2 * This file is part of DisOrder.
3 * Copyright (C) 2004, 2005, 2006, 2007 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
25 #include <sys/types.h>
26 #include <sys/socket.h>
39 #include <netinet/in.h>
45 #include "server-queue.h"
52 #include "configuration.h"
62 #include "trackname.h"
68 # define NONCE_SIZE 16
71 int volume_left, volume_right; /* last known volume */
73 /** @brief Accept all well-formed login attempts
91 unsigned char nonce[NONCE_SIZE];
92 ev_reader_callback *reader;
93 struct eventlog_output *lo;
94 const struct listener *l;
97 static int reader_callback(ev_source *ev,
105 static const char *noyes[] = { "no", "yes" };
107 static int writer_error(ev_source attribute((unused)) *ev,
113 D(("server writer_error %d %d", fd, errno_value));
114 if(errno_value == 0) {
118 //D(("server writer_error closes %d", fd));
119 info("server writer_error closes %d because all done", fd); /* TODO */
120 xclose(fd); /* reader is done too, close */
122 //D(("server writer_error shutdown %d SHUT_WR", fd));
123 info("server writer_error shutdown %d SHUT_WR", fd); /* TODO */
124 xshutdown(fd, SHUT_WR); /* reader is not done yet */
127 if(errno_value != EPIPE)
128 error(errno_value, "S%x write error on socket", c->tag);
130 ev_reader_cancel(c->r);
131 info("server writer_error closes %d because errno=%d", fd, errno_value); /* TODO */
137 static int reader_error(ev_source attribute((unused)) *ev,
143 D(("server reader_error %d %d", fd, errno_value));
144 error(errno, "S%x read error on socket", c->tag);
145 ev_writer_cancel(c->w);
147 info("reader_error closing fd %d", fd); /* TODO */
152 /* return true if we are talking to a trusted user */
153 static int trusted(struct conn *c) {
156 for(n = 0; (n < config->trust.n
157 && strcmp(config->trust.s[n], c->who)); ++n)
159 return n < config->trust.n;
162 static int c_disable(struct conn *c, char **vec, int nvec) {
164 disable_playing(c->who);
165 else if(nvec == 1 && !strcmp(vec[0], "now"))
166 disable_playing(c->who);
168 sink_writes(ev_writer_sink(c->w), "550 invalid argument\n");
169 return 1; /* completed */
171 sink_writes(ev_writer_sink(c->w), "250 OK\n");
172 return 1; /* completed */
175 static int c_enable(struct conn *c,
176 char attribute((unused)) **vec,
177 int attribute((unused)) nvec) {
178 enable_playing(c->who, c->ev);
179 /* Enable implicitly unpauses if there is nothing playing */
180 if(paused && !playing) resume_playing(c->who);
181 sink_writes(ev_writer_sink(c->w), "250 OK\n");
182 return 1; /* completed */
185 static int c_enabled(struct conn *c,
186 char attribute((unused)) **vec,
187 int attribute((unused)) nvec) {
188 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[playing_is_enabled()]);
189 return 1; /* completed */
192 static int c_play(struct conn *c, char **vec,
193 int attribute((unused)) nvec) {
195 struct queue_entry *q;
197 if(!trackdb_exists(vec[0])) {
198 sink_writes(ev_writer_sink(c->w), "550 track is not in database\n");
201 if(!(track = trackdb_resolve(vec[0]))) {
202 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
205 q = queue_add(track, c->who, WHERE_BEFORE_RANDOM);
207 /* If we added the first track, and something is playing, then prepare the
208 * new track. If nothing is playing then we don't bother as it wouldn't gain
210 if(q == qhead.next && playing)
212 sink_writes(ev_writer_sink(c->w), "250 queued\n");
213 /* If the queue was empty but we are for some reason paused then
215 if(!playing) resume_playing(0);
217 return 1; /* completed */
220 static int c_remove(struct conn *c, char **vec,
221 int attribute((unused)) nvec) {
222 struct queue_entry *q;
224 if(!(q = queue_find(vec[0]))) {
225 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
228 if(config->restrictions & RESTRICT_REMOVE) {
229 /* can only remove tracks that you submitted */
