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
84 /** @brief One client connection */
86 /** @brief Read commands from here */
88 /** @brief Send responses to here */
90 /** @brief Underlying file descriptor */
92 /** @brief Unique identifier for connection used in log messages */
94 /** @brief Login name or NULL */
96 /** @brief Event loop */
98 /** @brief Nonce chosen for this connection */
99 unsigned char nonce[NONCE_SIZE];
100 /** @brief Current reader callback
102 * We change this depending on whether we're servicing the @b log command
104 ev_reader_callback *reader;
105 /** @brief Event log output sending to this connection */
106 struct eventlog_output *lo;
107 /** @brief Parent listener */
108 const struct listener *l;
111 static int reader_callback(ev_source *ev,
118 static const char *noyes[] = { "no", "yes" };
120 /** @brief Called when a connection's writer fails or is shut down
122 * If the connection still has a raeder that is cancelled.
124 static int writer_error(ev_source attribute((unused)) *ev,
129 D(("server writer_error %d", errno_value));
130 info("writer_error S%x %d", c->tag, errno_value);
131 if(errno_value == 0) {
133 error(errno_value, "S%x writer completed", c->tag); /* TODO */
135 if(errno_value != EPIPE)
136 error(errno_value, "S%x write error on socket", c->tag);
138 info("cancel reader");
139 ev_reader_cancel(c->r);
142 info("done cancel reader");
149 /** @brief Called when a conncetion's reader fails or is shut down
151 * If connection still has a writer then it is closed.
153 static int reader_error(ev_source attribute((unused)) *ev,
158 D(("server reader_error %d", errno_value));
159 info("reader_error S%x %d", c->tag, errno_value);
160 error(errno_value, "S%x read error on socket", c->tag);
162 ev_writer_close(c->w);
169 /** @brief Return true if we are talking to a trusted user */
170 static int trusted(struct conn *c) {
173 for(n = 0; (n < config->trust.n
174 && strcmp(config->trust.s[n], c->who)); ++n)
176 return n < config->trust.n;
179 static int c_disable(struct conn *c, char **vec, int nvec) {
181 disable_playing(c->who);
182 else if(nvec == 1 && !strcmp(vec[0], "now"))
183 disable_playing(c->who);
185 sink_writes(ev_writer_sink(c->w), "550 invalid argument\n");
186 return 1; /* completed */
188 sink_writes(ev_writer_sink(c->w), "250 OK\n");
189 return 1; /* completed */
192 static int c_enable(struct conn *c,
193 char attribute((unused)) **vec,
194 int attribute((unused)) nvec) {
195 enable_playing(c->who, c->ev);
196 /* Enable implicitly unpauses if there is nothing playing */
197 if(paused && !playing) resume_playing(c->who);
198 sink_writes(ev_writer_sink(c->w), "250 OK\n");
199 return 1; /* completed */
202 static int c_enabled(struct conn *c,
203 char attribute((unused)) **vec,
204 int attribute((unused)) nvec) {
205 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[playing_is_enabled()]);
206 return 1; /* completed */
209 static int c_play(struct conn *c, char **vec,
210 int attribute((unused)) nvec) {
212 struct queue_entry *q;
214 if(!trackdb_exists(vec[0])) {
215 sink_writes(ev_writer_sink(c->w), "550 track is not in database\n");
218 if(!(track = trackdb_resolve(vec[0]))) {
219 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
222 q = queue_add(track, c->who, WHERE_BEFORE_RANDOM);
224 /* If we added the first track, and something is playing, then prepare the
