@@ -1324,7 +1324,12 @@ peers are allowed to send to us.
If it is not given, Linux uses the value selected with \verb|sysctl|
variable \verb|net/ipv4/tcp_reordering|.
+\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|
@@ -371,6 +371,8 @@ enum
#define RTAX_FEATURES RTAX_FEATURES
RTAX_RTO_MIN,
#define RTAX_RTO_MIN RTAX_RTO_MIN
+ RTAX_INITRWND,
+#define RTAX_INITRWND RTAX_INITRWND
__RTAX_MAX
};
@@ -51,6 +51,7 @@ 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));
@@ -73,7 +74,7 @@ static void usage(void)
fprintf(stderr, " [ rtt TIME ] [ rttvar TIME ]\n");
fprintf(stderr, " [ window NUMBER] [ cwnd NUMBER ] [ initcwnd NUMBER ]\n");
fprintf(stderr, " [ ssthresh NUMBER ] [ realms REALM ] [ src ADDRESS ]\n");
- fprintf(stderr, " [ rto_min TIME ]\n");
+ fprintf(stderr, " [ rto_min TIME ] [ 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");
@@ -842,6 +843,16 @@ 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<<RTAX_INITRWND);
+ NEXT_ARG();
+ }
+ if (get_unsigned(&win, *argv, 0))
+ invarg("\"initrwnd\" value is invalid\n", *argv);
+ rta_addattr32(mxrta, sizeof(mxbuf), RTAX_INITRWND, win);
} else if (matches(*argv, "rttvar") == 0) {
unsigned win;
NEXT_ARG();
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 <chavey@google.com> -- doc/ip-cref.tex | 5 +++++ include/linux/rtnetlink.h | 2 ++ ip/iproute.c | 13 ++++++++++++- 3 files changed, 19 insertions(+), 1 deletions(-) -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html