353 lines
16 KiB
Bash
Executable file
353 lines
16 KiB
Bash
Executable file
#!/bin/bash
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# Copyright (C) 2015-2017 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
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# This script tests the below topology:
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#
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# ┌─────────────────────┐ ┌──────────────────────────────────┐ ┌─────────────────────┐
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# │ $ns1 namespace │ │ $ns0 namespace │ │ $ns2 namespace │
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# │ │ │ │ │ │
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# │┌────────┐ │ │ ┌────────┐ │ │ ┌────────┐│
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# ││ wg1 │───────────┼───┼────────────│ lo │────────────┼───┼───────────│ wg2 ││
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# │├────────┴──────────┐│ │ ┌───────┴────────┴────────┐ │ │┌──────────┴────────┤│
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# ││192.168.241.1/24 ││ │ │(ns1) (ns2) │ │ ││192.168.241.2/24 ││
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# ││fd00::1/24 ││ │ │127.0.0.1:1 127.0.0.1:2│ │ ││fd00::2/24 ││
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# │└───────────────────┘│ │ │[::]:1 [::]:2 │ │ │└───────────────────┘│
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# └─────────────────────┘ │ └─────────────────────────┘ │ └─────────────────────┘
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# └──────────────────────────────────┘
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#
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# After the topology is prepared we run a series of TCP/UDP iperf3 tests between the
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# wireguard peers in $ns1 and $ns2. Note that $ns0 is the endpoint for the wg1
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# interfaces in $ns1 and $ns2. See https://www.wireguard.com/netns/ for further
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# details on how this is accomplished.
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set -e
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exec 3>&1
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export WG_HIDE_KEYS=never
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netns0="wg-test-$$-0"
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netns1="wg-test-$$-1"
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netns2="wg-test-$$-2"
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program="../wireguard-go"
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export LOG_LEVEL="info"
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pretty() { echo -e "\x1b[32m\x1b[1m[+] ${1:+NS$1: }${2}\x1b[0m" >&3; }
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pp() { pretty "" "$*"; "$@"; }
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maybe_exec() { if [[ $BASHPID -eq $$ ]]; then "$@"; else exec "$@"; fi; }
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n0() { pretty 0 "$*"; maybe_exec ip netns exec $netns0 "$@"; }
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n1() { pretty 1 "$*"; maybe_exec ip netns exec $netns1 "$@"; }
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n2() { pretty 2 "$*"; maybe_exec ip netns exec $netns2 "$@"; }
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ip0() { pretty 0 "ip $*"; ip -n $netns0 "$@"; }
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ip1() { pretty 1 "ip $*"; ip -n $netns1 "$@"; }
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ip2() { pretty 2 "ip $*"; ip -n $netns2 "$@"; }
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sleep() { read -t "$1" -N 0 || true; }
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waitiperf() { pretty "${1//*-}" "wait for iperf:5201"; while [[ $(ss -N "$1" -tlp 'sport = 5201') != *iperf3* ]]; do sleep 0.1; done; }
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waitncatudp() { pretty "${1//*-}" "wait for udp:1111"; while [[ $(ss -N "$1" -ulp 'sport = 1111') != *ncat* ]]; do sleep 0.1; done; }
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waitiface() { pretty "${1//*-}" "wait for $2 to come up"; ip netns exec "$1" bash -c "while [[ \$(< \"/sys/class/net/$2/operstate\") != up ]]; do read -t .1 -N 0 || true; done;"; }
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cleanup() {
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set +e
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exec 2>/dev/null
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printf "$orig_message_cost" > /proc/sys/net/core/message_cost
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ip0 link del dev wg1
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ip1 link del dev wg1
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ip2 link del dev wg1
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local to_kill="$(ip netns pids $netns0) $(ip netns pids $netns1) $(ip netns pids $netns2)"
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[[ -n $to_kill ]] && kill $to_kill
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pp ip netns del $netns1
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pp ip netns del $netns2
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pp ip netns del $netns0
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exit
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}
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orig_message_cost="$(< /proc/sys/net/core/message_cost)"
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trap cleanup EXIT
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printf 0 > /proc/sys/net/core/message_cost
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ip netns del $netns0 2>/dev/null || true
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ip netns del $netns1 2>/dev/null || true
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ip netns del $netns2 2>/dev/null || true
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pp ip netns add $netns0
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pp ip netns add $netns1
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pp ip netns add $netns2
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ip0 link set up dev lo
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# ip0 link add dev wg1 type wireguard
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n0 $program wg1
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ip0 link set wg1 netns $netns1
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# ip0 link add dev wg1 type wireguard
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n0 $program wg2
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ip0 link set wg2 netns $netns2
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key1="$(pp wg genkey)"
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key2="$(pp wg genkey)"
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pub1="$(pp wg pubkey <<<"$key1")"
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pub2="$(pp wg pubkey <<<"$key2")"
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psk="$(pp wg genpsk)"
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[[ -n $key1 && -n $key2 && -n $psk ]]
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configure_peers() {
