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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
964e027d | 3 | * Copyright (C) 2004-2008 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" |
fce810c2 | 69 | #include "base64.h" |
6207d2f3 | 70 | #include "hash.h" |
71 | #include "mime.h" | |
72 | #include "sendmail.h" | |
73 | #include "wstat.h" | |
460b9539 | 74 | |
75 | #ifndef NONCE_SIZE | |
76 | # define NONCE_SIZE 16 | |
77 | #endif | |
78 | ||
10114017 | 79 | #ifndef CONFIRM_SIZE |
80 | # define CONFIRM_SIZE 10 | |
81 | #endif | |
82 | ||
460b9539 | 83 | int volume_left, volume_right; /* last known volume */ |
84 | ||
18e6d6e6 | 85 | /** @brief Accept all well-formed login attempts |
86 | * | |
87 | * Used in debugging. | |
88 | */ | |
89 | int wideopen; | |
90 | ||
460b9539 | 91 | struct listener { |
92 | const char *name; | |
93 | int pf; | |
94 | }; | |
95 | ||
397ef7bb | 96 | /** @brief One client connection */ |
460b9539 | 97 | struct conn { |
397ef7bb | 98 | /** @brief Read commands from here */ |
460b9539 | 99 | ev_reader *r; |
397ef7bb | 100 | /** @brief Send responses to here */ |
460b9539 | 101 | ev_writer *w; |
397ef7bb | 102 | /** @brief Underlying file descriptor */ |
460b9539 | 103 | int fd; |
397ef7bb | 104 | /** @brief Unique identifier for connection used in log messages */ |
460b9539 | 105 | unsigned tag; |
397ef7bb | 106 | /** @brief Login name or NULL */ |
460b9539 | 107 | char *who; |
397ef7bb | 108 | /** @brief Event loop */ |
460b9539 | 109 | ev_source *ev; |
397ef7bb | 110 | /** @brief Nonce chosen for this connection */ |
460b9539 | 111 | unsigned char nonce[NONCE_SIZE]; |
397ef7bb RK |
112 | /** @brief Current reader callback |
113 | * | |
114 | * We change this depending on whether we're servicing the @b log command | |
115 | */ | |
460b9539 | 116 | ev_reader_callback *reader; |
397ef7bb | 117 | /** @brief Event log output sending to this connection */ |
460b9539 | 118 | struct eventlog_output *lo; |
397ef7bb | 119 | /** @brief Parent listener */ |
460b9539 | 120 | const struct listener *l; |
b12be54a RK |
121 | /** @brief Login cookie or NULL */ |
122 | char *cookie; | |
eb5dc014 RK |
123 | /** @brief Connection rights */ |
124 | rights_type rights; | |
0126692c | 125 | /** @brief Next connection */ |
126 | struct conn *next; | |
dd9af5cb RK |
127 | /** @brief True if pending rescan had 'wait' set */ |
128 | int rescan_wait; | |
460b9539 | 129 | }; |
130 | ||
0126692c | 131 | /** @brief Linked list of connections */ |
132 | static struct conn *connections; | |
133 | ||
460b9539 | 134 | static int reader_callback(ev_source *ev, |
135 | ev_reader *reader, | |
460b9539 | 136 | void *ptr, |
137 | size_t bytes, | |
138 | int eof, | |
139 | void *u); | |
140 | ||
141 | static const char *noyes[] = { "no", "yes" }; | |
142 | ||
0126692c | 143 | /** @brief Remove a connection from the connection list */ |
144 | static void remove_connection(struct conn *c) { | |
145 | struct conn **cc; | |
146 | ||
147 | for(cc = &connections; *cc && *cc != c; cc = &(*cc)->next) | |
148 | ; | |
149 | if(*cc) | |
150 | *cc = c->next; | |
151 | } | |
152 | ||
397ef7bb RK |
153 | /** @brief Called when a connection's writer fails or is shut down |
154 | * | |
155 | * If the connection still has a raeder that is cancelled. | |
156 | */ | |
460b9539 | 157 | static int writer_error(ev_source attribute((unused)) *ev, |
460b9539 | 158 | int errno_value, |
159 | void *u) { | |
160 | struct conn *c = u; | |
161 | ||
8d8b8c1f | 162 | D(("server writer_error S%x %d", c->tag, errno_value)); |
460b9539 | 163 | if(errno_value == 0) { |
164 | /* writer is done */ | |
8d8b8c1f | 165 | D(("S%x writer completed", c->tag)); |
460b9539 | 166 | } else { |
167 | if(errno_value != EPIPE) | |
168 | error(errno_value, "S%x write error on socket", c->tag); | |
38b8221f | 169 | if(c->r) { |
8d8b8c1f | 170 | D(("cancel reader")); |
38b8221f RK |
171 | ev_reader_cancel(c->r); |
172 | c->r = 0; | |
173 | } | |
8d8b8c1f | 174 | D(("done cancel reader")); |
460b9539 | 175 | } |
38b8221f | 176 | c->w = 0; |
75d64210 | 177 | ev_report(ev); |
0126692c | 178 | remove_connection(c); |
460b9539 | 179 | return 0; |
180 | } | |
181 | ||
397ef7bb RK |
182 | /** @brief Called when a conncetion's reader fails or is shut down |
183 | * | |
184 | * If connection still has a writer then it is closed. | |
185 | */ | |
460b9539 | 186 | static int reader_error(ev_source attribute((unused)) *ev, |
460b9539 | 187 | int errno_value, |
188 | void *u) { | |
189 | struct conn *c = u; | |
190 | ||
8d8b8c1f | 191 | D(("server reader_error S%x %d", c->tag, errno_value)); |
1563f6f6 | 192 | error(errno_value, "S%x read error on socket", c->tag); |
38b8221f RK |
193 | if(c->w) |
194 | ev_writer_close(c->w); | |
195 | c->w = 0; | |
196 | c->r = 0; | |
768d7355 | 197 | ev_report(ev); |
0126692c | 198 | remove_connection(c); |
460b9539 | 199 | return 0; |
200 | } | |
201 | ||
460b9539 | 202 | static int c_disable(struct conn *c, char **vec, int nvec) { |
203 | if(nvec == 0) | |
204 | disable_playing(c->who); | |
205 | else if(nvec == 1 && !strcmp(vec[0], "now")) | |
206 | disable_playing(c->who); | |
207 | else { | |
208 | sink_writes(ev_writer_sink(c->w), "550 invalid argument\n"); | |
209 | return 1; /* completed */ | |
210 | } | |
211 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
212 | return 1; /* completed */ | |
213 | } | |
214 | ||
215 | static int c_enable(struct conn *c, | |
216 | char attribute((unused)) **vec, | |
217 | int attribute((unused)) nvec) { | |
218 | enable_playing(c->who, c->ev); | |
219 | /* Enable implicitly unpauses if there is nothing playing */ | |
220 | if(paused && !playing) resume_playing(c->who); | |
221 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
222 | return 1; /* completed */ | |
223 | } | |
224 | ||
225 | static int c_enabled(struct conn *c, | |
226 | char attribute((unused)) **vec, | |
227 | int attribute((unused)) nvec) { | |
228 | sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[playing_is_enabled()]); | |
229 | return 1; /* completed */ | |
230 | } | |
231 | ||
232 | static int c_play(struct conn *c, char **vec, | |
233 | int attribute((unused)) nvec) { | |
234 | const char *track; | |
235 | struct queue_entry *q; | |
236 | ||
237 | if(!trackdb_exists(vec[0])) { | |
238 | sink_writes(ev_writer_sink(c->w), "550 track is not in database\n"); | |
239 | return 1; | |
240 | } | |
241 | if(!(track = trackdb_resolve(vec[0]))) { | |
242 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
243 | return 1; | |
244 | } | |
245 | q = queue_add(track, c->who, WHERE_BEFORE_RANDOM); | |
246 | queue_write(); | |
247 | /* If we added the first track, and something is playing, then prepare the | |
248 | * new track. If nothing is playing then we don't bother as it wouldn't gain | |
249 | * anything. */ | |
250 | if(q == qhead.next && playing) | |
251 | prepare(c->ev, q); | |
81e440ce | 252 | sink_printf(ev_writer_sink(c->w), "252 %s\n", q->id); |
460b9539 | 253 | /* If the queue was empty but we are for some reason paused then |
254 | * unpause. */ | |
255 | if(!playing) resume_playing(0); | |
256 | play(c->ev); | |
257 | return 1; /* completed */ | |
258 | } | |
259 | ||
260 | static int c_remove(struct conn *c, char **vec, | |
261 | int attribute((unused)) nvec) { | |
262 | struct queue_entry *q; | |
263 | ||
264 | if(!(q = queue_find(vec[0]))) { | |
265 | sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n"); | |
266 | return 1; | |
267 | } | |
938d8157 | 268 | if(!right_removable(c->rights, c->who, q)) { |
834e7c4a | 269 | error(0, "%s attempted remove but lacks required rights", c->who); |
eb5dc014 | 270 | sink_writes(ev_writer_sink(c->w), |
b4a80f69 | 271 | "510 Not authorized to remove that track\n"); |
eb5dc014 | 272 | return 1; |
460b9539 | 273 | } |
274 | queue_remove(q, c->who); | |
275 | /* De-prepare the track. */ | |
276 | abandon(c->ev, q); | |
49a773eb RK |
277 | /* See about adding a new random track */ |
278 | add_random_track(c->ev); | |
460b9539 | 279 | /* Prepare whatever the next head track is. */ |
280 | if(qhead.next != &qhead) | |
281 | prepare(c->ev, qhead.next); | |
282 | queue_write(); | |
283 | sink_writes(ev_writer_sink(c->w), "250 removed\n"); | |
