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takes IP and TCP headers into account for rate limits as well

This commit is contained in:
Arvid Norberg 2008-05-06 16:15:31 +00:00
parent e09457e4ab
commit f7ef315438
1 changed files with 15 additions and 10 deletions
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25
include/libtorrent/stat.hpp
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@ -143,16 +143,21 @@ namespace libtorrent
// calculate ip protocol overhead
void calc_ip_overhead()
{
// traffic balance is the number of bytes we downloaded
// more than we uploaded
int traffic_balance = m_stat[download_protocol].counter()
+ m_stat[download_payload].counter()
- m_stat[upload_protocol].counter()
- m_stat[upload_payload].counter();
if (traffic_balance > 0)
m_stat[upload_ip_protocol].add(traffic_balance / 20);
else
m_stat[download_ip_protocol].add(-traffic_balance / 20);
int uploaded = m_stat[upload_protocol].counter()
+ m_stat[upload_payload].counter();
int downloaded = m_stat[download_protocol].counter()
+ m_stat[download_payload].counter();
// IP + TCP headers are 40 bytes per MTU (1460)
// bytes of payload, but at least 40 bytes
m_stat[upload_ip_protocol].add((std::max)(uploaded / 1460, 40));
m_stat[download_ip_protocol].add((std::max)(downloaded / 1460, 40));
// also account for ACK traffic. That adds to the transfers
// in the opposite direction. Even on connections with symmetric
// transfer rates, it seems to add a penalty.
m_stat[upload_ip_protocol].add((std::max)(downloaded / 20, 40));
m_stat[download_ip_protocol].add((std::max)(uploaded / 20, 40));
}
int upload_ip_overhead() const { return m_stat[upload_ip_protocol].counter(); }