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"
69 # define NONCE_SIZE 16
72 int volume_left, volume_right; /* last known volume */
74 /** @brief Accept all well-formed login attempts
85 /** @brief One client connection */
87 /** @brief Read commands from here */
89 /** @brief Send responses to here */
91 /** @brief Underlying file descriptor */
93 /** @brief Unique identifier for connection used in log messages */
95 /** @brief Login name or NULL */
97 /** @brief Event loop */
99 /** @brief Nonce chosen for this connection */
100 unsigned char nonce[NONCE_SIZE];
101 /** @brief Current reader callback
103 * We change this depending on whether we're servicing the @b log command
105 ev_reader_callback *reader;
106 /** @brief Event log output sending to this connection */
107 struct eventlog_output *lo;
108 /** @brief Parent listener */
109 const struct listener *l;
112 static int reader_callback(ev_source *ev,
119 static const char *noyes[] = { "no", "yes" };
121 /** @brief Called when a connection's writer fails or is shut down
123 * If the connection still has a raeder that is cancelled.
125 static int writer_error(ev_source attribute((unused)) *ev,
130 D(("server writer_error S%x %d", c->tag, errno_value));
131 if(errno_value == 0) {
133 D(("S%x writer completed", c->tag));
135 if(errno_value != EPIPE)
136 error(errno_value, "S%x write error on socket", c->tag);
138 D(("cancel reader"));
139 ev_reader_cancel(c->r);
142 D(("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 S%x %d", c->tag, errno_value));
159 error(errno_value, "S%x read error on socket", c->tag);
161 ev_writer_close(c->w);
168 /** @brief Return true if we are talking to a trusted user */
169 static int trusted(struct conn *c) {
172 for(n = 0; (n < config->trust.n
173 && strcmp(config->trust.s[n], c->who)); ++n)
175 return n < config->trust.n;
178 static int c_disable(struct conn *c, char **vec, int nvec) {
180 disable_playing(c->who);
181 else if(nvec == 1 && !strcmp(vec[0], "now"))
182 disable_playing(c->who);
184 sink_writes(ev_writer_sink(c->w), "550 invalid argument\n");
185 return 1; /* completed */
187 sink_writes(ev_writer_sink(c->w), "250 OK\n");
188 return 1; /* completed */
191 static int c_enable(struct conn *c,
192 char attribute((unused)) **vec,
193 int attribute((unused)) nvec) {
194 enable_playing(c->who, c->ev);
195 /* Enable implicitly unpauses if there is nothing playing */
196 if(paused && !playing) resume_playing(c->who);
197 sink_writes(ev_writer_sink(c->w), "250 OK\n");
198 return 1; /* completed */
201 static int c_enabled(struct conn *c,
202 char attribute((unused)) **vec,
203 int attribute((unused)) nvec) {
204 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[playing_is_enabled()]);
205 return 1; /* completed */
208 static int c_play(struct conn *c, char **vec,
209 int attribute((unused)) nvec) {
211 struct queue_entry *q;
213 if(!trackdb_exists(vec[0])) {
214 sink_writes(ev_writer_sink(c->w), "550 track is not in database\n");
217 if(!(track = trackdb_resolve(vec[0]))) {
218 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
221 q = queue_add(track, c->who, WHERE_BEFORE_RANDOM);
223 /* If we added the first track, and something is playing, then prepare the
224 * new track. If nothing is playing then we don't bother as it wouldn't gain
226 if(q == qhead.next && playing)
228 sink_writes(ev_writer_sink(c->w), "250 queued\n");
