From 7fcdae34e17d58e48fdff0ff244a5964cd9fdf9d Mon Sep 17 00:00:00 2001
From: Martin <martin@urbackup.org>
Date: Mon, 13 Jul 2020 19:15:54 +0200
Subject: [PATCH] Skip interfaces where address is not set

(cherry picked from commit 41e5c28030e894769dc3a51ddc76d2d6f1bd4d75)
---
 urbackupcommon/fileclient/FileClient.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/urbackupcommon/fileclient/FileClient.cpp b/urbackupcommon/fileclient/FileClient.cpp
index 4e583e1d..40e08a59 100644
--- a/urbackupcommon/fileclient/FileClient.cpp
+++ b/urbackupcommon/fileclient/FileClient.cpp
@@ -152,7 +152,8 @@ void FileClient::bindToNewInterfaces()
 				!(ifap->ifa_flags & IFF_LOOPBACK)
 				&& !(ifap->ifa_flags & IFF_POINTOPOINT))
 			{
-				if (ifap->ifa_addr->sa_family == AF_INET
+				if (ifap->ifa_addr!=NULL
+					&& ifap->ifa_addr->sa_family == AF_INET
 					&& (ifap->ifa_flags & IFF_BROADCAST))
 				{
 					sockaddr_in source_addr;
@@ -222,7 +223,8 @@ void FileClient::bindToNewInterfaces()
 
 					Server->Log("Broadcasting on ipv4 interface "+std::string(ifap->ifa_name) + " addr " + ipToString(new_udpsock));
 				}
-				else if (ifap->ifa_addr->sa_family == AF_INET6
+				else if (ifap->ifa_addr != NULL 
+					&& ifap->ifa_addr->sa_family == AF_INET6
 					&& Server->getServerParameter("disable_ipv6").empty())
 				{
 					sockaddr_in6 source_addr;