| #!/bin/bash |
| # SPDX-License-Identifier: GPL-2.0 |
| # |
| # Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved. |
| # |
| # This script tests the below topology: |
| # |
| # ┌─────────────────────┐ ┌──────────────────────────────────┐ ┌─────────────────────┐ |
| # │ $ns1 namespace │ │ $ns0 namespace │ │ $ns2 namespace │ |
| # │ │ │ │ │ │ |
| # │┌────────┐ │ │ ┌────────┐ │ │ ┌────────┐│ |
| # ││ wg0 │───────────┼───┼────────────│ lo │────────────┼───┼───────────│ wg0 ││ |
| # │├────────┴──────────┐│ │ ┌───────┴────────┴────────┐ │ │┌──────────┴────────┤│ |
| # ││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 wg0 |
| # interfaces in $ns1 and $ns2. See https://www.wireguard.com/netns/ for further |
| # details on how this is accomplished. |
| set -e |
| shopt -s extglob |
| |
| exec 3>&1 |
| export LANG=C |
| export WG_HIDE_KEYS=never |
| NPROC=( /sys/devices/system/cpu/cpu+([0-9]) ); NPROC=${#NPROC[@]} |
| netns0="wg-test-$$-0" |
| netns1="wg-test-$$-1" |
| netns2="wg-test-$$-2" |
| pretty() { echo -e "\x1b[32m\x1b[1m[+] ${1:+NS$1: }${2}\x1b[0m" >&3; } |
| pp() { pretty "" "$*"; "$@"; } |
| maybe_exec() { if [[ $BASHPID -eq $$ ]]; 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 "$1" -N 1 || true; } |
| waitiperf() { pretty "${1//*-}" "wait for iperf:${3:-5201} pid $2"; while [[ $(ss -N "$1" -tlpH "sport = ${3:-5201}") != *\"iperf3\",pid=$2,fd=* ]]; do sleep 0.1; done; } |
| waitncatudp() { pretty "${1//*-}" "wait for udp:1111 pid $2"; while [[ $(ss -N "$1" -ulpH 'sport = 1111') != *\"ncat\",pid=$2,fd=* ]]; do sleep 0.1; done; } |
| waitiface() { pretty "${1//*-}" "wait for $2 to come up"; ip netns exec "$1" bash -c "while [[ \$(< \"/sys/class/net/$2/operstate\") != up ]]; do read -t .1 -N 0 || true; done;"; } |
| |
| cleanup() { |
| set +e |
| exec 2>/dev/null |
| printf "$orig_message_cost" > /proc/sys/net/core/message_cost |
| ip0 link del dev wg0 |
| ip0 link del dev wg1 |
| ip1 link del dev wg0 |
| ip1 link del dev wg1 |
| ip2 link del dev wg0 |
| 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 wg0 type wireguard |
| ip0 link set wg0 netns $netns1 |
| ip0 link add dev wg0 type wireguard |
| ip0 link set wg0 netns $netns2 |
| key1="$(pp wg genkey)" |
| key2="$(pp wg genkey)" |
| key3="$(pp wg genkey)" |
| key4="$(pp wg genkey)" |
| pub1="$(pp wg pubkey <<<"$key1")" |
| pub2="$(pp wg pubkey <<<"$key2")" |
| pub3="$(pp wg pubkey <<<"$key3")" |
| pub4="$(pp wg pubkey <<<"$key4")" |
| psk="$(pp wg genpsk)" |
| [[ -n $key1 && -n $key2 && -n $psk ]] |
| |
| configure_peers() { |
| ip1 addr add 192.168.241.1/24 dev wg0 |
| ip1 addr add fd00::1/112 dev wg0 |
| |
| ip2 addr add 192.168.241.2/24 dev wg0 |
| ip2 addr add fd00::2/112 dev wg0 |
| |
| n1 wg set wg0 \ |
| private-key <(echo "$key1") \ |
| listen-port 1 \ |
| peer "$pub2" \ |
| preshared-key <(echo "$psk") \ |
| allowed-ips 192.168.241.2/32,fd00::2/128 |
| n2 wg set wg0 \ |
| private-key <(echo "$key2") \ |
