/*
* This file is part of DisOrder.
- * Copyright (C) 2004, 2005 Richard Kettlewell
+ * Copyright (C) 2004, 2005, 2007-2009 Richard Kettlewell
*
- * This program is free software; you can redistribute it and/or modify
+ * This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
+ * the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
- * This program 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
- * General Public License for more details.
- *
+ * This program 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 General Public License for more details.
+ *
* You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
- * USA
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
+/** @file server/state.c
+ * @brief Global server state
+ */
+#include "disorder-server.h"
-#include <config.h>
-
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <sys/stat.h>
-#include <unistd.h>
-#include <locale.h>
-#include <stdio.h>
-#include <pcre.h>
-#include <netdb.h>
-#include <sys/un.h>
-#include <netinet/in.h>
-
-#include "event.h"
-#include "play.h"
-#include "trackdb.h"
-#include "state.h"
-#include "configuration.h"
-#include "log.h"
-#include "queue.h"
-#include "server-queue.h"
-#include "server.h"
-#include "printf.h"
-#include "addr.h"
-
+/** @brief Current AF_UNIX socket path */
static const char *current_unix;
+
+/** @brief Current AF_UNIX socket */
static int current_unix_fd;
-static struct addrinfo *current_listen_addrinfo;
-static int current_listen_fd;
+/** @brief TCP listener definition */
+struct listener {
+ /** @brief Next listener */
+ struct listener *next;
+
+ /** @brief Local socket address */
+ struct sockaddr *sa;
+
+ /** @brief File descriptor */
+ int fd;
+};
+
+/** @brief Current listeners */
+static struct listener *listeners;
+/** @brief Current audio API */
+const struct uaudio *api;
+
+/** @brief Quit DisOrder */
void quit(ev_source *ev) {
+ info("shutting down...");
quitting(ev);
trackdb_close();
trackdb_deinit();
- info("terminating");
+ info("exiting");
exit(0);
}
+/** @brief Create a copy of an @c addrinfo structure */
+static struct sockaddr *copy_sockaddr(const struct addrinfo *addr) {
+ struct sockaddr *sa = xmalloc_noptr(addr->ai_addrlen);
+ memcpy(sa, addr->ai_addr, addr->ai_addrlen);
+ return sa;
+}
+
+/** @brief Create and destroy sockets to set current configuration */
static void reset_socket(ev_source *ev) {
const char *new_unix;
- struct addrinfo *res;
+ struct addrinfo *res, *r;
+ struct listener *l, **ll;
struct sockaddr_un sun;
- char *name;
-
- static const struct addrinfo pref = {
- AI_PASSIVE,
- PF_INET,
- SOCK_STREAM,
- IPPROTO_TCP,
- 0,
- 0,
- 0,
- 0
- };
/* unix first */
new_unix = config_get_file("socket");
}
/* get the new listen config */
- if(config->listen.n)
- res = get_address(&config->listen, &pref, &name);
+ if(config->listen.af != -1)
+ res = netaddress_resolve(&config->listen, 1, IPPROTO_TCP);
else
res = 0;
- if((res && !current_listen_addrinfo)
- || (current_listen_addrinfo
- && (!res
- || addrinfocmp(res, current_listen_addrinfo)))) {
- /* something has to change */
- if(current_listen_addrinfo) {
- /* delete the old listener */
- server_stop(ev, current_listen_fd);
- freeaddrinfo(current_listen_addrinfo);
- current_listen_addrinfo = 0;
+ /* Close any current listeners that aren't required any more */
+ ll = &listeners;
+ while((l = *ll)) {
+ for(r = res; r; r = r->ai_next)
+ if(!sockaddrcmp(r->ai_addr, l->sa))
+ break;
+ if(!r) {
+ /* Didn't find a match, remove this one */
+ server_stop(ev, l->fd);
+ *ll = l->next;