284 | return 1; /* completed */ | |
285 | } | |
286 | ||
287 | static int c_scratch(struct conn *c, | |
288 | char **vec, | |
289 | int nvec) { | |
290 | if(!playing) { | |
291 | sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n"); | |
292 | return 1; /* completed */ | |
293 | } | |
eb5dc014 RK |
294 | /* TODO there is a bug here: if we specify an ID but it's not the currently |
295 | * playing track then you will get 550 if you weren't authorized to scratch | |
296 | * the currently playing track. */ | |
938d8157 | 297 | if(!right_scratchable(c->rights, c->who, playing)) { |
834e7c4a | 298 | error(0, "%s attempted scratch but lacks required rights", c->who); |
eb5dc014 | 299 | sink_writes(ev_writer_sink(c->w), |
b4a80f69 | 300 | "510 Not authorized to scratch that track\n"); |
eb5dc014 | 301 | return 1; |
460b9539 | 302 | } |
303 | scratch(c->who, nvec == 1 ? vec[0] : 0); | |
304 | /* If you scratch an unpaused track then it is automatically unpaused */ | |
305 | resume_playing(0); | |
306 | sink_writes(ev_writer_sink(c->w), "250 scratched\n"); | |
307 | return 1; /* completed */ | |
308 | } | |
309 | ||
310 | static int c_pause(struct conn *c, | |
311 | char attribute((unused)) **vec, | |
312 | int attribute((unused)) nvec) { | |
313 | if(!playing) { | |
314 | sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n"); | |
315 | return 1; /* completed */ | |
316 | } | |
317 | if(paused) { | |
318 | sink_writes(ev_writer_sink(c->w), "250 already paused\n"); | |
319 | return 1; /* completed */ | |
320 | } | |
321 | if(pause_playing(c->who) < 0) | |
322 | sink_writes(ev_writer_sink(c->w), "550 cannot pause this track\n"); | |
323 | else | |
324 | sink_writes(ev_writer_sink(c->w), "250 paused\n"); | |
325 | return 1; | |
326 | } | |
327 | ||
328 | static int c_resume(struct conn *c, | |
329 | char attribute((unused)) **vec, | |
330 | int attribute((unused)) nvec) { | |
331 | if(!paused) { | |
332 | sink_writes(ev_writer_sink(c->w), "250 not paused\n"); | |
333 | return 1; /* completed */ | |
334 | } | |
335 | resume_playing(c->who); | |
336 | sink_writes(ev_writer_sink(c->w), "250 paused\n"); | |
337 | return 1; | |
338 | } | |
339 | ||
340 | static int c_shutdown(struct conn *c, | |
341 | char attribute((unused)) **vec, | |
342 | int attribute((unused)) nvec) { | |
343 | info("S%x shut down by %s", c->tag, c->who); | |
344 | sink_writes(ev_writer_sink(c->w), "250 shutting down\n"); | |
345 | ev_writer_flush(c->w); | |
346 | quit(c->ev); | |
347 | } | |
348 | ||
349 | static int c_reconfigure(struct conn *c, | |
350 | char attribute((unused)) **vec, | |
351 | int attribute((unused)) nvec) { | |
352 | info("S%x reconfigure by %s", c->tag, c->who); | |
353 | if(reconfigure(c->ev, 1)) | |
354 | sink_writes(ev_writer_sink(c->w), "550 error reading new config\n"); | |
355 | else | |
356 | sink_writes(ev_writer_sink(c->w), "250 installed new config\n"); | |
357 | return 1; /* completed */ | |
358 | } | |
359 | ||
dd9af5cb RK |
360 | static void finished_rescan(void *ru) { |
361 | struct conn *const c = ru; | |
362 | ||
363 | sink_writes(ev_writer_sink(c->w), "250 rescan completed\n"); | |
364 | /* Turn this connection back on */ | |
365 | ev_reader_enable(c->r); | |
366 | } | |
367 | ||
368 | static void start_fresh_rescan(void *ru) { | |
369 | struct conn *const c = ru; | |
370 | ||
371 | if(trackdb_rescan_underway()) { | |
372 | /* Some other waiter beat us to it. However in this case we're happy to | |
373 | * piggyback; the requirement is that a new rescan be started, not that it | |
374 | * was _our_ rescan. */ | |
375 | if(c->rescan_wait) { | |
376 | /* We block until the rescan completes */ | |
377 | trackdb_add_rescanned(finished_rescan, c); | |
378 | } else { | |
379 | /* We report that the new rescan has started */ | |
380 | sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n"); | |
381 | /* Turn this connection back on */ | |
382 | ev_reader_enable(c->r); | |
383 | } | |
384 | } else { | |
385 | /* We are the first connection to get a callback so we must start a | |
386 | * rescan. */ | |
387 | if(c->rescan_wait) { | |
388 | /* We want to block until the new rescan completes */ | |
389 | trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c); | |
390 | } else { | |
391 | /* We can report back immediately */ | |
392 | trackdb_rescan(c->ev, 1/*check*/, 0, 0); | |
393 | sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n"); | |
394 | /* Turn this connection back on */ | |
395 | ev_reader_enable(c->r); | |
396 | } | |
397 | } | |
398 | } | |
399 | ||
460b9539 | 400 | static int c_rescan(struct conn *c, |
dd9af5cb RK |
401 | char **vec, |
402 | int nvec) { | |
403 | int wait = 0, fresh = 0, n; | |
404 | ||
405 | /* Parse flags */ | |
406 | for(n = 0; n < nvec; ++n) { | |
407 | if(!strcmp(vec[n], "wait")) | |
408 | wait = 1; /* wait for rescan to complete */ | |
409 | #if 0 | |
410 | /* Currently disabled because untested (and hard to test). */ | |
411 | else if(!strcmp(vec[n], "fresh")) | |
412 | fresh = 1; /* don't piggyback underway rescan */ | |
413 | #endif | |
414 | else { | |
415 | sink_writes(ev_writer_sink(c->w), "550 unknown flag\n"); | |
416 | return 1; /* completed */ | |
417 | } | |
418 | } | |
419 | /* Report what was requested */ | |
420 | info("S%x rescan by %s (%s %s)", c->tag, c->who, | |
421 | wait ? "wait" : "", | |
422 | fresh ? "fresh" : ""); | |
423 | if(trackdb_rescan_underway()) { | |
424 | if(fresh) { | |
425 | /* We want a fresh rescan but there is already one underway. Arrange a | |
426 | * callback when it completes and then set off a new one. */ | |
427 | c->rescan_wait = wait; | |
428 | trackdb_add_rescanned(start_fresh_rescan, c); | |
429 | if(wait) | |
430 | return 0; | |
431 | else { | |
432 | sink_writes(ev_writer_sink(c->w), "250 rescan queued\n"); | |
433 | return 1; | |
434 | } | |
435 | } else { | |
436 | /* There's a rescan underway, and it's acceptable to piggyback on it */ | |
437 | if(wait) { | |
438 | /* We want to block until completion. */ | |
439 | trackdb_add_rescanned(finished_rescan, c); | |
440 | return 0; | |
441 | } else { | |
442 | /* We don't want to block. So we just report that things are in | |
443 | * hand. */ | |
444 | sink_writes(ev_writer_sink(c->w), "250 rescan already underway\n"); | |
445 | return 1; | |
446 | } | |
447 | } | |
448 | } else { | |
449 | /* No rescan is underway. fresh is therefore irrelevant. */ | |
450 | if(wait) { | |
451 | /* We want to block until completion */ | |
452 | trackdb_rescan(c->ev, 1/*check*/, finished_rescan, c); | |
453 | return 0; | |
454 | } else { | |
455 | /* We don't want to block. */ | |
456 | trackdb_rescan(c->ev, 1/*check*/, 0, 0); | |
457 | sink_writes(ev_writer_sink(c->w), "250 rescan initiated\n"); | |
458 | return 1; /* completed */ | |
459 | } | |
460 | } | |
460b9539 | 461 | } |
462 | ||
463 | static int c_version(struct conn *c, | |
464 | char attribute((unused)) **vec, | |
465 | int attribute((unused)) nvec) { | |
466 | /* VERSION had better only use the basic character set */ | |
a05e4467 | 467 | sink_printf(ev_writer_sink(c->w), "251 %s\n", disorder_short_version_string); |
460b9539 | 468 | return 1; /* completed */ |
469 | } | |
470 | ||
471 | static int c_playing(struct conn *c, | |
472 | char attribute((unused)) **vec, | |
473 | int attribute((unused)) nvec) { | |
474 | if(playing) { | |
475 | queue_fix_sofar(playing); | |
476 | playing->expected = 0; | |
477 | sink_printf(ev_writer_sink(c->w), "252 %s\n", queue_marshall(playing)); | |
478 | } else | |
479 | sink_printf(ev_writer_sink(c->w), "259 nothing playing\n"); | |
480 | return 1; /* completed */ | |
481 | } | |
482 | ||
b12be54a | 483 | static const char *connection_host(struct conn *c) { |
460b9539 | 484 | union { |
485 | struct sockaddr sa; | |
486 | struct sockaddr_in in; | |
487 | struct sockaddr_in6 in6; | |
488 | } u; | |
489 | socklen_t l; | |
b12be54a | 490 | int n; |
460b9539 | 491 | char host[1024]; |
492 | ||
460b9539 | 493 | /* get connection data */ |
494 | l = sizeof u; | |
495 | if(getpeername(c->fd, &u.sa, &l) < 0) { | |
496 | error(errno, "S%x error calling getpeername", c->tag); | |
b12be54a | 497 | return 0; |
460b9539 | 498 | } |
499 | if(c->l->pf != PF_UNIX) { | |
500 | if((n = getnameinfo(&u.sa, l, | |
