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459262326e
kilo/pkg/mesh/topology_test.go
Lucas Servén Marín 35390054ba
pkg: deduplicate peer IP addresses 
We need to defensively deduplicate peer allowed IPs.
If two peers claim the same IP, the WireGuard configuration
could flap, causing the interface to churn.
2019-05-10 02:07:42 +02:00

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// Copyright 2019 the Kilo authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package mesh
import (
"net"
"strings"
"testing"
"github.com/kylelemons/godebug/pretty"
"github.com/squat/kilo/pkg/wireguard"
"github.com/vishvananda/netlink"
"golang.org/x/sys/unix"
)
func allowedIPs(ips ...string) string {
return strings.Join(ips, ", ")
}
func setup(t *testing.T) (map[string]*Node, map[string]*Peer, []byte, uint32) {
key := []byte("private")
e1 := &net.IPNet{IP: net.ParseIP("10.1.0.1").To4(), Mask: net.CIDRMask(16, 32)}
e2 := &net.IPNet{IP: net.ParseIP("10.1.0.2").To4(), Mask: net.CIDRMask(16, 32)}
e3 := &net.IPNet{IP: net.ParseIP("10.1.0.3").To4(), Mask: net.CIDRMask(16, 32)}
i1 := &net.IPNet{IP: net.ParseIP("192.168.0.1").To4(), Mask: net.CIDRMask(32, 32)}
i2 := &net.IPNet{IP: net.ParseIP("192.168.0.2").To4(), Mask: net.CIDRMask(32, 32)}
nodes := map[string]*Node{
"a": {
Name: "a",
ExternalIP: e1,
InternalIP: i1,
Location: "1",
Subnet: &net.IPNet{IP: net.ParseIP("10.2.1.0"), Mask: net.CIDRMask(24, 32)},
Key: []byte("key1"),
},
"b": {
Name: "b",
ExternalIP: e2,
InternalIP: i1,
Location: "2",
Subnet: &net.IPNet{IP: net.ParseIP("10.2.2.0"), Mask: net.CIDRMask(24, 32)},
Key: []byte("key2"),
},
"c": {
Name: "c",
ExternalIP: e3,
InternalIP: i2,
// Same location a node b.
Location: "2",
Subnet: &net.IPNet{IP: net.ParseIP("10.2.3.0"), Mask: net.CIDRMask(24, 32)},
Key: []byte("key3"),
},
}
peers := map[string]*Peer{
"a": {
Name: "a",
Peer: wireguard.Peer{
AllowedIPs: []*net.IPNet{
{IP: net.ParseIP("10.5.0.1"), Mask: net.CIDRMask(24, 32)},
{IP: net.ParseIP("10.5.0.2"), Mask: net.CIDRMask(24, 32)},
},
PublicKey: []byte("key4"),
},
},
"b": {
Name: "b",
Peer: wireguard.Peer{
AllowedIPs: []*net.IPNet{
{IP: net.ParseIP("10.5.0.3"), Mask: net.CIDRMask(24, 32)},
},
Endpoint: &wireguard.Endpoint{
IP: net.ParseIP("192.168.0.1"),
Port: DefaultKiloPort,
},
PublicKey: []byte("key5"),
},
},
}
return nodes, peers, key, DefaultKiloPort
}
func TestNewTopology(t *testing.T) {
nodes, peers, key, port := setup(t)
w1 := net.ParseIP("10.4.0.1").To4()
w2 := net.ParseIP("10.4.0.2").To4()
w3 := net.ParseIP("10.4.0.3").To4()
for _, tc := range []struct {
name string
granularity Granularity
hostname string
result *Topology
}{
{
name: "logical from a",
granularity: LogicalGranularity,
hostname: nodes["a"].Name,
result: &Topology{
hostname: nodes["a"].Name,
leader: true,
location: nodes["a"].Location,
subnet: DefaultKiloSubnet,
privateIP: nodes["a"].InternalIP,
wireGuardCIDR: &net.IPNet{IP: w1, Mask: net.CIDRMask(16, 32)},
segments: []*segment{
{
allowedIPs: []*net.IPNet{nodes["a"].Subnet, nodes["a"].InternalIP, {IP: w1, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["a"].ExternalIP.IP,
key: nodes["a"].Key,
location: nodes["a"].Location,
cidrs: []*net.IPNet{nodes["a"].Subnet},
hostnames: []string{"a"},
privateIPs: []net.IP{nodes["a"].InternalIP.IP},
wireGuardIP: w1,
},
{
allowedIPs: []*net.IPNet{nodes["b"].Subnet, nodes["b"].InternalIP, nodes["c"].Subnet, nodes["c"].InternalIP, {IP: w2, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["b"].ExternalIP.IP,
key: nodes["b"].Key,
location: nodes["b"].Location,
cidrs: []*net.IPNet{nodes["b"].Subnet, nodes["c"].Subnet},
hostnames: []string{"b", "c"},
