Commit | Line | Data |
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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
768d7355 | 3 | * Copyright (C) 2004, 2005, 2006, 2007 Richard Kettlewell |
460b9539 | 4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | #include "types.h" | |
23 | ||
24 | #include <pwd.h> | |
25 | #include <sys/types.h> | |
26 | #include <sys/socket.h> | |
27 | #include <sys/time.h> | |
28 | #include <unistd.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
31 | #include <errno.h> | |
32 | #include <fcntl.h> | |
33 | #include <gcrypt.h> | |
34 | #include <stddef.h> | |
35 | #include <time.h> | |
36 | #include <limits.h> | |
37 | #include <pcre.h> | |
38 | #include <netdb.h> | |
39 | #include <netinet/in.h> | |
40 | ||
41 | #include "event.h" | |
42 | #include "server.h" | |
43 | #include "syscalls.h" | |
44 | #include "queue.h" | |
f08c0859 | 45 | #include "server-queue.h" |
460b9539 | 46 | #include "play.h" |
47 | #include "log.h" | |
48 | #include "mem.h" | |
49 | #include "state.h" | |
50 | #include "charset.h" | |
51 | #include "split.h" | |
52 | #include "configuration.h" | |
53 | #include "hex.h" | |
5df73aeb | 54 | #include "rights.h" |
460b9539 | 55 | #include "trackdb.h" |
56 | #include "table.h" | |
57 | #include "kvp.h" | |
58 | #include "mixer.h" | |
59 | #include "sink.h" | |
60 | #include "authhash.h" | |
61 | #include "plugin.h" | |
62 | #include "printf.h" | |
63 | #include "trackname.h" | |
64 | #include "eventlog.h" | |
65 | #include "defs.h" | |
66 | #include "cache.h" | |
f9635e06 | 67 | #include "unicode.h" |
b12be54a | 68 | #include "cookies.h" |
460b9539 | 69 | |
70 | #ifndef NONCE_SIZE | |
71 | # define NONCE_SIZE 16 | |
72 | #endif | |
73 | ||
74 | int volume_left, volume_right; /* last known volume */ | |
75 | ||
18e6d6e6 | 76 | /** @brief Accept all well-formed login attempts |
77 | * | |
78 | * Used in debugging. | |
79 | */ | |
80 | int wideopen; | |
81 | ||
460b9539 | 82 | struct listener { |
83 | const char *name; | |
84 | int pf; | |
85 | }; | |
86 | ||
397ef7bb | 87 | /** @brief One client connection */ |
460b9539 | 88 | struct conn { |
397ef7bb | 89 | /** @brief Read commands from here */ |
460b9539 | 90 | ev_reader *r; |
397ef7bb | 91 | /** @brief Send responses to here */ |
460b9539 | 92 | ev_writer *w; |
397ef7bb | 93 | /** @brief Underlying file descriptor */ |
460b9539 | 94 | int fd; |
397ef7bb | 95 | /** @brief Unique identifier for connection used in log messages */ |
460b9539 | 96 | unsigned tag; |
397ef7bb | 97 | /** @brief Login name or NULL */ |
460b9539 | 98 | char *who; |
397ef7bb | 99 | /** @brief Event loop */ |
460b9539 | 100 | ev_source *ev; |
397ef7bb | 101 | /** @brief Nonce chosen for this connection */ |
460b9539 | 102 | unsigned char nonce[NONCE_SIZE]; |
397ef7bb RK |
103 | /** @brief Current reader callback |
104 | * | |
105 | * We change this depending on whether we're servicing the @b log command | |
106 | */ | |
460b9539 | 107 | ev_reader_callback *reader; |
397ef7bb | 108 | /** @brief Event log output sending to this connection */ |
460b9539 | 109 | struct eventlog_output *lo; |
397ef7bb | 110 | /** @brief Parent listener */ |
460b9539 | 111 | const struct listener *l; |
b12be54a RK |
112 | /** @brief Login cookie or NULL */ |
113 | char *cookie; | |
460b9539 | 114 | }; |
115 | ||
116 | static int reader_callback(ev_source *ev, | |
117 | ev_reader *reader, | |
460b9539 | 118 | void *ptr, |
119 | size_t bytes, | |
120 | int eof, | |
121 | void *u); | |
122 | ||
123 | static const char *noyes[] = { "no", "yes" }; | |
124 | ||
397ef7bb RK |
125 | /** @brief Called when a connection's writer fails or is shut down |
126 | * | |
127 | * If the connection still has a raeder that is cancelled. | |
128 | */ | |
460b9539 | 129 | static int writer_error(ev_source attribute((unused)) *ev, |
460b9539 | 130 | int errno_value, |
131 | void *u) { | |
132 | struct conn *c = u; | |
133 | ||
8d8b8c1f | 134 | D(("server writer_error S%x %d", c->tag, errno_value)); |
460b9539 | 135 | if(errno_value == 0) { |
136 | /* writer is done */ | |
8d8b8c1f | 137 | D(("S%x writer completed", c->tag)); |
460b9539 | 138 | } else { |
139 | if(errno_value != EPIPE) | |
140 | error(errno_value, "S%x write error on socket", c->tag); | |
38b8221f | 141 | if(c->r) { |
8d8b8c1f | 142 | D(("cancel reader")); |
38b8221f RK |
143 | ev_reader_cancel(c->r); |
144 | c->r = 0; | |
145 | } | |
8d8b8c1f | 146 | D(("done cancel reader")); |
460b9539 | 147 | } |
38b8221f | 148 | c->w = 0; |
75d64210 | 149 | ev_report(ev); |
460b9539 | 150 | return 0; |
151 | } | |
152 | ||
397ef7bb RK |
153 | /** @brief Called when a conncetion's reader fails or is shut down |
154 | * | |
155 | * If connection still has a writer then it is closed. | |
156 | */ | |
460b9539 | 157 | static int reader_error(ev_source attribute((unused)) *ev, |
460b9539 | 158 | int errno_value, |
159 | void *u) { | |
160 | struct conn *c = u; | |
161 | ||
8d8b8c1f | 162 | D(("server reader_error S%x %d", c->tag, errno_value)); |
1563f6f6 | 163 | error(errno_value, "S%x read error on socket", c->tag); |
38b8221f RK |
164 | if(c->w) |
165 | ev_writer_close(c->w); | |
166 | c->w = 0; | |
167 | c->r = 0; | |
768d7355 | 168 | ev_report(ev); |
460b9539 | 169 | return 0; |
170 | } | |
171 | ||
397ef7bb | 172 | /** @brief Return true if we are talking to a trusted user */ |
460b9539 | 173 | static int trusted(struct conn *c) { |
174 | int n; | |
175 | ||
176 | for(n = 0; (n < config->trust.n | |
177 | && strcmp(config->trust.s[n], c->who)); ++n) | |
178 | ; | |
179 | return n < config->trust.n; | |
180 | } | |
181 | ||
182 | static int c_disable(struct conn *c, char **vec, int nvec) { | |
183 | if(nvec == 0) | |
184 | disable_playing(c->who); | |
185 | else if(nvec == 1 && !strcmp(vec[0], "now")) | |
186 | disable_playing(c->who); | |
187 | else { | |
188 | sink_writes(ev_writer_sink(c->w), "550 invalid argument\n"); | |
189 | return 1; /* completed */ | |
190 | } | |
191 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
192 | return 1; /* completed */ | |
193 | } | |
194 | ||
195 | static int c_enable(struct conn *c, | |
