1 /* $NetBSD: policy.h,v 1.5.4.2 2007/06/07 20:34:19 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 87 /* Security Assocciation Index */ 88 /* NOTE: Ensure to be same address family */ 89 struct secasindex { 90 struct sockaddr_storage src; /* srouce address for SA */ 91 struct sockaddr_storage dst; /* destination address for SA */ 92 u_int16_t proto; /* IPPROTO_ESP or IPPROTO_AH */ 93 u_int8_t mode; /* mode of protocol, see ipsec.h */ 94 u_int32_t reqid; /* reqid id who owned this SA */ 95 /* see IPSEC_MANUAL_REQID_MAX. */ 96 }; 97 98 /* Request for IPsec */ 99 struct ipsecrequest { 100 struct ipsecrequest *next; 101 /* pointer to next structure */ 102 /* If NULL, it means the end of chain. */ 103 104 struct secasindex saidx;/* hint for search proper SA */ 105 /* if __ss_len == 0 then no address specified.*/ 106 u_int level; /* IPsec level defined below. */ 107 108 struct secpolicy *sp; /* back pointer to SP */ 109 }; 110 111 #ifdef HAVE_PFKEY_POLICY_PRIORITY 112 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, _priority, _created, idx) \ 113 do { \ 114 memset((idx), 0, sizeof(struct policyindex)); \ 115 (idx)->dir = (_dir); \ 116 (idx)->prefs = (ps); \ 117 (idx)->prefd = (pd); \ 118 (idx)->ul_proto = (ulp); \ 119 (idx)->priority = (_priority); \ 120 (idx)->created = (_created); \ 121 memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s))); \ 122 memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d))); \ 123 } while (0) 124 #else 125 #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, _created, idx) \ 126 do { \ 127 memset((idx), 0, sizeof(struct policyindex)); \ 128 (idx)->dir = (_dir); \ 129 (idx)->prefs = (ps); \ 130 (idx)->prefd = (pd); \ 131 (idx)->ul_proto = (ulp); \ 132 (idx)->created = (_created); \ 133 memcpy(&(idx)->src, (s), sysdep_sa_len((struct sockaddr *)(s))); \ 134 memcpy(&(idx)->dst, (d), sysdep_sa_len((struct sockaddr *)(d))); \ 135 } while (0) 136 #endif 137 138 struct ph2handle; 139 struct policyindex; 140 extern struct secpolicy *getsp __P((struct policyindex *)); 141 extern struct secpolicy *getsp_r __P((struct policyindex *)); 142 struct secpolicy *getspbyspid __P((u_int32_t)); 143 extern int cmpspidxstrict __P((struct policyindex *, struct policyindex *)); 144 extern int cmpspidxwild __P((struct policyindex *, struct policyindex *)); 145 extern struct secpolicy *newsp __P((void)); 146 extern void delsp __P((struct secpolicy *)); 147 extern void delsp_bothdir __P((struct policyindex *)); 148 extern void inssp __P((struct secpolicy *)); 149 extern void remsp __P((struct secpolicy *)); 150 extern void flushsp __P((void)); 151 extern void initsp __P((void)); 152 extern struct ipsecrequest *newipsecreq __P((void)); 153 154 extern const char *spidx2str __P((const struct policyindex *)); 155 #ifdef HAVE_SECCTX 156 #include <selinux/selinux.h> 157 extern int get_security_context __P((vchar_t *, struct policyindex *)); 158 extern void init_avc __P((void)); 159 extern int within_range __P((security_context_t, security_context_t)); 160 extern void set_secctx_in_proposal __P((struct ph2handle *, struct policyindex)); 161 #endif 162 163 #endif /* _POLICY_H */ 164