2 * This file is part of DisOrder.
3 * Copyright (C) 2004-2009 Richard Kettlewell
5 * This program is free software: you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation, either version 3 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 #include "disorder-server.h"
22 # define NONCE_SIZE 16
26 # define CONFIRM_SIZE 10
29 int volume_left, volume_right; /* last known volume */
31 /** @brief Accept all well-formed login attempts
42 /** @brief One client connection */
44 /** @brief Read commands from here */
46 /** @brief Send responses to here */
48 /** @brief Underlying file descriptor */
50 /** @brief Unique identifier for connection used in log messages */
52 /** @brief Login name or NULL */
54 /** @brief Event loop */
56 /** @brief Nonce chosen for this connection */
57 unsigned char nonce[NONCE_SIZE];
58 /** @brief Current reader callback
60 * We change this depending on whether we're servicing the @b log command
62 ev_reader_callback *reader;
63 /** @brief Event log output sending to this connection */
64 struct eventlog_output *lo;
65 /** @brief Parent listener */
66 const struct listener *l;
67 /** @brief Login cookie or NULL */
69 /** @brief Connection rights */
71 /** @brief Next connection */
73 /** @brief True if pending rescan had 'wait' set */
77 /** @brief Linked list of connections */
78 static struct conn *connections;
80 static int reader_callback(ev_source *ev,
87 static const char *noyes[] = { "no", "yes" };
89 /** @brief Remove a connection from the connection list */
90 static void remove_connection(struct conn *c) {
93 for(cc = &connections; *cc && *cc != c; cc = &(*cc)->next)
99 /** @brief Called when a connection's writer fails or is shut down
101 * If the connection still has a raeder that is cancelled.
103 static int writer_error(ev_source attribute((unused)) *ev,
108 D(("server writer_error S%x %d", c->tag, errno_value));
109 if(errno_value == 0) {
111 D(("S%x writer completed", c->tag));
113 if(errno_value != EPIPE)
114 error(errno_value, "S%x write error on socket", c->tag);
116 D(("cancel reader"));
117 ev_reader_cancel(c->r);
120 D(("done cancel reader"));
124 remove_connection(c);
128 /** @brief Called when a conncetion's reader fails or is shut down
130 * If connection still has a writer then it is closed.
132 static int reader_error(ev_source attribute((unused)) *ev,
137 D(("server reader_error S%x %d", c->tag, errno_value));
138 error(errno_value, "S%x read error on socket", c->tag);
140 ev_writer_close(c->w);
144 remove_connection(c);
148 static int c_disable(struct conn *c, char **vec, int nvec) {
150 disable_playing(c->who);
151 else if(nvec == 1 && !strcmp(vec[0], "now"))
152 disable_playing(c->who);
154 sink_writes(ev_writer_sink(c->w), "550 invalid argument\n");
155 return 1; /* completed */
157 sink_writes(ev_writer_sink(c->w), "250 OK\n");
158 return 1; /* completed */
161 static int c_enable(struct conn *c,
162 char attribute((unused)) **vec,
163 int attribute((unused)) nvec) {
164 enable_playing(c->who, c->ev);
165 /* Enable implicitly unpauses if there is nothing playing */
166 if(paused && !playing) resume_playing(c->who);
167 sink_writes(ev_writer_sink(c->w), "250 OK\n");
168 return 1; /* completed */
171 static int c_enabled(struct conn *c,
172 char attribute((unused)) **vec,
173 int attribute((unused)) nvec) {
174 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[playing_is_enabled()]);
175 return 1; /* completed */
178 static int c_play(struct conn *c, char **vec,
179 int attribute((unused)) nvec) {
181 struct queue_entry *q;
183 if(!trackdb_exists(vec[0])) {
184 sink_writes(ev_writer_sink(c->w), "550 track is not in database\n");
187 if(!(track = trackdb_resolve(vec[0]))) {
188 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
191 q = queue_add(track, c->who, WHERE_BEFORE_RANDOM, origin_picked);
193 /* If we added the first track, and something is playing, then prepare the
194 * new track. If nothing is playing then we don't bother as it wouldn't gain
196 if(q == qhead.next && playing)
198 sink_printf(ev_writer_sink(c->w), "252 %s\n", q->id);
199 /* If the queue was empty but we are for some reason paused then
201 if(!playing) resume_playing(0);
203 return 1; /* completed */
206 static int c_remove(struct conn *c, char **vec,
207 int attribute((unused)) nvec) {
208 struct queue_entry *q;
210 if(!(q = queue_find(vec[0]))) {
211 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
214 if(!right_removable(c->rights, c->who, q)) {
215 error(0, "%s attempted remove but lacks required rights", c->who);
216 sink_writes(ev_writer_sink(c->w),
217 "510 Not authorized to remove that track\n");
220 queue_remove(q, c->who);
221 /* De-prepare the track. */
223 /* See about adding a new random track */
224 add_random_track(c->ev);
225 /* Prepare whatever the next head track is. */
226 if(qhead.next != &qhead)
227 prepare(c->ev, qhead.next);
229 sink_writes(ev_writer_sink(c->w), "250 removed\n");
230 return 1; /* completed */
233 static int c_scratch(struct conn *c,
237 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
238 return 1; /* completed */
240 /* TODO there is a bug here: if we specify an ID but it's not the currently
241 * playing track then you will get 550 if you weren't authorized to scratch
242 * the currently playing track. */
243 if(!right_scratchable(c->rights, c->who, playing)) {
244 error(0, "%s attempted scratch but lacks required rights", c->who);
245 sink_writes(ev_writer_sink(c->w),
246 "510 Not authorized to scratch that track\n");
249 scratch(c->who, nvec == 1 ? vec[0] : 0);
250 /* If you scratch an unpaused track then it is automatically unpaused */
252 sink_writes(ev_writer_sink(c->w), "250 scratched\n");
253 return 1; /* completed */
256 static int c_pause(struct conn *c,
257 char attribute((unused)) **vec,
258 int attribute((unused)) nvec) {
260 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
261 return 1; /* completed */
264 sink_writes(ev_writer_sink(c->w), "250 already paused\n");
265 return 1; /* completed */
267 if(pause_playing(c->who) < 0)
268 sink_writes(ev_writer_sink(c->w), "550 cannot pause this track\n");
270 sink_writes(ev_writer_sink(c->w), "250 paused\n");
274 static int c_resume(struct conn *c,
275 char attribute((unused)) **vec,
276 int attribute((unused)) nvec) {
278 sink_writes(ev_writer_sink(c->w), "250 not paused\n");
279 return 1; /* completed */
281 resume_playing(c->who);
