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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 | */ | |
0e4472a0 | 20 | /** @file lib/eclient.c |
21 | * @brief Client code for event-driven programs | |
22 | */ | |
460b9539 | 23 | |
24 | #include <config.h> | |
25 | #include "types.h" | |
26 | ||
27 | #include <sys/types.h> | |
28 | #include <sys/socket.h> | |
29 | #include <netinet/in.h> | |
30 | #include <sys/un.h> | |
31 | #include <string.h> | |
32 | #include <stdio.h> | |
33 | #include <unistd.h> | |
34 | #include <errno.h> | |
35 | #include <netdb.h> | |
36 | #include <stdlib.h> | |
37 | #include <assert.h> | |
38 | #include <inttypes.h> | |
39 | #include <stddef.h> | |
40 | ||
41 | #include "log.h" | |
42 | #include "mem.h" | |
43 | #include "configuration.h" | |
44 | #include "queue.h" | |
45 | #include "eclient.h" | |
46 | #include "charset.h" | |
47 | #include "hex.h" | |
48 | #include "split.h" | |
49 | #include "vector.h" | |
50 | #include "inputline.h" | |
51 | #include "kvp.h" | |
52 | #include "syscalls.h" | |
53 | #include "printf.h" | |
54 | #include "addr.h" | |
55 | #include "authhash.h" | |
56 | #include "table.h" | |
57 | #include "client-common.h" | |
58 | ||
59 | /* TODO: more commands */ | |
60 | ||
61 | /* Types *********************************************************************/ | |
62 | ||
0e4472a0 | 63 | /** @brief Client state */ |
460b9539 | 64 | enum client_state { |
0e4472a0 | 65 | state_disconnected, /**< @brief not connected */ |
66 | state_connecting, /**< @brief waiting for connect() */ | |
67 | state_connected, /**< @brief connected but not authenticated */ | |
68 | state_idle, /**< @brief not doing anything */ | |
69 | state_cmdresponse, /**< @brief waiting for command resonse */ | |
70 | state_body, /**< @brief accumulating body */ | |
71 | state_log, /**< @brief monitoring log */ | |
460b9539 | 72 | }; |
73 | ||
0e4472a0 | 74 | /** @brief Names for @ref client_state */ |
460b9539 | 75 | static const char *const states[] = { |
76 | "disconnected", | |
77 | "connecting", | |
78 | "connected", | |
79 | "idle", | |
80 | "cmdresponse", | |
81 | "body", | |
82 | "log" | |
83 | }; | |
84 | ||
85 | struct operation; /* forward decl */ | |
86 | ||
0e4472a0 | 87 | /** @brief Type of an operation callback */ |
460b9539 | 88 | typedef void operation_callback(disorder_eclient *c, struct operation *op); |
89 | ||
0e4472a0 | 90 | /** @brief A pending operation. |
91 | * | |
92 | * This can be either a command or part of the authentication protocol. In the | |
93 | * former case new commands are appended to the list, in the latter case they | |
94 | * are inserted at the front. */ | |
460b9539 | 95 | struct operation { |
0e4472a0 | 96 | struct operation *next; /**< @brief next operation */ |
97 | char *cmd; /**< @brief command to send or 0 */ | |
98 | operation_callback *opcallback; /**< @brief internal completion callback */ | |
99 | void (*completed)(); /**< @brief user completion callback or 0 */ | |
100 | void *v; /**< @brief data for COMPLETED */ | |
101 | disorder_eclient *client; /**< @brief owning client */ | |
102 | int sent; /**< @brief true if sent to server */ | |
460b9539 | 103 | }; |
104 | ||
0e4472a0 | 105 | /** @brief Client structure */ |
460b9539 | 106 | struct disorder_eclient { |
107 | const char *ident; | |
0e4472a0 | 108 | int fd; /**< @brief connection to server */ |
109 | enum client_state state; /**< @brief current state */ | |
110 | int authenticated; /**< @brief true when authenicated */ | |
111 | struct dynstr output; /**< @brief output buffer */ | |
112 | struct dynstr input; /**< @brief input buffer */ | |
113 | int eof; /**< @brief input buffer is at EOF */ | |
114 | const disorder_eclient_callbacks *callbacks; /**< @brief error callbacks */ | |
115 | void *u; /**< @brief user data */ | |
116 | struct operation *ops; /**< @brief queue of operations */ | |
117 | struct operation **opstail; /**< @brief queue tail */ | |
460b9539 | 118 | /* accumulated response */ |
0e4472a0 | 119 | int rc; /**< @brief response code */ |
120 | char *line; /**< @brief complete line */ | |
121 | struct vector vec; /**< @brief body */ | |
122 | const disorder_eclient_log_callbacks *log_callbacks; /**< @brief log callbacks */ | |
123 | void *log_v; /**< @brief user data */ | |
124 | unsigned long statebits; /**< @brief current state */ | |
460b9539 | 125 | }; |
126 | ||
127 | /* Forward declarations ******************************************************/ | |
128 | ||
129 | static int start_connect(void *cc, | |
130 | const struct sockaddr *sa, | |
131 | socklen_t len, | |
132 | const char *ident); | |
133 | static void process_line(disorder_eclient *c, char *line); | |
134 | static int start_connect(void *cc, | |
135 | const struct sockaddr *sa, | |
136 | socklen_t len, | |
137 | const char *ident); | |
138 | static void maybe_connected(disorder_eclient *c); | |
139 | static void authbanner_opcallback(disorder_eclient *c, | |
140 | struct operation *op); | |
141 | static void authuser_opcallback(disorder_eclient *c, | |
142 | struct operation *op); | |
143 | static void complete(disorder_eclient *c); | |
144 | static void send_output(disorder_eclient *c); | |
145 | static void put(disorder_eclient *c, const char *s, size_t n); | |
146 | static void read_input(disorder_eclient *c); | |
147 | static void stash_command(disorder_eclient *c, | |
148 | int queuejump, | |
149 | operation_callback *opcallback, | |
150 | void (*completed)(), | |
151 | void *v, | |
152 | const char *cmd, | |
153 | ...); | |
154 | static void log_opcallback(disorder_eclient *c, struct operation *op); | |
155 | static void logline(disorder_eclient *c, const char *line); | |
156 | static void logentry_completed(disorder_eclient *c, int nvec, char **vec); | |
157 | static void logentry_failed(disorder_eclient *c, int nvec, char **vec); | |
158 | static void logentry_moved(disorder_eclient *c, int nvec, char **vec); | |
