mirror of
https://github.com/LizardByte/Sunshine.git
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a6d295b273
If we don't wait, clients may fail control stream establishment if the app terminates early.
1702 lines
56 KiB
C++
1702 lines
56 KiB
C++
// Created by loki on 6/5/19.
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#include "process.h"
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#include <future>
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#include <queue>
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#include <fstream>
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#include <openssl/err.h>
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#include <boost/endian/arithmetic.hpp>
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extern "C" {
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#include <moonlight-common-c/src/RtpAudioQueue.h>
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#include <moonlight-common-c/src/Video.h>
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#include <rs.h>
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}
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#include "config.h"
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#include "input.h"
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#include "main.h"
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#include "network.h"
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#include "stat_trackers.h"
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#include "stream.h"
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#include "sync.h"
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#include "thread_safe.h"
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#include "utility.h"
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#define IDX_START_A 0
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#define IDX_START_B 1
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#define IDX_INVALIDATE_REF_FRAMES 2
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#define IDX_LOSS_STATS 3
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#define IDX_INPUT_DATA 5
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#define IDX_RUMBLE_DATA 6
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#define IDX_TERMINATION 7
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#define IDX_PERIODIC_PING 8
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#define IDX_REQUEST_IDR_FRAME 9
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#define IDX_ENCRYPTED 10
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#define IDX_HDR_MODE 11
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static const short packetTypes[] = {
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0x0305, // Start A
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0x0307, // Start B
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0x0301, // Invalidate reference frames
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0x0201, // Loss Stats
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0x0204, // Frame Stats (unused)
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0x0206, // Input data
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0x010b, // Rumble data
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0x0109, // Termination
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0x0200, // Periodic Ping
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0x0302, // IDR frame
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0x0001, // fully encrypted
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0x010e, // HDR mode
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};
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namespace asio = boost::asio;
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namespace sys = boost::system;
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using asio::ip::tcp;
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using asio::ip::udp;
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using namespace std::literals;
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namespace stream {
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enum class socket_e : int {
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video,
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audio
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};
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#pragma pack(push, 1)
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struct video_short_frame_header_t {
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uint8_t *
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payload() {
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return (uint8_t *) (this + 1);
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}
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std::uint8_t headerType; // Always 0x01 for short headers
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// Sunshine extension
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// Frame processing latency, in 1/10 ms units
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// zero when the frame is repeated or there is no backend implementation
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boost::endian::little_uint16_at frame_processing_latency;
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// Currently known values:
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// 1 = Normal P-frame
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// 2 = IDR-frame
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// 4 = P-frame with intra-refresh blocks
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// 5 = P-frame after reference frame invalidation
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std::uint8_t frameType;
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std::uint8_t unknown2[4];
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};
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static_assert(
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sizeof(video_short_frame_header_t) == 8,
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"Short frame header must be 8 bytes");
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struct video_packet_raw_t {
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uint8_t *
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payload() {
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return (uint8_t *) (this + 1);
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}
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RTP_PACKET rtp;
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char reserved[4];
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NV_VIDEO_PACKET packet;
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};
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struct audio_packet_raw_t {
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uint8_t *
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payload() {
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return (uint8_t *) (this + 1);
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}
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RTP_PACKET rtp;
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};
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struct control_header_v2 {
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std::uint16_t type;
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std::uint16_t payloadLength;
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uint8_t *
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payload() {
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return (uint8_t *) (this + 1);
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}
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};
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struct control_terminate_t {
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control_header_v2 header;
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std::uint32_t ec;
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};
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struct control_rumble_t {
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control_header_v2 header;
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std::uint32_t useless;
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std::uint16_t id;
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std::uint16_t lowfreq;
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std::uint16_t highfreq;
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};
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struct control_hdr_mode_t {
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control_header_v2 header;
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std::uint8_t enabled;
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// Sunshine protocol extension
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SS_HDR_METADATA metadata;
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};
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typedef struct control_encrypted_t {
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std::uint16_t encryptedHeaderType; // Always LE 0x0001
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std::uint16_t length; // sizeof(seq) + 16 byte tag + secondary header and data
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// seq is accepted as an arbitrary value in Moonlight
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std::uint32_t seq; // Monotonically increasing sequence number (used as IV for AES-GCM)
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uint8_t *
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payload() {
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return (uint8_t *) (this + 1);
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}
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// encrypted control_header_v2 and payload data follow
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} *control_encrypted_p;
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struct audio_fec_packet_raw_t {
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uint8_t *
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payload() {
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return (uint8_t *) (this + 1);
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}
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RTP_PACKET rtp;
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AUDIO_FEC_HEADER fecHeader;
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};
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#pragma pack(pop)
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constexpr std::size_t
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round_to_pkcs7_padded(std::size_t size) {
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return ((size + 15) / 16) * 16;
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}
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constexpr std::size_t MAX_AUDIO_PACKET_SIZE = 1400;
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using rh_t = util::safe_ptr<reed_solomon, reed_solomon_release>;
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using video_packet_t = util::c_ptr<video_packet_raw_t>;
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using audio_packet_t = util::c_ptr<audio_packet_raw_t>;
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using audio_fec_packet_t = util::c_ptr<audio_fec_packet_raw_t>;
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using audio_aes_t = std::array<char, round_to_pkcs7_padded(MAX_AUDIO_PACKET_SIZE)>;
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using message_queue_t = std::shared_ptr<safe::queue_t<std::pair<std::uint16_t, std::string>>>;
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using message_queue_queue_t = std::shared_ptr<safe::queue_t<std::tuple<socket_e, asio::ip::address, message_queue_t>>>;
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// return bytes written on success
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// return -1 on error
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static inline int
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encode_audio(int featureSet, const audio::buffer_t &plaintext, audio_packet_t &destination, std::uint32_t avRiKeyIv, crypto::cipher::cbc_t &cbc) {
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// If encryption isn't enabled
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if (!(featureSet & 0x20)) {
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std::copy(std::begin(plaintext), std::end(plaintext), destination->payload());
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return plaintext.size();
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}
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crypto::aes_t iv {};
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*(std::uint32_t *) iv.data() = util::endian::big<std::uint32_t>(avRiKeyIv + destination->rtp.sequenceNumber);
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return cbc.encrypt(std::string_view { (char *) std::begin(plaintext), plaintext.size() }, destination->payload(), &iv);
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}
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static inline void
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while_starting_do_nothing(std::atomic<session::state_e> &state) {
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while (state.load(std::memory_order_acquire) == session::state_e::STARTING) {
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std::this_thread::sleep_for(1ms);
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}
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}
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class control_server_t {
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public:
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int
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bind(std::uint16_t port) {
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_host = net::host_create(_addr, config::stream.channels, port);
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return !(bool) _host;
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}
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void
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emplace_addr_to_session(const std::string &addr, session_t &session) {
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auto lg = _map_addr_session.lock();
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_map_addr_session->emplace(addr, std::make_pair(0u, &session));
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}
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// Get session associated with address.
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// If none are found, try to find a session not yet claimed. (It will be marked by a port of value 0
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// If none of those are found, return nullptr
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session_t *
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get_session(const net::peer_t peer);
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// Circular dependency:
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// iterate refers to session
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// session refers to broadcast_ctx_t
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// broadcast_ctx_t refers to control_server_t
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// Therefore, iterate is implemented further down the source file
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void
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iterate(std::chrono::milliseconds timeout);
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void
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call(std::uint16_t type, session_t *session, const std::string_view &payload);
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void
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map(uint16_t type, std::function<void(session_t *, const std::string_view &)> cb) {
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_map_type_cb.emplace(type, std::move(cb));
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}
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int
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send(const std::string_view &payload, net::peer_t peer) {
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auto packet = enet_packet_create(payload.data(), payload.size(), ENET_PACKET_FLAG_RELIABLE);
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if (enet_peer_send(peer, 0, packet)) {
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enet_packet_destroy(packet);
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return -1;
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}
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return 0;
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}
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void
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flush() {
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enet_host_flush(_host.get());
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}
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// Callbacks
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std::unordered_map<std::uint16_t, std::function<void(session_t *, const std::string_view &)>> _map_type_cb;
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// Mapping ip:port to session
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sync_util::sync_t<std::unordered_multimap<std::string, std::pair<std::uint16_t, session_t *>>> _map_addr_session;
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ENetAddress _addr;
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net::host_t _host;
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};
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struct broadcast_ctx_t {
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message_queue_queue_t message_queue_queue;
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std::thread recv_thread;
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std::thread video_thread;
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std::thread audio_thread;
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std::thread control_thread;
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asio::io_service io;
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udp::socket video_sock { io };
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udp::socket audio_sock { io };
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// This is purely for administrative purposes.
