1 ;;; zeroconf.el --- Service browser using Avahi. -*- lexical-binding:t -*-
3 ;; Copyright (C) 2008-2017 Free Software Foundation, Inc.
5 ;; Author: Michael Albinus <michael.albinus@gmx.de>
6 ;; Keywords: comm, hardware
8 ;; This file is part of GNU Emacs.
10 ;; GNU Emacs is free software: you can redistribute it and/or modify
11 ;; it under the terms of the GNU General Public License as published by
12 ;; the Free Software Foundation, either version 3 of the License, or
13 ;; (at your option) any later version.
15 ;; GNU Emacs is distributed in the hope that it will be useful,
16 ;; but WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;; GNU General Public License for more details.
20 ;; You should have received a copy of the GNU General Public License
21 ;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
25 ;; This package provides an interface to the Avahi, the zeroconf
26 ;; daemon under GNU/Linux. The communication mean with Avahi is
29 ;; In order to activate this package, you must add the following code
32 ;; (require 'zeroconf)
33 ;; (zeroconf-init "dns-sd.org")
35 ;; "dns-sd.org" is an example the domain you wish to resolve services
36 ;; for. It can also be nil or "", which means the default local
39 ;; The `zeroconf-init' function installs several handlers, which are
40 ;; activated by D-Bus signals sent from the Avahi daemon.
41 ;; Immediately, when a service is added or removed in the domain, a
42 ;; corresponding handler in Emacs is called.
47 ;; The main purpose of zeroconf is service discovery. This means,
48 ;; that services are detected as soon as they appear or disappear in a
49 ;; given domain. A service is offered by a network device. It is
50 ;; assigned to a service type.
52 ;; In order to see all offered service types of the initialized
53 ;; domain, you can call
55 ;; (zeroconf-list-service-types)
57 ;; Service types are described at <http://www.dns-sd.org/ServiceTypes.html>.
58 ;; Detected services for a given service type, let's say "_ipp._tcp",
61 ;; (zeroconf-list-services "_ipp._tcp")
63 ;; It is possible to register an own handler (function) to be called
64 ;; when a service has been added or removed in the domain. The
65 ;; service type "_ipp._tcp" is used for printer services supporting
66 ;; the Internet Printing Protocol.
68 ;; (defun my-add-printer (service)
69 ;; (message "Printer `%s' detected" (zeroconf-service-name service)))
71 ;; (defun my-remove-printer (service)
72 ;; (message "Printer `%s' removed" (zeroconf-service-name service)))
74 ;; (zeroconf-service-add-hook "_ipp._tcp" :new 'my-add-printer)
75 ;; (zeroconf-service-add-hook "_ipp._tcp" :removed 'my-remove-printer)
77 ;; There are several functions returning information about a service,
78 ;; see the doc string of `zeroconf-service-add-hook'.
83 ;; The function `zeroconf-publish-service' publishes a new service to
84 ;; the Avahi daemon. Although the domain, where to the service is
85 ;; published, can be specified by this function, it is usually the
86 ;; default domain "local" (also written as nil or "").
88 ;; (zeroconf-publish-service
89 ;; "Example service" ;; Service name.
90 ;; "_example._tcp" ;; Service type.
91 ;; nil ;; Default domain ("local").
92 ;; nil ;; Default host (concat (getenv "HOST") ".local").
93 ;; 111 ;; Port number of the host, the service is offered.
94 ;; "1.2.3.4" ;; IPv4 address of the host.
95 ;; '("version=1.0" ;; TXT fields describing the service.
98 ;; The lifetime of a published service is the lifetime of Emacs.
102 (eval-when-compile (require 'cl-lib
))
106 (defvar zeroconf-debug nil
107 "Write messages during service discovery")
109 (defconst zeroconf-service-avahi
"org.freedesktop.Avahi"
110 "The D-Bus name used to talk to Avahi.")
112 (defconst zeroconf-path-avahi
"/"
113 "The D-Bus root object path used to talk to Avahi.")
115 (defvar zeroconf-path-avahi-service-type-browser nil
116 "The D-Bus object path used to talk to the Avahi service type browser.")
118 (defvar zeroconf-path-avahi-service-browser-hash
(make-hash-table :test
'equal
)
119 "The D-Bus object paths used to talk to the Avahi service browser.")
121 (defvar zeroconf-path-avahi-service-resolver-hash
(make-hash-table :test
'equal
)
122 "The D-Bus object paths used to talk to the Avahi service resolver.")
