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Add preferred network offload (PNO) functionality

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"SET pno <1/0>" ctrl_iface command can now be used to start/stop PNO
with sched_scan driver commands. This will request offloading of
scanning to find any of the enabled networks in the configuration.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>
This commit is contained in:
Jouni Malinen 2011-11-28 16:32:44 +02:00 committed by Jouni Malinen
parent 7c6a266ced
commit b5c6831201
2 changed files with 76 additions and 0 deletions
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74
wpa_supplicant/ctrl_iface.c
View File

@ -50,6 +50,75 @@ static int wpa_supplicant_global_iface_interfaces(struct wpa_global *global,
char *buf, int len);
static int pno_start(struct wpa_supplicant *wpa_s)
{
int ret;
size_t i, num_ssid;
struct wpa_ssid *ssid;
struct wpa_driver_scan_params params;
if (wpa_s->pno)
return 0;
os_memset(&params, 0, sizeof(params));
num_ssid = 0;
ssid = wpa_s->conf->ssid;
while (ssid) {
if (!ssid->disabled)
num_ssid++;
ssid = ssid->next;
}
if (num_ssid > WPAS_MAX_SCAN_SSIDS) {
wpa_printf(MSG_DEBUG, "PNO: Use only the first %u SSIDs from "
"%u", WPAS_MAX_SCAN_SSIDS, (unsigned int) num_ssid);
num_ssid = WPAS_MAX_SCAN_SSIDS;
}
if (num_ssid == 0) {
wpa_printf(MSG_DEBUG, "PNO: No configured SSIDs");
return -1;
}
params.filter_ssids = os_malloc(sizeof(struct wpa_driver_scan_filter) *
num_ssid);
if (params.filter_ssids == NULL)
return -1;
i = 0;
while (ssid) {
if (!ssid->disabled) {
params.ssids[i].ssid = ssid->ssid;
params.ssids[i].ssid_len = ssid->ssid_len;
params.num_ssids++;
os_memcpy(params.filter_ssids[i].ssid, ssid->ssid,
ssid->ssid_len);
params.filter_ssids[i].ssid_len = ssid->ssid_len;
params.num_filter_ssids++;
i++;
if (i == num_ssid)
break;
}
ssid = ssid->next;
}
ret = wpa_drv_sched_scan(wpa_s, &params, 10 * 1000);
os_free(params.filter_ssids);
if (ret == 0)
wpa_s->pno = 1;
return ret;
}
static int pno_stop(struct wpa_supplicant *wpa_s)
{
if (wpa_s->pno) {
wpa_s->pno = 0;
return wpa_drv_stop_sched_scan(wpa_s);
}
return 0;
}
static int wpa_supplicant_ctrl_iface_set(struct wpa_supplicant *wpa_s,
char *cmd)
{
@ -128,6 +197,11 @@ static int wpa_supplicant_ctrl_iface_set(struct wpa_supplicant *wpa_s,
ret = -1;
wpa_tdls_enable(wpa_s->wpa, !disabled);
#endif /* CONFIG_TDLS */
} else if (os_strcasecmp(cmd, "pno") == 0) {
if (atoi(value))
ret = pno_start(wpa_s);
else
ret = pno_stop(wpa_s);
} else {
value[-1] = '=';
ret = wpa_config_process_global(wpa_s->conf, cmd, -1);

2
wpa_supplicant/wpa_supplicant_i.h
View File

@ -510,6 +510,8 @@ struct wpa_supplicant {
u16 num_modes;
u16 flags;
} hw;
int pno;
};