From 871d6648f502df396d6156542d61e53cdb0d1e25 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Rapha=C3=ABl=20M=C3=A9lotte?= <raphael.melotte@mind.be>
Date: Wed, 2 Dec 2020 17:51:45 +0100
Subject: [PATCH] hostapd: Add multi_ap settings to get_config() output
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Since a running hostapd is not necessarily using the settings that are
in the configuration file (if they were changed at runtime, or the file
was changed but not reloaded, etc.), being able to get their value at
runtime can be useful (to know if they have to be updated for example).

If multi_ap is set, also print the SSID and passphrase (or PSK).

Signed-off-by: Raphaël Mélotte <raphael.melotte@mind.be>
---
 hostapd/ctrl_iface.c | 46 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 46 insertions(+)

diff --git a/hostapd/ctrl_iface.c b/hostapd/ctrl_iface.c
index 381809d72..55084a919 100644
--- a/hostapd/ctrl_iface.c
+++ b/hostapd/ctrl_iface.c
@@ -1223,6 +1223,52 @@ static int hostapd_ctrl_iface_get_config(struct hostapd_data *hapd,
 			return pos - buf;
 		pos += ret;
 	}
+
+	if (hapd->conf->multi_ap) {
+		struct hostapd_ssid *ssid = &hapd->conf->multi_ap_backhaul_ssid;
+
+		ret = os_snprintf(pos, end - pos, "multi_ap=%d\n",
+				  hapd->conf->multi_ap);
+		if (os_snprintf_error(end - pos, ret))
+			return pos - buf;
+		pos += ret;
+
+		if (ssid->ssid) {
+			ret = os_snprintf(pos, end - pos,
+					  "multi_ap_backhaul_ssid=%s\n",
+					  wpa_ssid_txt(ssid->ssid,
+						       ssid->ssid_len));
+			if (os_snprintf_error(end - pos, ret))
+				return pos - buf;
+			pos += ret;
+		}
+
+		if (hapd->conf->wps_state && hapd->conf->wpa &&
+			ssid->wpa_passphrase) {
+			ret = os_snprintf(pos, end - pos,
+					  "multi_ap_backhaul_wpa_passphrase=%s\n",
+					  ssid->wpa_passphrase);
+			if (os_snprintf_error(end - pos, ret))
+				return pos - buf;
+			pos += ret;
+		}
+
+		if (hapd->conf->wps_state && hapd->conf->wpa &&
+		    ssid->wpa_psk &&
+		    ssid->wpa_psk->group) {
+			char hex[PMK_LEN * 2 + 1];
+
+			wpa_snprintf_hex(hex, sizeof(hex), ssid->wpa_psk->psk,
+					 PMK_LEN);
+			ret = os_snprintf(pos, end - pos,
+					  "multi_ap_backhaul_wpa_psk=%s\n",
+					  hex);
+			forced_memzero(hex, sizeof(hex));
+			if (os_snprintf_error(end - pos, ret))
+				return pos - buf;
+			pos += ret;
+		}
+	}
 #endif /* CONFIG_WPS */
 
 	if (hapd->conf->wpa) {