282 sink_writes(ev_writer_sink(c->w), "250 paused\n");
286 static int c_shutdown(struct conn *c,
287 char attribute((unused)) **vec,
288 int attribute((unused)) nvec) {
289 info("S%x shut down by %s", c->tag, c->who);
290 sink_writes(ev_writer_sink(c->w), "250 shutting down\n");
291 ev_writer_flush(c->w);
295 static int c_reconfigure(struct conn *c,
296 char attribute((unused)) **vec,
297 int attribute((unused)) nvec) {
298 info("S%x reconfigure by %s", c->tag, c->who);
299 if(reconfigure(c->ev, 1))
300 sink_writes(ev_writer_sink(c->w), "550 error reading new config\n");
302 sink_writes(ev_writer_sink(c->w), "250 installed new config\n");
303 return 1; /* completed */
306 static void finished_rescan(void *ru) {
307 struct conn *const c = ru;
309 sink_writes(ev_writer_sink(c->w), "250 rescan completed\n");
310 /* Turn this connection back on */
311 ev_reader_enable(c->r);
314 static void start_fresh_rescan(void *ru) {
315 struct conn *const c = ru;
317 if(trackdb_rescan_underway()) {
318 /* Some other waiter beat us to it. However in this case we're happy to
319 * piggyback; the requirement is that a new rescan be started, not that it
320 * was _our_ rescan. */
322 /* We block until the rescan completes */
323 trackdb_add_rescanned(finished_rescan, c);
325 /* We report that the new rescan has started */
326 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
327 /* Turn this connection back on */
328 ev_reader_enable(c->r);
331 /* We are the first connection to get a callback so we must start a
334 /* We want to block until the new rescan completes */
335 trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c);
337 /* We can report back immediately */
338 trackdb_rescan(c->ev, 1/*check*/, 0, 0);
339 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
340 /* Turn this connection back on */
341 ev_reader_enable(c->r);
346 static int c_rescan(struct conn *c,
349 int flag_wait = 0, flag_fresh = 0, n;
352 for(n = 0; n < nvec; ++n) {
353 if(!strcmp(vec[n], "wait"))
354 flag_wait = 1; /* wait for rescan to complete */
356 /* Currently disabled because untested (and hard to test). */
357 else if(!strcmp(vec[n], "fresh"))
358 flag_fresh = 1; /* don't piggyback underway rescan */
361 sink_writes(ev_writer_sink(c->w), "550 unknown flag\n");
362 return 1; /* completed */
365 /* Report what was requested */
366 info("S%x rescan by %s (%s %s)", c->tag, c->who,
367 flag_wait ? "wait" : "",
368 flag_fresh ? "fresh" : "");
369 if(trackdb_rescan_underway()) {
371 /* We want a fresh rescan but there is already one underway. Arrange a
372 * callback when it completes and then set off a new one. */
373 c->rescan_wait = flag_wait;
374 trackdb_add_rescanned(start_fresh_rescan, c);
378 sink_writes(ev_writer_sink(c->w), "250 rescan queued\n");
382 /* There's a rescan underway, and it's acceptable to piggyback on it */
384 /* We want to block until completion. */
385 trackdb_add_rescanned(finished_rescan, c);
388 /* We don't want to block. So we just report that things are in
390 sink_writes(ev_writer_sink(c->w), "250 rescan already underway\n");
395 /* No rescan is underway. fresh is therefore irrelevant. */
397 /* We want to block until completion */
398 trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c);
401 /* We don't want to block. */
402 trackdb_rescan(c->ev, 1/*check*/, 0, 0);
403 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
404 return 1; /* completed */
409 static int c_version(struct conn *c,
410 char attribute((unused)) **vec,
411 int attribute((unused)) nvec) {
412 /* VERSION had better only use the basic character set */
413 sink_printf(ev_writer_sink(c->w), "251 %s\n", disorder_short_version_string);
414 return 1; /* completed */
417 static int c_playing(struct conn *c,
418 char attribute((unused)) **vec,
419 int attribute((unused)) nvec) {
421 queue_fix_sofar(playing);
422 playing->expected = 0;
423 sink_printf(ev_writer_sink(c->w), "252 %s\n", queue_marshall(playing));
425 sink_printf(ev_writer_sink(c->w), "259 nothing playing\n");
426 return 1; /* completed */
429 static const char *connection_host(struct conn *c) {
432 struct sockaddr_in in;
433 struct sockaddr_in6 in6;
439 /* get connection data */
441 if(getpeername(c->fd, &u.sa, &l) < 0) {
442 error(errno, "S%x error calling getpeername", c->tag);
445 if(c->l->pf != PF_UNIX) {
446 if((n = getnameinfo(&u.sa, l,
447 host, sizeof host, 0, 0, NI_NUMERICHOST))) {
448 error(0, "S%x error calling getnameinfo: %s", c->tag, gai_strerror(n));
451 return xstrdup(host);
456 static int c_user(struct conn *c,
458 int attribute((unused)) nvec) {
460 const char *res, *host, *password;
464 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
467 /* get connection data */
468 if(!(host = connection_host(c))) {
469 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
473 k = trackdb_getuserinfo(vec[0]);
474 /* reject nonexistent users */
476 error(0, "S%x unknown user '%s' from %s", c->tag, vec[0], host);
477 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
480 /* reject unconfirmed users */
481 if(kvp_get(k, "confirmation")) {
482 error(0, "S%x unconfirmed user '%s' from %s", c->tag, vec[0], host);
483 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
486 password = kvp_get(k, "password");
487 if(!password) password = "";
488 if(parse_rights(kvp_get(k, "rights"), &rights, 1)) {
489 error(0, "error parsing rights for %s", vec[0]);
490 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
493 /* check whether the response is right */
494 res = authhash(c->nonce, sizeof c->nonce, password,
495 config->authorization_algorithm);
496 if(wideopen || (res && !strcmp(res, vec[1]))) {
499 /* currently we only bother logging remote connections */
500 if(strcmp(host, "local"))
501 info("S%x %s connected from %s", c->tag, vec[0], host);
503 c->rights |= RIGHT__LOCAL;
504 sink_writes(ev_writer_sink(c->w), "230 OK\n");
507 /* oops, response was wrong */
508 info("S%x authentication failure for %s from %s", c->tag, vec[0], host);
509 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
513 static int c_recent(struct conn *c,
514 char attribute((unused)) **vec,
515 int attribute((unused)) nvec) {
516 const struct queue_entry *q;
518 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
519 for(q = phead.next; q != &phead; q = q->next)
520 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
521 sink_writes(ev_writer_sink(c->w), ".\n");