124 ;; Methods: "Free", "Commit", "Reset", "GetState", "IsEmpty",
125 ;; "AddService", "AddServiceSubtype", "UpdateServiceTxt", "AddAddress"
127 ;; Signals: "StateChanged".
128 (defconst zeroconf-interface-avahi-entry-group
129 (concat zeroconf-service-avahi
".EntryGroup")
130 "The D-Bus entry group interface exported by Avahi.")
132 ;; Methods: "GetVersionString", "GetAPIVersion", "GetHostName",
133 ;; "SetHostName", "GetHostNameFqdn", "GetDomainName",
134 ;; "IsNSSSupportAvailable", "GetState", "GetLocalServiceCookie",
135 ;; "GetAlternativeHostName", "GetAlternativeServiceName",
136 ;; "GetNetworkInterfaceNameByIndex", "GetNetworkInterfaceIndexByName",
137 ;; "ResolveHostName", "ResolveAddress", "ResolveService",
138 ;; "EntryGroupNew", "DomainBrowserNew", "ServiceTypeBrowserNew",
139 ;; "ServiceBrowserNew", "ServiceResolverNew", "HostNameResolverNew",
140 ;; "AddressResolverNew" and "RecordBrowserNew".
141 ;; Signals: "StateChanged".
142 (defconst zeroconf-interface-avahi-server
143 (concat zeroconf-service-avahi
".Server")
144 "The D-Bus server interface exported by Avahi.")
147 ;; Signals: "ItemNew", "ItemRemove", "CacheExhausted", "AllForNow" and
149 (defconst zeroconf-interface-avahi-service-type-browser
150 (concat zeroconf-service-avahi
".ServiceTypeBrowser")
151 "The D-Bus service type browser interface exported by Avahi.")
154 ;; Signals: "ItemNew", "ItemRemove", "CacheExhausted", "AllForNow" and
156 (defconst zeroconf-interface-avahi-service-browser
157 (concat zeroconf-service-avahi
".ServiceBrowser")
158 "The D-Bus service browser interface exported by Avahi.")
161 ;; Available signals are "Found" and "Failure".
162 (defconst zeroconf-interface-avahi-service-resolver
163 (concat zeroconf-service-avahi
".ServiceResolver")
164 "The D-Bus service resolver interface exported by Avahi.")
166 (defconst zeroconf-avahi-interface-unspec -
1
167 "Wildcard Avahi interface spec.")
169 (defconst zeroconf-avahi-protocol-unspec -
1
170 "Wildcard Avahi protocol spec.")
172 (defconst zeroconf-avahi-protocol-inet4
0
173 "Avahi INET4 address protocol family.")
175 (defconst zeroconf-avahi-protocol-inet6
1
176 "Avahi INET6 address protocol family.")
178 (defconst zeroconf-avahi-domain-unspec
""
179 "Empty Avahi domain.")
181 (defvar zeroconf-avahi-current-domain zeroconf-avahi-domain-unspec
182 "Domain name services are resolved for.")
184 (defconst zeroconf-avahi-flags-unspec
0
188 ;;; Services retrieval.
190 (defvar zeroconf-services-hash
(make-hash-table :test
'equal
)
191 "Hash table of discovered Avahi services.
193 The key of an entry is the concatenation of the service name and
194 service type of a discovered service. The value is the service
195 itself. The format of a service is
197 \(INTERFACE PROTOCOL NAME TYPE DOMAIN FLAGS)
199 The INTERFACE is a number, which represents the network interface
200 the service is located at. The corresponding network interface
201 name, like \"eth0\", can be retrieved with the function
202 `zeroconf-get-interface-name'.
204 PROTOCOL describes the used network protocol family the service
205 can be accessed. `zeroconf-avahi-protocol-inet4' means INET4,
206 `zeroconf-avahi-protocol-inet6' means INET6. An unspecified
207 protocol family is coded with `zeroconf-avahi-protocol-unspec'.
209 NAME is the string the service is known at Avahi. A service can
210 be known under the same name for different service types.
212 Each TYPE stands for a discovered service type of Avahi. The
213 format is described in RFC 2782. It is of the form
215 \"_APPLICATION-PROTOCOL._TRANSPORT-PROTOCOL\".
217 TRANSPORT-PROTOCOL must be either \"tcp\" or \"udp\".
218 APPLICATION-PROTOCOL must be a protocol name as specified in URL
219 `http://www.dns-sd.org/ServiceTypes.html'. Typical service types
220 are \"_workstation._tcp\" or \"_printer._tcp\".
