/* $KAME: policy.h,v 1.18 2001/10/02 04:10:17 sakane Exp $ */ /* * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * 3. Neither the name of the project nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #ifndef __POLICY_H__ #define __POLICY_H__ #include /* refs. ipsec.h */ /* * Security Policy Index * NOTE: Ensure to be same address family and upper layer protocol. * NOTE: ul_proto, port number, uid, gid: * ANY: reserved for waldcard. * 0 to (~0 - 1): is one of the number of each value. */ struct policyindex { u_int8_t dir; /* direction of packet flow, see blow */ struct sockaddr_storage src; /* IP src address for SP */ struct sockaddr_storage dst; /* IP dst address for SP */ u_int8_t prefs; /* prefix length in bits for src */ u_int8_t prefd; /* prefix length in bits for dst */ u_int16_t ul_proto; /* upper layer Protocol */ }; /* Security Policy Data Base */ struct secpolicy { TAILQ_ENTRY(secpolicy) chain; struct policyindex spidx; /* selector */ u_int32_t id; /* It's unique number on the system. */ u_int policy; /* DISCARD, NONE or IPSEC, see keyv2.h */ struct ipsecrequest *req; /* pointer to the ipsec request tree, */ /* if policy == IPSEC else this value == NULL.*/ }; /* Security Assocciation Index */ /* NOTE: Ensure to be same address family */ struct secasindex { struct sockaddr_storage src; /* srouce address for SA */ struct sockaddr_storage dst; /* destination address for SA */ u_int16_t proto; /* IPPROTO_ESP or IPPROTO_AH */ u_int8_t mode; /* mode of protocol, see ipsec.h */ u_int32_t reqid; /* reqid id who owned this SA */ /* see IPSEC_MANUAL_REQID_MAX. */ }; /* Request for IPsec */ struct ipsecrequest { struct ipsecrequest *next; /* pointer to next structure */ /* If NULL, it means the end of chain. */ struct secasindex saidx;/* hint for search proper SA */ /* if __ss_len == 0 then no address specified.*/ u_int level; /* IPsec level defined below. */ struct secpolicy *sp; /* back pointer to SP */ }; #define KEY_SETSECSPIDX(_dir, s, d, ps, pd, ulp, idx) \ do { \ bzero((idx), sizeof(struct policyindex)); \ (idx)->dir = (_dir); \ (idx)->prefs = (ps); \ (idx)->prefd = (pd); \ (idx)->ul_proto = (ulp); \ memcpy(&(idx)->src, (s), ((struct sockaddr *)(s))->sa_len); \ memcpy(&(idx)->dst, (d), ((struct sockaddr *)(d))->sa_len); \ } while (0) struct ph2handle; struct policyindex; extern struct secpolicy *getsp __P((struct policyindex *)); extern struct secpolicy *getsp_r __P((struct policyindex *)); struct secpolicy *getspbyspid __P((u_int32_t)); extern int cmpspidxstrict __P((struct policyindex *, struct policyindex *)); extern int cmpspidxwild __P((struct policyindex *, struct policyindex *)); extern struct secpolicy *newsp __P((void)); extern void delsp __P((struct secpolicy *)); extern void delsp_bothdir __P((struct policyindex *)); extern void inssp __P((struct secpolicy *)); extern void remsp __P((struct secpolicy *)); extern void flushsp __P((void)); extern void initsp __P((void)); extern struct ipsecrequest *newipsecreq __P((void)); extern const char *spidx2str __P((const struct policyindex *)); #endif /* __POLICY_H__ */