522 return 1; /* completed */
525 static int c_queue(struct conn *c,
526 char attribute((unused)) **vec,
527 int attribute((unused)) nvec) {
528 struct queue_entry *q;
533 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
534 if(playing_is_enabled() && !paused) {
536 queue_fix_sofar(playing);
537 if((l = trackdb_get(playing->track, "_length"))
538 && (length = atol(l))) {
540 when += length - playing->sofar + config->gap;
543 /* Nothing is playing but playing is enabled, so whatever is
544 * first in the queue can be expected to start immediately. */
547 for(q = qhead.next; q != &qhead; q = q->next) {
548 /* fill in estimated start time */
550 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
551 /* update for next track */
553 if((l = trackdb_get(q->track, "_length"))
554 && (length = atol(l)))
555 when += length + config->gap;
560 sink_writes(ev_writer_sink(c->w), ".\n");
561 return 1; /* completed */
564 static int output_list(struct conn *c, char **vec) {
566 sink_printf(ev_writer_sink(c->w), "%s\n", *vec++);
567 sink_writes(ev_writer_sink(c->w), ".\n");
571 static int files_dirs(struct conn *c,
574 enum trackdb_listable what) {
575 const char *dir, *re, *errstr;
581 case 0: dir = 0; re = 0; break;
582 case 1: dir = vec[0]; re = 0; break;
583 case 2: dir = vec[0]; re = vec[1]; break;
586 /* A bit of a bodge to make sure the args don't trample on cache keys */
587 if(dir && strchr(dir, '\n')) {
588 sink_writes(ev_writer_sink(c->w), "550 invalid directory name\n");
591 if(re && strchr(re, '\n')) {
592 sink_writes(ev_writer_sink(c->w), "550 invalid regexp\n");
595 /* We bother eliminating "" because the web interface is relatively
596 * likely to send it */
598 byte_xasprintf(&key, "%d\n%s\n%s", (int)what, dir ? dir : "", re);
599 fvec = (char **)cache_get(&cache_files_type, key);
601 /* Got a cache hit, don't store the answer in the cache */
604 rec = 0; /* quieten compiler */
606 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
608 if(!(rec = pcre_compile(re, PCRE_CASELESS|PCRE_UTF8,
609 &errstr, &erroffset, 0))) {
610 sink_printf(ev_writer_sink(c->w), "550 Error compiling regexp: %s\n",
614 /* It only counts as a miss if the regexp was valid. */
615 ++cache_files_misses;
618 /* No regexp, don't bother caching the result */
624 /* No cache hit (either because a miss, or because we did not look) so do
627 fvec = trackdb_list(dir, 0, what, rec);
629 fvec = trackdb_list(0, 0, what, rec);
632 /* Put the answer in the cache */
633 cache_put(&cache_files_type, key, fvec);
634 sink_writes(ev_writer_sink(c->w), "253 Listing follow\n");
635 return output_list(c, fvec);
638 static int c_files(struct conn *c,
641 return files_dirs(c, vec, nvec, trackdb_files);
644 static int c_dirs(struct conn *c,
647 return files_dirs(c, vec, nvec, trackdb_directories);
650 static int c_allfiles(struct conn *c,
653 return files_dirs(c, vec, nvec, trackdb_directories|trackdb_files);
656 static int c_get(struct conn *c,
658 int attribute((unused)) nvec) {
659 const char *v, *track;
661 if(!(track = trackdb_resolve(vec[0]))) {
662 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
665 if(vec[1][0] != '_' && (v = trackdb_get(track, vec[1])))
666 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v));
668 sink_writes(ev_writer_sink(c->w), "555 not found\n");
672 static int c_length(struct conn *c,
674 int attribute((unused)) nvec) {
675 const char *track, *v;
677 if(!(track = trackdb_resolve(vec[0]))) {
678 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
681 if((v = trackdb_get(track, "_length")))
682 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v));
684 sink_writes(ev_writer_sink(c->w), "550 not found\n");
688 static int c_set(struct conn *c,
690 int attribute((unused)) nvec) {
693 if(!(track = trackdb_resolve(vec[0]))) {
694 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
697 if(vec[1][0] != '_' && !trackdb_set(track, vec[1], vec[2]))
698 sink_writes(ev_writer_sink(c->w), "250 OK\n");
700 sink_writes(ev_writer_sink(c->w), "550 not found\n");
704 static int c_prefs(struct conn *c,
706 int attribute((unused)) nvec) {
710 if(!(track = trackdb_resolve(vec[0]))) {
711 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
714 k = trackdb_get_all(track);
715 sink_writes(ev_writer_sink(c->w), "253 prefs follow\n");
716 for(; k; k = k->next)
717 if(k->name[0] != '_') /* omit internal values */
718 sink_printf(ev_writer_sink(c->w),
719 " %s %s\n", quoteutf8(k->name), quoteutf8(k->value));
720 sink_writes(ev_writer_sink(c->w), ".\n");
724 static int c_exists(struct conn *c,
726 int attribute((unused)) nvec) {
727 /* trackdb_exists() does its own alias checking */
728 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]);
732 static void search_parse_error(const char *msg, void *u) {
733 *(const char **)u = msg;
736 static int c_search(struct conn *c,
738 int attribute((unused)) nvec) {
739 char **terms, **results;
740 int nterms, nresults, n;
741 const char *e = "unknown error";
743 /* This is a bit of a bodge. Initially it's there to make the eclient
744 * interface a bit more convenient to add searching to, but it has the more
745 * compelling advantage that if everything uses it, then interpretation of
746 * user-supplied search strings will be the same everywhere. */
747 if(!(terms = split(vec[0], &nterms, SPLIT_QUOTES, search_parse_error, &e))) {
748 sink_printf(ev_writer_sink(c->w), "550 %s\n", e);
750 results = trackdb_search(terms, nterms, &nresults);
751 sink_printf(ev_writer_sink(c->w), "253 %d matches\n", nresults);
752 for(n = 0; n < nresults; ++n)
753 sink_printf(ev_writer_sink(c->w), "%s\n", results[n]);
754 sink_writes(ev_writer_sink(c->w), ".\n");
759 static int c_random_enable(struct conn *c,
760 char attribute((unused)) **vec,
761 int attribute((unused)) nvec) {
762 enable_random(c->who, c->ev);
763 /* Enable implicitly unpauses if there is nothing playing */
764 if(paused && !playing) resume_playing(c->who);
765 sink_writes(ev_writer_sink(c->w), "250 OK\n");
766 return 1; /* completed */
769 static int c_random_disable(struct conn *c,
770 char attribute((unused)) **vec,
771 int attribute((unused)) nvec) {
772 disable_random(c->who);
773 sink_writes(ev_writer_sink(c->w), "250 OK\n");
774 return 1; /* completed */
777 static int c_random_enabled(struct conn *c,
778 char attribute((unused)) **vec,
779 int attribute((unused)) nvec) {
780 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[random_is_enabled()]);
