dns

package

v0.0.0-...-99ef61b Latest Latest Go to latest Published: Oct 26, 2022 License: MIT Imports: 25 Imported by: 1

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Repository

github.com/wwqdrh/nettool

Documentation ¶

Rendered for

Index ¶

Constants
Variables
func ArrayEquals(src, target []string) bool
func Contains(container any, target any) bool
func CreateDirIfNotExist(dir string) error
func GetDnsRR(domain string)
func GetLocalDomains() string
func GetNameServer() string
func GetRandomTcpPort() int
func HandleExtraDomainMapping(extraDomains map[string]string, localDnsPort int)
func IsDomainNotExist(err error) bool
func IsValidIp(ip string) bool
func NewDnsResolve(opts ...dnsResolveOpt) dnsResolve
func NsLookup(domain string, qtype uint16, net, dnsServerAddr string) (*dns.Msg, error)
func RandomPort() int
func ReadCache(domain string, qtype uint16, ttl int64) []dns.RR
func RestoreNameServer()
func SetNameServer(dnsServer string, dnsMode string) error
func SetupDnsServer(dnsHandler dns.Handler, port int, net string) error
func SetupLocalDns(remoteDnsPort, localDnsPort int, dnsOrder []string, ttl int64) error
func WithEscape(add, remove string) dnsResolveOpt
func WithResolveConf(resolve string) dnsResolveOpt
func WriteCache(domain string, qtype uint16, answer []dns.RR, timestamp int64)
type DnsServer
- func (s *DnsServer) ServeDNS(w dns.ResponseWriter, req *dns.Msg)
type DomainNotExistError
- func (e DomainNotExistError) Error() string
type IDns
- func NewDnsServer(a arecord, rtr rtrrecord, port int) IDns
type NsEntry

Constants ¶

View Source

const (
	StandardDnsPort    = 53
	AlternativeDnsPort = 10053
)

View Source

const IpAddrPattern = "[0-9]+\\.[0-9]+\\.[0-9]+\\.[0-9]+"

Variables ¶

View Source

var (
	DnsResolve = NewDnsResolve(WithEscape(
		" # Added by NetTool", " # Removed by NetTool",
	))

	Iptables = iptables.NewIptablesRule()
)

View Source

var (
	// DnsOrderCluster proxy to cluster dns
	DnsOrderCluster = "cluster"
	// DnsOrderUpstream proxy to upstream dns
	DnsOrderUpstream = "upstream"
)

View Source

var (
	FieldNameserver = "nameserver"
	FieldDomain     = "domain"
	FieldSearch     = "search"
)

View Source

var (
	ResolvConf = "/etc/resolv.conf"
)

Functions ¶

func ArrayEquals ¶

func ArrayEquals(src, target []string) bool

func Contains ¶

func Contains(container any, target any) bool

Contains check whether target exist in container, the type of container can be an array, slice or map

func CreateDirIfNotExist ¶

func CreateDirIfNotExist(dir string) error

CreateDirIfNotExist create dir

func GetDnsRR ¶

func GetDnsRR(domain string)

func GetLocalDomains ¶

func GetLocalDomains() string

GetLocalDomains get domain search postfixes

func GetNameServer ¶

func GetNameServer() string

GetNameServer get primary dns server

func GetRandomTcpPort ¶

func GetRandomTcpPort() int

GetRandomTcpPort get pod random ssh port

func HandleExtraDomainMapping ¶

func HandleExtraDomainMapping(extraDomains map[string]string, localDnsPort int)

HandleExtraDomainMapping handle extra domain change

func IsDomainNotExist ¶

func IsDomainNotExist(err error) bool

IsDomainNotExist check the error type

func IsValidIp ¶

func IsValidIp(ip string) bool

func NewDnsResolve ¶

func NewDnsResolve(opts ...dnsResolveOpt) dnsResolve

func NsLookup ¶

func NsLookup(domain string, qtype uint16, net, dnsServerAddr string) (*dns.Msg, error)

NsLookup query domain record, dnsServerAddr use '<ip>:<port>' format

func RandomPort ¶

func RandomPort() int

func ReadCache ¶

func ReadCache(domain string, qtype uint16, ttl int64) []dns.RR

ReadCache fetch from cache

func RestoreNameServer ¶

func RestoreNameServer()

RestoreNameServer remove the nameservers added by ktctl

func SetNameServer ¶

func SetNameServer(dnsServer string, dnsMode string) error

SetNameServer set dns server records

func SetupDnsServer ¶

func SetupDnsServer(dnsHandler dns.Handler, port int, net string) error

SetupDnsServer start dns server on specified port

func SetupLocalDns ¶

func SetupLocalDns(remoteDnsPort, localDnsPort int, dnsOrder []string, ttl int64) error

func WithEscape ¶

func WithEscape(add, remove string) dnsResolveOpt

func WithResolveConf ¶

func WithResolveConf(resolve string) dnsResolveOpt

func WriteCache ¶

func WriteCache(domain string, qtype uint16, answer []dns.RR, timestamp int64)

WriteCache record to cache

Types ¶

type DnsServer ¶

type DnsServer struct {
	// contains filtered or unexported fields
}

func (*DnsServer) ServeDNS ¶

func (s *DnsServer) ServeDNS(w dns.ResponseWriter, req *dns.Msg)

ServeDNS query DNS record

type DomainNotExistError ¶

type DomainNotExistError struct {
	// contains filtered or unexported fields
}

DomainNotExistError ...

func (DomainNotExistError) Error ¶

func (e DomainNotExistError) Error() string

type IDns ¶

type IDns interface {
	Server(context.Context) error
}

func NewDnsServer ¶

func NewDnsServer(a arecord, rtr rtrrecord, port int) IDns

type NsEntry ¶

type NsEntry struct {
	// contains filtered or unexported fields
}

Source Files ¶

View all Source files

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