release/src/router/openvpn/pf.h

   1 /*
   2  *  OpenVPN -- An application to securely tunnel IP networks
   3  *             over a single TCP/UDP port, with support for SSL/TLS-based
   4  *             session authentication and key exchange,
   5  *             packet encryption, packet authentication, and
   6  *             packet compression.
   7  *
   8  *  Copyright (C) 2002-2009 OpenVPN Technologies, Inc. <sales@openvpn.net>
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License version 2
  12  *  as published by the Free Software Foundation.
  13  *
  14  *  This program is distributed in the hope that it will be useful,
  15  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  *  GNU General Public License for more details.
  18  *
  19  *  You should have received a copy of the GNU General Public License
  20  *  along with this program (see the file COPYING included with this
  21  *  distribution); if not, write to the Free Software Foundation, Inc.,
  22  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  */
  24
  25 /* packet filter functions */
  26
  27 #if defined(ENABLE_PF) && !defined(OPENVPN_PF_H)
  28 #define OPENVPN_PF_H
  29
  30 #include "list.h"
  31 #include "mroute.h"
  32
  33 #define PF_MAX_LINE_LEN 256
  34
  35 struct context;
  36
  37 struct ipv4_subnet {
  38   bool exclude;
  39   in_addr_t network;
  40   in_addr_t netmask;
  41 };
  42
  43 struct pf_subnet {
  44   struct pf_subnet *next;
  45   struct ipv4_subnet rule;
  46 };
  47
  48 struct pf_subnet_set {
  49   bool default_allow;
  50   struct pf_subnet *list;
  51 };
  52
  53 struct pf_cn {
  54   bool exclude;
  55   char *cn;
  56 };
  57
  58 struct pf_cn_elem {
  59   struct pf_cn_elem *next;
  60   struct pf_cn rule;
  61 };
  62
  63 struct pf_cn_set {
  64   bool default_allow;
  65   struct pf_cn_elem *list;
  66   struct hash *hash_table;
  67 };
  68
  69 struct pf_set {
  70   bool kill;
  71   struct pf_subnet_set sns;
  72   struct pf_cn_set cns;
  73 };
  74
  75 struct pf_context {
  76   bool enabled;
  77   struct pf_set *pfs;
  78 #ifdef PLUGIN_PF
  79   char *filename;
  80   time_t file_last_mod;
  81   unsigned int n_check_reload;
  82   struct event_timeout reload;
  83 #endif
  84 };
  85
  86 void pf_init_context (struct context *c);
  87
  88 void pf_destroy_context (struct pf_context *pfc);
  89
  90 #ifdef PLUGIN_PF
  91 void pf_check_reload (struct context *c);
  92 #endif
  93
  94 #ifdef MANAGEMENT_PF
  95 bool pf_load_from_buffer_list (struct context *c, const struct buffer_list *config);
  96 #endif
  97
  98 #ifdef ENABLE_DEBUG
  99 void pf_context_print (const struct pf_context *pfc, const char *prefix, const int lev);
 100 #endif
 101
 102 #endif