781 return 1; /* completed */
784 static void got_stats(char *stats, void *u) {
785 struct conn *const c = u;
787 sink_printf(ev_writer_sink(c->w), "253 stats\n%s\n.\n", stats);
788 /* Now we can start processing commands again */
789 ev_reader_enable(c->r);
792 static int c_stats(struct conn *c,
793 char attribute((unused)) **vec,
794 int attribute((unused)) nvec) {
795 trackdb_stats_subprocess(c->ev, got_stats, c);
796 return 0; /* not yet complete */
799 static int c_volume(struct conn *c,
811 l = r = atoi(vec[0]);
822 rights = set ? RIGHT_VOLUME : RIGHT_READ;
823 if(!(c->rights & rights)) {
824 error(0, "%s attempted to set volume but lacks required rights", c->who);
825 sink_writes(ev_writer_sink(c->w), "510 Prohibited\n");
828 if(!api || !api->set_volume) {
829 sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n");
832 (set ? api->set_volume : api->get_volume)(&l, &r);
833 sink_printf(ev_writer_sink(c->w), "252 %d %d\n", l, r);
834 if(l != volume_left || r != volume_right) {
837 snprintf(lb, sizeof lb, "%d", l);
838 snprintf(rb, sizeof rb, "%d", r);
839 eventlog("volume", lb, rb, (char *)0);
844 /** @brief Called when data arrives on a log connection
846 * We just discard all such data. The client may occasionally send data as a
849 static int logging_reader_callback(ev_source attribute((unused)) *ev,
851 void attribute((unused)) *ptr,
853 int attribute((unused)) eof,
854 void attribute((unused)) *u) {
857 ev_reader_consume(reader, bytes);
859 /* Oops, that's all for now */
860 D(("logging reader eof"));
863 ev_writer_close(c->w);
867 remove_connection(c);
872 static void logclient(const char *msg, void *user) {
873 struct conn *c = user;
876 /* This connection has gone up in smoke for some reason */
877 eventlog_remove(c->lo);
881 /* user_* messages are restricted */
882 if(!strncmp(msg, "user_", 5)) {
883 /* They are only sent to admin users */
884 if(!(c->rights & RIGHT_ADMIN))
886 /* They are not sent over TCP connections unless remote user-management is
888 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL))
891 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" %s\n",
892 (uintmax_t)time(0), msg);
895 static int c_log(struct conn *c,
896 char attribute((unused)) **vec,
897 int attribute((unused)) nvec) {
900 sink_writes(ev_writer_sink(c->w), "254 OK\n");
901 /* pump out initial state */
903 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
905 playing_is_enabled() ? "enable_play" : "disable_play");
906 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
908 random_is_enabled() ? "enable_random" : "disable_random");
909 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
911 paused ? "pause" : "resume");
913 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state playing\n",
916 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" volume %d %d\n",
917 (uintmax_t)now, volume_left, volume_right);
918 c->lo = xmalloc(sizeof *c->lo);
919 c->lo->fn = logclient;
922 c->reader = logging_reader_callback;
926 /** @brief Test whether a move is allowed
927 * @param c Connection
928 * @param qs List of IDs on queue
929 * @param nqs Number of IDs
930 * @return 0 if move is prohibited, non-0 if it is allowed
932 static int has_move_rights(struct conn *c, struct queue_entry **qs, int nqs) {
933 for(; nqs > 0; ++qs, --nqs) {
934 struct queue_entry *const q = *qs;
936 if(!right_movable(c->rights, c->who, q))
942 static int c_move(struct conn *c,
944 int attribute((unused)) nvec) {
945 struct queue_entry *q;
948 if(!(q = queue_find(vec[0]))) {
949 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
952 if(!has_move_rights(c, &q, 1)) {
953 error(0, "%s attempted move but lacks required rights", c->who);
954 sink_writes(ev_writer_sink(c->w),
955 "510 Not authorized to move that track\n");
958 n = queue_move(q, atoi(vec[1]), c->who);
959 sink_printf(ev_writer_sink(c->w), "252 %d\n", n);
960 /* If we've moved to the head of the queue then prepare the track. */
966 static int c_moveafter(struct conn *c,
968 int attribute((unused)) nvec) {
969 struct queue_entry *q, **qs;
973 if(!(q = queue_find(vec[0]))) {
974 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
981 qs = xcalloc(nvec, sizeof *qs);
982 for(n = 0; n < nvec; ++n)
983 if(!(qs[n] = queue_find(vec[n]))) {
984 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
987 if(!has_move_rights(c, qs, nvec)) {
988 error(0, "%s attempted moveafter but lacks required rights", c->who);
989 sink_writes(ev_writer_sink(c->w),
990 "510 Not authorized to move those tracks\n");
993 queue_moveafter(q, nvec, qs, c->who);
994 sink_printf(ev_writer_sink(c->w), "250 Moved tracks\n");
995 /* If we've moved to the head of the queue then prepare the track. */
1001 static int c_part(struct conn *c,
1003 int attribute((unused)) nvec) {
1006 if(!(track = trackdb_resolve(vec[0]))) {
1007 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
1010 sink_printf(ev_writer_sink(c->w), "252 %s\n",
1011 quoteutf8(trackdb_getpart(track, vec[1], vec[2])));
1015 static int c_resolve(struct conn *c,
1017 int attribute((unused)) nvec) {
1020 if(!(track = trackdb_resolve(vec[0]))) {
1021 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
1024 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(track));
1028 static int c_tags(struct conn *c,
1029 char attribute((unused)) **vec,
1030 int attribute((unused)) nvec) {
1031 char **tags = trackdb_alltags();
1033 sink_printf(ev_writer_sink(c->w), "253 Tag list follows\n");
1035 sink_printf(ev_writer_sink(c->w), "%s%s\n",
1036 **tags == '.' ? "." : "", *tags);
1039 sink_writes(ev_writer_sink(c->w), ".\n");
1040 return 1; /* completed */
1043 static int c_set_global(struct conn *c,
1045 int attribute((unused)) nvec) {
1046 if(vec[0][0] == '_') {
1047 sink_writes(ev_writer_sink(c->w), "550 cannot set internal global preferences\n");
1050 trackdb_set_global(vec[0], vec[1], c->who);
1051 sink_printf(ev_writer_sink(c->w), "250 OK\n");
1055 static int c_get_global(struct conn *c,
1057 int attribute((unused)) nvec) {
1058 const char *s = trackdb_get_global(vec[0]);
1061 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(s));
1063 sink_writes(ev_writer_sink(c->w), "555 not found\n");
1067 static int c_nop(struct conn *c,
1068 char attribute((unused)) **vec,
1069 int attribute((unused)) nvec) {
1070 sink_printf(ev_writer_sink(c->w), "250 Quack\n");
1074 static int c_new(struct conn *c,
