P2P: Expose driver preferred frequency list fetch to P2P

This adds a callback function that can be used from the P2P module to
request the current preferred list of operating channels from the
driver.

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>

src/p2p/p2p.h

@@ -1073,6 +1073,20 @@ struct p2p_config {
 	 * P2PS_SETUP_* bitmap is used as the parameters and return value.
 	 */
 	u8 (*p2ps_group_capability)(void *ctx, u8 incoming, u8 role);
+
+	/**
+	 * get_pref_freq_list - Get preferred frequency list for an interface
+	 * @ctx: Callback context from cb_ctx
+	 * @go: Whether the use if for GO role
+	 * @len: Length of freq_list in entries (both IN and OUT)
+	 * @freq_list: Buffer for returning the preferred frequencies (MHz)
+	 * Returns: 0 on success, -1 on failure
+	 *
+	 * This function can be used to query the preferred frequency list from
+	 * the driver specific to a particular interface type.
+	 */
+	int (*get_pref_freq_list)(void *ctx, int go,
+				  unsigned int *len, unsigned int *freq_list);
 };
 
 

wpa_supplicant/p2p_supplicant.c

@@ -3949,6 +3949,17 @@ static int wpas_prov_disc_resp_cb(void *ctx)
 }
 
 
+static int wpas_p2p_get_pref_freq_list(void *ctx, int go,
+				       unsigned int *len,
+				       unsigned int *freq_list)
+{
+	struct wpa_supplicant *wpa_s = ctx;
+
+	return wpa_drv_get_pref_freq_list(wpa_s, go ? WPA_IF_P2P_GO :
+					  WPA_IF_P2P_CLIENT, len, freq_list);
+}
+
+
 /**
  * wpas_p2p_init - Initialize P2P module for %wpa_supplicant
  * @global: Pointer to global data from wpa_supplicant_init()
@@ -4002,6 +4013,7 @@ int wpas_p2p_init(struct wpa_global *global, struct wpa_supplicant *wpa_s)
 	p2p.p2ps_prov_complete = wpas_p2ps_prov_complete;
 	p2p.prov_disc_resp_cb = wpas_prov_disc_resp_cb;
 	p2p.p2ps_group_capability = p2ps_group_capability;
+	p2p.get_pref_freq_list = wpas_p2p_get_pref_freq_list;
 
 	os_memcpy(wpa_s->global->p2p_dev_addr, wpa_s->own_addr, ETH_ALEN);
 	os_memcpy(p2p.dev_addr, wpa_s->global->p2p_dev_addr, ETH_ALEN);