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/* $Id$ */
/***
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.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <avahi-client/client.h>
#include <avahi-common/alternative.h>
#include <avahi-common/simple-watch.h>
#include <avahi-common/malloc.h>
#include <avahi-common/error.h>
static AvahiEntryGroup *group = NULL;
static AvahiSimplePoll *simple_poll = NULL;
static char *name = NULL;
static void create_services(AvahiClient *c);
static void entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
assert(g == group);
/* Called whenever the entry group state changes */
if (state == AVAHI_ENTRY_GROUP_ESTABLISHED)
/* The entry group has been established successfully */
fprintf(stderr, "Service '%s' successfully established.\n", name);
else if (state == AVAHI_ENTRY_GROUP_COLLISION) {
char *n;
/* A service name collision happened. Let's pick a new name */
n = avahi_alternative_service_name(name);
avahi_free(name);
name = n;
fprintf(stderr, "Service name collision, renaming service to '%s'\n", name);
/* And recreate the services */
create_services(avahi_entry_group_get_client(g));
}
}
static void create_services(AvahiClient *c) {
char r[128];
int ret;
assert(c);
/* If this is the first time we're called, let's create a new entry group */
if (!group) {
if (!(group = avahi_entry_group_new(c, entry_group_callback, NULL))) {
fprintf(stderr, "avahi_entry_group_new() failed: %s\n", avahi_strerror(avahi_client_errno(c)));
goto fail;
}
}
fprintf(stderr, "Adding service '%s'\n", name);
/* Create some random TXT data */
snprintf(r, sizeof(r), "random=%i", rand());
/* Add the service for IPP */
if ((ret = avahi_entry_group_add_service(group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, "_ipp._tcp", NULL, NULL, 651, "test=blah", r, NULL)) < 0) {
fprintf(stderr, "Failed to add _ipp._tcp service: %s\n", avahi_strerror(ret));
goto fail;
}
/* Add the same service for BSD LPR */
if ((ret = avahi_entry_group_add_service(group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, "_printer._tcp", NULL, NULL, 515, NULL)) < 0) {
fprintf(stderr, "Failed to add _printer._tcp service: %s\n", avahi_strerror(ret));
goto fail;
}
/* Add an additional (hypothetic) subtype */
if ((ret = avahi_entry_group_add_service_subtype(group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, "_printer._tcp", NULL, "_magic._sub._printer._tcp") < 0)) {
fprintf(stderr, "Failed to add subtype _magic._sub._printer._tcp: %s\n", avahi_strerror(ret));
goto fail;
}
/* Tell the server to register the service */
if ((ret = avahi_entry_group_commit(group)) < 0) {
fprintf(stderr, "Failed to commit entry_group: %s\n", avahi_strerror(ret));
goto fail;
}
return;
fail:
avahi_simple_poll_quit(simple_poll);
return;
}
static void client_callback(AvahiClient *c, AvahiClientState state, void * userdata) {
assert(c);
/* Called whenever the client or server state changes */
if (state == AVAHI_CLIENT_S_RUNNING)
/* The serve has startup successfully and registered its host
* name on the network, so it's time to create our services */
create_services(c);
else if (state == AVAHI_CLIENT_S_COLLISION) {
/* Let's drop our registered services. When the server is back
* in AVAHI_SERVER_RUNNING state we will register them
* again with the new host name. */
if (group)
avahi_entry_group_reset(group);
} else if (state == AVAHI_CLIENT_DISCONNECTED) {
fprintf(stderr, "Server connection terminated.\n");
avahi_simple_poll_quit(simple_poll);
}
}
int main(int argc, char*argv[]) {
AvahiClient *client = NULL;
int error;
int ret = 1;
/* Allocate main loop object */
if (!(simple_poll = avahi_simple_poll_new())) {
fprintf(stderr, "Failed to create simple poll object.\n");
goto fail;
}
name = avahi_strdup("MegaPrinter");
/* Allocate a new client */
client = avahi_client_new(avahi_simple_poll_get(simple_poll), client_callback, NULL, &error);
/* Check wether creating the client object succeeded */
if (!client) {
fprintf(stderr, "Failed to create client: %s\n", avahi_strerror(error));
goto fail;
}
/* Run the main loop */
for (;;)
if (avahi_simple_poll_iterate(simple_poll, -1) != 0)
break;
ret = 0;
fail:
/* Cleanup things */
if (group)
avahi_entry_group_free(group);
if (client)
avahi_client_free(client);
if (simple_poll)
avahi_simple_poll_free(simple_poll);
avahi_free(name);
return ret;
}
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