1/***
2  This file is part of avahi.
3
4  avahi is free software; you can redistribute it and/or modify it
5  under the terms of the GNU Lesser General Public License as
6  published by the Free Software Foundation; either version 2.1 of the
7  License, or (at your option) any later version.
8
9  avahi is distributed in the hope that it will be useful, but WITHOUT
10  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
11  or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
12  Public License for more details.
13
14  You should have received a copy of the GNU Lesser General Public
15  License along with avahi; if not, write to the Free Software
16  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
17  USA.
18***/
19
20#ifdef HAVE_CONFIG_H
21#include <config.h>
22#endif
23
24#include <glib.h>
25
26#include <avahi-client/client.h>
27#include <avahi-common/error.h>
28#include <avahi-common/timeval.h>
29#include <avahi-glib/glib-watch.h>
30#include <avahi-glib/glib-malloc.h>
31
32/* Callback for Avahi API Timeout Event */
33static void
34avahi_timeout_event (AVAHI_GCC_UNUSED AvahiTimeout *timeout, AVAHI_GCC_UNUSED void *userdata)
35{
36    g_message ("Avahi API Timeout reached!");
37}
38
39/* Callback for GLIB API Timeout Event */
40static gboolean
41avahi_timeout_event_glib (void *userdata)
42{
43    GMainLoop *loop = userdata;
44
45    g_message ("GLIB API Timeout reached, quitting main loop!");
46
47    /* Quit the application */
48    g_main_loop_quit (loop);
49
50    return FALSE; /* Don't re-schedule timeout event */
51}
52
53/* Callback for state changes on the Client */
54static void
55avahi_client_callback (AVAHI_GCC_UNUSED AvahiClient *client, AvahiClientState state, void *userdata)
56{
57    GMainLoop *loop = userdata;
58
59    g_message ("Avahi Client State Change: %d", state);
60
61    if (state == AVAHI_CLIENT_FAILURE)
62    {
63        /* We we're disconnected from the Daemon */
64        g_message ("Disconnected from the Avahi Daemon: %s", avahi_strerror(avahi_client_errno(client)));
65
66        /* Quit the application */
67        g_main_loop_quit (loop);
68    }
69}
70
71int
72main (AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char *argv[])
73{
74    GMainLoop *loop = NULL;
75    const AvahiPoll *poll_api;
76    AvahiGLibPoll *glib_poll;
77    AvahiClient *client;
78    struct timeval tv;
79    const char *version;
80    int error;
81
82    /* Optional: Tell avahi to use g_malloc and g_free */
83    avahi_set_allocator (avahi_glib_allocator ());
84
85    /* Create the GLIB main loop */
86    loop = g_main_loop_new (NULL, FALSE);
87
88    /* Create the GLIB Adaptor */
89    glib_poll = avahi_glib_poll_new (NULL, G_PRIORITY_DEFAULT);
90    poll_api = avahi_glib_poll_get (glib_poll);
91
92    /* Example, schedule a timeout event with the Avahi API */
93    avahi_elapse_time (&tv,                         /* timeval structure */
94            1000,                                   /* 1 second */
95            0);                                     /* "jitter" - Random additional delay from 0 to this value */
96
97    poll_api->timeout_new (poll_api,                /* The AvahiPoll object */
98                      &tv,                          /* struct timeval indicating when to go activate */
99                      avahi_timeout_event,          /* Pointer to function to call */
100                      NULL);                        /* User data to pass to function */
101
102    /* Schedule a timeout event with the glib api */
103    g_timeout_add (5000,                            /* 5 seconds */
104            avahi_timeout_event_glib,               /* Pointer to function callback */
105            loop);                                  /* User data to pass to function */
106
107    /* Create a new AvahiClient instance */
108    client = avahi_client_new (poll_api,            /* AvahiPoll object from above */
109                               0,
110            avahi_client_callback,                  /* Callback function for Client state changes */
111            loop,                                   /* User data */
112            &error);                                /* Error return */
113
114    /* Check the error return code */
115    if (client == NULL)
116    {
117        /* Print out the error string */
118        g_warning ("Error initializing Avahi: %s", avahi_strerror (error));
119
120        goto fail;
121    }
122
123    /* Make a call to get the version string from the daemon */
124    version = avahi_client_get_version_string (client);
125
126    /* Check if the call suceeded */
127    if (version == NULL)
128    {
129        g_warning ("Error getting version string: %s", avahi_strerror (avahi_client_errno (client)));
130
131        goto fail;
132    }
133
134    g_message ("Avahi Server Version: %s", version);
135
136    /* Start the GLIB Main Loop */
137    g_main_loop_run (loop);
138
139fail:
140    /* Clean up */
141    g_main_loop_unref (loop);
142    avahi_client_free (client);
143    avahi_glib_poll_free (glib_poll);
144
145    return 0;
146}
147