229 /* If the queue was empty but we are for some reason paused then
231 if(!playing) resume_playing(0);
233 return 1; /* completed */
236 static int c_remove(struct conn *c, char **vec,
237 int attribute((unused)) nvec) {
238 struct queue_entry *q;
240 if(!(q = queue_find(vec[0]))) {
241 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
244 if(config->restrictions & RESTRICT_REMOVE) {
245 /* can only remove tracks that you submitted */
246 if(!q->submitter || strcmp(q->submitter, c->who)) {
247 sink_writes(ev_writer_sink(c->w), "550 you didn't submit that track!\n");
251 queue_remove(q, c->who);
252 /* De-prepare the track. */
254 /* If we removed the random track then add another one. */
255 if(q->state == playing_random)
257 /* Prepare whatever the next head track is. */
258 if(qhead.next != &qhead)
259 prepare(c->ev, qhead.next);
261 sink_writes(ev_writer_sink(c->w), "250 removed\n");
262 return 1; /* completed */
265 static int c_scratch(struct conn *c,
269 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
270 return 1; /* completed */
272 if(config->restrictions & RESTRICT_SCRATCH) {
273 /* can only scratch tracks you submitted and randomly selected ones */
274 if(playing->submitter && strcmp(playing->submitter, c->who)) {
275 sink_writes(ev_writer_sink(c->w), "550 you didn't submit that track!\n");
279 scratch(c->who, nvec == 1 ? vec[0] : 0);
280 /* If you scratch an unpaused track then it is automatically unpaused */
282 sink_writes(ev_writer_sink(c->w), "250 scratched\n");
283 return 1; /* completed */
286 static int c_pause(struct conn *c,
287 char attribute((unused)) **vec,
288 int attribute((unused)) nvec) {
290 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
291 return 1; /* completed */
294 sink_writes(ev_writer_sink(c->w), "250 already paused\n");
295 return 1; /* completed */
297 if(pause_playing(c->who) < 0)
298 sink_writes(ev_writer_sink(c->w), "550 cannot pause this track\n");
300 sink_writes(ev_writer_sink(c->w), "250 paused\n");
304 static int c_resume(struct conn *c,
305 char attribute((unused)) **vec,
306 int attribute((unused)) nvec) {
308 sink_writes(ev_writer_sink(c->w), "250 not paused\n");
309 return 1; /* completed */
311 resume_playing(c->who);
312 sink_writes(ev_writer_sink(c->w), "250 paused\n");
316 static int c_shutdown(struct conn *c,
317 char attribute((unused)) **vec,
318 int attribute((unused)) nvec) {
319 info("S%x shut down by %s", c->tag, c->who);
320 sink_writes(ev_writer_sink(c->w), "250 shutting down\n");
321 ev_writer_flush(c->w);
325 static int c_reconfigure(struct conn *c,
326 char attribute((unused)) **vec,
327 int attribute((unused)) nvec) {
328 info("S%x reconfigure by %s", c->tag, c->who);
329 if(reconfigure(c->ev, 1))
330 sink_writes(ev_writer_sink(c->w), "550 error reading new config\n");
332 sink_writes(ev_writer_sink(c->w), "250 installed new config\n");
333 return 1; /* completed */
336 static int c_rescan(struct conn *c,
337 char attribute((unused)) **vec,
338 int attribute((unused)) nvec) {
339 info("S%x rescan by %s", c->tag, c->who);
340 trackdb_rescan(c->ev);
341 sink_writes(ev_writer_sink(c->w), "250 initiated rescan\n");
342 return 1; /* completed */
345 static int c_version(struct conn *c,
346 char attribute((unused)) **vec,
347 int attribute((unused)) nvec) {
348 /* VERSION had better only use the basic character set */
349 sink_printf(ev_writer_sink(c->w), "251 %s\n", disorder_version_string);
