crypto/dist/ipsec-tools/src/racoon/policy.h

   1 /*      $NetBSD: policy.h,v 1.7 2007/05/31 19:54:55 manu Exp $  */
   2
   3 /* Id: policy.h,v 1.5 2004/06/11 16:00:17 ludvigm Exp */
   4
   5 /*
   6  * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
   7  * All rights reserved.
   8  *
   9  * Redistribution and use in source and binary forms, with or without
  10  * modification, are permitted provided that the following conditions
  11  * are met:
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  * 3. Neither the name of the project nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #ifndef _POLICY_H
  35 #define _POLICY_H
  36
  37 #include <sys/queue.h>
  38
  39
  40 #ifdef HAVE_SECCTX
  41 #define MAX_CTXSTR_SIZE 50
  42 struct security_ctx {
  43         u_int8_t ctx_doi;       /* Security Context DOI */
  44         u_int8_t ctx_alg;       /* Security Context Algorithm */
  45         u_int16_t ctx_strlen;   /* Security Context stringlength
  46                                  * (includes terminating NULL)
  47                                  */
  48         char ctx_str[MAX_CTXSTR_SIZE];  /* Security Context string */
  49 };
  50 #endif
  51
  52 /* refs. ipsec.h */
  53 /*
  54  * Security Policy Index
  55  * NOTE: Ensure to be same address family and upper layer protocol.
  56  * NOTE: ul_proto, port number, uid, gid:
  57  *      ANY: reserved for waldcard.
  58  *      0 to (~0 - 1): is one of the number of each value.
  59  */
  60 struct policyindex {
  61         u_int8_t dir;                   /* direction of packet flow, see blow */
  62         struct sockaddr_storage src;    /* IP src address for SP */
  63         struct sockaddr_storage dst;    /* IP dst address for SP */
  64         u_int8_t prefs;                 /* prefix length in bits for src */
  65         u_int8_t prefd;                 /* prefix length in bits for dst */
  66         u_int16_t ul_proto;             /* upper layer Protocol */
  67         u_int32_t priority;             /* priority for the policy */
  68         u_int64_t created;              /* Used for generated SPD entries deletion */
  69 #ifdef HAVE_SECCTX
  70         struct security_ctx sec_ctx;    /* Security Context */
  71 #endif
  72 };
  73
  74 /* Security Policy Data Base */
  75 struct secpolicy {
  76         TAILQ_ENTRY(secpolicy) chain;
  77
  78         struct policyindex spidx;       /* selector */
  79         u_int32_t id;                   /* It's unique number on the system. */
  80
  81         u_int policy;           /* DISCARD, NONE or IPSEC, see keyv2.h */
  82         struct ipsecrequest *req;
  83                                 /* pointer to the ipsec request tree, */
  84                                 /* if policy == IPSEC else this value == NULL.*/
  85
  86         /* MIPv6 needs to perform negotiation of SA using different addresses
  87          * than the endpoints of the SA (CoA for the source). In that case,
  88          * MIGRATE msg provides that info (before movement occurs on the MN) */
  89         struct sockaddr *local;
  90         struct sockaddr *remote;
  91 };
  92
  93 /* Security Assocciation Index */
  94 /* NOTE: Ensure to be same address family */
  95 struct secasindex {
  96         struct sockaddr_storage src;    /* srouce address for SA */
  97         struct sockaddr_storage dst;    /* destination address for SA */
  98         u_int16_t proto;                /* IPPROTO_ESP or IPPROTO_AH */
  99         u_int8_t mode;                  /* mode of protocol, see ipsec.h */
 100         u_int32_t reqid;                /* reqid id who owned this SA */
 101                                         /* see IPSEC_MANUAL_REQID_MAX. */
 102 };
 103
 104 /* Request for IPsec */
 105 struct ipsecrequest {
 106         struct ipsecrequest *next;
 107                                 /* pointer to next structure */
 108                                 /* If NULL, it means the end of chain. */
 109
 110         struct secasindex saidx;/* hint for search proper SA */
 111                                 /* if __ss_len == 0 then no address specified.*/
 112         u_int level;            /* IPsec level defined below. */
 113
 114         struct secpolicy *sp;   /* back pointer to SP */
 115 };
 116
 117 #ifdef HAVE_PFKEY_POLICY_PRIORITY
 118 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, _priority, _created, idx)              \
 119 do {                                                                         \
 120         bzero((idx), sizeof(struct policyindex));                            \
 121         (idx)->dir = (_dir);                                                 \
 122         (idx)->prefs = (ps);                                                 \
 123         (idx)->prefd = (pd);                                                 \
 124         (idx)->ul_proto = (ulp);                                             \
 125         (idx)->priority = (_priority);                                        \
 126         (idx)->created = (_created);                                        \
 127         memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s)));          \
 128         memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d)));          \
 129 } while (0)
 130 #else
 131 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, _created, idx)              \
 132 do {                                                                         \
 133         bzero((idx), sizeof(struct policyindex));                            \
 134         (idx)->dir = (_dir);                                                 \
 135         (idx)->prefs = (ps);                                                 \
 136         (idx)->prefd = (pd);                                                 \
 137         (idx)->ul_proto = (ulp);                                             \
 138         (idx)->created = (_created);                                        \
 139         memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s)));          \
 140         memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d)));          \
 141 } while (0)
 142 #endif
 143
 144 struct ph2handle;
 145 struct policyindex;
 146 extern struct secpolicy *getsp __P((struct policyindex *));
 147 extern struct secpolicy *getsp_r __P((struct policyindex *));
 148 struct secpolicy *getspbyspid __P((u_int32_t));
 149 extern int cmpspidxstrict __P((struct policyindex *, struct policyindex *));
 150 extern int cmpspidxwild __P((struct policyindex *, struct policyindex *));
 151 extern struct secpolicy *newsp __P((void));
 152 extern void delsp __P((struct secpolicy *));
 153 extern void delsp_bothdir __P((struct policyindex *));
 154 extern void inssp __P((struct secpolicy *));
 155 extern void remsp __P((struct secpolicy *));
 156 extern void flushsp __P((void));
 157 extern void initsp __P((void));
 158 extern struct ipsecrequest *newipsecreq __P((void));
 159
 160 extern const char *spidx2str __P((const struct policyindex *));
 161 #ifdef HAVE_SECCTX
 162 #include <selinux/selinux.h>
 163 extern int get_security_context __P((vchar_t *, struct policyindex *));
 164 extern void init_avc __P((void));
 165 extern int within_range __P((security_context_t, security_context_t));
 166 extern void set_secctx_in_proposal __P((struct ph2handle *, struct policyindex));
 167 #endif
 168
 169 #endif /* _POLICY_H */