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core.cpp
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core.cpp
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/*
* SRT - Secure, Reliable, Transport
* Copyright (c) 2018 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/.
*
*/
/*****************************************************************************
Copyright (c) 2001 - 2011, The Board of Trustees of the University of Illinois.
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above
copyright notice, this list of conditions and the
following disclaimer.
* Redistributions in binary form must reproduce the
above copyright notice, this list of conditions
and the following disclaimer in the documentation
and/or other materials provided with the distribution.
* Neither the name of the University of Illinois
nor the names of its contributors may be used to
endorse or promote products derived from this
software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*****************************************************************************/
/*****************************************************************************
written by
Yunhong Gu, last updated 02/28/2012
modified by
Haivision Systems Inc.
*****************************************************************************/
#include "platform_sys.h"
// Linux specific
#ifdef SRT_ENABLE_BINDTODEVICE
#include <linux/if.h>
#endif
#include <cmath>
#include <sstream>
#include <algorithm>
#include <iterator>
#include "srt.h"
#include "access_control.h" // Required for SRT_REJX_FALLBACK
#include "queue.h"
#include "api.h"
#include "core.h"
#include "logging.h"
#include "crypto.h"
#include "logging_api.h" // Required due to containing extern srt_logger_config
#include "logger_defs.h"
#if !HAVE_CXX11
// for pthread_once
#include <pthread.h>
#endif
// Again, just in case when some "smart guy" provided such a global macro
#ifdef min
#undef min
#endif
#ifdef max
#undef max
#endif
using namespace std;
using namespace srt;
using namespace srt::sync;
using namespace srt_logging;
const SRTSOCKET UDT::INVALID_SOCK = srt::CUDT::INVALID_SOCK;
const int UDT::ERROR = srt::CUDT::ERROR;
//#define SRT_CMD_HSREQ 1 /* SRT Handshake Request (sender) */
#define SRT_CMD_HSREQ_MINSZ 8 /* Minumum Compatible (1.x.x) packet size (bytes) */
#define SRT_CMD_HSREQ_SZ 12 /* Current version packet size */
#if SRT_CMD_HSREQ_SZ > SRT_CMD_MAXSZ
#error SRT_CMD_MAXSZ too small
#endif
/* Handshake Request (Network Order)
0[31..0]: SRT version SRT_DEF_VERSION
1[31..0]: Options 0 [ | SRT_OPT_TSBPDSND ][ | SRT_OPT_HAICRYPT ]
2[31..16]: TsbPD resv 0
2[15..0]: TsbPD delay [0..60000] msec
*/
//#define SRT_CMD_HSRSP 2 /* SRT Handshake Response (receiver) */
#define SRT_CMD_HSRSP_MINSZ 8 /* Minumum Compatible (1.x.x) packet size (bytes) */
#define SRT_CMD_HSRSP_SZ 12 /* Current version packet size */
#if SRT_CMD_HSRSP_SZ > SRT_CMD_MAXSZ
#error SRT_CMD_MAXSZ too small
#endif
/* Handshake Response (Network Order)
0[31..0]: SRT version SRT_DEF_VERSION
1[31..0]: Options 0 [ | SRT_OPT_TSBPDRCV [| SRT_OPT_TLPKTDROP ]][ | SRT_OPT_HAICRYPT]
[ | SRT_OPT_NAKREPORT ] [ | SRT_OPT_REXMITFLG ]
2[31..16]: TsbPD resv 0
2[15..0]: TsbPD delay [0..60000] msec
*/
// IMPORTANT!!! This array must be ordered by value, because std::binary_search is performed on it!
extern const SRT_SOCKOPT srt_post_opt_list [SRT_SOCKOPT_NPOST] = {
SRTO_SNDSYN,
SRTO_RCVSYN,
SRTO_LINGER,
SRTO_SNDTIMEO,
SRTO_RCVTIMEO,
SRTO_MAXBW,
SRTO_INPUTBW,
SRTO_OHEADBW,
SRTO_SNDDROPDELAY,
SRTO_DRIFTTRACER,
SRTO_MININPUTBW,
SRTO_LOSSMAXTTL
#ifdef ENABLE_MAXREXMITBW
,SRTO_MAXREXMITBW
#endif
};
const int32_t
SRTO_R_PREBIND = BIT(0), //< cannot be modified after srt_bind()
SRTO_R_PRE = BIT(1), //< cannot be modified after connection is established
SRTO_POST_SPEC = BIT(2); //< executes some action after setting the option
namespace srt
{
struct SrtOptionAction
{
int flags[SRTO_E_SIZE];
std::map<SRT_SOCKOPT, std::string> private_default;
SrtOptionAction()
{
// Set everything to 0 to clear all flags
// When an option isn't present here, it means that:
// * it is not settable, or
// * the option is POST (non-restricted)
// * it has no post-actions
// The post-action may be defined independently on restrictions.
