mirror of
https://github.com/owntone/owntone-server.git
synced 2025-01-01 01:53:23 -05:00
4090 lines
115 KiB
C
4090 lines
115 KiB
C
/*
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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 <stdbool.h>
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#include <unistd.h>
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#include <stdint.h>
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#include <inttypes.h>
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#include <math.h>
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#include <errno.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <fcntl.h>
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#include <time.h>
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#include <arpa/inet.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <event2/event.h>
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#include <event2/buffer.h>
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#include <gcrypt.h>
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#include "plist_wrap.h"
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#include "evrtsp/evrtsp.h"
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#include "conffile.h"
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#include "logger.h"
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#include "mdns.h"
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#include "misc.h"
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#include "player.h"
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#include "db.h"
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#include "artwork.h"
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#include "dmap_common.h"
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#include "rtp_common.h"
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#include "transcode.h"
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#include "outputs.h"
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#include "airplay_events.h"
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#include "pair_ap/pair.h"
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/* List of TODO's for AirPlay 2
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*
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* inplace encryption
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* latency needs different handling
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* support ipv6, e.g. in SETPEERS
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*
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*/
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// Airplay 2 has a gazallion parameters, many of them unknown to us. With the
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// below it is possible to easily try different variations.
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#define AIRPLAY_USE_STREAMID 0
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#define AIRPLAY_USE_PAIRING_TRANSIENT 1
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#define AIRPLAY_USE_AUTH_SETUP 0
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// Full traffic dumps in the log in debug mode
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#define AIRPLAY_DUMP_TRAFFIC 0
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#define AIRPLAY_QUALITY_SAMPLE_RATE_DEFAULT 44100
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#define AIRPLAY_QUALITY_BITS_PER_SAMPLE_DEFAULT 16
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#define AIRPLAY_QUALITY_CHANNELS_DEFAULT 2
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// AirTunes v2 number of samples per packet
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// Probably using this value because 44100/352 and 48000/352 has good 32 byte
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// alignment, which improves performance of some encoders
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#define AIRPLAY_SAMPLES_PER_PACKET 352
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#define AIRPLAY_RTP_PAYLOADTYPE 0x60
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// For transient pairing the key_len will be 64 bytes, but only 32 are used for
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// audio payload encryption. For normal pairing the key is 32 bytes.
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#define AIRPLAY_AUDIO_KEY_LEN 32
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// How many RTP packets keep in a buffer for retransmission
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#define AIRPLAY_PACKET_BUFFER_SIZE 1000
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#define AIRPLAY_MD_DELAY_STARTUP 15360
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#define AIRPLAY_MD_DELAY_SWITCH (AIRPLAY_MD_DELAY_STARTUP * 2)
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#define AIRPLAY_MD_WANTS_TEXT (1 << 0)
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#define AIRPLAY_MD_WANTS_ARTWORK (1 << 1)
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#define AIRPLAY_MD_WANTS_PROGRESS (1 << 2)
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// ATV4 and Homepod disconnect for reasons that are not clear, but sending them
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// progress metadata at regular intervals reduces the problem. The below
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// interval was determined via testing, see:
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// https://github.com/owntone/owntone-server/issues/734#issuecomment-622959334
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#define AIRPLAY_KEEP_ALIVE_INTERVAL 25
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// This is an arbitrary value which just needs to be kept in sync with the config
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#define AIRPLAY_CONFIG_MAX_VOLUME 11
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/* Keep in sync with const char *airplay_devtype */
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enum airplay_devtype {
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AIRPLAY_DEV_APEX2_80211N,
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AIRPLAY_DEV_APEX3_80211N,
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AIRPLAY_DEV_APPLETV,
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AIRPLAY_DEV_APPLETV4,
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AIRPLAY_DEV_HOMEPOD,
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AIRPLAY_DEV_OTHER,
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};
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// Session is starting up
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#define AIRPLAY_STATE_F_STARTUP (1 << 13)
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// Streaming is up (connection established)
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#define AIRPLAY_STATE_F_CONNECTED (1 << 14)
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// Couldn't start device
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#define AIRPLAY_STATE_F_FAILED (1 << 15)
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enum airplay_state {
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// Device is stopped (no session)
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AIRPLAY_STATE_STOPPED = 0,
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// Session startup
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AIRPLAY_STATE_INFO = AIRPLAY_STATE_F_STARTUP | 0x01,
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AIRPLAY_STATE_ENCRYPTED = AIRPLAY_STATE_F_STARTUP | 0x02,
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AIRPLAY_STATE_SETUP = AIRPLAY_STATE_F_STARTUP | 0x03,
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AIRPLAY_STATE_RECORD = AIRPLAY_STATE_F_STARTUP | 0x04,
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// Session established
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// - streaming ready (RECORD sent and acked, connection established)
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// - commands (SET_PARAMETER) are possible
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AIRPLAY_STATE_CONNECTED = AIRPLAY_STATE_F_CONNECTED | 0x01,
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// Media data is being sent
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AIRPLAY_STATE_STREAMING = AIRPLAY_STATE_F_CONNECTED | 0x02,
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// Session teardown in progress (-> going to STOPPED state)
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AIRPLAY_STATE_TEARDOWN = AIRPLAY_STATE_F_CONNECTED | 0x03,
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// Session is failed, couldn't startup or error occurred
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AIRPLAY_STATE_FAILED = AIRPLAY_STATE_F_FAILED | 0x01,
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// Pending PIN or password
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AIRPLAY_STATE_AUTH = AIRPLAY_STATE_F_FAILED | 0x02,
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};
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enum airplay_seq_type
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{
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AIRPLAY_SEQ_ABORT = -1,
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AIRPLAY_SEQ_START,
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AIRPLAY_SEQ_START_PLAYBACK,
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AIRPLAY_SEQ_PROBE,
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AIRPLAY_SEQ_FLUSH,
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AIRPLAY_SEQ_STOP,
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AIRPLAY_SEQ_FAILURE,
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AIRPLAY_SEQ_PIN_START,
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AIRPLAY_SEQ_SEND_VOLUME,
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AIRPLAY_SEQ_SEND_TEXT,
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AIRPLAY_SEQ_SEND_PROGRESS,
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AIRPLAY_SEQ_SEND_ARTWORK,
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AIRPLAY_SEQ_PAIR_SETUP,
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AIRPLAY_SEQ_PAIR_VERIFY,
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AIRPLAY_SEQ_PAIR_TRANSIENT,
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AIRPLAY_SEQ_FEEDBACK,
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AIRPLAY_SEQ_CONTINUE, // Must be last element
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};
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// From https://openairplay.github.io/airplay-spec/status_flags.html
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enum airplay_status_flags
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{
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AIRPLAY_FLAG_PROBLEM_DETECTED = (1 << 0),
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AIRPLAY_FLAG_NOT_CONFIGURED = (1 << 1),
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AIRPLAY_FLAG_AUDIO_CABLE_ATTACHED = (1 << 2),
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AIRPLAY_FLAG_PIN_REQUIRED = (1 << 3),
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AIRPLAY_FLAG_SUPPORTS_FROM_CLOUD = (1 << 6),
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AIRPLAY_FLAG_PASSWORD_REQUIRED = (1 << 7),
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AIRPLAY_FLAG_ONE_TIME_PAIRING_REQUIRED = (1 << 9),
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AIRPLAY_FLAG_SETUP_HK_ACCESS_CTRL = (1 << 10),
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AIRPLAY_FLAG_SUPPORTS_RELAY = (1 << 11),
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AIRPLAY_FLAG_SILENT_PRIMARY = (1 << 12),
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AIRPLAY_FLAG_TIGHT_SYNC_IS_GRP_LEADER = (1 << 13),
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AIRPLAY_FLAG_TIGHT_SYNC_BUDDY_NOT_REACHABLE = (1 << 14),
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AIRPLAY_FLAG_IS_APPLE_MUSIC_SUBSCRIBER = (1 << 15),
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AIRPLAY_FLAG_CLOUD_LIBRARY_ON = (1 << 16),
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AIRPLAY_FLAG_RECEIVER_IS_BUSY = (1 << 17),
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};
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// Info about the device, which is not required by the player, only internally
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struct airplay_extra
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{
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enum airplay_devtype devtype;
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char *mdns_name;
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uint16_t wanted_metadata;
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bool supports_auth_setup;
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bool supports_pairing_transient;
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};
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struct airplay_master_session
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{
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struct evbuffer *input_buffer;
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int input_buffer_samples;
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// ALAC encoder and buffer for encoded data
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struct encode_ctx *encode_ctx;
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struct evbuffer *encoded_buffer;
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struct rtp_session *rtp_session;
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struct rtcp_timestamp cur_stamp;
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uint8_t *rawbuf;
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size_t rawbuf_size;
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int samples_per_packet;
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struct media_quality quality;
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// Number of samples that we tell the output to buffer (this will mean that
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// the position that we send in the sync packages are offset by this amount
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// compared to the rtptimes of the corresponding RTP packages we are sending)
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int output_buffer_samples;
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struct airplay_master_session *next;
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};
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struct airplay_session
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{
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uint64_t device_id;
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int callback_id;
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struct airplay_master_session *master_session;
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struct evrtsp_connection *ctrl;
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enum airplay_state state;
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enum airplay_seq_type next_seq;
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uint64_t statusflags;
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uint16_t wanted_metadata;
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bool req_has_auth;
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bool supports_auth_setup;
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struct event *deferredev;
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int reqs_in_flight;
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int cseq;
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uint32_t session_id;
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char session_url[128];
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char session_uuid[37];
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char *realm;
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char *nonce;
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const char *password;
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char *devname;
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char *address;
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int family;
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union net_sockaddr naddr;
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int volume;
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char *local_address;
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unsigned short data_port;
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unsigned short control_port;
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unsigned short events_port;
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unsigned short timing_port; // ATV4 has this set to 0, but it is not used by us anyway
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/* Pairing, see pair.h */
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enum pair_type pair_type;
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struct pair_cipher_context *control_cipher_ctx;
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struct pair_verify_context *pair_verify_ctx;
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struct pair_setup_context *pair_setup_ctx;
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uint8_t shared_secret[64];
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size_t shared_secret_len; // 32 or 64, see AIRPLAY_AUDIO_KEY_LEN for comment
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gcry_cipher_hd_t packet_cipher_hd;
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int server_fd;
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struct airplay_service *timing_svc;
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struct airplay_service *control_svc;
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struct airplay_session *next;
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};
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struct airplay_metadata
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{
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struct evbuffer *metadata;
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struct evbuffer *artwork;
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int artwork_fmt;
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};
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struct airplay_service
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{
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int fd;
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unsigned short port;
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struct event *ev;
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};
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/* NTP timestamp definitions */
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#define FRAC 4294967296. /* 2^32 as a double */
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#define NTP_EPOCH_DELTA 0x83aa7e80 /* 2208988800 - that's 1970 - 1900 in seconds */
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// TODO move to rtp_common
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struct ntp_stamp
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{
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uint32_t sec;
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uint32_t frac;
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};
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/* --------------------------- SEQUENCE DEFINITIONS ------------------------- */
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struct airplay_seq_definition
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{
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enum airplay_seq_type seq_type;
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// Called when a sequence ends, successfully or not. Shoulds also, if
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// required, take care of notifying player and free the session.
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void (*on_success)(struct airplay_session *rs);
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void (*on_error)(struct airplay_session *rs);
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};
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struct airplay_seq_request
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{
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enum airplay_seq_type seq_type;
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const char *name; // Name of request (for logging)
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enum evrtsp_cmd_type rtsp_type;
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int (*payload_make)(struct evrtsp_request *req, struct airplay_session *rs, void *arg);
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enum airplay_seq_type (*response_handler)(struct evrtsp_request *req, struct airplay_session *rs);
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const char *content_type;
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const char *uri;
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bool proceed_on_rtsp_not_ok; // If true return code != RTSP_OK will not abort the sequence
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};
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struct airplay_seq_ctx
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{
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struct airplay_seq_request *cur_request;
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void (*on_success)(struct airplay_session *rs);
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void (*on_error)(struct airplay_session *rs);
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struct airplay_session *session;
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void *payload_make_arg;
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const char *log_caller;
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};
