From e4842ef7dfc993a1584059a625d7318eab7d5aad Mon Sep 17 00:00:00 2001
From: Peter Bieringer <pb@bieringer.de>
Date: Tue, 12 Mar 2024 18:33:59 +0100
Subject: [PATCH] be more relaxed on IPv4/IPv6 systems during server listen

---
 radicale/server.py | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/radicale/server.py b/radicale/server.py
index 62fe4ef3..70f65334 100644
--- a/radicale/server.py
+++ b/radicale/server.py
@@ -309,6 +309,10 @@ def serve(configuration: config.Configuration,
                             # macOS: IPv4 address for INET6 address family with
                             #        IPV6_V6ONLY set
                             e.errno == errno.EADDRNOTAVAIL or
+                            # Temporary failure in name resolution
+                            #  can happen if "hosts" is using eg. "localhost"
+                            #  and only resolvable to an IPv4 address
+                            e.errno == -3 or
                             # Address family not supported
                             e.errno == errno.EAFNOSUPPORT or
                             # Protocol not supported