Peerplays_Blockchain/peerplays-fc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

fix NTP flooding issue

Browse source
This commit is contained in:
Daniel Larimer 2014-06-16 14:04:36 -04:00
parent 6898484321
commit bb3c3ec118
1 changed files with 9 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
src/network/ntp.cpp
View file

@ -18,6 +18,7 @@ namespace fc
public: public:
ntp_impl() :_request_interval_sec( 60*60 /* 1 hr */) ntp_impl() :_request_interval_sec( 60*60 /* 1 hr */)
{ {
_next_request_time = fc::time_point::now();
_ntp_hosts.push_back( std::make_pair( "pool.ntp.org",123 ) ); _ntp_hosts.push_back( std::make_pair( "pool.ntp.org",123 ) );
} }
@ -43,6 +44,7 @@ namespace fc
ilog( "sending request to ${ep}", ("ep",ep) ); ilog( "sending request to ${ep}", ("ep",ep) );
std::array<unsigned char, 48> send_buf { {010,0,0,0,0,0,0,0,0} }; std::array<unsigned char, 48> send_buf { {010,0,0,0,0,0,0,0,0} };
_sock.send_to( (const char*)send_buf.data(), send_buf.size(), ep ); _sock.send_to( (const char*)send_buf.data(), send_buf.size(), ep );
break;
} }
} }
// this could fail to resolve but we want to go on to other hosts.. // this could fail to resolve but we want to go on to other hosts..
@ -82,8 +84,14 @@ namespace fc
uint32_t seconds_since_epoch = seconds_since_1900 - 2208988800; uint32_t seconds_since_epoch = seconds_since_1900 - 2208988800;
auto ntp_time = (fc::time_point() + fc::seconds(seconds_since_epoch) + fc::microseconds(microseconds)); auto ntp_time = (fc::time_point() + fc::seconds(seconds_since_epoch) + fc::microseconds(microseconds));
if( ntp_time - fc::time_point::now() < fc::seconds(60*60*24) &&
fc::time_point::now() - ntp_time < fc::seconds(60*60*24) )
{
_last_ntp_delta = ntp_time - fc::time_point::now(); _last_ntp_delta = ntp_time - fc::time_point::now();
} }
else
elog( "NTP time is way off ${time}", ("time",ntp_time)("local",fc::time_point::now()) );
}
} // read_loop } // read_loop
}; };