501 | host, sizeof host, 0, 0, NI_NUMERICHOST))) { | |
502 | error(0, "S%x error calling getnameinfo: %s", c->tag, gai_strerror(n)); | |
b12be54a | 503 | return 0; |
460b9539 | 504 | } |
b12be54a | 505 | return xstrdup(host); |
18e6d6e6 | 506 | } else |
b12be54a RK |
507 | return "local"; |
508 | } | |
509 | ||
510 | static int c_user(struct conn *c, | |
511 | char **vec, | |
512 | int attribute((unused)) nvec) { | |
eb5dc014 | 513 | struct kvp *k; |
f0feb22e | 514 | const char *res, *host, *password; |
eb5dc014 | 515 | rights_type rights; |
b12be54a RK |
516 | |
517 | if(c->who) { | |
518 | sink_writes(ev_writer_sink(c->w), "530 already authenticated\n"); | |
519 | return 1; | |
520 | } | |
521 | /* get connection data */ | |
522 | if(!(host = connection_host(c))) { | |
523 | sink_writes(ev_writer_sink(c->w), "530 authentication failure\n"); | |
524 | return 1; | |
525 | } | |
460b9539 | 526 | /* find the user */ |
eb5dc014 | 527 | k = trackdb_getuserinfo(vec[0]); |
f0feb22e | 528 | /* reject nonexistent users */ |
eb5dc014 RK |
529 | if(!k) { |
530 | error(0, "S%x unknown user '%s' from %s", c->tag, vec[0], host); | |
531 | sink_writes(ev_writer_sink(c->w), "530 authentication failed\n"); | |
532 | return 1; | |
533 | } | |
534 | /* reject unconfirmed users */ | |
535 | if(kvp_get(k, "confirmation")) { | |
536 | error(0, "S%x unconfirmed user '%s' from %s", c->tag, vec[0], host); | |
537 | sink_writes(ev_writer_sink(c->w), "530 authentication failed\n"); | |
538 | return 1; | |
539 | } | |
540 | password = kvp_get(k, "password"); | |
541 | if(!password) password = ""; | |
0f55e905 | 542 | if(parse_rights(kvp_get(k, "rights"), &rights, 1)) { |
eb5dc014 | 543 | error(0, "error parsing rights for %s", vec[0]); |
18e6d6e6 | 544 | sink_writes(ev_writer_sink(c->w), "530 authentication failed\n"); |
545 | return 1; | |
546 | } | |
f0feb22e RK |
547 | /* check whether the response is right */ |
548 | res = authhash(c->nonce, sizeof c->nonce, password, | |
637fdea3 | 549 | config->authorization_algorithm); |
18e6d6e6 | 550 | if(wideopen || (res && !strcmp(res, vec[1]))) { |
551 | c->who = vec[0]; | |
eb5dc014 | 552 | c->rights = rights; |
18e6d6e6 | 553 | /* currently we only bother logging remote connections */ |
30365519 | 554 | if(strcmp(host, "local")) |
18e6d6e6 | 555 | info("S%x %s connected from %s", c->tag, vec[0], host); |
30365519 | 556 | else |
eb5dc014 | 557 | c->rights |= RIGHT__LOCAL; |
18e6d6e6 | 558 | sink_writes(ev_writer_sink(c->w), "230 OK\n"); |
559 | return 1; | |
460b9539 | 560 | } |
561 | /* oops, response was wrong */ | |
18e6d6e6 | 562 | info("S%x authentication failure for %s from %s", c->tag, vec[0], host); |
460b9539 | 563 | sink_writes(ev_writer_sink(c->w), "530 authentication failed\n"); |
564 | return 1; | |
565 | } | |
566 | ||
567 | static int c_recent(struct conn *c, | |
568 | char attribute((unused)) **vec, | |
569 | int attribute((unused)) nvec) { | |
570 | const struct queue_entry *q; | |
571 | ||
572 | sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n"); | |
573 | for(q = phead.next; q != &phead; q = q->next) | |
574 | sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q)); | |
575 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
576 | return 1; /* completed */ | |
577 | } | |
578 | ||
579 | static int c_queue(struct conn *c, | |
580 | char attribute((unused)) **vec, | |
581 | int attribute((unused)) nvec) { | |
582 | struct queue_entry *q; | |
583 | time_t when = 0; | |
584 | const char *l; | |
585 | long length; | |
586 | ||
587 | sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n"); | |
588 | if(playing_is_enabled() && !paused) { | |
589 | if(playing) { | |
590 | queue_fix_sofar(playing); | |
591 | if((l = trackdb_get(playing->track, "_length")) | |
592 | && (length = atol(l))) { | |
593 | time(&when); | |
594 | when += length - playing->sofar + config->gap; | |
595 | } | |
596 | } else | |
597 | /* Nothing is playing but playing is enabled, so whatever is | |
598 | * first in the queue can be expected to start immediately. */ | |
599 | time(&when); | |
600 | } | |
601 | for(q = qhead.next; q != &qhead; q = q->next) { | |
602 | /* fill in estimated start time */ | |
603 | q->expected = when; | |
604 | sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q)); | |
605 | /* update for next track */ | |
606 | if(when) { | |
607 | if((l = trackdb_get(q->track, "_length")) | |
608 | && (length = atol(l))) | |
609 | when += length + config->gap; | |
610 | else | |
611 | when = 0; | |
612 | } | |
613 | } | |
614 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
615 | return 1; /* completed */ | |
616 | } | |
617 | ||
618 | static int output_list(struct conn *c, char **vec) { | |
619 | while(*vec) | |
620 | sink_printf(ev_writer_sink(c->w), "%s\n", *vec++); | |
621 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
622 | return 1; | |
623 | } | |
624 | ||
625 | static int files_dirs(struct conn *c, | |
626 | char **vec, | |
627 | int nvec, | |
628 | enum trackdb_listable what) { | |
629 | const char *dir, *re, *errstr; | |
630 | int erroffset; | |
631 | pcre *rec; | |
632 | char **fvec, *key; | |
633 | ||
634 | switch(nvec) { | |
635 | case 0: dir = 0; re = 0; break; | |
636 | case 1: dir = vec[0]; re = 0; break; | |
637 | case 2: dir = vec[0]; re = vec[1]; break; | |
638 | default: abort(); | |
639 | } | |
640 | /* A bit of a bodge to make sure the args don't trample on cache keys */ | |
641 | if(dir && strchr(dir, '\n')) { | |
642 | sink_writes(ev_writer_sink(c->w), "550 invalid directory name\n"); | |
643 | return 1; | |
644 | } | |
645 | if(re && strchr(re, '\n')) { | |
646 | sink_writes(ev_writer_sink(c->w), "550 invalid regexp\n"); | |
647 | return 1; | |
648 | } | |
649 | /* We bother eliminating "" because the web interface is relatively | |
650 | * likely to send it */ | |
651 | if(re && *re) { | |
652 | byte_xasprintf(&key, "%d\n%s\n%s", (int)what, dir ? dir : "", re); | |
653 | fvec = (char **)cache_get(&cache_files_type, key); | |
654 | if(fvec) { | |
655 | /* Got a cache hit, don't store the answer in the cache */ | |
656 | key = 0; | |
657 | ++cache_files_hits; | |
658 | rec = 0; /* quieten compiler */ | |
659 | } else { | |
660 | /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer | |
661 | * in the cache. */ | |
662 | if(!(rec = pcre_compile(re, PCRE_CASELESS|PCRE_UTF8, | |
663 | &errstr, &erroffset, 0))) { | |
664 | sink_printf(ev_writer_sink(c->w), "550 Error compiling regexp: %s\n", | |
665 | errstr); | |
666 | return 1; | |
667 | } | |
668 | /* It only counts as a miss if the regexp was valid. */ | |
669 | ++cache_files_misses; | |
670 | } | |
671 | } else { | |
672 | /* No regexp, don't bother caching the result */ | |
673 | rec = 0; | |
674 | key = 0; | |
675 | fvec = 0; | |
676 | } | |
677 | if(!fvec) { | |
678 | /* No cache hit (either because a miss, or because we did not look) so do | |
679 | * the lookup */ | |
680 | if(dir && *dir) | |
681 | fvec = trackdb_list(dir, 0, what, rec); | |
682 | else | |
683 | fvec = trackdb_list(0, 0, what, rec); | |
684 | } | |
685 | if(key) | |
686 | /* Put the answer in the cache */ | |
687 | cache_put(&cache_files_type, key, fvec); | |
688 | sink_writes(ev_writer_sink(c->w), "253 Listing follow\n"); | |
689 | return output_list(c, fvec); | |
690 | } | |
691 | ||
692 | static int c_files(struct conn *c, | |
693 | char **vec, | |
694 | int nvec) { | |
695 | return files_dirs(c, vec, nvec, trackdb_files); | |
696 | } | |
697 | ||
698 | static int c_dirs(struct conn *c, | |
699 | char **vec, | |
700 | int nvec) { | |
701 | return files_dirs(c, vec, nvec, trackdb_directories); | |
702 | } | |
703 | ||
704 | static int c_allfiles(struct conn *c, | |
705 | char **vec, | |
706 | int nvec) { | |
707 | return files_dirs(c, vec, nvec, trackdb_directories|trackdb_files); | |
708 | } | |
709 | ||
710 | static int c_get(struct conn *c, | |
711 | char **vec, | |
712 | int attribute((unused)) nvec) { | |
27ed5a69 | 713 | const char *v, *track; |
460b9539 | 714 | |
27ed5a69 RK |
715 | if(!(track = trackdb_resolve(vec[0]))) { |
716 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
717 | return 1; | |
718 | } | |
719 | if(vec[1][0] != '_' && (v = trackdb_get(track, vec[1]))) | |