| listen-port 2 \ |
| peer "$pub1" \ |
| preshared-key <(echo "$psk") \ |
| allowed-ips 192.168.241.1/32,fd00::1/128 |
| |
| ip1 link set up dev wg0 |
| ip2 link set up dev wg0 |
| } |
| 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 -t 3 -c 192.168.241.2 |
| |
| # TCP over IPv6 |
| n1 iperf3 -s -1 -B fd00::1 & |
| waitiperf $netns1 $! |
| n2 iperf3 -Z -t 3 -c fd00::1 |
| |
| # UDP over IPv4 |
| n1 iperf3 -s -1 -B 192.168.241.1 & |
| waitiperf $netns1 $! |
| n2 iperf3 -Z -t 3 -b 0 -u -c 192.168.241.1 |
| |
| # UDP over IPv6 |
| n2 iperf3 -s -1 -B fd00::2 & |
| waitiperf $netns2 $! |
| n1 iperf3 -Z -t 3 -b 0 -u -c fd00::2 |
| |
| # TCP over IPv4, in parallel |
| local pids=( ) i |
| for ((i=0; i < NPROC; ++i)) do |
| n2 iperf3 -p $(( 5200 + i )) -s -1 -B 192.168.241.2 & |
| pids+=( $! ); waitiperf $netns2 $! $(( 5200 + i )) |
| done |
| for ((i=0; i < NPROC; ++i)) do |
| n1 iperf3 -Z -t 3 -p $(( 5200 + i )) -c 192.168.241.2 & |
| done |
| wait "${pids[@]}" |
| } |
| |
| [[ $(ip1 link show dev wg0) =~ mtu\ ([0-9]+) ]] && orig_mtu="${BASH_REMATCH[1]}" |
| big_mtu=$(( 34816 - 1500 + $orig_mtu )) |
| |
| # Test using IPv4 as outer transport |
| n1 wg set wg0 peer "$pub2" endpoint 127.0.0.1:2 |
| n2 wg set wg0 peer "$pub1" endpoint 127.0.0.1:1 |
| # Before calling tests, we first make sure that the stats counters and timestamper 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 wg0) |
| (( rx_bytes == 1372 && (tx_bytes == 1428 || tx_bytes == 1460) )) |
| { read _; read _; read _; read rx_bytes _; read _; read tx_bytes _; } < <(ip1 -stats link show dev wg0) |
| (( tx_bytes == 1372 && (rx_bytes == 1428 || rx_bytes == 1460) )) |
| read _ rx_bytes tx_bytes < <(n2 wg show wg0 transfer) |
| (( rx_bytes == 1372 && (tx_bytes == 1428 || tx_bytes == 1460) )) |
| read _ rx_bytes tx_bytes < <(n1 wg show wg0 transfer) |
| (( tx_bytes == 1372 && (rx_bytes == 1428 || rx_bytes == 1460) )) |
| read _ timestamp < <(n1 wg show wg0 latest-handshakes) |
| (( timestamp != 0 )) |
| |
| tests |
| ip1 link set wg0 mtu $big_mtu |
| ip2 link set wg0 mtu $big_mtu |
| tests |
| |
| ip1 link set wg0 mtu $orig_mtu |
| ip2 link set wg0 mtu $orig_mtu |
| |
| # Test using IPv6 as outer transport |
| n1 wg set wg0 peer "$pub2" endpoint [::1]:2 |
| n2 wg set wg0 peer "$pub1" endpoint [::1]:1 |
| tests |
| ip1 link set wg0 mtu $big_mtu |
| ip2 link set wg0 mtu $big_mtu |
| tests |
| |
| # Test that route MTUs work with the padding |
| ip1 link set wg0 mtu 1300 |
| ip2 link set wg0 mtu 1300 |
| n1 wg set wg0 peer "$pub2" endpoint 127.0.0.1:2 |
| n2 wg set wg0 peer "$pub1" endpoint 127.0.0.1:1 |
| n0 iptables -A INPUT -m length --length 1360 -j DROP |
| n1 ip route add 192.168.241.2/32 dev wg0 mtu 1299 |
| n2 ip route add 192.168.241.1/32 dev wg0 mtu 1299 |
| n2 ping -c 1 -W 1 -s 1269 192.168.241.1 |
| n2 ip route delete 192.168.241.1/32 dev wg0 mtu 1299 |
| n1 ip route delete 192.168.241.2/32 dev wg0 mtu 1299 |
| n0 iptables -F INPUT |
