peer.sh

  1#!/bin/bash
  2# SPDX-License-Identifier: GPL-2.0-only
  3
  4lib_dir=$(dirname $0)/../../../net
  5source $lib_dir/lib.sh
  6
  7NSIM_DEV_1_ID=$((256 + RANDOM % 256))
  8NSIM_DEV_1_SYS=/sys/bus/netdevsim/devices/netdevsim$NSIM_DEV_1_ID
  9NSIM_DEV_2_ID=$((512 + RANDOM % 256))
 10NSIM_DEV_2_SYS=/sys/bus/netdevsim/devices/netdevsim$NSIM_DEV_2_ID
 11
 12NSIM_DEV_SYS_NEW=/sys/bus/netdevsim/new_device
 13NSIM_DEV_SYS_DEL=/sys/bus/netdevsim/del_device
 14NSIM_DEV_SYS_LINK=/sys/bus/netdevsim/link_device
 15NSIM_DEV_SYS_UNLINK=/sys/bus/netdevsim/unlink_device
 16
 17socat_check()
 18{
 19	if [ ! -x "$(command -v socat)" ]; then
 20		echo "socat command not found. Skipping test"
 21		return 1
 22	fi
 23
 24	return 0
 25}
 26
 27setup_ns()
 28{
 29	set -e
 30	ip netns add nssv
 31	ip netns add nscl
 32
 33	NSIM_DEV_1_NAME=$(find $NSIM_DEV_1_SYS/net -maxdepth 1 -type d ! \
 34		-path $NSIM_DEV_1_SYS/net -exec basename {} \;)
 35	NSIM_DEV_2_NAME=$(find $NSIM_DEV_2_SYS/net -maxdepth 1 -type d ! \
 36		-path $NSIM_DEV_2_SYS/net -exec basename {} \;)
 37
 38	ip link set $NSIM_DEV_1_NAME netns nssv
 39	ip link set $NSIM_DEV_2_NAME netns nscl
 40
 41	ip netns exec nssv ip addr add '192.168.1.1/24' dev $NSIM_DEV_1_NAME
 42	ip netns exec nscl ip addr add '192.168.1.2/24' dev $NSIM_DEV_2_NAME
 43
 44	ip netns exec nssv ip link set dev $NSIM_DEV_1_NAME up
 45	ip netns exec nscl ip link set dev $NSIM_DEV_2_NAME up
 46	set +e
 47}
 48
 49cleanup_ns()
 50{
 51	ip netns del nscl
 52	ip netns del nssv
 53}
 54
 55is_carrier_up()
 56{
 57	local netns="$1"
 58	local nsim_dev="$2"
 59
 60	test "$(ip netns exec "$netns"	\
 61		cat /sys/class/net/"$nsim_dev"/carrier 2>/dev/null)" -eq 1
 62}
 63
 64assert_carrier_up()
 65{
 66	local netns="$1"
 67	local nsim_dev="$2"
 68
 69	if ! is_carrier_up "$netns" "$nsim_dev"; then
 70		echo "$nsim_dev's carrier should be UP, but it isn't"
 71		cleanup_ns
 72		exit 1
 73	fi
 74}
 75
 76assert_carrier_down()
 77{
 78	local netns="$1"
 79	local nsim_dev="$2"
 80
 81	if is_carrier_up "$netns" "$nsim_dev"; then
 82		echo "$nsim_dev's carrier should be DOWN, but it isn't"
 83		cleanup_ns
 84		exit 1
 85	fi
 86}
 87
 88###
 89### Code start
 90###
 91
 92socat_check || exit 4
 93
 94modprobe netdevsim
 95
 96# linking
 97
 98echo $NSIM_DEV_1_ID > $NSIM_DEV_SYS_NEW
 99echo $NSIM_DEV_2_ID > $NSIM_DEV_SYS_NEW
100udevadm settle
101
102setup_ns
103
104NSIM_DEV_1_FD=$((256 + RANDOM % 256))
105exec {NSIM_DEV_1_FD}</var/run/netns/nssv
106NSIM_DEV_1_IFIDX=$(ip netns exec nssv cat /sys/class/net/$NSIM_DEV_1_NAME/ifindex)
107
108NSIM_DEV_2_FD=$((256 + RANDOM % 256))
109exec {NSIM_DEV_2_FD}</var/run/netns/nscl
110NSIM_DEV_2_IFIDX=$(ip netns exec nscl cat /sys/class/net/$NSIM_DEV_2_NAME/ifindex)
