2 * This file is part of DisOrder.
3 * Copyright (C) 2006, 2007 Richard Kettlewell
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.
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.
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
20 /** @file lib/eclient.c
21 * @brief Client code for event-driven programs
27 #include <sys/types.h>
28 #include <sys/socket.h>
29 #include <netinet/in.h>
44 #include "configuration.h"
51 #include "inputline.h"
58 #include "client-common.h"
60 /* TODO: more commands */
62 /** @brief How often to send data to the server when receiving logs */
63 #define LOG_PROD_INTERVAL 10
65 /* Types *********************************************************************/
67 /** @brief Client state */
69 state_disconnected
, /**< @brief not connected */
70 state_connecting
, /**< @brief waiting for connect() */
71 state_connected
, /**< @brief connected but not authenticated */
72 state_idle
, /**< @brief not doing anything */
73 state_cmdresponse
, /**< @brief waiting for command resonse */
74 state_body
, /**< @brief accumulating body */
75 state_log
, /**< @brief monitoring log */
78 /** @brief Names for @ref client_state */
79 static const char *const states
[] = {
89 struct operation
; /* forward decl */
91 /** @brief Type of an operation callback */
92 typedef void operation_callback(disorder_eclient
*c
, struct operation
*op
);
94 /** @brief A pending operation.
96 * This can be either a command or part of the authentication protocol. In the
97 * former case new commands are appended to the list, in the latter case they
98 * are inserted at the front. */
100 struct operation
*next
; /**< @brief next operation */
101 char *cmd
; /**< @brief command to send or 0 */
102 operation_callback
*opcallback
; /**< @brief internal completion callback */
103 void (*completed
)(); /**< @brief user completion callback or 0 */
104 void *v
; /**< @brief data for COMPLETED */
105 disorder_eclient
*client
; /**< @brief owning client */
107 /** @brief true if sent to server
109 * This is cleared by disorder_eclient_close(), forcing all queued
110 * commands to be transparently resent.
115 /** @brief Client structure */
116 struct disorder_eclient
{
118 int fd
; /**< @brief connection to server */
119 enum client_state state
; /**< @brief current state */
120 int authenticated
; /**< @brief true when authenicated */
121 struct dynstr output
; /**< @brief output buffer */
122 struct dynstr input
; /**< @brief input buffer */
123 int eof
; /**< @brief input buffer is at EOF */
124 const disorder_eclient_callbacks
*callbacks
; /**< @brief error callbacks */
125 void *u
; /**< @brief user data */
126 struct operation
*ops
; /**< @brief queue of operations */
127 struct operation
**opstail
; /**< @brief queue tail */
128 /* accumulated response */
129 int rc
; /**< @brief response code */
130 char *line
; /**< @brief complete line */
131 struct vector vec
; /**< @brief body */
133 const disorder_eclient_log_callbacks
*log_callbacks
;
134 /**< @brief log callbacks
136 * Once disorder_eclient_log() has been issued this is always set. When we
137 * re-connect it is checked to re-issue the log command.
139 void *log_v
; /**< @brief user data */
140 unsigned long statebits
; /**< @brief latest state */
143 /**< @brief last time we sent a prod
145 * When we are receiving log data we send a "prod" byte to the server from
146 * time to time so that we detect broken connections reasonably quickly. The
147 * server just ignores these bytes.
151 /* Forward declarations ******************************************************/
153 static int start_connect(disorder_eclient
*c
);
154 static void process_line(disorder_eclient
*c
, char *line
);
155 static void maybe_connected(disorder_eclient
*c
);
156 static void authbanner_opcallback(disorder_eclient
*c
,
157 struct operation
*op
);
158 static void authuser_opcallback(disorder_eclient
*c
,
159 struct operation
*op
);
160 static void complete(disorder_eclient
*c
);
161 static void send_output(disorder_eclient
*c
);
162 static void put(disorder_eclient
*c
, const char *s
, size_t n
);
163 static void read_input(disorder_eclient
*c
);
164 static void stash_command(disorder_eclient
*c
,
166 operation_callback
*opcallback
,
171 static void log_opcallback(disorder_eclient
*c
, struct operation
*op
);
172 static void logline(disorder_eclient
*c
, const char *line
);
173 static void logentry_completed(disorder_eclient
*c
, int nvec
, char **vec
);
174 static void logentry_failed(disorder_eclient
*c
, int nvec
, char **vec
);
175 static void logentry_moved(disorder_eclient
*c
, int nvec
, char **vec
);
176 static void logentry_playing(disorder_eclient
*c
, int nvec
, char **vec
);
177 static void logentry_queue(disorder_eclient
*c
, int nvec
, char **vec
);
178 static void logentry_recent_added(disorder_eclient
*c
, int nvec
, char **vec
);
179 static void logentry_recent_removed(disorder_eclient
*c
, int nvec
, char **vec
);
180 static void logentry_removed(disorder_eclient
*c
, int nvec
, char **vec
);
181 static void logentry_scratched(disorder_eclient
*c
, int nvec
, char **vec
);
182 static void logentry_state(disorder_eclient
*c
, int nvec
, char **vec
);
183 static void logentry_volume(disorder_eclient
*c
, int nvec
, char **vec
);
184 static void logentry_rescanned(disorder_eclient
*c
, int nvec
, char **vec
);
186 /* Tables ********************************************************************/
188 /** @brief One possible log entry */
189 struct logentry_handler
{
190 const char *name
; /**< @brief Entry name */
191 int min
; /**< @brief Minimum arguments */
192 int max
; /**< @brief Maximum arguments */
193 void (*handler
)(disorder_eclient
*c
,
195 char **vec
); /**< @brief Handler function */
198 /** @brief Table for parsing log entries */
199 static const struct logentry_handler logentry_handlers
[] = {
200 #define LE(X, MIN, MAX) { #X, MIN, MAX, logentry_##X }
205 LE(queue
, 2, INT_MAX
),
206 LE(recent_added
, 2, INT_MAX
),
207 LE(recent_removed
, 1, 1),
215 /* Setup and teardown ********************************************************/
217 /** @brief Create a new client
219 * Does NOT connect the client - connections are made (and re-made) on demand.
