Add ip_filter type

lib/ex_ice/ice_agent.ex

@@ -42,13 +42,18 @@ defmodule ExICE.ICEAgent do
  | {:data, binary()}
  | {:new_candidate, String.t()}}
 
+ @typedoc """
+ Filter applied when gathering host candidates.
+ """
+ @type ip_filter() :: (:inet.ip_address() -> boolean)
+
  @typedoc """
  ICE Agent configuration options.
  All notifications are by default sent to a process that spawns `ExICE`.
  This behavior can be overwritten using the following options.
 
- * `ip_filter` - filter applied when gathering local candidates
- * `ports` - ports that will be used when gathering local candidates, otherwise the ports are chosen by the OS
+ * `ip_filter` - filter applied when gathering host candidates
+ * `ports` - ports that will be used when gathering host candidates, otherwise the ports are chosen by the OS
  * `ice_servers` - list of STUN/TURN servers
  * `ice_transport_policy` - candidate types to be used.
  * `all` - all ICE candidates will be considered (default).
@@ -62,7 +67,7 @@ defmodule ExICE.ICEAgent do
  however, remote relay candidates work correctly.
  """
  @type opts() :: [
- ip_filter: (:inet.ip_address() -> boolean),
+ ip_filter: ip_filter(),
  ports: Enumerable.t(non_neg_integer()),
  ice_servers: [
  %{