privateIPs: []net.IP{nodes["b"].InternalIP.IP, nodes["c"].InternalIP.IP},
wireGuardIP: w2,
},
},
peers: []*Peer{peers["a"], peers["b"]},
},
},
{
name: "logical from b",
granularity: LogicalGranularity,
hostname: nodes["b"].Name,
result: &Topology{
hostname: nodes["b"].Name,
leader: true,
location: nodes["b"].Location,
subnet: DefaultKiloSubnet,
privateIP: nodes["b"].InternalIP,
wireGuardCIDR: &net.IPNet{IP: w2, Mask: net.CIDRMask(16, 32)},
segments: []*segment{
{
allowedIPs: []*net.IPNet{nodes["a"].Subnet, nodes["a"].InternalIP, {IP: w1, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["a"].ExternalIP.IP,
key: nodes["a"].Key,
location: nodes["a"].Location,
cidrs: []*net.IPNet{nodes["a"].Subnet},
hostnames: []string{"a"},
privateIPs: []net.IP{nodes["a"].InternalIP.IP},
wireGuardIP: w1,
},
{
allowedIPs: []*net.IPNet{nodes["b"].Subnet, nodes["b"].InternalIP, nodes["c"].Subnet, nodes["c"].InternalIP, {IP: w2, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["b"].ExternalIP.IP,
key: nodes["b"].Key,
location: nodes["b"].Location,
cidrs: []*net.IPNet{nodes["b"].Subnet, nodes["c"].Subnet},
hostnames: []string{"b", "c"},
privateIPs: []net.IP{nodes["b"].InternalIP.IP, nodes["c"].InternalIP.IP},
wireGuardIP: w2,
},
},
peers: []*Peer{peers["a"], peers["b"]},
},
},
{
name: "logical from c",
granularity: LogicalGranularity,
hostname: nodes["c"].Name,
result: &Topology{
hostname: nodes["c"].Name,
leader: false,
location: nodes["b"].Location,
subnet: DefaultKiloSubnet,
privateIP: nodes["c"].InternalIP,
wireGuardCIDR: nil,
segments: []*segment{
{
allowedIPs: []*net.IPNet{nodes["a"].Subnet, nodes["a"].InternalIP, {IP: w1, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["a"].ExternalIP.IP,
key: nodes["a"].Key,
location: nodes["a"].Location,
cidrs: []*net.IPNet{nodes["a"].Subnet},
hostnames: []string{"a"},
privateIPs: []net.IP{nodes["a"].InternalIP.IP},
wireGuardIP: w1,
},
{
allowedIPs: []*net.IPNet{nodes["b"].Subnet, nodes["b"].InternalIP, nodes["c"].Subnet, nodes["c"].InternalIP, {IP: w2, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["b"].ExternalIP.IP,
key: nodes["b"].Key,
location: nodes["b"].Location,
cidrs: []*net.IPNet{nodes["b"].Subnet, nodes["c"].Subnet},
hostnames: []string{"b", "c"},
privateIPs: []net.IP{nodes["b"].InternalIP.IP, nodes["c"].InternalIP.IP},
wireGuardIP: w2,
},
},
peers: []*Peer{peers["a"], peers["b"]},
},
},
{
name: "full from a",
granularity: FullGranularity,
hostname: nodes["a"].Name,
result: &Topology{
hostname: nodes["a"].Name,
leader: true,
location: nodes["a"].Name,
subnet: DefaultKiloSubnet,
privateIP: nodes["a"].InternalIP,
wireGuardCIDR: &net.IPNet{IP: w1, Mask: net.CIDRMask(16, 32)},
segments: []*segment{
{
allowedIPs: []*net.IPNet{nodes["a"].Subnet, nodes["a"].InternalIP, {IP: w1, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["a"].ExternalIP.IP,
key: nodes["a"].Key,
location: nodes["a"].Name,
cidrs: []*net.IPNet{nodes["a"].Subnet},
hostnames: []string{"a"},
privateIPs: []net.IP{nodes["a"].InternalIP.IP},
wireGuardIP: w1,
},
{
allowedIPs: []*net.IPNet{nodes["b"].Subnet, nodes["b"].InternalIP, {IP: w2, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["b"].ExternalIP.IP,
key: nodes["b"].Key,
location: nodes["b"].Name,
cidrs: []*net.IPNet{nodes["b"].Subnet},
hostnames: []string{"b"},
privateIPs: []net.IP{nodes["b"].InternalIP.IP},
wireGuardIP: w2,
},
{
allowedIPs: []*net.IPNet{nodes["c"].Subnet, nodes["c"].InternalIP, {IP: w3, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["c"].ExternalIP.IP,
key: nodes["c"].Key,
location: nodes["c"].Name,
cidrs: []*net.IPNet{nodes["c"].Subnet},
