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, void *userdata) {
48 /* Called whenever the entry group state changes */
50 if (state == AVAHI_ENTRY_GROUP_ESTABLISHED)
51 /* The entry group has been established successfully */
52 fprintf(stderr, "Service '%s' successfully established.\n", name);
54 else if (state == AVAHI_ENTRY_GROUP_COLLISION) {
57 /* A service name collision happened. Let's pick a new name */
58 n = avahi_alternative_service_name(name);
62 fprintf(stderr, "Service name collision, renaming service to '%s'\n", name);
64 /* And recreate the services */
65 create_services(avahi_entry_group_get_client(g));
69 static void create_services(AvahiClient *c) {
74 /* If this is the first time we're called, let's create a new entry group */
76 if (!(group = avahi_entry_group_new(c, entry_group_callback, NULL))) {
77 fprintf(stderr, "avahi_entry_group_new() failed: %s\n", avahi_strerror(avahi_client_errno(c)));
81 fprintf(stderr, "Adding service '%s'\n", name);
83 /* Create some random TXT data */
84 snprintf(r, sizeof(r), "random=%i", rand());
86 /* Add the service for IPP */
87 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) {
88 fprintf(stderr, "Failed to add _ipp._tcp service: %s\n", avahi_strerror(ret));
92 /* Add the same service for BSD LPR */
93 if ((ret = avahi_entry_group_add_service(group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, "_printer._tcp", NULL, NULL, 515, NULL)) < 0) {
94 fprintf(stderr, "Failed to add _printer._tcp service: %s\n", avahi_strerror(ret));
98 /* Add an additional (hypothetic) subtype */
99 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)) {
100 fprintf(stderr, "Failed to add subtype _magic._sub._printer._tcp: %s\n", avahi_strerror(ret));
104 /* Tell the server to register the service */
105 if ((ret = avahi_entry_group_commit(group)) < 0) {
106 fprintf(stderr, "Failed to commit entry_group: %s\n", avahi_strerror(ret));
113 avahi_simple_poll_quit(simple_poll);
117 static void client_callback(AvahiClient *c, AvahiClientState state, void * userdata) {
120 /* Called whenever the client or server state changes */
122 if (state == AVAHI_CLIENT_S_RUNNING) {
124 /* The server has startup successfully and registered its host
125 * name on the network, so it's time to create our services */
129 } else if (state == AVAHI_CLIENT_S_COLLISION) {
131 /* Let's drop our registered services. When the server is back
132 * in AVAHI_SERVER_RUNNING state we will register them
133 * again with the new host name. */
135 avahi_entry_group_reset(group);
137 } else if (state == AVAHI_CLIENT_DISCONNECTED) {
139 fprintf(stderr, "Server connection terminated.\n");
140 avahi_simple_poll_quit(simple_poll);
144 int main(int argc, char*argv[]) {
145 AvahiClient *client = NULL;
149 /* Allocate main loop object */
150 if (!(simple_poll = avahi_simple_poll_new())) {
151 fprintf(stderr, "Failed to create simple poll object.\n");
155 name = avahi_strdup("MegaPrinter");
157 /* Allocate a new client */
158 client = avahi_client_new(avahi_simple_poll_get(simple_poll), client_callback, NULL, &error);
160 /* Check wether creating the client object succeeded */
162 fprintf(stderr, "Failed to create client: %s\n", avahi_strerror(error));
166 /* Run the main loop */
167 avahi_simple_poll_loop(simple_poll);
176 avahi_client_free(client);
179 avahi_simple_poll_free(simple_poll);