Commit | Line | Data |
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460b9539 | 1 | /* |
2 | * This file is part of DisOrder. | |
768d7355 | 3 | * Copyright (C) 2004, 2005, 2006, 2007 Richard Kettlewell |
460b9539 | 4 | * |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
11 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | * General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
18 | * USA | |
19 | */ | |
20 | ||
21 | #include <config.h> | |
22 | #include "types.h" | |
23 | ||
24 | #include <pwd.h> | |
25 | #include <sys/types.h> | |
26 | #include <sys/socket.h> | |
27 | #include <sys/time.h> | |
28 | #include <unistd.h> | |
29 | #include <stdlib.h> | |
30 | #include <string.h> | |
31 | #include <errno.h> | |
32 | #include <fcntl.h> | |
33 | #include <gcrypt.h> | |
34 | #include <stddef.h> | |
35 | #include <time.h> | |
36 | #include <limits.h> | |
37 | #include <pcre.h> | |
38 | #include <netdb.h> | |
39 | #include <netinet/in.h> | |
40 | ||
41 | #include "event.h" | |
42 | #include "server.h" | |
43 | #include "syscalls.h" | |
44 | #include "queue.h" | |
f08c0859 | 45 | #include "server-queue.h" |
460b9539 | 46 | #include "play.h" |
47 | #include "log.h" | |
48 | #include "mem.h" | |
49 | #include "state.h" | |
50 | #include "charset.h" | |
51 | #include "split.h" | |
52 | #include "configuration.h" | |
53 | #include "hex.h" | |
54 | #include "trackdb.h" | |
55 | #include "table.h" | |
56 | #include "kvp.h" | |
57 | #include "mixer.h" | |
58 | #include "sink.h" | |
59 | #include "authhash.h" | |
60 | #include "plugin.h" | |
61 | #include "printf.h" | |
62 | #include "trackname.h" | |
63 | #include "eventlog.h" | |
64 | #include "defs.h" | |
65 | #include "cache.h" | |
f9635e06 | 66 | #include "unicode.h" |
460b9539 | 67 | |
68 | #ifndef NONCE_SIZE | |
69 | # define NONCE_SIZE 16 | |
70 | #endif | |
71 | ||
72 | int volume_left, volume_right; /* last known volume */ | |
73 | ||
18e6d6e6 | 74 | /** @brief Accept all well-formed login attempts |
75 | * | |
76 | * Used in debugging. | |
77 | */ | |
78 | int wideopen; | |
79 | ||
460b9539 | 80 | struct listener { |
81 | const char *name; | |
82 | int pf; | |
83 | }; | |
84 | ||
397ef7bb | 85 | /** @brief One client connection */ |
460b9539 | 86 | struct conn { |
397ef7bb | 87 | /** @brief Read commands from here */ |
460b9539 | 88 | ev_reader *r; |
397ef7bb | 89 | /** @brief Send responses to here */ |
460b9539 | 90 | ev_writer *w; |
397ef7bb | 91 | /** @brief Underlying file descriptor */ |
460b9539 | 92 | int fd; |
397ef7bb | 93 | /** @brief Unique identifier for connection used in log messages */ |
460b9539 | 94 | unsigned tag; |
397ef7bb | 95 | /** @brief Login name or NULL */ |
460b9539 | 96 | char *who; |
397ef7bb | 97 | /** @brief Event loop */ |
460b9539 | 98 | ev_source *ev; |
397ef7bb | 99 | /** @brief Nonce chosen for this connection */ |
460b9539 | 100 | unsigned char nonce[NONCE_SIZE]; |
397ef7bb RK |
101 | /** @brief Current reader callback |
102 | * | |
103 | * We change this depending on whether we're servicing the @b log command | |
104 | */ | |
460b9539 | 105 | ev_reader_callback *reader; |
397ef7bb | 106 | /** @brief Event log output sending to this connection */ |
460b9539 | 107 | struct eventlog_output *lo; |
397ef7bb | 108 | /** @brief Parent listener */ |
460b9539 | 109 | const struct listener *l; |
110 | }; | |
111 | ||
112 | static int reader_callback(ev_source *ev, | |
113 | ev_reader *reader, | |
460b9539 | 114 | void *ptr, |
115 | size_t bytes, | |
116 | int eof, | |
117 | void *u); | |
118 | ||
119 | static const char *noyes[] = { "no", "yes" }; | |
120 | ||
397ef7bb RK |
121 | /** @brief Called when a connection's writer fails or is shut down |
122 | * | |
123 | * If the connection still has a raeder that is cancelled. | |
124 | */ | |
460b9539 | 125 | static int writer_error(ev_source attribute((unused)) *ev, |
460b9539 | 126 | int errno_value, |
127 | void *u) { | |
128 | struct conn *c = u; | |
129 | ||
8d8b8c1f | 130 | D(("server writer_error S%x %d", c->tag, errno_value)); |
460b9539 | 131 | if(errno_value == 0) { |
132 | /* writer is done */ | |
8d8b8c1f | 133 | D(("S%x writer completed", c->tag)); |
460b9539 | 134 | } else { |
135 | if(errno_value != EPIPE) | |
136 | error(errno_value, "S%x write error on socket", c->tag); | |
38b8221f | 137 | if(c->r) { |
8d8b8c1f | 138 | D(("cancel reader")); |
38b8221f RK |
139 | ev_reader_cancel(c->r); |
140 | c->r = 0; | |
141 | } | |
8d8b8c1f | 142 | D(("done cancel reader")); |
460b9539 | 143 | } |
38b8221f | 144 | c->w = 0; |
75d64210 | 145 | ev_report(ev); |
460b9539 | 146 | return 0; |
147 | } | |
148 | ||
397ef7bb RK |
149 | /** @brief Called when a conncetion's reader fails or is shut down |
150 | * | |
151 | * If connection still has a writer then it is closed. | |
152 | */ | |
460b9539 | 153 | static int reader_error(ev_source attribute((unused)) *ev, |
460b9539 | 154 | int errno_value, |
155 | void *u) { | |
156 | struct conn *c = u; | |
157 | ||
8d8b8c1f | 158 | D(("server reader_error S%x %d", c->tag, errno_value)); |
1563f6f6 | 159 | error(errno_value, "S%x read error on socket", c->tag); |
38b8221f RK |
160 | if(c->w) |
161 | ev_writer_close(c->w); | |
162 | c->w = 0; | |
163 | c->r = 0; | |
768d7355 | 164 | ev_report(ev); |
460b9539 | 165 | return 0; |
166 | } | |
167 | ||
397ef7bb | 168 | /** @brief Return true if we are talking to a trusted user */ |
460b9539 | 169 | static int trusted(struct conn *c) { |
170 | int n; | |