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ip1 addr add 192.168.241.1/24 dev wg1
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ip1 addr add fd00::1/24 dev wg1
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ip2 addr add 192.168.241.2/24 dev wg2
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ip2 addr add fd00::2/24 dev wg2
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n0 wg set wg1 \
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private-key <(echo "$key1") \
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listen-port 10000 \
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peer "$pub2" \
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preshared-key <(echo "$psk") \
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allowed-ips 192.168.241.2/32,fd00::2/128
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n0 wg set wg2 \
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private-key <(echo "$key2") \
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listen-port 20000 \
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peer "$pub1" \
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preshared-key <(echo "$psk") \
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allowed-ips 192.168.241.1/32,fd00::1/128
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n0 wg showconf wg1
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n0 wg showconf wg2
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ip1 link set up dev wg1
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ip2 link set up dev wg2
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}
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configure_peers
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tests() {
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# Ping over IPv4
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n2 ping -c 10 -f -W 1 192.168.241.1
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n1 ping -c 10 -f -W 1 192.168.241.2
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# Ping over IPv6
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n2 ping6 -c 10 -f -W 1 fd00::1
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n1 ping6 -c 10 -f -W 1 fd00::2
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# TCP over IPv4
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n2 iperf3 -s -1 -B 192.168.241.2 &
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waitiperf $netns2
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n1 iperf3 -Z -n 1G -c 192.168.241.2
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# TCP over IPv6
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n1 iperf3 -s -1 -B fd00::1 &
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waitiperf $netns1
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n2 iperf3 -Z -n 1G -c fd00::1
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# UDP over IPv4
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n1 iperf3 -s -1 -B 192.168.241.1 &
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waitiperf $netns1
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n2 iperf3 -Z -n 1G -b 0 -u -c 192.168.241.1
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# UDP over IPv6
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n2 iperf3 -s -1 -B fd00::2 &
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waitiperf $netns2
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n1 iperf3 -Z -n 1G -b 0 -u -c fd00::2
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}
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[[ $(ip1 link show dev wg1) =~ mtu\ ([0-9]+) ]] && orig_mtu="${BASH_REMATCH[1]}"
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big_mtu=$(( 34816 - 1500 + $orig_mtu ))
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# Test using IPv4 as outer transport
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n0 wg set wg1 peer "$pub2" endpoint 127.0.0.1:20000
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n0 wg set wg2 peer "$pub1" endpoint 127.0.0.1:10000
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# Before calling tests, we first make sure that the stats counters are working
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n2 ping -c 10 -f -W 1 192.168.241.1
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{ read _; read _; read _; read rx_bytes _; read _; read tx_bytes _; } < <(ip2 -stats link show dev wg2)
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ip2 -stats link show dev wg2
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n0 wg show
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[[ $rx_bytes -ge 840 && $tx_bytes -ge 880 && $rx_bytes -lt 2500 && $rx_bytes -lt 2500 ]]
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echo "counters working"
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tests
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ip1 link set wg1 mtu $big_mtu
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ip2 link set wg2 mtu $big_mtu
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tests
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ip1 link set wg1 mtu $orig_mtu
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ip2 link set wg2 mtu $orig_mtu
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# Test using IPv6 as outer transport
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n0 wg set wg1 peer "$pub2" endpoint [::1]:20000
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n0 wg set wg2 peer "$pub1" endpoint [::1]:10000
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tests
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ip1 link set wg1 mtu $big_mtu
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ip2 link set wg2 mtu $big_mtu
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tests
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ip1 link set wg1 mtu $orig_mtu
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ip2 link set wg2 mtu $orig_mtu
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# Test using IPv4 that roaming works
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ip0 -4 addr del 127.0.0.1/8 dev lo
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ip0 -4 addr add 127.212.121.99/8 dev lo
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n0 wg set wg1 listen-port 9999
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n0 wg set wg1 peer "$pub2" endpoint 127.0.0.1:20000
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n1 ping6 -W 1 -c 1 fd00::2
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[[ $(n2 wg show wg2 endpoints) == "$pub1 127.212.121.99:9999" ]]
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# Test using IPv6 that roaming works
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n1 wg set wg1 listen-port 9998
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n1 wg set wg1 peer "$pub2" endpoint [::1]:20000
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n1 ping -W 1 -c 1 192.168.241.2
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[[ $(n2 wg show wg2 endpoints) == "$pub1 [::1]:9998" ]]
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# Test that crypto-RP filter works
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n1 wg set wg1 peer "$pub2" allowed-ips 192.168.241.0/24
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exec 4< <(n1 ncat -l -u -p 1111)
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nmap_pid=$!