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/* ------------------------------ MISC GLOBALS ------------------------------ */
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#if AIRPLAY_USE_AUTH_SETUP
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static const uint8_t airplay_auth_setup_pubkey[] =
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"\x59\x02\xed\xe9\x0d\x4e\xf2\xbd\x4c\xb6\x8a\x63\x30\x03\x82\x07"
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"\xa9\x4d\xbd\x50\xd8\xaa\x46\x5b\x5d\x8c\x01\x2a\x0c\x7e\x1d\x4e";
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#endif
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struct features_type_map
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{
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uint32_t bit;
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char *name;
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};
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// List of features announced by AirPlay 2 speakers
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// Credit @invano, see https://emanuelecozzi.net/docs/airplay2
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static const struct features_type_map features_map[] =
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{
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{ 0, "SupportsAirPlayVideoV1" },
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{ 1, "SupportsAirPlayPhoto" },
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{ 5, "SupportsAirPlaySlideshow" },
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{ 7, "SupportsAirPlayScreen" },
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{ 9, "SupportsAirPlayAudio" },
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{ 11, "AudioRedunant" },
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{ 14, "Authentication_4" }, // FairPlay authentication
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{ 15, "MetadataFeatures_0" }, // Send artwork image to receiver
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{ 16, "MetadataFeatures_1" }, // Send track progress status to receiver
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{ 17, "MetadataFeatures_2" }, // Send NowPlaying info via DAAP
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{ 18, "AudioFormats_0" },
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{ 19, "AudioFormats_1" },
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{ 20, "AudioFormats_2" },
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{ 21, "AudioFormats_3" },
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{ 23, "Authentication_1" }, // RSA authentication (NA)
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{ 26, "Authentication_8" }, // 26 || 51, MFi authentication
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{ 27, "SupportsLegacyPairing" },
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{ 30, "HasUnifiedAdvertiserInfo" },
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{ 32, "IsCarPlay" },
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{ 32, "SupportsVolume" }, // !32
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{ 33, "SupportsAirPlayVideoPlayQueue" },
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{ 34, "SupportsAirPlayFromCloud" }, // 34 && flags_6_SupportsAirPlayFromCloud
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{ 35, "SupportsTLS_PSK" },
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{ 38, "SupportsUnifiedMediaControl" },
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{ 40, "SupportsBufferedAudio" }, // srcvers >= 354.54.6 && 40
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{ 41, "SupportsPTP" }, // srcvers >= 366 && 41
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{ 42, "SupportsScreenMultiCodec" },
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{ 43, "SupportsSystemPairing" },
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{ 44, "IsAPValeriaScreenSender" },
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{ 46, "SupportsHKPairingAndAccessControl" },
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{ 48, "SupportsCoreUtilsPairingAndEncryption" }, // 38 || 46 || 43 || 48
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{ 49, "SupportsAirPlayVideoV2" },
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{ 50, "MetadataFeatures_3" }, // Send NowPlaying info via bplist
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{ 51, "SupportsUnifiedPairSetupAndMFi" },
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{ 52, "SupportsSetPeersExtendedMessage" },
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{ 54, "SupportsAPSync" },
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{ 55, "SupportsWoL" }, // 55 || 56
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{ 56, "SupportsWoL" }, // 55 || 56
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{ 58, "SupportsHangdogRemoteControl" }, // ((isAppleTV || isAppleAudioAccessory) && 58) || (isThirdPartyTV && flags_10)
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{ 59, "SupportsAudioStreamConnectionSetup" }, // 59 && !disableStreamConnectionSetup
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{ 60, "SupportsAudioMediaDataControl" }, // 59 && 60 && !disableMediaDataControl
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{ 61, "SupportsRFC2198Redundancy" },
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};
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/* Keep in sync with enum airplay_devtype */
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static const char *airplay_devtype[] =
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{
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"AirPort Express 2 - 802.11n",
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"AirPort Express 3 - 802.11n",
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"AppleTV",
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"AppleTV4",
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"HomePod",
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"Other",
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};
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/* Struct with default quality levels */
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static struct media_quality airplay_quality_default =
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{
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AIRPLAY_QUALITY_SAMPLE_RATE_DEFAULT,
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AIRPLAY_QUALITY_BITS_PER_SAMPLE_DEFAULT,
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AIRPLAY_QUALITY_CHANNELS_DEFAULT
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};
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/* From player.c */
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extern struct event_base *evbase_player;
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/* AirTunes v2 time synchronization */
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static struct airplay_service airplay_timing_svc;
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/* AirTunes v2 playback synchronization / control */
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static struct airplay_service airplay_control_svc;
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/* Metadata */
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static struct output_metadata *airplay_cur_metadata;
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/* Keep-alive timer - hack for ATV's with tvOS 10 */
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static struct event *keep_alive_timer;
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static struct timeval keep_alive_tv = { AIRPLAY_KEEP_ALIVE_INTERVAL, 0 };
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/* Sessions */
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static struct airplay_master_session *airplay_master_sessions;
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static struct airplay_session *airplay_sessions;
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/* Our own device ID */
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static uint64_t airplay_device_id;
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// Forwards
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static int
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airplay_device_start(struct output_device *rd, int callback_id);
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static void
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sequence_start(enum airplay_seq_type seq_type, struct airplay_session *rs, void *arg, const char *log_caller);
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static void
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sequence_continue(struct airplay_seq_ctx *seq_ctx);
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/* ------------------------------- MISC HELPERS ----------------------------- */
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static inline int
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alac_encode(struct evbuffer *evbuf, struct encode_ctx *encode_ctx, uint8_t *rawbuf, size_t rawbuf_size, int nsamples, struct media_quality *quality)
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{
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transcode_frame *frame;
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int len;
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frame = transcode_frame_new(rawbuf, rawbuf_size, nsamples, quality);
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if (!frame)
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{
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DPRINTF(E_LOG, L_AIRPLAY, "Could not convert raw PCM to frame (bufsize=%zu)\n", rawbuf_size);
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return -1;
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}
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len = transcode_encode(evbuf, encode_ctx, frame, 0);
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transcode_frame_free(frame);
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if (len < 0)
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{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not ALAC encode frame\n");
|
|
return -1;
|
|
}
|
|
|
|
return len;
|
|
}
|
|
|
|
/* AirTunes v2 time synchronization helpers */
|
|
static inline void
|
|
timespec_to_ntp(struct timespec *ts, struct ntp_stamp *ns)
|
|
{
|
|
/* Seconds since NTP Epoch (1900-01-01) */
|
|
ns->sec = ts->tv_sec + NTP_EPOCH_DELTA;
|
|
|
|
ns->frac = (uint32_t)((double)ts->tv_nsec * 1e-9 * FRAC);
|
|
}
|
|
|
|
static inline void
|
|
ntp_to_timespec(struct ntp_stamp *ns, struct timespec *ts)
|
|
{
|
|
/* Seconds since Unix Epoch (1970-01-01) */
|
|
ts->tv_sec = ns->sec - NTP_EPOCH_DELTA;
|
|
|
|
ts->tv_nsec = (long)((double)ns->frac / (1e-9 * FRAC));
|
|
}
|
|
|
|
static inline int
|
|
timing_get_clock_ntp(struct ntp_stamp *ns)
|
|
{
|
|
struct timespec ts;
|
|
int ret;
|
|
|
|
ret = clock_gettime(CLOCK_MONOTONIC, &ts);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Couldn't get clock: %s\n", strerror(errno));
|
|
|
|
return -1;
|
|
}
|
|
|
|
timespec_to_ntp(&ts, ns);
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Converts uint64t libhash -> AA:BB:CC:DD:EE:FF:11:22
|
|
static void
|
|
device_id_colon_make(char *id_str, int size, uint64_t id)
|
|
{
|
|
int r, w;
|
|
|
|
snprintf(id_str, size, "%016" PRIX64, id);
|
|
|
|
for (r = strlen(id_str) - 1, w = size - 2; r != w; r--, w--)
|
|
{
|
|
id_str[w] = id_str[r];
|
|
if (r % 2 == 0)
|
|
{
|
|
w--;
|
|
id_str[w] = ':';
|
|
}
|
|
}
|
|
|
|
id_str[size - 1] = 0; // Zero terminate
|
|
}
|
|
|
|
// Converts AA:BB:CC:DD:EE:FF -> AABBCCDDEEFF -> uint64 id
|
|
static int
|
|
device_id_colon_parse(uint64_t *id, const char *id_str)
|
|
{
|
|
char *s;
|
|
char *ptr;
|
|
int ret;
|
|
|
|
s = calloc(1, strlen(id_str) + 1);
|
|
for (ptr = s; *id_str != '\0'; id_str++)
|
|
{
|
|
if (*id_str == ':')
|
|
continue;
|
|
|
|
*ptr = *id_str;
|
|
ptr++;
|
|
}
|
|
|
|
ret = safe_hextou64(s, id);
|
|
free(s);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int
|
|
device_id_find_byname(uint64_t *id, const char *name)
|
|
{
|
|
struct output_device *device;
|
|
struct airplay_extra *re;
|
|
|
|
for (device = outputs_list(); device; device = device->next)
|
|
{
|
|
if (device->type != OUTPUT_TYPE_AIRPLAY)
|
|
continue;
|
|
|
|
re = device->extra_device_info;
|
|
if (strcmp(name, re->mdns_name) == 0)
|
|
break;
|
|
}
|
|
|
|
if (!device)
|
|
return -1;
|
|
|
|
*id = device->id;
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* ------------------------------- Crypto ----------------------------------- */
|
|
|
|
static void
|
|
chacha_close(gcry_cipher_hd_t hd)
|
|
{
|
|
if (!hd)
|
|
return;
|
|
|
|
gcry_cipher_close(hd);
|
|
}
|
|
|
|
static gcry_cipher_hd_t
|
|
chacha_open(const uint8_t *key, size_t key_len)
|
|
{
|
|
gcry_cipher_hd_t hd;
|
|
|
|
if (gcry_cipher_open(&hd, GCRY_CIPHER_CHACHA20, GCRY_CIPHER_MODE_POLY1305, 0) != GPG_ERR_NO_ERROR)
|
|
goto error;
|
|
|
|
if (gcry_cipher_setkey(hd, key, key_len) != GPG_ERR_NO_ERROR)
|
|
goto error;
|
|
|
|
return hd;
|
|
|
|
error:
|
|
chacha_close(hd);
|
|
return NULL;
|
|
}
|
|
|
|
static int
|
|
chacha_encrypt(uint8_t *cipher, uint8_t *plain, size_t plain_len, const void *ad, size_t ad_len, uint8_t *tag, size_t tag_len, uint8_t *nonce, size_t nonce_len, gcry_cipher_hd_t hd)
|
|
{
|
|
if (gcry_cipher_setiv(hd, nonce, nonce_len) != GPG_ERR_NO_ERROR)
|
|
return -1;
|
|
|
|
if (gcry_cipher_authenticate(hd, ad, ad_len) != GPG_ERR_NO_ERROR)
|
|
return -1;
|
|
|
|
if (gcry_cipher_encrypt(hd, cipher, plain_len, plain, plain_len) != GPG_ERR_NO_ERROR)
|
|
return -1;
|
|
|
|
if (gcry_cipher_gettag(hd, tag, tag_len) != GPG_ERR_NO_ERROR)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* --------------------- Helpers for sending RTSP requests ------------------ */
|
|
|
|
// TODO Not sure if the below is still valid for AirPlay 2
|
|
static int
|
|
request_header_auth_add(struct evrtsp_request *req, struct airplay_session *rs, const char *method, const char *uri)
|
|
{
|
|
char ha1[33];
|
|
char ha2[33];
|
|
char ebuf[64];
|
|
char auth[256];
|
|
const char *hash_fmt;
|
|
const char *username;
|
|
uint8_t *hash_bytes;
|
|
size_t hashlen;
|
|
gcry_md_hd_t hd;
|
|
gpg_error_t gc_err;
|
|
int i;
|
|
int ret;
|
|
|
|
rs->req_has_auth = 0;
|
|
|
|
if (!rs->nonce)
|
|
return 0;
|
|
|
|
if (!rs->password)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Authentication required but no password found for device '%s'\n", rs->devname);
|
|
|
|
return -2;
|
|
}
|
|
|
|
hash_fmt = "%02x";
|
|
username = ""; /* No username */
|
|
|
|
gc_err = gcry_md_open(&hd, GCRY_MD_MD5, 0);
|
|
if (gc_err != GPG_ERR_NO_ERROR)
|
|
{
|
|
gpg_strerror_r(gc_err, ebuf, sizeof(ebuf));
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not open MD5: %s\n", ebuf);
|
|
|
|
return -1;
|
|
}
|
|
|
|
memset(ha1, 0, sizeof(ha1));
|
|
memset(ha2, 0, sizeof(ha2));
|
|
hashlen = gcry_md_get_algo_dlen(GCRY_MD_MD5);
|
|
|
|
/* HA 1 */
|
|
|
|
gcry_md_write(hd, username, strlen(username));
|
|
gcry_md_write(hd, ":", 1);
|
|
gcry_md_write(hd, rs->realm, strlen(rs->realm));
|
|
gcry_md_write(hd, ":", 1);
|
|
gcry_md_write(hd, rs->password, strlen(rs->password));
|
|
|
|
hash_bytes = gcry_md_read(hd, GCRY_MD_MD5);
|
|
if (!hash_bytes)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not read MD5 hash\n");
|
|
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < hashlen; i++)
|
|
sprintf(ha1 + (2 * i), hash_fmt, hash_bytes[i]);
|
|
|
|
/* RESET */
|
|
gcry_md_reset(hd);
|
|
|
|
/* HA 2 */
|
|
gcry_md_write(hd, method, strlen(method));
|
|
gcry_md_write(hd, ":", 1);
|
|
gcry_md_write(hd, uri, strlen(uri));
|
|
|
|
hash_bytes = gcry_md_read(hd, GCRY_MD_MD5);
|
|
if (!hash_bytes)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not read MD5 hash\n");
|
|
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < hashlen; i++)
|
|
sprintf(ha2 + (2 * i), hash_fmt, hash_bytes[i]);
|
|
|
|
/* RESET */
|
|
gcry_md_reset(hd);
|
|
|
|
/* Final value */
|
|
gcry_md_write(hd, ha1, 32);
|
|
gcry_md_write(hd, ":", 1);
|
|
gcry_md_write(hd, rs->nonce, strlen(rs->nonce));
|
|
gcry_md_write(hd, ":", 1);
|
|
gcry_md_write(hd, ha2, 32);
|
|
|
|
hash_bytes = gcry_md_read(hd, GCRY_MD_MD5);
|
|
if (!hash_bytes)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not read MD5 hash\n");
|
|
|
|
return -1;
|
|
}
|
|
|
|
for (i = 0; i < hashlen; i++)
|
|
sprintf(ha1 + (2 * i), hash_fmt, hash_bytes[i]);
|
|
|
|
gcry_md_close(hd);
|
|
|
|
/* Build header */
|
|
ret = snprintf(auth, sizeof(auth), "Digest username=\"%s\", realm=\"%s\", nonce=\"%s\", uri=\"%s\", response=\"%s\"",
|
|
username, rs->realm, rs->nonce, uri, ha1);
|
|
if ((ret < 0) || (ret >= sizeof(auth)))
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Authorization value header exceeds buffer size\n");
|
|
|
|
return -1;
|
|
}
|
|
|
|
evrtsp_add_header(req->output_headers, "Authorization", auth);
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Authorization header: %s\n", auth);
|
|
|
|
rs->req_has_auth = 1;
|
|
|
|
return 0;
|
|
}
|
|
/*
|
|
static int
|
|
response_header_auth_parse(struct airplay_session *rs, struct evrtsp_request *req)
|
|
{
|
|
const char *param;
|
|
char *auth;
|
|
char *token;
|
|
char *ptr;
|
|
|
|
if (rs->realm)
|
|
{
|
|
free(rs->realm);
|
|
rs->realm = NULL;
|
|
}
|
|
|
|
if (rs->nonce)
|
|
{
|
|
free(rs->nonce);
|
|
rs->nonce = NULL;
|
|
}
|
|
|
|
param = evrtsp_find_header(req->input_headers, "WWW-Authenticate");
|
|
if (!param)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "WWW-Authenticate header not found\n");
|
|
|
|
return -1;
|
|
}
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "WWW-Authenticate: %s\n", param);
|
|
|
|
if (strncmp(param, "Digest ", strlen("Digest ")) != 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Unsupported authentication method: %s\n", param);
|
|
|
|
return -1;
|
|
}
|
|
|
|
auth = strdup(param);
|
|
if (!auth)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Out of memory for WWW-Authenticate header copy\n");
|
|
|
|
return -1;
|
|
}
|
|
|
|
token = strchr(auth, ' ');
|
|
token++;
|
|
|
|
token = strtok_r(token, " =", &ptr);
|
|
while (token)
|
|
{
|
|
if (strcmp(token, "realm") == 0)
|
|
{
|
|
token = strtok_r(NULL, "=\"", &ptr);
|
|
if (!token)
|
|
break;
|
|
|
|
rs->realm = strdup(token);
|
|
}
|
|
else if (strcmp(token, "nonce") == 0)
|
|
{
|
|
token = strtok_r(NULL, "=\"", &ptr);
|
|
if (!token)
|
|
break;
|
|
|
|
rs->nonce = strdup(token);
|
|
}
|
|
|
|
token = strtok_r(NULL, " =", &ptr);
|
|
}
|
|
|
|
free(auth);
|
|
|
|
if (!rs->realm || !rs->nonce)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not find realm/nonce in WWW-Authenticate header\n");
|
|
|
|
if (rs->realm)
|
|
{
|
|
free(rs->realm);
|
|
rs->realm = NULL;
|
|
}
|
|
|
|
if (rs->nonce)
|
|
{
|
|
free(rs->nonce);
|
|
rs->nonce = NULL;
|
|
}
|
|
|
|
return -1;
|
|
}
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Found realm: [%s], nonce: [%s]\n", rs->realm, rs->nonce);
|
|
|
|
return 0;
|
|
}
|
|
*/
|
|
static int
|
|
request_headers_add(struct evrtsp_request *req, struct airplay_session *rs, enum evrtsp_cmd_type req_method)
|
|
{
|
|
char buf[64];
|
|
const char *method;
|
|
const char *url;
|
|
const char *user_agent;
|
|
int ret;
|
|
|
|
method = evrtsp_method(req_method);
|
|
|
|
snprintf(buf, sizeof(buf), "%d", rs->cseq);
|
|
evrtsp_add_header(req->output_headers, "CSeq", buf);
|
|
|
|
rs->cseq++;
|
|
|
|
user_agent = cfg_getstr(cfg_getsec(cfg, "general"), "user_agent");
|
|
evrtsp_add_header(req->output_headers, "User-Agent", user_agent);
|
|
|
|
/* Add Authorization header */
|
|
url = (req_method == EVRTSP_REQ_OPTIONS) ? "*" : rs->session_url;
|
|
|
|
ret = request_header_auth_add(req, rs, method, url);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not add Authorization header\n");
|
|
|
|
if (ret == -2)
|
|
rs->state = AIRPLAY_STATE_AUTH;
|
|
|
|
return -1;
|
|
}
|
|
|
|
snprintf(buf, sizeof(buf), "%" PRIX64, libhash);
|
|
evrtsp_add_header(req->output_headers, "Client-Instance", buf);
|
|
evrtsp_add_header(req->output_headers, "DACP-ID", buf);
|
|
|
|
// We set Active-Remote as 32 bit unsigned decimal, as at least my device
|
|
// can't handle any larger. Must be aligned with volume_byactiveremote().
|
|
snprintf(buf, sizeof(buf), "%" PRIu32, (uint32_t)rs->device_id);
|
|
evrtsp_add_header(req->output_headers, "Active-Remote", buf);
|
|
|
|
#if AIRPLAY_USE_STREAMID
|
|
evrtsp_add_header(req->output_headers, "X-Apple-StreamID", "1");
|
|
#endif
|
|
|
|
/* Content-Length added automatically by evrtsp */
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
metadata_rtptimes_get(uint32_t *start, uint32_t *display, uint32_t *pos, uint32_t *end, struct airplay_master_session *rms, struct output_metadata *metadata)
|
|
{
|
|
struct rtp_session *rtp_session = rms->rtp_session;
|
|
// All the calculations with long ints to avoid surprises
|
|
int64_t sample_rate;
|
|
int64_t diff_ms;
|
|
int64_t elapsed_ms;
|
|
int64_t elapsed_samples;
|
|
int64_t len_samples;
|
|
|
|
sample_rate = rtp_session->quality.sample_rate;
|
|
|
|
// First calculate the rtptime that streaming of this item started:
|
|
// - at time metadata->pts the elapsed time was metadata->pos_ms
|
|
// - the time is now rms->cur_stamp.ts and the position is rms->cur_stamp.pos
|
|
// -> time since item started is elapsed_ms = metadata->pos_ms + (rms->cur_stamp.ts - metadata->pts)
|
|
// -> start must then be start = rms->cur_stamp.pos - elapsed_ms * sample_rate;
|
|
diff_ms = (rms->cur_stamp.ts.tv_sec - metadata->pts.tv_sec) * 1000L + (rms->cur_stamp.ts.tv_nsec - metadata->pts.tv_nsec) / 1000000L;
|
|
elapsed_ms = (int64_t)metadata->pos_ms + diff_ms;
|
|
elapsed_samples = elapsed_ms * sample_rate / 1000;
|
|
*start = rms->cur_stamp.pos - elapsed_samples;
|
|
|
|
/* DPRINTF(E_DBG, L_AIRPLAY, "pos_ms=%u, len_ms=%u, startup=%d, metadata.pts=%ld.%09ld, player.ts=%ld.%09ld, diff_ms=%" PRIi64 ", elapsed_ms=%" PRIi64 "\n",
|
|
metadata->pos_ms, metadata->len_ms, metadata->startup, metadata->pts.tv_sec, metadata->pts.tv_nsec, rms->cur_stamp.ts.tv_sec, rms->cur_stamp.ts.tv_nsec, diff_ms, elapsed_ms);
|
|
*/
|
|
// Here's the deal with progress values:
|
|
// - display is always start minus a delay
|
|
// -> delay x1 if streaming is starting for this device (joining or not)
|
|
// -> delay x2 if stream is switching to a new song
|
|
// TODO what if we are just sending a keep_alive?
