273 lines
6.6 KiB
C
273 lines
6.6 KiB
C
/*
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* AVAHI service publisher
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* Copyright (C) 2009 Andreas Öman
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/***
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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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#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-client/client.h>
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#include <avahi-client/publish.h>
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#include <avahi-common/alternative.h>
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#include <avahi-common/simple-watch.h>
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#include <avahi-common/malloc.h>
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#include <avahi-common/error.h>
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#include <avahi-common/timeval.h>
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#include "tvheadend.h"
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#include "avahi.h"
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static AvahiEntryGroup *group = NULL;
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static char *name = NULL;
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static void create_services(AvahiClient *c);
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static void
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entry_group_callback(AvahiEntryGroup *g, AvahiEntryGroupState state,
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void *userdata)
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{
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assert(g == group || group == NULL);
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group = g;
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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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tvhlog(LOG_INFO, "AVAHI",
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"Service '%s' successfully established.", 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 with a remote service
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* 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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tvhlog(LOG_ERR, "AVAHI",
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"Service name collision, renaming service to '%s'", name);
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/* And recreate the services */
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create_services(avahi_entry_group_get_client(g));
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break;
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}
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case AVAHI_ENTRY_GROUP_FAILURE :
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tvhlog(LOG_ERR, "AVAHI",
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"Entry group failure: %s",
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avahi_strerror(avahi_client_errno(avahi_entry_group_get_client(g))));
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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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/**
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*
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*/
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static void
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create_services(AvahiClient *c)
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{
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char *n;
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int ret;
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assert(c);
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/* If this is the first time we're called, let's create a new
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* entry group if necessary */
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if (!group)
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if (!(group = avahi_entry_group_new(c, entry_group_callback, NULL))) {
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tvhlog(LOG_ERR, "AVAHI",
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"avahi_enty_group_new() failed: %s",
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avahi_strerror(avahi_client_errno(c)));
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goto fail;
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}
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/* If the group is empty (either because it was just created, or
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* because it was reset previously, add our entries. */
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if (avahi_entry_group_is_empty(group)) {
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tvhlog(LOG_DEBUG, "AVAHI", "Adding service '%s'", name);
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/* Add the service for HTSP */
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if ((ret = avahi_entry_group_add_service(group, AVAHI_IF_UNSPEC,
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AVAHI_PROTO_UNSPEC, 0, name,
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"_htsp._tcp", NULL, NULL,htsp_port,
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NULL)) < 0) {
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if (ret == AVAHI_ERR_COLLISION)
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goto collision;
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tvhlog(LOG_ERR, "AVAHI",
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"Failed to add _htsp._tcp service: %s",
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avahi_strerror(ret));
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goto fail;
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}
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/* Add the service for HTTP */
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if ((ret = avahi_entry_group_add_service(group, AVAHI_IF_UNSPEC,
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AVAHI_PROTO_UNSPEC, 0, name,
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"_http._tcp", NULL, NULL, webui_port,
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"path=/",
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NULL)) < 0) {
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if (ret == AVAHI_ERR_COLLISION)
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goto collision;
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tvhlog(LOG_ERR, "AVAHI",
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"Failed to add _http._tcp service: %s",
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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_entry_group_commit(group)) < 0) {
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tvhlog(LOG_ERR, "AVAHI",
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"Failed to commit entry group: %s",
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avahi_strerror(ret));
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goto fail;
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}
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}
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return;
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collision:
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/* A service name collision with a local service happened. Let's
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* 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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tvhlog(LOG_ERR, "AVAHI",
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"Service name collision, renaming service to '%s'", name);
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avahi_entry_group_reset(group);
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create_services(c);
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return;
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fail:
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return;
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}
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/**
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*
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*/
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static void
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client_callback(AvahiClient *c, AvahiClientState state, void *userdata)
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{
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assert(c);
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/* Called whenever the client or server state changes */
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switch (state) {
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case AVAHI_CLIENT_S_RUNNING:
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/* The server 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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create_services(c);
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break;
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case AVAHI_CLIENT_FAILURE:
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tvhlog(LOG_ERR, "AVAHI", "Client failure: %s",
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avahi_strerror(avahi_client_errno(c)));
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break;
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case AVAHI_CLIENT_S_COLLISION:
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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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case AVAHI_CLIENT_S_REGISTERING:
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/* The server records are now being established. This
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* might be caused by a host name change. We need to wait
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* for our own records to register until the host name is
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* properly esatblished. */
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if(group)
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avahi_entry_group_reset(group);
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break;
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case AVAHI_CLIENT_CONNECTING:
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;
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}
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}
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/**
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*
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*/
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static void *
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avahi_thread(void *aux)
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{
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AvahiSimplePoll *asp = avahi_simple_poll_new();
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const AvahiPoll *ap = avahi_simple_poll_get(asp);
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name = avahi_strdup("Tvheadend");
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avahi_client_new(ap, AVAHI_CLIENT_NO_FAIL, client_callback, NULL, NULL);
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while((avahi_simple_poll_iterate(asp, -1)) != -1) {}
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return NULL;
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}
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/**
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*
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*/
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void
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avahi_init(void)
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{
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pthread_t tid;
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pthread_create(&tid, NULL, avahi_thread, NULL);
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}
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