221 disorder_eclient
*disorder_eclient_new(const disorder_eclient_callbacks
*cb
,
223 disorder_eclient
*c
= xmalloc(sizeof *c
);
224 D(("disorder_eclient_new"));
228 c
->opstail
= &c
->ops
;
229 vector_init(&c
->vec
);
230 dynstr_init(&c
->input
);
231 dynstr_init(&c
->output
);
235 /** @brief Disconnect a client
236 * @param c Client to disconnect
238 * NB that this routine just disconnnects the TCP connection. It does not
239 * destroy the client! If you continue to use it then it will attempt to
242 void disorder_eclient_close(disorder_eclient
*c
) {
243 struct operation
*op
;
245 D(("disorder_eclient_close"));
247 D(("disorder_eclient_close closing fd %d", c
->fd
));
248 c
->callbacks
->poll(c
->u
, c
, c
->fd
, 0);
251 c
->state
= state_disconnected
;
257 c
->authenticated
= 0;
258 /* We'll need to resend all operations */
259 for(op
= c
->ops
; op
; op
= op
->next
)
261 /* Drop our use a hint that we're disconnected */
262 if(c
->log_callbacks
&& c
->log_callbacks
->state
)
263 c
->log_callbacks
->state(c
->log_v
, c
->statebits
);
266 /** @brief Return current state */
267 unsigned long disorder_eclient_state(const disorder_eclient
*c
) {
268 return c
->statebits
| (c
->state
> state_connected ? DISORDER_CONNECTED
: 0);
271 /* Error reporting ***********************************************************/
273 /** @brief called when a connection error occurs
275 * After this called we will be disconnected (by disorder_eclient_close()),
276 * so there will be a reconnection before any commands can be sent.
278 static int comms_error(disorder_eclient
*c
, const char *fmt
, ...) {
284 byte_xvasprintf(&s
, fmt
, ap
);
286 disorder_eclient_close(c
);
287 c
->callbacks
->comms_error(c
->u
, s
);
291 /** @brief called when the server reports an error */
292 static int protocol_error(disorder_eclient
*c
, struct operation
*op
,
293 int code
, const char *fmt
, ...) {
297 D(("protocol_error"));
299 byte_xvasprintf(&s
, fmt
, ap
);
301 c
->callbacks
->protocol_error(c
->u
, op
->v
, code
, s
);
305 /* State machine *************************************************************/
307 /** @brief Called when there's something to do
309 * @param mode bitmap of @ref DISORDER_POLL_READ and/or @ref DISORDER_POLL_WRITE.
311 * This should be called from by your code when the file descriptor is readable
312 * or writable (as requested by the @c poll callback, see @ref
313 * disorder_eclient_callbacks) and in any case from time to time (with @p mode
314 * = 0) to allow for retries to work.
316 void disorder_eclient_polled(disorder_eclient
*c
, unsigned mode
) {
317 struct operation
*op
;
320 D(("disorder_eclient_polled fd=%d state=%s mode=[%s %s]",
321 c
->fd
, states
[c
->state
],
322 mode
& DISORDER_POLL_READ ?
"READ" : "",
323 mode
& DISORDER_POLL_WRITE ?
"WRITE" : ""));
324 /* The pattern here is to check each possible state in turn and try to
325 * advance (though on error we might go back). If we advance we leave open
326 * the possibility of falling through to the next state, but we set the mode
327 * bits to 0, to avoid false positives (which matter more in some cases than
330 if(c
->state
== state_disconnected
) {
331 D(("state_disconnected"));
332 /* If there is no password yet then we cannot connect */
333 if(!config
->password
) {
334 comms_error(c
, "no password is configured");
338 /* might now be state_disconnected (on error), state_connecting (slow
339 * connect) or state_connected (fast connect). If state_disconnected then
340 * we just rely on a periodic callback from the event loop sometime. */
344 if(c
->state
== state_connecting
&& mode
) {
345 D(("state_connecting"));
347 /* Might be state_disconnected (on error) or state_connected (on success).
348 * In the former case we rely on the event loop for a periodic callback to
353 if(c
->state
== state_connected
) {
354 D(("state_connected"));
355 /* We just connected. Initiate the authentication protocol. */
356 stash_command(c
, 1/*queuejump*/, authbanner_opcallback
,
357 0/*completed*/, 0/*v*/, 0/*cmd*/);
358 /* We never stay is state_connected very long. We could in principle jump
359 * straight to state_cmdresponse since there's actually no command to
360 * send, but that would arguably be cheating. */
361 c
->state
= state_idle
;
364 if(c
->state
== state_idle
) {
366 /* We are connected, and have finished any command we set off, look for
370 if(c
->authenticated
) {
371 /* Transmit all unsent operations */
372 for(op
= c
->ops
; op
; op
= op
->next
) {
374 put(c
, op
->cmd
, strlen(op
->cmd
));
379 /* Just send the head operation */
380 if(c
->ops
->cmd
&& !c
->ops
->sent
) {
381 put(c
, c
->ops
->cmd
, strlen(c
->ops
->cmd
));
385 /* Awaiting response for the operation at the head of the list */
386 c
->state
= state_cmdresponse
;
389 c
->callbacks
->report(c
->u
, 0);
392 /* Queue up a byte to send */
393 if(c
->state
== state_log
394 && c
->output
.nvec
== 0
395 && time(&now
) - c
->last_prod
> LOG_PROD_INTERVAL
) {
400 if(c
->state
== state_cmdresponse
401 || c
->state
== state_body
402 || c
->state
== state_log
) {
403 D(("state_%s", states
[c
->state
]));
404 /* We are awaiting a response */
405 if(mode
& DISORDER_POLL_WRITE
) send_output(c
);
406 if(mode
& DISORDER_POLL_READ
) read_input(c
);
407 /* There are a couple of reasons we might want to re-enter the state
408 * machine from the top. state_idle is obvious: there may be further
409 * commands to process. Re-entering on state_disconnected means that we
410 * immediately retry connection if a comms error occurs during a command.