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waitncatudp $netns1
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n2 ncat -u 192.168.241.1 1111 <<<"X"
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read -r -N 1 -t 1 out <&4 && [[ $out == "X" ]]
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kill $nmap_pid
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more_specific_key="$(pp wg genkey | pp wg pubkey)"
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n0 wg set wg1 peer "$more_specific_key" allowed-ips 192.168.241.2/32
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n0 wg set wg2 listen-port 9997
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exec 4< <(n1 ncat -l -u -p 1111)
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nmap_pid=$!
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waitncatudp $netns1
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n2 ncat -u 192.168.241.1 1111 <<<"X"
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! read -r -N 1 -t 1 out <&4
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kill $nmap_pid
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n0 wg set wg1 peer "$more_specific_key" remove
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[[ $(n1 wg show wg1 endpoints) == "$pub2 [::1]:9997" ]]
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ip1 link del wg1
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ip2 link del wg2
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# Test using NAT. We now change the topology to this:
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# ┌────────────────────────────────────────┐ ┌────────────────────────────────────────────────┐ ┌────────────────────────────────────────┐
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# │ $ns1 namespace │ │ $ns0 namespace │ │ $ns2 namespace │
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# │ │ │ │ │ │
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# │ ┌─────┐ ┌─────┐ │ │ ┌──────┐ ┌──────┐ │ │ ┌─────┐ ┌─────┐ │
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# │ │ wg1 │─────────────│vethc│───────────┼────┼────│vethrc│ │vethrs│──────────────┼─────┼──│veths│────────────│ wg2 │ │
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# │ ├─────┴──────────┐ ├─────┴──────────┐│ │ ├──────┴─────────┐ ├──────┴────────────┐ │ │ ├─────┴──────────┐ ├─────┴──────────┐ │
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# │ │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│ │
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# │ │fd00::1/24 │ │ ││ │ │ │ │SNAT:192.168.1.0/24│ │ │ │ │ │fd00::2/24 │ │
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# │ └────────────────┘ └────────────────┘│ │ └────────────────┘ └───────────────────┘ │ │ └────────────────┘ └────────────────┘ │
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# └────────────────────────────────────────┘ └────────────────────────────────────────────────┘ └────────────────────────────────────────┘
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# ip1 link add dev wg1 type wireguard
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# ip2 link add dev wg1 type wireguard
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n1 $program wg1
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n2 $program wg2
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configure_peers
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ip0 link add vethrc type veth peer name vethc
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ip0 link add vethrs type veth peer name veths
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ip0 link set vethc netns $netns1
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ip0 link set veths netns $netns2
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ip0 link set vethrc up
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ip0 link set vethrs up
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ip0 addr add 192.168.1.1/24 dev vethrc
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ip0 addr add 10.0.0.1/24 dev vethrs
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ip1 addr add 192.168.1.100/24 dev vethc
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ip1 link set vethc up
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ip1 route add default via 192.168.1.1
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ip2 addr add 10.0.0.100/24 dev veths
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ip2 link set veths up
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waitiface $netns0 vethrc
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waitiface $netns0 vethrs
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waitiface $netns1 vethc
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waitiface $netns2 veths
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n0 bash -c 'printf 1 > /proc/sys/net/ipv4/ip_forward'
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n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout'
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n0 bash -c 'printf 2 > /proc/sys/net/netfilter/nf_conntrack_udp_timeout_stream'
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n0 iptables -t nat -A POSTROUTING -s 192.168.1.0/24 -d 10.0.0.0/24 -j SNAT --to 10.0.0.1
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n0 wg set wg1 peer "$pub2" endpoint 10.0.0.100:20000 persistent-keepalive 1
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n1 ping -W 1 -c 1 192.168.241.2
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n2 ping -W 1 -c 1 192.168.241.1
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[[ $(n2 wg show wg2 endpoints) == "$pub1 10.0.0.1:10000" ]]
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# Demonstrate n2 can still send packets to n1, since persistent-keepalive will prevent connection tracking entry from expiring (to see entries: `n0 conntrack -L`).