350 return 1; /* completed */
353 static int c_playing(struct conn *c,
354 char attribute((unused)) **vec,
355 int attribute((unused)) nvec) {
357 queue_fix_sofar(playing);
358 playing->expected = 0;
359 sink_printf(ev_writer_sink(c->w), "252 %s\n", queue_marshall(playing));
361 sink_printf(ev_writer_sink(c->w), "259 nothing playing\n");
362 return 1; /* completed */
365 static int c_become(struct conn *c,
367 int attribute((unused)) nvec) {
369 sink_writes(ev_writer_sink(c->w), "230 OK\n");
373 static int c_user(struct conn *c,
375 int attribute((unused)) nvec) {
380 struct sockaddr_in in;
381 struct sockaddr_in6 in6;
387 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
390 /* get connection data */
392 if(getpeername(c->fd, &u.sa, &l) < 0) {
393 error(errno, "S%x error calling getpeername", c->tag);
394 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
397 if(c->l->pf != PF_UNIX) {
398 if((n = getnameinfo(&u.sa, l,
399 host, sizeof host, 0, 0, NI_NUMERICHOST))) {
400 error(0, "S%x error calling getnameinfo: %s", c->tag, gai_strerror(n));
401 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
405 strcpy(host, "local");
407 for(n = 0; n < config->allow.n
408 && strcmp(config->allow.s[n].s[0], vec[0]); ++n)
410 /* if it's a real user check whether the response is right */
411 if(n >= config->allow.n) {
412 info("S%x unknown user '%s' from %s", c->tag, vec[0], host);
413 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
416 res = authhash(c->nonce, sizeof c->nonce, config->allow.s[n].s[1],
417 config->authorization_algorithm);
418 if(wideopen || (res && !strcmp(res, vec[1]))) {
420 /* currently we only bother logging remote connections */
421 if(c->l->pf != PF_UNIX)
422 info("S%x %s connected from %s", c->tag, vec[0], host);
423 sink_writes(ev_writer_sink(c->w), "230 OK\n");
426 /* oops, response was wrong */
427 info("S%x authentication failure for %s from %s", c->tag, vec[0], host);
428 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
432 static int c_recent(struct conn *c,
433 char attribute((unused)) **vec,
434 int attribute((unused)) nvec) {
435 const struct queue_entry *q;
437 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
438 for(q = phead.next; q != &phead; q = q->next)
439 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
440 sink_writes(ev_writer_sink(c->w), ".\n");
441 return 1; /* completed */
444 static int c_queue(struct conn *c,
445 char attribute((unused)) **vec,
446 int attribute((unused)) nvec) {
447 struct queue_entry *q;
452 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
453 if(playing_is_enabled() && !paused) {
455 queue_fix_sofar(playing);
456 if((l = trackdb_get(playing->track, "_length"))
457 && (length = atol(l))) {
459 when += length - playing->sofar + config->gap;
462 /* Nothing is playing but playing is enabled, so whatever is
463 * first in the queue can be expected to start immediately. */
466 for(q = qhead.next; q != &qhead; q = q->next) {
467 /* fill in estimated start time */
469 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
470 /* update for next track */
472 if((l = trackdb_get(q->track, "_length"))
473 && (length = atol(l)))
474 when += length + config->gap;
479 sink_writes(ev_writer_sink(c->w), ".\n");
480 return 1; /* completed */
483 static int output_list(struct conn *c, char **vec) {
485 sink_printf(ev_writer_sink(c->w), "%s\n", *vec++);