225 * new track. If nothing is playing then we don't bother as it wouldn't gain
227 if(q == qhead.next && playing)
229 sink_writes(ev_writer_sink(c->w), "250 queued\n");
230 /* If the queue was empty but we are for some reason paused then
232 if(!playing) resume_playing(0);
234 return 1; /* completed */
237 static int c_remove(struct conn *c, char **vec,
238 int attribute((unused)) nvec) {
239 struct queue_entry *q;
241 if(!(q = queue_find(vec[0]))) {
242 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
245 if(config->restrictions & RESTRICT_REMOVE) {
246 /* can only remove tracks that you submitted */
247 if(!q->submitter || strcmp(q->submitter, c->who)) {
248 sink_writes(ev_writer_sink(c->w), "550 you didn't submit that track!\n");
252 queue_remove(q, c->who);
253 /* De-prepare the track. */
255 /* If we removed the random track then add another one. */
256 if(q->state == playing_random)
258 /* Prepare whatever the next head track is. */
259 if(qhead.next != &qhead)
260 prepare(c->ev, qhead.next);
262 sink_writes(ev_writer_sink(c->w), "250 removed\n");
263 return 1; /* completed */
266 static int c_scratch(struct conn *c,
270 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
271 return 1; /* completed */
273 if(config->restrictions & RESTRICT_SCRATCH) {
274 /* can only scratch tracks you submitted and randomly selected ones */
275 if(playing->submitter && strcmp(playing->submitter, c->who)) {
276 sink_writes(ev_writer_sink(c->w), "550 you didn't submit that track!\n");
280 scratch(c->who, nvec == 1 ? vec[0] : 0);
281 /* If you scratch an unpaused track then it is automatically unpaused */
283 sink_writes(ev_writer_sink(c->w), "250 scratched\n");
284 return 1; /* completed */
287 static int c_pause(struct conn *c,
288 char attribute((unused)) **vec,
289 int attribute((unused)) nvec) {
291 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
292 return 1; /* completed */
295 sink_writes(ev_writer_sink(c->w), "250 already paused\n");
296 return 1; /* completed */
298 if(pause_playing(c->who) < 0)
299 sink_writes(ev_writer_sink(c->w), "550 cannot pause this track\n");
301 sink_writes(ev_writer_sink(c->w), "250 paused\n");
305 static int c_resume(struct conn *c,
306 char attribute((unused)) **vec,
307 int attribute((unused)) nvec) {
309 sink_writes(ev_writer_sink(c->w), "250 not paused\n");
310 return 1; /* completed */
312 resume_playing(c->who);
313 sink_writes(ev_writer_sink(c->w), "250 paused\n");
317 static int c_shutdown(struct conn *c,
318 char attribute((unused)) **vec,
319 int attribute((unused)) nvec) {
320 info("S%x shut down by %s", c->tag, c->who);
321 sink_writes(ev_writer_sink(c->w), "250 shutting down\n");
322 ev_writer_flush(c->w);
326 static int c_reconfigure(struct conn *c,
327 char attribute((unused)) **vec,
328 int attribute((unused)) nvec) {
329 info("S%x reconfigure by %s", c->tag, c->who);
330 if(reconfigure(c->ev, 1))
331 sink_writes(ev_writer_sink(c->w), "550 error reading new config\n");
333 sink_writes(ev_writer_sink(c->w), "250 installed new config\n");
334 return 1; /* completed */
337 static int c_rescan(struct conn *c,
338 char attribute((unused)) **vec,
339 int attribute((unused)) nvec) {
340 info("S%x rescan by %s", c->tag, c->who);
341 trackdb_rescan(c->ev);
342 sink_writes(ev_writer_sink(c->w), "250 initiated rescan\n");
343 return 1; /* completed */
346 static int c_version(struct conn *c,
