7 This file is part of avahi.
9 avahi is free software; you can redistribute it and/or modify it
10 under the terms of the GNU Lesser General Public License as
11 published by the Free Software Foundation; either version 2.1 of the
12 License, or (at your option) any later version.
14 avahi is distributed in the hope that it will be useful, but WITHOUT
15 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
16 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
17 Public License for more details.
19 You should have received a copy of the GNU Lesser General Public
20 License along with avahi; if not, write to the Free Software
21 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
27 /** \file core.h The Avahi Multicast DNS and DNS Service Discovery implmentation. */
29 /** \example publish-service.c Example how to register a DNS-SD
30 * service using an embedded mDNS stack. It behaves like a network
31 * printer registering both an IPP and a BSD LPR service. */
33 /** \example browse-services.c Example how to browse for DNS-SD
34 * services using an embedded mDNS stack. */
36 #include <avahi-common/cdecl.h>
38 #ifndef DOXYGEN_SHOULD_SKIP_THIS
42 /** An mDNS responder object */
43 typedef struct AvahiServer AvahiServer;
45 /** A locally registered DNS resource record */
46 typedef struct AvahiEntry AvahiEntry;
48 /** A group of locally registered DNS RRs */
49 typedef struct AvahiEntryGroup AvahiEntryGroup;
51 #ifndef DOXYGEN_SHOULD_SKIP_THIS
55 #include <avahi-common/address.h>
56 #include <avahi-common/rr.h>
57 #include <avahi-common/alternative.h>
59 #ifndef DOXYGEN_SHOULD_SKIP_THIS
63 /** Error codes used by avahi */
65 AVAHI_OK = 0, /**< OK */
66 AVAHI_ERR_FAILURE = -1, /**< Generic error code */
67 AVAHI_ERR_BAD_STATE = -2, /**< Object was in a bad state */
68 AVAHI_ERR_INVALID_HOST_NAME = -3, /**< Invalid host name */
69 AVAHI_ERR_INVALID_DOMAIN_NAME = -4, /**< Invalid domain name */
70 AVAHI_ERR_NO_NETWORK = -5, /**< No suitable network protocol available */
71 AVAHI_ERR_INVALID_TTL = -6, /**< Invalid DNS TTL */
72 AVAHI_ERR_IS_PATTERN = -7, /**< RR key is pattern */
73 AVAHI_ERR_LOCAL_COLLISION = -8, /**< Local name collision */
74 AVAHI_ERR_INVALID_RECORD = -9, /**< Invalid RR */
75 AVAHI_ERR_INVALID_SERVICE_NAME = -10, /**< Invalid service name */
76 AVAHI_ERR_INVALID_SERVICE_TYPE = -11, /**< Invalid service type */
77 AVAHI_ERR_INVALID_PORT = -12, /**< Invalid port number */
78 AVAHI_ERR_INVALID_KEY = -13, /**< Invalid key */
79 AVAHI_ERR_INVALID_ADDRESS = -14, /**< Invalid address */
80 AVAHI_ERR_TIMEOUT = -15, /**< Timeout reached */
81 AVAHI_ERR_TOO_MANY_CLIENTS = -16, /**< Too many clients */
82 AVAHI_ERR_TOO_MANY_OBJECTS = -17, /**< Too many objects */
83 AVAHI_ERR_TOO_MANY_ENTRIES = -18, /**< Too many entries */
84 AVAHI_ERR_OS = -19, /**< OS error */
85 AVAHI_ERR_ACCESS_DENIED = -20, /**< Access denied */
89 /** States of a server object */
91 AVAHI_SERVER_INVALID = -1, /**< Invalid state (initial) */
92 AVAHI_SERVER_REGISTERING = 0, /**< Host RRs are being registered */
93 AVAHI_SERVER_RUNNING, /**< All host RRs have been established */
94 AVAHI_SERVER_COLLISION /**< There is a collision with a host RR. All host RRs have been withdrawn, the user should set a new host name via avahi_server_set_host_name() */
97 /** Flags for server entries */
99 AVAHI_ENTRY_NULL = 0, /**< No special flags */
100 AVAHI_ENTRY_UNIQUE = 1, /**< The RRset is intended to be unique */
101 AVAHI_ENTRY_NOPROBE = 2, /**< Though the RRset is intended to be unique no probes shall be sent */
102 AVAHI_ENTRY_NOANNOUNCE = 4, /**< Do not announce this RR to other hosts */
103 AVAHI_ENTRY_ALLOWMUTIPLE = 8 /**< Allow multiple local records of this type, even if they are intended to be unique */
106 /** States of an entry group object */