159 | static void logentry_playing(disorder_eclient *c, int nvec, char **vec); | |
160 | static void logentry_queue(disorder_eclient *c, int nvec, char **vec); | |
161 | static void logentry_recent_added(disorder_eclient *c, int nvec, char **vec); | |
162 | static void logentry_recent_removed(disorder_eclient *c, int nvec, char **vec); | |
163 | static void logentry_removed(disorder_eclient *c, int nvec, char **vec); | |
164 | static void logentry_scratched(disorder_eclient *c, int nvec, char **vec); | |
165 | static void logentry_state(disorder_eclient *c, int nvec, char **vec); | |
166 | static void logentry_volume(disorder_eclient *c, int nvec, char **vec); | |
167 | ||
168 | /* Tables ********************************************************************/ | |
169 | ||
0e4472a0 | 170 | /** @brief One possible log entry */ |
171 | struct logentry_handler { | |
172 | const char *name; /**< @brief Entry name */ | |
173 | int min; /**< @brief Minimum arguments */ | |
174 | int max; /**< @brief Maximum arguments */ | |
460b9539 | 175 | void (*handler)(disorder_eclient *c, |
176 | int nvec, | |
0e4472a0 | 177 | char **vec); /**< @brief Handler function */ |
178 | }; | |
179 | ||
180 | /** @brief Table for parsing log entries */ | |
181 | static const struct logentry_handler logentry_handlers[] = { | |
460b9539 | 182 | #define LE(X, MIN, MAX) { #X, MIN, MAX, logentry_##X } |
183 | LE(completed, 1, 1), | |
184 | LE(failed, 2, 2), | |
185 | LE(moved, 1, 1), | |
186 | LE(playing, 1, 2), | |
187 | LE(queue, 2, INT_MAX), | |
188 | LE(recent_added, 2, INT_MAX), | |
189 | LE(recent_removed, 1, 1), | |
190 | LE(removed, 1, 2), | |
191 | LE(scratched, 2, 2), | |
192 | LE(state, 1, 1), | |
193 | LE(volume, 2, 2) | |
194 | }; | |
195 | ||
196 | /* Setup and teardown ********************************************************/ | |
197 | ||
0e4472a0 | 198 | /** @brief Create a new client |
199 | * | |
200 | * Does NOT connect the client - connections are made (and re-made) on demand. | |
201 | */ | |
460b9539 | 202 | disorder_eclient *disorder_eclient_new(const disorder_eclient_callbacks *cb, |
203 | void *u) { | |
204 | disorder_eclient *c = xmalloc(sizeof *c); | |
205 | D(("disorder_eclient_new")); | |
206 | c->fd = -1; | |
207 | c->callbacks = cb; | |
208 | c->u = u; | |
209 | c->opstail = &c->ops; | |
210 | vector_init(&c->vec); | |
211 | dynstr_init(&c->input); | |
212 | dynstr_init(&c->output); | |
1c0d78bd RK |
213 | if(!config->password) { |
214 | error(0, "no password set"); | |
215 | return 0; | |
216 | } | |
460b9539 | 217 | return c; |
218 | } | |
219 | ||
0e4472a0 | 220 | /** @brief Disconnect a client */ |
460b9539 | 221 | void disorder_eclient_close(disorder_eclient *c) { |
222 | struct operation *op; | |
223 | ||
224 | D(("disorder_eclient_close")); | |
225 | if(c->fd != -1) { | |
226 | D(("disorder_eclient_close closing fd %d", c->fd)); | |
227 | c->callbacks->poll(c->u, c, c->fd, 0); | |
228 | xclose(c->fd); | |
229 | c->fd = -1; | |
230 | c->state = state_disconnected; | |
231 | } | |
232 | c->output.nvec = 0; | |
233 | c->input.nvec = 0; | |
234 | c->eof = 0; | |
235 | c->authenticated = 0; | |
236 | /* We'll need to resend all operations */ | |
237 | for(op = c->ops; op; op = op->next) | |
238 | op->sent = 0; | |
239 | } | |
240 | ||
241 | /* Error reporting ***********************************************************/ | |
242 | ||
0e4472a0 | 243 | /** @brief called when a connection error occurs */ |
460b9539 | 244 | static int comms_error(disorder_eclient *c, const char *fmt, ...) { |
245 | va_list ap; | |
246 | char *s; | |
247 | ||
248 | D(("comms_error")); | |
249 | va_start(ap, fmt); | |
250 | byte_xvasprintf(&s, fmt, ap); | |
251 | va_end(ap); | |
252 | disorder_eclient_close(c); | |
253 | c->callbacks->comms_error(c->u, s); | |
254 | return -1; | |
255 | } | |
256 | ||
0e4472a0 | 257 | /** @brief called when the server reports an error */ |
460b9539 | 258 | static int protocol_error(disorder_eclient *c, struct operation *op, |
259 | int code, const char *fmt, ...) { | |
260 | va_list ap; | |
261 | char *s; | |
262 | ||
263 | D(("protocol_error")); | |
264 | va_start(ap, fmt); | |
265 | byte_xvasprintf(&s, fmt, ap); | |
266 | va_end(ap); | |
267 | c->callbacks->protocol_error(c->u, op->v, code, s); | |
268 | return -1; | |
269 | } | |
270 | ||
271 | /* State machine *************************************************************/ | |
272 | ||
0e4472a0 | 273 | /** @brief Called when there's something to do |
274 | * @param c Client | |
275 | * @param mode bitmap of @ref DISORDER_POLL_READ and/or @ref DISORDER_POLL_WRITE. | |
276 | * | |
277 | * This should be called from by your code when the file descriptor is readable | |
278 | * or writable (as requested by the @c poll callback, see @ref | |
279 | * disorder_eclient_callbacks) and in any case from time to time (with @p mode | |
280 | * = 0) to allow for retries to work. | |
281 | */ | |
460b9539 | 282 | void disorder_eclient_polled(disorder_eclient *c, unsigned mode) { |
283 | struct operation *op; | |
284 | ||
285 | D(("disorder_eclient_polled fd=%d state=%s mode=[%s %s]", | |
286 | c->fd, states[c->state], | |
287 | mode & DISORDER_POLL_READ ? "READ" : "", | |
288 | mode & DISORDER_POLL_WRITE ? "WRITE" : "")); | |
289 | /* The pattern here is to check each possible state in turn and try to | |
290 | * advance (though on error we might go back). If we advance we leave open | |
291 | * the possibility of falling through to the next state, but we set the mode | |
292 | * bits to 0, to avoid false positives (which matter more in some cases than | |
293 | * others). */ | |
294 | ||
295 | if(c->state == state_disconnected) { | |
296 | D(("state_disconnected")); | |
297 | with_sockaddr(c, start_connect); | |
298 | /* might now be state_disconnected (on error), state_connecting (slow | |
299 | * connect) or state_connected (fast connect). If state_disconnected then | |
300 | * we just rely on a periodic callback from the event loop sometime. */ | |
