Commit b1afde60 authored Dec 03, 2010 by Nandita Dukkipati Committed by David S. Miller Dec 08, 2010

tcp: Bug fix in initialization of receive window.



The bug has to do with boundary checks on the initial receive window.
If the initial receive window falls between init_cwnd and the
receive window specified by the user, the initial window is incorrectly
brought down to init_cwnd. The correct behavior is to allow it to
remain unchanged.

Signed-off-by: Nandita Dukkipati <nanditad@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

parent ce9aeb58

net/ipv4/tcp_output.c

+4 −5

Original line number	Diff line number	Diff line
		@@ -231,11 +231,10 @@ void tcp_select_initial_window(int __space, __u32 mss,
		/* when initializing use the value from init_rcv_wnd
		* rather than the default from above
		*/
		if (init_rcv_wnd &&
		(rcv_wnd > init_rcv_wnd mss))
		rcv_wnd = init_rcv_wnd mss;
		else if (rcv_wnd > init_cwnd mss)
		rcv_wnd = init_cwnd mss;
		if (init_rcv_wnd)
		rcv_wnd = min(rcv_wnd, init_rcv_wnd * mss);
		else
		rcv_wnd = min(rcv_wnd, init_cwnd * mss);
		}

		/* Set the clamp no higher than max representable value */