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