memset(flags, 0, sizeof flags);
flags[SRTO_MSS] = SRTO_R_PREBIND;
flags[SRTO_FC] = SRTO_R_PRE;
flags[SRTO_SNDBUF] = SRTO_R_PREBIND;
flags[SRTO_RCVBUF] = SRTO_R_PREBIND;
flags[SRTO_UDP_SNDBUF] = SRTO_R_PREBIND;
flags[SRTO_UDP_RCVBUF] = SRTO_R_PREBIND;
flags[SRTO_RENDEZVOUS] = SRTO_R_PRE;
flags[SRTO_REUSEADDR] = SRTO_R_PREBIND;
flags[SRTO_MAXBW] = SRTO_POST_SPEC;
flags[SRTO_SENDER] = SRTO_R_PRE;
flags[SRTO_TSBPDMODE] = SRTO_R_PRE;
flags[SRTO_LATENCY] = SRTO_R_PRE;
flags[SRTO_INPUTBW] = SRTO_POST_SPEC;
flags[SRTO_MININPUTBW] = SRTO_POST_SPEC;
flags[SRTO_OHEADBW] = SRTO_POST_SPEC;
flags[SRTO_PASSPHRASE] = SRTO_R_PRE;
flags[SRTO_PBKEYLEN] = SRTO_R_PRE;
flags[SRTO_IPTTL] = SRTO_R_PREBIND;
flags[SRTO_IPTOS] = SRTO_R_PREBIND;
flags[SRTO_TLPKTDROP] = SRTO_R_PRE;
flags[SRTO_SNDDROPDELAY] = SRTO_POST_SPEC;
flags[SRTO_NAKREPORT] = SRTO_R_PRE;
flags[SRTO_VERSION] = SRTO_R_PRE;
flags[SRTO_CONNTIMEO] = SRTO_R_PRE;
flags[SRTO_LOSSMAXTTL] = SRTO_POST_SPEC;
flags[SRTO_RCVLATENCY] = SRTO_R_PRE;
flags[SRTO_PEERLATENCY] = SRTO_R_PRE;
flags[SRTO_MINVERSION] = SRTO_R_PRE;
flags[SRTO_STREAMID] = SRTO_R_PRE;
flags[SRTO_CONGESTION] = SRTO_R_PRE;
flags[SRTO_MESSAGEAPI] = SRTO_R_PRE;
flags[SRTO_PAYLOADSIZE] = SRTO_R_PRE;
flags[SRTO_TRANSTYPE] = SRTO_R_PREBIND;
flags[SRTO_KMREFRESHRATE] = SRTO_R_PRE;
flags[SRTO_KMPREANNOUNCE] = SRTO_R_PRE;
flags[SRTO_ENFORCEDENCRYPTION] = SRTO_R_PRE;
flags[SRTO_IPV6ONLY] = SRTO_R_PREBIND;
flags[SRTO_PEERIDLETIMEO] = SRTO_R_PRE;
#ifdef SRT_ENABLE_BINDTODEVICE
flags[SRTO_BINDTODEVICE] = SRTO_R_PREBIND;
#endif
#if ENABLE_BONDING
flags[SRTO_GROUPCONNECT] = SRTO_R_PRE;
flags[SRTO_GROUPMINSTABLETIMEO]= SRTO_R_PRE;
#endif
flags[SRTO_PACKETFILTER] = SRTO_R_PRE;
flags[SRTO_RETRANSMITALGO] = SRTO_R_PRE;
#ifdef ENABLE_AEAD_API_PREVIEW
flags[SRTO_CRYPTOMODE] = SRTO_R_PRE;
#endif
// For "private" options (not derived from the listener
// socket by an accepted socket) provide below private_default
// to which these options will be reset after blindly
// copying the option object from the listener socket.
