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 <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         u_int32_t priority;             /* priority for the policy */
  53 };
  54
  55 /* Security Policy Data Base */
  56 struct secpolicy {
  57         TAILQ_ENTRY(secpolicy) chain;
  58
  59         struct policyindex spidx;       /* selector */
  60         u_int32_t id;                   /* It's unique number on the system. */
  61
  62         u_int policy;           /* DISCARD, NONE or IPSEC, see keyv2.h */
  63         struct ipsecrequest *req;
  64                                 /* pointer to the ipsec request tree, */
  65                                 /* if policy == IPSEC else this value == NULL.*/
  66 };
  67
  68 /* Security Assocciation Index */
  69 /* NOTE: Ensure to be same address family */
  70 struct secasindex {
  71         struct sockaddr_storage src;    /* srouce address for SA */
  72         struct sockaddr_storage dst;    /* destination address for SA */
  73         u_int16_t proto;                /* IPPROTO_ESP or IPPROTO_AH */
  74         u_int8_t mode;                  /* mode of protocol, see ipsec.h */
  75         u_int32_t reqid;                /* reqid id who owned this SA */
  76                                         /* see IPSEC_MANUAL_REQID_MAX. */
  77 };
  78
  79 /* Request for IPsec */
  80 struct ipsecrequest {
  81         struct ipsecrequest *next;
  82                                 /* pointer to next structure */
  83                                 /* If NULL, it means the end of chain. */
  84
  85         struct secasindex saidx;/* hint for search proper SA */
  86                                 /* if __ss_len == 0 then no address specified.*/
  87         u_int level;            /* IPsec level defined below. */
  88
  89         struct secpolicy *sp;   /* back pointer to SP */
  90 };
  91
  92 #ifdef HAVE_PFKEY_POLICY_PRIORITY
  93 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, _priority, idx)              \
  94 do {                                                                         \
  95         bzero((idx), sizeof(struct policyindex));                            \
  96         (idx)->dir = (_dir);                                                 \
  97         (idx)->prefs = (ps);                                                 \
  98         (idx)->prefd = (pd);                                                 \
  99         (idx)->ul_proto = (ulp);                                             \
 100         (idx)->priority = (_priority);                                        \
 101         memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s)));          \
 102         memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d)));          \
 103 } while (0)
 104 #else
 105 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx)              \
 106 do {                                                                         \
 107         bzero((idx), sizeof(struct policyindex));                            \
 108         (idx)->dir = (_dir);                                                 \
 109         (idx)->prefs = (ps);                                                 \
 110         (idx)->prefd = (pd);                                                 \
 111         (idx)->ul_proto = (ulp);                                             \
 112         memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s)));          \
 113         memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d)));          \
 114 } while (0)
 115 #endif
 116
 117 struct ph2handle;
 118 struct policyindex;
 119 extern struct secpolicy *getsp __P((struct policyindex *));
 120 extern struct secpolicy *getsp_r __P((struct policyindex *, struct ph2handle *));
 121 struct secpolicy *getspbyspid __P((u_int32_t));
 122 extern int cmpspidxstrict __P((struct policyindex *, struct policyindex *));
 123 extern int cmpspidxwild __P((struct policyindex *, struct policyindex *));
 124 extern struct secpolicy *newsp __P((void));
 125 extern void delsp __P((struct secpolicy *));
 126 extern void delsp_bothdir __P((struct policyindex *));
 127 extern void inssp __P((struct secpolicy *));
 128 extern void remsp __P((struct secpolicy *));
 129 extern void flushsp __P((void));
 130 extern void initsp __P((void));
 131 extern struct ipsecrequest *newipsecreq __P((void));
 132 extern int policies_installed __P((void));
 133
 134 extern const char *spidx2str __P((const struct policyindex *));
 135
 136 #endif /* _POLICY_H */