108 AVAHI_ENTRY_GROUP_UNCOMMITED = -1, /**< The group has not yet been commited, the user must still call avahi_entry_group_commit() */
109 AVAHI_ENTRY_GROUP_REGISTERING = 0, /**< The entries of the group are currently being registered */
110 AVAHI_ENTRY_GROUP_ESTABLISHED, /**< The entries have successfully been established */
111 AVAHI_ENTRY_GROUP_COLLISION /**< A name collision for one of the entries in the group has been detected, the entries have been withdrawn */
112 } AvahiEntryGroupState;
114 /** Prototype for callback functions which are called whenever the state of an AvahiServer object changes */
115 typedef void (*AvahiServerCallback) (AvahiServer *s, AvahiServerState state, gpointer userdata);
117 /** Prototype for callback functions which are called whenever the state of an AvahiEntryGroup object changes */
118 typedef void (*AvahiEntryGroupCallback) (AvahiServer *s, AvahiEntryGroup *g, AvahiEntryGroupState state, gpointer userdata);
120 /** Stores configuration options for a server instance */
121 typedef struct AvahiServerConfig {
122 gchar *host_name; /**< Default host name. If left empty defaults to the result of gethostname(2) of the libc */
123 gchar *domain_name; /**< Default domain name. If left empty defaults to .local */
124 gboolean use_ipv4; /**< Enable IPv4 support */
125 gboolean use_ipv6; /**< Enable IPv6 support */
126 gboolean publish_hinfo; /**< Register a HINFO record for the host containing the local OS and CPU type */
127 gboolean publish_addresses; /**< Register A, AAAA and PTR records for all local IP addresses */
128 gboolean publish_workstation; /**< Register a _workstation._tcp service */
129 gboolean publish_domain; /**< Announce the local domain for browsing */
130 gboolean check_response_ttl; /**< If enabled the server ignores all incoming responses with IP TTL != 255. Newer versions of the RFC do no longer contain this check, so it is disabled by default. */
131 gboolean use_iff_running; /**< Require IFF_RUNNING on local network interfaces. This is the official way to check for link beat. Unfortunately this doesn't work with all drivers. So bettere leave this off. */
132 gboolean enable_reflector; /**< Reflect incoming mDNS traffic to all local networks. This allows mDNS based network browsing beyond ethernet borders */
133 gboolean reflect_ipv; /**< if enable_reflector is TRUE, enable/disable reflecting between IPv4 and IPv6 */
136 /** Allocate a new mDNS responder object. */
137 AvahiServer *avahi_server_new(
138 GMainContext *c, /**< The GLIB main loop context to attach to */
139 const AvahiServerConfig *sc, /**< If non-NULL a pointer to a configuration structure for the server. The server makes an internal deep copy of this structure, so you may free it using avahi_server_config_done() immediately after calling this function. */
140 AvahiServerCallback callback, /**< A callback which is called whenever the state of the server changes */
141 gpointer userdata, /**< An opaque pointer which is passed to the callback function */
144 /** Free an mDNS responder object */
145 void avahi_server_free(AvahiServer* s);
147 /** Fill in default values for a server configuration structure. If you
148 * make use of an AvahiServerConfig structure be sure to initialize
149 * it with this function for the sake of upwards library
150 * compatibility. This call may allocate strings on the heap. To
151 * release this memory make sure to call
152 * avahi_server_config_done(). If you want to replace any strings in
153 * the structure be sure to free the strings filled in by this
154 * function with g_free() first and allocate the replacements with
155 * g_malloc() (or g_strdup()).*/
156 AvahiServerConfig* avahi_server_config_init(
157 AvahiServerConfig *c /**< A structure which shall be filled in */ );
159 /** Make a deep copy of the configuration structure *c to *ret. */
