-/* $Id$ */
-
/***
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
#include <assert.h>
#include <avahi-client/client.h>
+#include <avahi-client/publish.h>
+
#include <avahi-common/alternative.h>
#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) {
- assert(g == group);
+static void entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state, AVAHI_GCC_UNUSED void *userdata) {
+ assert(g == group || group == NULL);
+ group = g;
/* 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 with a remote service
+ * 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:
+ ;
}
}
static void create_services(AvahiClient *c) {
- char r[128];
+ char *n, 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 this is the first time we're called, let's create a new
+ * entry group if necessary */
+
+ 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());
+ /* If the group is empty (either because it was just created, or
+ * because it was reset previously, add our entries. */
- /* 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;
- }
+ if (avahi_entry_group_is_empty(group)) {
+ fprintf(stderr, "Adding service '%s'\n", name);
- /* 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;
- }
+ /* Create some random TXT data */
+ snprintf(r, sizeof(r), "random=%i", rand());
- /* 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;
+ /* We will now add two services and one subtype to the entry
+ * group. The two services have the same name, but differ in
+ * the service type (IPP vs. BSD LPR). Only services with the
+ * same name should be put in the same entry group. */
+
+ /* 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) {
+
+ if (ret == AVAHI_ERR_COLLISION)
+ goto collision;
+
+ 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) {
+
+ if (ret == AVAHI_ERR_COLLISION)
+ goto collision;
+
+ 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;
+collision:
+
+ /* A service name collision with a local service 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);
+
+ avahi_entry_group_reset(group);
+
+ create_services(c);
+ return;
+
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)
- /* 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. */
+ 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 */
+ 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. */
+
+ 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())) {
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);
+ client = avahi_client_new(avahi_simple_poll_get(simple_poll), 0, 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;
}
-
+
+ /* After 10s 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 */
- for (;;)
- if (avahi_simple_poll_iterate(simple_poll, -1) != 0)
- break;
-
+ avahi_simple_poll_loop(simple_poll);
+
ret = 0;
-
+
fail:
-
+
/* Cleanup things */
- if (group)
- avahi_entry_group_free(group);
if (client)
avahi_client_free(client);
avahi_simple_poll_free(simple_poll);
avahi_free(name);
-
+
return ret;
}
projects / catta / blobdiff