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