301 | mode = 0; | |
302 | } | |
303 | ||
304 | if(c->state == state_connecting && mode) { | |
305 | D(("state_connecting")); | |
306 | maybe_connected(c); | |
307 | /* Might be state_disconnected (on error) or state_connected (on success). | |
308 | * In the former case we rely on the event loop for a periodic callback to | |
309 | * retry. */ | |
310 | mode = 0; | |
311 | } | |
312 | ||
313 | if(c->state == state_connected) { | |
314 | D(("state_connected")); | |
315 | /* We just connected. Initiate the authentication protocol. */ | |
316 | stash_command(c, 1/*queuejump*/, authbanner_opcallback, | |
317 | 0/*completed*/, 0/*v*/, 0/*cmd*/); | |
318 | /* We never stay is state_connected very long. We could in principle jump | |
319 | * straight to state_cmdresponse since there's actually no command to | |
320 | * send, but that would arguably be cheating. */ | |
321 | c->state = state_idle; | |
322 | } | |
323 | ||
324 | if(c->state == state_idle) { | |
325 | D(("state_idle")); | |
326 | /* We are connected, and have finished any command we set off, look for | |
327 | * some work to do */ | |
328 | if(c->ops) { | |
329 | D(("have ops")); | |
330 | if(c->authenticated) { | |
331 | /* Transmit all unsent operations */ | |
332 | for(op = c->ops; op; op = op->next) { | |
333 | if(!op->sent) { | |
334 | put(c, op->cmd, strlen(op->cmd)); | |
335 | op->sent = 1; | |
336 | } | |
337 | } | |
338 | } else { | |
339 | /* Just send the head operation */ | |
340 | if(c->ops->cmd && !c->ops->sent) { | |
341 | put(c, c->ops->cmd, strlen(c->ops->cmd)); | |
342 | c->ops->sent = 1; | |
343 | } | |
344 | } | |
345 | /* Awaiting response for the operation at the head of the list */ | |
346 | c->state = state_cmdresponse; | |
347 | } else | |
348 | /* genuinely idle */ | |
349 | c->callbacks->report(c->u, 0); | |
350 | } | |
351 | ||
352 | if(c->state == state_cmdresponse | |
353 | || c->state == state_body | |
354 | || c->state == state_log) { | |
355 | D(("state_%s", states[c->state])); | |
356 | /* We are awaiting a response */ | |
357 | if(mode & DISORDER_POLL_WRITE) send_output(c); | |
358 | if(mode & DISORDER_POLL_READ) read_input(c); | |
359 | /* There are a couple of reasons we might want to re-enter the state | |
360 | * machine from the top. state_idle is obvious: there may be further | |
361 | * commands to process. Re-entering on state_disconnected means that we | |
362 | * immediately retry connection if a comms error occurs during a command. | |
363 | * This is different to the case where a connection fails, where we await a | |
364 | * spontaneous call to initiate the retry. */ | |
365 | switch(c->state) { | |
366 | case state_disconnected: /* lost connection */ | |
367 | case state_idle: /* completed a command */ | |
368 | D(("retrying")); | |
369 | disorder_eclient_polled(c, 0); | |
370 | return; | |
371 | default: | |
372 | break; | |
373 | } | |
374 | } | |
375 | ||
376 | /* Figure out what to set the mode to */ | |
377 | switch(c->state) { | |
378 | case state_disconnected: | |
379 | D(("state_disconnected (2)")); | |
380 | /* Probably an error occurred. Await a retry. */ | |
381 | mode = 0; | |
382 | break; | |
383 | case state_connecting: | |
384 | D(("state_connecting (2)")); | |
385 | /* Waiting for connect to complete */ | |
386 | mode = DISORDER_POLL_READ|DISORDER_POLL_WRITE; | |
387 | break; | |
388 | case state_connected: | |
389 | D(("state_connected (2)")); | |
390 | assert(!"should never be in state_connected here"); | |
391 | break; | |
392 | case state_idle: | |
393 | D(("state_idle (2)")); | |
394 | /* Connected but nothing to do. */ | |
395 | mode = 0; | |
396 | break; | |
397 | case state_cmdresponse: | |
398 | case state_body: | |
399 | case state_log: | |
400 | D(("state_%s (2)", states[c->state])); | |
401 | /* Gathering a response. Wait for input. */ | |
402 | mode = DISORDER_POLL_READ; | |
403 | /* Flush any pending output. */ | |
404 | if(c->output.nvec) mode |= DISORDER_POLL_WRITE; | |
405 | break; | |
406 | } | |
407 | D(("fd=%d new mode [%s %s]", | |
408 | c->fd, | |
409 | mode & DISORDER_POLL_READ ? "READ" : "", | |
410 | mode & DISORDER_POLL_WRITE ? "WRITE" : "")); | |
411 | if(c->fd != -1) c->callbacks->poll(c->u, c, c->fd, mode); | |
412 | } | |
413 | ||
0e4472a0 | 414 | /** @brief Called to start connecting */ |
460b9539 | 415 | static int start_connect(void *cc, |
416 | const struct sockaddr *sa, | |
417 | socklen_t len, | |
418 | const char *ident) { | |
419 | disorder_eclient *c = cc; | |
420 | ||
421 | D(("start_connect")); | |
422 | c->ident = xstrdup(ident); | |
423 | if(c->fd != -1) { | |
424 | xclose(c->fd); | |
425 | c->fd = -1; | |
426 | } | |
427 | if((c->fd = socket(sa->sa_family, SOCK_STREAM, 0)) < 0) | |
428 | return comms_error(c, "socket: %s", strerror(errno)); | |
429 | c->eof = 0; | |
430 | nonblock(c->fd); | |
431 | if(connect(c->fd, sa, len) < 0) { | |
432 | switch(errno) { | |
433 | case EINTR: | |
434 | case EINPROGRESS: | |
435 | c->state = state_connecting; | |
436 | /* We are called from _polled so the state machine will get to do its | |
437 | * thing */ | |
438 | return 0; | |
439 | default: | |
440 | /* Signal the error to the caller. */ | |
441 | return comms_error(c, "connecting to %s: %s", ident, strerror(errno)); | |
442 | } | |
443 | } else | |
444 | c->state = state_connected; | |
445 | return 0; | |
446 | } | |
447 | ||
0e4472a0 | 448 | /** @brief Called when maybe connected */ |
460b9539 | 449 | static void maybe_connected(disorder_eclient *c) { |
450 | /* We either connected, or got an error. */ | |
451 | int err; | |
452 | socklen_t len = sizeof err; | |
453 | ||
454 | D(("maybe_connected")); | |
455 | /* Work around over-enthusiastic error slippage */ | |
456 | if(getsockopt(c->fd, SOL_SOCKET, SO_ERROR, &err, &len) < 0) | |
457 | err = errno; | |
458 | if(err) { | |
459 | /* The connection failed */ | |
460 | comms_error(c, "connecting to %s: %s", c->ident, strerror(err)); | |