230 if(!q->submitter || strcmp(q->submitter, c->who)) {
231 sink_writes(ev_writer_sink(c->w), "550 you didn't submit that track!\n");
235 queue_remove(q, c->who);
236 /* De-prepare the track. */
238 /* If we removed the random track then add another one. */
239 if(q->state == playing_random)
241 /* Prepare whatever the next head track is. */
242 if(qhead.next != &qhead)
243 prepare(c->ev, qhead.next);
245 sink_writes(ev_writer_sink(c->w), "250 removed\n");
246 return 1; /* completed */
249 static int c_scratch(struct conn *c,
253 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
254 return 1; /* completed */
256 if(config->restrictions & RESTRICT_SCRATCH) {
257 /* can only scratch tracks you submitted and randomly selected ones */
258 if(playing->submitter && strcmp(playing->submitter, c->who)) {
259 sink_writes(ev_writer_sink(c->w), "550 you didn't submit that track!\n");
263 scratch(c->who, nvec == 1 ? vec[0] : 0);
264 /* If you scratch an unpaused track then it is automatically unpaused */
266 sink_writes(ev_writer_sink(c->w), "250 scratched\n");
267 return 1; /* completed */
270 static int c_pause(struct conn *c,
271 char attribute((unused)) **vec,
272 int attribute((unused)) nvec) {
274 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
275 return 1; /* completed */
278 sink_writes(ev_writer_sink(c->w), "250 already paused\n");
279 return 1; /* completed */
281 if(pause_playing(c->who) < 0)
282 sink_writes(ev_writer_sink(c->w), "550 cannot pause this track\n");
284 sink_writes(ev_writer_sink(c->w), "250 paused\n");
288 static int c_resume(struct conn *c,
289 char attribute((unused)) **vec,
290 int attribute((unused)) nvec) {
292 sink_writes(ev_writer_sink(c->w), "250 not paused\n");
293 return 1; /* completed */
295 resume_playing(c->who);
296 sink_writes(ev_writer_sink(c->w), "250 paused\n");
300 static int c_shutdown(struct conn *c,
301 char attribute((unused)) **vec,
302 int attribute((unused)) nvec) {
303 info("S%x shut down by %s", c->tag, c->who);
304 sink_writes(ev_writer_sink(c->w), "250 shutting down\n");
305 ev_writer_flush(c->w);
309 static int c_reconfigure(struct conn *c,
310 char attribute((unused)) **vec,
311 int attribute((unused)) nvec) {
312 info("S%x reconfigure by %s", c->tag, c->who);
313 if(reconfigure(c->ev, 1))
314 sink_writes(ev_writer_sink(c->w), "550 error reading new config\n");
316 sink_writes(ev_writer_sink(c->w), "250 installed new config\n");
317 return 1; /* completed */
320 static int c_rescan(struct conn *c,
321 char attribute((unused)) **vec,
322 int attribute((unused)) nvec) {
323 info("S%x rescan by %s", c->tag, c->who);
324 trackdb_rescan(c->ev);
325 sink_writes(ev_writer_sink(c->w), "250 initiated rescan\n");
326 return 1; /* completed */
329 static int c_version(struct conn *c,
330 char attribute((unused)) **vec,
331 int attribute((unused)) nvec) {
332 /* VERSION had better only use the basic character set */
333 sink_printf(ev_writer_sink(c->w), "251 %s\n", disorder_version_string);
334 return 1; /* completed */
337 static int c_playing(struct conn *c,
338 char attribute((unused)) **vec,
339 int attribute((unused)) nvec) {
341 queue_fix_sofar(playing);
342 playing->expected = 0;
343 sink_printf(ev_writer_sink(c->w), "252 %s\n", queue_marshall(playing));
345 sink_printf(ev_writer_sink(c->w), "259 nothing playing\n");
346 return 1; /* completed */
349 static int c_become(struct conn *c,
351 int attribute((unused)) nvec) {
353 sink_writes(ev_writer_sink(c->w), "230 OK\n");
357 static int c_user(struct conn *c,
359 int attribute((unused)) nvec) {
364 struct sockaddr_in in;
365 struct sockaddr_in6 in6;
371 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
374 /* get connection data */
376 if(getpeername(c->fd, &u.sa, &l) < 0) {
377 error(errno, "S%x error calling getpeername", c->tag);
