2 * This file is part of DisOrder.
3 * Copyright (C) 2004-2008 Richard Kettlewell
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
21 #include "disorder-server.h"
24 # define NONCE_SIZE 16
28 # define CONFIRM_SIZE 10
31 int volume_left, volume_right; /* last known volume */
33 /** @brief Accept all well-formed login attempts
44 /** @brief One client connection */
46 /** @brief Read commands from here */
48 /** @brief Send responses to here */
50 /** @brief Underlying file descriptor */
52 /** @brief Unique identifier for connection used in log messages */
54 /** @brief Login name or NULL */
56 /** @brief Event loop */
58 /** @brief Nonce chosen for this connection */
59 unsigned char nonce[NONCE_SIZE];
60 /** @brief Current reader callback
62 * We change this depending on whether we're servicing the @b log command
64 ev_reader_callback *reader;
65 /** @brief Event log output sending to this connection */
66 struct eventlog_output *lo;
67 /** @brief Parent listener */
68 const struct listener *l;
69 /** @brief Login cookie or NULL */
71 /** @brief Connection rights */
73 /** @brief Next connection */
75 /** @brief True if pending rescan had 'wait' set */
79 /** @brief Linked list of connections */
80 static struct conn *connections;
82 static int reader_callback(ev_source *ev,
89 static const char *noyes[] = { "no", "yes" };
91 /** @brief Remove a connection from the connection list */
92 static void remove_connection(struct conn *c) {
95 for(cc = &connections; *cc && *cc != c; cc = &(*cc)->next)
101 /** @brief Called when a connection's writer fails or is shut down
103 * If the connection still has a raeder that is cancelled.
105 static int writer_error(ev_source attribute((unused)) *ev,
110 D(("server writer_error S%x %d", c->tag, errno_value));
111 if(errno_value == 0) {
113 D(("S%x writer completed", c->tag));
115 if(errno_value != EPIPE)
116 error(errno_value, "S%x write error on socket", c->tag);
118 D(("cancel reader"));
119 ev_reader_cancel(c->r);
122 D(("done cancel reader"));
126 remove_connection(c);
130 /** @brief Called when a conncetion's reader fails or is shut down
132 * If connection still has a writer then it is closed.
134 static int reader_error(ev_source attribute((unused)) *ev,
139 D(("server reader_error S%x %d", c->tag, errno_value));
140 error(errno_value, "S%x read error on socket", c->tag);
142 ev_writer_close(c->w);
146 remove_connection(c);
150 static int c_disable(struct conn *c, char **vec, int nvec) {
152 disable_playing(c->who);
153 else if(nvec == 1 && !strcmp(vec[0], "now"))
154 disable_playing(c->who);
156 sink_writes(ev_writer_sink(c->w), "550 invalid argument\n");
157 return 1; /* completed */
159 sink_writes(ev_writer_sink(c->w), "250 OK\n");
160 return 1; /* completed */
163 static int c_enable(struct conn *c,
164 char attribute((unused)) **vec,
165 int attribute((unused)) nvec) {
166 enable_playing(c->who, c->ev);
167 /* Enable implicitly unpauses if there is nothing playing */
168 if(paused && !playing) resume_playing(c->who);
169 sink_writes(ev_writer_sink(c->w), "250 OK\n");
170 return 1; /* completed */
173 static int c_enabled(struct conn *c,
174 char attribute((unused)) **vec,
175 int attribute((unused)) nvec) {
176 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[playing_is_enabled()]);
177 return 1; /* completed */
180 static int c_play(struct conn *c, char **vec,
181 int attribute((unused)) nvec) {
183 struct queue_entry *q;
185 if(!trackdb_exists(vec[0])) {
186 sink_writes(ev_writer_sink(c->w), "550 track is not in database\n");
189 if(!(track = trackdb_resolve(vec[0]))) {
190 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
193 q = queue_add(track, c->who, WHERE_BEFORE_RANDOM);
195 /* If we added the first track, and something is playing, then prepare the
196 * new track. If nothing is playing then we don't bother as it wouldn't gain
198 if(q == qhead.next && playing)
200 sink_printf(ev_writer_sink(c->w), "252 %s\n", q->id);
201 /* If the queue was empty but we are for some reason paused then
203 if(!playing) resume_playing(0);
205 return 1; /* completed */
208 static int c_remove(struct conn *c, char **vec,
209 int attribute((unused)) nvec) {
210 struct queue_entry *q;
212 if(!(q = queue_find(vec[0]))) {
213 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
216 if(!right_removable(c->rights, c->who, q)) {
217 error(0, "%s attempted remove but lacks required rights", c->who);
218 sink_writes(ev_writer_sink(c->w),
219 "510 Not authorized to remove that track\n");
222 queue_remove(q, c->who);
223 /* De-prepare the track. */
225 /* See about adding a new random track */