160 AvahiServerConfig* avahi_server_config_copy(
161 AvahiServerConfig *ret /**< destination */,
162 const AvahiServerConfig *c /**< source */);
164 /** Free the data in a server configuration structure. */
165 void avahi_server_config_free(AvahiServerConfig *c);
167 /** Return the currently chosen domain name of the server object. The
168 * return value points to an internally allocated string. Be sure to
169 * make a copy of the string before calling any other library
171 const gchar* avahi_server_get_domain_name(AvahiServer *s);
173 /** Return the currently chosen host name. The return value points to a internally allocated string. */
174 const gchar* avahi_server_get_host_name(AvahiServer *s);
176 /** Return the currently chosen host name as a FQDN ("fully qualified
177 * domain name", i.e. the concatenation of the host and domain
178 * name). The return value points to a internally allocated string. */
179 const gchar* avahi_server_get_host_name_fqdn(AvahiServer *s);
181 /** Change the host name of a running mDNS responder. This will drop
182 all automicatilly generated RRs and readd them with the new
183 name. Since the responder has to probe for the new RRs this function
184 takes some time to take effect altough it returns immediately. This
185 function is intended to be called when a host name conflict is
186 reported using AvahiServerCallback. The caller should readd all user
187 defined RRs too since they otherwise continue to point to the outdated
189 gint avahi_server_set_host_name(AvahiServer *s, const gchar *host_name);
191 /** Change the domain name of a running mDNS responder. The same rules
192 * as with avahi_server_set_host_name() apply. */
193 gint avahi_server_set_domain_name(AvahiServer *s, const gchar *domain_name);
195 /** Return the opaque user data pointer attached to a server object */
196 gpointer avahi_server_get_data(AvahiServer *s);
198 /** Change the opaque user data pointer attached to a server object */
199 void avahi_server_set_data(AvahiServer *s, gpointer userdata);
201 /** Return the current state of the server object */
202 AvahiServerState avahi_server_get_state(AvahiServer *s);
204 /** Iterate through all local entries of the server. (when g is NULL)
205 * or of a specified entry group. At the first call state should point
206 * to a NULL initialized void pointer, That pointer is used to track
207 * the current iteration. It is not safe to call any other
208 * avahi_server_xxx() function during the iteration. If the last entry
209 * has been read, NULL is returned. */
210 const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiEntryGroup *g, void **state);
212 /** Callback prototype for avahi_server_dump() */
213 typedef void (*AvahiDumpCallback)(const gchar *text, gpointer userdata);
215 /** Dump the current server status by calling "callback" for each line. */
216 void avahi_server_dump(AvahiServer *s, AvahiDumpCallback callback, gpointer userdata);
218 /** Create a new entry group. The specified callback function is
219 * called whenever the state of the group changes. Use entry group
220 * objects to keep track of you RRs. Add new RRs to a group using
221 * avahi_server_add_xxx(). Make sure to call avahi_entry_group_commit()
222 * to start the registration process for your RRs */
223 AvahiEntryGroup *avahi_entry_group_new(AvahiServer *s, AvahiEntryGroupCallback callback, gpointer userdata);
225 /** Free an entry group. All RRs assigned to the group are removed from the server */
226 void avahi_entry_group_free(AvahiEntryGroup *g);
228 /** Commit an entry group. This starts the probing and registration process for all RRs in the group */
229 gint avahi_entry_group_commit(AvahiEntryGroup *g);
231 /** Remove all entries from the entry group and reset the state to AVAHI_ENTRY_GROUP_UNCOMMITED. */
232 void avahi_entry_group_reset(AvahiEntryGroup *g);
