chiark / gitweb /
examples/disorder.init.in: Read settings from `/etc/default/disorder'.
[disorder] / server / server.c
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460b9539 1/*
2 * This file is part of DisOrder.
8a886602 3 * Copyright (C) 2004-2012 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
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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;
de37b640 45 int privileged;
460b9539 46};
47
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48struct conn;
49
50/** @brief Signature for line reader callback
51 * @param c Connection
52 * @param line Line
53 * @return 0 if incomplete, 1 if complete
54 *
55 * @p line is 0-terminated and excludes the newline. It points into the
56 * input buffer so will become invalid shortly.
57 */
58typedef int line_reader_type(struct conn *c,
59 char *line);
60
61/** @brief Signature for with-body command callbacks
62 * @param c Connection
63 * @param body List of body lines
64 * @param nbody Number of body lines
65 * @param u As passed to fetch_body()
66 * @return 0 to suspend input, 1 if complete
67 *
68 * The body strings are allocated (so survive indefinitely) and don't include
69 * newlines.
70 */
71typedef int body_callback_type(struct conn *c,
72 char **body,
73 int nbody,
74 void *u);
75
397ef7bb 76/** @brief One client connection */
460b9539 77struct conn {
397ef7bb 78 /** @brief Read commands from here */
460b9539 79 ev_reader *r;
397ef7bb 80 /** @brief Send responses to here */
460b9539 81 ev_writer *w;
397ef7bb 82 /** @brief Underlying file descriptor */
460b9539 83 int fd;
397ef7bb 84 /** @brief Unique identifier for connection used in log messages */
460b9539 85 unsigned tag;
397ef7bb 86 /** @brief Login name or NULL */
460b9539 87 char *who;
397ef7bb 88 /** @brief Event loop */
460b9539 89 ev_source *ev;
397ef7bb 90 /** @brief Nonce chosen for this connection */
460b9539 91 unsigned char nonce[NONCE_SIZE];
397ef7bb
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92 /** @brief Current reader callback
93 *
94 * We change this depending on whether we're servicing the @b log command
95 */
460b9539 96 ev_reader_callback *reader;
397ef7bb 97 /** @brief Event log output sending to this connection */
460b9539 98 struct eventlog_output *lo;
397ef7bb 99 /** @brief Parent listener */
460b9539 100 const struct listener *l;
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101 /** @brief Login cookie or NULL */
102 char *cookie;
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103 /** @brief Connection rights */
104 rights_type rights;
0126692c 105 /** @brief Next connection */
106 struct conn *next;
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107 /** @brief True if pending rescan had 'wait' set */
108 int rescan_wait;
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109 /** @brief Playlist that this connection locks */
110 const char *locked_playlist;
111 /** @brief When that playlist was locked */
112 time_t locked_when;
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113 /** @brief Line reader function */
114 line_reader_type *line_reader;
115 /** @brief Called when command body has been read */
116 body_callback_type *body_callback;
117 /** @brief Passed to @c body_callback */
118 void *body_u;
119 /** @brief Accumulating body */
120 struct vector body[1];
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121
122 /** @brief Nonzero if an active RTP request exists */
123 int rtp_requested;
124
125 /** @brief RTP destination (if @ref rtp_requested is nonzero) */
126 struct sockaddr_storage rtp_destination;
460b9539 127};
128
0126692c 129/** @brief Linked list of connections */
130static struct conn *connections;
131
460b9539 132static int reader_callback(ev_source *ev,
133 ev_reader *reader,
460b9539 134 void *ptr,
135 size_t bytes,
136 int eof,
137 void *u);
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138static int c_playlist_set_body(struct conn *c,
139 char **body,
140 int nbody,
141 void *u);
142static int fetch_body(struct conn *c,
143 body_callback_type body_callback,
144 void *u);
145static int body_line(struct conn *c, char *line);
146static int command(struct conn *c, char *line);
460b9539 147
148static const char *noyes[] = { "no", "yes" };
149
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150/** @brief Remove a connection from the connection list
151 *
152 * This is a good place for cleaning things up when connections are closed for
153 * any reason.
154 */
0126692c 155static void remove_connection(struct conn *c) {
156 struct conn **cc;
157
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158 if(c->rtp_requested) {
159 rtp_request_cancel(&c->rtp_destination);
160 c->rtp_requested = 0;
161 }
0126692c 162 for(cc = &connections; *cc && *cc != c; cc = &(*cc)->next)
163 ;
164 if(*cc)
165 *cc = c->next;
166}
167
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168/** @brief Called when a connection's writer fails or is shut down
169 *
170 * If the connection still has a raeder that is cancelled.
171 */
460b9539 172static int writer_error(ev_source attribute((unused)) *ev,
460b9539 173 int errno_value,
174 void *u) {
175 struct conn *c = u;
176
8d8b8c1f 177 D(("server writer_error S%x %d", c->tag, errno_value));
460b9539 178 if(errno_value == 0) {
179 /* writer is done */
8d8b8c1f 180 D(("S%x writer completed", c->tag));
460b9539 181 } else {
182 if(errno_value != EPIPE)
2e9ba080 183 disorder_error(errno_value, "S%x write error on socket", c->tag);
38b8221f 184 if(c->r) {
8d8b8c1f 185 D(("cancel reader"));
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186 ev_reader_cancel(c->r);
187 c->r = 0;
188 }
8d8b8c1f 189 D(("done cancel reader"));
460b9539 190 }
38b8221f 191 c->w = 0;
75d64210 192 ev_report(ev);
0126692c 193 remove_connection(c);
460b9539 194 return 0;
195}
196
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197/** @brief Called when a conncetion's reader fails or is shut down
198 *
199 * If connection still has a writer then it is closed.
200 */
460b9539 201static int reader_error(ev_source attribute((unused)) *ev,
460b9539 202 int errno_value,
203 void *u) {
204 struct conn *c = u;
205
8d8b8c1f 206 D(("server reader_error S%x %d", c->tag, errno_value));
2e9ba080 207 disorder_error(errno_value, "S%x read error on socket", c->tag);
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208 if(c->w)
209 ev_writer_close(c->w);
210 c->w = 0;
211 c->r = 0;
768d7355 212 ev_report(ev);
0126692c 213 remove_connection(c);
460b9539 214 return 0;
215}
216
460b9539 217static int c_disable(struct conn *c, char **vec, int nvec) {
218 if(nvec == 0)
9439cdab 219 disable_playing(c->who, c->ev);
460b9539 220 else if(nvec == 1 && !strcmp(vec[0], "now"))
9439cdab 221 disable_playing(c->who, c->ev);
460b9539 222 else {
223 sink_writes(ev_writer_sink(c->w), "550 invalid argument\n");
224 return 1; /* completed */
225 }
226 sink_writes(ev_writer_sink(c->w), "250 OK\n");
227 return 1; /* completed */
228}
229
230static int c_enable(struct conn *c,
231 char attribute((unused)) **vec,
232 int attribute((unused)) nvec) {
233 enable_playing(c->who, c->ev);
234 /* Enable implicitly unpauses if there is nothing playing */
235 if(paused && !playing) resume_playing(c->who);
236 sink_writes(ev_writer_sink(c->w), "250 OK\n");
237 return 1; /* completed */
238}
239
240static int c_enabled(struct conn *c,
241 char attribute((unused)) **vec,
242 int attribute((unused)) nvec) {
243 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[playing_is_enabled()]);
244 return 1; /* completed */
245}
246
247static int c_play(struct conn *c, char **vec,
248 int attribute((unused)) nvec) {
249 const char *track;
250 struct queue_entry *q;
251
252 if(!trackdb_exists(vec[0])) {
253 sink_writes(ev_writer_sink(c->w), "550 track is not in database\n");
254 return 1;
255 }
256 if(!(track = trackdb_resolve(vec[0]))) {
257 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
258 return 1;
259 }
7a853280 260 q = queue_add(track, c->who, WHERE_BEFORE_RANDOM, NULL, origin_picked);
460b9539 261 queue_write();
81e440ce 262 sink_printf(ev_writer_sink(c->w), "252 %s\n", q->id);
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263 /* We make sure the track at the head of the queue is prepared, just in case
264 * we added it. We could be more subtle but prepare() will ensure we don't
265 * prepare the same track twice so there's no point. */
266 if(qhead.next != &qhead)
267 prepare(c->ev, qhead.next);
460b9539 268 /* If the queue was empty but we are for some reason paused then
269 * unpause. */
270 if(!playing) resume_playing(0);
271 play(c->ev);
272 return 1; /* completed */
273}
274
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275static int c_playafter(struct conn *c, char **vec,
276 int attribute((unused)) nvec) {
277 const char *track;
278 struct queue_entry *q;
279 const char *afterme = vec[0];
280
281 for(int n = 1; n < nvec; ++n) {
282 if(!trackdb_exists(vec[n])) {
283 sink_writes(ev_writer_sink(c->w), "550 track is not in database\n");
284 return 1;
285 }
286 if(!(track = trackdb_resolve(vec[n]))) {
287 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
288 return 1;
289 }
290 q = queue_add(track, c->who, WHERE_AFTER, afterme, origin_picked);
291 if(!q) {
292 sink_printf(ev_writer_sink(c->w), "550 No such ID\n");
293 return 1;
294 }
2e9ba080 295 disorder_info("added %s as %s after %s", track, q->id, afterme);
7a853280
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296 afterme = q->id;
297 }
298 queue_write();
299 sink_printf(ev_writer_sink(c->w), "252 OK\n");
300 /* We make sure the track at the head of the queue is prepared, just in case
301 * we added it. We could be more subtle but prepare() will ensure we don't
302 * prepare the same track twice so there's no point. */
303 if(qhead.next != &qhead) {
304 prepare(c->ev, qhead.next);
2e9ba080 305 disorder_info("prepared %s", qhead.next->id);
7a853280
RK
306 }
307 /* If the queue was empty but we are for some reason paused then
308 * unpause. */
309 if(!playing)
310 resume_playing(0);
311 play(c->ev);
312 return 1; /* completed */
313}
314
460b9539 315static int c_remove(struct conn *c, char **vec,
316 int attribute((unused)) nvec) {
317 struct queue_entry *q;
318
319 if(!(q = queue_find(vec[0]))) {
320 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
321 return 1;
322 }
938d8157 323 if(!right_removable(c->rights, c->who, q)) {
2e9ba080 324 disorder_error(0, "%s attempted remove but lacks required rights", c->who);
eb5dc014 325 sink_writes(ev_writer_sink(c->w),
b4a80f69 326 "510 Not authorized to remove that track\n");