461 | /* sets state_disconnected */ | |
462 | } else { | |
463 | /* The connection succeeded */ | |
464 | c->state = state_connected; | |
465 | } | |
466 | } | |
467 | ||
468 | /* Authentication ************************************************************/ | |
469 | ||
470 | static void authbanner_opcallback(disorder_eclient *c, | |
471 | struct operation *op) { | |
472 | size_t nonce_len; | |
473 | const unsigned char *nonce; | |
474 | const char *res; | |
475 | ||
476 | D(("authbanner_opcallback")); | |
477 | if(c->rc / 100 != 2) { | |
478 | /* Banner told us to go away. We cannot proceed. */ | |
479 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); | |
480 | disorder_eclient_close(c); | |
481 | return; | |
482 | } | |
483 | nonce = unhex(c->line + 4, &nonce_len); | |
484 | res = authhash(nonce, nonce_len, config->password); | |
485 | stash_command(c, 1/*queuejump*/, authuser_opcallback, 0/*completed*/, 0/*v*/, | |
486 | "user", quoteutf8(config->username), quoteutf8(res), | |
487 | (char *)0); | |
488 | } | |
489 | ||
490 | static void authuser_opcallback(disorder_eclient *c, | |
491 | struct operation *op) { | |
492 | D(("authuser_opcallback")); | |
493 | if(c->rc / 100 != 2) { | |
494 | /* Wrong password or something. We cannot proceed. */ | |
495 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); | |
496 | disorder_eclient_close(c); | |
497 | return; | |
498 | } | |
499 | /* OK, we're authenticated now. */ | |
500 | c->authenticated = 1; | |
501 | if(c->log_callbacks && !(c->ops && c->ops->opcallback == log_opcallback)) | |
502 | /* We are a log client, switch to logging mode */ | |
503 | stash_command(c, 0/*queuejump*/, log_opcallback, 0/*completed*/, c->log_v, | |
504 | "log", (char *)0); | |
505 | } | |
506 | ||
507 | /* Output ********************************************************************/ | |
508 | ||
509 | /* Chop N bytes off the front of a dynstr */ | |
510 | static void consume(struct dynstr *d, int n) { | |
511 | D(("consume %d", n)); | |
512 | assert(d->nvec >= n); | |
513 | memmove(d->vec, d->vec + n, d->nvec - n); | |
514 | d->nvec -= n; | |
515 | } | |
516 | ||
517 | /* Write some bytes */ | |
518 | static void put(disorder_eclient *c, const char *s, size_t n) { | |
519 | D(("put %d %.*s", c->fd, (int)n, s)); | |
520 | dynstr_append_bytes(&c->output, s, n); | |
521 | } | |
522 | ||
523 | /* Called when we can write to our FD, or at any other time */ | |
524 | static void send_output(disorder_eclient *c) { | |
525 | int n; | |
526 | ||
527 | D(("send_output %d bytes pending", c->output.nvec)); | |
528 | if(c->state > state_connecting && c->output.nvec) { | |
529 | n = write(c->fd, c->output.vec, c->output.nvec); | |
530 | if(n < 0) { | |
531 | switch(errno) { | |
532 | case EINTR: | |
533 | case EAGAIN: | |
534 | break; | |
535 | default: | |
536 | comms_error(c, "writing to %s: %s", c->ident, strerror(errno)); | |
537 | break; | |
538 | } | |
539 | } else | |
540 | consume(&c->output, n); | |
541 | } | |
542 | } | |
543 | ||
544 | /* Input *********************************************************************/ | |
545 | ||
546 | /* Called when c->fd might be readable, or at any other time */ | |
547 | static void read_input(disorder_eclient *c) { | |
548 | char *nl; | |
549 | int n; | |
550 | char buffer[512]; | |
551 | ||
552 | D(("read_input in state %s", states[c->state])); | |
553 | if(c->state <= state_connected) return; /* ignore bogus calls */ | |
554 | /* read some more input */ | |
555 | n = read(c->fd, buffer, sizeof buffer); | |
556 | if(n < 0) { | |
557 | switch(errno) { | |
558 | case EINTR: | |
559 | case EAGAIN: | |
560 | break; | |
561 | default: | |
562 | comms_error(c, "reading from %s: %s", c->ident, strerror(errno)); | |
563 | break; | |
564 | } | |
565 | return; /* no new input to process */ | |
566 | } else if(n) { | |
567 | D(("read %d bytes: [%.*s]", n, n, buffer)); | |
568 | dynstr_append_bytes(&c->input, buffer, n); | |
569 | } else | |
570 | c->eof = 1; | |
571 | /* might have more than one line to process */ | |
572 | while(c->state > state_connecting | |
573 | && (nl = memchr(c->input.vec, '\n', c->input.nvec))) { | |
574 | process_line(c, xstrndup(c->input.vec, nl - c->input.vec)); | |
575 | /* we might have disconnected along the way, which zogs the input buffer */ | |
576 | if(c->state > state_connecting) | |
577 | consume(&c->input, (nl - c->input.vec) + 1); | |
578 | } | |
346ba8d5 | 579 | if(c->eof) { |
460b9539 | 580 | comms_error(c, "reading from %s: server disconnected", c->ident); |
346ba8d5 | 581 | c->authenticated = 0; |
582 | } | |
460b9539 | 583 | } |
584 | ||
585 | /* called with a line that has just been read */ | |
586 | static void process_line(disorder_eclient *c, char *line) { | |
587 | D(("process_line %d [%s]", c->fd, line)); | |
588 | switch(c->state) { | |
589 | case state_cmdresponse: | |
590 | /* This is the first line of a response */ | |
591 | if(!(line[0] >= '0' && line[0] <= '9' | |
592 | && line[1] >= '0' && line[1] <= '9' | |
593 | && line[2] >= '0' && line[2] <= '9' | |
594 | && line[3] == ' ')) | |
595 | fatal(0, "invalid response from server: %s", line); | |
596 | c->rc = (line[0] * 10 + line[1]) * 10 + line[2] - 111 * '0'; | |
597 | c->line = line; | |
598 | switch(c->rc % 10) { | |
599 | case 3: | |
600 | /* We need to collect the body. */ | |
601 | c->state = state_body; | |
602 | c->vec.nvec = 0; | |
603 | break; | |
604 | case 4: | |
605 | assert(c->log_callbacks != 0); | |
606 | if(c->log_callbacks->connected) | |
607 | c->log_callbacks->connected(c->log_v); | |
608 | c->state = state_log; | |
609 | break; | |
610 | default: | |
611 | /* We've got the whole response. Go into the idle state so the state | |
612 | * machine knows we're done and then call the operation callback. */ | |
613 | complete(c); | |
614 | break; | |
615 | } | |
616 | break; | |
617 | case state_body: | |
618 | if(strcmp(line, ".")) { | |
619 | /* A line from the body */ | |