378 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
381 if(c->l->pf != PF_UNIX) {
382 if((n = getnameinfo(&u.sa, l,
383 host, sizeof host, 0, 0, NI_NUMERICHOST))) {
384 error(0, "S%x error calling getnameinfo: %s", c->tag, gai_strerror(n));
385 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
389 strcpy(host, "local");
391 for(n = 0; n < config->allow.n
392 && strcmp(config->allow.s[n].s[0], vec[0]); ++n)
394 /* if it's a real user check whether the response is right */
395 if(n >= config->allow.n) {
396 info("S%x unknown user '%s' from %s", c->tag, vec[0], host);
397 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
400 res = authhash(c->nonce, sizeof c->nonce, config->allow.s[n].s[1],
401 config->authorization_algorithm);
402 if(wideopen || (res && !strcmp(res, vec[1]))) {
404 /* currently we only bother logging remote connections */
405 if(c->l->pf != PF_UNIX)
406 info("S%x %s connected from %s", c->tag, vec[0], host);
407 sink_writes(ev_writer_sink(c->w), "230 OK\n");
410 /* oops, response was wrong */
411 info("S%x authentication failure for %s from %s", c->tag, vec[0], host);
412 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
416 static int c_recent(struct conn *c,
417 char attribute((unused)) **vec,
418 int attribute((unused)) nvec) {
419 const struct queue_entry *q;
421 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
422 for(q = phead.next; q != &phead; q = q->next)
423 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
424 sink_writes(ev_writer_sink(c->w), ".\n");
425 return 1; /* completed */
428 static int c_queue(struct conn *c,
429 char attribute((unused)) **vec,
430 int attribute((unused)) nvec) {
431 struct queue_entry *q;
436 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
437 if(playing_is_enabled() && !paused) {
439 queue_fix_sofar(playing);
440 if((l = trackdb_get(playing->track, "_length"))
441 && (length = atol(l))) {
443 when += length - playing->sofar + config->gap;
446 /* Nothing is playing but playing is enabled, so whatever is
447 * first in the queue can be expected to start immediately. */
450 for(q = qhead.next; q != &qhead; q = q->next) {
451 /* fill in estimated start time */
453 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
454 /* update for next track */
456 if((l = trackdb_get(q->track, "_length"))
457 && (length = atol(l)))
458 when += length + config->gap;
463 sink_writes(ev_writer_sink(c->w), ".\n");
464 return 1; /* completed */
467 static int output_list(struct conn *c, char **vec) {
469 sink_printf(ev_writer_sink(c->w), "%s\n", *vec++);
470 sink_writes(ev_writer_sink(c->w), ".\n");
474 static int files_dirs(struct conn *c,
477 enum trackdb_listable what) {
478 const char *dir, *re, *errstr;
484 case 0: dir = 0; re = 0; break;
485 case 1: dir = vec[0]; re = 0; break;
486 case 2: dir = vec[0]; re = vec[1]; break;
489 /* A bit of a bodge to make sure the args don't trample on cache keys */
490 if(dir && strchr(dir, '\n')) {
491 sink_writes(ev_writer_sink(c->w), "550 invalid directory name\n");
494 if(re && strchr(re, '\n')) {
495 sink_writes(ev_writer_sink(c->w), "550 invalid regexp\n");
498 /* We bother eliminating "" because the web interface is relatively
499 * likely to send it */
501 byte_xasprintf(&key, "%d\n%s\n%s", (int)what, dir ? dir : "", re);
502 fvec = (char **)cache_get(&cache_files_type, key);
504 /* Got a cache hit, don't store the answer in the cache */
507 rec = 0; /* quieten compiler */
509 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
511 if(!(rec = pcre_compile(re, PCRE_CASELESS|PCRE_UTF8,
512 &errstr, &erroffset, 0))) {
513 sink_printf(ev_writer_sink(c->w), "550 Error compiling regexp: %s\n",
517 /* It only counts as a miss if the regexp was valid. */
518 ++cache_files_misses;
521 /* No regexp, don't bother caching the result */
