460b9539 |
1 | /* |
2 | * This file is part of DisOrder. |
3 | * Copyright (C) 2006 Richard Kettlewell |
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 <sys/types.h> |
25 | #include <sys/socket.h> |
26 | #include <netinet/in.h> |
27 | #include <sys/un.h> |
28 | #include <string.h> |
29 | #include <stdio.h> |
30 | #include <unistd.h> |
31 | #include <errno.h> |
32 | #include <netdb.h> |
33 | #include <stdlib.h> |
34 | #include <assert.h> |
35 | #include <inttypes.h> |
36 | #include <stddef.h> |
37 | |
38 | #include "log.h" |
39 | #include "mem.h" |
40 | #include "configuration.h" |
41 | #include "queue.h" |
42 | #include "eclient.h" |
43 | #include "charset.h" |
44 | #include "hex.h" |
45 | #include "split.h" |
46 | #include "vector.h" |
47 | #include "inputline.h" |
48 | #include "kvp.h" |
49 | #include "syscalls.h" |
50 | #include "printf.h" |
51 | #include "addr.h" |
52 | #include "authhash.h" |
53 | #include "table.h" |
54 | #include "client-common.h" |
55 | |
56 | /* TODO: more commands */ |
57 | |
58 | /* Types *********************************************************************/ |
59 | |
60 | enum client_state { |
61 | state_disconnected, /* not connected */ |
62 | state_connecting, /* waiting for connect() */ |
63 | state_connected, /* connected but not authenticated */ |
64 | state_idle, /* not doing anything */ |
65 | state_cmdresponse, /* waiting for command resonse */ |
66 | state_body, /* accumulating body */ |
67 | state_log, /* monitoring log */ |
68 | }; |
69 | |
70 | static const char *const states[] = { |
71 | "disconnected", |
72 | "connecting", |
73 | "connected", |
74 | "idle", |
75 | "cmdresponse", |
76 | "body", |
77 | "log" |
78 | }; |
79 | |
80 | struct operation; /* forward decl */ |
81 | |
82 | typedef void operation_callback(disorder_eclient *c, struct operation *op); |
83 | |
84 | /* A pending operation. This can be either a command or part of the |
85 | * authentication protocol. In the former case new commands are appended to |
86 | * the list, in the latter case they are inserted at the front. */ |
87 | struct operation { |
88 | struct operation *next; /* next operation */ |
89 | char *cmd; /* command to send or 0 */ |
90 | operation_callback *opcallback; /* internal completion callback */ |
91 | void (*completed)(); /* user completion callback or 0 */ |
92 | void *v; /* data for COMPLETED */ |
93 | disorder_eclient *client; /* owning client */ |
94 | int sent; /* true if sent to server */ |
95 | }; |
96 | |
97 | struct disorder_eclient { |
98 | const char *ident; |
99 | int fd; |
100 | enum client_state state; /* current state */ |
101 | int authenticated; /* true when authenicated */ |
102 | struct dynstr output; /* output buffer */ |
103 | struct dynstr input; /* input buffer */ |
104 | int eof; /* input buffer is at EOF */ |
105 | /* error reporting callbacks */ |
106 | const disorder_eclient_callbacks *callbacks; |
107 | void *u; |
108 | /* operation queuue */ |
109 | struct operation *ops, **opstail; |
110 | /* accumulated response */ |
111 | int rc; /* response code */ |
112 | char *line; /* complete line */ |
113 | struct vector vec; /* body */ |
114 | /* log client callback */ |
115 | const disorder_eclient_log_callbacks *log_callbacks; |
116 | void *log_v; |
117 | unsigned long statebits; /* current state */ |
118 | }; |
119 | |
120 | /* Forward declarations ******************************************************/ |
121 | |
122 | static int start_connect(void *cc, |
123 | const struct sockaddr *sa, |
124 | socklen_t len, |
125 | const char *ident); |
126 | static void process_line(disorder_eclient *c, char *line); |
127 | static int start_connect(void *cc, |
128 | const struct sockaddr *sa, |
129 | socklen_t len, |
130 | const char *ident); |
131 | static void maybe_connected(disorder_eclient *c); |
132 | static void authbanner_opcallback(disorder_eclient *c, |
133 | struct operation *op); |
134 | static void authuser_opcallback(disorder_eclient *c, |
135 | struct operation *op); |
136 | static void complete(disorder_eclient *c); |
137 | static void send_output(disorder_eclient *c); |
138 | static void put(disorder_eclient *c, const char *s, size_t n); |
139 | static void read_input(disorder_eclient *c); |
140 | static void stash_command(disorder_eclient *c, |
141 | int queuejump, |
142 | operation_callback *opcallback, |
143 | void (*completed)(), |
144 | void *v, |
145 | const char *cmd, |
146 | ...); |
147 | static void log_opcallback(disorder_eclient *c, struct operation *op); |
148 | static void logline(disorder_eclient *c, const char *line); |
149 | static void logentry_completed(disorder_eclient *c, int nvec, char **vec); |
150 | static void logentry_failed(disorder_eclient *c, int nvec, char **vec); |
151 | static void logentry_moved(disorder_eclient *c, int nvec, char **vec); |
152 | static void logentry_playing(disorder_eclient *c, int nvec, char **vec); |
153 | static void logentry_queue(disorder_eclient *c, int nvec, char **vec); |
154 | static void logentry_recent_added(disorder_eclient *c, int nvec, char **vec); |
155 | static void logentry_recent_removed(disorder_eclient *c, int nvec, char **vec); |
156 | static void logentry_removed(disorder_eclient *c, int nvec, char **vec); |
157 | static void logentry_scratched(disorder_eclient *c, int nvec, char **vec); |
158 | static void logentry_state(disorder_eclient *c, int nvec, char **vec); |