hostnames: []string{"c"},
privateIPs: []net.IP{nodes["c"].InternalIP.IP},
wireGuardIP: w3,
},
},
peers: []*Peer{peers["a"], peers["b"]},
},
},
{
name: "full from b",
granularity: FullGranularity,
hostname: nodes["b"].Name,
result: &Topology{
hostname: nodes["b"].Name,
leader: true,
location: nodes["b"].Name,
subnet: DefaultKiloSubnet,
privateIP: nodes["b"].InternalIP,
wireGuardCIDR: &net.IPNet{IP: w2, Mask: net.CIDRMask(16, 32)},
segments: []*segment{
{
allowedIPs: []*net.IPNet{nodes["a"].Subnet, nodes["a"].InternalIP, {IP: w1, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["a"].ExternalIP.IP,
key: nodes["a"].Key,
location: nodes["a"].Name,
cidrs: []*net.IPNet{nodes["a"].Subnet},
hostnames: []string{"a"},
privateIPs: []net.IP{nodes["a"].InternalIP.IP},
wireGuardIP: w1,
},
{
allowedIPs: []*net.IPNet{nodes["b"].Subnet, nodes["b"].InternalIP, {IP: w2, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["b"].ExternalIP.IP,
key: nodes["b"].Key,
location: nodes["b"].Name,
cidrs: []*net.IPNet{nodes["b"].Subnet},
hostnames: []string{"b"},
privateIPs: []net.IP{nodes["b"].InternalIP.IP},
wireGuardIP: w2,
},
{
allowedIPs: []*net.IPNet{nodes["c"].Subnet, nodes["c"].InternalIP, {IP: w3, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["c"].ExternalIP.IP,
key: nodes["c"].Key,
location: nodes["c"].Name,
cidrs: []*net.IPNet{nodes["c"].Subnet},
hostnames: []string{"c"},
privateIPs: []net.IP{nodes["c"].InternalIP.IP},
wireGuardIP: w3,
},
},
peers: []*Peer{peers["a"], peers["b"]},
},
},
{
name: "full from c",
granularity: FullGranularity,
hostname: nodes["c"].Name,
result: &Topology{
hostname: nodes["c"].Name,
leader: true,
location: nodes["c"].Name,
subnet: DefaultKiloSubnet,
privateIP: nodes["c"].InternalIP,
wireGuardCIDR: &net.IPNet{IP: w3, Mask: net.CIDRMask(16, 32)},
segments: []*segment{
{
allowedIPs: []*net.IPNet{nodes["a"].Subnet, nodes["a"].InternalIP, {IP: w1, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["a"].ExternalIP.IP,
key: nodes["a"].Key,
location: nodes["a"].Name,
cidrs: []*net.IPNet{nodes["a"].Subnet},
hostnames: []string{"a"},
privateIPs: []net.IP{nodes["a"].InternalIP.IP},
wireGuardIP: w1,
},
{
allowedIPs: []*net.IPNet{nodes["b"].Subnet, nodes["b"].InternalIP, {IP: w2, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["b"].ExternalIP.IP,
key: nodes["b"].Key,
location: nodes["b"].Name,
cidrs: []*net.IPNet{nodes["b"].Subnet},
hostnames: []string{"b"},
privateIPs: []net.IP{nodes["b"].InternalIP.IP},
wireGuardIP: w2,
},
{
allowedIPs: []*net.IPNet{nodes["c"].Subnet, nodes["c"].InternalIP, {IP: w3, Mask: net.CIDRMask(32, 32)}},
endpoint: nodes["c"].ExternalIP.IP,
key: nodes["c"].Key,
location: nodes["c"].Name,
cidrs: []*net.IPNet{nodes["c"].Subnet},
hostnames: []string{"c"},
privateIPs: []net.IP{nodes["c"].InternalIP.IP},
wireGuardIP: w3,
},
},
peers: []*Peer{peers["a"], peers["b"]},
},
},
} {
tc.result.key = key
tc.result.port = port
topo, err := NewTopology(nodes, peers, tc.granularity, tc.hostname, port, key, DefaultKiloSubnet)
if err != nil {
t.Errorf("test case %q: failed to generate Topology: %v", tc.name, err)
}
if diff := pretty.Compare(topo, tc.result); diff != "" {
t.Errorf("test case %q: got diff: %v", tc.name, diff)
}
}
}
func mustTopo(t *testing.T, nodes map[string]*Node, peers map[string]*Peer, granularity Granularity, hostname string, port uint32, key []byte, subnet *net.IPNet) *Topology {
topo, err := NewTopology(nodes, peers, granularity, hostname, port, key, subnet)
if err != nil {
t.Errorf("failed to generate Topology: %v", err)
}
return topo
}
func TestRoutes(t *testing.T) {
nodes, peers, key, port := setup(t)
kiloIface := 0