347 char attribute((unused)) **vec,
348 int attribute((unused)) nvec) {
349 /* VERSION had better only use the basic character set */
350 sink_printf(ev_writer_sink(c->w), "251 %s\n", disorder_version_string);
351 return 1; /* completed */
354 static int c_playing(struct conn *c,
355 char attribute((unused)) **vec,
356 int attribute((unused)) nvec) {
358 queue_fix_sofar(playing);
359 playing->expected = 0;
360 sink_printf(ev_writer_sink(c->w), "252 %s\n", queue_marshall(playing));
362 sink_printf(ev_writer_sink(c->w), "259 nothing playing\n");
363 return 1; /* completed */
366 static int c_become(struct conn *c,
368 int attribute((unused)) nvec) {
370 sink_writes(ev_writer_sink(c->w), "230 OK\n");
374 static int c_user(struct conn *c,
376 int attribute((unused)) nvec) {
381 struct sockaddr_in in;
382 struct sockaddr_in6 in6;
388 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
391 /* get connection data */
393 if(getpeername(c->fd, &u.sa, &l) < 0) {
394 error(errno, "S%x error calling getpeername", c->tag);
395 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
398 if(c->l->pf != PF_UNIX) {
399 if((n = getnameinfo(&u.sa, l,
400 host, sizeof host, 0, 0, NI_NUMERICHOST))) {
401 error(0, "S%x error calling getnameinfo: %s", c->tag, gai_strerror(n));
402 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
406 strcpy(host, "local");
408 for(n = 0; n < config->allow.n
409 && strcmp(config->allow.s[n].s[0], vec[0]); ++n)
411 /* if it's a real user check whether the response is right */
412 if(n >= config->allow.n) {
413 info("S%x unknown user '%s' from %s", c->tag, vec[0], host);
414 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
417 res = authhash(c->nonce, sizeof c->nonce, config->allow.s[n].s[1],
418 config->authorization_algorithm);
419 if(wideopen || (res && !strcmp(res, vec[1]))) {
421 /* currently we only bother logging remote connections */
422 if(c->l->pf != PF_UNIX)
423 info("S%x %s connected from %s", c->tag, vec[0], host);
424 sink_writes(ev_writer_sink(c->w), "230 OK\n");
427 /* oops, response was wrong */
428 info("S%x authentication failure for %s from %s", c->tag, vec[0], host);
429 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
433 static int c_recent(struct conn *c,
434 char attribute((unused)) **vec,
435 int attribute((unused)) nvec) {
436 const struct queue_entry *q;
438 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
439 for(q = phead.next; q != &phead; q = q->next)
440 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
441 sink_writes(ev_writer_sink(c->w), ".\n");
442 return 1; /* completed */
445 static int c_queue(struct conn *c,
446 char attribute((unused)) **vec,
447 int attribute((unused)) nvec) {
448 struct queue_entry *q;
453 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
454 if(playing_is_enabled() && !paused) {
456 queue_fix_sofar(playing);
457 if((l = trackdb_get(playing->track, "_length"))
458 && (length = atol(l))) {
460 when += length - playing->sofar + config->gap;
463 /* Nothing is playing but playing is enabled, so whatever is
464 * first in the queue can be expected to start immediately. */
467 for(q = qhead.next; q != &qhead; q = q->next) {
468 /* fill in estimated start time */
470 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
471 /* update for next track */
473 if((l = trackdb_get(q->track, "_length"))
474 && (length = atol(l)))
475 when += length + config->gap;
