#!/bin/bash # Copyright (C) 2015-2017 Jason A. Donenfeld . All Rights Reserved. # This script tests the below topology: # # ┌─────────────────────┐ ┌──────────────────────────────────┐ ┌─────────────────────┐ # │ $ns1 namespace │ │ $ns0 namespace │ │ $ns2 namespace │ # │ │ │ │ │ │ # │┌────────┐ │ │ ┌────────┐ │ │ ┌────────┐│ # ││ wg1 │───────────┼───┼────────────│ lo │────────────┼───┼───────────│ wg2 ││ # │├────────┴──────────┐│ │ ┌───────┴────────┴────────┐ │ │┌──────────┴────────┤│ # ││192.168.241.1/24 ││ │ │(ns1) (ns2) │ │ ││192.168.241.2/24 ││ # ││fd00::1/24 ││ │ │127.0.0.1:1 127.0.0.1:2│ │ ││fd00::2/24 ││ # │└───────────────────┘│ │ │[::]:1 [::]:2 │ │ │└───────────────────┘│ # └─────────────────────┘ │ └─────────────────────────┘ │ └─────────────────────┘ # └──────────────────────────────────┘ # # After the topology is prepared we run a series of TCP/UDP iperf3 tests between the # wireguard peers in $ns1 and $ns2. Note that $ns0 is the endpoint for the wg1 # interfaces in $ns1 and $ns2. See https://www.wireguard.com/netns/ for further # details on how this is accomplished. set -e exec 3>&1 export WG_HIDE_KEYS=never netns0="wg-test-$$-0" netns1="wg-test-$$-1" netns2="wg-test-$$-2" program="../wireguard-go" export LOG_LEVEL="debug" pretty() { echo -e "\x1b[32m\x1b[1m[+] ${1:+NS$1: }${2}\x1b[0m" >&3; } pp() { pretty "" "$*"; "$@"; } maybe_exec() { if [[ $BASHPID -eq $$ ]]; then "$@"; else exec "$@"; fi; } n0() { pretty 0 "$*"; maybe_exec ip netns exec $netns0 "$@"; } n1() { pretty 1 "$*"; maybe_exec ip netns exec $netns1 "$@"; } n2() { pretty 2 "$*"; maybe_exec ip netns exec $netns2 "$@"; } ip0() { pretty 0 "ip $*"; ip -n $netns0 "$@"; } ip1() { pretty 1 "ip $*"; ip -n $netns1 "$@"; } ip2() { pretty 2 "ip $*"; ip -n $netns2 "$@"; } sleep() { read -t "$1" -N 0 || true; } waitiperf() { pretty "${1//*-}" "wait for iperf:5201"; while [[ $(ss -N "$1" -tlp 'sport = 5201') != *iperf3* ]]; do sleep 0.1; done; } waitncatudp() { pretty "${1//*-}" "wait for udp:1111"; while [[ $(ss -N "$1" -ulp 'sport = 1111') != *ncat* ]]; do sleep 0.1; done; } waitiface() { pretty "${1//*-}" "wait for $2 to come up"; ip netns exec "$1" bash -c "while [[ \$(< \"/sys/class/net/$2/operstate\") != up ]]; do read -t .1 -N 0 || true; done;"; } cleanup() { n0 wg show set +e exec 2>/dev/null printf "$orig_message_cost" > /proc/sys/net/core/message_cost ip0 link del dev wg1 ip1 link del dev wg1 ip2 link del dev wg1 local to_kill="$(ip netns pids $netns0) $(ip netns pids $netns1) $(ip netns pids $netns2)" [[ -n $to_kill ]] && kill $to_kill pp ip netns del $netns1 pp ip netns del $netns2 pp ip netns del $netns0 exit } orig_message_cost="$(< /proc/sys/net/core/message_cost)" trap cleanup EXIT printf 0 > /proc/sys/net/core/message_cost ip netns del $netns0 2>/dev/null || true ip netns del $netns1 2>/dev/null || true ip netns del $netns2 2>/dev/null || true pp ip netns add $netns0 pp ip netns add $netns1 pp ip netns add $netns2 ip0 link set up dev lo # ip0 link add dev wg1 type wireguard n0 $program -f wg1 & sleep 1 ip0 