7b32e917 | 720 | sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v)); |
460b9539 | 721 | else |
fb1bc1f5 | 722 | sink_writes(ev_writer_sink(c->w), "555 not found\n"); |
460b9539 | 723 | return 1; |
724 | } | |
725 | ||
726 | static int c_length(struct conn *c, | |
727 | char **vec, | |
728 | int attribute((unused)) nvec) { | |
729 | const char *track, *v; | |
730 | ||
731 | if(!(track = trackdb_resolve(vec[0]))) { | |
732 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
733 | return 1; | |
734 | } | |
735 | if((v = trackdb_get(track, "_length"))) | |
7b32e917 | 736 | sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(v)); |
460b9539 | 737 | else |
738 | sink_writes(ev_writer_sink(c->w), "550 not found\n"); | |
739 | return 1; | |
740 | } | |
741 | ||
742 | static int c_set(struct conn *c, | |
743 | char **vec, | |
744 | int attribute((unused)) nvec) { | |
27ed5a69 RK |
745 | const char *track; |
746 | ||
747 | if(!(track = trackdb_resolve(vec[0]))) { | |
748 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
749 | return 1; | |
750 | } | |
751 | if(vec[1][0] != '_' && !trackdb_set(track, vec[1], vec[2])) | |
460b9539 | 752 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); |
753 | else | |
754 | sink_writes(ev_writer_sink(c->w), "550 not found\n"); | |
755 | return 1; | |
756 | } | |
757 | ||
758 | static int c_prefs(struct conn *c, | |
759 | char **vec, | |
760 | int attribute((unused)) nvec) { | |
761 | struct kvp *k; | |
27ed5a69 | 762 | const char *track; |
460b9539 | 763 | |
27ed5a69 RK |
764 | if(!(track = trackdb_resolve(vec[0]))) { |
765 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
766 | return 1; | |
767 | } | |
768 | k = trackdb_get_all(track); | |
460b9539 | 769 | sink_writes(ev_writer_sink(c->w), "253 prefs follow\n"); |
770 | for(; k; k = k->next) | |
771 | if(k->name[0] != '_') /* omit internal values */ | |
772 | sink_printf(ev_writer_sink(c->w), | |
773 | " %s %s\n", quoteutf8(k->name), quoteutf8(k->value)); | |
774 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
775 | return 1; | |
776 | } | |
777 | ||
778 | static int c_exists(struct conn *c, | |
779 | char **vec, | |
780 | int attribute((unused)) nvec) { | |
27ed5a69 | 781 | /* trackdb_exists() does its own alias checking */ |
460b9539 | 782 | sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]); |
783 | return 1; | |
784 | } | |
785 | ||
786 | static void search_parse_error(const char *msg, void *u) { | |
787 | *(const char **)u = msg; | |
788 | } | |
789 | ||
790 | static int c_search(struct conn *c, | |
791 | char **vec, | |
792 | int attribute((unused)) nvec) { | |
793 | char **terms, **results; | |
794 | int nterms, nresults, n; | |
795 | const char *e = "unknown error"; | |
796 | ||
797 | /* This is a bit of a bodge. Initially it's there to make the eclient | |
798 | * interface a bit more convenient to add searching to, but it has the more | |
799 | * compelling advantage that if everything uses it, then interpretation of | |
800 | * user-supplied search strings will be the same everywhere. */ | |
801 | if(!(terms = split(vec[0], &nterms, SPLIT_QUOTES, search_parse_error, &e))) { | |
802 | sink_printf(ev_writer_sink(c->w), "550 %s\n", e); | |
803 | } else { | |
804 | results = trackdb_search(terms, nterms, &nresults); | |
805 | sink_printf(ev_writer_sink(c->w), "253 %d matches\n", nresults); | |
806 | for(n = 0; n < nresults; ++n) | |
807 | sink_printf(ev_writer_sink(c->w), "%s\n", results[n]); | |
808 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
809 | } | |
810 | return 1; | |
811 | } | |
812 | ||
813 | static int c_random_enable(struct conn *c, | |
814 | char attribute((unused)) **vec, | |
815 | int attribute((unused)) nvec) { | |
816 | enable_random(c->who, c->ev); | |
817 | /* Enable implicitly unpauses if there is nothing playing */ | |
818 | if(paused && !playing) resume_playing(c->who); | |
819 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
820 | return 1; /* completed */ | |
821 | } | |
822 | ||
823 | static int c_random_disable(struct conn *c, | |
824 | char attribute((unused)) **vec, | |
825 | int attribute((unused)) nvec) { | |
826 | disable_random(c->who); | |
827 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
828 | return 1; /* completed */ | |
829 | } | |
830 | ||
831 | static int c_random_enabled(struct conn *c, | |
832 | char attribute((unused)) **vec, | |
833 | int attribute((unused)) nvec) { | |
834 | sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[random_is_enabled()]); | |
835 | return 1; /* completed */ | |
836 | } | |
837 | ||
d6dde5a3 RK |
838 | static void got_stats(char *stats, void *u) { |
839 | struct conn *const c = u; | |
840 | ||
841 | sink_printf(ev_writer_sink(c->w), "253 stats\n%s\n.\n", stats); | |
842 | /* Now we can start processing commands again */ | |
843 | ev_reader_enable(c->r); | |
844 | } | |
845 | ||
460b9539 | 846 | static int c_stats(struct conn *c, |
847 | char attribute((unused)) **vec, | |
848 | int attribute((unused)) nvec) { | |
d6dde5a3 RK |
849 | trackdb_stats_subprocess(c->ev, got_stats, c); |
850 | return 0; /* not yet complete */ | |
460b9539 | 851 | } |
852 | ||
853 | static int c_volume(struct conn *c, | |
854 | char **vec, | |
855 | int nvec) { | |
856 | int l, r, set; | |
857 | char lb[32], rb[32]; | |
eb5dc014 | 858 | rights_type rights; |
460b9539 | 859 | |
860 | switch(nvec) { | |
861 | case 0: | |
862 | set = 0; | |
863 | break; | |
864 | case 1: | |
865 | l = r = atoi(vec[0]); | |
866 | set = 1; | |
867 | break; | |
868 | case 2: | |
869 | l = atoi(vec[0]); | |
870 | r = atoi(vec[1]); | |
871 | set = 1; | |
872 | break; | |
873 | default: | |
874 | abort(); | |
875 | } | |
eb5dc014 RK |
876 | rights = set ? RIGHT_VOLUME : RIGHT_READ; |
877 | if(!(c->rights & rights)) { | |
834e7c4a | 878 | error(0, "%s attempted to set volume but lacks required rights", c->who); |
b4a80f69 | 879 | sink_writes(ev_writer_sink(c->w), "510 Prohibited\n"); |
eb5dc014 RK |
880 | return 1; |
881 | } | |
3c499fe7 | 882 | if(mixer_control(-1/*as configured*/, &l, &r, set)) |
460b9539 | 883 | sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n"); |
884 | else { | |
885 | sink_printf(ev_writer_sink(c->w), "252 %d %d\n", l, r); | |
886 | if(l != volume_left || r != volume_right) { | |
887 | volume_left = l; | |
888 | volume_right = r; | |
889 | snprintf(lb, sizeof lb, "%d", l); | |
890 | snprintf(rb, sizeof rb, "%d", r); | |
891 | eventlog("volume", lb, rb, (char *)0); | |
892 | } | |
893 | } | |
894 | return 1; | |
895 | } | |
896 | ||
397ef7bb RK |
897 | /** @brief Called when data arrives on a log connection |
898 | * | |
899 | * We just discard all such data. The client may occasionally send data as a | |
900 | * keepalive. | |
901 | */ | |
902 | static int logging_reader_callback(ev_source attribute((unused)) *ev, | |
460b9539 | 903 | ev_reader *reader, |
397ef7bb | 904 | void attribute((unused)) *ptr, |
460b9539 | 905 | size_t bytes, |
397ef7bb RK |
906 | int attribute((unused)) eof, |
907 | void attribute((unused)) *u) { | |
460b9539 | 908 | struct conn *c = u; |
909 | ||
397ef7bb RK |
910 | ev_reader_consume(reader, bytes); |
911 | if(eof) { | |
912 | /* Oops, that's all for now */ | |
8d8b8c1f | 913 | D(("logging reader eof")); |
397ef7bb | 914 | if(c->w) { |
8d8b8c1f | 915 | D(("close writer")); |
397ef7bb RK |
916 | ev_writer_close(c->w); |
917 | c->w = 0; | |
918 | } | |
919 | c->r = 0; | |
0126692c | 920 | remove_connection(c); |
f6033c46 | 921 | } |
397ef7bb | 922 | return 0; |
460b9539 | 923 | } |
924 | ||
925 | static void logclient(const char *msg, void *user) { | |
926 | struct conn *c = user; | |
927 | ||
f6033c46 RK |
928 | if(!c->w || !c->r) { |
929 | /* This connection has gone up in smoke for some reason */ | |
930 | eventlog_remove(c->lo); | |
931 | return; | |
932 | } | |
460b9539 | 933 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" %s\n", |
934 | (uintmax_t)time(0), msg); | |
935 | } | |
936 | ||
937 | static int c_log(struct conn *c, | |
938 | char attribute((unused)) **vec, | |
939 | int attribute((unused)) nvec) { | |
940 | time_t now; | |
941 | ||
942 | sink_writes(ev_writer_sink(c->w), "254 OK\n"); | |
943 | /* pump out initial state */ | |
944 | time(&now); | |
