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
25 /** \file core.h The Avahi Multicast DNS and DNS Service Discovery implementation. */
28 #include <avahi-common/cdecl.h>
30 #ifndef DOXYGEN_SHOULD_SKIP_THIS
34 /** An mDNS responder object */
35 typedef struct AvahiServer AvahiServer;
37 #ifndef DOXYGEN_SHOULD_SKIP_THIS
41 #include <avahi-core/rr.h>
42 #include <avahi-common/address.h>
43 #include <avahi-common/defs.h>
44 #include <avahi-common/watch.h>
46 #ifndef DOXYGEN_SHOULD_SKIP_THIS
50 /** Maximum number of defined DNS servers for wide area DNS */
51 #define AVAHI_MAX_WIDE_AREA_SERVERS 4
53 /** Flags for server entries */
55 AVAHI_ENTRY_NULL = 0, /**< No special flags */
56 AVAHI_ENTRY_UNIQUE = 1, /**< The RRset is intended to be unique */
57 AVAHI_ENTRY_NOPROBE = 2, /**< Though the RRset is intended to be unique no probes shall be sent */
58 AVAHI_ENTRY_NOANNOUNCE = 4, /**< Do not announce this RR to other hosts */
59 AVAHI_ENTRY_ALLOWMUTIPLE = 8 /**< Allow multiple local records of this type, even if they are intended to be unique */
62 /** Prototype for callback functions which are called whenever the state of an AvahiServer object changes */
63 typedef void (*AvahiServerCallback) (AvahiServer *s, AvahiServerState state, void* userdata);
65 /** Stores configuration options for a server instance */
66 typedef struct AvahiServerConfig {
67 char *host_name; /**< Default host name. If left empty defaults to the result of gethostname(2) of the libc */
68 char *domain_name; /**< Default domain name. If left empty defaults to .local */
69 int use_ipv4; /**< Enable IPv4 support */
70 int use_ipv6; /**< Enable IPv6 support */
71 int publish_hinfo; /**< Register a HINFO record for the host containing the local OS and CPU type */
72 int publish_addresses; /**< Register A, AAAA and PTR records for all local IP addresses */
73 int publish_workstation; /**< Register a _workstation._tcp service */
74 int publish_domain; /**< Announce the local domain for browsing */
75 int 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. */
76 int 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. */
77 int enable_reflector; /**< Reflect incoming mDNS traffic to all local networks. This allows mDNS based network browsing beyond ethernet borders */
78 int reflect_ipv; /**< if enable_reflector is 1, enable/disable reflecting between IPv4 and IPv6 */
79 int add_service_cookie; /**< Add magic service cookie to all locally generated records implicitly */
80 int enable_wide_area; /**< Enable wide area support */
81 AvahiAddress wide_area_servers[AVAHI_MAX_WIDE_AREA_SERVERS]; /** Unicast DNS server to use for wide area lookup */
82 unsigned n_wide_area_servers; /**< Number of servers in wide_area_servers[] */
85 /** Allocate a new mDNS responder object. */
86 AvahiServer *avahi_server_new(
87 const AvahiPoll *api, /**< The main loop adapter */
88 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. */
89 AvahiServerCallback callback, /**< A callback which is called whenever the state of the server changes */
90 void* userdata, /**< An opaque pointer which is passed to the callback function */
93 /** Free an mDNS responder object */
94 void avahi_server_free(AvahiServer* s);
96 /** Fill in default values for a server configuration structure. If you
97 * make use of an AvahiServerConfig structure be sure to initialize
98 * it with this function for the sake of upwards library
99 * compatibility. This call may allocate strings on the heap. To
100 * release this memory make sure to call
101 * avahi_server_config_done(). If you want to replace any strings in
102 * the structure be sure to free the strings filled in by this
103 * function with avahi_free() first and allocate the replacements with
104 * g_malloc() (or g_strdup()).*/
105 AvahiServerConfig* avahi_server_config_init(
106 AvahiServerConfig *c /**< A structure which shall be filled in */ );
108 /** Make a deep copy of the configuration structure *c to *ret. */
109 AvahiServerConfig* avahi_server_config_copy(
110 AvahiServerConfig *ret /**< destination */,
111 const AvahiServerConfig *c /**< source */);
113 /** Free the data in a server configuration structure. */
114 void avahi_server_config_free(AvahiServerConfig *c);
116 /** Return the currently chosen domain name of the server object. The
117 * return value points to an internally allocated string. Be sure to
118 * make a copy of the string before calling any other library
120 const char* avahi_server_get_domain_name(AvahiServer *s);
122 /** Return the currently chosen host name. The return value points to a internally allocated string. */
123 const char* avahi_server_get_host_name(AvahiServer *s);
125 /** Return the currently chosen host name as a FQDN ("fully qualified
126 * domain name", i.e. the concatenation of the host and domain
127 * name). The return value points to a internally allocated string. */
128 const char* avahi_server_get_host_name_fqdn(AvahiServer *s);
130 /** Change the host name of a running mDNS responder. This will drop
131 all automicatilly generated RRs and readd them with the new
132 name. Since the responder has to probe for the new RRs this function
133 takes some time to take effect altough it returns immediately. This
134 function is intended to be called when a host name conflict is
135 reported using AvahiServerCallback. The caller should readd all user
136 defined RRs too since they otherwise continue to point to the outdated
138 int avahi_server_set_host_name(AvahiServer *s, const char *host_name);
140 /** Change the domain name of a running mDNS responder. The same rules
141 * as with avahi_server_set_host_name() apply. */
142 int avahi_server_set_domain_name(AvahiServer *s, const char *domain_name);
144 /** Return the opaque user data pointer attached to a server object */
145 void* avahi_server_get_data(AvahiServer *s);
147 /** Change the opaque user data pointer attached to a server object */
148 void avahi_server_set_data(AvahiServer *s, void* userdata);
150 /** Return the current state of the server object */
151 AvahiServerState avahi_server_get_state(AvahiServer *s);
153 /** Callback prototype for avahi_server_dump() */
154 typedef void (*AvahiDumpCallback)(const char *text, void* userdata);
156 /** Dump the current server status by calling "callback" for each line. */
157 int avahi_server_dump(AvahiServer *s, AvahiDumpCallback callback, void* userdata);
159 /** Return the last error code */
160 int avahi_server_errno(AvahiServer *s);
162 /** Return the local service cookie */
163 uint32_t avahi_server_get_local_service_cookie(AvahiServer *s);
165 /** Return 1 if there is a local service with the specified credentials registeresd. Return 0 if not, negative on failure */
166 int avahi_server_is_service_local(AvahiServer *s, AvahiIfIndex, AvahiProtocol protocol, const char *name, const char *type, const char*domain);
168 /** Set the wide area DNS servers */
169 int avahi_server_set_wide_area_servers(AvahiServer *s, const AvahiAddress *a, unsigned n);
171 #ifndef DOXYGEN_SHOULD_SKIP_THIS