[PATCH] AP: Allow using existing interfaces as a fallback

[Rafał Miłecki]

Some drivers (e.g. brcmfmac) may not support deleting virtual
interfaces. In such cases we can start AP interfaces once only. On next
tries be should try to use existing interfaces as a fallback.

Signed-off-by: Rafał Miłecki <zajec5 at gmail.com>
---
 src/ap/hostapd.c | 18 +++++++++++++-----
 1 file changed, 13 insertions(+), 5 deletions(-)

diff --git a/src/ap/hostapd.c b/src/ap/hostapd.c
index 42c1aaa..4e0de0c 100644
--- a/src/ap/hostapd.c
+++ b/src/ap/hostapd.c
@@ -936,16 +936,24 @@ static int hostapd_setup_bss(struct hostapd_data *hapd, int first)
 			} while (mac_in_conf(hapd->iconf, hapd->own_addr));
 		}
 
-		hapd->interface_added = 1;
 		if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
 				   conf->iface, addr, hapd,
 				   &hapd->drv_priv, force_ifname, if_addr,
 				   conf->bridge[0] ? conf->bridge : NULL,
 				   first == -1)) {
-			wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
-				   MACSTR ")", MAC2STR(hapd->own_addr));
-			hapd->interface_added = 0;
-			return -1;
+			/* Try to use existing interface */
+			if (hostapd_if_add(hapd->iface->bss[0], WPA_IF_AP_BSS,
+					   conf->iface, hapd->own_addr, hapd,
+					   &hapd->drv_priv, force_ifname,
+					   if_addr,
+					   conf->bridge[0] ? conf->bridge : NULL,
+					   1)) {
+				wpa_printf(MSG_ERROR, "Failed to add BSS (BSSID="
+					   MACSTR ")", MAC2STR(hapd->own_addr));
+				return -1;
+			}
+		} else {
+			hapd->interface_added = 1;
 		}
 
 		if (!addr)
-- 
1.8.4.5