| |
| ip1 link set wg0 mtu $orig_mtu |
| ip2 link set wg0 mtu $orig_mtu |
| |
| # Test using IPv4 that roaming works |
| ip0 -4 addr del 127.0.0.1/8 dev lo |
| ip0 -4 addr add 127.212.121.99/8 dev lo |
| n1 wg set wg0 listen-port 9999 |
| n1 wg set wg0 peer "$pub2" endpoint 127.0.0.1:2 |
| n1 ping6 -W 1 -c 1 fd00::2 |
| [[ $(n2 wg show wg0 endpoints) == "$pub1 127.212.121.99:9999" ]] |
| |
| # Test using IPv6 that roaming works |
| n1 wg set wg0 listen-port 9998 |
| n1 wg set wg0 peer "$pub2" endpoint [::1]:2 |
| n1 ping -W 1 -c 1 192.168.241.2 |
| [[ $(n2 wg show wg0 endpoints) == "$pub1 [::1]:9998" ]] |
| |
| # Test that crypto-RP filter works |
| n1 wg set wg0 peer "$pub2" allowed-ips 192.168.241.0/24 |
| exec 4< <(n1 ncat -l -u -p 1111) |
| ncat_pid=$! |
| waitncatudp $netns1 $ncat_pid |
| n2 ncat -u 192.168.241.1 1111 <<<"X" |
| read -r -N 1 -t 1 out <&4 && [[ $out == "X" ]] |
| kill $ncat_pid |
| more_specific_key="$(pp wg genkey | pp wg pubkey)" |
| n1 wg set wg0 peer "$more_specific_key" allowed-ips 192.168.241.2/32 |
| n2 wg set wg0 listen-port 9997 |
| exec 4< <(n1 ncat -l -u -p 1111) |
| ncat_pid=$! |
| waitncatudp $netns1 $ncat_pid |
| n2 ncat -u 192.168.241.1 1111 <<<"X" |
| ! read -r -N 1 -t 1 out <&4 || false |
| kill $ncat_pid |
| n1 wg set wg0 peer "$more_specific_key" remove |
| [[ $(n1 wg show wg0 endpoints) == "$pub2 [::1]:9997" ]] |
| |
| # Test that we can change private keys keys and immediately handshake |
| n1 wg set wg0 private-key <(echo "$key1") peer "$pub2" preshared-key <(echo "$psk") allowed-ips 192.168.241.2/32 endpoint 127.0.0.1:2 |
| n2 wg set wg0 private-key <(echo "$key2") listen-port 2 peer "$pub1" preshared-key <(echo "$psk") allowed-ips 192.168.241.1/32 |
| n1 ping -W 1 -c 1 192.168.241.2 |
| n1 wg set wg0 private-key <(echo "$key3") |
| n2 wg set wg0 peer "$pub3" preshared-key <(echo "$psk") allowed-ips 192.168.241.1/32 peer "$pub1" remove |
| n1 ping -W 1 -c 1 192.168.241.2 |
| n2 wg set wg0 peer "$pub3" remove |
| |
| # Test that we can route wg through wg |
| ip1 addr flush dev wg0 |
| ip2 addr flush dev wg0 |
| ip1 addr add fd00::5:1/112 dev wg0 |
| ip2 addr add fd00::5:2/112 dev wg0 |
| n1 wg set wg0 private-key <(echo "$key1") peer "$pub2" preshared-key <(echo "$psk") allowed-ips fd00::5:2/128 endpoint 127.0.0.1:2 |
| n2 wg set wg0 private-key <(echo "$key2") listen-port 2 peer "$pub1" preshared-key <(echo "$psk") allowed-ips fd00::5:1/128 endpoint 127.212.121.99:9998 |
| ip1 link add wg1 type wireguard |
| ip2 link add wg1 type wireguard |
| ip1 addr add 192.168.241.1/24 dev wg1 |
| ip1 addr add fd00::1/112 dev wg1 |
| ip2 addr add 192.168.241.2/24 dev wg1 |
| ip2 addr add fd00::2/112 dev wg1 |
| ip1 link set mtu 1340 up dev wg1 |
| ip2 link set mtu 1340 up dev wg1 |
| n1 wg set wg1 listen-port 5 private-key <(echo "$key3") peer "$pub4" allowed-ips 192.168.241.2/32,fd00::2/128 endpoint [fd00::5:2]:5 |
