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Merge 1b07f68f20301e86fec7874431f06a7a613fa0e0 into fd4b7d8879df634464bd4acafe27ba48ba1fa4d1

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This commit is contained in:
Benoît Ganne 2020-12-23 11:31:37 -08:00 committed by GitHub
commit 6b005d5e5f
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GPG Key ID: 4AEE18F83AFDEB23
9 changed files with 343 additions and 110 deletions
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10
README.md
View File

@ -74,12 +74,12 @@ _wireguard._udp.example.com. 0 IN PTR yutrled535igkl7bdlerl6m4vjxsxm3uqqpl4nmsn2
_wireguard._udp.example.com. 0 IN PTR wmrid55v4enhxqx2jstyoyvkicj5pihkb2tr7r42smiu3t5l4i5q====._wireguard._udp.example.com.
$
$ dig @127.0.0.1 -p 5353 yutrled535igkl7bdlerl6m4vjxsxm3uqqpl4nmsn27mt56ad4ha====._wireguard._udp.example.com. SRV +noall +answer +additional
yutrled535igkl7bdlerl6m4vjxsxm3uqqpl4nmsn27mt56ad4ha====._wireguard._udp.example.com. 0 IN SRV 0 0 7777 yutrled535igkl7bdlerl6m4vjxsxm3uqqpl4nmsn27mt56ad4ha====.example.com.
yutrled535igkl7bdlerl6m4vjxsxm3uqqpl4nmsn27mt56ad4ha====.example.com. 0 IN A 203.0.113.1
yutrled535igkl7bdlerl6m4vjxsxm3uqqpl4nmsn27mt56ad4ha====._wireguard._udp.example.com. 0 IN SRV 0 0 7777 yutrled535igkl7bdlerl6m4vjxsxm3uqqpl4nmsn27mt56ad4ha====._wireguard._udp.example.com.
yutrled535igkl7bdlerl6m4vjxsxm3uqqpl4nmsn27mt56ad4ha====._wireguard._udp.example.com. 0 IN A 203.0.113.1
$
$ dig @127.0.0.1 -p 5353 wmrid55v4enhxqx2jstyoyvkicj5pihkb2tr7r42smiu3t5l4i5q====._wireguard._udp.example.com. SRV +noall +answer +additional
wmrid55v4enhxqx2jstyoyvkicj5pihkb2tr7r42smiu3t5l4i5q====._wireguard._udp.example.com. 0 IN SRV 0 0 8888 wmrid55v4enhxqx2jstyoyvkicj5pihkb2tr7r42smiu3t5l4i5q====.example.com.
wmrid55v4enhxqx2jstyoyvkicj5pihkb2tr7r42smiu3t5l4i5q====.example.com. 0 IN A 198.51.100.1
wmrid55v4enhxqx2jstyoyvkicj5pihkb2tr7r42smiu3t5l4i5q====._wireguard._udp.example.com. 0 IN SRV 0 0 8888 wmrid55v4enhxqx2jstyoyvkicj5pihkb2tr7r42smiu3t5l4i5q====._wireguard._udp.example.com.
wmrid55v4enhxqx2jstyoyvkicj5pihkb2tr7r42smiu3t5l4i5q====._wireguard._udp.example.com. 0 IN A 198.51.100.1
```
Converting public keys to Base64 with coreutils:
@ -93,4 +93,4 @@ syKB97XhGnvC+kynh2KqQJPXoOoOpx/HmpMRTc+r4js=
## TODOs
- [x] unit tests
- [ ] SOA record support
- [x] CI & release binaries
- [x] CI & release binaries

205
cmd/wgsd-client/main.go
View File

@ -3,13 +3,12 @@ package main
import (
"context"
"encoding/base32"
"encoding/base64"
"flag"
"fmt"
"log"
"net"
"os"
"os/signal"
"strings"
"syscall"
"time"
@ -24,6 +23,12 @@ var (
dnsServerFlag = flag.String("dns", "",
"ip:port of DNS server")
dnsZoneFlag = flag.String("zone", "", "dns zone name")
serviceFlag = flag.String("service", "", "service ip or public key")
)
const (
keyLen = 56 // the number of characters in a base32-encoded Wireguard public key
spPrefix = "_wireguard._udp."