|
|
// - pos is the RTP time of the first sample for this song for this device
|
|
// -> start of song
|
|
// -> start of song + offset if device is joining in the middle of a song,
|
|
// or getting out of a pause or seeking
|
|
// - end is the RTP time of the last sample for this song
|
|
len_samples = (int64_t)metadata->len_ms * sample_rate / 1000;
|
|
*display = metadata->startup ? *start - AIRPLAY_MD_DELAY_STARTUP : *start - AIRPLAY_MD_DELAY_SWITCH;
|
|
*pos = MAX(rms->cur_stamp.pos, *start);
|
|
*end = len_samples ? *start + len_samples : *pos;
|
|
|
|
DPRINTF(E_SPAM, L_AIRPLAY, "start=%u, display=%u, pos=%u, end=%u, rtp_session.pos=%u, cur_stamp.pos=%u\n",
|
|
*start, *display, *pos, *end, rtp_session->pos, rms->cur_stamp.pos);
|
|
}
|
|
|
|
static int
|
|
rtpinfo_header_add(struct evrtsp_request *req, struct airplay_session *rs, struct output_metadata *metadata)
|
|
{
|
|
uint32_t start;
|
|
uint32_t display;
|
|
uint32_t pos;
|
|
uint32_t end;
|
|
char rtpinfo[32];
|
|
int ret;
|
|
|
|
metadata_rtptimes_get(&start, &display, &pos, &end, rs->master_session, metadata);
|
|
|
|
ret = snprintf(rtpinfo, sizeof(rtpinfo), "rtptime=%u", start);
|
|
if ((ret < 0) || (ret >= sizeof(rtpinfo)))
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "RTP-Info too big for buffer while sending metadata\n");
|
|
return -1;
|
|
}
|
|
|
|
evrtsp_add_header(req->output_headers, "RTP-Info", rtpinfo);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
rtsp_cipher(struct evbuffer *outbuf, struct evbuffer *inbuf, void *arg, int encrypt)
|
|
{
|
|
struct airplay_session *rs = arg;
|
|
uint8_t *in;
|
|
size_t in_len;
|
|
uint8_t *out = NULL;
|
|
size_t out_len = 0;
|
|
ssize_t processed;
|
|
|
|
in = evbuffer_pullup(inbuf, -1);
|
|
in_len = evbuffer_get_length(inbuf);
|
|
|
|
if (encrypt)
|
|
{
|
|
#if AIRPLAY_DUMP_TRAFFIC
|
|
if (in_len < 4096)
|
|
DHEXDUMP(E_DBG, L_AIRPLAY, in, in_len, "Encrypting outgoing request\n");
|
|
else
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Encrypting outgoing request (size %zu)\n", in_len);
|
|
#endif
|
|
|
|
processed = pair_encrypt(&out, &out_len, in, in_len, rs->control_cipher_ctx);
|
|
if (processed < 0)
|
|
goto error;
|
|
}
|
|
else
|
|
{
|
|
processed = pair_decrypt(&out, &out_len, in, in_len, rs->control_cipher_ctx);
|
|
if (processed < 0)
|
|
goto error;
|
|
|
|
#if AIRPLAY_DUMP_TRAFFIC
|
|
if (out_len < 4096)
|
|
DHEXDUMP(E_DBG, L_AIRPLAY, out, out_len, "Decrypted incoming response\n");
|
|
else
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Decrypted incoming response (size %zu)\n", out_len);
|
|
#endif
|
|
}
|
|
|
|
evbuffer_drain(inbuf, processed);
|
|
evbuffer_add(outbuf, out, out_len);
|
|
|
|
return 0;
|
|
|
|
error:
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Error while %s (len=%zu): %s\n", encrypt ? "encrypting" : "decrypting", in_len, pair_cipher_errmsg(rs->control_cipher_ctx));
|
|
|
|
return -1;
|
|
}
|
|
|
|
|
|
/* ------------------------------ Session handling -------------------------- */
|
|
|
|
// Maps our internal state to the generic output state and then makes a callback
|
|
// to the player to tell that state
|
|
static void
|
|
session_status(struct airplay_session *rs)
|
|
{
|
|
enum output_device_state state;
|
|
|
|
switch (rs->state)
|
|
{
|
|
case AIRPLAY_STATE_AUTH:
|
|
state = OUTPUT_STATE_PASSWORD;
|
|
break;
|
|
case AIRPLAY_STATE_FAILED:
|
|
state = OUTPUT_STATE_FAILED;
|
|
break;
|
|
case AIRPLAY_STATE_STOPPED:
|
|
state = OUTPUT_STATE_STOPPED;
|
|
break;
|
|
case AIRPLAY_STATE_INFO ... AIRPLAY_STATE_RECORD:
|
|
state = OUTPUT_STATE_STARTUP;
|
|
break;
|
|
case AIRPLAY_STATE_CONNECTED:
|
|
state = OUTPUT_STATE_CONNECTED;
|
|
break;
|
|
case AIRPLAY_STATE_STREAMING:
|
|
state = OUTPUT_STATE_STREAMING;
|
|
break;
|
|
case AIRPLAY_STATE_TEARDOWN:
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Bug! session_status() called with transitional state (TEARDOWN)\n");
|
|
state = OUTPUT_STATE_STOPPED;
|
|
break;
|
|
default:
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Bug! Unhandled state in session_status(): %d\n", rs->state);
|
|
state = OUTPUT_STATE_FAILED;
|
|
}
|
|
|
|
outputs_cb(rs->callback_id, rs->device_id, state);
|
|
rs->callback_id = -1;
|
|
}
|
|
|
|
static void
|
|
master_session_free(struct airplay_master_session *rms)
|
|
{
|
|
if (!rms)
|
|
return;
|
|
|
|
outputs_quality_unsubscribe(&rms->rtp_session->quality);
|
|
rtp_session_free(rms->rtp_session);
|
|
|
|
transcode_encode_cleanup(&rms->encode_ctx);
|
|
|
|
if (rms->input_buffer)
|
|
evbuffer_free(rms->input_buffer);
|
|
if (rms->encoded_buffer)
|
|
evbuffer_free(rms->encoded_buffer);
|
|
|
|
free(rms->rawbuf);
|
|
free(rms);
|
|
}
|
|
|
|
static void
|
|
master_session_cleanup(struct airplay_master_session *rms)
|
|
{
|
|
struct airplay_master_session *s;
|
|
struct airplay_session *rs;
|
|
|
|
// First check if any other session is using the master session
|
|
for (rs = airplay_sessions; rs; rs=rs->next)
|
|
{
|
|
if (rs->master_session == rms)
|
|
return;
|
|
}
|
|
|
|
if (rms == airplay_master_sessions)
|
|
airplay_master_sessions = airplay_master_sessions->next;
|
|
else
|
|
{
|
|
for (s = airplay_master_sessions; s && (s->next != rms); s = s->next)
|
|
; /* EMPTY */
|
|
|
|
if (!s)
|
|
DPRINTF(E_WARN, L_AIRPLAY, "WARNING: struct airplay_master_session not found in list; BUG!\n");
|
|
else
|
|
s->next = rms->next;
|
|
}
|
|
|
|
master_session_free(rms);
|
|
}
|
|
|
|
static struct airplay_master_session *
|
|
master_session_make(struct media_quality *quality)
|
|
{
|
|
struct airplay_master_session *rms;
|
|
struct decode_ctx *decode_ctx;
|
|
int ret;
|
|
|
|
// First check if we already have a suitable session
|
|
for (rms = airplay_master_sessions; rms; rms = rms->next)
|
|
{
|
|
if (quality_is_equal(quality, &rms->rtp_session->quality))
|
|
return rms;
|
|
}
|
|
|
|
// Let's create a master session
|
|
ret = outputs_quality_subscribe(quality);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not subscribe to required audio quality (%d/%d/%d)\n", quality->sample_rate, quality->bits_per_sample, quality->channels);
|
|
return NULL;
|
|
}
|
|
|
|
CHECK_NULL(L_AIRPLAY, rms = calloc(1, sizeof(struct airplay_master_session)));
|
|
|
|
rms->rtp_session = rtp_session_new(quality, AIRPLAY_PACKET_BUFFER_SIZE, 0);
|
|
if (!rms->rtp_session)
|
|
{
|
|
goto error;
|
|
}
|
|
|
|
decode_ctx = transcode_decode_setup_raw(XCODE_PCM16, quality);
|
|
if (!decode_ctx)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not create decoding context\n");
|
|
goto error;
|
|
}
|
|
|
|
rms->encode_ctx = transcode_encode_setup(XCODE_ALAC, quality, decode_ctx, NULL, 0, 0);
|
|
transcode_decode_cleanup(&decode_ctx);
|
|
if (!rms->encode_ctx)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Will not be able to stream AirPlay 2, ffmpeg has no ALAC encoder\n");
|
|
goto error;
|
|
}
|
|
|
|
rms->quality = *quality;
|
|
rms->samples_per_packet = AIRPLAY_SAMPLES_PER_PACKET;
|
|
rms->rawbuf_size = STOB(rms->samples_per_packet, quality->bits_per_sample, quality->channels);
|
|
rms->output_buffer_samples = OUTPUTS_BUFFER_DURATION * quality->sample_rate;
|
|
|
|
CHECK_NULL(L_AIRPLAY, rms->rawbuf = malloc(rms->rawbuf_size));
|
|
CHECK_NULL(L_AIRPLAY, rms->input_buffer = evbuffer_new());
|
|
CHECK_NULL(L_AIRPLAY, rms->encoded_buffer = evbuffer_new());
|
|
|
|
rms->next = airplay_master_sessions;
|
|
airplay_master_sessions = rms;
|
|
|
|
return rms;
|
|
|
|
error:
|
|
master_session_free(rms);
|
|
return NULL;
|
|
}
|
|
|
|
static void
|
|
session_free(struct airplay_session *rs)
|
|
{
|
|
if (!rs)
|
|
return;
|
|
|
|
if (rs->master_session)
|
|
master_session_cleanup(rs->master_session);
|
|
|
|
if (rs->ctrl)
|
|
{
|
|
evrtsp_connection_set_closecb(rs->ctrl, NULL, NULL);
|
|
evrtsp_connection_free(rs->ctrl);
|
|
}
|
|
|
|
if (rs->deferredev)
|
|
event_free(rs->deferredev);
|
|
|
|
if (rs->server_fd >= 0)
|
|
close(rs->server_fd);
|
|
|
|
chacha_close(rs->packet_cipher_hd);
|
|
|
|
pair_setup_free(rs->pair_setup_ctx);
|
|
pair_verify_free(rs->pair_verify_ctx);
|
|
pair_cipher_free(rs->control_cipher_ctx);
|
|
|
|
free(rs->local_address);
|
|
free(rs->realm);
|
|
free(rs->nonce);
|
|
free(rs->address);
|
|
free(rs->devname);
|
|
|
|
free(rs);
|
|
}
|
|
|
|
static void
|
|
session_cleanup(struct airplay_session *rs)
|
|
{
|
|
struct airplay_session *s;
|
|
|
|
if (rs == airplay_sessions)
|
|
airplay_sessions = airplay_sessions->next;
|
|
else
|
|
{
|
|
for (s = airplay_sessions; s && (s->next != rs); s = s->next)
|
|
; /* EMPTY */
|
|
|
|
if (!s)
|
|
DPRINTF(E_WARN, L_AIRPLAY, "WARNING: struct airplay_session not found in list; BUG!\n");
|
|
else
|
|
s->next = rs->next;
|
|
}
|
|
|
|
outputs_device_session_remove(rs->device_id);
|
|
|
|
session_free(rs);
|
|
}
|
|
|
|
static void
|
|
session_failure(struct airplay_session *rs)
|
|
{
|
|
/* Session failed, let our user know */
|
|
if (rs->state != AIRPLAY_STATE_AUTH)
|
|
rs->state = AIRPLAY_STATE_FAILED;
|
|
|
|
session_status(rs);
|
|
|
|
session_cleanup(rs);
|
|
}
|
|
|
|
static void
|
|
deferred_session_failure_cb(int fd, short what, void *arg)
|
|
{
|
|
struct airplay_session *rs = arg;
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Cleaning up failed session (deferred) on device '%s'\n", rs->devname);
|
|
session_failure(rs);
|
|
}
|
|
|
|
static void
|
|
deferred_session_failure(struct airplay_session *rs)
|
|
{
|
|
struct timeval tv;
|
|
|
|
if (rs->state != AIRPLAY_STATE_AUTH)
|
|
rs->state = AIRPLAY_STATE_FAILED;
|
|
|
|
evutil_timerclear(&tv);
|
|
evtimer_add(rs->deferredev, &tv);
|
|
}
|
|
|
|
static void
|
|
rtsp_close_cb(struct evrtsp_connection *evcon, void *arg)
|
|
{
|
|
struct airplay_session *rs = arg;
|
|
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Device '%s' closed RTSP connection\n", rs->devname);
|
|
|
|
deferred_session_failure(rs);
|
|
}
|
|
|
|
static void
|
|
session_success(struct airplay_session *rs)
|
|
{
|
|
session_status(rs);
|
|
|
|
session_cleanup(rs);
|
|
}
|
|
|
|
static void
|
|
session_connected(struct airplay_session *rs)
|
|
{
|
|
rs->state = AIRPLAY_STATE_CONNECTED;
|
|
|
|
session_status(rs);
|
|
}
|
|
|
|
static void
|
|
session_pair_success(struct airplay_session *rs)
|
|
{
|
|
if (rs->next_seq != AIRPLAY_SEQ_CONTINUE)
|
|
{
|
|
sequence_start(rs->next_seq, rs, NULL, "pair_success");
|
|
rs->next_seq = AIRPLAY_SEQ_CONTINUE;
|
|
return;
|
|
}
|
|
|
|
session_success(rs);
|
|
}
|
|
|
|
static int
|
|
session_connection_setup(struct airplay_session *rs, struct output_device *rd, int family)
|
|
{
|
|
char *address;
|
|
char *intf;
|
|
unsigned short port;
|
|
int ret;
|
|
|
|
rs->naddr.ss.ss_family = family;
|
|
|
|
switch (family)
|
|
{
|
|
case AF_INET:
|
|
if (!rd->v4_address)
|
|
return -1;
|
|
|
|
address = rd->v4_address;
|
|
port = rd->v4_port;
|
|
|
|
|
|
ret = inet_pton(AF_INET, address, &rs->naddr.sin.sin_addr);
|
|
break;
|
|
|
|
case AF_INET6:
|
|
if (!rd->v6_address)
|
|
return -1;
|
|
|
|
address = rd->v6_address;
|
|
port = rd->v6_port;
|
|
|
|
intf = strchr(address, '%');
|
|
if (intf)
|
|
*intf = '\0';
|
|
|
|
ret = inet_pton(AF_INET6, address, &rs->naddr.sin6.sin6_addr);
|
|
|
|
if (intf)
|
|
{
|
|
*intf = '%';
|
|
|
|
intf++;
|
|
|
|
rs->naddr.sin6.sin6_scope_id = if_nametoindex(intf);
|
|
if (rs->naddr.sin6.sin6_scope_id == 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not find interface %s\n", intf);
|
|
|
|
ret = -1;
|
|
break;
|
|
}
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
return -1;
|
|
}
|
|
|
|
if (ret <= 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Device '%s' has invalid address (%s) for %s\n", rd->name, address, (family == AF_INET) ? "ipv4" : "ipv6");
|
|
return -1;
|
|
}
|
|
|
|
rs->ctrl = evrtsp_connection_new(address, port);
|
|
if (!rs->ctrl)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not create control connection to '%s' (%s)\n", rd->name, address);
|
|
return -1;
|
|
}
|
|
|
|
evrtsp_connection_set_base(rs->ctrl, evbase_player);
|
|
|
|
rs->address = strdup(address);
|
|
rs->family = family;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
session_cipher_setup(struct airplay_session *rs, const uint8_t *key, size_t key_len)
|
|
{
|
|
struct pair_cipher_context *control_cipher_ctx = NULL;
|
|
gcry_cipher_hd_t packet_cipher_hd = NULL;
|
|
|
|
// For transient pairing the key_len will be 64 bytes, and rs->shared_secret is 32 bytes
|
|
if (key_len < AIRPLAY_AUDIO_KEY_LEN || key_len > sizeof(rs->shared_secret))
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Ciphering setup error: Unexpected key length (%zu)\n", key_len);
|
|
goto error;
|
|
}
|
|
|
|
rs->shared_secret_len = key_len;
|
|
memcpy(rs->shared_secret, key, key_len);
|
|
|
|
control_cipher_ctx = pair_cipher_new(rs->pair_type, 0, key, key_len);
|
|
if (!control_cipher_ctx)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not create control ciphering context\n");
|
|
goto error;
|
|
}
|
|
|
|
packet_cipher_hd = chacha_open(rs->shared_secret, AIRPLAY_AUDIO_KEY_LEN);
|
|
if (!packet_cipher_hd)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not create packet ciphering handle\n");
|
|
goto error;
|
|
}
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Ciphering setup of '%s' completed succesfully, now using encrypted mode\n", rs->devname);
|
|
|
|
rs->state = AIRPLAY_STATE_ENCRYPTED;
|
|
rs->control_cipher_ctx = control_cipher_ctx;
|
|
rs->packet_cipher_hd = packet_cipher_hd;
|
|
|
|
evrtsp_connection_set_ciphercb(rs->ctrl, rtsp_cipher, rs);
|
|
|
|
return 0;
|
|
|
|
error:
|
|
pair_cipher_free(control_cipher_ctx);
|
|
chacha_close(packet_cipher_hd);
|
|
return -1;
|
|
}
|
|
|
|
static int
|
|
session_ids_set(struct airplay_session *rs)
|
|
{
|
|
char *address = NULL;
|
|
char *intf;
|
|
unsigned short port;
|
|
int family;
|
|
int ret;
|
|
|
|
// Determine local address, needed for session URL
|
|
evrtsp_connection_get_local_address(rs->ctrl, &address, &port, &family);
|
|
if (!address || (port == 0))
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not determine local address\n");
|
|
goto error;
|
|
}
|
|
|
|
intf = strchr(address, '%');
|
|
if (intf)
|
|
{
|
|
*intf = '\0';
|
|
intf++;
|
|
}
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Local address: %s (LL: %s) port %d\n", address, (intf) ? intf : "no", port);
|
|
|
|
// Session UUID, ID and session URL
|
|
uuid_make(rs->session_uuid);
|
|
|
|
gcry_randomize(&rs->session_id, sizeof(rs->session_id), GCRY_STRONG_RANDOM);
|
|
|
|
if (family == AF_INET)
|
|
ret = snprintf(rs->session_url, sizeof(rs->session_url), "rtsp://%s/%u", address, rs->session_id);
|
|
else
|
|
ret = snprintf(rs->session_url, sizeof(rs->session_url), "rtsp://[%s]/%u", address, rs->session_id);
|
|
if ((ret < 0) || (ret >= sizeof(rs->session_url)))
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Session URL length exceeds 127 characters\n");
|
|
goto error;
|
|
}
|
|
|
|
rs->local_address = address;
|
|
return 0;
|
|
|
|
error:
|
|
free(address);
|
|
return -1;
|
|
}
|
|
|
|
static struct airplay_session *
|
|
session_find_by_address(union net_sockaddr *peer_addr)
|
|
{
|
|
struct airplay_session *rs;
|
|
uint32_t *addr_ptr;
|
|
int family = peer_addr->sa.sa_family;
|
|
|
|
for (rs = airplay_sessions; rs; rs = rs->next)
|
|
{
|
|
if (family == rs->family)
|
|
{
|
|
if (family == AF_INET && peer_addr->sin.sin_addr.s_addr == rs->naddr.sin.sin_addr.s_addr)
|
|
break;
|
|
|
|
if (family == AF_INET6 && IN6_ARE_ADDR_EQUAL(&peer_addr->sin6.sin6_addr, &rs->naddr.sin6.sin6_addr))
|
|
break;
|
|
}
|
|
else if (family == AF_INET6 && IN6_IS_ADDR_V4MAPPED(&peer_addr->sin6.sin6_addr))
|
|
{
|
|
// ipv4 mapped to ipv6 consists of 16 bytes/4 words: 0x00000000 0x00000000 0x0000ffff 0x[IPv4]
|
|
addr_ptr = (uint32_t *)(&peer_addr->sin6.sin6_addr);
|
|
