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Merge from disorder.dev.
[disorder] / server / server.c
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460b9539 1/*
2 * This file is part of DisOrder.
53710d44 3 * Copyright (C) 2004-2009 Richard Kettlewell
460b9539 4 *
e7eb3a27 5 * This program is free software: you can redistribute it and/or modify
460b9539 6 * it under the terms of the GNU General Public License as published by
e7eb3a27 7 * the Free Software Foundation, either version 3 of the License, or
460b9539 8 * (at your option) any later version.
9 *
e7eb3a27
RK
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
460b9539 15 * You should have received a copy of the GNU General Public License
e7eb3a27 16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
460b9539 17 */
18
05b75f8d 19#include "disorder-server.h"
53710d44 20#include "basen.h"
460b9539 21
22#ifndef NONCE_SIZE
23# define NONCE_SIZE 16
24#endif
25
10114017 26#ifndef CONFIRM_SIZE
53710d44
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27/** @brief Size of nonce in confirmation string in 32-bit words
28 *
29 * 64 bits gives 11 digits (in base 62).
30 */
31# define CONFIRM_SIZE 2
10114017 32#endif
33
460b9539 34int volume_left, volume_right; /* last known volume */
35
18e6d6e6 36/** @brief Accept all well-formed login attempts
37 *
38 * Used in debugging.
39 */
40int wideopen;
41
460b9539 42struct listener {
43 const char *name;
44 int pf;
45};
46
f65f5aff
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47struct conn;
48
49/** @brief Signature for line reader callback
50 * @param c Connection
51 * @param line Line
52 * @return 0 if incomplete, 1 if complete
53 *
54 * @p line is 0-terminated and excludes the newline. It points into the
55 * input buffer so will become invalid shortly.
56 */
57typedef int line_reader_type(struct conn *c,
58 char *line);
59
60/** @brief Signature for with-body command callbacks
61 * @param c Connection
62 * @param body List of body lines
63 * @param nbody Number of body lines
64 * @param u As passed to fetch_body()
65 * @return 0 to suspend input, 1 if complete
66 *
67 * The body strings are allocated (so survive indefinitely) and don't include
68 * newlines.
69 */
70typedef int body_callback_type(struct conn *c,
71 char **body,
72 int nbody,
73 void *u);
74
397ef7bb 75/** @brief One client connection */
460b9539 76struct conn {
397ef7bb 77 /** @brief Read commands from here */
460b9539 78 ev_reader *r;
397ef7bb 79 /** @brief Send responses to here */
460b9539 80 ev_writer *w;
397ef7bb 81 /** @brief Underlying file descriptor */
460b9539 82 int fd;
397ef7bb 83 /** @brief Unique identifier for connection used in log messages */
460b9539 84 unsigned tag;
397ef7bb 85 /** @brief Login name or NULL */
460b9539 86 char *who;
397ef7bb 87 /** @brief Event loop */
460b9539 88 ev_source *ev;
397ef7bb 89 /** @brief Nonce chosen for this connection */
460b9539 90 unsigned char nonce[NONCE_SIZE];
397ef7bb
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91 /** @brief Current reader callback
92 *
93 * We change this depending on whether we're servicing the @b log command
94 */
460b9539 95 ev_reader_callback *reader;
397ef7bb 96 /** @brief Event log output sending to this connection */
460b9539 97 struct eventlog_output *lo;
397ef7bb 98 /** @brief Parent listener */
460b9539 99 const struct listener *l;
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100 /** @brief Login cookie or NULL */
101 char *cookie;
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102 /** @brief Connection rights */
103 rights_type rights;
0126692c 104 /** @brief Next connection */
105 struct conn *next;
dd9af5cb
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106 /** @brief True if pending rescan had 'wait' set */
107 int rescan_wait;
ddbf05c8
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108 /** @brief Playlist that this connection locks */
109 const char *locked_playlist;
110 /** @brief When that playlist was locked */
111 time_t locked_when;
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112 /** @brief Line reader function */
113 line_reader_type *line_reader;
114 /** @brief Called when command body has been read */
115 body_callback_type *body_callback;
116 /** @brief Passed to @c body_callback */
117 void *body_u;
118 /** @brief Accumulating body */
119 struct vector body[1];
460b9539 120};
121
0126692c 122/** @brief Linked list of connections */
123static struct conn *connections;
124
460b9539 125static int reader_callback(ev_source *ev,
126 ev_reader *reader,
460b9539 127 void *ptr,
128 size_t bytes,
129 int eof,
130 void *u);
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131static int c_playlist_set_body(struct conn *c,
132 char **body,
133 int nbody,
134 void *u);
135static int fetch_body(struct conn *c,
136 body_callback_type body_callback,
137 void *u);
138static int body_line(struct conn *c, char *line);
139static int command(struct conn *c, char *line);
460b9539 140
141static const char *noyes[] = { "no", "yes" };
142
0126692c 143/** @brief Remove a connection from the connection list */
144static void remove_connection(struct conn *c) {
145 struct conn **cc;
146
147 for(cc = &connections; *cc && *cc != c; cc = &(*cc)->next)
148 ;
149 if(*cc)
150 *cc = c->next;
151}
152
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153/** @brief Called when a connection's writer fails or is shut down
154 *
155 * If the connection still has a raeder that is cancelled.
156 */
460b9539 157static int writer_error(ev_source attribute((unused)) *ev,
460b9539 158 int errno_value,
159 void *u) {
160 struct conn *c = u;
161
8d8b8c1f 162 D(("server writer_error S%x %d", c->tag, errno_value));
460b9539 163 if(errno_value == 0) {
164 /* writer is done */
8d8b8c1f 165 D(("S%x writer completed", c->tag));
460b9539 166 } else {
167 if(errno_value != EPIPE)
168 error(errno_value, "S%x write error on socket", c->tag);
38b8221f 169 if(c->r) {
8d8b8c1f 170 D(("cancel reader"));
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171 ev_reader_cancel(c->r);
172 c->r = 0;
173 }
8d8b8c1f 174 D(("done cancel reader"));
460b9539 175 }
38b8221f 176 c->w = 0;
75d64210 177 ev_report(ev);
0126692c 178 remove_connection(c);
460b9539 179 return 0;
180}
181
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182/** @brief Called when a conncetion's reader fails or is shut down
183 *
184 * If connection still has a writer then it is closed.
185 */
460b9539 186static int reader_error(ev_source attribute((unused)) *ev,
460b9539 187 int errno_value,
188 void *u) {
189 struct conn *c = u;
190
8d8b8c1f 191 D(("server reader_error S%x %d", c->tag, errno_value));
1563f6f6 192 error(errno_value, "S%x read error on socket", c->tag);
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193 if(c->w)
194 ev_writer_close(c->w);
195 c->w = 0;
196 c->r = 0;
768d7355 197 ev_report(ev);
0126692c 198 remove_connection(c);
460b9539 199 return 0;
200}
201
460b9539 202static int c_disable(struct conn *c, char **vec, int nvec) {
203 if(nvec == 0)
204 disable_playing(c->who);
205 else if(nvec == 1 && !strcmp(vec[0], "now"))
206 disable_playing(c->who);
207 else {
208 sink_writes(ev_writer_sink(c->w), "550 invalid argument\n");
209 return 1; /* completed */
210 }
211 sink_writes(ev_writer_sink(c->w), "250 OK\n");
212 return 1; /* completed */
213}
214
215static int c_enable(struct conn *c,
216 char attribute((unused)) **vec,
217 int attribute((unused)) nvec) {
218 enable_playing(c->who, c->ev);
219 /* Enable implicitly unpauses if there is nothing playing */
220 if(paused && !playing) resume_playing(c->who);
221 sink_writes(ev_writer_sink(c->w), "250 OK\n");
222 return 1; /* completed */
223}
224
225static int c_enabled(struct conn *c,
226 char attribute((unused)) **vec,
227 int attribute((unused)) nvec) {
228 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[playing_is_enabled()]);
229 return 1; /* completed */
230}
231
232static int c_play(struct conn *c, char **vec,
233 int attribute((unused)) nvec) {
234 const char *track;
235 struct queue_entry *q;
236
237 if(!trackdb_exists(vec[0])) {
238 sink_writes(ev_writer_sink(c->w), "550 track is not in database\n");
239 return 1;
240 }
241 if(!(track = trackdb_resolve(vec[0]))) {
242 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
243 return 1;
244 }
2dc2f478 245 q = queue_add(track, c->who, WHERE_BEFORE_RANDOM, origin_picked);
460b9539 246 queue_write();
247 /* If we added the first track, and something is playing, then prepare the
248 * new track. If nothing is playing then we don't bother as it wouldn't gain
249 * anything. */
250 if(q == qhead.next && playing)
251 prepare(c->ev, q);
81e440ce 252 sink_printf(ev_writer_sink(c->w), "252 %s\n", q->id);
460b9539 253 /* If the queue was empty but we are for some reason paused then
254 * unpause. */
255 if(!playing) resume_playing(0);
256 play(c->ev);
257 return 1; /* completed */
258}
259
260static int c_remove(struct conn *c, char **vec,
261 int attribute((unused)) nvec) {
262 struct queue_entry *q;
263
264 if(!(q = queue_find(vec[0]))) {
265 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
266 return 1;
267 }
938d8157 268 if(!right_removable(c->rights, c->who, q)) {
834e7c4a 269 error(0, "%s attempted remove but lacks required rights", c->who);
eb5dc014 270 sink_writes(ev_writer_sink(c->w),
b4a80f69 271 "510 Not authorized to remove that track\n");
eb5dc014 272 return 1;
460b9539 273 }
274 queue_remove(q, c->who);
275 /* De-prepare the track. */
276 abandon(c->ev, q);
49a773eb
RK
277 /* See about adding a new random track */
278 add_random_track(c->ev);
460b9539 279 /* Prepare whatever the next head track is. */
280 if(qhead.next != &qhead)
281 prepare(c->ev, qhead.next);
282 queue_write();
283 sink_writes(ev_writer_sink(c->w), "250 removed\n");
284 return 1; /* completed */
285}
286
287static int c_scratch(struct conn *c,
