1// SPDX-License-Identifier: GPL-2.0 2// Test that we reject TS val updates on a packet with invalid ACK sequence 3 4`./defaults.sh 5` 6 7// Create a socket. 8 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 9 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 10 11 +0 bind(3, ..., ...) = 0 12 +0 listen(3, 1) = 0 13 14// Establish a connection. 15 +.1 < S 0:0(0) win 20000 <mss 1000,sackOK,TS val 100 ecr 0> 16 +0 > S. 0:0(0) ack 1 <mss 1460,sackOK,TS val 100 ecr 100> 17 +.1 < . 1:1(0) ack 1 win 20000 <nop,nop,TS val 200 ecr 100> 18 +0 accept(3, ..., ...) = 4 19 20// bad packet with high tsval (its ACK sequence is above our sndnxt) 21 +0 < F. 1:1(0) ack 9999 win 20000 <nop,nop,TS val 200000 ecr 100> 22 23 24 +0 < . 1:1001(1000) ack 1 win 20000 <nop,nop,TS val 201 ecr 100> 25 +0 > . 1:1(0) ack 1001 <nop,nop,TS val 200 ecr 201> 26