527 /* No cache hit (either because a miss, or because we did not look) so do
530 fvec = trackdb_list(dir, 0, what, rec);
532 fvec = trackdb_list(0, 0, what, rec);
535 /* Put the answer in the cache */
536 cache_put(&cache_files_type, key, fvec);
537 sink_writes(ev_writer_sink(c->w), "253 Listing follow\n");
538 return output_list(c, fvec);
541 static int c_files(struct conn *c,
544 return files_dirs(c, vec, nvec, trackdb_files);
547 static int c_dirs(struct conn *c,
550 return files_dirs(c, vec, nvec, trackdb_directories);
553 static int c_allfiles(struct conn *c,
556 return files_dirs(c, vec, nvec, trackdb_directories|trackdb_files);
559 static int c_get(struct conn *c,
561 int attribute((unused)) nvec) {
564 if(vec[1][0] != '_' && (v = trackdb_get(vec[0], vec[1])))
565 sink_printf(ev_writer_sink(c->w), "252 %s\n", v);
567 sink_writes(ev_writer_sink(c->w), "550 not found\n");
571 static int c_length(struct conn *c,
573 int attribute((unused)) nvec) {
574 const char *track, *v;
576 if(!(track = trackdb_resolve(vec[0]))) {
577 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
580 if((v = trackdb_get(track, "_length")))
581 sink_printf(ev_writer_sink(c->w), "252 %s\n", v);
583 sink_writes(ev_writer_sink(c->w), "550 not found\n");
587 static int c_set(struct conn *c,
589 int attribute((unused)) nvec) {
590 if(vec[1][0] != '_' && !trackdb_set(vec[0], vec[1], vec[2]))
591 sink_writes(ev_writer_sink(c->w), "250 OK\n");
593 sink_writes(ev_writer_sink(c->w), "550 not found\n");
597 static int c_prefs(struct conn *c,
599 int attribute((unused)) nvec) {
602 k = trackdb_get_all(vec[0]);
603 sink_writes(ev_writer_sink(c->w), "253 prefs follow\n");
604 for(; k; k = k->next)
605 if(k->name[0] != '_') /* omit internal values */
606 sink_printf(ev_writer_sink(c->w),
607 " %s %s\n", quoteutf8(k->name), quoteutf8(k->value));
608 sink_writes(ev_writer_sink(c->w), ".\n");
612 static int c_exists(struct conn *c,
614 int attribute((unused)) nvec) {
615 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]);
619 static void search_parse_error(const char *msg, void *u) {
620 *(const char **)u = msg;
623 static int c_search(struct conn *c,
625 int attribute((unused)) nvec) {
626 char **terms, **results;
627 int nterms, nresults, n;
628 const char *e = "unknown error";
630 /* This is a bit of a bodge. Initially it's there to make the eclient
631 * interface a bit more convenient to add searching to, but it has the more
632 * compelling advantage that if everything uses it, then interpretation of
633 * user-supplied search strings will be the same everywhere. */
634 if(!(terms = split(vec[0], &nterms, SPLIT_QUOTES, search_parse_error, &e))) {
635 sink_printf(ev_writer_sink(c->w), "550 %s\n", e);
637 results = trackdb_search(terms, nterms, &nresults);
638 sink_printf(ev_writer_sink(c->w), "253 %d matches\n", nresults);
639 for(n = 0; n < nresults; ++n)
640 sink_printf(ev_writer_sink(c->w), "%s\n", results[n]);
641 sink_writes(ev_writer_sink(c->w), ".\n");
646 static int c_random_enable(struct conn *c,
647 char attribute((unused)) **vec,
648 int attribute((unused)) nvec) {
649 enable_random(c->who, c->ev);
650 /* Enable implicitly unpauses if there is nothing playing */
651 if(paused && !playing) resume_playing(c->who);
652 sink_writes(ev_writer_sink(c->w), "250 OK\n");
653 return 1; /* completed */
656 static int c_random_disable(struct conn *c,
657 char attribute((unused)) **vec,
658 int attribute((unused)) nvec) {
659 disable_random(c->who);
660 sink_writes(ev_writer_sink(c->w), "250 OK\n");
661 return 1; /* completed */
664 static int c_random_enabled(struct conn *c,
665 char attribute((unused)) **vec,
666 int attribute((unused)) nvec) {
667 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[random_is_enabled()]);
668 return 1; /* completed */
671 static void got_stats(char *stats, void *u) {