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// It's possible two instances of Moonlight are behind a NAT.
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// From Sunshine's point of view, the ip addresses are identical
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// We need some way to know what ports are already used for different streams
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sync_util::sync_t<std::vector<std::pair<std::string, std::uint16_t>>> audio_video_connections;
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control_server_t control_server;
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};
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struct session_t {
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config_t config;
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safe::mail_t mail;
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std::shared_ptr<input::input_t> input;
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std::thread audioThread;
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std::thread videoThread;
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std::chrono::steady_clock::time_point pingTimeout;
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safe::shared_t<broadcast_ctx_t>::ptr_t broadcast_ref;
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struct {
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int lowseq;
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udp::endpoint peer;
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safe::mail_raw_t::event_t<bool> idr_events;
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std::unique_ptr<platf::deinit_t> qos;
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} video;
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struct {
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crypto::cipher::cbc_t cipher;
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std::uint16_t sequenceNumber;
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// avRiKeyId == util::endian::big(First (sizeof(avRiKeyId)) bytes of launch_session->iv)
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std::uint32_t avRiKeyId;
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std::uint32_t timestamp;
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udp::endpoint peer;
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util::buffer_t<char> shards;
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util::buffer_t<uint8_t *> shards_p;
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audio_fec_packet_t fec_packet;
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std::unique_ptr<platf::deinit_t> qos;
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} audio;
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struct {
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crypto::cipher::gcm_t cipher;
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crypto::aes_t iv;
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net::peer_t peer;
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std::uint8_t seq;
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platf::rumble_queue_t rumble_queue;
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safe::mail_raw_t::event_t<video::hdr_info_t> hdr_queue;
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} control;
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safe::mail_raw_t::event_t<bool> shutdown_event;
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safe::signal_t controlEnd;
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std::atomic<session::state_e> state;
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};
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/**
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* First part of cipher must be struct of type control_encrypted_t
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*
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* returns empty string_view on failure
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* returns string_view pointing to payload data
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*/
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template <std::size_t max_payload_size>
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static inline std::string_view
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encode_control(session_t *session, const std::string_view &plaintext, std::array<std::uint8_t, max_payload_size> &tagged_cipher) {
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static_assert(
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max_payload_size >= sizeof(control_encrypted_t) + sizeof(crypto::cipher::tag_size),
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"max_payload_size >= sizeof(control_encrypted_t) + sizeof(crypto::cipher::tag_size)");
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if (session->config.controlProtocolType != 13) {
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return plaintext;
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}
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crypto::aes_t iv {};
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auto seq = session->control.seq++;
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iv[0] = seq;
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auto packet = (control_encrypted_p) tagged_cipher.data();
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auto bytes = session->control.cipher.encrypt(plaintext, packet->payload(), &iv);
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if (bytes <= 0) {
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BOOST_LOG(error) << "Couldn't encrypt control data"sv;
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return {};
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}
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std::uint16_t packet_length = bytes + crypto::cipher::tag_size + sizeof(control_encrypted_t::seq);
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packet->encryptedHeaderType = util::endian::little(0x0001);
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packet->length = util::endian::little(packet_length);
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packet->seq = util::endian::little(seq);
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return std::string_view { (char *) tagged_cipher.data(), packet_length + sizeof(control_encrypted_t) - sizeof(control_encrypted_t::seq) };
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}
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int
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start_broadcast(broadcast_ctx_t &ctx);
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void
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end_broadcast(broadcast_ctx_t &ctx);
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static auto broadcast = safe::make_shared<broadcast_ctx_t>(start_broadcast, end_broadcast);
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session_t *
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control_server_t::get_session(const net::peer_t peer) {
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TUPLE_2D(port, addr_string, platf::from_sockaddr_ex((sockaddr *) &peer->address.address));
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auto lg = _map_addr_session.lock();
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TUPLE_2D(begin, end, _map_addr_session->equal_range(addr_string));
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auto it = std::end(_map_addr_session.raw);
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for (auto pos = begin; pos != end; ++pos) {
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TUPLE_2D_REF(session_port, session_p, pos->second);
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if (port == session_port) {
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return session_p;
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}
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else if (session_port == 0) {
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it = pos;
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}
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}
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if (it != std::end(_map_addr_session.raw)) {
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TUPLE_2D_REF(session_port, session_p, it->second);
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session_p->control.peer = peer;
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session_port = port;
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return session_p;
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}
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return nullptr;
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}
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void