)
func main() {
@ -64,76 +69,45 @@ func main() {
dnsClient := &dns.Client{
Timeout: time.Second * 5,
}
for _, peer := range wgDevice.Peers {
suffix := spPrefix + dns.Fqdn(*dnsZoneFlag)
if len(*serviceFlag) >= 1 {
fqdn := *serviceFlag
suffix = "." + suffix
if !strings.HasSuffix(fqdn, suffix) {
fqdn += suffix
}
ConnectPeer(ctx, wgClient, wgDevice, dnsClient, fqdn, *dnsServerFlag)
return
}
srvCtx, srvCancel := context.WithCancel(ctx)
m := &dns.Msg{}
m.SetQuestion(suffix, dns.TypePTR)
r, _, err := dnsClient.ExchangeContext(srvCtx, m, *dnsServerFlag)
srvCancel()
if err != nil {
log.Printf("failed to lookup PTR: %v", err)
return
}
if len(r.Answer) < 1 {
log.Printf("no PTR records found")
return
}
for _, answer := range r.Answer {
select {
case <-ctx.Done():
return
default:
}
srvCtx, srvCancel := context.WithCancel(ctx)
pubKeyBase32 := base32.StdEncoding.EncodeToString(peer.PublicKey[:])
pubKeyBase64 := base64.StdEncoding.EncodeToString(peer.PublicKey[:])
m := &dns.Msg{}
question := fmt.Sprintf("%s._wireguard._udp.%s",
pubKeyBase32, dns.Fqdn(*dnsZoneFlag))
m.SetQuestion(question, dns.TypeSRV)
r, _, err := dnsClient.ExchangeContext(srvCtx, m, *dnsServerFlag)
srvCancel()
if err != nil {
log.Printf(
"[%s] failed to lookup SRV: %v", pubKeyBase64, err)
ptr, ok := answer.(*dns.PTR)
if !ok {
log.Printf("non-PTR answer in response to PTR query: %s", answer.String())
continue
}
if len(r.Answer) < 1 {
log.Printf("[%s] no SRV records found", pubKeyBase64)
continue
}
srv, ok := r.Answer[0].(*dns.SRV)
if !ok {
log.Printf(
"[%s] non-SRV answer in response to SRV query: %s",
pubKeyBase64, r.Answer[0].String())
}
if len(r.Extra) < 1 {
log.Printf("[%s] SRV response missing extra A/AAAA",
pubKeyBase64)
}
var endpointIP net.IP
hostA, ok := r.Extra[0].(*dns.A)
if !ok {
hostAAAA, ok := r.Extra[0].(*dns.AAAA)
if !ok {
log.Printf(
"[%s] non-A/AAAA extra in SRV response: %s",
pubKeyBase64, r.Extra[0].String())
continue
}
endpointIP = hostAAAA.AAAA
} else {
endpointIP = hostA.A
}
peerConfig := wgtypes.PeerConfig{
PublicKey: peer.PublicKey,
UpdateOnly: true,
Endpoint: &net.UDPAddr{
IP: endpointIP,
Port: int(srv.Port),
},
}
deviceConfig := wgtypes.Config{
PrivateKey: &wgDevice.PrivateKey,
ReplacePeers: false,
Peers: []wgtypes.PeerConfig{peerConfig},
}
if wgDevice.FirewallMark > 0 {
deviceConfig.FirewallMark = &wgDevice.FirewallMark
}
err = wgClient.ConfigureDevice(*deviceFlag, deviceConfig)
if err != nil {
log.Printf(
"[%s] failed to configure peer on %s, error: %v",
pubKeyBase64, *deviceFlag, err)
}
ConnectPeer(ctx, wgClient, wgDevice, dnsClient, ptr.Ptr, *dnsServerFlag)
}
}()
sigCh := make(chan os.Signal, 1)
@ -146,3 +120,104 @@ func main() {
case <-done:
}
}
func ConnectPeer(ctx context.Context, wgClient *wgctrl.Client, wgDevice *wgtypes.Device, dnsClient *dns.Client, serviceFqdn string, dnsServer string) {
srvCtx, srvCancel := context.WithCancel(ctx)
m := &dns.Msg{}
m.SetQuestion(serviceFqdn, dns.TypeSRV)
r, _, err := dnsClient.ExchangeContext(srvCtx, m, dnsServer)
