#include <avahi-common/simple-watch.h>
#include <avahi-common/malloc.h>
#include <avahi-common/error.h>
+#include <avahi-common/timeval.h>
static AvahiEntryGroup *group = NULL;
static AvahiSimplePoll *simple_poll = NULL;
static void create_services(AvahiClient *c);
-static void entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, void *userdata) {
+static void entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, AVAHI_GCC_UNUSED 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;
+ switch (state) {
+ case AVAHI_ENTRY_GROUP_ESTABLISHED :
+ /* The entry group has been established successfully */
+ fprintf(stderr, "Service '%s' successfully established.\n", name);
+ break;
+
+ case 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));
+ break;
+ }
- /* A service name collision happened. Let's pick a new name */
- n = avahi_alternative_service_name(name);
- avahi_free(name);
- name = n;
+ case AVAHI_ENTRY_GROUP_FAILURE :
- fprintf(stderr, "Service name collision, renaming service to '%s'\n", name);
+ fprintf(stderr, "Entry group failure: %s\n", avahi_strerror(avahi_client_errno(avahi_entry_group_get_client(g))));
- /* And recreate the services */
- create_services(avahi_entry_group_get_client(g));
+ /* Some kind of failure happened while we were registering our services */
+ avahi_simple_poll_quit(simple_poll);
+ break;
+
+ case AVAHI_ENTRY_GROUP_UNCOMMITED:
+ case AVAHI_ENTRY_GROUP_REGISTERING:
+ ;
}
}
fail:
avahi_simple_poll_quit(simple_poll);
- return;
}
-static void client_callback(AvahiClient *c, AvahiClientState state, void * userdata) {
+static void client_callback(AvahiClient *c, AvahiClientState state, AVAHI_GCC_UNUSED void * userdata) {
assert(c);
/* Called whenever the client or server state changes */
- if (state == AVAHI_CLIENT_S_RUNNING) {
+ switch (state) {
+ case AVAHI_CLIENT_S_RUNNING:
- /* The server has startup successfully and registered its host
- * name on the network, so it's time to create our services */
- if (group)
- create_services(c);
-
- } else if (state == AVAHI_CLIENT_S_COLLISION) {
+ /* The server has startup successfully and registered its host
+ * name on the network, so it's time to create our services */
+ if (!group)
+ create_services(c);
+ break;
+
+ case AVAHI_CLIENT_FAILURE:
+
+ fprintf(stderr, "Client failure: %s\n", avahi_strerror(avahi_client_errno(c)));
+ avahi_simple_poll_quit(simple_poll);
+
+ break;
+
+ case 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. */
+ /* 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. */
+
+ case AVAHI_CLIENT_S_REGISTERING:
+
+ /* The server records are now being established. This
+ * might be caused by a host name change. We need to wait
+ * for our own records to register until the host name is
+ * properly esatblished. */
+
+ if (group)
+ avahi_entry_group_reset(group);
+
+ break;
+
+ case AVAHI_CLIENT_CONNECTING:
+ ;
+ }
+}
+
+static void modify_callback(AVAHI_GCC_UNUSED AvahiTimeout *e, void *userdata) {
+ AvahiClient *client = userdata;
+
+ fprintf(stderr, "Doing some weird modification\n");
+
+ avahi_free(name);
+ name = avahi_strdup("Modified MegaPrinter");
+
+ /* If the server is currently running, we need to remove our
+ * service and create it anew */
+ if (avahi_client_get_state(client) == AVAHI_CLIENT_S_RUNNING) {
+
+ /* Remove the old services */
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);
+ /* And create them again with the new name */
+ create_services(client);
}
}
-int main(int argc, char*argv[]) {
+int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
AvahiClient *client = NULL;
int error;
int ret = 1;
+ struct timeval tv;
/* Allocate main loop object */
if (!(simple_poll = avahi_simple_poll_new())) {
name = avahi_strdup("MegaPrinter");
/* Allocate a new client */
- client = avahi_client_new(avahi_simple_poll_get(simple_poll), client_callback, NULL, &error);
+ client = avahi_client_new(avahi_simple_poll_get(simple_poll), 0, client_callback, NULL, &error);
/* Check wether creating the client object succeeded */
if (!client) {
goto fail;
}
+ /* After 20s do some weird modification to the service */
+ avahi_simple_poll_get(simple_poll)->timeout_new(
+ avahi_simple_poll_get(simple_poll),
+ avahi_elapse_time(&tv, 1000*10, 0),
+ modify_callback,
+ client);
+
/* Run the main loop */
avahi_simple_poll_loop(simple_poll);
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