From 5a221a8e151ba2644d6e09f11c247ab299246f9c Mon Sep 17 00:00:00 2001
From: Tudy GOURMELEN <tgourmelen@silicom.fr>
Date: Tue, 26 Jul 2022 12:39:57 +0200
Subject: [PATCH] fix: ignore interface with no link address

---
 src/linux.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/linux.rs b/src/linux.rs
index dc5a4b5..95f67d3 100644
--- a/src/linux.rs
+++ b/src/linux.rs
@@ -146,6 +146,13 @@ pub fn list_afinet_netifas() -> Result<Vec<(String, IpAddr)>, Error> {
         while !(**ifa).ifa_next.is_null() {
             let ifa_addr = (**ifa).ifa_addr;
 
+            // If a tun device is present, no link address is assigned to it and `ifa_addr` is null.
+            // See https://github.com/EstebanBorai/local-ip-address/issues/24
+            if ifa_addr.is_null() {
+                *ifa = (**ifa).ifa_next;
+                continue;
+            }
+
             match (*ifa_addr).sa_family as i32 {
                 // AF_INET IPv4 protocol implementation
                 AF_INET => {