480 sink_writes(ev_writer_sink(c->w), ".\n");
481 return 1; /* completed */
484 static int output_list(struct conn *c, char **vec) {
486 sink_printf(ev_writer_sink(c->w), "%s\n", *vec++);
487 sink_writes(ev_writer_sink(c->w), ".\n");
491 static int files_dirs(struct conn *c,
494 enum trackdb_listable what) {
495 const char *dir, *re, *errstr;
501 case 0: dir = 0; re = 0; break;
502 case 1: dir = vec[0]; re = 0; break;
503 case 2: dir = vec[0]; re = vec[1]; break;
506 /* A bit of a bodge to make sure the args don't trample on cache keys */
507 if(dir && strchr(dir, '\n')) {
508 sink_writes(ev_writer_sink(c->w), "550 invalid directory name\n");
511 if(re && strchr(re, '\n')) {
512 sink_writes(ev_writer_sink(c->w), "550 invalid regexp\n");
515 /* We bother eliminating "" because the web interface is relatively
516 * likely to send it */
518 byte_xasprintf(&key, "%d\n%s\n%s", (int)what, dir ? dir : "", re);
519 fvec = (char **)cache_get(&cache_files_type, key);
521 /* Got a cache hit, don't store the answer in the cache */
524 rec = 0; /* quieten compiler */
526 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
528 if(!(rec = pcre_compile(re, PCRE_CASELESS|PCRE_UTF8,
529 &errstr, &erroffset, 0))) {
530 sink_printf(ev_writer_sink(c->w), "550 Error compiling regexp: %s\n",
534 /* It only counts as a miss if the regexp was valid. */
535 ++cache_files_misses;
538 /* No regexp, don't bother caching the result */
544 /* No cache hit (either because a miss, or because we did not look) so do
547 fvec = trackdb_list(dir, 0, what, rec);
549 fvec = trackdb_list(0, 0, what, rec);
552 /* Put the answer in the cache */
553 cache_put(&cache_files_type, key, fvec);
554 sink_writes(ev_writer_sink(c->w), "253 Listing follow\n");
555 return output_list(c, fvec);
558 static int c_files(struct conn *c,
561 return files_dirs(c, vec, nvec, trackdb_files);
564 static int c_dirs(struct conn *c,
567 return files_dirs(c, vec, nvec, trackdb_directories);
570 static int c_allfiles(struct conn *c,
573 return files_dirs(c, vec, nvec, trackdb_directories|trackdb_files);
576 static int c_get(struct conn *c,
578 int attribute((unused)) nvec) {
581 if(vec[1][0] != '_' && (v = trackdb_get(vec[0], vec[1])))
582 sink_printf(ev_writer_sink(c->w), "252 %s\n", v);
584 sink_writes(ev_writer_sink(c->w), "550 not found\n");
588 static int c_length(struct conn *c,
590 int attribute((unused)) nvec) {
591 const char *track, *v;
593 if(!(track = trackdb_resolve(vec[0]))) {
594 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
597 if((v = trackdb_get(track, "_length")))
598 sink_printf(ev_writer_sink(c->w), "252 %s\n", v);
600 sink_writes(ev_writer_sink(c->w), "550 not found\n");
604 static int c_set(struct conn *c,
606 int attribute((unused)) nvec) {
607 if(vec[1][0] != '_' && !trackdb_set(vec[0], vec[1], vec[2]))
608 sink_writes(ev_writer_sink(c->w), "250 OK\n");
610 sink_writes(ev_writer_sink(c->w), "550 not found\n");
614 static int c_prefs(struct conn *c,
616 int attribute((unused)) nvec) {
619 k = trackdb_get_all(vec[0]);
620 sink_writes(ev_writer_sink(c->w), "253 prefs follow\n");
621 for(; k; k = k->next)
622 if(k->name[0] != '_') /* omit internal values */
623 sink_printf(ev_writer_sink(c->w),
624 " %s %s\n", quoteutf8(k->name), quoteutf8(k->value));
625 sink_writes(ev_writer_sink(c->w), ".\n");
629 static int c_exists(struct conn *c,
631 int attribute((unused)) nvec) {