486 sink_writes(ev_writer_sink(c->w), ".\n");
490 static int files_dirs(struct conn *c,
493 enum trackdb_listable what) {
494 const char *dir, *re, *errstr;
500 case 0: dir = 0; re = 0; break;
501 case 1: dir = vec[0]; re = 0; break;
502 case 2: dir = vec[0]; re = vec[1]; break;
505 /* A bit of a bodge to make sure the args don't trample on cache keys */
506 if(dir && strchr(dir, '\n')) {
507 sink_writes(ev_writer_sink(c->w), "550 invalid directory name\n");
510 if(re && strchr(re, '\n')) {
511 sink_writes(ev_writer_sink(c->w), "550 invalid regexp\n");
514 /* We bother eliminating "" because the web interface is relatively
515 * likely to send it */
517 byte_xasprintf(&key, "%d\n%s\n%s", (int)what, dir ? dir : "", re);
518 fvec = (char **)cache_get(&cache_files_type, key);
520 /* Got a cache hit, don't store the answer in the cache */
523 rec = 0; /* quieten compiler */
525 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
527 if(!(rec = pcre_compile(re, PCRE_CASELESS|PCRE_UTF8,
528 &errstr, &erroffset, 0))) {
529 sink_printf(ev_writer_sink(c->w), "550 Error compiling regexp: %s\n",
533 /* It only counts as a miss if the regexp was valid. */
534 ++cache_files_misses;
537 /* No regexp, don't bother caching the result */
543 /* No cache hit (either because a miss, or because we did not look) so do
546 fvec = trackdb_list(dir, 0, what, rec);
548 fvec = trackdb_list(0, 0, what, rec);
551 /* Put the answer in the cache */
552 cache_put(&cache_files_type, key, fvec);
553 sink_writes(ev_writer_sink(c->w), "253 Listing follow\n");
554 return output_list(c, fvec);
557 static int c_files(struct conn *c,
560 return files_dirs(c, vec, nvec, trackdb_files);
563 static int c_dirs(struct conn *c,
566 return files_dirs(c, vec, nvec, trackdb_directories);
569 static int c_allfiles(struct conn *c,
572 return files_dirs(c, vec, nvec, trackdb_directories|trackdb_files);
575 static int c_get(struct conn *c,
577 int attribute((unused)) nvec) {
580 if(vec[1][0] != '_' && (v = trackdb_get(vec[0], vec[1])))
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_length(struct conn *c,
589 int attribute((unused)) nvec) {
590 const char *track, *v;
592 if(!(track = trackdb_resolve(vec[0]))) {
593 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
596 if((v = trackdb_get(track, "_length")))
597 sink_printf(ev_writer_sink(c->w), "252 %s\n", v);
599 sink_writes(ev_writer_sink(c->w), "550 not found\n");
603 static int c_set(struct conn *c,
605 int attribute((unused)) nvec) {
606 if(vec[1][0] != '_' && !trackdb_set(vec[0], vec[1], vec[2]))
607 sink_writes(ev_writer_sink(c->w), "250 OK\n");
609 sink_writes(ev_writer_sink(c->w), "550 not found\n");
613 static int c_prefs(struct conn *c,
615 int attribute((unused)) nvec) {
618 k = trackdb_get_all(vec[0]);
619 sink_writes(ev_writer_sink(c->w), "253 prefs follow\n");
620 for(; k; k = k->next)
621 if(k->name[0] != '_') /* omit internal values */
622 sink_printf(ev_writer_sink(c->w),
623 " %s %s\n", quoteutf8(k->name), quoteutf8(k->value));
624 sink_writes(ev_writer_sink(c->w), ".\n");
628 static int c_exists(struct conn *c,
630 int attribute((unused)) nvec) {
631 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]);
635 static void search_parse_error(const char *msg, void *u) {
636 *(const char **)u = msg;
639 static int c_search(struct conn *c,
641 int attribute((unused)) nvec) {
642 char **terms, **results;