srvCancel()
if err != nil {
log.Printf(
"[%s] failed to lookup SRV: %v", serviceFqdn, err)
return
}
if len(r.Answer) < 1 {
log.Printf("[%s] no SRV records found", serviceFqdn)
return
}
srv, ok := r.Answer[0].(*dns.SRV)
if !ok {
log.Printf(
"[%s] non-SRV answer in response to SRV query: %s",
serviceFqdn, r.Answer[0].String())
return
}
if len(r.Extra) < 2 {
log.Printf("[%s] SRV response missing extra A/AAAA and TXT",
serviceFqdn)
return
}
var endpointIP net.IP
hostA, ok := r.Extra[0].(*dns.A)
if !ok {
hostAAAA, ok := r.Extra[0].(*dns.AAAA)
if !ok {
log.Printf(
"[%s] non-A/AAAA extra in SRV response: %s",
serviceFqdn, r.Extra[0].String())
return
}
endpointIP = hostAAAA.AAAA
} else {
endpointIP = hostA.A
}
txt, ok := r.Extra[1].(*dns.TXT)
if !ok {
log.Printf("[%s] non-TXT extra in SRV response: %s",
serviceFqdn, r.Extra[1].String())
return
}
allowedIPsString := strings.TrimPrefix(strings.ToLower(txt.Txt[0]), "allowedip=")
_, allowedIPs, err := net.ParseCIDR(allowedIPsString)
if err != nil {
log.Printf("[%s] failed to parse allowedip in TXT extra: %s", serviceFqdn, r.Extra[1].String())
return
}
pubKeyString := strings.TrimPrefix(strings.ToUpper(txt.Txt[1]), "PUBKEY=")
if len(pubKeyString) < keyLen {
pubKeyString += strings.Repeat("=", keyLen-len(pubKeyString))
}
pubKeyBytes, err := base32.StdEncoding.DecodeString(strings.ToUpper(pubKeyString))
if err != nil {
log.Printf("[%s] failed to decode base32 key %s: %v", serviceFqdn, pubKeyString, err)
return
}
pubKeyWg, err := wgtypes.NewKey(pubKeyBytes)
if err != nil {
log.Printf("[%s] failed to create wg key: %v", serviceFqdn, err)
return
}
if pubKeyWg == wgDevice.PublicKey {
log.Printf("[%s] skipping ourself", serviceFqdn)
return
}
peerConfig := wgtypes.PeerConfig{
PublicKey: pubKeyWg,
UpdateOnly: false,
Endpoint: &net.UDPAddr{
IP: endpointIP,
Port: int(srv.Port),
},
ReplaceAllowedIPs: true,
AllowedIPs: []net.IPNet{*allowedIPs},
}
deviceConfig := wgtypes.Config{
PrivateKey: &wgDevice.PrivateKey,
ReplacePeers: false,
Peers: []wgtypes.PeerConfig{peerConfig},
}
if wgDevice.FirewallMark > 0 {
deviceConfig.FirewallMark = &wgDevice.FirewallMark
}
err = wgClient.ConfigureDevice(*deviceFlag, deviceConfig)
if err != nil {
log.Printf(
"[%s] failed to configure peer on %s, error: %v",
serviceFqdn, *deviceFlag, err)
return
}
log.Printf("[%s] configure peer on %s", serviceFqdn, *deviceFlag)
}

6
vagrant/Corefile Normal file
View File

@ -0,0 +1,6 @@
.:5353 {
debug
bind 127.0.0.1
bind 192.168.100.10
wgsd example.com. wg0
}

11
vagrant/README Normal file
View File

@ -0,0 +1,11 @@
Quick start instructions
Clone & build wgsd:
~# go get github.com/jwhited/wgsd
Start and provision VMs with Vagrant:
~# cd ~/go/src/github.com/jwhited/wgsd/vagrant
~# vagrant up
Setup Wireguard Mesh:
~# ./setup.sh

54
vagrant/Vagrantfile vendored Normal file
View File

@ -0,0 +1,54 @@
# -*- mode: ruby -*-
# vi: set ft=ruby :
Vagrant.configure("2") do |config|
config.trigger.before :up do |trigger|
