Introduce stub DACP protocol implementation
This commit is contained in:
Julien BLACHE
parent
168144c1e0
commit
a52ff42697
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@ -42,6 +42,7 @@ forked_daapd_SOURCES = main.c \
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httpd.c httpd.h \
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httpd_rsp.c httpd_rsp.h \
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httpd_daap.c httpd_daap.h \
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httpd_dacp.c httpd_dacp.h \
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dmap_helpers.c dmap_helpers.h \
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transcode.c transcode.h \
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misc.c misc.h \
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@ -0,0 +1,658 @@
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/*
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* Copyright (C) 2010 Julien BLACHE <jb@jblache.org>
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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 2 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, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <sys/queue.h>
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#include <sys/types.h>
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#include <regex.h>
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#include <stdint.h>
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#include <event.h>
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#include "evhttp/evhttp.h"
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#include "logger.h"
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#include "misc.h"
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#include "conffile.h"
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#include "httpd.h"
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#include "httpd_dacp.h"
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#include "dmap_helpers.h"
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/* From httpd_daap.c */
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struct daap_session;
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struct daap_session *
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daap_session_find(struct evhttp_request *req, struct evkeyvalq *query, struct evbuffer *evbuf);
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struct uri_map {
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regex_t preg;
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char *regexp;
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void (*handler)(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query);
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};
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struct dacp_update_request {
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struct evhttp_request *req;
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struct dacp_update_request *next;
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};
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/* Play status update requests */
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static struct dacp_update_request *update_requests;
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/* Update requests helpers */
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static void
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update_fail_cb(struct evhttp_request *req, void *arg)
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{
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struct dacp_update_request *ur;
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struct dacp_update_request *p;
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ur = (struct dacp_update_request *)arg;
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DPRINTF(E_DBG, L_DACP, "Update request: client closed connection\n");
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if (ur == update_requests)
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update_requests = ur->next;
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else
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{
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for (p = update_requests; p && (p->next != ur); p = p->next)
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;
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if (!p)
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{
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DPRINTF(E_LOG, L_DACP, "WARNING: struct dacp_update_request not found in list; BUG!\n");
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return;
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}
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p->next = ur->next;
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}
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free(ur);
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}
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static void
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dacp_reply_ctrlint(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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dmap_add_container(evbuf, "caci", 127); /* 8 + len */
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dmap_add_int(evbuf, "mstt", 200); /* 12 */
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dmap_add_char(evbuf, "muty", 0); /* 9 */
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dmap_add_int(evbuf, "mtco", 1); /* 12 */
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dmap_add_int(evbuf, "mrco", 1); /* 12 */
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dmap_add_container(evbuf, "mlcl", 74); /* 8 + len */
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dmap_add_container(evbuf, "mlit", 66); /* 8 + len */
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dmap_add_int(evbuf, "miid", 1); /* 12 */ /* Database ID */
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dmap_add_char(evbuf, "cmik", 1); /* 9 */
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dmap_add_char(evbuf, "cmsp", 1); /* 9 */
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dmap_add_char(evbuf, "cmsv", 1); /* 9 */
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dmap_add_char(evbuf, "cass", 1); /* 9 */
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dmap_add_char(evbuf, "casu", 1); /* 9 */
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dmap_add_char(evbuf, "ceSG", 1); /* 9 */
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evhttp_send_reply(req, HTTP_OK, "OK", evbuf);
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}
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static void
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dacp_reply_cue(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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/* /cue?command=play&query=...&sort=...&index=N */
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/* /cue?command=clear */
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/* TODO */
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dmap_send_error(req, "cacr", "Not implemented");
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}
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static void
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dacp_reply_pause(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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/* TODO */
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/* 204 No Content is the canonical reply */
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evhttp_send_reply(req, HTTP_NOCONTENT, "No Content", evbuf);
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}
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static void
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dacp_reply_playpause(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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/* TODO */
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/* 204 No Content is the canonical reply */
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evhttp_send_reply(req, HTTP_NOCONTENT, "No Content", evbuf);
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}
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static void
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dacp_reply_nextitem(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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/* TODO */