159 | static void logentry_volume(disorder_eclient *c, int nvec, char **vec); |
160 | |
161 | /* Tables ********************************************************************/ |
162 | |
163 | static const struct logentry_handler { |
164 | const char *name; |
165 | int min, max; |
166 | void (*handler)(disorder_eclient *c, |
167 | int nvec, |
168 | char **vec); |
169 | } logentry_handlers[] = { |
170 | #define LE(X, MIN, MAX) { #X, MIN, MAX, logentry_##X } |
171 | LE(completed, 1, 1), |
172 | LE(failed, 2, 2), |
173 | LE(moved, 1, 1), |
174 | LE(playing, 1, 2), |
175 | LE(queue, 2, INT_MAX), |
176 | LE(recent_added, 2, INT_MAX), |
177 | LE(recent_removed, 1, 1), |
178 | LE(removed, 1, 2), |
179 | LE(scratched, 2, 2), |
180 | LE(state, 1, 1), |
181 | LE(volume, 2, 2) |
182 | }; |
183 | |
184 | /* Setup and teardown ********************************************************/ |
185 | |
186 | disorder_eclient *disorder_eclient_new(const disorder_eclient_callbacks *cb, |
187 | void *u) { |
188 | disorder_eclient *c = xmalloc(sizeof *c); |
189 | D(("disorder_eclient_new")); |
190 | c->fd = -1; |
191 | c->callbacks = cb; |
192 | c->u = u; |
193 | c->opstail = &c->ops; |
194 | vector_init(&c->vec); |
195 | dynstr_init(&c->input); |
196 | dynstr_init(&c->output); |
197 | return c; |
198 | } |
199 | |
200 | void disorder_eclient_close(disorder_eclient *c) { |
201 | struct operation *op; |
202 | |
203 | D(("disorder_eclient_close")); |
204 | if(c->fd != -1) { |
205 | D(("disorder_eclient_close closing fd %d", c->fd)); |
206 | c->callbacks->poll(c->u, c, c->fd, 0); |
207 | xclose(c->fd); |
208 | c->fd = -1; |
209 | c->state = state_disconnected; |
210 | } |
211 | c->output.nvec = 0; |
212 | c->input.nvec = 0; |
213 | c->eof = 0; |
214 | c->authenticated = 0; |
215 | /* We'll need to resend all operations */ |
216 | for(op = c->ops; op; op = op->next) |
217 | op->sent = 0; |
218 | } |
219 | |
220 | /* Error reporting ***********************************************************/ |
221 | |
222 | /* called when a connection error occurs */ |
223 | static int comms_error(disorder_eclient *c, const char *fmt, ...) { |
224 | va_list ap; |
225 | char *s; |
226 | |
227 | D(("comms_error")); |
228 | va_start(ap, fmt); |
229 | byte_xvasprintf(&s, fmt, ap); |
230 | va_end(ap); |
231 | disorder_eclient_close(c); |
232 | c->callbacks->comms_error(c->u, s); |
233 | return -1; |
234 | } |
235 | |
236 | /* called when the server reports an error */ |
237 | static int protocol_error(disorder_eclient *c, struct operation *op, |
238 | int code, const char *fmt, ...) { |
239 | va_list ap; |
240 | char *s; |
241 | |
242 | D(("protocol_error")); |
243 | va_start(ap, fmt); |
244 | byte_xvasprintf(&s, fmt, ap); |
245 | va_end(ap); |
246 | c->callbacks->protocol_error(c->u, op->v, code, s); |
247 | return -1; |
248 | } |
249 | |
250 | /* State machine *************************************************************/ |
251 | |
252 | void disorder_eclient_polled(disorder_eclient *c, unsigned mode) { |
253 | struct operation *op; |
254 | |
255 | D(("disorder_eclient_polled fd=%d state=%s mode=[%s %s]", |
256 | c->fd, states[c->state], |
257 | mode & DISORDER_POLL_READ ? "READ" : "", |
258 | mode & DISORDER_POLL_WRITE ? "WRITE" : "")); |
259 | /* The pattern here is to check each possible state in turn and try to |
260 | * advance (though on error we might go back). If we advance we leave open |
261 | * the possibility of falling through to the next state, but we set the mode |
262 | * bits to 0, to avoid false positives (which matter more in some cases than |
263 | * others). */ |
264 | |
265 | if(c->state == state_disconnected) { |
266 | D(("state_disconnected")); |
267 | with_sockaddr(c, start_connect); |
268 | /* might now be state_disconnected (on error), state_connecting (slow |
269 | * connect) or state_connected (fast connect). If state_disconnected then |
270 | * we just rely on a periodic callback from the event loop sometime. */ |
271 | mode = 0; |
272 | } |
273 | |
274 | if(c->state == state_connecting && mode) { |
275 | D(("state_connecting")); |
276 | maybe_connected(c); |
277 | /* Might be state_disconnected (on error) or state_connected (on success). |
278 | * In the former case we rely on the event loop for a periodic callback to |
279 | * retry. */ |
280 | mode = 0; |
281 | } |
282 | |
283 | if(c->state == state_connected) { |
284 | D(("state_connected")); |
285 | /* We just connected. Initiate the authentication protocol. */ |
286 | stash_command(c, 1/*queuejump*/, authbanner_opcallback, |
287 | 0/*completed*/, 0/*v*/, 0/*cmd*/); |
288 | /* We never stay is state_connected very long. We could in principle jump |
289 | * straight to state_cmdresponse since there's actually no command to |
290 | * send, but that would arguably be cheating. */ |
291 | c->state = state_idle; |
292 | } |
293 | |
294 | if(c->state == state_idle) { |
295 | D(("state_idle")); |
296 | /* We are connected, and have finished any command we set off, look for |
297 | * some work to do */ |
298 | if(c->ops) { |
299 | D(("have ops")); |
300 | if(c->authenticated) { |
301 | /* Transmit all unsent operations */ |
302 | for(op = c->ops; op; op = op->next) { |
303 | if(!op->sent) { |
304 | put(c, op->cmd, strlen(op->cmd)); |
305 | op->sent = 1; |
306 | } |
307 | } |
308 | } else { |
309 | /* Just send the head operation */ |
310 | if(c->ops->cmd && !c->ops->sent) { |
