mirror of
https://github.com/ossrs/srs.git
synced 2025-02-15 04:42:04 +00:00
c5e067fb0b
fix https://github.com/ossrs/srs/issues/3155 Build srt-1-fit fails with `standard attributes in middle of decl-specifiers` on GCC 12,Arch Linux. See https://github.com/Haivision/srt/releases/tag/v1.5.3
809 lines
30 KiB
C++
809 lines
30 KiB
C++
/*
|
|
* SRT - Secure, Reliable, Transport
|
|
* Copyright (c) 2020 Haivision Systems Inc.
|
|
*
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
|
|
*
|
|
*/
|
|
|
|
/*****************************************************************************
|
|
Written by
|
|
Haivision Systems Inc.
|
|
*****************************************************************************/
|
|
|
|
#ifndef INC_SRT_GROUP_H
|
|
#define INC_SRT_GROUP_H
|
|
|
|
#include "srt.h"
|
|
#include "common.h"
|
|
#include "packet.h"
|
|
#include "group_common.h"
|
|
#include "group_backup.h"
|
|
|
|
namespace srt
|
|
{
|
|
|
|
#if ENABLE_HEAVY_LOGGING
|
|
const char* const srt_log_grp_state[] = {"PENDING", "IDLE", "RUNNING", "BROKEN"};
|
|
#endif
|
|
|
|
|
|
class CUDTGroup
|
|
{
|
|
friend class CUDTUnited;
|
|
|
|
typedef sync::steady_clock::time_point time_point;
|
|
typedef sync::steady_clock::duration duration;
|
|
typedef sync::steady_clock steady_clock;
|
|
typedef groups::SocketData SocketData;
|
|
typedef groups::SendBackupCtx SendBackupCtx;
|
|
typedef groups::BackupMemberState BackupMemberState;
|
|
|
|
public:
|
|
typedef SRT_MEMBERSTATUS GroupState;
|
|
|
|
// Note that the use of states may differ in particular group types:
|
|
//
|
|
// Broadcast: links that are freshly connected become PENDING and then IDLE only
|
|
// for a short moment to be activated immediately at the nearest sending operation.
|
|
//
|
|
// Balancing: like with broadcast, just that the link activation gets its shared percentage
|
|
// of traffic balancing
|
|
//
|
|
// Multicast: The link is never idle. The data are always sent over the UDP multicast link
|
|
// and the receiver simply gets subscribed and reads packets once it's ready.
|
|
//
|
|
// Backup: The link stays idle until it's activated, and the activation can only happen
|
|
// at the moment when the currently active link is "suspected of being likely broken"
|
|
// (the current active link fails to receive ACK in a time when two ACKs should already
|
|
// be received). After a while when the current active link is confirmed broken, it turns
|
|
// into broken state.
|
|
|
|
static const char* StateStr(GroupState);
|
|
|
|
static int32_t s_tokenGen;
|
|
static int32_t genToken() { ++s_tokenGen; if (s_tokenGen < 0) s_tokenGen = 0; return s_tokenGen;}
|
|
|
|
struct ConfigItem
|
|
{
|
|
SRT_SOCKOPT so;
|
|
std::vector<unsigned char> value;
|
|
|
|
template <class T>
|
|
bool get(T& refr)
|
|
{
|
|
if (sizeof(T) > value.size())
|
|
return false;
|
|
refr = *(T*)&value[0];
|
|
return true;
|
|
}
|
|
|
|
ConfigItem(SRT_SOCKOPT o, const void* val, int size)
|
|
: so(o)
|
|
{
|
|
value.resize(size);
|
|
unsigned char* begin = (unsigned char*)val;
|
|
std::copy(begin, begin + size, value.begin());
|
|
}
|
|
|
|
struct OfType
|
|
{
|
|
SRT_SOCKOPT so;
|
|
OfType(SRT_SOCKOPT soso)
|
|
: so(soso)
|
|
{
|
|
}
|
|
bool operator()(ConfigItem& ci) { return ci.so == so; }
|
|
};
|
|
};
|
|
|
|
typedef std::list<SocketData> group_t;
|
|
typedef group_t::iterator gli_t;
|
|
typedef std::vector< std::pair<SRTSOCKET, srt::CUDTSocket*> > sendable_t;
|
|
|
|
struct Sendstate
|
|
{
|
|
SRTSOCKET id;
|
|
SocketData* mb;
|
|
int stat;
|
|
int code;
|
|
};
|
|
|
|
CUDTGroup(SRT_GROUP_TYPE);
|
|
~CUDTGroup();
|
|
|
|
SocketData* add(SocketData data);
|
|
|
|
struct HaveID
|
|
{
|
|
SRTSOCKET id;
|
|
HaveID(SRTSOCKET sid)
|
|
: id(sid)
|
|
{
|
|
}
|
|
bool operator()(const SocketData& s) { return s.id == id; }
|
|
};
|
|
|
|
bool contains(SRTSOCKET id, SocketData*& w_f)
|
|
{
|
|
srt::sync::ScopedLock g(m_GroupLock);
|
|
gli_t f = std::find_if(m_Group.begin(), m_Group.end(), HaveID(id));
|
|
if (f == m_Group.end())
|
|
{
|
|
w_f = NULL;
|
|
return false;
|
|
}
|
|
w_f = &*f;
|
|
return true;
|
|
}
|
|
|
|
// NEED LOCKING
|
|
gli_t begin() { return m_Group.begin(); }
|
|
gli_t end() { return m_Group.end(); }
|
|
|
|
/// Remove the socket from the group container.