288 char **vec,
289 int nvec) {
290 if(!playing) {
291 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
292 return 1; /* completed */
293 }
eb5dc014
RK
294 /* TODO there is a bug here: if we specify an ID but it's not the currently
295 * playing track then you will get 550 if you weren't authorized to scratch
296 * the currently playing track. */
938d8157 297 if(!right_scratchable(c->rights, c->who, playing)) {
834e7c4a 298 error(0, "%s attempted scratch but lacks required rights", c->who);
eb5dc014 299 sink_writes(ev_writer_sink(c->w),
b4a80f69 300 "510 Not authorized to scratch that track\n");
eb5dc014 301 return 1;
460b9539 302 }
303 scratch(c->who, nvec == 1 ? vec[0] : 0);
304 /* If you scratch an unpaused track then it is automatically unpaused */
305 resume_playing(0);
306 sink_writes(ev_writer_sink(c->w), "250 scratched\n");
307 return 1; /* completed */
308}
309
310static int c_pause(struct conn *c,
311 char attribute((unused)) **vec,
312 int attribute((unused)) nvec) {
313 if(!playing) {
314 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
315 return 1; /* completed */
316 }
317 if(paused) {
318 sink_writes(ev_writer_sink(c->w), "250 already paused\n");
319 return 1; /* completed */
320 }
321 if(pause_playing(c->who) < 0)
322 sink_writes(ev_writer_sink(c->w), "550 cannot pause this track\n");
323 else
324 sink_writes(ev_writer_sink(c->w), "250 paused\n");
325 return 1;
326}
327
328static int c_resume(struct conn *c,
329 char attribute((unused)) **vec,
330 int attribute((unused)) nvec) {
331 if(!paused) {
332 sink_writes(ev_writer_sink(c->w), "250 not paused\n");
333 return 1; /* completed */
334 }
335 resume_playing(c->who);
336 sink_writes(ev_writer_sink(c->w), "250 paused\n");
337 return 1;
338}
339
340static int c_shutdown(struct conn *c,
341 char attribute((unused)) **vec,
342 int attribute((unused)) nvec) {
343 info("S%x shut down by %s", c->tag, c->who);
344 sink_writes(ev_writer_sink(c->w), "250 shutting down\n");
345 ev_writer_flush(c->w);
346 quit(c->ev);
347}
348
349static int c_reconfigure(struct conn *c,
350 char attribute((unused)) **vec,
351 int attribute((unused)) nvec) {
352 info("S%x reconfigure by %s", c->tag, c->who);
353 if(reconfigure(c->ev, 1))
354 sink_writes(ev_writer_sink(c->w), "550 error reading new config\n");
355 else
356 sink_writes(ev_writer_sink(c->w), "250 installed new config\n");
357 return 1; /* completed */
358}
359
dd9af5cb
RK
360static void finished_rescan(void *ru) {
361 struct conn *const c = ru;
362
363 sink_writes(ev_writer_sink(c->w), "250 rescan completed\n");
364 /* Turn this connection back on */
365 ev_reader_enable(c->r);
366}
367
368static void start_fresh_rescan(void *ru) {
369 struct conn *const c = ru;
370
371 if(trackdb_rescan_underway()) {
372 /* Some other waiter beat us to it. However in this case we're happy to
373 * piggyback; the requirement is that a new rescan be started, not that it
374 * was _our_ rescan. */
375 if(c->rescan_wait) {
376 /* We block until the rescan completes */
377 trackdb_add_rescanned(finished_rescan, c);
378 } else {
379 /* We report that the new rescan has started */
380 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
381 /* Turn this connection back on */
382 ev_reader_enable(c->r);
383 }
384 } else {
385 /* We are the first connection to get a callback so we must start a
386 * rescan. */
387 if(c->rescan_wait) {
388 /* We want to block until the new rescan completes */
389 trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c);
390 } else {
391 /* We can report back immediately */
392 trackdb_rescan(c->ev, 1/*check*/, 0, 0);
393 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
394 /* Turn this connection back on */
395 ev_reader_enable(c->r);
396 }
397 }
398}
399
460b9539 400static int c_rescan(struct conn *c,
dd9af5cb
RK
401 char **vec,
402 int nvec) {
d867af10 403 int flag_wait = 0, flag_fresh = 0, n;
dd9af5cb
RK
404
405 /* Parse flags */
406 for(n = 0; n < nvec; ++n) {
407 if(!strcmp(vec[n], "wait"))
d867af10 408 flag_wait = 1; /* wait for rescan to complete */
dd9af5cb
RK
409#if 0
410 /* Currently disabled because untested (and hard to test). */
411 else if(!strcmp(vec[n], "fresh"))
d867af10 412 flag_fresh = 1; /* don't piggyback underway rescan */
dd9af5cb
RK
413#endif
414 else {
415 sink_writes(ev_writer_sink(c->w), "550 unknown flag\n");
416 return 1; /* completed */
417 }
418 }
419 /* Report what was requested */
420 info("S%x rescan by %s (%s %s)", c->tag, c->who,
d867af10
RK
421 flag_wait ? "wait" : "",
422 flag_fresh ? "fresh" : "");
dd9af5cb 423 if(trackdb_rescan_underway()) {
d867af10 424 if(flag_fresh) {
dd9af5cb
RK
425 /* We want a fresh rescan but there is already one underway. Arrange a
426 * callback when it completes and then set off a new one. */
d867af10 427 c->rescan_wait = flag_wait;
dd9af5cb 428 trackdb_add_rescanned(start_fresh_rescan, c);
d867af10 429 if(flag_wait)
dd9af5cb
RK
430 return 0;
431 else {
432 sink_writes(ev_writer_sink(c->w), "250 rescan queued\n");
433 return 1;
434 }
435 } else {
436 /* There's a rescan underway, and it's acceptable to piggyback on it */
d867af10 437 if(flag_wait) {
dd9af5cb
RK
438 /* We want to block until completion. */
439 trackdb_add_rescanned(finished_rescan, c);
440 return 0;
441 } else {
442 /* We don't want to block. So we just report that things are in
443 * hand. */
444 sink_writes(ev_writer_sink(c->w), "250 rescan already underway\n");
445 return 1;
446 }
447 }
448 } else {
449 /* No rescan is underway. fresh is therefore irrelevant. */
d867af10 450 if(flag_wait) {
dd9af5cb
RK
451 /* We want to block until completion */
452 trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c);
453 return 0;
454 } else {
455 /* We don't want to block. */
456 trackdb_rescan(c->ev, 1/*check*/, 0, 0);
457 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
458 return 1; /* completed */
459 }
460 }
460b9539 461}
462
463static int c_version(struct conn *c,
464 char attribute((unused)) **vec,
465 int attribute((unused)) nvec) {
466 /* VERSION had better only use the basic character set */
a05e4467 467 sink_printf(ev_writer_sink(c->w), "251 %s\n", disorder_short_version_string);
460b9539 468 return 1; /* completed */
469}
470
471static int c_playing(struct conn *c,
472 char attribute((unused)) **vec,
473 int attribute((unused)) nvec) {
474 if(playing) {
475 queue_fix_sofar(playing);
476 playing->expected = 0;
477 sink_printf(ev_writer_sink(c->w), "252 %s\n", queue_marshall(playing));
478 } else
479 sink_printf(ev_writer_sink(c->w), "259 nothing playing\n");
480 return 1; /* completed */
481}
482
b12be54a 483static const char *connection_host(struct conn *c) {
460b9539 484 union {
485 struct sockaddr sa;
486 struct sockaddr_in in;
487 struct sockaddr_in6 in6;
488 } u;
489 socklen_t l;
b12be54a 490 int n;
460b9539 491 char host[1024];
492
460b9539 493 /* get connection data */
494 l = sizeof u;
495 if(getpeername(c->fd, &u.sa, &l) < 0) {
496 error(errno, "S%x error calling getpeername", c->tag);
b12be54a 497 return 0;
460b9539 498 }
499 if(c->l->pf != PF_UNIX) {
500 if((n = getnameinfo(&u.sa, l,
501 host, sizeof host, 0, 0, NI_NUMERICHOST))) {
502 error(0, "S%x error calling getnameinfo: %s", c->tag, gai_strerror(n));
b12be54a 503 return 0;
460b9539 504 }
b12be54a 505 return xstrdup(host);
18e6d6e6 506 } else
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RK
507 return "local";
508}
509
510static int c_user(struct conn *c,
511 char **vec,
512 int attribute((unused)) nvec) {
eb5dc014 513 struct kvp *k;
f0feb22e 514 const char *res, *host, *password;
eb5dc014 515 rights_type rights;
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RK
516
517 if(c->who) {
518 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
519 return 1;
520 }
521 /* get connection data */
522 if(!(host = connection_host(c))) {
523 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
524 return 1;
525 }
460b9539 526 /* find the user */
eb5dc014 527 k = trackdb_getuserinfo(vec[0]);
f0feb22e 528 /* reject nonexistent users */
eb5dc014
RK
529 if(!k) {
530 error(0, "S%x unknown user '%s' from %s", c->tag, vec[0], host);
531 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
532 return 1;
533 }
534 /* reject unconfirmed users */
535 if(kvp_get(k, "confirmation")) {
536 error(0, "S%x unconfirmed user '%s' from %s", c->tag, vec[0], host);
537 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
538 return 1;
539 }
540 password = kvp_get(k, "password");
541 if(!password) password = "";
0f55e905 542 if(parse_rights(kvp_get(k, "rights"), &rights, 1)) {
eb5dc014 543 error(0, "error parsing rights for %s", vec[0]);
18e6d6e6 544 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
545 return 1;
546 }
f0feb22e
RK
547 /* check whether the response is right */
548 res = authhash(c->nonce, sizeof c->nonce, password,
637fdea3 549 config->authorization_algorithm);
18e6d6e6 550 if(wideopen || (res && !strcmp(res, vec[1]))) {
551 c->who = vec[0];
eb5dc014 552 c->rights = rights;
18e6d6e6 553 /* currently we only bother logging remote connections */
30365519 554 if(strcmp(host, "local"))
18e6d6e6 555 info("S%x %s connected from %s", c->tag, vec[0], host);
30365519 556 else
eb5dc014 557 c->rights |= RIGHT__LOCAL;
18e6d6e6 558 sink_writes(ev_writer_sink(c->w), "230 OK\n");
559 return 1;
460b9539 560 }
561 /* oops, response was wrong */
18e6d6e6 562 info("S%x authentication failure for %s from %s", c->tag, vec[0], host);
460b9539 563 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
564 return 1;
565}
566
567static int c_recent(struct conn *c,
568 char attribute((unused)) **vec,
569 int attribute((unused)) nvec) {
570 const struct queue_entry *q;
571
572 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
573 for(q = phead.next; q != &phead; q = q->next)
574 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
575 sink_writes(ev_writer_sink(c->w), ".\n");
