Mark AP disabled if initialization steps fail

Previously, some of the last initialization steps could fail without
clearly marking the interface disabled. For example, configuring the
channel to the driver could fail, but hostapd would not clearly identify
as the interface not being in functional state apart from not moving it
to the ENABLED state. Send an AP-DISABLED event and mark interface state
DISABLED if such a setup operation fails.

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

src/ap/hostapd.c

@@ -1093,7 +1093,7 @@ static int setup_interface2(struct hostapd_iface *iface)
 		if (ret < 0) {
 			wpa_printf(MSG_ERROR, "Could not select hw_mode and "
 				   "channel. (%d)", ret);
-			return -1;
+			goto fail;
 		}
 		if (ret == 1) {
 			wpa_printf(MSG_DEBUG, "Interface initialization will be completed in a callback (ACS)");
@@ -1101,7 +1101,7 @@ static int setup_interface2(struct hostapd_iface *iface)
 		}
 		ret = hostapd_check_ht_capab(iface);
 		if (ret < 0)
-			return -1;
+			goto fail;
 		if (ret == 1) {
 			wpa_printf(MSG_DEBUG, "Interface initialization will "
 				   "be completed in a callback");
@@ -1112,6 +1112,13 @@ static int setup_interface2(struct hostapd_iface *iface)
 			wpa_printf(MSG_DEBUG, "DFS support is enabled");
 	}
 	return hostapd_setup_interface_complete(iface, 0);
+
+fail:
+	hostapd_set_state(iface, HAPD_IFACE_DISABLED);
+	wpa_msg(iface->bss[0]->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
+	if (iface->interfaces && iface->interfaces->terminate_on_error)
+		eloop_terminate();
+	return -1;
 }
 
 
@@ -1129,13 +1136,8 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 	size_t j;
 	u8 *prev_addr;
 
-	if (err) {
-		wpa_printf(MSG_ERROR, "Interface initialization failed");
-		hostapd_set_state(iface, HAPD_IFACE_DISABLED);
-		if (iface->interfaces && iface->interfaces->terminate_on_error)
-			eloop_terminate();
-		return -1;
-	}
+	if (err)
+		goto fail;
 
 	wpa_printf(MSG_DEBUG, "Completing interface initialization");
 	if (iface->conf->channel) {
@@ -1152,8 +1154,11 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 #ifdef NEED_AP_MLME
 		/* Check DFS */
 		res = hostapd_handle_dfs(iface);
-		if (res <= 0)
+		if (res <= 0) {
+			if (res < 0)
+				goto fail;
 			return res;
+		}
 #endif /* NEED_AP_MLME */
 
 		if (hostapd_set_freq(hapd, hapd->iconf->hw_mode, iface->freq,
@@ -1166,7 +1171,7 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 				     hapd->iconf->vht_oper_centr_freq_seg1_idx)) {
 			wpa_printf(MSG_ERROR, "Could not set channel for "
 				   "kernel driver");
-			return -1;
+			goto fail;
 		}
 	}
 
@@ -1177,7 +1182,7 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 			hostapd_logger(hapd, NULL, HOSTAPD_MODULE_IEEE80211,
 				       HOSTAPD_LEVEL_WARNING,
 				       "Failed to prepare rates table.");
-			return -1;
+			goto fail;
 		}
 	}
 
@@ -1185,14 +1190,14 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 	    hostapd_set_rts(hapd, hapd->iconf->rts_threshold)) {
 		wpa_printf(MSG_ERROR, "Could not set RTS threshold for "
 			   "kernel driver");
-		return -1;
+		goto fail;
 	}
 
 	if (hapd->iconf->fragm_threshold > -1 &&
 	    hostapd_set_frag(hapd, hapd->iconf->fragm_threshold)) {
 		wpa_printf(MSG_ERROR, "Could not set fragmentation threshold "
 			   "for kernel driver");
-		return -1;
+		goto fail;
 	}
 
 	prev_addr = hapd->own_addr;
@@ -1202,7 +1207,7 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 		if (j)
 			os_memcpy(hapd->own_addr, prev_addr, ETH_ALEN);
 		if (hostapd_setup_bss(hapd, j == 0))
-			return -1;
+			goto fail;
 		if (hostapd_mac_comp_empty(hapd->conf->bssid) == 0)
 			prev_addr = hapd->own_addr;
 	}
@@ -1217,7 +1222,7 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 	if (hostapd_driver_commit(hapd) < 0) {
 		wpa_printf(MSG_ERROR, "%s: Failed to commit driver "
 			   "configuration", __func__);
-		return -1;
+		goto fail;
 	}
 
 	/*
@@ -1228,7 +1233,7 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 	 */
 	for (j = 0; j < iface->num_bss; j++) {
 		if (hostapd_init_wps_complete(iface->bss[j]))
-			return -1;
+			goto fail;
 	}
 
 	hostapd_set_state(iface, HAPD_IFACE_ENABLED);
@@ -1242,6 +1247,14 @@ int hostapd_setup_interface_complete(struct hostapd_iface *iface, int err)
 		iface->interfaces->terminate_on_error--;
 
 	return 0;
+
+fail:
+	wpa_printf(MSG_ERROR, "Interface initialization failed");
+	hostapd_set_state(iface, HAPD_IFACE_DISABLED);
+	wpa_msg(hapd->msg_ctx, MSG_INFO, AP_EVENT_DISABLED);
+	if (iface->interfaces && iface->interfaces->terminate_on_error)
+		eloop_terminate();
+	return -1;
 }