222 DOMAIN is the domain name the service is registered in, like \"local\".
224 FLAGS, an integer, is used inside Avahi. When publishing a
225 service (see `zeroconf-publish-service', the flag 0 is used.")
227 (defvar zeroconf-resolved-services-hash
(make-hash-table :test
'equal
)
228 "Hash table of resolved Avahi services.
229 The key of an entry is the concatenation of the service name and
230 service type of a resolved service. The value is the service
231 itself. The format of a service is
233 (INTERFACE PROTOCOL NAME TYPE DOMAIN HOST APROTOCOL ADDRESS PORT TXT FLAGS)
235 INTERFACE, PROTOCOL, NAME, TYPE, DOMAIN and FLAGS have the same
236 meaning as in `zeroconf-services-hash'.
238 HOST is the host name the service is registered. It is a fully
239 qualified name, i.e., it contains DOMAIN.
241 APROTOCOL stands for the network protocol family ADDRESS is
242 encoded (`zeroconf-avahi-protocol-inet4' means INET4,
243 `zeroconf-avahi-protocol-inet6' means INET6). It can be
244 different from PROTOCOL, when an address resolution has been
245 requested for another protocol family but the default one.
247 ADDRESS is the service address, encoded according to the
248 APROTOCOL network protocol family. PORT is the corresponding
249 port the service can be reached on ADDRESS.
251 TXT is an array of strings, describing additional attributes of
252 the service. Usually, every string is a key=value pair. The
253 supported keys depend on the service type.")
255 (defun zeroconf-list-service-names ()
256 "Returns all discovered Avahi service names as list."
259 (lambda (_key value
) (add-to-list 'result
(zeroconf-service-name value
)))
260 zeroconf-services-hash
)
263 (defun zeroconf-list-service-types ()
264 "Returns all discovered Avahi service types as list."
267 (lambda (_key value
) (add-to-list 'result
(zeroconf-service-type value
)))
268 zeroconf-services-hash
)
271 (defun zeroconf-list-services (type)
272 "Returns all discovered Avahi services for a given service type TYPE.
273 The service type is one of the returned values of
274 `zeroconf-list-service-types'. The return value is a list
275 \(SERVICE1 SERVICE2 ...). See `zeroconf-services-hash' for the
280 (when (equal type
(zeroconf-service-type value
))
281 (add-to-list 'result value
)))
282 zeroconf-services-hash
)
285 (defvar zeroconf-service-added-hooks-hash
(make-hash-table :test
'equal
)
286 "Hash table of hooks for newly added services.
287 The key of an entry is a service type.")
289 (defvar zeroconf-service-removed-hooks-hash
(make-hash-table :test
'equal
)
290 "Hash table of hooks for removed services.
291 The key of an entry is a service type.")
293 (defun zeroconf-service-add-hook (type event function
)
294 "Add FUNCTION to the hook of service type TYPE.
296 EVENT must be either `:new' or `:removed', indicating whether
297 FUNCTION shall be called when a new service has been newly
298 detected, or removed.
300 FUNCTION must accept one argument SERVICE, which identifies the
301 new service. Initially, when EVENT is :new, FUNCTION is called
302 for all already detected services of service type TYPE.
304 The attributes of SERVICE can be retrieved via the functions
306 `zeroconf-service-interface'
307 `zeroconf-service-protocol'
308 `zeroconf-service-name'
309 `zeroconf-service-type'
310 `zeroconf-service-domain'
311 `zeroconf-service-flags'
312 `zeroconf-service-host'
313 `zeroconf-service-aprotocol'
314 `zeroconf-service-address'
315 `zeroconf-service-port'
316 `zeroconf-service-txt'"
320 (cl-pushnew function
(gethash type zeroconf-service-added-hooks-hash
)
322 (dolist (service (zeroconf-list-services type
))
323 (funcall function service
)))
324 ((equal event
:removed
)
325 (cl-pushnew function
(gethash type zeroconf-service-removed-hooks-hash
)
327 (t (error "EVENT must be either `:new' or `:removed'"))))
329 (defun zeroconf-service-remove-hook (type event function
)
330 "Remove FUNCTION from the hook of service type TYPE.
332 EVENT must be either :new or :removed and has to match the event
333 type used when registering FUNCTION."
