Method

GioResolverlookup_service

since: 2.22

Declaration 

GList*
g_resolver_lookup_service (
  GResolver* resolver,
  const gchar* service,
  const gchar* protocol,
  const gchar* domain,
  GCancellable* cancellable,
  GError** error
)

Description

Synchronously performs a DNS SRV lookup for the given service and protocol in the given domain and returns an array of GSrvTarget. domain may be an ASCII-only or UTF-8 hostname. Note also that the service and protocol arguments do not include the leading underscore that appears in the actual DNS entry.

On success, g_resolver_lookup_service() will return a non-empty GList of GSrvTarget, sorted in order of preference. (That is, you should attempt to connect to the first target first, then the second if the first fails, etc.)

If the DNS resolution fails, error (if non-NULL) will be set to a value from GResolverError and NULL will be returned.

If cancellable is non-NULL, it can be used to cancel the operation, in which case error (if non-NULL) will be set to G_IO_ERROR_CANCELLED.

If you are planning to connect to the service, it is usually easier to create a GNetworkService and use its GSocketConnectable interface.

Available since: 2.22

Parameters

service

Type: const gchar*

The service type to look up (eg, “ldap”)

The data is owned by the caller of the function.
The value is a NUL terminated UTF-8 string.
protocol

Type: const gchar*

The networking protocol to use for service (eg, “tcp”)

The data is owned by the caller of the function.
The value is a NUL terminated UTF-8 string.
domain

Type: const gchar*

The DNS domain to look up the service in.

The data is owned by the caller of the function.
The value is a NUL terminated UTF-8 string.
cancellable

Type: GCancellable

A GCancellable, or NULL.

The argument can be NULL.
The data is owned by the caller of the function.
error

Type: GError **

The return location for a recoverable error.

The argument can be NULL.
If the return location is not NULL, then you must initialize it to a NULL GError*.
The argument will left initialized to NULL by the method if there are no errors.
In case of error, the argument will be set to a newly allocated GError; the caller will take ownership of the data, and be responsible for freeing it.

Return value

Type: A list of None

A non-empty GList of GSrvTarget, or NULL on error. You must free each of the targets and the list when you are done with it. (You can use g_resolver_free_targets() to do this.)

The caller of the method takes ownership of the data, and is responsible for freeing it.