Inherits: Object

Inherited By: IP_Unix

Category: Core

Brief Description

Internet protocol (IP) support functions like DNS resolution.

Member Functions

void clear_cache ( String hostname=”” )
void erase_resolve_item ( int id )
Array get_local_addresses ( ) const
String get_resolve_item_address ( int id ) const
ResolverStatus get_resolve_item_status ( int id ) const
String resolve_hostname ( String host, Type ip_type=3 )
int resolve_hostname_queue_item ( String host, Type ip_type=3 )

Numeric Constants

  • RESOLVER_MAX_QUERIES = 32 — Maximum number of concurrent DNS resolver queries allowed, RESOLVER_INVALID_ID is returned if exceeded.
  • RESOLVER_INVALID_ID = -1 — Invalid ID constant. Returned if RESOLVER_MAX_QUERIES is exceeded.


enum ResolverStatus

  • RESOLVER_STATUS_NONE = 0 — DNS hostname resolver status: No status.
  • RESOLVER_STATUS_WAITING = 1 — DNS hostname resolver status: Waiting.
  • RESOLVER_STATUS_DONE = 2 — DNS hostname resolver status: Done.
  • RESOLVER_STATUS_ERROR = 3 — DNS hostname resolver status: Error.

enum Type

  • TYPE_NONE = 0 — Address type: None.
  • TYPE_IPV4 = 1 — Address type: Internet protocol version 4 (IPv4).
  • TYPE_IPV6 = 2 — Address type: Internet protocol version 6 (IPv6).
  • TYPE_ANY = 3 — Address type: Any.


IP contains support functions for the Internet Protocol (IP). TCP/IP support is in different classes (see StreamPeerTCP and TCP_Server). IP provides DNS hostname resolution support, both blocking and threaded.

Member Function Description

  • void clear_cache ( String hostname=”” )

Removes all of a “hostname“‘s cached references. If no “hostname” is given then all cached IP addresses are removed.

  • void erase_resolve_item ( int id )

Removes a given item “id” from the queue. This should be used to free a queue after it has completed to enable more queries to happen.

  • Array get_local_addresses ( ) const

Returns all of the user’s current IPv4 and IPv6 addresses as an array.

  • String get_resolve_item_address ( int id ) const

Returns a queued hostname’s IP address, given its queue “id”. Returns an empty string on error or if resolution hasn’t happened yet (see get_resolve_item_status).

Returns a queued hostname’s status as a RESOLVER_STATUS_* constant, given its queue “id”.

Returns a given hostname’s IPv4 or IPv6 address when resolved (blocking-type method). The address type returned depends on the TYPE_* constant given as “ip_type”.

  • int resolve_hostname_queue_item ( String host, Type ip_type=3 )

Creates a queue item to resolve a hostname to an IPv4 or IPv6 address depending on the TYPE_* constant given as “ip_type”. Returns the queue ID if successful, or RESOLVER_INVALID_ID on error.