trigger.run = {inline: "cp -uvf ../../../../../bin/coredns ../../../../../bin/wgsd-client ."}
end
config.vm.box = "ubuntu/focal64"
config.vm.box_check_update = false
config.vm.synced_folder ".", "/vagrant", type: "rsync"
config.vm.provision "shell", inline: <<-SHELL
apt-get -y update
apt-get -y install wireguard
SHELL
config.vm.define "registry" do |registry|
registry.vm.hostname = "registry"
registry.vm.network "private_network", ip: "192.168.33.10"
registry.vm.provision "shell", inline: <<-SHELL
wg genkey | tee /etc/wireguard/privatekey | wg pubkey | tee /etc/wireguard/publickey
cat > /etc/wireguard/wg0.conf << EOF
[Interface]
PrivateKey = $(cat /etc/wireguard/privatekey)
Address = 192.168.100.10/24
SaveConfig = True
ListenPort = 51820
EOF
chmod 600 /etc/wireguard/{privatekey,wg0.conf}
chmod 644 /etc/wireguard/publickey
chmod 711 /etc/wireguard
systemctl enable wg-quick@wg0
systemctl start wg-quick@wg0
cat > /etc/rc.local << EOF
#!/bin/sh
/vagrant/coredns -conf /vagrant/Corefile | logger &
EOF
chmod 755 /etc/rc.local
sleep 1
/etc/rc.local
SHELL
end
(1..4).each do |i|
config.vm.define "client-#{i}" do |client|
client.vm.hostname = "client-#{i}"
client.vm.network "private_network", ip: "192.168.33.10#{i}"
end
end
end

32
vagrant/add.sh Executable file
View File

@ -0,0 +1,32 @@
#!/bin/sh
set -eux
VM=$1
ADDR=$2
SERVER_KEY=$(vagrant ssh registry -- cat /etc/wireguard/publickey)
vagrant ssh $VM -- sudo bash -s << EOF
wg genkey | tee /etc/wireguard/privatekey | wg pubkey | tee /etc/wireguard/publickey
# linux config
cat > /etc/wireguard/wg0.conf << CLIENTEOF
[Interface]
PrivateKey = \$(cat /etc/wireguard/privatekey)
Address = $ADDR/24
ListenPort = 51820
[Peer]
PublicKey = $SERVER_KEY
Endpoint = 192.168.33.10:51820
AllowedIPs = 192.168.100.10/32
CLIENTEOF
chmod 600 /etc/wireguard/{privatekey,wg0.conf}
chmod 644 /etc/wireguard/publickey
chmod 711 /etc/wireguard
EOF
CLIENT_KEY=$(vagrant ssh $VM -- cat /etc/wireguard/publickey)
vagrant ssh registry -- sudo wg set wg0 peer $CLIENT_KEY allowed-ips $ADDR/32
vagrant ssh $VM -- sudo systemctl enable wg-quick@wg0
vagrant ssh $VM -- sudo systemctl restart wg-quick@wg0
vagrant ssh $VM -- ping -c2 192.168.100.10

19
vagrant/setup.sh Executable file
View File

@ -0,0 +1,19 @@
#!/bin/bash
set -eux
PEER_NR=4
for ((i=1;i<=$PEER_NR;i++));do
./add.sh client-$i 192.168.100.10$i
done
for ((i=1;i<=$PEER_NR;i++));do
vagrant ssh client-$i -- sudo /vagrant/wgsd-client -device wg0 -dns 192.168.100.10:5353 -zone example.com.
done
for ((i=1;i<=$PEER_NR;i++));do
vagrant ssh client-$i -- ping -c2 192.168.100.10
for ((j=1;j<=$PEER_NR;j++));do
vagrant ssh client-$i -- ping -c2 192.168.100.10$j
done
done

90
wgsd.go
View File

@ -35,11 +35,13 @@ type wgctrlClient interface {
}
const (
keyLen = 56 // the number of characters in a base32-encoded Wireguard public key
spPrefix = "_wireguard._udp."
serviceInstanceLen = keyLen + len(".") + len(spPrefix)
keyLen = 56 // the number of characters in a base32-encoded Wireguard public key
spPrefix = "_wireguard._udp."