| n2 wg set wg1 listen-port 5 private-key <(echo "$key4") peer "$pub3" allowed-ips 192.168.241.1/32,fd00::1/128 endpoint [fd00::5:1]:5 |
| tests |
| # Try to set up a routing loop between the two namespaces |
| ip1 link set netns $netns0 dev wg1 |
| ip0 addr add 192.168.241.1/24 dev wg1 |
| ip0 link set up dev wg1 |
| n0 ping -W 1 -c 1 192.168.241.2 |
| n1 wg set wg0 peer "$pub2" endpoint 192.168.241.2:7 |
| ip2 link del wg0 |
| ip2 link del wg1 |
| read _ _ tx_bytes_before < <(n0 wg show wg1 transfer) |
| ! n0 ping -W 1 -c 10 -f 192.168.241.2 || false |
| sleep 1 |
| read _ _ tx_bytes_after < <(n0 wg show wg1 transfer) |
| if ! (( tx_bytes_after - tx_bytes_before < 70000 )); then |
| errstart=$'\x1b[37m\x1b[41m\x1b[1m' |
| errend=$'\x1b[0m' |
| echo "${errstart} ${errend}" |
| echo "${errstart} E R R O R ${errend}" |
| echo "${errstart} ${errend}" |
| echo "${errstart} This architecture does not do the right thing ${errend}" |
| echo "${errstart} with cross-namespace routing loops. This test ${errend}" |
| echo "${errstart} has thus technically failed but, as this issue ${errend}" |
| echo "${errstart} is as yet unsolved, these tests will continue ${errend}" |
| echo "${errstart} onward. :( ${errend}" |
| echo "${errstart} ${errend}" |
| fi |
| |
| ip0 link del wg1 |
| ip1 link del wg0 |
| |
| # Test using NAT. We now change the topology to this: |
| # ┌────────────────────────────────────────┐ ┌────────────────────────────────────────────────┐ ┌────────────────────────────────────────┐ |
| # │ $ns1 namespace │ │ $ns0 namespace │ │ $ns2 namespace │ |
| # │ │ │ │ │ │ |
| # │ ┌─────┐ ┌─────┐ │ │ ┌──────┐ ┌──────┐ │ │ ┌─────┐ ┌─────┐ │ |
| # │ │ wg0 │─────────────│vethc│───────────┼────┼────│vethrc│ │vethrs│──────────────┼─────┼──│veths│────────────│ wg0 │ │ |
| # │ ├─────┴──────────┐ ├─────┴──────────┐│ │ ├──────┴─────────┐ ├──────┴────────────┐ │ │ ├─────┴──────────┐ ├─────┴──────────┐ │ |
| # │ │192.168.241.1/24│ │192.168.1.100/24││ │ │192.168.1.1/24 │ │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 wg0 type wireguard |
| ip2 link add dev wg0 type wireguard |
| 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 $netns2 veths |
| |
| n0 bash -c 'printf 1 > /proc/sys/net/ipv4/ip_forward' |
| n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout' |
| n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout_stream' |
| n0 iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -d 10.0.0.0/24 -j SNAT --to 10.0.0.1 |
| |
| n1 wg set wg0 peer "$pub2" endpoint 10.0.0.100:2 persistent-keepalive 1 |
| n1 ping -W 1 -c 1 192.168.241.2 |
| n2 ping -W 1 -c 1 192.168.241.1 |
| [[ $(n2 wg show wg0 endpoints) == "$pub1 10.0.0.1:1" ]] |
| # 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 |
| n1 wg set wg0 peer "$pub2" persistent-keepalive 0 |
| |
| # Test that sk_bound_dev_if works |
| n1 ping -I wg0 -c 1 -W 1 192.168.241.2 |
| # What about when the mark changes and the packet must be rerouted? |
| n1 iptables -t mangle -I OUTPUT -j MARK --set-xmark 1 |