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/* 204 No Content is the canonical reply */
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evhttp_send_reply(req, HTTP_NOCONTENT, "No Content", evbuf);
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}
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static void
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dacp_reply_previtem(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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/* TODO */
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/* 204 No Content is the canonical reply */
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evhttp_send_reply(req, HTTP_NOCONTENT, "No Content", evbuf);
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}
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static void
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dacp_reply_beginff(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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/* TODO */
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/* 204 No Content is the canonical reply */
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evhttp_send_reply(req, HTTP_NOCONTENT, "No Content", evbuf);
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}
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static void
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dacp_reply_beginrew(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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/* TODO */
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/* 204 No Content is the canonical reply */
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evhttp_send_reply(req, HTTP_NOCONTENT, "No Content", evbuf);
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}
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static void
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dacp_reply_playresume(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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/* TODO */
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/* 204 No Content is the canonical reply */
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evhttp_send_reply(req, HTTP_NOCONTENT, "No Content", evbuf);
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}
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static void
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dacp_reply_playstatusupdate(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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struct dacp_update_request *ur;
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const char *param;
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int current_rev = 2;
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int reqd_rev;
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int ret;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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param = evhttp_find_header(query, "revision-number");
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if (!param)
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{
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DPRINTF(E_LOG, L_DACP, "Missing revision-number in update request\n");
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dmap_send_error(req, "cmst", "Invalid request");
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return;
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}
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ret = safe_atoi(param, &reqd_rev);
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if (ret < 0)
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{
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DPRINTF(E_LOG, L_DACP, "Parameter revision-number not an integer\n");
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dmap_send_error(req, "cmst", "Invalid request");
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return;
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}
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if (reqd_rev == 1)
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{
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dmap_add_container(evbuf, "cmst", 84); /* 8 + len */
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dmap_add_int(evbuf, "mstt", 200); /* 12 */
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dmap_add_int(evbuf, "cmsr", current_rev); /* 12 */
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dmap_add_char(evbuf, "cavc", 1); /* 9 */ /* volume controllable */
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dmap_add_char(evbuf, "caps", 2); /* 9 */ /* play status, 2 = stopped, 3 = paused, 4 = playing */
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dmap_add_char(evbuf, "cash", 0); /* 9 */ /* shuffle, true/false */
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dmap_add_char(evbuf, "carp", 0); /* 9 */ /* repeat, 0 = off, 1 = repeat song, 2 = repeat (playlist) */
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dmap_add_int(evbuf, "caas", 2); /* 12 */ /* album shuffle */
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dmap_add_int(evbuf, "caar", 6); /* 12 */ /* album repeat */
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evhttp_send_reply(req, HTTP_OK, "OK", evbuf);
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return;
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}
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/* Else, just let the request hang until we have changes to push back */
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ur = (struct dacp_update_request *)malloc(sizeof(struct dacp_update_request));
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if (!ur)
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{
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DPRINTF(E_LOG, L_DACP, "Out of memory for update request\n");
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dmap_send_error(req, "cmst", "Out of memory");
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return;
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}
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ur->req = req;
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ur->next = update_requests;
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update_requests = ur;
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/* Set fail_cb; this is an extension to the stock evhttp and will
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* get called if the connection fails before we have an update to
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* push out to the client.
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*/
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req->fail_cb = update_fail_cb;
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req->fail_cb_arg = ur;
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}
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static void
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dacp_reply_nowplayingartwork(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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/* We don't have any support for artwork at the moment... */
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/* No artwork -> 404 Not Found */
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evhttp_send_error(req, HTTP_NOTFOUND, "Not Found");
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}
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static void
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dacp_reply_getproperty(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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const char *param;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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param = evhttp_find_header(query, "properties");
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if (!param)
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{
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DPRINTF(E_WARN, L_DACP, "Invalid DACP getproperty request, no properties\n");
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dmap_send_error(req, "cmgt", "Invalid request");
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return;
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}
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/* The client can request multiple properties at once (hence the parameter
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* name), similar to DAAP meta tags. Should be treated likewise.