226 add_random_track(c->ev);
227 /* Prepare whatever the next head track is. */
228 if(qhead.next != &qhead)
229 prepare(c->ev, qhead.next);
231 sink_writes(ev_writer_sink(c->w), "250 removed\n");
232 return 1; /* completed */
235 static int c_scratch(struct conn *c,
239 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
240 return 1; /* completed */
242 /* TODO there is a bug here: if we specify an ID but it's not the currently
243 * playing track then you will get 550 if you weren't authorized to scratch
244 * the currently playing track. */
245 if(!right_scratchable(c->rights, c->who, playing)) {
246 error(0, "%s attempted scratch but lacks required rights", c->who);
247 sink_writes(ev_writer_sink(c->w),
248 "510 Not authorized to scratch that track\n");
251 scratch(c->who, nvec == 1 ? vec[0] : 0);
252 /* If you scratch an unpaused track then it is automatically unpaused */
254 sink_writes(ev_writer_sink(c->w), "250 scratched\n");
255 return 1; /* completed */
258 static int c_pause(struct conn *c,
259 char attribute((unused)) **vec,
260 int attribute((unused)) nvec) {
262 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
263 return 1; /* completed */
266 sink_writes(ev_writer_sink(c->w), "250 already paused\n");
267 return 1; /* completed */
269 if(pause_playing(c->who) < 0)
270 sink_writes(ev_writer_sink(c->w), "550 cannot pause this track\n");
272 sink_writes(ev_writer_sink(c->w), "250 paused\n");
276 static int c_resume(struct conn *c,
277 char attribute((unused)) **vec,
278 int attribute((unused)) nvec) {
280 sink_writes(ev_writer_sink(c->w), "250 not paused\n");
281 return 1; /* completed */
283 resume_playing(c->who);
284 sink_writes(ev_writer_sink(c->w), "250 paused\n");
288 static int c_shutdown(struct conn *c,
289 char attribute((unused)) **vec,
290 int attribute((unused)) nvec) {
291 info("S%x shut down by %s", c->tag, c->who);
292 sink_writes(ev_writer_sink(c->w), "250 shutting down\n");
293 ev_writer_flush(c->w);
297 static int c_reconfigure(struct conn *c,
298 char attribute((unused)) **vec,
299 int attribute((unused)) nvec) {
300 info("S%x reconfigure by %s", c->tag, c->who);
301 if(reconfigure(c->ev, 1))
302 sink_writes(ev_writer_sink(c->w), "550 error reading new config\n");
304 sink_writes(ev_writer_sink(c->w), "250 installed new config\n");
305 return 1; /* completed */
308 static void finished_rescan(void *ru) {
309 struct conn *const c = ru;
311 sink_writes(ev_writer_sink(c->w), "250 rescan completed\n");
312 /* Turn this connection back on */
313 ev_reader_enable(c->r);
316 static void start_fresh_rescan(void *ru) {
317 struct conn *const c = ru;
319 if(trackdb_rescan_underway()) {
320 /* Some other waiter beat us to it. However in this case we're happy to
321 * piggyback; the requirement is that a new rescan be started, not that it
322 * was _our_ rescan. */
324 /* We block until the rescan completes */
325 trackdb_add_rescanned(finished_rescan, c);
327 /* We report that the new rescan has started */
328 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
329 /* Turn this connection back on */
330 ev_reader_enable(c->r);
333 /* We are the first connection to get a callback so we must start a
336 /* We want to block until the new rescan completes */
337 trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c);
339 /* We can report back immediately */
340 trackdb_rescan(c->ev, 1/*check*/, 0, 0);
341 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
342 /* Turn this connection back on */
343 ev_reader_enable(c->r);
348 static int c_rescan(struct conn *c,
351 int flag_wait = 0, flag_fresh = 0, n;
354 for(n = 0; n < nvec; ++n) {
355 if(!strcmp(vec[n], "wait"))
356 flag_wait = 1; /* wait for rescan to complete */
358 /* Currently disabled because untested (and hard to test). */
359 else if(!strcmp(vec[n], "fresh"))
360 flag_fresh = 1; /* don't piggyback underway rescan */
363 sink_writes(ev_writer_sink(c->w), "550 unknown flag\n");
364 return 1; /* completed */
367 /* Report what was requested */
368 info("S%x rescan by %s (%s %s)", c->tag, c->who,
369 flag_wait ? "wait" : "",
370 flag_fresh ? "fresh" : "");
371 if(trackdb_rescan_underway()) {
373 /* We want a fresh rescan but there is already one underway. Arrange a
374 * callback when it completes and then set off a new one. */
375 c->rescan_wait = flag_wait;
376 trackdb_add_rescanned(start_fresh_rescan, c);
380 sink_writes(ev_writer_sink(c->w), "250 rescan queued\n");
384 /* There's a rescan underway, and it's acceptable to piggyback on it */
386 /* We want to block until completion. */
387 trackdb_add_rescanned(finished_rescan, c);
390 /* We don't want to block. So we just report that things are in