411 * This is different to the case where a connection fails, where we await a
412 * spontaneous call to initiate the retry. */
414 case state_disconnected
: /* lost connection */
415 case state_idle
: /* completed a command */
417 disorder_eclient_polled(c
, 0);
424 /* Figure out what to set the mode to */
426 case state_disconnected
:
427 D(("state_disconnected (2)"));
428 /* Probably an error occurred. Await a retry. */
431 case state_connecting
:
432 D(("state_connecting (2)"));
433 /* Waiting for connect to complete */
434 mode
= DISORDER_POLL_READ
|DISORDER_POLL_WRITE
;
436 case state_connected
:
437 D(("state_connected (2)"));
438 assert(!"should never be in state_connected here");
441 D(("state_idle (2)"));
442 /* Connected but nothing to do. */
445 case state_cmdresponse
:
448 D(("state_%s (2)", states
[c
->state
]));
449 /* Gathering a response. Wait for input. */
450 mode
= DISORDER_POLL_READ
;
451 /* Flush any pending output. */
452 if(c
->output
.nvec
) mode
|= DISORDER_POLL_WRITE
;
455 D(("fd=%d new mode [%s %s]",
457 mode
& DISORDER_POLL_READ ?
"READ" : "",
458 mode
& DISORDER_POLL_WRITE ?
"WRITE" : ""));
459 if(c
->fd
!= -1) c
->callbacks
->poll(c
->u
, c
, c
->fd
, mode
);
462 /** @brief Called to start connecting */
463 static int start_connect(disorder_eclient
*c
) {
467 D(("start_connect"));
468 if((len
= find_server(&sa
, &c
->ident
)) == (socklen_t
)-1)
469 return comms_error(c
, "cannot look up server"); /* TODO better error */
474 if((c
->fd
= socket(sa
->sa_family
, SOCK_STREAM
, 0)) < 0)
475 return comms_error(c
, "socket: %s", strerror(errno
));
479 if(connect(c
->fd
, sa
, len
) < 0) {
483 c
->state
= state_connecting
;
484 /* We are called from _polled so the state machine will get to do its
488 /* Signal the error to the caller. */
489 return comms_error(c
, "connecting to %s: %s", c
->ident
, strerror(errno
));
492 c
->state
= state_connected
;
496 /** @brief Called when poll triggers while waiting for a connection */
497 static void maybe_connected(disorder_eclient
*c
) {
498 /* We either connected, or got an error. */
500 socklen_t len
= sizeof err
;
502 D(("maybe_connected"));
503 /* Work around over-enthusiastic error slippage */
504 if(getsockopt(c
->fd
, SOL_SOCKET
, SO_ERROR
, &err
, &len
) < 0)
507 /* The connection failed */
508 comms_error(c
, "connecting to %s: %s", c
->ident
, strerror(err
));
509 /* sets state_disconnected */
513 /* The connection succeeded */
514 c
->state
= state_connected
;
515 byte_xasprintf(&r
, "connected to %s", c
->ident
);
516 c
->callbacks
->report(c
->u
, r
);
517 /* If this is a log client we expect to get a bunch of updates from the
518 * server straight away */
522 /* Authentication ************************************************************/
524 static void authbanner_opcallback(disorder_eclient
*c
,
525 struct operation
*op
) {
527 const unsigned char *nonce
;
531 const char *protocol
, *algorithm
, *challenge
;
533 D(("authbanner_opcallback"));
535 || !(rvec
= split(c
->line
+ 4, &nrvec
, SPLIT_QUOTES
, 0, 0))
537 /* Banner told us to go away, or was malformed. We cannot proceed. */
538 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
539 disorder_eclient_close(c
);
543 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
544 disorder_eclient_close(c
);
549 if(strcmp(protocol
, "2")) {
550 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
551 disorder_eclient_close(c
);
553 nonce
= unhex(challenge
, &nonce_len
);
554 res
= authhash(nonce
, nonce_len
, config
->password
, algorithm
);
556 protocol_error(c
, op
, c
->rc
, "%s: unknown authentication algorithm '%s'",
557 c
->ident
, algorithm
);
558 disorder_eclient_close(c
);
561 stash_command(c
, 1/*queuejump*/, authuser_opcallback
, 0/*completed*/, 0/*v*/,
562 "user", quoteutf8(config
->username
), quoteutf8(res
),
566 static void authuser_opcallback(disorder_eclient
*c
,
567 struct operation
*op
) {
570 D(("authuser_opcallback"));
571 if(c
->rc
/ 100 != 2) {
572 /* Wrong password or something. We cannot proceed. */
