src/libcharon/plugins/medcli/medcli_config.c

   1 /*
   2  * Copyright (C) 2008 Martin Willi
   3  * Hochschule fuer Technik Rapperswil
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.  See <http://www.fsf.org/copyleft/gpl.txt>.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15
  16 #define _GNU_SOURCE
  17 #include <string.h>
  18
  19 #include "medcli_config.h"
  20
  21 #include <daemon.h>
  22 #include <processing/jobs/callback_job.h>
  23
  24 typedef struct private_medcli_config_t private_medcli_config_t;
  25
  26 /**
  27  * Private data of an medcli_config_t object
  28  */
  29 struct private_medcli_config_t {
  30
  31         /**
  32          * Public part
  33          */
  34         medcli_config_t public;
  35
  36         /**
  37          * database connection
  38          */
  39         database_t *db;
  40
  41         /**
  42          * rekey time
  43          */
  44         int rekey;
  45
  46         /**
  47          * dpd delay
  48          */
  49         int dpd;
  50
  51         /**
  52          * default ike config
  53          */
  54         ike_cfg_t *ike;
  55 };
  56
  57 /**
  58  * create a traffic selector from a CIDR notation string
  59  */
  60 static traffic_selector_t *ts_from_string(char *str)
  61 {
  62         if (str)
  63         {
  64                 int netbits = 32;
  65                 host_t *net;
  66                 char *pos;
  67
  68                 str = strdupa(str);
  69                 pos = strchr(str, '/');
  70                 if (pos)
  71                 {
  72                         *pos++ = '\0';
  73                         netbits = atoi(pos);
  74                 }
  75                 else
  76                 {
  77                         if (strchr(str, ':'))
  78                         {
  79                                 netbits = 128;
  80                         }
  81                 }
  82                 net = host_create_from_string(str, 0);
  83                 if (net)
  84                 {
  85                         return traffic_selector_create_from_subnet(net, netbits, 0, 0);
  86                 }
  87         }
  88         return traffic_selector_create_dynamic(0, 0, 65535);
  89 }
  90
  91 /**
  92  * implements backend_t.get_peer_cfg_by_name.
  93  */
  94 static peer_cfg_t *get_peer_cfg_by_name(private_medcli_config_t *this, char *name)
  95 {
  96         enumerator_t *e;
  97         peer_cfg_t *peer_cfg, *med_cfg;
  98         auth_cfg_t *auth;
  99         ike_cfg_t *ike_cfg;
 100         child_cfg_t *child_cfg;
 101         chunk_t me, other;
 102         char *address, *local_net, *remote_net;
 103         lifetime_cfg_t lifetime = {
 104                 .time = {
 105                         .life = this->rekey * 60 + this->rekey,
 106                         .rekey = this->rekey,
 107                         .jitter = this->rekey
 108                 }
 109         };
 110
 111         /* query mediation server config:
 112          * - build ike_cfg/peer_cfg for mediation connection on-the-fly
 113          */
 114         e = this->db->query(this->db,
 115                         "SELECT Address, ClientConfig.KeyId, MediationServerConfig.KeyId "
 116                         "FROM MediationServerConfig JOIN ClientConfig",
 117                         DB_TEXT, DB_BLOB, DB_BLOB);
 118         if (!e || !e->enumerate(e, &address, &me, &other))
 119         {
 120                 DESTROY_IF(e);
 121                 return NULL;
 122         }
 123         ike_cfg = ike_cfg_create(FALSE, FALSE,
 124                                                 "0.0.0.0", IKEV2_UDP_PORT, address, IKEV2_UDP_PORT);
 125         ike_cfg->add_proposal(ike_cfg, proposal_create_default(PROTO_IKE));
 126         med_cfg = peer_cfg_create(
