Begins asynchronously resolving hostname to determine its associated IP address(es), and eventually calls callback
, which must call lookup_by_name_async.end to get the result.
See lookup_by_name for more details.
| this |
a Resolver |
| hostname |
the hostname to look up the address of |
| cancellable |
a Cancellable, or null |
| callback |
callback to call after resolution completes |
| user_data |
data for |