@@ -56,6 +56,8 @@ extern "C" {
#define WPA_EVENT_BSS_ADDED "CTRL-EVENT-BSS-ADDED "
/** A BSS entry was removed (followed by BSS entry id and BSSID) */
#define WPA_EVENT_BSS_REMOVED "CTRL-EVENT-BSS-REMOVED "
+/** Notify the Userspace about the freq conflict */
+#define WPA_EVENT_FREQ_CONFLICT "CTRL-EVENT-FREQ-CONFLICT "
/** WPS overlap detected in PBC mode */
#define WPS_EVENT_OVERLAP "WPS-OVERLAP-DETECTED "
@@ -258,6 +258,9 @@ static void wpas_p2p_group_delete(struct
wpa_supplicant *wpa_s)
case P2P_GROUP_REMOVAL_GO_ENDING_SESSION:
reason = " reason=GO_ENDING_SESSION";
break;
+ case P2P_GROUP_REMOVAL_FREQ_CONFLICT:
+ reason = " reason=FREQ_CONFLICT";
+ break;
default:
reason = "";
break;
@@ -4609,3 +4612,43 @@ void wpas_p2p_notify_ap_sta_authorized(struct
wpa_supplicant *wpa_s,
return;
wpas_p2p_add_persistent_group_client(wpa_s, addr);
}
+
+int wpas_p2p_handle_frequency_conflicts(struct wpa_supplicant *wpa_s, int freq)
+{
+ struct wpa_supplicant *iface = NULL;
+
+ for (iface = wpa_s->global->ifaces; iface; iface = iface->next) {
+ if((iface->p2p_group_interface) && (iface->current_ssid) &&
+ (iface->current_ssid->frequency != freq)) {
+
+ if (iface->p2p_group_interface ==
P2P_GROUP_INTERFACE_GO) {
+ /* Try to see whether we can
move the GO. If it
+ * is not possible, remove the
GO interface
+ */
+
if(wpa_drv_switch_channel(iface, freq) == 0) {
+
wpa_printf(MSG_ERROR, "P2P: GO Moved to freq(%d)", freq);
+
iface->current_ssid->frequency = freq;
+ continue;
+ }
+ }
+
+ /* If GO cannot be moved or if the conflicting
interface is a
+ * P2P Client, remove the interface depending
up on the connection
+ * priority */
+ if(!wpas_is_p2p_prioritized(wpa_s)) {
+ /* STA connection has priority over existing
+ * P2P connection. So remove the interface */
+ wpa_printf(MSG_DEBUG, "P2P: Removing
P2P connection due to Single channel"
+ "concurrent mode
frequency conflict");
+ iface->removal_reason =
P2P_GROUP_REMOVAL_FREQ_CONFLICT;
+ wpas_p2p_group_delete(iface);
+ } else {
+ /* Existing connection has the
priority. Disable the newly
+ * selected network and let the
application know about it.
+ */
+ return -1;
+ }
+ }
+ }
+ return 0;
+}
@@ -25,6 +25,8 @@ void wpas_p2p_remain_on_channel_cb(struct
wpa_supplicant *wpa_s,
unsigned int freq, unsigned int duration);
void wpas_p2p_cancel_remain_on_channel_cb(struct wpa_supplicant *wpa_s,
unsigned int freq);
+int wpas_p2p_handle_frequency_conflicts(struct wpa_supplicant *wpa_s,
+ int freq);
int wpas_p2p_group_remove(struct wpa_supplicant *wpa_s, const char *ifname);
int wpas_p2p_group_add(struct wpa_supplicant *wpa_s, int persistent_group,
int freq);
@@ -1100,6 +1100,7 @@ void wpa_supplicant_associate(struct
wpa_supplicant *wpa_s,
ibss_rsn_deinit(wpa_s->ibss_rsn);
wpa_s->ibss_rsn = NULL;
#endif /* CONFIG_IBSS_RSN */
+ int freq = 0;
if (ssid->mode == WPAS_MODE_AP || ssid->mode == WPAS_MODE_P2P_GO ||
ssid->mode == WPAS_MODE_P2P_GROUP_FORMATION) {
@@ -1404,6 +1405,27 @@ void wpa_supplicant_associate(struct
wpa_supplicant *wpa_s,
wpa_supplicant_apply_ht_overrides(wpa_s, ssid, ¶ms);
#endif /* CONFIG_HT_OVERRIDES */
+ /* If multichannel concurrency is not supported, check for any frequency
+ * conflict and take appropriate action.
+ */
+ if (!(wpa_s->drv_flags & WPA_DRIVER_FLAGS_MULTI_CHANNEL_CONCURRENT) &&
+ ((freq = wpa_drv_shared_freq(wpa_s)) > 0) && (freq !=
params.freq)) {
+ wpa_printf(MSG_DEBUG, "Shared interface with
conflicting frequency
found (%d != %d)",
+ freq, params.freq);
+#ifdef CONFIG_P2P
+ if (wpas_p2p_handle_frequency_conflicts(wpa_s,
params.freq) < 0) {
+ /* Handling conflicts failed. Disable the
current connect req and
+ * notify the userspace to take appropriate action */
+ wpa_printf(MSG_DEBUG, "proiritize is not set.
Notifying user space
to handle the case");
+ wpa_supplicant_disable_network(wpa_s, ssid);
+ wpa_msg(wpa_s, MSG_INFO, WPA_EVENT_FREQ_CONFLICT
+ " id=%d", ssid->id);
+ os_memset(wpa_s->pending_bssid, 0, ETH_ALEN);
+ return;
+ }
+#endif /* CONFIG_P2P */
+ }
+
ret = wpa_drv_associate(wpa_s, ¶ms);
if (ret < 0) {
wpa_msg(wpa_s, MSG_INFO, "Association request to the driver "
b/wpa_supplicant/wpa_supplicant_i.h
@@ -504,7 +504,8 @@ struct wpa_supplicant {
P2P_GROUP_REMOVAL_REQUESTED,
P2P_GROUP_REMOVAL_IDLE_TIMEOUT,
P2P_GROUP_REMOVAL_UNAVAILABLE,
- P2P_GROUP_REMOVAL_GO_ENDING_SESSION
+ P2P_GROUP_REMOVAL_GO_ENDING_SESSION,
+ P2P_GROUP_REMOVAL_FREQ_CONFLICT
} removal_reason;
unsigned int p2p_cb_on_scan_complete:1;