Allow passive scan to be requested with SCAN passive=1

This allows external programs to request wpa_supplicant to execute
a passive scan (i.e., do not send any Probe Request frames).

Signed-hostap: Jouni Malinen <j@w1.fi>

diff --git a/wpa_supplicant/ctrl_iface.c b/wpa_supplicant/ctrl_iface.c
index e424c6f..8518d4b 100644 (file)
--- a/wpa_supplicant/ctrl_iface.c
+++ b/wpa_supplicant/ctrl_iface.c
@@ -5263,6 +5263,8 @@ static void wpas_ctrl_scan(struct wpa_supplicant *wpa_s, char *params,
                return;
        }
 
+       wpa_s->manual_scan_passive = 0;
+
        if (params) {
                if (os_strncasecmp(params, "TYPE=ONLY", 9) == 0)
                        wpa_s->scan_res_handler = scan_only_handler;
@@ -5272,6 +5274,10 @@ static void wpas_ctrl_scan(struct wpa_supplicant *wpa_s, char *params,
                        *reply_len = -1;
                        return;
                }
+
+               pos = os_strstr(params, "passive=");
+               if (pos)
+                       wpa_s->manual_scan_passive = !!atoi(pos + 8);
        } else {
                os_free(wpa_s->manual_scan_freqs);
                wpa_s->manual_scan_freqs = NULL;

diff --git a/wpa_supplicant/scan.c b/wpa_supplicant/scan.c
index c22ffbf..d963452 100644 (file)
--- a/wpa_supplicant/scan.c
+++ b/wpa_supplicant/scan.c
@@ -698,6 +698,9 @@ static void wpa_supplicant_scan(void *eloop_ctx, void *timeout_ctx)
                wpa_dbg(wpa_s, MSG_DEBUG, "Include wildcard SSID in "
                        "the scan request");
                params.num_ssids++;
+       } else if (wpa_s->last_scan_req == MANUAL_SCAN_REQ &&
+                  wpa_s->manual_scan_passive && params.num_ssids == 0) {
+               wpa_dbg(wpa_s, MSG_DEBUG, "Use passive scan based on manual request");
        } else {
                wpa_s->prev_scan_ssid = WILDCARD_SSID_SCAN;
                params.num_ssids++;

diff --git a/wpa_supplicant/wpa_supplicant_i.h b/wpa_supplicant/wpa_supplicant_i.h
index 5194e34..ebe30e4 100644 (file)
--- a/wpa_supplicant/wpa_supplicant_i.h
+++ b/wpa_supplicant/wpa_supplicant_i.h
@@ -482,6 +482,7 @@ struct wpa_supplicant {
        int scan_runs; /* number of scan runs since WPS was started */
        int *next_scan_freqs;
        int *manual_scan_freqs;
+       unsigned int manual_scan_passive:1;
        int scan_interval; /* time in sec between scans to find suitable AP */
        int normal_scans; /* normal scans run before sched_scan */
        int scan_for_connection; /* whether the scan request was triggered for