392 sink_writes(ev_writer_sink(c->w), "250 rescan already underway\n");
397 /* No rescan is underway. fresh is therefore irrelevant. */
399 /* We want to block until completion */
400 trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c);
403 /* We don't want to block. */
404 trackdb_rescan(c->ev, 1/*check*/, 0, 0);
405 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
406 return 1; /* completed */
411 static int c_version(struct conn *c,
412 char attribute((unused)) **vec,
413 int attribute((unused)) nvec) {
414 /* VERSION had better only use the basic character set */
415 sink_printf(ev_writer_sink(c->w), "251 %s\n", disorder_short_version_string);
416 return 1; /* completed */
419 static int c_playing(struct conn *c,
420 char attribute((unused)) **vec,
421 int attribute((unused)) nvec) {
423 queue_fix_sofar(playing);
424 playing->expected = 0;
425 sink_printf(ev_writer_sink(c->w), "252 %s\n", queue_marshall(playing));
427 sink_printf(ev_writer_sink(c->w), "259 nothing playing\n");
428 return 1; /* completed */
431 static const char *connection_host(struct conn *c) {
434 struct sockaddr_in in;
435 struct sockaddr_in6 in6;
441 /* get connection data */
443 if(getpeername(c->fd, &u.sa, &l) < 0) {
444 error(errno, "S%x error calling getpeername", c->tag);
447 if(c->l->pf != PF_UNIX) {
448 if((n = getnameinfo(&u.sa, l,
449 host, sizeof host, 0, 0, NI_NUMERICHOST))) {
450 error(0, "S%x error calling getnameinfo: %s", c->tag, gai_strerror(n));
453 return xstrdup(host);
458 static int c_user(struct conn *c,
460 int attribute((unused)) nvec) {
462 const char *res, *host, *password;
466 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
469 /* get connection data */
470 if(!(host = connection_host(c))) {
471 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
475 k = trackdb_getuserinfo(vec[0]);
476 /* reject nonexistent users */
478 error(0, "S%x unknown user '%s' from %s", c->tag, vec[0], host);
479 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
482 /* reject unconfirmed users */
483 if(kvp_get(k, "confirmation")) {
484 error(0, "S%x unconfirmed user '%s' from %s", c->tag, vec[0], host);
485 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
488 password = kvp_get(k, "password");
489 if(!password) password = "";
490 if(parse_rights(kvp_get(k, "rights"), &rights, 1)) {
491 error(0, "error parsing rights for %s", vec[0]);
492 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
495 /* check whether the response is right */
496 res = authhash(c->nonce, sizeof c->nonce, password,
497 config->authorization_algorithm);
498 if(wideopen || (res && !strcmp(res, vec[1]))) {
501 /* currently we only bother logging remote connections */
502 if(strcmp(host, "local"))
503 info("S%x %s connected from %s", c->tag, vec[0], host);
505 c->rights |= RIGHT__LOCAL;
506 sink_writes(ev_writer_sink(c->w), "230 OK\n");
509 /* oops, response was wrong */
510 info("S%x authentication failure for %s from %s", c->tag, vec[0], host);
511 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
515 static int c_recent(struct conn *c,
516 char attribute((unused)) **vec,
517 int attribute((unused)) nvec) {
518 const struct queue_entry *q;
520 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
521 for(q = phead.next; q != &phead; q = q->next)
522 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
523 sink_writes(ev_writer_sink(c->w), ".\n");
524 return 1; /* completed */
527 static int c_queue(struct conn *c,
528 char attribute((unused)) **vec,
529 int attribute((unused)) nvec) {
530 struct queue_entry *q;
535 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
536 if(playing_is_enabled() && !paused) {
538 queue_fix_sofar(playing);
539 if((l = trackdb_get(playing->track, "_length"))
540 && (length = atol(l))) {
542 when += length - playing->sofar + config->gap;
545 /* Nothing is playing but playing is enabled, so whatever is
546 * first in the queue can be expected to start immediately. */
549 for(q = qhead.next; q != &qhead; q = q->next) {
550 /* fill in estimated start time */
552 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
553 /* update for next track */
555 if((l = trackdb_get(q->track, "_length"))
556 && (length = atol(l)))
557 when += length + config->gap;
562 sink_writes(ev_writer_sink(c->w), ".\n");
563 return 1; /* completed */
566 static int output_list(struct conn *c, char **vec) {
568 sink_printf(ev_writer_sink(c->w), "%s\n", *vec++);
569 sink_writes(ev_writer_sink(c->w), ".\n");
573 static int files_dirs(struct conn *c,
576 enum trackdb_listable what) {
577 const char *dir, *re, *errstr;
583 case 0: dir = 0; re = 0; break;
