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Diffstat (limited to 'src/pluto/kernel.h')
| -rw-r--r-- | src/pluto/kernel.h | 198 |
1 files changed, 198 insertions, 0 deletions
diff --git a/src/pluto/kernel.h b/src/pluto/kernel.h new file mode 100644 index 000000000..e7ff08c7b --- /dev/null +++ b/src/pluto/kernel.h @@ -0,0 +1,198 @@ +/* declarations of routines that interface with the kernel's IPsec mechanism + * Copyright (C) 1998-2001 D. Hugh Redelmeier. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY + * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License + * for more details. + * + * RCSID $Id: kernel.h,v 1.10 2006/03/08 22:12:37 as Exp $ + */ + +#include "connections.h" + +extern bool no_klips; /* don't actually use KLIPS */ +extern bool can_do_IPcomp; /* can system actually perform IPCOMP? */ + +#ifdef KLIPS +/* Declare eroute things early enough for uses. + * + * Flags are encoded above the low-order byte of verbs. + * "real" eroutes are only outbound. Inbound eroutes don't exist, + * but an addflow with an INBOUND flag allows IPIP tunnels to be + * limited to appropriate source and destination addresses. + */ + +#define ERO_MASK 0xFF +#define ERO_FLAG_SHIFT 8 + +#define ERO_DELETE SADB_X_DELFLOW +#define ERO_ADD SADB_X_ADDFLOW +#define ERO_REPLACE (SADB_X_ADDFLOW | (SADB_X_SAFLAGS_REPLACEFLOW << ERO_FLAG_SHIFT)) +#define ERO_ADD_INBOUND (SADB_X_ADDFLOW | (SADB_X_SAFLAGS_INFLOW << ERO_FLAG_SHIFT)) +#define ERO_DEL_INBOUND (SADB_X_DELFLOW | (SADB_X_SAFLAGS_INFLOW << ERO_FLAG_SHIFT)) + +struct pfkey_proto_info { + int proto; + int encapsulation; + unsigned reqid; +}; +struct sadb_msg; + +struct kernel_sa { + const ip_address *src; + const ip_address *dst; + + const ip_subnet *src_client; + const ip_subnet *dst_client; + + ipsec_spi_t spi; + unsigned proto; + unsigned satype; + unsigned transport_proto; + unsigned replay_window; + unsigned reqid; + + unsigned authalg; + unsigned authkeylen; + char *authkey; + + unsigned encalg; + unsigned enckeylen; + char *enckey; + + unsigned compalg; + + int encapsulation; + + u_int16_t natt_sport, natt_dport; + u_int8_t transid, natt_type; + ip_address *natt_oa; + + const char *text_said; +}; + +struct kernel_ops { + enum { + KERNEL_TYPE_NONE, + KERNEL_TYPE_KLIPS, + KERNEL_TYPE_LINUX, + } type; + bool inbound_eroute; + bool policy_lifetime; + int *async_fdp; + + void (*init)(void); + void (*pfkey_register)(void); + void (*pfkey_register_response)(const struct sadb_msg *msg); + void (*process_queue)(void); + void (*process_msg)(void); + bool (*raw_eroute)(const ip_address *this_host, + const ip_subnet *this_client, + const ip_address *that_host, + const ip_subnet *that_client, + ipsec_spi_t spi, + unsigned int satype, + unsigned int transport_proto, + const struct pfkey_proto_info *proto_info, + time_t use_lifetime, + unsigned int op, + const char *text_said); + bool (*get_policy)(const struct kernel_sa *sa, bool inbound, + time_t *use_time); + bool (*add_sa)(const struct kernel_sa *sa, bool replace); + bool (*grp_sa)(const struct kernel_sa *sa_outer, + const struct kernel_sa *sa_inner); + bool (*del_sa)(const struct kernel_sa *sa); + bool (*get_sa)(const struct kernel_sa *sa, u_int *bytes); + ipsec_spi_t (*get_spi)(const ip_address *src, + const ip_address *dst, + int proto, + bool tunnel_mode, + unsigned reqid, + ipsec_spi_t min, + ipsec_spi_t max, + const char *text_said); +}; + + +extern const struct kernel_ops *kernel_ops; + +/* information from /proc/net/ipsec_eroute */ + +struct eroute_info { + unsigned long count; + ip_subnet ours; + ip_subnet his; + ip_address dst; + ip_said said; + int transport_proto; + struct eroute_info *next; +}; + +extern struct eroute_info *orphaned_holds; + +extern void show_shunt_status(void); +#endif + +/* A netlink header defines EM_MAXRELSPIS, the max number of SAs in a group. + * Is there a PF_KEY equivalent? + */ +#ifndef EM_MAXRELSPIS +# define EM_MAXRELSPIS 4 /* AH ESP IPCOMP IPIP */ +#endif + +extern void record_and_initiate_opportunistic(const ip_subnet * + , const ip_subnet * + , int transport_proto + , const char *why); + +extern void init_kernel(void); + +extern void scan_proc_shunts(void); + +extern bool trap_connection(struct connection *c); +extern void unroute_connection(struct connection *c); + +extern bool has_bare_hold(const ip_address *src, const ip_address *dst + , int transport_proto); + +extern bool replace_bare_shunt(const ip_address *src, const ip_address *dst + , policy_prio_t policy_prio + , ipsec_spi_t shunt_spi /* in host order! */ + , bool repl + , unsigned int transport_proto + , const char *why); + +extern bool assign_hold(struct connection *c + , struct spd_route *sr + , int transport_proto + , const ip_address *src, const ip_address *dst); + +extern ipsec_spi_t shunt_policy_spi(struct connection *c, bool prospective); + + +struct state; /* forward declaration of tag */ +extern ipsec_spi_t get_ipsec_spi(ipsec_spi_t avoid + , int proto + , struct spd_route *sr + , bool tunnel_mode); +extern ipsec_spi_t get_my_cpi(struct spd_route *sr, bool tunnel_mode); + +extern bool install_inbound_ipsec_sa(struct state *st); +extern bool install_ipsec_sa(struct state *st, bool inbound_also); +extern void delete_ipsec_sa(struct state *st, bool inbound_only); +extern bool route_and_eroute(struct connection *c + , struct spd_route *sr + , struct state *st); +extern bool was_eroute_idle(struct state *st, time_t idle_max + , time_t *idle_time); +extern bool get_sa_info(struct state *st, bool inbound, u_int *bytes + , time_t *use_time); + +extern bool update_ipsec_sa(struct state *st); |