spSubPrefix = "." + spPrefix
)
var emptySubnet = net.IPNet{IP: net.IPv4zero, Mask: net.IPv4Mask(0, 0, 0, 0)}
func (p *WGSD) ServeDNS(ctx context.Context, w dns.ResponseWriter,
r *dns.Msg) (int, error) {
// request.Request is a convenience struct we wrap around the msg and
@ -93,36 +95,64 @@ func (p *WGSD) ServeDNS(ctx context.Context, w dns.ResponseWriter,
}
w.WriteMsg(m) // nolint: errcheck
return dns.RcodeSuccess, nil
case len(name) == serviceInstanceLen && qtype == dns.TypeSRV:
pubKey := name[:keyLen]
case qtype == dns.TypeSRV && strings.HasSuffix(name, spSubPrefix):
name = name[:len(name)-len(spSubPrefix)]
logger.Debugf("received query for: %s type: %s", name,
dns.TypeToString[qtype])
for _, peer := range device.Peers {
if strings.EqualFold(
base32.StdEncoding.EncodeToString(peer.PublicKey[:]), pubKey) {
endpoint := peer.Endpoint
hostRR := getHostRR(pubKey, p.zone, endpoint)
if hostRR == nil {
return nxDomain(p.zone, w, r)
}
m.Extra = append(m.Extra, hostRR)
m.Answer = append(m.Answer, &dns.SRV{
Hdr: dns.RR_Header{
Name: state.Name(),
Rrtype: dns.TypeSRV,
Class: dns.ClassINET,
Ttl: 0,
},
Priority: 0,
Weight: 0,
Port: uint16(endpoint.Port),
Target: fmt.Sprintf("%s.%s",
strings.ToLower(pubKey), p.zone),
})
w.WriteMsg(m) // nolint: errcheck
return dns.RcodeSuccess, nil
pubKey := base32.StdEncoding.EncodeToString(peer.PublicKey[:])
allowedIPs := &emptySubnet
if len(peer.AllowedIPs) >= 1 {
allowedIPs = &peer.AllowedIPs[0]
}
if len(name) == keyLen {
// check by keyname
if !strings.EqualFold(pubKey, name[:keyLen]) {
continue
}
} else {
// check by ip
ip := net.ParseIP(name)
if ip == nil || !allowedIPs.Contains(ip) {
continue
}
}
endpoint := peer.Endpoint
hostRR := getHostRR(pubKey, p.zone, endpoint)
if hostRR == nil {
return nxDomain(p.zone, w, r)
}
m.Extra = append(m.Extra, hostRR)
pubKey = strings.ToLower(pubKey)
m.Extra = append(m.Extra, &dns.TXT{
Hdr: dns.RR_Header{
Name: state.Name(),
Rrtype: dns.TypeTXT,
Class: dns.ClassINET,
Ttl: 0,
},
Txt: []string{
"allowedip=" + allowedIPs.String(),
"pubkey=" + strings.TrimRight(pubKey, "="),
},
})
m.Answer = append(m.Answer, &dns.SRV{
Hdr: dns.RR_Header{
Name: state.Name(),
Rrtype: dns.TypeSRV,
Class: dns.ClassINET,
Ttl: 0,
},
Priority: 0,
Weight: 0,
Port: uint16(endpoint.Port),
Target: pubKey + spSubPrefix + p.zone,
})
w.WriteMsg(m) // nolint: errcheck
return dns.RcodeSuccess, nil
}
return nxDomain(p.zone, w, r)
case len(name) == keyLen+1 && (qtype == dns.TypeA ||
case len(name) == len(spSubPrefix)+keyLen && (qtype == dns.TypeA ||
qtype == dns.TypeAAAA):
pubKey := name[:keyLen]
for _, peer := range device.Peers {
@ -148,7 +178,7 @@ func getHostRR(pubKey, zone string, endpoint *net.UDPAddr) dns.RR {
if endpoint == nil || endpoint.IP == nil {
return nil
}
name := fmt.Sprintf("%s.%s", strings.ToLower(pubKey), zone)
name := strings.ToLower(pubKey) + spSubPrefix + zone
switch {
case endpoint.IP.To4() != nil:
return &dns.A{

26
wgsd_test.go
View File

