Show supported group_mgmt capabilities

This extends GET_CAPABILITY command to allow the supported group
management frame cipher suites to be listed.

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

wpa_supplicant/ctrl_iface.c

@@ -3333,6 +3333,13 @@ static const struct cipher_info ciphers[] = {
 	{ WPA_DRIVER_CAPA_ENC_WEP40, "WEP40", 1 }
 };
 
+static const struct cipher_info ciphers_group_mgmt[] = {
+	{ WPA_DRIVER_CAPA_ENC_BIP, "AES-128-CMAC", 1 },
+	{ WPA_DRIVER_CAPA_ENC_BIP_GMAC_128, "BIP-GMAC-128", 1 },
+	{ WPA_DRIVER_CAPA_ENC_BIP_GMAC_256, "BIP-GMAC-256", 1 },
+	{ WPA_DRIVER_CAPA_ENC_BIP_CMAC_256, "BIP-CMAC-256", 1 },
+};
+
 
 static int ctrl_iface_get_capability_pairwise(int res, char *strict,
 					      struct wpa_driver_capa *capa,
@@ -3406,6 +3413,35 @@ static int ctrl_iface_get_capability_group(int res, char *strict,
 }
 
 
+static int ctrl_iface_get_capability_group_mgmt(int res, char *strict,
+						struct wpa_driver_capa *capa,
+						char *buf, size_t buflen)
+{
+	int ret;
+	char *pos, *end;
+	unsigned int i;
+
+	pos = buf;
+	end = pos + buflen;
+
+	if (res < 0)
+		return 0;
+
+	for (i = 0; i < ARRAY_SIZE(ciphers_group_mgmt); i++) {
+		if (capa->enc & ciphers_group_mgmt[i].capa) {
+			ret = os_snprintf(pos, end - pos, "%s%s",
+					  pos == buf ? "" : " ",
+					  ciphers_group_mgmt[i].name);
+			if (os_snprintf_error(end - pos, ret))
+				return pos - buf;
+			pos += ret;
+		}
+	}
+
+	return pos - buf;
+}
+
+
 static int ctrl_iface_get_capability_key_mgmt(int res, char *strict,
 					      struct wpa_driver_capa *capa,
 					      char *buf, size_t buflen)
@@ -3755,6 +3791,10 @@ static int wpa_supplicant_ctrl_iface_get_capability(
 		return ctrl_iface_get_capability_group(res, strict, &capa,
 						       buf, buflen);
 
+	if (os_strcmp(field, "group_mgmt") == 0)
+		return ctrl_iface_get_capability_group_mgmt(res, strict, &capa,
+							    buf, buflen);
+
 	if (os_strcmp(field, "key_mgmt") == 0)
 		return ctrl_iface_get_capability_key_mgmt(res, strict, &capa,
 							  buf, buflen);