if (addr_ptr[3] == rs->naddr.sin.sin_addr.s_addr)
|
|
break;
|
|
}
|
|
}
|
|
|
|
return rs;
|
|
}
|
|
|
|
static struct airplay_session *
|
|
session_make(struct output_device *rd, int callback_id)
|
|
{
|
|
struct airplay_session *rs;
|
|
struct airplay_extra *re;
|
|
int ret;
|
|
|
|
re = rd->extra_device_info;
|
|
|
|
|
|
CHECK_NULL(L_AIRPLAY, rs = calloc(1, sizeof(struct airplay_session)));
|
|
CHECK_NULL(L_AIRPLAY, rs->deferredev = evtimer_new(evbase_player, deferred_session_failure_cb, rs));
|
|
|
|
rs->devname = strdup(rd->name);
|
|
rs->volume = rd->volume;
|
|
|
|
rs->state = AIRPLAY_STATE_STOPPED;
|
|
rs->reqs_in_flight = 0;
|
|
rs->cseq = 1;
|
|
|
|
rs->device_id = rd->id;
|
|
rs->callback_id = callback_id;
|
|
|
|
rs->server_fd = -1;
|
|
|
|
rs->password = rd->password;
|
|
|
|
rs->supports_auth_setup = re->supports_auth_setup;
|
|
rs->wanted_metadata = re->wanted_metadata;
|
|
|
|
rs->next_seq = AIRPLAY_SEQ_CONTINUE;
|
|
|
|
rs->timing_svc = &airplay_timing_svc;
|
|
rs->control_svc = &airplay_control_svc;
|
|
|
|
ret = session_connection_setup(rs, rd, AF_INET6);
|
|
if (ret < 0)
|
|
{
|
|
ret = session_connection_setup(rs, rd, AF_INET);
|
|
if (ret < 0)
|
|
goto error;
|
|
}
|
|
|
|
rs->master_session = master_session_make(&rd->quality);
|
|
if (!rs->master_session)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not attach a master session for device '%s'\n", rd->name);
|
|
goto error;
|
|
}
|
|
|
|
// Attach to list of sessions
|
|
rs->next = airplay_sessions;
|
|
airplay_sessions = rs;
|
|
|
|
// rs is now the official device session
|
|
outputs_device_session_add(rd->id, rs);
|
|
|
|
return rs;
|
|
|
|
error:
|
|
session_free(rs);
|
|
|
|
return NULL;
|
|
}
|
|
|
|
|
|
/* ----------------------------- Metadata handling -------------------------- */
|
|
|
|
static void
|
|
airplay_metadata_free(struct airplay_metadata *rmd)
|
|
{
|
|
if (!rmd)
|
|
return;
|
|
|
|
if (rmd->metadata)
|
|
evbuffer_free(rmd->metadata);
|
|
if (rmd->artwork)
|
|
evbuffer_free(rmd->artwork);
|
|
|
|
free(rmd);
|
|
}
|
|
|
|
static void
|
|
airplay_metadata_purge(void)
|
|
{
|
|
if (!airplay_cur_metadata)
|
|
return;
|
|
|
|
airplay_metadata_free(airplay_cur_metadata->priv);
|
|
free(airplay_cur_metadata);
|
|
airplay_cur_metadata = NULL;
|
|
}
|
|
|
|
// *** Thread: worker ***
|
|
static void *
|
|
airplay_metadata_prepare(struct output_metadata *metadata)
|
|
{
|
|
struct db_queue_item *queue_item;
|
|
struct airplay_metadata *rmd;
|
|
struct evbuffer *tmp;
|
|
int ret;
|
|
|
|
queue_item = db_queue_fetch_byitemid(metadata->item_id);
|
|
if (!queue_item)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not fetch queue item\n");
|
|
return NULL;
|
|
}
|
|
|
|
CHECK_NULL(L_AIRPLAY, rmd = calloc(1, sizeof(struct airplay_metadata)));
|
|
CHECK_NULL(L_AIRPLAY, rmd->artwork = evbuffer_new());
|
|
CHECK_NULL(L_AIRPLAY, rmd->metadata = evbuffer_new());
|
|
CHECK_NULL(L_AIRPLAY, tmp = evbuffer_new());
|
|
|
|
ret = artwork_get_item(rmd->artwork, queue_item->file_id, ART_DEFAULT_WIDTH, ART_DEFAULT_HEIGHT, 0);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_INFO, L_AIRPLAY, "Failed to retrieve artwork for file '%s'; no artwork will be sent\n", queue_item->path);
|
|
evbuffer_free(rmd->artwork);
|
|
rmd->artwork = NULL;
|
|
}
|
|
|
|
rmd->artwork_fmt = ret;
|
|
|
|
ret = dmap_encode_queue_metadata(rmd->metadata, tmp, queue_item);
|
|
evbuffer_free(tmp);
|
|
free_queue_item(queue_item, 0);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not encode file metadata; metadata will not be sent\n");
|
|
airplay_metadata_free(rmd);
|
|
return NULL;
|
|
}
|
|
|
|
return rmd;
|
|
}
|
|
|
|
static int
|
|
airplay_metadata_send_generic(struct airplay_session *rs, struct output_metadata *metadata, bool only_progress)
|
|
{
|
|
struct airplay_metadata *rmd = metadata->priv;
|
|
|
|
if (rs->wanted_metadata & AIRPLAY_MD_WANTS_PROGRESS)
|
|
sequence_start(AIRPLAY_SEQ_SEND_PROGRESS, rs, metadata, "SET_PARAMETER (progress)");
|
|
|
|
if (!only_progress && (rs->wanted_metadata & AIRPLAY_MD_WANTS_TEXT))
|
|
sequence_start(AIRPLAY_SEQ_SEND_TEXT, rs, metadata, "SET_PARAMETER (text)");
|
|
|
|
if (!only_progress && (rs->wanted_metadata & AIRPLAY_MD_WANTS_ARTWORK) && rmd->artwork)
|
|
sequence_start(AIRPLAY_SEQ_SEND_ARTWORK, rs, metadata, "SET_PARAMETER (artwork)");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
airplay_metadata_startup_send(struct airplay_session *rs)
|
|
{
|
|
if (!rs->wanted_metadata || !airplay_cur_metadata)
|
|
return 0;
|
|
|
|
airplay_cur_metadata->startup = true;
|
|
|
|
return airplay_metadata_send_generic(rs, airplay_cur_metadata, false);
|
|
}
|
|
|
|
static void
|
|
airplay_metadata_keep_alive_send(struct airplay_session *rs)
|
|
{
|
|
sequence_start(AIRPLAY_SEQ_FEEDBACK, rs, NULL, "keep_alive");
|
|
}
|
|
|
|
static void
|
|
airplay_metadata_send(struct output_metadata *metadata)
|
|
{
|
|
struct airplay_session *rs;
|
|
struct airplay_session *next;
|
|
int ret;
|
|
|
|
for (rs = airplay_sessions; rs; rs = next)
|
|
{
|
|
next = rs->next;
|
|
|
|
if (!(rs->state & AIRPLAY_STATE_F_CONNECTED) || !rs->wanted_metadata)
|
|
continue;
|
|
|
|
ret = airplay_metadata_send_generic(rs, metadata, false);
|
|
if (ret < 0)
|
|
{
|
|
session_failure(rs);
|
|
continue;
|
|
}
|
|
}
|
|
|
|
// Replace current metadata with the new stuff
|
|
airplay_metadata_purge();
|
|
airplay_cur_metadata = metadata;
|
|
}
|
|
|
|
|
|
/* ------------------------------ Volume handling --------------------------- */
|
|
|
|
static int
|
|
volume_max_get(const char *name)
|
|
{
|
|
int max_volume = AIRPLAY_CONFIG_MAX_VOLUME;
|
|
cfg_t *airplay;
|
|
|
|
airplay = cfg_gettsec(cfg, "airplay", name);
|
|
if (airplay)
|
|
max_volume = cfg_getint(airplay, "max_volume");
|
|
|
|
if ((max_volume < 1) || (max_volume > AIRPLAY_CONFIG_MAX_VOLUME))
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Config has bad max_volume (%d) for device '%s', using default instead\n", max_volume, name);
|
|
return AIRPLAY_CONFIG_MAX_VOLUME;
|
|
}
|
|
|
|
return max_volume;
|
|
}
|
|
|
|
static float
|
|
airplay_volume_from_pct(int volume, const char *name)
|
|
{
|
|
float airplay_volume;
|
|
int max_volume;
|
|
|
|
max_volume = volume_max_get(name);
|
|
|
|
/* RAOP volume
|
|
* -144.0 is off (not really used since we have no concept of muted/off)
|
|
* 0 - 100 maps to -30.0 - 0 (if no max_volume set)
|
|
*/
|
|
if (volume >= 0 && volume <= 100)
|
|
airplay_volume = -30.0 + ((float)max_volume * (float)volume * 30.0) / (100.0 * AIRPLAY_CONFIG_MAX_VOLUME);
|
|
else
|
|
airplay_volume = -144.0;
|
|
|
|
return airplay_volume;
|
|
}
|
|
|
|
static int
|
|
airplay_volume_to_pct(struct output_device *rd, const char *volstr)
|
|
{
|
|
float airplay_volume;
|
|
float volume;
|
|
int max_volume;
|
|
|
|
airplay_volume = atof(volstr);
|
|
|
|
if ((airplay_volume == 0.0 && volstr[0] != '0') || airplay_volume > 0.0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "AirPlay device volume is invalid: '%s'\n", volstr);
|
|
return -1;
|
|
}
|
|
|
|
if (airplay_volume <= -30.0)
|
|
{
|
|
return 0; // -144.0 is muted
|
|
}
|
|
|
|
max_volume = volume_max_get(rd->name);
|
|
|
|
/*
|
|
This is an attempt at scaling the input volume that didn't really work for all
|
|
speakers (e.g. my Sony), but I'm leaving it here in case it should be a config
|
|
option some time
|
|
|
|
// If the input volume is -25 and we are playing at -20, then we only want the
|
|
// resulting volume to be -25 if there is no volume scaling. If the scaling is
|
|
// set to say 20% then we want the resulting volume to be -21, i.e. 20% of the
|
|
// change. Expressed as an equation:
|
|
// a_r = a_0 + m/M * (a_i - a_0) - where a_0 is the current airplay volume, a_i is the input and a_r is the scaled result
|
|
//
|
|
// Since current volume (rd->volume) is measured on the 0-100 scale, and the
|
|
// result of this func should also be on that scale, we have the following two
|
|
// relationships (the first is also found in _from_pct() above):
|
|
// a_0 = -30 + m/M * 30/100 * v_0 - where v_0 is rd->volume
|
|
// v_r = M/m * 100 * (1 + a_r / 30) - converts a_r to v_r which is [0-100]
|
|
//
|
|
// Solving these three equations gives this:
|
|
volume_base = 100.0 * (1.0 + airplay_volume / 30.0);
|
|
volume = (float)rd->volume * (1.0 - (float)max_volume/AIRPLAY_CONFIG_MAX_VOLUME) + volume_base;
|
|
|
|
*/
|
|
// RAOP volume: -144.0 is off, -30.0 - 0 scaled by max_volume maps to 0 - 100
|
|
volume = (100.0 * (airplay_volume / 30.0 + 1.0) * AIRPLAY_CONFIG_MAX_VOLUME / (float)max_volume);
|
|
return MAX(0, MIN(100, (int)volume));
|
|
}
|
|
|
|
/* Volume in [0 - 100] */
|
|
static int
|
|
airplay_set_volume_one(struct output_device *device, int callback_id)
|
|
{
|
|
struct airplay_session *rs = device->session;
|
|
|
|
if (!rs || !(rs->state & AIRPLAY_STATE_F_CONNECTED))
|
|
return 0;
|
|
|
|
rs->volume = device->volume;
|
|
rs->callback_id = callback_id;
|
|
|
|
sequence_start(AIRPLAY_SEQ_SEND_VOLUME, rs, NULL, "set_volume_one");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
airplay_keep_alive_timer_cb(int fd, short what, void *arg)
|
|
{
|
|
struct airplay_session *rs;
|
|
|
|
if (!airplay_sessions)
|
|
{
|
|
event_del(keep_alive_timer);
|
|
return;
|
|
}
|
|
|
|
for (rs = airplay_sessions; rs; rs = rs->next)
|
|
{
|
|
if (!(rs->state & AIRPLAY_STATE_F_CONNECTED))
|
|
continue;
|
|
|
|
airplay_metadata_keep_alive_send(rs);
|
|
}
|
|
|
|
evtimer_add(keep_alive_timer, &keep_alive_tv);
|
|
}
|
|
|
|
|
|
/* -------------------- Creation and sending of RTP packets ---------------- */
|
|
|
|
static int
|
|
packet_encrypt(uint8_t **out, size_t *out_len, struct rtp_packet *pkt, struct airplay_session *rs)
|
|
{
|
|
uint8_t authtag[16];
|
|
uint8_t nonce[12] = { 0 };
|
|
int nonce_offset = 4;
|
|
uint8_t *write_ptr;
|
|
int ret;
|
|
|
|
// Alloc so authtag and nonce can be appended
|
|
*out_len = pkt->data_len + sizeof(authtag) + sizeof(nonce) - nonce_offset;
|
|
*out = malloc(*out_len);
|
|
write_ptr = *out;
|
|
|
|
// Using seqnum as nonce not very secure, but means that when we resend
|
|
// packets they will be identical to the original
|
|
memcpy(nonce + nonce_offset, &pkt->seqnum, sizeof(pkt->seqnum));
|
|
|
|
// The RTP header is not encrypted
|
|
memcpy(write_ptr, pkt->header, pkt->header_len);
|
|
write_ptr = *out + pkt->header_len;
|
|
|
|
// Timestamp and SSRC are used as AAD = pkt->header + 4, len 8
|
|
ret = chacha_encrypt(write_ptr, pkt->payload, pkt->payload_len, pkt->header + 4, 8, authtag, sizeof(authtag), nonce, sizeof(nonce), rs->packet_cipher_hd);
|
|
if (ret < 0)
|
|
{
|
|
free(*out);
|
|
return -1;
|
|
}
|
|
|
|
write_ptr += pkt->payload_len;
|
|
memcpy(write_ptr, authtag, sizeof(authtag));
|
|
write_ptr += sizeof(authtag);
|
|
memcpy(write_ptr, nonce + nonce_offset, sizeof(nonce) - nonce_offset);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
packet_send(struct airplay_session *rs, struct rtp_packet *pkt)
|
|
{
|
|
uint8_t *encrypted;
|
|
size_t encrypted_len;
|
|
int ret;
|
|
|
|
if (!rs)
|
|
return -1;
|
|
|
|
ret = packet_encrypt(&encrypted, &encrypted_len, pkt, rs);
|
|
if (ret < 0)
|
|
return -1;
|
|
|
|
ret = send(rs->server_fd, encrypted, encrypted_len, 0);
|
|
free(encrypted);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Send error for '%s': %s\n", rs->devname, strerror(errno));
|
|
|
|
// Can't free it right away, it would make the ->next in the calling
|
|
// master_session and session loops invalid
|
|
deferred_session_failure(rs);
|
|
return -1;
|
|
}
|
|
else if (ret != encrypted_len)
|
|
{
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Partial send (%d) for '%s'\n", ret, rs->devname);
|
|
return -1;
|
|
}
|
|
|
|
/* DPRINTF(E_DBG, L_AIRPLAY, "RTP PACKET seqnum %u, rtptime %u, payload 0x%x, pktbuf_s %zu\n",
|
|
rs->master_session->rtp_session->seqnum,
|
|
rs->master_session->rtp_session->pos,
|
|
pkt->header[1],
|
|
rs->master_session->rtp_session->pktbuf_len
|
|
);
|
|
*/
|
|
return 0;
|
|
}
|
|
|
|
static void
|
|
control_packet_send(struct airplay_session *rs, struct rtp_packet *pkt)
|
|
{
|
|
socklen_t addrlen;
|
|
int ret;
|
|
|
|
switch (rs->family)
|
|
{
|
|
case AF_INET:
|
|
rs->naddr.sin.sin_port = htons(rs->control_port);
|
|
addrlen = sizeof(rs->naddr.sin);
|
|
break;
|
|
|
|
case AF_INET6:
|
|
rs->naddr.sin6.sin6_port = htons(rs->control_port);
|
|
addrlen = sizeof(rs->naddr.sin6);
|
|
break;
|
|
|
|
default:
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Unknown family %d\n", rs->family);
|
|
return;
|
|
}
|
|
|
|
ret = sendto(rs->control_svc->fd, pkt->data, pkt->data_len, 0, &rs->naddr.sa, addrlen);
|
|
if (ret < 0)
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not send playback sync to device '%s': %s\n", rs->devname, strerror(errno));
|
|
}
|
|
|
|
static void
|
|
packets_resend(struct airplay_session *rs, uint16_t seqnum, int len)
|
|
{
|
|
struct rtp_session *rtp_session;
|
|
struct rtp_packet *pkt;
|
|
uint16_t s;
|
|
int i;
|
|
bool pkt_missing = false;
|
|
|
|
rtp_session = rs->master_session->rtp_session;
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Got retransmit request from '%s': seqnum %" PRIu16 " (len %d), last RTP session seqnum %" PRIu16 " (len %zu)\n",
|
|
rs->devname, seqnum, len, rtp_session->seqnum - 1, rtp_session->pktbuf_len);
|
|
|
|
// Note that seqnum may wrap around, so we don't use it for counting
|
|
for (i = 0, s = seqnum; i < len; i++, s++)
|
|
{
|
|
pkt = rtp_packet_get(rtp_session, s);
|
|
if (pkt)
|
|
packet_send(rs, pkt);
|
|
else
|
|
pkt_missing = true;
|
|
}
|
|
|
|
if (pkt_missing)
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Device '%s' retransmit request for seqnum %" PRIu16 " (len %d) is outside buffer range (last seqnum %" PRIu16 ", len %zu)\n",
|
|
rs->devname, seqnum, len, rtp_session->seqnum - 1, rtp_session->pktbuf_len);
|
|
}
|
|
|
|
static int
|
|
packets_send(struct airplay_master_session *rms)
|
|
{
|
|
struct rtp_packet *pkt;
|
|
struct airplay_session *rs;
|
|
int len;
|
|
|
|
len = alac_encode(rms->encoded_buffer, rms->encode_ctx, rms->rawbuf, rms->rawbuf_size, rms->samples_per_packet, &rms->quality);
|
|
if (len < 0)
|
|
return -1;
|
|
|
|
pkt = rtp_packet_next(rms->rtp_session, len, rms->samples_per_packet, AIRPLAY_RTP_PAYLOADTYPE, 0);
|
|
|
|
evbuffer_remove(rms->encoded_buffer, pkt->payload, pkt->payload_len);
|
|
|
|
for (rs = airplay_sessions; rs; rs = rs->next)
|
|
{
|
|
if (rs->master_session != rms)
|
|
continue;
|
|
|
|
// Device just joined
|
|
if (rs->state == AIRPLAY_STATE_CONNECTED)
|
|
{
|
|
pkt->header[1] = (1 << 7) | AIRPLAY_RTP_PAYLOADTYPE;
|
|
packet_send(rs, pkt);
|
|
}
|
|
else if (rs->state == AIRPLAY_STATE_STREAMING)
|
|
{
|
|
pkt->header[1] = AIRPLAY_RTP_PAYLOADTYPE;
|
|
packet_send(rs, pkt);
|
|
}
|
|
}
|
|
|
|
// Commits packet to retransmit buffer, and prepares the session for the next packet
|
|
rtp_packet_commit(rms->rtp_session, pkt);
|
|
|
|
return 0;
|
|
}
|
|
|
|
// Overview of rtptimes as they should be when starting a stream, and assuming
|
|
// the first rtptime (pos) is 88200:
|
|
// sync pkt: cur_pos = 0, rtptime = 88200
|
|
// audio pkt: rtptime = 88200
|
|
// RECORD: rtptime = 88200
|
|
// SET_PARAMETER text/artwork:
|
|
// rtptime = 88200
|
|
// SET_PARAMETER progress:
|
|
// progress = 72840/~88200/[len]
|
|
static inline void
|
|
timestamp_set(struct airplay_master_session *rms, struct timespec ts)
|
|
{
|
|
// The last write from the player had a timestamp which has been passed to
|
|
// this function as ts. This is the player clock, which is more precise than
|
|
// the actual clock because it gives us a calculated time reference, which is
|
|
// independent of how busy the thread is. We save that here, we need this for
|
|
// reference when sending sync packets and progress.
