kernel-utun: create a tun device when installing virtual IPs

diff --git a/src/libhydra/plugins/kernel_utun/kernel_utun_net.c b/src/libhydra/plugins/kernel_utun/kernel_utun_net.c
index 7d854a7ba8fdabf51b0aa2b219703fa06a45400d..e27f7afa71c9766c375e484258f6405ce39b657b 100644 (file)
--- a/src/libhydra/plugins/kernel_utun/kernel_utun_net.c
+++ b/src/libhydra/plugins/kernel_utun/kernel_utun_net.c
@@ -21,6 +21,7 @@
 
 #include <hydra.h>
 #include <utils/debug.h>
+#include <networking/tun_device.h>
 
 typedef struct private_kernel_utun_net_t private_kernel_utun_net_t;
 
@@ -33,6 +34,11 @@ struct private_kernel_utun_net_t {
         * Public part of the kernel_utun_net_t object.
         */
        kernel_utun_net_t public;
+
+       /**
+        * Active utun interface
+        */
+       tun_device_t *tun;
 };
 
 METHOD(kernel_net_t, create_address_enumerator, enumerator_t*,
@@ -93,7 +99,36 @@ METHOD(kernel_net_t, add_ip, status_t,
        private_kernel_utun_net_t *this, host_t *virtual_ip, int prefix,
        char *iface_name)
 {
-       return FAILED;
+       if (this->tun)
+       {       /* only one for now */
+               return FAILED;
+       }
+       if (prefix == -1)
+       {
+               switch (virtual_ip->get_family(virtual_ip))
+               {
+                       case AF_INET:
+                               prefix = 32;
+                               break;
+                       case AF_INET6:
+                               prefix = 128;
+                               break;
+                       default:
+                               return NOT_SUPPORTED;
+               }
+       }
+       this->tun = tun_device_create(NULL);
+       if (!this->tun)
+       {
+               return FAILED;
+       }
+       if (!this->tun->set_address(this->tun, virtual_ip, prefix))
+       {
+               this->tun->destroy(this->tun);
+               this->tun = NULL;
+               return FAILED;
+       }
+       return SUCCESS;
 }
 
 METHOD(kernel_net_t, del_ip, status_t,
@@ -120,6 +155,10 @@ METHOD(kernel_net_t, del_route, status_t,
 METHOD(kernel_net_t, destroy, void,
        private_kernel_utun_net_t *this)
 {
+       if (this->tun)
+       {
+               this->tun->destroy(this->tun);
+       }
        free(this);
 }