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 S%x %d", c->tag, errno_value));
130 if(errno_value == 0) {
132 D(("S%x writer completed", c->tag));
134 if(errno_value != EPIPE)
135 error(errno_value, "S%x write error on socket", c->tag);
137 D(("cancel reader"));
138 ev_reader_cancel(c->r);
141 D(("done cancel reader"));
148 /** @brief Called when a conncetion's reader fails or is shut down
150 * If connection still has a writer then it is closed.
152 static int reader_error(ev_source attribute((unused)) *ev,
157 D(("server reader_error S%x %d", c->tag, errno_value));
158 error(errno_value, "S%x read error on socket", c->tag);
160 ev_writer_close(c->w);
167 /** @brief Return true if we are talking to a trusted user */
168 static int trusted(struct conn *c) {
171 for(n = 0; (n < config->trust.n
172 && strcmp(config->trust.s[n], c->who)); ++n)
174 return n < config->trust.n;
177 static int c_disable(struct conn *c, char **vec, int nvec) {
179 disable_playing(c->who);
180 else if(nvec == 1 && !strcmp(vec[0], "now"))
181 disable_playing(c->who);
183 sink_writes(ev_writer_sink(c->w), "550 invalid argument\n");
184 return 1; /* completed */
186 sink_writes(ev_writer_sink(c->w), "250 OK\n");
187 return 1; /* completed */
190 static int c_enable(struct conn *c,
191 char attribute((unused)) **vec,
192 int attribute((unused)) nvec) {
193 enable_playing(c->who, c->ev);
194 /* Enable implicitly unpauses if there is nothing playing */
195 if(paused && !playing) resume_playing(c->who);
196 sink_writes(ev_writer_sink(c->w), "250 OK\n");
197 return 1; /* completed */
200 static int c_enabled(struct conn *c,
201 char attribute((unused)) **vec,
202 int attribute((unused)) nvec) {
203 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[playing_is_enabled()]);
204 return 1; /* completed */
207 static int c_play(struct conn *c, char **vec,
208 int attribute((unused)) nvec) {
210 struct queue_entry *q;
212 if(!trackdb_exists(vec[0])) {
213 sink_writes(ev_writer_sink(c->w), "550 track is not in database\n");
216 if(!(track = trackdb_resolve(vec[0]))) {
217 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
220 q = queue_add(track, c->who, WHERE_BEFORE_RANDOM);
222 /* If we added the first track, and something is playing, then prepare the
223 * new track. If nothing is playing then we don't bother as it wouldn't gain
225 if(q == qhead.next && playing)
227 sink_writes(ev_writer_sink(c->w), "250 queued\n");
228 /* If the queue was empty but we are for some reason paused then
230 if(!playing) resume_playing(0);
232 return 1; /* completed */
235 static int c_remove(struct conn *c, char **vec,
236 int attribute((unused)) nvec) {
237 struct queue_entry *q;
239 if(!(q = queue_find(vec[0]))) {
240 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
243 if(config->restrictions & RESTRICT_REMOVE) {
244 /* can only remove tracks that you submitted */
245 if(!q->submitter || strcmp(q->submitter, c->who)) {
246 sink_writes(ev_writer_sink(c->w), "550 you didn't submit that track!\n");
250 queue_remove(q, c->who);
251 /* De-prepare the track. */
253 /* If we removed the random track then add another one. */
254 if(q->state == playing_random)
256 /* Prepare whatever the next head track is. */
257 if(qhead.next != &qhead)
258 prepare(c->ev, qhead.next);
260 sink_writes(ev_writer_sink(c->w), "250 removed\n");
261 return 1; /* completed */
264 static int c_scratch(struct conn *c,
268 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
269 return 1; /* completed */
271 if(config->restrictions & RESTRICT_SCRATCH) {
272 /* can only scratch tracks you submitted and randomly selected ones */