eb5dc014 327 return 1;
460b9539 328 }
329 queue_remove(q, c->who);
330 /* De-prepare the track. */
331 abandon(c->ev, q);
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332 /* See about adding a new random track */
333 add_random_track(c->ev);
460b9539 334 /* Prepare whatever the next head track is. */
335 if(qhead.next != &qhead)
336 prepare(c->ev, qhead.next);
337 queue_write();
338 sink_writes(ev_writer_sink(c->w), "250 removed\n");
339 return 1; /* completed */
340}
341
342static int c_scratch(struct conn *c,
343 char **vec,
344 int nvec) {
345 if(!playing) {
346 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
347 return 1; /* completed */
348 }
eb5dc014
RK
349 /* TODO there is a bug here: if we specify an ID but it's not the currently
350 * playing track then you will get 550 if you weren't authorized to scratch
351 * the currently playing track. */
938d8157 352 if(!right_scratchable(c->rights, c->who, playing)) {
2e9ba080 353 disorder_error(0, "%s attempted scratch but lacks required rights", c->who);
eb5dc014 354 sink_writes(ev_writer_sink(c->w),
b4a80f69 355 "510 Not authorized to scratch that track\n");
eb5dc014 356 return 1;
460b9539 357 }
358 scratch(c->who, nvec == 1 ? vec[0] : 0);
359 /* If you scratch an unpaused track then it is automatically unpaused */
360 resume_playing(0);
361 sink_writes(ev_writer_sink(c->w), "250 scratched\n");
362 return 1; /* completed */
363}
364
365static int c_pause(struct conn *c,
366 char attribute((unused)) **vec,
367 int attribute((unused)) nvec) {
368 if(!playing) {
369 sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n");
370 return 1; /* completed */
371 }
372 if(paused) {
373 sink_writes(ev_writer_sink(c->w), "250 already paused\n");
374 return 1; /* completed */
375 }
376 if(pause_playing(c->who) < 0)
377 sink_writes(ev_writer_sink(c->w), "550 cannot pause this track\n");
378 else
379 sink_writes(ev_writer_sink(c->w), "250 paused\n");
380 return 1;
381}
382
383static int c_resume(struct conn *c,
384 char attribute((unused)) **vec,
385 int attribute((unused)) nvec) {
386 if(!paused) {
387 sink_writes(ev_writer_sink(c->w), "250 not paused\n");
388 return 1; /* completed */
389 }
390 resume_playing(c->who);
391 sink_writes(ev_writer_sink(c->w), "250 paused\n");
392 return 1;
393}
394
395static int c_shutdown(struct conn *c,
396 char attribute((unused)) **vec,
397 int attribute((unused)) nvec) {
2e9ba080 398 disorder_info("S%x shut down by %s", c->tag, c->who);
460b9539 399 sink_writes(ev_writer_sink(c->w), "250 shutting down\n");
400 ev_writer_flush(c->w);
401 quit(c->ev);
402}
403
404static int c_reconfigure(struct conn *c,
405 char attribute((unused)) **vec,
406 int attribute((unused)) nvec) {
2e9ba080 407 disorder_info("S%x reconfigure by %s", c->tag, c->who);
460b9539 408 if(reconfigure(c->ev, 1))
409 sink_writes(ev_writer_sink(c->w), "550 error reading new config\n");
410 else
411 sink_writes(ev_writer_sink(c->w), "250 installed new config\n");
412 return 1; /* completed */
413}
414
dd9af5cb
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415static void finished_rescan(void *ru) {
416 struct conn *const c = ru;
417
418 sink_writes(ev_writer_sink(c->w), "250 rescan completed\n");
419 /* Turn this connection back on */
420 ev_reader_enable(c->r);
421}
422
423static void start_fresh_rescan(void *ru) {
424 struct conn *const c = ru;
425
426 if(trackdb_rescan_underway()) {
427 /* Some other waiter beat us to it. However in this case we're happy to
428 * piggyback; the requirement is that a new rescan be started, not that it
429 * was _our_ rescan. */
430 if(c->rescan_wait) {
431 /* We block until the rescan completes */
432 trackdb_add_rescanned(finished_rescan, c);
433 } else {
434 /* We report that the new rescan has started */
435 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
436 /* Turn this connection back on */
437 ev_reader_enable(c->r);
438 }
439 } else {
440 /* We are the first connection to get a callback so we must start a
441 * rescan. */
442 if(c->rescan_wait) {
443 /* We want to block until the new rescan completes */
444 trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c);
445 } else {
446 /* We can report back immediately */
447 trackdb_rescan(c->ev, 1/*check*/, 0, 0);
448 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
449 /* Turn this connection back on */
450 ev_reader_enable(c->r);
451 }
452 }
453}
454
460b9539 455static int c_rescan(struct conn *c,
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456 char **vec,
457 int nvec) {
d867af10 458 int flag_wait = 0, flag_fresh = 0, n;
dd9af5cb
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459
460 /* Parse flags */
461 for(n = 0; n < nvec; ++n) {
462 if(!strcmp(vec[n], "wait"))
d867af10 463 flag_wait = 1; /* wait for rescan to complete */
dd9af5cb
RK
464#if 0
465 /* Currently disabled because untested (and hard to test). */
466 else if(!strcmp(vec[n], "fresh"))
d867af10 467 flag_fresh = 1; /* don't piggyback underway rescan */
dd9af5cb
RK
468#endif
469 else {
470 sink_writes(ev_writer_sink(c->w), "550 unknown flag\n");
471 return 1; /* completed */
472 }
473 }
474 /* Report what was requested */
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475 disorder_info("S%x rescan by %s (%s %s)", c->tag, c->who,
476 flag_wait ? "wait" : "",
477 flag_fresh ? "fresh" : "");
dd9af5cb 478 if(trackdb_rescan_underway()) {
d867af10 479 if(flag_fresh) {
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480 /* We want a fresh rescan but there is already one underway. Arrange a
481 * callback when it completes and then set off a new one. */
d867af10 482 c->rescan_wait = flag_wait;
dd9af5cb 483 trackdb_add_rescanned(start_fresh_rescan, c);
d867af10 484 if(flag_wait)
dd9af5cb
RK
485 return 0;
486 else {
487 sink_writes(ev_writer_sink(c->w), "250 rescan queued\n");
488 return 1;
489 }
490 } else {
491 /* There's a rescan underway, and it's acceptable to piggyback on it */
d867af10 492 if(flag_wait) {
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493 /* We want to block until completion. */
494 trackdb_add_rescanned(finished_rescan, c);
495 return 0;
496 } else {
497 /* We don't want to block. So we just report that things are in
498 * hand. */
499 sink_writes(ev_writer_sink(c->w), "250 rescan already underway\n");
500 return 1;
501 }
502 }
503 } else {
504 /* No rescan is underway. fresh is therefore irrelevant. */
d867af10 505 if(flag_wait) {
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RK
506 /* We want to block until completion */
507 trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c);
508 return 0;
509 } else {
510 /* We don't want to block. */
511 trackdb_rescan(c->ev, 1/*check*/, 0, 0);
512 sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n");
513 return 1; /* completed */
514 }
515 }
460b9539 516}
517
518static int c_version(struct conn *c,
519 char attribute((unused)) **vec,
520 int attribute((unused)) nvec) {
521 /* VERSION had better only use the basic character set */
a05e4467 522 sink_printf(ev_writer_sink(c->w), "251 %s\n", disorder_short_version_string);
460b9539 523 return 1; /* completed */
524}
525
526static int c_playing(struct conn *c,
527 char attribute((unused)) **vec,
528 int attribute((unused)) nvec) {
529 if(playing) {
530 queue_fix_sofar(playing);
531 playing->expected = 0;
532 sink_printf(ev_writer_sink(c->w), "252 %s\n", queue_marshall(playing));
533 } else
534 sink_printf(ev_writer_sink(c->w), "259 nothing playing\n");
535 return 1; /* completed */
536}
537
b12be54a 538static const char *connection_host(struct conn *c) {
460b9539 539 union {
540 struct sockaddr sa;
541 struct sockaddr_in in;
542 struct sockaddr_in6 in6;
543 } u;
544 socklen_t l;
b12be54a 545 int n;
460b9539 546 char host[1024];
547
460b9539 548 /* get connection data */
549 l = sizeof u;
550 if(getpeername(c->fd, &u.sa, &l) < 0) {
2e9ba080 551 disorder_error(errno, "S%x error calling getpeername", c->tag);
b12be54a 552 return 0;
460b9539 553 }
554 if(c->l->pf != PF_UNIX) {
555 if((n = getnameinfo(&u.sa, l,
556 host, sizeof host, 0, 0, NI_NUMERICHOST))) {
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557 disorder_error(0, "S%x error calling getnameinfo: %s",
558 c->tag, gai_strerror(n));
b12be54a 559 return 0;
460b9539 560 }
b12be54a 561 return xstrdup(host);
18e6d6e6 562 } else
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563 return "local";
564}
565
566static int c_user(struct conn *c,
567 char **vec,
568 int attribute((unused)) nvec) {
eb5dc014 569 struct kvp *k;
f0feb22e 570 const char *res, *host, *password;
eb5dc014 571 rights_type rights;
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572
573 if(c->who) {
574 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
575 return 1;
576 }
577 /* get connection data */
578 if(!(host = connection_host(c))) {
579 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
580 return 1;
581 }
460b9539 582 /* find the user */
eb5dc014 583 k = trackdb_getuserinfo(vec[0]);
f0feb22e 584 /* reject nonexistent users */
eb5dc014 585 if(!k) {
2e9ba080 586 disorder_error(0, "S%x unknown user '%s' from %s", c->tag, vec[0], host);
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RK
587 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
588 return 1;
589 }
590 /* reject unconfirmed users */
591 if(kvp_get(k, "confirmation")) {
2e9ba080
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592 disorder_error(0, "S%x unconfirmed user '%s' from %s",
593 c->tag, vec[0], host);
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594 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
595 return 1;
596 }
597 password = kvp_get(k, "password");
598 if(!password) password = "";
0f55e905 599 if(parse_rights(kvp_get(k, "rights"), &rights, 1)) {
2e9ba080 600 disorder_error(0, "error parsing rights for %s", vec[0]);
18e6d6e6 601 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
602 return 1;
603 }
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RK
604 /* check whether the response is right */
605 res = authhash(c->nonce, sizeof c->nonce, password,
637fdea3 606 config->authorization_algorithm);
de37b640 607 if(wideopen || c->l->privileged || (res && !strcmp(res, vec[1]))) {
18e6d6e6 608 c->who = vec[0];
eb5dc014 609 c->rights = rights;
18e6d6e6 610 /* currently we only bother logging remote connections */
30365519 611 if(strcmp(host, "local"))
2e9ba080 612 disorder_info("S%x %s connected from %s", c->tag, vec[0], host);
30365519 613 else
eb5dc014 614 c->rights |= RIGHT__LOCAL;
18e6d6e6 615 sink_writes(ev_writer_sink(c->w), "230 OK\n");
616 return 1;
460b9539 617 }