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*/
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if (strcmp(param, "dmcp.volume") == 0)
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{
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dmap_add_container(evbuf, "cmgt", 24); /* 8 + len */
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dmap_add_int(evbuf, "mstt", 200); /* 12 */
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dmap_add_int(evbuf, "cmvo", 42); /* 12 */ /* Volume, 0-100 */
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evhttp_send_reply(req, HTTP_OK, "OK", evbuf);
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}
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else
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dmap_send_error(req, "cmgt", "Not implemented");
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}
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static void
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dacp_reply_setproperty(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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/* Known properties:
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* dacp.shufflestate 0/1
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* dacp.repeatstate 0/1/2
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* dacp.playingtime seek to time in ms
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* dmcp.volume 0-100, float
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*/
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/* /ctrl-int/1/setproperty?dacp.shufflestate=1&session-id=100 */
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/* TODO */
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/* 204 No Content is the canonical reply */
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evhttp_send_reply(req, HTTP_NOCONTENT, "No Content", evbuf);
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}
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static void
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dacp_reply_getspeakers(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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/* We're going to pretend we have local speakers... */
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dmap_add_container(evbuf, "casp", 61); /* 8 + len */
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dmap_add_int(evbuf, "mstt", 200); /* 12 */
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dmap_add_container(evbuf, "mdcl", 41); /* 8 + len */
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dmap_add_char(evbuf, "caia", 1); /* 9 */ /* Speaker is active */
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dmap_add_string(evbuf, "minm", "Computer"); /* 8 + len */
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dmap_add_long(evbuf, "msma", 0); /* 16 */ /* Speaker identifier (ApEx mac address or 0 for computer) */
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evhttp_send_reply(req, HTTP_OK, "OK", evbuf);
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}
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static void
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dacp_reply_setspeakers(struct evhttp_request *req, struct evbuffer *evbuf, char **uri, struct evkeyvalq *query)
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{
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struct daap_session *s;
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s = daap_session_find(req, query, evbuf);
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if (!s)
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return;
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/* Query: /setspeakers?speaker-id=0,0xapexid,0xapexid */
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/* TODO */
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/* 204 No Content is the canonical reply */
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evhttp_send_reply(req, HTTP_NOCONTENT, "No Content", evbuf);
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}
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static struct uri_map dacp_handlers[] =