632 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]);
636 static void search_parse_error(const char *msg, void *u) {
637 *(const char **)u = msg;
640 static int c_search(struct conn *c,
642 int attribute((unused)) nvec) {
643 char **terms, **results;
644 int nterms, nresults, n;
645 const char *e = "unknown error";
647 /* This is a bit of a bodge. Initially it's there to make the eclient
648 * interface a bit more convenient to add searching to, but it has the more
649 * compelling advantage that if everything uses it, then interpretation of
650 * user-supplied search strings will be the same everywhere. */
651 if(!(terms = split(vec[0], &nterms, SPLIT_QUOTES, search_parse_error, &e))) {
652 sink_printf(ev_writer_sink(c->w), "550 %s\n", e);
654 results = trackdb_search(terms, nterms, &nresults);
655 sink_printf(ev_writer_sink(c->w), "253 %d matches\n", nresults);
656 for(n = 0; n < nresults; ++n)
657 sink_printf(ev_writer_sink(c->w), "%s\n", results[n]);
658 sink_writes(ev_writer_sink(c->w), ".\n");
663 static int c_random_enable(struct conn *c,
664 char attribute((unused)) **vec,
665 int attribute((unused)) nvec) {
666 enable_random(c->who, c->ev);
667 /* Enable implicitly unpauses if there is nothing playing */
668 if(paused && !playing) resume_playing(c->who);
669 sink_writes(ev_writer_sink(c->w), "250 OK\n");
670 return 1; /* completed */
673 static int c_random_disable(struct conn *c,
674 char attribute((unused)) **vec,
675 int attribute((unused)) nvec) {
676 disable_random(c->who);
677 sink_writes(ev_writer_sink(c->w), "250 OK\n");
678 return 1; /* completed */
681 static int c_random_enabled(struct conn *c,
682 char attribute((unused)) **vec,
683 int attribute((unused)) nvec) {
684 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[random_is_enabled()]);
685 return 1; /* completed */
688 static void got_stats(char *stats, void *u) {
689 struct conn *const c = u;
691 sink_printf(ev_writer_sink(c->w), "253 stats\n%s\n.\n", stats);
692 /* Now we can start processing commands again */
693 ev_reader_enable(c->r);
696 static int c_stats(struct conn *c,
697 char attribute((unused)) **vec,
698 int attribute((unused)) nvec) {
699 trackdb_stats_subprocess(c->ev, got_stats, c);
700 return 0; /* not yet complete */
703 static int c_volume(struct conn *c,
714 l = r = atoi(vec[0]);
725 if(mixer_control(&l, &r, set))
726 sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n");
728 sink_printf(ev_writer_sink(c->w), "252 %d %d\n", l, r);
729 if(l != volume_left || r != volume_right) {
732 snprintf(lb, sizeof lb, "%d", l);
733 snprintf(rb, sizeof rb, "%d", r);
734 eventlog("volume", lb, rb, (char *)0);
740 /** @brief Called when data arrives on a log connection
742 * We just discard all such data. The client may occasionally send data as a
745 static int logging_reader_callback(ev_source attribute((unused)) *ev,
747 void attribute((unused)) *ptr,
749 int attribute((unused)) eof,
750 void attribute((unused)) *u) {
753 ev_reader_consume(reader, bytes);
755 /* Oops, that's all for now */
756 info("logging reader eof");
758 info("close writer");
759 ev_writer_close(c->w);
767 static void logclient(const char *msg, void *user) {
768 struct conn *c = user;
771 /* This connection has gone up in smoke for some reason */
772 eventlog_remove(c->lo);
775 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" %s\n",
776 (uintmax_t)time(0), msg);