945 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n", | |
946 | (uintmax_t)now, | |
947 | playing_is_enabled() ? "enable_play" : "disable_play"); | |
948 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n", | |
949 | (uintmax_t)now, | |
950 | random_is_enabled() ? "enable_random" : "disable_random"); | |
951 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n", | |
952 | (uintmax_t)now, | |
953 | paused ? "pause" : "resume"); | |
5abe307a RK |
954 | if(playing) |
955 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state playing\n", | |
956 | (uintmax_t)now); | |
df44d69b RK |
957 | /* Initial volume */ |
958 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" volume %d %d\n", | |
959 | (uintmax_t)now, volume_left, volume_right); | |
460b9539 | 960 | c->lo = xmalloc(sizeof *c->lo); |
961 | c->lo->fn = logclient; | |
962 | c->lo->user = c; | |
963 | eventlog_add(c->lo); | |
964 | c->reader = logging_reader_callback; | |
965 | return 0; | |
966 | } | |
967 | ||
eb5dc014 RK |
968 | /** @brief Test whether a move is allowed |
969 | * @param c Connection | |
970 | * @param qs List of IDs on queue | |
971 | * @param nqs Number of IDs | |
972 | * @return 0 if move is prohibited, non-0 if it is allowed | |
973 | */ | |
974 | static int has_move_rights(struct conn *c, struct queue_entry **qs, int nqs) { | |
eb5dc014 RK |
975 | for(; nqs > 0; ++qs, --nqs) { |
976 | struct queue_entry *const q = *qs; | |
977 | ||
938d8157 | 978 | if(!right_movable(c->rights, c->who, q)) |
979 | return 0; | |
eb5dc014 | 980 | } |
938d8157 | 981 | return 1; |
eb5dc014 RK |
982 | } |
983 | ||
460b9539 | 984 | static int c_move(struct conn *c, |
985 | char **vec, | |
986 | int attribute((unused)) nvec) { | |
987 | struct queue_entry *q; | |
988 | int n; | |
989 | ||
460b9539 | 990 | if(!(q = queue_find(vec[0]))) { |
991 | sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n"); | |
992 | return 1; | |
993 | } | |
eb5dc014 | 994 | if(!has_move_rights(c, &q, 1)) { |
834e7c4a | 995 | error(0, "%s attempted move but lacks required rights", c->who); |
eb5dc014 | 996 | sink_writes(ev_writer_sink(c->w), |
b4a80f69 | 997 | "510 Not authorized to move that track\n"); |
eb5dc014 RK |
998 | return 1; |
999 | } | |
460b9539 | 1000 | n = queue_move(q, atoi(vec[1]), c->who); |
460b9539 | 1001 | sink_printf(ev_writer_sink(c->w), "252 %d\n", n); |
1002 | /* If we've moved to the head of the queue then prepare the track. */ | |
1003 | if(q == qhead.next) | |
1004 | prepare(c->ev, q); | |
1005 | return 1; | |
1006 | } | |
1007 | ||
1008 | static int c_moveafter(struct conn *c, | |
1009 | char **vec, | |
1010 | int attribute((unused)) nvec) { | |
1011 | struct queue_entry *q, **qs; | |
1012 | int n; | |
1013 | ||
460b9539 | 1014 | if(vec[0][0]) { |
1015 | if(!(q = queue_find(vec[0]))) { | |
1016 | sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n"); | |
1017 | return 1; | |
1018 | } | |
1019 | } else | |
1020 | q = 0; | |
1021 | ++vec; | |
1022 | --nvec; | |
1023 | qs = xcalloc(nvec, sizeof *qs); | |
1024 | for(n = 0; n < nvec; ++n) | |
1025 | if(!(qs[n] = queue_find(vec[n]))) { | |
1026 | sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n"); | |
1027 | return 1; | |
1028 | } | |
eb5dc014 | 1029 | if(!has_move_rights(c, qs, nvec)) { |
834e7c4a | 1030 | error(0, "%s attempted moveafter but lacks required rights", c->who); |
eb5dc014 | 1031 | sink_writes(ev_writer_sink(c->w), |
b4a80f69 | 1032 | "510 Not authorized to move those tracks\n"); |
eb5dc014 RK |
1033 | return 1; |
1034 | } | |
460b9539 | 1035 | queue_moveafter(q, nvec, qs, c->who); |
460b9539 | 1036 | sink_printf(ev_writer_sink(c->w), "250 Moved tracks\n"); |
1037 | /* If we've moved to the head of the queue then prepare the track. */ | |
1038 | if(q == qhead.next) | |
1039 | prepare(c->ev, q); | |
1040 | return 1; | |
1041 | } | |
1042 | ||
1043 | static int c_part(struct conn *c, | |
1044 | char **vec, | |
1045 | int attribute((unused)) nvec) { | |
27ed5a69 RK |
1046 | const char *track; |
1047 | ||
1048 | if(!(track = trackdb_resolve(vec[0]))) { | |
1049 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
1050 | return 1; | |
1051 | } | |
460b9539 | 1052 | sink_printf(ev_writer_sink(c->w), "252 %s\n", |
27ed5a69 | 1053 | quoteutf8(trackdb_getpart(track, vec[1], vec[2]))); |
460b9539 | 1054 | return 1; |
1055 | } | |
1056 | ||
1057 | static int c_resolve(struct conn *c, | |
1058 | char **vec, | |
1059 | int attribute((unused)) nvec) { | |
1060 | const char *track; | |
1061 | ||
1062 | if(!(track = trackdb_resolve(vec[0]))) { | |
1063 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
1064 | return 1; | |
1065 | } | |
7b32e917 | 1066 | sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(track)); |
460b9539 | 1067 | return 1; |
1068 | } | |
1069 | ||
1070 | static int c_tags(struct conn *c, | |
1071 | char attribute((unused)) **vec, | |
1072 | int attribute((unused)) nvec) { | |
1073 | char **tags = trackdb_alltags(); | |
1074 | ||
1075 | sink_printf(ev_writer_sink(c->w), "253 Tag list follows\n"); | |
1076 | while(*tags) { | |
1077 | sink_printf(ev_writer_sink(c->w), "%s%s\n", | |
1078 | **tags == '.' ? "." : "", *tags); | |
1079 | ++tags; | |
1080 | } | |
1081 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
1082 | return 1; /* completed */ | |
460b9539 | 1083 | } |
1084 | ||
1085 | static int c_set_global(struct conn *c, | |
1086 | char **vec, | |
1087 | int attribute((unused)) nvec) { | |
f9635e06 RK |
1088 | if(vec[0][0] == '_') { |
1089 | sink_writes(ev_writer_sink(c->w), "550 cannot set internal global preferences\n"); | |
1090 | return 1; | |
1091 | } | |
460b9539 | 1092 | trackdb_set_global(vec[0], vec[1], c->who); |
1093 | sink_printf(ev_writer_sink(c->w), "250 OK\n"); | |
1094 | return 1; | |
1095 | } | |
1096 | ||
1097 | static int c_get_global(struct conn *c, | |
1098 | char **vec, | |
1099 | int attribute((unused)) nvec) { | |
1100 | const char *s = trackdb_get_global(vec[0]); | |
1101 | ||
1102 | if(s) | |
7b32e917 | 1103 | sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(s)); |
460b9539 | 1104 | else |
fb1bc1f5 | 1105 | sink_writes(ev_writer_sink(c->w), "555 not found\n"); |
460b9539 | 1106 | return 1; |
1107 | } | |
1108 | ||
7858930d | 1109 | static int c_nop(struct conn *c, |
1110 | char attribute((unused)) **vec, | |
1111 | int attribute((unused)) nvec) { | |
1112 | sink_printf(ev_writer_sink(c->w), "250 Quack\n"); | |
1113 | return 1; | |
1114 | } | |
1115 | ||
2a10b70b RK |
1116 | static int c_new(struct conn *c, |
1117 | char **vec, | |
1118 | int nvec) { | |
d742bb47 RK |
1119 | int max, n; |
1120 | char **tracks; | |
2a10b70b | 1121 | |
d742bb47 RK |
1122 | if(nvec > 0) |
1123 | max = atoi(vec[0]); | |
1124 | else | |
1125 | max = INT_MAX; | |
1126 | if(max <= 0 || max > config->new_max) | |
1127 | max = config->new_max; | |
1128 | tracks = trackdb_new(0, max); | |
2a10b70b | 1129 | sink_printf(ev_writer_sink(c->w), "253 New track list follows\n"); |
d742bb47 | 1130 | n = 0; |
2a10b70b RK |
1131 | while(*tracks) { |
1132 | sink_printf(ev_writer_sink(c->w), "%s%s\n", | |
1133 | **tracks == '.' ? "." : "", *tracks); | |
1134 | ++tracks; | |
1135 | } | |
1136 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
1137 | return 1; /* completed */ | |
1138 | ||
1139 | } | |
1140 | ||
ca831831 RK |
1141 | static int c_rtp_address(struct conn *c, |
1142 | char attribute((unused)) **vec, | |
1143 | int attribute((unused)) nvec) { | |
bd8895a8 | 1144 | if(config->api == BACKEND_NETWORK) { |
ca831831 RK |
1145 | sink_printf(ev_writer_sink(c->w), "252 %s %s\n", |
1146 | quoteutf8(config->broadcast.s[0]), | |
1147 | quoteutf8(config->broadcast.s[1])); | |
1148 | } else | |
1149 | sink_writes(ev_writer_sink(c->w), "550 No RTP\n"); | |
1150 | return 1; | |
1151 | } | |
b12be54a RK |
1152 | |
1153 | static int c_cookie(struct conn *c, | |
1154 | char **vec, | |
1155 | int attribute((unused)) nvec) { | |
1156 | const char *host; | |
1157 | char *user; | |
eb5dc014 | 1158 | rights_type rights; |
b12be54a RK |
1159 | |
1160 | /* Can't log in twice on the same connection */ | |
1161 | if(c->who) { | |
1162 | sink_writes(ev_writer_sink(c->w), "530 already authenticated\n"); | |
1163 | return 1; | |
1164 | } | |
1165 | /* Get some kind of peer identifcation */ | |