196 | char attribute((unused)) **vec, | |
197 | int attribute((unused)) nvec) { | |
198 | enable_playing(c->who, c->ev); | |
199 | /* Enable implicitly unpauses if there is nothing playing */ | |
200 | if(paused && !playing) resume_playing(c->who); | |
201 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
202 | return 1; /* completed */ | |
203 | } | |
204 | ||
205 | static int c_enabled(struct conn *c, | |
206 | char attribute((unused)) **vec, | |
207 | int attribute((unused)) nvec) { | |
208 | sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[playing_is_enabled()]); | |
209 | return 1; /* completed */ | |
210 | } | |
211 | ||
212 | static int c_play(struct conn *c, char **vec, | |
213 | int attribute((unused)) nvec) { | |
214 | const char *track; | |
215 | struct queue_entry *q; | |
216 | ||
217 | if(!trackdb_exists(vec[0])) { | |
218 | sink_writes(ev_writer_sink(c->w), "550 track is not in database\n"); | |
219 | return 1; | |
220 | } | |
221 | if(!(track = trackdb_resolve(vec[0]))) { | |
222 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
223 | return 1; | |
224 | } | |
225 | q = queue_add(track, c->who, WHERE_BEFORE_RANDOM); | |
226 | queue_write(); | |
227 | /* If we added the first track, and something is playing, then prepare the | |
228 | * new track. If nothing is playing then we don't bother as it wouldn't gain | |
229 | * anything. */ | |
230 | if(q == qhead.next && playing) | |
231 | prepare(c->ev, q); | |
81e440ce | 232 | sink_printf(ev_writer_sink(c->w), "252 %s\n", q->id); |
460b9539 | 233 | /* If the queue was empty but we are for some reason paused then |
234 | * unpause. */ | |
235 | if(!playing) resume_playing(0); | |
236 | play(c->ev); | |
237 | return 1; /* completed */ | |
238 | } | |
239 | ||
240 | static int c_remove(struct conn *c, char **vec, | |
241 | int attribute((unused)) nvec) { | |
242 | struct queue_entry *q; | |
243 | ||
244 | if(!(q = queue_find(vec[0]))) { | |
245 | sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n"); | |
246 | return 1; | |
247 | } | |
248 | if(config->restrictions & RESTRICT_REMOVE) { | |
249 | /* can only remove tracks that you submitted */ | |
250 | if(!q->submitter || strcmp(q->submitter, c->who)) { | |
251 | sink_writes(ev_writer_sink(c->w), "550 you didn't submit that track!\n"); | |
252 | return 1; | |
253 | } | |
254 | } | |
255 | queue_remove(q, c->who); | |
256 | /* De-prepare the track. */ | |
257 | abandon(c->ev, q); | |
258 | /* If we removed the random track then add another one. */ | |
259 | if(q->state == playing_random) | |
260 | add_random_track(); | |
261 | /* Prepare whatever the next head track is. */ | |
262 | if(qhead.next != &qhead) | |
263 | prepare(c->ev, qhead.next); | |
264 | queue_write(); | |
265 | sink_writes(ev_writer_sink(c->w), "250 removed\n"); | |
266 | return 1; /* completed */ | |
267 | } | |
268 | ||
269 | static int c_scratch(struct conn *c, | |
270 | char **vec, | |
271 | int nvec) { | |
272 | if(!playing) { | |
273 | sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n"); | |
274 | return 1; /* completed */ | |
275 | } | |
276 | if(config->restrictions & RESTRICT_SCRATCH) { | |
277 | /* can only scratch tracks you submitted and randomly selected ones */ | |
278 | if(playing->submitter && strcmp(playing->submitter, c->who)) { | |
279 | sink_writes(ev_writer_sink(c->w), "550 you didn't submit that track!\n"); | |
280 | return 1; | |
281 | } | |
282 | } | |
283 | scratch(c->who, nvec == 1 ? vec[0] : 0); | |
284 | /* If you scratch an unpaused track then it is automatically unpaused */ | |
285 | resume_playing(0); | |
286 | sink_writes(ev_writer_sink(c->w), "250 scratched\n"); | |
287 | return 1; /* completed */ | |
288 | } | |
289 | ||
290 | static int c_pause(struct conn *c, | |
291 | char attribute((unused)) **vec, | |
292 | int attribute((unused)) nvec) { | |
293 | if(!playing) { | |
294 | sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n"); | |
295 | return 1; /* completed */ | |
296 | } | |
297 | if(paused) { | |
298 | sink_writes(ev_writer_sink(c->w), "250 already paused\n"); | |
299 | return 1; /* completed */ | |
300 | } | |
301 | if(pause_playing(c->who) < 0) | |
302 | sink_writes(ev_writer_sink(c->w), "550 cannot pause this track\n"); | |
303 | else | |
304 | sink_writes(ev_writer_sink(c->w), "250 paused\n"); | |
305 | return 1; | |
306 | } | |
307 | ||
308 | static int c_resume(struct conn *c, | |
309 | char attribute((unused)) **vec, | |
310 | int attribute((unused)) nvec) { | |
311 | if(!paused) { | |
312 | sink_writes(ev_writer_sink(c->w), "250 not paused\n"); | |
313 | return 1; /* completed */ | |
314 | } | |
315 | resume_playing(c->who); | |
316 | sink_writes(ev_writer_sink(c->w), "250 paused\n"); | |
317 | return 1; | |
318 | } | |
319 | ||
320 | static int c_shutdown(struct conn *c, | |
321 | char attribute((unused)) **vec, | |
322 | int attribute((unused)) nvec) { | |
323 | info("S%x shut down by %s", c->tag, c->who); | |
324 | sink_writes(ev_writer_sink(c->w), "250 shutting down\n"); | |
325 | ev_writer_flush(c->w); | |
326 | quit(c->ev); | |
327 | } | |
328 | ||
329 | static int c_reconfigure(struct conn *c, | |
330 | char attribute((unused)) **vec, | |
331 | int attribute((unused)) nvec) { | |
332 | info("S%x reconfigure by %s", c->tag, c->who); | |
333 | if(reconfigure(c->ev, 1)) | |
334 | sink_writes(ev_writer_sink(c->w), "550 error reading new config\n"); | |
335 | else | |
336 | sink_writes(ev_writer_sink(c->w), "250 installed new config\n"); | |
337 | return 1; /* completed */ | |
338 | } | |
339 | ||
340 | static int c_rescan(struct conn *c, | |
341 | char attribute((unused)) **vec, | |
342 | int attribute((unused)) nvec) { | |
343 | info("S%x rescan by %s", c->tag, c->who); | |
344 | trackdb_rescan(c->ev); | |
345 | sink_writes(ev_writer_sink(c->w), "250 initiated rescan\n"); | |
346 | return 1; /* completed */ | |
347 | } | |
348 | ||
349 | static int c_version(struct conn *c, | |
350 | char attribute((unused)) **vec, | |
351 | int attribute((unused)) nvec) { | |
352 | /* VERSION had better only use the basic character set */ | |
