From f5fd80039fb95242ad8d5796bdf2f52190a058b4 Mon Sep 17 00:00:00 2001 From: laurent chavey Date: Tue, 15 Dec 2009 13:05:15 +0000 Subject: [PATCH] Add initrwnd to iproute2 Add initrwnd option parsing to iproute. This option uses the new rtnetlink init_rcvwnd to set the TCP initial receive window size advertised by passive and active TCP connections. Signed-off-by: Laurent Chavey --- doc/ip-cref.tex | 7 +++++++ ip/iproute.c | 13 ++++++++++++- 2 files changed, 19 insertions(+), 1 deletion(-) diff --git a/doc/ip-cref.tex b/doc/ip-cref.tex index 7bb562e1..056e3bf5 100644 --- a/doc/ip-cref.tex +++ b/doc/ip-cref.tex @@ -1336,6 +1336,13 @@ peers are allowed to send to us. MSS (``Maximal Segment Size'') for same connection. The default is zero, meaning to use the values specified in~\cite{RFC2414}. ++\item \verb|initrwnd NUMBER| + ++--- [2.6.33+ only] Initial receive window size for connections to ++ this destination. The actual window size is this value multiplied ++ by the MSS (''Maximal Segment Size'') of the connection. The default ++ value is zero, meaning to use Slow Start value. + \item \verb|nexthop NEXTHOP| --- the nexthop of a multipath route. \verb|NEXTHOP| is a complex value diff --git a/ip/iproute.c b/ip/iproute.c index 1d73ab87..8252e182 100644 --- a/ip/iproute.c +++ b/ip/iproute.c @@ -46,6 +46,7 @@ static const char *mx_names[RTAX_MAX+1] = { [RTAX_INITCWND] = "initcwnd", [RTAX_FEATURES] = "features", [RTAX_RTO_MIN] = "rto_min", + [RTAX_INITRWND] = "initrwnd", }; static void usage(void) __attribute__((noreturn)); @@ -68,7 +69,7 @@ static void usage(void) fprintf(stderr, " [ rtt TIME ] [ rttvar TIME ] [reordering NUMBER ]\n"); fprintf(stderr, " [ window NUMBER] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n"); fprintf(stderr, " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n"); - fprintf(stderr, " [ rto_min TIME ] [ hoplimit NUMBER ] \n"); + fprintf(stderr, " [ rto_min TIME ] [ hoplimit NUMBER ] [ initrwnd NUMBER ]\n"); fprintf(stderr, "TYPE := [ unicast | local | broadcast | multicast | throw |\n"); fprintf(stderr, " unreachable | prohibit | blackhole | nat ]\n"); fprintf(stderr, "TABLE_ID := [ local | main | default | all | NUMBER ]\n"); @@ -844,6 +845,16 @@ int iproute_modify(int cmd, unsigned flags, int argc, char **argv) if (get_unsigned(&win, *argv, 0)) invarg("\"initcwnd\" value is invalid\n", *argv); rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITCWND, win); + } else if (matches(*argv, "initrwnd") == 0) { + unsigned win; + NEXT_ARG(); + if (strcmp(*argv, "lock") == 0) { + mxlock |= (1<