dns

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v0.0.0-...-b1713d8 Latest Latest Go to latest Published: Jan 15, 2019 License: BSD-3-Clause Imports: 13 Imported by: 2

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Repository

github.com/fcavani/net

Documentation ¶

Rendered for

Overview ¶

Resolve host name stuff.

Index ¶

Constants
Variables
func LookupHost(host string) (addrs []string, err error)
func LookupHostNoCache(host string) (addrs []string, err error)
func LookupHostWithServers(host string, servers []string, attempts, timeout int) (addrs []string, err error)
func LookupIp(ip string) (host string, err error)
func MulticastDNSAllInterfaces() error
func MulticastDNSResolverConfig(ifs []net.Interface) error
func Resolve(h string) (out string, err error)
func ResolveUrl(url *url.URL) (*url.URL, error)
type Cache
- func (c *Cache) Close() error
- func (c *Cache) Get(key string) *Host
- func (c *Cache) PutAddrs(key string, ips []string) error
- func (c *Cache) PutPtr(key, ptr string) error
- func (c *Cache) PutServFail(key string) error
type Cacher
- func NewCache(s Storer, d, cleanup time.Duration) Cacher
type Host
- func (h *Host) ReturnAddrs() ([]string, error)
- func (h *Host) ReturnPtr() (string, error)
type Mem
- func (m *Mem) Del(key string) error
- func (m *Mem) Get(key string) (*Host, error)
- func (m *Mem) Iter(f func(key string, data *Host) error) error
- func (m *Mem) Put(key string, data *Host) error
type Storer
- func NewMem() Storer

Constants ¶

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const ErrCantResolve = "can't resolve the address"

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const ErrDupEntry = "duplicated entry"

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const ErrHostNotResolved = "host name not resolved"

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const ErrIterStop = "iter stop"

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const ErrNotFound = "entry not found"

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const ErrServFail = "serv fail"

Variables ¶

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var ConfigurationFile = "/etc/resolv.conf"

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var DefaultExpire = 24 * 60 * 60 * time.Second

Time of life of one entry, in seconds. Is query is a hit this time is reseted.

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var DialTimeout = 10 * time.Second

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var ReadTimeout = 500 * time.Millisecond

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var Sleep = 3600 * time.Second

Time between the cleanup of the cache. Old entries are removed. In seconds.

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var Timeout = 5 //Seconds

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var WriteTimeout = 500 * time.Millisecond

Functions ¶

func LookupHost ¶

func LookupHost(host string) (addrs []string, err error)

func LookupHostNoCache ¶

func LookupHostNoCache(host string) (addrs []string, err error)

func LookupHostWithServers ¶

func LookupHostWithServers(host string, servers []string, attempts, timeout int) (addrs []string, err error)

func LookupIp ¶

func LookupIp(ip string) (host string, err error)

func MulticastDNSAllInterfaces ¶

func MulticastDNSAllInterfaces() error

func MulticastDNSResolverConfig ¶

func MulticastDNSResolverConfig(ifs []net.Interface) error

func Resolve ¶

func Resolve(h string) (out string, err error)

Resolve simple resolver one host name to one ip

func ResolveUrl ¶

func ResolveUrl(url *url.URL) (*url.URL, error)

ResolveUrl replaces the host name with the ip address. Supports ipv4 and ipv6. If use in the place of host a path or a scheme for sockets, file or unix, ResolveUrl will only copy the url.

Types ¶

type Cache ¶

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

func (*Cache) Close ¶

func (c *Cache) Close() error

func (*Cache) Get ¶

func (c *Cache) Get(key string) *Host

func (*Cache) PutAddrs ¶

func (c *Cache) PutAddrs(key string, ips []string) error

func (*Cache) PutPtr ¶

func (c *Cache) PutPtr(key, ptr string) error

func (*Cache) PutServFail ¶

func (c *Cache) PutServFail(key string) error

type Cacher ¶

type Cacher interface {
	Get(key string) *Host
	PutAddrs(key string, ips []string) error
	PutPtr(key, ptr string) error
	PutServFail(key string) error
	Close() error
}

func NewCache ¶

func NewCache(s Storer, d, cleanup time.Duration) Cacher

type Host ¶

type Host struct {
	Addrs    []string
	ServFail bool
	Expire   time.Time
}

func (*Host) ReturnAddrs ¶

func (h *Host) ReturnAddrs() ([]string, error)

func (*Host) ReturnPtr ¶

func (h *Host) ReturnPtr() (string, error)

type Mem ¶

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

func (*Mem) Del ¶

func (m *Mem) Del(key string) error

func (*Mem) Get ¶

func (m *Mem) Get(key string) (*Host, error)

func (*Mem) Iter ¶

func (m *Mem) Iter(f func(key string, data *Host) error) error

func (*Mem) Put ¶

func (m *Mem) Put(key string, data *Host) error

type Storer ¶

type Storer interface {
	Get(key string) (*Host, error)
	Put(key string, data *Host) error
	Del(key string) error
	Iter(f func(key string, data *Host) error) error
}

func NewMem ¶

func NewMem() Storer

Source Files ¶

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