a05e4467 | 353 | sink_printf(ev_writer_sink(c->w), "251 %s\n", disorder_short_version_string); |
460b9539 | 354 | return 1; /* completed */ |
355 | } | |
356 | ||
357 | static int c_playing(struct conn *c, | |
358 | char attribute((unused)) **vec, | |
359 | int attribute((unused)) nvec) { | |
360 | if(playing) { | |
361 | queue_fix_sofar(playing); | |
362 | playing->expected = 0; | |
363 | sink_printf(ev_writer_sink(c->w), "252 %s\n", queue_marshall(playing)); | |
364 | } else | |
365 | sink_printf(ev_writer_sink(c->w), "259 nothing playing\n"); | |
366 | return 1; /* completed */ | |
367 | } | |
368 | ||
369 | static int c_become(struct conn *c, | |
370 | char **vec, | |
371 | int attribute((unused)) nvec) { | |
372 | c->who = vec[0]; | |
373 | sink_writes(ev_writer_sink(c->w), "230 OK\n"); | |
374 | return 1; | |
375 | } | |
376 | ||
b12be54a | 377 | static const char *connection_host(struct conn *c) { |
460b9539 | 378 | union { |
379 | struct sockaddr sa; | |
380 | struct sockaddr_in in; | |
381 | struct sockaddr_in6 in6; | |
382 | } u; | |
383 | socklen_t l; | |
b12be54a | 384 | int n; |
460b9539 | 385 | char host[1024]; |
386 | ||
460b9539 | 387 | /* get connection data */ |
388 | l = sizeof u; | |
389 | if(getpeername(c->fd, &u.sa, &l) < 0) { | |
390 | error(errno, "S%x error calling getpeername", c->tag); | |
b12be54a | 391 | return 0; |
460b9539 | 392 | } |
393 | if(c->l->pf != PF_UNIX) { | |
394 | if((n = getnameinfo(&u.sa, l, | |
395 | host, sizeof host, 0, 0, NI_NUMERICHOST))) { | |
396 | error(0, "S%x error calling getnameinfo: %s", c->tag, gai_strerror(n)); | |
b12be54a | 397 | return 0; |
460b9539 | 398 | } |
b12be54a | 399 | return xstrdup(host); |
18e6d6e6 | 400 | } else |
b12be54a RK |
401 | return "local"; |
402 | } | |
403 | ||
404 | static int c_user(struct conn *c, | |
405 | char **vec, | |
406 | int attribute((unused)) nvec) { | |
f0feb22e | 407 | const char *res, *host, *password; |
b12be54a RK |
408 | |
409 | if(c->who) { | |
410 | sink_writes(ev_writer_sink(c->w), "530 already authenticated\n"); | |
411 | return 1; | |
412 | } | |
413 | /* get connection data */ | |
414 | if(!(host = connection_host(c))) { | |
415 | sink_writes(ev_writer_sink(c->w), "530 authentication failure\n"); | |
416 | return 1; | |
417 | } | |
460b9539 | 418 | /* find the user */ |
f0feb22e RK |
419 | password = trackdb_get_password(vec[0]); |
420 | /* reject nonexistent users */ | |
421 | if(!password) { | |
18e6d6e6 | 422 | info("S%x unknown user '%s' from %s", c->tag, vec[0], host); |
423 | sink_writes(ev_writer_sink(c->w), "530 authentication failed\n"); | |
424 | return 1; | |
425 | } | |
f0feb22e RK |
426 | /* check whether the response is right */ |
427 | res = authhash(c->nonce, sizeof c->nonce, password, | |
637fdea3 | 428 | config->authorization_algorithm); |
18e6d6e6 | 429 | if(wideopen || (res && !strcmp(res, vec[1]))) { |
430 | c->who = vec[0]; | |
431 | /* currently we only bother logging remote connections */ | |
b12be54a | 432 | if(strcmp(host, "local")) |
18e6d6e6 | 433 | info("S%x %s connected from %s", c->tag, vec[0], host); |
434 | sink_writes(ev_writer_sink(c->w), "230 OK\n"); | |
435 | return 1; | |
460b9539 | 436 | } |
437 | /* oops, response was wrong */ | |
18e6d6e6 | 438 | info("S%x authentication failure for %s from %s", c->tag, vec[0], host); |
460b9539 | 439 | sink_writes(ev_writer_sink(c->w), "530 authentication failed\n"); |
440 | return 1; | |
441 | } | |
442 | ||
443 | static int c_recent(struct conn *c, | |
444 | char attribute((unused)) **vec, | |
445 | int attribute((unused)) nvec) { | |
446 | const struct queue_entry *q; | |
447 | ||
448 | sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n"); | |
449 | for(q = phead.next; q != &phead; q = q->next) | |
450 | sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q)); | |
451 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
452 | return 1; /* completed */ | |
453 | } | |
454 | ||
455 | static int c_queue(struct conn *c, | |
456 | char attribute((unused)) **vec, | |
457 | int attribute((unused)) nvec) { | |
458 | struct queue_entry *q; | |
459 | time_t when = 0; | |
460 | const char *l; | |
461 | long length; | |
462 | ||
463 | sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n"); | |
464 | if(playing_is_enabled() && !paused) { | |
465 | if(playing) { | |
466 | queue_fix_sofar(playing); | |
467 | if((l = trackdb_get(playing->track, "_length")) | |
468 | && (length = atol(l))) { | |
469 | time(&when); | |
470 | when += length - playing->sofar + config->gap; | |
471 | } | |
472 | } else | |
473 | /* Nothing is playing but playing is enabled, so whatever is | |
474 | * first in the queue can be expected to start immediately. */ | |
475 | time(&when); | |
476 | } | |
477 | for(q = qhead.next; q != &qhead; q = q->next) { | |
478 | /* fill in estimated start time */ | |
479 | q->expected = when; | |
480 | sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q)); | |
481 | /* update for next track */ | |
482 | if(when) { | |
483 | if((l = trackdb_get(q->track, "_length")) | |
484 | && (length = atol(l))) | |
485 | when += length + config->gap; | |
486 | else | |
487 | when = 0; | |
488 | } | |
489 | } | |
490 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
491 | return 1; /* completed */ | |
492 | } | |
493 | ||
494 | static int output_list(struct conn *c, char **vec) { | |
495 | while(*vec) | |
496 | sink_printf(ev_writer_sink(c->w), "%s\n", *vec++); | |
497 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
498 | return 1; | |
499 | } | |
500 | ||
501 | static int files_dirs(struct conn *c, | |
502 | char **vec, | |
503 | int nvec, | |
504 | enum trackdb_listable what) { | |
505 | const char *dir, *re, *errstr; | |
506 | int erroffset; | |
507 | pcre *rec; | |
508 | char **fvec, *key; | |
509 | ||
510 | switch(nvec) { | |
511 | case 0: dir = 0; re = 0; break; | |
512 | case 1: dir = vec[0]; re = 0; break; | |
513 | case 2: dir = vec[0]; re = vec[1]; break; | |
514 | default: abort(); | |
515 | } | |
516 | /* A bit of a bodge to make sure the args don't trample on cache keys */ | |
517 | if(dir && strchr(dir, '\n')) { | |
