More sysctls to set for IPv6

pkg/danmep/danmep.go

@@ -25,6 +25,8 @@ type sysctlData struct {
 var sysctls = map[string][]sysctlData {
   "enable_ipv6_on_iface": {
     {"net.ipv6.conf.%s.disable_ipv6", "0"},
+    {"net.ipv6.conf.%s.autoconf", "0"},
+    {"net.ipv6.conf.%s.accept_ra", "0"},
   },
   "disable_ipv6_on_iface": {
     {"net.ipv6.conf.%s.disable_ipv6", "1"},
@@ -139,8 +141,16 @@ func SetDanmEpSysctls(ep danmtypes.DanmEp) error {
     podNs.Close()
     origNs.Set()
   }()
-  // set sysctls for IPv6 (since IPv6 is enabled on all interfaces, let's disable on those where it is not needed)
-  if ep.Spec.Iface.AddressIPv6 == "" {
+  // set sysctls on those interfaces where IPv6 is needed
+  if ep.Spec.Iface.AddressIPv6 != "" {
+    for _, s := range sysctls["enable_ipv6_on_iface"] {
+      sstr := fmt.Sprintf(s.sysctlName, ep.Spec.Iface.Name)
+      _, err = sysctl.Sysctl(sstr, s.sysctlValue)
+      if err != nil {
+        return errors.New("failed to set sysctl due to:" + err.Error())
+      }
+    }
+  } else { // let's disable IPv6 on those interfaces where it is not needed
     for _, s := range sysctls["disable_ipv6_on_iface"] {
       sstr := fmt.Sprintf(s.sysctlName, ep.Spec.Iface.Name)
       _, err = sysctl.Sysctl(sstr, s.sysctlValue)