link set wg1 netns $netns1 # ip0 link add dev wg1 type wireguard n0 $program -f wg2 & sleep 1 ip0 link set wg2 netns $netns2 key1="$(pp wg genkey)" key2="$(pp wg genkey)" pub1="$(pp wg pubkey <<<"$key1")" pub2="$(pp wg pubkey <<<"$key2")" psk="$(pp wg genpsk)" [[ -n $key1 && -n $key2 && -n $psk ]] configure_peers() { ip1 addr add 192.168.241.1/24 dev wg1 ip1 addr add fd00::1/24 dev wg1 ip2 addr add 192.168.241.2/24 dev wg2 ip2 addr add fd00::2/24 dev wg2 n0 wg set wg1 \ private-key <(echo "$key1") \ listen-port 10000 \ peer "$pub2" \ preshared-key <(echo "$psk") \ allowed-ips 192.168.241.2/32,fd00::2/128 n0 wg set wg2 \ private-key <(echo "$key2") \ listen-port 20000 \ peer "$pub1" \ preshared-key <(echo "$psk") \ allowed-ips 192.168.241.1/32,fd00::1/128 n0 wg showconf wg1 n0 wg showconf wg2 ip1 link set up dev wg1 ip2 link set up dev wg2 } configure_peers tests() { # Ping over IPv4 n2 ping -c 10 -f -W 1 192.168.241.1 n1 ping -c 10 -f -W 1 192.168.241.2 # Ping over IPv6 n2 ping6 -c 10 -f -W 1 fd00::1 n1 ping6 -c 10 -f -W 1 fd00::2 # TCP over IPv4 n2 iperf3 -s -1 -B 192.168.241.2 & waitiperf $netns2 n1 iperf3 -Z -n 1G -c 192.168.241.2 # TCP over IPv6 n1 iperf3 -s -1 -B fd00::1 & waitiperf $netns1 n2 iperf3 -Z -n 1G -c fd00::1 # UDP over IPv4 n1 iperf3 -s -1 -B 192.168.241.1 & waitiperf $netns1 n2 iperf3 -Z -n 1G -b 0 -u -c 192.168.241.1 # UDP over IPv6 n2 iperf3 -s -1 -B fd00::2 & waitiperf $netns2 n1 iperf3 -Z -n 1G -b 0 -u -c fd00::2 } [[ $(ip1 link show dev wg1) =~ mtu\ ([0-9]+) ]] && orig_mtu="${BASH_REMATCH[1]}" big_mtu=$(( 34816 - 1500 + $orig_mtu )) # Test using IPv4 as outer transport n0 wg set wg1 peer "$pub2" endpoint 127.0.0.1:20000 n0 wg set wg2 peer "$pub1" endpoint 127.0.0.1:10000 n0 wg show # Before calling tests, we first make sure that the stats counters are working n2 ping -c 10 -f -W 1 192.168.241.1 { read _; read _; read _; read rx_bytes _; read _; read tx_bytes _; } < <(ip2 -stats link show dev wg2) [[ $rx_bytes -ge 932 && $tx_bytes -ge 1516 && $rx_bytes -lt 2500 && $rx_bytes -lt 2500 ]] tests ip1 link set wg1 mtu $big_mtu ip2 link set wg2 mtu $big_mtu tests ip1 link set wg1 mtu $orig_mtu ip2 link set wg2 mtu $orig_mtu # Test using IPv6 as outer transport n0 wg set wg1 peer "$pub2" endpoint [::1]:20000 n0 wg set wg2 peer "$pub1" endpoint [::1]:10000 tests ip1 link set wg1 mtu $big_mtu ip2 link set wg2 mtu $big_mtu tests ip1 link set wg1 mtu $orig_mtu ip2 link set wg2 mtu $orig_mtu # Test using IPv4 that roaming works ip0 -4 addr del 127.0.0.1/8 dev lo ip0 -4 addr add 127.212.121.99/8 dev lo n0 wg set wg1 listen-port 9999 n0 wg set wg1 peer "$pub2" endpoint 127.0.0.1:20000 n1 ping6 -W 1 -c 1 fd00::20000 [[ $(n2 wg show wg2 endpoints) == "$pub1 127.212.121.99:9999" ]] # Test using IPv6 that roaming works n1 wg set wg1 listen-port 9998 n1 wg set wg1 peer "$pub2" endpoint [::1]:20000 n1 ping -W 1 -c 1 192.168.241.2 [[ $(n2 wg show wg2 endpoints) == "$pub1 [::1]:9998" ]] # Test that crypto-RP filter works n1 wg set wg1 peer "$pub2" allowed-ips 192.168.241.0/24 exec 