privIface := 1
pubIface := 2
mustTopoForGranularityAndHost := func(granularity Granularity, hostname string) *Topology {
return mustTopo(t, nodes, peers, granularity, hostname, port, key, DefaultKiloSubnet)
}
for _, tc := range []struct {
name string
local bool
topology *Topology
result []*netlink.Route
}{
{
name: "logical from a",
topology: mustTopoForGranularityAndHost(LogicalGranularity, nodes["a"].Name),
result: []*netlink.Route{
{
Dst: mustTopoForGranularityAndHost(LogicalGranularity, nodes["a"].Name).segments[1].cidrs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(LogicalGranularity, nodes["a"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["b"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(LogicalGranularity, nodes["a"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: mustTopoForGranularityAndHost(LogicalGranularity, nodes["a"].Name).segments[1].cidrs[1],
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(LogicalGranularity, nodes["a"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["c"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(LogicalGranularity, nodes["a"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[1],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["b"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
},
},
{
name: "logical from b",
topology: mustTopoForGranularityAndHost(LogicalGranularity, nodes["b"].Name),
result: []*netlink.Route{
{
Dst: mustTopoForGranularityAndHost(LogicalGranularity, nodes["b"].Name).segments[0].cidrs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(LogicalGranularity, nodes["b"].Name).segments[0].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["a"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(LogicalGranularity, nodes["b"].Name).segments[0].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[1],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["b"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
},
},
{
name: "logical from c",
topology: mustTopoForGranularityAndHost(LogicalGranularity, nodes["c"].Name),
result: []*netlink.Route{
{
Dst: oneAddressCIDR(mustTopoForGranularityAndHost(LogicalGranularity, nodes["c"].Name).segments[0].wireGuardIP),
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: mustTopoForGranularityAndHost(LogicalGranularity, nodes["c"].Name).segments[0].cidrs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["a"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(mustTopoForGranularityAndHost(LogicalGranularity, nodes["c"].Name).segments[1].wireGuardIP),
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[1],
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["b"].AllowedIPs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
},
},
{
name: "full from a",
topology: mustTopoForGranularityAndHost(FullGranularity, nodes["a"].Name),
result: []*netlink.Route{
{
Dst: mustTopoForGranularityAndHost(FullGranularity, nodes["a"].Name).segments[1].cidrs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["a"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["b"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["a"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: mustTopoForGranularityAndHost(FullGranularity, nodes["a"].Name).segments[2].cidrs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["a"].Name).segments[2].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["c"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["a"].Name).segments[2].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[1],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["b"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