576 return 1; /* completed */
577}
578
579static int c_queue(struct conn *c,
580 char attribute((unused)) **vec,
581 int attribute((unused)) nvec) {
582 struct queue_entry *q;
583 time_t when = 0;
584 const char *l;
585 long length;
586
587 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
588 if(playing_is_enabled() && !paused) {
589 if(playing) {
590 queue_fix_sofar(playing);
591 if((l = trackdb_get(playing->track, "_length"))
592 && (length = atol(l))) {
4265e5d3 593 xtime(&when);
460b9539 594 when += length - playing->sofar + config->gap;
595 }
596 } else
597 /* Nothing is playing but playing is enabled, so whatever is
598 * first in the queue can be expected to start immediately. */
4265e5d3 599 xtime(&when);
460b9539 600 }
601 for(q = qhead.next; q != &qhead; q = q->next) {
602 /* fill in estimated start time */
603 q->expected = when;
604 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
605 /* update for next track */
606 if(when) {
607 if((l = trackdb_get(q->track, "_length"))
608 && (length = atol(l)))
609 when += length + config->gap;
610 else
611 when = 0;
612 }
613 }
614 sink_writes(ev_writer_sink(c->w), ".\n");
615 return 1; /* completed */
616}
617
618static int output_list(struct conn *c, char **vec) {
619 while(*vec)
620 sink_printf(ev_writer_sink(c->w), "%s\n", *vec++);
621 sink_writes(ev_writer_sink(c->w), ".\n");
622 return 1;
623}
624
625static int files_dirs(struct conn *c,
626 char **vec,
627 int nvec,
628 enum trackdb_listable what) {
629 const char *dir, *re, *errstr;
630 int erroffset;
631 pcre *rec;
632 char **fvec, *key;
633
634 switch(nvec) {
635 case 0: dir = 0; re = 0; break;
636 case 1: dir = vec[0]; re = 0; break;
637 case 2: dir = vec[0]; re = vec[1]; break;
638 default: abort();
639 }
640 /* A bit of a bodge to make sure the args don't trample on cache keys */
641 if(dir && strchr(dir, '\n')) {
642 sink_writes(ev_writer_sink(c->w), "550 invalid directory name\n");
643 return 1;
644 }
645 if(re && strchr(re, '\n')) {
646 sink_writes(ev_writer_sink(c->w), "550 invalid regexp\n");
647 return 1;
648 }
649 /* We bother eliminating "" because the web interface is relatively
650 * likely to send it */
651 if(re && *re) {
652 byte_xasprintf(&key, "%d\n%s\n%s", (int)what, dir ? dir : "", re);
653 fvec = (char **)cache_get(&cache_files_type, key);
654 if(fvec) {
655 /* Got a cache hit, don't store the answer in the cache */
656 key = 0;
657 ++cache_files_hits;
658 rec = 0; /* quieten compiler */
659 } else {
660 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
661 * in the cache. */
662 if(!(rec = pcre_compile(re, PCRE_CASELESS|PCRE_UTF8,
663 &errstr, &erroffset, 0))) {
664 sink_printf(ev_writer_sink(c->w), "550 Error compiling regexp: %s\n",
665 errstr);
666 return 1;
667 }
668 /* It only counts as a miss if the regexp was valid. */
669 ++cache_files_misses;
670 }
671 } else {
672 /* No regexp, don't bother caching the result */
673 rec = 0;
674 key = 0;
675 fvec = 0;
676 }
677 if(!fvec) {
678 /* No cache hit (either because a miss, or because we did not look) so do
679 * the lookup */
680 if(dir && *dir)
681 fvec = trackdb_list(dir, 0, what, rec);
682 else
683 fvec = trackdb_list(0, 0, what, rec);
684 }
685 if(key)
686 /* Put the answer in the cache */
687 cache_put(&cache_files_type, key, fvec);
688 sink_writes(ev_writer_sink(c->w), "253 Listing follow\n");
689 return output_list(c, fvec);
690}
691
692static int c_files(struct conn *c,
693 char **vec,
694 int nvec) {
695 return files_dirs(c, vec, nvec, trackdb_files);
696}
697
698static int c_dirs(struct conn *c,
699 char **vec,
700 int nvec) {
701 return files_dirs(c, vec, nvec, trackdb_directories);
702}
703
704static int c_allfiles(struct conn *c,
705 char **vec,
706 int nvec) {
707 return files_dirs(c, vec, nvec, trackdb_directories|trackdb_files);
708}
709
710static int c_get(struct conn *c,
711 char **vec,
712 int attribute((unused)) nvec) {
27ed5a69 713 const char *v, *track;
460b9539 714
27ed5a69
RK
715 if(!(track = trackdb_resolve(vec[0]))) {
716 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
717 return 1;
718 }
719 if(vec[1][0] != '_' && (v = trackdb_get(track, vec[1])))
7b32e917 720 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v));
460b9539 721 else
fb1bc1f5 722 sink_writes(ev_writer_sink(c->w), "555 not found\n");
460b9539 723 return 1;
724}
725
726static int c_length(struct conn *c,
727 char **vec,
728 int attribute((unused)) nvec) {
729 const char *track, *v;
730
731 if(!(track = trackdb_resolve(vec[0]))) {
732 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
733 return 1;
734 }
735 if((v = trackdb_get(track, "_length")))
7b32e917 736 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v));
460b9539 737 else
738 sink_writes(ev_writer_sink(c->w), "550 not found\n");
739 return 1;
740}
741
742static int c_set(struct conn *c,
743 char **vec,
744 int attribute((unused)) nvec) {
27ed5a69
RK
745 const char *track;
746
747 if(!(track = trackdb_resolve(vec[0]))) {
748 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
749 return 1;
750 }
751 if(vec[1][0] != '_' && !trackdb_set(track, vec[1], vec[2]))
460b9539 752 sink_writes(ev_writer_sink(c->w), "250 OK\n");
753 else
754 sink_writes(ev_writer_sink(c->w), "550 not found\n");
755 return 1;
756}
757
758static int c_prefs(struct conn *c,
759 char **vec,
760 int attribute((unused)) nvec) {
761 struct kvp *k;
27ed5a69 762 const char *track;
460b9539 763
27ed5a69
RK
764 if(!(track = trackdb_resolve(vec[0]))) {
765 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
766 return 1;
767 }
768 k = trackdb_get_all(track);
460b9539 769 sink_writes(ev_writer_sink(c->w), "253 prefs follow\n");
770 for(; k; k = k->next)
771 if(k->name[0] != '_') /* omit internal values */
772 sink_printf(ev_writer_sink(c->w),
773 " %s %s\n", quoteutf8(k->name), quoteutf8(k->value));
774 sink_writes(ev_writer_sink(c->w), ".\n");
775 return 1;
776}
777
778static int c_exists(struct conn *c,
779 char **vec,
780 int attribute((unused)) nvec) {
27ed5a69 781 /* trackdb_exists() does its own alias checking */
460b9539 782 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]);
783 return 1;
784}
785
786static void search_parse_error(const char *msg, void *u) {
787 *(const char **)u = msg;
788}
789
790static int c_search(struct conn *c,
791 char **vec,
792 int attribute((unused)) nvec) {
793 char **terms, **results;
794 int nterms, nresults, n;
795 const char *e = "unknown error";
796
797 /* This is a bit of a bodge. Initially it's there to make the eclient
798 * interface a bit more convenient to add searching to, but it has the more
799 * compelling advantage that if everything uses it, then interpretation of
800 * user-supplied search strings will be the same everywhere. */
801 if(!(terms = split(vec[0], &nterms, SPLIT_QUOTES, search_parse_error, &e))) {
802 sink_printf(ev_writer_sink(c->w), "550 %s\n", e);
803 } else {
804 results = trackdb_search(terms, nterms, &nresults);
805 sink_printf(ev_writer_sink(c->w), "253 %d matches\n", nresults);
806 for(n = 0; n < nresults; ++n)
807 sink_printf(ev_writer_sink(c->w), "%s\n", results[n]);
808 sink_writes(ev_writer_sink(c->w), ".\n");
809 }
810 return 1;
811}
812
813static int c_random_enable(struct conn *c,
814 char attribute((unused)) **vec,
815 int attribute((unused)) nvec) {
816 enable_random(c->who, c->ev);
817 /* Enable implicitly unpauses if there is nothing playing */
818 if(paused && !playing) resume_playing(c->who);
819 sink_writes(ev_writer_sink(c->w), "250 OK\n");
820 return 1; /* completed */
821}
822
823static int c_random_disable(struct conn *c,
824 char attribute((unused)) **vec,
825 int attribute((unused)) nvec) {
826 disable_random(c->who);
827 sink_writes(ev_writer_sink(c->w), "250 OK\n");
828 return 1; /* completed */
829}
830
831static int c_random_enabled(struct conn *c,
832 char attribute((unused)) **vec,
833 int attribute((unused)) nvec) {
834 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[random_is_enabled()]);
835 return 1; /* completed */
836}
837
d6dde5a3
RK
838static void got_stats(char *stats, void *u) {
839 struct conn *const c = u;
840
841 sink_printf(ev_writer_sink(c->w), "253 stats\n%s\n.\n", stats);
842 /* Now we can start processing commands again */
843 ev_reader_enable(c->r);
844}
845
460b9539 846static int c_stats(struct conn *c,
847 char attribute((unused)) **vec,
848 int attribute((unused)) nvec) {
d6dde5a3
RK
849 trackdb_stats_subprocess(c->ev, got_stats, c);
850 return 0; /* not yet complete */
460b9539 851}
852
853static int c_volume(struct conn *c,
854 char **vec,
855 int nvec) {
856 int l, r, set;
857 char lb[32], rb[32];
eb5dc014 858 rights_type rights;
460b9539 859
860 switch(nvec) {
861 case 0:
862 set = 0;
863 break;
864 case 1:
865 l = r = atoi(vec[0]);
866 set = 1;
867 break;
868 case 2:
869 l = atoi(vec[0]);
870 r = atoi(vec[1]);
871 set = 1;
872 break;
873 default:
874 abort();
875 }
eb5dc014
RK
876 rights = set ? RIGHT_VOLUME : RIGHT_READ;
877 if(!(c->rights & rights)) {
834e7c4a 878 error(0, "%s attempted to set volume but lacks required rights", c->who);
b4a80f69 879 sink_writes(ev_writer_sink(c->w), "510 Prohibited\n");
eb5dc014
RK
880 return 1;
881 }
b50cfb8a 882 if(!api || !api->set_volume) {
460b9539 883 sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n");
b50cfb8a
RK
884 return 1;
885 }
e4d0463f 886 (set ? api->set_volume : api->get_volume)(&l, &r);
b50cfb8a
RK
887 sink_printf(ev_writer_sink(c->w), "252 %d %d\n", l, r);
888 if(l != volume_left || r != volume_right) {
889 volume_left = l;
890 volume_right = r;
891 snprintf(lb, sizeof lb, "%d", l);
892 snprintf(rb, sizeof rb, "%d", r);
893 eventlog("volume", lb, rb, (char *)0);
460b9539 894 }
895 return 1;
896}
897
397ef7bb
RK
898/** @brief Called when data arrives on a log connection
899 *
900 * We just discard all such data. The client may occasionally send data as a
901 * keepalive.