234 /** Return TRUE if the entry group is empty, i.e. has no records attached. */
235 gboolean avahi_entry_group_is_empty(AvahiEntryGroup *g);
237 /** Return the current state of the specified entry group */
238 AvahiEntryGroupState avahi_entry_group_get_state(AvahiEntryGroup *g);
240 /** Change the opaque user data pointer attached to an entry group object */
241 void avahi_entry_group_set_data(AvahiEntryGroup *g, gpointer userdata);
243 /** Return the opaque user data pointer currently set for the entry group object */
244 gpointer avahi_entry_group_get_data(AvahiEntryGroup *g);
246 /** Add a new resource record to the server. Returns 0 on success, negative otherwise. */
247 gint avahi_server_add(
248 AvahiServer *s, /**< The server object to add this record to */
249 AvahiEntryGroup *g, /**< An entry group object if this new record shall be attached to one, or NULL. If you plan to remove the record sometime later you a required to pass an entry group object here. */
250 AvahiIfIndex interface, /**< A numeric index of a network interface to attach this record to, or AVAHI_IF_UNSPEC to attach this record to all interfaces */
251 AvahiProtocol protocol, /**< A protocol family to attach this record to. One of the AVAHI_PROTO_xxx constants. Use AVAHI_PROTO_UNSPEC to make this record available on all protocols (wich means on both IPv4 and IPv6). */
252 AvahiEntryFlags flags, /**< Special flags for this record */
253 AvahiRecord *r /**< The record to add. This function increases the reference counter of this object. */ );
255 /** Add a PTR RR to the server. See avahi_server_add() for more information. */
256 gint avahi_server_add_ptr(
259 AvahiIfIndex interface,
260 AvahiProtocol protocol,
261 AvahiEntryFlags flags,
262 guint32 ttl, /**< DNS TTL for this record */
263 const gchar *name, /**< PTR record name */
264 const gchar *dest /**< pointer destination */ );
266 /** Add a PTR RR to the server. See avahi_server_add() for more information. */
267 gint avahi_server_add_txt(
270 AvahiIfIndex interface,
271 AvahiProtocol protocol,
272 AvahiEntryFlags flags,
273 guint32 ttl, /**< DNS TTL for this record */
274 const gchar *name, /**< TXT record name */
275 ... /**< Text record data, terminated by NULL */);
277 /** Add a PTR RR to the server. Mostly identical to
278 * avahi_server_add_text but takes a va_list instead of a variable
279 * number of arguments */
280 gint avahi_server_add_txt_va(
283 AvahiIfIndex interface,
284 AvahiProtocol protocol,
285 AvahiEntryFlags flags,
290 /** Add a PTR RR to the server. Mostly identical to
291 * avahi_server_add_text but takes an AvahiStringList record instead of a variable
292 * number of arguments. */
293 gint avahi_server_add_txt_strlst(
296 AvahiIfIndex interface,
297 AvahiProtocol protocol,
298 AvahiEntryFlags flags,
301 AvahiStringList *strlst /**< TXT decord data as a AvahiString. This routine makes a deep copy of this object. */ );
303 /** Add an IP address mapping to the server. This will add both the
304 * host-name-to-address and the reverse mapping to the server. See
305 * avahi_server_add() for more information. If adding one of the RRs
306 * fails, the function returns with an error, but it is not defined if
307 * the other RR is deleted from the server or not. Therefore, you have
308 * to free the AvahiEntryGroup and create a new one before
310 gint avahi_server_add_address(
313 AvahiIfIndex interface,
314 AvahiProtocol protocol,
315 AvahiEntryFlags flags,
319 /** Add an DNS-SD service to the Server. This will add all required
320 * RRs to the server. See avahi_server_add() for more information. If
321 * adding one of the RRs fails, the function returns with an error,
322 * but it is not defined if the other RR is deleted from the server or
323 * not. Therefore, you have to free the AvahiEntryGroup and create a