779 static int c_log(struct conn *c,
780 char attribute((unused)) **vec,
781 int attribute((unused)) nvec) {
784 sink_writes(ev_writer_sink(c->w), "254 OK\n");
785 /* pump out initial state */
787 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
789 playing_is_enabled() ? "enable_play" : "disable_play");
790 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
792 random_is_enabled() ? "enable_random" : "disable_random");
793 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
795 paused ? "pause" : "resume");
797 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state playing\n",
800 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" volume %d %d\n",
801 (uintmax_t)now, volume_left, volume_right);
802 c->lo = xmalloc(sizeof *c->lo);
803 c->lo->fn = logclient;
806 c->reader = logging_reader_callback;
810 static void post_move_cleanup(void) {
811 struct queue_entry *q;
813 /* If we have caused any random tracks to not be at the end then we make them
814 * no longer be random. */
815 for(q = qhead.next; q != &qhead; q = q->next)
816 if(q->state == playing_random && q->next != &qhead)
817 q->state = playing_unplayed;
818 /* That might mean we need to add a new random track. */
823 static int c_move(struct conn *c,
825 int attribute((unused)) nvec) {
826 struct queue_entry *q;
829 if(config->restrictions & RESTRICT_MOVE) {
831 sink_writes(ev_writer_sink(c->w),
832 "550 only trusted users can move tracks\n");
836 if(!(q = queue_find(vec[0]))) {
837 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
840 n = queue_move(q, atoi(vec[1]), c->who);
842 sink_printf(ev_writer_sink(c->w), "252 %d\n", n);
843 /* If we've moved to the head of the queue then prepare the track. */
849 static int c_moveafter(struct conn *c,
851 int attribute((unused)) nvec) {
852 struct queue_entry *q, **qs;
855 if(config->restrictions & RESTRICT_MOVE) {
857 sink_writes(ev_writer_sink(c->w),
858 "550 only trusted users can move tracks\n");
863 if(!(q = queue_find(vec[0]))) {
864 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
871 qs = xcalloc(nvec, sizeof *qs);
872 for(n = 0; n < nvec; ++n)
873 if(!(qs[n] = queue_find(vec[n]))) {
874 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
877 queue_moveafter(q, nvec, qs, c->who);
879 sink_printf(ev_writer_sink(c->w), "250 Moved tracks\n");
880 /* If we've moved to the head of the queue then prepare the track. */
886 static int c_part(struct conn *c,
888 int attribute((unused)) nvec) {
889 sink_printf(ev_writer_sink(c->w), "252 %s\n",
890 trackdb_getpart(vec[0], vec[1], vec[2]));
894 static int c_resolve(struct conn *c,
896 int attribute((unused)) nvec) {
899 if(!(track = trackdb_resolve(vec[0]))) {
900 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
903 sink_printf(ev_writer_sink(c->w), "252 %s\n", track);
907 static int c_tags(struct conn *c,
908 char attribute((unused)) **vec,
909 int attribute((unused)) nvec) {
910 char **tags = trackdb_alltags();
912 sink_printf(ev_writer_sink(c->w), "253 Tag list follows\n");
914 sink_printf(ev_writer_sink(c->w), "%s%s\n",
915 **tags == '.' ? "." : "", *tags);
918 sink_writes(ev_writer_sink(c->w), ".\n");
919 return 1; /* completed */
923 static int c_set_global(struct conn *c,
925 int attribute((unused)) nvec) {
926 trackdb_set_global(vec[0], vec[1], c->who);
927 sink_printf(ev_writer_sink(c->w), "250 OK\n");
931 static int c_get_global(struct conn *c,