573 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
574 disorder_eclient_close(c
);
577 /* OK, we're authenticated now. */
578 c
->authenticated
= 1;
579 byte_xasprintf(&r
, "authenticated with %s", c
->ident
);
580 c
->callbacks
->report(c
->u
, r
);
581 if(c
->log_callbacks
&& !(c
->ops
&& c
->ops
->opcallback
== log_opcallback
))
582 /* We are a log client, switch to logging mode */
583 stash_command(c
, 0/*queuejump*/, log_opcallback
, 0/*completed*/, c
->log_v
,
587 /* Output ********************************************************************/
589 /* Chop N bytes off the front of a dynstr */
590 static void consume(struct dynstr
*d
, int n
) {
591 D(("consume %d", n
));
592 assert(d
->nvec
>= n
);
593 memmove(d
->vec
, d
->vec
+ n
, d
->nvec
- n
);
597 /* Write some bytes */
598 static void put(disorder_eclient
*c
, const char *s
, size_t n
) {
599 D(("put %d %.*s", c
->fd
, (int)n
, s
));
600 dynstr_append_bytes(&c
->output
, s
, n
);
603 /* Called when we can write to our FD, or at any other time */
604 static void send_output(disorder_eclient
*c
) {
607 D(("send_output %d bytes pending", c
->output
.nvec
));
608 if(c
->state
> state_connecting
&& c
->output
.nvec
) {
609 n
= write(c
->fd
, c
->output
.vec
, c
->output
.nvec
);
616 comms_error(c
, "writing to %s: %s", c
->ident
, strerror(errno
));
620 consume(&c
->output
, n
);
624 /* Input *********************************************************************/
626 /* Called when c->fd might be readable, or at any other time */
627 static void read_input(disorder_eclient
*c
) {
632 D(("read_input in state %s", states
[c
->state
]));
633 if(c
->state
<= state_connected
) return; /* ignore bogus calls */
634 /* read some more input */
635 n
= read(c
->fd
, buffer
, sizeof buffer
);
642 comms_error(c
, "reading from %s: %s", c
->ident
, strerror(errno
));
645 return; /* no new input to process */
647 D(("read %d bytes: [%.*s]", n
, n
, buffer
));
648 dynstr_append_bytes(&c
->input
, buffer
, n
);
651 /* might have more than one line to process */
652 while(c
->state
> state_connecting
653 && (nl
= memchr(c
->input
.vec
, '\n', c
->input
.nvec
))) {
654 process_line(c
, xstrndup(c
->input
.vec
, nl
- c
->input
.vec
));
655 /* we might have disconnected along the way, which zogs the input buffer */
656 if(c
->state
> state_connecting
)
657 consume(&c
->input
, (nl
- c
->input
.vec
) + 1);
660 comms_error(c
, "reading from %s: server disconnected", c
->ident
);
661 c
->authenticated
= 0;
665 /* called with a line that has just been read */
666 static void process_line(disorder_eclient
*c
, char *line
) {
667 D(("process_line %d [%s]", c
->fd
, line
));
669 case state_cmdresponse
:
670 /* This is the first line of a response */
671 if(!(line
[0] >= '0' && line
[0] <= '9'
672 && line
[1] >= '0' && line
[1] <= '9'
673 && line
[2] >= '0' && line
[2] <= '9'
675 fatal(0, "invalid response from server: %s", line
);
676 c
->rc
= (line
[0] * 10 + line
[1]) * 10 + line
[2] - 111 * '0';
680 /* We need to collect the body. */
681 c
->state
= state_body
;
682 vector_init(&c
->vec
);
685 assert(c
->log_callbacks
!= 0);
686 if(c
->log_callbacks
->connected
)
687 c
->log_callbacks
->connected(c
->log_v
);
688 c
->state
= state_log
;
691 /* We've got the whole response. Go into the idle state so the state
692 * machine knows we're done and then call the operation callback. */
698 if(strcmp(line
, ".")) {
699 /* A line from the body */
700 vector_append(&c
->vec
, line
+ (line
[0] == '.'));
702 /* End of the body. */
703 vector_terminate(&c
->vec
);
708 if(strcmp(line
, ".")) {
709 logline(c
, line
+ (line
[0] == '.'));
714 assert(!"wrong state for location");
719 /* Called when an operation completes */
720 static void complete(disorder_eclient
*c
) {
721 struct operation
*op
;
724 /* Pop the operation off the queue */
727 if(c
->opstail
== &op
->next
)
728 c
->opstail
= &c
->ops
;
729 /* If we've pipelined a command ahead then we go straight to cmdresponser.