584 case 1: dir = vec[0]; re = 0; break;
585 case 2: dir = vec[0]; re = vec[1]; break;
588 /* A bit of a bodge to make sure the args don't trample on cache keys */
589 if(dir && strchr(dir, '\n')) {
590 sink_writes(ev_writer_sink(c->w), "550 invalid directory name\n");
593 if(re && strchr(re, '\n')) {
594 sink_writes(ev_writer_sink(c->w), "550 invalid regexp\n");
597 /* We bother eliminating "" because the web interface is relatively
598 * likely to send it */
600 byte_xasprintf(&key, "%d\n%s\n%s", (int)what, dir ? dir : "", re);
601 fvec = (char **)cache_get(&cache_files_type, key);
603 /* Got a cache hit, don't store the answer in the cache */
606 rec = 0; /* quieten compiler */
608 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
610 if(!(rec = pcre_compile(re, PCRE_CASELESS|PCRE_UTF8,
611 &errstr, &erroffset, 0))) {
612 sink_printf(ev_writer_sink(c->w), "550 Error compiling regexp: %s\n",
616 /* It only counts as a miss if the regexp was valid. */
617 ++cache_files_misses;
620 /* No regexp, don't bother caching the result */
626 /* No cache hit (either because a miss, or because we did not look) so do
629 fvec = trackdb_list(dir, 0, what, rec);
631 fvec = trackdb_list(0, 0, what, rec);
634 /* Put the answer in the cache */
635 cache_put(&cache_files_type, key, fvec);
636 sink_writes(ev_writer_sink(c->w), "253 Listing follow\n");
637 return output_list(c, fvec);
640 static int c_files(struct conn *c,
643 return files_dirs(c, vec, nvec, trackdb_files);
646 static int c_dirs(struct conn *c,
649 return files_dirs(c, vec, nvec, trackdb_directories);
652 static int c_allfiles(struct conn *c,
655 return files_dirs(c, vec, nvec, trackdb_directories|trackdb_files);
658 static int c_get(struct conn *c,
660 int attribute((unused)) nvec) {
661 const char *v, *track;
663 if(!(track = trackdb_resolve(vec[0]))) {
664 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
667 if(vec[1][0] != '_' && (v = trackdb_get(track, vec[1])))
668 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v));
670 sink_writes(ev_writer_sink(c->w), "555 not found\n");
674 static int c_length(struct conn *c,
676 int attribute((unused)) nvec) {
677 const char *track, *v;
679 if(!(track = trackdb_resolve(vec[0]))) {
680 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
683 if((v = trackdb_get(track, "_length")))
684 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v));
686 sink_writes(ev_writer_sink(c->w), "550 not found\n");
690 static int c_set(struct conn *c,
692 int attribute((unused)) nvec) {
695 if(!(track = trackdb_resolve(vec[0]))) {
696 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
699 if(vec[1][0] != '_' && !trackdb_set(track, vec[1], vec[2]))
700 sink_writes(ev_writer_sink(c->w), "250 OK\n");
702 sink_writes(ev_writer_sink(c->w), "550 not found\n");
706 static int c_prefs(struct conn *c,
708 int attribute((unused)) nvec) {
712 if(!(track = trackdb_resolve(vec[0]))) {
713 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
716 k = trackdb_get_all(track);
717 sink_writes(ev_writer_sink(c->w), "253 prefs follow\n");
718 for(; k; k = k->next)
719 if(k->name[0] != '_') /* omit internal values */
720 sink_printf(ev_writer_sink(c->w),
721 " %s %s\n", quoteutf8(k->name), quoteutf8(k->value));
722 sink_writes(ev_writer_sink(c->w), ".\n");
726 static int c_exists(struct conn *c,
728 int attribute((unused)) nvec) {
729 /* trackdb_exists() does its own alias checking */
730 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]);
734 static void search_parse_error(const char *msg, void *u) {
735 *(const char **)u = msg;
738 static int c_search(struct conn *c,
740 int attribute((unused)) nvec) {
741 char **terms, **results;
742 int nterms, nresults, n;
743 const char *e = "unknown error";
745 /* This is a bit of a bodge. Initially it's there to make the eclient
746 * interface a bit more convenient to add searching to, but it has the more
747 * compelling advantage that if everything uses it, then interpretation of
748 * user-supplied search strings will be the same everywhere. */
749 if(!(terms = split(vec[0], &nterms, SPLIT_QUOTES, search_parse_error, &e))) {
750 sink_printf(ev_writer_sink(c->w), "550 %s\n", e);
752 results = trackdb_search(terms, nterms, &nresults);
753 sink_printf(ev_writer_sink(c->w), "253 %d matches\n", nresults);
754 for(n = 0; n < nresults; ++n)
755 sink_printf(ev_writer_sink(c->w), "%s\n", results[n]);
756 sink_writes(ev_writer_sink(c->w), ".\n");
761 static int c_random_enable(struct conn *c,
762 char attribute((unused)) **vec,
763 int attribute((unused)) nvec) {
764 enable_random(c->who, c->ev);