933 int attribute((unused)) nvec) {
934 const char *s = trackdb_get_global(vec[0]);
937 sink_printf(ev_writer_sink(c->w), "252 %s\n", s);
939 sink_writes(ev_writer_sink(c->w), "550 not found\n");
943 static int c_nop(struct conn *c,
944 char attribute((unused)) **vec,
945 int attribute((unused)) nvec) {
946 sink_printf(ev_writer_sink(c->w), "250 Quack\n");
950 static int c_new(struct conn *c,
953 char **tracks = trackdb_new(0, nvec > 0 ? atoi(vec[0]) : INT_MAX);
955 sink_printf(ev_writer_sink(c->w), "253 New track list follows\n");
957 sink_printf(ev_writer_sink(c->w), "%s%s\n",
958 **tracks == '.' ? "." : "", *tracks);
961 sink_writes(ev_writer_sink(c->w), ".\n");
962 return 1; /* completed */
966 static int c_rtp_address(struct conn *c,
967 char attribute((unused)) **vec,
968 int attribute((unused)) nvec) {
969 if(config->speaker_backend == BACKEND_NETWORK) {
970 sink_printf(ev_writer_sink(c->w), "252 %s %s\n",
971 quoteutf8(config->broadcast.s[0]),
972 quoteutf8(config->broadcast.s[1]));
974 sink_writes(ev_writer_sink(c->w), "550 No RTP\n");
978 #define C_AUTH 0001 /* must be authenticated */
979 #define C_TRUSTED 0002 /* must be trusted user */
981 static const struct command {
983 int minargs, maxargs;
984 int (*fn)(struct conn *, char **, int);
987 { "allfiles", 0, 2, c_allfiles, C_AUTH },
988 { "become", 1, 1, c_become, C_AUTH|C_TRUSTED },
989 { "dirs", 0, 2, c_dirs, C_AUTH },
990 { "disable", 0, 1, c_disable, C_AUTH },
991 { "enable", 0, 0, c_enable, C_AUTH },
992 { "enabled", 0, 0, c_enabled, C_AUTH },
993 { "exists", 1, 1, c_exists, C_AUTH },
994 { "files", 0, 2, c_files, C_AUTH },
995 { "get", 2, 2, c_get, C_AUTH },
996 { "get-global", 1, 1, c_get_global, C_AUTH },
997 { "length", 1, 1, c_length, C_AUTH },
998 { "log", 0, 0, c_log, C_AUTH },
999 { "move", 2, 2, c_move, C_AUTH },
1000 { "moveafter", 1, INT_MAX, c_moveafter, C_AUTH },
1001 { "new", 0, 1, c_new, C_AUTH },
1002 { "nop", 0, 0, c_nop, C_AUTH },
1003 { "part", 3, 3, c_part, C_AUTH },
1004 { "pause", 0, 0, c_pause, C_AUTH },
1005 { "play", 1, 1, c_play, C_AUTH },
1006 { "playing", 0, 0, c_playing, C_AUTH },
1007 { "prefs", 1, 1, c_prefs, C_AUTH },
1008 { "queue", 0, 0, c_queue, C_AUTH },
1009 { "random-disable", 0, 0, c_random_disable, C_AUTH },
1010 { "random-enable", 0, 0, c_random_enable, C_AUTH },
1011 { "random-enabled", 0, 0, c_random_enabled, C_AUTH },
1012 { "recent", 0, 0, c_recent, C_AUTH },
1013 { "reconfigure", 0, 0, c_reconfigure, C_AUTH|C_TRUSTED },
1014 { "remove", 1, 1, c_remove, C_AUTH },
1015 { "rescan", 0, 0, c_rescan, C_AUTH|C_TRUSTED },
1016 { "resolve", 1, 1, c_resolve, C_AUTH },
1017 { "resume", 0, 0, c_resume, C_AUTH },
1018 { "rtp-address", 0, 0, c_rtp_address, C_AUTH },
1019 { "scratch", 0, 1, c_scratch, C_AUTH },
1020 { "search", 1, 1, c_search, C_AUTH },
1021 { "set", 3, 3, c_set, C_AUTH, },
1022 { "set-global", 2, 2, c_set_global, C_AUTH },
1023 { "shutdown", 0, 0, c_shutdown, C_AUTH|C_TRUSTED },
1024 { "stats", 0, 0, c_stats, C_AUTH },
1025 { "tags", 0, 0, c_tags, C_AUTH },
1026 { "unset", 2, 2, c_set, C_AUTH },
1027 { "unset-global", 1, 1, c_set_global, C_AUTH },
1028 { "user", 2, 2, c_user, 0 },
1029 { "version", 0, 0, c_version, C_AUTH },
1030 { "volume", 0, 2, c_volume, C_AUTH }
1033 static void command_error(const char *msg, void *u) {
1036 sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg);