643 int nterms, nresults, n;
644 const char *e = "unknown error";
646 /* This is a bit of a bodge. Initially it's there to make the eclient
647 * interface a bit more convenient to add searching to, but it has the more
648 * compelling advantage that if everything uses it, then interpretation of
649 * user-supplied search strings will be the same everywhere. */
650 if(!(terms = split(vec[0], &nterms, SPLIT_QUOTES, search_parse_error, &e))) {
651 sink_printf(ev_writer_sink(c->w), "550 %s\n", e);
653 results = trackdb_search(terms, nterms, &nresults);
654 sink_printf(ev_writer_sink(c->w), "253 %d matches\n", nresults);
655 for(n = 0; n < nresults; ++n)
656 sink_printf(ev_writer_sink(c->w), "%s\n", results[n]);
657 sink_writes(ev_writer_sink(c->w), ".\n");
662 static int c_random_enable(struct conn *c,
663 char attribute((unused)) **vec,
664 int attribute((unused)) nvec) {
665 enable_random(c->who, c->ev);
666 /* Enable implicitly unpauses if there is nothing playing */
667 if(paused && !playing) resume_playing(c->who);
668 sink_writes(ev_writer_sink(c->w), "250 OK\n");
669 return 1; /* completed */
672 static int c_random_disable(struct conn *c,
673 char attribute((unused)) **vec,
674 int attribute((unused)) nvec) {
675 disable_random(c->who);
676 sink_writes(ev_writer_sink(c->w), "250 OK\n");
677 return 1; /* completed */
680 static int c_random_enabled(struct conn *c,
681 char attribute((unused)) **vec,
682 int attribute((unused)) nvec) {
683 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[random_is_enabled()]);
684 return 1; /* completed */
687 static void got_stats(char *stats, void *u) {
688 struct conn *const c = u;
690 sink_printf(ev_writer_sink(c->w), "253 stats\n%s\n.\n", stats);
691 /* Now we can start processing commands again */
692 ev_reader_enable(c->r);
695 static int c_stats(struct conn *c,
696 char attribute((unused)) **vec,
697 int attribute((unused)) nvec) {
698 trackdb_stats_subprocess(c->ev, got_stats, c);
699 return 0; /* not yet complete */
702 static int c_volume(struct conn *c,
713 l = r = atoi(vec[0]);
724 if(mixer_control(&l, &r, set))
725 sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n");
727 sink_printf(ev_writer_sink(c->w), "252 %d %d\n", l, r);
728 if(l != volume_left || r != volume_right) {
731 snprintf(lb, sizeof lb, "%d", l);
732 snprintf(rb, sizeof rb, "%d", r);
733 eventlog("volume", lb, rb, (char *)0);
739 /** @brief Called when data arrives on a log connection
741 * We just discard all such data. The client may occasionally send data as a
744 static int logging_reader_callback(ev_source attribute((unused)) *ev,
746 void attribute((unused)) *ptr,
748 int attribute((unused)) eof,
749 void attribute((unused)) *u) {
752 ev_reader_consume(reader, bytes);
754 /* Oops, that's all for now */
755 D(("logging reader eof"));
758 ev_writer_close(c->w);
766 static void logclient(const char *msg, void *user) {
767 struct conn *c = user;
770 /* This connection has gone up in smoke for some reason */
771 eventlog_remove(c->lo);
774 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" %s\n",
775 (uintmax_t)time(0), msg);
778 static int c_log(struct conn *c,
779 char attribute((unused)) **vec,
780 int attribute((unused)) nvec) {
783 sink_writes(ev_writer_sink(c->w), "254 OK\n");
784 /* pump out initial state */
786 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