334 (let* ((table (pcase event
335 (:new zeroconf-service-added-hooks-hash
)
336 (:removed zeroconf-service-removed-hooks-hash
)
337 (_ (error "EVENT must be either `:new' or `:removed'"))))
338 (functions (remove function
(gethash type table
))))
340 (puthash type functions table
)
341 (remhash type table
))))
343 (defun zeroconf-get-host ()
344 "Returns the local host name as string."
346 :system zeroconf-service-avahi zeroconf-path-avahi
347 zeroconf-interface-avahi-server
"GetHostName"))
349 (defun zeroconf-get-domain ()
350 "Returns the domain name as string."
352 :system zeroconf-service-avahi zeroconf-path-avahi
353 zeroconf-interface-avahi-server
"GetDomainName"))
355 (defun zeroconf-get-host-domain ()
356 "Returns the local host name FQDN as string."
358 :system zeroconf-service-avahi zeroconf-path-avahi
359 zeroconf-interface-avahi-server
"GetHostNameFqdn"))
361 (defun zeroconf-get-interface-name (number)
362 "Return the interface name of internal interface NUMBER."
364 :system zeroconf-service-avahi zeroconf-path-avahi
365 zeroconf-interface-avahi-server
"GetNetworkInterfaceNameByIndex"
368 (defun zeroconf-get-interface-number (name)
369 "Return the internal interface number of interface NAME."
371 :system zeroconf-service-avahi zeroconf-path-avahi
372 zeroconf-interface-avahi-server
"GetNetworkInterfaceIndexByName"
375 (defun zeroconf-get-service (name type
)
376 "Return the service description of service NAME as list.
377 NAME must be a string. The service must be of service type
378 TYPE. The resulting list has the format
380 (INTERFACE PROTOCOL NAME TYPE DOMAIN FLAGS)."
381 ;; Due to the service browser, all known services are kept in
382 ;; `zeroconf-services-hash'.
383 (gethash (concat name
"/" type
) zeroconf-services-hash nil
))
385 (defun zeroconf-resolve-service (service)
386 "Return all service attributes SERVICE as list.
387 NAME must be a string. The service must be of service type
388 TYPE. The resulting list has the format
390 (INTERFACE PROTOCOL NAME TYPE DOMAIN HOST APROTOCOL ADDRESS PORT TXT FLAGS)."
391 (let* ((name (zeroconf-service-name service
))
392 (type (zeroconf-service-type service
))
393 (key (concat name
"/" type
)))
396 ;; Check whether we know this service already.
397 (gethash key zeroconf-resolved-services-hash nil
)
399 ;; Resolve the service. We don't propagate D-Bus errors.
403 :system zeroconf-service-avahi zeroconf-path-avahi
404 zeroconf-interface-avahi-server
"ResolveService"
405 zeroconf-avahi-interface-unspec
406 zeroconf-avahi-protocol-unspec
408 zeroconf-avahi-current-domain
409 zeroconf-avahi-protocol-unspec
410 zeroconf-avahi-flags-unspec
))
411 (elt (nth 9 result
))) ;; TXT.
412 ;; The TXT field has the signature "aay". Transform to "as".
414 (setcar elt
(dbus-byte-array-to-string (car elt
)))
415 (setq elt
(cdr elt
)))
417 (when nil
;; We discard it, no use so far.
418 ;; Register a service resolver.
419 (let ((object-path (zeroconf-register-service-resolver name type
)))
420 ;; Register the signals.
421 (dolist (member '("Found" "Failure"))
422 (dbus-register-signal
423 :system zeroconf-service-avahi object-path
424 zeroconf-interface-avahi-service-resolver member
425 'zeroconf-service-resolver-handler
)))
428 ;; Return the resolved service.
429 (puthash key result zeroconf-resolved-services-hash
))))))
431 (defun zeroconf-service-interface (service)
432 "Return the internal interface number of SERVICE."
435 (defun zeroconf-service-protocol (service)
436 "Return the protocol number of SERVICE."
439 (defun zeroconf-service-name (service)
440 "Return the service name of SERVICE."
443 (defun zeroconf-service-type (service)
444 "Return the type name of SERVICE."
447 (defun zeroconf-service-domain (service)
448 "Return the domain name of SERVICE."
451 (defun zeroconf-service-flags (service)
452 "Return the flags of SERVICE."
455 (defun zeroconf-service-host (service)
456 "Return the host name of SERVICE."
457 (nth 5 (zeroconf-resolve-service service
)))
459 (defun zeroconf-service-aprotocol (service)
460 "Return the aprotocol number of SERVICE."
461 (nth 6 (zeroconf-resolve-service service
)))
463 (defun zeroconf-service-address (service)
464 "Return the IP address of SERVICE."
