1*6f669205SSoham Chakradeo// SPDX-License-Identifier: GPL-2.0 2*6f669205SSoham Chakradeo// Test TCP does not append any data from consequent writes to the tail 3*6f669205SSoham Chakradeo// skb created for the chunk. The large chunk itself should be packetized as 4*6f669205SSoham Chakradeo// usual. 5*6f669205SSoham Chakradeo`./defaults.sh 6*6f669205SSoham Chakradeo` 7*6f669205SSoham Chakradeo 8*6f669205SSoham Chakradeo// Initialize connection 9*6f669205SSoham Chakradeo 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 10*6f669205SSoham Chakradeo +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 11*6f669205SSoham Chakradeo +0 bind(3, ..., ...) = 0 12*6f669205SSoham Chakradeo +0 listen(3, 1) = 0 13*6f669205SSoham Chakradeo 14*6f669205SSoham Chakradeo +0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 10> 15*6f669205SSoham Chakradeo +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8> 16*6f669205SSoham Chakradeo +.01 < . 1:1(0) ack 1 win 514 17*6f669205SSoham Chakradeo 18*6f669205SSoham Chakradeo +0 accept(3, ..., ...) = 4 19*6f669205SSoham Chakradeo 20*6f669205SSoham Chakradeo// Write a 10400B chunk to fill the ICW, and have a 400 byte skb sitting on 21*6f669205SSoham Chakradeo// the tail. 22*6f669205SSoham Chakradeo +0 write(4, ..., 10400) = 10400 23*6f669205SSoham Chakradeo 24*6f669205SSoham Chakradeo// Write another 10040B chunk with no coalescing options. 25*6f669205SSoham Chakradeo +0 send(4, ..., 10400, MSG_EOR) = 10400 26*6f669205SSoham Chakradeo 27*6f669205SSoham Chakradeo// Write a 2KB chunk. This chunk should not be appended to the packets created 28*6f669205SSoham Chakradeo// the previous chunk. 29*6f669205SSoham Chakradeo +0 write(4, ..., 2000) = 2000 30*6f669205SSoham Chakradeo 31*6f669205SSoham Chakradeo +0 > P. 1:10001(10000) ack 1 32*6f669205SSoham Chakradeo+.001 < . 1:1(0) ack 10001 win 514 33*6f669205SSoham Chakradeo// Now we have enough room to send out the 2 x 400B packets out. 34*6f669205SSoham Chakradeo +0 > P. 10001:20801(10800) ack 1 35*6f669205SSoham Chakradeo+.001 < . 1:1(0) ack 20801 win 514 36*6f669205SSoham Chakradeo// This 2KB packet should be sent alone. 37*6f669205SSoham Chakradeo +0 > P. 20801:22801(2000) ack 1 38*6f669205SSoham Chakradeo+.001 < . 1:1(0) ack 22801 win 514 39