1// SPDX-License-Identifier: GPL-2.0 2// Test PRR-slowstart implementation. The sender sends 20 packets. Packet 3// 1 to 4, and 11 to 16 are dropped. 4`./defaults.sh` 5 6// Establish a connection. 7 0 socket(..., SOCK_STREAM, IPPROTO_TCP) = 3 8 +0 setsockopt(3, SOL_SOCKET, SO_REUSEADDR, [1], 4) = 0 9 +0 bind(3, ..., ...) = 0 10 +0 listen(3, 1) = 0 11 12 +0 < S 0:0(0) win 32792 <mss 1000,sackOK,nop,nop,nop,wscale 7> 13 +0 > S. 0:0(0) ack 1 <mss 1460,nop,nop,sackOK,nop,wscale 8> 14 15 +.01 < . 1:1(0) ack 1 win 320 16 +0 accept(3, ..., ...) = 4 17 18// Write 20 data segments. 19 +0 write(4, ..., 20000) = 20000 20 +0 > P. 1:10001(10000) ack 1 21 22// Receive first DUPACK, entering PRR part 23 +.01 < . 1:1(0) ack 1 win 320 <sack 4001:5001,nop,nop> 24 +0 > . 10001:11001(1000) ack 1 25+.002 < . 1:1(0) ack 1 win 320 <sack 4001:6001,nop,nop> 26 +0 > . 11001:12001(1000) ack 1 27+.002 < . 1:1(0) ack 1 win 320 <sack 4001:7001,nop,nop> 28 +0 > . 1:1001(1000) ack 1 29+.002 < . 1:1(0) ack 1 win 320 <sack 4001:8001,nop,nop> 30 +0 > . 1001:2001(1000) ack 1 31+.002 < . 1:1(0) ack 1 win 320 <sack 4001:9001,nop,nop> 32 +0 > . 2001:3001(1000) ack 1 33+.002 < . 1:1(0) ack 1 win 320 <sack 4001:10001,nop,nop> 34 +0 > . 3001:4001(1000) ack 1 35// Enter PRR CRB 36+.002 < . 1:1(0) ack 1 win 320 <sack 4001:11001,nop,nop> 37 +0 > . 12001:13001(1000) ack 1 38+.002 < . 1:1(0) ack 1 win 320 <sack 4001:12001,nop,nop> 39 +0 > . 13001:14001(1000) ack 1 40// Enter PRR slow start 41 +.01 < . 1:1(0) ack 1001 win 320 <sack 4001:12001,nop,nop> 42 +0 > P. 14001:16001(2000) ack 1 43+.002 < . 1:1(0) ack 1001 win 320 <sack 2001:12001,nop,nop> 44 +0 > . 1001:2001(1000) ack 1 45 +0 > . 16001:17001(1000) ack 1 46// inflight reaches ssthresh, goes into packet conservation mode 47+.002 < . 1:1(0) ack 1001 win 320 <sack 2001:13001,nop,nop> 48 +0 > . 17001:18001(1000) ack 1 49+.002 < . 1:1(0) ack 1001 win 320 <sack 2001:14001,nop,nop> 50 +0 > . 18001:19001(1000) ack 1 51