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control_server_t::call(std::uint16_t type, session_t *session, const std::string_view &payload) {
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auto cb = _map_type_cb.find(type);
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if (cb == std::end(_map_type_cb)) {
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BOOST_LOG(debug)
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<< "type [Unknown] { "sv << util::hex(type).to_string_view() << " }"sv << std::endl
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<< "---data---"sv << std::endl
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<< util::hex_vec(payload) << std::endl
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<< "---end data---"sv;
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}
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else {
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cb->second(session, payload);
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}
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}
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void
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control_server_t::iterate(std::chrono::milliseconds timeout) {
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ENetEvent event;
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auto res = enet_host_service(_host.get(), &event, timeout.count());
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if (res > 0) {
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auto session = get_session(event.peer);
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if (!session) {
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BOOST_LOG(warning) << "Rejected connection from ["sv << platf::from_sockaddr((sockaddr *) &event.peer->address.address) << "]: it's not properly set up"sv;
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enet_peer_disconnect_now(event.peer, 0);
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return;
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}
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session->pingTimeout = std::chrono::steady_clock::now() + config::stream.ping_timeout;
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switch (event.type) {
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case ENET_EVENT_TYPE_RECEIVE: {
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net::packet_t packet { event.packet };
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auto type = *(std::uint16_t *) packet->data;
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std::string_view payload { (char *) packet->data + sizeof(type), packet->dataLength - sizeof(type) };
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call(type, session, payload);
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} break;
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case ENET_EVENT_TYPE_CONNECT:
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BOOST_LOG(info) << "CLIENT CONNECTED"sv;
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break;
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case ENET_EVENT_TYPE_DISCONNECT:
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BOOST_LOG(info) << "CLIENT DISCONNECTED"sv;
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// No more clients to send video data to ^_^
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if (session->state == session::state_e::RUNNING) {
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session::stop(*session);
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}
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break;
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case ENET_EVENT_TYPE_NONE:
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break;
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}
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}
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}
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namespace fec {
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using rs_t = util::safe_ptr<reed_solomon, reed_solomon_release>;
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struct fec_t {
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size_t data_shards;
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size_t nr_shards;
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size_t percentage;
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size_t blocksize;
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util::buffer_t<char> shards;
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char *
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data(size_t el) {
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return &shards[el * blocksize];
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}
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std::string_view
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operator[](size_t el) const {
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return { &shards[el * blocksize], blocksize };
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}
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size_t
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size() const {
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return nr_shards;
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}
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};
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static fec_t
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encode(const std::string_view &payload, size_t blocksize, size_t fecpercentage, size_t minparityshards) {
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auto payload_size = payload.size();
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auto pad = payload_size % blocksize != 0;
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auto data_shards = payload_size / blocksize + (pad ? 1 : 0);
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auto parity_shards = (data_shards * fecpercentage + 99) / 100;
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|
|
// increase the FEC percentage for this frame if the parity shard minimum is not met
|
|
if (parity_shards < minparityshards) {
|
|
parity_shards = minparityshards;
|
|
fecpercentage = (100 * parity_shards) / data_shards;
|
|
|
|
BOOST_LOG(verbose) << "Increasing FEC percentage to "sv << fecpercentage << " to meet parity shard minimum"sv << std::endl;
|
|
}
|
|
|
|
auto nr_shards = data_shards + parity_shards;
|
|
if (nr_shards > DATA_SHARDS_MAX) {
|
|
BOOST_LOG(warning)
|
|
<< "Number of fragments for reed solomon exceeds DATA_SHARDS_MAX"sv << std::endl
|
|
<< nr_shards << " > "sv << DATA_SHARDS_MAX
|
|
<< ", skipping error correction"sv;
|
|
|
|
nr_shards = data_shards;
|
|
fecpercentage = 0;
|
|
}
|
|
|
|
util::buffer_t<char> shards { nr_shards * blocksize };
|
|
util::buffer_t<uint8_t *> shards_p { nr_shards };
|
|
|
|
// copy payload + padding
|
|
auto next = std::copy(std::begin(payload), std::end(payload), std::begin(shards));
|
|
std::fill(next, std::end(shards), 0); // padding with zero
|
|
|
|
for (auto x = 0; x < nr_shards; ++x) {
|
|
shards_p[x] = (uint8_t *) &shards[x * blocksize];
|
|
}
|
|
|
|
if (data_shards + parity_shards <= DATA_SHARDS_MAX) {
|
|
// packets = parity_shards + data_shards
|
|
rs_t rs { reed_solomon_new(data_shards, parity_shards) };
|
|
|
|
reed_solomon_encode(rs.get(), shards_p.begin(), nr_shards, blocksize);
|
|
}
|
|
|
|
return {
|
|
data_shards,
|
|
nr_shards,
|
|
fecpercentage,
|
|
blocksize,
|
|
std::move(shards)
|
|
};
|
|
}
|
|
} // namespace fec
|
|
|
|
template <class F>
|
|
std::vector<uint8_t>
|
|
insert(uint64_t insert_size, uint64_t slice_size, const std::string_view &data, F &&f) {
|
|
auto pad = data.size() % slice_size != 0;
|
|
auto elements = data.size() / slice_size + (pad ? 1 : 0);
|
|
|
|
std::vector<uint8_t> result;
|
|
result.resize(elements * insert_size + data.size());
|
|
|
|
auto next = std::begin(data);
|
|
for (auto x = 0; x < elements - 1; ++x) {
|
|
void *p = &result[x * (insert_size + slice_size)];
|
|
|
|
f(p, x, elements);
|
|
|
|
std::copy(next, next + slice_size, (char *) p + insert_size);
|
|
next += slice_size;
|
|
}
|
|
|
|
auto x = elements - 1;
|
|
void *p = &result[x * (insert_size + slice_size)];
|
|
|
|
f(p, x, elements);
|
|
|
|
std::copy(next, std::end(data), (char *) p + insert_size);
|
|
|
|
return result;
|
|
}
|
|
|
|
std::vector<uint8_t>
|
|
replace(const std::string_view &original, const std::string_view &old, const std::string_view &_new) {
|
|
std::vector<uint8_t> replaced;
|
|
|
|
auto begin = std::begin(original);
|
|
auto end = std::end(original);
|
|
auto next = std::search(begin, end, std::begin(old), std::end(old));
|
|
|
|
std::copy(begin, next, std::back_inserter(replaced));
|
|
if (next != end) {
|
|
std::copy(std::begin(_new), std::end(_new), std::back_inserter(replaced));
|
|
std::copy(next + old.size(), end, std::back_inserter(replaced));
|
|
}
|
|
|
|
return replaced;
|
|
}
|
|
|
