433 lines
12 KiB
C
433 lines
12 KiB
C
/*
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* Copyright (C) 2008-2009 Tobias Brunner
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* Hochschule fuer Technik Rapperswil
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "kernel_interface.h"
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#include <pthread.h>
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#include <daemon.h>
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typedef struct private_kernel_interface_t private_kernel_interface_t;
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/**
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* Private data of a kernel_interface_t object.
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*/
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struct private_kernel_interface_t {
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/**
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* Public part of kernel_interface_t object.
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*/
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kernel_interface_t public;
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/**
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* ipsec interface
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*/
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kernel_ipsec_t *ipsec;
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/**
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* network interface
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*/
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kernel_net_t *net;
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};
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/**
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* Implementation of kernel_interface_t.get_spi
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*/
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static status_t get_spi(private_kernel_interface_t *this, host_t *src, host_t *dst,
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protocol_id_t protocol, u_int32_t reqid, u_int32_t *spi)
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{
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if (!this->ipsec)
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{
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return NOT_SUPPORTED;
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}
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return this->ipsec->get_spi(this->ipsec, src, dst, protocol, reqid, spi);
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}
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/**
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* Implementation of kernel_interface_t.get_cpi
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*/
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static status_t get_cpi(private_kernel_interface_t *this, host_t *src, host_t *dst,
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u_int32_t reqid, u_int16_t *cpi)
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{
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if (!this->ipsec)
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{
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return NOT_SUPPORTED;
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}
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return this->ipsec->get_cpi(this->ipsec, src, dst, reqid, cpi);
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}
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/**
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* Implementation of kernel_interface_t.add_sa
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*/
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static status_t add_sa(private_kernel_interface_t *this, host_t *src, host_t *dst,
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u_int32_t spi, protocol_id_t protocol, u_int32_t reqid,
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lifetime_cfg_t *lifetime,
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u_int16_t enc_alg, chunk_t enc_key,
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u_int16_t int_alg, chunk_t int_key,
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ipsec_mode_t mode, u_int16_t ipcomp, u_int16_t cpi, bool encap,
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bool inbound, traffic_selector_t *src_ts,
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traffic_selector_t *dst_ts)
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{
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if (!this->ipsec)
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{
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return NOT_SUPPORTED;
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}
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return this->ipsec->add_sa(this->ipsec, src, dst, spi, protocol, reqid,
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lifetime, enc_alg, enc_key, int_alg, int_key, mode, ipcomp, cpi,
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encap, inbound, src_ts, dst_ts);
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}
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/**
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* Implementation of kernel_interface_t.update_sa
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*/
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static status_t update_sa(private_kernel_interface_t *this, u_int32_t spi,
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protocol_id_t protocol, u_int16_t cpi, host_t *src, host_t *dst,
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host_t *new_src, host_t *new_dst, bool encap, bool new_encap)
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{
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if (!this->ipsec)
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{
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return NOT_SUPPORTED;
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}
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return this->ipsec->update_sa(this->ipsec, spi, protocol, cpi, src, dst,
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new_src, new_dst, encap, new_encap);
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}
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/**
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* Implementation of kernel_interface_t.query_sa
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*/
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static status_t query_sa(private_kernel_interface_t *this, host_t *src, host_t *dst,
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u_int32_t spi, protocol_id_t protocol, u_int64_t *bytes)
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{
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if (!this->ipsec)
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{
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return NOT_SUPPORTED;
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}
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return this->ipsec->query_sa(this->ipsec, src, dst, spi, protocol, bytes);
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}
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/**
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* Implementation of kernel_interface_t.del_sa
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*/
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static status_t del_sa(private_kernel_interface_t *this, host_t *src, host_t *dst,
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u_int32_t spi, protocol_id_t protocol, u_int16_t cpi)
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{
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if (!this->ipsec)
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{
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return NOT_SUPPORTED;
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}
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return this->ipsec->del_sa(this->ipsec, src, dst, spi, protocol, cpi);
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}
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/**
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* Implementation of kernel_interface_t.add_policy
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*/
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static status_t add_policy(private_kernel_interface_t *this, host_t *src, host_t *dst,
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traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
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policy_dir_t direction, u_int32_t spi, protocol_id_t protocol,
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u_int32_t reqid, ipsec_mode_t mode, u_int16_t ipcomp, u_int16_t cpi,
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bool routed)
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{
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if (!this->ipsec)
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{
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return NOT_SUPPORTED;
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}
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return this->ipsec->add_policy(this->ipsec, src, dst, src_ts, dst_ts,
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direction, spi, protocol, reqid, mode, ipcomp, cpi, routed);
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}
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/**
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* Implementation of kernel_interface_t.query_policy
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*/
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static status_t query_policy(private_kernel_interface_t *this,
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traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
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policy_dir_t direction, u_int32_t *use_time)
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{
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if (!this->ipsec)
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{
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return NOT_SUPPORTED;
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}
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return this->ipsec->query_policy(this->ipsec, src_ts, dst_ts, direction, use_time);
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}
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/**
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* Implementation of kernel_interface_t.del_policy
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*/
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static status_t del_policy(private_kernel_interface_t *this,
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traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
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policy_dir_t direction, bool unrouted)
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{
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if (!this->ipsec)
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{
