/* $NetBSD: policy.h,v 1.5.4.2 2007/06/07 20:34:19 manu Exp $ */
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/* Id: policy.h,v 1.5 2004/06/11 16:00:17 ludvigm Exp */
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/*
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* Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the project nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#ifndef _POLICY_H
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#define _POLICY_H
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#include <sys/queue.h>
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#ifdef HAVE_SECCTX
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#define MAX_CTXSTR_SIZE 50
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struct security_ctx {
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u_int8_t ctx_doi; /* Security Context DOI */
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u_int8_t ctx_alg; /* Security Context Algorithm */
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u_int16_t ctx_strlen; /* Security Context stringlength
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* (includes terminating NULL)
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*/
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char ctx_str[MAX_CTXSTR_SIZE]; /* Security Context string */
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};
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#endif
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/* refs. ipsec.h */
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/*
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* Security Policy Index
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* NOTE: Ensure to be same address family and upper layer protocol.
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* NOTE: ul_proto, port number, uid, gid:
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* ANY: reserved for waldcard.
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* 0 to (~0 - 1): is one of the number of each value.
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*/
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struct policyindex {
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u_int8_t dir; /* direction of packet flow, see blow */
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struct sockaddr_storage src; /* IP src address for SP */
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struct sockaddr_storage dst; /* IP dst address for SP */
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u_int8_t prefs; /* prefix length in bits for src */
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u_int8_t prefd; /* prefix length in bits for dst */
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u_int16_t ul_proto; /* upper layer Protocol */
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u_int32_t priority; /* priority for the policy */
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u_int64_t created; /* Used for generated SPD entries deletion */
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#ifdef HAVE_SECCTX
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struct security_ctx sec_ctx; /* Security Context */
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#endif
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};
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/* Security Policy Data Base */
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struct secpolicy {
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TAILQ_ENTRY(secpolicy) chain;
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struct policyindex spidx; /* selector */
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u_int32_t id; /* It's unique number on the system. */
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u_int policy; /* DISCARD, NONE or IPSEC, see keyv2.h */
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struct ipsecrequest *req;
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/* pointer to the ipsec request tree, */
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/* if policy == IPSEC else this value == NULL.*/
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};
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/* Security Assocciation Index */
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/* NOTE: Ensure to be same address family */
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struct secasindex {
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struct sockaddr_storage src; /* srouce address for SA */
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struct sockaddr_storage dst; /* destination address for SA */
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u_int16_t proto; /* IPPROTO_ESP or IPPROTO_AH */
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u_int8_t mode; /* mode of protocol, see ipsec.h */
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u_int32_t reqid; /* reqid id who owned this SA */
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/* see IPSEC_MANUAL_REQID_MAX. */
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};
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/* Request for IPsec */
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struct ipsecrequest {
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struct ipsecrequest *next;
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/* pointer to next structure */
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/* If NULL, it means the end of chain. */
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struct secasindex saidx;/* hint for search proper SA */
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/* if __ss_len == 0 then no address specified.*/
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u_int level; /* IPsec level defined below. */
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struct secpolicy *sp; /* back pointer to SP */
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};
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#ifdef HAVE_PFKEY_POLICY_PRIORITY
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#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, _priority, _created, idx) \
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do { \
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memset((idx), 0, sizeof(struct policyindex)); \
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(idx)->dir = (_dir); \
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(idx)->prefs = (ps); \
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(idx)->prefd = (pd); \
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(idx)->ul_proto = (ulp); \
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(idx)->priority = (_priority); \
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(idx)->created = (_created); \
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memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s))); \
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memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d))); \
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} while (0)
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#else
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#define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, _created, idx) \
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do { \
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memset((idx), 0, sizeof(struct policyindex)); \
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(idx)->dir = (_dir); \
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(idx)->prefs = (ps); \
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(idx)->prefd = (pd); \
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(idx)->ul_proto = (ulp); \
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(idx)->created = (_created); \
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memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s))); \
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memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d))); \
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} while (0)
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#endif
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struct ph2handle;
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struct policyindex;
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extern struct secpolicy *getsp __P((struct policyindex *));
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extern struct secpolicy *getsp_r __P((struct policyindex *));
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struct secpolicy *getspbyspid __P((u_int32_t));
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extern int cmpspidxstrict __P((struct policyindex *, struct policyindex *));
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extern int cmpspidxwild __P((struct policyindex *, struct policyindex *));
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extern struct secpolicy *newsp __P((void));
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extern void delsp __P((struct secpolicy *));
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extern void delsp_bothdir __P((struct policyindex *));
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extern void inssp __P((struct secpolicy *));
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extern void remsp __P((struct secpolicy *));
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extern void flushsp __P((void));
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extern void initsp __P((void));
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extern struct ipsecrequest *newipsecreq __P((void));
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extern const char *spidx2str __P((const struct policyindex *));
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#ifdef HAVE_SECCTX
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#include <selinux/selinux.h>
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extern int get_security_context __P((vchar_t *, struct policyindex *));
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extern void init_avc __P((void));
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extern int within_range __P((security_context_t, security_context_t));
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extern void set_secctx_in_proposal __P((struct ph2handle *, struct policyindex));
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#endif
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#endif /* _POLICY_H */
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