networkd: add back path of MTU discovery for SIT

[elogind.git] / src / network / networkd-netdev-tunnel.c

diff --git a/src/network/networkd-netdev-tunnel.c b/src/network/networkd-netdev-tunnel.c
index 174fe234fd40406afce30e69322c3f96a8e73ae2..75876960b4fcf6890c3bbd22017bca0b0b4862d9 100644 (file)
--- a/src/network/networkd-netdev-tunnel.c
+++ b/src/network/networkd-netdev-tunnel.c
@@ -120,6 +120,14 @@ static int netdev_sit_fill_message_create(NetDev *netdev, Link *link, sd_rtnl_me
                 return r;
         }
 
+        r = sd_rtnl_message_append_u8(m, IFLA_IPTUN_PMTUDISC, t->pmtudisc);
+        if (r < 0) {
+                log_error_netdev(netdev,
+                                 "Could not append IFLA_IPTUN_PMTUDISC attribute: %s",
+                                 strerror(-r));
+                return r;
+        }
+
         return r;
 }