902 */
903static int logging_reader_callback(ev_source attribute((unused)) *ev,
460b9539 904 ev_reader *reader,
397ef7bb 905 void attribute((unused)) *ptr,
460b9539 906 size_t bytes,
397ef7bb
RK
907 int attribute((unused)) eof,
908 void attribute((unused)) *u) {
460b9539 909 struct conn *c = u;
910
397ef7bb
RK
911 ev_reader_consume(reader, bytes);
912 if(eof) {
913 /* Oops, that's all for now */
8d8b8c1f 914 D(("logging reader eof"));
397ef7bb 915 if(c->w) {
8d8b8c1f 916 D(("close writer"));
397ef7bb
RK
917 ev_writer_close(c->w);
918 c->w = 0;
919 }
920 c->r = 0;
0126692c 921 remove_connection(c);
f6033c46 922 }
397ef7bb 923 return 0;
460b9539 924}
925
926static void logclient(const char *msg, void *user) {
927 struct conn *c = user;
928
f6033c46
RK
929 if(!c->w || !c->r) {
930 /* This connection has gone up in smoke for some reason */
931 eventlog_remove(c->lo);
ad492e00 932 c->lo = 0;
f6033c46
RK
933 return;
934 }
75e7b7c3
RK
935 /* user_* messages are restricted */
936 if(!strncmp(msg, "user_", 5)) {
58d2aad2
RK
937 /* They are only sent to admin users */
938 if(!(c->rights & RIGHT_ADMIN))
939 return;
940 /* They are not sent over TCP connections unless remote user-management is
941 * enabled */
942 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL))
943 return;
944 }
460b9539 945 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" %s\n",
4265e5d3 946 (uintmax_t)xtime(0), msg);
460b9539 947}
948
949static int c_log(struct conn *c,
950 char attribute((unused)) **vec,
951 int attribute((unused)) nvec) {
952 time_t now;
953
954 sink_writes(ev_writer_sink(c->w), "254 OK\n");
955 /* pump out initial state */
4265e5d3 956 xtime(&now);
460b9539 957 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
958 (uintmax_t)now,
959 playing_is_enabled() ? "enable_play" : "disable_play");
960 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
961 (uintmax_t)now,
962 random_is_enabled() ? "enable_random" : "disable_random");
963 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
964 (uintmax_t)now,
965 paused ? "pause" : "resume");
5abe307a
RK
966 if(playing)
967 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state playing\n",
968 (uintmax_t)now);
df44d69b
RK
969 /* Initial volume */
970 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" volume %d %d\n",
971 (uintmax_t)now, volume_left, volume_right);
460b9539 972 c->lo = xmalloc(sizeof *c->lo);
973 c->lo->fn = logclient;
974 c->lo->user = c;
975 eventlog_add(c->lo);
976 c->reader = logging_reader_callback;
977 return 0;
978}
979
eb5dc014
RK
980/** @brief Test whether a move is allowed
981 * @param c Connection
982 * @param qs List of IDs on queue
983 * @param nqs Number of IDs
984 * @return 0 if move is prohibited, non-0 if it is allowed
985 */
986static int has_move_rights(struct conn *c, struct queue_entry **qs, int nqs) {
eb5dc014
RK
987 for(; nqs > 0; ++qs, --nqs) {
988 struct queue_entry *const q = *qs;
989
938d8157 990 if(!right_movable(c->rights, c->who, q))
991 return 0;
eb5dc014 992 }
938d8157 993 return 1;
eb5dc014
RK
994}
995
460b9539 996static int c_move(struct conn *c,
997 char **vec,
998 int attribute((unused)) nvec) {
999 struct queue_entry *q;
1000 int n;
1001
460b9539 1002 if(!(q = queue_find(vec[0]))) {
1003 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1004 return 1;
1005 }
eb5dc014 1006 if(!has_move_rights(c, &q, 1)) {
834e7c4a 1007 error(0, "%s attempted move but lacks required rights", c->who);
eb5dc014 1008 sink_writes(ev_writer_sink(c->w),
b4a80f69 1009 "510 Not authorized to move that track\n");
eb5dc014
RK
1010 return 1;
1011 }
460b9539 1012 n = queue_move(q, atoi(vec[1]), c->who);
460b9539 1013 sink_printf(ev_writer_sink(c->w), "252 %d\n", n);
1014 /* If we've moved to the head of the queue then prepare the track. */
1015 if(q == qhead.next)
1016 prepare(c->ev, q);
1017 return 1;
1018}
1019
1020static int c_moveafter(struct conn *c,
1021 char **vec,
1022 int attribute((unused)) nvec) {
1023 struct queue_entry *q, **qs;
1024 int n;
1025
460b9539 1026 if(vec[0][0]) {
1027 if(!(q = queue_find(vec[0]))) {
1028 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1029 return 1;
1030 }
1031 } else
1032 q = 0;
1033 ++vec;
1034 --nvec;
1035 qs = xcalloc(nvec, sizeof *qs);
1036 for(n = 0; n < nvec; ++n)
1037 if(!(qs[n] = queue_find(vec[n]))) {
1038 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1039 return 1;
1040 }
eb5dc014 1041 if(!has_move_rights(c, qs, nvec)) {
834e7c4a 1042 error(0, "%s attempted moveafter but lacks required rights", c->who);
eb5dc014 1043 sink_writes(ev_writer_sink(c->w),
b4a80f69 1044 "510 Not authorized to move those tracks\n");
eb5dc014
RK
1045 return 1;
1046 }
460b9539 1047 queue_moveafter(q, nvec, qs, c->who);
460b9539 1048 sink_printf(ev_writer_sink(c->w), "250 Moved tracks\n");
1049 /* If we've moved to the head of the queue then prepare the track. */
1050 if(q == qhead.next)
1051 prepare(c->ev, q);
1052 return 1;
1053}
1054
1055static int c_part(struct conn *c,
1056 char **vec,
1057 int attribute((unused)) nvec) {
27ed5a69
RK
1058 const char *track;
1059
1060 if(!(track = trackdb_resolve(vec[0]))) {
1061 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
1062 return 1;
1063 }
460b9539 1064 sink_printf(ev_writer_sink(c->w), "252 %s\n",
27ed5a69 1065 quoteutf8(trackdb_getpart(track, vec[1], vec[2])));
460b9539 1066 return 1;
1067}
1068
1069static int c_resolve(struct conn *c,
1070 char **vec,
1071 int attribute((unused)) nvec) {
1072 const char *track;
1073
1074 if(!(track = trackdb_resolve(vec[0]))) {
1075 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
1076 return 1;
1077 }
7b32e917 1078 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(track));
460b9539 1079 return 1;
1080}
1081
ddbf05c8
RK
1082static int list_response(struct conn *c,
1083 const char *reply,
1084 char **list) {
1085 sink_printf(ev_writer_sink(c->w), "253 %s\n", reply);
1086 while(*list) {
460b9539 1087 sink_printf(ev_writer_sink(c->w), "%s%s\n",
ddbf05c8
RK
1088 **list == '.' ? "." : "", *list);
1089 ++list;
460b9539 1090 }
1091 sink_writes(ev_writer_sink(c->w), ".\n");
1092 return 1; /* completed */
460b9539 1093}
1094
ddbf05c8
RK
1095static int c_tags(struct conn *c,
1096 char attribute((unused)) **vec,
1097 int attribute((unused)) nvec) {
1098 return list_response(c, "Tag list follows", trackdb_alltags());
1099}
1100
460b9539 1101static int c_set_global(struct conn *c,
1102 char **vec,
1103 int attribute((unused)) nvec) {
f9635e06
RK
1104 if(vec[0][0] == '_') {
1105 sink_writes(ev_writer_sink(c->w), "550 cannot set internal global preferences\n");
1106 return 1;
1107 }
460b9539 1108 trackdb_set_global(vec[0], vec[1], c->who);
1109 sink_printf(ev_writer_sink(c->w), "250 OK\n");
1110 return 1;
1111}
1112
1113static int c_get_global(struct conn *c,
1114 char **vec,
1115 int attribute((unused)) nvec) {
1116 const char *s = trackdb_get_global(vec[0]);
1117
1118 if(s)
7b32e917 1119 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(s));
460b9539 1120 else
fb1bc1f5 1121 sink_writes(ev_writer_sink(c->w), "555 not found\n");
460b9539 1122 return 1;
1123}
1124
7858930d 1125static int c_nop(struct conn *c,
1126 char attribute((unused)) **vec,
1127 int attribute((unused)) nvec) {
1128 sink_printf(ev_writer_sink(c->w), "250 Quack\n");
1129 return 1;
1130}
1131
2a10b70b
RK
1132static int c_new(struct conn *c,
1133 char **vec,
1134 int nvec) {
d742bb47
RK
1135 int max, n;
1136 char **tracks;
2a10b70b 1137
d742bb47
RK
1138 if(nvec > 0)
1139 max = atoi(vec[0]);
1140 else
1141 max = INT_MAX;
1142 if(max <= 0 || max > config->new_max)
1143 max = config->new_max;
1144 tracks = trackdb_new(0, max);
2a10b70b 1145 sink_printf(ev_writer_sink(c->w), "253 New track list follows\n");
d742bb47 1146 n = 0;
2a10b70b
RK
1147 while(*tracks) {
1148 sink_printf(ev_writer_sink(c->w), "%s%s\n",
1149 **tracks == '.' ? "." : "", *tracks);
1150 ++tracks;
1151 }
1152 sink_writes(ev_writer_sink(c->w), ".\n");
1153 return 1; /* completed */
1154
1155}
1156
ca831831
RK
1157static int c_rtp_address(struct conn *c,
1158 char attribute((unused)) **vec,
1159 int attribute((unused)) nvec) {
b50cfb8a 1160 if(api == &uaudio_rtp) {
76e72f65
RK
1161 char **addr;
1162
1163 netaddress_format(&config->broadcast, NULL, &addr);
ca831831 1164 sink_printf(ev_writer_sink(c->w), "252 %s %s\n",
76e72f65
RK
1165 quoteutf8(addr[1]),
1166 quoteutf8(addr[2]));
ca831831
RK
1167 } else
1168 sink_writes(ev_writer_sink(c->w), "550 No RTP\n");
1169 return 1;
1170}
b12be54a
RK
1171
1172static int c_cookie(struct conn *c,
1173 char **vec,
1174 int attribute((unused)) nvec) {
1175 const char *host;
1176 char *user;
eb5dc014 1177 rights_type rights;
b12be54a
RK
1178
1179 /* Can't log in twice on the same connection */
1180 if(c->who) {
1181 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