171 | ||
172 | for(n = 0; (n < config->trust.n | |
173 | && strcmp(config->trust.s[n], c->who)); ++n) | |
174 | ; | |
175 | return n < config->trust.n; | |
176 | } | |
177 | ||
178 | static int c_disable(struct conn *c, char **vec, int nvec) { | |
179 | if(nvec == 0) | |
180 | disable_playing(c->who); | |
181 | else if(nvec == 1 && !strcmp(vec[0], "now")) | |
182 | disable_playing(c->who); | |
183 | else { | |
184 | sink_writes(ev_writer_sink(c->w), "550 invalid argument\n"); | |
185 | return 1; /* completed */ | |
186 | } | |
187 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
188 | return 1; /* completed */ | |
189 | } | |
190 | ||
191 | static int c_enable(struct conn *c, | |
192 | char attribute((unused)) **vec, | |
193 | int attribute((unused)) nvec) { | |
194 | enable_playing(c->who, c->ev); | |
195 | /* Enable implicitly unpauses if there is nothing playing */ | |
196 | if(paused && !playing) resume_playing(c->who); | |
197 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
198 | return 1; /* completed */ | |
199 | } | |
200 | ||
201 | static int c_enabled(struct conn *c, | |
202 | char attribute((unused)) **vec, | |
203 | int attribute((unused)) nvec) { | |
204 | sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[playing_is_enabled()]); | |
205 | return 1; /* completed */ | |
206 | } | |
207 | ||
208 | static int c_play(struct conn *c, char **vec, | |
209 | int attribute((unused)) nvec) { | |
210 | const char *track; | |
211 | struct queue_entry *q; | |
212 | ||
213 | if(!trackdb_exists(vec[0])) { | |
214 | sink_writes(ev_writer_sink(c->w), "550 track is not in database\n"); | |
215 | return 1; | |
216 | } | |
217 | if(!(track = trackdb_resolve(vec[0]))) { | |
218 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
219 | return 1; | |
220 | } | |
221 | q = queue_add(track, c->who, WHERE_BEFORE_RANDOM); | |
222 | queue_write(); | |
223 | /* If we added the first track, and something is playing, then prepare the | |
224 | * new track. If nothing is playing then we don't bother as it wouldn't gain | |
225 | * anything. */ | |
226 | if(q == qhead.next && playing) | |
227 | prepare(c->ev, q); | |
228 | sink_writes(ev_writer_sink(c->w), "250 queued\n"); | |
229 | /* If the queue was empty but we are for some reason paused then | |
230 | * unpause. */ | |
231 | if(!playing) resume_playing(0); | |
232 | play(c->ev); | |
233 | return 1; /* completed */ | |
234 | } | |
235 | ||
236 | static int c_remove(struct conn *c, char **vec, | |
237 | int attribute((unused)) nvec) { | |
238 | struct queue_entry *q; | |
239 | ||
240 | if(!(q = queue_find(vec[0]))) { | |
241 | sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n"); | |
242 | return 1; | |
243 | } | |
244 | if(config->restrictions & RESTRICT_REMOVE) { | |
245 | /* can only remove tracks that you submitted */ | |
246 | if(!q->submitter || strcmp(q->submitter, c->who)) { | |
247 | sink_writes(ev_writer_sink(c->w), "550 you didn't submit that track!\n"); | |
248 | return 1; | |
249 | } | |
250 | } | |
251 | queue_remove(q, c->who); | |
252 | /* De-prepare the track. */ | |
253 | abandon(c->ev, q); | |
254 | /* If we removed the random track then add another one. */ | |
255 | if(q->state == playing_random) | |
256 | add_random_track(); | |
257 | /* Prepare whatever the next head track is. */ | |
258 | if(qhead.next != &qhead) | |
259 | prepare(c->ev, qhead.next); | |
260 | queue_write(); | |
261 | sink_writes(ev_writer_sink(c->w), "250 removed\n"); | |
262 | return 1; /* completed */ | |
263 | } | |
264 | ||
265 | static int c_scratch(struct conn *c, | |
266 | char **vec, | |
267 | int nvec) { | |
268 | if(!playing) { | |
269 | sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n"); | |
270 | return 1; /* completed */ | |
271 | } | |
272 | if(config->restrictions & RESTRICT_SCRATCH) { | |
273 | /* can only scratch tracks you submitted and randomly selected ones */ | |
274 | if(playing->submitter && strcmp(playing->submitter, c->who)) { | |
275 | sink_writes(ev_writer_sink(c->w), "550 you didn't submit that track!\n"); | |
276 | return 1; | |
277 | } | |
278 | } | |
279 | scratch(c->who, nvec == 1 ? vec[0] : 0); | |
280 | /* If you scratch an unpaused track then it is automatically unpaused */ | |
281 | resume_playing(0); | |
282 | sink_writes(ev_writer_sink(c->w), "250 scratched\n"); | |
283 | return 1; /* completed */ | |
284 | } | |
285 | ||
286 | static int c_pause(struct conn *c, | |
287 | char attribute((unused)) **vec, | |
288 | int attribute((unused)) nvec) { | |
289 | if(!playing) { | |
290 | sink_writes(ev_writer_sink(c->w), "250 nothing is playing\n"); | |
291 | return 1; /* completed */ | |
292 | } | |
293 | if(paused) { | |
294 | sink_writes(ev_writer_sink(c->w), "250 already paused\n"); | |
295 | return 1; /* completed */ | |
296 | } | |
297 | if(pause_playing(c->who) < 0) | |
298 | sink_writes(ev_writer_sink(c->w), "550 cannot pause this track\n"); | |
299 | else | |
300 | sink_writes(ev_writer_sink(c->w), "250 paused\n"); | |
301 | return 1; | |
302 | } | |
303 | ||
304 | static int c_resume(struct conn *c, | |
305 | char attribute((unused)) **vec, | |
306 | int attribute((unused)) nvec) { | |
307 | if(!paused) { | |
308 | sink_writes(ev_writer_sink(c->w), "250 not paused\n"); | |
309 | return 1; /* completed */ | |
310 | } | |
311 | resume_playing(c->who); | |
312 | sink_writes(ev_writer_sink(c->w), "250 paused\n"); | |
313 | return 1; | |
314 | } | |
315 | ||
316 | static int c_shutdown(struct conn *c, | |