618 /* oops, response was wrong */
2e9ba080
RK
619 disorder_info("S%x authentication failure for %s from %s",
620 c->tag, vec[0], host);
460b9539 621 sink_writes(ev_writer_sink(c->w), "530 authentication failed\n");
622 return 1;
623}
624
625static int c_recent(struct conn *c,
626 char attribute((unused)) **vec,
627 int attribute((unused)) nvec) {
628 const struct queue_entry *q;
629
630 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
631 for(q = phead.next; q != &phead; q = q->next)
632 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
633 sink_writes(ev_writer_sink(c->w), ".\n");
634 return 1; /* completed */
635}
636
637static int c_queue(struct conn *c,
638 char attribute((unused)) **vec,
639 int attribute((unused)) nvec) {
640 struct queue_entry *q;
641 time_t when = 0;
642 const char *l;
643 long length;
644
645 sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n");
646 if(playing_is_enabled() && !paused) {
647 if(playing) {
648 queue_fix_sofar(playing);
649 if((l = trackdb_get(playing->track, "_length"))
650 && (length = atol(l))) {
4265e5d3 651 xtime(&when);
657fdb79 652 when += length - playing->sofar;
460b9539 653 }
654 } else
655 /* Nothing is playing but playing is enabled, so whatever is
656 * first in the queue can be expected to start immediately. */
4265e5d3 657 xtime(&when);
460b9539 658 }
659 for(q = qhead.next; q != &qhead; q = q->next) {
660 /* fill in estimated start time */
661 q->expected = when;
662 sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q));
663 /* update for next track */
664 if(when) {
665 if((l = trackdb_get(q->track, "_length"))
666 && (length = atol(l)))
657fdb79 667 when += length;
460b9539 668 else
669 when = 0;
670 }
671 }
672 sink_writes(ev_writer_sink(c->w), ".\n");
673 return 1; /* completed */
674}
675
676static int output_list(struct conn *c, char **vec) {
677 while(*vec)
678 sink_printf(ev_writer_sink(c->w), "%s\n", *vec++);
679 sink_writes(ev_writer_sink(c->w), ".\n");
680 return 1;
681}
682
683static int files_dirs(struct conn *c,
684 char **vec,
685 int nvec,
686 enum trackdb_listable what) {
a2e9d147
MW
687 const char *dir, *re;
688 char errstr[RXCERR_LEN];
689 size_t erroffset;
690 regexp *rec;
460b9539 691 char **fvec, *key;
692
693 switch(nvec) {
694 case 0: dir = 0; re = 0; break;
695 case 1: dir = vec[0]; re = 0; break;
696 case 2: dir = vec[0]; re = vec[1]; break;
697 default: abort();
698 }
699 /* A bit of a bodge to make sure the args don't trample on cache keys */
700 if(dir && strchr(dir, '\n')) {
701 sink_writes(ev_writer_sink(c->w), "550 invalid directory name\n");
702 return 1;
703 }
704 if(re && strchr(re, '\n')) {
705 sink_writes(ev_writer_sink(c->w), "550 invalid regexp\n");
706 return 1;
707 }
708 /* We bother eliminating "" because the web interface is relatively
709 * likely to send it */
710 if(re && *re) {
711 byte_xasprintf(&key, "%d\n%s\n%s", (int)what, dir ? dir : "", re);
712 fvec = (char **)cache_get(&cache_files_type, key);
713 if(fvec) {
714 /* Got a cache hit, don't store the answer in the cache */
715 key = 0;
716 ++cache_files_hits;
717 rec = 0; /* quieten compiler */
718 } else {
719 /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer
720 * in the cache. */
a2e9d147
MW
721 if(!(rec = regexp_compile(re, RXF_CASELESS,
722 errstr, sizeof(errstr), &erroffset))) {
460b9539 723 sink_printf(ev_writer_sink(c->w), "550 Error compiling regexp: %s\n",
724 errstr);
725 return 1;
726 }
727 /* It only counts as a miss if the regexp was valid. */
728 ++cache_files_misses;
729 }
730 } else {
731 /* No regexp, don't bother caching the result */
732 rec = 0;
733 key = 0;
734 fvec = 0;
735 }
736 if(!fvec) {
737 /* No cache hit (either because a miss, or because we did not look) so do
738 * the lookup */
739 if(dir && *dir)
740 fvec = trackdb_list(dir, 0, what, rec);
741 else
742 fvec = trackdb_list(0, 0, what, rec);
743 }
744 if(key)
745 /* Put the answer in the cache */
746 cache_put(&cache_files_type, key, fvec);
747 sink_writes(ev_writer_sink(c->w), "253 Listing follow\n");
748 return output_list(c, fvec);
749}
750
751static int c_files(struct conn *c,
752 char **vec,
753 int nvec) {
754 return files_dirs(c, vec, nvec, trackdb_files);
755}
756
757static int c_dirs(struct conn *c,
758 char **vec,
759 int nvec) {
760 return files_dirs(c, vec, nvec, trackdb_directories);
761}
762
763static int c_allfiles(struct conn *c,
764 char **vec,
765 int nvec) {
766 return files_dirs(c, vec, nvec, trackdb_directories|trackdb_files);
767}
768
769static int c_get(struct conn *c,
770 char **vec,
771 int attribute((unused)) nvec) {
27ed5a69 772 const char *v, *track;
460b9539 773
27ed5a69
RK
774 if(!(track = trackdb_resolve(vec[0]))) {
775 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
776 return 1;
777 }
778 if(vec[1][0] != '_' && (v = trackdb_get(track, vec[1])))
7b32e917 779 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v));
460b9539 780 else
fb1bc1f5 781 sink_writes(ev_writer_sink(c->w), "555 not found\n");
460b9539 782 return 1;
783}
784
785static int c_length(struct conn *c,
786 char **vec,
787 int attribute((unused)) nvec) {
788 const char *track, *v;
789
790 if(!(track = trackdb_resolve(vec[0]))) {
791 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
792 return 1;
793 }
794 if((v = trackdb_get(track, "_length")))
7b32e917 795 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v));
460b9539 796 else
797 sink_writes(ev_writer_sink(c->w), "550 not found\n");
798 return 1;
799}
800
801static int c_set(struct conn *c,
802 char **vec,
803 int attribute((unused)) nvec) {
27ed5a69
RK
804 const char *track;
805
806 if(!(track = trackdb_resolve(vec[0]))) {
807 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
808 return 1;
809 }
810 if(vec[1][0] != '_' && !trackdb_set(track, vec[1], vec[2]))
460b9539 811 sink_writes(ev_writer_sink(c->w), "250 OK\n");
812 else
813 sink_writes(ev_writer_sink(c->w), "550 not found\n");
814 return 1;
815}
816
817static int c_prefs(struct conn *c,
818 char **vec,
819 int attribute((unused)) nvec) {
820 struct kvp *k;
27ed5a69 821 const char *track;
460b9539 822
27ed5a69
RK
823 if(!(track = trackdb_resolve(vec[0]))) {
824 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
825 return 1;
826 }
827 k = trackdb_get_all(track);
460b9539 828 sink_writes(ev_writer_sink(c->w), "253 prefs follow\n");
829 for(; k; k = k->next)
830 if(k->name[0] != '_') /* omit internal values */
831 sink_printf(ev_writer_sink(c->w),
832 " %s %s\n", quoteutf8(k->name), quoteutf8(k->value));
833 sink_writes(ev_writer_sink(c->w), ".\n");
834 return 1;
835}
836
837static int c_exists(struct conn *c,
838 char **vec,
839 int attribute((unused)) nvec) {
27ed5a69 840 /* trackdb_exists() does its own alias checking */
460b9539 841 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]);
842 return 1;
843}
844
845static void search_parse_error(const char *msg, void *u) {
846 *(const char **)u = msg;
847}
848
849static int c_search(struct conn *c,
850 char **vec,
851 int attribute((unused)) nvec) {
852 char **terms, **results;
853 int nterms, nresults, n;
854 const char *e = "unknown error";
855
856 /* This is a bit of a bodge. Initially it's there to make the eclient
857 * interface a bit more convenient to add searching to, but it has the more
858 * compelling advantage that if everything uses it, then interpretation of
859 * user-supplied search strings will be the same everywhere. */
860 if(!(terms = split(vec[0], &nterms, SPLIT_QUOTES, search_parse_error, &e))) {
861 sink_printf(ev_writer_sink(c->w), "550 %s\n", e);
862 } else {
863 results = trackdb_search(terms, nterms, &nresults);
864 sink_printf(ev_writer_sink(c->w), "253 %d matches\n", nresults);
865 for(n = 0; n < nresults; ++n)
866 sink_printf(ev_writer_sink(c->w), "%s\n", results[n]);
867 sink_writes(ev_writer_sink(c->w), ".\n");
868 }
869 return 1;
870}
871
872static int c_random_enable(struct conn *c,
873 char attribute((unused)) **vec,
874 int attribute((unused)) nvec) {
875 enable_random(c->who, c->ev);
876 /* Enable implicitly unpauses if there is nothing playing */
877 if(paused && !playing) resume_playing(c->who);
878 sink_writes(ev_writer_sink(c->w), "250 OK\n");
879 return 1; /* completed */
880}
881
882static int c_random_disable(struct conn *c,
883 char attribute((unused)) **vec,
884 int attribute((unused)) nvec) {
9439cdab 885 disable_random(c->who, c->ev);
460b9539 886 sink_writes(ev_writer_sink(c->w), "250 OK\n");
887 return 1; /* completed */
888}
889
890static int c_random_enabled(struct conn *c,
891 char attribute((unused)) **vec,
892 int attribute((unused)) nvec) {
893 sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[random_is_enabled()]);
894 return 1; /* completed */
895}
896
d6dde5a3
RK
897static void got_stats(char *stats, void *u) {
898 struct conn *const c = u;
899
900 sink_printf(ev_writer_sink(c->w), "253 stats\n%s\n.\n", stats);
901 /* Now we can start processing commands again */
902 ev_reader_enable(c->r);
903}
904
460b9539 905static int c_stats(struct conn *c,
906 char attribute((unused)) **vec,
907 int attribute((unused)) nvec) {
d6dde5a3
RK
908 trackdb_stats_subprocess(c->ev, got_stats, c);
909 return 0; /* not yet complete */
460b9539 910}
911
912static int c_volume(struct conn *c,
913 char **vec,
914 int nvec) {
915 int l, r, set;
916 char lb[32], rb[32];
eb5dc014 917 rights_type rights;
460b9539 918
919 switch(nvec) {
920 case 0:
921 set = 0;
922 break;
923 case 1:
924 l = r = atoi(vec[0]);
925 set = 1;
926 break;
927 case 2:
928 l = atoi(vec[0]);
929 r = atoi(vec[1]);
930 set = 1;
931 break;
932 default:
933 abort();
934 }
eb5dc014
RK
935 rights = set ? RIGHT_VOLUME : RIGHT_READ;
936 if(!(c->rights & rights)) {
2e9ba080
RK
937 disorder_error(0, "%s attempted to set volume but lacks required rights",
938 c->who);
b4a80f69 939 sink_writes(ev_writer_sink(c->w), "510 Prohibited\n");
eb5dc014
RK
940 return 1;
941 }
b50cfb8a 942 if(!api || !api->set_volume) {
460b9539 943 sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n");
b50cfb8a
RK
944 return 1;
945 }
e4d0463f 946 (set ? api->set_volume : api->get_volume)(&l, &r);
b50cfb8a
RK
947 sink_printf(ev_writer_sink(c->w), "252 %d %d\n", l, r);
948 if(l != volume_left || r != volume_right) {
949 volume_left = l;
950 volume_right = r;
951 snprintf(lb, sizeof lb, "%d", l);
952 snprintf(rb, sizeof rb, "%d", r);
953 eventlog("volume", lb, rb, (char *)0);
460b9539 954 }
955 return 1;
956}
957
397ef7bb
RK
958/** @brief Called when data arrives on a log connection
959 *
960 * We just discard all such data. The client may occasionally send data as a
961 * keepalive.