1182 return 1;
1183 }
1184 /* Get some kind of peer identifcation */
1185 if(!(host = connection_host(c))) {
1186 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
1187 return 1;
1188 }
1189 /* Check the cookie */
eb5dc014 1190 user = verify_cookie(vec[0], &rights);
b12be54a
RK
1191 if(!user) {
1192 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
1193 return 1;
1194 }
1195 /* Log in */
e48c28bb 1196 c->who = user;
b12be54a 1197 c->cookie = vec[0];
eb5dc014 1198 c->rights = rights;
30365519 1199 if(strcmp(host, "local"))
b12be54a 1200 info("S%x %s connected with cookie from %s", c->tag, user, host);
30365519 1201 else
eb5dc014 1202 c->rights |= RIGHT__LOCAL;
0227f67d
RK
1203 /* Response contains username so client knows who they are acting as */
1204 sink_printf(ev_writer_sink(c->w), "232 %s\n", quoteutf8(user));
b12be54a
RK
1205 return 1;
1206}
1207
1208static int c_make_cookie(struct conn *c,
1209 char attribute((unused)) **vec,
1210 int attribute((unused)) nvec) {
1211 const char *cookie = make_cookie(c->who);
1212
1213 if(cookie)
eb5dc014 1214 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(cookie));
b12be54a
RK
1215 else
1216 sink_writes(ev_writer_sink(c->w), "550 Cannot create cookie\n");
1217 return 1;
1218}
1219
1220static int c_revoke(struct conn *c,
1221 char attribute((unused)) **vec,
1222 int attribute((unused)) nvec) {
1223 if(c->cookie) {
1224 revoke_cookie(c->cookie);
1225 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1226 } else
1227 sink_writes(ev_writer_sink(c->w), "550 Did not log in with cookie\n");
1228 return 1;
1229}
1230
f0feb22e
RK
1231static int c_adduser(struct conn *c,
1232 char **vec,
0f55e905
RK
1233 int nvec) {
1234 const char *rights;
1235
810b8083 1236 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
39e7dcfb 1237 error(0, "S%x: remote adduser", c->tag);
810b8083
RK
1238 sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
1239 return 1;
1240 }
0f55e905
RK
1241 if(nvec > 2) {
1242 rights = vec[2];
1243 if(parse_rights(vec[2], 0, 1)) {
1244 sink_writes(ev_writer_sink(c->w), "550 Invalid rights list\n");
1245 return -1;
1246 }
1247 } else
1248 rights = config->default_rights;
1249 if(trackdb_adduser(vec[0], vec[1], rights,
ba39faf6 1250 0/*email*/, 0/*confirmation*/))
f0feb22e
RK
1251 sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
1252 else
1253 sink_writes(ev_writer_sink(c->w), "250 User created\n");
1254 return 1;
1255}
1256
1257static int c_deluser(struct conn *c,
1258 char **vec,
1259 int attribute((unused)) nvec) {
0126692c 1260 struct conn *d;
1261
810b8083 1262 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
39e7dcfb 1263 error(0, "S%x: remote deluser", c->tag);
810b8083
RK
1264 sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
1265 return 1;
1266 }
0126692c 1267 if(trackdb_deluser(vec[0])) {
ba39faf6 1268 sink_writes(ev_writer_sink(c->w), "550 Cannot delete user\n");
0126692c 1269 return 1;
1270 }
1271 /* Zap connections belonging to deleted user */
1272 for(d = connections; d; d = d->next)
1273 if(!strcmp(d->who, vec[0]))
1274 d->rights = 0;
1275 sink_writes(ev_writer_sink(c->w), "250 User deleted\n");
f0feb22e
RK
1276 return 1;
1277}
1278
1279static int c_edituser(struct conn *c,
5df73aeb 1280 char **vec,
f0feb22e 1281 int attribute((unused)) nvec) {
0126692c 1282 struct conn *d;
1283
810b8083 1284 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
39e7dcfb 1285 error(0, "S%x: remote edituser", c->tag);
810b8083
RK
1286 sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
1287 return 1;
1288 }
eb5dc014
RK
1289 /* RIGHT_ADMIN can do anything; otherwise you can only set your own email
1290 * address and password. */
1291 if((c->rights & RIGHT_ADMIN)
5df73aeb
RK
1292 || (!strcmp(c->who, vec[0])
1293 && (!strcmp(vec[1], "email")
1294 || !strcmp(vec[1], "password")))) {
0126692c 1295 if(trackdb_edituserinfo(vec[0], vec[1], vec[2])) {
5df73aeb 1296 sink_writes(ev_writer_sink(c->w), "550 Failed to change setting\n");
0126692c 1297 return 1;
1298 }
1299 if(!strcmp(vec[1], "password")) {
1300 /* Zap all connections for this user after a password change */
1301 for(d = connections; d; d = d->next)
1302 if(!strcmp(d->who, vec[0]))
1303 d->rights = 0;
1304 } else if(!strcmp(vec[1], "rights")) {
1305 /* Update rights for this user */
1306 rights_type r;
1307
ad492e00
RK
1308 if(!parse_rights(vec[2], &r, 1)) {
1309 const char *new_rights = rights_string(r);
1310 for(d = connections; d; d = d->next) {
1311 if(!strcmp(d->who, vec[0])) {
1312 /* Update rights */
0126692c 1313 d->rights = r;
ad492e00
RK
1314 /* Notify any log connections */
1315 if(d->lo)
1316 sink_printf(ev_writer_sink(d->w),
75e7b7c3 1317 "%"PRIxMAX" rights_changed %s\n",
4265e5d3 1318 (uintmax_t)xtime(0),
75e7b7c3 1319 quoteutf8(new_rights));
ad492e00
RK
1320 }
1321 }
1322 }
0126692c 1323 }
1324 sink_writes(ev_writer_sink(c->w), "250 OK\n");
834e7c4a 1325 } else {
1326 error(0, "%s attempted edituser but lacks required rights", c->who);
b4a80f69 1327 sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n");
834e7c4a 1328 }
f0feb22e
RK
1329 return 1;
1330}
1331
1332static int c_userinfo(struct conn *c,
1333 char attribute((unused)) **vec,
1334 int attribute((unused)) nvec) {
5df73aeb
RK
1335 struct kvp *k;
1336 const char *value;
eb5dc014 1337
39e7dcfb
RK
1338 /* We allow remote querying of rights so that clients can figure out what
1339 * they're allowed to do */
1340 if(!config->remote_userman
1341 && !(c->rights & RIGHT__LOCAL)
1342 && strcmp(vec[1], "rights")) {
1343 error(0, "S%x: remote userinfo %s %s", c->tag, vec[0], vec[1]);
810b8083
RK
1344 sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n");
1345 return 1;
1346 }
eb5dc014 1347 /* RIGHT_ADMIN allows anything; otherwise you can only get your own email
29f5fbd2 1348 * address and rights list. */
eb5dc014 1349 if((c->rights & RIGHT_ADMIN)
5df73aeb
RK
1350 || (!strcmp(c->who, vec[0])
1351 && (!strcmp(vec[1], "email")
1352 || !strcmp(vec[1], "rights")))) {
1353 if((k = trackdb_getuserinfo(vec[0])))
1354 if((value = kvp_get(k, vec[1])))
1355 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(value));
1356 else
1357 sink_writes(ev_writer_sink(c->w), "555 Not set\n");
1358 else
1359 sink_writes(ev_writer_sink(c->w), "550 No such user\n");
834e7c4a 1360 } else {
1361 error(0, "%s attempted userinfo but lacks required rights", c->who);
b4a80f69 1362 sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n");
834e7c4a 1363 }
f0feb22e
RK
1364 return 1;
1365}
1366
c3be4f19
RK
1367static int c_users(struct conn *c,
1368 char attribute((unused)) **vec,
1369 int attribute((unused)) nvec) {
ddbf05c8 1370 return list_response(c, "User list follows", trackdb_listusers());
c3be4f19
RK
1371}
1372
ba39faf6
RK
1373static int c_register(struct conn *c,
1374 char **vec,
1375 int attribute((unused)) nvec) {
53710d44
RK
1376 char *cs;
1377 uint32_t nonce[CONFIRM_SIZE];
1378 char nonce_str[(32 * CONFIRM_SIZE) / 5 + 1];
1379
1380 /* The confirmation string is username/base62(nonce). The confirmation
1381 * process will pick the username back out to identify them but the _whole_
1382 * string is used as the confirmation string. Base 62 means we used only
1383 * letters and digits, minimizing the chance of the URL being mispasted. */
1384 gcry_randomize(nonce, sizeof nonce, GCRY_STRONG_RANDOM);
1385 if(basen(nonce, CONFIRM_SIZE, nonce_str, sizeof nonce_str, 62)) {
1386 error(0, "buffer too small encoding confirmation string");
1387 sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
1388 }
1389 byte_xasprintf(&cs, "%s/%s", vec[0], nonce_str);
ba39faf6
RK
1390 if(trackdb_adduser(vec[0], vec[1], config->default_rights, vec[2], cs))
1391 sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
1392 else
1393 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(cs));
1394 return 1;
1395}
1396
1397static int c_confirm(struct conn *c,
1398 char **vec,
1399 int attribute((unused)) nvec) {
ba39faf6 1400 char *user, *sep;
30365519 1401 rights_type rights;
1402 const char *host;
ba39faf6 1403
30365519 1404 /* Get some kind of peer identifcation */
1405 if(!(host = connection_host(c))) {
1406 sink_writes(ev_writer_sink(c->w), "530 Authentication failure\n");
1407 return 1;
1408 }
53710d44
RK
1409 /* Picking the LAST / means we don't (here) rule out slashes in usernames. */
1410 if(!(sep = strrchr(vec[0], '/'))) {
ba39faf6
RK
1411 sink_writes(ev_writer_sink(c->w), "550 Malformed confirmation string\n");
1412 return 1;
1413 }
53710d44 1414 user = xstrndup(vec[0], sep - vec[0]);
30365519 1415 if(trackdb_confirm(user, vec[0], &rights))
ba39faf6 1416 sink_writes(ev_writer_sink(c->w), "550 Incorrect confirmation string\n");
30365519 1417 else {
1418 c->who = user;
1419 c->cookie = 0;
1420 c->rights = rights;
