Add support for RFC 3390, which allows for a variable-sized
initial congestion window.
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parent
6ec62361c8
commit
da3a8a1a4f
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=112171
@ -129,6 +129,11 @@ static int tcp_do_rfc3042 = 0;
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SYSCTL_INT(_net_inet_tcp, OID_AUTO, rfc3042, CTLFLAG_RW,
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&tcp_do_rfc3042, 0, "Enable RFC 3042 (Limited Transmit)");
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static int tcp_do_rfc3390 = 0;
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SYSCTL_INT(_net_inet_tcp, OID_AUTO, rfc3390, CTLFLAG_RW,
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&tcp_do_rfc3390, 0,
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"Enable RFC 3390 (Increasing TCP's Initial Congestion Window)");
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struct inpcbhead tcb;
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#define tcb6 tcb /* for KAME src sync over BSD*'s */
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struct inpcbinfo tcbinfo;
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@ -2745,10 +2750,12 @@ tcp_mss(tp, offer)
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* Set the slow-start flight size depending on whether this
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* is a local network or not.
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*/
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if ((isipv6 && in6_localaddr(&inp->in6p_faddr)) ||
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if (tcp_do_rfc3390)
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tp->snd_cwnd = min(4 * mss, max(2 * mss, 4380));
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else if ((isipv6 && in6_localaddr(&inp->in6p_faddr)) ||
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(!isipv6 && in_localaddr(inp->inp_faddr)))
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tp->snd_cwnd = mss * ss_fltsz_local;
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else
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else
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tp->snd_cwnd = mss * ss_fltsz;
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if (rt->rt_rmx.rmx_ssthresh) {
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@ -129,6 +129,11 @@ static int tcp_do_rfc3042 = 0;
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SYSCTL_INT(_net_inet_tcp, OID_AUTO, rfc3042, CTLFLAG_RW,
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&tcp_do_rfc3042, 0, "Enable RFC 3042 (Limited Transmit)");
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static int tcp_do_rfc3390 = 0;
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SYSCTL_INT(_net_inet_tcp, OID_AUTO, rfc3390, CTLFLAG_RW,
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&tcp_do_rfc3390, 0,
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"Enable RFC 3390 (Increasing TCP's Initial Congestion Window)");
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struct inpcbhead tcb;
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#define tcb6 tcb /* for KAME src sync over BSD*'s */
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struct inpcbinfo tcbinfo;
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@ -2745,10 +2750,12 @@ tcp_mss(tp, offer)
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* Set the slow-start flight size depending on whether this
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* is a local network or not.
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*/
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if ((isipv6 && in6_localaddr(&inp->in6p_faddr)) ||
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if (tcp_do_rfc3390)
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tp->snd_cwnd = min(4 * mss, max(2 * mss, 4380));
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else if ((isipv6 && in6_localaddr(&inp->in6p_faddr)) ||
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(!isipv6 && in_localaddr(inp->inp_faddr)))
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tp->snd_cwnd = mss * ss_fltsz_local;
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else
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else
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tp->snd_cwnd = mss * ss_fltsz;
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if (rt->rt_rmx.rmx_ssthresh) {
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