360 lines
8.4 KiB
C
360 lines
8.4 KiB
C
/*
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* Copyright (C) 2008 Thomas Kallenberg
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* Copyright (C) 2008 Tobias Brunner
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* Copyright (C) 2008 Martin Willi
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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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#define _GNU_SOURCE
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#include <string.h>
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#include "uci_config.h"
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#include "uci_parser.h"
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#include <daemon.h>
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typedef struct private_uci_config_t private_uci_config_t;
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/**
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* Private data of an uci_config_t object
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*/
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struct private_uci_config_t {
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/**
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* Public part
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*/
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uci_config_t public;
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/**
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* UCI parser context
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*/
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uci_parser_t *parser;
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};
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/**
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* enumerator implementation for create_peer_cfg_enumerator
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*/
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typedef struct {
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/** implements enumerator */
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enumerator_t public;
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/** currently enumerated peer config */
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peer_cfg_t *peer_cfg;
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/** inner uci_parser section enumerator */
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enumerator_t *inner;
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} peer_enumerator_t;
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/**
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* create a proposal from a string, with fallback to default
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*/
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static proposal_t *create_proposal(char *string, protocol_id_t proto)
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{
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proposal_t *proposal = NULL;
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if (string)
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{
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proposal = proposal_create_from_string(proto, string);
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}
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if (!proposal)
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{ /* UCI default is aes/sha1 only */
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if (proto == PROTO_IKE)
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{
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proposal = proposal_create_from_string(proto,
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"aes128-aes192-aes256-sha1-modp1536-modp2048");
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}
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else
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{
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proposal = proposal_create_from_string(proto,
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"aes128-aes192-aes256-sha1");
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}
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}
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return proposal;
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}
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/**
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* create an traffic selector, fallback to dynamic
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*/
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static traffic_selector_t *create_ts(char *string)
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{
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if (string)
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{
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int netbits = 32;
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host_t *net;
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char *pos;
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string = strdupa(string);
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pos = strchr(string, '/');
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if (pos)
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{
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*pos++ = '\0';
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netbits = atoi(pos);
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}
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else
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{
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if (strchr(string, ':'))
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{
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netbits = 128;
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}
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}
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net = host_create_from_string(string, 0);
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if (net)
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{
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return traffic_selector_create_from_subnet(net, netbits, 0, 0);
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}
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}
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return traffic_selector_create_dynamic(0, 0, 65535);
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}
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/**
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* create a rekey time from a string with hours, with fallback
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*/
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static u_int create_rekey(char *string)
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{
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u_int rekey = 0;
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if (string)
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{
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rekey = atoi(string);
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if (rekey)
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{
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return rekey * 3600;
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}
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}
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/* every 12 hours */
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return 12 * 3600;
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}
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METHOD(enumerator_t, peer_enumerator_enumerate, bool,
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peer_enumerator_t *this, peer_cfg_t **cfg)
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{
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char *name, *ike_proposal, *esp_proposal, *ike_rekey, *esp_rekey;
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char *local_id, *local_addr, *local_net;
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char *remote_id, *remote_addr, *remote_net;
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child_cfg_t *child_cfg;
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ike_cfg_t *ike_cfg;
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auth_cfg_t *auth;
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lifetime_cfg_t lifetime = {
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.time = {
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.life = create_rekey(esp_rekey) + 300,
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.rekey = create_rekey(esp_rekey),
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.jitter = 300
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}
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};
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/* defaults */
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name = "unnamed";
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local_id = NULL;
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remote_id = NULL;
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local_addr = "0.0.0.0";
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remote_addr = "0.0.0.0";
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local_net = NULL;
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remote_net = NULL;
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ike_proposal = NULL;
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esp_proposal = NULL;
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ike_rekey = NULL;
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esp_rekey = NULL;
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if (this->inner->enumerate(this->inner, &name, &local_id, &remote_id,
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&local_addr, &remote_addr, &local_net, &remote_net,
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&ike_proposal, &esp_proposal, &ike_rekey, &esp_rekey))
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{
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DESTROY_IF(this->peer_cfg);
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ike_cfg = ike_cfg_create(FALSE, FALSE,
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local_addr, FALSE, CHARON_UDP_PORT,
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remote_addr, FALSE, IKEV2_UDP_PORT);
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ike_cfg->add_proposal(ike_cfg, create_proposal(ike_proposal, PROTO_IKE));
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this->peer_cfg = peer_cfg_create(
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name, IKEV2, ike_cfg, CERT_SEND_IF_ASKED, UNIQUE_NO,
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1, create_rekey(ike_rekey), 0, /* keytries, rekey, reauth */
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1800, 900, /* jitter, overtime */
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TRUE, FALSE, /* mobike, aggressive */
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60, 0, /* DPD delay, timeout */
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NULL, NULL, /* vip, pool */
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FALSE, NULL, NULL); /* mediation, med by, peer id */
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auth = auth_cfg_create();
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auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PSK);
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auth->add(auth, AUTH_RULE_IDENTITY,
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identification_create_from_string(local_id));