518 | sink_writes(ev_writer_sink(c->w), "550 invalid directory name\n"); | |
519 | return 1; | |
520 | } | |
521 | if(re && strchr(re, '\n')) { | |
522 | sink_writes(ev_writer_sink(c->w), "550 invalid regexp\n"); | |
523 | return 1; | |
524 | } | |
525 | /* We bother eliminating "" because the web interface is relatively | |
526 | * likely to send it */ | |
527 | if(re && *re) { | |
528 | byte_xasprintf(&key, "%d\n%s\n%s", (int)what, dir ? dir : "", re); | |
529 | fvec = (char **)cache_get(&cache_files_type, key); | |
530 | if(fvec) { | |
531 | /* Got a cache hit, don't store the answer in the cache */ | |
532 | key = 0; | |
533 | ++cache_files_hits; | |
534 | rec = 0; /* quieten compiler */ | |
535 | } else { | |
536 | /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer | |
537 | * in the cache. */ | |
538 | if(!(rec = pcre_compile(re, PCRE_CASELESS|PCRE_UTF8, | |
539 | &errstr, &erroffset, 0))) { | |
540 | sink_printf(ev_writer_sink(c->w), "550 Error compiling regexp: %s\n", | |
541 | errstr); | |
542 | return 1; | |
543 | } | |
544 | /* It only counts as a miss if the regexp was valid. */ | |
545 | ++cache_files_misses; | |
546 | } | |
547 | } else { | |
548 | /* No regexp, don't bother caching the result */ | |
549 | rec = 0; | |
550 | key = 0; | |
551 | fvec = 0; | |
552 | } | |
553 | if(!fvec) { | |
554 | /* No cache hit (either because a miss, or because we did not look) so do | |
555 | * the lookup */ | |
556 | if(dir && *dir) | |
557 | fvec = trackdb_list(dir, 0, what, rec); | |
558 | else | |
559 | fvec = trackdb_list(0, 0, what, rec); | |
560 | } | |
561 | if(key) | |
562 | /* Put the answer in the cache */ | |
563 | cache_put(&cache_files_type, key, fvec); | |
564 | sink_writes(ev_writer_sink(c->w), "253 Listing follow\n"); | |
565 | return output_list(c, fvec); | |
566 | } | |
567 | ||
568 | static int c_files(struct conn *c, | |
569 | char **vec, | |
570 | int nvec) { | |
571 | return files_dirs(c, vec, nvec, trackdb_files); | |
572 | } | |
573 | ||
574 | static int c_dirs(struct conn *c, | |
575 | char **vec, | |
576 | int nvec) { | |
577 | return files_dirs(c, vec, nvec, trackdb_directories); | |
578 | } | |
579 | ||
580 | static int c_allfiles(struct conn *c, | |
581 | char **vec, | |
582 | int nvec) { | |
583 | return files_dirs(c, vec, nvec, trackdb_directories|trackdb_files); | |
584 | } | |
585 | ||
586 | static int c_get(struct conn *c, | |
587 | char **vec, | |
588 | int attribute((unused)) nvec) { | |
589 | const char *v; | |
590 | ||
591 | if(vec[1][0] != '_' && (v = trackdb_get(vec[0], vec[1]))) | |
592 | sink_printf(ev_writer_sink(c->w), "252 %s\n", v); | |
593 | else | |
fb1bc1f5 | 594 | sink_writes(ev_writer_sink(c->w), "555 not found\n"); |
460b9539 | 595 | return 1; |
596 | } | |
597 | ||
598 | static int c_length(struct conn *c, | |
599 | char **vec, | |
600 | int attribute((unused)) nvec) { | |
601 | const char *track, *v; | |
602 | ||
603 | if(!(track = trackdb_resolve(vec[0]))) { | |
604 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
605 | return 1; | |
606 | } | |
607 | if((v = trackdb_get(track, "_length"))) | |
608 | sink_printf(ev_writer_sink(c->w), "252 %s\n", v); | |
609 | else | |
610 | sink_writes(ev_writer_sink(c->w), "550 not found\n"); | |
611 | return 1; | |
612 | } | |
613 | ||
614 | static int c_set(struct conn *c, | |
615 | char **vec, | |
616 | int attribute((unused)) nvec) { | |
617 | if(vec[1][0] != '_' && !trackdb_set(vec[0], vec[1], vec[2])) | |
618 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
619 | else | |
620 | sink_writes(ev_writer_sink(c->w), "550 not found\n"); | |
621 | return 1; | |
622 | } | |
623 | ||
624 | static int c_prefs(struct conn *c, | |
625 | char **vec, | |
626 | int attribute((unused)) nvec) { | |
627 | struct kvp *k; | |
628 | ||
629 | k = trackdb_get_all(vec[0]); | |
630 | sink_writes(ev_writer_sink(c->w), "253 prefs follow\n"); | |
631 | for(; k; k = k->next) | |
632 | if(k->name[0] != '_') /* omit internal values */ | |
633 | sink_printf(ev_writer_sink(c->w), | |
634 | " %s %s\n", quoteutf8(k->name), quoteutf8(k->value)); | |
635 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
636 | return 1; | |
637 | } | |
638 | ||
639 | static int c_exists(struct conn *c, | |
640 | char **vec, | |
641 | int attribute((unused)) nvec) { | |
642 | sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]); | |
643 | return 1; | |
644 | } | |
645 | ||
646 | static void search_parse_error(const char *msg, void *u) { | |
647 | *(const char **)u = msg; | |
648 | } | |
649 | ||
650 | static int c_search(struct conn *c, | |
651 | char **vec, | |
652 | int attribute((unused)) nvec) { | |
653 | char **terms, **results; | |
654 | int nterms, nresults, n; | |
655 | const char *e = "unknown error"; | |
656 | ||
657 | /* This is a bit of a bodge. Initially it's there to make the eclient | |
658 | * interface a bit more convenient to add searching to, but it has the more | |
659 | * compelling advantage that if everything uses it, then interpretation of | |
660 | * user-supplied search strings will be the same everywhere. */ | |
661 | if(!(terms = split(vec[0], &nterms, SPLIT_QUOTES, search_parse_error, &e))) { | |
662 | sink_printf(ev_writer_sink(c->w), "550 %s\n", e); | |
663 | } else { | |
664 | results = trackdb_search(terms, nterms, &nresults); | |
665 | sink_printf(ev_writer_sink(c->w), "253 %d matches\n", nresults); | |
666 | for(n = 0; n < nresults; ++n) | |
667 | sink_printf(ev_writer_sink(c->w), "%s\n", results[n]); | |
668 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
669 | } | |
670 | return 1; | |
671 | } | |
672 | ||
673 | static int c_random_enable(struct conn *c, | |
674 | char attribute((unused)) **vec, | |
675 | int attribute((unused)) nvec) { | |
676 | enable_random(c->who, c->ev); | |
677 | /* Enable implicitly unpauses if there is nothing playing */ | |
678 | if(paused && !playing) resume_playing(c->who); | |
679 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
680 | return 1; /* completed */ | |
681 | } | |
682 | ||
683 | static int c_random_disable(struct conn *c, | |
684 | char attribute((unused)) **vec, | |