|
int
|
|
send_rumble(session_t *session, std::uint16_t id, std::uint16_t lowfreq, std::uint16_t highfreq) {
|
|
if (!session->control.peer) {
|
|
BOOST_LOG(warning) << "Couldn't send rumble data, still waiting for PING from Moonlight"sv;
|
|
// Still waiting for PING from Moonlight
|
|
return -1;
|
|
}
|
|
|
|
control_rumble_t plaintext;
|
|
plaintext.header.type = packetTypes[IDX_RUMBLE_DATA];
|
|
plaintext.header.payloadLength = sizeof(control_rumble_t) - sizeof(control_header_v2);
|
|
|
|
plaintext.useless = 0xC0FFEE;
|
|
plaintext.id = util::endian::little(id);
|
|
plaintext.lowfreq = util::endian::little(lowfreq);
|
|
plaintext.highfreq = util::endian::little(highfreq);
|
|
|
|
BOOST_LOG(verbose) << id << " :: "sv << util::hex(lowfreq).to_string_view() << " :: "sv << util::hex(highfreq).to_string_view();
|
|
std::array<std::uint8_t,
|
|
sizeof(control_encrypted_t) + crypto::cipher::round_to_pkcs7_padded(sizeof(plaintext)) + crypto::cipher::tag_size>
|
|
encrypted_payload;
|
|
|
|
auto payload = encode_control(session, util::view(plaintext), encrypted_payload);
|
|
if (session->broadcast_ref->control_server.send(payload, session->control.peer)) {
|
|
TUPLE_2D(port, addr, platf::from_sockaddr_ex((sockaddr *) &session->control.peer->address.address));
|
|
BOOST_LOG(warning) << "Couldn't send termination code to ["sv << addr << ':' << port << ']';
|
|
|
|
return -1;
|
|
}
|
|
|
|
BOOST_LOG(debug) << "Send gamepadnr ["sv << id << "] with lowfreq ["sv << lowfreq << "] and highfreq ["sv << highfreq << ']';
|
|
|
|
return 0;
|
|
}
|
|
|
|
int
|
|
send_hdr_mode(session_t *session, video::hdr_info_t hdr_info) {
|
|
if (!session->control.peer) {
|
|
BOOST_LOG(warning) << "Couldn't send HDR mode, still waiting for PING from Moonlight"sv;
|
|
// Still waiting for PING from Moonlight
|
|
return -1;
|
|
}
|
|
|
|
control_hdr_mode_t plaintext {};
|
|
plaintext.header.type = packetTypes[IDX_HDR_MODE];
|
|
plaintext.header.payloadLength = sizeof(control_hdr_mode_t) - sizeof(control_header_v2);
|
|
|
|
plaintext.enabled = hdr_info->enabled;
|
|
plaintext.metadata = hdr_info->metadata;
|
|
|
|
std::array<std::uint8_t,
|
|
sizeof(control_encrypted_t) + crypto::cipher::round_to_pkcs7_padded(sizeof(plaintext)) + crypto::cipher::tag_size>
|
|
encrypted_payload;
|
|
|
|
auto payload = encode_control(session, util::view(plaintext), encrypted_payload);
|
|
if (session->broadcast_ref->control_server.send(payload, session->control.peer)) {
|
|
TUPLE_2D(port, addr, platf::from_sockaddr_ex((sockaddr *) &session->control.peer->address.address));
|
|
BOOST_LOG(warning) << "Couldn't send HDR mode to ["sv << addr << ':' << port << ']';
|
|
|
|
return -1;
|
|
}
|
|
|
|
BOOST_LOG(debug) << "Sent HDR mode: " << hdr_info->enabled;
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
controlBroadcastThread(control_server_t *server) {
|
|
server->map(packetTypes[IDX_PERIODIC_PING], [](session_t *session, const std::string_view &payload) {
|
|
BOOST_LOG(verbose) << "type [IDX_START_A]"sv;
|
|
});
|
|
|
|
server->map(packetTypes[IDX_START_A], [&](session_t *session, const std::string_view &payload) {
|
|
BOOST_LOG(debug) << "type [IDX_START_A]"sv;
|
|
});
|
|
|
|
server->map(packetTypes[IDX_START_B], [&](session_t *session, const std::string_view &payload) {
|
|
BOOST_LOG(debug) << "type [IDX_START_B]"sv;
|
|
});
|
|
|
|
server->map(packetTypes[IDX_LOSS_STATS], [&](session_t *session, const std::string_view &payload) {
|
|
int32_t *stats = (int32_t *) payload.data();
|
|
auto count = stats[0];
|
|
std::chrono::milliseconds t { stats[1] };
|
|
|
|
auto lastGoodFrame = stats[3];
|
|
|
|
BOOST_LOG(verbose)
|
|
<< "type [IDX_LOSS_STATS]"sv << std::endl
|
|
<< "---begin stats---" << std::endl
|
|
<< "loss count since last report [" << count << ']' << std::endl
|
|
<< "time in milli since last report [" << t.count() << ']' << std::endl
|
|
<< "last good frame [" << lastGoodFrame << ']' << std::endl
|
|
<< "---end stats---";
|
|
});
|
|
|
|
server->map(packetTypes[IDX_REQUEST_IDR_FRAME], [&](session_t *session, const std::string_view &payload) {
|
|
BOOST_LOG(debug) << "type [IDX_REQUEST_IDR_FRAME]"sv;
|
|
|
|
session->video.idr_events->raise(true);
|
|
});
|
|
|
|
server->map(packetTypes[IDX_INVALIDATE_REF_FRAMES], [&](session_t *session, const std::string_view &payload) {
|
|
auto frames = (std::int64_t *) payload.data();
|
|
auto firstFrame = frames[0];
|
|
auto lastFrame = frames[1];
|
|
|
|
BOOST_LOG(debug)
|
|
<< "type [IDX_INVALIDATE_REF_FRAMES]"sv << std::endl
|
|
<< "firstFrame [" << firstFrame << ']' << std::endl
|
|
<< "lastFrame [" << lastFrame << ']';
|
|
|
|
session->video.idr_events->raise(true);
|
|
});
|
|
|
|
server->map(packetTypes[IDX_INPUT_DATA], [&](session_t *session, const std::string_view &payload) {
|
|
BOOST_LOG(debug) << "type [IDX_INPUT_DATA]"sv;
|
|
|
|
auto tagged_cipher_length = util::endian::big(*(int32_t *) payload.data());
|
|
std::string_view tagged_cipher { payload.data() + sizeof(tagged_cipher_length), (size_t) tagged_cipher_length };
|
|
|
|
std::vector<uint8_t> plaintext;
|
|
|
|
auto &cipher = session->control.cipher;
|
|
auto &iv = session->control.iv;
|
|
if (cipher.decrypt(tagged_cipher, plaintext, &iv)) {
|
|
// something went wrong :(
|
|
|
|
BOOST_LOG(error) << "Failed to verify tag"sv;
|
|
|
|
session::stop(*session);
|
|
return;
|
|
}
|
|
|
|
if (tagged_cipher_length >= 16 + sizeof(crypto::aes_t)) {
|
|
std::copy(payload.end() - 16, payload.end(), std::begin(iv));
|
|
}
|
|
|
|
input::print(plaintext.data());
|
|
input::passthrough(session->input, std::move(plaintext));
|
|
});
|
|
|
|
server->map(packetTypes[IDX_ENCRYPTED], [server](session_t *session, const std::string_view &payload) {
|
|
BOOST_LOG(verbose) << "type [IDX_ENCRYPTED]"sv;
|
|
|
|
auto header = (control_encrypted_p) (payload.data() - 2);
|
|
|
|
auto length = util::endian::little(header->length);
|
|
auto seq = util::endian::little(header->seq);
|
|
|
|
if (length < (16 + 4 + 4)) {
|
|
BOOST_LOG(warning) << "Control: Runt packet"sv;
|
|
return;
|
|
}
|
|
|
|
auto tagged_cipher_length = length - 4;
|
|
std::string_view tagged_cipher { (char *) header->payload(), (size_t) tagged_cipher_length };
|
|
|
|
auto &cipher = session->control.cipher;
|
|
crypto::aes_t iv {};
|
|
iv[0] = (std::uint8_t) seq;
|
|
|
|
// update control sequence
|
|
++session->control.seq;
|
|
|
|
std::vector<uint8_t> plaintext;
|
|
if (cipher.decrypt(tagged_cipher, plaintext, &iv)) {
|
|
// something went wrong :(
|
|
|
|
BOOST_LOG(error) << "Failed to verify tag"sv;
|
|
|
|
session::stop(*session);
|
|
return;
|
|
}
|
|
|
|
// Ensure compatibility with old packet type
|
|
std::string_view next_payload { (char *) plaintext.data(), plaintext.size() };
|
|
auto type = *(std::uint16_t *) next_payload.data();
|
|
|
|
if (type == packetTypes[IDX_ENCRYPTED]) {
|
|
BOOST_LOG(error) << "Bad packet type [IDX_ENCRYPTED] found"sv;
|
|
|
|
session::stop(*session);
|
|
return;
|
|
}
|
|
|
|
// IDX_INPUT_DATA will attempt to decrypt unencrypted data, therefore we need to skip it.
|
|
if (type != packetTypes[IDX_INPUT_DATA]) {
|
|
server->call(type, session, next_payload);
|
|
|
|
return;
|
|
}
|
|
|
|
// Ensure compatibility with IDX_INPUT_DATA
|
|
constexpr auto skip = sizeof(std::uint16_t) * 2;
|
|
plaintext.erase(std::begin(plaintext), std::begin(plaintext) + skip);
|
|
|
|
input::print(plaintext.data());
|
|
input::passthrough(session->input, std::move(plaintext));
|
|
});
|
|
|
|
// This thread handles latency-sensitive control messages
|
|
platf::adjust_thread_priority(platf::thread_priority_e::critical);
|
|
|
|
auto shutdown_event = mail::man->event<bool>(mail::broadcast_shutdown);
|
|
while (!shutdown_event->peek()) {
|
|
bool has_session_awaiting_peer = false;
|
|
|
|
{
|
|
auto lg = server->_map_addr_session.lock();
|
|
|
|
auto now = std::chrono::steady_clock::now();
|
|
|
|
KITTY_WHILE_LOOP(auto pos = std::begin(*server->_map_addr_session), pos != std::end(*server->_map_addr_session), {
|
|
TUPLE_2D_REF(addr, port_session, *pos);
|
|
auto session = port_session.second;
|
|
|
|
if (now > session->pingTimeout) {
|
|
BOOST_LOG(info) << addr << ": Ping Timeout"sv;
|
|
session::stop(*session);
|
|
}
|
|
|
|
if (session->state.load(std::memory_order_acquire) == session::state_e::STOPPING) {
|
|
pos = server->_map_addr_session->erase(pos);
|
|
|
|
if (session->control.peer) {
|
|
enet_peer_disconnect_now(session->control.peer, 0);
|
|
}
|
|
|
|
session->controlEnd.raise(true);
|
|
continue;
|
|
}
|
|
|
|
// Remember if we have a session that's waiting for a peer to connect to the
|
|
// control stream. This ensures the clients are properly notified even when
|
|
// the app terminates before they finish connecting.
|
|
if (!session->control.peer) {
|
|
has_session_awaiting_peer = true;
|
|
}
|
|
|
|
auto &rumble_queue = session->control.rumble_queue;
|
|
while (rumble_queue->peek()) {
|
|
auto rumble = rumble_queue->pop();
|
|
|
|
send_rumble(session, rumble->id, rumble->lowfreq, rumble->highfreq);
|
|
}
|
|
|
|
// Unlike rumble which we send as best-effort, HDR state messages are critical
