dns-4.2.0: DNS library in Haskell
Safe HaskellSafe-Inferred
LanguageHaskell2010

Network.DNS.Types.Resolver

Synopsis

Documentation

data FileOrNumericHost Source #

The type to specify a cache server.

Constructors

RCFilePath FilePath

A path for "resolv.conf" where one or more IP addresses of DNS servers should be found on Unix. Default DNS servers are automatically detected on Windows regardless of the value of the file name.

RCHostName HostName

A numeric IP address. Warning: host names are invalid.

RCHostNames [HostName]

Numeric IP addresses. Warning: host names are invalid.

RCHostPort HostName PortNumber

A numeric IP address and port number. Warning: host names are invalid.

Instances

Instances details
Show FileOrNumericHost Source # 
Instance details

Defined in Network.DNS.Types.Resolver

data CacheConf Source #

Cache configuration for responses.

Constructors

CacheConf 

Fields

  • maximumTTL :: TTL

    If RR's TTL is higher than this value, this value is used instead.

  • pruningDelay :: Int

    Cache pruning interval in seconds.

Instances

Instances details
Show CacheConf Source # 
Instance details

Defined in Network.DNS.Types.Resolver

defaultCacheConf :: CacheConf Source #

Default cache configuration.

>>> defaultCacheConf
CacheConf {maximumTTL = 300, pruningDelay = 10}

data ResolvConf Source #

Type for resolver configuration. Use defaultResolvConf to create a new value.

An example to use Google's public DNS cache instead of resolv.conf:

>>> let conf = defaultResolvConf { resolvInfo = RCHostName "8.8.8.8" }

An example to use multiple Google's public DNS cache concurrently:

>>> let conf = defaultResolvConf { resolvInfo = RCHostNames ["8.8.8.8","8.8.4.4"], resolvConcurrent = True }

An example to disable EDNS:

>>> let conf = defaultResolvConf { resolvQueryControls = ednsEnabled FlagClear }

An example to enable query result caching:

>>> let conf = defaultResolvConf { resolvCache = Just defaultCacheConf }

An example to disable requesting recursive service.

>>> let conf = defaultResolvConf { resolvQueryControls = rdFlag FlagClear }

An example to set the AD bit in all queries by default.

>>> let conf = defaultResolvConf { resolvQueryControls = adFlag FlagSet }

An example to set the both the AD and CD bits in all queries by default.

>>> let conf = defaultResolvConf { resolvQueryControls = adFlag FlagSet <> cdFlag FlagSet }

An example with an EDNS buffer size of 1216 bytes, which is more robust with IPv6, and the DO bit set to request DNSSEC responses.

>>> let conf = defaultResolvConf { resolvQueryControls = ednsSetUdpSize (Just 1216) <> doFlag FlagSet }

Constructors

ResolvConf 

Fields

Instances

Instances details
Show ResolvConf Source # 
Instance details

Defined in Network.DNS.Types.Resolver

defaultResolvConf :: ResolvConf Source #

Return a default ResolvConf:

data ResolvSeed Source #

Intermediate abstract data type for resolvers. IP address information of DNS servers is generated according to resolvInfo internally. This value can be safely reused for withResolver.

The naming is confusing for historical reasons.

data Resolver Source #

Abstract data type of DNS Resolver. This includes newly seeded identifier generators for all specified DNS servers and a cache database.