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return NOT_SUPPORTED;
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}
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return this->ipsec->del_policy(this->ipsec, src_ts, dst_ts, direction, unrouted);
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}
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/**
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* Implementation of kernel_interface_t.get_source_addr
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*/
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static host_t *get_source_addr(private_kernel_interface_t *this,
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host_t *dest, host_t *src)
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{
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if (!this->net)
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{
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return NULL;
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}
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return this->net->get_source_addr(this->net, dest, src);
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}
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/**
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* Implementation of kernel_interface_t.get_nexthop
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*/
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static host_t *get_nexthop(private_kernel_interface_t *this, host_t *dest)
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{
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if (!this->net)
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{
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return NULL;
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}
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return this->net->get_nexthop(this->net, dest);
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}
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/**
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* Implementation of kernel_interface_t.get_interface
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*/
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static char* get_interface(private_kernel_interface_t *this, host_t *host)
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{
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if (!this->net)
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{
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return NULL;
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}
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return this->net->get_interface(this->net, host);
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}
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/**
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* Implementation of kernel_interface_t.create_address_enumerator
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*/
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static enumerator_t *create_address_enumerator(private_kernel_interface_t *this,
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bool include_down_ifaces, bool include_virtual_ips)
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{
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if (!this->net)
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{
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return enumerator_create_empty();
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}
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return this->net->create_address_enumerator(this->net, include_down_ifaces,
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include_virtual_ips);
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}
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/**
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* Implementation of kernel_interface_t.add_ip
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*/
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static status_t add_ip(private_kernel_interface_t *this, host_t *virtual_ip,
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host_t *iface_ip)
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{
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if (!this->net)
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{
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return NOT_SUPPORTED;
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}
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return this->net->add_ip(this->net, virtual_ip, iface_ip);
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}
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/**
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* Implementation of kernel_interface_t.del_ip
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*/
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static status_t del_ip(private_kernel_interface_t *this, host_t *virtual_ip)
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{
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if (!this->net)
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{
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return NOT_SUPPORTED;
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}
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return this->net->del_ip(this->net, virtual_ip);
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}
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/**
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* Implementation of kernel_interface_t.add_route
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*/
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static status_t add_route(private_kernel_interface_t *this, chunk_t dst_net,
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u_int8_t prefixlen, host_t *gateway, host_t *src_ip, char *if_name)
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{
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if (!this->net)
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{
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return NOT_SUPPORTED;
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}
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return this->net->add_route(this->net, dst_net, prefixlen, gateway, src_ip,
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if_name);
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}
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/**
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* Implementation of kernel_interface_t.del_route
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*/
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static status_t del_route(private_kernel_interface_t *this, chunk_t dst_net,
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u_int8_t prefixlen, host_t *gateway, host_t *src_ip, char *if_name)
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{
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if (!this->net)
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{
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return NOT_SUPPORTED;
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}
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return this->net->del_route(this->net, dst_net, prefixlen, gateway, src_ip,
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if_name);
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}
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/**
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* Implementation of kernel_interface_t.get_address_by_ts
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*/
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static status_t get_address_by_ts(private_kernel_interface_t *this,
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traffic_selector_t *ts, host_t **ip)
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{
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enumerator_t *addrs;
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host_t *host;
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int family;
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bool found = FALSE;
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DBG2(DBG_KNL, "getting a local address in traffic selector %R", ts);
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/* if we have a family which includes localhost, we do not
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* search for an IP, we use the default */
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family = ts->get_type(ts) == TS_IPV4_ADDR_RANGE ? AF_INET : AF_INET6;
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if (family == AF_INET)
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{
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host = host_create_from_string("127.0.0.1", 0);
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}
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else
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{
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host = host_create_from_string("::1", 0);
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}
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if (ts->includes(ts, host))
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{
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*ip = host_create_any(family);
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host->destroy(host);
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DBG2(DBG_KNL, "using host %H", *ip);
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return SUCCESS;
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}
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host->destroy(host);
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addrs = create_address_enumerator(this, TRUE, TRUE);
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while (addrs->enumerate(addrs, (void**)&host))
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{
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if (ts->includes(ts, host))
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{
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found = TRUE;
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*ip = host->clone(host);
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break;
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}
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}
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addrs->destroy(addrs);
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if (!found)
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{
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DBG1(DBG_KNL, "no local address found in traffic selector %R", ts);
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return FAILED;
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}
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DBG2(DBG_KNL, "using host %H", *ip);
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return SUCCESS;
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}
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/**
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* Implementation of kernel_interface_t.add_ipsec_interface.