730 * Otherwise we go to idle, which will arrange further sends. */
731 c
->state
= c
->ops
&& c
->ops
->sent ? state_cmdresponse
: state_idle
;
732 op
->opcallback(c
, op
);
733 /* Note that we always call the opcallback even on error, though command
734 * opcallbacks generally always do the same error handling, i.e. just call
735 * protocol_error(). It's the auth* opcallbacks that have different
739 /* Operation setup ***********************************************************/
741 static void stash_command_vector(disorder_eclient
*c
,
743 operation_callback
*opcallback
,
748 struct operation
*op
= xmalloc(sizeof *op
);
754 for(n
= 0; n
< ncmd
; ++n
) {
756 dynstr_append(&d
, ' ');
757 dynstr_append_string(&d
, quoteutf8(cmd
[n
]));
759 dynstr_append(&d
, '\n');
760 dynstr_terminate(&d
);
763 op
->cmd
= 0; /* usually, awaiting challenge */
764 op
->opcallback
= opcallback
;
765 op
->completed
= completed
;
769 assert(op
->sent
== 0);
771 /* Authentication operations jump the queue of useful commands */
774 if(c
->opstail
== &c
->ops
)
775 c
->opstail
= &op
->next
;
776 for(op
= c
->ops
; op
; op
= op
->next
)
780 c
->opstail
= &op
->next
;
784 static void vstash_command(disorder_eclient
*c
,
786 operation_callback
*opcallback
,
789 const char *cmd
, va_list ap
) {
793 D(("vstash_command %s", cmd ? cmd
: "NULL"));
796 vector_append(&vec
, (char *)cmd
);
797 while((arg
= va_arg(ap
, char *)))
798 vector_append(&vec
, arg
);
799 stash_command_vector(c
, queuejump
, opcallback
, completed
, v
,
802 stash_command_vector(c
, queuejump
, opcallback
, completed
, v
, 0, 0);
805 static void stash_command(disorder_eclient
*c
,
807 operation_callback
*opcallback
,
815 vstash_command(c
, queuejump
, opcallback
, completed
, v
, cmd
, ap
);
819 /* Command support ***********************************************************/
821 /* for commands with a quoted string response */
822 static void string_response_opcallback(disorder_eclient
*c
,
823 struct operation
*op
) {
824 D(("string_response_callback"));
825 if(c
->rc
/ 100 == 2) {
827 char **rr
= split(c
->line
+ 4, 0, SPLIT_QUOTES
, 0, 0);
830 ((disorder_eclient_string_response
*)op
->completed
)(op
->v
, *rr
);
832 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
835 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
838 /* for commands with a simple integer response */
839 static void integer_response_opcallback(disorder_eclient
*c
,
840 struct operation
*op
) {
841 D(("string_response_callback"));
842 if(c
->rc
/ 100 == 2) {
844 ((disorder_eclient_integer_response
*)op
->completed
)
845 (op
->v
, strtol(c
->line
+ 4, 0, 10));
847 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
850 /* for commands with no response */
851 static void no_response_opcallback(disorder_eclient
*c
,
852 struct operation
*op
) {
853 D(("no_response_callback"));
854 if(c
->rc
/ 100 == 2) {
856 ((disorder_eclient_no_response
*)op
->completed
)(op
->v
);
858 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
861 /* error callback for queue_unmarshall */
862 static void eclient_queue_error(const char *msg
,
864 struct operation
*op
= u
;
866 protocol_error(op
->client
, op
, -1, "error parsing queue entry: %s", msg
);
869 /* for commands that expect a queue dump */
870 static void queue_response_opcallback(disorder_eclient
*c
,
871 struct operation
*op
) {
873 struct queue_entry
*q
, *qh
= 0, **qtail
= &qh
, *qlast
= 0;
875 D(("queue_response_callback"));
876 if(c
->rc
/ 100 == 2) {
877 /* parse the queue */
878 for(n
= 0; n
< c
->vec
.nvec
; ++n
) {
879 q
= xmalloc(sizeof *q
);
880 D(("queue_unmarshall %s", c
->vec
.vec
[n
]));
881 if(!queue_unmarshall(q
, c
->vec
.vec
[n
], eclient_queue_error
, op
)) {
889 ((disorder_eclient_queue_response
*)op
->completed
)(op
->v
, qh
);
891 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
895 static void playing_response_opcallback(disorder_eclient
*c
,
896 struct operation
*op
) {
897 struct queue_entry
*q
;
899 D(("playing_response_callback"));
900 if(c
->rc
/ 100 == 2) {
903 if(queue_unmarshall(q
= xmalloc(sizeof *q
), c
->line
+ 4,
904 eclient_queue_error
, c
))
911 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
915 ((disorder_eclient_queue_response
*)op
->completed
)(op
->v
, q
);
917 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
920 /* for commands that expect a list of some sort */
921 static void list_response_opcallback(disorder_eclient
*c
,
922 struct operation
*op
) {
923 D(("list_response_callback"));
924 if(c
->rc
/ 100 == 2) {
926 ((disorder_eclient_list_response
*)op
->completed
)(op
->v
,
930 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
934 static void volume_response_opcallback(disorder_eclient
*c
,
935 struct operation
*op
) {
938 D(("volume_response_callback"));
939 if(c
->rc
/ 100 == 2) {
941 if(sscanf(c
->line
+ 4, "%d %d", &l
, &r
) != 2 || l
< 0 || r
< 0)
942 protocol_error(c
, op
, -1, "%s: invalid volume response: %s",
945 ((disorder_eclient_volume_response
*)op
->completed
)(op
->v
, l
, r
);
948 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
951 static int simple(disorder_eclient
*c
,
952 operation_callback
*opcallback
,
955 const char *cmd
, ...) {
959 vstash_command(c
, 0/*queuejump*/, opcallback
, completed
, v
, cmd
, ap
);
961 /* Give the state machine a kick, since we might be in state_idle */
962 disorder_eclient_polled(c
, 0);
966 /* Commands ******************************************************************/
968 int disorder_eclient_version(disorder_eclient
*c
,
969 disorder_eclient_string_response
*completed
,
971 return simple(c
, string_response_opcallback
, (void (*)())completed
, v
,
972 "version", (char *)0);
975 int disorder_eclient_namepart(disorder_eclient
*c
,
976 disorder_eclient_string_response
*completed
,
981 return simple(c
, string_response_opcallback
, (void (*)())completed
, v
,
982 "part", track
, context
, part
, (char *)0);
985 int disorder_eclient_play(disorder_eclient
*c
,
987 disorder_eclient_no_response
