tcp: update also tcp_output with regard to RFC 5681

Thanks to Ilpo Jarvinen, this updates also the initial window
setting for tcp_output with regard to RFC 5681.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 3 insertions, 9 deletions

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 01b94b8d9ec9..ea09d2fd50c7 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -224,16 +224,10 @@ void tcp_select_initial_window(int __space, __u32 mss,
                 }
         }
 
-        /* Set initial window to value enough for senders,
-         * following RFC2414. Senders, not following this RFC,
-         * will be satisfied with 2.
-         */
+        /* Set initial window to value enough for senders, following RFC5681. */
         if (mss > (1 << *rcv_wscale)) {
-                int init_cwnd = 4;
-                if (mss > 1460 * 3)
-                        init_cwnd = 2;
-                else if (mss > 1460)
-                        init_cwnd = 3;
+                int init_cwnd = rfc3390_bytes_to_packets(mss);
+
                 /* when initializing use the value from init_rcv_wnd
                  * rather than the default from above
                  */