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*/
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static void add_ipsec_interface(private_kernel_interface_t *this,
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kernel_ipsec_constructor_t constructor)
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{
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if (!this->ipsec)
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{
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this->ipsec = constructor();
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}
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}
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/**
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* Implementation of kernel_interface_t.remove_ipsec_interface.
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*/
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static void remove_ipsec_interface(private_kernel_interface_t *this,
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kernel_ipsec_constructor_t constructor)
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{
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/* TODO: replace if interface currently in use */
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}
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/**
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* Implementation of kernel_interface_t.add_net_interface.
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*/
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static void add_net_interface(private_kernel_interface_t *this,
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kernel_net_constructor_t constructor)
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{
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if (!this->net)
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{
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this->net = constructor();
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}
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}
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/**
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* Implementation of kernel_interface_t.remove_net_interface.
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*/
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static void remove_net_interface(private_kernel_interface_t *this,
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kernel_net_constructor_t constructor)
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{
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/* TODO: replace if interface currently in use */
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}
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/**
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* Implementation of kernel_interface_t.destroy.
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*/
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static void destroy(private_kernel_interface_t *this)
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{
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DESTROY_IF(this->ipsec);
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DESTROY_IF(this->net);
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free(this);
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}
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/*
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* Described in header-file
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*/
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kernel_interface_t *kernel_interface_create()
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{
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private_kernel_interface_t *this = malloc_thing(private_kernel_interface_t);
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this->public.get_spi = (status_t(*)(kernel_interface_t*,host_t*,host_t*,protocol_id_t,u_int32_t,u_int32_t*))get_spi;
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this->public.get_cpi = (status_t(*)(kernel_interface_t*,host_t*,host_t*,u_int32_t,u_int16_t*))get_cpi;
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this->public.add_sa = (status_t(*)(kernel_interface_t *,host_t*,host_t*,u_int32_t,protocol_id_t,u_int32_t,lifetime_cfg_t*,u_int16_t,chunk_t,u_int16_t,chunk_t,ipsec_mode_t,u_int16_t,u_int16_t,bool,bool,traffic_selector_t*,traffic_selector_t*))add_sa;
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this->public.update_sa = (status_t(*)(kernel_interface_t*,u_int32_t,protocol_id_t,u_int16_t,host_t*,host_t*,host_t*,host_t*,bool,bool))update_sa;
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this->public.query_sa = (status_t(*)(kernel_interface_t*,host_t*,host_t*,u_int32_t,protocol_id_t,u_int64_t*))query_sa;
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this->public.del_sa = (status_t(*)(kernel_interface_t*,host_t*,host_t*,u_int32_t,protocol_id_t,u_int16_t))del_sa;
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this->public.add_policy = (status_t(*)(kernel_interface_t*,host_t*,host_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,u_int32_t,protocol_id_t,u_int32_t,ipsec_mode_t,u_int16_t,u_int16_t,bool))add_policy;
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this->public.query_policy = (status_t(*)(kernel_interface_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,u_int32_t*))query_policy;
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this->public.del_policy = (status_t(*)(kernel_interface_t*,traffic_selector_t*,traffic_selector_t*,policy_dir_t,bool))del_policy;
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this->public.get_source_addr = (host_t*(*)(kernel_interface_t*, host_t *dest, host_t *src))get_source_addr;
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this->public.get_nexthop = (host_t*(*)(kernel_interface_t*, host_t *dest))get_nexthop;
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this->public.get_interface = (char*(*)(kernel_interface_t*,host_t*))get_interface;
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this->public.create_address_enumerator = (enumerator_t*(*)(kernel_interface_t*,bool,bool))create_address_enumerator;
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this->public.add_ip = (status_t(*)(kernel_interface_t*,host_t*,host_t*)) add_ip;
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this->public.del_ip = (status_t(*)(kernel_interface_t*,host_t*)) del_ip;
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this->public.add_route = (status_t(*)(kernel_interface_t*,chunk_t,u_int8_t,host_t*,host_t*,char*)) add_route;
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this->public.del_route = (status_t(*)(kernel_interface_t*,chunk_t,u_int8_t,host_t*,host_t*,char*)) del_route;
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this->public.get_address_by_ts = (status_t(*)(kernel_interface_t*,traffic_selector_t*,host_t**))get_address_by_ts;
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this->public.add_ipsec_interface = (void(*)(kernel_interface_t*, kernel_ipsec_constructor_t))add_ipsec_interface;
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this->public.remove_ipsec_interface = (void(*)(kernel_interface_t*, kernel_ipsec_constructor_t))remove_ipsec_interface;
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this->public.add_net_interface = (void(*)(kernel_interface_t*, kernel_net_constructor_t))add_net_interface;
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this->public.remove_net_interface = (void(*)(kernel_interface_t*, kernel_net_constructor_t))remove_net_interface;
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this->public.destroy = (void (*)(kernel_interface_t*))destroy;
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this->ipsec = NULL;
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this->net = NULL;
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return &this->public;
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}
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