311 | put(c, c->ops->cmd, strlen(c->ops->cmd)); |
312 | c->ops->sent = 1; |
313 | } |
314 | } |
315 | /* Awaiting response for the operation at the head of the list */ |
316 | c->state = state_cmdresponse; |
317 | } else |
318 | /* genuinely idle */ |
319 | c->callbacks->report(c->u, 0); |
320 | } |
321 | |
322 | if(c->state == state_cmdresponse |
323 | || c->state == state_body |
324 | || c->state == state_log) { |
325 | D(("state_%s", states[c->state])); |
326 | /* We are awaiting a response */ |
327 | if(mode & DISORDER_POLL_WRITE) send_output(c); |
328 | if(mode & DISORDER_POLL_READ) read_input(c); |
329 | /* There are a couple of reasons we might want to re-enter the state |
330 | * machine from the top. state_idle is obvious: there may be further |
331 | * commands to process. Re-entering on state_disconnected means that we |
332 | * immediately retry connection if a comms error occurs during a command. |
333 | * This is different to the case where a connection fails, where we await a |
334 | * spontaneous call to initiate the retry. */ |
335 | switch(c->state) { |
336 | case state_disconnected: /* lost connection */ |
337 | case state_idle: /* completed a command */ |
338 | D(("retrying")); |
339 | disorder_eclient_polled(c, 0); |
340 | return; |
341 | default: |
342 | break; |
343 | } |
344 | } |
345 | |
346 | /* Figure out what to set the mode to */ |
347 | switch(c->state) { |
348 | case state_disconnected: |
349 | D(("state_disconnected (2)")); |
350 | /* Probably an error occurred. Await a retry. */ |
351 | mode = 0; |
352 | break; |
353 | case state_connecting: |
354 | D(("state_connecting (2)")); |
355 | /* Waiting for connect to complete */ |
356 | mode = DISORDER_POLL_READ|DISORDER_POLL_WRITE; |
357 | break; |
358 | case state_connected: |
359 | D(("state_connected (2)")); |
360 | assert(!"should never be in state_connected here"); |
361 | break; |
362 | case state_idle: |
363 | D(("state_idle (2)")); |
364 | /* Connected but nothing to do. */ |
365 | mode = 0; |
366 | break; |
367 | case state_cmdresponse: |
368 | case state_body: |
369 | case state_log: |
370 | D(("state_%s (2)", states[c->state])); |
371 | /* Gathering a response. Wait for input. */ |
372 | mode = DISORDER_POLL_READ; |
373 | /* Flush any pending output. */ |
374 | if(c->output.nvec) mode |= DISORDER_POLL_WRITE; |
375 | break; |
376 | } |
377 | D(("fd=%d new mode [%s %s]", |
378 | c->fd, |
379 | mode & DISORDER_POLL_READ ? "READ" : "", |
380 | mode & DISORDER_POLL_WRITE ? "WRITE" : "")); |
381 | if(c->fd != -1) c->callbacks->poll(c->u, c, c->fd, mode); |
382 | } |
383 | |
384 | /* Called to start connecting */ |
385 | static int start_connect(void *cc, |
386 | const struct sockaddr *sa, |
387 | socklen_t len, |
388 | const char *ident) { |
389 | disorder_eclient *c = cc; |
390 | |
391 | D(("start_connect")); |
392 | c->ident = xstrdup(ident); |
393 | if(c->fd != -1) { |
394 | xclose(c->fd); |
395 | c->fd = -1; |
396 | } |
397 | if((c->fd = socket(sa->sa_family, SOCK_STREAM, 0)) < 0) |
398 | return comms_error(c, "socket: %s", strerror(errno)); |
399 | c->eof = 0; |
400 | nonblock(c->fd); |
401 | if(connect(c->fd, sa, len) < 0) { |
402 | switch(errno) { |
403 | case EINTR: |
404 | case EINPROGRESS: |
405 | c->state = state_connecting; |
406 | /* We are called from _polled so the state machine will get to do its |
407 | * thing */ |
408 | return 0; |
409 | default: |
410 | /* Signal the error to the caller. */ |
411 | return comms_error(c, "connecting to %s: %s", ident, strerror(errno)); |
412 | } |
413 | } else |
414 | c->state = state_connected; |
415 | return 0; |
416 | } |
417 | |
418 | /* Called when maybe connected */ |
419 | static void maybe_connected(disorder_eclient *c) { |
420 | /* We either connected, or got an error. */ |
421 | int err; |
422 | socklen_t len = sizeof err; |
423 | |
424 | D(("maybe_connected")); |
425 | /* Work around over-enthusiastic error slippage */ |
426 | if(getsockopt(c->fd, SOL_SOCKET, SO_ERROR, &err, &len) < 0) |
427 | err = errno; |
428 | if(err) { |
429 | /* The connection failed */ |
430 | comms_error(c, "connecting to %s: %s", c->ident, strerror(err)); |
431 | /* sets state_disconnected */ |
432 | } else { |
433 | /* The connection succeeded */ |
434 | c->state = state_connected; |
435 | } |
436 | } |
437 | |
438 | /* Authentication ************************************************************/ |
439 | |
440 | static void authbanner_opcallback(disorder_eclient *c, |
441 | struct operation *op) { |
442 | size_t nonce_len; |
443 | const unsigned char *nonce; |
444 | const char *res; |
445 | |
446 | D(("authbanner_opcallback")); |
447 | if(c->rc / 100 != 2) { |
448 | /* Banner told us to go away. We cannot proceed. */ |
449 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); |
450 | disorder_eclient_close(c); |
451 | return; |
452 | } |
453 | nonce = unhex(c->line + 4, &nonce_len); |
454 | res = authhash(nonce, nonce_len, config->password); |
455 | stash_command(c, 1/*queuejump*/, authuser_opcallback, 0/*completed*/, 0/*v*/, |
456 | "user", quoteutf8(config->username), quoteutf8(res), |
457 | (char *)0); |
458 | } |
459 | |
460 | static void authuser_opcallback(disorder_eclient *c, |
461 | struct operation *op) { |
462 | D(("authuser_opcallback")); |
463 | if(c->rc / 100 != 2) { |
464 | /* Wrong password or something. We cannot proceed. */ |