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{
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{
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.regexp = "^/ctrl-int$",
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.handler = dacp_reply_ctrlint
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},
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{
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.regexp = "^/ctrl-int/[[:digit:]]+/cue$",
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.handler = dacp_reply_cue
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},
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{
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.regexp = "^/ctrl-int/[[:digit:]]+/pause$",
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.handler = dacp_reply_pause
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},
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{
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.regexp = "^/ctrl-int/[[:digit:]]+/playpause$",
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.handler = dacp_reply_playpause
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},
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{
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.regexp = "^/ctrl-int/[[:digit:]]+/nextitem$",
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.handler = dacp_reply_nextitem
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},
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{
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.regexp = "^/ctrl-int/[[:digit:]]+/previtem$",
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.handler = dacp_reply_previtem
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},
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{
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.regexp = "^/ctrl-int/[[:digit:]]+/beginff$",
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.handler = dacp_reply_beginff
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},
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{
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.regexp = "^/ctrl-int/[[:digit:]]+/beginrew$",
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.handler = dacp_reply_beginrew
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},
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{
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.regexp = "^/ctrl-int/[[:digit:]]+/playresume$",
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.handler = dacp_reply_playresume
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},
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{
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.regexp = "^/ctrl-int/[[:digit:]]+/playstatusupdate$",
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.handler = dacp_reply_playstatusupdate
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},
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{
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.regexp = "^/ctrl-int/[[:digit:]]+/nowplayingartwork$",
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.handler = dacp_reply_nowplayingartwork
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},
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{
|
||||
.regexp = "^/ctrl-int/[[:digit:]]+/getproperty$",
|
||||
.handler = dacp_reply_getproperty
|
||||
},
|
||||
{
|
||||
.regexp = "^/ctrl-int/[[:digit:]]+/setproperty$",
|
||||
.handler = dacp_reply_setproperty
|
||||
},
|
||||
{
|
||||
.regexp = "^/ctrl-int/[[:digit:]]+/getspeakers$",
|
||||
.handler = dacp_reply_getspeakers
|
||||
},
|
||||
{
|
||||
.regexp = "^/ctrl-int/[[:digit:]]+/setspeakers$",
|
||||
.handler = dacp_reply_setspeakers
|
||||
},
|
||||
{
|
||||
.regexp = NULL,
|
||||
.handler = NULL
|
||||
}
|
||||
};
|
||||
|
||||
void
|
||||
dacp_request(struct evhttp_request *req)
|
||||
{
|
||||
char *full_uri;
|
||||
char *uri;
|
||||
char *ptr;
|
||||
char *uri_parts[7];
|
||||
struct evbuffer *evbuf;
|
||||
struct evkeyvalq query;
|
||||
int handler;
|
||||
int ret;
|
||||
int i;
|
||||
|
||||
memset(&query, 0, sizeof(struct evkeyvalq));
