410 lines
11 KiB
C
410 lines
11 KiB
C
/*
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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 "medcli_config.h"
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#include <daemon.h>
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#include <processing/jobs/callback_job.h>
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typedef struct private_medcli_config_t private_medcli_config_t;
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/**
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* Private data of an medcli_config_t object
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*/
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struct private_medcli_config_t {
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/**
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* Public part
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*/
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medcli_config_t public;
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/**
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* database connection
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*/
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database_t *db;
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/**
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* rekey time
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*/
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int rekey;
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/**
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* dpd delay
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*/
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int dpd;
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/**
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* default ike config
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*/
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ike_cfg_t *ike;
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};
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/**
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* create a traffic selector from a CIDR notation string
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*/
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static traffic_selector_t *ts_from_string(char *str)
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{
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if (str)
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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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str = strdupa(str);
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pos = strchr(str, '/');
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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(str, ':'))
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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(str, 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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* implements backend_t.get_peer_cfg_by_name.
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*/
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static peer_cfg_t *get_peer_cfg_by_name(private_medcli_config_t *this, char *name)
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{
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enumerator_t *e;
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peer_cfg_t *peer_cfg, *med_cfg;
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auth_cfg_t *auth;
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ike_cfg_t *ike_cfg;
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child_cfg_t *child_cfg;
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chunk_t me, other;
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char *address, *local_net, *remote_net;
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lifetime_cfg_t lifetime = {
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.time = {
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.life = this->rekey * 60 + this->rekey,
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.rekey = this->rekey,
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.jitter = this->rekey
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}
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};
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/* query mediation server config:
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* - build ike_cfg/peer_cfg for mediation connection on-the-fly
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*/
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e = this->db->query(this->db,
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"SELECT Address, ClientConfig.KeyId, MediationServerConfig.KeyId "
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"FROM MediationServerConfig JOIN ClientConfig",
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DB_TEXT, DB_BLOB, DB_BLOB);
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if (!e || !e->enumerate(e, &address, &me, &other))
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{
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DESTROY_IF(e);
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return NULL;
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}
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ike_cfg = ike_cfg_create(FALSE, FALSE,
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"0.0.0.0", IKEV2_UDP_PORT, address, IKEV2_UDP_PORT);
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ike_cfg->add_proposal(ike_cfg, proposal_create_default(PROTO_IKE));
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med_cfg = peer_cfg_create(
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"mediation", 2, ike_cfg,
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CERT_NEVER_SEND, UNIQUE_REPLACE,
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1, this->rekey*60, 0, /* keytries, rekey, reauth */
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this->rekey*5, this->rekey*3, /* jitter, overtime */
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TRUE, this->dpd, /* mobike, dpddelay */
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NULL, NULL, /* vip, pool */
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TRUE, NULL, NULL); /* mediation, med by, peer id */
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e->destroy(e);
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auth = auth_cfg_create();
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auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
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auth->add(auth, AUTH_RULE_IDENTITY,
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identification_create_from_encoding(ID_KEY_ID, me));
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med_cfg->add_auth_cfg(med_cfg, auth, TRUE);
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auth = auth_cfg_create();
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auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
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auth->add(auth, AUTH_RULE_IDENTITY,
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identification_create_from_encoding(ID_KEY_ID, other));
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med_cfg->add_auth_cfg(med_cfg, auth, FALSE);
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/* query mediated config:
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* - use any-any ike_cfg
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* - build peer_cfg on-the-fly using med_cfg
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* - add a child_cfg
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*/
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e = this->db->query(this->db,
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"SELECT ClientConfig.KeyId, Connection.KeyId, "
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"Connection.LocalSubnet, Connection.RemoteSubnet "
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"FROM ClientConfig JOIN Connection "
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"WHERE Active AND Alias = ?", DB_TEXT, name,
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DB_BLOB, DB_BLOB, DB_TEXT, DB_TEXT);
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if (!e || !e->enumerate(e, &me, &other, &local_net, &remote_net))
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{
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DESTROY_IF(e);
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return NULL;
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}
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peer_cfg = peer_cfg_create(
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name, 2, this->ike->get_ref(this->ike),
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CERT_NEVER_SEND, UNIQUE_REPLACE,
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1, this->rekey*60, 0, /* keytries, rekey, reauth */
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this->rekey*5, this->rekey*3, /* jitter, overtime */
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TRUE, this->dpd, /* mobike, dpddelay */
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NULL, NULL, /* vip, pool */
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FALSE, med_cfg, /* mediation, med by */
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identification_create_from_encoding(ID_KEY_ID, other));
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auth = auth_cfg_create();
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auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
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auth->add(auth, AUTH_RULE_IDENTITY,
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identification_create_from_encoding(ID_KEY_ID, me));
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peer_cfg->add_auth_cfg(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_PUBKEY);
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auth->add(auth, AUTH_RULE_IDENTITY,
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identification_create_from_encoding(ID_KEY_ID, other));
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peer_cfg->add_auth_cfg(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, FALSE,
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0, 0, NULL, NULL, 0);
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child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
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child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
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child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
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peer_cfg->add_child_cfg(peer_cfg, child_cfg);
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e->destroy(e);
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return peer_cfg;
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}
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/**
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* Implementation of backend_t.create_ike_cfg_enumerator.