465 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); |
466 | disorder_eclient_close(c); |
467 | return; |
468 | } |
469 | /* OK, we're authenticated now. */ |
470 | c->authenticated = 1; |
471 | if(c->log_callbacks && !(c->ops && c->ops->opcallback == log_opcallback)) |
472 | /* We are a log client, switch to logging mode */ |
473 | stash_command(c, 0/*queuejump*/, log_opcallback, 0/*completed*/, c->log_v, |
474 | "log", (char *)0); |
475 | } |
476 | |
477 | /* Output ********************************************************************/ |
478 | |
479 | /* Chop N bytes off the front of a dynstr */ |
480 | static void consume(struct dynstr *d, int n) { |
481 | D(("consume %d", n)); |
482 | assert(d->nvec >= n); |
483 | memmove(d->vec, d->vec + n, d->nvec - n); |
484 | d->nvec -= n; |
485 | } |
486 | |
487 | /* Write some bytes */ |
488 | static void put(disorder_eclient *c, const char *s, size_t n) { |
489 | D(("put %d %.*s", c->fd, (int)n, s)); |
490 | dynstr_append_bytes(&c->output, s, n); |
491 | } |
492 | |
493 | /* Called when we can write to our FD, or at any other time */ |
494 | static void send_output(disorder_eclient *c) { |
495 | int n; |
496 | |
497 | D(("send_output %d bytes pending", c->output.nvec)); |
498 | if(c->state > state_connecting && c->output.nvec) { |
499 | n = write(c->fd, c->output.vec, c->output.nvec); |
500 | if(n < 0) { |
501 | switch(errno) { |
502 | case EINTR: |
503 | case EAGAIN: |
504 | break; |
505 | default: |
506 | comms_error(c, "writing to %s: %s", c->ident, strerror(errno)); |
507 | break; |
508 | } |
509 | } else |
510 | consume(&c->output, n); |
511 | } |
512 | } |
513 | |
514 | /* Input *********************************************************************/ |
515 | |
516 | /* Called when c->fd might be readable, or at any other time */ |
517 | static void read_input(disorder_eclient *c) { |
518 | char *nl; |
519 | int n; |
520 | char buffer[512]; |
521 | |
522 | D(("read_input in state %s", states[c->state])); |
523 | if(c->state <= state_connected) return; /* ignore bogus calls */ |
524 | /* read some more input */ |
525 | n = read(c->fd, buffer, sizeof buffer); |
526 | if(n < 0) { |
527 | switch(errno) { |
528 | case EINTR: |
529 | case EAGAIN: |
530 | break; |
531 | default: |
532 | comms_error(c, "reading from %s: %s", c->ident, strerror(errno)); |
533 | break; |
534 | } |
535 | return; /* no new input to process */ |
536 | } else if(n) { |
537 | D(("read %d bytes: [%.*s]", n, n, buffer)); |
538 | dynstr_append_bytes(&c->input, buffer, n); |
539 | } else |
540 | c->eof = 1; |
541 | /* might have more than one line to process */ |
542 | while(c->state > state_connecting |
543 | && (nl = memchr(c->input.vec, '\n', c->input.nvec))) { |
544 | process_line(c, xstrndup(c->input.vec, nl - c->input.vec)); |
545 | /* we might have disconnected along the way, which zogs the input buffer */ |
546 | if(c->state > state_connecting) |
547 | consume(&c->input, (nl - c->input.vec) + 1); |
548 | } |
346ba8d5 |
549 | if(c->eof) { |
460b9539 |
550 | comms_error(c, "reading from %s: server disconnected", c->ident); |
346ba8d5 |
551 | c->authenticated = 0; |
552 | } |
460b9539 |
553 | } |
554 | |
555 | /* called with a line that has just been read */ |
556 | static void process_line(disorder_eclient *c, char *line) { |
557 | D(("process_line %d [%s]", c->fd, line)); |
558 | switch(c->state) { |
559 | case state_cmdresponse: |
560 | /* This is the first line of a response */ |
561 | if(!(line[0] >= '0' && line[0] <= '9' |
562 | && line[1] >= '0' && line[1] <= '9' |
563 | && line[2] >= '0' && line[2] <= '9' |
564 | && line[3] == ' ')) |
565 | fatal(0, "invalid response from server: %s", line); |
566 | c->rc = (line[0] * 10 + line[1]) * 10 + line[2] - 111 * '0'; |
567 | c->line = line; |
568 | switch(c->rc % 10) { |
569 | case 3: |
570 | /* We need to collect the body. */ |
571 | c->state = state_body; |
572 | c->vec.nvec = 0; |
573 | break; |
574 | case 4: |
575 | assert(c->log_callbacks != 0); |
576 | if(c->log_callbacks->connected) |
577 | c->log_callbacks->connected(c->log_v); |
578 | c->state = state_log; |
579 | break; |
580 | default: |
581 | /* We've got the whole response. Go into the idle state so the state |
582 | * machine knows we're done and then call the operation callback. */ |
583 | complete(c); |
584 | break; |
585 | } |
586 | break; |
587 | case state_body: |
588 | if(strcmp(line, ".")) { |
589 | /* A line from the body */ |
590 | vector_append(&c->vec, line + (line[0] == '.')); |
591 | } else { |
592 | /* End of the body. */ |
593 | vector_terminate(&c->vec); |
594 | complete(c); |
595 | } |
596 | break; |
597 | case state_log: |
598 | if(strcmp(line, ".")) { |
599 | logline(c, line + (line[0] == '.')); |
600 | } else |
601 | complete(c); |
602 | break; |
603 | default: |
604 | assert(!"wrong state for location"); |
605 | break; |
606 | } |
607 | } |
608 | |
609 | /* Called when an operation completes */ |
610 | static void complete(disorder_eclient *c) { |
611 | struct operation *op; |
612 | |
613 | D(("complete")); |
614 | /* Pop the operation off the queue */ |
615 | op = c->ops; |
616 | c->ops = op->next; |
617 | if(c->opstail == &op->next) |
618 | c->opstail = &c->ops; |
619 | /* If we've pipelined a command ahead then we go straight to cmdresponser. |
620 | * Otherwise we go to idle, which will arrange further sends. */ |
621 | c->state = c->ops && c->ops->sent ? state_cmdresponse : state_idle; |