324 * new one before proceeding. */
325 gint avahi_server_add_service(
328 AvahiIfIndex interface,
329 AvahiProtocol protocol,
330 const gchar *name, /**< Service name, e.g. "Lennart's Files" */
331 const gchar *type, /**< DNS-SD type, e.g. "_http._tcp" */
333 const gchar *host, /**< Host name where this servcie resides, or NULL if on the local host */
334 guint16 port, /**< Port number of the service */
335 ... /**< Text records, terminated by NULL */);
337 /** Mostly identical to avahi_server_add_service(), but takes an va_list for the TXT records. */
338 gint avahi_server_add_service_va(
341 AvahiIfIndex interface,
342 AvahiProtocol protocol,
350 /** Mostly identical to avahi_server_add_service(), but takes an AvahiStringList object for the TXT records. The AvahiStringList object is copied. */
351 gint avahi_server_add_service_strlst(
354 AvahiIfIndex interface,
355 AvahiProtocol protocol,
361 AvahiStringList *strlst);
363 /** The type of DNS server */
365 AVAHI_DNS_SERVER_RESOLVE, /**< Unicast DNS servers for normal resolves (_domain._udp)*/
366 AVAHI_DNS_SERVER_UPDATE /**< Unicast DNS servers for updates (_dns-update._udp)*/
367 } AvahiDNSServerType;
369 /** Publish the specified unicast DNS server address via mDNS. You may
370 * browse for records create this way wit
371 * avahi_dns_server_browser_new(). */
372 gint avahi_server_add_dns_server_address(
375 AvahiIfIndex interface,
376 AvahiProtocol protocol,
378 AvahiDNSServerType type,
379 const AvahiAddress *address,
380 guint16 port /** should be 53 */);
382 /** Similar to avahi_server_add_dns_server_address(), but specify a
383 host name instead of an address. The specified host name should be
384 resolvable via mDNS */
385 gint avahi_server_add_dns_server_name(
388 AvahiIfIndex interface,
389 AvahiProtocol protocol,
391 AvahiDNSServerType type,
393 guint16 port /** should be 53 */);
395 /** Type of callback event when browsing */
397 AVAHI_BROWSER_NEW = 0, /**< The object is new on the network */
398 AVAHI_BROWSER_REMOVE = -1 /**< The object has been removed from the network */
401 /** Type of callback event when resolving */
403 AVAHI_RESOLVER_FOUND = 0, /**< RR found, resolving successful */
404 AVAHI_RESOLVER_TIMEOUT = -1 /**< Noone responded within the timeout, resolving failed */
405 } AvahiResolverEvent;
407 /** A browsing object for arbitrary RRs */
408 typedef struct AvahiRecordBrowser AvahiRecordBrowser;
410 /** Callback prototype for AvahiRecordBrowser events */
411 typedef void (*AvahiRecordBrowserCallback)(
412 AvahiRecordBrowser *b, /**< The AvahiRecordBrowser object that is emitting this callback */
413 AvahiIfIndex interface, /**< Logical OS network interface number the record was found on */
414 AvahiProtocol protocol, /**< Protocol number the record was found. */
415 AvahiBrowserEvent event, /**< Browsing event, either AVAHI_BROWSER_NEW or AVAHI_BROWSER_REMOVE */
416 AvahiRecord *record, /**< The record that was found */
417 gpointer userdata /**< Arbitrary user data passed to avahi_record_browser_new() */ );
419 /** Create a new browsing object for arbitrary RRs */
420 AvahiRecordBrowser *avahi_record_browser_new(
421 AvahiServer *server, /**< The server object to which attach this query */
422 AvahiIfIndex interface, /**< Logical OS interface number where to look for the records, or AVAHI_IF_UNSPEC to look on interfaces */
423 AvahiProtocol protocol, /**< Protocol number to use when looking for the record, or AVAHI_PROTO_UNSPEC to look on all protocols */
424 AvahiKey *key, /**< The search key */
425 AvahiRecordBrowserCallback callback, /**< The callback to call on browsing events */
426 gpointer userdata /**< Arbitrary use suppliable data which is passed to the callback */);
428 /** Free an AvahiRecordBrowser object */
429 void avahi_record_browser_free(AvahiRecordBrowser *b);
