524 lines
13 KiB
C
524 lines
13 KiB
C
/*
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* Copyright (C) 2008-2010 Tobias Brunner
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* Hochschule fuer Technik Rapperswil
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* Copyright (C) 2010 Martin Willi
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* Copyright (C) 2010 revosec AG
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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 <debug.h>
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#include <threading/mutex.h>
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#include <utils/linked_list.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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* mutex for listeners
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*/
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mutex_t *mutex;
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/**
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* list of registered listeners
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*/
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linked_list_t *listeners;
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};
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METHOD(kernel_interface_t, get_spi, status_t,
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private_kernel_interface_t *this, host_t *src, host_t *dst,
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u_int8_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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METHOD(kernel_interface_t, get_cpi, status_t,
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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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METHOD(kernel_interface_t, add_sa, status_t,
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private_kernel_interface_t *this, host_t *src, host_t *dst,
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u_int32_t spi, u_int8_t protocol, u_int32_t reqid,
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mark_t mark, lifetime_cfg_t *lifetime, u_int16_t enc_alg, chunk_t enc_key,
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u_int16_t int_alg, chunk_t int_key, ipsec_mode_t mode, u_int16_t ipcomp,
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u_int16_t cpi, bool encap, 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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mark, lifetime, enc_alg, enc_key, int_alg, int_key, mode, ipcomp,
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cpi, encap, inbound, src_ts, dst_ts);
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}
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METHOD(kernel_interface_t, update_sa, status_t,
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private_kernel_interface_t *this, u_int32_t spi, u_int8_t protocol,
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u_int16_t cpi, host_t *src, host_t *dst, host_t *new_src, host_t *new_dst,
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bool encap, bool new_encap, mark_t mark)
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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, mark);
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}
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METHOD(kernel_interface_t, query_sa, status_t,
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private_kernel_interface_t *this, host_t *src, host_t *dst,
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u_int32_t spi, u_int8_t protocol, mark_t mark, 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, mark, bytes);
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}
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METHOD(kernel_interface_t, del_sa, status_t,
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private_kernel_interface_t *this, host_t *src, host_t *dst, u_int32_t spi,
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u_int8_t protocol, u_int16_t cpi, mark_t mark)
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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, mark);
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}
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METHOD(kernel_interface_t, add_policy, status_t,
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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, u_int32_t ah_spi,
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u_int32_t reqid, mark_t mark, ipsec_mode_t mode, u_int16_t ipcomp,
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u_int16_t cpi, 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, ah_spi, reqid, mark, mode, ipcomp, cpi, routed);
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}
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METHOD(kernel_interface_t, query_policy, status_t,
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private_kernel_interface_t *this, traffic_selector_t *src_ts,
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traffic_selector_t *dst_ts, policy_dir_t direction, mark_t mark,
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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,
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direction, mark, use_time);
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}
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METHOD(kernel_interface_t, del_policy, status_t,
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private_kernel_interface_t *this, traffic_selector_t *src_ts,
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traffic_selector_t *dst_ts, policy_dir_t direction, mark_t mark,
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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,
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direction, mark, unrouted);
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}
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METHOD(kernel_interface_t, get_source_addr, host_t*,
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private_kernel_interface_t *this, 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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METHOD(kernel_interface_t, get_nexthop, host_t*,
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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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METHOD(kernel_interface_t, get_interface, char*,
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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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METHOD(kernel_interface_t, create_address_enumerator, enumerator_t*,
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private_kernel_interface_t *this, bool include_down_ifaces,
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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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METHOD(kernel_interface_t, add_ip, status_t,
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private_kernel_interface_t *this, host_t *virtual_ip, 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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METHOD(kernel_interface_t, del_ip, status_t,
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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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METHOD(kernel_interface_t, add_route, status_t,
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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,
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src_ip, if_name);
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}
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METHOD(kernel_interface_t, del_route, status_t,
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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,
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src_ip, if_name);
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}
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METHOD(kernel_interface_t, bypass_socket, bool,
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private_kernel_interface_t *this, int fd, int family)
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{
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if (!this->ipsec)
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{
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return FALSE;
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}
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return this->ipsec->bypass_socket(this->ipsec, fd, family);
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}
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METHOD(kernel_interface_t, get_address_by_ts, status_t,
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private_kernel_interface_t *this, 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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METHOD(kernel_interface_t, add_ipsec_interface, void,
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private_kernel_interface_t *this, 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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METHOD(kernel_interface_t, remove_ipsec_interface, void,
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private_kernel_interface_t *this, 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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METHOD(kernel_interface_t, add_net_interface, void,
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private_kernel_interface_t *this, 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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METHOD(kernel_interface_t, remove_net_interface, void,
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private_kernel_interface_t *this, 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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METHOD(kernel_interface_t, add_listener, void,
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private_kernel_interface_t *this, kernel_listener_t *listener)
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{
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this->mutex->lock(this->mutex);
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this->listeners->insert_last(this->listeners, listener);
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this->mutex->unlock(this->mutex);
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}
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METHOD(kernel_interface_t, remove_listener, void,