1084 if(max <= 0 || max > config->new_max)
1085 max = config->new_max;
1086 tracks = trackdb_new(0, max);
1087 sink_printf(ev_writer_sink(c->w), "253 New track list follows\n");
1090 sink_printf(ev_writer_sink(c->w), "%s%s\n",
1091 **tracks == '.' ? "." : "", *tracks);
1094 sink_writes(ev_writer_sink(c->w), ".\n");
1095 return 1; /* completed */
1099 static int c_rtp_address(struct conn *c,
1100 char attribute((unused)) **vec,
1101 int attribute((unused)) nvec) {
1102 if(api == &uaudio_rtp) {
1103 sink_printf(ev_writer_sink(c->w), "252 %s %s\n",
1104 quoteutf8(config->broadcast.s[0]),
1105 quoteutf8(config->broadcast.s[1]));
1107 sink_writes(ev_writer_sink(c->w), "550 No RTP\n");
1111 static int c_cookie(struct conn *c,
1113 int attribute((unused)) nvec) {
1118 /* Can't log in twice on the same connection */
1120 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
1123 /* Get some kind of peer identifcation */
1124 if(!(host = connection_host(c))) {
1125 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
1128 /* Check the cookie */
1129 user = verify_cookie(vec[0], &rights);
1131 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
1138 if(strcmp(host, "local"))
1139 info("S%x %s connected with cookie from %s", c->tag, user, host);
1141 c->rights |= RIGHT__LOCAL;
1142 /* Response contains username so client knows who they are acting as */
1143 sink_printf(ev_writer_sink(c->w), "232 %s\n", quoteutf8(user));
1147 static int c_make_cookie(struct conn *c,
1148 char attribute((unused)) **vec,
1149 int attribute((unused)) nvec) {
1150 const char *cookie = make_cookie(c->who);
1153 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(cookie));
1155 sink_writes(ev_writer_sink(c->w), "550 Cannot create cookie\n");
1159 static int c_revoke(struct conn *c,
1160 char attribute((unused)) **vec,
1161 int attribute((unused)) nvec) {
1163 revoke_cookie(c->cookie);
1164 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1166 sink_writes(ev_writer_sink(c->w), "550 Did not log in with cookie\n");
1170 static int c_adduser(struct conn *c,
1175 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
1176 error(0, "S%x: remote adduser", c->tag);
1177 sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
1182 if(parse_rights(vec[2], 0, 1)) {
1183 sink_writes(ev_writer_sink(c->w), "550 Invalid rights list\n");
1187 rights = config->default_rights;
1188 if(trackdb_adduser(vec[0], vec[1], rights,
1189 0/*email*/, 0/*confirmation*/))
1190 sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
1192 sink_writes(ev_writer_sink(c->w), "250 User created\n");
1196 static int c_deluser(struct conn *c,
1198 int attribute((unused)) nvec) {
1201 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
1202 error(0, "S%x: remote deluser", c->tag);
1203 sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
1206 if(trackdb_deluser(vec[0])) {
1207 sink_writes(ev_writer_sink(c->w), "550 Cannot delete user\n");
1210 /* Zap connections belonging to deleted user */
1211 for(d = connections; d; d = d->next)
1212 if(!strcmp(d->who, vec[0]))
1214 sink_writes(ev_writer_sink(c->w), "250 User deleted\n");
1218 static int c_edituser(struct conn *c,
1220 int attribute((unused)) nvec) {
1223 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
1224 error(0, "S%x: remote edituser", c->tag);
1225 sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
1228 /* RIGHT_ADMIN can do anything; otherwise you can only set your own email
1229 * address and password. */
1230 if((c->rights & RIGHT_ADMIN)
1231 || (!strcmp(c->who, vec[0])
1232 && (!strcmp(vec[1], "email")
1233 || !strcmp(vec[1], "password")))) {
1234 if(trackdb_edituserinfo(vec[0], vec[1], vec[2])) {
1235 sink_writes(ev_writer_sink(c->w), "550 Failed to change setting\n");
1238 if(!strcmp(vec[1], "password")) {
1239 /* Zap all connections for this user after a password change */
1240 for(d = connections; d; d = d->next)
1241 if(!strcmp(d->who, vec[0]))
1243 } else if(!strcmp(vec[1], "rights")) {
1244 /* Update rights for this user */
1247 if(!parse_rights(vec[2], &r, 1)) {
1248 const char *new_rights = rights_string(r);
1249 for(d = connections; d; d = d->next) {
1250 if(!strcmp(d->who, vec[0])) {
1253 /* Notify any log connections */
1255 sink_printf(ev_writer_sink(d->w),
1256 "%"PRIxMAX" rights_changed %s\n",
1258 quoteutf8(new_rights));
1263 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1265 error(0, "%s attempted edituser but lacks required rights", c->who);
1266 sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n");
1271 static int c_userinfo(struct conn *c,
1272 char attribute((unused)) **vec,
1273 int attribute((unused)) nvec) {
1277 /* We allow remote querying of rights so that clients can figure out what
1278 * they're allowed to do */
1279 if(!config->remote_userman
1280 && !(c->rights & RIGHT__LOCAL)
1281 && strcmp(vec[1], "rights")) {
1282 error(0, "S%x: remote userinfo %s %s", c->tag, vec[0], vec[1]);
1283 sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
1286 /* RIGHT_ADMIN allows anything; otherwise you can only get your own email
1287 * address and rights list. */
1288 if((c->rights & RIGHT_ADMIN)
1289 || (!strcmp(c->who, vec[0])
1290 && (!strcmp(vec[1], "email")
1291 || !strcmp(vec[1], "rights")))) {
1292 if((k = trackdb_getuserinfo(vec[0])))
1293 if((value = kvp_get(k, vec[1])))
1294 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(value));
1296 sink_writes(ev_writer_sink(c->w), "555 Not set\n");
1298 sink_writes(ev_writer_sink(c->w), "550 No such user\n");
1300 error(0, "%s attempted userinfo but lacks required rights", c->who);
1301 sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n");
1306 static int c_users(struct conn *c,
1307 char attribute((unused)) **vec,
1308 int attribute((unused)) nvec) {
1309 /* TODO de-dupe with c_tags */
1310 char **users = trackdb_listusers();
1312 sink_writes(ev_writer_sink(c->w), "253 User list follows\n");
1314 sink_printf(ev_writer_sink(c->w), "%s%s\n",
1315 **users == '.' ? "." : "", *users);
1318 sink_writes(ev_writer_sink(c->w), ".\n");
1319 return 1; /* completed */
1322 /** @brief Base64 mapping table for confirmation strings
1324 * This is used with generic_to_base64() and generic_base64(). We cannot use
1325 * the MIME table as that contains '+' and '=' which get quoted when
1326 * URL-encoding. (The CGI still does the URL encoding but it is desirable to
1327 * avoid it being necessary.)
