c->body);
2039 return c->body_callback(c, c->body->vec, c->body->nvec, c->body_u);
2042 vector_append(c->body, xstrdup(line));
2043 return 1; /* completed */
2046 static void command_error(const char *msg, void *u) {
2049 sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg);
2052 /** @brief @ref line_reader_type callback for commands
2053 * @param c Connection
2055 * @return 1 if complete, 0 if incomplete
2057 * Called from reader_callback().
2059 static int command(struct conn *c, char *line) {
2063 D(("server command %s", line));
2064 /* We force everything into NFC as early as possible */
2065 if(!(line = utf8_compose_canon(line, strlen(line), 0))) {
2066 sink_writes(ev_writer_sink(c->w), "500 cannot normalize command\n");
2069 if(!(vec = split(line, &nvec, SPLIT_QUOTES, command_error, c))) {
2070 sink_writes(ev_writer_sink(c->w), "500 cannot parse command\n");
2074 sink_writes(ev_writer_sink(c->w), "500 do what?\n");
2077 if((n = TABLE_FIND(commands, name, vec[0])) < 0)
2078 sink_writes(ev_writer_sink(c->w), "500 unknown command\n");
2080 if(commands[n].rights
2081 && !(c->rights & commands[n].rights)) {
2082 disorder_error(0, "%s attempted %s but lacks required rights",
2083 c->who ? c->who : "NULL",
2085 sink_writes(ev_writer_sink(c->w), "510 Prohibited\n");
2090 if(nvec < commands[n].minargs) {
2091 sink_writes(ev_writer_sink(c->w), "500 missing argument(s)\n");
2094 if(nvec > commands[n].maxargs) {
2095 sink_writes(ev_writer_sink(c->w), "500 too many arguments\n");
2098 return commands[n].fn(c, vec, nvec);
2100 return 1; /* completed */
2103 /* redirect to the right reader callback for our current state */
2104 static int redirect_reader_callback(ev_source *ev,
2112 return c->reader(ev, reader, ptr, bytes, eof, u);
2115 /* the main command reader */
2116 static int reader_callback(ev_source attribute((unused)) *ev,
2126 D(("server reader_callback"));
2127 while((eol = memchr(ptr, '\n', bytes))) {
2129 ev_reader_consume(reader, eol - (char *)ptr);
2130 complete = c->line_reader(c, ptr); /* usually command() */
2131 bytes -= (eol - (char *)ptr);
2134 /* the command had better have set a new reader callback */
2136 /* there are further bytes to read, or we are at eof; arrange for the
2137 * command's reader callback to handle them */
2138 return ev_reader_incomplete(reader);
2139 /* nothing's going on right now */
2142 /* command completed, we can go around and handle the next one */
2146 disorder_error(0, "S%x unterminated line", c->tag);
2147 D(("normal reader close"));
2150 D(("close associated writer"));
2151 ev_writer_close(c->w);
2154 remove_connection(c);
2159 static int listen_callback(ev_source *ev,
2161 const struct sockaddr attribute((unused)) *remote,
2162 socklen_t attribute((unused)) rlen,
2164 const struct listener *l = u;
2165 struct conn *c = xmalloc(sizeof *c);
2166 static unsigned tags;
2168 D(("server listen_callback fd %d (%s)", fd, l->name));
2171 c->next = connections;
2174 c->w = ev_writer_new(ev, fd, writer_error, c,
2177 disorder_error(0, "ev_writer_new for file inbound connection (fd=%d) failed",
2182 c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c,
2185 /* Main reason for failure is the FD is too big and that will already have
2188 "ev_reader_new for file inbound connection (fd=%d) failed",
2192 c->reader = reader_callback;
2195 c->line_reader = command;
2197 gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM);
2198 sink_printf(ev_writer_sink(c->w), "231 %d %s %s\n",
2200 config->authorization_algorithm,
2201 hex(c->nonce, sizeof c->nonce));
2205 int server_start(ev_source *ev, int pf,
2206 size_t socklen, const struct sockaddr *sa,
2210 struct listener *l = xmalloc(sizeof *l);
2211 static const int one = 1;
2213 D(("server_init socket %s privileged=%d", name, privileged));
2215 if(privileged && pf != AF_UNIX)
2216 disorder_fatal(0, "cannot create a privileged listener on a non-local port");
2217 fd = xsocket(pf, SOCK_STREAM, 0);
2218 xsetsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
2219 if(bind(fd, sa, socklen) < 0) {
2220 disorder_error(errno, "error binding to %s", name);
2228 l->privileged = privileged;
2229 if(ev_listen(ev, fd, listen_callback, l, "server listener"))
2231 disorder_info("listening on %s", name);
2235 int server_stop(ev_source *ev, int fd) {
2237 return ev_listen_cancel(ev, fd);