+ } else {
+ /* This address is still wanted */
+ ll = &l->next;
}
- if(res) {
- /* start the new listener */
- if((current_listen_fd = server_start(ev, res->ai_family, res->ai_addrlen,
- res->ai_addr, name)) >= 0) {
- current_listen_addrinfo = res;
- res = 0;
+ }
+
+ /* Open any new listeners that are required */
+ for(r = res; r; r = r->ai_next) {
+ for(l = listeners; l; l = l->next)
+ if(!sockaddrcmp(r->ai_addr, l->sa))
+ break;
+ if(!l) {
+ /* Didn't find a match, need a new listener */
+ int fd = server_start(ev, r->ai_family, r->ai_addrlen, r->ai_addr,
+ format_sockaddr(r->ai_addr));
+ if(fd >= 0) {
+ l = xmalloc(sizeof *l);
+ l->next = listeners;
+ l->sa = copy_sockaddr(r);
+ l->fd = fd;
+ listeners = l;
}
+ /* We ignore any failures (though server_start() will have
+ * logged them). */
}
}
/* if res is still set it needs freeing */
freeaddrinfo(res);
}
+/** @brief Reconfigure the server
+ * @param reload 0 at startup, 1 for a reload
+ */
int reconfigure(ev_source *ev, int reload) {
int need_another_rescan = 0;
int ret = 0;
D(("reconfigure(%d)", reload));
+ /* Deconfigure the old audio API if there is one */
+ if(api) {
+ if(api->close_mixer)
+ api->close_mixer();
+ api = NULL;
+ }
if(reload) {
+ /* If there's a rescan in progress, cancel it but remember to start a fresh
+ * one after the reload */
need_another_rescan = trackdb_rescan_cancel();
+ /* Close the track database */
trackdb_close();
- if(config_read(1))
+ /* (Re-)read the configuration */
+ if(config_read(1/*server*/, config))
ret = -1;
else {
/* Tell the speaker it needs to reload its config too. */
speaker_reload();
info("%s: installed new configuration", configfile);
}
+ /* Re-open track database. We don't attempt to support database version
+ * upgrade at this point - the software hasn't changed, after all. */
trackdb_open(TRACKDB_NO_UPGRADE);
} else
/* We only allow for upgrade at startup */
trackdb_open(TRACKDB_CAN_UPGRADE);
+ /* New audio API */
+ api = uaudio_find(config->api);
+ if(api->configure)
+ api->configure();
+ if(api->open_mixer)
+ api->open_mixer();
+ /* If we interrupted a rescan of all the tracks, start a new one */
if(need_another_rescan)
- trackdb_rescan(ev);
+ trackdb_rescan(ev, 1/*check*/, 0, 0);
+ /* Arrange timeouts for schedule actions */
+ schedule_init(ev);
+ /* TODO what about leftover callbacks from before the reload? */
if(!ret) {
+ /* Read the queue back in */
queue_read();
recent_read();
+ /* Reset sockets */
reset_socket(ev);
}
+ /* TODO we need a careful think about what you can and cannot change with a
+ * reload.
+ *
+ * For instance saving and restoring the queue limits what we can usefuly
+ * keep in the queue data structure. As a general rule, long-term state
+ * ought to be off-limits. So 'home directory' will have to stay where it
+ * is. (This actually means the AF_UNIX socket will never be re-opened.)
+ *
+ * Players certainly ought to be reconfigurable but this raises the ugly
+ * question of what to do about already-started background decoders.
+ *
+ * The audio API is easy to do for the server but a pain for the speaker.
+ *
+ * These two points suggest a general approach: if things that affect the
+ * speaker change, we could just restart it and any extant background
+ * decoders, at the next track change. This would generate a bit of a gap
+ * but presumably reconfiguration is a rare event so this might be
+ * acceptable.
+ */
return ret;
}
Local Variables:
c-basic-offset:2
comment-column:40
+fill-column:79
+indent-tabs-mode:nil
End:
*/
~mdw / disorder / blobdiff