622 | op->opcallback(c, op); |
623 | /* Note that we always call the opcallback even on error, though command |
624 | * opcallbacks generally always do the same error handling, i.e. just call |
625 | * protocol_error(). It's the auth* opcallbacks that have different |
626 | * behaviour. */ |
627 | } |
628 | |
629 | /* Operation setup ***********************************************************/ |
630 | |
631 | static void stash_command_vector(disorder_eclient *c, |
632 | int queuejump, |
633 | operation_callback *opcallback, |
634 | void (*completed)(), |
635 | void *v, |
636 | int ncmd, |
637 | char **cmd) { |
638 | struct operation *op = xmalloc(sizeof *op); |
639 | struct dynstr d; |
640 | int n; |
641 | |
642 | if(cmd) { |
643 | dynstr_init(&d); |
644 | for(n = 0; n < ncmd; ++n) { |
645 | if(n) |
646 | dynstr_append(&d, ' '); |
647 | dynstr_append_string(&d, quoteutf8(cmd[n])); |
648 | } |
649 | dynstr_append(&d, '\n'); |
650 | dynstr_terminate(&d); |
651 | op->cmd = d.vec; |
652 | } else |
653 | op->cmd = 0; /* usually, awaiting challenge */ |
654 | op->opcallback = opcallback; |
655 | op->completed = completed; |
656 | op->v = v; |
657 | op->next = 0; |
658 | op->client = c; |
659 | assert(op->sent == 0); |
660 | if(queuejump) { |
661 | /* Authentication operations jump the queue of useful commands */ |
662 | op->next = c->ops; |
663 | c->ops = op; |
664 | if(c->opstail == &c->ops) |
665 | c->opstail = &op->next; |
666 | for(op = c->ops; op; op = op->next) |
667 | assert(!op->sent); |
668 | } else { |
669 | *c->opstail = op; |
670 | c->opstail = &op->next; |
671 | } |
672 | } |
673 | |
674 | static void vstash_command(disorder_eclient *c, |
675 | int queuejump, |
676 | operation_callback *opcallback, |
677 | void (*completed)(), |
678 | void *v, |
679 | const char *cmd, va_list ap) { |
680 | char *arg; |
681 | struct vector vec; |
682 | |
683 | D(("vstash_command %s", cmd ? cmd : "NULL")); |
684 | if(cmd) { |
685 | vector_init(&vec); |
686 | vector_append(&vec, (char *)cmd); |
687 | while((arg = va_arg(ap, char *))) |
688 | vector_append(&vec, arg); |
689 | stash_command_vector(c, queuejump, opcallback, completed, v, |
690 | vec.nvec, vec.vec); |
691 | } else |
692 | stash_command_vector(c, queuejump, opcallback, completed, v, 0, 0); |
693 | } |
694 | |
695 | static void stash_command(disorder_eclient *c, |
696 | int queuejump, |
697 | operation_callback *opcallback, |
698 | void (*completed)(), |
699 | void *v, |
700 | const char *cmd, |
701 | ...) { |
702 | va_list ap; |
703 | |
704 | va_start(ap, cmd); |
705 | vstash_command(c, queuejump, opcallback, completed, v, cmd, ap); |
706 | va_end(ap); |
707 | } |
708 | |
709 | /* Command support ***********************************************************/ |
710 | |
711 | /* for commands with a simple string response */ |
712 | static void string_response_opcallback(disorder_eclient *c, |
713 | struct operation *op) { |
714 | D(("string_response_callback")); |
715 | if(c->rc / 100 == 2) { |
716 | if(op->completed) |
717 | ((disorder_eclient_string_response *)op->completed)(op->v, c->line + 4); |
718 | } else |
719 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); |
720 | } |
721 | |
722 | /* for commands with a simple integer response */ |
723 | static void integer_response_opcallback(disorder_eclient *c, |
724 | struct operation *op) { |
725 | D(("string_response_callback")); |
726 | if(c->rc / 100 == 2) { |
727 | if(op->completed) |
728 | ((disorder_eclient_integer_response *)op->completed) |
729 | (op->v, strtol(c->line + 4, 0, 10)); |
730 | } else |
731 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); |
732 | } |
733 | |
734 | /* for commands with no response */ |
735 | static void no_response_opcallback(disorder_eclient *c, |
736 | struct operation *op) { |
737 | D(("no_response_callback")); |
738 | if(c->rc / 100 == 2) { |
739 | if(op->completed) |
740 | ((disorder_eclient_no_response *)op->completed)(op->v); |
741 | } else |
742 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); |
743 | } |
744 | |
745 | /* error callback for queue_unmarshall */ |
746 | static void eclient_queue_error(const char *msg, |
747 | void *u) { |
748 | struct operation *op = u; |
749 | |
750 | protocol_error(op->client, op, -1, "error parsing queue entry: %s", msg); |
751 | } |
752 | |
753 | /* for commands that expect a queue dump */ |
754 | static void queue_response_opcallback(disorder_eclient *c, |
755 | struct operation *op) { |
756 | int n; |
757 | struct queue_entry *q, *qh = 0, **qtail = &qh, *qlast = 0; |
758 | |
759 | D(("queue_response_callback")); |
760 | if(c->rc / 100 == 2) { |
761 | /* parse the queue */ |
762 | for(n = 0; n < c->vec.nvec; ++n) { |
763 | q = xmalloc(sizeof *q); |
764 | D(("queue_unmarshall %s", c->vec.vec[n])); |
765 | if(!queue_unmarshall(q, c->vec.vec[n], eclient_queue_error, op)) { |
766 | q->prev = qlast; |
767 | *qtail = q; |
768 | qtail = &q->next; |
769 | qlast = q; |
770 | } |
771 | } |
772 | if(op->completed) |
773 | ((disorder_eclient_queue_response *)op->completed)(op->v, qh); |
774 | } else |
775 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); |
776 | } |
777 | |
778 | /* for 'playing' */ |
779 | static void playing_response_opcallback(disorder_eclient *c, |
780 | struct operation *op) { |
781 | struct queue_entry *q; |
782 | |
783 | D(("playing_response_callback")); |