| n1 ping -c 1 -W 1 192.168.241.2 # First the boring case |
| n1 ping -I wg0 -c 1 -W 1 192.168.241.2 # Then the sk_bound_dev_if case |
| n1 iptables -t mangle -D OUTPUT -j MARK --set-xmark 1 |
| |
| # Test that onion routing works, even when it loops |
| n1 wg set wg0 peer "$pub3" allowed-ips 192.168.242.2/32 endpoint 192.168.241.2:5 |
| ip1 addr add 192.168.242.1/24 dev wg0 |
| ip2 link add wg1 type wireguard |
| ip2 addr add 192.168.242.2/24 dev wg1 |
| n2 wg set wg1 private-key <(echo "$key3") listen-port 5 peer "$pub1" allowed-ips 192.168.242.1/32 |
| ip2 link set wg1 up |
| n1 ping -W 1 -c 1 192.168.242.2 |
| ip2 link del wg1 |
| n1 wg set wg0 peer "$pub3" endpoint 192.168.242.2:5 |
| ! n1 ping -W 1 -c 1 192.168.242.2 || false # Should not crash kernel |
| n1 wg set wg0 peer "$pub3" remove |
| ip1 addr del 192.168.242.1/24 dev wg0 |
| |
| # Do a wg-quick(8)-style policy routing for the default route, making sure vethc has a v6 address to tease out bugs. |
| ip1 -6 addr add fc00::9/96 dev vethc |
| ip1 -6 route add default via fc00::1 |
| ip2 -4 addr add 192.168.99.7/32 dev wg0 |
| ip2 -6 addr add abab::1111/128 dev wg0 |
| n1 wg set wg0 fwmark 51820 peer "$pub2" allowed-ips 192.168.99.7,abab::1111 |
| ip1 -6 route add default dev wg0 table 51820 |
| ip1 -6 rule add not fwmark 51820 table 51820 |
| ip1 -6 rule add table main suppress_prefixlength 0 |
| ip1 -4 route add default dev wg0 table 51820 |
| ip1 -4 rule add not fwmark 51820 table 51820 |
| ip1 -4 rule add table main suppress_prefixlength 0 |
| n1 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/vethc/rp_filter' |
| # Flood the pings instead of sending just one, to trigger routing table reference counting bugs. |
| n1 ping -W 1 -c 100 -f 192.168.99.7 |
| n1 ping -W 1 -c 100 -f abab::1111 |
| |
| # Have ns2 NAT into wg0 packets from ns0, but return an icmp error along the right route. |
| n2 iptables -t nat -A POSTROUTING -s 10.0.0.0/24 -d 192.168.241.0/24 -j SNAT --to 192.168.241.2 |
| n0 iptables -t filter -A INPUT \! -s 10.0.0.0/24 -i vethrs -j DROP # Manual rpfilter just to be explicit. |
| n2 bash -c 'printf 1 > /proc/sys/net/ipv4/ip_forward' |
| ip0 -4 route add 192.168.241.1 via 10.0.0.100 |
| n2 wg set wg0 peer "$pub1" remove |
| [[ $(! n0 ping -W 1 -c 1 192.168.241.1 || false) == *"From 10.0.0.100 icmp_seq=1 Destination Host Unreachable"* ]] |
| |
| n0 iptables -t nat -F |
| n0 iptables -t filter -F |
| n2 iptables -t nat -F |
| ip0 link del vethrc |
| ip0 link del vethrs |
| ip1 link del wg0 |
| ip2 link del wg0 |
| |
| # Test that saddr routing is sticky but not too sticky, changing to this topology: |
| # ┌────────────────────────────────────────┐ ┌────────────────────────────────────────┐ |
| # │ $ns1 namespace │ │ $ns2 namespace │ |
| # │ │ │ │ |
| # │ ┌─────┐ ┌─────┐ │ │ ┌─────┐ ┌─────┐ │ |
| # │ │ wg0 │─────────────│veth1│───────────┼────┼──│veth2│────────────│ wg0 │ │ |