962 */
963static int logging_reader_callback(ev_source attribute((unused)) *ev,
460b9539 964 ev_reader *reader,
397ef7bb 965 void attribute((unused)) *ptr,
460b9539 966 size_t bytes,
397ef7bb
RK
967 int attribute((unused)) eof,
968 void attribute((unused)) *u) {
460b9539 969 struct conn *c = u;
970
397ef7bb
RK
971 ev_reader_consume(reader, bytes);
972 if(eof) {
973 /* Oops, that's all for now */
8d8b8c1f 974 D(("logging reader eof"));
397ef7bb 975 if(c->w) {
8d8b8c1f 976 D(("close writer"));
397ef7bb
RK
977 ev_writer_close(c->w);
978 c->w = 0;
979 }
980 c->r = 0;
0126692c 981 remove_connection(c);
f6033c46 982 }
397ef7bb 983 return 0;
460b9539 984}
985
986static void logclient(const char *msg, void *user) {
987 struct conn *c = user;
988
f6033c46
RK
989 if(!c->w || !c->r) {
990 /* This connection has gone up in smoke for some reason */
991 eventlog_remove(c->lo);
ad492e00 992 c->lo = 0;
f6033c46
RK
993 return;
994 }
75e7b7c3
RK
995 /* user_* messages are restricted */
996 if(!strncmp(msg, "user_", 5)) {
58d2aad2
RK
997 /* They are only sent to admin users */
998 if(!(c->rights & RIGHT_ADMIN))
999 return;
1000 /* They are not sent over TCP connections unless remote user-management is
1001 * enabled */
1002 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL))
1003 return;
1004 }
460b9539 1005 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" %s\n",
4265e5d3 1006 (uintmax_t)xtime(0), msg);
460b9539 1007}
1008
1009static int c_log(struct conn *c,
1010 char attribute((unused)) **vec,
1011 int attribute((unused)) nvec) {
1012 time_t now;
1013
1014 sink_writes(ev_writer_sink(c->w), "254 OK\n");
1015 /* pump out initial state */
4265e5d3 1016 xtime(&now);
460b9539 1017 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
1018 (uintmax_t)now,
1019 playing_is_enabled() ? "enable_play" : "disable_play");
1020 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
1021 (uintmax_t)now,
1022 random_is_enabled() ? "enable_random" : "disable_random");
1023 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n",
1024 (uintmax_t)now,
1025 paused ? "pause" : "resume");
5abe307a
RK
1026 if(playing)
1027 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state playing\n",
1028 (uintmax_t)now);
df44d69b
RK
1029 /* Initial volume */
1030 sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" volume %d %d\n",
1031 (uintmax_t)now, volume_left, volume_right);
460b9539 1032 c->lo = xmalloc(sizeof *c->lo);
1033 c->lo->fn = logclient;
1034 c->lo->user = c;
1035 eventlog_add(c->lo);
1036 c->reader = logging_reader_callback;
1037 return 0;
1038}
1039
eb5dc014
RK
1040/** @brief Test whether a move is allowed
1041 * @param c Connection
1042 * @param qs List of IDs on queue
1043 * @param nqs Number of IDs
1044 * @return 0 if move is prohibited, non-0 if it is allowed
1045 */
1046static int has_move_rights(struct conn *c, struct queue_entry **qs, int nqs) {
eb5dc014
RK
1047 for(; nqs > 0; ++qs, --nqs) {
1048 struct queue_entry *const q = *qs;
1049
938d8157 1050 if(!right_movable(c->rights, c->who, q))
1051 return 0;
eb5dc014 1052 }
938d8157 1053 return 1;
eb5dc014
RK
1054}
1055
460b9539 1056static int c_move(struct conn *c,
1057 char **vec,
1058 int attribute((unused)) nvec) {
1059 struct queue_entry *q;
1060 int n;
1061
460b9539 1062 if(!(q = queue_find(vec[0]))) {
1063 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1064 return 1;
1065 }
eb5dc014 1066 if(!has_move_rights(c, &q, 1)) {
2e9ba080 1067 disorder_error(0, "%s attempted move but lacks required rights", c->who);
eb5dc014 1068 sink_writes(ev_writer_sink(c->w),
b4a80f69 1069 "510 Not authorized to move that track\n");
eb5dc014
RK
1070 return 1;
1071 }
460b9539 1072 n = queue_move(q, atoi(vec[1]), c->who);
460b9539 1073 sink_printf(ev_writer_sink(c->w), "252 %d\n", n);
1074 /* If we've moved to the head of the queue then prepare the track. */
1075 if(q == qhead.next)
1076 prepare(c->ev, q);
1077 return 1;
1078}
1079
1080static int c_moveafter(struct conn *c,
1081 char **vec,
1082 int attribute((unused)) nvec) {
1083 struct queue_entry *q, **qs;
1084 int n;
1085
460b9539 1086 if(vec[0][0]) {
1087 if(!(q = queue_find(vec[0]))) {
1088 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1089 return 1;
1090 }
1091 } else
1092 q = 0;
1093 ++vec;
1094 --nvec;
1095 qs = xcalloc(nvec, sizeof *qs);
1096 for(n = 0; n < nvec; ++n)
1097 if(!(qs[n] = queue_find(vec[n]))) {
1098 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1099 return 1;
1100 }
eb5dc014 1101 if(!has_move_rights(c, qs, nvec)) {
2e9ba080
RK
1102 disorder_error(0, "%s attempted moveafter but lacks required rights",
1103 c->who);
eb5dc014 1104 sink_writes(ev_writer_sink(c->w),
b4a80f69 1105 "510 Not authorized to move those tracks\n");
eb5dc014
RK
1106 return 1;
1107 }
460b9539 1108 queue_moveafter(q, nvec, qs, c->who);
460b9539 1109 sink_printf(ev_writer_sink(c->w), "250 Moved tracks\n");
1110 /* If we've moved to the head of the queue then prepare the track. */
1111 if(q == qhead.next)
1112 prepare(c->ev, q);
1113 return 1;
1114}
1115
1116static int c_part(struct conn *c,
1117 char **vec,
1118 int attribute((unused)) nvec) {
27ed5a69
RK
1119 const char *track;
1120
1121 if(!(track = trackdb_resolve(vec[0]))) {
1122 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
1123 return 1;
1124 }
460b9539 1125 sink_printf(ev_writer_sink(c->w), "252 %s\n",
27ed5a69 1126 quoteutf8(trackdb_getpart(track, vec[1], vec[2])));
460b9539 1127 return 1;
1128}
1129
1130static int c_resolve(struct conn *c,
1131 char **vec,
1132 int attribute((unused)) nvec) {
1133 const char *track;
1134
1135 if(!(track = trackdb_resolve(vec[0]))) {
1136 sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n");
1137 return 1;
1138 }
7b32e917 1139 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(track));
460b9539 1140 return 1;
1141}
1142
ddbf05c8
RK
1143static int list_response(struct conn *c,
1144 const char *reply,
1145 char **list) {
1146 sink_printf(ev_writer_sink(c->w), "253 %s\n", reply);
1147 while(*list) {
460b9539 1148 sink_printf(ev_writer_sink(c->w), "%s%s\n",
ddbf05c8
RK
1149 **list == '.' ? "." : "", *list);
1150 ++list;
460b9539 1151 }
1152 sink_writes(ev_writer_sink(c->w), ".\n");
1153 return 1; /* completed */
460b9539 1154}
1155
ddbf05c8
RK
1156static int c_tags(struct conn *c,
1157 char attribute((unused)) **vec,
1158 int attribute((unused)) nvec) {
1159 return list_response(c, "Tag list follows", trackdb_alltags());
1160}
1161
460b9539 1162static int c_set_global(struct conn *c,
1163 char **vec,
1164 int attribute((unused)) nvec) {
f9635e06
RK
1165 if(vec[0][0] == '_') {
1166 sink_writes(ev_writer_sink(c->w), "550 cannot set internal global preferences\n");
1167 return 1;
1168 }
9439cdab
RK
1169 /* We special-case the 'magic' preferences here. */
1170 if(!strcmp(vec[0], "playing")) {
1171 (flag_enabled(vec[1]) ? enable_playing : disable_playing)(c->who, c->ev);
43386708 1172 sink_printf(ev_writer_sink(c->w), "250 OK\n");
9439cdab
RK
1173 } else if(!strcmp(vec[0], "random-play")) {
1174 (flag_enabled(vec[1]) ? enable_random : disable_random)(c->who, c->ev);
43386708 1175 sink_printf(ev_writer_sink(c->w), "250 OK\n");
9439cdab 1176 } else {
2fbc0bd2 1177 if(!trackdb_set_global(vec[0], vec[1], c->who))
9439cdab
RK
1178 sink_printf(ev_writer_sink(c->w), "250 OK\n");
1179 else
1180 sink_writes(ev_writer_sink(c->w), "550 not found\n");
1181 }
460b9539 1182 return 1;
1183}
1184
1185static int c_get_global(struct conn *c,
1186 char **vec,
1187 int attribute((unused)) nvec) {
1188 const char *s = trackdb_get_global(vec[0]);
1189
1190 if(s)
7b32e917 1191 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(s));
460b9539 1192 else
fb1bc1f5 1193 sink_writes(ev_writer_sink(c->w), "555 not found\n");
460b9539 1194 return 1;
1195}
1196
7858930d 1197static int c_nop(struct conn *c,
1198 char attribute((unused)) **vec,
1199 int attribute((unused)) nvec) {
1200 sink_printf(ev_writer_sink(c->w), "250 Quack\n");
1201 return 1;
1202}
1203
2a10b70b
RK
1204static int c_new(struct conn *c,
1205 char **vec,
1206 int nvec) {
375d9478 1207 int max;
d742bb47 1208 char **tracks;
2a10b70b 1209
d742bb47
RK
1210 if(nvec > 0)
1211 max = atoi(vec[0]);
1212 else
1213 max = INT_MAX;
1214 if(max <= 0 || max > config->new_max)
1215 max = config->new_max;
1216 tracks = trackdb_new(0, max);
2a10b70b
RK
1217 sink_printf(ev_writer_sink(c->w), "253 New track list follows\n");
1218 while(*tracks) {
1219 sink_printf(ev_writer_sink(c->w), "%s%s\n",
1220 **tracks == '.' ? "." : "", *tracks);
1221 ++tracks;
1222 }
1223 sink_writes(ev_writer_sink(c->w), ".\n");
1224 return 1; /* completed */
1225
1226}
1227
ca831831
RK
1228static int c_rtp_address(struct conn *c,
1229 char attribute((unused)) **vec,
1230 int attribute((unused)) nvec) {
b50cfb8a 1231 if(api == &uaudio_rtp) {
76e72f65
RK
1232 char **addr;
1233
b0116b5c
RK
1234 if(!strcmp(config->rtp_mode, "request"))
1235 sink_printf(ev_writer_sink(c->w), "252 - -\n");
1236 else {
1237 netaddress_format(&config->broadcast, NULL, &addr);
1238 sink_printf(ev_writer_sink(c->w), "252 %s %s\n",
1239 quoteutf8(addr[1]),
1240 quoteutf8(addr[2]));
1241 }
ca831831
RK
1242 } else
1243 sink_writes(ev_writer_sink(c->w), "550 No RTP\n");
1244 return 1;
1245}
b12be54a 1246
b0116b5c
RK
1247static int c_rtp_cancel(struct conn *c,
1248 char attribute((unused)) **vec,
1249 int attribute((unused)) nvec) {
1250 if(!c->rtp_requested) {
1251 sink_writes(ev_writer_sink(c->w), "550 No active RTP stream\n");
