Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
[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>
+6
-5
net/ipv4/tcp_output.c
+6
-5
net/ipv4/tcp_output.c
···
190
}
191
192
/* Set initial window to value enough for senders,
193
-
* following RFC1414. Senders, not following this RFC,
194
* will be satisfied with 2.
195
*/
196
if (mss > (1<<*rcv_wscale)) {
197
-
int init_cwnd = 4;
198
-
if (mss > 1460*3)
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init_cwnd = 2;
200
-
else if (mss > 1460)
201
-
init_cwnd = 3;
202
if (*rcv_wnd > init_cwnd*mss)
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*rcv_wnd = init_cwnd*mss;
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}
···
190
}
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/* Set initial window to value enough for senders,
193
+
* following RFC2414. Senders, not following this RFC,
194
* will be satisfied with 2.
195
*/
196
if (mss > (1<<*rcv_wscale)) {
197
+
int init_cwnd;
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+
199
+
if (mss > 1460)
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init_cwnd = 2;
201
+
else
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+
init_cwnd = (mss > 1095) ? 3 : 4;
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if (*rcv_wnd > init_cwnd*mss)
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*rcv_wnd = init_cwnd*mss;
205
}