|
|
/// REMEMBER: the group spec should be taken from the socket
|
|
/// (set m_GroupOf and m_GroupMemberData to NULL
|
|
/// PRIOR TO calling this function.
|
|
/// @param id Socket ID to look for in the container to remove
|
|
/// @return true if the container still contains any sockets after the operation
|
|
bool remove(SRTSOCKET id)
|
|
{
|
|
using srt_logging::gmlog;
|
|
srt::sync::ScopedLock g(m_GroupLock);
|
|
|
|
bool empty = false;
|
|
LOGC(gmlog.Note, log << "group/remove: removing member @" << id << " from group $" << m_GroupID);
|
|
|
|
gli_t f = std::find_if(m_Group.begin(), m_Group.end(), HaveID(id));
|
|
if (f != m_Group.end())
|
|
{
|
|
m_Group.erase(f);
|
|
|
|
// Reset sequence numbers on a dead group so that they are
|
|
// initialized anew with the new alive connection within
|
|
// the group.
|
|
// XXX The problem is that this should be done after the
|
|
// socket is considered DISCONNECTED, not when it's being
|
|
// closed. After being disconnected, the sequence numbers
|
|
// are no longer valid, and will be reinitialized when the
|
|
// socket is connected again. This may stay as is for now
|
|
// as in SRT it's not predicted to do anything with the socket
|
|
// that was disconnected other than immediately closing it.
|
|
if (m_Group.empty())
|
|
{
|
|
// When the group is empty, there's no danger that this
|
|
// number will collide with any ISN provided by a socket.
|
|
// Also since now every socket will derive this ISN.
|
|
m_iLastSchedSeqNo = generateISN();
|
|
resetInitialRxSequence();
|
|
empty = true;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
HLOGC(gmlog.Debug, log << "group/remove: IPE: id @" << id << " NOT FOUND");
|
|
empty = true; // not exactly true, but this is to cause error on group in the APP
|
|
}
|
|
|
|
if (m_Group.empty())
|
|
{
|
|
m_bOpened = false;
|
|
m_bConnected = false;
|
|
}
|
|
|
|
return !empty;
|
|
}
|
|
|
|
bool groupEmpty()
|
|
{
|
|
srt::sync::ScopedLock g(m_GroupLock);
|
|
return m_Group.empty();
|
|
}
|
|
|
|
void setGroupConnected();
|
|
|
|
int send(const char* buf, int len, SRT_MSGCTRL& w_mc);
|
|
int sendBroadcast(const char* buf, int len, SRT_MSGCTRL& w_mc);
|
|
int sendBackup(const char* buf, int len, SRT_MSGCTRL& w_mc);
|
|
static int32_t generateISN();
|
|
|
|
private:
|
|
// For Backup, sending all previous packet
|
|
int sendBackupRexmit(srt::CUDT& core, SRT_MSGCTRL& w_mc);
|
|
|
|
// Support functions for sendBackup and sendBroadcast
|
|
/// Check if group member is idle.
|
|
/// @param d group member
|
|
/// @param[in,out] w_wipeme array of sockets to remove from group
|
|
/// @param[in,out] w_pendingLinks array of sockets pending for connection
|
|
/// @returns true if d is idle (standby), false otherwise
|
|
bool send_CheckIdle(const gli_t d, std::vector<SRTSOCKET>& w_wipeme, std::vector<SRTSOCKET>& w_pendingLinks);
|
|
|
|
|
|
/// This function checks if the member has just become idle (check if sender buffer is empty) to send a KEEPALIVE immidiatelly.