431 /** A host name to IP adddress resolver object */
432 typedef struct AvahiHostNameResolver AvahiHostNameResolver;
434 /** Callback prototype for AvahiHostNameResolver events */
435 typedef void (*AvahiHostNameResolverCallback)(
436 AvahiHostNameResolver *r,
437 AvahiIfIndex interface,
438 AvahiProtocol protocol,
439 AvahiResolverEvent event, /**< Resolving event */
440 const gchar *host_name, /**< Host name which should be resolved. May differ in case from the query */
441 const AvahiAddress *a, /**< The address, or NULL if the host name couldn't be resolved. */
444 /** Create an AvahiHostNameResolver object for resolving a host name to an adddress. See AvahiRecordBrowser for more info on the paramters. */
445 AvahiHostNameResolver *avahi_host_name_resolver_new(
447 AvahiIfIndex interface,
448 AvahiProtocol protocol,
449 const gchar *host_name, /**< The host name to look for */
450 AvahiProtocol aprotocol, /**< The address family of the desired address or AVAHI_PROTO_UNSPEC if doesn't matter. */
451 AvahiHostNameResolverCallback calback,
454 /** Free a AvahiHostNameResolver object */
455 void avahi_host_name_resolver_free(AvahiHostNameResolver *r);
457 /** An IP address to host name resolver object ("reverse lookup") */
458 typedef struct AvahiAddressResolver AvahiAddressResolver;
460 /** Callback prototype for AvahiAddressResolver events */
461 typedef void (*AvahiAddressResolverCallback)(
462 AvahiAddressResolver *r,
463 AvahiIfIndex interface,
464 AvahiProtocol protocol,
465 AvahiResolverEvent event,
466 const AvahiAddress *a,
467 const gchar *host_name, /**< A host name for the specified address, if one was found, i.e. event == AVAHI_RESOLVER_FOUND */
470 /** Create an AvahiAddressResolver object. See AvahiRecordBrowser for more info on the paramters. */
471 AvahiAddressResolver *avahi_address_resolver_new(
473 AvahiIfIndex interface,
474 AvahiProtocol protocol,
475 const AvahiAddress *address,
476 AvahiAddressResolverCallback calback,
479 /** Free an AvahiAddressResolver object */
480 void avahi_address_resolver_free(AvahiAddressResolver *r);
482 /** The type of domain to browse for */
484 AVAHI_DOMAIN_BROWSER_REGISTER, /**< Browse for a list of available registering domains */
485 AVAHI_DOMAIN_BROWSER_REGISTER_DEFAULT, /**< Browse for the default registering domain */
486 AVAHI_DOMAIN_BROWSER_BROWSE, /**< Browse for a list of available browsing domains */
487 AVAHI_DOMAIN_BROWSER_BROWSE_DEFAULT, /**< Browse for the default browsing domain */
488 AVAHI_DOMAIN_BROWSER_BROWSE_LEGACY, /**< Legacy browse domain - see DNS-SD spec for more information */
489 AVAHI_DOMAIN_BROWSER_MAX
490 } AvahiDomainBrowserType;
492 /** A local domain browsing object. May be used to enumerate domains used on the local LAN */
493 typedef struct AvahiDomainBrowser AvahiDomainBrowser;
495 /** Callback prototype for AvahiDomainBrowser events */
496 typedef void (*AvahiDomainBrowserCallback)(
497 AvahiDomainBrowser *b,
498 AvahiIfIndex interface,
499 AvahiProtocol protocol,
500 AvahiBrowserEvent event,
504 /** Create a new AvahiDomainBrowser object */
505 AvahiDomainBrowser *avahi_domain_browser_new(
507 AvahiIfIndex interface,
508 AvahiProtocol protocol,
510 AvahiDomainBrowserType type,
511 AvahiDomainBrowserCallback callback,
514 /** Free an AvahiDomainBrowser object */
515 void avahi_domain_browser_free(AvahiDomainBrowser *b);
517 /** A DNS-SD service type browsing object. May be used to enumerate the service types of all available services on the local LAN */
518 typedef struct AvahiServiceTypeBrowser AvahiServiceTypeBrowser;
520 /** Callback prototype for AvahiServiceTypeBrowser events */
521 typedef void (*AvahiServiceTypeBrowserCallback)(
522 AvahiServiceTypeBrowser *b,
523 AvahiIfIndex interface,
524 AvahiProtocol protocol,
525 AvahiBrowserEvent event,
530 /** Create a new AvahiServiceTypeBrowser object. */