273 if(playing->submitter && strcmp(playing->submitter, c->who)) {
274 sink_writes(ev_writer_sink(c->w), "550 you didn't submit that track!\n");
278 scratch(c->who, nvec == 1 ? vec[0] : 0);
279 /* If you scratch an unpaused track then it is automatically unpaused */
281 sink_writes(ev_writer_sink(c->w), "250 scratched\n");
282 return 1; /* completed */
285 static int c_pause(struct conn *c,
286 char attribute((unused)) **vec,
287 int attribute((unused)) nvec) {
289 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
290 return 1; /* completed */
293 sink_writes(ev_writer_sink(c->w), "250 already paused\n");
294 return 1; /* completed */
296 if(pause_playing(c->who) < 0)
297 sink_writes(ev_writer_sink(c->w), "550 cannot pause this track\n");
299 sink_writes(ev_writer_sink(c->w), "250 paused\n");
303 static int c_resume(struct conn *c,
304 char attribute((unused)) **vec,
305 int attribute((unused)) nvec) {
307 sink_writes(ev_writer_sink(c->w), "250 not paused\n");
308 return 1; /* completed */
310 resume_playing(c->who);
311 sink_writes(ev_writer_sink(c->w), "250 paused\n");
315 static int c_shutdown(struct conn *c,
316 char attribute((unused)) **vec,
317 int attribute((unused)) nvec) {
318 info("S%x shut down by %s", c->tag, c->who);
319 sink_writes(ev_writer_sink(c->w), "250 shutting down\n");
320 ev_writer_flush(c->w);
324 static int c_reconfigure(struct conn *c,
325 char attribute((unused)) **vec,
326 int attribute((unused)) nvec) {
327 info("S%x reconfigure by %s", c->tag, c->who);
328 if(reconfigure(c->ev, 1))
329 sink_writes(ev_writer_sink(c->w), "550 error reading new config\n");
331 sink_writes(ev_writer_sink(c->w), "250 installed new config\n");
332 return 1; /* completed */
335 static int c_rescan(struct conn *c,
336 char attribute((unused)) **vec,
337 int attribute((unused)) nvec) {
338 info("S%x rescan by %s", c->tag, c->who);
339 trackdb_rescan(c->ev);
340 sink_writes(ev_writer_sink(c->w), "250 initiated rescan\n");
341 return 1; /* completed */
344 static int c_version(struct conn *c,
345 char attribute((unused)) **vec,
346 int attribute((unused)) nvec) {
347 /* VERSION had better only use the basic character set */
348 sink_printf(ev_writer_sink(c->w), "251 %s\n", disorder_version_string);
349 return 1; /* completed */
352 static int c_playing(struct conn *c,
353 char attribute((unused)) **vec,
354 int attribute((unused)) nvec) {
356 queue_fix_sofar(playing);
357 playing->expected = 0;
358 sink_printf(ev_writer_sink(c->w), "252 %s\n", queue_marshall(playing));
360 sink_printf(ev_writer_sink(c->w), "259 nothing playing\n");
361 return 1; /* completed */
364 static int c_become(struct conn *c,
366 int attribute((unused)) nvec) {
368 sink_writes(ev_writer_sink(c->w), "230 OK\n");
372 static int c_user(struct conn *c,
374 int attribute((unused)) nvec) {
379 struct sockaddr_in in;
380 struct sockaddr_in6 in6;
386 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
389 /* get connection data */
391 if(getpeername(c->fd, &u.sa, &l) < 0) {
392 error(errno, "S%x error calling getpeername", c->tag);
393 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
396 if(c->l->pf != PF_UNIX) {
397 if((n = getnameinfo(&u.sa, l,
398 host, sizeof host, 0, 0, NI_NUMERICHOST))) {
399 error(0, "S%x error calling getnameinfo: %s", c->tag, gai_strerror(n));
400 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
404 strcpy(host, "local");
406 for(n = 0; n < config->allow.n
407 && strcmp(config->allow.s[n].s[0], vec[0]); ++n)
409 /* if it's a real user check whether the response is right */
410 if(n >= config->allow.n) {
411 info("S%x unknown user '%s' from %s", c->tag, vec[0], host);
412 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