|
|
/// @todo Check it is some abandoned logic.
|
|
void sendBackup_CheckIdleTime(gli_t w_d);
|
|
|
|
/// Qualify states of member links.
|
|
/// [[using locked(this->m_GroupLock, m_pGlobal->m_GlobControlLock)]]
|
|
/// @param[out] w_sendBackupCtx the context will be updated with state qualifications
|
|
/// @param[in] currtime current timestamp
|
|
void sendBackup_QualifyMemberStates(SendBackupCtx& w_sendBackupCtx, const steady_clock::time_point& currtime);
|
|
|
|
void sendBackup_AssignBackupState(srt::CUDT& socket, BackupMemberState state, const steady_clock::time_point& currtime);
|
|
|
|
/// Qualify the state of the active link: fresh, stable, unstable, wary.
|
|
/// @retval active backup member state: fresh, stable, unstable, wary.
|
|
BackupMemberState sendBackup_QualifyActiveState(const gli_t d, const time_point currtime);
|
|
|
|
BackupMemberState sendBackup_QualifyIfStandBy(const gli_t d);
|
|
|
|
/// Sends the same payload over all active members.
|
|
/// @param[in] buf payload
|
|
/// @param[in] len payload length in bytes
|
|
/// @param[in,out] w_mc message control
|
|
/// @param[in] currtime current time
|
|
/// @param[in] currseq current packet sequence number
|
|
/// @param[out] w_nsuccessful number of members with successfull sending.
|
|
/// @param[in,out] maxActiveWeight
|
|
/// @param[in,out] sendBackupCtx context
|
|
/// @param[in,out] w_cx error
|
|
/// @return group send result: -1 if sending over all members has failed; number of bytes sent overwise.
|
|
int sendBackup_SendOverActive(const char* buf, int len, SRT_MSGCTRL& w_mc, const steady_clock::time_point& currtime, int32_t& w_curseq,
|
|
size_t& w_nsuccessful, uint16_t& w_maxActiveWeight, SendBackupCtx& w_sendBackupCtx, CUDTException& w_cx);
|
|
|
|
/// Check link sending status
|
|
/// @param[in] currtime Current time (logging only)
|
|
/// @param[in] send_status Result of sending over the socket
|
|
/// @param[in] lastseq Last sent sequence number before the current sending operation
|
|
/// @param[in] pktseq Packet sequence number currently tried to be sent
|
|
/// @param[out] w_u CUDT unit of the current member (to allow calling overrideSndSeqNo)
|
|
/// @param[out] w_curseq Group's current sequence number (either -1 or the value used already for other links)
|
|
/// @param[out] w_final_stat w_final_stat = send_status if sending succeeded.
|
|
///
|
|
/// @returns true if the sending operation result (submitted in stat) is a success, false otherwise.
|
|
bool sendBackup_CheckSendStatus(const time_point& currtime,
|
|
const int send_status,
|
|
const int32_t lastseq,
|
|
const int32_t pktseq,
|
|
CUDT& w_u,
|
|
int32_t& w_curseq,
|
|
int& w_final_stat);
|
|
void sendBackup_Buffering(const char* buf, const int len, int32_t& curseq, SRT_MSGCTRL& w_mc);
|
|
|
|
size_t sendBackup_TryActivateStandbyIfNeeded(
|
|
const char* buf,
|
|
const int len,
|
|
bool& w_none_succeeded,
|
|
SRT_MSGCTRL& w_mc,
|
|
int32_t& w_curseq,
|
|
int32_t& w_final_stat,
|
|
SendBackupCtx& w_sendBackupCtx,
|
|
CUDTException& w_cx,
|
|
const steady_clock::time_point& currtime);
|
|
|
|
/// Check if pending sockets are to be qualified as broken.
|
|
/// This qualification later results in removing the socket from a group and closing it.
|
|
/// @param[in,out] a context with a list of member sockets, some pending might qualified broken
|
|
void sendBackup_CheckPendingSockets(SendBackupCtx& w_sendBackupCtx, const steady_clock::time_point& currtime);
|
|
|
|
/// Check if unstable sockets are to be qualified as broken.
|
|
/// The main reason for such qualification is if a socket is unstable for too long.
|
|
/// This qualification later results in removing the socket from a group and closing it.
|
|
/// @param[in,out] a context with a list of member sockets, some pending might qualified broken
|
|
void sendBackup_CheckUnstableSockets(SendBackupCtx& w_sendBackupCtx, const steady_clock::time_point& currtime);
|
|
|
|
/// @brief Marks broken sockets as closed. Used in broadcast sending.
