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gsocketclient: Rename ‘connection timeout’ to ‘connection delay’

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This makes it match the terminology from RFC 8305 better, which refers
to a ‘connection attempt delay’. This is a delay because it determines
the spacing between trying additional connection attempts. It’s not a
timeout because it shouldn’t cause cancellation of any ongoing
connection attempts.

This commit introduces no functional changes.

Signed-off-by: Philip Withnall <pwithnall@gnome.org>
This commit is contained in:
Philip Withnall 2023-11-29 15:50:03 +00:00
parent a581de2ee7
commit ac6864ded7
1 changed files with 17 additions and 15 deletions
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32
gio/gsocketclient.c
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@ -60,8 +60,10 @@
/* As recommended by RFC 8305 this is the time it waits
* on a connection before starting another concurrent attempt.
*
* See https://datatracker.ietf.org/doc/html/rfc8305#section-8
*/
#define HAPPY_EYEBALLS_CONNECTION_ATTEMPT_TIMEOUT_MS 250
#define HAPPY_EYEBALLS_CONNECTION_ATTEMPT_DELAY_MS 250
/**
* GSocketClient:
@ -1539,7 +1541,7 @@ typedef struct
GIOStream *connection;
GProxyAddress *proxy_addr;
GSocketClientAsyncConnectData *data; /* unowned */
GSource *timeout_source;
GSource *delay_timeout_source; /* (owned) */
GCancellable *cancellable;
GCancellable *task_cancellable; /* (owned); this is equal to g_task_get_cancellable (ConnectionAttempt.data->task), but with a longer lifetime */
gulong cancelled_id;
@ -1575,10 +1577,10 @@ connection_attempt_unref (gpointer pointer)
attempt->cancelled_id = 0;
g_clear_object (&attempt->cancellable);
g_clear_object (&attempt->proxy_addr);
if (attempt->timeout_source)
if (attempt->delay_timeout_source)
{
g_source_destroy (attempt->timeout_source);
g_source_unref (attempt->timeout_source);
g_source_destroy (attempt->delay_timeout_source);
g_source_unref (attempt->delay_timeout_source);
}
g_free (attempt);
}
@ -1933,10 +1935,10 @@ g_socket_client_connected_callback (GObject *source,
return;
}
if (attempt->timeout_source)
if (attempt->delay_timeout_source)
{
g_source_destroy (attempt->timeout_source);
g_clear_pointer (&attempt->timeout_source, g_source_unref);
g_source_destroy (attempt->delay_timeout_source);
g_clear_pointer (&attempt->delay_timeout_source, g_source_unref);
}
if (!g_socket_connection_connect_finish (G_SOCKET_CONNECTION (source),
@ -1979,17 +1981,17 @@ g_socket_client_connected_callback (GObject *source,
}
static gboolean
on_connection_attempt_timeout (gpointer data)
on_connection_attempt_delay_reached (gpointer data)
{
ConnectionAttempt *attempt = data;
if (!attempt->data->enumeration_completed)
{
g_debug ("GSocketClient: Timeout reached, trying another enumeration");
g_debug ("GSocketClient: Connection attempt delay reached, trying another enumeration");
enumerator_next_async (attempt->data, TRUE);
}
g_clear_pointer (&attempt->timeout_source, g_source_unref);
g_clear_pointer (&attempt->delay_timeout_source, g_source_unref);
return G_SOURCE_REMOVE;
}
@ -2073,7 +2075,7 @@ g_socket_client_enumerator_callback (GObject *object,
attempt->address = address;
attempt->cancellable = g_cancellable_new ();
attempt->connection = (GIOStream *)g_socket_connection_factory_create_connection (socket);
attempt->timeout_source = g_timeout_source_new (HAPPY_EYEBALLS_CONNECTION_ATTEMPT_TIMEOUT_MS);
attempt->delay_timeout_source = g_timeout_source_new (HAPPY_EYEBALLS_CONNECTION_ATTEMPT_DELAY_MS);
g_debug ("%s: starting connection attempt %p for GSocketClientAsyncConnectData %p",
G_STRFUNC, attempt, data);
@ -2081,8 +2083,8 @@ g_socket_client_enumerator_callback (GObject *object,
if (G_IS_PROXY_ADDRESS (address) && data->client->priv->enable_proxy)
attempt->proxy_addr = g_object_ref (G_PROXY_ADDRESS (address));
g_source_set_callback (attempt->timeout_source, on_connection_attempt_timeout, attempt, NULL);
g_source_attach (attempt->timeout_source, g_task_get_context (data->task));
g_source_set_callback (attempt->delay_timeout_source, on_connection_attempt_delay_reached, attempt, NULL);
g_source_attach (attempt->delay_timeout_source, g_task_get_context (data->task));
data->connection_attempts = g_slist_append (data->connection_attempts, connection_attempt_ref (attempt));
if (g_task_get_cancellable (data->task))
@ -2178,7 +2180,7 @@ g_socket_client_connect_async (GSocketClient *client,
- Each connection is independent and kept in a ConnectionAttempt object.
- They each hold a ref on the main task and have their own cancellable.
- Multiple attempts may happen in parallel as per Happy Eyeballs.
- Upon failure or timeouts more connection attempts are made.
- Upon failure or attempt delays being reached more connection attempts are made.
- If no connections succeed the task errors.
- Upon success they are kept in a list of successful connections.