tfo_passive.sh

  1#!/bin/bash
  2# SPDX-License-Identifier: GPL-2.0
  3source lib.sh
  4
  5NSIM_SV_ID=$((256 + RANDOM % 256))
  6NSIM_SV_SYS=/sys/bus/netdevsim/devices/netdevsim$NSIM_SV_ID
  7NSIM_CL_ID=$((512 + RANDOM % 256))
  8NSIM_CL_SYS=/sys/bus/netdevsim/devices/netdevsim$NSIM_CL_ID
  9
 10NSIM_DEV_SYS_NEW=/sys/bus/netdevsim/new_device
 11NSIM_DEV_SYS_DEL=/sys/bus/netdevsim/del_device
 12NSIM_DEV_SYS_LINK=/sys/bus/netdevsim/link_device
 13NSIM_DEV_SYS_UNLINK=/sys/bus/netdevsim/unlink_device
 14
 15SERVER_IP=192.168.1.1
 16CLIENT_IP=192.168.1.2
 17SERVER_PORT=48675
 18
 19setup_ns()
 20{
 21	set -e
 22	ip netns add nssv
 23	ip netns add nscl
 24
 25	NSIM_SV_NAME=$(find $NSIM_SV_SYS/net -maxdepth 1 -type d ! \
 26		-path $NSIM_SV_SYS/net -exec basename {} \;)
 27	NSIM_CL_NAME=$(find $NSIM_CL_SYS/net -maxdepth 1 -type d ! \
 28		-path $NSIM_CL_SYS/net -exec basename {} \;)
 29
 30	ip link set $NSIM_SV_NAME netns nssv
 31	ip link set $NSIM_CL_NAME netns nscl
 32
 33	ip netns exec nssv ip addr add "${SERVER_IP}/24" dev $NSIM_SV_NAME
 34	ip netns exec nscl ip addr add "${CLIENT_IP}/24" dev $NSIM_CL_NAME
 35
 36	ip netns exec nssv ip link set dev $NSIM_SV_NAME up
 37	ip netns exec nscl ip link set dev $NSIM_CL_NAME up
 38
 39	# Enable passive TFO
 40	ip netns exec nssv sysctl -w net.ipv4.tcp_fastopen=519 > /dev/null
 41
 42	set +e
 43}
 44
 45cleanup_ns()
 46{
 47	ip netns del nscl
 48	ip netns del nssv
 49}
 50
 51###
 52### Code start
 53###
 54
 55modprobe netdevsim
 56
 57# linking
 58
 59echo $NSIM_SV_ID > $NSIM_DEV_SYS_NEW
 60echo $NSIM_CL_ID > $NSIM_DEV_SYS_NEW
 61udevadm settle
 62
 63setup_ns
 64
 65NSIM_SV_FD=$((256 + RANDOM % 256))
 66exec {NSIM_SV_FD}</var/run/netns/nssv
 67NSIM_SV_IFIDX=$(ip netns exec nssv cat /sys/class/net/$NSIM_SV_NAME/ifindex)
 68
 69NSIM_CL_FD=$((256 + RANDOM % 256))
 70exec {NSIM_CL_FD}</var/run/netns/nscl
 71NSIM_CL_IFIDX=$(ip netns exec nscl cat /sys/class/net/$NSIM_CL_NAME/ifindex)
 72
 73echo "$NSIM_SV_FD:$NSIM_SV_IFIDX $NSIM_CL_FD:$NSIM_CL_IFIDX" > \
 74     $NSIM_DEV_SYS_LINK
 75
 76if [ $? -ne 0 ]; then
 77	echo "linking netdevsim1 with netdevsim2 should succeed"
 78	cleanup_ns
 79	exit 1
 80fi
 81
 82out_file=$(mktemp)
 83
 84timeout -k 1s 30s ip netns exec nssv ./tfo        \
 85				-s                \
 86				-p ${SERVER_PORT} \
 87				-o ${out_file}&
 88
 89wait_local_port_listen nssv ${SERVER_PORT} tcp
 90
 91ip netns exec nscl ./tfo -c -h ${SERVER_IP} -p ${SERVER_PORT}
 92
 93wait
 94
 95res=$(cat $out_file)
 96rm $out_file
 97
 98if [ "$res" = "0" ]; then
 99	echo "got invalid NAPI ID from passive TFO socket"
100	cleanup_ns
101	exit 1
102fi
103
104echo "$NSIM_SV_FD:$NSIM_SV_IFIDX" > $NSIM_DEV_SYS_UNLINK
105
106echo $NSIM_CL_ID > $NSIM_DEV_SYS_DEL
107
108cleanup_ns
109
110modprobe -r netdevsim
111
112exit 0