ipsec-tools/racoon/nattraversal.h

   1 /*
   2  * Copyright (C) 2004 SuSE Linux AG, Nuernberg, Germany.
   3  * Contributed by: Michal Ludvig <mludvig@suse.cz>, SUSE Labs
   4  * All rights reserved.
   5  *
   6  * Redistribution and use in source and binary forms, with or without
   7  * modification, are permitted provided that the following conditions
   8  * are met:
   9  * 1. Redistributions of source code must retain the above copyright
  10  *    notice, this list of conditions and the following disclaimer.
  11  * 2. Redistributions in binary form must reproduce the above copyright
  12  *    notice, this list of conditions and the following disclaimer in the
  13  *    documentation and/or other materials provided with the distribution.
  14  * 3. Neither the name of the project nor the names of its contributors
  15  *    may be used to endorse or promote products derived from this software
  16  *    without specific prior written permission.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  21  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  28  * SUCH DAMAGE.
  29  */
  30
  31 #ifndef _NATTRAVERSAL_H
  32 #define _NATTRAVERSAL_H
  33
  34 #include "vendorid.h"
  35
  36 #ifdef __APPLE__
  37 #define UDP_ENCAP_ESPINUDP      2       /* to make it compile - we don't use this */
  38 #endif
  39
  40 #define NAT_ANNOUNCED           (1L<<0)
  41 #define NAT_DETECTED_ME         (1L<<1)
  42 #define NAT_DETECTED_PEER       (1L<<2)
  43 #define NAT_PORTS_CHANGED       (1L<<3)
  44 #define NAT_KA_QUEUED           (1L<<4)
  45 #define NAT_ADD_NON_ESP_MARKER  (1L<<5)
  46
  47 #define NATT_AVAILABLE(ph1)     ((iph1)->natt_flags & NAT_ANNOUNCED)
  48
  49 #define NAT_DETECTED    (NAT_DETECTED_ME | NAT_DETECTED_PEER)
  50
  51 #define NON_ESP_MARKER_LEN      sizeof(u_int32_t)
  52 #define NON_ESP_MARKER_USE(iph1)        ((iph1)->natt_flags & NAT_ADD_NON_ESP_MARKER)
  53
  54 /* These are the values from parsing "remote {}"
  55    block of the config file. */
  56 #define NATT_OFF        FALSE   /* = 0 */
  57 #define NATT_ON         TRUE    /* = 1 */
  58 #define NATT_FORCE      2
  59
  60 struct ph1natt_options {
  61   int           version;
  62   u_int16_t     float_port;
  63   u_int16_t     mode_udp_tunnel;
  64   u_int16_t     mode_udp_transport;
  65   u_int16_t     encaps_type; /* ESPINUDP / ESPINUDP_NON_IKE */
  66   u_int16_t     mode_udp_diff;
  67   u_int16_t     payload_nat_d;
  68   u_int16_t     payload_nat_oa;
  69 };
  70
  71 struct ph2natt {
  72   u_int8_t      type;
  73   u_int16_t     sport;
  74   u_int16_t     dport;
  75   struct sockaddr       *oa;
  76   u_int16_t     frag;
  77 };
  78
  79 int natt_vendorid (int vid);
  80 vchar_t *natt_hash_addr (struct ph1handle *iph1, struct sockaddr *addr);
  81 int natt_compare_addr_hash (struct ph1handle *iph1, vchar_t *natd_received, int natd_seq);
  82 int natt_udp_encap (int encmode);
  83 int natt_fill_options (struct ph1natt_options *opts, int version);
  84 void natt_float_ports (struct ph1handle *iph1);
  85 void natt_handle_vendorid (struct ph1handle *iph1, int vid_numeric);
  86 #ifdef NOT_NOW
  87 int create_natoa_payloads(struct ph2handle *iph2, vchar_t **, vchar_t **);
  88 #endif
  89
  90 struct payload_list *
  91 isakmp_plist_append_natt_vids (struct payload_list *plist, vchar_t *vid_natt[MAX_NATT_VID_COUNT]);
  92
  93 #ifndef __APPLE__
  94 /* NAT keepalive functions */
  95 void natt_keepalive_init (void);
  96 int natt_keepalive_add (struct sockaddr *src, struct sockaddr *dst);
  97 int natt_keepalive_add_ph1 (struct ph1handle *iph1);
  98 void natt_keepalive_remove (struct sockaddr *src, struct sockaddr *dst);
  99 #endif
 100
 101 /* Walk through all rmconfigs and tell if NAT-T is enabled in at least one. */
 102 int natt_enabled_in_rmconf (void);
 103
 104 #endif /* _NATTRAVERSAL_H */