|
|
rms->cur_stamp.ts = ts;
|
|
|
|
// So what rtptime should be playing, i.e. coming out of the speaker, at time
|
|
// ts (which is normally "now")? Let's calculate by example:
|
|
// - we started playback with a rtptime (pos) of X
|
|
// - up until time ts we have received a 1000 samples from the player
|
|
// - rms->output_buffer_samples is configured to 400 samples
|
|
// -> we should be playing rtptime X + 600
|
|
//
|
|
// So how do we measure samples received from player? We know that from the
|
|
// pos, which says how much has been sent to the device, and from rms->input_buffer,
|
|
// which is the unsent stuff being buffered:
|
|
// - received = (pos - X) + rms->input_buffer_samples
|
|
//
|
|
// This means the rtptime is computed as:
|
|
// - rtptime = X + received - rms->output_buffer_samples
|
|
// -> rtptime = X + (pos - X) + rms->input_buffer_samples - rms->out_buffer_samples
|
|
// -> rtptime = pos + rms->input_buffer_samples - rms->output_buffer_samples
|
|
rms->cur_stamp.pos = rms->rtp_session->pos + rms->input_buffer_samples - rms->output_buffer_samples;
|
|
}
|
|
|
|
static void
|
|
packets_sync_send(struct airplay_master_session *rms)
|
|
{
|
|
struct rtp_packet *sync_pkt;
|
|
struct airplay_session *rs;
|
|
struct timespec ts;
|
|
bool is_sync_time;
|
|
|
|
// Check if it is time send a sync packet to sessions that are already running
|
|
is_sync_time = rtp_sync_is_time(rms->rtp_session);
|
|
|
|
// Just used for logging, the clock shouldn't be too far from rms->cur_stamp.ts
|
|
clock_gettime(CLOCK_MONOTONIC, &ts);
|
|
|
|
for (rs = airplay_sessions; rs; rs = rs->next)
|
|
{
|
|
if (rs->master_session != rms)
|
|
continue;
|
|
|
|
// A device has joined and should get an init sync packet
|
|
if (rs->state == AIRPLAY_STATE_CONNECTED)
|
|
{
|
|
sync_pkt = rtp_sync_packet_next(rms->rtp_session, rms->cur_stamp, 0x90);
|
|
control_packet_send(rs, sync_pkt);
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Start sync packet sent to '%s': cur_pos=%" PRIu32 ", cur_ts=%ld.%09ld, clock=%ld.%09ld, rtptime=%" PRIu32 "\n",
|
|
rs->devname, rms->cur_stamp.pos, rms->cur_stamp.ts.tv_sec, rms->cur_stamp.ts.tv_nsec, ts.tv_sec, ts.tv_nsec, rms->rtp_session->pos);
|
|
}
|
|
else if (is_sync_time && rs->state == AIRPLAY_STATE_STREAMING)
|
|
{
|
|
sync_pkt = rtp_sync_packet_next(rms->rtp_session, rms->cur_stamp, 0x80);
|
|
control_packet_send(rs, sync_pkt);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* ------------------------- Time and control service ----------------------- */
|
|
|
|
static void
|
|
service_stop(struct airplay_service *svc)
|
|
{
|
|
if (svc->ev)
|
|
event_free(svc->ev);
|
|
|
|
if (svc->fd >= 0)
|
|
close(svc->fd);
|
|
|
|
svc->ev = NULL;
|
|
svc->fd = -1;
|
|
svc->port = 0;
|
|
}
|
|
|
|
static int
|
|
service_start(struct airplay_service *svc, event_callback_fn cb, unsigned short port, const char *log_service_name)
|
|
{
|
|
memset(svc, 0, sizeof(struct airplay_service));
|
|
|
|
svc->fd = net_bind(&port, SOCK_DGRAM, log_service_name);
|
|
if (svc->fd < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not start '%s' service\n", log_service_name);
|
|
goto error;
|
|
}
|
|
|
|
svc->ev = event_new(evbase_player, svc->fd, EV_READ | EV_PERSIST, cb, svc);
|
|
if (!svc->ev)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not create event for '%s' service\n", log_service_name);
|
|
goto error;
|
|
}
|
|
|
|
event_add(svc->ev, NULL);
|
|
|
|
svc->port = port;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
service_stop(svc);
|
|
return -1;
|
|
}
|
|
|
|
static void
|
|
timing_svc_cb(int fd, short what, void *arg)
|
|
{
|
|
struct airplay_service *svc = arg;
|
|
union net_sockaddr peer_addr;
|
|
socklen_t peer_addrlen = sizeof(peer_addr);
|
|
char address[INET6_ADDRSTRLEN];
|
|
uint8_t req[32];
|
|
uint8_t res[32];
|
|
struct ntp_stamp recv_stamp;
|
|
struct ntp_stamp xmit_stamp;
|
|
int ret;
|
|
|
|
ret = timing_get_clock_ntp(&recv_stamp);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Couldn't get receive timestamp\n");
|
|
return;
|
|
}
|
|
|
|
peer_addrlen = sizeof(peer_addr);
|
|
ret = recvfrom(svc->fd, req, sizeof(req), 0, &peer_addr.sa, &peer_addrlen);
|
|
if (ret < 0)
|
|
{
|
|
net_address_get(address, sizeof(address), &peer_addr);
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Error reading timing request from %s: %s\n", address, strerror(errno));
|
|
return;
|
|
}
|
|
|
|
if (ret != 32)
|
|
{
|
|
net_address_get(address, sizeof(address), &peer_addr);
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Got timing request from %s with size %d\n", address, ret);
|
|
return;
|
|
}
|
|
|
|
if ((req[0] != 0x80) || (req[1] != 0xd2))
|
|
{
|
|
net_address_get(address, sizeof(address), &peer_addr);
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Packet header from %s doesn't match timing request (got 0x%02x%02x, expected 0x80d2)\n", address, req[0], req[1]);
|
|
return;
|
|
}
|
|
|
|
memset(res, 0, sizeof(res));
|
|
|
|
/* Header */
|
|
res[0] = 0x80;
|
|
res[1] = 0xd3;
|
|
res[2] = req[2];
|
|
|
|
/* Copy client timestamp */
|
|
memcpy(res + 8, req + 24, 8);
|
|
|
|
/* Receive timestamp */
|
|
recv_stamp.sec = htobe32(recv_stamp.sec);
|
|
recv_stamp.frac = htobe32(recv_stamp.frac);
|
|
memcpy(res + 16, &recv_stamp.sec, 4);
|
|
memcpy(res + 20, &recv_stamp.frac, 4);
|
|
|
|
/* Transmit timestamp */
|
|
ret = timing_get_clock_ntp(&xmit_stamp);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Couldn't get transmit timestamp, falling back to receive timestamp\n");
|
|
|
|
/* Still better than failing altogether
|
|
* recv/xmit are close enough that it shouldn't matter much
|
|
*/
|
|
memcpy(res + 24, &recv_stamp.sec, 4);
|
|
memcpy(res + 28, &recv_stamp.frac, 4);
|
|
}
|
|
else
|
|
{
|
|
xmit_stamp.sec = htobe32(xmit_stamp.sec);
|
|
xmit_stamp.frac = htobe32(xmit_stamp.frac);
|
|
memcpy(res + 24, &xmit_stamp.sec, 4);
|
|
memcpy(res + 28, &xmit_stamp.frac, 4);
|
|
}
|
|
|
|
ret = sendto(svc->fd, res, sizeof(res), 0, &peer_addr.sa, peer_addrlen);
|
|
if (ret < 0)
|
|
{
|
|
net_address_get(address, sizeof(address), &peer_addr);
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not send timing reply to %s: %s\n", address, strerror(errno));
|
|
return;
|
|
}
|
|
}
|
|
|
|
static void
|
|
control_svc_cb(int fd, short what, void *arg)
|
|
{
|
|
struct airplay_service *svc = arg;
|
|
union net_sockaddr peer_addr = { 0 };
|
|
socklen_t peer_addrlen = sizeof(peer_addr);
|
|
char address[INET6_ADDRSTRLEN];
|
|
struct airplay_session *rs;
|
|
uint8_t req[8];
|
|
uint16_t seq_start;
|
|
uint16_t seq_len;
|
|
int ret;
|
|
|
|
ret = recvfrom(svc->fd, req, sizeof(req), 0, &peer_addr.sa, &peer_addrlen);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Error reading control request: %s\n", strerror(errno));
|
|
return;
|
|
}
|
|
|
|
if (ret != 8)
|
|
{
|
|
net_address_get(address, sizeof(address), &peer_addr);
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Got control request from %s with size %d\n", address, ret);
|
|
return;
|
|
}
|
|
|
|
if ((req[0] != 0x80) || (req[1] != 0xd5))
|
|
{
|
|
net_address_get(address, sizeof(address), &peer_addr);
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Packet header from %s doesn't match retransmit request (got 0x%02x%02x, expected 0x80d5)\n", address, req[0], req[1]);
|
|
return;
|
|
}
|
|
|
|
rs = session_find_by_address(&peer_addr);
|
|
if (!rs)
|
|
{
|
|
net_address_get(address, sizeof(address), &peer_addr);
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Control request from %s; not a AirPlay client\n", address);
|
|
return;
|
|
}
|
|
|
|
memcpy(&seq_start, req + 4, 2);
|
|
memcpy(&seq_len, req + 6, 2);
|
|
|
|
seq_start = be16toh(seq_start);
|
|
seq_len = be16toh(seq_len);
|
|
|
|
packets_resend(rs, seq_start, seq_len);
|
|
}
|
|
|
|
|
|
/* -------------------- Handlers for sending RTSP requests ------------------ */
|
|
|
|
static int
|
|
payload_make_flush(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
struct airplay_master_session *rms = rs->master_session;
|
|
char buf[64];
|
|
int ret;
|
|
|
|
/* Restart sequence */
|
|
ret = snprintf(buf, sizeof(buf), "seq=%" PRIu16 ";rtptime=%u", rms->rtp_session->seqnum, rms->rtp_session->pos);
|
|
if ((ret < 0) || (ret >= sizeof(buf)))
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "RTP-Info too big for buffer in FLUSH request\n");
|
|
return -1;
|
|
}
|
|
evrtsp_add_header(req->output_headers, "RTP-Info", buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
payload_make_teardown(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
// Normally we update status when we get the response, but teardown is an
|
|
// exception because we want to stop writing to the device immediately
|
|
rs->state = AIRPLAY_STATE_TEARDOWN;
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
payload_make_set_volume(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
float raop_volume;
|
|
char volstr[32];
|
|
int ret;
|
|
|
|
raop_volume = airplay_volume_from_pct(rs->volume, rs->devname);
|
|
|
|
/* Don't let locales get in the way here */
|
|
/* We use -%d and -(int)raop_volume so -0.3 won't become 0.3 */
|
|
snprintf(volstr, sizeof(volstr), "-%d.%06d", -(int)raop_volume, -(int)(1000000.0 * (raop_volume - (int)raop_volume)));
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Sending volume %s to '%s'\n", volstr, rs->devname);
|
|
|
|
ret = evbuffer_add_printf(req->output_buffer, "volume: %s\r\n", volstr);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Out of memory for SET_PARAMETER payload (volume)\n");
|
|
return -1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
payload_make_send_progress(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
struct output_metadata *metadata = arg;
|
|
uint32_t start;
|
|
uint32_t display;
|
|
uint32_t pos;
|
|
uint32_t end;
|
|
int ret;
|
|
|
|
metadata_rtptimes_get(&start, &display, &pos, &end, rs->master_session, metadata);
|
|
|
|
ret = evbuffer_add_printf(req->output_buffer, "progress: %u/%u/%u\r\n", display, pos, end);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not build progress string for sending\n");
|
|
return -1;
|
|
}
|
|
|
|
ret = rtpinfo_header_add(req, rs, metadata);
|
|
if (ret < 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
payload_make_send_artwork(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
struct output_metadata *metadata = arg;
|
|
struct airplay_metadata *rmd = metadata->priv;
|
|
char *ctype;
|
|
uint8_t *buf;
|
|
size_t len;
|
|
int ret;
|
|
|
|
switch (rmd->artwork_fmt)
|
|
{
|
|
case ART_FMT_PNG:
|
|
ctype = "image/png";
|
|
break;
|
|
|
|
case ART_FMT_JPEG:
|
|
ctype = "image/jpeg";
|
|
break;
|
|
|
|
default:
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Unsupported artwork format %d\n", rmd->artwork_fmt);
|
|
return -1;
|
|
}
|
|
|
|
buf = evbuffer_pullup(rmd->artwork, -1);
|
|
len = evbuffer_get_length(rmd->artwork);
|
|
|
|
ret = evbuffer_add(req->output_buffer, buf, len);
|
|
if (ret != 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not copy artwork for sending\n");
|
|
return -1;
|
|
}
|
|
|
|
ret = rtpinfo_header_add(req, rs, metadata);
|
|
if (ret < 0)
|
|
return -1;
|
|
|
|
evrtsp_add_header(req->output_headers, "Content-Type", ctype);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
payload_make_send_text(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
struct output_metadata *metadata = arg;
|
|
struct airplay_metadata *rmd = metadata->priv;
|
|
uint8_t *buf;
|
|
size_t len;
|
|
int ret;
|
|
|
|
buf = evbuffer_pullup(rmd->metadata, -1);
|
|
len = evbuffer_get_length(rmd->metadata);
|
|
|
|
ret = evbuffer_add(req->output_buffer, buf, len);
|
|
if (ret != 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not copy metadata for sending\n");
|
|
return -1;
|
|
}
|
|
|
|
ret = rtpinfo_header_add(req, rs, metadata);
|
|
if (ret < 0)
|
|
return -1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/*
|
|
Audio formats
|
|
|
|
Bit Value Type
|
|
2 0x4 PCM/8000/16/1
|
|
3 0x8 PCM/8000/16/2
|
|
4 0x10 PCM/16000/16/1
|
|
5 0x20 PCM/16000/16/2
|
|
6 0x40 PCM/24000/16/1
|
|
7 0x80 PCM/24000/16/2
|
|
8 0x100 PCM/32000/16/1
|
|
9 0x200 PCM/32000/16/2
|
|
10 0x400 PCM/44100/16/1
|
|
11 0x800 PCM/44100/16/2
|
|
12 0x1000 PCM/44100/24/1
|
|
13 0x2000 PCM/44100/24/2
|
|
14 0x4000 PCM/48000/16/1
|
|
15 0x8000 PCM/48000/16/2
|
|
16 0x10000 PCM/48000/24/1
|
|
17 0x20000 PCM/48000/24/2
|
|
18 0x40000 ALAC/44100/16/2
|
|
19 0x80000 ALAC/44100/24/2
|
|
20 0x100000 ALAC/48000/16/2
|
|
21 0x200000 ALAC/48000/24/2
|
|
22 0x400000 AAC-LC/44100/2
|
|
23 0x800000 AAC-LC/48000/2
|
|
24 0x1000000 AAC-ELD/44100/2
|
|
25 0x2000000 AAC-ELD/48000/2
|
|
26 0x4000000 AAC-ELD/16000/1
|
|
27 0x8000000 AAC-ELD/24000/1
|
|
28 0x10000000 OPUS/16000/1
|
|
29 0x20000000 OPUS/24000/1
|
|
30 0x40000000 OPUS/48000/1
|
|
31 0x80000000 AAC-ELD/44100/1
|
|
32 0x100000000 AAC-ELD/48000/1
|
|
*/
|
|
static int
|
|
payload_make_setup_stream(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
plist_t root;
|
|
plist_t streams;
|
|
plist_t stream;
|
|
uint8_t *data;
|
|
size_t len;
|
|
int ret;
|
|
|
|
stream = plist_new_dict();
|
|
wplist_dict_add_uint(stream, "audioFormat", 262144); // 0x40000 ALAC/44100/16/2
|
|
wplist_dict_add_string(stream, "audioMode", "default");
|
|
wplist_dict_add_uint(stream, "controlPort", rs->control_svc->port);
|
|
wplist_dict_add_uint(stream, "ct", 2); // Compression type, 1 LPCM, 2 ALAC, 3 AAC, 4 AAC ELD, 32 OPUS
|
|
wplist_dict_add_bool(stream, "isMedia", true); // ?
|
|
wplist_dict_add_uint(stream, "latencyMax", 88200); // TODO how do these latencys work?
|
|
wplist_dict_add_uint(stream, "latencyMin", 11025);
|
|
wplist_dict_add_data(stream, "shk", rs->shared_secret, AIRPLAY_AUDIO_KEY_LEN);
|
|
wplist_dict_add_uint(stream, "spf", AIRPLAY_SAMPLES_PER_PACKET); // frames per packet
|
|
wplist_dict_add_uint(stream, "sr", AIRPLAY_QUALITY_SAMPLE_RATE_DEFAULT); // sample rate
|
|
wplist_dict_add_uint(stream, "type", AIRPLAY_RTP_PAYLOADTYPE); // RTP type, 0x60 = 96 real time, 103 buffered
|
|
wplist_dict_add_bool(stream, "supportsDynamicStreamID", false);
|
|
wplist_dict_add_uint(stream, "streamConnectionID", rs->session_id); // Hopefully fine since we have one stream per session
|
|
streams = plist_new_array();
|
|
plist_array_append_item(streams, stream);
|
|
|
|
root = plist_new_dict();
|
|
plist_dict_set_item(root, "streams", streams);
|
|
ret = wplist_to_bin(&data, &len, root);
|
|
plist_free(root);
|
|
|
|
if (ret < 0)
|
|
return -1;
|
|
|
|
evbuffer_add(req->output_buffer, data, len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
payload_make_setpeers(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
plist_t item;
|
|
uint8_t *data;
|
|
size_t len;
|
|
int ret;
|
|
|
|
plist_t root;
|
|
|
|
// TODO also have ipv6
|
|
root = plist_new_array();
|
|
item = plist_new_string(rs->address);
|
|
plist_array_append_item(root, item);
|
|
item = plist_new_string(rs->local_address);
|
|
plist_array_append_item(root, item);
|
|
|
|
ret = wplist_to_bin(&data, &len, root);
|
|
plist_free(root);
|
|
|
|
if (ret < 0)
|
|
return -1;
|
|
|
|
evbuffer_add(req->output_buffer, data, len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
payload_make_record(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
struct airplay_master_session *rms = rs->master_session;
|
|
char buf[64];
|
|
int ret;
|
|
|
|
evrtsp_add_header(req->output_headers, "X-Apple-ProtocolVersion", "1");
|
|
|
|
evrtsp_add_header(req->output_headers, "Range", "npt=0-");
|
|
|
|
// Start sequence: next sequence
|
|
ret = snprintf(buf, sizeof(buf), "seq=%" PRIu16 ";rtptime=%u", rms->rtp_session->seqnum, rms->rtp_session->pos);
|
|
if ((ret < 0) || (ret >= sizeof(buf)))
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "RTP-Info too big for buffer in RECORD request\n");
|
|
return -1;
|
|
}
|
|
evrtsp_add_header(req->output_headers, "RTP-Info", buf);
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "RTP-Info is %s\n", buf);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
payload_make_setup_session(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
plist_t root;
|
|
plist_t addresses;
|
|
plist_t address;
|
|
char device_id_colon[24];
|
|
uint8_t *data;
|
|
size_t len;
|
|
int ret;
|
|
|
|
device_id_colon_make(device_id_colon, sizeof(device_id_colon), airplay_device_id);
|
|
|
|
address = plist_new_string(rs->local_address);
|
|
addresses = plist_new_array();
|
|
plist_array_append_item(addresses, address);
|
|
|
|
root = plist_new_dict();
|
|
wplist_dict_add_string(root, "deviceID", device_id_colon);
|
|
wplist_dict_add_string(root, "sessionUUID", rs->session_uuid);
|
|
wplist_dict_add_uint(root, "timingPort", rs->timing_svc->port);
|
|
wplist_dict_add_string(root, "timingProtocol", "NTP"); // If set to "None" then an ATV4 will not respond to stream SETUP request
|
|
|
|
ret = wplist_to_bin(&data, &len, root);
|
|
plist_free(root);
|
|
|
|
if (ret < 0)
|
|
return -1;
|
|
|
|
evbuffer_add(req->output_buffer, data, len);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
The purpose of auth-setup is to authenticate the device and to exchange keys
|
|
for encryption. We don't do that, but some AirPlay 2 speakers (Sonos beam,
|
|
Airport Express fw 7.8) require this step anyway, otherwise we get a 403 to
|
|
our ANNOUNCE. So we do it with a flag for no encryption, and without actually
|
|
authenticating the device.
|
|
|
|
Good to know (source Apple's MFi Accessory Interface Specification):
|
|
- Curve25519 Elliptic-Curve Diffie-Hellman technology for key exchange
|
|
- RSA for signing and verifying and AES-128 in counter mode for encryption
|
|
- We start by sending a Curve25519 public key + no encryption flag
|
|
- The device responds with public key, MFi certificate and a signature, which
|
|
is created by the device signing the two public keys with its RSA private
|
|
key and then encrypting the result with the AES master key derived from the
|
|
Curve25519 shared secret (generated from device private key and our public
|
|
key)
|
|
- The AES key derived from the Curve25519 shared secret can then be used to
|
|
encrypt future content
|
|
- New keys should be generated for each authentication attempt, but we don't
|
|
do that because we don't really use this + it adds a libsodium dependency
|
|
|
|
Since we don't do auth or encryption, we currently just ignore the reponse.
|
|
*/
|
|
|
|
#if AIRPLAY_USE_AUTH_SETUP
|
|
static int
|
|
payload_make_auth_setup(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
if (!rs->supports_auth_setup)
|
|
return 1; // skip this request
|
|
|
|
// Flag for no encryption. 0x10 may mean encryption.