@ -28,22 +28,26 @@ func (m *mockClient) Device(d string) (*wgtypes.Device, error) {
func TestWGSD(t *testing.T) {
key1 := [32]byte{}
key1[0] = 1
_, allowedip1, _ := net.ParseCIDR("2.2.2.2/32")
peer1 := wgtypes.Peer{
Endpoint: &net.UDPAddr{
IP: net.ParseIP("1.1.1.1"),
Port: 1,
},
PublicKey: key1,
AllowedIPs: []net.IPNet{*allowedip1},
PublicKey: key1,
}
peer1b32 := strings.ToLower(base32.StdEncoding.EncodeToString(peer1.PublicKey[:]))
key2 := [32]byte{}
key2[0] = 2
_, allowedip2, _ := net.ParseCIDR("::3/128")
peer2 := wgtypes.Peer{
Endpoint: &net.UDPAddr{
IP: net.ParseIP("::2"),
Port: 2,
},
PublicKey: key2,
AllowedIPs: []net.IPNet{*allowedip2},
PublicKey: key2,
}
peer2b32 := strings.ToLower(base32.StdEncoding.EncodeToString(peer2.PublicKey[:]))
p := &WGSD{
@ -70,10 +74,11 @@ func TestWGSD(t *testing.T) {
Qtype: dns.TypeSRV,
Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV(fmt.Sprintf("%s._wireguard._udp.example.com. 0 IN SRV 0 0 1 %s.example.com.", peer1b32, peer1b32)),
test.SRV(fmt.Sprintf("%s._wireguard._udp.example.com. 0 IN SRV 0 0 1 %s._wireguard._udp.example.com.", peer1b32, peer1b32)),
},
Extra: []dns.RR{
test.A(fmt.Sprintf("%s.example.com. 0 IN A %s", peer1b32, peer1.Endpoint.IP.String())),
test.A(fmt.Sprintf("%s._wireguard._udp.example.com. 0 IN A %s", peer1b32, peer1.Endpoint.IP.String())),
test.TXT(fmt.Sprintf("%s._wireguard._udp.example.com. 0 IN TXT allowedip=%s pubkey=%s", peer1b32, peer1.AllowedIPs[0].String(), strings.TrimRight(peer1b32, "="))),
},
},
{
@ -81,26 +86,27 @@ func TestWGSD(t *testing.T) {
Qtype: dns.TypeSRV,
Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.SRV(fmt.Sprintf("%s._wireguard._udp.example.com. 0 IN SRV 0 0 2 %s.example.com.", peer2b32, peer2b32)),
test.SRV(fmt.Sprintf("%s._wireguard._udp.example.com. 0 IN SRV 0 0 2 %s._wireguard._udp.example.com.", peer2b32, peer2b32)),
},
Extra: []dns.RR{
test.AAAA(fmt.Sprintf("%s.example.com. 0 IN AAAA %s", peer2b32, peer2.Endpoint.IP.String())),
test.AAAA(fmt.Sprintf("%s._wireguard._udp.example.com. 0 IN AAAA %s", peer2b32, peer2.Endpoint.IP.String())),
test.TXT(fmt.Sprintf("%s._wireguard._udp.example.com. 0 IN TXT allowedip=%s pubkey=%s", peer2b32, peer2.AllowedIPs[0].String(), strings.TrimRight(peer2b32, "="))),
},
},
{
Qname: fmt.Sprintf("%s.example.com.", peer1b32),
Qname: fmt.Sprintf("%s._wireguard._udp.example.com.", peer1b32),
Qtype: dns.TypeA,
Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.A(fmt.Sprintf("%s.example.com. 0 IN A %s", peer1b32, peer1.Endpoint.IP.String())),
test.A(fmt.Sprintf("%s._wireguard._udp.example.com. 0 IN A %s", peer1b32, peer1.Endpoint.IP.String())),
},
},
{
Qname: fmt.Sprintf("%s.example.com.", peer2b32),
Qname: fmt.Sprintf("%s._wireguard._udp.example.com.", peer2b32),
Qtype: dns.TypeAAAA,
Rcode: dns.RcodeSuccess,
Answer: []dns.RR{
test.AAAA(fmt.Sprintf("%s.example.com. 0 IN AAAA %s", peer2b32, peer2.Endpoint.IP.String())),
test.AAAA(fmt.Sprintf("%s._wireguard._udp.example.com. 0 IN AAAA %s", peer2b32, peer2.Endpoint.IP.String())),
},
},
{