620 | vector_append(&c->vec, line + (line[0] == '.')); | |
621 | } else { | |
622 | /* End of the body. */ | |
623 | vector_terminate(&c->vec); | |
624 | complete(c); | |
625 | } | |
626 | break; | |
627 | case state_log: | |
628 | if(strcmp(line, ".")) { | |
629 | logline(c, line + (line[0] == '.')); | |
630 | } else | |
631 | complete(c); | |
632 | break; | |
633 | default: | |
634 | assert(!"wrong state for location"); | |
635 | break; | |
636 | } | |
637 | } | |
638 | ||
639 | /* Called when an operation completes */ | |
640 | static void complete(disorder_eclient *c) { | |
641 | struct operation *op; | |
642 | ||
643 | D(("complete")); | |
644 | /* Pop the operation off the queue */ | |
645 | op = c->ops; | |
646 | c->ops = op->next; | |
647 | if(c->opstail == &op->next) | |
648 | c->opstail = &c->ops; | |
649 | /* If we've pipelined a command ahead then we go straight to cmdresponser. | |
650 | * Otherwise we go to idle, which will arrange further sends. */ | |
651 | c->state = c->ops && c->ops->sent ? state_cmdresponse : state_idle; | |
652 | op->opcallback(c, op); | |
653 | /* Note that we always call the opcallback even on error, though command | |
654 | * opcallbacks generally always do the same error handling, i.e. just call | |
655 | * protocol_error(). It's the auth* opcallbacks that have different | |
656 | * behaviour. */ | |
657 | } | |
658 | ||
659 | /* Operation setup ***********************************************************/ | |
660 | ||
661 | static void stash_command_vector(disorder_eclient *c, | |
662 | int queuejump, | |
663 | operation_callback *opcallback, | |
664 | void (*completed)(), | |
665 | void *v, | |
666 | int ncmd, | |
667 | char **cmd) { | |
668 | struct operation *op = xmalloc(sizeof *op); | |
669 | struct dynstr d; | |
670 | int n; | |
671 | ||
672 | if(cmd) { | |
673 | dynstr_init(&d); | |
674 | for(n = 0; n < ncmd; ++n) { | |
675 | if(n) | |
676 | dynstr_append(&d, ' '); | |
677 | dynstr_append_string(&d, quoteutf8(cmd[n])); | |
678 | } | |
679 | dynstr_append(&d, '\n'); | |
680 | dynstr_terminate(&d); | |
681 | op->cmd = d.vec; | |
682 | } else | |
683 | op->cmd = 0; /* usually, awaiting challenge */ | |
684 | op->opcallback = opcallback; | |
685 | op->completed = completed; | |
686 | op->v = v; | |
687 | op->next = 0; | |
688 | op->client = c; | |
689 | assert(op->sent == 0); | |
690 | if(queuejump) { | |
691 | /* Authentication operations jump the queue of useful commands */ | |
692 | op->next = c->ops; | |
693 | c->ops = op; | |
694 | if(c->opstail == &c->ops) | |
695 | c->opstail = &op->next; | |
696 | for(op = c->ops; op; op = op->next) | |
697 | assert(!op->sent); | |
698 | } else { | |
699 | *c->opstail = op; | |
700 | c->opstail = &op->next; | |
701 | } | |
702 | } | |
703 | ||
704 | static void vstash_command(disorder_eclient *c, | |
705 | int queuejump, | |
706 | operation_callback *opcallback, | |
707 | void (*completed)(), | |
708 | void *v, | |
709 | const char *cmd, va_list ap) { | |
710 | char *arg; | |
711 | struct vector vec; | |
712 | ||
713 | D(("vstash_command %s", cmd ? cmd : "NULL")); | |
714 | if(cmd) { | |
715 | vector_init(&vec); | |
716 | vector_append(&vec, (char *)cmd); | |
717 | while((arg = va_arg(ap, char *))) | |
718 | vector_append(&vec, arg); | |
719 | stash_command_vector(c, queuejump, opcallback, completed, v, | |
720 | vec.nvec, vec.vec); | |
721 | } else | |
722 | stash_command_vector(c, queuejump, opcallback, completed, v, 0, 0); | |
723 | } | |
724 | ||
725 | static void stash_command(disorder_eclient *c, | |
726 | int queuejump, | |
727 | operation_callback *opcallback, | |
728 | void (*completed)(), | |
729 | void *v, | |
730 | const char *cmd, | |
731 | ...) { | |
732 | va_list ap; | |
733 | ||
734 | va_start(ap, cmd); | |
735 | vstash_command(c, queuejump, opcallback, completed, v, cmd, ap); | |
736 | va_end(ap); | |
737 | } | |
738 | ||
739 | /* Command support ***********************************************************/ | |
740 | ||
741 | /* for commands with a simple string response */ | |
742 | static void string_response_opcallback(disorder_eclient *c, | |
743 | struct operation *op) { | |
744 | D(("string_response_callback")); | |
745 | if(c->rc / 100 == 2) { | |
746 | if(op->completed) | |
747 | ((disorder_eclient_string_response *)op->completed)(op->v, c->line + 4); | |
748 | } else | |
749 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); | |
750 | } | |
751 | ||
752 | /* for commands with a simple integer response */ | |
753 | static void integer_response_opcallback(disorder_eclient *c, | |
754 | struct operation *op) { | |
755 | D(("string_response_callback")); | |
756 | if(c->rc / 100 == 2) { | |
757 | if(op->completed) | |
758 | ((disorder_eclient_integer_response *)op->completed) | |
759 | (op->v, strtol(c->line + 4, 0, 10)); | |
760 | } else | |
761 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); | |
762 | } | |
763 | ||
764 | /* for commands with no response */ | |
765 | static void no_response_opcallback(disorder_eclient *c, | |
766 | struct operation *op) { | |
767 | D(("no_response_callback")); | |
768 | if(c->rc / 100 == 2) { | |
769 | if(op->completed) | |
770 | ((disorder_eclient_no_response *)op->completed)(op->v); | |
771 | } else | |
772 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); | |
773 | } | |
774 | ||
775 | /* error callback for queue_unmarshall */ | |
776 | static void eclient_queue_error(const char *msg, | |
777 | void *u) { | |
778 | struct operation *op = u; | |
779 | ||
780 | protocol_error(op->client, op, -1, "error parsing queue entry: %s", msg); | |
781 | } | |
782 | ||
783 | /* for commands that expect a queue dump */ | |
784 | static void queue_response_opcallback(disorder_eclient *c, | |
785 | struct operation *op) { | |
786 | int n; | |
787 | struct queue_entry *q, *qh = 0, **qtail = &qh, *qlast = 0; | |
788 | ||
789 | D(("queue_response_callback")); | |
790 | if(c->rc / 100 == 2) { | |