4< <(n1 ncat -l -u -p 1111) nmap_pid=$! waitncatudp $netns1 n2 ncat -u 192.168.241.1 1111 <<<"X" read -r -N 1 -t 1 out <&4 && [[ $out == "X" ]] kill $nmap_pid more_specific_key="$(pp wg genkey | pp wg pubkey)" n0 wg set wg1 peer "$more_specific_key" allowed-ips 192.168.241.2/32 n0 wg set wg2 listen-port 9997 exec 4< <(n1 ncat -l -u -p 1111) nmap_pid=$! waitncatudp $netns1 n2 ncat -u 192.168.241.1 1111 <<<"X" ! read -r -N 1 -t 1 out <&4 kill $nmap_pid n0 wg set wg1 peer "$more_specific_key" remove [[ $(n1 wg show wg1 endpoints) == "$pub2 [::1]:9997" ]] ip1 link del wg1 ip2 link del wg2 # Test using NAT. We now change the topology to this: # ┌────────────────────────────────────────┐ ┌────────────────────────────────────────────────┐ ┌────────────────────────────────────────┐ # │ $ns1 namespace │ │ $ns0 namespace │ │ $ns2 namespace │ # │ │ │ │ │ │ # │ ┌─────┐ ┌─────┐ │ │ ┌──────┐ ┌──────┐ │ │ ┌─────┐ ┌─────┐ │ # │ │ wg1 │─────────────│vethc│───────────┼────┼────│vethrc│ │vethrs│──────────────┼─────┼──│veths│────────────│ wg2 │ │ # │ ├─────┴──────────┐ ├─────┴──────────┐│ │ ├──────┴─────────┐ ├──────┴────────────┐ │ │ ├─────┴──────────┐ ├─────┴──────────┐ │ # │ │192.168.241.1/24│ │192.168.1.100/24││ │ │192.168.1.100/24│ │10.0.0.1/24 │ │ │ │10.0.0.100/24 │ │192.168.241.2/24│ │ # │ │fd00::1/24 │ │ ││ │ │ │ │SNAT:192.168.1.0/24│ │ │ │ │ │fd00::2/24 │ │ # │ └────────────────┘ └────────────────┘│ │ └────────────────┘ └───────────────────┘ │ │ └────────────────┘ └────────────────┘ │ # └────────────────────────────────────────┘ └────────────────────────────────────────────────┘ └────────────────────────────────────────┘ # ip1 link add dev wg1 type wireguard # ip2 link add dev wg1 type wireguard n1 $program wg1 n2 $program wg2 configure_peers ip0 link add vethrc type veth peer name vethc ip0 link add vethrs type veth peer name veths ip0 link set vethc netns $netns1 ip0 link set veths netns $netns2 ip0 link set vethrc up ip0 link set vethrs up ip0 addr add 192.168.1.1/24 dev vethrc ip0 addr add 10.0.0.1/24 dev vethrs ip1 addr add 192.168.1.100/24 dev vethc ip1 link set vethc up ip1 route add default via 192.168.1.1 ip2 addr add 10.0.0.100/24 dev veths ip2 link set veths up waitiface $netns0 vethrc waitiface $netns0 vethrs waitiface $netns1 vethc waitiface $netns2 veths n0 bash -c 'printf 1 > /proc/sys/net/ipv4/ip_forward' n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout' n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout_stream' n0 iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -d 10.0.0.0/24 -j SNAT --to 10.0.0.1 n0 wg set wg1 peer "$pub2" endpoint 10.0.0.100:20000 persistent-keepalive 1 n1 ping -W 1 -c 1 192.168.241.2 n2 ping -W 1 -c 1 192.168.241.1 [[ $(n2 wg show wg2 endpoints) == "$pub1 10.0.0.1:10000" ]] # Demonstrate n2 can still send packets to n1, since persistent-keepalive will prevent connection tracking entry from expiring (to see entries: `n0 conntrack -L`). pp sleep 3 n2 ping -W 1 -c 1 192.168.241.1 n0 iptables -t nat -F ip0 link del vethrc ip0 link del vethrs