*completed
,
989 return simple(c
, no_response_opcallback
, (void (*)())completed
, v
,
990 "play", track
, (char *)0);
993 int disorder_eclient_pause(disorder_eclient
*c
,
994 disorder_eclient_no_response
*completed
,
996 return simple(c
, no_response_opcallback
, (void (*)())completed
, v
,
1000 int disorder_eclient_resume(disorder_eclient
*c
,
1001 disorder_eclient_no_response
*completed
,
1003 return simple(c
, no_response_opcallback
, (void (*)())completed
, v
,
1004 "resume", (char *)0);
1007 int disorder_eclient_scratch(disorder_eclient
*c
,
1009 disorder_eclient_no_response
*completed
,
1011 return simple(c
, no_response_opcallback
, (void (*)())completed
, v
,
1012 "scratch", id
, (char *)0);
1015 int disorder_eclient_scratch_playing(disorder_eclient
*c
,
1016 disorder_eclient_no_response
*completed
,
1018 return disorder_eclient_scratch(c
, 0, completed
, v
);
1021 int disorder_eclient_remove(disorder_eclient
*c
,
1023 disorder_eclient_no_response
*completed
,
1025 return simple(c
, no_response_opcallback
, (void (*)())completed
, v
,
1026 "remove", id
, (char *)0);
1029 int disorder_eclient_moveafter(disorder_eclient
*c
,
1033 disorder_eclient_no_response
*completed
,
1039 vector_append(&vec
, (char *)"moveafter");
1040 vector_append(&vec
, (char *)target
);
1041 for(n
= 0; n
< nids
; ++n
)
1042 vector_append(&vec
, (char *)ids
[n
]);
1043 stash_command_vector(c
, 0/*queuejump*/, no_response_opcallback
, completed
, v
,
1045 disorder_eclient_polled(c
, 0);
1049 int disorder_eclient_recent(disorder_eclient
*c
,
1050 disorder_eclient_queue_response
*completed
,
1052 return simple(c
, queue_response_opcallback
, (void (*)())completed
, v
,
1053 "recent", (char *)0);
1056 int disorder_eclient_queue(disorder_eclient
*c
,
1057 disorder_eclient_queue_response
*completed
,
1059 return simple(c
, queue_response_opcallback
, (void (*)())completed
, v
,
1060 "queue", (char *)0);
1063 int disorder_eclient_files(disorder_eclient
*c
,
1064 disorder_eclient_list_response
*completed
,
1068 return simple(c
, list_response_opcallback
, (void (*)())completed
, v
,
1069 "files", dir
, re
, (char *)0);
1072 int disorder_eclient_dirs(disorder_eclient
*c
,
1073 disorder_eclient_list_response
*completed
,
1077 return simple(c
, list_response_opcallback
, (void (*)())completed
, v
,
1078 "dirs", dir
, re
, (char *)0);
1081 int disorder_eclient_playing(disorder_eclient
*c
,
1082 disorder_eclient_queue_response
*completed
,
1084 return simple(c
, playing_response_opcallback
, (void (*)())completed
, v
,
1085 "playing", (char *)0);
1088 int disorder_eclient_length(disorder_eclient
*c
,
1089 disorder_eclient_integer_response
*completed
,
1092 return simple(c
, integer_response_opcallback
, (void (*)())completed
, v
,
1093 "length", track
, (char *)0);
1096 int disorder_eclient_volume(disorder_eclient
*c
,
1097 disorder_eclient_volume_response
*completed
,
1100 char sl
[64], sr
[64];
1102 if(l
< 0 && r
< 0) {
1103 return simple(c
, volume_response_opcallback
, (void (*)())completed
, v
,
1104 "volume", (char *)0);
1105 } else if(l
>= 0 && r
>= 0) {
1108 byte_snprintf(sl
, sizeof sl
, "%d", l
);
1109 byte_snprintf(sr
, sizeof sr
, "%d", r
);
1110 return simple(c
, volume_response_opcallback
, (void (*)())completed
, v
,
1111 "volume", sl
, sr
, (char *)0);
1113 assert(!"invalid arguments to disorder_eclient_volume");
1114 return -1; /* gcc is being dim */
1118 int disorder_eclient_enable(disorder_eclient
*c
,
1119 disorder_eclient_no_response
*completed
,
1121 return simple(c
, no_response_opcallback
, (void (*)())completed
, v
,
1122 "enable", (char *)0);
1125 int disorder_eclient_disable(disorder_eclient
*c
,
1126 disorder_eclient_no_response
*completed
,
1128 return simple(c
, no_response_opcallback
, (void (*)())completed
, v
,
1129 "disable", (char *)0);
1132 int disorder_eclient_random_enable(disorder_eclient
*c
,
1133 disorder_eclient_no_response
*completed
,
1135 return simple(c
, no_response_opcallback
, (void (*)())completed
, v
,
1136 "random-enable", (char *)0);
1139 int disorder_eclient_random_disable(disorder_eclient
*c
,
1140 disorder_eclient_no_response
*completed
,
1142 return simple(c
, no_response_opcallback
, (void (*)())completed
, v
,
1143 "random-disable", (char *)0);
1146 int disorder_eclient_get(disorder_eclient
*c
,
1147 disorder_eclient_string_response
*completed
,
1148 const char *track
, const char *pref
,
1150 return simple(c
, string_response_opcallback
, (void (*)())completed
, v
,
1151 "get", track
, pref
, (char *)0);
1154 int disorder_eclient_set(disorder_eclient
*c
,
1155 disorder_eclient_no_response
*completed
,
1156 const char *track
, const char *pref
,
1159 return simple(c
, no_response_opcallback
, (void (*)())completed
, v
,
1160 "set", track
, pref
, value
, (char *)0);
1163 int disorder_eclient_unset(disorder_eclient
*c
,
1164 disorder_eclient_no_response
*completed
,
1165 const char *track
, const char *pref
,
1167 return simple(c
, no_response_opcallback
, (void (*)())completed
, v
,
1168 "unset", track
, pref
, (char *)0);
1171 int disorder_eclient_resolve(disorder_eclient
*c
,
1172 disorder_eclient_string_response
*completed
,
1175 return simple(c
, string_response_opcallback
, (void (*)())completed
, v
,
1176 "resolve", track
, (char *)0);
1179 int disorder_eclient_search(disorder_eclient
*c
,
1180 disorder_eclient_list_response
*completed
,
1183 if(!split(terms
, 0, SPLIT_QUOTES
, 0, 0)) return -1;
1184 return simple(c
, list_response_opcallback
, (void (*)())completed
, v
,
1185 "search", terms
, (char *)0);
1188 int disorder_eclient_nop(disorder_eclient
*c
,
1189 disorder_eclient_no_response
*completed
,
1191 return simple(c
, no_response_opcallback
, (void (*)())completed
, v
,
1195 /** @brief Get the last @p max added tracks
1197 * @param completed Called with list
1198 * @param max Number of tracks to get, 0 for all
1199 * @param v Passed to @p completed
1201 * The first track in the list is the most recently added.