1039 /* process a command. Return 1 if complete, 0 if incomplete. */
1040 static int command(struct conn *c, char *line) {
1044 D(("server command %s", line));
1045 if(!(vec = split(line, &nvec, SPLIT_QUOTES, command_error, c))) {
1046 sink_writes(ev_writer_sink(c->w), "500 cannot parse command\n");
1050 sink_writes(ev_writer_sink(c->w), "500 do what?\n");
1053 if((n = TABLE_FIND(commands, struct command, name, vec[0])) < 0)
1054 sink_writes(ev_writer_sink(c->w), "500 unknown command\n");
1056 if((commands[n].flags & C_AUTH) && !c->who) {
1057 sink_writes(ev_writer_sink(c->w), "530 not authenticated\n");
1060 if((commands[n].flags & C_TRUSTED) && !trusted(c)) {
1061 sink_writes(ev_writer_sink(c->w), "530 insufficient privilege\n");
1066 if(nvec < commands[n].minargs) {
1067 sink_writes(ev_writer_sink(c->w), "500 missing argument(s)\n");
1070 if(nvec > commands[n].maxargs) {
1071 sink_writes(ev_writer_sink(c->w), "500 too many arguments\n");
1074 return commands[n].fn(c, vec, nvec);
1076 return 1; /* completed */
1079 /* redirect to the right reader callback for our current state */
1080 static int redirect_reader_callback(ev_source *ev,
1088 return c->reader(ev, reader, ptr, bytes, eof, u);
1091 /* the main command reader */
1092 static int reader_callback(ev_source attribute((unused)) *ev,
1102 D(("server reader_callback"));
1103 while((eol = memchr(ptr, '\n', bytes))) {
1105 ev_reader_consume(reader, eol - (char *)ptr);
1106 complete = command(c, ptr);
1107 bytes -= (eol - (char *)ptr);
1110 /* the command had better have set a new reader callback */
1112 /* there are further bytes to read, or we are at eof; arrange for the
1113 * command's reader callback to handle them */
1114 return ev_reader_incomplete(reader);
1115 /* nothing's going on right now */
1118 /* command completed, we can go around and handle the next one */
1122 error(0, "S%x unterminated line", c->tag);
1123 info("normal reader close");
1126 info("close associated writer");
1127 ev_writer_close(c->w);
1134 static int listen_callback(ev_source *ev,
1136 const struct sockaddr attribute((unused)) *remote,
1137 socklen_t attribute((unused)) rlen,
1139 const struct listener *l = u;
1140 struct conn *c = xmalloc(sizeof *c);
1141 static unsigned tags;
1143 D(("server listen_callback fd %d (%s)", fd, l->name));
1148 c->w = ev_writer_new(ev, fd, writer_error, c,
1150 c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c,
1154 c->reader = reader_callback;
1156 gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM);
1157 if(!strcmp(config->authorization_algorithm, "sha1")
1158 || !strcmp(config->authorization_algorithm, "SHA1")) {
1159 sink_printf(ev_writer_sink(c->w), "231 %s\n",
1160 hex(c->nonce, sizeof c->nonce));
1162 sink_printf(ev_writer_sink(c->w), "231 %s %s\n",
1163 config->authorization_algorithm,
1164 hex(c->nonce, sizeof c->nonce));
1169 int server_start(ev_source *ev, int pf,
1170 size_t socklen, const struct sockaddr *sa,
1173 struct listener *l = xmalloc(sizeof *l);
1174 static const int one = 1;
1176 D(("server_init socket %s", name));
1177 fd = xsocket(pf, SOCK_STREAM, 0);
1178 xsetsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
1179 if(bind(fd, sa, socklen) < 0) {
1180 error(errno, "error binding to %s", name);
1188 if(ev_listen(ev, fd, listen_callback, l, "server listener"))
1193 int server_stop(ev_source *ev, int fd) {
1195 return ev_listen_cancel(ev, fd);