},
},
{
name: "full from b",
topology: mustTopoForGranularityAndHost(FullGranularity, nodes["b"].Name),
result: []*netlink.Route{
{
Dst: mustTopoForGranularityAndHost(FullGranularity, nodes["b"].Name).segments[0].cidrs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["b"].Name).segments[0].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["a"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["b"].Name).segments[0].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: mustTopoForGranularityAndHost(FullGranularity, nodes["b"].Name).segments[2].cidrs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["b"].Name).segments[2].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["c"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["b"].Name).segments[2].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[1],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["b"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
},
},
{
name: "full from c",
topology: mustTopoForGranularityAndHost(FullGranularity, nodes["c"].Name),
result: []*netlink.Route{
{
Dst: mustTopoForGranularityAndHost(FullGranularity, nodes["c"].Name).segments[0].cidrs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["c"].Name).segments[0].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["a"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["c"].Name).segments[0].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: mustTopoForGranularityAndHost(FullGranularity, nodes["c"].Name).segments[1].cidrs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["c"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["b"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["c"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[1],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["b"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
},
},
{
name: "logical from a local",
local: true,
topology: mustTopoForGranularityAndHost(LogicalGranularity, nodes["a"].Name),
result: []*netlink.Route{
{
Dst: nodes["b"].Subnet,
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(LogicalGranularity, nodes["a"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["b"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(LogicalGranularity, nodes["a"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: nodes["c"].Subnet,
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(LogicalGranularity, nodes["a"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["c"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(LogicalGranularity, nodes["a"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[1],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["b"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
},
},
{
name: "logical from b local",
local: true,
topology: mustTopoForGranularityAndHost(LogicalGranularity, nodes["b"].Name),
result: []*netlink.Route{
{
Dst: nodes["a"].Subnet,
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(LogicalGranularity, nodes["b"].Name).segments[0].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["a"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(LogicalGranularity, nodes["b"].Name).segments[0].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: nodes["c"].Subnet,
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["c"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[1],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["b"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
},
},
{
name: "logical from c local",
local: true,
topology: mustTopoForGranularityAndHost(LogicalGranularity, nodes["c"].Name),