317 | char attribute((unused)) **vec, | |
318 | int attribute((unused)) nvec) { | |
319 | info("S%x shut down by %s", c->tag, c->who); | |
320 | sink_writes(ev_writer_sink(c->w), "250 shutting down\n"); | |
321 | ev_writer_flush(c->w); | |
322 | quit(c->ev); | |
323 | } | |
324 | ||
325 | static int c_reconfigure(struct conn *c, | |
326 | char attribute((unused)) **vec, | |
327 | int attribute((unused)) nvec) { | |
328 | info("S%x reconfigure by %s", c->tag, c->who); | |
329 | if(reconfigure(c->ev, 1)) | |
330 | sink_writes(ev_writer_sink(c->w), "550 error reading new config\n"); | |
331 | else | |
332 | sink_writes(ev_writer_sink(c->w), "250 installed new config\n"); | |
333 | return 1; /* completed */ | |
334 | } | |
335 | ||
336 | static int c_rescan(struct conn *c, | |
337 | char attribute((unused)) **vec, | |
338 | int attribute((unused)) nvec) { | |
339 | info("S%x rescan by %s", c->tag, c->who); | |
340 | trackdb_rescan(c->ev); | |
341 | sink_writes(ev_writer_sink(c->w), "250 initiated rescan\n"); | |
342 | return 1; /* completed */ | |
343 | } | |
344 | ||
345 | static int c_version(struct conn *c, | |
346 | char attribute((unused)) **vec, | |
347 | int attribute((unused)) nvec) { | |
348 | /* VERSION had better only use the basic character set */ | |
349 | sink_printf(ev_writer_sink(c->w), "251 %s\n", disorder_version_string); | |
350 | return 1; /* completed */ | |
351 | } | |
352 | ||
353 | static int c_playing(struct conn *c, | |
354 | char attribute((unused)) **vec, | |
355 | int attribute((unused)) nvec) { | |
356 | if(playing) { | |
357 | queue_fix_sofar(playing); | |
358 | playing->expected = 0; | |
359 | sink_printf(ev_writer_sink(c->w), "252 %s\n", queue_marshall(playing)); | |
360 | } else | |
361 | sink_printf(ev_writer_sink(c->w), "259 nothing playing\n"); | |
362 | return 1; /* completed */ | |
363 | } | |
364 | ||
365 | static int c_become(struct conn *c, | |
366 | char **vec, | |
367 | int attribute((unused)) nvec) { | |
368 | c->who = vec[0]; | |
369 | sink_writes(ev_writer_sink(c->w), "230 OK\n"); | |
370 | return 1; | |
371 | } | |
372 | ||
373 | static int c_user(struct conn *c, | |
374 | char **vec, | |
375 | int attribute((unused)) nvec) { | |
376 | int n; | |
377 | const char *res; | |
378 | union { | |
379 | struct sockaddr sa; | |
380 | struct sockaddr_in in; | |
381 | struct sockaddr_in6 in6; | |
382 | } u; | |
383 | socklen_t l; | |
384 | char host[1024]; | |
385 | ||
386 | if(c->who) { | |
387 | sink_writes(ev_writer_sink(c->w), "530 already authenticated\n"); | |
388 | return 1; | |
389 | } | |
390 | /* get connection data */ | |
391 | l = sizeof u; | |
392 | if(getpeername(c->fd, &u.sa, &l) < 0) { | |
393 | error(errno, "S%x error calling getpeername", c->tag); | |
394 | sink_writes(ev_writer_sink(c->w), "530 authentication failure\n"); | |
395 | return 1; | |
396 | } | |
397 | if(c->l->pf != PF_UNIX) { | |
398 | if((n = getnameinfo(&u.sa, l, | |
399 | host, sizeof host, 0, 0, NI_NUMERICHOST))) { | |
400 | error(0, "S%x error calling getnameinfo: %s", c->tag, gai_strerror(n)); | |
401 | sink_writes(ev_writer_sink(c->w), "530 authentication failure\n"); | |
402 | return 1; | |
403 | } | |
18e6d6e6 | 404 | } else |
405 | strcpy(host, "local"); | |
460b9539 | 406 | /* find the user */ |
407 | for(n = 0; n < config->allow.n | |
408 | && strcmp(config->allow.s[n].s[0], vec[0]); ++n) | |
409 | ; | |
410 | /* if it's a real user check whether the response is right */ | |
18e6d6e6 | 411 | if(n >= config->allow.n) { |
412 | info("S%x unknown user '%s' from %s", c->tag, vec[0], host); | |
413 | sink_writes(ev_writer_sink(c->w), "530 authentication failed\n"); | |
414 | return 1; | |
415 | } | |
637fdea3 RK |
416 | res = authhash(c->nonce, sizeof c->nonce, config->allow.s[n].s[1], |
417 | config->authorization_algorithm); | |
18e6d6e6 | 418 | if(wideopen || (res && !strcmp(res, vec[1]))) { |
419 | c->who = vec[0]; | |
420 | /* currently we only bother logging remote connections */ | |
421 | if(c->l->pf != PF_UNIX) | |
422 | info("S%x %s connected from %s", c->tag, vec[0], host); | |
423 | sink_writes(ev_writer_sink(c->w), "230 OK\n"); | |
424 | return 1; | |
460b9539 | 425 | } |
426 | /* oops, response was wrong */ | |
18e6d6e6 | 427 | info("S%x authentication failure for %s from %s", c->tag, vec[0], host); |
460b9539 | 428 | sink_writes(ev_writer_sink(c->w), "530 authentication failed\n"); |
429 | return 1; | |
430 | } | |
431 | ||
432 | static int c_recent(struct conn *c, | |
433 | char attribute((unused)) **vec, | |
434 | int attribute((unused)) nvec) { | |
435 | const struct queue_entry *q; | |
436 | ||
437 | sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n"); | |
438 | for(q = phead.next; q != &phead; q = q->next) | |
439 | sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q)); | |
440 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
441 | return 1; /* completed */ | |
442 | } | |
443 | ||
444 | static int c_queue(struct conn *c, | |
445 | char attribute((unused)) **vec, | |
446 | int attribute((unused)) nvec) { | |
447 | struct queue_entry *q; | |
448 | time_t when = 0; | |
449 | const char *l; | |
450 | long length; | |
451 | ||
452 | sink_writes(ev_writer_sink(c->w), "253 Tracks follow\n"); | |
453 | if(playing_is_enabled() && !paused) { | |
454 | if(playing) { | |
455 | queue_fix_sofar(playing); | |
456 | if((l = trackdb_get(playing->track, "_length")) | |
457 | && (length = atol(l))) { | |
458 | time(&when); | |
