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selftest/net/ovpn: extend coverage with more test cases

Browse source 
To increase code coverage, extend the ovpn selftests with the following
cases:
* connect UDP peers using a mix of IPv6 and IPv4 at the transport layer
* run full test with tunnel MTU equal to transport MTU (exercising
  IP layer fragmentation)
* ping "LAN IP" served by VPN peer ("LAN behind a client" test case)

Signed-off-by: Antonio Quartulli <antonio@openvpn.net>
This commit is contained in:
Antonio Quartulli 2025-05-06 15:01:00 +02:00
parent 47e8e9d29e
commit 944f8b6aba
5 changed files with 34 additions and 11 deletions
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1
tools/testing/selftests/net/ovpn/Makefile
View file

@ -20,6 +20,7 @@ LDLIBS += $(VAR_LDLIBS)
TEST_FILES = common.sh
TEST_PROGS = test.sh \
test-large-mtu.sh \
test-chachapoly.sh \
test-tcp.sh \
test-float.sh \

18
tools/testing/selftests/net/ovpn/common.sh
View file

@ -11,6 +11,8 @@ ALG=${ALG:-aes}
PROTO=${PROTO:-UDP}
FLOAT=${FLOAT:-0}
LAN_IP="11.11.11.11"
create_ns() {
ip netns add peer${1}
}
@ -24,15 +26,25 @@ setup_ns() {
ip link add veth${p} netns peer0 type veth peer name veth${p} netns peer${p}
ip -n peer0 addr add 10.10.${p}.1/24 dev veth${p}
ip -n peer0 addr add fd00:0:0:${p}::1/64 dev veth${p}
ip -n peer0 link set veth${p} up
ip -n peer${p} addr add 10.10.${p}.2/24 dev veth${p}
ip -n peer${p} addr add fd00:0:0:${p}::2/64 dev veth${p}
ip -n peer${p} link set veth${p} up
done
fi
ip netns exec peer${1} ${OVPN_CLI} new_iface tun${1} $MODE
ip -n peer${1} addr add ${2} dev tun${1}
# add a secondary IP to peer 1, to test a LAN behind a client
if [ ${1} -eq 1 -a -n "${LAN_IP}" ]; then
ip -n peer${1} addr add ${LAN_IP} dev tun${1}
ip -n peer0 route add ${LAN_IP} via $(echo ${2} |sed -e s'!/.*!!') dev tun0
fi
if [ -n "${3}" ]; then
ip -n peer${1} link set mtu ${3} dev tun${1}
fi
ip -n peer${1} link set tun${1} up
}
@ -46,7 +58,11 @@ add_peer() {
data64.key
done
else
ip netns exec peer${1} ${OVPN_CLI} new_peer tun${1} ${1} 1 10.10.${1}.1 1
RADDR=$(awk "NR == ${1} {print \$2}" ${UDP_PEERS_FILE})
RPORT=$(awk "NR == ${1} {print \$3}" ${UDP_PEERS_FILE})
LPORT=$(awk "NR == ${1} {print \$5}" ${UDP_PEERS_FILE})
ip netns exec peer${1} ${OVPN_CLI} new_peer tun${1} ${1} ${LPORT} \
${RADDR} ${RPORT}
ip netns exec peer${1} ${OVPN_CLI} new_key tun${1} ${1} 1 0 ${ALG} 1 \
data64.key
fi

9
tools/testing/selftests/net/ovpn/ovpn-cli.c
View file

@ -1934,7 +1934,8 @@ static void ovpn_waitbg(void)
static int ovpn_run_cmd(struct ovpn_ctx *ovpn)
{
char peer_id[10], vpnip[INET6_ADDRSTRLEN], raddr[128], rport[10];
char peer_id[10], vpnip[INET6_ADDRSTRLEN], laddr[128], lport[10];
char raddr[128], rport[10];
int n, ret;
FILE *fp;
@ -2050,8 +2051,8 @@ static int ovpn_run_cmd(struct ovpn_ctx *ovpn)
return -1;
}
while ((n = fscanf(fp, "%s %s %s %s\n", peer_id, raddr, rport,
vpnip)) == 4) {
while ((n = fscanf(fp, "%s %s %s %s %s %s\n", peer_id, laddr,
lport, raddr, rport, vpnip)) == 6) {
struct ovpn_ctx peer_ctx = { 0 };
peer_ctx.ifindex = ovpn->ifindex;
@ -2355,7 +2356,7 @@ int main(int argc, char *argv[])
}
memset(&ovpn, 0, sizeof(ovpn));
ovpn.sa_family = AF_INET;
ovpn.sa_family = AF_UNSPEC;
ovpn.cipher = OVPN_CIPHER_ALG_NONE;
ovpn.cmd = ovpn_parse_cmd(argv[1]);

6
tools/testing/selftests/net/ovpn/test.sh
View file

@ -18,7 +18,7 @@ for p in $(seq 0 ${NUM_PEERS}); do
done
for p in $(seq 0 ${NUM_PEERS}); do
setup_ns ${p} 5.5.5.$((${p} + 1))/24
setup_ns ${p} 5.5.5.$((${p} + 1))/24 ${MTU}
done
for p in $(seq 0 ${NUM_PEERS}); do
@ -34,8 +34,12 @@ sleep 1
for p in $(seq 1 ${NUM_PEERS}); do
ip netns exec peer0 ping -qfc 500 -w 3 5.5.5.$((${p} + 1))
ip netns exec peer0 ping -qfc 500 -s 3000 -w 3 5.5.5.$((${p} + 1))
done
# ping LAN behind client 1
ip netns exec peer0 ping -qfc 500 -w 3 ${LAN_IP}
if [ "$FLOAT" == "1" ]; then
# make clients float..
for p in $(seq 1 ${NUM_PEERS}); do

11
tools/testing/selftests/net/ovpn/udp_peers.txt
View file

@ -1,5 +1,6 @@
1 10.10.1.2 1 5.5.5.2
2 10.10.2.2 1 5.5.5.3
3 10.10.3.2 1 5.5.5.4
4 10.10.4.2 1 5.5.5.5
5 10.10.5.2 1 5.5.5.6
1 10.10.1.1 1 10.10.1.2 1 5.5.5.2
2 10.10.2.1 1 10.10.2.2 1 5.5.5.3
3 10.10.3.1 1 10.10.3.2 1 5.5.5.4
4 fd00:0:0:4::1 1 fd00:0:0:4::2 1 5.5.5.5
5 fd00:0:0:5::1 1 fd00:0:0:5::2 1 5.5.5.6
6 fd00:0:0:6::1 1 fd00:0:0:6::2 1 5.5.5.7