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station: add Roam() diagnostics method

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This is being added as a developer method and should not be used
in production. For testing purposes though, it is quite useful as
it forces IWD to roam to a provided BSS and bypasses IWD's roaming
and ranking logic for choosing a roam candidate.

To use this a BSSID is provided as the only parameter. If this
BSS is not in IWD's current scan results -EINVAL will be returned.
If IWD knows about the BSS it will attempt to roam to it whether
that is via FT, FT-over-DS, or Reassociation. These details are
still sorted out in IWDs station_transition_start() logic.
This commit is contained in:
James Prestwood 2021-05-05 11:23:54 -07:00 committed by Denis Kenzior
parent 174c14aefb
commit 694ccf62d0
1 changed files with 37 additions and 0 deletions
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37
src/station.c
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@ -3721,12 +3721,49 @@ static struct l_dbus_message *station_get_diagnostics(struct l_dbus *dbus,
return NULL; return NULL;
} }
static struct l_dbus_message *station_force_roam(struct l_dbus *dbus,
struct l_dbus_message *message,
void *user_data)
{
struct station *station = user_data;
struct scan_bss *target;
struct l_dbus_message_iter iter;
uint8_t *mac;
uint32_t mac_len;
if (!l_dbus_message_get_arguments(message, "ay", &iter))
goto invalid_args;
if (!l_dbus_message_iter_get_fixed_array(&iter, &mac, &mac_len))
goto invalid_args;
if (mac_len != 6)
return dbus_error_invalid_args(message);
target = network_bss_find_by_addr(station->connected_network, mac);
if (!target || target == station->connected_bss)
return dbus_error_invalid_args(message);
l_debug("Attempting forced roam to BSS "MAC, MAC_STR(mac));
station_transition_start(station, target);
return l_dbus_message_new_method_return(message);
invalid_args:
return dbus_error_invalid_args(message);
}
static void station_setup_diagnostic_interface( static void station_setup_diagnostic_interface(
struct l_dbus_interface *interface) struct l_dbus_interface *interface)
{ {
l_dbus_interface_method(interface, "GetDiagnostics", 0, l_dbus_interface_method(interface, "GetDiagnostics", 0,
station_get_diagnostics, "a{sv}", "", station_get_diagnostics, "a{sv}", "",
"diagnostics"); "diagnostics");
if (iwd_is_developer_mode())
l_dbus_interface_method(interface, "Roam", 0,
station_force_roam, "", "ay", "mac");
} }
static void station_destroy_diagnostic_interface(void *user_data) static void station_destroy_diagnostic_interface(void *user_data)