784 | if(c->rc / 100 == 2) { |
785 | switch(c->rc % 10) { |
786 | case 2: |
787 | if(queue_unmarshall(q = xmalloc(sizeof *q), c->line + 4, |
788 | eclient_queue_error, c)) |
789 | return; |
790 | break; |
791 | case 9: |
792 | q = 0; |
793 | break; |
794 | default: |
795 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); |
796 | return; |
797 | } |
798 | if(op->completed) |
799 | ((disorder_eclient_queue_response *)op->completed)(op->v, q); |
800 | } else |
801 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); |
802 | } |
803 | |
804 | /* for commands that expect a list of some sort */ |
805 | static void list_response_opcallback(disorder_eclient *c, |
806 | struct operation *op) { |
807 | D(("list_response_callback")); |
808 | if(c->rc / 100 == 2) { |
809 | if(op->completed) |
810 | ((disorder_eclient_list_response *)op->completed)(op->v, |
811 | c->vec.nvec, |
812 | c->vec.vec); |
813 | } else |
814 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); |
815 | } |
816 | |
817 | /* for volume */ |
818 | static void volume_response_opcallback(disorder_eclient *c, |
819 | struct operation *op) { |
820 | int l, r; |
821 | |
822 | D(("volume_response_callback")); |
823 | if(c->rc / 100 == 2) { |
824 | if(op->completed) { |
825 | if(sscanf(c->line + 4, "%d %d", &l, &r) != 2 || l < 0 || r < 0) |
826 | protocol_error(c, op, -1, "%s: invalid volume response: %s", |
827 | c->ident, c->line); |
828 | else |
829 | ((disorder_eclient_volume_response *)op->completed)(op->v, l, r); |
830 | } |
831 | } else |
832 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); |
833 | } |
834 | |
835 | static int simple(disorder_eclient *c, |
836 | operation_callback *opcallback, |
837 | void (*completed)(), |
838 | void *v, |
839 | const char *cmd, ...) { |
840 | va_list ap; |
841 | |
842 | va_start(ap, cmd); |
843 | vstash_command(c, 0/*queuejump*/, opcallback, completed, v, cmd, ap); |
844 | va_end(ap); |
845 | /* Give the state machine a kick, since we might be in state_idle */ |
846 | disorder_eclient_polled(c, 0); |
847 | return 0; |
848 | } |
849 | |
850 | /* Commands ******************************************************************/ |
851 | |
852 | int disorder_eclient_version(disorder_eclient *c, |
853 | disorder_eclient_string_response *completed, |
854 | void *v) { |
855 | return simple(c, string_response_opcallback, (void (*)())completed, v, |
856 | "version", (char *)0); |
857 | } |
858 | |
859 | int disorder_eclient_namepart(disorder_eclient *c, |
860 | disorder_eclient_string_response *completed, |
861 | const char *track, |
862 | const char *context, |
863 | const char *part, |
864 | void *v) { |
865 | return simple(c, string_response_opcallback, (void (*)())completed, v, |
866 | "part", track, context, part, (char *)0); |
867 | } |
868 | |
869 | int disorder_eclient_play(disorder_eclient *c, |
870 | const char *track, |
871 | disorder_eclient_no_response *completed, |
872 | void *v) { |
873 | return simple(c, no_response_opcallback, (void (*)())completed, v, |
874 | "play", track, (char *)0); |
875 | } |
876 | |
877 | int disorder_eclient_pause(disorder_eclient *c, |
878 | disorder_eclient_no_response *completed, |
879 | void *v) { |
880 | return simple(c, no_response_opcallback, (void (*)())completed, v, |
881 | "pause", (char *)0); |
882 | } |
883 | |
884 | int disorder_eclient_resume(disorder_eclient *c, |
885 | disorder_eclient_no_response *completed, |
886 | void *v) { |
887 | return simple(c, no_response_opcallback, (void (*)())completed, v, |
888 | "resume", (char *)0); |
889 | } |
890 | |
891 | int disorder_eclient_scratch(disorder_eclient *c, |
892 | const char *id, |
893 | disorder_eclient_no_response *completed, |
894 | void *v) { |
895 | return simple(c, no_response_opcallback, (void (*)())completed, v, |
896 | "scratch", id, (char *)0); |
897 | } |
898 | |
899 | int disorder_eclient_scratch_playing(disorder_eclient *c, |
900 | disorder_eclient_no_response *completed, |
901 | void *v) { |
902 | return disorder_eclient_scratch(c, 0, completed, v); |
903 | } |
904 | |
905 | int disorder_eclient_remove(disorder_eclient *c, |
906 | const char *id, |
907 | disorder_eclient_no_response *completed, |
908 | void *v) { |
909 | return simple(c, no_response_opcallback, (void (*)())completed, v, |
910 | "remove", id, (char *)0); |
911 | } |
912 | |
913 | int disorder_eclient_moveafter(disorder_eclient *c, |
914 | const char *target, |
915 | int nids, |
916 | const char **ids, |
917 | disorder_eclient_no_response *completed, |
918 | void *v) { |
919 | struct vector vec; |
920 | int n; |
921 | |
922 | vector_init(&vec); |
923 | vector_append(&vec, (char *)"moveafter"); |
924 | vector_append(&vec, (char *)target); |
925 | for(n = 0; n < nids; ++n) |
926 | vector_append(&vec, (char *)ids[n]); |
927 | stash_command_vector(c, 0/*queuejump*/, no_response_opcallback, completed, v, |
928 | vec.nvec, vec.vec); |
929 | disorder_eclient_polled(c, 0); |
930 | return 0; |
931 | } |
932 | |
933 | int disorder_eclient_recent(disorder_eclient *c, |
934 | disorder_eclient_queue_response *completed, |
935 | void *v) { |
936 | return simple(c, queue_response_opcallback, (void (*)())completed, v, |
937 | "recent", (char *)0); |
938 | } |
939 | |
940 | int disorder_eclient_queue(disorder_eclient *c, |
941 | disorder_eclient_queue_response *completed, |
942 | void *v) { |
943 | return simple(c, queue_response_opcallback, (void (*)())completed, v, |
