tunnel.c

   1 /*
   2  * netifd - network interface daemon
   3  * Copyright (C) 2012 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14 #include "netifd.h"
  15 #include "device.h"
  16 #include "config.h"
  17 #include "system.h"
  18
  19 struct tunnel {
  20         struct device dev;
  21         device_state_cb set_state;
  22 };
  23
  24 static int
  25 tunnel_set_state(struct device *dev, bool up)
  26 {
  27         struct tunnel *tun = container_of(dev, struct tunnel, dev);
  28         int ret;
  29
  30         if (up) {
  31                 ret = system_add_ip_tunnel(dev->ifname, dev->config);
  32                 if (ret != 0)
  33                         return ret;
  34         }
  35
  36         ret = tun->set_state(dev, up);
  37         if (ret || !up)
  38                 system_del_ip_tunnel(dev->ifname);
  39
  40         return ret;
  41 }
  42
  43 static struct device *
  44 tunnel_create(const char *name, struct blob_attr *attr)
  45 {
  46         struct tunnel *tun;
  47         struct device *dev;
  48
  49         tun = calloc(1, sizeof(*tun));
  50         dev = &tun->dev;
  51         device_init(dev, &tunnel_device_type, name);
  52         tun->set_state = dev->set_state;
  53         dev->set_state = tunnel_set_state;
  54         device_set_present(dev, true);
  55
  56         return dev;
  57 }
  58
  59 static void
  60 tunnel_free(struct device *dev)
  61 {
  62         struct tunnel *tun = container_of(dev, struct tunnel, dev);
  63
  64         free(tun);
  65 }
  66
  67 const struct device_type tunnel_device_type = {
  68         .name = "IP tunnel",
  69         .config_params = &tunnel_attr_list,
  70
  71         .create = tunnel_create,
  72         .free = tunnel_free,
  73 };
  74
  75