|
|
// for proper functioning of some clients. We must wait to pop entries from
|
|
// the queue until we're sure we have a peer to send them to.
|
|
auto &hdr_queue = session->control.hdr_queue;
|
|
while (session->control.peer && hdr_queue->peek()) {
|
|
auto hdr_info = hdr_queue->pop();
|
|
|
|
send_hdr_mode(session, std::move(hdr_info));
|
|
}
|
|
|
|
++pos;
|
|
})
|
|
}
|
|
|
|
// Don't break until any pending sessions either expire or connect
|
|
if (proc::proc.running() == 0 && !has_session_awaiting_peer) {
|
|
BOOST_LOG(info) << "Process terminated"sv;
|
|
break;
|
|
}
|
|
|
|
server->iterate(150ms);
|
|
}
|
|
|
|
// Let all remaining connections know the server is shutting down
|
|
// reason: graceful termination
|
|
std::uint32_t reason = 0x80030023;
|
|
|
|
control_terminate_t plaintext;
|
|
plaintext.header.type = packetTypes[IDX_TERMINATION];
|
|
plaintext.header.payloadLength = sizeof(plaintext.ec);
|
|
plaintext.ec = util::endian::big<uint32_t>(reason);
|
|
|
|
std::array<std::uint8_t,
|
|
sizeof(control_encrypted_t) + crypto::cipher::round_to_pkcs7_padded(sizeof(plaintext)) + crypto::cipher::tag_size>
|
|
encrypted_payload;
|
|
|
|
auto lg = server->_map_addr_session.lock();
|
|
for (auto pos = std::begin(*server->_map_addr_session); pos != std::end(*server->_map_addr_session); ++pos) {
|
|
auto session = pos->second.second;
|
|
|
|
// We may not have gotten far enough to have an ENet connection yet
|
|
if (session->control.peer) {
|
|
auto payload = encode_control(session, util::view(plaintext), encrypted_payload);
|
|
|
|
if (server->send(payload, session->control.peer)) {
|
|
TUPLE_2D(port, addr, platf::from_sockaddr_ex((sockaddr *) &session->control.peer->address.address));
|
|
BOOST_LOG(warning) << "Couldn't send termination code to ["sv << addr << ':' << port << ']';
|
|
}
|
|
}
|
|
|
|
session->shutdown_event->raise(true);
|
|
session->controlEnd.raise(true);
|
|
}
|
|
|
|
server->flush();
|
|
}
|
|
|
|
void
|
|
recvThread(broadcast_ctx_t &ctx) {
|
|
std::map<asio::ip::address, message_queue_t> peer_to_video_session;
|
|
std::map<asio::ip::address, message_queue_t> peer_to_audio_session;
|
|
|
|
auto &video_sock = ctx.video_sock;
|
|
auto &audio_sock = ctx.audio_sock;
|
|
|
|
auto &message_queue_queue = ctx.message_queue_queue;
|
|
auto broadcast_shutdown_event = mail::man->event<bool>(mail::broadcast_shutdown);
|
|
|
|
auto &io = ctx.io;
|
|
|
|
udp::endpoint peer;
|
|
|
|
std::array<char, 2048> buf[2];
|
|
std::function<void(const boost::system::error_code, size_t)> recv_func[2];
|
|
|
|
auto populate_peer_to_session = [&]() {
|
|
while (message_queue_queue->peek()) {
|
|
auto message_queue_opt = message_queue_queue->pop();
|
|
TUPLE_3D_REF(socket_type, addr, message_queue, *message_queue_opt);
|
|
|
|
switch (socket_type) {
|
|
case socket_e::video:
|
|
if (message_queue) {
|
|
peer_to_video_session.emplace(addr, message_queue);
|
|
}
|
|
else {
|
|
peer_to_video_session.erase(addr);
|
|
}
|
|
break;
|
|
case socket_e::audio:
|
|
if (message_queue) {
|
|
peer_to_audio_session.emplace(addr, message_queue);
|
|
}
|
|
else {
|
|
peer_to_audio_session.erase(addr);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
};
|
|
|
|
auto recv_func_init = [&](udp::socket &sock, int buf_elem, std::map<asio::ip::address, message_queue_t> &peer_to_session) {
|
|
recv_func[buf_elem] = [&, buf_elem](const boost::system::error_code &ec, size_t bytes) {
|
|
auto fg = util::fail_guard([&]() {
|
|
sock.async_receive_from(asio::buffer(buf[buf_elem]), peer, 0, recv_func[buf_elem]);
|
|
});
|
|
|
|
auto type_str = buf_elem ? "AUDIO"sv : "VIDEO"sv;
|
|
BOOST_LOG(verbose) << "Recv: "sv << peer.address().to_string() << ':' << peer.port() << " :: " << type_str;
|
|
|
|
populate_peer_to_session();
|
|
|
|
// No data, yet no error
|
|
if (ec == boost::system::errc::connection_refused || ec == boost::system::errc::connection_reset) {
|
|
return;
|
|
}
|
|
|
|
if (ec || !bytes) {
|
|
BOOST_LOG(error) << "Couldn't receive data from udp socket: "sv << ec.message();
|
|
return;
|
|
}
|
|
|
|
auto it = peer_to_session.find(peer.address());
|
|
if (it != std::end(peer_to_session)) {
|
|
BOOST_LOG(debug) << "RAISE: "sv << peer.address().to_string() << ':' << peer.port() << " :: " << type_str;
|
|
it->second->raise(peer.port(), std::string { buf[buf_elem].data(), bytes });
|
|
}
|
|
};
|
|
};
|
|
|
|
recv_func_init(video_sock, 0, peer_to_video_session);
|
|
recv_func_init(audio_sock, 1, peer_to_audio_session);
|
|
|
|
video_sock.async_receive_from(asio::buffer(buf[0]), peer, 0, recv_func[0]);
|
|
audio_sock.async_receive_from(asio::buffer(buf[1]), peer, 0, recv_func[1]);
|
|
|
|
while (!broadcast_shutdown_event->peek()) {
|
|
io.run();
|
|
}
|
|
}
|
|
|
|
void
|
|
videoBroadcastThread(udp::socket &sock) {
|
|
auto shutdown_event = mail::man->event<bool>(mail::broadcast_shutdown);
|
|
auto packets = mail::man->queue<video::packet_t>(mail::video_packets);
|
|
auto timebase = boost::posix_time::microsec_clock::universal_time();
|
|
|
|
// Video traffic is sent on this thread
|
|
platf::adjust_thread_priority(platf::thread_priority_e::high);
|
|
|
|
stat_trackers::min_max_avg_tracker<uint16_t> frame_processing_latency_tracker;
|
|
|
|
while (auto packet = packets->pop()) {
|
|
if (shutdown_event->peek()) {
|
|
break;
|
|
}
|
|
|
|
auto session = (session_t *) packet->channel_data;
|
|
auto lowseq = session->video.lowseq;
|
|
|
|
auto av_packet = packet->av_packet;
|
|
std::string_view payload { (char *) av_packet->data, (size_t) av_packet->size };
|
|
std::vector<uint8_t> payload_new;
|
|
|
|
video_short_frame_header_t frame_header = {};
|
|
frame_header.headerType = 0x01; // Short header type
|
|
frame_header.frameType = (av_packet->flags & AV_PKT_FLAG_KEY) ? 2 : 1;
|
|
|
|
if (packet->frame_timestamp) {
|
|
auto duration_to_latency = [](const std::chrono::steady_clock::duration &duration) {
|
|
const auto duration_us = std::chrono::duration_cast<std::chrono::microseconds>(duration).count();
|
|
return (uint16_t) std::clamp<decltype(duration_us)>((duration_us + 50) / 100, 0, std::numeric_limits<uint16_t>::max());
|
|
};
|
|
|
|
uint16_t latency = duration_to_latency(std::chrono::steady_clock::now() - *packet->frame_timestamp);
|
|
|
|
if (config::sunshine.min_log_level <= 1) {
|
|
// Print frame processing latency stats to debug log every 20 seconds
|
|
auto print_info = [&](uint16_t min_latency, uint16_t max_latency, double avg_latency) {
|
|
auto f = stat_trackers::one_digit_after_decimal();
|
|
BOOST_LOG(debug) << "Frame processing latency (min/max/avg): " << f % (min_latency / 10.) << "ms/" << f % (max_latency / 10.) << "ms/" << f % (avg_latency / 10.) << "ms";
|
|
};
|
|
frame_processing_latency_tracker.collect_and_callback_on_interval(latency, print_info, 20s);
|
|
}
|
|
|
|
frame_header.frame_processing_latency = latency;
|
|
}
|
|
else {
|
|
frame_header.frame_processing_latency = 0;
|
|
}
|
|
|
|
std::copy_n((uint8_t *) &frame_header, sizeof(frame_header), std::back_inserter(payload_new));
|
|
std::copy(std::begin(payload), std::end(payload), std::back_inserter(payload_new));
|
|
|
|
payload = { (char *) payload_new.data(), payload_new.size() };
|
|
|
|
if (av_packet->flags & AV_PKT_FLAG_KEY) {
|
|
for (auto &replacement : *packet->replacements) {
|
|
auto frame_old = replacement.old;
|
|
auto frame_new = replacement._new;
|
|
|
|
payload_new = replace(payload, frame_old, frame_new);
|
|
payload = { (char *) payload_new.data(), payload_new.size() };
|
|
}
|
|
}
|
|
|
|
// insert packet headers
|
|
auto blocksize = session->config.packetsize + MAX_RTP_HEADER_SIZE;
|
|
auto payload_blocksize = blocksize - sizeof(video_packet_raw_t);
|
|
|
|
auto fecPercentage = config::stream.fec_percentage;
|
|
|
|
payload_new = insert(sizeof(video_packet_raw_t), payload_blocksize,
|
|
payload, [&](void *p, int fecIndex, int end) {
|
|
video_packet_raw_t *video_packet = (video_packet_raw_t *) p;
|
|
|
|
video_packet->packet.flags = FLAG_CONTAINS_PIC_DATA;
|
|
});
|
|
|
|
payload = std::string_view { (char *) payload_new.data(), payload_new.size() };
|
|
|
|
// With a fecpercentage of 255, if payload_new is broken up into more than a 100 data_shards
|
|
// it will generate greater than DATA_SHARDS_MAX shards.
|
|
// Therefore, we start breaking the data up into three separate fec blocks.
|
|
auto multi_fec_threshold = 90 * blocksize;
|
|
|
|
// We can go up to 4 fec blocks, but 3 is plenty
|
|
constexpr auto MAX_FEC_BLOCKS = 3;
|
|
|
|
std::array<std::string_view, MAX_FEC_BLOCKS> fec_blocks;
|
|
decltype(fec_blocks)::iterator
|
|
fec_blocks_begin = std::begin(fec_blocks),
|
|
fec_blocks_end = std::begin(fec_blocks) + 1;
|
|
|
|
auto lastBlockIndex = 0;
|
|
if (payload.size() > multi_fec_threshold) {
|
|
BOOST_LOG(verbose) << "Generating multiple FEC blocks"sv;
|
|
|
|
// Align individual fec blocks to blocksize
|
|
auto unaligned_size = payload.size() / MAX_FEC_BLOCKS;
|
|
auto aligned_size = ((unaligned_size + (blocksize - 1)) / blocksize) * blocksize;
|
|
|
|
// Break the data up into 3 blocks, each containing multiple complete video packets.
