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Remove unused private IP code from agent/consul

This commit is contained in:
Daniel Nephin 2020-06-18 12:24:01 -04:00
parent abce1f0eee
commit a00f007c5e
2 changed files with 0 additions and 382 deletions
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196
agent/consul/util.go
View File

@ -3,7 +3,6 @@ package consul
import (
"encoding/binary"
"fmt"
"net"
"runtime"
"strconv"
@ -13,58 +12,6 @@ import (
"github.com/hashicorp/serf/serf"
)
/*
* Contains an entry for each private block:
* 10.0.0.0/8
* 100.64.0.0/10
* 127.0.0.0/8
* 169.254.0.0/16
* 172.16.0.0/12
* 192.168.0.0/16
*/
var privateBlocks []*net.IPNet
func init() {
// Add each private block
privateBlocks = make([]*net.IPNet, 6)
_, block, err := net.ParseCIDR("10.0.0.0/8")
if err != nil {
panic(fmt.Sprintf("Bad cidr. Got %v", err))
}
privateBlocks[0] = block
_, block, err = net.ParseCIDR("100.64.0.0/10")
if err != nil {
panic(fmt.Sprintf("Bad cidr. Got %v", err))
}
privateBlocks[1] = block
_, block, err = net.ParseCIDR("127.0.0.0/8")
if err != nil {
panic(fmt.Sprintf("Bad cidr. Got %v", err))
}
privateBlocks[2] = block
_, block, err = net.ParseCIDR("169.254.0.0/16")
if err != nil {
panic(fmt.Sprintf("Bad cidr. Got %v", err))
}
privateBlocks[3] = block
_, block, err = net.ParseCIDR("172.16.0.0/12")
if err != nil {
panic(fmt.Sprintf("Bad cidr. Got %v", err))
}
privateBlocks[4] = block
_, block, err = net.ParseCIDR("192.168.0.0/16")
if err != nil {
panic(fmt.Sprintf("Bad cidr. Got %v", err))
}
privateBlocks[5] = block
}
// CanServersUnderstandProtocol checks to see if all the servers in the given
// list understand the given protocol version. If there are no servers in the
// list then this will return false.
@ -103,149 +50,6 @@ func isConsulNode(m serf.Member) (bool, string) {
return true, m.Tags["dc"]
}
// Returns if the given IP is in a private block
func isPrivateIP(ipStr string) bool {
ip := net.ParseIP(ipStr)
for _, priv := range privateBlocks {
if priv.Contains(ip) {
return true
}
}
return false
}
// Returns addresses from interfaces that is up
func activeInterfaceAddresses() ([]net.Addr, error) {
var upAddrs []net.Addr
var loAddrs []net.Addr
interfaces, err := net.Interfaces()
if err != nil {
return nil, fmt.Errorf("Failed to get interfaces: %v", err)
}
for _, iface := range interfaces {
// Require interface to be up
if iface.Flags&net.FlagUp == 0 {
continue
}
addresses, err := iface.Addrs()
if err != nil {
return nil, fmt.Errorf("Failed to get interface addresses: %v", err)
}
if iface.Flags&net.FlagLoopback != 0 {
loAddrs = append(loAddrs, addresses...)
continue
}
upAddrs = append(upAddrs, addresses...)
}
if len(upAddrs) == 0 {
return loAddrs, nil
}
return upAddrs, nil
}
// GetPrivateIP is used to return the first private IP address
// associated with an interface on the machine
func GetPrivateIP() (net.IP, error) {
addresses, err := activeInterfaceAddresses()
if err != nil {
return nil, fmt.Errorf("Failed to get interface addresses: %v", err)
}
return getPrivateIP(addresses)
}
func getPrivateIP(addresses []net.Addr) (net.IP, error) {
var candidates []net.IP
// Find private IPv4 address
for _, rawAddr := range addresses {
var ip net.IP
switch addr := rawAddr.(type) {
case *net.IPAddr:
ip = addr.IP
case *net.IPNet:
ip = addr.IP
default:
continue
}
if ip.To4() == nil {
continue
}
if !isPrivateIP(ip.String()) {
continue
}
candidates = append(candidates, ip)
}
numIps := len(candidates)
switch numIps {
case 0:
return nil, fmt.Errorf("No private IP address found")
case 1:
return candidates[0], nil
default:
return nil, fmt.Errorf("Multiple private IPs found. Please configure one.")
}
}
// GetPublicIPv6 is used to return the first public IP address
// associated with an interface on the machine
func GetPublicIPv6() (net.IP, error) {
addresses, err := net.InterfaceAddrs()
if err != nil {
return nil, fmt.Errorf("Failed to get interface addresses: %v", err)
}
return getPublicIPv6(addresses)
}
func isUniqueLocalAddress(ip net.IP) bool {
return len(ip) == net.IPv6len && ip[0] == 0xfc && ip[1] == 0x00
}
func getPublicIPv6(addresses []net.Addr) (net.IP, error) {
var candidates []net.IP
// Find public IPv6 address
for _, rawAddr := range addresses {
var ip net.IP
switch addr := rawAddr.(type) {
case *net.IPAddr:
ip = addr.IP
case *net.IPNet:
ip = addr.IP
default:
continue
}
if ip.To4() != nil {
continue
}
if ip.IsLinkLocalUnicast() || isUniqueLocalAddress(ip) || ip.IsLoopback() {
continue
}
candidates = append(candidates, ip)
}
numIps := len(candidates)
switch numIps {
case 0:
return nil, fmt.Errorf("No public IPv6 address found")
case 1:
return candidates[0], nil
default:
return nil, fmt.Errorf("Multiple public IPv6 addresses found. Please configure one.")
}
}
// Converts bytes to an integer
func bytesToUint64(b []byte) uint64 {
return binary.BigEndian.Uint64(b)