1421 if(strcmp(host, "local"))
1422 info("S%x %s confirmed from %s", c->tag, user, host);
1423 else
1424 c->rights |= RIGHT__LOCAL;
1425 /* Response contains username so client knows who they are acting as */
1426 sink_printf(ev_writer_sink(c->w), "232 %s\n", quoteutf8(user));
1427 }
ba39faf6
RK
1428 return 1;
1429}
6207d2f3 1430
1431static int sent_reminder(ev_source attribute((unused)) *ev,
1432 pid_t attribute((unused)) pid,
1433 int status,
1434 const struct rusage attribute((unused)) *rusage,
1435 void *u) {
1436 struct conn *const c = u;
1437
1438 /* Tell the client what went down */
1439 if(!status) {
1440 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1441 } else {
1442 error(0, "reminder subprocess %s", wstat(status));
1443 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1444 }
1445 /* Re-enable this connection */
1446 ev_reader_enable(c->r);
1447 return 0;
1448}
1449
1450static int c_reminder(struct conn *c,
1451 char **vec,
1452 int attribute((unused)) nvec) {
1453 struct kvp *k;
1454 const char *password, *email, *text, *encoding, *charset, *content_type;
1455 const time_t *last;
1456 time_t now;
1457 pid_t pid;
1458
1459 static hash *last_reminder;
1460
1461 if(!config->mail_sender) {
1462 error(0, "cannot send password reminders because mail_sender not set");
1463 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1464 return 1;
1465 }
1466 if(!(k = trackdb_getuserinfo(vec[0]))) {
1467 error(0, "reminder for user '%s' who does not exist", vec[0]);
1468 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1469 return 1;
1470 }
1471 if(!(email = kvp_get(k, "email"))
33e95f03 1472 || !email_valid(email)) {
6207d2f3 1473 error(0, "user '%s' has no valid email address", vec[0]);
1474 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1475 return 1;
1476 }
1477 if(!(password = kvp_get(k, "password"))
1478 || !*password) {
1479 error(0, "user '%s' has no password", vec[0]);
1480 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1481 return 1;
1482 }
1483 /* Rate-limit reminders. This hash is bounded in size by the number of
1484 * users. If this is actually a problem for anyone then we can periodically
1485 * clean it. */
1486 if(!last_reminder)
1487 last_reminder = hash_new(sizeof (time_t));
1488 last = hash_find(last_reminder, vec[0]);
4265e5d3 1489 xtime(&now);
6207d2f3 1490 if(last && now < *last + config->reminder_interval) {
1491 error(0, "sent a password reminder to '%s' too recently", vec[0]);
1492 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1493 return 1;
1494 }
1495 /* Send the reminder */
1496 /* TODO this should be templatized and to some extent merged with
1497 * the code in act_register() */
1498 byte_xasprintf((char **)&text,
1499"Someone requested that you be sent a reminder of your DisOrder password.\n"
1500"Your password is:\n"
1501"\n"
1502" %s\n", password);
1503 if(!(text = mime_encode_text(text, &charset, &encoding)))
1504 fatal(0, "cannot encode email");
1505 byte_xasprintf((char **)&content_type, "text/plain;charset=%s",
1506 quote822(charset, 0));
1507 pid = sendmail_subprocess("", config->mail_sender, email,
1508 "DisOrder password reminder",
1509 encoding, content_type, text);
1510 if(pid < 0) {
1511 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1512 return 1;
1513 }
1514 hash_add(last_reminder, vec[0], &now, HASH_INSERT_OR_REPLACE);
1515 info("sending a passsword reminder to user '%s'", vec[0]);
1516 /* We can only continue when the subprocess finishes */
1517 ev_child(c->ev, pid, 0, sent_reminder, c);
1518 return 0;
1519}
1520
2b33c4cf
RK
1521static int c_schedule_list(struct conn *c,
1522 char attribute((unused)) **vec,
1523 int attribute((unused)) nvec) {
1524 char **ids = schedule_list(0);
1525 sink_writes(ev_writer_sink(c->w), "253 ID list follows\n");
1526 while(*ids)
1527 sink_printf(ev_writer_sink(c->w), "%s\n", *ids++);
1528 sink_writes(ev_writer_sink(c->w), ".\n");
1529 return 1; /* completed */
1530}
1531
1532static int c_schedule_get(struct conn *c,
1533 char **vec,
1534 int attribute((unused)) nvec) {
1535 struct kvp *actiondata = schedule_get(vec[0]), *k;
1536
1537 if(!actiondata) {
1538 sink_writes(ev_writer_sink(c->w), "555 No such event\n");
1539 return 1; /* completed */
1540 }
1541 /* Scheduled events are public information. Anyone with RIGHT_READ can see
1542 * them. */
1543 sink_writes(ev_writer_sink(c->w), "253 Event information follows\n");
1544 for(k = actiondata; k; k = k->next)
1545 sink_printf(ev_writer_sink(c->w), " %s %s\n",
1546 quoteutf8(k->name), quoteutf8(k->value));
1547 sink_writes(ev_writer_sink(c->w), ".\n");
1548 return 1; /* completed */
1549}
1550
1551static int c_schedule_del(struct conn *c,
1552 char **vec,
1553 int attribute((unused)) nvec) {
1554 struct kvp *actiondata = schedule_get(vec[0]);
1555
1556 if(!actiondata) {
1557 sink_writes(ev_writer_sink(c->w), "555 No such event\n");
1558 return 1; /* completed */
1559 }
1560 /* If you have admin rights you can delete anything. If you don't then you
1561 * can only delete your own scheduled events. */
1562 if(!(c->rights & RIGHT_ADMIN)) {
1563 const char *who = kvp_get(actiondata, "who");
1564
1565 if(!who || !c->who || strcmp(who, c->who)) {
1566 sink_writes(ev_writer_sink(c->w), "551 Not authorized\n");
1567 return 1; /* completed */
1568 }
1569 }
1570 if(schedule_del(vec[0]))
1571 sink_writes(ev_writer_sink(c->w), "550 Could not delete scheduled event\n");
1572 else
1573 sink_writes(ev_writer_sink(c->w), "250 Deleted\n");
1574 return 1; /* completed */
1575}
1576
1577static int c_schedule_add(struct conn *c,
1578 char **vec,
1579 int nvec) {
1580 struct kvp *actiondata = 0;
067eeb5f 1581 const char *id;
2b33c4cf
RK
1582
1583 /* Standard fields */
1584 kvp_set(&actiondata, "who", c->who);
1585 kvp_set(&actiondata, "when", vec[0]);
1586 kvp_set(&actiondata, "priority", vec[1]);
1587 kvp_set(&actiondata, "action", vec[2]);
1588 /* Action-dependent fields */
1589 if(!strcmp(vec[2], "play")) {
1590 if(nvec != 4) {
1591 sink_writes(ev_writer_sink(c->w), "550 Wrong number of arguments\n");
1592 return 1;
1593 }
1594 if(!trackdb_exists(vec[3])) {
1595 sink_writes(ev_writer_sink(c->w), "550 Track is not in database\n");
1596 return 1;
1597 }
1598 kvp_set(&actiondata, "track", vec[3]);
1599 } else if(!strcmp(vec[2], "set-global")) {
1600 if(nvec < 4 || nvec > 5) {
1601 sink_writes(ev_writer_sink(c->w), "550 Wrong number of arguments\n");
1602 return 1;
1603 }
1604 kvp_set(&actiondata, "key", vec[3]);
1605 if(nvec > 4)
1606 kvp_set(&actiondata, "value", vec[4]);
1607 } else {
1608 sink_writes(ev_writer_sink(c->w), "550 Unknown action\n");
1609 return 1;
1610 }
1611 /* schedule_add() checks user rights */
1612 id = schedule_add(c->ev, actiondata);
1613 if(!id)
1614 sink_writes(ev_writer_sink(c->w), "550 Cannot add scheduled event\n");
1615 else
1616 sink_printf(ev_writer_sink(c->w), "252 %s\n", id);
1617 return 1;
1618}
1619
d42e98ca
RK
1620static int c_adopt(struct conn *c,
1621 char **vec,
1622 int attribute((unused)) nvec) {
1623 struct queue_entry *q;
1624
1625 if(!c->who) {
1626 sink_writes(ev_writer_sink(c->w), "550 no identity\n");
1627 return 1;
1628 }
1629 if(!(q = queue_find(vec[0]))) {
1630 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1631 return 1;
1632 }
1633 if(q->origin != origin_random) {
1634 sink_writes(ev_writer_sink(c->w), "550 not a random track\n");
1635 return 1;
1636 }
1637 q->origin = origin_adopted;
1638 q->submitter = xstrdup(c->who);
1639 eventlog("adopted", q->id, q->submitter, (char *)0);
1640 queue_write();
1641 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1642 return 1;
1643}
1644
ddbf05c8
RK
1645static int playlist_response(struct conn *c,
1646 int err) {
1647 switch(err) {
1648 case 0:
1649 assert(!"cannot cope with success");
1650 case EACCES:
1651 sink_writes(ev_writer_sink(c->w), "550 Access denied\n");
1652 break;
1653 case EINVAL:
1654 sink_writes(ev_writer_sink(c->w), "550 Invalid playlist name\n");
1655 break;
1656 case ENOENT:
1657 sink_writes(ev_writer_sink(c->w), "555 No such playlist\n");
1658 break;
1659 default:
1660 sink_writes(ev_writer_sink(c->w), "550 Error accessing playlist\n");
1661 break;
1662 }
1663 return 1;
1664}
1665
1666static int c_playlist_get(struct conn *c,
1667 char **vec,
1668 int attribute((unused)) nvec) {
1669 char **tracks;
1670 int err;
1671
1672 if(!(err = trackdb_playlist_get(vec[0], c->who, &tracks, 0, 0)))
1673 return list_response(c, "Playlist contents follows", tracks);
1674 else
1675 return playlist_response(c, err);
1676}
1677
1678static int c_playlist_set(struct conn *c,
1679 char **vec,
1680 int attribute((unused)) nvec) {
f65f5aff
RK
1681 return fetch_body(c, c_playlist_set_body, vec[0]);
1682}
1683
1684static int c_playlist_set_body(struct conn *c,