765 /* Enable implicitly unpauses if there is nothing playing */
766 if(paused && !playing) resume_playing(c->who);
767 sink_writes(ev_writer_sink(c->w), "250 OK\n");
768 return 1; /* completed */
771 static int c_random_disable(struct conn *c,
772 char attribute((unused)) **vec,
773 int attribute((unused)) nvec) {
774 disable_random(c->who);
775 sink_writes(ev_writer_sink(c->w), "250 OK\n");
776 return 1; /* completed */
779 static int c_random_enabled(struct conn *c,
780 char attribute((unused)) **vec,
781 int attribute((unused)) nvec) {
782 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[random_is_enabled()]);
783 return 1; /* completed */
786 static void got_stats(char *stats, void *u) {
787 struct conn *const c = u;
789 sink_printf(ev_writer_sink(c->w), "253 stats\n%s\n.\n", stats);
790 /* Now we can start processing commands again */
791 ev_reader_enable(c->r);
794 static int c_stats(struct conn *c,
795 char attribute((unused)) **vec,
796 int attribute((unused)) nvec) {
797 trackdb_stats_subprocess(c->ev, got_stats, c);
798 return 0; /* not yet complete */
801 static int c_volume(struct conn *c,
813 l = r = atoi(vec[0]);
824 rights = set ? RIGHT_VOLUME : RIGHT_READ;
825 if(!(c->rights & rights)) {
826 error(0, "%s attempted to set volume but lacks required rights", c->who);
827 sink_writes(ev_writer_sink(c->w), "510 Prohibited\n");
830 if(mixer_control(-1/*as configured*/, &l, &r, set))
831 sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n");
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);
845 /** @brief Called when data arrives on a log connection
847 * We just discard all such data. The client may occasionally send data as a
850 static int logging_reader_callback(ev_source attribute((unused)) *ev,
852 void attribute((unused)) *ptr,
854 int attribute((unused)) eof,
855 void attribute((unused)) *u) {
858 ev_reader_consume(reader, bytes);
860 /* Oops, that's all for now */
861 D(("logging reader eof"));
864 ev_writer_close(c->w);
868 remove_connection(c);
873 static void logclient(const char *msg, void *user) {
874 struct conn *c = user;
877 /* This connection has gone up in smoke for some reason */
878 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(config->api == BACKEND_NETWORK) {
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 for(d = connections; d; d = d->next)
1249 if(!strcmp(d->who, vec[0]))
1252 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1254 error(0, "%s attempted edituser but lacks required rights", c->who);
1255 sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n");
1260 static int c_userinfo(struct conn *c,
1261 char attribute((unused)) **vec,
1262 int attribute((unused)) nvec) {
1266 /* We allow remote querying of rights so that clients can figure out what
1267 * they're allowed to do */
1268 if(!config->remote_userman
1269 && !(c->rights & RIGHT__LOCAL)
1270 && strcmp(vec[1], "rights")) {
1271 error(0, "S%x: remote userinfo %s %s", c->tag, vec[0], vec[1]);
1272 sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
1275 /* RIGHT_ADMIN allows anything; otherwise you can only get your own email
1276 * address and rights list. */
1277 if((c->rights & RIGHT_ADMIN)
1278 || (!strcmp(c->who, vec[0])
1279 && (!strcmp(vec[1], "email")
1280 || !strcmp(vec[1], "rights")))) {
1281 if((k = trackdb_getuserinfo(vec[0])))
1282 if((value = kvp_get(k, vec[1])))
1283 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(value));
1285 sink_writes(ev_writer_sink(c->w), "555 Not set\n");
1287 sink_writes(ev_writer_sink(c->w), "550 No such user\n");
1289 error(0, "%s attempted userinfo but lacks required rights", c->who);
1290 sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n");
1295 static int c_users(struct conn *c,
1296 char attribute((unused)) **vec,
1297 int attribute((unused)) nvec) {
1298 /* TODO de-dupe with c_tags */
1299 char **users = trackdb_listusers();
1301 sink_writes(ev_writer_sink(c->w), "253 User list follows\n");
1303 sink_printf(ev_writer_sink(c->w), "%s%s\n",
1304 **users == '.' ? "." : "", *users);
1307 sink_writes(ev_writer_sink(c->w), ".\n");
1308 return 1; /* completed */
1311 /** @brief Base64 mapping table for confirmation strings
1313 * This is used with generic_to_base64() and generic_base64(). We cannot use
1314 * the MIME table as that contains '+' and '=' which get quoted when
1315 * URL-encoding. (The CGI still does the URL encoding but it is desirable to
1316 * avoid it being necessary.)
1318 static const char confirm_base64_table[] =
1319 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789/.*";
1321 static int c_register(struct conn *c,
1323 int attribute((unused)) nvec) {