685 | int attribute((unused)) nvec) { | |
686 | disable_random(c->who); | |
687 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
688 | return 1; /* completed */ | |
689 | } | |
690 | ||
691 | static int c_random_enabled(struct conn *c, | |
692 | char attribute((unused)) **vec, | |
693 | int attribute((unused)) nvec) { | |
694 | sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[random_is_enabled()]); | |
695 | return 1; /* completed */ | |
696 | } | |
697 | ||
d6dde5a3 RK |
698 | static void got_stats(char *stats, void *u) { |
699 | struct conn *const c = u; | |
700 | ||
701 | sink_printf(ev_writer_sink(c->w), "253 stats\n%s\n.\n", stats); | |
702 | /* Now we can start processing commands again */ | |
703 | ev_reader_enable(c->r); | |
704 | } | |
705 | ||
460b9539 | 706 | static int c_stats(struct conn *c, |
707 | char attribute((unused)) **vec, | |
708 | int attribute((unused)) nvec) { | |
d6dde5a3 RK |
709 | trackdb_stats_subprocess(c->ev, got_stats, c); |
710 | return 0; /* not yet complete */ | |
460b9539 | 711 | } |
712 | ||
713 | static int c_volume(struct conn *c, | |
714 | char **vec, | |
715 | int nvec) { | |
716 | int l, r, set; | |
717 | char lb[32], rb[32]; | |
718 | ||
719 | switch(nvec) { | |
720 | case 0: | |
721 | set = 0; | |
722 | break; | |
723 | case 1: | |
724 | l = r = atoi(vec[0]); | |
725 | set = 1; | |
726 | break; | |
727 | case 2: | |
728 | l = atoi(vec[0]); | |
729 | r = atoi(vec[1]); | |
730 | set = 1; | |
731 | break; | |
732 | default: | |
733 | abort(); | |
734 | } | |
735 | if(mixer_control(&l, &r, set)) | |
736 | sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n"); | |
737 | else { | |
738 | sink_printf(ev_writer_sink(c->w), "252 %d %d\n", l, r); | |
739 | if(l != volume_left || r != volume_right) { | |
740 | volume_left = l; | |
741 | volume_right = r; | |
742 | snprintf(lb, sizeof lb, "%d", l); | |
743 | snprintf(rb, sizeof rb, "%d", r); | |
744 | eventlog("volume", lb, rb, (char *)0); | |
745 | } | |
746 | } | |
747 | return 1; | |
748 | } | |
749 | ||
397ef7bb RK |
750 | /** @brief Called when data arrives on a log connection |
751 | * | |
752 | * We just discard all such data. The client may occasionally send data as a | |
753 | * keepalive. | |
754 | */ | |
755 | static int logging_reader_callback(ev_source attribute((unused)) *ev, | |
460b9539 | 756 | ev_reader *reader, |
397ef7bb | 757 | void attribute((unused)) *ptr, |
460b9539 | 758 | size_t bytes, |
397ef7bb RK |
759 | int attribute((unused)) eof, |
760 | void attribute((unused)) *u) { | |
460b9539 | 761 | struct conn *c = u; |
762 | ||
397ef7bb RK |
763 | ev_reader_consume(reader, bytes); |
764 | if(eof) { | |
765 | /* Oops, that's all for now */ | |
8d8b8c1f | 766 | D(("logging reader eof")); |
397ef7bb | 767 | if(c->w) { |
8d8b8c1f | 768 | D(("close writer")); |
397ef7bb RK |
769 | ev_writer_close(c->w); |
770 | c->w = 0; | |
771 | } | |
772 | c->r = 0; | |
f6033c46 | 773 | } |
397ef7bb | 774 | return 0; |
460b9539 | 775 | } |
776 | ||
777 | static void logclient(const char *msg, void *user) { | |
778 | struct conn *c = user; | |
779 | ||
f6033c46 RK |
780 | if(!c->w || !c->r) { |
781 | /* This connection has gone up in smoke for some reason */ | |
782 | eventlog_remove(c->lo); | |
783 | return; | |
784 | } | |
460b9539 | 785 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" %s\n", |
786 | (uintmax_t)time(0), msg); | |
787 | } | |
788 | ||
789 | static int c_log(struct conn *c, | |
790 | char attribute((unused)) **vec, | |
791 | int attribute((unused)) nvec) { | |
792 | time_t now; | |
793 | ||
794 | sink_writes(ev_writer_sink(c->w), "254 OK\n"); | |
795 | /* pump out initial state */ | |
796 | time(&now); | |
797 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n", | |
798 | (uintmax_t)now, | |
799 | playing_is_enabled() ? "enable_play" : "disable_play"); | |
800 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n", | |
801 | (uintmax_t)now, | |
802 | random_is_enabled() ? "enable_random" : "disable_random"); | |
803 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n", | |
804 | (uintmax_t)now, | |
805 | paused ? "pause" : "resume"); | |
5abe307a RK |
806 | if(playing) |
807 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state playing\n", | |
808 | (uintmax_t)now); | |
df44d69b RK |
809 | /* Initial volume */ |
810 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" volume %d %d\n", | |
811 | (uintmax_t)now, volume_left, volume_right); | |
460b9539 | 812 | c->lo = xmalloc(sizeof *c->lo); |
813 | c->lo->fn = logclient; | |
814 | c->lo->user = c; | |
815 | eventlog_add(c->lo); | |
816 | c->reader = logging_reader_callback; | |
817 | return 0; | |
818 | } | |
819 | ||
460b9539 | 820 | static int c_move(struct conn *c, |
821 | char **vec, | |
822 | int attribute((unused)) nvec) { | |
823 | struct queue_entry *q; | |
824 | int n; | |
825 | ||
826 | if(config->restrictions & RESTRICT_MOVE) { | |
827 | if(!trusted(c)) { | |
828 | sink_writes(ev_writer_sink(c->w), | |
829 | "550 only trusted users can move tracks\n"); | |
830 | return 1; | |
831 | } | |
832 | } | |
833 | if(!(q = queue_find(vec[0]))) { | |
834 | sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n"); | |
835 | return 1; | |
836 | } | |
837 | n = queue_move(q, atoi(vec[1]), c->who); | |
460b9539 | 838 | sink_printf(ev_writer_sink(c->w), "252 %d\n", n); |
839 | /* If we've moved to the head of the queue then prepare the track. */ | |
840 | if(q == qhead.next) | |
841 | prepare(c->ev, q); | |
842 | return 1; | |
843 | } | |
844 | ||
845 | static int c_moveafter(struct conn *c, | |
846 | char **vec, | |
847 | int attribute((unused)) nvec) { | |
848 | struct queue_entry *q, **qs; | |
849 | int n; | |
850 | ||
851 | if(config->restrictions & RESTRICT_MOVE) { | |
852 | if(!trusted(c)) { | |
853 | sink_writes(ev_writer_sink(c->w), | |
854 | "550 only trusted users can move tracks\n"); | |
855 | return 1; | |
856 | } | |
857 | } | |
858 | if(vec[0][0]) { | |
859 | if(!(q = queue_find(vec[0]))) { | |
860 | sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n"); | |
861 | return 1; | |
862 | } | |
863 | } else | |