111
112echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_2_FD:2000" > $NSIM_DEV_SYS_LINK 2>/dev/null
113if [ $? -eq 0 ]; then
114	echo "linking with non-existent netdevsim should fail"
115	cleanup_ns
116	exit 1
117fi
118
119echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX 2000:$NSIM_DEV_2_IFIDX" > $NSIM_DEV_SYS_LINK 2>/dev/null
120if [ $? -eq 0 ]; then
121	echo "linking with non-existent netnsid should fail"
122	cleanup_ns
123	exit 1
124fi
125
126echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX" > $NSIM_DEV_SYS_LINK 2>/dev/null
127if [ $? -eq 0 ]; then
128	echo "linking with self should fail"
129	cleanup_ns
130	exit 1
131fi
132
133echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_2_FD:$NSIM_DEV_2_IFIDX" > $NSIM_DEV_SYS_LINK
134if [ $? -ne 0 ]; then
135	echo "linking netdevsim1 with netdevsim2 should succeed"
136	cleanup_ns
137	exit 1
138fi
139
140# argument error checking
141
142echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_2_FD:a" > $NSIM_DEV_SYS_LINK 2>/dev/null
143if [ $? -eq 0 ]; then
144	echo "invalid arg should fail"
145	cleanup_ns
146	exit 1
147fi
148
149# netdevsim carrier state consistency checking
150assert_carrier_up nssv "$NSIM_DEV_1_NAME"
151assert_carrier_up nscl "$NSIM_DEV_2_NAME"
152
153echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX" > "$NSIM_DEV_SYS_UNLINK"
154
155assert_carrier_down nssv "$NSIM_DEV_1_NAME"
156assert_carrier_down nscl "$NSIM_DEV_2_NAME"
157
158ip netns exec nssv ip link set dev "$NSIM_DEV_1_NAME" down
159ip netns exec nssv ip link set dev "$NSIM_DEV_1_NAME" up
160
161assert_carrier_down nssv "$NSIM_DEV_1_NAME"
162assert_carrier_down nscl "$NSIM_DEV_2_NAME"
163
164echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX $NSIM_DEV_2_FD:$NSIM_DEV_2_IFIDX" > $NSIM_DEV_SYS_LINK
165
166assert_carrier_up nssv "$NSIM_DEV_1_NAME"
167assert_carrier_up nscl "$NSIM_DEV_2_NAME"
168
169ip netns exec nssv ip link set dev "$NSIM_DEV_1_NAME" down
170ip netns exec nssv ip link set dev "$NSIM_DEV_1_NAME" up
171
172assert_carrier_up nssv "$NSIM_DEV_1_NAME"
173assert_carrier_up nscl "$NSIM_DEV_2_NAME"
174
175# send/recv packets
176
177tmp_file=$(mktemp)
178ip netns exec nssv socat TCP-LISTEN:1234,fork $tmp_file &
179pid=$!
180res=0
181
182wait_local_port_listen nssv 1234 tcp
183
184echo "HI" | ip netns exec nscl socat STDIN TCP:192.168.1.1:1234
185
186count=$(cat $tmp_file | wc -c)
187if [[ $count -ne 3 ]]; then
188	echo "expected 3 bytes, got $count"
189	res=1
190fi
191
192echo "$NSIM_DEV_1_FD:$NSIM_DEV_1_IFIDX" > $NSIM_DEV_SYS_UNLINK
193
194echo $NSIM_DEV_2_ID > $NSIM_DEV_SYS_DEL
195
196kill $pid
197echo $NSIM_DEV_1_ID > $NSIM_DEV_SYS_DEL
198
199cleanup_ns
200
201modprobe -r netdevsim
202
203exit $res