415 res = authhash(c->nonce, sizeof c->nonce, config->allow.s[n].s[1],
416 config->authorization_algorithm);
417 if(wideopen || (res && !strcmp(res, vec[1]))) {
419 /* currently we only bother logging remote connections */
420 if(c->l->pf != PF_UNIX)
421 info("S%x %s connected from %s", c->tag, vec[0], host);
422 sink_writes(ev_writer_sink(c->w), "230 OK\n");
425 /* oops, response was wrong */
426 info("S%x authentication failure for %s from %s", c->tag, vec[0], host);
427 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
431 static int c_recent(struct conn *c,
432 char attribute((unused)) **vec,
433 int attribute((unused)) nvec) {
434 const struct queue_entry *q;
436 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
437 for(q = phead.next; q != &phead; q = q->next)
438 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
439 sink_writes(ev_writer_sink(c->w), ".\n");
440 return 1; /* completed */
443 static int c_queue(struct conn *c,
444 char attribute((unused)) **vec,
445 int attribute((unused)) nvec) {
446 struct queue_entry *q;
451 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
452 if(playing_is_enabled() && !paused) {
454 queue_fix_sofar(playing);
455 if((l = trackdb_get(playing->track, "_length"))
456 && (length = atol(l))) {
458 when += length - playing->sofar + config->gap;
461 /* Nothing is playing but playing is enabled, so whatever is
462 * first in the queue can be expected to start immediately. */
465 for(q = qhead.next; q != &qhead; q = q->next) {
466 /* fill in estimated start time */
468 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
469 /* update for next track */
471 if((l = trackdb_get(q->track, "_length"))
472 && (length = atol(l)))
473 when += length + config->gap;
478 sink_writes(ev_writer_sink(c->w), ".\n");
479 return 1; /* completed */
482 static int output_list(struct conn *c, char **vec) {
484 sink_printf(ev_writer_sink(c->w), "%s\n", *vec++);
485 sink_writes(ev_writer_sink(c->w), ".\n");
489 static int files_dirs(struct conn *c,
492 enum trackdb_listable what) {
493 const char *dir, *re, *errstr;
499 case 0: dir = 0; re = 0; break;
500 case 1: dir = vec[0]; re = 0; break;
501 case 2: dir = vec[0]; re = vec[1]; break;
504 /* A bit of a bodge to make sure the args don't trample on cache keys */
505 if(dir && strchr(dir, '\n')) {
506 sink_writes(ev_writer_sink(c->w), "550 invalid directory name\n");
509 if(re && strchr(re, '\n')) {
510 sink_writes(ev_writer_sink(c->w), "550 invalid regexp\n");
513 /* We bother eliminating "" because the web interface is relatively
514 * likely to send it */
516 byte_xasprintf(&key, "%d\n%s\n%s", (int)what, dir ? dir : "", re);
517 fvec = (char **)cache_get(&cache_files_type, key);
519 /* Got a cache hit, don't store the answer in the cache */
522 rec = 0; /* quieten compiler */
524 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
526 if(!(rec = pcre_compile(re, PCRE_CASELESS|PCRE_UTF8,
527 &errstr, &erroffset, 0))) {
528 sink_printf(ev_writer_sink(c->w), "550 Error compiling regexp: %s\n",
532 /* It only counts as a miss if the regexp was valid. */
533 ++cache_files_misses;
536 /* No regexp, don't bother caching the result */
542 /* No cache hit (either because a miss, or because we did not look) so do
545 fvec = trackdb_list(dir, 0, what, rec);
547 fvec = trackdb_list(0, 0, what, rec);
550 /* Put the answer in the cache */
551 cache_put(&cache_files_type, key, fvec);
552 sink_writes(ev_writer_sink(c->w), "253 Listing follow\n");
553 return output_list(c, fvec);
556 static int c_files(struct conn *c,
559 return files_dirs(c, vec, nvec, trackdb_files);
562 static int c_dirs(struct conn *c,
