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| -rwxr-xr-x | netns.sh | 428 |
1 files changed, 428 insertions, 0 deletions
diff --git a/netns.sh b/netns.sh new file mode 100755 index 0000000..54b58c9 --- /dev/null +++ b/netns.sh @@ -0,0 +1,428 @@ +#!/bin/bash + +# Copyright (C) 2015-2017 Jason A. Donenfeld <Jason@zx2c4.com>. 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. + +# This code is ported to the WireGuard-Rust directly from the kernel project. +# +# Please ensure that you have installed the newest version of the WireGuard +# tools from the WireGuard project and before running these tests as: +# +# ./netns.sh <path to wireguard-rs> + +set -e + +exec 3>&1 +export WG_HIDE_KEYS=never +netns0="wg-test-$$-0" +netns1="wg-test-$$-1" +netns2="wg-test-$$-2" +program=$1 +export RUST_LOG="trace" + +pretty() { echo -e "\x1b[32m\x1b[1m[+] ${1:+NS$1: }${2}\x1b[0m" >&3; } +pp() { pretty "" "$*"; "$@"; } +maybe_exec() { if [[ $BASHPID -eq $$ ]]; 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/$2/operstate\") != up ]]; do read -t .1 -N 0 || true; done;"; } + +cleanup() { + set +e + exec 2>/dev/null + printf "$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 wg1 +ip0 link set wg1 netns $netns1 + +# ip0 link add dev wg1 type wireguard +n0 $program wg2 +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 + sleep 1 + echo "ready" +} +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 + +# 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) +ip2 -stats link show dev wg2 +n0 wg show +[[ $rx_bytes -ge 840 && $tx_bytes -ge 880 && $rx_bytes -lt 2500 && $rx_bytes -lt 2500 ]] +echo "counters working" +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::2 +[[ $(n2 wg show wg2 endpoints) == "$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 wg2 + +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 + +# Test that Netlink/IPC is working properly by doing things that usually cause split responses + +n0 $program wg0 +sleep 5 +config=( "[Interface]" "PrivateKey=$(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 + +n0 $program wg0 +config=( "[Interface]" "PrivateKey=$(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 + +n0 $program wg0 +config=( ) +for i in {1..29}; do + config+=( "[Peer]" "PublicKey=$(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 + +! n0 wg show doesnotexist || false + +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 ]]; then + echo "Error: $object: merely ${objects["$object"]}" >&3 + alldeleted=0 + fi +done +[[ $alldeleted -eq 1 ]] +pretty "" "Objects that were created were also destroyed." |