networkd: VXLAN add support to configure IP Don't fragment.

Allow users to set the IPv4 DF bit in outgoing packets, or to inherit its
value from the IPv4 inner header. If the encapsulated protocol is IPv6 and
DF is configured to be inherited, always set it.

1 files changed, 16 insertions, 0 deletions

diff --git a/src/network/netdev/vxlan.h b/src/network/netdev/vxlan.h
index ad72a10b2f..d448e3ccfe 100644
--- a/src/network/netdev/vxlan.h
+++ b/src/network/netdev/vxlan.h
@@ -3,12 +3,22 @@
 
 typedef struct VxLan VxLan;
 
+#include <linux/if_link.h>
+
 #include "in-addr-util.h"
 #include "netdev/netdev.h"
 
 #define VXLAN_VID_MAX (1u << 24) - 1
 #define VXLAN_FLOW_LABEL_MAX_MASK 0xFFFFFU
 
+typedef enum VxLanDF {
+        NETDEV_VXLAN_DF_NO = VXLAN_DF_UNSET,
+        NETDEV_VXLAN_DF_YES = VXLAN_DF_SET,
+        NETDEV_VXLAN_DF_INHERIT = VXLAN_DF_INHERIT,
+        _NETDEV_VXLAN_DF_MAX,
+        _NETDEV_VXLAN_DF_INVALID = -1
+} VxLanDF;
+
 struct VxLan {
         NetDev meta;
 
@@ -18,6 +28,8 @@ struct VxLan {
         int local_family;
         int group_family;
 
+        VxLanDF df;
+
         union in_addr_union remote;
         union in_addr_union local;
         union in_addr_union group;
@@ -50,6 +62,10 @@ struct VxLan {
 DEFINE_NETDEV_CAST(VXLAN, VxLan);
 extern const NetDevVTable vxlan_vtable;
 
+const char *df_to_string(VxLanDF d) _const_;
+VxLanDF df_from_string(const char *d) _pure_;
+
 CONFIG_PARSER_PROTOTYPE(config_parse_vxlan_address);
 CONFIG_PARSER_PROTOTYPE(config_parse_port_range);
 CONFIG_PARSER_PROTOTYPE(config_parse_flow_label);
+CONFIG_PARSER_PROTOTYPE(config_parse_df);