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-core/core.h>
32 #include <avahi-core/publish.h>
33 #include <avahi-common/simple-watch.h>
34 #include <avahi-common/malloc.h>
35 #include <avahi-common/alternative.h>
36 #include <avahi-common/error.h>
38 static AvahiSEntryGroup *group = NULL;
39 static AvahiSimplePoll *simple_poll = NULL;
40 static char *name = NULL;
42 static void create_services(AvahiServer *s);
44 static void entry_group_callback(AvahiServer *s, AvahiSEntryGroup *g, AvahiEntryGroupState state, AVAHI_GCC_UNUSED void *userdata) {
48 /* Called whenever the entry group state changes */
52 case AVAHI_ENTRY_GROUP_ESTABLISHED:
54 /* The entry group has been established successfully */
55 fprintf(stderr, "Service '%s' successfully established.\n", name);
58 case AVAHI_ENTRY_GROUP_COLLISION: {
61 /* A service name collision happened. Let's pick a new name */
62 n = avahi_alternative_service_name(name);
66 fprintf(stderr, "Service name collision, renaming service to '%s'\n", name);
68 /* And recreate the services */
73 case AVAHI_ENTRY_GROUP_FAILURE :
75 fprintf(stderr, "Entry group failure: %s\n", avahi_strerror(avahi_server_errno(s)));
77 /* Some kind of failure happened while we were registering our services */
78 avahi_simple_poll_quit(simple_poll);
81 case AVAHI_ENTRY_GROUP_UNCOMMITED:
82 case AVAHI_ENTRY_GROUP_REGISTERING:
87 static void create_services(AvahiServer *s) {
92 /* If this is the first time we're called, let's create a new entry group */
94 if (!(group = avahi_s_entry_group_new(s, entry_group_callback, NULL))) {
95 fprintf(stderr, "avahi_entry_group_new() failed: %s\n", avahi_strerror(avahi_server_errno(s)));
99 fprintf(stderr, "Adding service '%s'\n", name);
101 /* Create some random TXT data */
102 snprintf(r, sizeof(r), "random=%i", rand());
104 /* Add the service for IPP */
105 if ((ret = avahi_server_add_service(s, group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, "_ipp._tcp", NULL, NULL, 651, "test=blah", r, NULL)) < 0) {
106 fprintf(stderr, "Failed to add _ipp._tcp service: %s\n", avahi_strerror(ret));
110 /* Add the same service for BSD LPR */
111 if ((ret = avahi_server_add_service(s, group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, "_printer._tcp", NULL, NULL, 515, NULL)) < 0) {
112 fprintf(stderr, "Failed to add _printer._tcp service: %s\n", avahi_strerror(ret));
116 /* Add an additional (hypothetic) subtype */
117 if ((ret = avahi_server_add_service_subtype(s, group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, "_printer._tcp", NULL, "_magic._sub._printer._tcp") < 0)) {
118 fprintf(stderr, "Failed to add subtype _magic._sub._printer._tcp: %s\n", avahi_strerror(ret));
122 /* Tell the server to register the service */
123 if ((ret = avahi_s_entry_group_commit(group)) < 0) {
124 fprintf(stderr, "Failed to commit entry_group: %s\n", avahi_strerror(ret));
131 avahi_simple_poll_quit(simple_poll);
134 static void server_callback(AvahiServer *s, AvahiServerState state, AVAHI_GCC_UNUSED void * userdata) {
137 /* Called whenever the server state changes */
141 case AVAHI_SERVER_RUNNING:
142 /* The serve has startup successfully and registered its host
143 * name on the network, so it's time to create our services */
150 case AVAHI_SERVER_COLLISION: {
154 /* A host name collision happened. Let's pick a new name for the server */
155 n = avahi_alternative_host_name(avahi_server_get_host_name(s));
156 fprintf(stderr, "Host name collision, retrying with '%s'\n", n);
157 r = avahi_server_set_host_name(s, n);
161 fprintf(stderr, "Failed to set new host name: %s\n", avahi_strerror(r));
163 avahi_simple_poll_quit(simple_poll);
171 case AVAHI_SERVER_REGISTERING:
173 /* Let's drop our registered services. When the server is back
174 * in AVAHI_SERVER_RUNNING state we will register them
175 * again with the new host name. */
177 avahi_s_entry_group_reset(group);
181 case AVAHI_SERVER_FAILURE:
183 /* Terminate on failure */
185 fprintf(stderr, "Server failure: %s\n", avahi_strerror(avahi_server_errno(s)));
186 avahi_simple_poll_quit(simple_poll);
189 case AVAHI_SERVER_INVALID:
194 int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
195 AvahiServerConfig config;
196 AvahiServer *server = NULL;
200 /* Initialize the pseudo-RNG */
203 /* Allocate main loop object */
204 if (!(simple_poll = avahi_simple_poll_new())) {
205 fprintf(stderr, "Failed to create simple poll object.\n");
209 name = avahi_strdup("MegaPrinter");
211 /* Let's set the host name for this server. */
212 avahi_server_config_init(&config);
213 config.host_name = avahi_strdup("gurkiman");
214 config.publish_workstation = 0;
216 /* Allocate a new server */
217 server = avahi_server_new(avahi_simple_poll_get(simple_poll), &config, server_callback, NULL, &error);
219 /* Free the configuration data */
220 avahi_server_config_free(&config);
222 /* Check wether creating the server object succeeded */
224 fprintf(stderr, "Failed to create server: %s\n", avahi_strerror(error));
228 /* Run the main loop */
229 avahi_simple_poll_loop(simple_poll);
238 avahi_server_free(server);
241 avahi_simple_poll_free(simple_poll);