459 | when += length - playing->sofar + config->gap; | |
460 | } | |
461 | } else | |
462 | /* Nothing is playing but playing is enabled, so whatever is | |
463 | * first in the queue can be expected to start immediately. */ | |
464 | time(&when); | |
465 | } | |
466 | for(q = qhead.next; q != &qhead; q = q->next) { | |
467 | /* fill in estimated start time */ | |
468 | q->expected = when; | |
469 | sink_printf(ev_writer_sink(c->w), " %s\n", queue_marshall(q)); | |
470 | /* update for next track */ | |
471 | if(when) { | |
472 | if((l = trackdb_get(q->track, "_length")) | |
473 | && (length = atol(l))) | |
474 | when += length + config->gap; | |
475 | else | |
476 | when = 0; | |
477 | } | |
478 | } | |
479 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
480 | return 1; /* completed */ | |
481 | } | |
482 | ||
483 | static int output_list(struct conn *c, char **vec) { | |
484 | while(*vec) | |
485 | sink_printf(ev_writer_sink(c->w), "%s\n", *vec++); | |
486 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
487 | return 1; | |
488 | } | |
489 | ||
490 | static int files_dirs(struct conn *c, | |
491 | char **vec, | |
492 | int nvec, | |
493 | enum trackdb_listable what) { | |
494 | const char *dir, *re, *errstr; | |
495 | int erroffset; | |
496 | pcre *rec; | |
497 | char **fvec, *key; | |
498 | ||
499 | switch(nvec) { | |
500 | case 0: dir = 0; re = 0; break; | |
501 | case 1: dir = vec[0]; re = 0; break; | |
502 | case 2: dir = vec[0]; re = vec[1]; break; | |
503 | default: abort(); | |
504 | } | |
505 | /* A bit of a bodge to make sure the args don't trample on cache keys */ | |
506 | if(dir && strchr(dir, '\n')) { | |
507 | sink_writes(ev_writer_sink(c->w), "550 invalid directory name\n"); | |
508 | return 1; | |
509 | } | |
510 | if(re && strchr(re, '\n')) { | |
511 | sink_writes(ev_writer_sink(c->w), "550 invalid regexp\n"); | |
512 | return 1; | |
513 | } | |
514 | /* We bother eliminating "" because the web interface is relatively | |
515 | * likely to send it */ | |
516 | if(re && *re) { | |
517 | byte_xasprintf(&key, "%d\n%s\n%s", (int)what, dir ? dir : "", re); | |
518 | fvec = (char **)cache_get(&cache_files_type, key); | |
519 | if(fvec) { | |
520 | /* Got a cache hit, don't store the answer in the cache */ | |
521 | key = 0; | |
522 | ++cache_files_hits; | |
523 | rec = 0; /* quieten compiler */ | |
524 | } else { | |
525 | /* Cache miss, we'll do the lookup and key != 0 so we'll store the answer | |
526 | * in the cache. */ | |
527 | if(!(rec = pcre_compile(re, PCRE_CASELESS|PCRE_UTF8, | |
528 | &errstr, &erroffset, 0))) { | |
529 | sink_printf(ev_writer_sink(c->w), "550 Error compiling regexp: %s\n", | |
530 | errstr); | |
531 | return 1; | |
532 | } | |
533 | /* It only counts as a miss if the regexp was valid. */ | |
534 | ++cache_files_misses; | |
535 | } | |
536 | } else { | |
537 | /* No regexp, don't bother caching the result */ | |
538 | rec = 0; | |
539 | key = 0; | |
540 | fvec = 0; | |
541 | } | |
542 | if(!fvec) { | |
543 | /* No cache hit (either because a miss, or because we did not look) so do | |
544 | * the lookup */ | |
545 | if(dir && *dir) | |
546 | fvec = trackdb_list(dir, 0, what, rec); | |
547 | else | |
548 | fvec = trackdb_list(0, 0, what, rec); | |
549 | } | |
550 | if(key) | |
551 | /* Put the answer in the cache */ | |
552 | cache_put(&cache_files_type, key, fvec); | |
553 | sink_writes(ev_writer_sink(c->w), "253 Listing follow\n"); | |
554 | return output_list(c, fvec); | |
555 | } | |
556 | ||
557 | static int c_files(struct conn *c, | |
558 | char **vec, | |
559 | int nvec) { | |
560 | return files_dirs(c, vec, nvec, trackdb_files); | |
561 | } | |
562 | ||
563 | static int c_dirs(struct conn *c, | |
564 | char **vec, | |
565 | int nvec) { | |
566 | return files_dirs(c, vec, nvec, trackdb_directories); | |
567 | } | |
568 | ||
569 | static int c_allfiles(struct conn *c, | |
570 | char **vec, | |
571 | int nvec) { | |
572 | return files_dirs(c, vec, nvec, trackdb_directories|trackdb_files); | |
573 | } | |
574 | ||
575 | static int c_get(struct conn *c, | |
576 | char **vec, | |
577 | int attribute((unused)) nvec) { | |
578 | const char *v; | |
579 | ||
580 | if(vec[1][0] != '_' && (v = trackdb_get(vec[0], vec[1]))) | |
581 | sink_printf(ev_writer_sink(c->w), "252 %s\n", v); | |
582 | else | |
583 | sink_writes(ev_writer_sink(c->w), "550 not found\n"); | |
584 | return 1; | |
585 | } | |
586 | ||
587 | static int c_length(struct conn *c, | |
588 | char **vec, | |
589 | int attribute((unused)) nvec) { | |
590 | const char *track, *v; | |
591 | ||
592 | if(!(track = trackdb_resolve(vec[0]))) { | |
593 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
594 | return 1; | |
595 | } | |
596 | if((v = trackdb_get(track, "_length"))) | |
597 | sink_printf(ev_writer_sink(c->w), "252 %s\n", v); | |
598 | else | |
599 | sink_writes(ev_writer_sink(c->w), "550 not found\n"); | |
600 | return 1; | |
601 | } | |
602 | ||
603 | static int c_set(struct conn *c, | |
604 | char **vec, | |
605 | int attribute((unused)) nvec) { | |
606 | if(vec[1][0] != '_' && !trackdb_set(vec[0], vec[1], vec[2])) | |
607 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
608 | else | |
609 | sink_writes(ev_writer_sink(c->w), "550 not found\n"); | |
610 | return 1; | |
611 | } | |
612 | ||
613 | static int c_prefs(struct conn *c, | |
614 | char **vec, | |
615 | int attribute((unused)) nvec) { | |
616 | struct kvp *k; | |
617 | ||
618 | k = trackdb_get_all(vec[0]); | |