|
|
/// @param w_wipeme a list of sockets to close
|
|
void send_CloseBrokenSockets(std::vector<SRTSOCKET>& w_wipeme);
|
|
|
|
/// @brief Marks broken sockets as closed. Used in backup sending.
|
|
/// @param w_sendBackupCtx the context with a list of broken sockets
|
|
void sendBackup_CloseBrokenSockets(SendBackupCtx& w_sendBackupCtx);
|
|
|
|
void sendBackup_RetryWaitBlocked(SendBackupCtx& w_sendBackupCtx,
|
|
int& w_final_stat,
|
|
bool& w_none_succeeded,
|
|
SRT_MSGCTRL& w_mc,
|
|
CUDTException& w_cx);
|
|
void sendBackup_SilenceRedundantLinks(SendBackupCtx& w_sendBackupCtx, const steady_clock::time_point& currtime);
|
|
|
|
void send_CheckValidSockets();
|
|
|
|
public:
|
|
int recv(char* buf, int len, SRT_MSGCTRL& w_mc);
|
|
|
|
void close();
|
|
|
|
void setOpt(SRT_SOCKOPT optname, const void* optval, int optlen);
|
|
void getOpt(SRT_SOCKOPT optName, void* optval, int& w_optlen);
|
|
void deriveSettings(srt::CUDT* source);
|
|
bool applyFlags(uint32_t flags, HandshakeSide);
|
|
|
|
SRT_SOCKSTATUS getStatus();
|
|
|
|
void debugMasterData(SRTSOCKET slave);
|
|
|
|
bool isGroupReceiver()
|
|
{
|
|
// XXX add here also other group types, which
|
|
// predict group receiving.
|
|
return m_type == SRT_GTYPE_BROADCAST;
|
|
}
|
|
|
|
sync::Mutex* exp_groupLock() { return &m_GroupLock; }
|
|
void addEPoll(int eid);
|
|
void removeEPollEvents(const int eid);
|
|
void removeEPollID(const int eid);
|
|
|
|
/// @brief Update read-ready state.
|
|
/// @param sock member socket ID (unused)
|
|
/// @param sequence the latest packet sequence number available for reading.
|
|
void updateReadState(SRTSOCKET sock, int32_t sequence);
|
|
|
|
void updateWriteState();
|
|
void updateFailedLink();
|
|
void activateUpdateEvent(bool still_have_items);
|
|
int32_t getRcvBaseSeqNo();
|
|
|
|
/// Update the in-group array of packet providers per sequence number.
|
|
/// Also basing on the information already provided by possibly other sockets,
|
|
/// report the real status of packet loss, including packets maybe lost
|
|
/// by the caller provider, but already received from elsewhere. Note that
|
|
/// these packets are not ready for extraction until ACK-ed.
|
|
///
|
|
/// @param exp_sequence The previously received sequence at this socket
|
|
/// @param sequence The sequence of this packet
|
|
/// @param provider The core of the socket for which the packet was dispatched
|
|
/// @param time TSBPD time of this packet
|
|
/// @return The bitmap that marks by 'false' packets lost since next to exp_sequence
|
|
std::vector<bool> providePacket(int32_t exp_sequence, int32_t sequence, srt::CUDT* provider, uint64_t time);
|
|
|
|
/// This is called from the ACK action by particular socket, which
|
|
/// actually signs off the packet for extraction.
|
|
///
|
|
/// @param core The socket core for which the ACK was sent
|
|
/// @param ack The past-the-last-received ACK sequence number
|
|
void readyPackets(srt::CUDT* core, int32_t ack);
|
|
|
|
void syncWithSocket(const srt::CUDT& core, const HandshakeSide side);
|
|
int getGroupData(SRT_SOCKGROUPDATA* pdata, size_t* psize);
|
|
int getGroupData_LOCKED(SRT_SOCKGROUPDATA* pdata, size_t* psize);
|
|
|
|
/// Predicted to be called from the reading function to fill
|
|
/// the group data array as requested.