|
|
evbuffer_add(req->output_buffer, "\x01", 1);
|
|
|
|
evbuffer_add(req->output_buffer, airplay_auth_setup_pubkey, sizeof(airplay_auth_setup_pubkey) - 1);
|
|
|
|
return 0;
|
|
}
|
|
#endif
|
|
|
|
static int
|
|
payload_make_pin_start(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Starting device pairing for '%s', go to the web interface and enter PIN\n", rs->devname);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
payload_make_pair_generic(int step, struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
uint8_t *body;
|
|
size_t len;
|
|
const char *errmsg;
|
|
|
|
switch (step)
|
|
{
|
|
case 1:
|
|
body = pair_setup_request1(&len, rs->pair_setup_ctx);
|
|
errmsg = pair_setup_errmsg(rs->pair_setup_ctx);
|
|
break;
|
|
case 2:
|
|
body = pair_setup_request2(&len, rs->pair_setup_ctx);
|
|
errmsg = pair_setup_errmsg(rs->pair_setup_ctx);
|
|
break;
|
|
case 3:
|
|
body = pair_setup_request3(&len, rs->pair_setup_ctx);
|
|
errmsg = pair_setup_errmsg(rs->pair_setup_ctx);
|
|
break;
|
|
case 4:
|
|
body = pair_verify_request1(&len, rs->pair_verify_ctx);
|
|
errmsg = pair_verify_errmsg(rs->pair_verify_ctx);
|
|
break;
|
|
case 5:
|
|
body = pair_verify_request2(&len, rs->pair_verify_ctx);
|
|
errmsg = pair_verify_errmsg(rs->pair_verify_ctx);
|
|
break;
|
|
default:
|
|
body = NULL;
|
|
errmsg = "Bug! Bad step number";
|
|
}
|
|
|
|
if (!body)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Verification step %d request error: %s\n", step, errmsg);
|
|
return -1;
|
|
}
|
|
|
|
evbuffer_add(req->output_buffer, body, len);
|
|
free(body);
|
|
|
|
// Required!!
|
|
if (rs->pair_type == PAIR_CLIENT_HOMEKIT_NORMAL)
|
|
evrtsp_add_header(req->output_headers, "X-Apple-HKP", "3");
|
|
else if (rs->pair_type == PAIR_CLIENT_HOMEKIT_TRANSIENT)
|
|
evrtsp_add_header(req->output_headers, "X-Apple-HKP", "4");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
payload_make_pair_setup1(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
char *pin = arg;
|
|
char device_id_hex[16 + 1];
|
|
|
|
if (pin)
|
|
rs->pair_type = PAIR_CLIENT_HOMEKIT_NORMAL;
|
|
|
|
snprintf(device_id_hex, sizeof(device_id_hex), "%016" PRIX64, airplay_device_id);
|
|
|
|
rs->pair_setup_ctx = pair_setup_new(rs->pair_type, pin, device_id_hex);
|
|
if (!rs->pair_setup_ctx)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Out of memory for verification setup context\n");
|
|
return -1;
|
|
}
|
|
|
|
rs->state = AIRPLAY_STATE_AUTH;
|
|
|
|
return payload_make_pair_generic(1, req, rs);
|
|
}
|
|
|
|
static int
|
|
payload_make_pair_setup2(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
return payload_make_pair_generic(2, req, rs);
|
|
}
|
|
|
|
static int
|
|
payload_make_pair_setup3(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
return payload_make_pair_generic(3, req, rs);
|
|
}
|
|
|
|
static int
|
|
payload_make_pair_verify1(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
struct output_device *device;
|
|
char device_id_hex[16 + 1];
|
|
|
|
device = outputs_device_get(rs->device_id);
|
|
if (!device)
|
|
return -1;
|
|
|
|
snprintf(device_id_hex, sizeof(device_id_hex), "%016" PRIX64, airplay_device_id);
|
|
|
|
rs->pair_verify_ctx = pair_verify_new(rs->pair_type, device->auth_key, device_id_hex);
|
|
if (!rs->pair_verify_ctx)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Out of memory for verification verify context\n");
|
|
return -1;
|
|
}
|
|
|
|
return payload_make_pair_generic(4, req, rs);
|
|
}
|
|
|
|
static int
|
|
payload_make_pair_verify2(struct evrtsp_request *req, struct airplay_session *rs, void *arg)
|
|
{
|
|
return payload_make_pair_generic(5, req, rs);
|
|
}
|
|
|
|
|
|
/* ------------------------------ Session startup --------------------------- */
|
|
|
|
static void
|
|
start_failure(struct airplay_session *rs)
|
|
{
|
|
struct output_device *device;
|
|
|
|
device = outputs_device_get(rs->device_id);
|
|
if (!device)
|
|
{
|
|
session_failure(rs);
|
|
return;
|
|
}
|
|
|
|
// If our key was incorrect, or the device reset its pairings, then this
|
|
// function was called because the encrypted request (SETUP) timed out
|
|
if (device->auth_key)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Clearing '%s' pairing keys, you need to pair again\n", rs->devname);
|
|
|
|
free(device->auth_key);
|
|
device->auth_key = NULL;
|
|
device->requires_auth = 1;
|
|
}
|
|
|
|
session_failure(rs);
|
|
}
|
|
|
|
static void
|
|
start_retry(struct airplay_session *rs)
|
|
{
|
|
struct output_device *device;
|
|
int callback_id = rs->callback_id;
|
|
|
|
device = outputs_device_get(rs->device_id);
|
|
if (!device)
|
|
{
|
|
session_failure(rs);
|
|
return;
|
|
}
|
|
|
|
// Some devices don't seem to work with ipv6, so if the error wasn't a hard
|
|
// failure (bad password) we fall back to ipv4 and flag device as bad for ipv6
|
|
if (rs->family != AF_INET6 || (rs->state & AIRPLAY_STATE_F_FAILED))
|
|
{
|
|
session_failure(rs);
|
|
return;
|
|
}
|
|
|
|
// This flag is permanent and will not be overwritten by mdns advertisements
|
|
device->v6_disabled = 1;
|
|
|
|
// Drop session, try again with ipv4
|
|
session_cleanup(rs);
|
|
airplay_device_start(device, callback_id);
|
|
}
|
|
|
|
|
|
/* ---------------------------- RTSP response handlers ---------------------- */
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_pin_start(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
rs->state = AIRPLAY_STATE_AUTH;
|
|
|
|
return AIRPLAY_SEQ_CONTINUE; // TODO before we reported failure since device is locked
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_record(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
rs->state = AIRPLAY_STATE_RECORD;
|
|
|
|
return AIRPLAY_SEQ_CONTINUE;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_setup_stream(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
plist_t response;
|
|
plist_t streams;
|
|
plist_t stream;
|
|
plist_t item;
|
|
uint64_t uintval;
|
|
int ret;
|
|
|
|
DPRINTF(E_INFO, L_AIRPLAY, "Setting up AirPlay session %u (%s -> %s)\n", rs->session_id, rs->local_address, rs->address);
|
|
|
|
ret = wplist_from_evbuf(&response, req->input_buffer);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not parse plist from '%s'\n", rs->devname);
|
|
return AIRPLAY_SEQ_ABORT;
|
|
}
|
|
|
|
streams = plist_dict_get_item(response, "streams");
|
|
if (!streams)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not find streams item in response from '%s'\n", rs->devname);
|
|
goto error;
|
|
}
|
|
|
|
stream = plist_array_get_item(streams, 0);
|
|
if (!stream)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not find stream item in response from '%s'\n", rs->devname);
|
|
goto error;
|
|
}
|
|
|
|
item = plist_dict_get_item(stream, "dataPort");
|
|
if (item)
|
|
{
|
|
plist_get_uint_val(item, &uintval);
|
|
rs->data_port = uintval;
|
|
}
|
|
|
|
item = plist_dict_get_item(stream, "controlPort");
|
|
if (item)
|
|
{
|
|
plist_get_uint_val(item, &uintval);
|
|
rs->control_port = uintval;
|
|
}
|
|
|
|
if (rs->data_port == 0 || rs->control_port == 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Missing port number in reply from '%s' (d=%u, c=%u)\n", rs->devname, rs->data_port, rs->control_port);
|
|
goto error;
|
|
}
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Negotiated UDP streaming session; ports d=%u c=%u t=%u e=%u\n", rs->data_port, rs->control_port, rs->timing_port, rs->events_port);
|
|
|
|
rs->server_fd = net_connect(rs->address, rs->data_port, SOCK_DGRAM, "AirPlay data");
|
|
if (rs->server_fd < 0)
|
|
{
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Could not connect to data port\n");
|
|
goto error;
|
|
}
|
|
|
|
// Reverse connection, used to receive playback events from device
|
|
ret = airplay_events_listen(rs->devname, rs->address, rs->events_port, rs->shared_secret, rs->shared_secret_len);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Could not connect to '%s' events port %u, proceeding anyway\n", rs->devname, rs->events_port);
|
|
}
|
|
|
|
rs->state = AIRPLAY_STATE_SETUP;
|
|
|
|
plist_free(response);
|
|
return AIRPLAY_SEQ_CONTINUE;
|
|
|
|
error:
|
|
plist_free(response);
|
|
return AIRPLAY_SEQ_ABORT;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_volume_start(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
int ret;
|
|
|
|
ret = airplay_metadata_startup_send(rs);
|
|
if (ret < 0)
|
|
return AIRPLAY_SEQ_ABORT;
|
|
|
|
return AIRPLAY_SEQ_CONTINUE;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_setup_session(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
plist_t response;
|
|
plist_t item;
|
|
uint64_t uintval;
|
|
int ret;
|
|
|
|
ret = wplist_from_evbuf(&response, req->input_buffer);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not parse plist from '%s'\n", rs->devname);
|
|
return AIRPLAY_SEQ_ABORT;
|
|
}
|
|
|
|
item = plist_dict_get_item(response, "eventPort");
|
|
if (item)
|
|
{
|
|
plist_get_uint_val(item, &uintval);
|
|
rs->events_port = uintval;
|
|
}
|
|
|
|
item = plist_dict_get_item(response, "timingPort");
|
|
if (item)
|
|
{
|
|
plist_get_uint_val(item, &uintval);
|
|
rs->timing_port = uintval;
|
|
}
|
|
|
|
if (rs->events_port == 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "SETUP reply is missing event port\n");
|
|
goto error;
|
|
}
|
|
|
|
plist_free(response);
|
|
return AIRPLAY_SEQ_CONTINUE;
|
|
|
|
error:
|
|
plist_free(response);
|
|
return AIRPLAY_SEQ_ABORT;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_flush(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
rs->state = AIRPLAY_STATE_CONNECTED;
|
|
return AIRPLAY_SEQ_CONTINUE;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_teardown(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
rs->state = AIRPLAY_STATE_STOPPED;
|
|
return AIRPLAY_SEQ_CONTINUE;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_teardown_failure(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
if (rs->state != AIRPLAY_STATE_AUTH)
|
|
rs->state = AIRPLAY_STATE_FAILED;
|
|
return AIRPLAY_SEQ_CONTINUE;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_info_generic(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
struct output_device *device;
|
|
plist_t response;
|
|
plist_t item;
|
|
int ret;
|
|
|
|
device = outputs_device_get(rs->device_id);
|
|
if (!device)
|
|
return AIRPLAY_SEQ_ABORT;
|
|
|
|
ret = session_ids_set(rs);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not make session url or id for device '%s'\n", rs->devname);
|
|
return AIRPLAY_SEQ_ABORT;
|
|
}
|
|
|
|
ret = wplist_from_evbuf(&response, req->input_buffer);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not parse plist from '%s'\n", rs->devname);
|
|
return AIRPLAY_SEQ_ABORT;
|
|
}
|
|
|
|
item = plist_dict_get_item(response, "statusFlags");
|
|
if (item)
|
|
plist_get_uint_val(item, &rs->statusflags);
|
|
|
|
plist_free(response);
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Status flags from '%s' was %" PRIu64 ": cable attached %d, one time pairing %d, password %d, PIN %d\n",
|
|
rs->devname, rs->statusflags, (bool)(rs->statusflags & AIRPLAY_FLAG_AUDIO_CABLE_ATTACHED), (bool)(rs->statusflags & AIRPLAY_FLAG_ONE_TIME_PAIRING_REQUIRED),
|
|
(bool)(rs->statusflags & AIRPLAY_FLAG_PASSWORD_REQUIRED), (bool)(rs->statusflags & AIRPLAY_FLAG_PIN_REQUIRED));
|
|
|
|
// Evaluate what next sequence based on response
|
|
if (rs->statusflags & AIRPLAY_FLAG_ONE_TIME_PAIRING_REQUIRED)
|
|
{
|
|
rs->pair_type = PAIR_CLIENT_HOMEKIT_NORMAL;
|
|
|
|
if (!device->auth_key)
|
|
{
|
|
device->requires_auth = 1;
|
|
rs->state = AIRPLAY_STATE_AUTH;
|
|
return AIRPLAY_SEQ_PIN_START;
|
|
}
|
|
|
|
rs->state = AIRPLAY_STATE_INFO;
|
|
return AIRPLAY_SEQ_PAIR_VERIFY;
|
|
}
|
|
else if (rs->statusflags & AIRPLAY_FLAG_PIN_REQUIRED)
|
|
{
|
|
free(device->auth_key);
|
|
device->auth_key = NULL;
|
|
device->requires_auth = 1;
|
|
|
|
rs->pair_type = PAIR_CLIENT_HOMEKIT_NORMAL;
|
|
rs->state = AIRPLAY_STATE_AUTH;
|
|
return AIRPLAY_SEQ_PIN_START;
|
|
}
|
|
else if (rs->statusflags & AIRPLAY_FLAG_PASSWORD_REQUIRED)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "'%s' requires password authentication, but that is currently unsupported for AirPlay 2\n", rs->devname);
|
|
rs->state = AIRPLAY_STATE_AUTH;
|
|
return AIRPLAY_SEQ_ABORT;
|
|
}
|
|
|
|
rs->pair_type = PAIR_CLIENT_HOMEKIT_TRANSIENT;
|
|
rs->state = AIRPLAY_STATE_INFO;
|
|
return AIRPLAY_SEQ_PAIR_TRANSIENT;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_info_probe(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
enum airplay_seq_type seq_type;
|
|
|
|
seq_type = response_handler_info_generic(req, rs);
|
|
if (seq_type == AIRPLAY_SEQ_ABORT || seq_type == AIRPLAY_SEQ_PIN_START)
|
|
return seq_type;
|
|
|
|
// When probing we don't want to continue with PAIR_VERIFY or PAIR_TRANSIENT
|
|
return AIRPLAY_SEQ_CONTINUE;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_info_start(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
enum airplay_seq_type seq_type;
|
|
|
|
seq_type = response_handler_info_generic(req, rs);
|
|
if (seq_type == AIRPLAY_SEQ_ABORT || seq_type == AIRPLAY_SEQ_PIN_START)
|
|
return seq_type;
|
|
|
|
// Pair and then run SEQ_START_PLAYBACK which sets up the playback
|
|
rs->next_seq = AIRPLAY_SEQ_START_PLAYBACK;
|
|
|
|
return seq_type;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_pair_generic(int step, struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
uint8_t *response;
|
|
const char *errmsg;
|
|
size_t len;
|
|
int ret;
|
|
|
|
response = evbuffer_pullup(req->input_buffer, -1);
|
|
len = evbuffer_get_length(req->input_buffer);
|
|
|
|
switch (step)
|
|
{
|
|
case 1:
|
|
ret = pair_setup_response1(rs->pair_setup_ctx, response, len);
|
|
errmsg = pair_setup_errmsg(rs->pair_setup_ctx);
|
|
break;
|
|
case 2:
|
|
ret = pair_setup_response2(rs->pair_setup_ctx, response, len);
|
|
errmsg = pair_setup_errmsg(rs->pair_setup_ctx);
|
|
break;
|
|
case 3:
|
|
ret = pair_setup_response3(rs->pair_setup_ctx, response, len);
|
|
errmsg = pair_setup_errmsg(rs->pair_setup_ctx);
|
|
break;
|
|
case 4:
|
|
ret = pair_verify_response1(rs->pair_verify_ctx, response, len);
|
|
errmsg = pair_verify_errmsg(rs->pair_verify_ctx);
|
|
break;
|
|
case 5:
|
|
ret = pair_verify_response2(rs->pair_verify_ctx, response, len);
|
|
errmsg = pair_verify_errmsg(rs->pair_verify_ctx);
|
|
break;
|
|
default:
|
|
ret = -1;
|
|
errmsg = "Bug! Bad step number";
|
|
}
|
|
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Pairing step %d response from '%s' error: %s\n", step, rs->devname, errmsg);
|
|
DHEXDUMP(E_DBG, L_AIRPLAY, response, len, "Raw response");
|
|
return AIRPLAY_SEQ_ABORT;
|
|
}
|
|
|
|
return AIRPLAY_SEQ_CONTINUE;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_pair_setup1(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
struct output_device *device;
|
|
|
|
if (rs->pair_type == PAIR_CLIENT_HOMEKIT_TRANSIENT && req->response_code == RTSP_CONNECTION_AUTH_REQUIRED)
|
|
{
|
|
device = outputs_device_get(rs->device_id);
|
|
if (!device)
|
|
return AIRPLAY_SEQ_ABORT;
|
|
|
|
device->requires_auth = 1; // FIXME might be reset by mdns announcement
|
|
rs->pair_type = PAIR_CLIENT_HOMEKIT_NORMAL;
|
|
|
|
return AIRPLAY_SEQ_PIN_START;
|
|
}
|
|
|
|
return response_handler_pair_generic(1, req, rs);
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_pair_setup2(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
enum airplay_seq_type seq_type;
|
|
const uint8_t *shared_secret;
|
|
size_t shared_secret_len;
|
|
int ret;
|
|
|
|
seq_type = response_handler_pair_generic(2, req, rs);
|
|
if (seq_type != AIRPLAY_SEQ_CONTINUE)
|
|
return seq_type;
|
|
|
|
if (rs->pair_type != PAIR_CLIENT_HOMEKIT_TRANSIENT)
|
|
return seq_type;
|
|
|
|
ret = pair_setup_result(NULL, &shared_secret, &shared_secret_len, rs->pair_setup_ctx);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Transient setup result error: %s\n", pair_setup_errmsg(rs->pair_setup_ctx));
|
|
goto error;
|
|
}
|
|
|
|
ret = session_cipher_setup(rs, shared_secret, shared_secret_len);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Pair transient error setting up encryption for '%s'\n", rs->devname);
|
|
goto error;
|
|
}
|
|
|
|
return AIRPLAY_SEQ_CONTINUE;
|
|
|
|
error:
|
|
rs->state = AIRPLAY_STATE_FAILED;
|
|
return AIRPLAY_SEQ_ABORT;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_pair_setup3(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
struct output_device *device;
|
|
const char *authorization_key;
|
|
enum airplay_seq_type seq_type;
|
|
int ret;
|
|
|
|
seq_type = response_handler_pair_generic(3, req, rs);
|
|
if (seq_type != AIRPLAY_SEQ_CONTINUE)
|
|
return seq_type;
|
|
|
|
ret = pair_setup_result(&authorization_key, NULL, NULL, rs->pair_setup_ctx);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Pair setup result error: %s\n", pair_setup_errmsg(rs->pair_setup_ctx));
|
|
return AIRPLAY_SEQ_ABORT;
|
|
}
|
|
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Pair setup stage complete, saving authorization key\n");
|
|
|
|
device = outputs_device_get(rs->device_id);
|
|
if (!device)
|
|
return AIRPLAY_SEQ_ABORT;
|
|
|
|
free(device->auth_key);
|
|
device->auth_key = strdup(authorization_key);
|
|
|
|
// A blocking db call... :-~
|
|
db_speaker_save(device);
|
|
|
|
// No longer AIRPLAY_STATE_AUTH
|
|
rs->state = AIRPLAY_STATE_STOPPED;
|
|
|
|
return AIRPLAY_SEQ_CONTINUE;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_pair_verify1(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
struct output_device *device;
|
|
enum airplay_seq_type seq_type;
|
|
|
|
seq_type = response_handler_pair_generic(4, req, rs);
|
|
if (seq_type != AIRPLAY_SEQ_CONTINUE)
|
|
{
|
|
rs->state = AIRPLAY_STATE_AUTH;
|
|
|
|
device = outputs_device_get(rs->device_id);
|
|
if (!device)
|
|
return AIRPLAY_SEQ_ABORT;
|
|
|
|
// Clear auth_key, the device did not accept it
|
|
free(device->auth_key);
|
|
device->auth_key = NULL;
|
|
|
|
return AIRPLAY_SEQ_ABORT;
|
|
}
|
|
|
|
return seq_type;
|
|
}
|
|
|
|
static enum airplay_seq_type
|
|
response_handler_pair_verify2(struct evrtsp_request *req, struct airplay_session *rs)
|
|
{
|
|
struct output_device *device;
|
|
enum airplay_seq_type seq_type;
|
|
const uint8_t *shared_secret;
|
|
size_t shared_secret_len;
|
|
int ret;
|
|
|
|
seq_type = response_handler_pair_generic(5, req, rs);
|
|
if (seq_type != AIRPLAY_SEQ_CONTINUE)
|
|
goto error;
|
|
|
|
ret = pair_verify_result(&shared_secret, &shared_secret_len, rs->pair_verify_ctx);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Pair verify result error: %s\n", pair_verify_errmsg(rs->pair_verify_ctx));
|
|
goto error;
|
|
}
|
|
|
|
ret = session_cipher_setup(rs, shared_secret, shared_secret_len);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Pair verify error setting up encryption for '%s'\n", rs->devname);
|
|
goto error;
|
|
}
|
|
|
|
return AIRPLAY_SEQ_CONTINUE;
|
|
|
|
error:
|
|
device = outputs_device_get(rs->device_id);
|
|
if (!device)
|
|
return AIRPLAY_SEQ_ABORT;
|
|
|
|
// Clear auth_key, the device did not accept it, or some other unexpected error
|
|
free(device->auth_key);
|
|
device->auth_key = NULL;
|
|
|
|
rs->state = AIRPLAY_STATE_AUTH;
|
|
|
|
return AIRPLAY_SEQ_ABORT;
|
|
}
|
|
|
|
|
|
/* ---------------------- Request/response sequence control ----------------- */
|
|
|
|
/*
|
|
* Request queueing HOWTO
|
|
*
|
|
* Sending:
|
|
* - increment rs->reqs_in_flight
|
|
* - set evrtsp connection closecb to NULL
|
|
*
|
|
* Request callback:
|
|
* - decrement rs->reqs_in_flight first thing, even if the callback is
|
|
* called for error handling (req == NULL or HTTP error code)
|
|
* - if rs->reqs_in_flight == 0, setup evrtsp connection closecb
|
|
*
|
|
* When a request fails, the whole AirPlay session is declared failed and
|
|
* torn down by calling session_failure(), even if there are requests
|
|
* queued on the evrtsp connection. There is no reason to think pending
|
|
* requests would work out better than the one that just failed and recovery
|
|
* would be tricky to get right.