465 (nth 7 (zeroconf-resolve-service service
)))
467 (defun zeroconf-service-port (service)
468 "Return the port number of SERVICE."
469 (nth 8 (zeroconf-resolve-service service
)))
471 (defun zeroconf-service-txt (service)
472 "Return the text strings of SERVICE."
473 (nth 9 (zeroconf-resolve-service service
)))
476 ;;; Services signaling.
478 ;; Register for the service type browser. Service registrations will
479 ;; happen in `zeroconf-service-type-browser-handler', when there is an
480 ;; "ItemNew" signal from the service type browser.
481 (defun zeroconf-init (&optional domain
)
482 "Instantiate an Avahi service type browser for domain DOMAIN.
483 DOMAIN is a string, like \"dns-sd.org\" or \"local\". When
484 DOMAIN is nil, the local domain is used."
485 (when (and (or (null domain
) (stringp domain
))
486 (dbus-ping :system zeroconf-service-avahi
)
488 :system zeroconf-service-avahi zeroconf-path-avahi
489 zeroconf-interface-avahi-server
"GetVersionString"))
491 ;; Reset all stored values.
492 (setq zeroconf-path-avahi-service-type-browser nil
493 zeroconf-avahi-current-domain
(or domain
494 zeroconf-avahi-domain-unspec
))
495 (clrhash zeroconf-path-avahi-service-browser-hash
)
496 (clrhash zeroconf-path-avahi-service-resolver-hash
)
497 (clrhash zeroconf-services-hash
)
498 (clrhash zeroconf-resolved-services-hash
)
499 (clrhash zeroconf-service-added-hooks-hash
)
500 (clrhash zeroconf-service-removed-hooks-hash
)
502 ;; Register a service type browser.
503 (let ((object-path (zeroconf-register-service-type-browser)))
504 ;; Register the signals.
505 (dolist (member '("ItemNew" "ItemRemove" "Failure"))
506 (dbus-register-signal
507 :system zeroconf-service-avahi object-path
508 zeroconf-interface-avahi-service-type-browser member
509 'zeroconf-service-type-browser-handler
)))
511 ;; Register state changed signal.
512 (dbus-register-signal
513 :system zeroconf-service-avahi zeroconf-path-avahi
514 zeroconf-interface-avahi-service-type-browser
"StateChanged"
515 'zeroconf-service-type-browser-handler
)))
517 (defun zeroconf-register-service-type-browser ()
518 "Register a service type browser at the Avahi daemon."
519 (or zeroconf-path-avahi-service-type-browser
520 (setq zeroconf-path-avahi-service-type-browser
522 :system zeroconf-service-avahi zeroconf-path-avahi
523 zeroconf-interface-avahi-server
"ServiceTypeBrowserNew"
524 zeroconf-avahi-interface-unspec
525 zeroconf-avahi-protocol-unspec
526 zeroconf-avahi-current-domain
527 zeroconf-avahi-flags-unspec
))))
529 (defun zeroconf-service-type-browser-handler (&rest val
)
530 "Registered service type browser handler at the Avahi daemon."
532 (message "zeroconf-service-type-browser-handler: %s %S"
533 (dbus-event-member-name last-input-event
) val
))
535 ((string-equal (dbus-event-member-name last-input-event
) "ItemNew")
536 ;; Parameters: (interface protocol type domain flags)
537 ;; Register a service browser.
538 (let ((object-path (zeroconf-register-service-browser (nth 2 val
))))
539 ;; Register the signals.
540 (dolist (member '("ItemNew" "ItemRemove" "Failure"))
541 (dbus-register-signal
542 :system zeroconf-service-avahi object-path
543 zeroconf-interface-avahi-service-browser member
544 'zeroconf-service-browser-handler
))))))
546 (defun zeroconf-register-service-browser (type)
547 "Register a service browser at the Avahi daemon."
548 (or (gethash type zeroconf-path-avahi-service-browser-hash nil
)
551 :system zeroconf-service-avahi zeroconf-path-avahi
552 zeroconf-interface-avahi-server
"ServiceBrowserNew"
553 zeroconf-avahi-interface-unspec
554 zeroconf-avahi-protocol-unspec
556 zeroconf-avahi-current-domain
557 zeroconf-avahi-flags-unspec
)
558 zeroconf-path-avahi-service-browser-hash
)))
560 (defun zeroconf-service-browser-handler (&rest val
)
561 "Registered service browser handler at the Avahi daemon."