ip1 link del wg1 ip2 link del wg2 # Test that saddr routing is sticky but not too sticky, changing to this topology: # ┌────────────────────────────────────────┐ ┌────────────────────────────────────────┐ # │ $ns1 namespace │ │ $ns2 namespace │ # │ │ │ │ # │ ┌─────┐ ┌─────┐ │ │ ┌─────┐ ┌─────┐ │ # │ │ wg1 │─────────────│veth1│───────────┼────┼──│veth2│────────────│ wg2 │ │ # │ ├─────┴──────────┐ ├─────┴──────────┐│ │ ├─────┴──────────┐ ├─────┴──────────┐ │ # │ │192.168.241.1/24│ │10.0.0.1/24 ││ │ │10.0.0.2/24 │ │192.168.241.2/24│ │ # │ │fd00::1/24 │ │fd00:aa::1/96 ││ │ │fd00:aa::2/96 │ │fd00::2/24 │ │ # │ └────────────────┘ └────────────────┘│ │ └────────────────┘ └────────────────┘ │ # └────────────────────────────────────────┘ └────────────────────────────────────────┘ # ip1 link add dev wg1 type wireguard # ip2 link add dev wg1 type wireguard n1 $program wg1 n2 $program wg1 configure_peers ip1 link add veth1 type veth peer name veth2 ip1 link set veth2 netns $netns2 n1 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/veth1/accept_dad' n2 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/veth2/accept_dad' n1 bash -c 'printf 1 > /proc/sys/net/ipv4/conf/veth1/promote_secondaries' # First we check that we aren't overly sticky and can fall over to new IPs when old ones are removed ip1 addr add 10.0.0.1/24 dev veth1 ip1 addr add fd00:aa::1/96 dev veth1 ip2 addr add 10.0.0.2/24 dev veth2 ip2 addr add fd00:aa::2/96 dev veth2 ip1 link set veth1 up ip2 link set veth2 up waitiface $netns1 veth1 waitiface $netns2 veth2 n0 wg set wg1 peer "$pub2" endpoint 10.0.0.2:20000 n1 ping -W 1 -c 1 192.168.241.2 ip1 addr add 10.0.0.10/24 dev veth1 ip1 addr del 10.0.0.1/24 dev veth1 n1 ping -W 1 -c 1 192.168.241.2 n0 wg set wg1 peer "$pub2" endpoint [fd00:aa::2]:20000 n1 ping -W 1 -c 1 192.168.241.2 ip1 addr add fd00:aa::10/96 dev veth1 ip1 addr del fd00:aa::1/96 dev veth1 n1 ping -W 1 -c 1 192.168.241.2 # Now we show that we can successfully do reply to sender routing ip1 link set veth1 down ip2 link set veth2 down ip1 addr flush dev veth1 ip2 addr flush dev veth2 ip1 addr add 10.0.0.1/24 dev veth1 ip1 addr add 10.0.0.2/24 dev veth1 ip1 addr add fd00:aa::1/96 dev veth1 ip1 addr add fd00:aa::2/96 dev veth1 ip2 addr add 10.0.0.3/24 dev veth2 ip2 addr add fd00:aa::3/96 dev veth2 ip1 link set veth1 up ip2 link set veth2 up waitiface $netns1 veth1 waitiface $netns2 veth2 n0 wg set wg2 peer "$pub1" endpoint 10.0.0.1:10000 n2 ping -W 1 -c 1 192.168.241.1 [[ $(n0 wg show wg2 endpoints) == "$pub1 10.0.0.1:10000" ]] n0 wg set wg2 peer "$pub1" endpoint [fd00:aa::1]:10000 n2 ping -W 1 -c 1 192.168.241.1 [[ $(n0 wg show wg2 endpoints) == "$pub1 [fd00:aa::1]:10000" ]] n0 wg set wg2 peer "$pub1" endpoint 10.0.0.2:10000 n2 ping -W 1 -c 1 192.168.241.1 [[ $(n0 wg show wg2 endpoints) == "$pub1 10.0.0.2:10000" ]] n0 wg set wg2 peer "$pub1" endpoint [fd00:aa::2]:10000 n2 ping -W 1 -c 1 192.168.241.1 [[ $(n0 wg show wg2 endpoints) == "$pub1 [fd00:aa::2]:10000" ]] ip1 link del veth1 ip1 link del wg1 ip2 link del wg2