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Merge pull request #640 from github/ipv6

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Parsing ipv6 addresses
This commit is contained in:
Tim Vaillancourt 2020-10-23 12:11:21 +02:00 committed by GitHub
commit e99b915cf5
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 106 additions and 14 deletions
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2
go/logic/migrator.go
View File

@ -741,7 +741,7 @@ func (this *Migrator) initiateInspector() (err error) {
this.migrationContext.Log.Infof("Master found to be %+v", *this.migrationContext.ApplierConnectionConfig.ImpliedKey)
} else {
// Forced master host.
key, err := mysql.ParseRawInstanceKeyLoose(this.migrationContext.AssumeMasterHostname)
key, err := mysql.ParseInstanceKey(this.migrationContext.AssumeMasterHostname)
if err != nil {
return err
}

42
go/mysql/instance_key.go
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@ -7,6 +7,7 @@ package mysql
import (
"fmt"
"regexp"
"strconv"
"strings"
)
@ -15,6 +16,13 @@ const (
DefaultInstancePort = 3306
)
var (
ipv4HostPortRegexp = regexp.MustCompile("^([^:]+):([0-9]+)$")
ipv4HostRegexp = regexp.MustCompile("^([^:]+)$")
ipv6HostPortRegexp = regexp.MustCompile("^\\[([:0-9a-fA-F]+)\\]:([0-9]+)$") // e.g. [2001:db8:1f70::999:de8:7648:6e8]:3308
ipv6HostRegexp = regexp.MustCompile("^([:0-9a-fA-F]+)$") // e.g. 2001:db8:1f70::999:de8:7648:6e8
)
// InstanceKey is an instance indicator, identified by hostname and port
type InstanceKey struct {
Hostname string
@ -25,25 +33,35 @@ const detachHint = "//"
// ParseInstanceKey will parse an InstanceKey from a string representation such as 127.0.0.1:3306
func NewRawInstanceKey(hostPort string) (*InstanceKey, error) {
tokens := strings.SplitN(hostPort, ":", 2)
if len(tokens) != 2 {
return nil, fmt.Errorf("Cannot parse InstanceKey from %s. Expected format is host:port", hostPort)
hostname := ""
port := ""
if submatch := ipv4HostPortRegexp.FindStringSubmatch(hostPort); len(submatch) > 0 {
hostname = submatch[1]
port = submatch[2]
} else if submatch := ipv4HostRegexp.FindStringSubmatch(hostPort); len(submatch) > 0 {
hostname = submatch[1]
} else if submatch := ipv6HostPortRegexp.FindStringSubmatch(hostPort); len(submatch) > 0 {
hostname = submatch[1]
port = submatch[2]
} else if submatch := ipv6HostRegexp.FindStringSubmatch(hostPort); len(submatch) > 0 {
hostname = submatch[1]
} else {
return nil, fmt.Errorf("Cannot parse address: %s", hostPort)
}
instanceKey := &InstanceKey{Hostname: tokens[0]}
var err error
if instanceKey.Port, err = strconv.Atoi(tokens[1]); err != nil {
return instanceKey, fmt.Errorf("Invalid port: %s", tokens[1])
instanceKey := &InstanceKey{Hostname: hostname, Port: DefaultInstancePort}
if port != "" {
var err error
if instanceKey.Port, err = strconv.Atoi(port); err != nil {
return instanceKey, fmt.Errorf("Invalid port: %s", port)
}
}
return instanceKey, nil
}
// ParseRawInstanceKeyLoose will parse an InstanceKey from a string representation such as 127.0.0.1:3306.
// ParseInstanceKey will parse an InstanceKey from a string representation such as 127.0.0.1:3306.
// The port part is optional; there will be no name resolve
func ParseRawInstanceKeyLoose(hostPort string) (*InstanceKey, error) {
if !strings.Contains(hostPort, ":") {
return &InstanceKey{Hostname: hostPort, Port: DefaultInstancePort}, nil
}
func ParseInstanceKey(hostPort string) (*InstanceKey, error) {
return NewRawInstanceKey(hostPort)
}

2
go/mysql/instance_key_map.go
View File

@ -92,7 +92,7 @@ func (this *InstanceKeyMap) ReadCommaDelimitedList(list string) error {
}
tokens := strings.Split(list, ",")
for _, token := range tokens {
key, err := ParseRawInstanceKeyLoose(token)
key, err := ParseInstanceKey(token)
if err != nil {
return err
}

74
go/mysql/instance_key_test.go Normal file
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@ -0,0 +1,74 @@
/*
Copyright 2016 GitHub Inc.
See https://github.com/github/gh-ost/blob/master/LICENSE
*/
package mysql
import (
"testing"
"github.com/outbrain/golib/log"
test "github.com/outbrain/golib/tests"
)
func init() {
log.SetLevel(log.ERROR)
}
func TestParseInstanceKey(t *testing.T) {
{
key, err := ParseInstanceKey("myhost:1234")
test.S(t).ExpectNil(err)
test.S(t).ExpectEquals(key.Hostname, "myhost")
test.S(t).ExpectEquals(key.Port, 1234)
}
{
key, err := ParseInstanceKey("myhost")
test.S(t).ExpectNil(err)
test.S(t).ExpectEquals(key.Hostname, "myhost")
test.S(t).ExpectEquals(key.Port, 3306)
}
{
key, err := ParseInstanceKey("10.0.0.3:3307")
test.S(t).ExpectNil(err)
test.S(t).ExpectEquals(key.Hostname, "10.0.0.3")
test.S(t).ExpectEquals(key.Port, 3307)
}
{
key, err := ParseInstanceKey("10.0.0.3")
test.S(t).ExpectNil(err)
test.S(t).ExpectEquals(key.Hostname, "10.0.0.3")
test.S(t).ExpectEquals(key.Port, 3306)
}
{
key, err := ParseInstanceKey("[2001:db8:1f70::999:de8:7648:6e8]:3308")
test.S(t).ExpectNil(err)
test.S(t).ExpectEquals(key.Hostname, "2001:db8:1f70::999:de8:7648:6e8")
test.S(t).ExpectEquals(key.Port, 3308)
}
{
key, err := ParseInstanceKey("::1")
test.S(t).ExpectNil(err)
test.S(t).ExpectEquals(key.Hostname, "::1")
test.S(t).ExpectEquals(key.Port, 3306)
}
{
key, err := ParseInstanceKey("0:0:0:0:0:0:0:0")
test.S(t).ExpectNil(err)
test.S(t).ExpectEquals(key.Hostname, "0:0:0:0:0:0:0:0")
test.S(t).ExpectEquals(key.Port, 3306)
}
{
_, err := ParseInstanceKey("[2001:xxxx:1f70::999:de8:7648:6e8]:3308")
test.S(t).ExpectNotNil(err)
}
{
_, err := ParseInstanceKey("10.0.0.4:")
test.S(t).ExpectNotNil(err)
}
{
_, err := ParseInstanceKey("10.0.0.4:5.6.7")
test.S(t).ExpectNotNil(err)
}
}