201 lines
8.3 KiB
C
201 lines
8.3 KiB
C
/*
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* Apple AirPlay 2 Event Receiver. This file is part of Shairport Sync.
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* Copyright (c) Mike Brady 2014--2025
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "ap2_event_receiver.h"
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#include "bonjour_strings.h"
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#include "common.h"
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#include "player.h"
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#include "ptp-utilities.h"
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#include "rtsp.h"
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#include "utilities/structured_buffer.h"
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void ap2_event_receiver_cleanup_handler(void *arg) {
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rtsp_conn_info *conn = (rtsp_conn_info *)arg;
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debug(1, "Connection %d: AP2 Event Receiver Cleanup start.", conn->connection_number);
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// only update these things if you're (still) the principal conn
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#ifdef CONFIG_METADATA
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// this is here to ensure it's only performed once during a teardown of a ptp stream
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send_ssnc_metadata('disc', conn->client_ip_string, strlen(conn->client_ip_string), 1);
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#endif
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if (conn->airplay_gid != NULL) {
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free(conn->airplay_gid);
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conn->airplay_gid = NULL;
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}
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conn->groupContainsGroupLeader = 0;
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if (conn->dacp_active_remote != NULL) {
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free(conn->dacp_active_remote);
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conn->dacp_active_remote = NULL;
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}
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if (conn->ap2_client_name) {
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free(conn->ap2_client_name);
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conn->ap2_client_name = NULL;
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}
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pthread_rwlock_wrlock(&principal_conn_lock); // don't let the principal_conn be changed
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pthread_cleanup_push(rwlock_unlock, (void *)&principal_conn_lock);
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if (principal_conn == conn) {
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config.airplay_statusflags &= (0xffffffff - (1 << 11)); // DeviceSupportsRelay
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build_bonjour_strings(conn);
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debug(1, "Connection %d: SETUP mdns_update on %s.", conn->connection_number,
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get_category_string(conn->airplay_stream_category));
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mdns_update(NULL, secondary_txt_records);
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principal_conn = NULL;
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}
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pthread_cleanup_pop(1); // release the principal_conn lock
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debug(1, "Connection %d: AP2 Event Receiver Cleanup exit.", conn->connection_number);
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}
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void *ap2_event_receiver(void *arg) {
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// #include <syscall.h>
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// debug(1, "rtp_event_receiver PID %d", syscall(SYS_gettid));
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rtsp_conn_info *conn = (rtsp_conn_info *)arg;
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debug(2, "Connection %d: AP2 Event Receiver started", conn->connection_number);
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structured_buffer *sbuf = sbuf_new(4096);
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if (sbuf != NULL) {
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pthread_cleanup_push(sbuf_cleanup, sbuf);
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// only update these things if you're (still) the principal conn
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pthread_rwlock_wrlock(&principal_conn_lock); // don't let the principal_conn be changed
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pthread_cleanup_push(rwlock_unlock, (void *)&principal_conn_lock);
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if (principal_conn == conn) {
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config.airplay_statusflags |= 1 << 11; // DeviceSupportsRelay
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// config.airplay_statusflags |= 1 << 17; // ReceiverSessionIsActive
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build_bonjour_strings(conn);
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debug(2, "Connection %d: SETUP mdns_update on %s.", conn->connection_number,
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get_category_string(conn->airplay_stream_category));
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mdns_update(NULL, secondary_txt_records);
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}
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pthread_cleanup_pop(1); // release the principal_conn lock
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pthread_cleanup_push(ap2_event_receiver_cleanup_handler, arg);
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// listen(conn->event_socket, 5); // this is now done in the handle_setup_2 code
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uint8_t packet[4096];
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ssize_t nread;
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SOCKADDR remote_addr;
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memset(&remote_addr, 0, sizeof(remote_addr));
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socklen_t addr_size = sizeof(remote_addr);
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int fd = accept(conn->event_socket, (struct sockaddr *)&remote_addr, &addr_size);
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debug(2,
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"Connection %d: ap2_event_receiver accepted a connection on socket %d and moved to a new "
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"socket %d.",
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conn->connection_number, conn->event_socket, fd);
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intptr_t pfd = fd;
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pthread_cleanup_push(socket_cleanup, (void *)pfd);