1685 char **body,
1686 int nbody,
1687 void *u) {
1688 const char *playlist = u;
1689 int err;
1690
440af55d
RK
1691 if(!c->locked_playlist
1692 || strcmp(playlist, c->locked_playlist)) {
1693 sink_writes(ev_writer_sink(c->w), "550 Playlist is not locked\n");
1694 return 1;
1695 }
f65f5aff
RK
1696 if(!(err = trackdb_playlist_set(playlist, c->who,
1697 body, nbody, 0))) {
1698 sink_printf(ev_writer_sink(c->w), "250 OK\n");
1699 return 1;
1700 } else
1701 return playlist_response(c, err);
ddbf05c8
RK
1702}
1703
1704static int c_playlist_get_share(struct conn *c,
1705 char **vec,
1706 int attribute((unused)) nvec) {
1707 char *share;
1708 int err;
1709
1710 if(!(err = trackdb_playlist_get(vec[0], c->who, 0, 0, &share))) {
f65f5aff 1711 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(share));
ddbf05c8
RK
1712 return 1;
1713 } else
1714 return playlist_response(c, err);
1715}
1716
1717static int c_playlist_set_share(struct conn *c,
1718 char **vec,
1719 int attribute((unused)) nvec) {
1720 int err;
1721
1722 if(!(err = trackdb_playlist_set(vec[0], c->who, 0, 0, vec[1]))) {
f65f5aff 1723 sink_printf(ev_writer_sink(c->w), "250 OK\n");
ddbf05c8
RK
1724 return 1;
1725 } else
1726 return playlist_response(c, err);
1727}
1728
1729static int c_playlists(struct conn *c,
1730 char attribute((unused)) **vec,
1731 int attribute((unused)) nvec) {
1732 char **p;
1733
1734 trackdb_playlist_list(c->who, &p, 0);
1735 return list_response(c, "List of playlists follows", p);
1736}
1737
1738static int c_playlist_delete(struct conn *c,
1739 char **vec,
1740 int attribute((unused)) nvec) {
1741 int err;
1742
1743 if(!(err = trackdb_playlist_delete(vec[0], c->who))) {
f65f5aff 1744 sink_writes(ev_writer_sink(c->w), "250 OK\n");
ddbf05c8
RK
1745 return 1;
1746 } else
1747 return playlist_response(c, err);
1748}
1749
1750static int c_playlist_lock(struct conn *c,
1751 char **vec,
1752 int attribute((unused)) nvec) {
1753 int err;
1754 struct conn *cc;
1755
1756 /* Check we're allowed to modify this playlist */
1757 if((err = trackdb_playlist_set(vec[0], c->who, 0, 0, 0)))
1758 return playlist_response(c, err);
1759 /* If we hold a lock don't allow a new one */
1760 if(c->locked_playlist) {
1761 sink_writes(ev_writer_sink(c->w), "550 Already holding a lock\n");
1762 return 1;
1763 }
1764 /* See if some other connection locks the same playlist */
1765 for(cc = connections; cc; cc = cc->next)
1766 if(cc->locked_playlist && !strcmp(cc->locked_playlist, vec[0]))
1767 break;
1768 if(cc) {
1769 /* TODO: implement config->playlist_lock_timeout */
1770 sink_writes(ev_writer_sink(c->w), "550 Already locked\n");
1771 return 1;
1772 }
1773 c->locked_playlist = xstrdup(vec[0]);
1774 time(&c->locked_when);
1775 sink_writes(ev_writer_sink(c->w), "250 Acquired lock\n");
1776 return 1;
1777}
1778
1779static int c_playlist_unlock(struct conn *c,
f65f5aff 1780 char attribute((unused)) **vec,
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1781 int attribute((unused)) nvec) {
1782 if(!c->locked_playlist) {
1783 sink_writes(ev_writer_sink(c->w), "550 Not holding a lock\n");
1784 return 1;
1785 }
1786 c->locked_playlist = 0;
1787 sink_writes(ev_writer_sink(c->w), "250 Released lock\n");
1788 return 1;
1789}
1790
460b9539 1791static const struct command {
eb5dc014 1792 /** @brief Command name */
460b9539 1793 const char *name;
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1794
1795 /** @brief Minimum number of arguments */
1796 int minargs;
1797
1798 /** @brief Maximum number of arguments */
1799 int maxargs;
1800
1801 /** @brief Function to process command */
460b9539 1802 int (*fn)(struct conn *, char **, int);
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1803
1804 /** @brief Rights required to execute command
1805 *
1806 * 0 means that the command can be issued without logging in. If multiple
1807 * bits are listed here any of those rights will do.
1808 */
1809 rights_type rights;
460b9539 1810} commands[] = {
0f55e905 1811 { "adduser", 2, 3, c_adduser, RIGHT_ADMIN|RIGHT__LOCAL },
d42e98ca 1812 { "adopt", 1, 1, c_adopt, RIGHT_PLAY },
eb5dc014 1813 { "allfiles", 0, 2, c_allfiles, RIGHT_READ },
ba39faf6 1814 { "confirm", 1, 1, c_confirm, 0 },
b12be54a 1815 { "cookie", 1, 1, c_cookie, 0 },
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1816 { "deluser", 1, 1, c_deluser, RIGHT_ADMIN|RIGHT__LOCAL },
1817 { "dirs", 0, 2, c_dirs, RIGHT_READ },
1818 { "disable", 0, 1, c_disable, RIGHT_GLOBAL_PREFS },
1819 { "edituser", 3, 3, c_edituser, RIGHT_ADMIN|RIGHT_USERINFO },
1820 { "enable", 0, 0, c_enable, RIGHT_GLOBAL_PREFS },
1821 { "enabled", 0, 0, c_enabled, RIGHT_READ },
1822 { "exists", 1, 1, c_exists, RIGHT_READ },
1823 { "files", 0, 2, c_files, RIGHT_READ },
1824 { "get", 2, 2, c_get, RIGHT_READ },
1825 { "get-global", 1, 1, c_get_global, RIGHT_READ },
1826 { "length", 1, 1, c_length, RIGHT_READ },
1827 { "log", 0, 0, c_log, RIGHT_READ },
1828 { "make-cookie", 0, 0, c_make_cookie, RIGHT_READ },
1829 { "move", 2, 2, c_move, RIGHT_MOVE__MASK },
1830 { "moveafter", 1, INT_MAX, c_moveafter, RIGHT_MOVE__MASK },
1831 { "new", 0, 1, c_new, RIGHT_READ },
1832 { "nop", 0, 0, c_nop, 0 },
1833 { "part", 3, 3, c_part, RIGHT_READ },
1834 { "pause", 0, 0, c_pause, RIGHT_PAUSE },
1835 { "play", 1, 1, c_play, RIGHT_PLAY },
1836 { "playing", 0, 0, c_playing, RIGHT_READ },
ddbf05c8 1837 { "playlist-delete", 1, 1, c_playlist_delete, RIGHT_PLAY },
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1838 { "playlist-get", 1, 1, c_playlist_get, RIGHT_READ },
1839 { "playlist-get-share", 1, 1, c_playlist_get_share, RIGHT_READ },
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1840 { "playlist-lock", 1, 1, c_playlist_lock, RIGHT_PLAY },
1841 { "playlist-set", 1, 1, c_playlist_set, RIGHT_PLAY },
1842 { "playlist-set-share", 2, 2, c_playlist_set_share, RIGHT_PLAY },
1843 { "playlist-unlock", 0, 0, c_playlist_unlock, RIGHT_PLAY },
fc80bbcd 1844 { "playlists", 0, 0, c_playlists, RIGHT_READ },
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1845 { "prefs", 1, 1, c_prefs, RIGHT_READ },
1846 { "queue", 0, 0, c_queue, RIGHT_READ },
1847 { "random-disable", 0, 0, c_random_disable, RIGHT_GLOBAL_PREFS },
1848 { "random-enable", 0, 0, c_random_enable, RIGHT_GLOBAL_PREFS },
1849 { "random-enabled", 0, 0, c_random_enabled, RIGHT_READ },
1850 { "recent", 0, 0, c_recent, RIGHT_READ },
1851 { "reconfigure", 0, 0, c_reconfigure, RIGHT_ADMIN },
ba39faf6 1852 { "register", 3, 3, c_register, RIGHT_REGISTER|RIGHT__LOCAL },
6207d2f3 1853 { "reminder", 1, 1, c_reminder, RIGHT__LOCAL },
eb5dc014 1854 { "remove", 1, 1, c_remove, RIGHT_REMOVE__MASK },
dd9af5cb 1855 { "rescan", 0, INT_MAX, c_rescan, RIGHT_RESCAN },
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1856 { "resolve", 1, 1, c_resolve, RIGHT_READ },
1857 { "resume", 0, 0, c_resume, RIGHT_PAUSE },
1858 { "revoke", 0, 0, c_revoke, RIGHT_READ },
1859 { "rtp-address", 0, 0, c_rtp_address, 0 },
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1860 { "schedule-add", 3, INT_MAX, c_schedule_add, RIGHT_READ },
1861 { "schedule-del", 1, 1, c_schedule_del, RIGHT_READ },
1862 { "schedule-get", 1, 1, c_schedule_get, RIGHT_READ },
1863 { "schedule-list", 0, 0, c_schedule_list, RIGHT_READ },
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1864 { "scratch", 0, 1, c_scratch, RIGHT_SCRATCH__MASK },
1865 { "search", 1, 1, c_search, RIGHT_READ },
1866 { "set", 3, 3, c_set, RIGHT_PREFS, },
1867 { "set-global", 2, 2, c_set_global, RIGHT_GLOBAL_PREFS },
1868 { "shutdown", 0, 0, c_shutdown, RIGHT_ADMIN },
1869 { "stats", 0, 0, c_stats, RIGHT_READ },
1870 { "tags", 0, 0, c_tags, RIGHT_READ },
1871 { "unset", 2, 2, c_set, RIGHT_PREFS },
1872 { "unset-global", 1, 1, c_set_global, RIGHT_GLOBAL_PREFS },
460b9539 1873 { "user", 2, 2, c_user, 0 },
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1874 { "userinfo", 2, 2, c_userinfo, RIGHT_READ },
1875 { "users", 0, 0, c_users, RIGHT_READ },
1876 { "version", 0, 0, c_version, RIGHT_READ },
1877 { "volume", 0, 2, c_volume, RIGHT_READ|RIGHT_VOLUME }
460b9539 1878};
1879
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1880/** @brief Fetch a command body
1881 * @param c Connection
1882 * @param body_callback Called with body
1883 * @param u Passed to body_callback
1884 * @return 1
1885 */
1886static int fetch_body(struct conn *c,
1887 body_callback_type body_callback,
1888 void *u) {
1889 assert(c->line_reader == command);
1890 c->line_reader = body_line;
1891 c->body_callback = body_callback;
1892 c->body_u = u;
1893 vector_init(c->body);
1894 return 1;
1895}
1896
1897/** @brief @ref line_reader_type callback for command body lines
1898 * @param c Connection
1899 * @param line Line
1900 * @return 1 if complete, 0 if incomplete
1901 *
1902 * Called from reader_callback().
