racoon.tproj/policy.h

   1 /*      $KAME: policy.h,v 1.18 2001/10/02 04:10:17 sakane 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 #ifndef __POLICY_H__
  32 #define __POLICY_H__
  33
  34
  35 #include <sys/queue.h>
  36
  37 /* refs. ipsec.h */
  38 /*
  39  * Security Policy Index
  40  * NOTE: Ensure to be same address family and upper layer protocol.
  41  * NOTE: ul_proto, port number, uid, gid:
  42  *      ANY: reserved for waldcard.
  43  *      0 to (~0 - 1): is one of the number of each value.
  44  */
  45 struct policyindex {
  46         u_int8_t dir;                   /* direction of packet flow, see blow */
  47         struct sockaddr_storage src;    /* IP src address for SP */
  48         struct sockaddr_storage dst;    /* IP dst address for SP */
  49         u_int8_t prefs;                 /* prefix length in bits for src */
  50         u_int8_t prefd;                 /* prefix length in bits for dst */
  51         u_int16_t ul_proto;             /* upper layer Protocol */
  52 };
  53
  54 /* Security Policy Data Base */
  55 struct secpolicy {
  56         TAILQ_ENTRY(secpolicy) chain;
  57
  58         struct policyindex spidx;       /* selector */
  59         u_int32_t id;                   /* It's unique number on the system. */
  60
  61         u_int policy;           /* DISCARD, NONE or IPSEC, see keyv2.h */
  62         struct ipsecrequest *req;
  63                                 /* pointer to the ipsec request tree, */
  64                                 /* if policy == IPSEC else this value == NULL.*/
  65 };
  66
  67 /* Security Assocciation Index */
  68 /* NOTE: Ensure to be same address family */
  69 struct secasindex {
  70         struct sockaddr_storage src;    /* srouce address for SA */
  71         struct sockaddr_storage dst;    /* destination address for SA */
  72         u_int16_t proto;                /* IPPROTO_ESP or IPPROTO_AH */
  73         u_int8_t mode;                  /* mode of protocol, see ipsec.h */
  74         u_int32_t reqid;                /* reqid id who owned this SA */
  75                                         /* see IPSEC_MANUAL_REQID_MAX. */
  76 };
  77
  78 /* Request for IPsec */
  79 struct ipsecrequest {
  80         struct ipsecrequest *next;
  81                                 /* pointer to next structure */
  82                                 /* If NULL, it means the end of chain. */
  83
  84         struct secasindex saidx;/* hint for search proper SA */
  85                                 /* if __ss_len == 0 then no address specified.*/
  86         u_int level;            /* IPsec level defined below. */
  87
  88         struct secpolicy *sp;   /* back pointer to SP */
  89 };
  90
  91 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx)                        \
  92 do {                                                                         \
  93         bzero((idx), sizeof(struct policyindex));                            \
  94         (idx)->dir = (_dir);                                                 \
  95         (idx)->prefs = (ps);                                                 \
  96         (idx)->prefd = (pd);                                                 \
  97         (idx)->ul_proto = (ulp);                                             \
  98         memcpy(&(idx)->src, (s), ((struct sockaddr *)(s))->sa_len);          \
  99         memcpy(&(idx)->dst, (d), ((struct sockaddr *)(d))->sa_len);          \
 100 } while (0)
 101
 102 struct ph2handle;
 103 struct policyindex;
 104 extern struct secpolicy *getsp __P((struct policyindex *));
 105 extern struct secpolicy *getsp_r __P((struct policyindex *));
 106 struct secpolicy *getspbyspid __P((u_int32_t));
 107 extern int cmpspidxstrict __P((struct policyindex *, struct policyindex *));
 108 extern int cmpspidxwild __P((struct policyindex *, struct policyindex *));
 109 extern struct secpolicy *newsp __P((void));
 110 extern void delsp __P((struct secpolicy *));
 111 extern void delsp_bothdir __P((struct policyindex *));
 112 extern void inssp __P((struct secpolicy *));
 113 extern void remsp __P((struct secpolicy *));
 114 extern void flushsp __P((void));
 115 extern void initsp __P((void));
 116 extern struct ipsecrequest *newipsecreq __P((void));
 117
 118 extern const char *spidx2str __P((const struct policyindex *));
 119
 120
 121 #endif /* __POLICY_H__ */
 122