| # │ ├─────┴──────────┐ ├─────┴──────────┐│ │ ├─────┴──────────┐ ├─────┴──────────┐ │ |
| # │ │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 wg0 type wireguard |
| ip2 link add dev wg0 type wireguard |
| 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/all/accept_dad' |
| n2 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/all/accept_dad' |
| 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 $netns2 veth2 |
| n1 wg set wg0 peer "$pub2" endpoint 10.0.0.2:2 |
| 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 |
| n1 wg set wg0 peer "$pub2" endpoint [fd00:aa::2]:2 |
| 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 $netns2 veth2 |
| n2 wg set wg0 peer "$pub1" endpoint 10.0.0.1:1 |
| n2 ping -W 1 -c 1 192.168.241.1 |
| [[ $(n2 wg show wg0 endpoints) == "$pub1 10.0.0.1:1" ]] |
| n2 wg set wg0 peer "$pub1" endpoint [fd00:aa::1]:1 |
| n2 ping -W 1 -c 1 192.168.241.1 |
| [[ $(n2 wg show wg0 endpoints) == "$pub1 [fd00:aa::1]:1" ]] |
| n2 wg set wg0 peer "$pub1" endpoint 10.0.0.2:1 |
| n2 ping -W 1 -c 1 192.168.241.1 |
| [[ $(n2 wg show wg0 endpoints) == "$pub1 10.0.0.2:1" ]] |
| n2 wg set wg0 peer "$pub1" endpoint [fd00:aa::2]:1 |
| n2 ping -W 1 -c 1 192.168.241.1 |
| [[ $(n2 wg show wg0 endpoints) == "$pub1 [fd00:aa::2]:1" ]] |
| |
| # What happens if the inbound destination address belongs to a different interface as the default route? |
| ip1 link add dummy0 type dummy |
| ip1 addr add 10.50.0.1/24 dev dummy0 |
| ip1 link set dummy0 up |
| ip2 route add 10.50.0.0/24 dev veth2 |
| n2 wg set wg0 peer "$pub1" endpoint 10.50.0.1:1 |
| n2 ping -W 1 -c 1 192.168.241.1 |
| [[ $(n2 wg show wg0 endpoints) == "$pub1 10.50.0.1:1" ]] |
| |
| ip1 link del dummy0 |
| ip1 addr flush dev veth1 |
| ip2 addr flush dev veth2 |
| ip1 route flush dev veth1 |
| ip2 route flush dev veth2 |
| |
| # Now we see what happens if another interface route takes precedence over an ongoing one |
| ip1 link add veth3 type veth peer name veth4 |
| ip1 link set veth4 netns $netns2 |
| ip1 addr add 10.0.0.1/24 dev veth1 |
| ip2 addr add 10.0.0.2/24 dev veth2 |
| ip1 addr add 10.0.0.3/24 dev veth3 |
| ip1 link set veth1 up |
| ip2 link set veth2 up |
| ip1 link set veth3 up |
| ip2 link set veth4 up |
| waitiface $netns1 veth1 |
| waitiface $netns2 veth2 |
| waitiface $netns1 veth3 |
| waitiface $netns2 veth4 |
| ip1 route flush dev veth1 |
| ip1 route flush dev veth3 |
| ip1 route add 10.0.0.0/24 dev veth1 src 10.0.0.1 metric 2 |
| n1 wg set wg0 peer "$pub2" endpoint 10.0.0.2:2 |
| n1 ping -W 1 -c 1 192.168.241.2 |
| [[ $(n2 wg show wg0 endpoints) == "$pub1 10.0.0.1:1" ]] |
| ip1 route add 10.0.0.0/24 dev veth3 src 10.0.0.3 metric 1 |
| n1 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/veth1/rp_filter' |
| n2 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/veth4/rp_filter' |
| n1 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/all/rp_filter' |
| n2 bash -c 'printf 0 > /proc/sys/net/ipv4/conf/all/rp_filter' |