result: []*netlink.Route{
{
Dst: oneAddressCIDR(mustTopoForGranularityAndHost(LogicalGranularity, nodes["c"].Name).segments[0].wireGuardIP),
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: nodes["a"].Subnet,
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["a"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(mustTopoForGranularityAndHost(LogicalGranularity, nodes["c"].Name).segments[1].wireGuardIP),
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: nodes["b"].Subnet,
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[1],
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["b"].AllowedIPs[0],
Flags: int(netlink.FLAG_ONLINK),
Gw: nodes["b"].InternalIP.IP,
LinkIndex: privIface,
Protocol: unix.RTPROT_STATIC,
},
},
},
{
name: "full from a local",
local: true,
topology: mustTopoForGranularityAndHost(FullGranularity, nodes["a"].Name),
result: []*netlink.Route{
{
Dst: nodes["b"].Subnet,
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["a"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["b"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["a"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: nodes["c"].Subnet,
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["a"].Name).segments[2].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["c"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["a"].Name).segments[2].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[1],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["b"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
},
},
{
name: "full from b local",
local: true,
topology: mustTopoForGranularityAndHost(FullGranularity, nodes["b"].Name),
result: []*netlink.Route{
{
Dst: nodes["a"].Subnet,
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["b"].Name).segments[0].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["a"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["b"].Name).segments[0].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: nodes["c"].Subnet,
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["b"].Name).segments[2].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["c"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["b"].Name).segments[2].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[1],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["b"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
},
},
{
name: "full from c local",
local: true,
topology: mustTopoForGranularityAndHost(FullGranularity, nodes["c"].Name),
result: []*netlink.Route{
{
Dst: nodes["a"].Subnet,
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["c"].Name).segments[0].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["a"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["c"].Name).segments[0].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: nodes["b"].Subnet,
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["c"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: oneAddressCIDR(nodes["b"].InternalIP.IP),
Flags: int(netlink.FLAG_ONLINK),
Gw: mustTopoForGranularityAndHost(FullGranularity, nodes["c"].Name).segments[1].wireGuardIP,
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["a"].AllowedIPs[1],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
{
Dst: peers["b"].AllowedIPs[0],
LinkIndex: kiloIface,
Protocol: unix.RTPROT_STATIC,
},
},
},
} {
routes := tc.topology.Routes(kiloIface, privIface, pubIface, tc.local, NeverEncapsulate)
if diff := pretty.Compare(routes, tc.result); diff != "" {
t.Errorf("test case %q: got diff: %v", tc.name, diff)
}
}
}
func TestConf(t *testing.T) {
nodes, peers, key, port := setup(t)