1252 return 1;
1253 }
1254 rtp_request_cancel(&c->rtp_destination);
1255 c->rtp_requested = 0;
1256 sink_writes(ev_writer_sink(c->w), "250 Cancelled RTP stream\n");
1257 return 1;
1258}
1259
1260static int c_rtp_request(struct conn *c,
1261 char **vec,
1262 int attribute((unused)) nvec) {
1263 static const struct addrinfo hints = {
1264 .ai_family = AF_UNSPEC,
1265 .ai_socktype = SOCK_DGRAM,
1266 .ai_protocol = IPPROTO_UDP,
1267 .ai_flags = AI_NUMERICHOST|AI_NUMERICSERV,
1268 };
1269 struct addrinfo *res;
1270 int rc = getaddrinfo(vec[0], vec[1], &hints, &res);
1271 if(rc) {
1272 disorder_error(0, "%s port %s: %s",
1273 vec[0], vec[1], gai_strerror(rc));
1274 sink_writes(ev_writer_sink(c->w), "550 Invalid address\n");
1275 return 1;
1276 }
1277 disorder_info("%s requested RTP stream to %s %s", c->who, vec[0], vec[1]);
1278 /* TODO might be useful to tighten this up to restrict clients to targetting
1279 * themselves only */
1280 if(c->rtp_requested) {
1281 rtp_request_cancel(&c->rtp_destination);
1282 c->rtp_requested = 0;
1283 }
1284 memcpy(&c->rtp_destination, res->ai_addr, res->ai_addrlen);
1285 freeaddrinfo(res);
1286 rtp_request(&c->rtp_destination);
1287 c->rtp_requested = 1;
1288 sink_writes(ev_writer_sink(c->w), "250 Initiated RTP stream\n");
1289 // TODO teardown on connection close
1290 return 1;
1291}
1292
b12be54a
RK
1293static int c_cookie(struct conn *c,
1294 char **vec,
1295 int attribute((unused)) nvec) {
1296 const char *host;
1297 char *user;
eb5dc014 1298 rights_type rights;
b12be54a
RK
1299
1300 /* Can't log in twice on the same connection */
1301 if(c->who) {
1302 sink_writes(ev_writer_sink(c->w), "530 already authenticated\n");
1303 return 1;
1304 }
1305 /* Get some kind of peer identifcation */
1306 if(!(host = connection_host(c))) {
1307 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
1308 return 1;
1309 }
1310 /* Check the cookie */
eb5dc014 1311 user = verify_cookie(vec[0], &rights);
b12be54a
RK
1312 if(!user) {
1313 sink_writes(ev_writer_sink(c->w), "530 authentication failure\n");
1314 return 1;
1315 }
1316 /* Log in */
e48c28bb 1317 c->who = user;
b12be54a 1318 c->cookie = vec[0];
eb5dc014 1319 c->rights = rights;
30365519 1320 if(strcmp(host, "local"))
2e9ba080 1321 disorder_info("S%x %s connected with cookie from %s", c->tag, user, host);
30365519 1322 else
eb5dc014 1323 c->rights |= RIGHT__LOCAL;
0227f67d
RK
1324 /* Response contains username so client knows who they are acting as */
1325 sink_printf(ev_writer_sink(c->w), "232 %s\n", quoteutf8(user));
b12be54a
RK
1326 return 1;
1327}
1328
1329static int c_make_cookie(struct conn *c,
1330 char attribute((unused)) **vec,
1331 int attribute((unused)) nvec) {
1332 const char *cookie = make_cookie(c->who);
1333
1334 if(cookie)
eb5dc014 1335 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(cookie));
b12be54a
RK
1336 else
1337 sink_writes(ev_writer_sink(c->w), "550 Cannot create cookie\n");
1338 return 1;
1339}
1340
1341static int c_revoke(struct conn *c,
1342 char attribute((unused)) **vec,
1343 int attribute((unused)) nvec) {
1344 if(c->cookie) {
1345 revoke_cookie(c->cookie);
1346 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1347 } else
b60ceb3c 1348 sink_writes(ev_writer_sink(c->w), "510 Did not log in with cookie\n");
b12be54a
RK
1349 return 1;
1350}
1351
f0feb22e
RK
1352static int c_adduser(struct conn *c,
1353 char **vec,
0f55e905
RK
1354 int nvec) {
1355 const char *rights;
1356
810b8083 1357 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
2e9ba080 1358 disorder_error(0, "S%x: remote adduser", c->tag);
b60ceb3c 1359 sink_writes(ev_writer_sink(c->w), "510 Remote user management is disabled\n");
810b8083
RK
1360 return 1;
1361 }
0f55e905
RK
1362 if(nvec > 2) {
1363 rights = vec[2];
1364 if(parse_rights(vec[2], 0, 1)) {
1365 sink_writes(ev_writer_sink(c->w), "550 Invalid rights list\n");
1366 return -1;
1367 }
1368 } else
1369 rights = config->default_rights;
1370 if(trackdb_adduser(vec[0], vec[1], rights,
ba39faf6 1371 0/*email*/, 0/*confirmation*/))
f0feb22e
RK
1372 sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
1373 else
1374 sink_writes(ev_writer_sink(c->w), "250 User created\n");
1375 return 1;
1376}
1377
1378static int c_deluser(struct conn *c,
1379 char **vec,
1380 int attribute((unused)) nvec) {
0126692c 1381 struct conn *d;
1382
810b8083 1383 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
2e9ba080 1384 disorder_error(0, "S%x: remote deluser", c->tag);
b60ceb3c 1385 sink_writes(ev_writer_sink(c->w), "510 Remote user management is disabled\n");
810b8083
RK
1386 return 1;
1387 }
0126692c 1388 if(trackdb_deluser(vec[0])) {
ba39faf6 1389 sink_writes(ev_writer_sink(c->w), "550 Cannot delete user\n");
0126692c 1390 return 1;
1391 }
1392 /* Zap connections belonging to deleted user */
1393 for(d = connections; d; d = d->next)
1394 if(!strcmp(d->who, vec[0]))
1395 d->rights = 0;
1396 sink_writes(ev_writer_sink(c->w), "250 User deleted\n");
f0feb22e
RK
1397 return 1;
1398}
1399
1400static int c_edituser(struct conn *c,
5df73aeb 1401 char **vec,
f0feb22e 1402 int attribute((unused)) nvec) {
0126692c 1403 struct conn *d;
1404
810b8083 1405 if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) {
2e9ba080 1406 disorder_error(0, "S%x: remote edituser", c->tag);
b60ceb3c 1407 sink_writes(ev_writer_sink(c->w), "510 Remote user management is disabled\n");
810b8083
RK
1408 return 1;
1409 }
eb5dc014
RK
1410 /* RIGHT_ADMIN can do anything; otherwise you can only set your own email
1411 * address and password. */
1412 if((c->rights & RIGHT_ADMIN)
5df73aeb
RK
1413 || (!strcmp(c->who, vec[0])
1414 && (!strcmp(vec[1], "email")
1415 || !strcmp(vec[1], "password")))) {
0126692c 1416 if(trackdb_edituserinfo(vec[0], vec[1], vec[2])) {
5df73aeb 1417 sink_writes(ev_writer_sink(c->w), "550 Failed to change setting\n");
0126692c 1418 return 1;
1419 }
1420 if(!strcmp(vec[1], "password")) {
1421 /* Zap all connections for this user after a password change */
1422 for(d = connections; d; d = d->next)
1423 if(!strcmp(d->who, vec[0]))
1424 d->rights = 0;
1425 } else if(!strcmp(vec[1], "rights")) {
1426 /* Update rights for this user */
1427 rights_type r;
1428
ad492e00
RK
1429 if(!parse_rights(vec[2], &r, 1)) {
1430 const char *new_rights = rights_string(r);
1431 for(d = connections; d; d = d->next) {
1432 if(!strcmp(d->who, vec[0])) {
1433 /* Update rights */
0126692c 1434 d->rights = r;
ad492e00
RK
1435 /* Notify any log connections */
1436 if(d->lo)
1437 sink_printf(ev_writer_sink(d->w),
75e7b7c3 1438 "%"PRIxMAX" rights_changed %s\n",
4265e5d3 1439 (uintmax_t)xtime(0),
75e7b7c3 1440 quoteutf8(new_rights));
ad492e00
RK
1441 }
1442 }
1443 }
0126692c 1444 }
1445 sink_writes(ev_writer_sink(c->w), "250 OK\n");
834e7c4a 1446 } else {
2e9ba080
RK
1447 disorder_error(0, "%s attempted edituser but lacks required rights",
1448 c->who);
b4a80f69 1449 sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n");
834e7c4a 1450 }
f0feb22e
RK
1451 return 1;
1452}
1453
1454static int c_userinfo(struct conn *c,
1455 char attribute((unused)) **vec,
1456 int attribute((unused)) nvec) {
5df73aeb
RK
1457 struct kvp *k;
1458 const char *value;
eb5dc014 1459
39e7dcfb
RK
1460 /* We allow remote querying of rights so that clients can figure out what
1461 * they're allowed to do */
1462 if(!config->remote_userman
1463 && !(c->rights & RIGHT__LOCAL)
1464 && strcmp(vec[1], "rights")) {
2e9ba080 1465 disorder_error(0, "S%x: remote userinfo %s %s", c->tag, vec[0], vec[1]);
b60ceb3c 1466 sink_writes(ev_writer_sink(c->w), "510 Remote user management is disabled\n");
810b8083
RK
1467 return 1;
1468 }
eb5dc014 1469 /* RIGHT_ADMIN allows anything; otherwise you can only get your own email
29f5fbd2 1470 * address and rights list. */
eb5dc014 1471 if((c->rights & RIGHT_ADMIN)
5df73aeb
RK
1472 || (!strcmp(c->who, vec[0])
1473 && (!strcmp(vec[1], "email")
1474 || !strcmp(vec[1], "rights")))) {
1475 if((k = trackdb_getuserinfo(vec[0])))
1476 if((value = kvp_get(k, vec[1])))
1477 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(value));
1478 else
1479 sink_writes(ev_writer_sink(c->w), "555 Not set\n");
1480 else
1481 sink_writes(ev_writer_sink(c->w), "550 No such user\n");
834e7c4a 1482 } else {
2e9ba080
RK
1483 disorder_error(0, "%s attempted userinfo but lacks required rights",
1484 c->who);
b4a80f69 1485 sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n");
834e7c4a 1486 }
f0feb22e
RK
1487 return 1;
1488}
1489
c3be4f19
RK
1490static int c_users(struct conn *c,
1491 char attribute((unused)) **vec,
1492 int attribute((unused)) nvec) {
ddbf05c8 1493 return list_response(c, "User list follows", trackdb_listusers());
c3be4f19
RK
1494}
1495
ba39faf6
RK
1496static int c_register(struct conn *c,
1497 char **vec,
1498 int attribute((unused)) nvec) {
53710d44
RK
1499 char *cs;
1500 uint32_t nonce[CONFIRM_SIZE];
1501 char nonce_str[(32 * CONFIRM_SIZE) / 5 + 1];
1502
1503 /* The confirmation string is username/base62(nonce). The confirmation
1504 * process will pick the username back out to identify them but the _whole_
1505 * string is used as the confirmation string. Base 62 means we used only
1506 * letters and digits, minimizing the chance of the URL being mispasted. */
1507 gcry_randomize(nonce, sizeof nonce, GCRY_STRONG_RANDOM);
1508 if(basen(nonce, CONFIRM_SIZE, nonce_str, sizeof nonce_str, 62)) {
2e9ba080 1509 disorder_error(0, "buffer too small encoding confirmation string");