| n1 ping -W 1 -c 1 192.168.241.2 |
| [[ $(n2 wg show wg0 endpoints) == "$pub1 10.0.0.3:1" ]] |
| |
| ip1 link del veth1 |
| ip1 link del veth3 |
| ip1 link del wg0 |
| ip2 link del wg0 |
| |
| # We test that Netlink/IPC is working properly by doing things that usually cause split responses |
| ip0 link add dev wg0 type wireguard |
| config=( "[Interface]" "PrivateKey=$(wg genkey)" "[Peer]" "PublicKey=$(wg genkey)" ) |
| for a in {1..255}; do |
| for b in {0..255}; do |
| config+=( "AllowedIPs=$a.$b.0.0/16,$a::$b/128" ) |
| done |
| done |
| n0 wg setconf wg0 <(printf '%s\n' "${config[@]}") |
| i=0 |
| for ip in $(n0 wg show wg0 allowed-ips); do |
| ((++i)) |
| done |
| ((i == 255*256*2+1)) |
| ip0 link del wg0 |
| ip0 link add dev wg0 type wireguard |
| config=( "[Interface]" "PrivateKey=$(wg genkey)" ) |
| for a in {1..40}; do |
| config+=( "[Peer]" "PublicKey=$(wg genkey)" ) |
| for b in {1..52}; do |
| config+=( "AllowedIPs=$a.$b.0.0/16" ) |
| done |
| done |
| n0 wg setconf wg0 <(printf '%s\n' "${config[@]}") |
| i=0 |
| while read -r line; do |
| j=0 |
| for ip in $line; do |
| ((++j)) |
| done |
| ((j == 53)) |
| ((++i)) |
| done < <(n0 wg show wg0 allowed-ips) |
| ((i == 40)) |
| ip0 link del wg0 |
| ip0 link add wg0 type wireguard |
| config=( ) |
| for i in {1..29}; do |
| config+=( "[Peer]" "PublicKey=$(wg genkey)" ) |
| done |
| config+=( "[Peer]" "PublicKey=$(wg genkey)" "AllowedIPs=255.2.3.4/32,abcd::255/128" ) |
| n0 wg setconf wg0 <(printf '%s\n' "${config[@]}") |
| n0 wg showconf wg0 > /dev/null |
| ip0 link del wg0 |
| |
| allowedips=( ) |
| for i in {1..197}; do |
| allowedips+=( abcd::$i ) |
| done |
| saved_ifs="$IFS" |
| IFS=, |
| allowedips="${allowedips[*]}" |
| IFS="$saved_ifs" |
| ip0 link add wg0 type wireguard |
| n0 wg set wg0 peer "$pub1" |
| n0 wg set wg0 peer "$pub2" allowed-ips "$allowedips" |
| { |
| read -r pub allowedips |
| [[ $pub == "$pub1" && $allowedips == "(none)" ]] |
| read -r pub allowedips |
| [[ $pub == "$pub2" ]] |
| i=0 |
| for _ in $allowedips; do |
| ((++i)) |
| done |
| ((i == 197)) |
| } < <(n0 wg show wg0 allowed-ips) |
| ip0 link del wg0 |
| |
| ! n0 wg show doesnotexist || false |
| |
| ip0 link add wg0 type wireguard |
| n0 wg set wg0 private-key <(echo "$key1") peer "$pub2" preshared-key <(echo "$psk") |
| [[ $(n0 wg show wg0 private-key) == "$key1" ]] |
| [[ $(n0 wg show wg0 preshared-keys) == "$pub2 $psk" ]] |
| n0 wg set wg0 private-key /dev/null peer "$pub2" preshared-key /dev/null |
| [[ $(n0 wg show wg0 private-key) == "(none)" ]] |
| [[ $(n0 wg show wg0 preshared-keys) == "$pub2 (none)" ]] |
| n0 wg set wg0 peer "$pub2" |
| n0 wg set wg0 private-key <(echo "$key2") |
| [[ $(n0 wg show wg0 public-key) == "$pub2" ]] |
| [[ -z $(n0 wg show wg0 peers) ]] |
| n0 wg set wg0 peer "$pub2" |
| [[ -z $(n0 wg show wg0 peers) ]] |
| n0 wg set wg0 private-key <(echo "$key1") |
| n0 wg set wg0 peer "$pub2" |
| [[ $(n0 wg show wg0 peers) == "$pub2" ]] |