1329 static const char confirm_base64_table[] =
1330 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789/.*";
1332 static int c_register(struct conn *c,
1334 int attribute((unused)) nvec) {
1339 /* The confirmation string is base64(username;nonce) */
1340 bufsize = strlen(vec[0]) + CONFIRM_SIZE + 2;
1341 buf = xmalloc_noptr(bufsize);
1342 offset = byte_snprintf(buf, bufsize, "%s;", vec[0]);
1343 gcry_randomize(buf + offset, CONFIRM_SIZE, GCRY_STRONG_RANDOM);
1344 cs = generic_to_base64((uint8_t *)buf, offset + CONFIRM_SIZE,
1345 confirm_base64_table);
1346 if(trackdb_adduser(vec[0], vec[1], config->default_rights, vec[2], cs))
1347 sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
1349 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(cs));
1353 static int c_confirm(struct conn *c,
1355 int attribute((unused)) nvec) {
1361 /* Get some kind of peer identifcation */
1362 if(!(host = connection_host(c))) {
1363 sink_writes(ev_writer_sink(c->w), "530 Authentication failure\n");
1366 if(!(user = generic_base64(vec[0], &nuser, confirm_base64_table))
1367 || !(sep = memchr(user, ';', nuser))) {
1368 sink_writes(ev_writer_sink(c->w), "550 Malformed confirmation string\n");
1372 if(trackdb_confirm(user, vec[0], &rights))
1373 sink_writes(ev_writer_sink(c->w), "550 Incorrect confirmation string\n");
1378 if(strcmp(host, "local"))
1379 info("S%x %s confirmed from %s", c->tag, user, host);
1381 c->rights |= RIGHT__LOCAL;
1382 /* Response contains username so client knows who they are acting as */
1383 sink_printf(ev_writer_sink(c->w), "232 %s\n", quoteutf8(user));
1388 static int sent_reminder(ev_source attribute((unused)) *ev,
1389 pid_t attribute((unused)) pid,
1391 const struct rusage attribute((unused)) *rusage,
1393 struct conn *const c = u;
1395 /* Tell the client what went down */
1397 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1399 error(0, "reminder subprocess %s", wstat(status));
1400 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1402 /* Re-enable this connection */
1403 ev_reader_enable(c->r);
1407 static int c_reminder(struct conn *c,
1409 int attribute((unused)) nvec) {
1411 const char *password, *email, *text, *encoding, *charset, *content_type;
1416 static hash *last_reminder;
1418 if(!config->mail_sender) {
1419 error(0, "cannot send password reminders because mail_sender not set");
1420 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1423 if(!(k = trackdb_getuserinfo(vec[0]))) {
1424 error(0, "reminder for user '%s' who does not exist", vec[0]);
1425 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1428 if(!(email = kvp_get(k, "email"))
1429 || !email_valid(email)) {
1430 error(0, "user '%s' has no valid email address", vec[0]);
1431 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1434 if(!(password = kvp_get(k, "password"))
1436 error(0, "user '%s' has no password", vec[0]);
1437 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1440 /* Rate-limit reminders. This hash is bounded in size by the number of
1441 * users. If this is actually a problem for anyone then we can periodically
1444 last_reminder = hash_new(sizeof (time_t));
1445 last = hash_find(last_reminder, vec[0]);
1447 if(last && now < *last + config->reminder_interval) {
1448 error(0, "sent a password reminder to '%s' too recently", vec[0]);
1449 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1452 /* Send the reminder */
1453 /* TODO this should be templatized and to some extent merged with
1454 * the code in act_register() */
1455 byte_xasprintf((char **)&text,
1456 "Someone requested that you be sent a reminder of your DisOrder password.\n"
1457 "Your password is:\n"
1460 if(!(text = mime_encode_text(text, &charset, &encoding)))
1461 fatal(0, "cannot encode email");
1462 byte_xasprintf((char **)&content_type, "text/plain;charset=%s",
1463 quote822(charset, 0));
1464 pid = sendmail_subprocess("", config->mail_sender, email,
1465 "DisOrder password reminder",
1466 encoding, content_type, text);
1468 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1471 hash_add(last_reminder, vec[0], &now, HASH_INSERT_OR_REPLACE);
1472 info("sending a passsword reminder to user '%s'", vec[0]);
1473 /* We can only continue when the subprocess finishes */
1474 ev_child(c->ev, pid, 0, sent_reminder, c);
1478 static int c_schedule_list(struct conn *c,
1479 char attribute((unused)) **vec,
1480 int attribute((unused)) nvec) {
1481 char **ids = schedule_list(0);
1482 sink_writes(ev_writer_sink(c->w), "253 ID list follows\n");
1484 sink_printf(ev_writer_sink(c->w), "%s\n", *ids++);
1485 sink_writes(ev_writer_sink(c->w), ".\n");
1486 return 1; /* completed */
1489 static int c_schedule_get(struct conn *c,
1491 int attribute((unused)) nvec) {
1492 struct kvp *actiondata = schedule_get(vec[0]), *k;
1495 sink_writes(ev_writer_sink(c->w), "555 No such event\n");
1496 return 1; /* completed */
1498 /* Scheduled events are public information. Anyone with RIGHT_READ can see