|
|
void fillGroupData(SRT_MSGCTRL& w_out, //< MSGCTRL to be written
|
|
const SRT_MSGCTRL& in //< MSGCTRL read from the data-providing socket
|
|
);
|
|
|
|
void copyGroupData(const CUDTGroup::SocketData& source, SRT_SOCKGROUPDATA& w_target);
|
|
|
|
#if ENABLE_HEAVY_LOGGING
|
|
void debugGroup();
|
|
#else
|
|
void debugGroup() {}
|
|
#endif
|
|
|
|
void ackMessage(int32_t msgno);
|
|
void processKeepalive(SocketData*);
|
|
void internalKeepalive(SocketData*);
|
|
|
|
private:
|
|
// Check if there's at least one connected socket.
|
|
// If so, grab the status of all member sockets.
|
|
void getGroupCount(size_t& w_size, bool& w_still_alive);
|
|
|
|
srt::CUDTUnited& m_Global;
|
|
srt::sync::Mutex m_GroupLock;
|
|
|
|
SRTSOCKET m_GroupID;
|
|
SRTSOCKET m_PeerGroupID;
|
|
struct GroupContainer
|
|
{
|
|
private:
|
|
std::list<SocketData> m_List;
|
|
sync::atomic<size_t> m_SizeCache;
|
|
|
|
/// This field is used only by some types of groups that need
|
|
/// to keep track as to which link was lately used. Note that
|
|
/// by removal of a node from the m_List container, this link
|
|
/// must be appropriately reset.
|
|
gli_t m_LastActiveLink;
|
|
|
|
public:
|
|
|
|
GroupContainer()
|
|
: m_SizeCache(0)
|
|
, m_LastActiveLink(m_List.end())
|
|
{
|
|
}
|
|
|
|
// Property<gli_t> active = { m_LastActiveLink; }
|
|
SRTU_PROPERTY_RW(gli_t, active, m_LastActiveLink);
|
|
|
|
gli_t begin() { return m_List.begin(); }
|
|
gli_t end() { return m_List.end(); }
|
|
bool empty() { return m_List.empty(); }
|
|
void push_back(const SocketData& data) { m_List.push_back(data); ++m_SizeCache; }
|
|
void clear()
|
|
{
|
|
m_LastActiveLink = end();
|
|
m_List.clear();
|
|
m_SizeCache = 0;
|
|
}
|
|
size_t size() { return m_SizeCache; }
|
|
|
|
void erase(gli_t it);
|
|
};
|
|
GroupContainer m_Group;
|
|
SRT_GROUP_TYPE m_type;
|
|
CUDTSocket* m_listener; // A "group" can only have one listener.
|
|
srt::sync::atomic<int> m_iBusy;
|
|
CallbackHolder<srt_connect_callback_fn> m_cbConnectHook;
|
|
void installConnectHook(srt_connect_callback_fn* hook, void* opaq)
|
|
{
|
|
m_cbConnectHook.set(opaq, hook);
|
|
}
|
|
|
|
public:
|
|
void apiAcquire() { ++m_iBusy; }
|
|
void apiRelease() { --m_iBusy; }
|
|
|
|
// A normal cycle of the send/recv functions is the following:
|
|
// - [Initial API call for a group]
|
|
// - GroupKeeper - ctor
|
|
// - LOCK: GlobControlLock
|
|
// - Find the group ID in the group container (break if not found)
|
|
// - LOCK: GroupLock of that group
|
|
// - Set BUSY flag
|
|
// - UNLOCK GroupLock
|
|
// - UNLOCK GlobControlLock
|
|
// - [Call the sending function (sendBroadcast/sendBackup)]
|
|
// - LOCK GroupLock
|
|
// - Preparation activities
|
|
// - Loop over group members
|
|
// - Send over a single socket
|
|
// - Check send status and conditions
|
|
// - Exit, if nothing else to be done
|
|
// - Check links to send extra
|
|
// - UNLOCK GroupLock
|
|
// - Wait for first ready link
|
|
// - LOCK GroupLock
|
|
// - Check status and find sendable link
|
|
// - Send over a single socket
|
|
// - Check status and update data
|
|
// - UNLOCK GroupLock, Exit
|
|
// - GroupKeeper - dtor
|
|
// - LOCK GroupLock
|
|
// - Clear BUSY flag
|
|
// - UNLOCK GroupLock
|
|
// END.
|
|
//
|
|
// The possibility for isStillBusy to go on is only the following:
|
|
// 1. Before calling the API function. As GlobControlLock is locked,
|
|
// the nearest lock on GlobControlLock by GroupKeeper can happen:
|
|
// - before the group is moved to ClosedGroups (this allows it to be found)
|
|
// - after the group is moved to ClosedGroups (this makes the group not found)
|
|
// - NOT after the group was deleted, as it could not be found and occupied.