619 | sink_writes(ev_writer_sink(c->w), "253 prefs follow\n"); | |
620 | for(; k; k = k->next) | |
621 | if(k->name[0] != '_') /* omit internal values */ | |
622 | sink_printf(ev_writer_sink(c->w), | |
623 | " %s %s\n", quoteutf8(k->name), quoteutf8(k->value)); | |
624 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
625 | return 1; | |
626 | } | |
627 | ||
628 | static int c_exists(struct conn *c, | |
629 | char **vec, | |
630 | int attribute((unused)) nvec) { | |
631 | sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[trackdb_exists(vec[0])]); | |
632 | return 1; | |
633 | } | |
634 | ||
635 | static void search_parse_error(const char *msg, void *u) { | |
636 | *(const char **)u = msg; | |
637 | } | |
638 | ||
639 | static int c_search(struct conn *c, | |
640 | char **vec, | |
641 | int attribute((unused)) nvec) { | |
642 | char **terms, **results; | |
643 | int nterms, nresults, n; | |
644 | const char *e = "unknown error"; | |
645 | ||
646 | /* This is a bit of a bodge. Initially it's there to make the eclient | |
647 | * interface a bit more convenient to add searching to, but it has the more | |
648 | * compelling advantage that if everything uses it, then interpretation of | |
649 | * user-supplied search strings will be the same everywhere. */ | |
650 | if(!(terms = split(vec[0], &nterms, SPLIT_QUOTES, search_parse_error, &e))) { | |
651 | sink_printf(ev_writer_sink(c->w), "550 %s\n", e); | |
652 | } else { | |
653 | results = trackdb_search(terms, nterms, &nresults); | |
654 | sink_printf(ev_writer_sink(c->w), "253 %d matches\n", nresults); | |
655 | for(n = 0; n < nresults; ++n) | |
656 | sink_printf(ev_writer_sink(c->w), "%s\n", results[n]); | |
657 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
658 | } | |
659 | return 1; | |
660 | } | |
661 | ||
662 | static int c_random_enable(struct conn *c, | |
663 | char attribute((unused)) **vec, | |
664 | int attribute((unused)) nvec) { | |
665 | enable_random(c->who, c->ev); | |
666 | /* Enable implicitly unpauses if there is nothing playing */ | |
667 | if(paused && !playing) resume_playing(c->who); | |
668 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
669 | return 1; /* completed */ | |
670 | } | |
671 | ||
672 | static int c_random_disable(struct conn *c, | |
673 | char attribute((unused)) **vec, | |
674 | int attribute((unused)) nvec) { | |
675 | disable_random(c->who); | |
676 | sink_writes(ev_writer_sink(c->w), "250 OK\n"); | |
677 | return 1; /* completed */ | |
678 | } | |
679 | ||
680 | static int c_random_enabled(struct conn *c, | |
681 | char attribute((unused)) **vec, | |
682 | int attribute((unused)) nvec) { | |
683 | sink_printf(ev_writer_sink(c->w), "252 %s\n", noyes[random_is_enabled()]); | |
684 | return 1; /* completed */ | |
685 | } | |
686 | ||
d6dde5a3 RK |
687 | static void got_stats(char *stats, void *u) { |
688 | struct conn *const c = u; | |
689 | ||
690 | sink_printf(ev_writer_sink(c->w), "253 stats\n%s\n.\n", stats); | |
691 | /* Now we can start processing commands again */ | |
692 | ev_reader_enable(c->r); | |
693 | } | |
694 | ||
460b9539 | 695 | static int c_stats(struct conn *c, |
696 | char attribute((unused)) **vec, | |
697 | int attribute((unused)) nvec) { | |
d6dde5a3 RK |
698 | trackdb_stats_subprocess(c->ev, got_stats, c); |
699 | return 0; /* not yet complete */ | |
460b9539 | 700 | } |
701 | ||
702 | static int c_volume(struct conn *c, | |
703 | char **vec, | |
704 | int nvec) { | |
705 | int l, r, set; | |
706 | char lb[32], rb[32]; | |
707 | ||
708 | switch(nvec) { | |
709 | case 0: | |
710 | set = 0; | |
711 | break; | |
712 | case 1: | |
713 | l = r = atoi(vec[0]); | |
714 | set = 1; | |
715 | break; | |
716 | case 2: | |
717 | l = atoi(vec[0]); | |
718 | r = atoi(vec[1]); | |
719 | set = 1; | |
720 | break; | |
721 | default: | |
722 | abort(); | |
723 | } | |
724 | if(mixer_control(&l, &r, set)) | |
725 | sink_writes(ev_writer_sink(c->w), "550 error accessing mixer\n"); | |
726 | else { | |
727 | sink_printf(ev_writer_sink(c->w), "252 %d %d\n", l, r); | |
728 | if(l != volume_left || r != volume_right) { | |
729 | volume_left = l; | |
730 | volume_right = r; | |
731 | snprintf(lb, sizeof lb, "%d", l); | |
732 | snprintf(rb, sizeof rb, "%d", r); | |
733 | eventlog("volume", lb, rb, (char *)0); | |
734 | } | |
735 | } | |
736 | return 1; | |
737 | } | |
738 | ||
397ef7bb RK |
739 | /** @brief Called when data arrives on a log connection |
740 | * | |
741 | * We just discard all such data. The client may occasionally send data as a | |
742 | * keepalive. | |
743 | */ | |
744 | static int logging_reader_callback(ev_source attribute((unused)) *ev, | |
460b9539 | 745 | ev_reader *reader, |
397ef7bb | 746 | void attribute((unused)) *ptr, |
460b9539 | 747 | size_t bytes, |
397ef7bb RK |
748 | int attribute((unused)) eof, |
749 | void attribute((unused)) *u) { | |
460b9539 | 750 | struct conn *c = u; |
751 | ||
397ef7bb RK |
752 | ev_reader_consume(reader, bytes); |
753 | if(eof) { | |
754 | /* Oops, that's all for now */ | |
8d8b8c1f | 755 | D(("logging reader eof")); |
397ef7bb | 756 | if(c->w) { |
8d8b8c1f | 757 | D(("close writer")); |
397ef7bb RK |
758 | ev_writer_close(c->w); |
759 | c->w = 0; | |
760 | } | |
761 | c->r = 0; | |
f6033c46 | 762 | } |
397ef7bb | 763 | return 0; |
460b9539 | 764 | } |
765 | ||
766 | static void logclient(const char *msg, void *user) { | |
767 | struct conn *c = user; | |
768 | ||
f6033c46 RK |
769 | if(!c->w || !c->r) { |
