release/src/router/tinc/src/subnet.h

   1 /*
   2     subnet.h -- header for subnet.c
   3     Copyright (C) 2000-2012 Guus Sliepen <guus@tinc-vpn.org>,
   4                   2000-2005 Ivo Timmermans
   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 2 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 along
  17     with this program; if not, write to the Free Software Foundation, Inc.,
  18     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19 */
  20
  21 #ifndef __TINC_SUBNET_H__
  22 #define __TINC_SUBNET_H__
  23
  24 #include "net.h"
  25
  26 typedef enum subnet_type_t {
  27         SUBNET_MAC = 0,
  28         SUBNET_IPV4,
  29         SUBNET_IPV6,
  30         SUBNET_TYPES            /* Guardian */
  31 } subnet_type_t;
  32
  33 typedef struct subnet_mac_t {
  34         mac_t address;
  35 } subnet_mac_t;
  36
  37 typedef struct subnet_ipv4_t {
  38         ipv4_t address;
  39         int prefixlength;
  40 } subnet_ipv4_t;
  41
  42 typedef struct subnet_ipv6_t {
  43         ipv6_t address;
  44         int prefixlength;
  45 } subnet_ipv6_t;
  46
  47 #include "node.h"
  48
  49 typedef struct subnet_t {
  50         struct node_t *owner;   /* the owner of this subnet */
  51
  52         subnet_type_t type;     /* subnet type (IPv4? IPv6? MAC? something even weirder?) */
  53         time_t expires;         /* expiry time */
  54         int weight;             /* weight (higher value is higher priority) */
  55
  56         /* And now for the actual subnet: */
  57
  58         union net {
  59                 subnet_mac_t mac;
  60                 subnet_ipv4_t ipv4;
  61                 subnet_ipv6_t ipv6;
  62         } net;
  63 } subnet_t;
  64
  65 #define MAXNETSTR 64
  66
  67 extern splay_tree_t *subnet_tree;
  68
  69 extern int subnet_compare(const struct subnet_t *, const struct subnet_t *);
  70 extern subnet_t *new_subnet(void) __attribute__ ((__malloc__));
  71 extern void free_subnet(subnet_t *);
  72 extern void init_subnets(void);
  73 extern void exit_subnets(void);
  74 extern splay_tree_t *new_subnet_tree(void) __attribute__ ((__malloc__));
  75 extern void free_subnet_tree(splay_tree_t *);
  76 extern void subnet_add(struct node_t *, subnet_t *);
  77 extern void subnet_del(struct node_t *, subnet_t *);
  78 extern void subnet_update(struct node_t *, subnet_t *, bool);
  79 extern int maskcmp(const void *, const void *, int);
  80 extern void maskcpy(void *, const void *, int, int);
  81 extern void mask(void *, int, int);
  82 extern bool maskcheck(const void *, int, int);
  83 extern bool net2str(char *, int, const subnet_t *);
  84 extern bool str2net(subnet_t *, const char *);
  85 extern subnet_t *lookup_subnet(const struct node_t *, const subnet_t *);
  86 extern subnet_t *lookup_subnet_mac(const struct node_t *, const mac_t *);
  87 extern subnet_t *lookup_subnet_ipv4(const ipv4_t *);
  88 extern subnet_t *lookup_subnet_ipv6(const ipv6_t *);
  89 extern bool dump_subnets(struct connection_t *);
  90 extern void subnet_cache_flush(void);
  91
  92 #endif /* __TINC_SUBNET_H__ */