|
|
fec_blocks[0] = payload.substr(0, aligned_size);
|
|
fec_blocks[1] = payload.substr(aligned_size, aligned_size);
|
|
fec_blocks[2] = payload.substr(aligned_size * 2);
|
|
|
|
lastBlockIndex = 2 << 6;
|
|
fec_blocks_end = std::end(fec_blocks);
|
|
}
|
|
else {
|
|
BOOST_LOG(verbose) << "Generating single FEC block"sv;
|
|
fec_blocks[0] = payload;
|
|
}
|
|
|
|
try {
|
|
auto blockIndex = 0;
|
|
std::for_each(fec_blocks_begin, fec_blocks_end, [&](std::string_view ¤t_payload) {
|
|
auto packets = (current_payload.size() + (blocksize - 1)) / blocksize;
|
|
|
|
for (int x = 0; x < packets; ++x) {
|
|
auto *inspect = (video_packet_raw_t *) ¤t_payload[x * blocksize];
|
|
auto av_packet = packet->av_packet;
|
|
|
|
inspect->packet.frameIndex = av_packet->pts;
|
|
inspect->packet.streamPacketIndex = ((uint32_t) lowseq + x) << 8;
|
|
|
|
// Match multiFecFlags with Moonlight
|
|
inspect->packet.multiFecFlags = 0x10;
|
|
inspect->packet.multiFecBlocks = (blockIndex << 4) | lastBlockIndex;
|
|
|
|
if (x == 0) {
|
|
inspect->packet.flags |= FLAG_SOF;
|
|
}
|
|
|
|
if (x == packets - 1) {
|
|
inspect->packet.flags |= FLAG_EOF;
|
|
}
|
|
}
|
|
|
|
auto shards = fec::encode(current_payload, blocksize, fecPercentage, session->config.minRequiredFecPackets);
|
|
|
|
// set FEC info now that we know for sure what our percentage will be for this frame
|
|
for (auto x = 0; x < shards.size(); ++x) {
|
|
auto *inspect = (video_packet_raw_t *) shards.data(x);
|
|
|
|
// RTP video timestamps use a 90 KHz clock
|
|
auto now = boost::posix_time::microsec_clock::universal_time();
|
|
auto timestamp = (now - timebase).total_microseconds() / (1000 / 90);
|
|
|
|
inspect->packet.fecInfo =
|
|
(x << 12 |
|
|
shards.data_shards << 22 |
|
|
shards.percentage << 4);
|
|
|
|
inspect->rtp.header = 0x80 | FLAG_EXTENSION;
|
|
inspect->rtp.sequenceNumber = util::endian::big<uint16_t>(lowseq + x);
|
|
inspect->rtp.timestamp = util::endian::big<uint32_t>(timestamp);
|
|
|
|
inspect->packet.multiFecBlocks = (blockIndex << 4) | lastBlockIndex;
|
|
inspect->packet.frameIndex = av_packet->pts;
|
|
}
|
|
|
|
auto peer_address = session->video.peer.address();
|
|
auto batch_info = platf::batched_send_info_t {
|
|
shards.shards.begin(),
|
|
shards.blocksize,
|
|
shards.nr_shards,
|
|
(uintptr_t) sock.native_handle(),
|
|
peer_address,
|
|
session->video.peer.port(),
|
|
};
|
|
|
|
// Use a batched send if it's supported on this platform
|
|
if (!platf::send_batch(batch_info)) {
|
|
// Batched send is not available, so send each packet individually
|
|
BOOST_LOG(verbose) << "Falling back to unbatched send"sv;
|
|
for (auto x = 0; x < shards.size(); ++x) {
|
|
sock.send_to(asio::buffer(shards[x]), session->video.peer);
|
|
}
|
|
}
|
|
|
|
if (av_packet->flags & AV_PKT_FLAG_KEY) {
|
|
BOOST_LOG(verbose) << "Key Frame ["sv << av_packet->pts << "] :: send ["sv << shards.size() << "] shards..."sv;
|
|
}
|
|
else {
|
|
BOOST_LOG(verbose) << "Frame ["sv << av_packet->pts << "] :: send ["sv << shards.size() << "] shards..."sv << std::endl;
|
|
}
|
|
|
|
++blockIndex;
|
|
lowseq += shards.size();
|
|
});
|
|
|
|
session->video.lowseq = lowseq;
|
|
}
|
|
catch (const std::exception &e) {
|
|
BOOST_LOG(error) << "Broadcast video failed "sv << e.what();
|
|
std::this_thread::sleep_for(100ms);
|
|
}
|
|
}
|
|
|
|
shutdown_event->raise(true);
|
|
}
|
|
|
|
void
|
|
audioBroadcastThread(udp::socket &sock) {
|
|
auto shutdown_event = mail::man->event<bool>(mail::broadcast_shutdown);
|
|
auto packets = mail::man->queue<audio::packet_t>(mail::audio_packets);
|
|
|
|
constexpr auto max_block_size = crypto::cipher::round_to_pkcs7_padded(2048);
|
|
|
|
audio_packet_t audio_packet { (audio_packet_raw_t *) malloc(sizeof(audio_packet_raw_t) + max_block_size) };
|
|
fec::rs_t rs { reed_solomon_new(RTPA_DATA_SHARDS, RTPA_FEC_SHARDS) };
|
|
|
|
// For unknown reasons, the RS parity matrix computed by our RS implementation
|
|
// doesn't match the one Nvidia uses for audio data. I'm not exactly sure why,
|
|
// but we can simply replace it with the matrix generated by OpenFEC which
|
|
// works correctly. This is possible because the data and FEC shard count is
|
|
// constant and known in advance.
|
|
const unsigned char parity[] = { 0x77, 0x40, 0x38, 0x0e, 0xc7, 0xa7, 0x0d, 0x6c };
|
|
memcpy(rs.get()->p, parity, sizeof(parity));
|
|
|
|
audio_packet->rtp.header = 0x80;
|
|
audio_packet->rtp.packetType = 97;
|
|
audio_packet->rtp.ssrc = 0;
|
|
|
|
// Audio traffic is sent on this thread
|
|
platf::adjust_thread_priority(platf::thread_priority_e::high);
|
|
|
|
while (auto packet = packets->pop()) {
|
|
if (shutdown_event->peek()) {
|
|
break;
|
|
}
|
|
|
|
TUPLE_2D_REF(channel_data, packet_data, *packet);
|
|
auto session = (session_t *) channel_data;
|
|
|
|
auto sequenceNumber = session->audio.sequenceNumber;
|
|
auto timestamp = session->audio.timestamp;
|
|
|
|
// This will be mapped to big-endianness later
|
|
// For now, encode_audio needs it to be the proper sequenceNumber
|
|
audio_packet->rtp.sequenceNumber = sequenceNumber;
|
|
|
|
auto bytes = encode_audio(session->config.featureFlags, packet_data, audio_packet, session->audio.avRiKeyId, session->audio.cipher);
|
|
if (bytes < 0) {
|
|
BOOST_LOG(error) << "Couldn't encode audio packet"sv;
|
|
break;
|
|
}
|
|
|
|
audio_packet->rtp.sequenceNumber = util::endian::big(sequenceNumber);
|
|
audio_packet->rtp.timestamp = util::endian::big(timestamp);
|
|
|
|
session->audio.sequenceNumber++;
|
|
session->audio.timestamp += session->config.audio.packetDuration;
|
|
|
|
auto &shards_p = session->audio.shards_p;
|
|
|
|
std::copy_n(audio_packet->payload(), bytes, shards_p[sequenceNumber % RTPA_DATA_SHARDS]);
|
|
try {
|
|
sock.send_to(asio::buffer((char *) audio_packet.get(), sizeof(audio_packet_raw_t) + bytes), session->audio.peer);
|
|
|
|
BOOST_LOG(verbose) << "Audio ["sv << sequenceNumber << "] :: send..."sv;
|
|
|
|
auto &fec_packet = session->audio.fec_packet;
|
|
// initialize the FEC header at the beginning of the FEC block
|
|
if (sequenceNumber % RTPA_DATA_SHARDS == 0) {
|
|
fec_packet->fecHeader.baseSequenceNumber = util::endian::big(sequenceNumber);
|
|
fec_packet->fecHeader.baseTimestamp = util::endian::big(timestamp);
|
|
}
|
|
|
|
// generate parity shards at the end of the FEC block
|
|
if ((sequenceNumber + 1) % RTPA_DATA_SHARDS == 0) {
|
|
reed_solomon_encode(rs.get(), shards_p.begin(), RTPA_TOTAL_SHARDS, bytes);
|
|
|
|
for (auto x = 0; x < RTPA_FEC_SHARDS; ++x) {
|
|
fec_packet->rtp.sequenceNumber = util::endian::big<std::uint16_t>(sequenceNumber + x + 1);
|
|
fec_packet->fecHeader.fecShardIndex = x;
|
|
memcpy(fec_packet->payload(), shards_p[RTPA_DATA_SHARDS + x], bytes);
|
|
sock.send_to(asio::buffer((char *) fec_packet.get(), sizeof(audio_fec_packet_raw_t) + bytes), session->audio.peer);
|
|
BOOST_LOG(verbose) << "Audio FEC ["sv << (sequenceNumber & ~(RTPA_DATA_SHARDS - 1)) << ' ' << x << "] :: send..."sv;
|
|
}
|
|
}
|
|
}
|
|
catch (const std::exception &e) {
|
|
BOOST_LOG(error) << "Broadcast audio failed "sv << e.what();
|
|
std::this_thread::sleep_for(100ms);
|
|
}
|
|
}
|
|
|
|
shutdown_event->raise(true);
|
|
}
|
|
|
|
int
|
|