|
|
//
|
|
// 2. Before release of GlobControlLock (acquired by GC), but before the
|
|
// API function locks GroupLock:
|
|
// - the GC call to isStillBusy locks GroupLock, but BUSY flag is already set
|
|
// - GC then avoids deletion of the group
|
|
//
|
|
// 3. In any further place up to the exit of the API implementation function,
|
|
// the BUSY flag is still set.
|
|
//
|
|
// 4. After exit of GroupKeeper destructor and unlock of GroupLock
|
|
// - the group is no longer being accessed and can be freely deleted.
|
|
// - the group also can no longer be found by ID.
|
|
|
|
bool isStillBusy()
|
|
{
|
|
sync::ScopedLock glk(m_GroupLock);
|
|
return m_iBusy || !m_Group.empty();
|
|
}
|
|
|
|
struct BufferedMessageStorage
|
|
{
|
|
size_t blocksize;
|
|
size_t maxstorage;
|
|
std::vector<char*> storage;
|
|
|
|
BufferedMessageStorage(size_t blk, size_t max = 0)
|
|
: blocksize(blk)
|
|
, maxstorage(max)
|
|
, storage()
|
|
{
|
|
}
|
|
|
|
char* get()
|
|
{
|
|
if (storage.empty())
|
|
return new char[blocksize];
|
|
|
|
// Get the element from the end
|
|
char* block = storage.back();
|
|
storage.pop_back();
|
|
return block;
|
|
}
|
|
|
|
void put(char* block)
|
|
{
|
|
if (storage.size() >= maxstorage)
|
|
{
|
|
// Simply delete
|
|
delete[] block;
|
|
return;
|
|
}
|
|
|
|
// Put the block into the spare buffer
|
|
storage.push_back(block);
|
|
}
|
|
|
|
~BufferedMessageStorage()
|
|
{
|
|
for (size_t i = 0; i < storage.size(); ++i)
|
|
delete[] storage[i];
|
|
}
|
|
};
|
|
|
|
struct BufferedMessage
|
|
{
|
|
static BufferedMessageStorage storage;
|
|
|
|
SRT_MSGCTRL mc;
|
|
mutable char* data;
|
|
size_t size;
|
|
|
|
BufferedMessage()
|
|
: data()
|
|
, size()
|
|
{
|
|
}
|
|
~BufferedMessage()
|
|
{
|
|
if (data)
|
|
storage.put(data);
|
|
}
|
|
|
|
// NOTE: size 's' must be checked against SRT_LIVE_MAX_PLSIZE
|
|
// before calling
|
|
void copy(const char* buf, size_t s)
|
|
{
|
|
size = s;
|
|
data = storage.get();
|
|
memcpy(data, buf, s);
|
|
}
|
|
|
|
BufferedMessage(const BufferedMessage& foreign)
|
|
: mc(foreign.mc)
|
|
, data(foreign.data)
|
|
, size(foreign.size)
|
|
{
|
|
foreign.data = 0;
|
|
}
|
|
|
|
BufferedMessage& operator=(const BufferedMessage& foreign)
|
|
{
|
|
data = foreign.data;
|
|
size = foreign.size;
|
|
mc = foreign.mc;
|
|
|
|
foreign.data = 0;
|
|
return *this;
|
|
}
|
|
|
|
private:
|
|
void swap_with(BufferedMessage& b)
|
|
{
|
|
std::swap(this->mc, b.mc);
|
|
std::swap(this->data, b.data);
|
|
std::swap(this->size, b.size);
|
|
}
|
|
};
|
|
|
|
typedef std::deque<BufferedMessage> senderBuffer_t;
|
|
// typedef StaticBuffer<BufferedMessage, 1000> senderBuffer_t;
|
|
|
|
private:
|
|
// Fields required for SRT_GTYPE_BACKUP groups.
|
|
senderBuffer_t m_SenderBuffer;
|
|
int32_t m_iSndOldestMsgNo; // oldest position in the sender buffer
|
|
sync::atomic<int32_t> m_iSndAckedMsgNo;
|
|
uint32_t m_uOPT_MinStabilityTimeout_us;
|
|
|
|
// THIS function must be called only in a function for a group type
|
|
// that does use sender buffer.