186
agent/consul/util_test.go
View File

@ -1,7 +1,6 @@
package consul
import (
"errors"
"fmt"
"net"
"regexp"
@ -14,97 +13,6 @@ import (
"github.com/stretchr/testify/require"
)
func TestGetPrivateIP(t *testing.T) {
t.Parallel()
ip, _, err := net.ParseCIDR("10.1.2.3/32")
if err != nil {
t.Fatalf("failed to parse private cidr: %v", err)
}
pubIP, _, err := net.ParseCIDR("8.8.8.8/32")
if err != nil {
t.Fatalf("failed to parse public cidr: %v", err)
}
tests := []struct {
addrs []net.Addr
expected net.IP
err error
}{
{
addrs: []net.Addr{
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: pubIP,
},
},
expected: ip,
},
{
addrs: []net.Addr{
&net.IPAddr{
IP: pubIP,
},
},
err: errors.New("No private IP address found"),
},
{
addrs: []net.Addr{
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: pubIP,
},
},
err: errors.New("Multiple private IPs found. Please configure one."),
},
}
for _, test := range tests {
ip, err := getPrivateIP(test.addrs)
switch {
case test.err != nil && err != nil:
if err.Error() != test.err.Error() {
t.Fatalf("unexpected error: %v != %v", test.err, err)
}
case (test.err == nil && err != nil) || (test.err != nil && err == nil):
t.Fatalf("unexpected error: %v != %v", test.err, err)
default:
if !test.expected.Equal(ip) {
t.Fatalf("unexpected ip: %v != %v", ip, test.expected)
}
}
}
}
func TestIsPrivateIP(t *testing.T) {
t.Parallel()
if !isPrivateIP("192.168.1.1") {
t.Fatalf("bad")
}
if !isPrivateIP("172.16.45.100") {
t.Fatalf("bad")
}
if !isPrivateIP("10.1.2.3") {
t.Fatalf("bad")
}
if !isPrivateIP("100.115.110.19") {
t.Fatalf("bad")
}
if isPrivateIP("8.8.8.8") {
t.Fatalf("bad")
}
if !isPrivateIP("127.0.0.1") {
t.Fatalf("bad")
}
}
func TestUtil_CanServersUnderstandProtocol(t *testing.T) {
t.Parallel()
var members []serf.Member
@ -245,100 +153,6 @@ func TestGenerateUUID(t *testing.T) {
}
}
func TestGetPublicIPv6(t *testing.T) {
t.Parallel()
ip, _, err := net.ParseCIDR("fe80::1/128")
if err != nil {
t.Fatalf("failed to parse link-local cidr: %v", err)
}
ip2, _, err := net.ParseCIDR("::1/128")
if err != nil {
t.Fatalf("failed to parse loopback cidr: %v", err)
}
ip3, _, err := net.ParseCIDR("fc00::1/128")
if err != nil {
t.Fatalf("failed to parse ULA cidr: %v", err)
}
pubIP, _, err := net.ParseCIDR("2001:0db8:85a3::8a2e:0370:7334/128")
if err != nil {
t.Fatalf("failed to parse public cidr: %v", err)
}
tests := []struct {
addrs []net.Addr
expected net.IP
err error
}{
{
addrs: []net.Addr{
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: ip2,
},
&net.IPAddr{
IP: ip3,
},
&net.IPAddr{
IP: pubIP,
},
},
expected: pubIP,
},
{
addrs: []net.Addr{
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: ip2,
},
&net.IPAddr{
IP: ip3,
},
},
err: errors.New("No public IPv6 address found"),
},
{
addrs: []net.Addr{
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: ip,
},
&net.IPAddr{
IP: pubIP,
},
&net.IPAddr{
IP: pubIP,
},
},
err: errors.New("Multiple public IPv6 addresses found. Please configure one."),
},
}
for _, test := range tests {
ip, err := getPublicIPv6(test.addrs)
switch {
case test.err != nil && err != nil:
if err.Error() != test.err.Error() {
t.Fatalf("unexpected error: %v != %v", test.err, err)
}
case (test.err == nil && err != nil) || (test.err != nil && err == nil):
t.Fatalf("unexpected error: %v != %v", test.err, err)
default:
if !test.expected.Equal(ip) {
t.Fatalf("unexpected ip: %v != %v", ip, test.expected)
}
}
}
}
type testServersProvider []metadata.Server
func (p testServersProvider) CheckServers(datacenter string, fn func(*metadata.Server) bool) {