Add the socket option IPV6_MULTICAST_LOOP to prevent the interface from autoconfiguring using RA messages sent by itself.

(cherry picked from commit 2ac913ade490dacde317d4e30f2bcb7a1b96c5ba)

backport-add-the-socket-option-IPV6_MULTICAST_LOOP.patch

@@ -0,0 +1,31 @@
+From bc8f31629d3d6eaaf273781d0b4c83e81bebe0eb Mon Sep 17 00:00:00 2001
+From: Wei Xing <skyxwwalker@gmail.com>
+Date: Mon, 18 Dec 2023 02:16:09 +0800
+Subject: [PATCH]  Add the socket option IPV6_MULTICAST_LOOP to prevent the
+ interface from autoconfiguring using RA messages sent by itself.
+
+Reference:https://github.com/radvd-project/radvd/commit/bc8f31629d3d6eaaf273781d0b4c83e81bebe0eb
+Conflict:NA
+
+---
+ socket.c | 7 +++++++
+ 1 file changed, 7 insertions(+)
+
+diff --git a/socket.c b/socket.c
+index 849ed744..547fe939 100644
+--- a/socket.c
++++ b/socket.c
+@@ -65,6 +65,13 @@ int open_icmpv6_socket(void)
+ 		flog(LOG_ERR, "setsockopt(IPV6_MULTICAST_HOPS): %s", strerror(errno));
+ 		return -1;
+ 	}
++
++        err = setsockopt(sock, IPPROTO_IPV6, IPV6_MULTICAST_LOOP, (int[]){0}, sizeof(int));
++        if (err < 0) {
++                flog(LOG_ERR, "setsockopt(IPV6_MULTICAST_LOOP): %s", strerror(errno));
++                return -1;
++        }
++
+ #ifdef IPV6_RECVHOPLIMIT
+ 	err = setsockopt(sock, IPPROTO_IPV6, IPV6_RECVHOPLIMIT, (int[]){1}, sizeof(int));
+ 	if (err < 0) {

radvd.spec

@@ -1,6 +1,6 @@
 Name:	     	radvd
 Version:	2.19
-Release:	2
+Release:	3
 Summary:  	Router ADVertisement Daemon for IPv6
 License:	BSD with advertising
 URL:		http://www.litech.org/radvd/
@@ -9,6 +9,7 @@ Source1:        radvd-tmpfs.conf
 Source2:        radvd.service
 
 Patch6000:	backport-add-IPV6_DROP_MEMBERSHIP-to-clean-up-resources-when-.patch	
+Patch6001:      backport-add-the-socket-option-IPV6_MULTICAST_LOOP.patch
 
 BuildRequires:	gcc bison flex flex-static pkgconfig check-devel systemd
 Requires(pre):	shadow-utils
@@ -90,6 +91,12 @@ exit 0
 %{_mandir}/*/*
 
 %changelog
+* Fri Oct 11 2024 lifeifei <lifeifei@kylinos.cn> - 2.19-3
+- Type:bugfix
+- Id:NA
+- SUG:NA
+- DESC:Add the socket option IPV6_MULTICAST_LOOP to prevent the interface from autoconfiguring using RA messages sent by itself.
+
 * Tue Jun 28 2022 Aichun Li <liaichun@huawei.com> - 2.19-2
 - Type:bugfix
 - Id:NA