4 This file is part of avahi.
6 avahi is free software; you can redistribute it and/or modify it
7 under the terms of the GNU Lesser General Public License as
8 published by the Free Software Foundation; either version 2.1 of the
9 License, or (at your option) any later version.
11 avahi is distributed in the hope that it will be useful, but WITHOUT
12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
13 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
14 Public License for more details.
16 You should have received a copy of the GNU Lesser General Public
17 License along with avahi; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
31 #include <avahi-client/client.h>
32 #include <avahi-client/publish.h>
34 #include <avahi-common/alternative.h>
35 #include <avahi-common/simple-watch.h>
36 #include <avahi-common/malloc.h>
37 #include <avahi-common/error.h>
39 static AvahiEntryGroup *group = NULL;
40 static AvahiSimplePoll *simple_poll = NULL;
41 static char *name = NULL;
43 static void create_services(AvahiClient *c);
45 static void entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, AVAHI_GCC_UNUSED void *userdata) {
48 /* Called whenever the entry group state changes */
51 case AVAHI_ENTRY_GROUP_ESTABLISHED :
52 /* The entry group has been established successfully */
53 fprintf(stderr, "Service '%s' successfully established.\n", name);
56 case AVAHI_ENTRY_GROUP_COLLISION : {
59 /* A service name collision happened. Let's pick a new name */
60 n = avahi_alternative_service_name(name);
64 fprintf(stderr, "Service name collision, renaming service to '%s'\n", name);
66 /* And recreate the services */
67 create_services(avahi_entry_group_get_client(g));
71 case AVAHI_ENTRY_GROUP_FAILURE :
73 /* Some kind of failure happened while we were registering our services */
74 avahi_simple_poll_quit(simple_poll);
77 case AVAHI_ENTRY_GROUP_UNCOMMITED:
78 case AVAHI_ENTRY_GROUP_REGISTERING:
83 static void create_services(AvahiClient *c) {
88 /* If this is the first time we're called, let's create a new entry group */
90 if (!(group = avahi_entry_group_new(c, entry_group_callback, NULL))) {
91 fprintf(stderr, "avahi_entry_group_new() failed: %s\n", avahi_strerror(avahi_client_errno(c)));
95 fprintf(stderr, "Adding service '%s'\n", name);
97 /* Create some random TXT data */
98 snprintf(r, sizeof(r), "random=%i", rand());
100 /* Add the service for IPP */
101 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) {
102 fprintf(stderr, "Failed to add _ipp._tcp service: %s\n", avahi_strerror(ret));
106 /* Add the same service for BSD LPR */
107 if ((ret = avahi_entry_group_add_service(group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, "_printer._tcp", NULL, NULL, 515, NULL)) < 0) {
108 fprintf(stderr, "Failed to add _printer._tcp service: %s\n", avahi_strerror(ret));
112 /* Add an additional (hypothetic) subtype */
113 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)) {
114 fprintf(stderr, "Failed to add subtype _magic._sub._printer._tcp: %s\n", avahi_strerror(ret));
118 /* Tell the server to register the service */
119 if ((ret = avahi_entry_group_commit(group)) < 0) {
120 fprintf(stderr, "Failed to commit entry_group: %s\n", avahi_strerror(ret));
127 avahi_simple_poll_quit(simple_poll);
130 static void client_callback(AvahiClient *c, AvahiClientState state, AVAHI_GCC_UNUSED void * userdata) {
133 /* Called whenever the client or server state changes */
136 case AVAHI_CLIENT_S_RUNNING:
138 /* The server has startup successfully and registered its host
139 * name on the network, so it's time to create our services */
144 case AVAHI_CLIENT_S_COLLISION:
146 /* Let's drop our registered services. When the server is back
147 * in AVAHI_SERVER_RUNNING state we will register them
148 * again with the new host name. */
150 avahi_entry_group_reset(group);
153 case AVAHI_CLIENT_FAILURE:
155 fprintf(stderr, "Client failure: %s\n", avahi_strerror(avahi_client_errno(c)));
156 avahi_simple_poll_quit(simple_poll);
160 case AVAHI_CLIENT_S_REGISTERING:
165 int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
166 AvahiClient *client = NULL;
170 /* Allocate main loop object */
171 if (!(simple_poll = avahi_simple_poll_new())) {
172 fprintf(stderr, "Failed to create simple poll object.\n");
176 name = avahi_strdup("MegaPrinter");
178 /* Allocate a new client */
179 client = avahi_client_new(avahi_simple_poll_get(simple_poll), client_callback, NULL, &error);
181 /* Check wether creating the client object succeeded */
183 fprintf(stderr, "Failed to create client: %s\n", avahi_strerror(error));
187 /* Run the main loop */
188 avahi_simple_poll_loop(simple_poll);
197 avahi_client_free(client);
200 avahi_simple_poll_free(simple_poll);