53710d44
RK
1510 sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
1511 }
1512 byte_xasprintf(&cs, "%s/%s", vec[0], nonce_str);
ba39faf6
RK
1513 if(trackdb_adduser(vec[0], vec[1], config->default_rights, vec[2], cs))
1514 sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n");
1515 else
1516 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(cs));
1517 return 1;
1518}
1519
1520static int c_confirm(struct conn *c,
1521 char **vec,
1522 int attribute((unused)) nvec) {
ba39faf6 1523 char *user, *sep;
30365519 1524 rights_type rights;
1525 const char *host;
ba39faf6 1526
30365519 1527 /* Get some kind of peer identifcation */
1528 if(!(host = connection_host(c))) {
1529 sink_writes(ev_writer_sink(c->w), "530 Authentication failure\n");
1530 return 1;
1531 }
53710d44
RK
1532 /* Picking the LAST / means we don't (here) rule out slashes in usernames. */
1533 if(!(sep = strrchr(vec[0], '/'))) {
ba39faf6
RK
1534 sink_writes(ev_writer_sink(c->w), "550 Malformed confirmation string\n");
1535 return 1;
1536 }
53710d44 1537 user = xstrndup(vec[0], sep - vec[0]);
30365519 1538 if(trackdb_confirm(user, vec[0], &rights))
b60ceb3c 1539 sink_writes(ev_writer_sink(c->w), "510 Incorrect confirmation string\n");
30365519 1540 else {
1541 c->who = user;
1542 c->cookie = 0;
1543 c->rights = rights;
1544 if(strcmp(host, "local"))
2e9ba080 1545 disorder_info("S%x %s confirmed from %s", c->tag, user, host);
30365519 1546 else
1547 c->rights |= RIGHT__LOCAL;
1548 /* Response contains username so client knows who they are acting as */
1549 sink_printf(ev_writer_sink(c->w), "232 %s\n", quoteutf8(user));
1550 }
ba39faf6
RK
1551 return 1;
1552}
6207d2f3 1553
1554static int sent_reminder(ev_source attribute((unused)) *ev,
1555 pid_t attribute((unused)) pid,
1556 int status,
1557 const struct rusage attribute((unused)) *rusage,
1558 void *u) {
1559 struct conn *const c = u;
1560
1561 /* Tell the client what went down */
1562 if(!status) {
1563 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1564 } else {
2e9ba080 1565 disorder_error(0, "reminder subprocess %s", wstat(status));
6207d2f3 1566 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1567 }
1568 /* Re-enable this connection */
1569 ev_reader_enable(c->r);
1570 return 0;
1571}
1572
1573static int c_reminder(struct conn *c,
1574 char **vec,
1575 int attribute((unused)) nvec) {
1576 struct kvp *k;
1577 const char *password, *email, *text, *encoding, *charset, *content_type;
1578 const time_t *last;
1579 time_t now;
1580 pid_t pid;
1581
1582 static hash *last_reminder;
1583
1584 if(!config->mail_sender) {
2e9ba080 1585 disorder_error(0, "cannot send password reminders because mail_sender not set");
6207d2f3 1586 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1587 return 1;
1588 }
1589 if(!(k = trackdb_getuserinfo(vec[0]))) {
2e9ba080 1590 disorder_error(0, "reminder for user '%s' who does not exist", vec[0]);
6207d2f3 1591 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1592 return 1;
1593 }
1594 if(!(email = kvp_get(k, "email"))
33e95f03 1595 || !email_valid(email)) {
2e9ba080 1596 disorder_error(0, "user '%s' has no valid email address", vec[0]);
6207d2f3 1597 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1598 return 1;
1599 }
1600 if(!(password = kvp_get(k, "password"))
1601 || !*password) {
2e9ba080 1602 disorder_error(0, "user '%s' has no password", vec[0]);
6207d2f3 1603 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1604 return 1;
1605 }
1606 /* Rate-limit reminders. This hash is bounded in size by the number of
1607 * users. If this is actually a problem for anyone then we can periodically
1608 * clean it. */
1609 if(!last_reminder)
1610 last_reminder = hash_new(sizeof (time_t));
1611 last = hash_find(last_reminder, vec[0]);
4265e5d3 1612 xtime(&now);
6207d2f3 1613 if(last && now < *last + config->reminder_interval) {
2e9ba080 1614 disorder_error(0, "sent a password reminder to '%s' too recently", vec[0]);
6207d2f3 1615 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1616 return 1;
1617 }
1618 /* Send the reminder */
1619 /* TODO this should be templatized and to some extent merged with
1620 * the code in act_register() */
1621 byte_xasprintf((char **)&text,
1622"Someone requested that you be sent a reminder of your DisOrder password.\n"
1623"Your password is:\n"
1624"\n"
1625" %s\n", password);
1626 if(!(text = mime_encode_text(text, &charset, &encoding)))
2e9ba080 1627 disorder_fatal(0, "cannot encode email");
6207d2f3 1628 byte_xasprintf((char **)&content_type, "text/plain;charset=%s",
1629 quote822(charset, 0));
1630 pid = sendmail_subprocess("", config->mail_sender, email,
1631 "DisOrder password reminder",
1632 encoding, content_type, text);
1633 if(pid < 0) {
1634 sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n");
1635 return 1;
1636 }
1637 hash_add(last_reminder, vec[0], &now, HASH_INSERT_OR_REPLACE);
2e9ba080 1638 disorder_info("sending a passsword reminder to user '%s'", vec[0]);
6207d2f3 1639 /* We can only continue when the subprocess finishes */
1640 ev_child(c->ev, pid, 0, sent_reminder, c);
1641 return 0;
1642}
1643
2b33c4cf
RK
1644static int c_schedule_list(struct conn *c,
1645 char attribute((unused)) **vec,
1646 int attribute((unused)) nvec) {
1647 char **ids = schedule_list(0);
1648 sink_writes(ev_writer_sink(c->w), "253 ID list follows\n");
1649 while(*ids)
1650 sink_printf(ev_writer_sink(c->w), "%s\n", *ids++);
1651 sink_writes(ev_writer_sink(c->w), ".\n");
1652 return 1; /* completed */
1653}
1654
1655static int c_schedule_get(struct conn *c,
1656 char **vec,
1657 int attribute((unused)) nvec) {
1658 struct kvp *actiondata = schedule_get(vec[0]), *k;
1659
1660 if(!actiondata) {
1661 sink_writes(ev_writer_sink(c->w), "555 No such event\n");
1662 return 1; /* completed */
1663 }
1664 /* Scheduled events are public information. Anyone with RIGHT_READ can see
1665 * them. */
1666 sink_writes(ev_writer_sink(c->w), "253 Event information follows\n");
1667 for(k = actiondata; k; k = k->next)
1668 sink_printf(ev_writer_sink(c->w), " %s %s\n",
1669 quoteutf8(k->name), quoteutf8(k->value));
1670 sink_writes(ev_writer_sink(c->w), ".\n");
1671 return 1; /* completed */
1672}
1673
1674static int c_schedule_del(struct conn *c,
1675 char **vec,
1676 int attribute((unused)) nvec) {
1677 struct kvp *actiondata = schedule_get(vec[0]);
1678
1679 if(!actiondata) {
1680 sink_writes(ev_writer_sink(c->w), "555 No such event\n");
1681 return 1; /* completed */
1682 }
1683 /* If you have admin rights you can delete anything. If you don't then you
1684 * can only delete your own scheduled events. */
1685 if(!(c->rights & RIGHT_ADMIN)) {
1686 const char *who = kvp_get(actiondata, "who");
1687
1688 if(!who || !c->who || strcmp(who, c->who)) {
b60ceb3c 1689 sink_writes(ev_writer_sink(c->w), "510 Not authorized\n");
2b33c4cf
RK
1690 return 1; /* completed */
1691 }
1692 }
1693 if(schedule_del(vec[0]))
1694 sink_writes(ev_writer_sink(c->w), "550 Could not delete scheduled event\n");
1695 else
1696 sink_writes(ev_writer_sink(c->w), "250 Deleted\n");
1697 return 1; /* completed */
1698}
1699
1700static int c_schedule_add(struct conn *c,
1701 char **vec,
1702 int nvec) {
1703 struct kvp *actiondata = 0;
067eeb5f 1704 const char *id;
2b33c4cf
RK
1705
1706 /* Standard fields */
1707 kvp_set(&actiondata, "who", c->who);
1708 kvp_set(&actiondata, "when", vec[0]);
1709 kvp_set(&actiondata, "priority", vec[1]);
1710 kvp_set(&actiondata, "action", vec[2]);
1711 /* Action-dependent fields */
1712 if(!strcmp(vec[2], "play")) {
1713 if(nvec != 4) {
1714 sink_writes(ev_writer_sink(c->w), "550 Wrong number of arguments\n");
1715 return 1;
1716 }
1717 if(!trackdb_exists(vec[3])) {
1718 sink_writes(ev_writer_sink(c->w), "550 Track is not in database\n");
1719 return 1;
1720 }
1721 kvp_set(&actiondata, "track", vec[3]);
1722 } else if(!strcmp(vec[2], "set-global")) {
1723 if(nvec < 4 || nvec > 5) {
1724 sink_writes(ev_writer_sink(c->w), "550 Wrong number of arguments\n");
1725 return 1;
1726 }
1727 kvp_set(&actiondata, "key", vec[3]);
1728 if(nvec > 4)
1729 kvp_set(&actiondata, "value", vec[4]);
1730 } else {
1731 sink_writes(ev_writer_sink(c->w), "550 Unknown action\n");
1732 return 1;
1733 }
1734 /* schedule_add() checks user rights */
1735 id = schedule_add(c->ev, actiondata);
1736 if(!id)
1737 sink_writes(ev_writer_sink(c->w), "550 Cannot add scheduled event\n");
1738 else
1739 sink_printf(ev_writer_sink(c->w), "252 %s\n", id);
1740 return 1;
1741}
1742
d42e98ca
RK
1743static int c_adopt(struct conn *c,
1744 char **vec,
1745 int attribute((unused)) nvec) {
1746 struct queue_entry *q;
1747
1748 if(!c->who) {
1749 sink_writes(ev_writer_sink(c->w), "550 no identity\n");
1750 return 1;
1751 }
1752 if(!(q = queue_find(vec[0]))) {
1753 sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n");
1754 return 1;
1755 }
1756 if(q->origin != origin_random) {
1757 sink_writes(ev_writer_sink(c->w), "550 not a random track\n");
1758 return 1;
1759 }
1760 q->origin = origin_adopted;
1761 q->submitter = xstrdup(c->who);
1762 eventlog("adopted", q->id, q->submitter, (char *)0);
1763 queue_write();
1764 sink_writes(ev_writer_sink(c->w), "250 OK\n");
1765 return 1;
1766}
1767
ddbf05c8
RK
1768static int playlist_response(struct conn *c,
1769 int err) {
1770 switch(err) {
1771 case 0:
1772 assert(!"cannot cope with success");
1773 case EACCES:
b60ceb3c 1774 sink_writes(ev_writer_sink(c->w), "510 Access denied\n");