// Note that this option cannot have runtime-dependent
// default value, like options affected by SRTO_TRANSTYPE.
// Options may be of different types, but this value should be only
// used as a source of the value. For example, in case of int64_t you'd
// have to place here a string of 8 characters. It should be copied
// always in the hardware order, as this is what will be directly
// passed to a setting function.
private_default[SRTO_STREAMID] = string();
}
};
const SrtOptionAction s_sockopt_action;
} // namespace srt
#if HAVE_CXX11
CUDTUnited& srt::CUDT::uglobal()
{
static CUDTUnited instance;
return instance;
}
#else // !HAVE_CXX11
static pthread_once_t s_UDTUnitedOnce = PTHREAD_ONCE_INIT;
static CUDTUnited *getInstance()
{
static CUDTUnited instance;
return &instance;
}
CUDTUnited& srt::CUDT::uglobal()
{
// We don't want lock each time, pthread_once can be faster than mutex.
pthread_once(&s_UDTUnitedOnce, reinterpret_cast<void (*)()>(getInstance));
return *getInstance();
}
#endif
void srt::CUDT::construct()
{
m_pSndBuffer = NULL;
m_pRcvBuffer = NULL;
m_pSndLossList = NULL;
m_pRcvLossList = NULL;
m_iReorderTolerance = 0;
// How many times so far the packet considered lost has been received
// before TTL expires.
m_iConsecEarlyDelivery = 0;
m_iConsecOrderedDelivery = 0;
m_pSndQueue = NULL;
m_pRcvQueue = NULL;
m_pSNode = NULL;
m_pRNode = NULL;
// Will be reset to 0 for HSv5, this value is important for HSv4.
m_iSndHsRetryCnt = SRT_MAX_HSRETRY + 1;
m_PeerID = 0;
m_bOpened = false;
m_bListening = false;
m_bConnecting = false;
m_bConnected = false;
m_bClosing = false;
m_bShutdown = false;
m_bBroken = false;
m_bBreakAsUnstable = false;
// TODO: m_iBrokenCounter should be still set to some default.
m_bPeerHealth = true;
m_RejectReason = SRT_REJ_UNKNOWN;
m_tsLastReqTime.store(steady_clock::time_point());
m_SrtHsSide = HSD_DRAW;
m_uPeerSrtVersion = 0; // Not defined until connected.
m_iTsbPdDelay_ms = 0;
m_iPeerTsbPdDelay_ms = 0;
m_bPeerTsbPd = false;
m_bTsbPd = false;
m_bTsbPdNeedsWakeup = false;
m_bGroupTsbPd = false;
m_bPeerTLPktDrop = false;
m_bBufferWasFull = false;
// Initilize mutex and condition variables.
initSynch();
// TODO: Uncomment when the callback is implemented.
// m_cbPacketArrival.set(this, &CUDT::defaultPacketArrival);
}
srt::CUDT::CUDT(CUDTSocket* parent)
: m_parent(parent)
#ifdef ENABLE_MAXREXMITBW
, m_SndRexmitRate(sync::steady_clock::now())
#endif
, m_iISN(-1)
, m_iPeerISN(-1)
{
construct();
(void)SRT_DEF_VERSION;
// Runtime fields
#if ENABLE_BONDING
m_HSGroupType = SRT_GTYPE_UNDEFINED;
#endif
m_bTLPktDrop = true; // Too-late Packet Drop
m_pCache = NULL;
// This is in order to set it ANY kind of initial value, however
// this value should not be used when not connected and should be
// updated in the handshake. When this value is 0, it means that
// packets shall not be sent, as the other party doesn't have a
// room to receive and store it. Therefore this value should be
// overridden before any sending happens.
m_iFlowWindowSize = 0;
}
srt::CUDT::CUDT(CUDTSocket* parent, const CUDT& ancestor)
: m_parent(parent)
#ifdef ENABLE_MAXREXMITBW
, m_SndRexmitRate(sync::steady_clock::now())
#endif
, m_iISN(-1)
, m_iPeerISN(-1)
{
construct();
// XXX Consider all below fields (except m_bReuseAddr) to be put
// into a separate class for easier copying.
m_config = ancestor.m_config;
// Reset values that shall not be derived to default ones.