|
|
int32_t addMessageToBuffer(const char* buf, size_t len, SRT_MSGCTRL& w_mc);
|
|
|
|
std::set<int> m_sPollID; // set of epoll ID to trigger
|
|
int m_iMaxPayloadSize;
|
|
int m_iAvgPayloadSize;
|
|
bool m_bSynRecving;
|
|
bool m_bSynSending;
|
|
bool m_bTsbPd;
|
|
bool m_bTLPktDrop;
|
|
int64_t m_iTsbPdDelay_us;
|
|
int m_RcvEID;
|
|
class CEPollDesc* m_RcvEpolld;
|
|
int m_SndEID;
|
|
class CEPollDesc* m_SndEpolld;
|
|
|
|
int m_iSndTimeOut; // sending timeout in milliseconds
|
|
int m_iRcvTimeOut; // receiving timeout in milliseconds
|
|
|
|
// Start times for TsbPd. These times shall be synchronized
|
|
// between all sockets in the group. The first connected one
|
|
// defines it, others shall derive it. The value 0 decides if
|
|
// this has been already set.
|
|
time_point m_tsStartTime;
|
|
time_point m_tsRcvPeerStartTime;
|
|
|
|
void recv_CollectAliveAndBroken(std::vector<srt::CUDTSocket*>& w_alive, std::set<srt::CUDTSocket*>& w_broken);
|
|
|
|
/// The function polls alive member sockets and retrieves a list of read-ready.
|
|
/// [acquires lock for CUDT::uglobal()->m_GlobControlLock]
|
|
/// [[using locked(m_GroupLock)]] temporally unlocks-locks internally
|
|
///
|
|
/// @returns list of read-ready sockets
|
|
/// @throws CUDTException(MJ_CONNECTION, MN_NOCONN, 0)
|
|
/// @throws CUDTException(MJ_AGAIN, MN_RDAVAIL, 0)
|
|
std::vector<srt::CUDTSocket*> recv_WaitForReadReady(const std::vector<srt::CUDTSocket*>& aliveMembers, std::set<srt::CUDTSocket*>& w_broken);
|
|
|
|
// This is the sequence number of a packet that has been previously
|
|
// delivered. Initially it should be set to SRT_SEQNO_NONE so that the sequence read
|
|
// from the first delivering socket will be taken as a good deal.
|
|
sync::atomic<int32_t> m_RcvBaseSeqNo;
|
|
|
|
bool m_bOpened; // Set to true when at least one link is at least pending
|
|
bool m_bConnected; // Set to true on first link confirmed connected
|
|
bool m_bClosing;
|
|
|
|
// There's no simple way of transforming config
|
|
// items that are predicted to be used on socket.
|
|
// Use some options for yourself, store the others
|
|
// for setting later on a socket.
|
|
std::vector<ConfigItem> m_config;
|
|
|
|
// Signal for the blocking user thread that the packet
|
|
// is ready to deliver.
|
|
sync::Condition m_RcvDataCond;
|
|
sync::Mutex m_RcvDataLock;
|
|
sync::atomic<int32_t> m_iLastSchedSeqNo; // represetnts the value of CUDT::m_iSndNextSeqNo for each running socket
|
|
sync::atomic<int32_t> m_iLastSchedMsgNo;
|
|
// Statistics
|
|
|
|
struct Stats
|
|
{
|
|
// Stats state
|
|
time_point tsActivateTime; // Time when this group sent or received the first data packet
|
|
time_point tsLastSampleTime; // Time reset when clearing stats
|
|
|
|
stats::Metric<stats::BytesPackets> sent; // number of packets sent from the application
|
|
stats::Metric<stats::BytesPackets> recv; // number of packets delivered from the group to the application
|
|
stats::Metric<stats::BytesPackets> recvDrop; // number of packets dropped by the group receiver (not received from any member)
|
|
stats::Metric<stats::BytesPackets> recvDiscard; // number of packets discarded as already delivered
|
|
|
|
void init()
|
|
{
|
|
tsActivateTime = srt::sync::steady_clock::time_point();
|
|
tsLastSampleTime = srt::sync::steady_clock::now();
|
|
sent.reset();
|
|
recv.reset();
|
|
recvDrop.reset();
|
|
recvDiscard.reset();
|
|
}
|
|
|
|
void reset()
|
|
{
|
|
tsLastSampleTime = srt::sync::steady_clock::now();
|
|
|
|
sent.resetTrace();
|
|
recv.resetTrace();
|
|
recvDrop.resetTrace();
|
|
recvDiscard.resetTrace();
|
|
}
|
|
} m_stats;
|
|
|
|
void updateAvgPayloadSize(int size)
|
|
{
|
|
if (m_iAvgPayloadSize == -1)
|
|
m_iAvgPayloadSize = size;
|
|
else
|
|
m_iAvgPayloadSize = avg_iir<4>(m_iAvgPayloadSize, size);
|
|
}
|
|
|
|
int avgRcvPacketSize()
|
|
{
|
|
// In case when no packet has been received yet, but already notified
|
|
// a dropped packet, its size will be SRT_LIVE_DEF_PLSIZE. It will be
|
|
// the value most matching in the typical uses, although no matter what
|
|
// value would be used here, each one would be wrong from some points
|
|
// of view. This one is simply the best choice for typical uses of groups
|
|
// provided that they are to be ued only for live mode.
