From 1713f4b9b4813e725ea7e27d89365b2b6ff21eb3 Mon Sep 17 00:00:00 2001
From: SeaEagle1 <seaeagle1@users.sourceforge.net>
Date: Thu, 22 Apr 2021 01:19:57 +0200
Subject: [PATCH] Add SO_REUSEPORT option for SSDP

fixes #541
---
 miniupnpd/Changelog.txt | 3 +++
 miniupnpd/minissdp.c    | 6 +++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/miniupnpd/Changelog.txt b/miniupnpd/Changelog.txt
index c604b45..8686a0b 100644
--- a/miniupnpd/Changelog.txt
+++ b/miniupnpd/Changelog.txt
@@ -1,5 +1,8 @@
 $Id: Changelog.txt,v 1.475 2021/05/11 21:57:18 nanard Exp $
 
+2021/04/22:
+  Add SO_REUSEPORT option for SSDP receive sockets
+
 2021/03/31:
   GetExternalIPAddress returns empty string when the External IP address can
     not be retrieved.
diff --git a/miniupnpd/minissdp.c b/miniupnpd/minissdp.c
index f96f75f..216a3d0 100644
--- a/miniupnpd/minissdp.c
+++ b/miniupnpd/minissdp.c
@@ -2,7 +2,7 @@
 /* vim: tabstop=4 shiftwidth=4 noexpandtab
  * MiniUPnP project
  * http://miniupnp.free.fr/ or https://miniupnp.tuxfamily.org/
- * (c) 2006-2020 Thomas Bernard
+ * (c) 2006-2021 Thomas Bernard
  * This software is subject to the conditions detailed
  * in the LICENCE file provided within the distribution */
 
@@ -197,6 +197,10 @@ OpenAndConfSSDPReceiveSocket(int ipv6)
 	{
 		syslog(LOG_WARNING, "setsockopt(udp, SO_REUSEADDR): %m");
 	}
+	if (setsockopt(s, SOL_SOCKET, SO_REUSEPORT, &on, sizeof(on)) < 0)
+	{
+		syslog(LOG_WARNING, "setsockopt(udp, SO_REUSEPORT): %m");
+	}
 #ifdef IP_RECVIF
 	/* BSD */
 	if(!ipv6) {