Add Extended Capability element to AssocReq for Interworking

If Interworking is enabled, add Extended Capability element to
(Re)Association Request frames to indicate support for Interworking.

wpa_supplicant/sme.c

@@ -237,6 +237,24 @@ void sme_authenticate(struct wpa_supplicant *wpa_s,
 	}
 #endif /* CONFIG_P2P */
 
+#ifdef CONFIG_INTERWORKING
+	if (wpa_s->conf->interworking) {
+		u8 *pos = wpa_s->sme.assoc_req_ie;
+		if (wpa_s->sme.assoc_req_ie_len > 0 && pos[0] == WLAN_EID_RSN)
+			pos += 2 + pos[1];
+		os_memmove(pos + 6, pos,
+			   wpa_s->sme.assoc_req_ie_len -
+			   (pos - wpa_s->sme.assoc_req_ie));
+		wpa_s->sme.assoc_req_ie_len += 6;
+		*pos++ = WLAN_EID_EXT_CAPAB;
+		*pos++ = 4;
+		*pos++ = 0x00;
+		*pos++ = 0x00;
+		*pos++ = 0x00;
+		*pos++ = 0x80; /* Bit 31 - Interworking */
+	}
+#endif /* CONFIG_INTERWORKING */
+
 	wpa_supplicant_cancel_sched_scan(wpa_s);
 	wpa_supplicant_cancel_scan(wpa_s);
 

wpa_supplicant/wpa_supplicant.c

@@ -1289,6 +1289,22 @@ void wpa_supplicant_associate(struct wpa_supplicant *wpa_s,
 	}
 #endif /* CONFIG_P2P */
 
+#ifdef CONFIG_INTERWORKING
+	if (wpa_s->conf->interworking) {
+		u8 *pos = wpa_ie;
+		if (wpa_ie_len > 0 && pos[0] == WLAN_EID_RSN)
+			pos += 2 + pos[1];
+		os_memmove(pos + 6, pos, wpa_ie_len - (pos - wpa_ie));
+		wpa_ie_len += 6;
+		*pos++ = WLAN_EID_EXT_CAPAB;
+		*pos++ = 4;
+		*pos++ = 0x00;
+		*pos++ = 0x00;
+		*pos++ = 0x00;
+		*pos++ = 0x80; /* Bit 31 - Interworking */
+	}
+#endif /* CONFIG_INTERWORKING */
+
 	wpa_clear_keys(wpa_s, bss ? bss->bssid : NULL);
 	use_crypt = 1;
 	cipher_pairwise = cipher_suite2driver(wpa_s->pairwise_cipher);