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| author | Eric Dumazet <edumazet@google.com> | 2016-08-22 20:31:10 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2016-08-24 01:55:49 +0200 |
| commit | 20a2b49fc538540819a0c552877086548cff8d8d (patch) | |
| tree | ee2139e2ca455ec54ba6ba83c3ca134c27bff1b7 /net/ax25 | |
| parent | gianfar: fix size of scatter-gathered frames (diff) | |
| download | linux-20a2b49fc538540819a0c552877086548cff8d8d.tar.xz linux-20a2b49fc538540819a0c552877086548cff8d8d.zip | |
tcp: properly scale window in tcp_v[46]_reqsk_send_ack()
When sending an ack in SYN_RECV state, we must scale the offered
window if wscale option was negotiated and accepted.
Tested:
Following packetdrill test demonstrates the issue :
0.000 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3
+0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0
+0 bind(3, ..., ...) = 0
+0 listen(3, 1) = 0
// Establish a connection.
+0 < S 0:0(0) win 20000 <mss 1000,sackOK,wscale 7, nop, TS val 100 ecr 0>
+0 > S. 0:0(0) ack 1 win 28960 <mss 1460,sackOK, TS val 100 ecr 100, nop, wscale 7>
+0 < . 1:11(10) ack 1 win 156 <nop,nop,TS val 99 ecr 100>
// check that window is properly scaled !
+0 > . 1:1(0) ack 1 win 226 <nop,nop,TS val 200 ecr 100>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Yuchung Cheng <ycheng@google.com>
Cc: Neal Cardwell <ncardwell@google.com>
Acked-by: Yuchung Cheng <ycheng@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ax25')
0 files changed, 0 insertions, 0 deletions