788 playing_is_enabled() ? "enable_play" : "disable_play");
789 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
791 random_is_enabled() ? "enable_random" : "disable_random");
792 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
794 paused ? "pause" : "resume");
796 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state playing\n",
799 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" volume %d %d\n",
800 (uintmax_t)now, volume_left, volume_right);
801 c->lo = xmalloc(sizeof *c->lo);
802 c->lo->fn = logclient;
805 c->reader = logging_reader_callback;
809 static void post_move_cleanup(void) {
810 struct queue_entry *q;
812 /* If we have caused any random tracks to not be at the end then we make them
813 * no longer be random. */
814 for(q = qhead.next; q != &qhead; q = q->next)
815 if(q->state == playing_random && q->next != &qhead)
816 q->state = playing_unplayed;
817 /* That might mean we need to add a new random track. */
822 static int c_move(struct conn *c,
824 int attribute((unused)) nvec) {
825 struct queue_entry *q;
828 if(config->restrictions & RESTRICT_MOVE) {
830 sink_writes(ev_writer_sink(c->w),
831 "550 only trusted users can move tracks\n");
835 if(!(q = queue_find(vec[0]))) {
836 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
839 n = queue_move(q, atoi(vec[1]), c->who);
841 sink_printf(ev_writer_sink(c->w), "252 %d\n", n);
842 /* If we've moved to the head of the queue then prepare the track. */
848 static int c_moveafter(struct conn *c,
850 int attribute((unused)) nvec) {
851 struct queue_entry *q, **qs;
854 if(config->restrictions & RESTRICT_MOVE) {
856 sink_writes(ev_writer_sink(c->w),
857 "550 only trusted users can move tracks\n");
862 if(!(q = queue_find(vec[0]))) {
863 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
870 qs = xcalloc(nvec, sizeof *qs);
871 for(n = 0; n < nvec; ++n)
872 if(!(qs[n] = queue_find(vec[n]))) {
873 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
876 queue_moveafter(q, nvec, qs, c->who);
878 sink_printf(ev_writer_sink(c->w), "250 Moved tracks\n");
879 /* If we've moved to the head of the queue then prepare the track. */
885 static int c_part(struct conn *c,
887 int attribute((unused)) nvec) {
888 sink_printf(ev_writer_sink(c->w), "252 %s\n",
889 trackdb_getpart(vec[0], vec[1], vec[2]));
893 static int c_resolve(struct conn *c,
895 int attribute((unused)) nvec) {
898 if(!(track = trackdb_resolve(vec[0]))) {
899 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
902 sink_printf(ev_writer_sink(c->w), "252 %s\n", track);
906 static int c_tags(struct conn *c,
907 char attribute((unused)) **vec,
908 int attribute((unused)) nvec) {
909 char **tags = trackdb_alltags();
911 sink_printf(ev_writer_sink(c->w), "253 Tag list follows\n");
913 sink_printf(ev_writer_sink(c->w), "%s%s\n",
914 **tags == '.' ? "." : "", *tags);
917 sink_writes(ev_writer_sink(c->w), ".\n");
918 return 1; /* completed */
922 static int c_set_global(struct conn *c,
924 int attribute((unused)) nvec) {
925 if(vec[0][0] == '_') {
926 sink_writes(ev_writer_sink(c->w), "550 cannot set internal global preferences\n");
929 trackdb_set_global(vec[0], vec[1], c->who);
930 sink_printf(ev_writer_sink(c->w), "250 OK\n");
934 static int c_get_global(struct conn *c,
936 int attribute((unused)) nvec) {
937 const char *s = trackdb_get_global(vec[0]);
940 sink_printf(ev_writer_sink(c->w), "252 %s\n", s);
942 sink_writes(ev_writer_sink(c->w), "550 not found\n");
