dco: create DCO interface using SITNL

Signed-off-by: Antonio Quartulli <a@unstable.cc>
Acked-by: Arne Schwabe <arne@rfc2549.org>
Message-Id: <20220624083809.23487-5-a@unstable.cc>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg24514.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>

diff --git a/src/openvpn/networking_sitnl.c b/src/openvpn/networking_sitnl.c
index bffcb067b7937b41d06552ae5e78d3336b8e166b..0944ad0a9e858f898d94339cdc1a92646bbc0476 100644 (file)
--- a/src/openvpn/networking_sitnl.c
+++ b/src/openvpn/networking_sitnl.c
@@ -28,6 +28,7 @@
 
 #include "syshead.h"
 
+#include "dco.h"
 #include "errlevel.h"
 #include "buffer.h"
 #include "misc.h"
@@ -1344,6 +1345,16 @@ net_iface_new(openvpn_net_ctx_t *ctx, const char *iface, const char *type,
 
     struct rtattr *linkinfo = SITNL_NEST(&req.n, sizeof(req), IFLA_LINKINFO);
     SITNL_ADDATTR(&req.n, sizeof(req), IFLA_INFO_KIND, type, strlen(type) + 1);
+#if defined(ENABLE_DCO)
+    if (arg && (strcmp(type, "ovpn-dco") == 0))
+    {
+        dco_context_t *dco = arg;
+        struct rtattr *data = SITNL_NEST(&req.n, sizeof(req), IFLA_INFO_DATA);
+        SITNL_ADDATTR(&req.n, sizeof(req), IFLA_OVPN_MODE, &dco->ifmode,
+                      sizeof(uint8_t));
+        SITNL_NEST_END(&req.n, data);
+    }
+#endif
     SITNL_NEST_END(&req.n, linkinfo);
 
     req.i.ifi_family = AF_PACKET;