ddbf05c8
RK
1775 break;
1776 case EINVAL:
1777 sink_writes(ev_writer_sink(c->w), "550 Invalid playlist name\n");
1778 break;
1779 case ENOENT:
1780 sink_writes(ev_writer_sink(c->w), "555 No such playlist\n");
1781 break;
1782 default:
1783 sink_writes(ev_writer_sink(c->w), "550 Error accessing playlist\n");
1784 break;
1785 }
1786 return 1;
1787}
1788
1789static int c_playlist_get(struct conn *c,
1790 char **vec,
1791 int attribute((unused)) nvec) {
1792 char **tracks;
1793 int err;
1794
1795 if(!(err = trackdb_playlist_get(vec[0], c->who, &tracks, 0, 0)))
1796 return list_response(c, "Playlist contents follows", tracks);
1797 else
1798 return playlist_response(c, err);
1799}
1800
1801static int c_playlist_set(struct conn *c,
1802 char **vec,
1803 int attribute((unused)) nvec) {
f65f5aff
RK
1804 return fetch_body(c, c_playlist_set_body, vec[0]);
1805}
1806
1807static int c_playlist_set_body(struct conn *c,
1808 char **body,
1809 int nbody,
1810 void *u) {
1811 const char *playlist = u;
1812 int err;
1813
440af55d
RK
1814 if(!c->locked_playlist
1815 || strcmp(playlist, c->locked_playlist)) {
1816 sink_writes(ev_writer_sink(c->w), "550 Playlist is not locked\n");
1817 return 1;
1818 }
f65f5aff
RK
1819 if(!(err = trackdb_playlist_set(playlist, c->who,
1820 body, nbody, 0))) {
1821 sink_printf(ev_writer_sink(c->w), "250 OK\n");
1822 return 1;
1823 } else
1824 return playlist_response(c, err);
ddbf05c8
RK
1825}
1826
1827static int c_playlist_get_share(struct conn *c,
1828 char **vec,
1829 int attribute((unused)) nvec) {
1830 char *share;
1831 int err;
1832
1833 if(!(err = trackdb_playlist_get(vec[0], c->who, 0, 0, &share))) {
f65f5aff 1834 sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(share));
ddbf05c8
RK
1835 return 1;
1836 } else
1837 return playlist_response(c, err);
1838}
1839
1840static int c_playlist_set_share(struct conn *c,
1841 char **vec,
1842 int attribute((unused)) nvec) {
1843 int err;
1844
1845 if(!(err = trackdb_playlist_set(vec[0], c->who, 0, 0, vec[1]))) {
f65f5aff 1846 sink_printf(ev_writer_sink(c->w), "250 OK\n");
ddbf05c8
RK
1847 return 1;
1848 } else
1849 return playlist_response(c, err);
1850}
1851
1852static int c_playlists(struct conn *c,
1853 char attribute((unused)) **vec,
1854 int attribute((unused)) nvec) {
1855 char **p;
1856
1857 trackdb_playlist_list(c->who, &p, 0);
1858 return list_response(c, "List of playlists follows", p);
1859}
1860
1861static int c_playlist_delete(struct conn *c,
1862 char **vec,
1863 int attribute((unused)) nvec) {
1864 int err;
1865
1866 if(!(err = trackdb_playlist_delete(vec[0], c->who))) {
f65f5aff 1867 sink_writes(ev_writer_sink(c->w), "250 OK\n");
ddbf05c8
RK
1868 return 1;
1869 } else
1870 return playlist_response(c, err);
1871}
1872
1873static int c_playlist_lock(struct conn *c,
1874 char **vec,
1875 int attribute((unused)) nvec) {
1876 int err;
1877 struct conn *cc;
1878
1879 /* Check we're allowed to modify this playlist */
1880 if((err = trackdb_playlist_set(vec[0], c->who, 0, 0, 0)))
1881 return playlist_response(c, err);
1882 /* If we hold a lock don't allow a new one */
1883 if(c->locked_playlist) {
1884 sink_writes(ev_writer_sink(c->w), "550 Already holding a lock\n");
1885 return 1;
1886 }
1887 /* See if some other connection locks the same playlist */
1888 for(cc = connections; cc; cc = cc->next)
1889 if(cc->locked_playlist && !strcmp(cc->locked_playlist, vec[0]))
1890 break;
1891 if(cc) {
1892 /* TODO: implement config->playlist_lock_timeout */
1893 sink_writes(ev_writer_sink(c->w), "550 Already locked\n");
1894 return 1;
1895 }
1896 c->locked_playlist = xstrdup(vec[0]);
1897 time(&c->locked_when);
1898 sink_writes(ev_writer_sink(c->w), "250 Acquired lock\n");
1899 return 1;
1900}
1901
1902static int c_playlist_unlock(struct conn *c,
f65f5aff 1903 char attribute((unused)) **vec,
ddbf05c8
RK
1904 int attribute((unused)) nvec) {
1905 if(!c->locked_playlist) {
1906 sink_writes(ev_writer_sink(c->w), "550 Not holding a lock\n");
1907 return 1;
1908 }
1909 c->locked_playlist = 0;
1910 sink_writes(ev_writer_sink(c->w), "250 Released lock\n");
1911 return 1;
1912}
1913
598b07b7
RK
1914/** @brief Server's definition of a command */
1915static const struct server_command {
eb5dc014 1916 /** @brief Command name */
460b9539 1917 const char *name;
eb5dc014
RK
1918
1919 /** @brief Minimum number of arguments */
1920 int minargs;
1921
1922 /** @brief Maximum number of arguments */
1923 int maxargs;
1924
1925 /** @brief Function to process command */
460b9539 1926 int (*fn)(struct conn *, char **, int);
eb5dc014
RK
1927
1928 /** @brief Rights required to execute command
1929 *
1930 * 0 means that the command can be issued without logging in. If multiple
1931 * bits are listed here any of those rights will do.
1932 */
1933 rights_type rights;
460b9539 1934} commands[] = {
a6e44aa2 1935 { "adduser", 2, 3, c_adduser, RIGHT_ADMIN },
d42e98ca 1936 { "adopt", 1, 1, c_adopt, RIGHT_PLAY },
eb5dc014 1937 { "allfiles", 0, 2, c_allfiles, RIGHT_READ },
ba39faf6 1938 { "confirm", 1, 1, c_confirm, 0 },
b12be54a 1939 { "cookie", 1, 1, c_cookie, 0 },
a6e44aa2 1940 { "deluser", 1, 1, c_deluser, RIGHT_ADMIN },
eb5dc014
RK
1941 { "dirs", 0, 2, c_dirs, RIGHT_READ },
1942 { "disable", 0, 1, c_disable, RIGHT_GLOBAL_PREFS },
1943 { "edituser", 3, 3, c_edituser, RIGHT_ADMIN|RIGHT_USERINFO },
1944 { "enable", 0, 0, c_enable, RIGHT_GLOBAL_PREFS },
1945 { "enabled", 0, 0, c_enabled, RIGHT_READ },
1946 { "exists", 1, 1, c_exists, RIGHT_READ },
1947 { "files", 0, 2, c_files, RIGHT_READ },
1948 { "get", 2, 2, c_get, RIGHT_READ },
1949 { "get-global", 1, 1, c_get_global, RIGHT_READ },
1950 { "length", 1, 1, c_length, RIGHT_READ },
1951 { "log", 0, 0, c_log, RIGHT_READ },
1952 { "make-cookie", 0, 0, c_make_cookie, RIGHT_READ },
1953 { "move", 2, 2, c_move, RIGHT_MOVE__MASK },
1954 { "moveafter", 1, INT_MAX, c_moveafter, RIGHT_MOVE__MASK },
1955 { "new", 0, 1, c_new, RIGHT_READ },
1956 { "nop", 0, 0, c_nop, 0 },
1957 { "part", 3, 3, c_part, RIGHT_READ },
1958 { "pause", 0, 0, c_pause, RIGHT_PAUSE },
1959 { "play", 1, 1, c_play, RIGHT_PLAY },
7a853280 1960 { "playafter", 2, INT_MAX, c_playafter, RIGHT_PLAY },
eb5dc014 1961 { "playing", 0, 0, c_playing, RIGHT_READ },
ddbf05c8 1962 { "playlist-delete", 1, 1, c_playlist_delete, RIGHT_PLAY },
fc80bbcd
RK
1963 { "playlist-get", 1, 1, c_playlist_get, RIGHT_READ },
1964 { "playlist-get-share", 1, 1, c_playlist_get_share, RIGHT_READ },
ddbf05c8
RK
1965 { "playlist-lock", 1, 1, c_playlist_lock, RIGHT_PLAY },
1966 { "playlist-set", 1, 1, c_playlist_set, RIGHT_PLAY },
1967 { "playlist-set-share", 2, 2, c_playlist_set_share, RIGHT_PLAY },
1968 { "playlist-unlock", 0, 0, c_playlist_unlock, RIGHT_PLAY },
fc80bbcd 1969 { "playlists", 0, 0, c_playlists, RIGHT_READ },
eb5dc014
RK
1970 { "prefs", 1, 1, c_prefs, RIGHT_READ },
1971 { "queue", 0, 0, c_queue, RIGHT_READ },
1972 { "random-disable", 0, 0, c_random_disable, RIGHT_GLOBAL_PREFS },
1973 { "random-enable", 0, 0, c_random_enable, RIGHT_GLOBAL_PREFS },
1974 { "random-enabled", 0, 0, c_random_enabled, RIGHT_READ },
1975 { "recent", 0, 0, c_recent, RIGHT_READ },
1976 { "reconfigure", 0, 0, c_reconfigure, RIGHT_ADMIN },
a6e44aa2 1977 { "register", 3, 3, c_register, RIGHT_REGISTER },
6207d2f3 1978 { "reminder", 1, 1, c_reminder, RIGHT__LOCAL },
eb5dc014 1979 { "remove", 1, 1, c_remove, RIGHT_REMOVE__MASK },
dd9af5cb 1980 { "rescan", 0, INT_MAX, c_rescan, RIGHT_RESCAN },
eb5dc014
RK
1981 { "resolve", 1, 1, c_resolve, RIGHT_READ },
1982 { "resume", 0, 0, c_resume, RIGHT_PAUSE },
1983 { "revoke", 0, 0, c_revoke, RIGHT_READ },
1984 { "rtp-address", 0, 0, c_rtp_address, 0 },
b0116b5c
RK
1985 { "rtp-cancel", 0, 0, c_rtp_cancel, 0 },
1986 { "rtp-request", 2, 2, c_rtp_request, RIGHT_READ },
2b33c4cf
RK
1987 { "schedule-add", 3, INT_MAX, c_schedule_add, RIGHT_READ },
1988 { "schedule-del", 1, 1, c_schedule_del, RIGHT_READ },
1989 { "schedule-get", 1, 1, c_schedule_get, RIGHT_READ },
1990 { "schedule-list", 0, 0, c_schedule_list, RIGHT_READ },
eb5dc014
RK
1991 { "scratch", 0, 1, c_scratch, RIGHT_SCRATCH__MASK },
1992 { "search", 1, 1, c_search, RIGHT_READ },
1993 { "set", 3, 3, c_set, RIGHT_PREFS, },
1994 { "set-global", 2, 2, c_set_global, RIGHT_GLOBAL_PREFS },
1995 { "shutdown", 0, 0, c_shutdown, RIGHT_ADMIN },
1996 { "stats", 0, 0, c_stats, RIGHT_READ },
1997 { "tags", 0, 0, c_tags, RIGHT_READ },
1998 { "unset", 2, 2, c_set, RIGHT_PREFS },
1999 { "unset-global", 1, 1, c_set_global, RIGHT_GLOBAL_PREFS },
460b9539 2000 { "user", 2, 2, c_user, 0 },
eb5dc014
RK
2001 { "userinfo", 2, 2, c_userinfo, RIGHT_READ },
2002 { "users", 0, 0, c_users, RIGHT_READ },
2003 { "version", 0, 0, c_version, RIGHT_READ },
2004 { "volume", 0, 2, c_volume, RIGHT_READ|RIGHT_VOLUME }
460b9539 2005};
2006
f65f5aff
RK
2007/** @brief Fetch a command body
2008 * @param c Connection
2009 * @param body_callback Called with body
2010 * @param u Passed to body_callback
2011 * @return 1
2012 */
2013static int fetch_body(struct conn *c,
2014 body_callback_type body_callback,
2015 void *u) {
2016 assert(c->line_reader == command);
2017 c->line_reader = body_line;
2018 c->body_callback = body_callback;
2019 c->body_u = u;
2020 vector_init(c->body);
2021 return 1;
2022}
2023
2024/** @brief @ref line_reader_type callback for command body lines
2025 * @param c Connection
2026 * @param line Line
2027 * @return 1 if complete, 0 if incomplete
2028 *
2029 * Called from reader_callback().