start_broadcast(broadcast_ctx_t &ctx) {
|
|
auto control_port = map_port(CONTROL_PORT);
|
|
auto video_port = map_port(VIDEO_STREAM_PORT);
|
|
auto audio_port = map_port(AUDIO_STREAM_PORT);
|
|
|
|
if (ctx.control_server.bind(control_port)) {
|
|
BOOST_LOG(error) << "Couldn't bind Control server to port ["sv << control_port << "], likely another process already bound to the port"sv;
|
|
|
|
return -1;
|
|
}
|
|
|
|
boost::system::error_code ec;
|
|
ctx.video_sock.open(udp::v4(), ec);
|
|
if (ec) {
|
|
BOOST_LOG(fatal) << "Couldn't open socket for Video server: "sv << ec.message();
|
|
|
|
return -1;
|
|
}
|
|
|
|
ctx.video_sock.bind(udp::endpoint(udp::v4(), video_port), ec);
|
|
if (ec) {
|
|
BOOST_LOG(fatal) << "Couldn't bind Video server to port ["sv << video_port << "]: "sv << ec.message();
|
|
|
|
return -1;
|
|
}
|
|
|
|
ctx.audio_sock.open(udp::v4(), ec);
|
|
if (ec) {
|
|
BOOST_LOG(fatal) << "Couldn't open socket for Audio server: "sv << ec.message();
|
|
|
|
return -1;
|
|
}
|
|
|
|
ctx.audio_sock.bind(udp::endpoint(udp::v4(), audio_port), ec);
|
|
if (ec) {
|
|
BOOST_LOG(fatal) << "Couldn't bind Audio server to port ["sv << audio_port << "]: "sv << ec.message();
|
|
|
|
return -1;
|
|
}
|
|
|
|
ctx.message_queue_queue = std::make_shared<message_queue_queue_t::element_type>(30);
|
|
|
|
ctx.video_thread = std::thread { videoBroadcastThread, std::ref(ctx.video_sock) };
|
|
ctx.audio_thread = std::thread { audioBroadcastThread, std::ref(ctx.audio_sock) };
|
|
ctx.control_thread = std::thread { controlBroadcastThread, &ctx.control_server };
|
|
|
|
ctx.recv_thread = std::thread { recvThread, std::ref(ctx) };
|
|
|
|
return 0;
|
|
}
|
|
|
|
void
|
|
end_broadcast(broadcast_ctx_t &ctx) {
|
|
auto broadcast_shutdown_event = mail::man->event<bool>(mail::broadcast_shutdown);
|
|
|
|
broadcast_shutdown_event->raise(true);
|
|
|
|
auto video_packets = mail::man->queue<video::packet_t>(mail::video_packets);
|
|
auto audio_packets = mail::man->queue<audio::packet_t>(mail::audio_packets);
|
|
|
|
// Minimize delay stopping video/audio threads
|
|
video_packets->stop();
|
|
audio_packets->stop();
|
|
|
|
ctx.message_queue_queue->stop();
|
|
ctx.io.stop();
|
|
|
|
ctx.video_sock.close();
|
|
ctx.audio_sock.close();
|
|
|
|
video_packets.reset();
|
|
audio_packets.reset();
|
|
|
|
BOOST_LOG(debug) << "Waiting for main listening thread to end..."sv;
|
|
ctx.recv_thread.join();
|
|
BOOST_LOG(debug) << "Waiting for main video thread to end..."sv;
|
|
ctx.video_thread.join();
|
|
BOOST_LOG(debug) << "Waiting for main audio thread to end..."sv;
|
|
ctx.audio_thread.join();
|
|
BOOST_LOG(debug) << "Waiting for main control thread to end..."sv;
|
|
ctx.control_thread.join();
|
|
BOOST_LOG(debug) << "All broadcasting threads ended"sv;
|
|
|
|
broadcast_shutdown_event->reset();
|
|
}
|
|
|
|
int
|
|
recv_ping(decltype(broadcast)::ptr_t ref, socket_e type, udp::endpoint &peer, std::chrono::milliseconds timeout) {
|
|
auto constexpr ping = "PING"sv;
|
|
|
|
auto messages = std::make_shared<message_queue_t::element_type>(30);
|
|
ref->message_queue_queue->raise(type, peer.address(), messages);
|
|
|
|
auto fg = util::fail_guard([&]() {
|
|
messages->stop();
|
|
|
|
// remove message queue from session
|
|
ref->message_queue_queue->raise(type, peer.address(), nullptr);
|
|
});
|
|
|
|
auto start_time = std::chrono::steady_clock::now();
|
|
auto current_time = start_time;
|
|
|
|
while (current_time - start_time < config::stream.ping_timeout) {
|
|
auto delta_time = current_time - start_time;
|
|
|
|
auto msg_opt = messages->pop(config::stream.ping_timeout - delta_time);
|
|
if (!msg_opt) {
|
|
break;
|
|
}
|
|
|
|
TUPLE_2D_REF(port, msg, *msg_opt);
|
|
if (msg == ping) {
|
|
BOOST_LOG(debug) << "Received ping from "sv << peer.address() << ':' << port << " ["sv << util::hex_vec(msg) << ']';
|
|
|
|
// Update connection details.
|
|
{
|
|
auto addr_str = peer.address().to_string();
|
|
|
|
auto &connections = ref->audio_video_connections;
|
|
|
|
auto lg = connections.lock();
|
|
|
|
std::remove_reference_t<decltype(*connections)>::iterator pos = std::end(*connections);
|
|
|
|
for (auto it = std::begin(*connections); it != std::end(*connections); ++it) {
|
|
TUPLE_2D_REF(addr, port_ref, *it);
|
|
|
|
if (!port_ref && addr_str == addr) {
|
|
pos = it;
|
|
}
|
|
else if (port_ref == port) {
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (pos == std::end(*connections)) {
|
|
continue;
|
|
}
|
|
|
|
pos->second = port;
|
|
peer.port(port);
|
|
}
|
|
|
|
return port;
|
|
}
|
|
|
|
BOOST_LOG(debug) << "Received non-ping from "sv << peer.address() << ':' << port << " ["sv << util::hex_vec(msg) << ']';
|
|
|
|
current_time = std::chrono::steady_clock::now();
|
|
}
|
|
|
|
BOOST_LOG(error) << "Initial Ping Timeout"sv;
|
|
return -1;
|
|
}
|
|
|
|
void
|
|
videoThread(session_t *session) {
|
|
auto fg = util::fail_guard([&]() {
|
|
session::stop(*session);
|
|
});
|
|
|
|
while_starting_do_nothing(session->state);
|
|
|
|
auto ref = broadcast.ref();
|
|
auto port = recv_ping(ref, socket_e::video, session->video.peer, config::stream.ping_timeout);
|
|
if (port < 0) {
|
|
return;
|
|
}
|
|
|
|
// Enable QoS tagging on video traffic if requested by the client
|
|
if (session->config.videoQosType) {
|
|
auto address = session->video.peer.address();
|
|
session->video.qos = std::move(platf::enable_socket_qos(ref->video_sock.native_handle(), address,
|
|
session->video.peer.port(), platf::qos_data_type_e::video));
|
|
}
|
|
|
|
BOOST_LOG(debug) << "Start capturing Video"sv;
|
|
video::capture(session->mail, session->config.monitor, session);
|
|
}
|
|
|
|
void
|
|
audioThread(session_t *session) {
|
|
auto fg = util::fail_guard([&]() {
|
|
session::stop(*session);
|
|
});
|
|
|
|
while_starting_do_nothing(session->state);
|
|
|
|
auto ref = broadcast.ref();
|
|
auto port = recv_ping(ref, socket_e::audio, session->audio.peer, config::stream.ping_timeout);
|
|
if (port < 0) {
|
|
return;
|
|
}
|
|
|
|
// Enable QoS tagging on audio traffic if requested by the client
|
|
if (session->config.audioQosType) {
|
|
auto address = session->audio.peer.address();
|
|
session->audio.qos = std::move(platf::enable_socket_qos(ref->audio_sock.native_handle(), address,
|
|
session->audio.peer.port(), platf::qos_data_type_e::audio));
|
|
}
|
|
|
|
BOOST_LOG(debug) << "Start capturing Audio"sv;
|
|
audio::capture(session->mail, session->config.audio, session);
|
|
}
|
|
|
|
namespace session {
|
|
std::atomic_uint running_sessions;
|
|
|
|
state_e
|
|
state(session_t &session) {
|
|
return session.state.load(std::memory_order_relaxed);
|
|
}
|
|
|
|
void
|
|
stop(session_t &session) {
|
|
while_starting_do_nothing(session.state);
|
|
auto expected = state_e::RUNNING;
|
|
auto already_stopping = !session.state.compare_exchange_strong(expected, state_e::STOPPING);
|
|
if (already_stopping) {
|
|
return;
|
|
}
|
|
|
|
session.shutdown_event->raise(true);
|
|
}
|
|
|
|
void
|
|
join(session_t &session) {
|
|
// Current Nvidia drivers have a bug where NVENC can deadlock the encoder thread with hardware-accelerated
|
|
// GPU scheduling enabled. If this happens, we will terminate ourselves and the service can restart.