1166 | if(!(host = connection_host(c))) { | |
1167 | sink_writes(ev_writer_sink(c->w), "530 authentication failure\n"); | |
1168 | return 1; | |
1169 | } | |
1170 | /* Check the cookie */ | |
eb5dc014 | 1171 | user = verify_cookie(vec[0], &rights); |
b12be54a RK |
1172 | if(!user) { |
1173 | sink_writes(ev_writer_sink(c->w), "530 authentication failure\n"); | |
1174 | return 1; | |
1175 | } | |
1176 | /* Log in */ | |
e48c28bb | 1177 | c->who = user; |
b12be54a | 1178 | c->cookie = vec[0]; |
eb5dc014 | 1179 | c->rights = rights; |
30365519 | 1180 | if(strcmp(host, "local")) |
b12be54a | 1181 | info("S%x %s connected with cookie from %s", c->tag, user, host); |
30365519 | 1182 | else |
eb5dc014 | 1183 | c->rights |= RIGHT__LOCAL; |
0227f67d RK |
1184 | /* Response contains username so client knows who they are acting as */ |
1185 | sink_printf(ev_writer_sink(c->w), "232 %s\n", quoteutf8(user)); | |
b12be54a RK |
1186 | return 1; |
1187 | } | |
1188 | ||
1189 | static int c_make_cookie(struct conn *c, | |
1190 | char attribute((unused)) **vec, | |
1191 | int attribute((unused)) nvec) { | |
1192 | const char *cookie = make_cookie(c->who); | |
1193 | ||
1194 | if(cookie) | |
eb5dc014 | 1195 | sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(cookie)); |
b12be54a RK |
1196 | else |
1197 | sink_writes(ev_writer_sink(c->w), "550 Cannot create cookie\n"); | |
1198 | return 1; | |
1199 | } | |
1200 | ||
1201 | static int c_revoke(struct conn *c, | |
1202 | char attribute((unused)) **vec, | |
1203 | int attribute((unused)) nvec) { | |
1204 | if(c->cookie) { | |
1205 | revoke_cookie(c->cookie); | |
1206 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
1207 | } else | |
1208 | sink_writes(ev_writer_sink(c->w), "550 Did not log in with cookie\n"); | |
1209 | return 1; | |
1210 | } | |
1211 | ||
f0feb22e RK |
1212 | static int c_adduser(struct conn *c, |
1213 | char **vec, | |
0f55e905 RK |
1214 | int nvec) { |
1215 | const char *rights; | |
1216 | ||
810b8083 | 1217 | if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) { |
39e7dcfb | 1218 | error(0, "S%x: remote adduser", c->tag); |
810b8083 RK |
1219 | sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n"); |
1220 | return 1; | |
1221 | } | |
0f55e905 RK |
1222 | if(nvec > 2) { |
1223 | rights = vec[2]; | |
1224 | if(parse_rights(vec[2], 0, 1)) { | |
1225 | sink_writes(ev_writer_sink(c->w), "550 Invalid rights list\n"); | |
1226 | return -1; | |
1227 | } | |
1228 | } else | |
1229 | rights = config->default_rights; | |
1230 | if(trackdb_adduser(vec[0], vec[1], rights, | |
ba39faf6 | 1231 | 0/*email*/, 0/*confirmation*/)) |
f0feb22e RK |
1232 | sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n"); |
1233 | else | |
1234 | sink_writes(ev_writer_sink(c->w), "250 User created\n"); | |
1235 | return 1; | |
1236 | } | |
1237 | ||
1238 | static int c_deluser(struct conn *c, | |
1239 | char **vec, | |
1240 | int attribute((unused)) nvec) { | |
0126692c | 1241 | struct conn *d; |
1242 | ||
810b8083 | 1243 | if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) { |
39e7dcfb | 1244 | error(0, "S%x: remote deluser", c->tag); |
810b8083 RK |
1245 | sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n"); |
1246 | return 1; | |
1247 | } | |
0126692c | 1248 | if(trackdb_deluser(vec[0])) { |
ba39faf6 | 1249 | sink_writes(ev_writer_sink(c->w), "550 Cannot delete user\n"); |
0126692c | 1250 | return 1; |
1251 | } | |
1252 | /* Zap connections belonging to deleted user */ | |
1253 | for(d = connections; d; d = d->next) | |
1254 | if(!strcmp(d->who, vec[0])) | |
1255 | d->rights = 0; | |
1256 | sink_writes(ev_writer_sink(c->w), "250 User deleted\n"); | |
f0feb22e RK |
1257 | return 1; |
1258 | } | |
1259 | ||
1260 | static int c_edituser(struct conn *c, | |
5df73aeb | 1261 | char **vec, |
f0feb22e | 1262 | int attribute((unused)) nvec) { |
0126692c | 1263 | struct conn *d; |
1264 | ||
810b8083 | 1265 | if(!config->remote_userman && !(c->rights & RIGHT__LOCAL)) { |
39e7dcfb | 1266 | error(0, "S%x: remote edituser", c->tag); |
810b8083 RK |
1267 | sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n"); |
1268 | return 1; | |
1269 | } | |
eb5dc014 RK |
1270 | /* RIGHT_ADMIN can do anything; otherwise you can only set your own email |
1271 | * address and password. */ | |
1272 | if((c->rights & RIGHT_ADMIN) | |
5df73aeb RK |
1273 | || (!strcmp(c->who, vec[0]) |
1274 | && (!strcmp(vec[1], "email") | |
1275 | || !strcmp(vec[1], "password")))) { | |
0126692c | 1276 | if(trackdb_edituserinfo(vec[0], vec[1], vec[2])) { |
5df73aeb | 1277 | sink_writes(ev_writer_sink(c->w), "550 Failed to change setting\n"); |
0126692c | 1278 | return 1; |
1279 | } | |
1280 | if(!strcmp(vec[1], "password")) { | |
1281 | /* Zap all connections for this user after a password change */ | |
1282 | for(d = connections; d; d = d->next) | |
1283 | if(!strcmp(d->who, vec[0])) | |
1284 | d->rights = 0; | |
1285 | } else if(!strcmp(vec[1], "rights")) { | |
1286 | /* Update rights for this user */ | |
1287 | rights_type r; | |
1288 | ||
d3369bca | 1289 | if(parse_rights(vec[2], &r, 1)) |
0126692c | 1290 | for(d = connections; d; d = d->next) |
1291 | if(!strcmp(d->who, vec[0])) | |
1292 | d->rights = r; | |
1293 | } | |
1294 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
834e7c4a | 1295 | } else { |
1296 | error(0, "%s attempted edituser but lacks required rights", c->who); | |
b4a80f69 | 1297 | sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n"); |
834e7c4a | 1298 | } |
f0feb22e RK |
1299 | return 1; |
1300 | } | |
1301 | ||
1302 | static int c_userinfo(struct conn *c, | |
1303 | char attribute((unused)) **vec, | |
1304 | int attribute((unused)) nvec) { | |
5df73aeb RK |
1305 | struct kvp *k; |
1306 | const char *value; | |
eb5dc014 | 1307 | |
39e7dcfb RK |
1308 | /* We allow remote querying of rights so that clients can figure out what |
1309 | * they're allowed to do */ | |
1310 | if(!config->remote_userman | |
1311 | && !(c->rights & RIGHT__LOCAL) | |
1312 | && strcmp(vec[1], "rights")) { | |
1313 | error(0, "S%x: remote userinfo %s %s", c->tag, vec[0], vec[1]); | |
810b8083 RK |
1314 | sink_writes(ev_writer_sink(c->w), "550 Remote user management is disabled\n"); |
1315 | return 1; | |
1316 | } | |
eb5dc014 | 1317 | /* RIGHT_ADMIN allows anything; otherwise you can only get your own email |
29f5fbd2 | 1318 | * address and rights list. */ |
eb5dc014 | 1319 | if((c->rights & RIGHT_ADMIN) |
5df73aeb RK |
1320 | || (!strcmp(c->who, vec[0]) |
1321 | && (!strcmp(vec[1], "email") | |
1322 | || !strcmp(vec[1], "rights")))) { | |
1323 | if((k = trackdb_getuserinfo(vec[0]))) | |
1324 | if((value = kvp_get(k, vec[1]))) | |
1325 | sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(value)); | |
1326 | else | |
1327 | sink_writes(ev_writer_sink(c->w), "555 Not set\n"); | |
1328 | else | |
1329 | sink_writes(ev_writer_sink(c->w), "550 No such user\n"); | |
834e7c4a | 1330 | } else { |
1331 | error(0, "%s attempted userinfo but lacks required rights", c->who); | |
b4a80f69 | 1332 | sink_writes(ev_writer_sink(c->w), "510 Restricted to administrators\n"); |
834e7c4a | 1333 | } |
f0feb22e RK |
1334 | return 1; |
1335 | } | |
1336 | ||
c3be4f19 RK |
1337 | static int c_users(struct conn *c, |
1338 | char attribute((unused)) **vec, | |
1339 | int attribute((unused)) nvec) { | |
1340 | /* TODO de-dupe with c_tags */ | |
1341 | char **users = trackdb_listusers(); | |
1342 | ||
1343 | sink_writes(ev_writer_sink(c->w), "253 User list follows\n"); | |
1344 | while(*users) { | |
1345 | sink_printf(ev_writer_sink(c->w), "%s%s\n", | |
1346 | **users == '.' ? "." : "", *users); | |
1347 | ++users; | |
1348 | } | |
1349 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
1350 | return 1; /* completed */ | |
1351 | } | |
1352 | ||
86e3aea7 | 1353 | /** @brief Base64 mapping table for confirmation strings |
1354 | * | |
1355 | * This is used with generic_to_base64() and generic_base64(). We cannot use | |
1356 | * the MIME table as that contains '+' and '=' which get quoted when | |
1357 | * URL-encoding. (The CGI still does the URL encoding but it is desirable to | |
1358 | * avoid it being necessary.) | |
1359 | */ | |
1360 | static const char confirm_base64_table[] = | |