2030 */
2031static int body_line(struct conn *c,
2032 char *line) {
2033 if(*line == '.') {
2034 ++line;
2035 if(!*line) {
2036 /* That's the lot */
2037 c->line_reader = command;
2038 vector_terminate(c->body);
2039 return c->body_callback(c, c->body->vec, c->body->nvec, c->body_u);
2040 }
2041 }
2042 vector_append(c->body, xstrdup(line));
2043 return 1; /* completed */
2044}
2045
460b9539 2046static void command_error(const char *msg, void *u) {
2047 struct conn *c = u;
2048
2049 sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg);
2050}
2051
f65f5aff
RK
2052/** @brief @ref line_reader_type callback for commands
2053 * @param c Connection
2054 * @param line Line
2055 * @return 1 if complete, 0 if incomplete
2056 *
2057 * Called from reader_callback().
2058 */
460b9539 2059static int command(struct conn *c, char *line) {
2060 char **vec;
2061 int nvec, n;
2062
2063 D(("server command %s", line));
f9635e06
RK
2064 /* We force everything into NFC as early as possible */
2065 if(!(line = utf8_compose_canon(line, strlen(line), 0))) {
2066 sink_writes(ev_writer_sink(c->w), "500 cannot normalize command\n");
2067 return 1;
2068 }
460b9539 2069 if(!(vec = split(line, &nvec, SPLIT_QUOTES, command_error, c))) {
2070 sink_writes(ev_writer_sink(c->w), "500 cannot parse command\n");
2071 return 1;
2072 }
2073 if(nvec == 0) {
2074 sink_writes(ev_writer_sink(c->w), "500 do what?\n");
2075 return 1;
2076 }
ba937f01 2077 if((n = TABLE_FIND(commands, name, vec[0])) < 0)
460b9539 2078 sink_writes(ev_writer_sink(c->w), "500 unknown command\n");
2079 else {
eb5dc014
RK
2080 if(commands[n].rights
2081 && !(c->rights & commands[n].rights)) {
2e9ba080
RK
2082 disorder_error(0, "%s attempted %s but lacks required rights",
2083 c->who ? c->who : "NULL",
834e7c4a 2084 commands[n].name);
b4a80f69 2085 sink_writes(ev_writer_sink(c->w), "510 Prohibited\n");
460b9539 2086 return 1;
2087 }
2088 ++vec;
2089 --nvec;
2090 if(nvec < commands[n].minargs) {
2091 sink_writes(ev_writer_sink(c->w), "500 missing argument(s)\n");
2092 return 1;
2093 }
2094 if(nvec > commands[n].maxargs) {
2095 sink_writes(ev_writer_sink(c->w), "500 too many arguments\n");
2096 return 1;
2097 }
2098 return commands[n].fn(c, vec, nvec);
2099 }
2100 return 1; /* completed */
2101}
2102
2103/* redirect to the right reader callback for our current state */
2104static int redirect_reader_callback(ev_source *ev,
2105 ev_reader *reader,
460b9539 2106 void *ptr,
2107 size_t bytes,
2108 int eof,
2109 void *u) {
2110 struct conn *c = u;
2111
75d64210 2112 return c->reader(ev, reader, ptr, bytes, eof, u);
460b9539 2113}
2114
2115/* the main command reader */
2116static int reader_callback(ev_source attribute((unused)) *ev,
2117 ev_reader *reader,
460b9539 2118 void *ptr,
2119 size_t bytes,
2120 int eof,
2121 void *u) {
2122 struct conn *c = u;
2123 char *eol;
2124 int complete;
2125
2126 D(("server reader_callback"));
2127 while((eol = memchr(ptr, '\n', bytes))) {
2128 *eol++ = 0;
2129 ev_reader_consume(reader, eol - (char *)ptr);
f65f5aff 2130 complete = c->line_reader(c, ptr); /* usually command() */
460b9539 2131 bytes -= (eol - (char *)ptr);
2132 ptr = eol;
2133 if(!complete) {
2134 /* the command had better have set a new reader callback */
2135 if(bytes || eof)
2136 /* there are further bytes to read, or we are at eof; arrange for the
2137 * command's reader callback to handle them */
2138 return ev_reader_incomplete(reader);
2139 /* nothing's going on right now */
2140 return 0;
2141 }
2142 /* command completed, we can go around and handle the next one */
2143 }
2144 if(eof) {
2145 if(bytes)
2e9ba080 2146 disorder_error(0, "S%x unterminated line", c->tag);
8d8b8c1f 2147 D(("normal reader close"));
397ef7bb
RK
2148 c->r = 0;
2149 if(c->w) {
8d8b8c1f 2150 D(("close associated writer"));
397ef7bb
RK
2151 ev_writer_close(c->w);
2152 c->w = 0;
2153 }
0126692c 2154 remove_connection(c);
460b9539 2155 }
2156 return 0;
2157}
2158
2159static int listen_callback(ev_source *ev,
2160 int fd,
2161 const struct sockaddr attribute((unused)) *remote,
2162 socklen_t attribute((unused)) rlen,
2163 void *u) {
2164 const struct listener *l = u;
2165 struct conn *c = xmalloc(sizeof *c);
2166 static unsigned tags;
2167
2168 D(("server listen_callback fd %d (%s)", fd, l->name));
2169 nonblock(fd);
2170 cloexec(fd);
ad492e00 2171 c->next = connections;
460b9539 2172 c->tag = tags++;
2173 c->ev = ev;
e8c92ba7
RK
2174 c->w = ev_writer_new(ev, fd, writer_error, c,
2175 "client writer");
31e2a93e 2176 if(!c->w) {
2e9ba080 2177 disorder_error(0, "ev_writer_new for file inbound connection (fd=%d) failed",
31e2a93e
RK
2178 fd);
2179 close(fd);
2180 return 0;
2181 }
e8c92ba7
RK
2182 c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c,
2183 "client reader");
31e2a93e
RK
2184 if(!c->r)
2185 /* Main reason for failure is the FD is too big and that will already have
2186 * been handled */
2e9ba080
RK
2187 disorder_fatal(0,
2188 "ev_reader_new for file inbound connection (fd=%d) failed",
2189 fd);
75d64210 2190 ev_tie(c->r, c->w);
460b9539 2191 c->fd = fd;
2192 c->reader = reader_callback;
2193 c->l = l;
eb5dc014 2194 c->rights = 0;
f65f5aff 2195 c->line_reader = command;
ad492e00 2196 connections = c;
460b9539 2197 gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM);
7b32e917
RK
2198 sink_printf(ev_writer_sink(c->w), "231 %d %s %s\n",
2199 2,
b3141726
RK
2200 config->authorization_algorithm,
2201 hex(c->nonce, sizeof c->nonce));
460b9539 2202 return 0;
2203}
2204
2205int server_start(ev_source *ev, int pf,
2206 size_t socklen, const struct sockaddr *sa,
de37b640
RK
2207 const char *name,
2208 int privileged) {
460b9539 2209 int fd;
2210 struct listener *l = xmalloc(sizeof *l);
2211 static const int one = 1;
2212
de37b640
RK
2213 D(("server_init socket %s privileged=%d", name, privileged));
2214 /* Sanity check */
2215 if(privileged && pf != AF_UNIX)
2216 disorder_fatal(0, "cannot create a privileged listener on a non-local port");
460b9539 2217 fd = xsocket(pf, SOCK_STREAM, 0);
2218 xsetsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one);
2219 if(bind(fd, sa, socklen) < 0) {
2e9ba080 2220 disorder_error(errno, "error binding to %s", name);
460b9539 2221 return -1;
2222 }
2223 xlisten(fd, 128);
2224 nonblock(fd);
2225 cloexec(fd);
2226 l->name = name;
2227 l->pf = pf;
de37b640 2228 l->privileged = privileged;
e8c92ba7
RK
2229 if(ev_listen(ev, fd, listen_callback, l, "server listener"))
2230 exit(EXIT_FAILURE);
2e9ba080 2231 disorder_info("listening on %s", name);
460b9539 2232 return fd;
2233}
2234
2235int server_stop(ev_source *ev, int fd) {
2236 xclose(fd);
2237 return ev_listen_cancel(ev, fd);
2238}
2239
2240/*
2241Local Variables:
2242c-basic-offset:2
2243comment-column:40
2244fill-column:79
2245End:
2246*/