src/libnetwork/interface.c

   1 /*#############################################################################
   2 #                                                                             #
   3 # IPFire.org - A linux based firewall                                         #
   4 # Copyright (C) 2018 IPFire Network Development Team                          #
   5 #                                                                             #
   6 # This program is free software: you can redistribute it and/or modify        #
   7 # it under the terms of the GNU General Public License as published by        #
   8 # the Free Software Foundation, either version 3 of the License, or           #
   9 # (at your option) any later version.                                         #
  10 #                                                                             #
  11 # This program is distributed in the hope that it will be useful,             #
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of              #
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               #
  14 # GNU General Public License for more details.                                #
  15 #                                                                             #
  16 # You should have received a copy of the GNU General Public License           #
  17 # along with this program.  If not, see <http://www.gnu.org/licenses/>.       #
  18 #                                                                             #
  19 #############################################################################*/
  20
  21 #include <errno.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25 #include <network/interface.h>
  26 #include <network/libnetwork.h>
  27 #include <network/logging.h>
  28 #include "libnetwork-private.h"
  29
  30 struct network_interface {
  31         struct network_ctx* ctx;
  32         int refcount;
  33
  34         char* name;
  35 };
  36
  37 NETWORK_EXPORT int network_interface_new(struct network_ctx* ctx,
  38                 struct network_interface** intf, const char* name) {
  39         if (!name)
  40                 return -EINVAL;
  41
  42         struct network_interface* i = calloc(1, sizeof(*i));
  43         if (!i)
  44                 return -ENOMEM;
  45
  46         // Initialise object
  47         i->ctx = network_ref(ctx);
  48         i->refcount = 1;
  49         i->name = strdup(name);
  50
  51         DEBUG(i->ctx, "Allocated network interface at %p\n", i);
  52
  53         *intf = i;
  54         return 0;
  55 }
  56
  57 NETWORK_EXPORT struct network_interface* network_interface_ref(struct network_interface* intf) {
  58         if (!intf)
  59                 return NULL;
  60
  61         intf->refcount++;
  62         return intf;
  63 }
  64
  65 static void network_interface_free(struct network_interface* intf) {
  66         DEBUG(intf->ctx, "Released network interface at %p\n", intf);
  67
  68         if (intf->name)
  69                 free(intf->name);
  70
  71         network_unref(intf->ctx);
  72         free(intf);
  73 }
  74
  75 NETWORK_EXPORT struct network_interface* network_interface_unref(struct network_interface* intf) {
  76         if (!intf)
  77                 return NULL;
  78
  79         if (--intf->refcount > 0)
  80                 return intf;
  81
  82         network_interface_free(intf);
  83         return NULL;
  84 }
  85
  86 NETWORK_EXPORT const char* network_interface_get_name(struct network_interface* intf) {
  87         return intf->name;
  88 }