946 static int c_nop(struct conn *c,
947 char attribute((unused)) **vec,
948 int attribute((unused)) nvec) {
949 sink_printf(ev_writer_sink(c->w), "250 Quack\n");
953 static int c_new(struct conn *c,
956 char **tracks = trackdb_new(0, nvec > 0 ? atoi(vec[0]) : INT_MAX);
958 sink_printf(ev_writer_sink(c->w), "253 New track list follows\n");
960 sink_printf(ev_writer_sink(c->w), "%s%s\n",
961 **tracks == '.' ? "." : "", *tracks);
964 sink_writes(ev_writer_sink(c->w), ".\n");
965 return 1; /* completed */
969 static int c_rtp_address(struct conn *c,
970 char attribute((unused)) **vec,
971 int attribute((unused)) nvec) {
972 if(config->speaker_backend == BACKEND_NETWORK) {
973 sink_printf(ev_writer_sink(c->w), "252 %s %s\n",
974 quoteutf8(config->broadcast.s[0]),
975 quoteutf8(config->broadcast.s[1]));
977 sink_writes(ev_writer_sink(c->w), "550 No RTP\n");
981 #define C_AUTH 0001 /* must be authenticated */
982 #define C_TRUSTED 0002 /* must be trusted user */
984 static const struct command {
986 int minargs, maxargs;
987 int (*fn)(struct conn *, char **, int);
990 { "allfiles", 0, 2, c_allfiles, C_AUTH },
991 { "become", 1, 1, c_become, C_AUTH|C_TRUSTED },
992 { "dirs", 0, 2, c_dirs, C_AUTH },
993 { "disable", 0, 1, c_disable, C_AUTH },
994 { "enable", 0, 0, c_enable, C_AUTH },
995 { "enabled", 0, 0, c_enabled, C_AUTH },
996 { "exists", 1, 1, c_exists, C_AUTH },
997 { "files", 0, 2, c_files, C_AUTH },
998 { "get", 2, 2, c_get, C_AUTH },
999 { "get-global", 1, 1, c_get_global, C_AUTH },
1000 { "length", 1, 1, c_length, C_AUTH },
1001 { "log", 0, 0, c_log, C_AUTH },
1002 { "move", 2, 2, c_move, C_AUTH },
1003 { "moveafter", 1, INT_MAX, c_moveafter, C_AUTH },
1004 { "new", 0, 1, c_new, C_AUTH },
1005 { "nop", 0, 0, c_nop, C_AUTH },
1006 { "part", 3, 3, c_part, C_AUTH },
1007 { "pause", 0, 0, c_pause, C_AUTH },
1008 { "play", 1, 1, c_play, C_AUTH },
1009 { "playing", 0, 0, c_playing, C_AUTH },
1010 { "prefs", 1, 1, c_prefs, C_AUTH },
1011 { "queue", 0, 0, c_queue, C_AUTH },
1012 { "random-disable", 0, 0, c_random_disable, C_AUTH },
1013 { "random-enable", 0, 0, c_random_enable, C_AUTH },
1014 { "random-enabled", 0, 0, c_random_enabled, C_AUTH },
1015 { "recent", 0, 0, c_recent, C_AUTH },
1016 { "reconfigure", 0, 0, c_reconfigure, C_AUTH|C_TRUSTED },
1017 { "remove", 1, 1, c_remove, C_AUTH },
1018 { "rescan", 0, 0, c_rescan, C_AUTH|C_TRUSTED },
1019 { "resolve", 1, 1, c_resolve, C_AUTH },
1020 { "resume", 0, 0, c_resume, C_AUTH },
1021 { "rtp-address", 0, 0, c_rtp_address, C_AUTH },
1022 { "scratch", 0, 1, c_scratch, C_AUTH },
1023 { "search", 1, 1, c_search, C_AUTH },
1024 { "set", 3, 3, c_set, C_AUTH, },
1025 { "set-global", 2, 2, c_set_global, C_AUTH },
1026 { "shutdown", 0, 0, c_shutdown, C_AUTH|C_TRUSTED },
1027 { "stats", 0, 0, c_stats, C_AUTH },
1028 { "tags", 0, 0, c_tags, C_AUTH },
1029 { "unset", 2, 2, c_set, C_AUTH },
1030 { "unset-global", 1, 1, c_set_global, C_AUTH },
1031 { "user", 2, 2, c_user, 0 },
1032 { "version", 0, 0, c_version, C_AUTH },
1033 { "volume", 0, 2, c_volume, C_AUTH }
1036 static void command_error(const char *msg, void *u) {
1039 sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg);
1042 /* process a command. Return 1 if complete, 0 if incomplete. */
1043 static int command(struct conn *c, char *line) {
1047 D(("server command %s", line));
1048 /* We force everything into NFC as early as possible */