1328 /* The confirmation string is base64(username;nonce) */
1329 bufsize = strlen(vec[0]) + CONFIRM_SIZE + 2;
1330 buf = xmalloc_noptr(bufsize);
1331 offset = byte_snprintf(buf, bufsize, "%s;", vec[0]);
1332 gcry_randomize(buf + offset, CONFIRM_SIZE, GCRY_STRONG_RANDOM);
1333 cs = generic_to_base64((uint8_t *)buf, offset + CONFIRM_SIZE,
1334 confirm_base64_table);
1335 if(trackdb_adduser(vec[0], vec[1], config->default_rights, vec[2], cs))
1336 sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
1338 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(cs));
1342 static int c_confirm(struct conn *c,
1344 int attribute((unused)) nvec) {
1350 /* Get some kind of peer identifcation */
1351 if(!(host = connection_host(c))) {
1352 sink_writes(ev_writer_sink(c->w), "530 Authentication failure\n");
1355 if(!(user = generic_base64(vec[0], &nuser, confirm_base64_table))
1356 || !(sep = memchr(user, ';', nuser))) {
1357 sink_writes(ev_writer_sink(c->w), "550 Malformed confirmation string\n");
1361 if(trackdb_confirm(user, vec[0], &rights))
1362 sink_writes(ev_writer_sink(c->w), "550 Incorrect confirmation string\n");
1367 if(strcmp(host, "local"))
1368 info("S%x %s confirmed from %s", c->tag, user, host);
1370 c->rights |= RIGHT__LOCAL;
1371 /* Response contains username so client knows who they are acting as */
1372 sink_printf(ev_writer_sink(c->w), "232 %s\n", quoteutf8(user));
1377 static int sent_reminder(ev_source attribute((unused)) *ev,
1378 pid_t attribute((unused)) pid,
1380 const struct rusage attribute((unused)) *rusage,
1382 struct conn *const c = u;
1384 /* Tell the client what went down */
1386 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1388 error(0, "reminder subprocess %s", wstat(status));
1389 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1391 /* Re-enable this connection */
1392 ev_reader_enable(c->r);
1396 static int c_reminder(struct conn *c,
1398 int attribute((unused)) nvec) {
1400 const char *password, *email, *text, *encoding, *charset, *content_type;
1405 static hash *last_reminder;
1407 if(!config->mail_sender) {
1408 error(0, "cannot send password reminders because mail_sender not set");
1409 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1412 if(!(k = trackdb_getuserinfo(vec[0]))) {
1413 error(0, "reminder for user '%s' who does not exist", vec[0]);
1414 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1417 /* TODO use email_valid() */
1418 if(!(email = kvp_get(k, "email"))
1419 || !strchr(email, '@')) {
1420 error(0, "user '%s' has no valid email address", vec[0]);
1421 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1424 if(!(password = kvp_get(k, "password"))
1426 error(0, "user '%s' has no password", vec[0]);
1427 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1430 /* Rate-limit reminders. This hash is bounded in size by the number of
1431 * users. If this is actually a problem for anyone then we can periodically
1434 last_reminder = hash_new(sizeof (time_t));
1435 last = hash_find(last_reminder, vec[0]);
1437 if(last && now < *last + config->reminder_interval) {
1438 error(0, "sent a password reminder to '%s' too recently", vec[0]);
1439 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1442 /* Send the reminder */
1443 /* TODO this should be templatized and to some extent merged with
1444 * the code in act_register() */
1445 byte_xasprintf((char **)&text,
1446 "Someone requested that you be sent a reminder of your DisOrder password.\n"
1447 "Your password is:\n"
1450 if(!(text = mime_encode_text(text, &charset, &encoding)))
1451 fatal(0, "cannot encode email");
1452 byte_xasprintf((char **)&content_type, "text/plain;charset=%s",
1453 quote822(charset, 0));
1454 pid = sendmail_subprocess("", config->mail_sender, email,
1455 "DisOrder password reminder",
1456 encoding, content_type, text);
1458 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1461 hash_add(last_reminder, vec[0], &now, HASH_INSERT_OR_REPLACE);
1462 info("sending a passsword reminder to user '%s'", vec[0]);
1463 /* We can only continue when the subprocess finishes */
1464 ev_child(c->ev, pid, 0, sent_reminder, c);
1468 static int c_schedule_list(struct conn *c,
1469 char attribute((unused)) **vec,
1470 int attribute((unused)) nvec) {
1471 char **ids = schedule_list(0);
1472 sink_writes(ev_writer_sink(c->w), "253 ID list follows\n");
1474 sink_printf(ev_writer_sink(c->w), "%s\n", *ids++);
1475 sink_writes(ev_writer_sink(c->w), ".\n");
1476 return 1; /* completed */
1479 static int c_schedule_get(struct conn *c,
1481 int attribute((unused)) nvec) {
1482 struct kvp *actiondata = schedule_get(vec[0]), *k;