1361 | "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789/.*"; | |
1362 | ||
ba39faf6 RK |
1363 | static int c_register(struct conn *c, |
1364 | char **vec, | |
1365 | int attribute((unused)) nvec) { | |
1366 | char *buf, *cs; | |
1367 | size_t bufsize; | |
1368 | int offset; | |
1369 | ||
1370 | /* The confirmation string is base64(username;nonce) */ | |
10114017 | 1371 | bufsize = strlen(vec[0]) + CONFIRM_SIZE + 2; |
ba39faf6 RK |
1372 | buf = xmalloc_noptr(bufsize); |
1373 | offset = byte_snprintf(buf, bufsize, "%s;", vec[0]); | |
10114017 | 1374 | gcry_randomize(buf + offset, CONFIRM_SIZE, GCRY_STRONG_RANDOM); |
86e3aea7 | 1375 | cs = generic_to_base64((uint8_t *)buf, offset + CONFIRM_SIZE, |
1376 | confirm_base64_table); | |
ba39faf6 RK |
1377 | if(trackdb_adduser(vec[0], vec[1], config->default_rights, vec[2], cs)) |
1378 | sink_writes(ev_writer_sink(c->w), "550 Cannot create user\n"); | |
1379 | else | |
1380 | sink_printf(ev_writer_sink(c->w), "252 %s\n", quoteutf8(cs)); | |
1381 | return 1; | |
1382 | } | |
1383 | ||
1384 | static int c_confirm(struct conn *c, | |
1385 | char **vec, | |
1386 | int attribute((unused)) nvec) { | |
1387 | size_t nuser; | |
1388 | char *user, *sep; | |
30365519 | 1389 | rights_type rights; |
1390 | const char *host; | |
ba39faf6 | 1391 | |
30365519 | 1392 | /* Get some kind of peer identifcation */ |
1393 | if(!(host = connection_host(c))) { | |
1394 | sink_writes(ev_writer_sink(c->w), "530 Authentication failure\n"); | |
1395 | return 1; | |
1396 | } | |
86e3aea7 | 1397 | if(!(user = generic_base64(vec[0], &nuser, confirm_base64_table)) |
ba39faf6 RK |
1398 | || !(sep = memchr(user, ';', nuser))) { |
1399 | sink_writes(ev_writer_sink(c->w), "550 Malformed confirmation string\n"); | |
1400 | return 1; | |
1401 | } | |
1402 | *sep = 0; | |
30365519 | 1403 | if(trackdb_confirm(user, vec[0], &rights)) |
ba39faf6 | 1404 | sink_writes(ev_writer_sink(c->w), "550 Incorrect confirmation string\n"); |
30365519 | 1405 | else { |
1406 | c->who = user; | |
1407 | c->cookie = 0; | |
1408 | c->rights = rights; | |
1409 | if(strcmp(host, "local")) | |
1410 | info("S%x %s confirmed from %s", c->tag, user, host); | |
1411 | else | |
1412 | c->rights |= RIGHT__LOCAL; | |
1413 | /* Response contains username so client knows who they are acting as */ | |
1414 | sink_printf(ev_writer_sink(c->w), "232 %s\n", quoteutf8(user)); | |
1415 | } | |
ba39faf6 RK |
1416 | return 1; |
1417 | } | |
6207d2f3 | 1418 | |
1419 | static int sent_reminder(ev_source attribute((unused)) *ev, | |
1420 | pid_t attribute((unused)) pid, | |
1421 | int status, | |
1422 | const struct rusage attribute((unused)) *rusage, | |
1423 | void *u) { | |
1424 | struct conn *const c = u; | |
1425 | ||
1426 | /* Tell the client what went down */ | |
1427 | if(!status) { | |
1428 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
1429 | } else { | |
1430 | error(0, "reminder subprocess %s", wstat(status)); | |
1431 | sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n"); | |
1432 | } | |
1433 | /* Re-enable this connection */ | |
1434 | ev_reader_enable(c->r); | |
1435 | return 0; | |
1436 | } | |
1437 | ||
1438 | static int c_reminder(struct conn *c, | |
1439 | char **vec, | |
1440 | int attribute((unused)) nvec) { | |
1441 | struct kvp *k; | |
1442 | const char *password, *email, *text, *encoding, *charset, *content_type; | |
1443 | const time_t *last; | |
1444 | time_t now; | |
1445 | pid_t pid; | |
1446 | ||
1447 | static hash *last_reminder; | |
1448 | ||
1449 | if(!config->mail_sender) { | |
1450 | error(0, "cannot send password reminders because mail_sender not set"); | |
1451 | sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n"); | |
1452 | return 1; | |
1453 | } | |
1454 | if(!(k = trackdb_getuserinfo(vec[0]))) { | |
1455 | error(0, "reminder for user '%s' who does not exist", vec[0]); | |
1456 | sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n"); | |
1457 | return 1; | |
1458 | } | |
1459 | if(!(email = kvp_get(k, "email")) | |
1460 | || !strchr(email, '@')) { | |
1461 | error(0, "user '%s' has no valid email address", vec[0]); | |
1462 | sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n"); | |
1463 | return 1; | |
1464 | } | |
1465 | if(!(password = kvp_get(k, "password")) | |
1466 | || !*password) { | |
1467 | error(0, "user '%s' has no password", vec[0]); | |
1468 | sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n"); | |
1469 | return 1; | |
1470 | } | |
1471 | /* Rate-limit reminders. This hash is bounded in size by the number of | |
1472 | * users. If this is actually a problem for anyone then we can periodically | |
1473 | * clean it. */ | |
1474 | if(!last_reminder) | |
1475 | last_reminder = hash_new(sizeof (time_t)); | |
1476 | last = hash_find(last_reminder, vec[0]); | |
1477 | time(&now); | |
1478 | if(last && now < *last + config->reminder_interval) { | |
1479 | error(0, "sent a password reminder to '%s' too recently", vec[0]); | |
1480 | sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n"); | |
1481 | return 1; | |
1482 | } | |
1483 | /* Send the reminder */ | |
1484 | /* TODO this should be templatized and to some extent merged with | |
1485 | * the code in act_register() */ | |
1486 | byte_xasprintf((char **)&text, | |
1487 | "Someone requested that you be sent a reminder of your DisOrder password.\n" | |
1488 | "Your password is:\n" | |
1489 | "\n" | |
1490 | " %s\n", password); | |
1491 | if(!(text = mime_encode_text(text, &charset, &encoding))) | |
1492 | fatal(0, "cannot encode email"); | |
1493 | byte_xasprintf((char **)&content_type, "text/plain;charset=%s", | |
1494 | quote822(charset, 0)); | |
1495 | pid = sendmail_subprocess("", config->mail_sender, email, | |
1496 | "DisOrder password reminder", | |
1497 | encoding, content_type, text); | |
1498 | if(pid < 0) { | |
1499 | sink_writes(ev_writer_sink(c->w), "550 Cannot send a reminder email\n"); | |
1500 | return 1; | |
1501 | } | |
1502 | hash_add(last_reminder, vec[0], &now, HASH_INSERT_OR_REPLACE); | |
1503 | info("sending a passsword reminder to user '%s'", vec[0]); | |
1504 | /* We can only continue when the subprocess finishes */ | |
1505 | ev_child(c->ev, pid, 0, sent_reminder, c); | |
1506 | return 0; | |
1507 | } | |
1508 | ||
460b9539 | 1509 | static const struct command { |
eb5dc014 | 1510 | /** @brief Command name */ |
460b9539 | 1511 | const char *name; |
eb5dc014 RK |
1512 | |
1513 | /** @brief Minimum number of arguments */ | |
1514 | int minargs; | |
1515 | ||
1516 | /** @brief Maximum number of arguments */ | |
1517 | int maxargs; | |
1518 | ||
1519 | /** @brief Function to process command */ | |
460b9539 | 1520 | int (*fn)(struct conn *, char **, int); |
eb5dc014 RK |
1521 | |
1522 | /** @brief Rights required to execute command | |
1523 | * | |
1524 | * 0 means that the command can be issued without logging in. If multiple | |
1525 | * bits are listed here any of those rights will do. | |
1526 | */ | |
1527 | rights_type rights; | |
460b9539 | 1528 | } commands[] = { |
0f55e905 | 1529 | { "adduser", 2, 3, c_adduser, RIGHT_ADMIN|RIGHT__LOCAL }, |
eb5dc014 | 1530 | { "allfiles", 0, 2, c_allfiles, RIGHT_READ }, |
ba39faf6 | 1531 | { "confirm", 1, 1, c_confirm, 0 }, |
b12be54a | 1532 | { "cookie", 1, 1, c_cookie, 0 }, |
eb5dc014 RK |
1533 | { "deluser", 1, 1, c_deluser, RIGHT_ADMIN|RIGHT__LOCAL }, |
1534 | { "dirs", 0, 2, c_dirs, RIGHT_READ }, | |
1535 | { "disable", 0, 1, c_disable, RIGHT_GLOBAL_PREFS }, | |
1536 | { "edituser", 3, 3, c_edituser, RIGHT_ADMIN|RIGHT_USERINFO }, | |
1537 | { "enable", 0, 0, c_enable, RIGHT_GLOBAL_PREFS }, | |
1538 | { "enabled", 0, 0, c_enabled, RIGHT_READ }, | |
1539 | { "exists", 1, 1, c_exists, RIGHT_READ }, | |
1540 | { "files", 0, 2, c_files, RIGHT_READ }, | |
1541 | { "get", 2, 2, c_get, RIGHT_READ }, | |
1542 | { "get-global", 1, 1, c_get_global, RIGHT_READ }, | |
1543 | { "length", 1, 1, c_length, RIGHT_READ }, | |
1544 | { "log", 0, 0, c_log, RIGHT_READ }, | |
1545 | { "make-cookie", 0, 0, c_make_cookie, RIGHT_READ }, | |
1546 | { "move", 2, 2, c_move, RIGHT_MOVE__MASK }, | |
1547 | { "moveafter", 1, INT_MAX, c_moveafter, RIGHT_MOVE__MASK }, | |
1548 | { "new", 0, 1, c_new, RIGHT_READ }, | |
1549 | { "nop", 0, 0, c_nop, 0 }, | |