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*/
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static enumerator_t* create_ike_cfg_enumerator(private_medcli_config_t *this,
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host_t *me, host_t *other)
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{
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return enumerator_create_single(this->ike, NULL);
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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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/** inner SQL enumerator */
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enumerator_t *inner;
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/** currently enumerated peer config */
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peer_cfg_t *current;
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/** ike cfg to use in peer cfg */
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ike_cfg_t *ike;
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/** rekey time */
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int rekey;
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/** dpd time */
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int dpd;
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} peer_enumerator_t;
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/**
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* Implementation of peer_enumerator_t.public.enumerate
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*/
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static bool peer_enumerator_enumerate(peer_enumerator_t *this, peer_cfg_t **cfg)
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{
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char *name, *local_net, *remote_net;
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chunk_t me, other;
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child_cfg_t *child_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 = this->rekey * 60 + this->rekey,
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.rekey = this->rekey,
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.jitter = this->rekey
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}
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};
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DESTROY_IF(this->current);
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if (!this->inner->enumerate(this->inner, &name, &me, &other,
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&local_net, &remote_net))
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{
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this->current = NULL;
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return FALSE;
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}
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this->current = peer_cfg_create(
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name, 2, this->ike->get_ref(this->ike),
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CERT_NEVER_SEND, UNIQUE_REPLACE,
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1, this->rekey*60, 0, /* keytries, rekey, reauth */
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this->rekey*5, this->rekey*3, /* jitter, overtime */
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TRUE, this->dpd, /* mobike, dpddelay */
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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_PUBKEY);
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auth->add(auth, AUTH_RULE_IDENTITY,
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identification_create_from_encoding(ID_KEY_ID, me));
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this->current->add_auth_cfg(this->current, auth, TRUE);
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auth = auth_cfg_create();
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auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
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auth->add(auth, AUTH_RULE_IDENTITY,
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identification_create_from_encoding(ID_KEY_ID, other));
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this->current->add_auth_cfg(this->current, 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, FALSE,
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0, 0, NULL, NULL, 0);
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child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
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child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
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child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
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this->current->add_child_cfg(this->current, child_cfg);
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*cfg = this->current;
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return TRUE;
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}
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/**
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* Implementation of peer_enumerator_t.public.destroy
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*/
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static void peer_enumerator_destroy(peer_enumerator_t *this)
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{
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DESTROY_IF(this->current);
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this->inner->destroy(this->inner);
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free(this);
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}
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/**
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* Implementation of backend_t.create_peer_cfg_enumerator.
