Allow SCS supported to be disabled for testing purposes

"SET disable_scs_support 1" can be used to disable indication of SCS
support in the Extended Capabilities element for testing purposes.

Signed-off-by: Vinita S. Maloo <vmaloo@codeaurora.org>

wpa_supplicant/ctrl_iface.c

@@ -830,6 +830,8 @@ static int wpa_supplicant_ctrl_iface_set(struct wpa_supplicant *wpa_s,
 			wpa_s->sae_commit_override = wpabuf_parse_bin(value);
 	} else if (os_strcasecmp(cmd, "driver_signal_override") == 0) {
 		ret = wpas_ctrl_iface_set_dso(wpa_s, value);
+	} else if (os_strcasecmp(cmd, "disable_scs_support") == 0) {
+		wpa_s->disable_scs_support = !!atoi(value);
 #ifdef CONFIG_DPP
 	} else if (os_strcasecmp(cmd, "dpp_config_obj_override") == 0) {
 		os_free(wpa_s->dpp_config_obj_override);
@@ -8551,6 +8553,7 @@ static void wpa_supplicant_ctrl_iface_flush(struct wpa_supplicant *wpa_s)
 	wpabuf_free(wpa_s->rsnxe_override_eapol);
 	wpa_s->rsnxe_override_eapol = NULL;
 	wpas_clear_driver_signal_override(wpa_s);
+	wpa_s->disable_scs_support = 0;
 	wpa_s->oci_freq_override_eapol = 0;
 	wpa_s->oci_freq_override_saquery_req = 0;
 	wpa_s->oci_freq_override_saquery_resp = 0;

wpa_supplicant/wpa_supplicant.c

@@ -1874,6 +1874,8 @@ int wpa_supplicant_set_suites(struct wpa_supplicant *wpa_s,
 
 static void wpas_ext_capab_byte(struct wpa_supplicant *wpa_s, u8 *pos, int idx)
 {
+	bool scs = true;
+
 	*pos = 0x00;
 
 	switch (idx) {
@@ -1917,7 +1919,12 @@ static void wpas_ext_capab_byte(struct wpa_supplicant *wpa_s, u8 *pos, int idx)
 #endif /* CONFIG_MBO */
 		break;
 	case 6: /* Bits 48-55 */
-		*pos |= 0x40; /* Bit 54 - SCS */
+#ifdef CONFIG_TESTING_OPTIONS
+		if (wpa_s->disable_scs_support)
+			scs = false;
+#endif /* CONFIG_TESTING_OPTIONS */
+		if (scs)
+			*pos |= 0x40; /* Bit 54 - SCS */
 		break;
 	case 7: /* Bits 56-63 */
 		break;

wpa_supplicant/wpa_supplicant_i.h

@@ -1478,6 +1478,9 @@ struct wpa_supplicant {
 #endif /* CONFIG_PASN */
 	struct scs_robust_av_data scs_robust_av_req;
 	u8 scs_dialog_token;
+#ifdef CONFIG_TESTING_OPTIONS
+	unsigned int disable_scs_support:1;
+#endif /* CONFIG_TESTING_OPTIONS */
 };