// These declarations should be consistent with SRTO_R_PRIVATE flag.
for (size_t i = 0; i < Size(s_sockopt_action.flags); ++i)
{
const string* pdef = map_getp(s_sockopt_action.private_default, SRT_SOCKOPT(i));
if (pdef)
{
try
{
// Ignore errors here - this is a development-time granted
// value, not user-provided value.
m_config.set(SRT_SOCKOPT(i), pdef->data(), (int) pdef->size());
}
catch (...)
{
LOGC(gglog.Error, log << "IPE: failed to set a declared default option!");
}
}
}
m_SrtHsSide = ancestor.m_SrtHsSide; // actually it sets it to HSD_RESPONDER
m_bTLPktDrop = ancestor.m_bTLPktDrop;
m_iReorderTolerance = m_config.iMaxReorderTolerance; // Initialize with maximum value
// Runtime
m_pCache = ancestor.m_pCache;
}
srt::CUDT::~CUDT()
{
// release mutex/condtion variables
destroySynch();
// destroy the data structures
delete m_pSndBuffer;
delete m_pRcvBuffer;
delete m_pSndLossList;
delete m_pRcvLossList;
delete m_pSNode;
delete m_pRNode;
}
void srt::CUDT::setOpt(SRT_SOCKOPT optName, const void* optval, int optlen)
{
if (m_bBroken || m_bClosing)
throw CUDTException(MJ_CONNECTION, MN_CONNLOST, 0);
// Match check (confirm optName as index for s_sockopt_action)
if (int(optName) < 0 || int(optName) >= int(SRTO_E_SIZE))
throw CUDTException(MJ_NOTSUP, MN_INVAL, 0);
// Restriction check
const int oflags = s_sockopt_action.flags[optName];
ScopedLock cg (m_ConnectionLock);
ScopedLock sendguard (m_SendLock);
ScopedLock recvguard (m_RecvLock);
HLOGC(aclog.Debug,
log << CONID() << "OPTION: #" << optName << " value:" << FormatBinaryString((uint8_t*)optval, optlen));
if (IsSet(oflags, SRTO_R_PREBIND) && m_bOpened)
throw CUDTException(MJ_NOTSUP, MN_ISBOUND, 0);
if (IsSet(oflags, SRTO_R_PRE) && (m_bConnected || m_bConnecting || m_bListening))
throw CUDTException(MJ_NOTSUP, MN_ISCONNECTED, 0);
// Option execution. If this returns -1, there's no such option.
const int status = m_config.set(optName, optval, optlen);
if (status == -1)
{
LOGC(aclog.Error, log << CONID() << "OPTION: #" << optName << " UNKNOWN");
throw CUDTException(MJ_NOTSUP, MN_INVAL, 0);
}
// Post-action, if applicable
if (IsSet(oflags, SRTO_POST_SPEC) && m_bConnected)
{
switch (optName)
{
case SRTO_MAXBW:
updateCC(TEV_INIT, EventVariant(TEV_INIT_RESET));
break;
case SRTO_INPUTBW:
case SRTO_MININPUTBW:
updateCC(TEV_INIT, EventVariant(TEV_INIT_INPUTBW));
break;
case SRTO_OHEADBW:
updateCC(TEV_INIT, EventVariant(TEV_INIT_OHEADBW));
break;
case SRTO_LOSSMAXTTL:
m_iReorderTolerance = m_config.iMaxReorderTolerance;
default: break;
}
}
}
void srt::CUDT::getOpt(SRT_SOCKOPT optName, void *optval, int &optlen)
{
ScopedLock cg(m_ConnectionLock);
switch (optName)
{
case SRTO_MSS:
*(int *)optval = m_config.iMSS;
optlen = sizeof(int);
break;
case SRTO_SNDSYN:
*(bool *)optval = m_config.bSynSending;
optlen = sizeof(bool);
break;
case SRTO_RCVSYN:
*(bool *)optval = m_config.bSynRecving;
optlen = sizeof(bool);
break;
case SRTO_ISN:
*(int *)optval = m_iISN;
optlen = sizeof(int);
break;
case SRTO_FC:
*(int *)optval = m_config.iFlightFlagSize;
optlen = sizeof(int);
break;
// For SNDBUF/RCVBUF values take the variant that uses more memory.
