From 320e5baed0ed834b26a9348dc569d58fff44d48e Mon Sep 17 00:00:00 2001
From: Christian Giese <christian@rtbrick.com>
Date: Thu, 25 Feb 2021 21:21:36 +0100
Subject: [PATCH] Fix crash if control command is executed for Blaster intances
 without network interfaces.

---
 src/bbl_ctrl.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/bbl_ctrl.c b/src/bbl_ctrl.c
index 07bd15bb..018a3fc2 100644
--- a/src/bbl_ctrl.c
+++ b/src/bbl_ctrl.c
@@ -990,7 +990,9 @@ bbl_ctrl_socket_job (timer_s *timer) {
                                 }
                             } else {
                                 /* Use first interface as default. */
-                                key.ifindex = ctx->op.access_if[0]->addr.sll_ifindex;
+                                if(ctx->op.access_if[0]) {
+                                    key.ifindex = ctx->op.access_if[0]->addr.sll_ifindex;
+                                }
                             }
                             value = json_object_get(arguments, "outer-vlan");
                             if (value) {