1049 if(!(line = utf8_compose_canon(line, strlen(line), 0))) {
1050 sink_writes(ev_writer_sink(c->w), "500 cannot normalize command\n");
1053 if(!(vec = split(line, &nvec, SPLIT_QUOTES, command_error, c))) {
1054 sink_writes(ev_writer_sink(c->w), "500 cannot parse command\n");
1058 sink_writes(ev_writer_sink(c->w), "500 do what?\n");
1061 if((n = TABLE_FIND(commands, struct command, name, vec[0])) < 0)
1062 sink_writes(ev_writer_sink(c->w), "500 unknown command\n");
1064 if((commands[n].flags & C_AUTH) && !c->who) {
1065 sink_writes(ev_writer_sink(c->w), "530 not authenticated\n");
1068 if((commands[n].flags & C_TRUSTED) && !trusted(c)) {
1069 sink_writes(ev_writer_sink(c->w), "530 insufficient privilege\n");
1074 if(nvec < commands[n].minargs) {
1075 sink_writes(ev_writer_sink(c->w), "500 missing argument(s)\n");
1078 if(nvec > commands[n].maxargs) {
1079 sink_writes(ev_writer_sink(c->w), "500 too many arguments\n");
1082 return commands[n].fn(c, vec, nvec);
1084 return 1; /* completed */
1087 /* redirect to the right reader callback for our current state */
1088 static int redirect_reader_callback(ev_source *ev,
1096 return c->reader(ev, reader, ptr, bytes, eof, u);
1099 /* the main command reader */
1100 static int reader_callback(ev_source attribute((unused)) *ev,
1110 D(("server reader_callback"));
1111 while((eol = memchr(ptr, '\n', bytes))) {
1113 ev_reader_consume(reader, eol - (char *)ptr);
1114 complete = command(c, ptr);
1115 bytes -= (eol - (char *)ptr);
1118 /* the command had better have set a new reader callback */
1120 /* there are further bytes to read, or we are at eof; arrange for the
1121 * command's reader callback to handle them */
1122 return ev_reader_incomplete(reader);
1123 /* nothing's going on right now */
1126 /* command completed, we can go around and handle the next one */
1130 error(0, "S%x unterminated line", c->tag);
1131 D(("normal reader close"));
1134 D(("close associated writer"));
1135 ev_writer_close(c->w);
1142 static int listen_callback(ev_source *ev,
1144 const struct sockaddr attribute((unused)) *remote,
1145 socklen_t attribute((unused)) rlen,
1147 const struct listener *l = u;
1148 struct conn *c = xmalloc(sizeof *c);
1149 static unsigned tags;
1151 D(("server listen_callback fd %d (%s)", fd, l->name));
1156 c->w = ev_writer_new(ev, fd, writer_error, c,
1158 c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c,
1162 c->reader = reader_callback;
1164 gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM);
1165 if(!strcmp(config->authorization_algorithm, "sha1")
1166 || !strcmp(config->authorization_algorithm, "SHA1")) {
1167 sink_printf(ev_writer_sink(c->w), "231 %s\n",
1168 hex(c->nonce, sizeof c->nonce));
1170 sink_printf(ev_writer_sink(c->w), "231 %s %s\n",
1171 config->authorization_algorithm,
1172 hex(c->nonce, sizeof c->nonce));
1177 int server_start(ev_source *ev, int pf,
1178 size_t socklen, const struct sockaddr *sa,
1181 struct listener *l = xmalloc(sizeof *l);
1182 static const int one = 1;
1184 D(("server_init socket %s", name));
1185 fd = xsocket(pf, SOCK_STREAM, 0);
1186 xsetsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
1187 if(bind(fd, sa, socklen) < 0) {
1188 error(errno, "error binding to %s", name);
1196 if(ev_listen(ev, fd, listen_callback, l, "server listener"))
1201 int server_stop(ev_source *ev, int fd) {
1203 return ev_listen_cancel(ev, fd);