531 AvahiServiceTypeBrowser *avahi_service_type_browser_new(
533 AvahiIfIndex interface,
534 AvahiProtocol protocol,
536 AvahiServiceTypeBrowserCallback callback,
539 /** Free an AvahiServiceTypeBrowser object */
540 void avahi_service_type_browser_free(AvahiServiceTypeBrowser *b);
542 /** A DNS-SD service browser. Use this to enumerate available services of a certain kind on the local LAN. Use AvahiServiceResolver to get specific service data like address and port for a service. */
543 typedef struct AvahiServiceBrowser AvahiServiceBrowser;
545 /** Callback prototype for AvahiServiceBrowser events */
546 typedef void (*AvahiServiceBrowserCallback)(
547 AvahiServiceBrowser *b,
548 AvahiIfIndex interface,
549 AvahiProtocol protocol,
550 AvahiBrowserEvent event,
551 const gchar *name /**< Service name, e.g. "Lennart's Files" */,
552 const gchar *type /**< DNS-SD type, e.g. "_http._tcp" */,
553 const gchar *domain /**< Domain of this service, e.g. "local" */,
556 /** Create a new AvahiServiceBrowser object. */
557 AvahiServiceBrowser *avahi_service_browser_new(
559 AvahiIfIndex interface,
560 AvahiProtocol protocol,
561 const gchar *service_type /** DNS-SD service type, e.g. "_http._tcp" */,
563 AvahiServiceBrowserCallback callback,
566 /** Free an AvahiServiceBrowser object */
567 void avahi_service_browser_free(AvahiServiceBrowser *b);
569 /** A DNS-SD service resolver. Use this to retrieve addres, port and TXT data for a DNS-SD service */
570 typedef struct AvahiServiceResolver AvahiServiceResolver;
572 /** Callback prototype for AvahiServiceResolver events */
573 typedef void (*AvahiServiceResolverCallback)(
574 AvahiServiceResolver *r,
575 AvahiIfIndex interface,
576 AvahiProtocol protocol,
577 AvahiResolverEvent event,
578 const gchar *name, /**< Service name */
579 const gchar *type, /**< Service Type */
581 const gchar *host_name, /**< Host name of the service */
582 const AvahiAddress *a, /**< The resolved host name */
583 guint16 port, /**< Service name */
584 AvahiStringList *txt, /**< TXT record data */
587 /** Create a new AvahiServiceResolver object */
588 AvahiServiceResolver *avahi_service_resolver_new(
590 AvahiIfIndex interface,
591 AvahiProtocol protocol,
595 AvahiProtocol aprotocol, /**< Address family of the desired service address. Use AVAHI_PROTO_UNSPEC if you don't care */
596 AvahiServiceResolverCallback calback,
599 /** Free an AvahiServiceResolver object */
600 void avahi_service_resolver_free(AvahiServiceResolver *r);
602 /** A domain service browser object. Use this to browse for
603 * conventional unicast DNS servers which may be used to resolve
604 * conventional domain names */
605 typedef struct AvahiDNSServerBrowser AvahiDNSServerBrowser;
607 /** Callback prototype for AvahiDNSServerBrowser events */
608 typedef void (*AvahiDNSServerBrowserCallback)(
609 AvahiDNSServerBrowser *b,
610 AvahiIfIndex interface,
611 AvahiProtocol protocol,
612 AvahiBrowserEvent event,
613 const gchar *host_name, /**< Host name of the DNS server, probably useless */
614 const AvahiAddress *a, /**< Address of the DNS server */
615 guint16 port, /**< Port number of the DNS servers, probably 53 */
618 /** Create a new AvahiDNSServerBrowser object */
619 AvahiDNSServerBrowser *avahi_dns_server_browser_new(
621 AvahiIfIndex interface,
622 AvahiProtocol protocol,
624 AvahiDNSServerType type,
625 AvahiProtocol aprotocol, /**< Address protocol for the DNS server */
626 AvahiDNSServerBrowserCallback callback,
629 /** Free an AvahiDNSServerBrowser object */
630 void avahi_dns_server_browser_free(AvahiDNSServerBrowser *b);
632 /** Return a human readable error string for the specified error code */
633 const gchar *avahi_strerror(gint error);
635 /** Return the last error code */
636 gint avahi_server_errno(AvahiServer *s);
638 #ifndef DOXYGEN_SHOULD_SKIP_THIS