1903 */
1904static int body_line(struct conn *c,
1905 char *line) {
1906 if(*line == '.') {
1907 ++line;
1908 if(!*line) {
1909 /* That's the lot */
1910 c->line_reader = command;
1911 vector_terminate(c->body);
1912 return c->body_callback(c, c->body->vec, c->body->nvec, c->body_u);
1913 }
1914 }
1915 vector_append(c->body, xstrdup(line));
1916 return 1; /* completed */
1917}
1918
460b9539 1919static void command_error(const char *msg, void *u) {
1920 struct conn *c = u;
1921
1922 sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg);
1923}
1924
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1925/** @brief @ref line_reader_type callback for commands
1926 * @param c Connection
1927 * @param line Line
1928 * @return 1 if complete, 0 if incomplete
1929 *
1930 * Called from reader_callback().
1931 */
460b9539 1932static int command(struct conn *c, char *line) {
1933 char **vec;
1934 int nvec, n;
1935
1936 D(("server command %s", line));
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1937 /* We force everything into NFC as early as possible */
1938 if(!(line = utf8_compose_canon(line, strlen(line), 0))) {
1939 sink_writes(ev_writer_sink(c->w), "500 cannot normalize command\n");
1940 return 1;
1941 }
460b9539 1942 if(!(vec = split(line, &nvec, SPLIT_QUOTES, command_error, c))) {
1943 sink_writes(ev_writer_sink(c->w), "500 cannot parse command\n");
1944 return 1;
1945 }
1946 if(nvec == 0) {
1947 sink_writes(ev_writer_sink(c->w), "500 do what?\n");
1948 return 1;
1949 }
ba937f01 1950 if((n = TABLE_FIND(commands, name, vec[0])) < 0)
460b9539 1951 sink_writes(ev_writer_sink(c->w), "500 unknown command\n");
1952 else {
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1953 if(commands[n].rights
1954 && !(c->rights & commands[n].rights)) {
834e7c4a 1955 error(0, "%s attempted %s but lacks required rights", c->who ? c->who : "NULL",
1956 commands[n].name);
b4a80f69 1957 sink_writes(ev_writer_sink(c->w), "510 Prohibited\n");
460b9539 1958 return 1;
1959 }
1960 ++vec;
1961 --nvec;
1962 if(nvec < commands[n].minargs) {
1963 sink_writes(ev_writer_sink(c->w), "500 missing argument(s)\n");
1964 return 1;
1965 }
1966 if(nvec > commands[n].maxargs) {
1967 sink_writes(ev_writer_sink(c->w), "500 too many arguments\n");
1968 return 1;
1969 }
1970 return commands[n].fn(c, vec, nvec);
1971 }
1972 return 1; /* completed */
1973}
1974
1975/* redirect to the right reader callback for our current state */
1976static int redirect_reader_callback(ev_source *ev,
1977 ev_reader *reader,
460b9539 1978 void *ptr,
1979 size_t bytes,
1980 int eof,
1981 void *u) {
1982 struct conn *c = u;
1983
75d64210 1984 return c->reader(ev, reader, ptr, bytes, eof, u);
460b9539 1985}
1986
1987/* the main command reader */
1988static int reader_callback(ev_source attribute((unused)) *ev,
1989 ev_reader *reader,
460b9539 1990 void *ptr,
1991 size_t bytes,
1992 int eof,
1993 void *u) {
1994 struct conn *c = u;
1995 char *eol;
1996 int complete;
1997
1998 D(("server reader_callback"));
1999 while((eol = memchr(ptr, '\n', bytes))) {
2000 *eol++ = 0;
2001 ev_reader_consume(reader, eol - (char *)ptr);
f65f5aff 2002 complete = c->line_reader(c, ptr); /* usually command() */
460b9539 2003 bytes -= (eol - (char *)ptr);
2004 ptr = eol;
2005 if(!complete) {
2006 /* the command had better have set a new reader callback */
2007 if(bytes || eof)
2008 /* there are further bytes to read, or we are at eof; arrange for the
2009 * command's reader callback to handle them */
2010 return ev_reader_incomplete(reader);
2011 /* nothing's going on right now */
2012 return 0;
2013 }
2014 /* command completed, we can go around and handle the next one */
2015 }
2016 if(eof) {
2017 if(bytes)
2018 error(0, "S%x unterminated line", c->tag);
8d8b8c1f 2019 D(("normal reader close"));
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2020 c->r = 0;
2021 if(c->w) {
8d8b8c1f 2022 D(("close associated writer"));
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2023 ev_writer_close(c->w);
2024 c->w = 0;
2025 }
0126692c 2026 remove_connection(c);
460b9539 2027 }
2028 return 0;
2029}
2030
2031static int listen_callback(ev_source *ev,
2032 int fd,
2033 const struct sockaddr attribute((unused)) *remote,
2034 socklen_t attribute((unused)) rlen,
2035 void *u) {
2036 const struct listener *l = u;
2037 struct conn *c = xmalloc(sizeof *c);
2038 static unsigned tags;
2039
2040 D(("server listen_callback fd %d (%s)", fd, l->name));
2041 nonblock(fd);
2042 cloexec(fd);
ad492e00 2043 c->next = connections;
460b9539 2044 c->tag = tags++;
2045 c->ev = ev;
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2046 c->w = ev_writer_new(ev, fd, writer_error, c,
2047 "client writer");
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2048 if(!c->w) {
2049 error(0, "ev_writer_new for file inbound connection (fd=%d) failed",
2050 fd);
2051 close(fd);
2052 return 0;
2053 }
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2054 c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c,
2055 "client reader");
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2056 if(!c->r)
2057 /* Main reason for failure is the FD is too big and that will already have
2058 * been handled */
2059 fatal(0, "ev_reader_new for file inbound connection (fd=%d) failed", fd);
75d64210 2060 ev_tie(c->r, c->w);
460b9539 2061 c->fd = fd;
2062 c->reader = reader_callback;
2063 c->l = l;
eb5dc014 2064 c->rights = 0;
f65f5aff 2065 c->line_reader = command;
ad492e00 2066 connections = c;
460b9539 2067 gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM);
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2068 sink_printf(ev_writer_sink(c->w), "231 %d %s %s\n",
2069 2,
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2070 config->authorization_algorithm,
2071 hex(c->nonce, sizeof c->nonce));
460b9539 2072 return 0;
2073}
2074
2075int server_start(ev_source *ev, int pf,
2076 size_t socklen, const struct sockaddr *sa,
2077 const char *name) {
2078 int fd;
2079 struct listener *l = xmalloc(sizeof *l);
2080 static const int one = 1;
2081
2082 D(("server_init socket %s", name));
2083 fd = xsocket(pf, SOCK_STREAM, 0);
2084 xsetsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
2085 if(bind(fd, sa, socklen) < 0) {
2086 error(errno, "error binding to %s", name);
2087 return -1;
2088 }
2089 xlisten(fd, 128);
2090 nonblock(fd);
2091 cloexec(fd);
2092 l->name = name;
2093 l->pf = pf;
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RK
2094 if(ev_listen(ev, fd, listen_callback, l, "server listener"))
2095 exit(EXIT_FAILURE);
80dc2c5f 2096 info("listening on %s", name);
460b9539 2097 return fd;
2098}
2099
2100int server_stop(ev_source *ev, int fd) {
2101 xclose(fd);
2102 return ev_listen_cancel(ev, fd);
2103}
2104
2105/*
2106Local Variables:
2107c-basic-offset:2
2108comment-column:40
2109fill-column:79
2110End:
2111*/