672 struct conn *const c = u;
674 sink_printf(ev_writer_sink(c->w), "253 stats\n%s\n.\n", stats);
675 /* Now we can start processing commands again */
676 ev_reader_enable(c->r);
679 static int c_stats(struct conn *c,
680 char attribute((unused)) **vec,
681 int attribute((unused)) nvec) {
682 trackdb_stats_subprocess(c->ev, got_stats, c);
683 return 0; /* not yet complete */
686 static int c_volume(struct conn *c,
697 l = r = atoi(vec[0]);
708 if(mixer_control(&l, &r, set))
709 sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n");
711 sink_printf(ev_writer_sink(c->w), "252 %d %d\n", l, r);
712 if(l != volume_left || r != volume_right) {
715 snprintf(lb, sizeof lb, "%d", l);
716 snprintf(rb, sizeof rb, "%d", r);
717 eventlog("volume", lb, rb, (char *)0);
723 /* we are logging, and some data is available to read */
724 static int logging_reader_callback(ev_source *ev,
733 /* don't log to this conn any more */
734 eventlog_remove(c->lo);
735 /* terminate the log output */
736 sink_writes(ev_writer_sink(c->w), ".\n");
737 /* restore the reader callback */
738 c->reader = reader_callback;
739 /* ...and exit via it */
740 return c->reader(ev, reader, fd, ptr, bytes, eof, u);
743 static void logclient(const char *msg, void *user) {
744 struct conn *c = user;
746 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" %s\n",
747 (uintmax_t)time(0), msg);
750 static int c_log(struct conn *c,
751 char attribute((unused)) **vec,
752 int attribute((unused)) nvec) {
755 sink_writes(ev_writer_sink(c->w), "254 OK\n");
756 /* pump out initial state */
758 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
760 playing_is_enabled() ? "enable_play" : "disable_play");
761 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
763 random_is_enabled() ? "enable_random" : "disable_random");
764 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
766 paused ? "pause" : "resume");
768 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state playing\n",
771 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" volume %d %d\n",
772 (uintmax_t)now, volume_left, volume_right);
773 c->lo = xmalloc(sizeof *c->lo);
774 c->lo->fn = logclient;
777 c->reader = logging_reader_callback;
781 static void post_move_cleanup(void) {
782 struct queue_entry *q;
784 /* If we have caused any random tracks to not be at the end then we make them
785 * no longer be random. */
786 for(q = qhead.next; q != &qhead; q = q->next)
787 if(q->state == playing_random && q->next != &qhead)
788 q->state = playing_unplayed;
789 /* That might mean we need to add a new random track. */
794 static int c_move(struct conn *c,
796 int attribute((unused)) nvec) {
797 struct queue_entry *q;
800 if(config->restrictions & RESTRICT_MOVE) {
802 sink_writes(ev_writer_sink(c->w),
803 "550 only trusted users can move tracks\n");
807 if(!(q = queue_find(vec[0]))) {
808 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
811 n = queue_move(q, atoi(vec[1]), c->who);
813 sink_printf(ev_writer_sink(c->w), "252 %d\n", n);
814 /* If we've moved to the head of the queue then prepare the track. */
820 static int c_moveafter(struct conn *c,
822 int attribute((unused)) nvec) {
823 struct queue_entry *q, **qs;
826 if(config->restrictions & RESTRICT_MOVE) {
828 sink_writes(ev_writer_sink(c->w),
829 "550 only trusted users can move tracks\n");
834 if(!(q = queue_find(vec[0]))) {
835 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
842 qs = xcalloc(nvec, sizeof *qs);
843 for(n = 0; n < nvec; ++n)
844 if(!(qs[n] = queue_find(vec[n]))) {
845 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
848 queue_moveafter(q, nvec, qs, c->who);
850 sink_printf(ev_writer_sink(c->w), "250 Moved tracks\n");
851 /* If we've moved to the head of the queue then prepare the track. */
857 static int c_part(struct conn *c,
859 int attribute((unused)) nvec) {