1500 sink_writes(ev_writer_sink(c->w), "253 Event information follows\n");
1501 for(k = actiondata; k; k = k->next)
1502 sink_printf(ev_writer_sink(c->w), " %s %s\n",
1503 quoteutf8(k->name), quoteutf8(k->value));
1504 sink_writes(ev_writer_sink(c->w), ".\n");
1505 return 1; /* completed */
1508 static int c_schedule_del(struct conn *c,
1510 int attribute((unused)) nvec) {
1511 struct kvp *actiondata = schedule_get(vec[0]);
1514 sink_writes(ev_writer_sink(c->w), "555 No such event\n");
1515 return 1; /* completed */
1517 /* If you have admin rights you can delete anything. If you don't then you
1518 * can only delete your own scheduled events. */
1519 if(!(c->rights & RIGHT_ADMIN)) {
1520 const char *who = kvp_get(actiondata, "who");
1522 if(!who || !c->who || strcmp(who, c->who)) {
1523 sink_writes(ev_writer_sink(c->w), "551 Not authorized\n");
1524 return 1; /* completed */
1527 if(schedule_del(vec[0]))
1528 sink_writes(ev_writer_sink(c->w), "550 Could not delete scheduled event\n");
1530 sink_writes(ev_writer_sink(c->w), "250 Deleted\n");
1531 return 1; /* completed */
1534 static int c_schedule_add(struct conn *c,
1537 struct kvp *actiondata = 0;
1540 /* Standard fields */
1541 kvp_set(&actiondata, "who", c->who);
1542 kvp_set(&actiondata, "when", vec[0]);
1543 kvp_set(&actiondata, "priority", vec[1]);
1544 kvp_set(&actiondata, "action", vec[2]);
1545 /* Action-dependent fields */
1546 if(!strcmp(vec[2], "play")) {
1548 sink_writes(ev_writer_sink(c->w), "550 Wrong number of arguments\n");
1551 if(!trackdb_exists(vec[3])) {
1552 sink_writes(ev_writer_sink(c->w), "550 Track is not in database\n");
1555 kvp_set(&actiondata, "track", vec[3]);
1556 } else if(!strcmp(vec[2], "set-global")) {
1557 if(nvec < 4 || nvec > 5) {
1558 sink_writes(ev_writer_sink(c->w), "550 Wrong number of arguments\n");
1561 kvp_set(&actiondata, "key", vec[3]);
1563 kvp_set(&actiondata, "value", vec[4]);
1565 sink_writes(ev_writer_sink(c->w), "550 Unknown action\n");
1568 /* schedule_add() checks user rights */
1569 id = schedule_add(c->ev, actiondata);
1571 sink_writes(ev_writer_sink(c->w), "550 Cannot add scheduled event\n");
1573 sink_printf(ev_writer_sink(c->w), "252 %s\n", id);
1577 static int c_adopt(struct conn *c,
1579 int attribute((unused)) nvec) {
1580 struct queue_entry *q;
1583 sink_writes(ev_writer_sink(c->w), "550 no identity\n");
1586 if(!(q = queue_find(vec[0]))) {
1587 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1590 if(q->origin != origin_random) {
1591 sink_writes(ev_writer_sink(c->w), "550 not a random track\n");
1594 q->origin = origin_adopted;
1595 q->submitter = xstrdup(c->who);
1596 eventlog("adopted", q->id, q->submitter, (char *)0);
1598 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1602 static const struct command {
1603 /** @brief Command name */
1606 /** @brief Minimum number of arguments */
1609 /** @brief Maximum number of arguments */
1612 /** @brief Function to process command */
1613 int (*fn)(struct conn *, char **, int);
1615 /** @brief Rights required to execute command
1617 * 0 means that the command can be issued without logging in. If multiple
1618 * bits are listed here any of those rights will do.
1622 { "adduser", 2, 3, c_adduser, RIGHT_ADMIN|RIGHT__LOCAL },
1623 { "adopt", 1, 1, c_adopt, RIGHT_PLAY },
1624 { "allfiles", 0, 2, c_allfiles, RIGHT_READ },
1625 { "confirm", 1, 1, c_confirm, 0 },
1626 { "cookie", 1, 1, c_cookie, 0 },
1627 { "deluser", 1, 1, c_deluser, RIGHT_ADMIN|RIGHT__LOCAL },
1628 { "dirs", 0, 2, c_dirs, RIGHT_READ },
1629 { "disable", 0, 1, c_disable, RIGHT_GLOBAL_PREFS },
1630 { "edituser", 3, 3, c_edituser, RIGHT_ADMIN|RIGHT_USERINFO },
1631 { "enable", 0, 0, c_enable, RIGHT_GLOBAL_PREFS },
1632 { "enabled", 0, 0, c_enabled, RIGHT_READ },
1633 { "exists", 1, 1, c_exists, RIGHT_READ },
1634 { "files", 0, 2, c_files, RIGHT_READ },
1635 { "get", 2, 2, c_get, RIGHT_READ },
1636 { "get-global", 1, 1, c_get_global, RIGHT_READ },
1637 { "length", 1, 1, c_length, RIGHT_READ },
1638 { "log", 0, 0, c_log, RIGHT_READ },
1639 { "make-cookie", 0, 0, c_make_cookie, RIGHT_READ },
1640 { "move", 2, 2, c_move, RIGHT_MOVE__MASK },
1641 { "moveafter", 1, INT_MAX, c_moveafter, RIGHT_MOVE__MASK },
1642 { "new", 0, 1, c_new, RIGHT_READ },
1643 { "nop", 0, 0, c_nop, 0 },
1644 { "part", 3, 3, c_part, RIGHT_READ },
1645 { "pause", 0, 0, c_pause, RIGHT_PAUSE },
1646 { "play", 1, 1, c_play, RIGHT_PLAY },
1647 { "playing", 0, 0, c_playing, RIGHT_READ },
1648 { "prefs", 1, 1, c_prefs, RIGHT_READ },
1649 { "queue", 0, 0, c_queue, RIGHT_READ },
1650 { "random-disable", 0, 0, c_random_disable, RIGHT_GLOBAL_PREFS },
1651 { "random-enable", 0, 0, c_random_enable, RIGHT_GLOBAL_PREFS },
1652 { "random-enabled", 0, 0, c_random_enabled, RIGHT_READ },
1653 { "recent", 0, 0, c_recent, RIGHT_READ },
1654 { "reconfigure", 0, 0, c_reconfigure, RIGHT_ADMIN },
1655 { "register", 3, 3, c_register, RIGHT_REGISTER|RIGHT__LOCAL },
1656 { "reminder", 1, 1, c_reminder, RIGHT__LOCAL },