// It is not possible to make sure what "family" is in use without
// checking if the socket is bound. This will also be the exact size
// of the memory in use.
case SRTO_SNDBUF:
*(int *)optval = m_config.iSndBufSize * m_config.bytesPerPkt();
optlen = sizeof(int);
break;
case SRTO_RCVBUF:
*(int *)optval = m_config.iRcvBufSize * m_config.bytesPerPkt();
optlen = sizeof(int);
break;
case SRTO_LINGER:
if (optlen < (int)(sizeof(linger)))
throw CUDTException(MJ_NOTSUP, MN_INVAL, 0);
*(linger *)optval = m_config.Linger;
optlen = sizeof(linger);
break;
case SRTO_UDP_SNDBUF:
*(int *)optval = m_config.iUDPSndBufSize;
optlen = sizeof(int);
break;
case SRTO_UDP_RCVBUF:
*(int *)optval = m_config.iUDPRcvBufSize;
optlen = sizeof(int);
break;
case SRTO_RENDEZVOUS:
*(bool *)optval = m_config.bRendezvous;
optlen = sizeof(bool);
break;
case SRTO_SNDTIMEO:
*(int *)optval = m_config.iSndTimeOut;
optlen = sizeof(int);
break;
case SRTO_RCVTIMEO:
*(int *)optval = m_config.iRcvTimeOut;
optlen = sizeof(int);
break;
case SRTO_REUSEADDR:
*(bool *)optval = m_config.bReuseAddr;
optlen = sizeof(bool);
break;
case SRTO_MAXBW:
if (size_t(optlen) < sizeof(m_config.llMaxBW))
throw CUDTException(MJ_NOTSUP, MN_INVAL, 0);
*(int64_t *)optval = m_config.llMaxBW;
optlen = sizeof(int64_t);
break;
case SRTO_INPUTBW:
if (size_t(optlen) < sizeof(m_config.llInputBW))
throw CUDTException(MJ_NOTSUP, MN_INVAL, 0);
*(int64_t*)optval = m_config.llInputBW;
optlen = sizeof(int64_t);
break;
case SRTO_MININPUTBW:
if (size_t(optlen) < sizeof (m_config.llMinInputBW))
throw CUDTException(MJ_NOTSUP, MN_INVAL, 0);
*(int64_t*)optval = m_config.llMinInputBW;
optlen = sizeof(int64_t);
break;
case SRTO_OHEADBW:
*(int32_t *)optval = m_config.iOverheadBW;
optlen = sizeof(int32_t);
break;
#ifdef ENABLE_MAXREXMITBW
case SRTO_MAXREXMITBW:
if (size_t(optlen) < sizeof(m_config.llMaxRexmitBW))
throw CUDTException(MJ_NOTSUP, MN_INVAL, 0);
*(int64_t*)optval = m_config.llMaxRexmitBW;
optlen = sizeof(int64_t);
break;
#endif
case SRTO_STATE:
*(int32_t *)optval = uglobal().getStatus(m_SocketID);
optlen = sizeof(int32_t);
break;
case SRTO_EVENT:
{
int32_t event = 0;
if (m_bBroken)
event |= SRT_EPOLL_ERR;
else
{
enterCS(m_RecvLock);
if (m_pRcvBuffer && isRcvBufferReady())
event |= SRT_EPOLL_IN;
leaveCS(m_RecvLock);
if (m_pSndBuffer && (m_config.iSndBufSize > m_pSndBuffer->getCurrBufSize()))
event |= SRT_EPOLL_OUT;
}
*(int32_t *)optval = event;
optlen = sizeof(int32_t);
break;
}
case SRTO_SNDDATA:
if (m_pSndBuffer)
*(int32_t *)optval = m_pSndBuffer->getCurrBufSize();
else
*(int32_t *)optval = 0;
optlen = sizeof(int32_t);
break;
case SRTO_RCVDATA:
if (m_pRcvBuffer)
{
enterCS(m_RecvLock);
*(int32_t *)optval = m_pRcvBuffer->getRcvDataSize();
leaveCS(m_RecvLock);
}
else
*(int32_t *)optval = 0;
optlen = sizeof(int32_t);
break;
case SRTO_IPTTL:
if (m_bOpened)
*(int32_t *)optval = m_pSndQueue->getIpTTL();
else
*(int32_t *)optval = m_config.iIpTTL;
optlen = sizeof(int32_t);
break;
case SRTO_IPTOS:
if (m_bOpened)
*(int32_t *)optval = m_pSndQueue->getIpToS();
else
