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Send "corrected" timestamps to better calculate RTT

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This commit is contained in:
Keith Winstein
2011-10-30 03:19:32 -04:00
parent ae40f3b256
commit 90b4931c84
2 changed files with 6 additions and 4 deletions
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network.cpp
+5 -3
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@@ -54,9 +54,11 @@ Packet Connection::new_packet( string &s_payload )
{ {
uint16_t outgoing_timestamp_reply = -1; uint16_t outgoing_timestamp_reply = -1;
if ( timestamp() - saved_timestamp_received_at < 25 ) { uint64_t now = timestamp();
/* we have a recent received timestamp */
outgoing_timestamp_reply = saved_timestamp; if ( now - saved_timestamp_received_at < 1000 ) { /* we have a recent received timestamp */
/* send "corrected" timestamp advanced by how long we held it */
outgoing_timestamp_reply = saved_timestamp + (now - saved_timestamp_received_at);
saved_timestamp = -1; saved_timestamp = -1;
saved_timestamp_received_at = 0; saved_timestamp_received_at = 0;
} }
transportsender.cpp
+1 -1
View File
@@ -28,7 +28,7 @@ TransportSender<MyState>::TransportSender( Connection *s_connection, MyState &in
template <class MyState> template <class MyState>
unsigned int TransportSender<MyState>::send_interval( void ) unsigned int TransportSender<MyState>::send_interval( void )
{ {
int SEND_INTERVAL = lrint( ceil( (connection->get_SRTT() - ACK_DELAY) / 2.0 ) ); int SEND_INTERVAL = lrint( ceil( connection->get_SRTT() / 2.0 ) );
if ( SEND_INTERVAL < SEND_INTERVAL_MIN ) { if ( SEND_INTERVAL < SEND_INTERVAL_MIN ) {
SEND_INTERVAL = SEND_INTERVAL_MIN; SEND_INTERVAL = SEND_INTERVAL_MIN;
} else if ( SEND_INTERVAL > SEND_INTERVAL_MAX ) { } else if ( SEND_INTERVAL > SEND_INTERVAL_MAX ) {