860 sink_printf(ev_writer_sink(c->w), "252 %s\n",
861 trackdb_getpart(vec[0], vec[1], vec[2]));
865 static int c_resolve(struct conn *c,
867 int attribute((unused)) nvec) {
870 if(!(track = trackdb_resolve(vec[0]))) {
871 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
874 sink_printf(ev_writer_sink(c->w), "252 %s\n", track);
878 static int c_tags(struct conn *c,
879 char attribute((unused)) **vec,
880 int attribute((unused)) nvec) {
881 char **tags = trackdb_alltags();
883 sink_printf(ev_writer_sink(c->w), "253 Tag list follows\n");
885 sink_printf(ev_writer_sink(c->w), "%s%s\n",
886 **tags == '.' ? "." : "", *tags);
889 sink_writes(ev_writer_sink(c->w), ".\n");
890 return 1; /* completed */
894 static int c_set_global(struct conn *c,
896 int attribute((unused)) nvec) {
897 trackdb_set_global(vec[0], vec[1], c->who);
898 sink_printf(ev_writer_sink(c->w), "250 OK\n");
902 static int c_get_global(struct conn *c,
904 int attribute((unused)) nvec) {
905 const char *s = trackdb_get_global(vec[0]);
908 sink_printf(ev_writer_sink(c->w), "252 %s\n", s);
910 sink_writes(ev_writer_sink(c->w), "550 not found\n");
914 static int c_nop(struct conn *c,
915 char attribute((unused)) **vec,
916 int attribute((unused)) nvec) {
917 sink_printf(ev_writer_sink(c->w), "250 Quack\n");
921 static int c_new(struct conn *c,
924 char **tracks = trackdb_new(0, nvec > 0 ? atoi(vec[0]) : INT_MAX);
926 sink_printf(ev_writer_sink(c->w), "253 New track list follows\n");
928 sink_printf(ev_writer_sink(c->w), "%s%s\n",
929 **tracks == '.' ? "." : "", *tracks);
932 sink_writes(ev_writer_sink(c->w), ".\n");
933 return 1; /* completed */
937 static int c_rtp_address(struct conn *c,
938 char attribute((unused)) **vec,
939 int attribute((unused)) nvec) {
940 if(config->speaker_backend == BACKEND_NETWORK) {
941 sink_printf(ev_writer_sink(c->w), "252 %s %s\n",
942 quoteutf8(config->broadcast.s[0]),
943 quoteutf8(config->broadcast.s[1]));
945 sink_writes(ev_writer_sink(c->w), "550 No RTP\n");
949 #define C_AUTH 0001 /* must be authenticated */
950 #define C_TRUSTED 0002 /* must be trusted user */
952 static const struct command {
954 int minargs, maxargs;
955 int (*fn)(struct conn *, char **, int);
958 { "allfiles", 0, 2, c_allfiles, C_AUTH },
959 { "become", 1, 1, c_become, C_AUTH|C_TRUSTED },
960 { "dirs", 0, 2, c_dirs, C_AUTH },
961 { "disable", 0, 1, c_disable, C_AUTH },
962 { "enable", 0, 0, c_enable, C_AUTH },
963 { "enabled", 0, 0, c_enabled, C_AUTH },
964 { "exists", 1, 1, c_exists, C_AUTH },
965 { "files", 0, 2, c_files, C_AUTH },
966 { "get", 2, 2, c_get, C_AUTH },
967 { "get-global", 1, 1, c_get_global, C_AUTH },
968 { "length", 1, 1, c_length, C_AUTH },
969 { "log", 0, 0, c_log, C_AUTH },
970 { "move", 2, 2, c_move, C_AUTH },
971 { "moveafter", 1, INT_MAX, c_moveafter, C_AUTH },
972 { "new", 0, 1, c_new, C_AUTH },
973 { "nop", 0, 0, c_nop, C_AUTH },
974 { "part", 3, 3, c_part, C_AUTH },
975 { "pause", 0, 0, c_pause, C_AUTH },
976 { "play", 1, 1, c_play, C_AUTH },
977 { "playing", 0, 0, c_playing, C_AUTH },
978 { "prefs", 1, 1, c_prefs, C_AUTH },
979 { "queue", 0, 0, c_queue, C_AUTH },
980 { "random-disable", 0, 0, c_random_disable, C_AUTH },
981 { "random-enable", 0, 0, c_random_enable, C_AUTH },
982 { "random-enabled", 0, 0, c_random_enabled, C_AUTH },
983 { "recent", 0, 0, c_recent, C_AUTH },
984 { "reconfigure", 0, 0, c_reconfigure, C_AUTH|C_TRUSTED },
985 { "remove", 1, 1, c_remove, C_AUTH },
986 { "rescan", 0, 0, c_rescan, C_AUTH|C_TRUSTED },
987 { "resolve", 1, 1, c_resolve, C_AUTH },
988 { "resume", 0, 0, c_resume, C_AUTH },
989 { "rtp-address", 0, 0, c_rtp_address, C_AUTH },
990 { "scratch", 0, 1, c_scratch, C_AUTH },
991 { "search", 1, 1, c_search, C_AUTH },
992 { "set", 3, 3, c_set, C_AUTH, },
993 { "set-global", 2, 2, c_set_global, C_AUTH },
