All of snd_wnd, snd_cwnd and snd_ssthresh in stuct tcpcb are u_long,
so use u_long and ulmin() instead of u_int and uimin(). Found by lgtm bot. XXX TCP's sequence number is uint32_t, so it might be good to change some entries in struct tcpcb to uint32_t instead of u_long. FreeBSD did it.
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@ -1,4 +1,4 @@
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/* $NetBSD: tcp_congctl.c,v 1.26 2018/09/03 16:29:36 riastradh Exp $ */
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/* $NetBSD: tcp_congctl.c,v 1.27 2019/10/09 05:29:18 msaitoh Exp $ */
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/*-
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* Copyright (c) 1997, 1998, 1999, 2001, 2005, 2006 The NetBSD Foundation, Inc.
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@ -135,7 +135,7 @@
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*/
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#include <sys/cdefs.h>
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__KERNEL_RCSID(0, "$NetBSD: tcp_congctl.c,v 1.26 2018/09/03 16:29:36 riastradh Exp $");
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__KERNEL_RCSID(0, "$NetBSD: tcp_congctl.c,v 1.27 2019/10/09 05:29:18 msaitoh Exp $");
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#ifdef _KERNEL_OPT
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#include "opt_inet.h"
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@ -427,12 +427,12 @@ tcp_congctl_fillnames(void)
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static void
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tcp_common_congestion_exp(struct tcpcb *tp, int betaa, int betab)
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{
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u_int win;
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u_long win;
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/*
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* Reduce the congestion window and the slow start threshold.
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*/
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win = uimin(tp->snd_wnd, tp->snd_cwnd) * betaa / betab / tp->t_segsz;
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win = ulmin(tp->snd_wnd, tp->snd_cwnd) * betaa / betab / tp->t_segsz;
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if (win < 2)
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win = 2;
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@ -519,7 +519,7 @@ tcp_reno_fast_retransmit(struct tcpcb *tp, const struct tcphdr *th)
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static void
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tcp_reno_slow_retransmit(struct tcpcb *tp)
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{
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u_int win;
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u_long win;
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/*
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* Close the congestion window down to one segment
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@ -546,7 +546,7 @@ tcp_reno_slow_retransmit(struct tcpcb *tp)
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* to go below this.)
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*/
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win = uimin(tp->snd_wnd, tp->snd_cwnd) / 2 / tp->t_segsz;
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win = ulmin(tp->snd_wnd, tp->snd_cwnd) / 2 / tp->t_segsz;
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if (win < 2)
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win = 2;
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/* Loss Window MUST be one segment. */
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