 127                 "mediation", 2, ike_cfg,
 128                 CERT_NEVER_SEND, UNIQUE_REPLACE,
 129                 1, this->rekey*60, 0,                   /* keytries, rekey, reauth */
 130                 this->rekey*5, this->rekey*3,   /* jitter, overtime */
 131                 TRUE, this->dpd,                                /* mobike, dpddelay */
 132                 NULL, NULL,                                     /* vip, pool */
 133                 TRUE, NULL, NULL);                              /* mediation, med by, peer id */
 134         e->destroy(e);
 135
 136         auth = auth_cfg_create();
 137         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 138         auth->add(auth, AUTH_RULE_IDENTITY,
 139                           identification_create_from_encoding(ID_KEY_ID, me));
 140         med_cfg->add_auth_cfg(med_cfg, auth, TRUE);
 141         auth = auth_cfg_create();
 142         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 143         auth->add(auth, AUTH_RULE_IDENTITY,
 144                           identification_create_from_encoding(ID_KEY_ID, other));
 145         med_cfg->add_auth_cfg(med_cfg, auth, FALSE);
 146
 147         /* query mediated config:
 148          * - use any-any ike_cfg
 149          * - build peer_cfg on-the-fly using med_cfg
 150          * - add a child_cfg
 151          */
 152         e = this->db->query(this->db,
 153                         "SELECT ClientConfig.KeyId, Connection.KeyId, "
 154                         "Connection.LocalSubnet, Connection.RemoteSubnet "
 155                         "FROM ClientConfig JOIN Connection "
 156                         "WHERE Active AND Alias = ?", DB_TEXT, name,
 157                         DB_BLOB, DB_BLOB, DB_TEXT, DB_TEXT);
 158         if (!e || !e->enumerate(e, &me, &other, &local_net, &remote_net))
 159         {
 160                 DESTROY_IF(e);
 161                 return NULL;
 162         }
 163         peer_cfg = peer_cfg_create(
 164                 name, 2, this->ike->get_ref(this->ike),
 165                 CERT_NEVER_SEND, UNIQUE_REPLACE,
 166                 1, this->rekey*60, 0,                   /* keytries, rekey, reauth */
 167                 this->rekey*5, this->rekey*3,   /* jitter, overtime */
 168                 TRUE, this->dpd,                                /* mobike, dpddelay */
 169                 NULL, NULL,                                     /* vip, pool */
 170                 FALSE, med_cfg,                                 /* mediation, med by */
 171                 identification_create_from_encoding(ID_KEY_ID, other));
 172
 173         auth = auth_cfg_create();
 174         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 175         auth->add(auth, AUTH_RULE_IDENTITY,
 176                           identification_create_from_encoding(ID_KEY_ID, me));
 177         peer_cfg->add_auth_cfg(peer_cfg, auth, TRUE);
 178         auth = auth_cfg_create();
 179         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 180         auth->add(auth, AUTH_RULE_IDENTITY,
 181                           identification_create_from_encoding(ID_KEY_ID, other));
 182         peer_cfg->add_auth_cfg(peer_cfg, auth, FALSE);
 183
 184         child_cfg = child_cfg_create(name, &lifetime, NULL, TRUE,
 185                                                         MODE_TUNNEL, ACTION_NONE, ACTION_NONE, FALSE, 0, 0);
 186         child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
 187         child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
 188         child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
 189         peer_cfg->add_child_cfg(peer_cfg, child_cfg);
 190         e->destroy(e);
 191         return peer_cfg;
 192 }
 193
 194 /**
 195  * Implementation of backend_t.create_ike_cfg_enumerator.
