/* $NetBSD: ipsec.h,v 1.6 1999/11/19 10:41:43 bouyer 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. */ /* * IPsec controller part. */ #ifndef _NETINET6_IPSEC_H_ #define _NETINET6_IPSEC_H_ #if (defined(__FreeBSD__) && __FreeBSD__ >= 3) || defined(__NetBSD__) #if defined(_KERNEL) && !defined(_LKM) #include "opt_inet.h" #endif #endif #include #include #ifdef KERNEL /* Security Policy Data Base */ struct secpolicy { struct secpolicy *next; struct secpolicy *prev; struct keytree *spt; /* back pointer to the top of SPD */ struct secindex idx; /* index */ int refcnt; /* reference count */ u_int state; /* 0: dead, others: alive */ #define IPSEC_SPSTATE_DEAD 0 #define IPSEC_SPSTATE_ALIVE 1 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.*/ }; /* Request for IPsec */ struct ipsecrequest { struct ipsecrequest *next; /* pointer to next structure */ /* If 0, it means end of chain. */ u_int proto; /* IPPROTO_ESP or IPPROTO_AH */ u_int mode; /* mode for security protocol, see below. */ u_int level; /* IPsec level defined below. */ struct sockaddr *proxy; /* Destination address in Outer IP header. */ /* If mode == TRANSPORT, it must be set NULL. */ struct secas *sa; /* place holder for the security association */ struct secpolicy *sp; /* back pointer to SP */ }; #endif /*KERNEL*/ #define IPSEC_MODE_TRANSPORT 0 #define IPSEC_MODE_TUNNEL 1 /* Policy level */ /* * IPSEC, ENTRUST and BYPASS are allowd for setsockopt() in PCB, * DISCARD, IPSEC and NONE are allowd for setkey() in SPD. * DISCARD and NONE are allowd for system default. */ #define IPSEC_POLICY_DISCARD 0 /* discarding packet */ #define IPSEC_POLICY_NONE 1 /* through IPsec engine */ #define IPSEC_POLICY_IPSEC 2 /* do IPsec */ #define IPSEC_POLICY_ENTRUST 3 /* consulting SPD if present. */ #define IPSEC_POLICY_BYPASS 4 /* only for privileged socket. */ /* Security protocol level */ #define IPSEC_LEVEL_DEFAULT 0 /* reference to system default */ #define IPSEC_LEVEL_USE 1 /* use SA if present. */ #define IPSEC_LEVEL_REQUIRE 2 /* require SA. */ #define IPSEC_REPLAYWSIZE 32 /* statistics for ipsec processing */ struct ipsecstat { u_quad_t in_success; /* succeeded inbound process */ u_quad_t in_polvio; /* security policy violation for inbound process */ u_quad_t in_nosa; /* inbound SA is unavailable */ u_quad_t in_inval; /* inbound processing failed due to EINVAL */ u_quad_t in_badspi; /* failed getting a SPI */ u_quad_t in_ahreplay; /* AH replay check failed */ u_quad_t in_espreplay; /* ESP replay check failed */ u_quad_t in_ahauthsucc; /* AH authentication success */ u_quad_t in_ahauthfail; /* AH authentication failure */ u_quad_t in_espauthsucc; /* ESP authentication success */ u_quad_t in_espauthfail; /* ESP authentication failure */ u_quad_t in_esphist[SADB_EALG_MAX]; u_quad_t in_ahhist[SADB_AALG_MAX]; u_quad_t out_success; /* succeeded outbound process */ u_quad_t out_polvio; /* security policy violation for outbound process */ u_quad_t out_nosa; /* outbound SA is unavailable */ u_quad_t out_inval; /* outbound process failed due to EINVAL */ u_quad_t out_noroute; /* there is no route */ u_quad_t