562 ;; Parameters: (interface protocol name type domain flags)
564 (message "zeroconf-service-browser-handler: %s %S"
565 (dbus-event-member-name last-input-event
) val
))
566 (let* ((name (zeroconf-service-name val
))
567 (type (zeroconf-service-type val
))
568 (key (concat name
"/" type
))
569 (ahook (gethash type zeroconf-service-added-hooks-hash nil
))
570 (rhook (gethash type zeroconf-service-removed-hooks-hash nil
)))
572 ((string-equal (dbus-event-member-name last-input-event
) "ItemNew")
574 (puthash key val zeroconf-services-hash
)
575 (dolist (f ahook
) (funcall f val
)))
577 ((string-equal (dbus-event-member-name last-input-event
) "ItemRemove")
578 ;; Remove the service.
579 (remhash key zeroconf-services-hash
)
580 (remhash key zeroconf-resolved-services-hash
)
581 (dolist (f rhook
) (funcall f val
))))))
583 (defun zeroconf-register-service-resolver (name type
)
584 "Register a service resolver at the Avahi daemon."
585 (let ((key (concat name
"/" type
)))
586 (or (gethash key zeroconf-path-avahi-service-resolver-hash nil
)
589 :system zeroconf-service-avahi zeroconf-path-avahi
590 zeroconf-interface-avahi-server
"ServiceResolverNew"
591 zeroconf-avahi-interface-unspec
592 zeroconf-avahi-protocol-unspec
594 zeroconf-avahi-current-domain
595 zeroconf-avahi-protocol-unspec
596 zeroconf-avahi-flags-unspec
)
597 zeroconf-resolved-services-hash
))))
599 (defun zeroconf-service-resolver-handler (&rest val
)
600 "Registered service resolver handler at the Avahi daemon."
601 ;; Parameters: (interface protocol name type domain host aprotocol
602 ;; address port txt flags)
603 ;; The "TXT" field has the signature "aay". Transform to "as".
604 (let ((elt (nth 9 val
)))
606 (setcar elt
(dbus-byte-array-to-string (car elt
)))
607 (setq elt
(cdr elt
))))
609 (message "zeroconf-service-resolver-handler: %s %S"
610 (dbus-event-member-name last-input-event
) val
))
612 ;; A new service has been detected. Add it to
613 ;; `zeroconf-resolved-services-hash'.
614 ((string-equal (dbus-event-member-name last-input-event
) "Found")
616 (concat (zeroconf-service-name val
) "/" (zeroconf-service-type val
))
617 val zeroconf-resolved-services-hash
))))
620 ;;; Services publishing.
622 (defun zeroconf-publish-service (name type domain host port address txt
)
623 "Publish a service at the Avahi daemon.
624 For the description of arguments, see `zeroconf-resolved-services-hash'."
625 ;; NAME and TYPE must not be empty.
626 (when (zerop (length name
))
627 (error "Invalid argument NAME: %s" name
))
628 (when (zerop (length type
))
629 (error "Invalid argument TYPE: %s" type
))
631 ;; Set default values for DOMAIN, HOST and PORT.
632 (when (zerop (length domain
))
633 (setq domain
(zeroconf-get-domain)))
634 (when (zerop (length host
))
635 (setq host
(zeroconf-get-host-domain)))
639 ;; Create an entry in the daemon.
642 :system zeroconf-service-avahi zeroconf-path-avahi
643 zeroconf-interface-avahi-server
"EntryGroupNew"))
646 ;; The TXT field has the signature "as". Transform to "aay".
648 (cl-pushnew (dbus-string-to-byte-array elt
) result
:test
#'equal
))
652 :system zeroconf-service-avahi object-path
653 zeroconf-interface-avahi-entry-group
"AddService"
654 zeroconf-avahi-interface-unspec
655 zeroconf-avahi-protocol-unspec
656 zeroconf-avahi-flags-unspec
657 name type domain host
:uint16 port
(append '(:array
) result
))
660 (unless (zerop (length address
))
662 :system zeroconf-service-avahi object-path
663 zeroconf-interface-avahi-entry-group
"AddAddress"
664 zeroconf-avahi-interface-unspec
665 zeroconf-avahi-protocol-unspec
666 zeroconf-avahi-flags-unspec
669 ;; Make it persistent in the daemon.
671 :system zeroconf-service-avahi object-path
672 zeroconf-interface-avahi-entry-group
"Commit")))
676 ;;; zeroconf.el ends here