944 | "queue", (char *)0); |
945 | } |
946 | |
947 | int disorder_eclient_files(disorder_eclient *c, |
948 | disorder_eclient_list_response *completed, |
949 | const char *dir, |
950 | const char *re, |
951 | void *v) { |
952 | return simple(c, list_response_opcallback, (void (*)())completed, v, |
953 | "files", dir, re, (char *)0); |
954 | } |
955 | |
956 | int disorder_eclient_dirs(disorder_eclient *c, |
957 | disorder_eclient_list_response *completed, |
958 | const char *dir, |
959 | const char *re, |
960 | void *v) { |
961 | return simple(c, list_response_opcallback, (void (*)())completed, v, |
962 | "dirs", dir, re, (char *)0); |
963 | } |
964 | |
965 | int disorder_eclient_playing(disorder_eclient *c, |
966 | disorder_eclient_queue_response *completed, |
967 | void *v) { |
968 | return simple(c, playing_response_opcallback, (void (*)())completed, v, |
969 | "playing", (char *)0); |
970 | } |
971 | |
972 | int disorder_eclient_length(disorder_eclient *c, |
973 | disorder_eclient_integer_response *completed, |
974 | const char *track, |
975 | void *v) { |
976 | return simple(c, integer_response_opcallback, (void (*)())completed, v, |
977 | "length", track, (char *)0); |
978 | } |
979 | |
980 | int disorder_eclient_volume(disorder_eclient *c, |
981 | disorder_eclient_volume_response *completed, |
982 | int l, int r, |
983 | void *v) { |
984 | char sl[64], sr[64]; |
985 | |
986 | if(l < 0 && r < 0) { |
987 | return simple(c, volume_response_opcallback, (void (*)())completed, v, |
988 | "volume", (char *)0); |
989 | } else if(l >= 0 && r >= 0) { |
990 | assert(l <= 100); |
991 | assert(r <= 100); |
992 | byte_snprintf(sl, sizeof sl, "%d", l); |
993 | byte_snprintf(sr, sizeof sr, "%d", r); |
994 | return simple(c, volume_response_opcallback, (void (*)())completed, v, |
995 | "volume", sl, sr, (char *)0); |
996 | } else { |
997 | assert(!"invalid arguments to disorder_eclient_volume"); |
998 | return -1; /* gcc is being dim */ |
999 | } |
1000 | } |
1001 | |
1002 | int disorder_eclient_enable(disorder_eclient *c, |
1003 | disorder_eclient_no_response *completed, |
1004 | void *v) { |
1005 | return simple(c, no_response_opcallback, (void (*)())completed, v, |
1006 | "enable", (char *)0); |
1007 | } |
1008 | |
1009 | int disorder_eclient_disable(disorder_eclient *c, |
1010 | disorder_eclient_no_response *completed, |
1011 | void *v){ |
1012 | return simple(c, no_response_opcallback, (void (*)())completed, v, |
1013 | "disable", (char *)0); |
1014 | } |
1015 | |
1016 | int disorder_eclient_random_enable(disorder_eclient *c, |
1017 | disorder_eclient_no_response *completed, |
1018 | void *v){ |
1019 | return simple(c, no_response_opcallback, (void (*)())completed, v, |
1020 | "random-enable", (char *)0); |
1021 | } |
1022 | |
1023 | int disorder_eclient_random_disable(disorder_eclient *c, |
1024 | disorder_eclient_no_response *completed, |
1025 | void *v){ |
1026 | return simple(c, no_response_opcallback, (void (*)())completed, v, |
1027 | "random-disable", (char *)0); |
1028 | } |
1029 | |
1030 | int disorder_eclient_get(disorder_eclient *c, |
1031 | disorder_eclient_string_response *completed, |
1032 | const char *track, const char *pref, |
1033 | void *v) { |
1034 | return simple(c, string_response_opcallback, (void (*)())completed, v, |
1035 | "get", track, pref, (char *)0); |
1036 | } |
1037 | |
1038 | int disorder_eclient_set(disorder_eclient *c, |
1039 | disorder_eclient_no_response *completed, |
1040 | const char *track, const char *pref, |
1041 | const char *value, |
1042 | void *v) { |
1043 | return simple(c, no_response_opcallback, (void (*)())completed, v, |
1044 | "set", track, pref, value, (char *)0); |
1045 | } |
1046 | |
1047 | int disorder_eclient_unset(disorder_eclient *c, |
1048 | disorder_eclient_no_response *completed, |
1049 | const char *track, const char *pref, |
1050 | void *v) { |
1051 | return simple(c, no_response_opcallback, (void (*)())completed, v, |
1052 | "unset", track, pref, (char *)0); |
1053 | } |
1054 | |
1055 | int disorder_eclient_resolve(disorder_eclient *c, |
1056 | disorder_eclient_string_response *completed, |
1057 | const char *track, |
1058 | void *v) { |
1059 | return simple(c, string_response_opcallback, (void (*)())completed, v, |
1060 | "resolve", track, (char *)0); |
1061 | } |
1062 | |
1063 | int disorder_eclient_search(disorder_eclient *c, |
1064 | disorder_eclient_list_response *completed, |
1065 | const char *terms, |
1066 | void *v) { |
1067 | if(!split(terms, 0, SPLIT_QUOTES, 0, 0)) return -1; |
1068 | return simple(c, list_response_opcallback, (void (*)())completed, v, |
1069 | "search", terms, (char *)0); |
1070 | } |
1071 | |
1072 | /* Log clients ***************************************************************/ |
1073 | |
1074 | int disorder_eclient_log(disorder_eclient *c, |
1075 | const disorder_eclient_log_callbacks *callbacks, |
1076 | void *v) { |
1077 | if(c->log_callbacks) return -1; |
1078 | c->log_callbacks = callbacks; |
1079 | c->log_v = v; |
1080 | stash_command(c, 0/*queuejump*/, log_opcallback, 0/*completed*/, v, |
1081 | "log", (char *)0); |
1082 | return 0; |
1083 | } |
1084 | |
1085 | /* If we get here we've stopped being a log client */ |
1086 | static void log_opcallback(disorder_eclient *c, |
1087 | struct operation attribute((unused)) *op) { |
1088 | D(("log_opcallback")); |
1089 | c->log_callbacks = 0; |