565 return files_dirs(c, vec, nvec, trackdb_directories);
568 static int c_allfiles(struct conn *c,
571 return files_dirs(c, vec, nvec, trackdb_directories|trackdb_files);
574 static int c_get(struct conn *c,
576 int attribute((unused)) nvec) {
579 if(vec[1][0] != '_' && (v = trackdb_get(vec[0], vec[1])))
580 sink_printf(ev_writer_sink(c->w), "252 %s\n", v);
582 sink_writes(ev_writer_sink(c->w), "550 not found\n");
586 static int c_length(struct conn *c,
588 int attribute((unused)) nvec) {
589 const char *track, *v;
591 if(!(track = trackdb_resolve(vec[0]))) {
592 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
595 if((v = trackdb_get(track, "_length")))
596 sink_printf(ev_writer_sink(c->w), "252 %s\n", v);
598 sink_writes(ev_writer_sink(c->w), "550 not found\n");
602 static int c_set(struct conn *c,
604 int attribute((unused)) nvec) {
605 if(vec[1][0] != '_' && !trackdb_set(vec[0], vec[1], vec[2]))
606 sink_writes(ev_writer_sink(c->w), "250 OK\n");
608 sink_writes(ev_writer_sink(c->w), "550 not found\n");
612 static int c_prefs(struct conn *c,
614 int attribute((unused)) nvec) {
617 k = trackdb_get_all(vec[0]);
618 sink_writes(ev_writer_sink(c->w), "253 prefs follow\n");
619 for(; k; k = k->next)
620 if(k->name[0] != '_') /* omit internal values */
621 sink_printf(ev_writer_sink(c->w),
622 " %s %s\n", quoteutf8(k->name), quoteutf8(k->value));
623 sink_writes(ev_writer_sink(c->w), ".\n");
627 static int c_exists(struct conn *c,
629 int attribute((unused)) nvec) {
630 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]);
634 static void search_parse_error(const char *msg, void *u) {
635 *(const char **)u = msg;
638 static int c_search(struct conn *c,
640 int attribute((unused)) nvec) {
641 char **terms, **results;
642 int nterms, nresults, n;
643 const char *e = "unknown error";
645 /* This is a bit of a bodge. Initially it's there to make the eclient
646 * interface a bit more convenient to add searching to, but it has the more
647 * compelling advantage that if everything uses it, then interpretation of
648 * user-supplied search strings will be the same everywhere. */
649 if(!(terms = split(vec[0], &nterms, SPLIT_QUOTES, search_parse_error, &e))) {
650 sink_printf(ev_writer_sink(c->w), "550 %s\n", e);
652 results = trackdb_search(terms, nterms, &nresults);
653 sink_printf(ev_writer_sink(c->w), "253 %d matches\n", nresults);
654 for(n = 0; n < nresults; ++n)
655 sink_printf(ev_writer_sink(c->w), "%s\n", results[n]);
656 sink_writes(ev_writer_sink(c->w), ".\n");
661 static int c_random_enable(struct conn *c,
662 char attribute((unused)) **vec,
663 int attribute((unused)) nvec) {
664 enable_random(c->who, c->ev);
665 /* Enable implicitly unpauses if there is nothing playing */
666 if(paused && !playing) resume_playing(c->who);
667 sink_writes(ev_writer_sink(c->w), "250 OK\n");
668 return 1; /* completed */
671 static int c_random_disable(struct conn *c,
672 char attribute((unused)) **vec,
673 int attribute((unused)) nvec) {
674 disable_random(c->who);
675 sink_writes(ev_writer_sink(c->w), "250 OK\n");
676 return 1; /* completed */
679 static int c_random_enabled(struct conn *c,
680 char attribute((unused)) **vec,
681 int attribute((unused)) nvec) {
682 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[random_is_enabled()]);
683 return 1; /* completed */
686 static void got_stats(char *stats, void *u) {
687 struct conn *const c = u;
689 sink_printf(ev_writer_sink(c->w), "253 stats\n%s\n.\n", stats);
690 /* Now we can start processing commands again */
691 ev_reader_enable(c->r);
694 static int c_stats(struct conn *c,
695 char attribute((unused)) **vec,
696 int attribute((unused)) nvec) {