864 | q = 0; | |
865 | ++vec; | |
866 | --nvec; | |
867 | qs = xcalloc(nvec, sizeof *qs); | |
868 | for(n = 0; n < nvec; ++n) | |
869 | if(!(qs[n] = queue_find(vec[n]))) { | |
870 | sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n"); | |
871 | return 1; | |
872 | } | |
873 | queue_moveafter(q, nvec, qs, c->who); | |
460b9539 | 874 | sink_printf(ev_writer_sink(c->w), "250 Moved tracks\n"); |
875 | /* If we've moved to the head of the queue then prepare the track. */ | |
876 | if(q == qhead.next) | |
877 | prepare(c->ev, q); | |
878 | return 1; | |
879 | } | |
880 | ||
881 | static int c_part(struct conn *c, | |
882 | char **vec, | |
883 | int attribute((unused)) nvec) { | |
884 | sink_printf(ev_writer_sink(c->w), "252 %s\n", | |
885 | trackdb_getpart(vec[0], vec[1], vec[2])); | |
886 | return 1; | |
887 | } | |
888 | ||
889 | static int c_resolve(struct conn *c, | |
890 | char **vec, | |
891 | int attribute((unused)) nvec) { | |
892 | const char *track; | |
893 | ||
894 | if(!(track = trackdb_resolve(vec[0]))) { | |
895 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
896 | return 1; | |
897 | } | |
898 | sink_printf(ev_writer_sink(c->w), "252 %s\n", track); | |
899 | return 1; | |
900 | } | |
901 | ||
902 | static int c_tags(struct conn *c, | |
903 | char attribute((unused)) **vec, | |
904 | int attribute((unused)) nvec) { | |
905 | char **tags = trackdb_alltags(); | |
906 | ||
907 | sink_printf(ev_writer_sink(c->w), "253 Tag list follows\n"); | |
908 | while(*tags) { | |
909 | sink_printf(ev_writer_sink(c->w), "%s%s\n", | |
910 | **tags == '.' ? "." : "", *tags); | |
911 | ++tags; | |
912 | } | |
913 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
914 | return 1; /* completed */ | |
460b9539 | 915 | } |
916 | ||
917 | static int c_set_global(struct conn *c, | |
918 | char **vec, | |
919 | int attribute((unused)) nvec) { | |
f9635e06 RK |
920 | if(vec[0][0] == '_') { |
921 | sink_writes(ev_writer_sink(c->w), "550 cannot set internal global preferences\n"); | |
922 | return 1; | |
923 | } | |
460b9539 | 924 | trackdb_set_global(vec[0], vec[1], c->who); |
925 | sink_printf(ev_writer_sink(c->w), "250 OK\n"); | |
926 | return 1; | |
927 | } | |
928 | ||
929 | static int c_get_global(struct conn *c, | |
930 | char **vec, | |
931 | int attribute((unused)) nvec) { | |
932 | const char *s = trackdb_get_global(vec[0]); | |
933 | ||
934 | if(s) | |
935 | sink_printf(ev_writer_sink(c->w), "252 %s\n", s); | |
936 | else | |
fb1bc1f5 | 937 | sink_writes(ev_writer_sink(c->w), "555 not found\n"); |
460b9539 | 938 | return 1; |
939 | } | |
940 | ||
7858930d | 941 | static int c_nop(struct conn *c, |
942 | char attribute((unused)) **vec, | |
943 | int attribute((unused)) nvec) { | |
944 | sink_printf(ev_writer_sink(c->w), "250 Quack\n"); | |
945 | return 1; | |
946 | } | |
947 | ||
2a10b70b RK |
948 | static int c_new(struct conn *c, |
949 | char **vec, | |
950 | int nvec) { | |
951 | char **tracks = trackdb_new(0, nvec > 0 ? atoi(vec[0]) : INT_MAX); | |
952 | ||
953 | sink_printf(ev_writer_sink(c->w), "253 New track list follows\n"); | |
954 | while(*tracks) { | |
955 | sink_printf(ev_writer_sink(c->w), "%s%s\n", | |
956 | **tracks == '.' ? "." : "", *tracks); | |
957 | ++tracks; | |
958 | } | |
959 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
960 | return 1; /* completed */ | |
961 | ||
962 | } | |
963 | ||
ca831831 RK |
964 | static int c_rtp_address(struct conn *c, |
965 | char attribute((unused)) **vec, | |
966 | int attribute((unused)) nvec) { | |
967 | if(config->speaker_backend == BACKEND_NETWORK) { | |
968 | sink_printf(ev_writer_sink(c->w), "252 %s %s\n", | |
969 | quoteutf8(config->broadcast.s[0]), | |
970 | quoteutf8(config->broadcast.s[1])); | |
971 | } else | |
972 | sink_writes(ev_writer_sink(c->w), "550 No RTP\n"); | |
973 | return 1; | |
974 | } | |
b12be54a RK |
975 | |
976 | static int c_cookie(struct conn *c, | |
977 | char **vec, | |
978 | int attribute((unused)) nvec) { | |
979 | const char *host; | |
980 | char *user; | |
981 | ||
982 | /* Can't log in twice on the same connection */ | |
983 | if(c->who) { | |
984 | sink_writes(ev_writer_sink(c->w), "530 already authenticated\n"); | |
985 | return 1; | |
986 | } | |
987 | /* Get some kind of peer identifcation */ | |
988 | if(!(host = connection_host(c))) { | |
989 | sink_writes(ev_writer_sink(c->w), "530 authentication failure\n"); | |
990 | return 1; | |
991 | } | |
992 | /* Check the cookie */ | |
993 | user = verify_cookie(vec[0]); | |
994 | if(!user) { | |
995 | sink_writes(ev_writer_sink(c->w), "530 authentication failure\n"); | |
996 | return 1; | |
997 | } | |
998 | /* Log in */ | |
999 | c->who = user; | |
1000 | c->cookie = vec[0]; | |
1001 | if(strcmp(host, "local")) | |
1002 | info("S%x %s connected with cookie from %s", c->tag, user, host); | |
1003 | sink_writes(ev_writer_sink(c->w), "230 OK\n"); | |
1004 | return 1; | |
1005 | } | |
1006 | ||
1007 | static int c_make_cookie(struct conn *c, | |
1008 | char attribute((unused)) **vec, | |
1009 | int attribute((unused)) nvec) { | |
1010 | const char *cookie = make_cookie(c->who); | |
1011 | ||
1012 | if(cookie) | |
1013 | sink_printf(ev_writer_sink(c->w), "252 %s\n", cookie); | |
1014 | else | |
1015 | sink_writes(ev_writer_sink(c->w), "550 Cannot create cookie\n"); | |
1016 | return 1; | |
1017 | } | |
1018 | ||
1019 | static int c_revoke(struct conn *c, | |
1020 | char attribute((unused)) **vec, | |
1021 | int attribute((unused)) nvec) { | |
1022 | if(c->cookie) { | |
1023 | revoke_cookie(c->cookie); | |
1024 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
1025 | } else | |
1026 | sink_writes(ev_writer_sink(c->w), "550 Did not log in with cookie\n"); | |
1027 | return 1; | |
1028 | } | |
1029 | ||
f0feb22e RK |
1030 | static int c_adduser(struct conn *c, |
1031 | char **vec, | |
1032 | int attribute((unused)) nvec) { | |
1033 | /* TODO local only */ | |
1034 | if(trackdb_adduser(vec[0], vec[1], default_rights(), 0)) | |
1035 | sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n"); | |
1036 | else | |
1037 | sink_writes(ev_writer_sink(c->w), "250 User created\n"); | |