|
|
return m_iAvgPayloadSize == -1 ? SRT_LIVE_DEF_PLSIZE : m_iAvgPayloadSize;
|
|
}
|
|
|
|
public:
|
|
void bstatsSocket(CBytePerfMon* perf, bool clear);
|
|
|
|
// Required after the call on newGroup on the listener side.
|
|
// On the listener side the group is lazily created just before
|
|
// accepting a new socket and therefore always open.
|
|
void setOpen() { m_bOpened = true; }
|
|
|
|
std::string CONID() const
|
|
{
|
|
#if ENABLE_LOGGING
|
|
std::ostringstream os;
|
|
os << "@" << m_GroupID << ":";
|
|
return os.str();
|
|
#else
|
|
return "";
|
|
#endif
|
|
}
|
|
|
|
void resetInitialRxSequence()
|
|
{
|
|
// The app-reader doesn't care about the real sequence number.
|
|
// The first provided one will be taken as a good deal; even if
|
|
// this is going to be past the ISN, at worst it will be caused
|
|
// by TLPKTDROP.
|
|
m_RcvBaseSeqNo = SRT_SEQNO_NONE;
|
|
}
|
|
|
|
bool applyGroupTime(time_point& w_start_time, time_point& w_peer_start_time)
|
|
{
|
|
using srt::sync::is_zero;
|
|
using srt_logging::gmlog;
|
|
|
|
if (is_zero(m_tsStartTime))
|
|
{
|
|
// The first socket, defines the group time for the whole group.
|
|
m_tsStartTime = w_start_time;
|
|
m_tsRcvPeerStartTime = w_peer_start_time;
|
|
return true;
|
|
}
|
|
|
|
// Sanity check. This should never happen, fix the bug if found!
|
|
if (is_zero(m_tsRcvPeerStartTime))
|
|
{
|
|
LOGC(gmlog.Error, log << "IPE: only StartTime is set, RcvPeerStartTime still 0!");
|
|
// Kinda fallback, but that's not too safe.
|
|
m_tsRcvPeerStartTime = w_peer_start_time;
|
|
}
|
|
|
|
// The redundant connection, derive the times
|
|
w_start_time = m_tsStartTime;
|
|
w_peer_start_time = m_tsRcvPeerStartTime;
|
|
|
|
return false;
|
|
}
|
|
|
|
// Live state synchronization
|
|
bool getBufferTimeBase(srt::CUDT* forthesakeof, time_point& w_tb, bool& w_wp, duration& w_dr);
|
|
bool applyGroupSequences(SRTSOCKET, int32_t& w_snd_isn, int32_t& w_rcv_isn);
|
|
|
|
/// @brief Synchronize TSBPD base time and clock drift among members using the @a srcMember as a reference.
|
|
/// @param srcMember a reference for synchronization.
|
|
void synchronizeDrift(const srt::CUDT* srcMember);
|
|
|
|
void updateLatestRcv(srt::CUDTSocket*);
|
|
|
|
// Property accessors
|
|
SRTU_PROPERTY_RW_CHAIN(CUDTGroup, SRTSOCKET, id, m_GroupID);
|
|
SRTU_PROPERTY_RW_CHAIN(CUDTGroup, SRTSOCKET, peerid, m_PeerGroupID);
|
|
SRTU_PROPERTY_RW_CHAIN(CUDTGroup, SRT_GROUP_TYPE, type, m_type);
|
|
SRTU_PROPERTY_RW_CHAIN(CUDTGroup, int32_t, currentSchedSequence, m_iLastSchedSeqNo);
|
|
SRTU_PROPERTY_RRW(std::set<int>&, epollset, m_sPollID);
|
|
SRTU_PROPERTY_RW_CHAIN(CUDTGroup, int64_t, latency, m_iTsbPdDelay_us);
|
|
SRTU_PROPERTY_RO(bool, closing, m_bClosing);
|
|
};
|
|
|
|
} // namespace srt
|
|
|
|
#endif // INC_SRT_GROUP_H
|