1485 sink_writes(ev_writer_sink(c->w), "555 No such event\n");
1486 return 1; /* completed */
1488 /* Scheduled events are public information. Anyone with RIGHT_READ can see
1490 sink_writes(ev_writer_sink(c->w), "253 Event information follows\n");
1491 for(k = actiondata; k; k = k->next)
1492 sink_printf(ev_writer_sink(c->w), " %s %s\n",
1493 quoteutf8(k->name), quoteutf8(k->value));
1494 sink_writes(ev_writer_sink(c->w), ".\n");
1495 return 1; /* completed */
1498 static int c_schedule_del(struct conn *c,
1500 int attribute((unused)) nvec) {
1501 struct kvp *actiondata = schedule_get(vec[0]);
1504 sink_writes(ev_writer_sink(c->w), "555 No such event\n");
1505 return 1; /* completed */
1507 /* If you have admin rights you can delete anything. If you don't then you
1508 * can only delete your own scheduled events. */
1509 if(!(c->rights & RIGHT_ADMIN)) {
1510 const char *who = kvp_get(actiondata, "who");
1512 if(!who || !c->who || strcmp(who, c->who)) {
1513 sink_writes(ev_writer_sink(c->w), "551 Not authorized\n");
1514 return 1; /* completed */
1517 if(schedule_del(vec[0]))
1518 sink_writes(ev_writer_sink(c->w), "550 Could not delete scheduled event\n");
1520 sink_writes(ev_writer_sink(c->w), "250 Deleted\n");
1521 return 1; /* completed */
1524 static int c_schedule_add(struct conn *c,
1527 struct kvp *actiondata = 0;
1530 /* Standard fields */
1531 kvp_set(&actiondata, "who", c->who);
1532 kvp_set(&actiondata, "when", vec[0]);
1533 kvp_set(&actiondata, "priority", vec[1]);
1534 kvp_set(&actiondata, "action", vec[2]);
1535 /* Action-dependent fields */
1536 if(!strcmp(vec[2], "play")) {
1538 sink_writes(ev_writer_sink(c->w), "550 Wrong number of arguments\n");
1541 if(!trackdb_exists(vec[3])) {
1542 sink_writes(ev_writer_sink(c->w), "550 Track is not in database\n");
1545 kvp_set(&actiondata, "track", vec[3]);
1546 } else if(!strcmp(vec[2], "set-global")) {
1547 if(nvec < 4 || nvec > 5) {
1548 sink_writes(ev_writer_sink(c->w), "550 Wrong number of arguments\n");
1551 kvp_set(&actiondata, "key", vec[3]);
1553 kvp_set(&actiondata, "value", vec[4]);
1555 sink_writes(ev_writer_sink(c->w), "550 Unknown action\n");
1558 /* schedule_add() checks user rights */
1559 id = schedule_add(c->ev, actiondata);
1561 sink_writes(ev_writer_sink(c->w), "550 Cannot add scheduled event\n");
1563 sink_printf(ev_writer_sink(c->w), "252 %s\n", id);
1567 static const struct command {
1568 /** @brief Command name */
1571 /** @brief Minimum number of arguments */
1574 /** @brief Maximum number of arguments */
1577 /** @brief Function to process command */
1578 int (*fn)(struct conn *, char **, int);
1580 /** @brief Rights required to execute command
1582 * 0 means that the command can be issued without logging in. If multiple
1583 * bits are listed here any of those rights will do.
1587 { "adduser", 2, 3, c_adduser, RIGHT_ADMIN|RIGHT__LOCAL },
1588 { "allfiles", 0, 2, c_allfiles, RIGHT_READ },
1589 { "confirm", 1, 1, c_confirm, 0 },
1590 { "cookie", 1, 1, c_cookie, 0 },
1591 { "deluser", 1, 1, c_deluser, RIGHT_ADMIN|RIGHT__LOCAL },
1592 { "dirs", 0, 2, c_dirs, RIGHT_READ },
1593 { "disable", 0, 1, c_disable, RIGHT_GLOBAL_PREFS },
1594 { "edituser", 3, 3, c_edituser, RIGHT_ADMIN|RIGHT_USERINFO },
1595 { "enable", 0, 0, c_enable, RIGHT_GLOBAL_PREFS },
1596 { "enabled", 0, 0, c_enabled, RIGHT_READ },
1597 { "exists", 1, 1, c_exists, RIGHT_READ },
1598 { "files", 0, 2, c_files, RIGHT_READ },
1599 { "get", 2, 2, c_get, RIGHT_READ },
1600 { "get-global", 1, 1, c_get_global, RIGHT_READ },
1601 { "length", 1, 1, c_length, RIGHT_READ },
1602 { "log", 0, 0, c_log, RIGHT_READ },
1603 { "make-cookie", 0, 0, c_make_cookie, RIGHT_READ },
1604 { "move", 2, 2, c_move, RIGHT_MOVE__MASK },
1605 { "moveafter", 1, INT_MAX, c_moveafter, RIGHT_MOVE__MASK },
1606 { "new", 0, 1, c_new, RIGHT_READ },
1607 { "nop", 0, 0, c_nop, 0 },
1608 { "part", 3, 3, c_part, RIGHT_READ },
1609 { "pause", 0, 0, c_pause, RIGHT_PAUSE },
1610 { "play", 1, 1, c_play, RIGHT_PLAY },
1611 { "playing", 0, 0, c_playing, RIGHT_READ },
1612 { "prefs", 1, 1, c_prefs, RIGHT_READ },
1613 { "queue", 0, 0, c_queue, RIGHT_READ },
1614 { "random-disable", 0, 0, c_random_disable, RIGHT_GLOBAL_PREFS },
1615 { "random-enable", 0, 0, c_random_enable, RIGHT_GLOBAL_PREFS },
1616 { "random-enabled", 0, 0, c_random_enabled, RIGHT_READ },
1617 { "recent", 0, 0, c_recent, RIGHT_READ },
1618 { "reconfigure", 0, 0, c_reconfigure, RIGHT_ADMIN },
1619 { "register", 3, 3, c_register, RIGHT_REGISTER|RIGHT__LOCAL },
1620 { "reminder", 1, 1, c_reminder, RIGHT__LOCAL },
1621 { "remove", 1, 1, c_remove, RIGHT_REMOVE__MASK },
1622 { "rescan", 0, INT_MAX, c_rescan, RIGHT_RESCAN },