1038 | return 1; | |
1039 | } | |
1040 | ||
1041 | static int c_deluser(struct conn *c, | |
1042 | char **vec, | |
1043 | int attribute((unused)) nvec) { | |
1044 | /* TODO local only */ | |
1045 | if(trackdb_deluser(vec[0])) | |
1046 | sink_writes(ev_writer_sink(c->w), "550 Cannot deleted user\n"); | |
1047 | else | |
1048 | sink_writes(ev_writer_sink(c->w), "250 User deleted\n"); | |
1049 | return 1; | |
1050 | } | |
1051 | ||
1052 | static int c_edituser(struct conn *c, | |
5df73aeb | 1053 | char **vec, |
f0feb22e | 1054 | int attribute((unused)) nvec) { |
5df73aeb RK |
1055 | /* TODO local only */ |
1056 | if(trusted(c) | |
1057 | || (!strcmp(c->who, vec[0]) | |
1058 | && (!strcmp(vec[1], "email") | |
1059 | || !strcmp(vec[1], "password")))) { | |
1060 | if(trackdb_edituserinfo(vec[0], vec[1], vec[2])) | |
1061 | sink_writes(ev_writer_sink(c->w), "550 Failed to change setting\n"); | |
1062 | else | |
1063 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
1064 | } else | |
1065 | sink_writes(ev_writer_sink(c->w), "550 Restricted to administrators\n"); | |
f0feb22e RK |
1066 | return 1; |
1067 | } | |
1068 | ||
1069 | static int c_userinfo(struct conn *c, | |
1070 | char attribute((unused)) **vec, | |
1071 | int attribute((unused)) nvec) { | |
5df73aeb RK |
1072 | struct kvp *k; |
1073 | const char *value; | |
1074 | ||
1075 | /* TODO local only */ | |
1076 | if(trusted(c) | |
1077 | || (!strcmp(c->who, vec[0]) | |
1078 | && (!strcmp(vec[1], "email") | |
1079 | || !strcmp(vec[1], "rights")))) { | |
1080 | if((k = trackdb_getuserinfo(vec[0]))) | |
1081 | if((value = kvp_get(k, vec[1]))) | |
1082 | sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(value)); | |
1083 | else | |
1084 | sink_writes(ev_writer_sink(c->w), "555 Not set\n"); | |
1085 | else | |
1086 | sink_writes(ev_writer_sink(c->w), "550 No such user\n"); | |
1087 | } else | |
1088 | sink_writes(ev_writer_sink(c->w), "550 Restricted to administrators\n"); | |
f0feb22e RK |
1089 | return 1; |
1090 | } | |
1091 | ||
c3be4f19 RK |
1092 | static int c_users(struct conn *c, |
1093 | char attribute((unused)) **vec, | |
1094 | int attribute((unused)) nvec) { | |
1095 | /* TODO de-dupe with c_tags */ | |
1096 | char **users = trackdb_listusers(); | |
1097 | ||
1098 | sink_writes(ev_writer_sink(c->w), "253 User list follows\n"); | |
1099 | while(*users) { | |
1100 | sink_printf(ev_writer_sink(c->w), "%s%s\n", | |
1101 | **users == '.' ? "." : "", *users); | |
1102 | ++users; | |
1103 | } | |
1104 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
1105 | return 1; /* completed */ | |
1106 | } | |
1107 | ||
460b9539 | 1108 | #define C_AUTH 0001 /* must be authenticated */ |
1109 | #define C_TRUSTED 0002 /* must be trusted user */ | |
1110 | ||
1111 | static const struct command { | |
1112 | const char *name; | |
1113 | int minargs, maxargs; | |
1114 | int (*fn)(struct conn *, char **, int); | |
1115 | unsigned flags; | |
1116 | } commands[] = { | |
f0feb22e | 1117 | { "adduser", 2, 2, c_adduser, C_AUTH|C_TRUSTED }, |
460b9539 | 1118 | { "allfiles", 0, 2, c_allfiles, C_AUTH }, |
1119 | { "become", 1, 1, c_become, C_AUTH|C_TRUSTED }, | |
b12be54a | 1120 | { "cookie", 1, 1, c_cookie, 0 }, |
f0feb22e | 1121 | { "deluser", 1, 1, c_deluser, C_AUTH|C_TRUSTED }, |
460b9539 | 1122 | { "dirs", 0, 2, c_dirs, C_AUTH }, |
1123 | { "disable", 0, 1, c_disable, C_AUTH }, | |
f0feb22e | 1124 | { "edituser", 3, 3, c_edituser, C_AUTH }, |
460b9539 | 1125 | { "enable", 0, 0, c_enable, C_AUTH }, |
1126 | { "enabled", 0, 0, c_enabled, C_AUTH }, | |
1127 | { "exists", 1, 1, c_exists, C_AUTH }, | |
1128 | { "files", 0, 2, c_files, C_AUTH }, | |
1129 | { "get", 2, 2, c_get, C_AUTH }, | |
1130 | { "get-global", 1, 1, c_get_global, C_AUTH }, | |
1131 | { "length", 1, 1, c_length, C_AUTH }, | |
1132 | { "log", 0, 0, c_log, C_AUTH }, | |
b12be54a | 1133 | { "make-cookie", 0, 0, c_make_cookie, C_AUTH }, |
460b9539 | 1134 | { "move", 2, 2, c_move, C_AUTH }, |
1135 | { "moveafter", 1, INT_MAX, c_moveafter, C_AUTH }, | |
2a10b70b | 1136 | { "new", 0, 1, c_new, C_AUTH }, |
7858930d | 1137 | { "nop", 0, 0, c_nop, C_AUTH }, |
460b9539 | 1138 | { "part", 3, 3, c_part, C_AUTH }, |
1139 | { "pause", 0, 0, c_pause, C_AUTH }, | |
1140 | { "play", 1, 1, c_play, C_AUTH }, | |
1141 | { "playing", 0, 0, c_playing, C_AUTH }, | |
1142 | { "prefs", 1, 1, c_prefs, C_AUTH }, | |
1143 | { "queue", 0, 0, c_queue, C_AUTH }, | |
1144 | { "random-disable", 0, 0, c_random_disable, C_AUTH }, | |
1145 | { "random-enable", 0, 0, c_random_enable, C_AUTH }, | |
1146 | { "random-enabled", 0, 0, c_random_enabled, C_AUTH }, | |
1147 | { "recent", 0, 0, c_recent, C_AUTH }, | |
1148 | { "reconfigure", 0, 0, c_reconfigure, C_AUTH|C_TRUSTED }, | |
1149 | { "remove", 1, 1, c_remove, C_AUTH }, | |
1150 | { "rescan", 0, 0, c_rescan, C_AUTH|C_TRUSTED }, | |
1151 | { "resolve", 1, 1, c_resolve, C_AUTH }, | |
1152 | { "resume", 0, 0, c_resume, C_AUTH }, | |
b12be54a | 1153 | { "revoke", 0, 0, c_revoke, C_AUTH }, |
ca831831 | 1154 | { "rtp-address", 0, 0, c_rtp_address, C_AUTH }, |
460b9539 | 1155 | { "scratch", 0, 1, c_scratch, C_AUTH }, |
1156 | { "search", 1, 1, c_search, C_AUTH }, | |
1157 | { "set", 3, 3, c_set, C_AUTH, }, | |
1158 | { "set-global", 2, 2, c_set_global, C_AUTH }, | |
1159 | { "shutdown", 0, 0, c_shutdown, C_AUTH|C_TRUSTED }, | |
1160 | { "stats", 0, 0, c_stats, C_AUTH }, | |
1161 | { "tags", 0, 0, c_tags, C_AUTH }, | |
1162 | { "unset", 2, 2, c_set, C_AUTH }, | |
f0feb22e | 1163 | { "unset-global", 1, 1, c_set_global, C_AUTH }, |
460b9539 | 1164 | { "user", 2, 2, c_user, 0 }, |
f0feb22e | 1165 | { "userinfo", 2, 2, c_userinfo, C_AUTH }, |
c3be4f19 | 1166 | { "users", 0, 0, c_users, C_AUTH }, |
460b9539 | 1167 | { "version", 0, 0, c_version, C_AUTH }, |
1168 | { "volume", 0, 2, c_volume, C_AUTH } | |
1169 | }; | |
1170 | ||
1171 | static void command_error(const char *msg, void *u) { | |
1172 | struct conn *c = u; | |
1173 | ||
1174 | sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg); | |
1175 | } | |
1176 | ||
1177 | /* process a command. Return 1 if complete, 0 if incomplete. */ | |