697 trackdb_stats_subprocess(c->ev, got_stats, c);
698 return 0; /* not yet complete */
701 static int c_volume(struct conn *c,
712 l = r = atoi(vec[0]);
723 if(mixer_control(&l, &r, set))
724 sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n");
726 sink_printf(ev_writer_sink(c->w), "252 %d %d\n", l, r);
727 if(l != volume_left || r != volume_right) {
730 snprintf(lb, sizeof lb, "%d", l);
731 snprintf(rb, sizeof rb, "%d", r);
732 eventlog("volume", lb, rb, (char *)0);
738 /** @brief Called when data arrives on a log connection
740 * We just discard all such data. The client may occasionally send data as a
743 static int logging_reader_callback(ev_source attribute((unused)) *ev,
745 void attribute((unused)) *ptr,
747 int attribute((unused)) eof,
748 void attribute((unused)) *u) {
751 ev_reader_consume(reader, bytes);
753 /* Oops, that's all for now */
754 D(("logging reader eof"));
757 ev_writer_close(c->w);
765 static void logclient(const char *msg, void *user) {
766 struct conn *c = user;
769 /* This connection has gone up in smoke for some reason */
770 eventlog_remove(c->lo);
773 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" %s\n",
774 (uintmax_t)time(0), msg);
777 static int c_log(struct conn *c,
778 char attribute((unused)) **vec,
779 int attribute((unused)) nvec) {
782 sink_writes(ev_writer_sink(c->w), "254 OK\n");
783 /* pump out initial state */
785 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
787 playing_is_enabled() ? "enable_play" : "disable_play");
788 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
790 random_is_enabled() ? "enable_random" : "disable_random");
791 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
793 paused ? "pause" : "resume");
795 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state playing\n",
798 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" volume %d %d\n",
799 (uintmax_t)now, volume_left, volume_right);
800 c->lo = xmalloc(sizeof *c->lo);
801 c->lo->fn = logclient;
804 c->reader = logging_reader_callback;
808 static int c_move(struct conn *c,
810 int attribute((unused)) nvec) {
811 struct queue_entry *q;
814 if(config->restrictions & RESTRICT_MOVE) {
816 sink_writes(ev_writer_sink(c->w),
817 "550 only trusted users can move tracks\n");
821 if(!(q = queue_find(vec[0]))) {
822 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
825 n = queue_move(q, atoi(vec[1]), c->who);
826 sink_printf(ev_writer_sink(c->w), "252 %d\n", n);
827 /* If we've moved to the head of the queue then prepare the track. */
833 static int c_moveafter(struct conn *c,
835 int attribute((unused)) nvec) {
836 struct queue_entry *q, **qs;
839 if(config->restrictions & RESTRICT_MOVE) {
841 sink_writes(ev_writer_sink(c->w),
842 "550 only trusted users can move tracks\n");
847 if(!(q = queue_find(vec[0]))) {
848 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
855 qs = xcalloc(nvec, sizeof *qs);
856 for(n = 0; n < nvec; ++n)
857 if(!(qs[n] = queue_find(vec[n]))) {
858 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
861 queue_moveafter(q, nvec, qs, c->who);
862 sink_printf(ev_writer_sink(c->w), "250 Moved tracks\n");
863 /* If we've moved to the head of the queue then prepare the track. */
869 static int c_part(struct conn *c,
871 int attribute((unused)) nvec) {
872 sink_printf(ev_writer_sink(c->w), "252 %s\n",
873 trackdb_getpart(vec[0], vec[1], vec[2]));
877 static int c_resolve(struct conn *c,
879 int attribute((unused)) nvec) {
882 if(!(track = trackdb_resolve(vec[0]))) {
883 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
886 sink_printf(ev_writer_sink(c->w), "252 %s\n", track);
890 static int c_tags(struct conn *c,