|
|
*
|
|
* evrtsp behaviour with queued requests:
|
|
* - request callback is called with req == NULL to indicate a connection
|
|
* error; if there are several requests queued on the connection, this can
|
|
* happen for each request if the connection isn't destroyed
|
|
* - the connection is reset, and the closecb is called if the connection was
|
|
* previously connected. There is no closecb set when there are requests in
|
|
* flight
|
|
*/
|
|
|
|
static struct airplay_seq_definition airplay_seq_definition[] =
|
|
{
|
|
{ AIRPLAY_SEQ_START, NULL, start_retry },
|
|
{ AIRPLAY_SEQ_START_PLAYBACK, session_connected, start_failure },
|
|
{ AIRPLAY_SEQ_PROBE, session_success, session_failure },
|
|
{ AIRPLAY_SEQ_FLUSH, session_status, session_failure },
|
|
{ AIRPLAY_SEQ_STOP, session_success, session_failure },
|
|
{ AIRPLAY_SEQ_FAILURE, session_success, session_failure},
|
|
{ AIRPLAY_SEQ_PIN_START, session_success, session_failure },
|
|
{ AIRPLAY_SEQ_SEND_VOLUME, session_status, session_failure },
|
|
{ AIRPLAY_SEQ_SEND_TEXT, NULL, session_failure },
|
|
{ AIRPLAY_SEQ_SEND_PROGRESS, NULL, session_failure },
|
|
{ AIRPLAY_SEQ_SEND_ARTWORK, NULL, session_failure },
|
|
{ AIRPLAY_SEQ_PAIR_SETUP, session_pair_success, session_failure },
|
|
{ AIRPLAY_SEQ_PAIR_VERIFY, session_pair_success, session_failure },
|
|
{ AIRPLAY_SEQ_PAIR_TRANSIENT, session_pair_success, session_failure },
|
|
{ AIRPLAY_SEQ_FEEDBACK, NULL, session_failure },
|
|
};
|
|
|
|
// The size of the second array dimension MUST at least be the size of largest
|
|
// sequence + 1, because then we can count on a zero terminator when iterating
|
|
static struct airplay_seq_request airplay_seq_request[][7] =
|
|
{
|
|
{
|
|
{ AIRPLAY_SEQ_START, "GET /info", EVRTSP_REQ_GET, NULL, response_handler_info_start, NULL, "/info", false },
|
|
},
|
|
{
|
|
#if AIRPLAY_USE_AUTH_SETUP
|
|
{ AIRPLAY_SEQ_START_PLAYBACK, "auth-setup", EVRTSP_REQ_POST, payload_make_auth_setup, NULL, "application/octet-stream", "/auth-setup", true },
|
|
#endif
|
|
{ AIRPLAY_SEQ_START_PLAYBACK, "SETUP (session)", EVRTSP_REQ_SETUP, payload_make_setup_session, response_handler_setup_session, "application/x-apple-binary-plist", NULL, false },
|
|
{ AIRPLAY_SEQ_START_PLAYBACK, "SETPEERS", EVRTSP_REQ_SETPEERS, payload_make_setpeers, NULL, "/peer-list-changed", NULL, false },
|
|
{ AIRPLAY_SEQ_START_PLAYBACK, "SETUP (stream)", EVRTSP_REQ_SETUP, payload_make_setup_stream, response_handler_setup_stream, "application/x-apple-binary-plist", NULL, false },
|
|
{ AIRPLAY_SEQ_START_PLAYBACK, "RECORD", EVRTSP_REQ_RECORD, payload_make_record, response_handler_record, NULL, NULL, false },
|
|
// Some devices (e.g. Sonos Symfonisk) don't register the volume if it isn't last
|
|
{ AIRPLAY_SEQ_START_PLAYBACK, "SET_PARAMETER (volume)", EVRTSP_REQ_SET_PARAMETER, payload_make_set_volume, response_handler_volume_start, "text/parameters", NULL, true },
|
|
},
|
|
{
|
|
{ AIRPLAY_SEQ_PROBE, "GET /info (probe)", EVRTSP_REQ_GET, NULL, response_handler_info_probe, NULL, "/info", false },
|
|
},
|
|
{
|
|
{ AIRPLAY_SEQ_FLUSH, "FLUSH", EVRTSP_REQ_FLUSH, payload_make_flush, response_handler_flush, NULL, NULL, false },
|
|
},
|
|
{
|
|
{ AIRPLAY_SEQ_STOP, "TEARDOWN", EVRTSP_REQ_TEARDOWN, payload_make_teardown, response_handler_teardown, NULL, NULL, true },
|
|
},
|
|
{
|
|
{ AIRPLAY_SEQ_FAILURE, "TEARDOWN (failure)", EVRTSP_REQ_TEARDOWN, payload_make_teardown, response_handler_teardown_failure, NULL, NULL, false },
|
|
},
|
|
{
|
|
{ AIRPLAY_SEQ_PIN_START, "PIN start", EVRTSP_REQ_POST, payload_make_pin_start, response_handler_pin_start, NULL, "/pair-pin-start", false },
|
|
},
|
|
{
|
|
{ AIRPLAY_SEQ_SEND_VOLUME, "SET_PARAMETER (volume)", EVRTSP_REQ_SET_PARAMETER, payload_make_set_volume, NULL, "text/parameters", NULL, true },
|
|
},
|
|
{
|
|
{ AIRPLAY_SEQ_SEND_TEXT, "SET_PARAMETER (text)", EVRTSP_REQ_SET_PARAMETER, payload_make_send_text, NULL, "application/x-dmap-tagged", NULL, true },
|
|
},
|
|
{
|
|
{ AIRPLAY_SEQ_SEND_PROGRESS, "SET_PARAMETER (progress)", EVRTSP_REQ_SET_PARAMETER, payload_make_send_progress, NULL, "text/parameters", NULL, true },
|
|
},
|
|
{
|
|
{ AIRPLAY_SEQ_SEND_ARTWORK, "SET_PARAMETER (artwork)", EVRTSP_REQ_SET_PARAMETER, payload_make_send_artwork, NULL, NULL, NULL, true },
|
|
},
|
|
{
|
|
{ AIRPLAY_SEQ_PAIR_SETUP, "pair setup 1", EVRTSP_REQ_POST, payload_make_pair_setup1, response_handler_pair_setup1, "application/octet-stream", "/pair-setup", false },
|
|
{ AIRPLAY_SEQ_PAIR_SETUP, "pair setup 2", EVRTSP_REQ_POST, payload_make_pair_setup2, response_handler_pair_setup2, "application/octet-stream", "/pair-setup", false },
|
|
{ AIRPLAY_SEQ_PAIR_SETUP, "pair setup 3", EVRTSP_REQ_POST, payload_make_pair_setup3, response_handler_pair_setup3, "application/octet-stream", "/pair-setup", false },
|
|
},
|
|
{
|
|
// Proceed on error is true because we want to delete the device key in the response handler if the verification fails
|
|
{ AIRPLAY_SEQ_PAIR_VERIFY, "pair verify 1", EVRTSP_REQ_POST, payload_make_pair_verify1, response_handler_pair_verify1, "application/octet-stream", "/pair-verify", true },
|
|
{ AIRPLAY_SEQ_PAIR_VERIFY, "pair verify 2", EVRTSP_REQ_POST, payload_make_pair_verify2, response_handler_pair_verify2, "application/octet-stream", "/pair-verify", false },
|
|
},
|
|
{
|
|
// Some devices (i.e. my ATV4) gives a 470 when trying transient, so we proceed on that so the handler can trigger PIN setup sequence
|
|
{ AIRPLAY_SEQ_PAIR_TRANSIENT, "pair setup 1", EVRTSP_REQ_POST, payload_make_pair_setup1, response_handler_pair_setup1, "application/octet-stream", "/pair-setup", true },
|
|
{ AIRPLAY_SEQ_PAIR_TRANSIENT, "pair setup 2", EVRTSP_REQ_POST, payload_make_pair_setup2, response_handler_pair_setup2, "application/octet-stream", "/pair-setup", false },
|
|
},
|
|
{
|
|
{ AIRPLAY_SEQ_FEEDBACK, "POST /feedback", EVRTSP_REQ_POST, NULL, NULL, NULL, "/feedback", true },
|
|
},
|
|
};
|
|
|
|
|
|
static void
|
|
sequence_continue_cb(struct evrtsp_request *req, void *arg)
|
|
{
|
|
struct airplay_seq_ctx *seq_ctx = arg;
|
|
struct airplay_seq_request *cur_request = seq_ctx->cur_request;
|
|
struct airplay_session *rs = seq_ctx->session;
|
|
enum airplay_seq_type seq_type;
|
|
|
|
rs->reqs_in_flight--;
|
|
if (!rs->reqs_in_flight)
|
|
evrtsp_connection_set_closecb(rs->ctrl, rtsp_close_cb, rs);
|
|
|
|
if (!req)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "No response to %s from '%s'\n", cur_request->name, rs->devname);
|
|
goto error;
|
|
}
|
|
|
|
if (req->response_code != RTSP_OK)
|
|
{
|
|
if (!cur_request->proceed_on_rtsp_not_ok)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Response to %s from '%s' was negative, aborting (%d %s)\n", cur_request->name, rs->devname, req->response_code, req->response_code_line);
|
|
goto error;
|
|
}
|
|
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Response to %s from '%s' was negative, proceeding anyway (%d %s)\n", cur_request->name, rs->devname, req->response_code, req->response_code_line);
|
|
}
|
|
|
|
// We don't check that the reply CSeq matches the request CSeq, because some
|
|
// targets like Reflector and AirFoil don't return the CSeq according to the
|
|
// rtsp spec. And the CSeq is not really important anyway.
|
|
|
|
if (cur_request->response_handler)
|
|
{
|
|
seq_type = cur_request->response_handler(req, rs);
|
|
if (seq_type != AIRPLAY_SEQ_CONTINUE)
|
|
{
|
|
if (seq_type == AIRPLAY_SEQ_ABORT)
|
|
goto error;
|
|
|
|
// Handler wanted to start a new sequence
|
|
sequence_start(seq_type, seq_ctx->session, seq_ctx->payload_make_arg, seq_ctx->log_caller);
|
|
free(seq_ctx);
|
|
return;
|
|
}
|
|
}
|
|
|
|
seq_ctx->cur_request++;
|
|
|
|
if (seq_ctx->cur_request->name)
|
|
{
|
|
sequence_continue(seq_ctx);
|
|
return;
|
|
}
|
|
|
|
if (seq_ctx->on_success)
|
|
seq_ctx->on_success(rs);
|
|
|
|
free(seq_ctx);
|
|
return;
|
|
|
|
error:
|
|
if (seq_ctx->on_error)
|
|
seq_ctx->on_error(rs);
|
|
|
|
free(seq_ctx);
|
|
}
|
|
|
|
static void
|
|
sequence_continue(struct airplay_seq_ctx *seq_ctx)
|
|
{
|
|
struct airplay_session *rs = seq_ctx->session;
|
|
struct airplay_seq_request *cur_request = seq_ctx->cur_request;
|
|
struct evrtsp_request *req = NULL;
|
|
const char *uri;
|
|
int ret;
|
|
|
|
req = evrtsp_request_new(sequence_continue_cb, seq_ctx);
|
|
if (!req)
|
|
goto error;
|
|
|
|
ret = request_headers_add(req, rs, cur_request->rtsp_type);
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
if (cur_request->content_type)
|
|
evrtsp_add_header(req->output_headers, "Content-Type", cur_request->content_type);
|
|
|
|
if (cur_request->payload_make)
|
|
{
|
|
ret = cur_request->payload_make(req, rs, seq_ctx->payload_make_arg);
|
|
if (ret > 0) // Skip to next request in sequence, if none -> error
|
|
{
|
|
seq_ctx->cur_request++;
|
|
if (!seq_ctx->cur_request->name)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Bug! payload_make signaled skip request, but there is nothing to skip to\n");
|
|
goto error;
|
|
}
|
|
|
|
evrtsp_request_free(req);
|
|
sequence_continue(seq_ctx);
|
|
return;
|
|
}
|
|
else if (ret < 0)
|
|
goto error;
|
|
}
|
|
|
|
uri = (cur_request->uri) ? cur_request->uri : rs->session_url;
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "%s: Sending %s to '%s'\n", seq_ctx->log_caller, cur_request->name, rs->devname);
|
|
|
|
ret = evrtsp_make_request(rs->ctrl, req, cur_request->rtsp_type, uri);
|
|
if (ret < 0)
|
|
goto error;
|
|
|
|
evrtsp_connection_set_closecb(rs->ctrl, NULL, NULL);
|
|
|
|
rs->reqs_in_flight++;
|
|
|
|
return;
|
|
|
|
error:
|
|
DPRINTF(E_LOG, L_AIRPLAY, "%s: Error sending %s to '%s'\n", seq_ctx->log_caller, cur_request->name, rs->devname);
|
|
|
|
if (req)
|
|
evrtsp_request_free(req);
|
|
|
|
// Sets status to FAILED, gives status to player and frees session. Must be
|
|
// deferred, otherwise sequence_start() could invalidate the session, meaning
|
|
// any dereference of the session by the caller after sequence_start() would
|
|
// segfault.
