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Set a RateCap that is 75% of absolute bandwidth limit. This reduced rate is required because

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of the overhead associated with TCP and Relay connections:
 * The Internal rate is calculated based on transmitted data (a reliable stream).
 * The Relay rate is calculated at UDP packet level and is x1.1 - x1.2 higher than internal rate.
The Relay will drop the connection if peers exceed specified level - so best to leave some head room.



git-svn-id: http://svn.code.sf.net/p/retroshare/code/branches/v0.5-dhtmods@4773 b45a01b8-16f6-495d-af2f-9b41ad6348cc
This commit is contained in:
drbob 2012-01-10 19:40:35 +00:00
parent 8267739b02
commit 3d4feaaaf7
1 changed files with 12 additions and 1 deletions
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13
libretroshare/src/pqi/pqissludp.cc
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@ -251,7 +251,18 @@ int pqissludp::Initiate_Connection()
std::cerr << remote_addr << ")" << std::endl;
tou_connect_via_relay(sockfd, &(mConnectSrcAddr), &(mConnectProxyAddr), &(remote_addr));
parent()->setRateCap( mConnectBandwidth / 1000.0, mConnectBandwidth / 1000.0); // Set RateCap.
/*** It seems that the UDP Layer sees x 1.2 the traffic of the SSL layer.
* We need to compensate somewhere... we drop the maximum traffic to 75% of limit
* to allow for extra lost packets etc.
* NB: If we have a lossy UDP transmission - re-transmission could cause excessive data to
* exceed the limit... This is difficult to account for without hacking the TcpOnUdp layer.
* If it is noticed as a problem - we'll deal with it then
*/
#define UDP_RELAY_TRANSPORT_OVERHEAD_FACTOR (0.7)
parent()->setRateCap( UDP_RELAY_TRANSPORT_OVERHEAD_FACTOR * mConnectBandwidth / 1000.0,
UDP_RELAY_TRANSPORT_OVERHEAD_FACTOR * mConnectBandwidth / 1000.0); // Set RateCap.
}
if (0 != err)