|
|
// The alternative is that Sunshine can never start another session until it's manually restarted.
|
|
auto task = []() {
|
|
BOOST_LOG(fatal) << "Hang detected! Session failed to terminate in 10 seconds."sv;
|
|
log_flush();
|
|
std::abort();
|
|
};
|
|
auto force_kill = task_pool.pushDelayed(task, 10s).task_id;
|
|
auto fg = util::fail_guard([&force_kill]() {
|
|
// Cancel the kill task if we manage to return from this function
|
|
task_pool.cancel(force_kill);
|
|
});
|
|
|
|
BOOST_LOG(debug) << "Waiting for video to end..."sv;
|
|
session.videoThread.join();
|
|
BOOST_LOG(debug) << "Waiting for audio to end..."sv;
|
|
session.audioThread.join();
|
|
BOOST_LOG(debug) << "Waiting for control to end..."sv;
|
|
session.controlEnd.view();
|
|
// Reset input on session stop to avoid stuck repeated keys
|
|
BOOST_LOG(debug) << "Resetting Input..."sv;
|
|
input::reset(session.input);
|
|
|
|
BOOST_LOG(debug) << "Removing references to any connections..."sv;
|
|
{
|
|
auto video_addr = session.video.peer.address().to_string();
|
|
auto audio_addr = session.audio.peer.address().to_string();
|
|
|
|
auto video_port = session.video.peer.port();
|
|
auto audio_port = session.audio.peer.port();
|
|
|
|
auto &connections = session.broadcast_ref->audio_video_connections;
|
|
|
|
auto lg = connections.lock();
|
|
|
|
auto validate_size = connections->size();
|
|
for (auto it = std::begin(*connections); it != std::end(*connections);) {
|
|
TUPLE_2D_REF(addr, port, *it);
|
|
|
|
if ((video_port == port && video_addr == addr) ||
|
|
(audio_port == port && audio_addr == addr)) {
|
|
it = connections->erase(it);
|
|
}
|
|
else {
|
|
++it;
|
|
}
|
|
}
|
|
|
|
auto new_size = connections->size();
|
|
if (validate_size != new_size + 2) {
|
|
BOOST_LOG(warning) << "Couldn't remove reference to session connections: ending all broadcasts"sv;
|
|
|
|
// A reference to the event object is still stored somewhere else. So no need to keep
|
|
// a reference to it.
|
|
mail::man->event<bool>(mail::broadcast_shutdown)->raise(true);
|
|
}
|
|
}
|
|
|
|
// If this is the last session, invoke the platform callbacks
|
|
if (--running_sessions == 0) {
|
|
platf::streaming_will_stop();
|
|
}
|
|
|
|
BOOST_LOG(debug) << "Session ended"sv;
|
|
}
|
|
|
|
int
|
|
start(session_t &session, const std::string &addr_string) {
|
|
session.input = input::alloc(session.mail);
|
|
|
|
session.broadcast_ref = broadcast.ref();
|
|
if (!session.broadcast_ref) {
|
|
return -1;
|
|
}
|
|
|
|
session.broadcast_ref->control_server.emplace_addr_to_session(addr_string, session);
|
|
|
|
auto addr = boost::asio::ip::make_address(addr_string);
|
|
session.video.peer.address(addr);
|
|
session.video.peer.port(0);
|
|
|
|
session.audio.peer.address(addr);
|
|
session.audio.peer.port(0);
|
|
|
|
{
|
|
auto &connections = session.broadcast_ref->audio_video_connections;
|
|
|
|
auto lg = connections.lock();
|
|
|
|
// allocate a location for connections
|
|
connections->emplace_back(addr_string, 0);
|
|
connections->emplace_back(addr_string, 0);
|
|
}
|
|
|
|
session.pingTimeout = std::chrono::steady_clock::now() + config::stream.ping_timeout;
|
|
|
|
session.audioThread = std::thread { audioThread, &session };
|
|
session.videoThread = std::thread { videoThread, &session };
|
|
|
|
session.state.store(state_e::RUNNING, std::memory_order_relaxed);
|
|
|
|
// If this is the first session, invoke the platform callbacks
|
|
if (++running_sessions == 1) {
|
|
platf::streaming_will_start();
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
std::shared_ptr<session_t>
|
|
alloc(config_t &config, crypto::aes_t &gcm_key, crypto::aes_t &iv) {
|
|
auto session = std::make_shared<session_t>();
|
|
|
|
auto mail = std::make_shared<safe::mail_raw_t>();
|
|
|
|
session->shutdown_event = mail->event<bool>(mail::shutdown);
|
|
|
|
session->config = config;
|
|
|
|
session->control.rumble_queue = mail->queue<platf::rumble_t>(mail::rumble);
|
|
session->control.hdr_queue = mail->event<video::hdr_info_t>(mail::hdr);
|
|
session->control.iv = iv;
|
|
session->control.cipher = crypto::cipher::gcm_t {
|
|
gcm_key, false
|
|
};
|
|
|
|
session->video.idr_events = mail->event<bool>(mail::idr);
|
|
session->video.lowseq = 0;
|
|
|
|
constexpr auto max_block_size = crypto::cipher::round_to_pkcs7_padded(2048);
|
|
|
|
util::buffer_t<char> shards { RTPA_TOTAL_SHARDS * max_block_size };
|
|
util::buffer_t<uint8_t *> shards_p { RTPA_TOTAL_SHARDS };
|
|
|
|
for (auto x = 0; x < RTPA_TOTAL_SHARDS; ++x) {
|
|
shards_p[x] = (uint8_t *) &shards[x * max_block_size];
|
|
}
|
|
|
|
// Audio FEC spans multiple audio packets,
|
|
// therefore its session specific
|
|
session->audio.shards = std::move(shards);
|
|
session->audio.shards_p = std::move(shards_p);
|
|
|
|
session->audio.fec_packet.reset((audio_fec_packet_raw_t *) malloc(sizeof(audio_fec_packet_raw_t) + max_block_size));
|
|
|
|
session->audio.fec_packet->rtp.header = 0x80;
|
|
session->audio.fec_packet->rtp.packetType = 127;
|
|
session->audio.fec_packet->rtp.timestamp = 0;
|
|
session->audio.fec_packet->rtp.ssrc = 0;
|
|
|
|
session->audio.fec_packet->fecHeader.payloadType = 97;
|
|
session->audio.fec_packet->fecHeader.ssrc = 0;
|
|
|
|
session->audio.cipher = crypto::cipher::cbc_t {
|
|
gcm_key, true
|
|
};
|
|
|
|
session->audio.avRiKeyId = util::endian::big(*(std::uint32_t *) iv.data());
|
|
session->audio.sequenceNumber = 0;
|
|
session->audio.timestamp = 0;
|
|
|
|
session->control.peer = nullptr;
|
|
session->state.store(state_e::STOPPED, std::memory_order_relaxed);
|
|
|
|
session->mail = std::move(mail);
|
|
|
|
return session;
|
|
}
|
|
} // namespace session
|
|
} // namespace stream
|