*(int32_t *)optval = m_config.iIpToS;
optlen = sizeof(int32_t);
break;
case SRTO_BINDTODEVICE:
#ifdef SRT_ENABLE_BINDTODEVICE
if (optlen < IFNAMSIZ)
throw CUDTException(MJ_NOTSUP, MN_INVAL, 0);
if (m_bOpened && m_pSndQueue->getBind(((char*)optval), optlen))
{
optlen = strlen((char*)optval);
break;
}
// Fallback: return from internal data
optlen = (int)m_config.sBindToDevice.copy((char*)optval, (size_t)optlen - 1);
((char*)optval)[optlen] = '\0';
#else
LOGC(smlog.Error, log << "SRTO_BINDTODEVICE is not supported on that platform");
throw CUDTException(MJ_NOTSUP, MN_INVAL, 0);
#endif
break;
case SRTO_SENDER:
*(bool *)optval = m_config.bDataSender;
optlen = sizeof(bool);
break;
case SRTO_TSBPDMODE:
*(bool *)optval = m_config.bTSBPD;
optlen = sizeof(bool);
break;
case SRTO_LATENCY:
case SRTO_RCVLATENCY:
if (m_bConnected)
*(int32_t *)optval = m_iTsbPdDelay_ms;
else
*(int32_t *)optval = m_config.iRcvLatency;
optlen = sizeof(int32_t);
break;
case SRTO_PEERLATENCY:
if (m_bConnected)
*(int32_t *)optval = m_iPeerTsbPdDelay_ms;
else
*(int32_t *)optval = m_config.iPeerLatency;
optlen = sizeof(int32_t);
break;
case SRTO_TLPKTDROP:
if (m_bConnected)
*(bool *)optval = m_bTLPktDrop;
else
*(bool *)optval = m_config.bTLPktDrop;
optlen = sizeof(bool);
break;
case SRTO_SNDDROPDELAY:
*(int32_t *)optval = m_config.iSndDropDelay;
optlen = sizeof(int32_t);
break;
case SRTO_PBKEYLEN:
if (m_pCryptoControl)
*(int32_t *)optval = (int32_t) m_pCryptoControl->KeyLen(); // Running Key length.
else
*(int32_t *)optval = m_config.iSndCryptoKeyLen; // May be 0.
optlen = sizeof(int32_t);
break;
case SRTO_KMSTATE:
if (!m_pCryptoControl)
*(int32_t *)optval = SRT_KM_S_UNSECURED;
else if (m_config.bDataSender)
*(int32_t *)optval = m_pCryptoControl->m_SndKmState;
else
*(int32_t *)optval = m_pCryptoControl->m_RcvKmState;
optlen = sizeof(int32_t);
break;
case SRTO_SNDKMSTATE: // State imposed by Agent depending on PW and KMX
if (m_pCryptoControl)
*(int32_t *)optval = m_pCryptoControl->m_SndKmState;
else
*(int32_t *)optval = SRT_KM_S_UNSECURED;
optlen = sizeof(int32_t);
break;
case SRTO_RCVKMSTATE: // State returned by Peer as informed during KMX
if (m_pCryptoControl)
*(int32_t *)optval = m_pCryptoControl->m_RcvKmState;
else
*(int32_t *)optval = SRT_KM_S_UNSECURED;
optlen = sizeof(int32_t);
break;
case SRTO_LOSSMAXTTL:
*(int32_t*)optval = m_config.iMaxReorderTolerance;
optlen = sizeof(int32_t);
break;
case SRTO_NAKREPORT:
*(bool *)optval = m_config.bRcvNakReport;
optlen = sizeof(bool);
break;
case SRTO_VERSION:
*(int32_t *)optval = m_config.uSrtVersion;
optlen = sizeof(int32_t);
break;
case SRTO_PEERVERSION:
*(int32_t *)optval = m_uPeerSrtVersion;
optlen = sizeof(int32_t);
break;
case SRTO_CONNTIMEO:
*(int*)optval = (int) count_milliseconds(m_config.tdConnTimeOut);
optlen = sizeof(int);
break;
case SRTO_DRIFTTRACER:
*(bool*)optval = m_config.bDriftTracer;
optlen = sizeof(bool);
break;
case SRTO_MINVERSION:
*(uint32_t *)optval = m_config.uMinimumPeerSrtVersion;
optlen = sizeof(uint32_t);
break;
case SRTO_STREAMID:
if (size_t(optlen) < m_config.sStreamName.size() + 1)
throw CUDTException(MJ_NOTSUP, MN_INVAL, 0);
optlen = (int)m_config.sStreamName.copy((char*)optval, (size_t)optlen - 1);
((char*)optval)[optlen] = '\0';
break;
case SRTO_CONGESTION:
if (size_t(optlen) < m_config.sCongestion.size() + 1)
throw CUDTException(MJ_NOTSUP, MN_INVAL, 0);
optlen = (int)m_config.sCongestion.copy((char*)optval, (size_t)optlen - 1);
((char*)optval)[optlen] = '\0';
break;
case SRTO_MESSAGEAPI:
optlen = sizeof(bool);
*(bool *)optval = m_config.bMessageAPI;
break;
case SRTO_PAYLOADSIZE:
optlen = sizeof(int);
*(int *)optval = (int) payloadSize();
break;
case SRTO_KMREFRESHRATE:
optlen = sizeof(int);
*(int*)optval = (int)m_config.uKmRefreshRatePkt;
break;
case SRTO_KMPREANNOUNCE:
optlen = sizeof(int);
*(int*)optval = (int)m_config.uKmPreAnnouncePkt;
break;
#if ENABLE_BONDING
case SRTO_GROUPCONNECT:
optlen = sizeof (int);
*(int*)optval = m_config.iGroupConnect;
break;
case SRTO_GROUPMINSTABLETIMEO:
optlen = sizeof(int);
*(int*)optval = (int)m_config.uMinStabilityTimeout_ms;
break;
case SRTO_GROUPTYPE:
optlen = sizeof (int);
*(int*)optval = m_HSGroupType;
break;
#endif
case SRTO_ENFORCEDENCRYPTION:
optlen = sizeof(bool);
*(bool *)optval = m_config.bEnforcedEnc;
break;
case SRTO_IPV6ONLY:
optlen = sizeof(int);
*(int *)optval = m_config.iIpV6Only;
break;
case SRTO_PEERIDLETIMEO:
*(int *)optval = m_config.iPeerIdleTimeout_ms;
optlen = sizeof(int);
break;
case SRTO_PACKETFILTER:
if (size_t(optlen) < m_config.sPacketFilterConfig.size() + 1)
throw CUDTException(MJ_NOTSUP, MN_INVAL, 0);
optlen = (int)m_config.sPacketFilterConfig.copy((char*)optval, (size_t)optlen - 1);
((char*)optval)[optlen] = '\0';
break;
case SRTO_RETRANSMITALGO:
*(int32_t *)optval = m_config.iRetransmitAlgo;
optlen = sizeof(int32_t);
break;
#ifdef ENABLE_AEAD_API_PREVIEW
case SRTO_CRYPTOMODE:
if (m_pCryptoControl)
*(int32_t*)optval = m_pCryptoControl->getCryptoMode();
else
*(int32_t*)optval = m_config.iCryptoMode;
optlen = sizeof(int32_t);
break;
#endif
default:
throw CUDTException(MJ_NOTSUP, MN_NONE, 0);
}
}
#if ENABLE_BONDING
SRT_ERRNO srt::CUDT::applyMemberConfigObject(const SRT_SocketOptionObject& opt)
{
SRT_SOCKOPT this_opt = SRTO_VERSION;
for (size_t i = 0; i < opt.options.size(); ++i)
{
SRT_SocketOptionObject::SingleOption* o = opt.options[i];
HLOGC(smlog.Debug, log << CONID() << "applyMemberConfigObject: OPTION @" << m_SocketID << " #" << o->option);
this_opt = SRT_SOCKOPT(o->option);
setOpt(this_opt, o->storage, o->length);
}
return SRT_SUCCESS;
}
#endif
bool srt::CUDT::setstreamid(SRTSOCKET u, const std::string &sid)
{
CUDT *that = getUDTHandle(u);
if (!that)
return false;
if (sid.size() > CSrtConfig::MAX_SID_LENGTH)
return false;
if (that->m_bConnected)
return false;
that->m_config.sStreamName.set(sid);
return true;
}
string srt::CUDT::getstreamid(SRTSOCKET u)
{
CUDT *that = getUDTHandle(u);
if (!that)
return "";
return that->m_config.sStreamName.str();
}
// XXX REFACTOR: Make common code for CUDT constructor and clearData,
// possibly using CUDT::construct.