 196  */
 197 static enumerator_t* create_ike_cfg_enumerator(private_medcli_config_t *this,
 198                                                                                            host_t *me, host_t *other)
 199 {
 200         return enumerator_create_single(this->ike, NULL);
 201 }
 202
 203 typedef struct {
 204         /** implements enumerator */
 205         enumerator_t public;
 206         /** inner SQL enumerator */
 207         enumerator_t *inner;
 208         /** currently enumerated peer config */
 209         peer_cfg_t *current;
 210         /** ike cfg to use in peer cfg */
 211         ike_cfg_t *ike;
 212         /** rekey time */
 213         int rekey;
 214         /** dpd time */
 215         int dpd;
 216 } peer_enumerator_t;
 217
 218 /**
 219  * Implementation of peer_enumerator_t.public.enumerate
 220  */
 221 static bool peer_enumerator_enumerate(peer_enumerator_t *this, peer_cfg_t **cfg)
 222 {
 223         char *name, *local_net, *remote_net;
 224         chunk_t me, other;
 225         child_cfg_t *child_cfg;
 226         auth_cfg_t *auth;
 227         lifetime_cfg_t lifetime = {
 228                 .time = {
 229                         .life = this->rekey * 60 + this->rekey,
 230                         .rekey = this->rekey,
 231                         .jitter = this->rekey
 232                 }
 233         };
 234
 235         DESTROY_IF(this->current);
 236         if (!this->inner->enumerate(this->inner, &name, &me, &other,
 237                                                                 &local_net, &remote_net))
 238         {
 239                 this->current = NULL;
 240                 return FALSE;
 241         }
 242         this->current = peer_cfg_create(
 243                                 name, 2, this->ike->get_ref(this->ike),
 244                                 CERT_NEVER_SEND, UNIQUE_REPLACE,
 245                                 1, this->rekey*60, 0,                   /* keytries, rekey, reauth */
 246                                 this->rekey*5, this->rekey*3,   /* jitter, overtime */
 247                                 TRUE, this->dpd,                                /* mobike, dpddelay */
 248                                 NULL, NULL,                                     /* vip, pool */
 249                                 FALSE, NULL, NULL);                     /* mediation, med by, peer id */
 250
 251         auth = auth_cfg_create();
 252         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 253         auth->add(auth, AUTH_RULE_IDENTITY,
 254                           identification_create_from_encoding(ID_KEY_ID, me));
 255         this->current->add_auth_cfg(this->current, auth, TRUE);
 256         auth = auth_cfg_create();
 257         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 258         auth->add(auth, AUTH_RULE_IDENTITY,
 259                           identification_create_from_encoding(ID_KEY_ID, other));
 260         this->current->add_auth_cfg(this->current, auth, FALSE);
 261
 262         child_cfg = child_cfg_create(name, &lifetime, NULL, TRUE, MODE_TUNNEL,
 263                                                                  ACTION_NONE, ACTION_NONE, FALSE, 0, 0);
 264         child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
 265         child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
 266         child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
 267         this->current->add_child_cfg(this->current, child_cfg);
 268         *cfg = this->current;
 269         return TRUE;
 270 }
 271
 272 /**
 273  * Implementation of peer_enumerator_t.public.destroy
 274  */
 275 static void peer_enumerator_destroy(peer_enumerator_t *this)
 276 {
 277         DESTROY_IF(this->current);
 278         this->inner->destroy(this->inner);
 279         free(this);
 280 }
 281
 282 /**
 283  * Implementation of backend_t.create_peer_cfg_enumerator.
 284  */
 285 static enumerator_t* create_peer_cfg_enumerator(private_medcli_config_t *this,
 286                                                                                                 identification_t *me,
 287                                                                                                 identification_t *other)
 288 {
 289         peer_enumerator_t *e = malloc_thing(peer_enumerator_t);
 290
 291         e->current = NULL;
 292         e->ike = this->ike;
 293         e->rekey = this->rekey;
 294         e->dpd = this->dpd;
 295         e->public.enumerate = (void*)peer_enumerator_enumerate;
 296         e->public.destroy = (void*)peer_enumerator_destroy;
 297
 298         /* filter on IDs: NULL or ANY or matching KEY_ID */
 299         e->inner = this->db->query(this->db,
 300                         "SELECT Alias, ClientConfig.KeyId, Connection.KeyId, "
 301                         "Connection.LocalSubnet, Connection.RemoteSubnet "
 302                         "FROM ClientConfig JOIN Connection "
 303                         "WHERE Active AND "
 304                         "(? OR ClientConfig.KeyId = ?) AND (? OR Connection.KeyId = ?)",