1657 { "remove", 1, 1, c_remove, RIGHT_REMOVE__MASK },
1658 { "rescan", 0, INT_MAX, c_rescan, RIGHT_RESCAN },
1659 { "resolve", 1, 1, c_resolve, RIGHT_READ },
1660 { "resume", 0, 0, c_resume, RIGHT_PAUSE },
1661 { "revoke", 0, 0, c_revoke, RIGHT_READ },
1662 { "rtp-address", 0, 0, c_rtp_address, 0 },
1663 { "schedule-add", 3, INT_MAX, c_schedule_add, RIGHT_READ },
1664 { "schedule-del", 1, 1, c_schedule_del, RIGHT_READ },
1665 { "schedule-get", 1, 1, c_schedule_get, RIGHT_READ },
1666 { "schedule-list", 0, 0, c_schedule_list, RIGHT_READ },
1667 { "scratch", 0, 1, c_scratch, RIGHT_SCRATCH__MASK },
1668 { "search", 1, 1, c_search, RIGHT_READ },
1669 { "set", 3, 3, c_set, RIGHT_PREFS, },
1670 { "set-global", 2, 2, c_set_global, RIGHT_GLOBAL_PREFS },
1671 { "shutdown", 0, 0, c_shutdown, RIGHT_ADMIN },
1672 { "stats", 0, 0, c_stats, RIGHT_READ },
1673 { "tags", 0, 0, c_tags, RIGHT_READ },
1674 { "unset", 2, 2, c_set, RIGHT_PREFS },
1675 { "unset-global", 1, 1, c_set_global, RIGHT_GLOBAL_PREFS },
1676 { "user", 2, 2, c_user, 0 },
1677 { "userinfo", 2, 2, c_userinfo, RIGHT_READ },
1678 { "users", 0, 0, c_users, RIGHT_READ },
1679 { "version", 0, 0, c_version, RIGHT_READ },
1680 { "volume", 0, 2, c_volume, RIGHT_READ|RIGHT_VOLUME }
1683 static void command_error(const char *msg, void *u) {
1686 sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg);
1689 /* process a command. Return 1 if complete, 0 if incomplete. */
1690 static int command(struct conn *c, char *line) {
1694 D(("server command %s", line));
1695 /* We force everything into NFC as early as possible */
1696 if(!(line = utf8_compose_canon(line, strlen(line), 0))) {
1697 sink_writes(ev_writer_sink(c->w), "500 cannot normalize command\n");
1700 if(!(vec = split(line, &nvec, SPLIT_QUOTES, command_error, c))) {
1701 sink_writes(ev_writer_sink(c->w), "500 cannot parse command\n");
1705 sink_writes(ev_writer_sink(c->w), "500 do what?\n");
1708 if((n = TABLE_FIND(commands, name, vec[0])) < 0)
1709 sink_writes(ev_writer_sink(c->w), "500 unknown command\n");
1711 if(commands[n].rights
1712 && !(c->rights & commands[n].rights)) {
1713 error(0, "%s attempted %s but lacks required rights", c->who ? c->who : "NULL",
1715 sink_writes(ev_writer_sink(c->w), "510 Prohibited\n");
1720 if(nvec < commands[n].minargs) {
1721 sink_writes(ev_writer_sink(c->w), "500 missing argument(s)\n");
1724 if(nvec > commands[n].maxargs) {
1725 sink_writes(ev_writer_sink(c->w), "500 too many arguments\n");
1728 return commands[n].fn(c, vec, nvec);
1730 return 1; /* completed */
1733 /* redirect to the right reader callback for our current state */
1734 static int redirect_reader_callback(ev_source *ev,
1742 return c->reader(ev, reader, ptr, bytes, eof, u);
1745 /* the main command reader */
1746 static int reader_callback(ev_source attribute((unused)) *ev,
1756 D(("server reader_callback"));
1757 while((eol = memchr(ptr, '\n', bytes))) {
1759 ev_reader_consume(reader, eol - (char *)ptr);
1760 complete = command(c, ptr);
1761 bytes -= (eol - (char *)ptr);
1764 /* the command had better have set a new reader callback */
1766 /* there are further bytes to read, or we are at eof; arrange for the
1767 * command's reader callback to handle them */
1768 return ev_reader_incomplete(reader);
1769 /* nothing's going on right now */
1772 /* command completed, we can go around and handle the next one */
1776 error(0, "S%x unterminated line", c->tag);
1777 D(("normal reader close"));
1780 D(("close associated writer"));
1781 ev_writer_close(c->w);
1784 remove_connection(c);
1789 static int listen_callback(ev_source *ev,
1791 const struct sockaddr attribute((unused)) *remote,
1792 socklen_t attribute((unused)) rlen,
1794 const struct listener *l = u;
1795 struct conn *c = xmalloc(sizeof *c);
1796 static unsigned tags;
1798 D(("server listen_callback fd %d (%s)", fd, l->name));
1801 c->next = connections;
1804 c->w = ev_writer_new(ev, fd, writer_error, c,
1807 error(0, "ev_writer_new for file inbound connection (fd=%d) failed",
1812 c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c,
1815 /* Main reason for failure is the FD is too big and that will already have
1817 fatal(0, "ev_reader_new for file inbound connection (fd=%d) failed", fd);
1820 c->reader = reader_callback;
1824 gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM);
1825 sink_printf(ev_writer_sink(c->w), "231 %d %s %s\n",
1827 config->authorization_algorithm,
1828 hex(c->nonce, sizeof c->nonce));
1832 int server_start(ev_source *ev, int pf,
1833 size_t socklen, const struct sockaddr *sa,
1836 struct listener *l = xmalloc(sizeof *l);
1837 static const int one = 1;
1839 D(("server_init socket %s", name));
1840 fd = xsocket(pf, SOCK_STREAM, 0);
1841 xsetsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
1842 if(bind(fd, sa, socklen) < 0) {
1843 error(errno, "error binding to %s", name);
1851 if(ev_listen(ev, fd, listen_callback, l, "server listener"))
1856 int server_stop(ev_source *ev, int fd) {
1858 return ev_listen_cancel(ev, fd);