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int finished = 0;
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do {
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plist_t value_plist = generateInfoPlist(conn);
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if (value_plist != NULL) {
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void *txtData = NULL;
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size_t txtDataLength = 0;
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generateTxtDataValueInfo(conn, &txtData, &txtDataLength);
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plist_dict_set_item(value_plist, "txtAirPlay", plist_new_data(txtData, txtDataLength));
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free(txtData);
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plist_t update_info_plist = plist_new_dict();
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if (update_info_plist != NULL) {
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plist_dict_set_item(update_info_plist, "type", plist_new_string("updateInfo"));
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plist_dict_set_item(update_info_plist, "value", value_plist);
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char *plistString = NULL;
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uint32_t plistStringLength = 0;
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plist_to_bin(update_info_plist, &plistString, &plistStringLength);
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if (plistString != NULL) {
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char *plist_as_string = plist_as_xml_text(update_info_plist);
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if (plist_as_string != NULL) {
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debug(3, "Plist is: \"%s\".", plist_as_string);
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free(plist_as_string);
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}
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sbuf_printf(sbuf, "POST /command RTSP/1.0\r\nContent-Length: %u\r\n",
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plistStringLength);
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sbuf_printf(sbuf, "Content-Type: application/x-apple-binary-plist\r\n\r\n");
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sbuf_append(sbuf, plistString, plistStringLength);
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free(plistString); // should be plist_to_bin_free, but it's not defined in older
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// libraries
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char *b = 0;
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size_t l = 0;
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sbuf_buf_and_length(sbuf, &b, &l);
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ssize_t wres =
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write_encrypted(fd, &conn->ap2_pairing_context.event_cipher_bundle, b, l);
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if ((wres == -1) || ((size_t)wres != l))
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debug(1, "Encrypted write error");
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sbuf_clear(sbuf);
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} else {
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debug(1, "plist string not created!");
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}
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plist_free(update_info_plist);
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} else {
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debug(1, "Could not build an updateInfo plist");
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}
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// plist_free(value_plist);
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} else {
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debug(1, "Could not build an value plist");
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}
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while (finished == 0) {
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nread = read_encrypted(fd, &conn->ap2_pairing_context.event_cipher_bundle, packet,
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sizeof(packet));
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// nread = recv(fd, packet, sizeof(packet), 0);
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if (nread < 0) {
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char errorstring[1024];
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strerror_r(errno, (char *)errorstring, sizeof(errorstring));
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debug(1,
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"Connection %d: error in ap2_event_receiver %d: \"%s\". Could not recv a packet.",
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conn->connection_number, errno, errorstring);
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// if ((config.diagnostic_drop_packet_fraction == 0.0) ||
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// (drand48() > config.diagnostic_drop_packet_fraction)) {
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} else if (nread > 0) {
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// ssize_t plen = nread;
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packet[nread] = '\0';
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debug(3, "Connection %d: Packet Received on Event Port with contents: \"%s\".",
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conn->connection_number, packet);
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} else {
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debug(1, "Connection %d: Event Port connection closed by client",
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conn->connection_number);
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finished = 1;
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}
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}
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} while (finished == 0);
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debug(1, "Connection %d: AP2 Event Receiver RTP thread starting \"normal\" exit.",
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conn->connection_number);
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pthread_cleanup_pop(1); // close the socket
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pthread_cleanup_pop(1); // do the cleanup
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pthread_cleanup_pop(1); // delete the structured buffer
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debug(1, "Connection %d: AP2 Event Receiver RTP thread \"normal\" exit.",
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conn->connection_number);
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} else {
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debug(1, "Could not allocate a structured buffer!");
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}
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conn->ap2_event_receiver_exited = 1;
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pthread_exit(NULL);
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}
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