 305                         DB_INT, me == NULL || me->get_type(me) == ID_ANY,
 306                         DB_BLOB, me && me->get_type(me) == ID_KEY_ID ?
 307                                 me->get_encoding(me) : chunk_empty,
 308                         DB_INT, other == NULL || other->get_type(other) == ID_ANY,
 309                         DB_BLOB, other && other->get_type(other) == ID_KEY_ID ?
 310                                 other->get_encoding(other) : chunk_empty,
 311                         DB_TEXT, DB_BLOB, DB_BLOB, DB_TEXT, DB_TEXT);
 312         if (!e->inner)
 313         {
 314                 free(e);
 315                 return NULL;
 316         }
 317         return &e->public;
 318 }
 319
 320 /**
 321  * initiate a peer config
 322  */
 323 static job_requeue_t initiate_config(peer_cfg_t *peer_cfg)
 324 {
 325         enumerator_t *enumerator;
 326         child_cfg_t *child_cfg = NULL;;
 327
 328         enumerator = peer_cfg->create_child_cfg_enumerator(peer_cfg);
 329         enumerator->enumerate(enumerator, &child_cfg);
 330         if (child_cfg)
 331         {
 332                 child_cfg->get_ref(child_cfg);
 333                 peer_cfg->get_ref(peer_cfg);
 334                 enumerator->destroy(enumerator);
 335                 charon->controller->initiate(charon->controller,
 336                                                                          peer_cfg, child_cfg, NULL, NULL);
 337         }
 338         else
 339         {
 340                 enumerator->destroy(enumerator);
 341         }
 342         return JOB_REQUEUE_NONE;
 343 }
 344
 345 /**
 346  * schedule initation of all "active" connections
 347  */
 348 static void schedule_autoinit(private_medcli_config_t *this)
 349 {
 350         enumerator_t *e;
 351         char *name;
 352
 353         e = this->db->query(this->db, "SELECT Alias FROM Connection WHERE Active",
 354                                                 DB_TEXT);
 355         if (e)
 356         {
 357                 while (e->enumerate(e, &name))
 358                 {
 359                         peer_cfg_t *peer_cfg;
 360
 361                         peer_cfg = get_peer_cfg_by_name(this, name);
 362                         if (peer_cfg)
 363                         {
 364                                 /* schedule asynchronous initiation job */
 365                                 charon->processor->queue_job(charon->processor,
 366                                                 (job_t*)callback_job_create(
 367                                                                         (callback_job_cb_t)initiate_config,
 368                                                                         peer_cfg, (void*)peer_cfg->destroy, NULL));
 369                         }
 370                 }
 371                 e->destroy(e);
 372         }
 373 }
 374
 375 /**
 376  * Implementation of medcli_config_t.destroy.
 377  */
 378 static void destroy(private_medcli_config_t *this)
 379 {
 380         this->ike->destroy(this->ike);
 381         free(this);
 382 }
 383
 384 /**
 385  * Described in header.
 386  */
 387 medcli_config_t *medcli_config_create(database_t *db)
 388 {
 389         private_medcli_config_t *this = malloc_thing(private_medcli_config_t);
 390
 391         this->public.backend.create_peer_cfg_enumerator = (enumerator_t*(*)(backend_t*, identification_t *me, identification_t *other))create_peer_cfg_enumerator;
 392         this->public.backend.create_ike_cfg_enumerator = (enumerator_t*(*)(backend_t*, host_t *me, host_t *other))create_ike_cfg_enumerator;
 393         this->public.backend.get_peer_cfg_by_name = (peer_cfg_t* (*)(backend_t*,char*))get_peer_cfg_by_name;
 394         this->public.destroy = (void(*)(medcli_config_t*))destroy;
 395
 396         this->db = db;
 397         this->rekey = lib->settings->get_time(lib->settings, "medcli.rekey", 1200);
 398         this->dpd = lib->settings->get_time(lib->settings, "medcli.dpd", 300);
 399         this->ike = ike_cfg_create(FALSE, FALSE,
 400                                                 "0.0.0.0", IKEV2_UDP_PORT, "0.0.0.0", IKEV2_UDP_PORT);
 401         this->ike->add_proposal(this->ike, proposal_create_default(PROTO_IKE));
 402
 403         schedule_autoinit(this);
 404
 405         return &this->public;
 406 }
 407