891 char attribute((unused)) **vec,
892 int attribute((unused)) nvec) {
893 char **tags = trackdb_alltags();
895 sink_printf(ev_writer_sink(c->w), "253 Tag list follows\n");
897 sink_printf(ev_writer_sink(c->w), "%s%s\n",
898 **tags == '.' ? "." : "", *tags);
901 sink_writes(ev_writer_sink(c->w), ".\n");
902 return 1; /* completed */
906 static int c_set_global(struct conn *c,
908 int attribute((unused)) nvec) {
909 trackdb_set_global(vec[0], vec[1], c->who);
910 sink_printf(ev_writer_sink(c->w), "250 OK\n");
914 static int c_get_global(struct conn *c,
916 int attribute((unused)) nvec) {
917 const char *s = trackdb_get_global(vec[0]);
920 sink_printf(ev_writer_sink(c->w), "252 %s\n", s);
922 sink_writes(ev_writer_sink(c->w), "550 not found\n");
926 static int c_nop(struct conn *c,
927 char attribute((unused)) **vec,
928 int attribute((unused)) nvec) {
929 sink_printf(ev_writer_sink(c->w), "250 Quack\n");
933 static int c_new(struct conn *c,
936 char **tracks = trackdb_new(0, nvec > 0 ? atoi(vec[0]) : INT_MAX);
938 sink_printf(ev_writer_sink(c->w), "253 New track list follows\n");
940 sink_printf(ev_writer_sink(c->w), "%s%s\n",
941 **tracks == '.' ? "." : "", *tracks);
944 sink_writes(ev_writer_sink(c->w), ".\n");
945 return 1; /* completed */
949 static int c_rtp_address(struct conn *c,
950 char attribute((unused)) **vec,
951 int attribute((unused)) nvec) {
952 if(config->speaker_backend == BACKEND_NETWORK) {
953 sink_printf(ev_writer_sink(c->w), "252 %s %s\n",
954 quoteutf8(config->broadcast.s[0]),
955 quoteutf8(config->broadcast.s[1]));
957 sink_writes(ev_writer_sink(c->w), "550 No RTP\n");
961 #define C_AUTH 0001 /* must be authenticated */
962 #define C_TRUSTED 0002 /* must be trusted user */
964 static const struct command {
966 int minargs, maxargs;
967 int (*fn)(struct conn *, char **, int);
970 { "allfiles", 0, 2, c_allfiles, C_AUTH },
971 { "become", 1, 1, c_become, C_AUTH|C_TRUSTED },
972 { "dirs", 0, 2, c_dirs, C_AUTH },
973 { "disable", 0, 1, c_disable, C_AUTH },
974 { "enable", 0, 0, c_enable, C_AUTH },
975 { "enabled", 0, 0, c_enabled, C_AUTH },
976 { "exists", 1, 1, c_exists, C_AUTH },
977 { "files", 0, 2, c_files, C_AUTH },
978 { "get", 2, 2, c_get, C_AUTH },
979 { "get-global", 1, 1, c_get_global, C_AUTH },
980 { "length", 1, 1, c_length, C_AUTH },
981 { "log", 0, 0, c_log, C_AUTH },
982 { "move", 2, 2, c_move, C_AUTH },
983 { "moveafter", 1, INT_MAX, c_moveafter, C_AUTH },
984 { "new", 0, 1, c_new, C_AUTH },
985 { "nop", 0, 0, c_nop, C_AUTH },
986 { "part", 3, 3, c_part, C_AUTH },
987 { "pause", 0, 0, c_pause, C_AUTH },
988 { "play", 1, 1, c_play, C_AUTH },
989 { "playing", 0, 0, c_playing, C_AUTH },
990 { "prefs", 1, 1, c_prefs, C_AUTH },
991 { "queue", 0, 0, c_queue, C_AUTH },
992 { "random-disable", 0, 0, c_random_disable, C_AUTH },
993 { "random-enable", 0, 0, c_random_enable, C_AUTH },
994 { "random-enabled", 0, 0, c_random_enabled, C_AUTH },
995 { "recent", 0, 0, c_recent, C_AUTH },
996 { "reconfigure", 0, 0, c_reconfigure, C_AUTH|C_TRUSTED },
997 { "remove", 1, 1, c_remove, C_AUTH },
998 { "rescan", 0, 0, c_rescan, C_AUTH|C_TRUSTED },
999 { "resolve", 1, 1, c_resolve, C_AUTH },
1000 { "resume", 0, 0, c_resume, C_AUTH },
1001 { "rtp-address", 0, 0, c_rtp_address, C_AUTH },
1002 { "scratch", 0, 1, c_scratch, C_AUTH },
1003 { "search", 1, 1, c_search, C_AUTH },
1004 { "set", 3, 3, c_set, C_AUTH, },
1005 { "set-global", 2, 2, c_set_global, C_AUTH },
1006 { "shutdown", 0, 0, c_shutdown, C_AUTH|C_TRUSTED },
1007 { "stats", 0, 0, c_stats, C_AUTH },
1008 { "tags", 0, 0, c_tags, C_AUTH },
1009 { "unset", 2, 2, c_set, C_AUTH },
1010 { "unset-global", 1, 1, c_set_global, C_AUTH },
