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publish.h

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#ifndef foopublishhfoo
#define foopublishhfoo

/***
  This file is part of avahi.

  avahi is free software; you can redistribute it and/or modify it
  under the terms of the GNU Lesser General Public License as
  published by the Free Software Foundation; either version 2.1 of the
  License, or (at your option) any later version.

  avahi is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
  Public License for more details.

  You should have received a copy of the GNU Lesser General Public
  License along with avahi; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

/** \file core/publish.h Functions for publising local services and RRs */

/** \example core-publish-service.c Example how to register a DNS-SD
 * service using an embedded mDNS stack. It behaves like a network
 * printer registering both an IPP and a BSD LPR service. */

/** A group of locally registered DNS RRs */
00030 typedef struct AvahiSEntryGroup AvahiSEntryGroup;

#include <avahi-common/cdecl.h>
#include <avahi-core/core.h>

AVAHI_C_DECL_BEGIN

/** Prototype for callback functions which are called whenever the state of an AvahiSEntryGroup object changes */
00038 typedef void (*AvahiSEntryGroupCallback) (AvahiServer *s, AvahiSEntryGroup *g, AvahiEntryGroupState state, void* userdata);

/** Iterate through all local entries of the server. (when g is NULL)
 * or of a specified entry group. At the first call state should point
 * to a NULL initialized void pointer, That pointer is used to track
 * the current iteration. It is not safe to call any other
 * avahi_server_xxx() function during the iteration. If the last entry
 * has been read, NULL is returned. */
const AvahiRecord *avahi_server_iterate(AvahiServer *s, AvahiSEntryGroup *g, void **state);

/** Create a new entry group. The specified callback function is
 * called whenever the state of the group changes. Use entry group
 * objects to keep track of you RRs. Add new RRs to a group using
 * avahi_server_add_xxx(). Make sure to call avahi_s_entry_group_commit()
 * to start the registration process for your RRs */
AvahiSEntryGroup *avahi_s_entry_group_new(AvahiServer *s, AvahiSEntryGroupCallback callback, void* userdata);

/** Free an entry group. All RRs assigned to the group are removed from the server */
void avahi_s_entry_group_free(AvahiSEntryGroup *g);

/** Commit an entry group. This starts the probing and registration process for all RRs in the group */
int avahi_s_entry_group_commit(AvahiSEntryGroup *g);

/** Remove all entries from the entry group and reset the state to AVAHI_ENTRY_GROUP_UNCOMMITED. */
void avahi_s_entry_group_reset(AvahiSEntryGroup *g);

/** Return 1 if the entry group is empty, i.e. has no records attached. */
int avahi_s_entry_group_is_empty(AvahiSEntryGroup *g);

/** Return the current state of the specified entry group */
AvahiEntryGroupState avahi_s_entry_group_get_state(AvahiSEntryGroup *g);

/** Change the opaque user data pointer attached to an entry group object */
void avahi_s_entry_group_set_data(AvahiSEntryGroup *g, void* userdata);

/** Return the opaque user data pointer currently set for the entry group object */
void* avahi_s_entry_group_get_data(AvahiSEntryGroup *g);

/** Add a new resource record to the server. Returns 0 on success, negative otherwise. */
int avahi_server_add(
    AvahiServer *s,           /**< The server object to add this record to */
    AvahiSEntryGroup *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. */
    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 */
    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). */
    AvahiPublishFlags flags,    /**< Special flags for this record */
    AvahiRecord *r            /**< The record to add. This function increases the reference counter of this object. */);

/** Add an IP address mapping to the server. This will add both the
 * host-name-to-address and the reverse mapping to the server. See
 * avahi_server_add() for more information. If adding one of the RRs
 * fails, the function returns with an error, but it is not defined if
 * the other RR is deleted from the server or not. Therefore, you have
 * to free the AvahiSEntryGroup and create a new one before
 * proceeding. */
int avahi_server_add_address(
    AvahiServer *s,
    AvahiSEntryGroup *g,
    AvahiIfIndex interface,
    AvahiProtocol protocol,
    AvahiPublishFlags flags,
    const char *name,
    AvahiAddress *a);

/** Add an DNS-SD service to the Server. This will add all required
 * RRs to the server. See avahi_server_add() for more information.  If
 * adding one of the RRs fails, the function returns with an error,
 * but it is not defined if the other RR is deleted from the server or
 * not. Therefore, you have to free the AvahiSEntryGroup and create a
 * new one before proceeding. */
int avahi_server_add_service(
    AvahiServer *s,
    AvahiSEntryGroup *g,
    AvahiIfIndex interface,
    AvahiProtocol protocol,
    AvahiPublishFlags flags,
    const char *name,         /**< Service name, e.g. "Lennart's Files" */
    const char *type,         /**< DNS-SD type, e.g. "_http._tcp" */
    const char *domain,
    const char *host,         /**< Host name where this servcie resides, or NULL if on the local host */
    uint16_t port,              /**< Port number of the service */
    ...  /**< Text records, terminated by NULL */) AVAHI_GCC_SENTINEL;

/** Mostly identical to avahi_server_add_service(), but takes an AvahiStringList object for the TXT records.  The AvahiStringList object is copied. */
int avahi_server_add_service_strlst(
    AvahiServer *s,
    AvahiSEntryGroup *g,
    AvahiIfIndex interface,
    AvahiProtocol protocol,
    AvahiPublishFlags flags,
    const char *name,
    const char *type,
    const char *domain,
    const char *host,
    uint16_t port,
    AvahiStringList *strlst);

/** Add a subtype for an already existing service */
int avahi_server_add_service_subtype(
    AvahiServer *s,
    AvahiSEntryGroup *g,
    AvahiIfIndex interface,
    AvahiProtocol protocol,
    AvahiPublishFlags flags,
    const char *name,         /**< Specify the name of main service you already added here */
    const char *type,         /**< Specify the main type of the service you already added here */
    const char *domain,       /**< Specify the main type of the service you already added here */
    const char *subtype       /**< The new subtype for the specified service */ );

/** Update the TXT record for a service with the data from the specified string list */
int avahi_server_update_service_txt_strlst(
    AvahiServer *s,
    AvahiSEntryGroup *g,
    AvahiIfIndex interface,
    AvahiProtocol protocol,
    AvahiPublishFlags flags,
    const char *name,
    const char *type,
    const char *domain,
    AvahiStringList *strlst);

/** Update the TXT record for a service with the NULL termonate list of strings */
int avahi_server_update_service_txt(
    AvahiServer *s,
    AvahiSEntryGroup *g,
    AvahiIfIndex interface,
    AvahiProtocol protocol,
    AvahiPublishFlags flags,
    const char *name,
    const char *type,
    const char *domain,
    ...) AVAHI_GCC_SENTINEL;

/** Check if there is a service locally defined and return the entry group it is attached to. Returns NULL if the service isn't local*/
int avahi_server_get_group_of_service(AvahiServer *s, AvahiIfIndex interface, AvahiProtocol protocol, const char *name, const char *type, const char *domain, AvahiSEntryGroup** ret_group);

AVAHI_C_DECL_END

#endif

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