for _, tc := range []struct {
name string
topology *Topology
result string
}{
{
name: "logical from a",
topology: mustTopo(t, nodes, peers, LogicalGranularity, nodes["a"].Name, port, key, DefaultKiloSubnet),
result: `[Interface]
PrivateKey = private
ListenPort = 51820
[Peer]
PublicKey = key2
Endpoint = 10.1.0.2:51820
AllowedIPs = 10.2.2.0/24, 192.168.0.1/32, 10.2.3.0/24, 192.168.0.2/32, 10.4.0.2/32
[Peer]
PublicKey = key4
PersistentKeepalive = 0
AllowedIPs = 10.5.0.1/24, 10.5.0.2/24
[Peer]
PublicKey = key5
Endpoint = 192.168.0.1:51820
PersistentKeepalive = 0
AllowedIPs = 10.5.0.3/24
`,
},
{
name: "logical from b",
topology: mustTopo(t, nodes, peers, LogicalGranularity, nodes["b"].Name, port, key, DefaultKiloSubnet),
result: `[Interface]
PrivateKey = private
ListenPort = 51820
[Peer]
PublicKey = key1
Endpoint = 10.1.0.1:51820
AllowedIPs = 10.2.1.0/24, 192.168.0.1/32, 10.4.0.1/32
[Peer]
PublicKey = key4
PersistentKeepalive = 0
AllowedIPs = 10.5.0.1/24, 10.5.0.2/24
[Peer]
PublicKey = key5
Endpoint = 192.168.0.1:51820
PersistentKeepalive = 0
AllowedIPs = 10.5.0.3/24
`,
},
{
name: "logical from c",
topology: mustTopo(t, nodes, peers, LogicalGranularity, nodes["c"].Name, port, key, DefaultKiloSubnet),
result: `[Interface]
PrivateKey = private
ListenPort = 51820
[Peer]
PublicKey = key1
Endpoint = 10.1.0.1:51820
AllowedIPs = 10.2.1.0/24, 192.168.0.1/32, 10.4.0.1/32
[Peer]
PublicKey = key4
PersistentKeepalive = 0
AllowedIPs = 10.5.0.1/24, 10.5.0.2/24
[Peer]
PublicKey = key5
Endpoint = 192.168.0.1:51820
PersistentKeepalive = 0
AllowedIPs = 10.5.0.3/24
`,
},
{
name: "full from a",
topology: mustTopo(t, nodes, peers, FullGranularity, nodes["a"].Name, port, key, DefaultKiloSubnet),
result: `[Interface]
PrivateKey = private
ListenPort = 51820
[Peer]
PublicKey = key2
Endpoint = 10.1.0.2:51820
AllowedIPs = 10.2.2.0/24, 192.168.0.1/32, 10.4.0.2/32
[Peer]
PublicKey = key3
Endpoint = 10.1.0.3:51820
AllowedIPs = 10.2.3.0/24, 192.168.0.2/32, 10.4.0.3/32
[Peer]
PublicKey = key4
PersistentKeepalive = 0
AllowedIPs = 10.5.0.1/24, 10.5.0.2/24
[Peer]
PublicKey = key5
Endpoint = 192.168.0.1:51820
PersistentKeepalive = 0
AllowedIPs = 10.5.0.3/24
`,
},
{
name: "full from b",
topology: mustTopo(t, nodes, peers, FullGranularity, nodes["b"].Name, port, key, DefaultKiloSubnet),
result: `[Interface]
PrivateKey = private
ListenPort = 51820
[Peer]
PublicKey = key1
Endpoint = 10.1.0.1:51820
AllowedIPs = 10.2.1.0/24, 192.168.0.1/32, 10.4.0.1/32
[Peer]
PublicKey = key3
Endpoint = 10.1.0.3:51820
AllowedIPs = 10.2.3.0/24, 192.168.0.2/32, 10.4.0.3/32
[Peer]
PublicKey = key4
PersistentKeepalive = 0
AllowedIPs = 10.5.0.1/24, 10.5.0.2/24
[Peer]
PublicKey = key5
Endpoint = 192.168.0.1:51820
PersistentKeepalive = 0
AllowedIPs = 10.5.0.3/24
`,
},
{
name: "full from c",
topology: mustTopo(t, nodes, peers, FullGranularity, nodes["c"].Name, port, key, DefaultKiloSubnet),
result: `[Interface]
PrivateKey = private
ListenPort = 51820
[Peer]
PublicKey = key1
Endpoint = 10.1.0.1:51820
AllowedIPs = 10.2.1.0/24, 192.168.0.1/32, 10.4.0.1/32
[Peer]
PublicKey = key2
Endpoint = 10.1.0.2:51820
AllowedIPs = 10.2.2.0/24, 192.168.0.1/32, 10.4.0.2/32
[Peer]
PublicKey = key4
PersistentKeepalive = 0
AllowedIPs = 10.5.0.1/24, 10.5.0.2/24
[Peer]
PublicKey = key5
Endpoint = 192.168.0.1:51820
PersistentKeepalive = 0
AllowedIPs = 10.5.0.3/24
`,
},
} {
conf := tc.topology.Conf()
if !conf.Equal(wireguard.Parse([]byte(tc.result))) {
buf, err := conf.Bytes()
if err != nil {
t.Errorf("test case %q: failed to render conf: %v", tc.name, err)
}
t.Errorf("test case %q: expected %s got %s", tc.name, tc.result, string(buf))
}
}
}