1011 { "user", 2, 2, c_user, 0 },
1012 { "version", 0, 0, c_version, C_AUTH },
1013 { "volume", 0, 2, c_volume, C_AUTH }
1016 static void command_error(const char *msg, void *u) {
1019 sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg);
1022 /* process a command. Return 1 if complete, 0 if incomplete. */
1023 static int command(struct conn *c, char *line) {
1027 D(("server command %s", line));
1028 if(!(vec = split(line, &nvec, SPLIT_QUOTES, command_error, c))) {
1029 sink_writes(ev_writer_sink(c->w), "500 cannot parse command\n");
1033 sink_writes(ev_writer_sink(c->w), "500 do what?\n");
1036 if((n = TABLE_FIND(commands, struct command, name, vec[0])) < 0)
1037 sink_writes(ev_writer_sink(c->w), "500 unknown command\n");
1039 if((commands[n].flags & C_AUTH) && !c->who) {
1040 sink_writes(ev_writer_sink(c->w), "530 not authenticated\n");
1043 if((commands[n].flags & C_TRUSTED) && !trusted(c)) {
1044 sink_writes(ev_writer_sink(c->w), "530 insufficient privilege\n");
1049 if(nvec < commands[n].minargs) {
1050 sink_writes(ev_writer_sink(c->w), "500 missing argument(s)\n");
1053 if(nvec > commands[n].maxargs) {
1054 sink_writes(ev_writer_sink(c->w), "500 too many arguments\n");
1057 return commands[n].fn(c, vec, nvec);
1059 return 1; /* completed */
1062 /* redirect to the right reader callback for our current state */
1063 static int redirect_reader_callback(ev_source *ev,
1071 return c->reader(ev, reader, ptr, bytes, eof, u);
1074 /* the main command reader */
1075 static int reader_callback(ev_source attribute((unused)) *ev,
1085 D(("server reader_callback"));
1086 while((eol = memchr(ptr, '\n', bytes))) {
1088 ev_reader_consume(reader, eol - (char *)ptr);
1089 complete = command(c, ptr);
1090 bytes -= (eol - (char *)ptr);
1093 /* the command had better have set a new reader callback */
1095 /* there are further bytes to read, or we are at eof; arrange for the
1096 * command's reader callback to handle them */
1097 return ev_reader_incomplete(reader);
1098 /* nothing's going on right now */
1101 /* command completed, we can go around and handle the next one */
1105 error(0, "S%x unterminated line", c->tag);
1106 D(("normal reader close"));
1109 D(("close associated writer"));
1110 ev_writer_close(c->w);
1117 static int listen_callback(ev_source *ev,
1119 const struct sockaddr attribute((unused)) *remote,
1120 socklen_t attribute((unused)) rlen,
1122 const struct listener *l = u;
1123 struct conn *c = xmalloc(sizeof *c);
1124 static unsigned tags;
1126 D(("server listen_callback fd %d (%s)", fd, l->name));
1131 c->w = ev_writer_new(ev, fd, writer_error, c,
1133 c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c,
1137 c->reader = reader_callback;
1139 gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM);
1140 if(!strcmp(config->authorization_algorithm, "sha1")
1141 || !strcmp(config->authorization_algorithm, "SHA1")) {
1142 sink_printf(ev_writer_sink(c->w), "231 %s\n",
1143 hex(c->nonce, sizeof c->nonce));
1145 sink_printf(ev_writer_sink(c->w), "231 %s %s\n",
1146 config->authorization_algorithm,
1147 hex(c->nonce, sizeof c->nonce));
1152 int server_start(ev_source *ev, int pf,
1153 size_t socklen, const struct sockaddr *sa,
1156 struct listener *l = xmalloc(sizeof *l);
1157 static const int one = 1;
1159 D(("server_init socket %s", name));
1160 fd = xsocket(pf, SOCK_STREAM, 0);
1161 xsetsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
1162 if(bind(fd, sa, socklen) < 0) {
1163 error(errno, "error binding to %s", name);
1171 if(ev_listen(ev, fd, listen_callback, l, "server listener"))
1176 int server_stop(ev_source *ev, int fd) {
1178 return ev_listen_cancel(ev, fd);