770 | /* This connection has gone up in smoke for some reason */ | |
771 | eventlog_remove(c->lo); | |
772 | return; | |
773 | } | |
460b9539 | 774 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" %s\n", |
775 | (uintmax_t)time(0), msg); | |
776 | } | |
777 | ||
778 | static int c_log(struct conn *c, | |
779 | char attribute((unused)) **vec, | |
780 | int attribute((unused)) nvec) { | |
781 | time_t now; | |
782 | ||
783 | sink_writes(ev_writer_sink(c->w), "254 OK\n"); | |
784 | /* pump out initial state */ | |
785 | time(&now); | |
786 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n", | |
787 | (uintmax_t)now, | |
788 | playing_is_enabled() ? "enable_play" : "disable_play"); | |
789 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n", | |
790 | (uintmax_t)now, | |
791 | random_is_enabled() ? "enable_random" : "disable_random"); | |
792 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state %s\n", | |
793 | (uintmax_t)now, | |
794 | paused ? "pause" : "resume"); | |
5abe307a RK |
795 | if(playing) |
796 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" state playing\n", | |
797 | (uintmax_t)now); | |
df44d69b RK |
798 | /* Initial volume */ |
799 | sink_printf(ev_writer_sink(c->w), "%"PRIxMAX" volume %d %d\n", | |
800 | (uintmax_t)now, volume_left, volume_right); | |
460b9539 | 801 | c->lo = xmalloc(sizeof *c->lo); |
802 | c->lo->fn = logclient; | |
803 | c->lo->user = c; | |
804 | eventlog_add(c->lo); | |
805 | c->reader = logging_reader_callback; | |
806 | return 0; | |
807 | } | |
808 | ||
809 | static void post_move_cleanup(void) { | |
810 | struct queue_entry *q; | |
811 | ||
138baa2d RK |
812 | /* If we have caused any random tracks to not be at the end then we make them |
813 | * no longer be random. */ | |
460b9539 | 814 | for(q = qhead.next; q != &qhead; q = q->next) |
815 | if(q->state == playing_random && q->next != &qhead) | |
816 | q->state = playing_unplayed; | |
817 | /* That might mean we need to add a new random track. */ | |
818 | add_random_track(); | |
819 | queue_write(); | |
820 | } | |
821 | ||
822 | static int c_move(struct conn *c, | |
823 | char **vec, | |
824 | int attribute((unused)) nvec) { | |
825 | struct queue_entry *q; | |
826 | int n; | |
827 | ||
828 | if(config->restrictions & RESTRICT_MOVE) { | |
829 | if(!trusted(c)) { | |
830 | sink_writes(ev_writer_sink(c->w), | |
831 | "550 only trusted users can move tracks\n"); | |
832 | return 1; | |
833 | } | |
834 | } | |
835 | if(!(q = queue_find(vec[0]))) { | |
836 | sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n"); | |
837 | return 1; | |
838 | } | |
839 | n = queue_move(q, atoi(vec[1]), c->who); | |
840 | post_move_cleanup(); | |
841 | sink_printf(ev_writer_sink(c->w), "252 %d\n", n); | |
842 | /* If we've moved to the head of the queue then prepare the track. */ | |
843 | if(q == qhead.next) | |
844 | prepare(c->ev, q); | |
845 | return 1; | |
846 | } | |
847 | ||
848 | static int c_moveafter(struct conn *c, | |
849 | char **vec, | |
850 | int attribute((unused)) nvec) { | |
851 | struct queue_entry *q, **qs; | |
852 | int n; | |
853 | ||
854 | if(config->restrictions & RESTRICT_MOVE) { | |
855 | if(!trusted(c)) { | |
856 | sink_writes(ev_writer_sink(c->w), | |
857 | "550 only trusted users can move tracks\n"); | |
858 | return 1; | |
859 | } | |
860 | } | |
861 | if(vec[0][0]) { | |
862 | if(!(q = queue_find(vec[0]))) { | |
863 | sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n"); | |
864 | return 1; | |
865 | } | |
866 | } else | |
867 | q = 0; | |
868 | ++vec; | |
869 | --nvec; | |
870 | qs = xcalloc(nvec, sizeof *qs); | |
871 | for(n = 0; n < nvec; ++n) | |
872 | if(!(qs[n] = queue_find(vec[n]))) { | |
873 | sink_writes(ev_writer_sink(c->w), "550 no such track on the queue\n"); | |
874 | return 1; | |
875 | } | |
876 | queue_moveafter(q, nvec, qs, c->who); | |
877 | post_move_cleanup(); | |
878 | sink_printf(ev_writer_sink(c->w), "250 Moved tracks\n"); | |
879 | /* If we've moved to the head of the queue then prepare the track. */ | |
880 | if(q == qhead.next) | |
881 | prepare(c->ev, q); | |
882 | return 1; | |
883 | } | |
884 | ||
885 | static int c_part(struct conn *c, | |
886 | char **vec, | |
887 | int attribute((unused)) nvec) { | |
888 | sink_printf(ev_writer_sink(c->w), "252 %s\n", | |
889 | trackdb_getpart(vec[0], vec[1], vec[2])); | |
890 | return 1; | |
891 | } | |
892 | ||
893 | static int c_resolve(struct conn *c, | |
894 | char **vec, | |
895 | int attribute((unused)) nvec) { | |
896 | const char *track; | |
897 | ||
898 | if(!(track = trackdb_resolve(vec[0]))) { | |
899 | sink_writes(ev_writer_sink(c->w), "550 cannot resolve track\n"); | |
900 | return 1; | |
901 | } | |
902 | sink_printf(ev_writer_sink(c->w), "252 %s\n", track); | |
903 | return 1; | |
904 | } | |
905 | ||
906 | static int c_tags(struct conn *c, | |
907 | char attribute((unused)) **vec, | |
908 | int attribute((unused)) nvec) { | |
909 | char **tags = trackdb_alltags(); | |
910 | ||
911 | sink_printf(ev_writer_sink(c->w), "253 Tag list follows\n"); | |
912 | while(*tags) { | |
913 | sink_printf(ev_writer_sink(c->w), "%s%s\n", | |
914 | **tags == '.' ? "." : "", *tags); | |
915 | ++tags; | |
916 | } | |
917 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
918 | return 1; /* completed */ | |
919 | ||
920 | } | |
921 | ||
922 | static int c_set_global(struct conn *c, | |
923 | char **vec, | |
924 | int attribute((unused)) nvec) { | |
f9635e06 RK |
925 | if(vec[0][0] == '_') { |