1623 { "resolve", 1, 1, c_resolve, RIGHT_READ },
1624 { "resume", 0, 0, c_resume, RIGHT_PAUSE },
1625 { "revoke", 0, 0, c_revoke, RIGHT_READ },
1626 { "rtp-address", 0, 0, c_rtp_address, 0 },
1627 { "schedule-add", 3, INT_MAX, c_schedule_add, RIGHT_READ },
1628 { "schedule-del", 1, 1, c_schedule_del, RIGHT_READ },
1629 { "schedule-get", 1, 1, c_schedule_get, RIGHT_READ },
1630 { "schedule-list", 0, 0, c_schedule_list, RIGHT_READ },
1631 { "scratch", 0, 1, c_scratch, RIGHT_SCRATCH__MASK },
1632 { "search", 1, 1, c_search, RIGHT_READ },
1633 { "set", 3, 3, c_set, RIGHT_PREFS, },
1634 { "set-global", 2, 2, c_set_global, RIGHT_GLOBAL_PREFS },
1635 { "shutdown", 0, 0, c_shutdown, RIGHT_ADMIN },
1636 { "stats", 0, 0, c_stats, RIGHT_READ },
1637 { "tags", 0, 0, c_tags, RIGHT_READ },
1638 { "unset", 2, 2, c_set, RIGHT_PREFS },
1639 { "unset-global", 1, 1, c_set_global, RIGHT_GLOBAL_PREFS },
1640 { "user", 2, 2, c_user, 0 },
1641 { "userinfo", 2, 2, c_userinfo, RIGHT_READ },
1642 { "users", 0, 0, c_users, RIGHT_READ },
1643 { "version", 0, 0, c_version, RIGHT_READ },
1644 { "volume", 0, 2, c_volume, RIGHT_READ|RIGHT_VOLUME }
1647 static void command_error(const char *msg, void *u) {
1650 sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg);
1653 /* process a command. Return 1 if complete, 0 if incomplete. */
1654 static int command(struct conn *c, char *line) {
1658 D(("server command %s", line));
1659 /* We force everything into NFC as early as possible */
1660 if(!(line = utf8_compose_canon(line, strlen(line), 0))) {
1661 sink_writes(ev_writer_sink(c->w), "500 cannot normalize command\n");
1664 if(!(vec = split(line, &nvec, SPLIT_QUOTES, command_error, c))) {
1665 sink_writes(ev_writer_sink(c->w), "500 cannot parse command\n");
1669 sink_writes(ev_writer_sink(c->w), "500 do what?\n");
1672 if((n = TABLE_FIND(commands, name, vec[0])) < 0)
1673 sink_writes(ev_writer_sink(c->w), "500 unknown command\n");
1675 if(commands[n].rights
1676 && !(c->rights & commands[n].rights)) {
1677 error(0, "%s attempted %s but lacks required rights", c->who ? c->who : "NULL",
1679 sink_writes(ev_writer_sink(c->w), "510 Prohibited\n");
1684 if(nvec < commands[n].minargs) {
1685 sink_writes(ev_writer_sink(c->w), "500 missing argument(s)\n");
1688 if(nvec > commands[n].maxargs) {
1689 sink_writes(ev_writer_sink(c->w), "500 too many arguments\n");
1692 return commands[n].fn(c, vec, nvec);
1694 return 1; /* completed */
1697 /* redirect to the right reader callback for our current state */
1698 static int redirect_reader_callback(ev_source *ev,
1706 return c->reader(ev, reader, ptr, bytes, eof, u);
1709 /* the main command reader */
1710 static int reader_callback(ev_source attribute((unused)) *ev,
1720 D(("server reader_callback"));
1721 while((eol = memchr(ptr, '\n', bytes))) {
1723 ev_reader_consume(reader, eol - (char *)ptr);
1724 complete = command(c, ptr);
1725 bytes -= (eol - (char *)ptr);
1728 /* the command had better have set a new reader callback */
1730 /* there are further bytes to read, or we are at eof; arrange for the
1731 * command's reader callback to handle them */
1732 return ev_reader_incomplete(reader);
1733 /* nothing's going on right now */
1736 /* command completed, we can go around and handle the next one */
1740 error(0, "S%x unterminated line", c->tag);
1741 D(("normal reader close"));
1744 D(("close associated writer"));
1745 ev_writer_close(c->w);
1748 remove_connection(c);
1753 static int listen_callback(ev_source *ev,
1755 const struct sockaddr attribute((unused)) *remote,
1756 socklen_t attribute((unused)) rlen,
1758 const struct listener *l = u;
1759 struct conn *c = xmalloc(sizeof *c);
1760 static unsigned tags;
1762 D(("server listen_callback fd %d (%s)", fd, l->name));
1767 c->w = ev_writer_new(ev, fd, writer_error, c,
1769 c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c,
1773 c->reader = reader_callback;
1776 gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM);
1777 sink_printf(ev_writer_sink(c->w), "231 %d %s %s\n",
1779 config->authorization_algorithm,
1780 hex(c->nonce, sizeof c->nonce));
1784 int server_start(ev_source *ev, int pf,
1785 size_t socklen, const struct sockaddr *sa,
1788 struct listener *l = xmalloc(sizeof *l);
1789 static const int one = 1;
1791 D(("server_init socket %s", name));
1792 fd = xsocket(pf, SOCK_STREAM, 0);
1793 xsetsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
1794 if(bind(fd, sa, socklen) < 0) {
1795 error(errno, "error binding to %s", name);
1803 if(ev_listen(ev, fd, listen_callback, l, "server listener"))
1808 int server_stop(ev_source *ev, int fd) {
1810 return ev_listen_cancel(ev, fd);