|
||||
|
||||
full_uri = httpd_fixup_uri(req);
|
||||
if (!full_uri)
|
||||
{
|
||||
evhttp_send_error(req, HTTP_BADREQUEST, "Bad Request");
|
||||
return;
|
||||
}
|
||||
|
||||
ptr = strchr(full_uri, '?');
|
||||
if (ptr)
|
||||
*ptr = '\0';
|
||||
|
||||
uri = strdup(full_uri);
|
||||
if (!uri)
|
||||
{
|
||||
evhttp_send_error(req, HTTP_BADREQUEST, "Bad Request");
|
||||
return;
|
||||
}
|
||||
|
||||
if (ptr)
|
||||
*ptr = '?';
|
||||
|
||||
ptr = uri;
|
||||
uri = evhttp_decode_uri(uri);
|
||||
free(ptr);
|
||||
|
||||
DPRINTF(E_DBG, L_DACP, "DACP request: %s\n", full_uri);
|
||||
|
||||
handler = -1;
|
||||
for (i = 0; dacp_handlers[i].handler; i++)
|
||||
{
|
||||
ret = regexec(&dacp_handlers[i].preg, uri, 0, NULL, 0);
|
||||
if (ret == 0)
|
||||
{
|
||||
handler = i;
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
if (handler < 0)
|
||||
{
|
||||
DPRINTF(E_LOG, L_DACP, "Unrecognized DACP request\n");
|
||||
|
||||
evhttp_send_error(req, HTTP_BADREQUEST, "Bad Request");
|
||||
|
||||
free(uri);
|
||||
free(full_uri);
|
||||
return;
|
||||
}
|
||||
|
||||
/* DACP has no HTTP authentication - Remote is identified by its pairing-guid */
|
||||
|
||||
memset(uri_parts, 0, sizeof(uri_parts));
|
||||
|
||||
uri_parts[0] = strtok_r(uri, "/", &ptr);
|
||||
for (i = 1; (i < sizeof(uri_parts) / sizeof(uri_parts[0])) && uri_parts[i - 1]; i++)
|
||||
{
|
||||
uri_parts[i] = strtok_r(NULL, "/", &ptr);
|
||||
}
|
||||
|
||||
if (!uri_parts[0] || uri_parts[i - 1] || (i < 2))
|
||||
{
|
||||
DPRINTF(E_LOG, L_DACP, "DACP URI has too many/few components (%d)\n", (uri_parts[0]) ? i : 0);
|
||||
|
||||
evhttp_send_error(req, HTTP_BADREQUEST, "Bad Request");
|
||||
|
||||
free(uri);
|
||||
free(full_uri);
|
||||
return;
|
||||
}
|
||||
|
||||
evbuf = evbuffer_new();
|
||||
if (!evbuf)
|
||||
{
|
||||
DPRINTF(E_LOG, L_DACP, "Could not allocate evbuffer for DACP reply\n");
|
||||
|
||||
evhttp_send_error(req, HTTP_SERVUNAVAIL, "Internal Server Error");
|
||||
|
||||
free(uri);
|
||||
free(full_uri);
|
||||
return;
|
||||
}
|
||||
|
||||
evhttp_parse_query(full_uri, &query);
|
||||
|
||||
evhttp_add_header(req->output_headers, "DAAP-Server", "forked-daapd/" VERSION);
|
||||
/* Content-Type for all DACP replies; can be overriden as needed */
|
||||
evhttp_add_header(req->output_headers, "Content-Type", "application/x-dmap-tagged");
|
||||
|
||||
dacp_handlers[handler].handler(req, evbuf, uri_parts, &query);
|
||||
|
||||
evbuffer_free(evbuf);
|
||||
evhttp_clear_headers(&query);
|
||||
free(uri);
|
||||
free(full_uri);
|
||||
}
|
||||
|
||||
int
|
||||
dacp_is_request(struct evhttp_request *req, char *uri)
|
||||
{
|
||||
if (strncmp(uri, "/ctrl-int/", strlen("/ctrl-int/")) == 0)
|
||||
return 1;
|
||||
if (strcmp(uri, "/ctrl-int") == 0)
|
||||
return 1;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
int
|
||||
dacp_init(void)
|
||||
{
|
||||
char buf[64];
|
||||
int i;
|
||||
int ret;
|
||||
|
||||
update_requests = NULL;
|
||||
|
||||
for (i = 0; dacp_handlers[i].handler; i++)
|
||||
{
|
||||
ret = regcomp(&dacp_handlers[i].preg, dacp_handlers[i].regexp, REG_EXTENDED | REG_NOSUB);
|
||||
if (ret != 0)
|
||||
{
|
||||
regerror(ret, &dacp_handlers[i].preg, buf, sizeof(buf));
|
||||
|
||||
DPRINTF(E_FATAL, L_DACP, "DACP init failed; regexp error: %s\n", buf);
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void
|
||||
dacp_deinit(void)
|
||||
{
|
||||
struct dacp_update_request *ur;
|
||||
int i;
|
||||
|
||||
for (i = 0; dacp_handlers[i].handler; i++)
|
||||
regfree(&dacp_handlers[i].preg);
|
||||
|
||||
for (ur = update_requests; update_requests; ur = update_requests)
|
||||
{
|
||||
update_requests = ur->next;
|
||||
|
||||
free(ur);
|
||||
}
|
||||
}
|
||||
|
|
@ -0,0 +1,20 @@
|
|||
|
||||
#ifndef __HTTPD_DACP_H__
|
||||
#define __HTTPD_DACP_H__
|
||||
|
||||
#include <event.h>
|
||||
#include "evhttp/evhttp.h"
|
||||
|
||||
int
|
||||
dacp_init(void);
|
||||
|
||||
void
|
||||
dacp_deinit(void);
|
||||
|
||||
void
|
||||
dacp_request(struct evhttp_request *req);
|
||||
|
||||
int
|
||||
dacp_is_request(struct evhttp_request *req, char *uri);
|
||||
|
||||
#endif /* !__HTTPD_DACP_H__ */
|
||||
Loading…
Reference in New Issue