func TestFindLeader(t *testing.T) {
ip, e1, err := net.ParseCIDR("10.0.0.1/32")
if err != nil {
t.Fatalf("failed to parse external IP CIDR: %v", err)
}
e1.IP = ip
ip, e2, err := net.ParseCIDR("8.8.8.8/32")
if err != nil {
t.Fatalf("failed to parse external IP CIDR: %v", err)
}
e2.IP = ip
nodes := []*Node{
{
Name: "a",
ExternalIP: e1,
},
{
Name: "b",
ExternalIP: e2,
},
{
Name: "c",
ExternalIP: e2,
},
{
Name: "d",
ExternalIP: e1,
Leader: true,
},
{
Name: "2",
ExternalIP: e2,
Leader: true,
},
}
for _, tc := range []struct {
name string
nodes []*Node
out int
}{
{
name: "nil",
nodes: nil,
out: 0,
},
{
name: "one",
nodes: []*Node{nodes[0]},
out: 0,
},
{
name: "non-leaders",
nodes: []*Node{nodes[0], nodes[1], nodes[2]},
out: 1,
},
{
name: "leaders",
nodes: []*Node{nodes[3], nodes[4]},
out: 1,
},
{
name: "public",
nodes: []*Node{nodes[1], nodes[2], nodes[4]},
out: 2,
},
{
name: "private",
nodes: []*Node{nodes[0], nodes[3]},
out: 1,
},
{
name: "all",
nodes: nodes,
out: 4,
},
} {
l := findLeader(tc.nodes)
if l != tc.out {
t.Errorf("test case %q: expected %d got %d", tc.name, tc.out, l)
}
}
}
func TestDeduplicatePeerIPs(t *testing.T) {
p1 := &Peer{
Name: "1",
Peer: wireguard.Peer{
PublicKey: []byte("key1"),
AllowedIPs: []*net.IPNet{
{IP: net.ParseIP("10.0.0.1"), Mask: net.CIDRMask(24, 32)},
{IP: net.ParseIP("10.0.0.2"), Mask: net.CIDRMask(24, 32)},
},
},
}
p2 := &Peer{
Name: "2",
Peer: wireguard.Peer{
PublicKey: []byte("key2"),
AllowedIPs: []*net.IPNet{
{IP: net.ParseIP("10.0.0.1"), Mask: net.CIDRMask(24, 32)},
{IP: net.ParseIP("10.0.0.3"), Mask: net.CIDRMask(24, 32)},
},
},
}
p3 := &Peer{
Name: "3",
Peer: wireguard.Peer{
PublicKey: []byte("key3"),
AllowedIPs: []*net.IPNet{
{IP: net.ParseIP("10.0.0.2"), Mask: net.CIDRMask(24, 32)},
{IP: net.ParseIP("10.0.0.3"), Mask: net.CIDRMask(24, 32)},
{IP: net.ParseIP("10.0.0.1"), Mask: net.CIDRMask(24, 32)},
},
},
}
p4 := &Peer{
Name: "4",
Peer: wireguard.Peer{
PublicKey: []byte("key4"),
AllowedIPs: []*net.IPNet{
{IP: net.ParseIP("10.0.0.3"), Mask: net.CIDRMask(24, 32)},
{IP: net.ParseIP("10.0.0.3"), Mask: net.CIDRMask(24, 32)},
},
},
}
for _, tc := range []struct {
name string
peers []*Peer
out []*Peer
}{
{
name: "nil",
peers: nil,
out: nil,
},
{
name: "simple dupe",
peers: []*Peer{p1, p2},
out: []*Peer{
p1,
{
Name: "2",
Peer: wireguard.Peer{
PublicKey: []byte("key2"),
AllowedIPs: []*net.IPNet{
{IP: net.ParseIP("10.0.0.3"), Mask: net.CIDRMask(24, 32)},
},
},
},
},
},
{
name: "simple dupe reversed",
peers: []*Peer{p2, p1},
out: []*Peer{
p2,
{
Name: "1",
Peer: wireguard.Peer{
PublicKey: []byte("key1"),
AllowedIPs: []*net.IPNet{
{IP: net.ParseIP("10.0.0.2"), Mask: net.CIDRMask(24, 32)},
},
},
},
},
},
{
name: "one duplicates all",
peers: []*Peer{p3, p2, p1, p4},
out: []*Peer{
p3,
{
Name: "2",
Peer: wireguard.Peer{
PublicKey: []byte("key2"),
},
},
{
Name: "1",
Peer: wireguard.Peer{
PublicKey: []byte("key1"),
},
},
{
Name: "4",
Peer: wireguard.Peer{
PublicKey: []byte("key4"),
},
},
},
},
{
name: "one duplicates itself",
peers: []*Peer{p4, p1},
out: []*Peer{
{
Name: "4",
Peer: wireguard.Peer{
PublicKey: []byte("key4"),
AllowedIPs: []*net.IPNet{
{IP: net.ParseIP("10.0.0.3"), Mask: net.CIDRMask(24, 32)},
},
},
},
{
Name: "1",
Peer: wireguard.Peer{
PublicKey: []byte("key1"),
AllowedIPs: []*net.IPNet{
{IP: net.ParseIP("10.0.0.1"), Mask: net.CIDRMask(24, 32)},
{IP: net.ParseIP("10.0.0.2"), Mask: net.CIDRMask(24, 32)},
},
},
},
},
},
} {
out := deduplicatePeerIPs(tc.peers)
if diff := pretty.Compare(out, tc.out); diff != "" {
t.Errorf("test case %q: got diff: %v", tc.name, diff)
}
}
}
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