1550 | { "part", 3, 3, c_part, RIGHT_READ }, | |
1551 | { "pause", 0, 0, c_pause, RIGHT_PAUSE }, | |
1552 | { "play", 1, 1, c_play, RIGHT_PLAY }, | |
1553 | { "playing", 0, 0, c_playing, RIGHT_READ }, | |
1554 | { "prefs", 1, 1, c_prefs, RIGHT_READ }, | |
1555 | { "queue", 0, 0, c_queue, RIGHT_READ }, | |
1556 | { "random-disable", 0, 0, c_random_disable, RIGHT_GLOBAL_PREFS }, | |
1557 | { "random-enable", 0, 0, c_random_enable, RIGHT_GLOBAL_PREFS }, | |
1558 | { "random-enabled", 0, 0, c_random_enabled, RIGHT_READ }, | |
1559 | { "recent", 0, 0, c_recent, RIGHT_READ }, | |
1560 | { "reconfigure", 0, 0, c_reconfigure, RIGHT_ADMIN }, | |
ba39faf6 | 1561 | { "register", 3, 3, c_register, RIGHT_REGISTER|RIGHT__LOCAL }, |
6207d2f3 | 1562 | { "reminder", 1, 1, c_reminder, RIGHT__LOCAL }, |
eb5dc014 | 1563 | { "remove", 1, 1, c_remove, RIGHT_REMOVE__MASK }, |
dd9af5cb | 1564 | { "rescan", 0, INT_MAX, c_rescan, RIGHT_RESCAN }, |
eb5dc014 RK |
1565 | { "resolve", 1, 1, c_resolve, RIGHT_READ }, |
1566 | { "resume", 0, 0, c_resume, RIGHT_PAUSE }, | |
1567 | { "revoke", 0, 0, c_revoke, RIGHT_READ }, | |
1568 | { "rtp-address", 0, 0, c_rtp_address, 0 }, | |
1569 | { "scratch", 0, 1, c_scratch, RIGHT_SCRATCH__MASK }, | |
1570 | { "search", 1, 1, c_search, RIGHT_READ }, | |
1571 | { "set", 3, 3, c_set, RIGHT_PREFS, }, | |
1572 | { "set-global", 2, 2, c_set_global, RIGHT_GLOBAL_PREFS }, | |
1573 | { "shutdown", 0, 0, c_shutdown, RIGHT_ADMIN }, | |
1574 | { "stats", 0, 0, c_stats, RIGHT_READ }, | |
1575 | { "tags", 0, 0, c_tags, RIGHT_READ }, | |
1576 | { "unset", 2, 2, c_set, RIGHT_PREFS }, | |
1577 | { "unset-global", 1, 1, c_set_global, RIGHT_GLOBAL_PREFS }, | |
460b9539 | 1578 | { "user", 2, 2, c_user, 0 }, |
eb5dc014 RK |
1579 | { "userinfo", 2, 2, c_userinfo, RIGHT_READ }, |
1580 | { "users", 0, 0, c_users, RIGHT_READ }, | |
1581 | { "version", 0, 0, c_version, RIGHT_READ }, | |
1582 | { "volume", 0, 2, c_volume, RIGHT_READ|RIGHT_VOLUME } | |
460b9539 | 1583 | }; |
1584 | ||
1585 | static void command_error(const char *msg, void *u) { | |
1586 | struct conn *c = u; | |
1587 | ||
1588 | sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg); | |
1589 | } | |
1590 | ||
1591 | /* process a command. Return 1 if complete, 0 if incomplete. */ | |
1592 | static int command(struct conn *c, char *line) { | |
1593 | char **vec; | |
1594 | int nvec, n; | |
1595 | ||
1596 | D(("server command %s", line)); | |
f9635e06 RK |
1597 | /* We force everything into NFC as early as possible */ |
1598 | if(!(line = utf8_compose_canon(line, strlen(line), 0))) { | |
1599 | sink_writes(ev_writer_sink(c->w), "500 cannot normalize command\n"); | |
1600 | return 1; | |
1601 | } | |
460b9539 | 1602 | if(!(vec = split(line, &nvec, SPLIT_QUOTES, command_error, c))) { |
1603 | sink_writes(ev_writer_sink(c->w), "500 cannot parse command\n"); | |
1604 | return 1; | |
1605 | } | |
1606 | if(nvec == 0) { | |
1607 | sink_writes(ev_writer_sink(c->w), "500 do what?\n"); | |
1608 | return 1; | |
1609 | } | |
1610 | if((n = TABLE_FIND(commands, struct command, name, vec[0])) < 0) | |
1611 | sink_writes(ev_writer_sink(c->w), "500 unknown command\n"); | |
1612 | else { | |
eb5dc014 RK |
1613 | if(commands[n].rights |
1614 | && !(c->rights & commands[n].rights)) { | |
834e7c4a | 1615 | error(0, "%s attempted %s but lacks required rights", c->who ? c->who : "NULL", |
1616 | commands[n].name); | |
b4a80f69 | 1617 | sink_writes(ev_writer_sink(c->w), "510 Prohibited\n"); |
460b9539 | 1618 | return 1; |
1619 | } | |
1620 | ++vec; | |
1621 | --nvec; | |
1622 | if(nvec < commands[n].minargs) { | |
1623 | sink_writes(ev_writer_sink(c->w), "500 missing argument(s)\n"); | |
1624 | return 1; | |
1625 | } | |
1626 | if(nvec > commands[n].maxargs) { | |
1627 | sink_writes(ev_writer_sink(c->w), "500 too many arguments\n"); | |
1628 | return 1; | |
1629 | } | |
1630 | return commands[n].fn(c, vec, nvec); | |
1631 | } | |
1632 | return 1; /* completed */ | |
1633 | } | |
1634 | ||
1635 | /* redirect to the right reader callback for our current state */ | |
1636 | static int redirect_reader_callback(ev_source *ev, | |
1637 | ev_reader *reader, | |
460b9539 | 1638 | void *ptr, |
1639 | size_t bytes, | |
1640 | int eof, | |
1641 | void *u) { | |
1642 | struct conn *c = u; | |
1643 | ||
75d64210 | 1644 | return c->reader(ev, reader, ptr, bytes, eof, u); |
460b9539 | 1645 | } |
1646 | ||
1647 | /* the main command reader */ | |
1648 | static int reader_callback(ev_source attribute((unused)) *ev, | |
1649 | ev_reader *reader, | |
460b9539 | 1650 | void *ptr, |
1651 | size_t bytes, | |
1652 | int eof, | |
1653 | void *u) { | |
1654 | struct conn *c = u; | |
1655 | char *eol; | |
1656 | int complete; | |
1657 | ||
1658 | D(("server reader_callback")); | |
1659 | while((eol = memchr(ptr, '\n', bytes))) { | |
1660 | *eol++ = 0; | |
1661 | ev_reader_consume(reader, eol - (char *)ptr); | |
1662 | complete = command(c, ptr); | |
1663 | bytes -= (eol - (char *)ptr); | |
1664 | ptr = eol; | |
1665 | if(!complete) { | |
1666 | /* the command had better have set a new reader callback */ | |
1667 | if(bytes || eof) | |
1668 | /* there are further bytes to read, or we are at eof; arrange for the | |
1669 | * command's reader callback to handle them */ | |
1670 | return ev_reader_incomplete(reader); | |
1671 | /* nothing's going on right now */ | |
1672 | return 0; | |
1673 | } | |
1674 | /* command completed, we can go around and handle the next one */ | |
1675 | } | |
1676 | if(eof) { | |
1677 | if(bytes) | |
1678 | error(0, "S%x unterminated line", c->tag); | |
8d8b8c1f | 1679 | D(("normal reader close")); |
397ef7bb RK |
1680 | c->r = 0; |
1681 | if(c->w) { | |
8d8b8c1f | 1682 | D(("close associated writer")); |
397ef7bb RK |
1683 | ev_writer_close(c->w); |
1684 | c->w = 0; | |
1685 | } | |
0126692c | 1686 | remove_connection(c); |
460b9539 | 1687 | } |
1688 | return 0; | |
1689 | } | |
1690 | ||
1691 | static int listen_callback(ev_source *ev, | |
1692 | int fd, | |
1693 | const struct sockaddr attribute((unused)) *remote, | |
1694 | socklen_t attribute((unused)) rlen, | |
1695 | void *u) { | |
1696 | const struct listener *l = u; | |
1697 | struct conn *c = xmalloc(sizeof *c); | |
1698 | static unsigned tags; | |
1699 | ||
1700 | D(("server listen_callback fd %d (%s)", fd, l->name)); | |
1701 | nonblock(fd); | |
1702 | cloexec(fd); | |
1703 | c->tag = tags++; | |
1704 | c->ev = ev; | |
e8c92ba7 RK |
1705 | c->w = ev_writer_new(ev, fd, writer_error, c, |
1706 | "client writer"); | |
1707 | c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c, | |
1708 | "client reader"); | |
75d64210 | 1709 | ev_tie(c->r, c->w); |
460b9539 | 1710 | c->fd = fd; |
1711 | c->reader = reader_callback; | |
1712 | c->l = l; | |
eb5dc014 | 1713 | c->rights = 0; |
460b9539 | 1714 | gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM); |
7b32e917 RK |
1715 | sink_printf(ev_writer_sink(c->w), "231 %d %s %s\n", |
1716 | 2, | |
b3141726 RK |
1717 | config->authorization_algorithm, |
1718 | hex(c->nonce, sizeof c->nonce)); | |
460b9539 | 1719 | return 0; |
1720 | } | |
1721 | ||
1722 | int server_start(ev_source *ev, int pf, | |
1723 | size_t socklen, const struct sockaddr *sa, | |
1724 | const char *name) { | |
1725 | int fd; | |
1726 | struct listener *l = xmalloc(sizeof *l); | |
1727 | static const int one = 1; | |
1728 | ||
1729 | D(("server_init socket %s", name)); | |
1730 | fd = xsocket(pf, SOCK_STREAM, 0); | |
1731 | xsetsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one); | |
1732 | if(bind(fd, sa, socklen) < 0) { | |
1733 | error(errno, "error binding to %s", name); | |
1734 | return -1; | |
1735 | } | |
1736 | xlisten(fd, 128); | |
1737 | nonblock(fd); | |
1738 | cloexec(fd); | |
1739 | l->name = name; | |
1740 | l->pf = pf; | |
e8c92ba7 RK |
1741 | if(ev_listen(ev, fd, listen_callback, l, "server listener")) |
1742 | exit(EXIT_FAILURE); | |
460b9539 | 1743 | return fd; |
1744 | } | |
1745 | ||
1746 | int server_stop(ev_source *ev, int fd) { | |
1747 | xclose(fd); | |
1748 | return ev_listen_cancel(ev, fd); | |
1749 | } | |
1750 | ||
1751 | /* | |
1752 | Local Variables: | |
1753 | c-basic-offset:2 | |
1754 | comment-column:40 | |
1755 | fill-column:79 | |
1756 | End: | |
1757 | */ |