994 { "shutdown", 0, 0, c_shutdown, C_AUTH|C_TRUSTED },
995 { "stats", 0, 0, c_stats, C_AUTH },
996 { "tags", 0, 0, c_tags, C_AUTH },
997 { "unset", 2, 2, c_set, C_AUTH },
998 { "unset-global", 1, 1, c_set_global, C_AUTH },
999 { "user", 2, 2, c_user, 0 },
1000 { "version", 0, 0, c_version, C_AUTH },
1001 { "volume", 0, 2, c_volume, C_AUTH }
1004 static void command_error(const char *msg, void *u) {
1007 sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg);
1010 /* process a command. Return 1 if complete, 0 if incomplete. */
1011 static int command(struct conn *c, char *line) {
1015 D(("server command %s", line));
1016 if(!(vec = split(line, &nvec, SPLIT_QUOTES, command_error, c))) {
1017 sink_writes(ev_writer_sink(c->w), "500 cannot parse command\n");
1021 sink_writes(ev_writer_sink(c->w), "500 do what?\n");
1024 if((n = TABLE_FIND(commands, struct command, name, vec[0])) < 0)
1025 sink_writes(ev_writer_sink(c->w), "500 unknown command\n");
1027 if((commands[n].flags & C_AUTH) && !c->who) {
1028 sink_writes(ev_writer_sink(c->w), "530 not authenticated\n");
1031 if((commands[n].flags & C_TRUSTED) && !trusted(c)) {
1032 sink_writes(ev_writer_sink(c->w), "530 insufficient privilege\n");
1037 if(nvec < commands[n].minargs) {
1038 sink_writes(ev_writer_sink(c->w), "500 missing argument(s)\n");
1041 if(nvec > commands[n].maxargs) {
1042 sink_writes(ev_writer_sink(c->w), "500 too many arguments\n");
1045 return commands[n].fn(c, vec, nvec);
1047 return 1; /* completed */
1050 /* redirect to the right reader callback for our current state */
1051 static int redirect_reader_callback(ev_source *ev,
1060 return c->reader(ev, reader, fd, ptr, bytes, eof, u);
1063 /* the main command reader */
1064 static int reader_callback(ev_source attribute((unused)) *ev,
1066 int attribute((unused)) fd,
1075 D(("server reader_callback"));
1076 while((eol = memchr(ptr, '\n', bytes))) {
1078 ev_reader_consume(reader, eol - (char *)ptr);
1079 complete = command(c, ptr);
1080 bytes -= (eol - (char *)ptr);
1083 /* the command had better have set a new reader callback */
1085 /* there are further bytes to read, or we are at eof; arrange for the
1086 * command's reader callback to handle them */
1087 return ev_reader_incomplete(reader);
1088 /* nothing's going on right now */
1091 /* command completed, we can go around and handle the next one */
1095 error(0, "S%x unterminated line", c->tag);
1097 return ev_writer_close(c->w);
1102 static int listen_callback(ev_source *ev,
1104 const struct sockaddr attribute((unused)) *remote,
1105 socklen_t attribute((unused)) rlen,
1107 const struct listener *l = u;
1108 struct conn *c = xmalloc(sizeof *c);
1109 static unsigned tags;
1111 D(("server listen_callback fd %d (%s)", fd, l->name));
1116 c->w = ev_writer_new(ev, fd, writer_error, c,
1118 c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c,
1121 c->reader = reader_callback;
1123 gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM);
1124 if(!strcmp(config->authorization_algorithm, "sha1")
1125 || !strcmp(config->authorization_algorithm, "SHA1")) {
1126 sink_printf(ev_writer_sink(c->w), "231 %s\n",
1127 hex(c->nonce, sizeof c->nonce));
1129 sink_printf(ev_writer_sink(c->w), "231 %s %s\n",
1130 config->authorization_algorithm,
1131 hex(c->nonce, sizeof c->nonce));
1136 int server_start(ev_source *ev, int pf,
1137 size_t socklen, const struct sockaddr *sa,
1140 struct listener *l = xmalloc(sizeof *l);
1141 static const int one = 1;
1143 D(("server_init socket %s", name));
1144 fd = xsocket(pf, SOCK_STREAM, 0);
1145 xsetsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
1146 if(bind(fd, sa, socklen) < 0) {
1147 error(errno, "error binding to %s", name);
1155 if(ev_listen(ev, fd, listen_callback, l, "server listener"))
1160 int server_stop(ev_source *ev, int fd) {
1162 return ev_listen_cancel(ev, fd);