1203 int disorder_eclient_new_tracks(disorder_eclient
*c
,
1204 disorder_eclient_list_response
*completed
,
1209 sprintf(limit
, "%d", max
);
1210 return simple(c
, list_response_opcallback
, (void (*)())completed
, v
,
1211 "new", limit
, (char *)0);
1214 static void rtp_response_opcallback(disorder_eclient
*c
,
1215 struct operation
*op
) {
1216 D(("rtp_response_opcallback"));
1217 if(c
->rc
/ 100 == 2) {
1220 char **vec
= split(c
->line
+ 4, &nvec
, SPLIT_QUOTES
, 0, 0);
1222 ((disorder_eclient_list_response
*)op
->completed
)(op
->v
, nvec
, vec
);
1225 protocol_error(c
, op
, c
->rc
, "%s: %s", c
->ident
, c
->line
);
1228 /** @brief Determine the RTP target address
1230 * @param completed Called with address details
1231 * @param v Passed to @p completed
1233 * The address details will be two elements, the first being the hostname and
1234 * the second the service (port).
1236 int disorder_eclient_rtp_address(disorder_eclient
*c
,
1237 disorder_eclient_list_response
*completed
,
1239 return simple(c
, rtp_response_opcallback
, (void (*)())completed
, v
,
1240 "rtp-address", (char *)0);
1243 /* Log clients ***************************************************************/
1245 /** @brief Monitor the server log
1247 * @param callbacks Functions to call when anything happens
1248 * @param v Passed to @p callbacks functions
1250 * Once a client is being used for logging it cannot be used for anything else.
1251 * There is magic in authuser_opcallback() to re-submit the @c log command
1252 * after reconnection.
1254 * NB that the @c state callback may be called from within this function,
1255 * i.e. not solely later on from the event loop callback.
1257 int disorder_eclient_log(disorder_eclient
*c
,
1258 const disorder_eclient_log_callbacks
*callbacks
,
1260 if(c
->log_callbacks
) return -1;
1261 c
->log_callbacks
= callbacks
;
1263 /* Repoort initial state */
1264 if(c
->log_callbacks
->state
)
1265 c
->log_callbacks
->state(c
->log_v
, c
->statebits
);
1266 stash_command(c
, 0/*queuejump*/, log_opcallback
, 0/*completed*/, v
,
1271 /* If we get here we've stopped being a log client */
1272 static void log_opcallback(disorder_eclient
*c
,
1273 struct operation
attribute((unused
)) *op
) {
1274 D(("log_opcallback"));
1275 c
->log_callbacks
= 0;
1279 /* error callback for log line parsing */
1280 static void logline_error(const char *msg
, void *u
) {
1281 disorder_eclient
*c
= u
;
1282 protocol_error(c
, c
->ops
, -1, "error parsing log line: %s", msg
);
1285 /* process a single log line */
1286 static void logline(disorder_eclient
*c
, const char *line
) {
1291 D(("logline [%s]", line
));
1292 vec
= split(line
, &nvec
, SPLIT_QUOTES
, logline_error
, c
);
1293 if(nvec
< 2) return; /* probably an error, already
1295 if(sscanf(vec
[0], "%"SCNxMAX
, &when
) != 1) {
1296 /* probably the wrong side of a format change */
1297 protocol_error(c
, c
->ops
, -1, "invalid log timestamp '%s'", vec
[0]);
1300 /* TODO: do something with the time */
1301 n
= TABLE_FIND(logentry_handlers
, struct logentry_handler
, name
, vec
[1]);
1302 if(n
< 0) return; /* probably a future command */
1305 if(nvec
< logentry_handlers
[n
].min
|| nvec
> logentry_handlers
[n
].max
)
1307 logentry_handlers
[n
].handler(c
, nvec
, vec
);
1310 static void logentry_completed(disorder_eclient
*c
,
1311 int attribute((unused
)) nvec
, char **vec
) {
1312 if(!c
->log_callbacks
->completed
) return;
1313 c
->statebits
&= ~DISORDER_PLAYING
;
1314 c
->log_callbacks
->completed(c
->log_v
, vec
[0]);
1315 if(c
->log_callbacks
->state
)
1316 c
->log_callbacks
->state(c
->log_v
, c
->statebits
| DISORDER_CONNECTED
);
1319 static void logentry_failed(disorder_eclient
*c
,
1320 int attribute((unused
)) nvec
, char **vec
) {
1321 if(!c
->log_callbacks
->failed
)return;
1322 c
->statebits
&= ~DISORDER_PLAYING
;
1323 c
->log_callbacks
->failed(c
->log_v
, vec
[0], vec
[1]);
1324 if(c
->log_callbacks
->state
)
1325 c
->log_callbacks
->state(c
->log_v
, c
->statebits
| DISORDER_CONNECTED
);
1328 static void logentry_moved(disorder_eclient
*c
,
1329 int attribute((unused
)) nvec
, char **vec
) {
1330 if(!c
->log_callbacks
->moved
) return;
1331 c
->log_callbacks
->moved(c
->log_v
, vec
[0]);
1334 static void logentry_playing(disorder_eclient
