FST: Mark fst_ies buffer const

This buffer is owned by the FST module, so mark it const in the
set_ies() callback to make it clearer which component is responsible for
modifying and freeing this.

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

src/ap/hostapd.c

@@ -1385,7 +1385,7 @@ static void fst_hostapd_get_channel_info_cb(void *ctx,
 }
 
 
-static void fst_hostapd_set_ies_cb(void *ctx, struct wpabuf *fst_ies)
+static void fst_hostapd_set_ies_cb(void *ctx, const struct wpabuf *fst_ies)
 {
 	struct hostapd_data *hapd = ctx;
 

src/ap/hostapd.h

@@ -312,7 +312,7 @@ struct hostapd_iface {
 	unsigned int cac_started:1;
 #ifdef CONFIG_FST
 	struct fst_iface *fst;
-	struct wpabuf *fst_ies;
+	const struct wpabuf *fst_ies;
 #endif /* CONFIG_FST */
 
 	/*

src/fst/fst.h

@@ -70,9 +70,9 @@ struct fst_wpa_obj {
 	/**
 	 * set_ies - Set interface's MB IE
 	 * @ctx: User context %ctx
-	 * @fst_ies: MB IE buffer
+	 * @fst_ies: MB IE buffer (owned by FST module)
 	 */
-	void (*set_ies)(void *ctx, struct wpabuf *fst_ies);
+	void (*set_ies)(void *ctx, const struct wpabuf *fst_ies);
 
 	/**
 	 * send_action - Send FST Action frame via the interface

src/fst/fst_iface.h

@@ -85,7 +85,7 @@ static inline int fst_iface_get_hw_modes(struct fst_iface *i,
 }
 
 static inline void fst_iface_set_ies(struct fst_iface *i,
-				     struct wpabuf *fst_ies)
+				     const struct wpabuf *fst_ies)
 {
 	i->iface_obj.set_ies(i->iface_obj.ctx, fst_ies);
 }

wpa_supplicant/wpa_supplicant.c

@@ -3751,7 +3751,7 @@ static int wpas_fst_get_hw_modes(void *ctx, struct hostapd_hw_modes **modes)
 }
 
 
-static void wpas_fst_set_ies_cb(void *ctx, struct wpabuf *fst_ies)
+static void wpas_fst_set_ies_cb(void *ctx, const struct wpabuf *fst_ies)
 {
 	struct wpa_supplicant *wpa_s = ctx;
 

wpa_supplicant/wpa_supplicant_i.h

@@ -980,7 +980,7 @@ struct wpa_supplicant {
 
 #ifdef CONFIG_FST
 	struct fst_iface *fst;
-	struct wpabuf *fst_ies;
+	const struct wpabuf *fst_ies;
 	struct wpabuf *received_mb_ies;
 #endif /* CONFIG_FST */
 };