network: fix ipv6 tunnel encapsulation limit (#19087)

The encapsulation limit of IPv6 tunnel can not be set to 4, which is the default value of the encapsulation limit.

diff --git a/src/network/netdev/tunnel.c b/src/network/netdev/tunnel.c
index 2fab269397f5ab121ef6fd7b2b425a9da63cb50a..23718081b90bc5c513fae83c6afd44061ec3243a 100644 (file)
--- a/src/network/netdev/tunnel.c
+++ b/src/network/netdev/tunnel.c
@@ -389,7 +389,7 @@ static int netdev_ip6tnl_fill_message_create(NetDev *netdev, Link *link, sd_netl
         if (t->allow_localremote >= 0)
                 SET_FLAG(t->flags, IP6_TNL_F_ALLOW_LOCAL_REMOTE, t->allow_localremote);
 
-        if (t->encap_limit != IPV6_DEFAULT_TNL_ENCAP_LIMIT) {
+        if (t->encap_limit != 0) {
                 r = sd_netlink_message_append_u8(m, IFLA_IPTUN_ENCAP_LIMIT, t->encap_limit);
                 if (r < 0)
                         return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_ENCAP_LIMIT attribute: %m");