1178 | static int command(struct conn *c, char *line) { | |
1179 | char **vec; | |
1180 | int nvec, n; | |
1181 | ||
1182 | D(("server command %s", line)); | |
f9635e06 RK |
1183 | /* We force everything into NFC as early as possible */ |
1184 | if(!(line = utf8_compose_canon(line, strlen(line), 0))) { | |
1185 | sink_writes(ev_writer_sink(c->w), "500 cannot normalize command\n"); | |
1186 | return 1; | |
1187 | } | |
460b9539 | 1188 | if(!(vec = split(line, &nvec, SPLIT_QUOTES, command_error, c))) { |
1189 | sink_writes(ev_writer_sink(c->w), "500 cannot parse command\n"); | |
1190 | return 1; | |
1191 | } | |
1192 | if(nvec == 0) { | |
1193 | sink_writes(ev_writer_sink(c->w), "500 do what?\n"); | |
1194 | return 1; | |
1195 | } | |
1196 | if((n = TABLE_FIND(commands, struct command, name, vec[0])) < 0) | |
1197 | sink_writes(ev_writer_sink(c->w), "500 unknown command\n"); | |
1198 | else { | |
1199 | if((commands[n].flags & C_AUTH) && !c->who) { | |
1200 | sink_writes(ev_writer_sink(c->w), "530 not authenticated\n"); | |
1201 | return 1; | |
1202 | } | |
1203 | if((commands[n].flags & C_TRUSTED) && !trusted(c)) { | |
1204 | sink_writes(ev_writer_sink(c->w), "530 insufficient privilege\n"); | |
1205 | return 1; | |
1206 | } | |
1207 | ++vec; | |
1208 | --nvec; | |
1209 | if(nvec < commands[n].minargs) { | |
1210 | sink_writes(ev_writer_sink(c->w), "500 missing argument(s)\n"); | |
1211 | return 1; | |
1212 | } | |
1213 | if(nvec > commands[n].maxargs) { | |
1214 | sink_writes(ev_writer_sink(c->w), "500 too many arguments\n"); | |
1215 | return 1; | |
1216 | } | |
1217 | return commands[n].fn(c, vec, nvec); | |
1218 | } | |
1219 | return 1; /* completed */ | |
1220 | } | |
1221 | ||
1222 | /* redirect to the right reader callback for our current state */ | |
1223 | static int redirect_reader_callback(ev_source *ev, | |
1224 | ev_reader *reader, | |
460b9539 | 1225 | void *ptr, |
1226 | size_t bytes, | |
1227 | int eof, | |
1228 | void *u) { | |
1229 | struct conn *c = u; | |
1230 | ||
75d64210 | 1231 | return c->reader(ev, reader, ptr, bytes, eof, u); |
460b9539 | 1232 | } |
1233 | ||
1234 | /* the main command reader */ | |
1235 | static int reader_callback(ev_source attribute((unused)) *ev, | |
1236 | ev_reader *reader, | |
460b9539 | 1237 | void *ptr, |
1238 | size_t bytes, | |
1239 | int eof, | |
1240 | void *u) { | |
1241 | struct conn *c = u; | |
1242 | char *eol; | |
1243 | int complete; | |
1244 | ||
1245 | D(("server reader_callback")); | |
1246 | while((eol = memchr(ptr, '\n', bytes))) { | |
1247 | *eol++ = 0; | |
1248 | ev_reader_consume(reader, eol - (char *)ptr); | |
1249 | complete = command(c, ptr); | |
1250 | bytes -= (eol - (char *)ptr); | |
1251 | ptr = eol; | |
1252 | if(!complete) { | |
1253 | /* the command had better have set a new reader callback */ | |
1254 | if(bytes || eof) | |
1255 | /* there are further bytes to read, or we are at eof; arrange for the | |
1256 | * command's reader callback to handle them */ | |
1257 | return ev_reader_incomplete(reader); | |
1258 | /* nothing's going on right now */ | |
1259 | return 0; | |
1260 | } | |
1261 | /* command completed, we can go around and handle the next one */ | |
1262 | } | |
1263 | if(eof) { | |
1264 | if(bytes) | |
1265 | error(0, "S%x unterminated line", c->tag); | |
8d8b8c1f | 1266 | D(("normal reader close")); |
397ef7bb RK |
1267 | c->r = 0; |
1268 | if(c->w) { | |
8d8b8c1f | 1269 | D(("close associated writer")); |
397ef7bb RK |
1270 | ev_writer_close(c->w); |
1271 | c->w = 0; | |
1272 | } | |
460b9539 | 1273 | } |
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | static int listen_callback(ev_source *ev, | |
1278 | int fd, | |
1279 | const struct sockaddr attribute((unused)) *remote, | |
1280 | socklen_t attribute((unused)) rlen, | |
1281 | void *u) { | |
1282 | const struct listener *l = u; | |
1283 | struct conn *c = xmalloc(sizeof *c); | |
1284 | static unsigned tags; | |
1285 | ||
1286 | D(("server listen_callback fd %d (%s)", fd, l->name)); | |
1287 | nonblock(fd); | |
1288 | cloexec(fd); | |
1289 | c->tag = tags++; | |
1290 | c->ev = ev; | |
e8c92ba7 RK |
1291 | c->w = ev_writer_new(ev, fd, writer_error, c, |
1292 | "client writer"); | |
1293 | c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c, | |
1294 | "client reader"); | |
75d64210 | 1295 | ev_tie(c->r, c->w); |
460b9539 | 1296 | c->fd = fd; |
1297 | c->reader = reader_callback; | |
1298 | c->l = l; | |
1299 | gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM); | |
637fdea3 RK |
1300 | if(!strcmp(config->authorization_algorithm, "sha1") |
1301 | || !strcmp(config->authorization_algorithm, "SHA1")) { | |
1302 | sink_printf(ev_writer_sink(c->w), "231 %s\n", | |
1303 | hex(c->nonce, sizeof c->nonce)); | |
1304 | } else { | |
1305 | sink_printf(ev_writer_sink(c->w), "231 %s %s\n", | |
1306 | config->authorization_algorithm, | |
1307 | hex(c->nonce, sizeof c->nonce)); | |
1308 | } | |
460b9539 | 1309 | return 0; |
1310 | } | |
1311 | ||
1312 | int server_start(ev_source *ev, int pf, | |
1313 | size_t socklen, const struct sockaddr *sa, | |
1314 | const char *name) { | |
1315 | int fd; | |
1316 | struct listener *l = xmalloc(sizeof *l); | |
1317 | static const int one = 1; | |
1318 | ||
1319 | D(("server_init socket %s", name)); | |
1320 | fd = xsocket(pf, SOCK_STREAM, 0); | |
1321 | xsetsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one); | |
1322 | if(bind(fd, sa, socklen) < 0) { | |
1323 | error(errno, "error binding to %s", name); | |
1324 | return -1; | |
1325 | } | |
1326 | xlisten(fd, 128); | |
1327 | nonblock(fd); | |
1328 | cloexec(fd); | |
1329 | l->name = name; | |
1330 | l->pf = pf; | |
e8c92ba7 RK |
1331 | if(ev_listen(ev, fd, listen_callback, l, "server listener")) |
1332 | exit(EXIT_FAILURE); | |
460b9539 | 1333 | return fd; |
1334 | } | |
1335 | ||
1336 | int server_stop(ev_source *ev, int fd) { | |
1337 | xclose(fd); | |
1338 | return ev_listen_cancel(ev, fd); | |
1339 | } | |
1340 | ||
1341 | /* | |
1342 | Local Variables: | |
1343 | c-basic-offset:2 | |
1344 | comment-column:40 | |
1345 | fill-column:79 | |
1346 | End: | |
1347 | */ |