out_esphist[SADB_EALG_MAX]; u_quad_t out_ahhist[SADB_AALG_MAX]; }; /* * Definitions for IPsec & Key sysctl operations. */ /* * Names for IPsec & Key sysctl objects */ #define IPSECCTL_STATS 1 /* stats */ #define IPSECCTL_DEF_POLICY 2 #define IPSECCTL_DEF_ESP_TRANSLEV 3 /* int; ESP transport mode */ #define IPSECCTL_DEF_ESP_NETLEV 4 /* int; ESP tunnel mode */ #define IPSECCTL_DEF_AH_TRANSLEV 5 /* int; AH transport mode */ #define IPSECCTL_DEF_AH_NETLEV 6 /* int; AH tunnel mode */ #define IPSECCTL_INBOUND_CALL_IKE 7 #define IPSECCTL_AH_CLEARTOS 8 #define IPSECCTL_AH_OFFSETMASK 9 #define IPSECCTL_DFBIT 10 #define IPSECCTL_ECN 11 #define IPSECCTL_MAXID 12 #define IPSECCTL_NAMES { \ { 0, 0 }, \ { 0, 0 }, \ { "def_policy", CTLTYPE_INT }, \ { "esp_trans_deflev", CTLTYPE_INT }, \ { "esp_net_deflev", CTLTYPE_INT }, \ { "ah_trans_deflev", CTLTYPE_INT }, \ { "ah_net_deflev", CTLTYPE_INT }, \ { "inbound_call_ike", CTLTYPE_INT }, \ { "ah_cleartos", CTLTYPE_INT }, \ { "ah_offsetmask", CTLTYPE_INT }, \ { "dfbit", CTLTYPE_INT }, \ { "ecn", CTLTYPE_INT }, \ } #define IPSEC6CTL_NAMES { \ { 0, 0 }, \ { 0, 0 }, \ { "def_policy", CTLTYPE_INT }, \ { "esp_trans_deflev", CTLTYPE_INT }, \ { "esp_net_deflev", CTLTYPE_INT }, \ { "ah_trans_deflev", CTLTYPE_INT }, \ { "ah_net_deflev", CTLTYPE_INT }, \ { "inbound_call_ike", CTLTYPE_INT }, \ { 0, 0 }, \ { 0, 0 }, \ { 0, 0 }, \ { "ecn", CTLTYPE_INT }, \ } #define IPSECCTL_VARS { \ 0, \ 0, \ &ip4_def_policy.policy, \ &ip4_esp_trans_deflev, \ &ip4_esp_net_deflev, \ &ip4_ah_trans_deflev, \ &ip4_ah_net_deflev, \ &ip4_inbound_call_ike, \ &ip4_ah_cleartos, \ &ip4_ah_offsetmask, \ &ip4_ipsec_dfbit, \ &ip4_ipsec_ecn, \ } #define IPSEC6CTL_VARS { \ 0, \ 0, \ &ip6_def_policy.policy, \ &ip6_esp_trans_deflev, \ &ip6_esp_net_deflev, \ &ip6_ah_trans_deflev, \ &ip6_ah_net_deflev, \ &ip6_inbound_call_ike, \ 0, \ 0, \ 0, \ &ip6_ipsec_ecn, \ } #ifdef KERNEL struct ipsec_output_state { struct mbuf *m; struct route *ro; struct sockaddr *dst; }; extern struct ipsecstat ipsecstat; extern struct secpolicy ip4_def_policy; extern int ip4_esp_trans_deflev; extern int ip4_esp_net_deflev; extern int ip4_ah_trans_deflev; extern int ip4_ah_net_deflev; extern int ip4_inbound_call_ike; extern int ip4_ah_cleartos; extern int ip4_ah_offsetmask; extern int ip4_ipsec_dfbit; extern int ip4_ipsec_ecn; #ifdef INET6 extern struct ipsecstat ipsec6stat; extern struct secpolicy ip6_def_policy; extern int ip6_esp_trans_deflev; extern int ip6_esp_net_deflev; extern int ip6_ah_trans_deflev; extern int ip6_ah_net_deflev; extern int ip6_inbound_call_ike; extern int ip6_ipsec_ecn; #endif extern struct secpolicy *ipsec4_getpolicybysock __P((struct mbuf *, struct socket *, int *)); extern struct secpolicy *ipsec4_getpolicybyaddr __P((struct mbuf *, int, int *)); #ifdef INET6 extern struct secpolicy *ipsec6_getpolicybysock __P((struct mbuf *, struct socket *, int *)); extern struct secpolicy *ipsec6_getpolicybyaddr __P((struct mbuf *, int, int *)); #endif /*INET6*/ struct inpcb; #ifdef INET6 struct in6pcb; #endif extern int ipsec_init_policy __P((struct secpolicy **)); extern struct secpolicy *ipsec_copy_policy __P((struct secpolicy *)); extern int ipsec_set_policy __P((struct secpolicy **, int, caddr_t, int, int)); extern int ipsec_get_policy __P((struct secpolicy *, struct mbuf **)); extern int ipsec4_delete_pcbpolicy __P((struct inpcb *)); #ifdef INET6 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 extern int ipsec6_delete_pcbpolicy __P((struct inpcb *)); #else extern int ipsec6_delete_pcbpolicy __P((struct in6pcb *)); #endif #endif extern u_int ipsec_get_reqlevel __P((struct ipsecrequest *)); extern int ipsec4_in_reject_so __P((struct mbuf *, struct socket *)); extern int ipsec4_in_reject __P((struct mbuf *, struct inpcb *)); #ifdef INET6 extern int ipsec6_in_reject_so __P((struct mbuf *, struct socket *)); #if defined(__FreeBSD__) && __FreeBSD__ >= 3 extern int ipsec6_in_reject __P((struct mbuf *, struct inpcb *)); #else extern int ipsec6_in_reject __P((struct mbuf *, struct in6pcb *)); #endif #endif /*INET6*/ struct secas; struct tcpcb; struct tcp6cb; extern int ipsec_chkreplay __P((u_int32_t, struct secas *)); extern int ipsec_updatereplay __P((u_int32_t, struct secas *)); extern size_t ipsec4_hdrsiz __P((struct mbuf *, struct inpcb *)); #if defined(__FreeBSD__) && __FreeBSD__ >= 3 extern size_t ipsec_hdrsiz_tcp __P((struct tcpcb *, int)); #else extern size_t ipsec4_hdrsiz_tcp __P((struct tcpcb *)); #endif #ifdef INET6 #if defined(__FreeBSD__) && __FreeBSD__ >= 3 extern size_t ipsec6_hdrsiz __P((struct mbuf *, struct inpcb *)); #else extern size_t ipsec6_hdrsiz __P((struct mbuf *, struct in6pcb *)); #if !defined(__NetBSD__) || defined(TCP6) extern size_t ipsec6_hdrsiz_tcp __P((struct tcp6cb *)); #else extern size_t ipsec6_hdrsiz_tcp __P((struct tcpcb *)); #endif #endif #endif struct ip; #ifdef INET6 struct ip6_hdr; #endif extern const char *ipsec4_logpacketstr __P((struct ip *, u_int32_t)); #ifdef INET6 extern const char *ipsec6_logpacketstr __P((struct ip6_hdr *, u_int32_t)); #endif extern const char *ipsec_logsastr __P((struct secas *)); extern void ipsec_dumpmbuf __P((struct mbuf *)); extern int ipsec4_output __P((struct ipsec_output_state *, struct secpolicy *, int)); #ifdef INET6 extern int ipsec6_output_trans __P((struct ipsec_output_state *, u_char *, struct mbuf *, struct secpolicy *, int, int *)); extern int ipsec6_output_tunnel __P((struct ipsec_output_state *, struct secpolicy *, int)); #endif extern int ipsec4_tunnel_validate __P((struct ip *, u_int, struct secas *)); #ifdef INET6 extern int ipsec6_tunnel_validate __P((struct ip6_hdr *, u_int, struct secas *)); #endif extern struct mbuf *ipsec_copypkt __P((struct mbuf *)); #if defined(__bsdi__) || defined(__NetBSD__) extern int ipsec_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); extern int ipsec6_sysctl __P((int *, u_int, void *, size_t *, void *, size_t)); #endif /* __bsdi__ || __NetBSD__ */ #endif /*KERNEL*/ #ifndef KERNEL extern int ipsec_get_policylen(char *reqstr); extern int ipsec_set_policy(char *buf, int len, char *reqstr); extern char *ipsec_dump_policy(char *buf, char *delimiter); extern char *ipsec_strerror(void); #endif /*!KERNEL*/ #endif /*_NETINET6_IPSEC_H_*/