791 | /* parse the queue */ | |
792 | for(n = 0; n < c->vec.nvec; ++n) { | |
793 | q = xmalloc(sizeof *q); | |
794 | D(("queue_unmarshall %s", c->vec.vec[n])); | |
795 | if(!queue_unmarshall(q, c->vec.vec[n], eclient_queue_error, op)) { | |
796 | q->prev = qlast; | |
797 | *qtail = q; | |
798 | qtail = &q->next; | |
799 | qlast = q; | |
800 | } | |
801 | } | |
802 | if(op->completed) | |
803 | ((disorder_eclient_queue_response *)op->completed)(op->v, qh); | |
804 | } else | |
805 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); | |
806 | } | |
807 | ||
808 | /* for 'playing' */ | |
809 | static void playing_response_opcallback(disorder_eclient *c, | |
810 | struct operation *op) { | |
811 | struct queue_entry *q; | |
812 | ||
813 | D(("playing_response_callback")); | |
814 | if(c->rc / 100 == 2) { | |
815 | switch(c->rc % 10) { | |
816 | case 2: | |
817 | if(queue_unmarshall(q = xmalloc(sizeof *q), c->line + 4, | |
818 | eclient_queue_error, c)) | |
819 | return; | |
820 | break; | |
821 | case 9: | |
822 | q = 0; | |
823 | break; | |
824 | default: | |
825 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); | |
826 | return; | |
827 | } | |
828 | if(op->completed) | |
829 | ((disorder_eclient_queue_response *)op->completed)(op->v, q); | |
830 | } else | |
831 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); | |
832 | } | |
833 | ||
834 | /* for commands that expect a list of some sort */ | |
835 | static void list_response_opcallback(disorder_eclient *c, | |
836 | struct operation *op) { | |
837 | D(("list_response_callback")); | |
838 | if(c->rc / 100 == 2) { | |
839 | if(op->completed) | |
840 | ((disorder_eclient_list_response *)op->completed)(op->v, | |
841 | c->vec.nvec, | |
842 | c->vec.vec); | |
843 | } else | |
844 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); | |
845 | } | |
846 | ||
847 | /* for volume */ | |
848 | static void volume_response_opcallback(disorder_eclient *c, | |
849 | struct operation *op) { | |
850 | int l, r; | |
851 | ||
852 | D(("volume_response_callback")); | |
853 | if(c->rc / 100 == 2) { | |
854 | if(op->completed) { | |
855 | if(sscanf(c->line + 4, "%d %d", &l, &r) != 2 || l < 0 || r < 0) | |
856 | protocol_error(c, op, -1, "%s: invalid volume response: %s", | |
857 | c->ident, c->line); | |
858 | else | |
859 | ((disorder_eclient_volume_response *)op->completed)(op->v, l, r); | |
860 | } | |
861 | } else | |
862 | protocol_error(c, op, c->rc, "%s: %s", c->ident, c->line); | |
863 | } | |
864 | ||
865 | static int simple(disorder_eclient *c, | |
866 | operation_callback *opcallback, | |
867 | void (*completed)(), | |
868 | void *v, | |
869 | const char *cmd, ...) { | |
870 | va_list ap; | |
871 | ||
872 | va_start(ap, cmd); | |
873 | vstash_command(c, 0/*queuejump*/, opcallback, completed, v, cmd, ap); | |
874 | va_end(ap); | |
875 | /* Give the state machine a kick, since we might be in state_idle */ | |
876 | disorder_eclient_polled(c, 0); | |
877 | return 0; | |
878 | } | |
879 | ||
880 | /* Commands ******************************************************************/ | |
881 | ||
882 | int disorder_eclient_version(disorder_eclient *c, | |
883 | disorder_eclient_string_response *completed, | |
884 | void *v) { | |
885 | return simple(c, string_response_opcallback, (void (*)())completed, v, | |
886 | "version", (char *)0); | |
887 | } | |
888 | ||
889 | int disorder_eclient_namepart(disorder_eclient *c, | |
890 | disorder_eclient_string_response *completed, | |
891 | const char *track, | |
892 | const char *context, | |
893 | const char *part, | |
894 | void *v) { | |
895 | return simple(c, string_response_opcallback, (void (*)())completed, v, | |
896 | "part", track, context, part, (char *)0); | |
897 | } | |
898 | ||
899 | int disorder_eclient_play(disorder_eclient *c, | |
900 | const char *track, | |
901 | disorder_eclient_no_response *completed, | |
902 | void *v) { | |
903 | return simple(c, no_response_opcallback, (void (*)())completed, v, | |
904 | "play", track, (char *)0); | |
905 | } | |
906 | ||
907 | int disorder_eclient_pause(disorder_eclient *c, | |
908 | disorder_eclient_no_response *completed, | |
909 | void *v) { | |
910 | return simple(c, no_response_opcallback, (void (*)())completed, v, | |
911 | "pause", (char *)0); | |
912 | } | |
913 | ||
914 | int disorder_eclient_resume(disorder_eclient *c, | |
915 | disorder_eclient_no_response *completed, | |
916 | void *v) { | |
917 | return simple(c, no_response_opcallback, (void (*)())completed, v, | |
918 | "resume", (char *)0); | |
919 | } | |
920 | ||
921 | int disorder_eclient_scratch(disorder_eclient *c, | |
922 | const char *id, | |
923 | disorder_eclient_no_response *completed, | |
924 | void *v) { | |
925 | return simple(c, no_response_opcallback, (void (*)())completed, v, | |
926 | "scratch", id, (char *)0); | |
927 | } | |
928 | ||
929 | int disorder_eclient_scratch_playing(disorder_eclient *c, | |
930 | disorder_eclient_no_response *completed, | |
931 | void *v) { | |
932 | return disorder_eclient_scratch(c, 0, completed, v); | |
933 | } | |
934 | ||
935 | int disorder_eclient_remove(disorder_eclient *c, | |
936 | const char *id, | |
937 | disorder_eclient_no_response *completed, | |
938 | void *v) { | |
939 | return simple(c, no_response_opcallback, (void (*)())completed, v, | |
940 | "remove", id, (char *)0); | |
941 | } | |
942 | ||
943 | int disorder_eclient_moveafter(disorder_eclient *c, | |
944 | const char *target, | |
945 | int nids, | |
946 | const char **ids, | |
947 | disorder_eclient_no_response *completed, | |
948 | void *v) { | |
949 | struct vector vec; | |
950 | int n; | |
951 | ||
952 | vector_init(&vec); | |
953 | vector_append(&vec, (char *)"moveafter"); | |
954 | vector_append(&vec, (char *)target); | |
955 | for(n = 0; n < nids; ++n) | |
956 | vector_append(&vec, (char *)ids[n]); | |
957 | stash_command_vector(c, 0/*queuejump*/, no_response_opcallback, completed, v, | |
958 | vec.nvec, vec.vec); | |
