networkd: introduce ipip tunnel

This patch enables basic ipip tunnel support.
It works with kernel module ipip

example conf:

file: ipip.netdev

[NetDev]
Name=ipip-tun
Kind=ipip
MTUBytes=1480

[Tunnel]
Local=192.168.223.238
Remote=192.169.224.239
TTL=64

file: ipip.network

[Match]
Name=em1

[Network]
Tunnel=ipip-tun

[tomegun:
         - drop unused variable
         - take ref when enslaving]

1 files changed, 16 insertions, 0 deletions

diff --git a/src/network/networkd-manager.c b/src/network/networkd-manager.c
index 8bdc60f19c..cfa3a9900a 100644
--- a/src/network/networkd-manager.c
+++ b/src/network/networkd-manager.c
@@ -21,6 +21,7 @@
 
 #include <resolv.h>
 #include <linux/if.h>
+#include <libkmod.h>
 
 #include "path-util.h"
 #include "networkd.h"
@@ -551,3 +552,18 @@ finish:
 
         return r;
 }
+
+int manager_init_kmod_ctx(Manager *m) {
+        struct kmod_ctx *ctx;
+
+        assert(m);
+
+        ctx = kmod_new(NULL, NULL);
+        if (!ctx) {
+                return -ENOMEM;
+        }
+
+        m->kmod_ctx = ctx;
+
+        return 0;
+}