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private_kernel_interface_t *this, kernel_listener_t *listener)
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{
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this->mutex->lock(this->mutex);
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this->listeners->remove(this->listeners, listener, NULL);
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this->mutex->unlock(this->mutex);
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}
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METHOD(kernel_interface_t, acquire, void,
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private_kernel_interface_t *this, u_int32_t reqid,
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traffic_selector_t *src_ts, traffic_selector_t *dst_ts)
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{
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kernel_listener_t *listener;
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enumerator_t *enumerator;
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this->mutex->lock(this->mutex);
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enumerator = this->listeners->create_enumerator(this->listeners);
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while (enumerator->enumerate(enumerator, &listener))
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{
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if (listener->acquire &&
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!listener->acquire(listener, reqid, src_ts, dst_ts))
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{
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this->listeners->remove_at(this->listeners, enumerator);
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}
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}
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enumerator->destroy(enumerator);
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this->mutex->unlock(this->mutex);
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}
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METHOD(kernel_interface_t, expire, void,
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private_kernel_interface_t *this, u_int32_t reqid, u_int8_t protocol,
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u_int32_t spi, bool hard)
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{
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kernel_listener_t *listener;
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enumerator_t *enumerator;
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this->mutex->lock(this->mutex);
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enumerator = this->listeners->create_enumerator(this->listeners);
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while (enumerator->enumerate(enumerator, &listener))
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{
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if (listener->expire &&
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!listener->expire(listener, reqid, protocol, spi, hard))
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{
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this->listeners->remove_at(this->listeners, enumerator);
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}
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}
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enumerator->destroy(enumerator);
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this->mutex->unlock(this->mutex);
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}
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METHOD(kernel_interface_t, mapping, void,
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private_kernel_interface_t *this, u_int32_t reqid, u_int32_t spi,
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host_t *remote)
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{
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kernel_listener_t *listener;
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enumerator_t *enumerator;
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this->mutex->lock(this->mutex);
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enumerator = this->listeners->create_enumerator(this->listeners);
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while (enumerator->enumerate(enumerator, &listener))
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{
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if (listener->mapping &&
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!listener->mapping(listener, reqid, spi, remote))
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{
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this->listeners->remove_at(this->listeners, enumerator);
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}
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}
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enumerator->destroy(enumerator);
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this->mutex->unlock(this->mutex);
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}
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METHOD(kernel_interface_t, migrate, void,
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private_kernel_interface_t *this, u_int32_t reqid,
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traffic_selector_t *src_ts, traffic_selector_t *dst_ts,
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policy_dir_t direction, host_t *local, host_t *remote)
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{
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kernel_listener_t *listener;
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enumerator_t *enumerator;
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this->mutex->lock(this->mutex);
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enumerator = this->listeners->create_enumerator(this->listeners);
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while (enumerator->enumerate(enumerator, &listener))
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{
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if (listener->migrate &&
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!listener->migrate(listener, reqid, src_ts, dst_ts, direction,
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local, remote))
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{
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this->listeners->remove_at(this->listeners, enumerator);
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}
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}
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enumerator->destroy(enumerator);
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this->mutex->unlock(this->mutex);
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}
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static bool call_roam(kernel_listener_t *listener, bool *roam)
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{
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return listener->roam && !listener->roam(listener, *roam);
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}
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METHOD(kernel_interface_t, roam, void,
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private_kernel_interface_t *this, bool address)
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{
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this->mutex->lock(this->mutex);
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this->listeners->remove(this->listeners, &address, (void*)call_roam);
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this->mutex->unlock(this->mutex);
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}
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METHOD(kernel_interface_t, destroy, void,
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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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this->mutex->destroy(this->mutex);
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this->listeners->destroy(this->listeners);
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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;
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INIT(this,
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.public = {
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.get_spi = _get_spi,
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.get_cpi = _get_cpi,
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.add_sa = _add_sa,
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.update_sa = _update_sa,
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.query_sa = _query_sa,
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.del_sa = _del_sa,
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.add_policy = _add_policy,
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.query_policy = _query_policy,
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.del_policy = _del_policy,
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.get_source_addr = _get_source_addr,
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.get_nexthop = _get_nexthop,
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.get_interface = _get_interface,
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.create_address_enumerator = _create_address_enumerator,
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.add_ip = _add_ip,
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.del_ip = _del_ip,
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.add_route = _add_route,
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.del_route = _del_route,
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.bypass_socket = _bypass_socket,
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.get_address_by_ts = _get_address_by_ts,
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.add_ipsec_interface = _add_ipsec_interface,
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.remove_ipsec_interface = _remove_ipsec_interface,
|
|
.add_net_interface = _add_net_interface,
|
|
.remove_net_interface = _remove_net_interface,
|
|
|
|
.add_listener = _add_listener,
|
|
.remove_listener = _remove_listener,
|
|
.acquire = _acquire,
|
|
.expire = _expire,
|
|
.mapping = _mapping,
|
|
.migrate = _migrate,
|
|
.roam = _roam,
|
|
.destroy = _destroy,
|
|
},
|
|
.mutex = mutex_create(MUTEX_TYPE_DEFAULT),
|
|
.listeners = linked_list_create(),
|
|
);
|
|
|
|
return &this->public;
|
|
}
|
|
|