959 | disorder_eclient_polled(c, 0); | |
960 | return 0; | |
961 | } | |
962 | ||
963 | int disorder_eclient_recent(disorder_eclient *c, | |
964 | disorder_eclient_queue_response *completed, | |
965 | void *v) { | |
966 | return simple(c, queue_response_opcallback, (void (*)())completed, v, | |
967 | "recent", (char *)0); | |
968 | } | |
969 | ||
970 | int disorder_eclient_queue(disorder_eclient *c, | |
971 | disorder_eclient_queue_response *completed, | |
972 | void *v) { | |
973 | return simple(c, queue_response_opcallback, (void (*)())completed, v, | |
974 | "queue", (char *)0); | |
975 | } | |
976 | ||
977 | int disorder_eclient_files(disorder_eclient *c, | |
978 | disorder_eclient_list_response *completed, | |
979 | const char *dir, | |
980 | const char *re, | |
981 | void *v) { | |
982 | return simple(c, list_response_opcallback, (void (*)())completed, v, | |
983 | "files", dir, re, (char *)0); | |
984 | } | |
985 | ||
986 | int disorder_eclient_dirs(disorder_eclient *c, | |
987 | disorder_eclient_list_response *completed, | |
988 | const char *dir, | |
989 | const char *re, | |
990 | void *v) { | |
991 | return simple(c, list_response_opcallback, (void (*)())completed, v, | |
992 | "dirs", dir, re, (char *)0); | |
993 | } | |
994 | ||
995 | int disorder_eclient_playing(disorder_eclient *c, | |
996 | disorder_eclient_queue_response *completed, | |
997 | void *v) { | |
998 | return simple(c, playing_response_opcallback, (void (*)())completed, v, | |
999 | "playing", (char *)0); | |
1000 | } | |
1001 | ||
1002 | int disorder_eclient_length(disorder_eclient *c, | |
1003 | disorder_eclient_integer_response *completed, | |
1004 | const char *track, | |
1005 | void *v) { | |
1006 | return simple(c, integer_response_opcallback, (void (*)())completed, v, | |
1007 | "length", track, (char *)0); | |
1008 | } | |
1009 | ||
1010 | int disorder_eclient_volume(disorder_eclient *c, | |
1011 | disorder_eclient_volume_response *completed, | |
1012 | int l, int r, | |
1013 | void *v) { | |
1014 | char sl[64], sr[64]; | |
1015 | ||
1016 | if(l < 0 && r < 0) { | |
1017 | return simple(c, volume_response_opcallback, (void (*)())completed, v, | |
1018 | "volume", (char *)0); | |
1019 | } else if(l >= 0 && r >= 0) { | |
1020 | assert(l <= 100); | |
1021 | assert(r <= 100); | |
1022 | byte_snprintf(sl, sizeof sl, "%d", l); | |
1023 | byte_snprintf(sr, sizeof sr, "%d", r); | |
1024 | return simple(c, volume_response_opcallback, (void (*)())completed, v, | |
1025 | "volume", sl, sr, (char *)0); | |
1026 | } else { | |
1027 | assert(!"invalid arguments to disorder_eclient_volume"); | |
1028 | return -1; /* gcc is being dim */ | |
1029 | } | |
1030 | } | |
1031 | ||
1032 | int disorder_eclient_enable(disorder_eclient *c, | |
1033 | disorder_eclient_no_response *completed, | |
1034 | void *v) { | |
1035 | return simple(c, no_response_opcallback, (void (*)())completed, v, | |
1036 | "enable", (char *)0); | |
1037 | } | |
1038 | ||
1039 | int disorder_eclient_disable(disorder_eclient *c, | |
1040 | disorder_eclient_no_response *completed, | |
1041 | void *v){ | |
1042 | return simple(c, no_response_opcallback, (void (*)())completed, v, | |
1043 | "disable", (char *)0); | |
1044 | } | |
1045 | ||
1046 | int disorder_eclient_random_enable(disorder_eclient *c, | |
1047 | disorder_eclient_no_response *completed, | |
1048 | void *v){ | |
1049 | return simple(c, no_response_opcallback, (void (*)())completed, v, | |
1050 | "random-enable", (char *)0); | |
1051 | } | |
1052 | ||
1053 | int disorder_eclient_random_disable(disorder_eclient *c, | |
1054 | disorder_eclient_no_response *completed, | |
1055 | void *v){ | |
1056 | return simple(c, no_response_opcallback, (void (*)())completed, v, | |
1057 | "random-disable", (char *)0); | |
1058 | } | |
1059 | ||
1060 | int disorder_eclient_get(disorder_eclient *c, | |
1061 | disorder_eclient_string_response *completed, | |
1062 | const char *track, const char *pref, | |
1063 | void *v) { | |
1064 | return simple(c, string_response_opcallback, (void (*)())completed, v, | |
1065 | "get", track, pref, (char *)0); | |
1066 | } | |
1067 | ||
1068 | int disorder_eclient_set(disorder_eclient *c, | |
1069 | disorder_eclient_no_response *completed, | |
1070 | const char *track, const char *pref, | |
1071 | const char *value, | |
1072 | void *v) { | |
1073 | return simple(c, no_response_opcallback, (void (*)())completed, v, | |
1074 | "set", track, pref, value, (char *)0); | |
1075 | } | |
1076 | ||
1077 | int disorder_eclient_unset(disorder_eclient *c, | |
1078 | disorder_eclient_no_response *completed, | |
1079 | const char *track, const char *pref, | |
1080 | void *v) { | |
1081 | return simple(c, no_response_opcallback, (void (*)())completed, v, | |
1082 | "unset", track, pref, (char *)0); | |
1083 | } | |
1084 | ||
1085 | int disorder_eclient_resolve(disorder_eclient *c, | |
1086 | disorder_eclient_string_response *completed, | |
1087 | const char *track, | |
1088 | void *v) { | |
1089 | return simple(c, string_response_opcallback, (void (*)())completed, v, | |
1090 | "resolve", track, (char *)0); | |
1091 | } | |
1092 | ||
1093 | int disorder_eclient_search(disorder_eclient *c, | |
1094 | disorder_eclient_list_response *completed, | |
1095 | const char *terms, | |
1096 | void *v) { | |
1097 | if(!split(terms, 0, SPLIT_QUOTES, 0, 0)) return -1; | |
1098 | return simple(c, list_response_opcallback, (void (*)())completed, v, | |
1099 | "search", terms, (char *)0); | |
1100 | } | |
1101 | ||
1102 | /* Log clients ***************************************************************/ | |
1103 | ||
1104 | int disorder_eclient_log(disorder_eclient *c, | |
1105 | const disorder_eclient_log_callbacks *callbacks, | |
1106 | void *v) { | |
1107 | if(c->log_callbacks) return -1; | |
1108 | c->log_callbacks = callbacks; | |
1109 | c->log_v = v; | |
1110 | stash_command(c, 0/*queuejump*/, log_opcallback, 0/*completed*/, v, | |
1111 | "log", (char *)0); | |