926 | sink_writes(ev_writer_sink(c->w), "550 cannot set internal global preferences\n"); | |
927 | return 1; | |
928 | } | |
460b9539 | 929 | trackdb_set_global(vec[0], vec[1], c->who); |
930 | sink_printf(ev_writer_sink(c->w), "250 OK\n"); | |
931 | return 1; | |
932 | } | |
933 | ||
934 | static int c_get_global(struct conn *c, | |
935 | char **vec, | |
936 | int attribute((unused)) nvec) { | |
937 | const char *s = trackdb_get_global(vec[0]); | |
938 | ||
939 | if(s) | |
940 | sink_printf(ev_writer_sink(c->w), "252 %s\n", s); | |
941 | else | |
942 | sink_writes(ev_writer_sink(c->w), "550 not found\n"); | |
943 | return 1; | |
944 | } | |
945 | ||
7858930d | 946 | static int c_nop(struct conn *c, |
947 | char attribute((unused)) **vec, | |
948 | int attribute((unused)) nvec) { | |
949 | sink_printf(ev_writer_sink(c->w), "250 Quack\n"); | |
950 | return 1; | |
951 | } | |
952 | ||
2a10b70b RK |
953 | static int c_new(struct conn *c, |
954 | char **vec, | |
955 | int nvec) { | |
956 | char **tracks = trackdb_new(0, nvec > 0 ? atoi(vec[0]) : INT_MAX); | |
957 | ||
958 | sink_printf(ev_writer_sink(c->w), "253 New track list follows\n"); | |
959 | while(*tracks) { | |
960 | sink_printf(ev_writer_sink(c->w), "%s%s\n", | |
961 | **tracks == '.' ? "." : "", *tracks); | |
962 | ++tracks; | |
963 | } | |
964 | sink_writes(ev_writer_sink(c->w), ".\n"); | |
965 | return 1; /* completed */ | |
966 | ||
967 | } | |
968 | ||
ca831831 RK |
969 | static int c_rtp_address(struct conn *c, |
970 | char attribute((unused)) **vec, | |
971 | int attribute((unused)) nvec) { | |
972 | if(config->speaker_backend == BACKEND_NETWORK) { | |
973 | sink_printf(ev_writer_sink(c->w), "252 %s %s\n", | |
974 | quoteutf8(config->broadcast.s[0]), | |
975 | quoteutf8(config->broadcast.s[1])); | |
976 | } else | |
977 | sink_writes(ev_writer_sink(c->w), "550 No RTP\n"); | |
978 | return 1; | |
979 | } | |
980 | ||
460b9539 | 981 | #define C_AUTH 0001 /* must be authenticated */ |
982 | #define C_TRUSTED 0002 /* must be trusted user */ | |
983 | ||
984 | static const struct command { | |
985 | const char *name; | |
986 | int minargs, maxargs; | |
987 | int (*fn)(struct conn *, char **, int); | |
988 | unsigned flags; | |
989 | } commands[] = { | |
990 | { "allfiles", 0, 2, c_allfiles, C_AUTH }, | |
991 | { "become", 1, 1, c_become, C_AUTH|C_TRUSTED }, | |
992 | { "dirs", 0, 2, c_dirs, C_AUTH }, | |
993 | { "disable", 0, 1, c_disable, C_AUTH }, | |
994 | { "enable", 0, 0, c_enable, C_AUTH }, | |
995 | { "enabled", 0, 0, c_enabled, C_AUTH }, | |
996 | { "exists", 1, 1, c_exists, C_AUTH }, | |
997 | { "files", 0, 2, c_files, C_AUTH }, | |
998 | { "get", 2, 2, c_get, C_AUTH }, | |
999 | { "get-global", 1, 1, c_get_global, C_AUTH }, | |
1000 | { "length", 1, 1, c_length, C_AUTH }, | |
1001 | { "log", 0, 0, c_log, C_AUTH }, | |
1002 | { "move", 2, 2, c_move, C_AUTH }, | |
1003 | { "moveafter", 1, INT_MAX, c_moveafter, C_AUTH }, | |
2a10b70b | 1004 | { "new", 0, 1, c_new, C_AUTH }, |
7858930d | 1005 | { "nop", 0, 0, c_nop, C_AUTH }, |
460b9539 | 1006 | { "part", 3, 3, c_part, C_AUTH }, |
1007 | { "pause", 0, 0, c_pause, C_AUTH }, | |
1008 | { "play", 1, 1, c_play, C_AUTH }, | |
1009 | { "playing", 0, 0, c_playing, C_AUTH }, | |
1010 | { "prefs", 1, 1, c_prefs, C_AUTH }, | |
1011 | { "queue", 0, 0, c_queue, C_AUTH }, | |
1012 | { "random-disable", 0, 0, c_random_disable, C_AUTH }, | |
1013 | { "random-enable", 0, 0, c_random_enable, C_AUTH }, | |
1014 | { "random-enabled", 0, 0, c_random_enabled, C_AUTH }, | |
1015 | { "recent", 0, 0, c_recent, C_AUTH }, | |
1016 | { "reconfigure", 0, 0, c_reconfigure, C_AUTH|C_TRUSTED }, | |
1017 | { "remove", 1, 1, c_remove, C_AUTH }, | |
1018 | { "rescan", 0, 0, c_rescan, C_AUTH|C_TRUSTED }, | |
1019 | { "resolve", 1, 1, c_resolve, C_AUTH }, | |
1020 | { "resume", 0, 0, c_resume, C_AUTH }, | |
ca831831 | 1021 | { "rtp-address", 0, 0, c_rtp_address, C_AUTH }, |
460b9539 | 1022 | { "scratch", 0, 1, c_scratch, C_AUTH }, |
1023 | { "search", 1, 1, c_search, C_AUTH }, | |
1024 | { "set", 3, 3, c_set, C_AUTH, }, | |
1025 | { "set-global", 2, 2, c_set_global, C_AUTH }, | |
1026 | { "shutdown", 0, 0, c_shutdown, C_AUTH|C_TRUSTED }, | |
1027 | { "stats", 0, 0, c_stats, C_AUTH }, | |
1028 | { "tags", 0, 0, c_tags, C_AUTH }, | |
1029 | { "unset", 2, 2, c_set, C_AUTH }, | |
1030 | { "unset-global", 1, 1, c_set_global, C_AUTH }, | |
1031 | { "user", 2, 2, c_user, 0 }, | |
1032 | { "version", 0, 0, c_version, C_AUTH }, | |
1033 | { "volume", 0, 2, c_volume, C_AUTH } | |
1034 | }; | |
1035 | ||
1036 | static void command_error(const char *msg, void *u) { | |
1037 | struct conn *c = u; | |
1038 | ||
1039 | sink_printf(ev_writer_sink(c->w), "500 parse error: %s\n", msg); | |
1040 | } | |
1041 | ||
1042 | /* process a command. Return 1 if complete, 0 if incomplete. */ | |
1043 | static int command(struct conn *c, char *line) { | |
1044 | char **vec; | |
1045 | int nvec, n; | |
1046 | ||
1047 | D(("server command %s", line)); | |
f9635e06 RK |
1048 | /* We force everything into NFC as early as possible */ |
1049 | if(!(line = utf8_compose_canon(line, strlen(line), 0))) { | |
1050 | sink_writes(ev_writer_sink(c->w), "500 cannot normalize command\n"); | |
1051 | return 1; | |
1052 | } | |
460b9539 | 1053 | if(!(vec = split(line, &nvec, SPLIT_QUOTES, command_error, c))) { |
1054 | sink_writes(ev_writer_sink(c->w), "500 cannot parse command\n"); | |
1055 | return 1; | |
1056 | } | |
1057 | if(nvec == 0) { | |