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this->peer_cfg->add_auth_cfg(this->peer_cfg, auth, TRUE);
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auth = auth_cfg_create();
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auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PSK);
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if (remote_id)
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{
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auth->add(auth, AUTH_RULE_IDENTITY,
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identification_create_from_string(remote_id));
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}
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this->peer_cfg->add_auth_cfg(this->peer_cfg, auth, FALSE);
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child_cfg = child_cfg_create(name, &lifetime, NULL, TRUE, MODE_TUNNEL,
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ACTION_NONE, ACTION_NONE, ACTION_NONE,
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FALSE, 0, 0, NULL, NULL, 0);
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child_cfg->add_proposal(child_cfg, create_proposal(esp_proposal, PROTO_ESP));
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child_cfg->add_traffic_selector(child_cfg, TRUE, create_ts(local_net));
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child_cfg->add_traffic_selector(child_cfg, FALSE, create_ts(remote_net));
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this->peer_cfg->add_child_cfg(this->peer_cfg, child_cfg);
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*cfg = this->peer_cfg;
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return TRUE;
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}
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return FALSE;
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}
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METHOD(enumerator_t, peer_enumerator_destroy, void,
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peer_enumerator_t *this)
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{
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DESTROY_IF(this->peer_cfg);
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this->inner->destroy(this->inner);
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free(this);
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}
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METHOD(backend_t, create_peer_cfg_enumerator, enumerator_t*,
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private_uci_config_t *this, identification_t *me, identification_t *other)
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{
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peer_enumerator_t *e;
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INIT(e,
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.public = {
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.enumerate = (void*)_peer_enumerator_enumerate,
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.destroy = _peer_enumerator_destroy,
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},
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.inner = this->parser->create_section_enumerator(this->parser,
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"local_id", "remote_id", "local_addr", "remote_addr",
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"local_net", "remote_net", "ike_proposal", "esp_proposal",
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"ike_rekey", "esp_rekey", NULL),
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);
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if (!e->inner)
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{
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free(e);
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return NULL;
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}
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return &e->public;
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}
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/**
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* enumerator implementation for create_ike_cfg_enumerator
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*/
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typedef struct {
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/** implements enumerator */
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enumerator_t public;
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/** currently enumerated ike config */
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ike_cfg_t *ike_cfg;
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/** inner uci_parser section enumerator */
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enumerator_t *inner;
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} ike_enumerator_t;
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METHOD(enumerator_t, ike_enumerator_enumerate, bool,
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ike_enumerator_t *this, ike_cfg_t **cfg)
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{
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char *local_addr, *remote_addr, *ike_proposal;
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/* defaults */
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local_addr = "0.0.0.0";
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remote_addr = "0.0.0.0";
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ike_proposal = NULL;
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if (this->inner->enumerate(this->inner, NULL,
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&local_addr, &remote_addr, &ike_proposal))
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{
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DESTROY_IF(this->ike_cfg);
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this->ike_cfg = ike_cfg_create(FALSE, FALSE,
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local_addr, FALSE, CHARON_UDP_PORT,
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remote_addr, FALSE, IKEV2_UDP_PORT);
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this->ike_cfg->add_proposal(this->ike_cfg,
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create_proposal(ike_proposal, PROTO_IKE));
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*cfg = this->ike_cfg;
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return TRUE;
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}
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return FALSE;
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}
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METHOD(enumerator_t, ike_enumerator_destroy, void,
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ike_enumerator_t *this)
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{
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DESTROY_IF(this->ike_cfg);
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this->inner->destroy(this->inner);
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free(this);
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}
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METHOD(backend_t, create_ike_cfg_enumerator, enumerator_t*,
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private_uci_config_t *this, host_t *me, host_t *other)
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{
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ike_enumerator_t *e;
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INIT(e,
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.public = {
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.enumerate = (void*)_ike_enumerator_enumerate,
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.destroy = _ike_enumerator_destroy,
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},
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.inner = this->parser->create_section_enumerator(this->parser,
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"local_addr", "remote_addr", "ike_proposal", NULL),
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);
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if (!e->inner)
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{
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free(e);
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return NULL;
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}
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return &e->public;
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}
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METHOD(backend_t, get_peer_cfg_by_name, peer_cfg_t*,
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private_uci_config_t *this, char *name)
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{
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enumerator_t *enumerator;
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peer_cfg_t *current, *found = NULL;
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enumerator = create_peer_cfg_enumerator(this, NULL, NULL);
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if (enumerator)
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{
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while (enumerator->enumerate(enumerator, ¤t))
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{
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if (streq(name, current->get_name(current)))
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{
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found = current->get_ref(current);
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break;
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}
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}
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enumerator->destroy(enumerator);
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}
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return found;
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}
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METHOD(uci_config_t, destroy, void,
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private_uci_config_t *this)
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{
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free(this);
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}
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/**
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* Described in header.
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*/
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uci_config_t *uci_config_create(uci_parser_t *parser)
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{
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private_uci_config_t *this;
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INIT(this,
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.public = {
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.backend = {
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.create_peer_cfg_enumerator = _create_peer_cfg_enumerator,
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.create_ike_cfg_enumerator = _create_ike_cfg_enumerator,
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.get_peer_cfg_by_name = _get_peer_cfg_by_name,
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},
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.destroy = _destroy,
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},
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.parser = parser,
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);
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return &this->public;
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}
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