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | /* If we get here we've stopped being a log client */ | |
1116 | static void log_opcallback(disorder_eclient *c, | |
1117 | struct operation attribute((unused)) *op) { | |
1118 | D(("log_opcallback")); | |
1119 | c->log_callbacks = 0; | |
1120 | c->log_v = 0; | |
1121 | } | |
1122 | ||
1123 | /* error callback for log line parsing */ | |
1124 | static void logline_error(const char *msg, void *u) { | |
1125 | disorder_eclient *c = u; | |
1126 | protocol_error(c, c->ops, -1, "error parsing log line: %s", msg); | |
1127 | } | |
1128 | ||
1129 | /* process a single log line */ | |
1130 | static void logline(disorder_eclient *c, const char *line) { | |
1131 | int nvec, n; | |
1132 | char **vec; | |
1133 | uintmax_t when; | |
1134 | ||
1135 | D(("log_opcallback [%s]", line)); | |
1136 | vec = split(line, &nvec, SPLIT_QUOTES, logline_error, c); | |
1137 | if(nvec < 2) return; /* probably an error, already | |
1138 | * reported */ | |
1139 | if(sscanf(vec[0], "%"SCNxMAX, &when) != 1) { | |
1140 | /* probably the wrong side of a format change */ | |
1141 | protocol_error(c, c->ops, -1, "invalid log timestamp '%s'", vec[0]); | |
1142 | return; | |
1143 | } | |
1144 | /* TODO: do something with the time */ | |
1145 | n = TABLE_FIND(logentry_handlers, struct logentry_handler, name, vec[1]); | |
1146 | if(n < 0) return; /* probably a future command */ | |
1147 | vec += 2; | |
1148 | nvec -= 2; | |
1149 | if(nvec < logentry_handlers[n].min || nvec > logentry_handlers[n].max) | |
1150 | return; | |
1151 | logentry_handlers[n].handler(c, nvec, vec); | |
1152 | } | |
1153 | ||
1154 | static void logentry_completed(disorder_eclient *c, | |
1155 | int attribute((unused)) nvec, char **vec) { | |
1156 | if(!c->log_callbacks->completed) return; | |
1157 | c->log_callbacks->completed(c->log_v, vec[0]); | |
1158 | } | |
1159 | ||
1160 | static void logentry_failed(disorder_eclient *c, | |
1161 | int attribute((unused)) nvec, char **vec) { | |
1162 | if(!c->log_callbacks->failed)return; | |
1163 | c->log_callbacks->failed(c->log_v, vec[0], vec[1]); | |
1164 | } | |
1165 | ||
1166 | static void logentry_moved(disorder_eclient *c, | |
1167 | int attribute((unused)) nvec, char **vec) { | |
1168 | if(!c->log_callbacks->moved) return; | |
1169 | c->log_callbacks->moved(c->log_v, vec[0]); | |
1170 | } | |
1171 | ||
1172 | static void logentry_playing(disorder_eclient *c, | |
1173 | int attribute((unused)) nvec, char **vec) { | |
1174 | if(!c->log_callbacks->playing) return; | |
1175 | c->log_callbacks->playing(c->log_v, vec[0], vec[1]); | |
1176 | } | |
1177 | ||
1178 | static void logentry_queue(disorder_eclient *c, | |
1179 | int attribute((unused)) nvec, char **vec) { | |
1180 | struct queue_entry *q; | |
1181 | ||
1182 | if(!c->log_callbacks->completed) return; | |
1183 | q = xmalloc(sizeof *q); | |
1184 | if(queue_unmarshall_vec(q, nvec, vec, eclient_queue_error, c)) | |
1185 | return; /* bogus */ | |
1186 | c->log_callbacks->queue(c->log_v, q); | |
1187 | } | |
1188 | ||
1189 | static void logentry_recent_added(disorder_eclient *c, | |
1190 | int attribute((unused)) nvec, char **vec) { | |
1191 | struct queue_entry *q; | |
1192 | ||
1193 | if(!c->log_callbacks->recent_added) return; | |
1194 | q = xmalloc(sizeof *q); | |
1195 | if(queue_unmarshall_vec(q, nvec, vec, eclient_queue_error, c)) | |
1196 | return; /* bogus */ | |
1197 | c->log_callbacks->recent_added(c->log_v, q); | |
1198 | } | |
1199 | ||
1200 | static void logentry_recent_removed(disorder_eclient *c, | |
1201 | int attribute((unused)) nvec, char **vec) { | |
1202 | if(!c->log_callbacks->recent_removed) return; | |
1203 | c->log_callbacks->recent_removed(c->log_v, vec[0]); | |
1204 | } | |
1205 | ||
1206 | static void logentry_removed(disorder_eclient *c, | |
1207 | int attribute((unused)) nvec, char **vec) { | |
1208 | if(!c->log_callbacks->removed) return; | |
1209 | c->log_callbacks->removed(c->log_v, vec[0], vec[1]); | |
1210 | } | |
1211 | ||
1212 | static void logentry_scratched(disorder_eclient *c, | |
1213 | int attribute((unused)) nvec, char **vec) { | |
1214 | if(!c->log_callbacks->scratched) return; | |
1215 | c->log_callbacks->scratched(c->log_v, vec[0], vec[1]); | |
1216 | } | |
1217 | ||
1218 | static const struct { | |
1219 | unsigned long bit; | |
1220 | const char *enable; | |
1221 | const char *disable; | |
1222 | } statestrings[] = { | |
1223 | { DISORDER_PLAYING_ENABLED, "enable_play", "disable_play" }, | |
1224 | { DISORDER_RANDOM_ENABLED, "enable_random", "disable_random" }, | |
1225 | { DISORDER_TRACK_PAUSED, "pause", "resume" }, | |
1226 | }; | |
1227 | #define NSTATES (int)(sizeof states / sizeof *states) | |
1228 | ||
1229 | static void logentry_state(disorder_eclient *c, | |
1230 | int attribute((unused)) nvec, char **vec) { | |
1231 | int n; | |
1232 | ||
1233 | for(n = 0; n < NSTATES; ++n) | |
1234 | if(!strcmp(vec[0], statestrings[n].enable)) { | |
1235 | c->statebits |= statestrings[n].bit; | |
1236 | break; | |
1237 | } else if(!strcmp(vec[0], statestrings[n].disable)) { | |
1238 | c->statebits &= ~statestrings[n].bit; | |
1239 | break; | |
1240 | } | |
1241 | if(!c->log_callbacks->state) return; | |
1242 | c->log_callbacks->state(c->log_v, c->statebits); | |
1243 | } | |
1244 | ||
1245 | static void logentry_volume(disorder_eclient *c, | |
1246 | int attribute((unused)) nvec, char **vec) { | |
1247 | long l, r; | |
1248 | ||
1249 | if(!c->log_callbacks->volume) return; | |
1250 | if(xstrtol(&l, vec[0], 0, 10) | |
1251 | || xstrtol(&r, vec[1], 0, 10) | |
1252 | || l < 0 || l > INT_MAX | |
1253 | || r < 0 || r > INT_MAX) | |
1254 | return; /* bogus */ | |
1255 | c->log_callbacks->volume(c->log_v, (int)l, (int)r); | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | Local Variables: | |
1260 | c-basic-offset:2 | |
1261 | comment-column:40 | |
1262 | fill-column:79 | |
1263 | indent-tabs-mode:nil | |
1264 | End: | |
1265 | */ |