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feat: Delay M-SEARCH response by a random value according to MX header (#844)

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This commit is contained in:
Murat Seker
2020-06-28 23:19:06 +02:00
committed by GitHub
parent 458113f8f9
commit db8b872217
3 changed files with 36 additions and 32 deletions
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27
libsrc/ssdp/SSDPHandler.cpp
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@@ -150,13 +150,28 @@ const QString SSDPHandler::getLocalAddress()
void SSDPHandler::handleMSearchRequest(const QString& target, const QString& mx, const QString address, const quint16 & port)
{
// TODO Response delay according to MX field (sec) random between 0 and MX
const auto respond = [=] () {
// when searched for all devices / root devices / basic device
if(target == "ssdp:all")
sendMSearchResponse(SSDP_HYPERION_ST, address, port);
else if(target == "upnp:rootdevice" || target == "urn:schemas-upnp-org:device:basic:1" || target == SSDP_HYPERION_ST)
sendMSearchResponse(target, address, port);
};
// when searched for all devices / root devices / basic device
if(target == "ssdp:all")
sendMSearchResponse(SSDP_HYPERION_ST, address, port);
else if(target == "upnp:rootdevice" || target == "urn:schemas-upnp-org:device:basic:1" || target == SSDP_HYPERION_ST)
sendMSearchResponse(target, address, port);
bool ok = false;
int maxDelay = mx.toInt(&ok);
if (ok)
{
/* Pick a random delay between 0 and MX seconds */
int randomDelay = qrand() % (maxDelay * 1000);
QTimer::singleShot(randomDelay, respond);
}
else
{
/* MX Header is not valid.
* Send response without delay */
respond();
}
}
const QString SSDPHandler::getDescAddress()