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*/
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static enumerator_t* create_peer_cfg_enumerator(private_medcli_config_t *this,
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identification_t *me,
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identification_t *other)
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{
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peer_enumerator_t *e = malloc_thing(peer_enumerator_t);
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e->current = NULL;
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e->ike = this->ike;
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e->rekey = this->rekey;
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e->dpd = this->dpd;
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e->public.enumerate = (void*)peer_enumerator_enumerate;
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e->public.destroy = (void*)peer_enumerator_destroy;
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/* filter on IDs: NULL or ANY or matching KEY_ID */
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e->inner = this->db->query(this->db,
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"SELECT Alias, ClientConfig.KeyId, Connection.KeyId, "
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"Connection.LocalSubnet, Connection.RemoteSubnet "
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"FROM ClientConfig JOIN Connection "
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"WHERE Active AND "
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"(? OR ClientConfig.KeyId = ?) AND (? OR Connection.KeyId = ?)",
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DB_INT, me == NULL || me->get_type(me) == ID_ANY,
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DB_BLOB, me && me->get_type(me) == ID_KEY_ID ?
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me->get_encoding(me) : chunk_empty,
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DB_INT, other == NULL || other->get_type(other) == ID_ANY,
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DB_BLOB, other && other->get_type(other) == ID_KEY_ID ?
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other->get_encoding(other) : chunk_empty,
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DB_TEXT, DB_BLOB, DB_BLOB, DB_TEXT, DB_TEXT);
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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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* initiate a peer config
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*/
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static job_requeue_t initiate_config(peer_cfg_t *peer_cfg)
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{
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enumerator_t *enumerator;
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child_cfg_t *child_cfg = NULL;;
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enumerator = peer_cfg->create_child_cfg_enumerator(peer_cfg);
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enumerator->enumerate(enumerator, &child_cfg);
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if (child_cfg)
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{
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child_cfg->get_ref(child_cfg);
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peer_cfg->get_ref(peer_cfg);
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enumerator->destroy(enumerator);
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charon->controller->initiate(charon->controller,
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peer_cfg, child_cfg, NULL, NULL);
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}
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else
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{
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enumerator->destroy(enumerator);
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}
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return JOB_REQUEUE_NONE;
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}
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/**
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* schedule initiation of all "active" connections
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*/
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static void schedule_autoinit(private_medcli_config_t *this)
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{
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enumerator_t *e;
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char *name;
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e = this->db->query(this->db, "SELECT Alias FROM Connection WHERE Active",
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DB_TEXT);
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if (e)
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{
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while (e->enumerate(e, &name))
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{
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peer_cfg_t *peer_cfg;
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peer_cfg = get_peer_cfg_by_name(this, name);
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if (peer_cfg)
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{
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/* schedule asynchronous initiation job */
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lib->processor->queue_job(lib->processor,
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(job_t*)callback_job_create(
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(callback_job_cb_t)initiate_config,
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peer_cfg, (void*)peer_cfg->destroy, NULL));
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}
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}
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e->destroy(e);
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}
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}
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/**
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* Implementation of medcli_config_t.destroy.
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*/
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static void destroy(private_medcli_config_t *this)
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{
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this->ike->destroy(this->ike);
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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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medcli_config_t *medcli_config_create(database_t *db)
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{
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private_medcli_config_t *this = malloc_thing(private_medcli_config_t);
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this->public.backend.create_peer_cfg_enumerator = (enumerator_t*(*)(backend_t*, identification_t *me, identification_t *other))create_peer_cfg_enumerator;
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this->public.backend.create_ike_cfg_enumerator = (enumerator_t*(*)(backend_t*, host_t *me, host_t *other))create_ike_cfg_enumerator;
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this->public.backend.get_peer_cfg_by_name = (peer_cfg_t* (*)(backend_t*,char*))get_peer_cfg_by_name;
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this->public.destroy = (void(*)(medcli_config_t*))destroy;
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this->db = db;
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this->rekey = lib->settings->get_time(lib->settings, "medcli.rekey", 1200);
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this->dpd = lib->settings->get_time(lib->settings, "medcli.dpd", 300);
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this->ike = ike_cfg_create(FALSE, FALSE,
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"0.0.0.0", IKEV2_UDP_PORT, "0.0.0.0", IKEV2_UDP_PORT);
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this->ike->add_proposal(this->ike, proposal_create_default(PROTO_IKE));
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schedule_autoinit(this);
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return &this->public;
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}
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