|
|
deferred_session_failure(rs);
|
|
|
|
free(seq_ctx);
|
|
}
|
|
|
|
// All errors that may occur during a sequence are called back async
|
|
static void
|
|
sequence_start(enum airplay_seq_type seq_type, struct airplay_session *rs, void *arg, const char *log_caller)
|
|
{
|
|
struct airplay_seq_ctx *seq_ctx;
|
|
|
|
CHECK_NULL(L_AIRPLAY, seq_ctx = calloc(1, sizeof(struct airplay_seq_ctx)));
|
|
|
|
seq_ctx->session = rs;
|
|
seq_ctx->cur_request = &airplay_seq_request[seq_type][0]; // First step of the sequence
|
|
seq_ctx->on_success = airplay_seq_definition[seq_type].on_success;
|
|
seq_ctx->on_error = airplay_seq_definition[seq_type].on_error;
|
|
seq_ctx->payload_make_arg = arg;
|
|
seq_ctx->log_caller = log_caller;
|
|
|
|
sequence_continue(seq_ctx); // Ownership transferred
|
|
}
|
|
|
|
|
|
/* ---------------- Airplay devices discovery - mDNS callback --------------- */
|
|
/* Thread: main (mdns) */
|
|
|
|
static int
|
|
features_parse(struct keyval *features_kv, const char *fs1, const char *fs2, const char *name)
|
|
{
|
|
uint64_t features;
|
|
int i, j;
|
|
|
|
if (safe_hextou32(fs1, (uint32_t *)&features) < 0 || safe_hextou32(fs2, ((uint32_t *)&features) + 1) < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "AirPlay '%s': unexpected features field in TXT record!\n", name);
|
|
return -1;
|
|
}
|
|
|
|
// Walk through the bits
|
|
for (i = 0; i < (sizeof(features) * CHAR_BIT); i++)
|
|
{
|
|
if (((features >> i) & 0x01) == 0)
|
|
continue;
|
|
|
|
// Check if we have it in the features map
|
|
for (j = 0; j < ARRAY_SIZE(features_map); j++)
|
|
{
|
|
if (i == features_map[j].bit)
|
|
{
|
|
DPRINTF(E_SPAM, L_AIRPLAY, "Speaker '%s' announced feature %d: '%s'\n", name, i, features_map[j].name);
|
|
keyval_add(features_kv, features_map[j].name, "1");
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (j == ARRAY_SIZE(features_map))
|
|
DPRINTF(E_SPAM, L_AIRPLAY, "Speaker '%s' announced feature %d: 'Unknown'\n", name, i);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
/* Examples of txt content:
|
|
* Airport Express 2:
|
|
["pk=7de...39" "gcgl=0" "gid=0fd...4" "pi=0fd...a4" "srcvers=366.0" "protovers=1.1" "serialNumber=C8...R" "manufacturer=Apple Inc." "model=AirPort10,115" "flags=0x4" "fv=p20.78100.3" "rsf=0x0" "features=0x445D0A00,0x1C340" "deviceid=74:1B:B2:D1:1A:B7" "acl=0"]
|
|
* Apple TV 4:
|
|
["vv=2" "osvers=14.2" "srcvers=525.38.42" "pk=c4e...c88" "psi=67C...DBC" "pi=b0b...da0" "protovers=1.1" "model=AppleTV5,3" "gcgl=1" "igl=1" "gid=B...73" "flags=0x244" "features=0x5A7FDFD5,0x3C155FDE" "fex=1d9/Wt5fFTw" "deviceid=AA:BB:CC:DD:EE:FF" "btaddr=D0:00:44:66:BB:66" "acl=0"]
|
|
* Roku
|
|
["pk=xxxxxxxxx” "gcgl=0" "gid=xxxxxxx” "psi=xxxxx” "pi=8A:71:CA:EF:xxxx" "srcvers=377.28.01" "protovers=1.1" "serialNumber=xxxxxxx” "manufacturer=Roku" "model=3810X" "flags=0x644" "at=0x3" "fv=p20.9.40.4190" "rsf=0x3" "features=0x7F8AD0,0x10BCF46" "deviceid=8A:71:CA:xxxxx” "acl=0"]
|
|
* Samsung TV
|
|
["pk=7xxxxxxxxxx” "gcgl=0" "gid=xxxxxxxxxxx” "psi=xxxxxxx” "pi=4C:6F:64:xxxxxxx” "srcvers=377.17.24.6" "protovers=1.1" "serialNumber=xxxxxxx” "manufacturer=Samsung" "model=UNU7090" "flags=0x244" "fv=p20.0.1" "rsf=0x3" "features=0x7F8AD0,0x38BCB46" "deviceid=64:1C:AE:xxxxx” "acl=0"]
|
|
* HomePod
|
|
["vv=2" "osvers=14.3" "srcvers=530.6" "pk=..." "psi=31...D3" "pi=fd...87" "protovers=1.1" "model=AudioAccessory1,1" "tsid=4...E" "gpn=name" "gcgl=1" "igl=1" "gid=4...E" "flags=0x1a404" "features=0x4A7FCA00,0x3C356BD0" "fex=AMp/StBrNTw" "deviceid=D4:...:C1" "btaddr=5E:...:F1" "acl=0"]
|
|
* Sonos Symfonisk
|
|
["pk=e5...1c" "gcgl=0" "gid=[uuid]" "pi=[uuid]" "srcvers=366.0" "protovers=1.1" "serialNumber=xx" "manufacturer=Sonos" "model=Bookshelf" "flags=0x4" "fv=p20.63.2-88230" "rsf=0x0" "features=0x445F8A00,0x1C340" "deviceid=11:22:33:44:55:66" "acl=0"]
|
|
*/
|
|
static void
|
|
airplay_device_cb(const char *name, const char *type, const char *domain, const char *hostname, int family, const char *address, int port, struct keyval *txt)
|
|
{
|
|
struct output_device *rd;
|
|
struct airplay_extra *re;
|
|
struct keyval features_kv = { 0 };
|
|
cfg_t *devcfg;
|
|
cfg_opt_t *cfgopt;
|
|
const char *p;
|
|
const char *nickname = NULL;
|
|
const char *features;
|
|
uint64_t id;
|
|
int ret;
|
|
|
|
if (port > 0)
|
|
{
|
|
p = keyval_get(txt, "deviceid");
|
|
if (!p)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "AirPlay device '%s' is missing a device ID\n", name);
|
|
return;
|
|
}
|
|
|
|
ret = device_id_colon_parse(&id, p);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not extract AirPlay device ID ('%s'): %s\n", name, p);
|
|
return;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
ret = device_id_find_byname(&id, name);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Could not remove, AirPlay device '%s' not in our list\n", name);
|
|
return;
|
|
}
|
|
}
|
|
|
|
DPRINTF(E_DBG, L_AIRPLAY, "Event for AirPlay device '%s' (port %d, id %" PRIx64 ")\n", name, port, id);
|
|
|
|
devcfg = cfg_gettsec(cfg, "airplay", name);
|
|
if (devcfg && cfg_getbool(devcfg, "exclude"))
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Excluding AirPlay device '%s' as set in config\n", name);
|
|
return;
|
|
}
|
|
if (devcfg && cfg_getbool(devcfg, "permanent") && (port < 0))
|
|
{
|
|
DPRINTF(E_INFO, L_AIRPLAY, "AirPlay device '%s' disappeared, but set as permanent in config\n", name);
|
|
return;
|
|
}
|
|
if (devcfg && cfg_getstr(devcfg, "nickname"))
|
|
{
|
|
nickname = cfg_getstr(devcfg, "nickname");
|
|
}
|
|
|
|
CHECK_NULL(L_AIRPLAY, rd = calloc(1, sizeof(struct output_device)));
|
|
CHECK_NULL(L_AIRPLAY, re = calloc(1, sizeof(struct airplay_extra)));
|
|
|
|
rd->id = id;
|
|
rd->name = nickname ? strdup(nickname) : strdup(name);
|
|
re->mdns_name = strdup(name); // Used for identifying device when it disappears
|
|
rd->type = OUTPUT_TYPE_AIRPLAY;
|
|
rd->type_name = outputs_name(rd->type);
|
|
rd->extra_device_info = re;
|
|
|
|
if (port < 0)
|
|
{
|
|
// Device stopped advertising
|
|
switch (family)
|
|
{
|
|
case AF_INET:
|
|
rd->v4_port = 1;
|
|
break;
|
|
|
|
case AF_INET6:
|
|
rd->v6_port = 1;
|
|
break;
|
|
}
|
|
|
|
ret = player_device_remove(rd);
|
|
if (ret < 0)
|
|
goto free_rd;
|
|
|
|
return;
|
|
}
|
|
|
|
// Features, see features_map[]
|
|
features = keyval_get(txt, "features");
|
|
if (!features || !strchr(features, ','))
|
|
{
|
|
DPRINTF(E_WARN, L_AIRPLAY, "Not using AirPlay 2 for device '%s' as it does not have required 'features' in TXT field\n", name);
|
|
goto free_rd;
|
|
}
|
|
|
|
ret = features_parse(&features_kv, features, strchr(features, ',') + 1, name);
|
|
if (ret < 0)
|
|
goto free_rd;
|
|
|
|
if (!keyval_get(&features_kv, "SupportsAirPlayAudio"))
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "AirPlay device '%s' does not support audio\n", name);
|
|
goto free_rd;
|
|
}
|
|
|
|
if (keyval_get(&features_kv, "MetadataFeatures_0"))
|
|
re->wanted_metadata |= AIRPLAY_MD_WANTS_ARTWORK;
|
|
if (keyval_get(&features_kv, "MetadataFeatures_1"))
|
|
re->wanted_metadata |= AIRPLAY_MD_WANTS_PROGRESS;
|
|
if (keyval_get(&features_kv, "MetadataFeatures_2"))
|
|
re->wanted_metadata |= AIRPLAY_MD_WANTS_TEXT;
|
|
if (keyval_get(&features_kv, "Authentication_8"))
|
|
re->supports_auth_setup = 1;
|
|
|
|
if (keyval_get(&features_kv, "SupportsSystemPairing") || keyval_get(&features_kv, "SupportsCoreUtilsPairingAndEncryption"))
|
|
re->supports_pairing_transient = 1;
|
|
else if (keyval_get(&features_kv, "SupportsHKPairingAndAccessControl"))
|
|
rd->requires_auth = 1;
|
|
|
|
keyval_clear(&features_kv);
|
|
|
|
// Only default audio quality supported so far
|
|
rd->quality.sample_rate = AIRPLAY_QUALITY_SAMPLE_RATE_DEFAULT;
|
|
rd->quality.bits_per_sample = AIRPLAY_QUALITY_BITS_PER_SAMPLE_DEFAULT;
|
|
rd->quality.channels = AIRPLAY_QUALITY_CHANNELS_DEFAULT;
|
|
|
|
if (!quality_is_equal(&rd->quality, &airplay_quality_default))
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Device '%s' requested non-default audio quality (%d/%d/%d)\n", rd->name, rd->quality.sample_rate, rd->quality.bits_per_sample, rd->quality.channels);
|
|
|
|
// Device type
|
|
re->devtype = AIRPLAY_DEV_OTHER;
|
|
p = keyval_get(txt, "model");
|
|
|
|
if (!p)
|
|
re->devtype = AIRPLAY_DEV_OTHER;
|
|
else if (strncmp(p, "AirPort4", strlen("AirPort4")) == 0)
|
|
re->devtype = AIRPLAY_DEV_APEX2_80211N; // Second generation
|
|
else if (strncmp(p, "AirPort", strlen("AirPort")) == 0)
|
|
re->devtype = AIRPLAY_DEV_APEX3_80211N; // Third generation and newer
|
|
else if (strncmp(p, "AppleTV5,3", strlen("AppleTV5,3")) == 0)
|
|
re->devtype = AIRPLAY_DEV_APPLETV4; // Stream to ATV with tvOS 10 needs to be kept alive
|
|
else if (strncmp(p, "AppleTV", strlen("AppleTV")) == 0)
|
|
re->devtype = AIRPLAY_DEV_APPLETV;
|
|
else if (strncmp(p, "AudioAccessory", strlen("AudioAccessory")) == 0)
|
|
re->devtype = AIRPLAY_DEV_HOMEPOD;
|
|
else if (*p == '\0')
|
|
DPRINTF(E_LOG, L_AIRPLAY, "AirPlay device '%s': am has no value\n", name);
|
|
|
|
// If the user didn't set any reconnect setting we enable for Apple TV and
|
|
// HomePods due to https://github.com/owntone/owntone-server/issues/734
|
|
cfgopt = devcfg ? cfg_getopt(devcfg, "reconnect") : NULL;
|
|
if (cfgopt && cfgopt->nvalues == 1)
|
|
rd->resurrect = cfg_opt_getnbool(cfgopt, 0);
|
|
else
|
|
rd->resurrect = (re->devtype == AIRPLAY_DEV_APPLETV4) || (re->devtype == AIRPLAY_DEV_HOMEPOD);
|
|
|
|
switch (family)
|
|
{
|
|
case AF_INET:
|
|
rd->v4_address = strdup(address);
|
|
rd->v4_port = port;
|
|
DPRINTF(E_INFO, L_AIRPLAY, "Adding AirPlay device '%s': features %s, type %s, address %s:%d\n",
|
|
name, features, airplay_devtype[re->devtype], address, port);
|
|
break;
|
|
|
|
case AF_INET6:
|
|
rd->v6_address = strdup(address);
|
|
rd->v6_port = port;
|
|
DPRINTF(E_INFO, L_AIRPLAY, "Adding AirPlay device '%s': features %s, type %s, address [%s]:%d\n",
|
|
name, features, airplay_devtype[re->devtype], address, port);
|
|
break;
|
|
|
|
default:
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Error: AirPlay device '%s' has neither ipv4 og ipv6 address\n", name);
|
|
goto free_rd;
|
|
}
|
|
|
|
ret = player_device_add(rd);
|
|
if (ret < 0)
|
|
goto free_rd;
|
|
|
|
return;
|
|
|
|
free_rd:
|
|
outputs_device_free(rd);
|
|
keyval_clear(&features_kv);
|
|
}
|
|
|
|
|
|
/* ---------------------------- Module definitions -------------------------- */
|
|
/* Thread: player */
|
|
|
|
static int
|
|
airplay_device_probe(struct output_device *device, int callback_id)
|
|
{
|
|
struct airplay_session *rs;
|
|
|
|
rs = session_make(device, callback_id);
|
|
if (!rs)
|
|
return -1;
|
|
|
|
sequence_start(AIRPLAY_SEQ_PROBE, rs, NULL, "device_probe");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
airplay_device_start(struct output_device *device, int callback_id)
|
|
{
|
|
struct airplay_session *rs;
|
|
|
|
rs = session_make(device, callback_id);
|
|
if (!rs)
|
|
return -1;
|
|
|
|
sequence_start(AIRPLAY_SEQ_START, rs, NULL, "device_start");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
airplay_device_stop(struct output_device *device, int callback_id)
|
|
{
|
|
struct airplay_session *rs = device->session;
|
|
|
|
rs->callback_id = callback_id;
|
|
|
|
sequence_start(AIRPLAY_SEQ_STOP, rs, NULL, "device_stop");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static int
|
|
airplay_device_flush(struct output_device *device, int callback_id)
|
|
{
|
|
struct airplay_session *rs = device->session;
|
|
|
|
if (rs->state != AIRPLAY_STATE_STREAMING)
|
|
return 0; // No-op, nothing to flush
|
|
|
|
rs->callback_id = callback_id;
|
|
|
|
sequence_start(AIRPLAY_SEQ_FLUSH, rs, NULL, "flush");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
airplay_device_cb_set(struct output_device *device, int callback_id)
|
|
{
|
|
struct airplay_session *rs = device->session;
|
|
|
|
rs->callback_id = callback_id;
|
|
}
|
|
|
|
static void
|
|
airplay_device_free_extra(struct output_device *device)
|
|
{
|
|
struct airplay_extra *re = device->extra_device_info;
|
|
|
|
free(re->mdns_name);
|
|
free(re);
|
|
}
|
|
|
|
static int
|
|
airplay_device_authorize(struct output_device *device, const char *pin, int callback_id)
|
|
{
|
|
struct airplay_session *rs;
|
|
|
|
// Make a session so we can communicate with the device
|
|
rs = session_make(device, callback_id);
|
|
if (!rs)
|
|
return -1;
|
|
|
|
sequence_start(AIRPLAY_SEQ_PAIR_SETUP, rs, (void *)pin, "device_authorize");
|
|
|
|
return 1;
|
|
}
|
|
|
|
static void
|
|
airplay_write(struct output_buffer *obuf)
|
|
{
|
|
struct airplay_master_session *rms;
|
|
struct airplay_session *rs;
|
|
int i;
|
|
|
|
for (rms = airplay_master_sessions; rms; rms = rms->next)
|
|
{
|
|
for (i = 0; obuf->data[i].buffer; i++)
|
|
{
|
|
if (!quality_is_equal(&obuf->data[i].quality, &rms->rtp_session->quality))
|
|
continue;
|
|
|
|
// Set rms->cur_stamp, which involves a calculation of which session
|
|
// rtptime corresponds to the pts we are given by the player.
|
|
timestamp_set(rms, obuf->pts);
|
|
|
|
// Sends sync packets to new sessions, and if it is sync time then also to old sessions
|
|
packets_sync_send(rms);
|
|
|
|
// TODO avoid this copy
|
|
evbuffer_add(rms->input_buffer, obuf->data[i].buffer, obuf->data[i].bufsize);
|
|
rms->input_buffer_samples += obuf->data[i].samples;
|
|
|
|
// Send as many packets as we have data for (one packet requires rawbuf_size bytes)
|
|
while (evbuffer_get_length(rms->input_buffer) >= rms->rawbuf_size)
|
|
{
|
|
evbuffer_remove(rms->input_buffer, rms->rawbuf, rms->rawbuf_size);
|
|
rms->input_buffer_samples -= rms->samples_per_packet;
|
|
|
|
packets_send(rms);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Check for devices that have joined since last write (we have already sent them
|
|
// initialization sync and rtp packets via packets_sync_send and packets_send)
|
|
for (rs = airplay_sessions; rs; rs = rs->next)
|
|
{
|
|
if (rs->state != AIRPLAY_STATE_CONNECTED)
|
|
continue;
|
|
|
|
// Start sending progress to keep ATV's alive
|
|
if (!event_pending(keep_alive_timer, EV_TIMEOUT, NULL))
|
|
evtimer_add(keep_alive_timer, &keep_alive_tv);
|
|
|
|
rs->state = AIRPLAY_STATE_STREAMING;
|
|
// Make a cb?
|
|
}
|
|
}
|
|
|
|
static int
|
|
airplay_init(void)
|
|
{
|
|
int ret;
|
|
int i;
|
|
int timing_port;
|
|
int control_port;
|
|
|
|
airplay_device_id = libhash;
|
|
|
|
// Check alignment of enum seq_type with airplay_seq_definition and
|
|
// airplay_seq_request
|
|
for (i = 0; i < ARRAY_SIZE(airplay_seq_definition); i++)
|
|
{
|
|
if (airplay_seq_definition[i].seq_type != i || airplay_seq_request[i][0].seq_type != i)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Bug! Misalignment between sequence enum and structs: %d, %d, %d\n", i, airplay_seq_definition[i].seq_type, airplay_seq_request[i][0].seq_type);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
CHECK_NULL(L_AIRPLAY, keep_alive_timer = evtimer_new(evbase_player, airplay_keep_alive_timer_cb, NULL));
|
|
|
|
timing_port = cfg_getint(cfg_getsec(cfg, "airplay_shared"), "timing_port");
|
|
ret = service_start(&airplay_timing_svc, timing_svc_cb, timing_port, "AirPlay timing");
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "AirPlay time synchronization failed to start\n");
|
|
goto out_free_timer;
|
|
}
|
|
|
|
control_port = cfg_getint(cfg_getsec(cfg, "airplay_shared"), "control_port");
|
|
ret = service_start(&airplay_control_svc, control_svc_cb, control_port, "AirPlay control");
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "AirPlay playback control failed to start\n");
|
|
goto out_stop_timing;
|
|
}
|
|
|
|
ret = airplay_events_init();
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "AirPlay events failed to start\n");
|
|
goto out_stop_control;
|
|
}
|
|
|
|
ret = mdns_browse("_airplay._tcp", airplay_device_cb, MDNS_CONNECTION_TEST);
|
|
if (ret < 0)
|
|
{
|
|
DPRINTF(E_LOG, L_AIRPLAY, "Could not add mDNS browser for AirPlay devices\n");
|
|
goto out_stop_events;
|
|
}
|
|
|
|
return 0;
|
|
|
|
out_stop_events:
|
|
airplay_events_deinit();
|
|
out_stop_control:
|
|
service_stop(&airplay_control_svc);
|
|
out_stop_timing:
|
|
service_stop(&airplay_timing_svc);
|
|
out_free_timer:
|
|
event_free(keep_alive_timer);
|
|
|
|
return -1;
|
|
}
|
|
|
|
static void
|
|
airplay_deinit(void)
|
|
{
|
|
struct airplay_session *rs;
|
|
|
|
airplay_events_deinit();
|
|
service_stop(&airplay_control_svc);
|
|
service_stop(&airplay_timing_svc);
|
|
|
|
event_free(keep_alive_timer);
|
|
|
|
for (rs = airplay_sessions; airplay_sessions; rs = airplay_sessions)
|
|
{
|
|
airplay_sessions = rs->next;
|
|
|
|
session_free(rs);
|
|
}
|
|
}
|
|
|
|
struct output_definition output_airplay =
|
|
{
|
|
.name = "AirPlay 2",
|
|
.type = OUTPUT_TYPE_AIRPLAY,
|
|
#ifdef PREFER_AIRPLAY2
|
|
.priority = 1,
|
|
#else
|
|
.priority = 2,
|
|
#endif
|
|
.disabled = 0,
|
|
.init = airplay_init,
|
|
.deinit = airplay_deinit,
|
|
.device_start = airplay_device_start,
|
|
.device_stop = airplay_device_stop,
|
|
.device_flush = airplay_device_flush,
|
|
.device_probe = airplay_device_probe,
|
|
.device_cb_set = airplay_device_cb_set,
|
|
.device_free_extra = airplay_device_free_extra,
|
|
.device_volume_set = airplay_set_volume_one,
|
|
.device_volume_to_pct = airplay_volume_to_pct,
|
|
.write = airplay_write,
|
|
.metadata_prepare = airplay_metadata_prepare,
|
|
.metadata_send = airplay_metadata_send,
|
|
.metadata_purge = airplay_metadata_purge,
|
|
.device_authorize = airplay_device_authorize,
|
|
};
|