ipsec-tools/racoon/policy.h

   1 /* $Id: policy.h,v 1.5 2004/06/11 16:00:17 ludvigm Exp $ */
   2
   3 /*
   4  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. Neither the name of the project nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #ifndef _POLICY_H
  33 #define _POLICY_H
  34
  35 #include "racoon_types.h"
  36 #include <sys/queue.h>
  37
  38 /* refs. ipsec.h */
  39 /*
  40  * Security Policy Index
  41  * NOTE: Ensure to be same address family and upper layer protocol.
  42  * NOTE: ul_proto, port number, uid, gid:
  43  *      ANY: reserved for waldcard.
  44  *      0 to (~0 - 1): is one of the number of each value.
  45  */
  46 struct policyindex {
  47         u_int8_t dir;                   /* direction of packet flow, see blow */
  48         struct sockaddr_storage src;    /* IP src address for SP */
  49         struct sockaddr_storage dst;    /* IP dst address for SP */
  50         u_int8_t prefs;                 /* prefix length in bits for src */
  51         u_int8_t prefd;                 /* prefix length in bits for dst */
  52         u_int16_t ul_proto;             /* upper layer Protocol */
  53         u_int32_t priority;             /* priority for the policy */
  54 };
  55
  56 /* Security Policy Data Base */
  57 struct secpolicy {
  58         TAILQ_ENTRY(secpolicy) chain;
  59
  60         struct policyindex spidx;       /* selector */
  61         u_int32_t id;                   /* It's unique number on the system. */
  62
  63         u_int policy;           /* DISCARD, NONE or IPSEC, see keyv2.h */
  64         struct ipsecrequest *req;
  65                                 /* pointer to the ipsec request tree, */
  66                                 /* if policy == IPSEC else this value == NULL.*/
  67 };
  68
  69 /* Security Assocciation Index */
  70 /* NOTE: Ensure to be same address family */
  71 struct secasindex {
  72         struct sockaddr_storage src;    /* srouce address for SA */
  73         struct sockaddr_storage dst;    /* destination address for SA */
  74         u_int16_t proto;                /* IPPROTO_ESP or IPPROTO_AH */
  75         u_int8_t mode;                  /* mode of protocol, see ipsec.h */
  76         u_int32_t reqid;                /* reqid id who owned this SA */
  77                                         /* see IPSEC_MANUAL_REQID_MAX. */
  78 };
  79
  80 /* Request for IPsec */
  81 struct ipsecrequest {
  82         struct ipsecrequest *next;
  83                                 /* pointer to next structure */
  84                                 /* If NULL, it means the end of chain. */
  85
  86         struct secasindex saidx;/* hint for search proper SA */
  87                                 /* if __ss_len == 0 then no address specified.*/
  88         u_int level;            /* IPsec level defined below. */
  89
  90         struct secpolicy *sp;   /* back pointer to SP */
  91 };
  92
  93 #ifdef HAVE_PFKEY_POLICY_PRIORITY
  94 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, _priority, idx)              \
  95 do {                                                                         \
  96         bzero((idx), sizeof(struct policyindex));                            \
  97         (idx)->dir = (_dir);                                                 \
  98         (idx)->prefs = (ps);                                                 \
  99         (idx)->prefd = (pd);                                                 \
 100         (idx)->ul_proto = (ulp);                                             \
 101         (idx)->priority = (_priority);                                        \
 102         memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s)));          \
 103         memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d)));          \
 104 } while (0)
 105 #else
 106 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx)              \
 107 do {                                                                         \
 108         bzero((idx), sizeof(struct policyindex));                            \
 109         (idx)->dir = (_dir);                                                 \
 110         (idx)->prefs = (ps);                                                 \
 111         (idx)->prefd = (pd);                                                 \
 112         (idx)->ul_proto = (ulp);                                             \
 113         memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s)));          \
 114         memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d)));          \
 115 } while (0)
 116 #endif
 117
 118
 119 struct policyindex;
 120 extern struct secpolicy *getsp (struct policyindex *);
 121 extern struct secpolicy *getsp_r (struct policyindex *, phase2_handle_t *);
 122 struct secpolicy *getspbyspid (u_int32_t);
 123 extern int cmpspidxstrict (struct policyindex *, struct policyindex *);
 124 extern int cmpspidxwild (struct policyindex *, struct policyindex *);
 125 extern struct secpolicy *newsp (void);
 126 extern void delsp (struct secpolicy *);
 127 extern void delsp_bothdir (struct policyindex *);
 128 extern void inssp (struct secpolicy *);
 129 extern void remsp (struct secpolicy *);
 130 extern void flushsp (void);
 131 extern void initsp (void);
 132 extern struct ipsecrequest *newipsecreq (void);
 133 extern int policies_installed (void);
 134
 135 extern const char *spidx2str (const struct policyindex *);
 136
 137 #endif /* _POLICY_H */