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pp sleep 3
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n2 ping -W 1 -c 1 192.168.241.1
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n0 iptables -t nat -F
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ip0 link del vethrc
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ip0 link del vethrs
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ip1 link del wg1
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ip2 link del wg2
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# Test that saddr routing is sticky but not too sticky, changing to this topology:
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# ┌────────────────────────────────────────┐ ┌────────────────────────────────────────┐
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# │ $ns1 namespace │ │ $ns2 namespace │
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# │ │ │ │
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# │ ┌─────┐ ┌─────┐ │ │ ┌─────┐ ┌─────┐ │
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# │ │ wg1 │─────────────│veth1│───────────┼────┼──│veth2│────────────│ wg2 │ │
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# │ ├─────┴──────────┐ ├─────┴──────────┐│ │ ├─────┴──────────┐ ├─────┴──────────┐ │
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# │ │192.168.241.1/24│ │10.0.0.1/24 ││ │ │10.0.0.2/24 │ │192.168.241.2/24│ │
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# │ │fd00::1/24 │ │fd00:aa::1/96 ││ │ │fd00:aa::2/96 │ │fd00::2/24 │ │
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# │ └────────────────┘ └────────────────┘│ │ └────────────────┘ └────────────────┘ │
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# └────────────────────────────────────────┘ └────────────────────────────────────────┘
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# ip1 link add dev wg1 type wireguard
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# ip2 link add dev wg1 type wireguard
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n1 $program wg1
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n2 $program wg2
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configure_peers
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ip1 link add veth1 type veth peer name veth2
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ip1 link set veth2 netns $netns2
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n1 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/veth1/accept_dad'
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n2 bash -c 'printf 0 > /proc/sys/net/ipv6/conf/veth2/accept_dad'
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n1 bash -c 'printf 1 > /proc/sys/net/ipv4/conf/veth1/promote_secondaries'
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# First we check that we aren't overly sticky and can fall over to new IPs when old ones are removed
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ip1 addr add 10.0.0.1/24 dev veth1
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ip1 addr add fd00:aa::1/96 dev veth1
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ip2 addr add 10.0.0.2/24 dev veth2
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ip2 addr add fd00:aa::2/96 dev veth2
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ip1 link set veth1 up
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ip2 link set veth2 up
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waitiface $netns1 veth1
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waitiface $netns2 veth2
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n0 wg set wg1 peer "$pub2" endpoint 10.0.0.2:20000
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n1 ping -W 1 -c 1 192.168.241.2
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ip1 addr add 10.0.0.10/24 dev veth1
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ip1 addr del 10.0.0.1/24 dev veth1
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n1 ping -W 1 -c 1 192.168.241.2
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n0 wg set wg1 peer "$pub2" endpoint [fd00:aa::2]:20000
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n1 ping -W 1 -c 1 192.168.241.2
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ip1 addr add fd00:aa::10/96 dev veth1
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ip1 addr del fd00:aa::1/96 dev veth1
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n1 ping -W 1 -c 1 192.168.241.2
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# Now we show that we can successfully do reply to sender routing
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ip1 link set veth1 down
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ip2 link set veth2 down
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ip1 addr flush dev veth1
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ip2 addr flush dev veth2
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ip1 addr add 10.0.0.1/24 dev veth1
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ip1 addr add 10.0.0.2/24 dev veth1
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ip1 addr add fd00:aa::1/96 dev veth1
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ip1 addr add fd00:aa::2/96 dev veth1
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ip2 addr add 10.0.0.3/24 dev veth2
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ip2 addr add fd00:aa::3/96 dev veth2
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ip1 link set veth1 up
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ip2 link set veth2 up
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waitiface $netns1 veth1
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waitiface $netns2 veth2
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n0 wg set wg2 peer "$pub1" endpoint 10.0.0.1:10000
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n2 ping -W 1 -c 1 192.168.241.1
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[[ $(n0 wg show wg2 endpoints) == "$pub1 10.0.0.1:10000" ]]
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n0 wg set wg2 peer "$pub1" endpoint [fd00:aa::1]:10000
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n2 ping -W 1 -c 1 192.168.241.1
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[[ $(n0 wg show wg2 endpoints) == "$pub1 [fd00:aa::1]:10000" ]]
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n0 wg set wg2 peer "$pub1" endpoint 10.0.0.2:10000
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n2 ping -W 1 -c 1 192.168.241.1
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[[ $(n0 wg show wg2 endpoints) == "$pub1 10.0.0.2:10000" ]]
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n0 wg set wg2 peer "$pub1" endpoint [fd00:aa::2]:10000
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n2 ping -W 1 -c 1 192.168.241.1
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[[ $(n0 wg show wg2 endpoints) == "$pub1 [fd00:aa::2]:10000" ]]
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ip1 link del veth1
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ip1 link del wg1
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ip2 link del wg2
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echo "done"
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