1058 | sink_writes(ev_writer_sink(c->w), "500 do what?\n"); | |
1059 | return 1; | |
1060 | } | |
1061 | if((n = TABLE_FIND(commands, struct command, name, vec[0])) < 0) | |
1062 | sink_writes(ev_writer_sink(c->w), "500 unknown command\n"); | |
1063 | else { | |
1064 | if((commands[n].flags & C_AUTH) && !c->who) { | |
1065 | sink_writes(ev_writer_sink(c->w), "530 not authenticated\n"); | |
1066 | return 1; | |
1067 | } | |
1068 | if((commands[n].flags & C_TRUSTED) && !trusted(c)) { | |
1069 | sink_writes(ev_writer_sink(c->w), "530 insufficient privilege\n"); | |
1070 | return 1; | |
1071 | } | |
1072 | ++vec; | |
1073 | --nvec; | |
1074 | if(nvec < commands[n].minargs) { | |
1075 | sink_writes(ev_writer_sink(c->w), "500 missing argument(s)\n"); | |
1076 | return 1; | |
1077 | } | |
1078 | if(nvec > commands[n].maxargs) { | |
1079 | sink_writes(ev_writer_sink(c->w), "500 too many arguments\n"); | |
1080 | return 1; | |
1081 | } | |
1082 | return commands[n].fn(c, vec, nvec); | |
1083 | } | |
1084 | return 1; /* completed */ | |
1085 | } | |
1086 | ||
1087 | /* redirect to the right reader callback for our current state */ | |
1088 | static int redirect_reader_callback(ev_source *ev, | |
1089 | ev_reader *reader, | |
460b9539 | 1090 | void *ptr, |
1091 | size_t bytes, | |
1092 | int eof, | |
1093 | void *u) { | |
1094 | struct conn *c = u; | |
1095 | ||
75d64210 | 1096 | return c->reader(ev, reader, ptr, bytes, eof, u); |
460b9539 | 1097 | } |
1098 | ||
1099 | /* the main command reader */ | |
1100 | static int reader_callback(ev_source attribute((unused)) *ev, | |
1101 | ev_reader *reader, | |
460b9539 | 1102 | void *ptr, |
1103 | size_t bytes, | |
1104 | int eof, | |
1105 | void *u) { | |
1106 | struct conn *c = u; | |
1107 | char *eol; | |
1108 | int complete; | |
1109 | ||
1110 | D(("server reader_callback")); | |
1111 | while((eol = memchr(ptr, '\n', bytes))) { | |
1112 | *eol++ = 0; | |
1113 | ev_reader_consume(reader, eol - (char *)ptr); | |
1114 | complete = command(c, ptr); | |
1115 | bytes -= (eol - (char *)ptr); | |
1116 | ptr = eol; | |
1117 | if(!complete) { | |
1118 | /* the command had better have set a new reader callback */ | |
1119 | if(bytes || eof) | |
1120 | /* there are further bytes to read, or we are at eof; arrange for the | |
1121 | * command's reader callback to handle them */ | |
1122 | return ev_reader_incomplete(reader); | |
1123 | /* nothing's going on right now */ | |
1124 | return 0; | |
1125 | } | |
1126 | /* command completed, we can go around and handle the next one */ | |
1127 | } | |
1128 | if(eof) { | |
1129 | if(bytes) | |
1130 | error(0, "S%x unterminated line", c->tag); | |
8d8b8c1f | 1131 | D(("normal reader close")); |
397ef7bb RK |
1132 | c->r = 0; |
1133 | if(c->w) { | |
8d8b8c1f | 1134 | D(("close associated writer")); |
397ef7bb RK |
1135 | ev_writer_close(c->w); |
1136 | c->w = 0; | |
1137 | } | |
460b9539 | 1138 | } |
1139 | return 0; | |
1140 | } | |
1141 | ||
1142 | static int listen_callback(ev_source *ev, | |
1143 | int fd, | |
1144 | const struct sockaddr attribute((unused)) *remote, | |
1145 | socklen_t attribute((unused)) rlen, | |
1146 | void *u) { | |
1147 | const struct listener *l = u; | |
1148 | struct conn *c = xmalloc(sizeof *c); | |
1149 | static unsigned tags; | |
1150 | ||
1151 | D(("server listen_callback fd %d (%s)", fd, l->name)); | |
1152 | nonblock(fd); | |
1153 | cloexec(fd); | |
1154 | c->tag = tags++; | |
1155 | c->ev = ev; | |
e8c92ba7 RK |
1156 | c->w = ev_writer_new(ev, fd, writer_error, c, |
1157 | "client writer"); | |
1158 | c->r = ev_reader_new(ev, fd, redirect_reader_callback, reader_error, c, | |
1159 | "client reader"); | |
75d64210 | 1160 | ev_tie(c->r, c->w); |
460b9539 | 1161 | c->fd = fd; |
1162 | c->reader = reader_callback; | |
1163 | c->l = l; | |
1164 | gcry_randomize(c->nonce, sizeof c->nonce, GCRY_STRONG_RANDOM); | |
637fdea3 RK |
1165 | if(!strcmp(config->authorization_algorithm, "sha1") |
1166 | || !strcmp(config->authorization_algorithm, "SHA1")) { | |
1167 | sink_printf(ev_writer_sink(c->w), "231 %s\n", | |
1168 | hex(c->nonce, sizeof c->nonce)); | |
1169 | } else { | |
1170 | sink_printf(ev_writer_sink(c->w), "231 %s %s\n", | |
1171 | config->authorization_algorithm, | |
1172 | hex(c->nonce, sizeof c->nonce)); | |
1173 | } | |
460b9539 | 1174 | return 0; |
1175 | } | |
1176 | ||
1177 | int server_start(ev_source *ev, int pf, | |
1178 | size_t socklen, const struct sockaddr *sa, | |
1179 | const char *name) { | |
1180 | int fd; | |
1181 | struct listener *l = xmalloc(sizeof *l); | |
1182 | static const int one = 1; | |
1183 | ||
1184 | D(("server_init socket %s", name)); | |
1185 | fd = xsocket(pf, SOCK_STREAM, 0); | |
1186 | xsetsockopt(fd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof one); | |
1187 | if(bind(fd, sa, socklen) < 0) { | |
1188 | error(errno, "error binding to %s", name); | |
1189 | return -1; | |
1190 | } | |
1191 | xlisten(fd, 128); | |
1192 | nonblock(fd); | |
1193 | cloexec(fd); | |
1194 | l->name = name; | |
1195 | l->pf = pf; | |
e8c92ba7 RK |
1196 | if(ev_listen(ev, fd, listen_callback, l, "server listener")) |
1197 | exit(EXIT_FAILURE); | |
460b9539 | 1198 | return fd; |
1199 | } | |
1200 | ||
1201 | int server_stop(ev_source *ev, int fd) { | |
1202 | xclose(fd); | |
1203 | return ev_listen_cancel(ev, fd); | |
1204 | } | |
1205 | ||
1206 | /* | |
1207 | Local Variables: | |
1208 | c-basic-offset:2 | |
1209 | comment-column:40 | |
1210 | fill-column:79 | |
1211 | End: | |
1212 | */ |