*c
,
1335 int attribute((unused
)) nvec
, char **vec
) {
1336 if(!c
->log_callbacks
->playing
) return;
1337 c
->statebits
|= DISORDER_PLAYING
;
1338 c
->log_callbacks
->playing(c
->log_v
, vec
[0], vec
[1]);
1339 if(c
->log_callbacks
->state
)
1340 c
->log_callbacks
->state(c
->log_v
, c
->statebits
| DISORDER_CONNECTED
);
1343 static void logentry_queue(disorder_eclient
*c
,
1344 int attribute((unused
)) nvec
, char **vec
) {
1345 struct queue_entry
*q
;
1347 if(!c
->log_callbacks
->completed
) return;
1348 q
= xmalloc(sizeof *q
);
1349 if(queue_unmarshall_vec(q
, nvec
, vec
, eclient_queue_error
, c
))
1351 c
->log_callbacks
->queue(c
->log_v
, q
);
1354 static void logentry_recent_added(disorder_eclient
*c
,
1355 int attribute((unused
)) nvec
, char **vec
) {
1356 struct queue_entry
*q
;
1358 if(!c
->log_callbacks
->recent_added
) return;
1359 q
= xmalloc(sizeof *q
);
1360 if(queue_unmarshall_vec(q
, nvec
, vec
, eclient_queue_error
, c
))
1362 c
->log_callbacks
->recent_added(c
->log_v
, q
);
1365 static void logentry_recent_removed(disorder_eclient
*c
,
1366 int attribute((unused
)) nvec
, char **vec
) {
1367 if(!c
->log_callbacks
->recent_removed
) return;
1368 c
->log_callbacks
->recent_removed(c
->log_v
, vec
[0]);
1371 static void logentry_removed(disorder_eclient
*c
,
1372 int attribute((unused
)) nvec
, char **vec
) {
1373 if(!c
->log_callbacks
->removed
) return;
1374 c
->log_callbacks
->removed(c
->log_v
, vec
[0], vec
[1]);
1377 static void logentry_rescanned(disorder_eclient
*c
,
1378 int attribute((unused
)) nvec
,
1379 char attribute((unused
)) **vec
) {
1380 if(!c
->log_callbacks
->rescanned
) return;
1381 c
->log_callbacks
->rescanned(c
->log_v
);
1384 static void logentry_scratched(disorder_eclient
*c
,
1385 int attribute((unused
)) nvec
, char **vec
) {
1386 if(!c
->log_callbacks
->scratched
) return;
1387 c
->statebits
&= ~DISORDER_PLAYING
;
1388 c
->log_callbacks
->scratched(c
->log_v
, vec
[0], vec
[1]);
1389 if(c
->log_callbacks
->state
)
1390 c
->log_callbacks
->state(c
->log_v
, c
->statebits
| DISORDER_CONNECTED
);
1393 static const struct {
1396 const char *disable
;
1397 } statestrings
[] = {
1398 { DISORDER_PLAYING_ENABLED
, "enable_play", "disable_play" },
1399 { DISORDER_RANDOM_ENABLED
, "enable_random", "disable_random" },
1400 { DISORDER_TRACK_PAUSED
, "pause", "resume" },
1401 { DISORDER_PLAYING
, "playing", "completed" },
1402 { DISORDER_PLAYING
, 0, "scratched" },
1403 { DISORDER_PLAYING
, 0, "failed" },
1405 #define NSTATES (int)(sizeof statestrings / sizeof *statestrings)
1407 static void logentry_state(disorder_eclient
*c
,
1408 int attribute((unused
)) nvec
, char **vec
) {
1411 for(n
= 0; n
< NSTATES
; ++n
)
1412 if(statestrings
[n
].enable
&& !strcmp(vec
[0], statestrings
[n
].enable
)) {
1413 c
->statebits
|= statestrings
[n
].bit
;
1415 } else if(statestrings
[n
].disable
&& !strcmp(vec
[0], statestrings
[n
].disable
)) {
1416 c
->statebits
&= ~statestrings
[n
].bit
;
1419 if(!c
->log_callbacks
->state
) return;
1420 c
->log_callbacks
->state(c
->log_v
, c
->statebits
| DISORDER_CONNECTED
);
1423 static void logentry_volume(disorder_eclient
*c
,
1424 int attribute((unused
)) nvec
, char **vec
) {
1427 if(!c
->log_callbacks
->volume
) return;
1428 if(xstrtol(&l
, vec
[0], 0, 10)
1429 || xstrtol(&r
, vec
[1], 0, 10)
1430 || l
< 0 || l
> INT_MAX
1431 || r
< 0 || r
> INT_MAX
)
1433 c
->log_callbacks
->volume(c
->log_v
, (int)l
, (int)r
);
1436 /** @brief Convert @p statebits to a string */
1437 char *disorder_eclient_interpret_state(unsigned long statebits
) {
1441 static const struct {
1445 { DISORDER_PLAYING_ENABLED
, "playing_enabled" },
1446 { DISORDER_RANDOM_ENABLED
, "random_enabled" },
1447 { DISORDER_TRACK_PAUSED
, "track_paused" },
1448 { DISORDER_PLAYING
, "playing" },
1449 { DISORDER_CONNECTED
, "connected" },
1451 #define NBITS (sizeof bits / sizeof *bits)
1455 dynstr_append(d
, '0');
1456 for(n
= 0; n
< NBITS
; ++n
)
1457 if(statebits
& bits
[n
].bit
) {
1459 dynstr_append(d
, '|');
1460 dynstr_append_string(d
, bits
[n
].name
);
1461 statebits
^= bits
[n
].bit
;
1467 dynstr_append(d
, '|');
1468 sprintf(s
, "%#lx", statebits
);
1469 dynstr_append_string(d
, s
);
1471 dynstr_terminate(d
);
1480 indent-tabs-mode:nil