[TCP]: Fix init_cwnd calculations in tcp_select_initial_window()
Match it up to what RFC2414 really specifies.
Noticed by Rick Jones.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index d6e3d26..caf2e2c 100644
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -190,15 +190,16 @@
}
/* Set initial window to value enough for senders,
- * following RFC1414. Senders, not following this RFC,
+ * following RFC2414. Senders, not following this RFC,
* will be satisfied with 2.
*/
if (mss > (1<<*rcv_wscale)) {
- int init_cwnd = 4;
- if (mss > 1460*3)
+ int init_cwnd;
+
+ if (mss > 1460)
init_cwnd = 2;
- else if (mss > 1460)
- init_cwnd = 3;
+ else
+ init_cwnd = (mss > 1095) ? 3 : 4;
if (*rcv_wnd > init_cwnd*mss)
*rcv_wnd = init_cwnd*mss;
}