244 lines
7.2 KiB
C
244 lines
7.2 KiB
C
/***
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This file is part of avahi.
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avahi is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as
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published by the Free Software Foundation; either version 2.1 of the
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License, or (at your option) any later version.
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avahi is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General
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Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with avahi; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <time.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <assert.h>
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#include <avahi-core/core.h>
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#include <avahi-core/publish.h>
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#include <avahi-common/simple-watch.h>
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#include "avahi-common/avahi-malloc.h"
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#include <avahi-common/alternative.h>
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#include <avahi-common/error.h>
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static AvahiSEntryGroup *group = NULL;
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static AvahiSimplePoll *simple_poll = NULL;
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static char *name = NULL;
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static void create_services(AvahiServer *s);
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static void entry_group_callback(AvahiServer *s, AvahiSEntryGroup *g, AvahiEntryGroupState state, AVAHI_GCC_UNUSED void *userdata) {
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assert(s);
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assert(g == group);
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/* Called whenever the entry group state changes */
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switch (state) {
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case AVAHI_ENTRY_GROUP_ESTABLISHED:
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/* The entry group has been established successfully */
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fprintf(stderr, "Service '%s' successfully established.\n", name);
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break;
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case AVAHI_ENTRY_GROUP_COLLISION: {
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char *n;
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/* A service name collision happened. Let's pick a new name */
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n = avahi_alternative_service_name(name);
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avahi_free(name);
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name = n;
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fprintf(stderr, "Service name collision, renaming service to '%s'\n", name);
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/* And recreate the services */
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create_services(s);
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break;
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}
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case AVAHI_ENTRY_GROUP_FAILURE :
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fprintf(stderr, "Entry group failure: %s\n", avahi_strerror(avahi_server_errno(s)));
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/* Some kind of failure happened while we were registering our services */
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avahi_simple_poll_quit(simple_poll);
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break;
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case AVAHI_ENTRY_GROUP_UNCOMMITED:
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case AVAHI_ENTRY_GROUP_REGISTERING:
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;
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}
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}
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static void create_services(AvahiServer *s) {
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char r[128];
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int ret;
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assert(s);
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/* If this is the first time we're called, let's create a new entry group */
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if (!group)
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if (!(group = avahi_s_entry_group_new(s, entry_group_callback, NULL))) {
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fprintf(stderr, "avahi_entry_group_new() failed: %s\n", avahi_strerror(avahi_server_errno(s)));
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goto fail;
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}
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fprintf(stderr, "Adding service '%s'\n", name);
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/* Create some random TXT data */
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snprintf(r, sizeof(r), "random=%i", rand());
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/* Add the service for IPP */
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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) {
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fprintf(stderr, "Failed to add _ipp._tcp service: %s\n", avahi_strerror(ret));
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goto fail;
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}
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/* Add the same service for BSD LPR */
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if ((ret = avahi_server_add_service(s, group, AVAHI_IF_UNSPEC, AVAHI_PROTO_UNSPEC, 0, name, "_printer._tcp", NULL, NULL, 515, NULL)) < 0) {
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fprintf(stderr, "Failed to add _printer._tcp service: %s\n", avahi_strerror(ret));
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goto fail;
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}
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/* Add an additional (hypothetic) subtype */
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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)) {
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fprintf(stderr, "Failed to add subtype _magic._sub._printer._tcp: %s\n", avahi_strerror(ret));
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goto fail;
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}
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/* Tell the server to register the service */
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if ((ret = avahi_s_entry_group_commit(group)) < 0) {
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fprintf(stderr, "Failed to commit entry_group: %s\n", avahi_strerror(ret));
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goto fail;
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}
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return;
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fail:
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avahi_simple_poll_quit(simple_poll);
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}
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static void server_callback(AvahiServer *s, AvahiServerState state, AVAHI_GCC_UNUSED void * userdata) {
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assert(s);
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/* Called whenever the server state changes */
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switch (state) {
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case AVAHI_SERVER_RUNNING:
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/* The serve has startup successfully and registered its host
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* name on the network, so it's time to create our services */
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if (!group)
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create_services(s);
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break;
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case AVAHI_SERVER_COLLISION: {
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char *n;
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int r;
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/* A host name collision happened. Let's pick a new name for the server */
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n = avahi_alternative_host_name(avahi_server_get_host_name(s));
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fprintf(stderr, "Host name collision, retrying with '%s'\n", n);
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r = avahi_server_set_host_name(s, n);
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avahi_free(n);
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if (r < 0) {
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fprintf(stderr, "Failed to set new host name: %s\n", avahi_strerror(r));
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avahi_simple_poll_quit(simple_poll);
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return;
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}
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}
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/* Fall through */
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case AVAHI_SERVER_REGISTERING:
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/* Let's drop our registered services. When the server is back
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* in AVAHI_SERVER_RUNNING state we will register them
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* again with the new host name. */
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if (group)
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avahi_s_entry_group_reset(group);
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break;
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case AVAHI_SERVER_FAILURE:
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/* Terminate on failure */
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fprintf(stderr, "Server failure: %s\n", avahi_strerror(avahi_server_errno(s)));
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avahi_simple_poll_quit(simple_poll);
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break;
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case AVAHI_SERVER_INVALID:
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;
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}
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}
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int main(AVAHI_GCC_UNUSED int argc, AVAHI_GCC_UNUSED char*argv[]) {
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AvahiServerConfig config;
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AvahiServer *server = NULL;
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int error;
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int ret = 1;
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/* Initialize the pseudo-RNG */
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srand(time(NULL));
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/* Allocate main loop object */
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if (!(simple_poll = avahi_simple_poll_new())) {
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fprintf(stderr, "Failed to create simple poll object.\n");
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goto fail;
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}
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name = avahi_strdup("MegaPrinter");
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/* Let's set the host name for this server. */
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avahi_server_config_init(&config);
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config.host_name = avahi_strdup("gurkiman");
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config.publish_workstation = 0;
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/* Allocate a new server */
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server = avahi_server_new(avahi_simple_poll_get(simple_poll), &config, server_callback, NULL, &error);
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/* Free the configuration data */
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avahi_server_config_free(&config);
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/* Check wether creating the server object succeeded */
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if (!server) {
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fprintf(stderr, "Failed to create server: %s\n", avahi_strerror(error));
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goto fail;
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}
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/* Run the main loop */
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avahi_simple_poll_loop(simple_poll);
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ret = 0;
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fail:
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/* Cleanup things */
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if (server)
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avahi_server_free(server);
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if (simple_poll)
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avahi_simple_poll_free(simple_poll);
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avahi_free(name);
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return ret;
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}
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