| n0 wg set wg0 private-key <(echo "/${key1:1}") |
| [[ $(n0 wg show wg0 private-key) == "+${key1:1}" ]] |
| n0 wg set wg0 peer "$pub2" allowed-ips 0.0.0.0/0,10.0.0.0/8,100.0.0.0/10,172.16.0.0/12,192.168.0.0/16 |
| n0 wg set wg0 peer "$pub2" allowed-ips 0.0.0.0/0 |
| n0 wg set wg0 peer "$pub2" allowed-ips ::/0,1700::/111,5000::/4,e000::/37,9000::/75 |
| n0 wg set wg0 peer "$pub2" allowed-ips ::/0 |
| n0 wg set wg0 peer "$pub2" remove |
| for low_order_point in AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA= AQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA= 4Ot6fDtBuK4WVuP68Z/EatoJjeucMrH9hmIFFl9JuAA= X5yVvKNQjCSx0LFVnIPvWwREXMRYHI6G2CJO3dCfEVc= 7P///////////////////////////////////////38= 7f///////////////////////////////////////38= 7v///////////////////////////////////////38=; do |
| n0 wg set wg0 peer "$low_order_point" persistent-keepalive 1 endpoint 127.0.0.1:1111 |
| done |
| [[ -n $(n0 wg show wg0 peers) ]] |
| exec 4< <(n0 ncat -l -u -p 1111) |
| ncat_pid=$! |
| waitncatudp $netns0 $ncat_pid |
| ip0 link set wg0 up |
| ! read -r -n 1 -t 2 <&4 || false |
| kill $ncat_pid |
| ip0 link del wg0 |
| |
| # Ensure that dst_cache references don't outlive netns lifetime |
| ip1 link add dev wg0 type wireguard |
| ip2 link add dev wg0 type wireguard |
| configure_peers |
| ip1 link add veth1 type veth peer name veth2 |
| ip1 link set veth2 netns $netns2 |
| ip1 addr add fd00:aa::1/64 dev veth1 |
| ip2 addr add fd00:aa::2/64 dev veth2 |
| ip1 link set veth1 up |
| ip2 link set veth2 up |
| waitiface $netns1 veth1 |
| waitiface $netns2 veth2 |
| ip1 -6 route add default dev veth1 via fd00:aa::2 |
| ip2 -6 route add default dev veth2 via fd00:aa::1 |
| n1 wg set wg0 peer "$pub2" endpoint [fd00:aa::2]:2 |
| n2 wg set wg0 peer "$pub1" endpoint [fd00:aa::1]:1 |
| n1 ping6 -c 1 fd00::2 |
| pp ip netns delete $netns1 |
| pp ip netns delete $netns2 |
| pp ip netns add $netns1 |
| pp ip netns add $netns2 |
| |
| # Ensure there aren't circular reference loops |
| ip1 link add wg1 type wireguard |
| ip2 link add wg2 type wireguard |
| ip1 link set wg1 netns $netns2 |
| ip2 link set wg2 netns $netns1 |
| pp ip netns delete $netns1 |
| pp ip netns delete $netns2 |
| pp ip netns add $netns1 |
| pp ip netns add $netns2 |
| |
| sleep 2 # Wait for cleanup and grace periods |
| declare -A objects |
| while read -t 0.1 -r line 2>/dev/null || [[ $? -ne 142 ]]; do |
| [[ $line =~ .*(wg[0-9]+:\ [A-Z][a-z]+\ ?[0-9]*)\ .*(created|destroyed).* ]] || continue |
| objects["${BASH_REMATCH[1]}"]+="${BASH_REMATCH[2]}" |
| done < /dev/kmsg |
| alldeleted=1 |
| for object in "${!objects[@]}"; do |
| if [[ ${objects["$object"]} != *createddestroyed && ${objects["$object"]} != *createdcreateddestroyeddestroyed ]]; then |
| echo "Error: $object: merely ${objects["$object"]}" >&3 |
| alldeleted=0 |
| fi |
| done |
| [[ $alldeleted -eq 1 ]] |
| pretty "" "Objects that were created were also destroyed." |