1090 | c->log_v = 0; |
1091 | } |
1092 | |
1093 | /* error callback for log line parsing */ |
1094 | static void logline_error(const char *msg, void *u) { |
1095 | disorder_eclient *c = u; |
1096 | protocol_error(c, c->ops, -1, "error parsing log line: %s", msg); |
1097 | } |
1098 | |
1099 | /* process a single log line */ |
1100 | static void logline(disorder_eclient *c, const char *line) { |
1101 | int nvec, n; |
1102 | char **vec; |
1103 | uintmax_t when; |
1104 | |
1105 | D(("log_opcallback [%s]", line)); |
1106 | vec = split(line, &nvec, SPLIT_QUOTES, logline_error, c); |
1107 | if(nvec < 2) return; /* probably an error, already |
1108 | * reported */ |
1109 | if(sscanf(vec[0], "%"SCNxMAX, &when) != 1) { |
1110 | /* probably the wrong side of a format change */ |
1111 | protocol_error(c, c->ops, -1, "invalid log timestamp '%s'", vec[0]); |
1112 | return; |
1113 | } |
1114 | /* TODO: do something with the time */ |
1115 | n = TABLE_FIND(logentry_handlers, struct logentry_handler, name, vec[1]); |
1116 | if(n < 0) return; /* probably a future command */ |
1117 | vec += 2; |
1118 | nvec -= 2; |
1119 | if(nvec < logentry_handlers[n].min || nvec > logentry_handlers[n].max) |
1120 | return; |
1121 | logentry_handlers[n].handler(c, nvec, vec); |
1122 | } |
1123 | |
1124 | static void logentry_completed(disorder_eclient *c, |
1125 | int attribute((unused)) nvec, char **vec) { |
1126 | if(!c->log_callbacks->completed) return; |
1127 | c->log_callbacks->completed(c->log_v, vec[0]); |
1128 | } |
1129 | |
1130 | static void logentry_failed(disorder_eclient *c, |
1131 | int attribute((unused)) nvec, char **vec) { |
1132 | if(!c->log_callbacks->failed)return; |
1133 | c->log_callbacks->failed(c->log_v, vec[0], vec[1]); |
1134 | } |
1135 | |
1136 | static void logentry_moved(disorder_eclient *c, |
1137 | int attribute((unused)) nvec, char **vec) { |
1138 | if(!c->log_callbacks->moved) return; |
1139 | c->log_callbacks->moved(c->log_v, vec[0]); |
1140 | } |
1141 | |
1142 | static void logentry_playing(disorder_eclient *c, |
1143 | int attribute((unused)) nvec, char **vec) { |
1144 | if(!c->log_callbacks->playing) return; |
1145 | c->log_callbacks->playing(c->log_v, vec[0], vec[1]); |
1146 | } |
1147 | |
1148 | static void logentry_queue(disorder_eclient *c, |
1149 | int attribute((unused)) nvec, char **vec) { |
1150 | struct queue_entry *q; |
1151 | |
1152 | if(!c->log_callbacks->completed) return; |
1153 | q = xmalloc(sizeof *q); |
1154 | if(queue_unmarshall_vec(q, nvec, vec, eclient_queue_error, c)) |
1155 | return; /* bogus */ |
1156 | c->log_callbacks->queue(c->log_v, q); |
1157 | } |
1158 | |
1159 | static void logentry_recent_added(disorder_eclient *c, |
1160 | int attribute((unused)) nvec, char **vec) { |
1161 | struct queue_entry *q; |
1162 | |
1163 | if(!c->log_callbacks->recent_added) return; |
1164 | q = xmalloc(sizeof *q); |
1165 | if(queue_unmarshall_vec(q, nvec, vec, eclient_queue_error, c)) |
1166 | return; /* bogus */ |
1167 | c->log_callbacks->recent_added(c->log_v, q); |
1168 | } |
1169 | |
1170 | static void logentry_recent_removed(disorder_eclient *c, |
1171 | int attribute((unused)) nvec, char **vec) { |
1172 | if(!c->log_callbacks->recent_removed) return; |
1173 | c->log_callbacks->recent_removed(c->log_v, vec[0]); |
1174 | } |
1175 | |
1176 | static void logentry_removed(disorder_eclient *c, |
1177 | int attribute((unused)) nvec, char **vec) { |
1178 | if(!c->log_callbacks->removed) return; |
1179 | c->log_callbacks->removed(c->log_v, vec[0], vec[1]); |
1180 | } |
1181 | |
1182 | static void logentry_scratched(disorder_eclient *c, |
1183 | int attribute((unused)) nvec, char **vec) { |
1184 | if(!c->log_callbacks->scratched) return; |
1185 | c->log_callbacks->scratched(c->log_v, vec[0], vec[1]); |
1186 | } |
1187 | |
1188 | static const struct { |
1189 | unsigned long bit; |
1190 | const char *enable; |
1191 | const char *disable; |
1192 | } statestrings[] = { |
1193 | { DISORDER_PLAYING_ENABLED, "enable_play", "disable_play" }, |
1194 | { DISORDER_RANDOM_ENABLED, "enable_random", "disable_random" }, |
1195 | { DISORDER_TRACK_PAUSED, "pause", "resume" }, |
1196 | }; |
1197 | #define NSTATES (int)(sizeof states / sizeof *states) |
1198 | |
1199 | static void logentry_state(disorder_eclient *c, |
1200 | int attribute((unused)) nvec, char **vec) { |
1201 | int n; |
1202 | |
1203 | for(n = 0; n < NSTATES; ++n) |
1204 | if(!strcmp(vec[0], statestrings[n].enable)) { |
1205 | c->statebits |= statestrings[n].bit; |
1206 | break; |
1207 | } else if(!strcmp(vec[0], statestrings[n].disable)) { |
1208 | c->statebits &= ~statestrings[n].bit; |
1209 | break; |
1210 | } |
1211 | if(!c->log_callbacks->state) return; |
1212 | c->log_callbacks->state(c->log_v, c->statebits); |
1213 | } |
1214 | |
1215 | static void logentry_volume(disorder_eclient *c, |
1216 | int attribute((unused)) nvec, char **vec) { |
1217 | long l, r; |
1218 | |
1219 | if(!c->log_callbacks->volume) return; |
1220 | if(xstrtol(&l, vec[0], 0, 10) |
1221 | || xstrtol(&r, vec[1], 0, 10) |
1222 | || l < 0 || l > INT_MAX |
1223 | || r < 0 || r > INT_MAX) |
1224 | return; /* bogus */ |
1225 | c->log_callbacks->volume(c->log_v, (int)l, (int)r); |
1226 | } |
1227 | |
1228 | /* |
1229 | Local Variables: |
1230 | c-basic-offset:2 |
1231 | comment-column:40 |
1232 | fill-column:79 |
1233 | indent-tabs-mode:nil |
1234 | End: |
1235 | */ |