// Initial sequence number, loss, acknowledgement, etc.
void srt::CUDT::clearData()
{
const size_t full_hdr_size = CPacket::UDP_HDR_SIZE - CPacket::HDR_SIZE;
m_iMaxSRTPayloadSize = m_config.iMSS - full_hdr_size;
HLOGC(cnlog.Debug, log << CONID() << "clearData: PAYLOAD SIZE: " << m_iMaxSRTPayloadSize);
m_SndTimeWindow.initialize(full_hdr_size, m_iMaxSRTPayloadSize);
m_RcvTimeWindow.initialize(full_hdr_size, m_iMaxSRTPayloadSize);
m_iEXPCount = 1;
m_iBandwidth = 1; // pkts/sec
// XXX use some constant for this 16
m_iDeliveryRate = 16;
m_iByteDeliveryRate = 16 * m_iMaxSRTPayloadSize;
m_iAckSeqNo = 0;
m_tsLastAckTime = steady_clock::now();
// trace information
{
ScopedLock stat_lock(m_StatsLock);
m_stats.tsStartTime = steady_clock::now();
m_stats.sndr.reset();
m_stats.rcvr.reset();
m_stats.tsLastSampleTime = steady_clock::now();
m_stats.traceReorderDistance = 0;
m_stats.traceBelatedTime = 0;
m_stats.sndDuration = m_stats.m_sndDurationTotal = 0;
}
// Resetting these data because this happens when agent isn't connected.
m_bPeerTsbPd = false;
m_iPeerTsbPdDelay_ms = 0;
// TSBPD as state should be set to FALSE here.
// Only when the HSREQ handshake is exchanged,
// should they be set to possibly true.
m_bTsbPd = false;
m_bGroupTsbPd = false;
m_iTsbPdDelay_ms = m_config.iRcvLatency;
m_bTLPktDrop = m_config.bTLPktDrop;
m_bPeerTLPktDrop = false;
m_bPeerNakReport = false;
m_bPeerRexmitFlag = false;
m_RdvState = CHandShake::RDV_INVALID;
m_tsRcvPeerStartTime = steady_clock::time_point();
}
void srt::CUDT::open()
{
ScopedLock cg(m_ConnectionLock);
clearData();
// structures for queue
if (m_pSNode == NULL)
m_pSNode = new CSNode;
m_pSNode->m_pUDT = this;
m_pSNode->m_tsTimeStamp = steady_clock::now();
m_pSNode->m_iHeapLoc = -1;
if (m_pRNode == NULL)
m_pRNode = new CRNode;
m_pRNode->m_pUDT = this;
m_pRNode->m_tsTimeStamp = steady_clock::now();
m_pRNode->m_pPrev = m_pRNode->m_pNext = NULL;
m_pRNode->m_bOnList = false;
// Set initial values of smoothed RTT and RTT variance.
m_iSRTT = INITIAL_RTT;
m_iRTTVar = INITIAL_RTTVAR;
m_bIsFirstRTTReceived = false;
// set minimum NAK and EXP timeout to 300ms
m_tdMinNakInterval = milliseconds_from(300);
m_tdMinExpInterval = milliseconds_from(300);
m_tdACKInterval = microseconds_from(COMM_SYN_INTERVAL_US);
m_tdNAKInterval = m_tdMinNakInterval;
const steady_clock::time_point currtime = steady_clock::now();
m_tsLastRspTime.store(currtime);
m_tsNextACKTime.store(currtime + m_tdACKInterval);
m_tsNextNAKTime.store(currtime + m_tdNAKInterval);
m_tsLastRspAckTime = currtime;
m_tsLastSndTime.store(currtime);
#if ENABLE_BONDING
m_tsUnstableSince = steady_clock::time_point();
m_tsFreshActivation = steady_clock::time_point();
m_tsWarySince = steady_clock::time_point();
#endif