From ee041181721bdaef7fc71ab93cef1b6732d97388 Mon Sep 17 00:00:00 2001
From: Grant Limberg <grant.limberg@zerotier.com>
Date: Tue, 13 Oct 2020 08:24:26 -0700
Subject: [PATCH] null check

---
 one.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/one.cpp b/one.cpp
index 9d28b7c30..c8a9dddf4 100644
--- a/one.cpp
+++ b/one.cpp
@@ -1153,7 +1153,7 @@ static int cli(int argc,char **argv)
 					void *addr;
 					getifaddrs(&ifap);
 					for(ifa = ifap; ifa; ifa = ifa->ifa_next) {
-						if(strcmp(ifr.ifr_name, ifa->ifa_name) == 0) {
+						if(strcmp(ifr.ifr_name, ifa->ifa_name) == 0 && ifa->ifa_addr != NULL) {
 							if(ifa->ifa_addr->sa_family == AF_INET) {
 								struct sockaddr_in *ipv4 = (struct sockaddr_in*)ifa->ifa_addr;
 								addr = &ipv4->sin_addr;