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 METHOD(backend_t, get_peer_cfg_by_name, peer_cfg_t*,
  92         private_medcli_config_t *this, char *name)
  93 {
  94         enumerator_t *e;
  95         peer_cfg_t *peer_cfg, *med_cfg;
  96         auth_cfg_t *auth;
  97         ike_cfg_t *ike_cfg;
  98         child_cfg_t *child_cfg;
  99         chunk_t me, other;
 100         char *address, *local_net, *remote_net;
 101         lifetime_cfg_t lifetime = {
 102                 .time = {
 103                         .life = this->rekey * 60 + this->rekey,
 104                         .rekey = this->rekey,
 105                         .jitter = this->rekey
 106                 }
 107         };
 108
 109         /* query mediation server config:
 110          * - build ike_cfg/peer_cfg for mediation connection on-the-fly
 111          */
 112         e = this->db->query(this->db,
 113                         "SELECT Address, ClientConfig.KeyId, MediationServerConfig.KeyId "
 114                         "FROM MediationServerConfig JOIN ClientConfig",
 115                         DB_TEXT, DB_BLOB, DB_BLOB);
 116         if (!e || !e->enumerate(e, &address, &me, &other))
 117         {
 118                 DESTROY_IF(e);
 119                 return NULL;
 120         }
 121         ike_cfg = ike_cfg_create(FALSE, FALSE,
 122                                                          "0.0.0.0", FALSE, charon->socket->get_port(charon->socket, FALSE),
 123                                                          address, FALSE, IKEV2_UDP_PORT);
 124         ike_cfg->add_proposal(ike_cfg, proposal_create_default(PROTO_IKE));
 125         med_cfg = peer_cfg_create(
 126                 "mediation", IKEV2, ike_cfg,
 127                 CERT_NEVER_SEND, UNIQUE_REPLACE,
 128                 1, this->rekey*60, 0,                   /* keytries, rekey, reauth */
 129                 this->rekey*5, this->rekey*3,   /* jitter, overtime */
 130                 TRUE, FALSE,                                    /* mobike, aggressive */
 131                 this->dpd, 0,                                   /* DPD delay, timeout */
 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, IKEV2, 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, FALSE,                                    /* mobike, aggressive */
 169                 this->dpd, 0,                                   /* DPD delay, timeout */
 170                 NULL, NULL,                                             /* vip, pool */
 171                 FALSE, med_cfg,                                 /* mediation, med by */
 172                 identification_create_from_encoding(ID_KEY_ID, other));
 173
 174         auth = auth_cfg_create();
 175         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 176         auth->add(auth, AUTH_RULE_IDENTITY,
 177                           identification_create_from_encoding(ID_KEY_ID, me));
 178         peer_cfg->add_auth_cfg(peer_cfg, auth, TRUE);
 179         auth = auth_cfg_create();
 180         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 181         auth->add(auth, AUTH_RULE_IDENTITY,
 182                           identification_create_from_encoding(ID_KEY_ID, other));
 183         peer_cfg->add_auth_cfg(peer_cfg, auth, FALSE);
 184
 185         child_cfg = child_cfg_create(name, &lifetime, NULL, TRUE, MODE_TUNNEL,
 186                                                                  ACTION_NONE, ACTION_NONE, ACTION_NONE, FALSE,
 187                                                                  0, 0, NULL, NULL, 0);
 188         child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
 189         child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
 190         child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
 191         peer_cfg->add_child_cfg(peer_cfg, child_cfg);
 192         e->destroy(e);
 193         return peer_cfg;
 194 }
 195
 196 METHOD(backend_t, create_ike_cfg_enumerator, enumerator_t*,
 197         private_medcli_config_t *this, host_t *me, host_t *other)
 198 {
 199         return enumerator_create_single(this->ike, NULL);
 200 }
 201
 202 typedef struct {
 203         /** implements enumerator */
 204         enumerator_t public;
 205         /** inner SQL enumerator */
 206         enumerator_t *inner;
 207         /** currently enumerated peer config */
 208         peer_cfg_t *current;
 209         /** ike cfg to use in peer cfg */
 210         ike_cfg_t *ike;
 211         /** rekey time */
 212         int rekey;
 213         /** dpd time */
 214         int dpd;
 215 } peer_enumerator_t;
 216
 217 METHOD(enumerator_t, peer_enumerator_enumerate, bool,
 218         peer_enumerator_t *this, peer_cfg_t **cfg)
 219 {
 220         char *name, *local_net, *remote_net;
 221         chunk_t me, other;
 222         child_cfg_t *child_cfg;
 223         auth_cfg_t *auth;
 224         lifetime_cfg_t lifetime = {
 225                 .time = {
 226                         .life = this->rekey * 60 + this->rekey,
 227                         .rekey = this->rekey,
 228                         .jitter = this->rekey
 229                 }
 230         };
 231
 232         DESTROY_IF(this->current);
 233         if (!this->inner->enumerate(this->inner, &name, &me, &other,
 234                                                                 &local_net, &remote_net))
 235         {
 236                 this->current = NULL;
 237                 return FALSE;
 238         }
 239         this->current = peer_cfg_create(
 240                                 name, IKEV2, this->ike->get_ref(this->ike),
 241                                 CERT_NEVER_SEND, UNIQUE_REPLACE,
 242                                 1, this->rekey*60, 0,                   /* keytries, rekey, reauth */
 243                                 this->rekey*5, this->rekey*3,   /* jitter, overtime */
 244                                 TRUE, FALSE,                                    /* mobike, aggressive */
 245                                 this->dpd, 0,                                   /* DPD delay, timeout */
 246                                 NULL, NULL,                                             /* vip, pool */
 247                                 FALSE, NULL, NULL);                             /* mediation, med by, peer id */
 248
 249         auth = auth_cfg_create();
 250         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 251         auth->add(auth, AUTH_RULE_IDENTITY,
 252                           identification_create_from_encoding(ID_KEY_ID, me));
 253         this->current->add_auth_cfg(this->current, auth, TRUE);
 254         auth = auth_cfg_create();
 255         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 256         auth->add(auth, AUTH_RULE_IDENTITY,
 257                           identification_create_from_encoding(ID_KEY_ID, other));
 258         this->current->add_auth_cfg(this->current, auth, FALSE);
 259
 260         child_cfg = child_cfg_create(name, &lifetime, NULL, TRUE, MODE_TUNNEL,
 261                                                                  ACTION_NONE, ACTION_NONE, ACTION_NONE, FALSE,
 262                                                                  0, 0, NULL, NULL, 0);
 263         child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
 264         child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
 265         child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
 266         this->current->add_child_cfg(this->current, child_cfg);
 267         *cfg = this->current;
 268         return TRUE;
 269 }
 270
 271 METHOD(enumerator_t, peer_enumerator_destroy, void,
 272         peer_enumerator_t *this)
 273 {
 274         DESTROY_IF(this->current);
 275         this->inner->destroy(this->inner);
 276         free(this);
 277 }
 278
 279 METHOD(backend_t, create_peer_cfg_enumerator, enumerator_t*,
 280         private_medcli_config_t *this, identification_t *me,
 281         identification_t *other)
 282 {
 283         peer_enumerator_t *e;
 284
 285         INIT(e,
 286                 .public = {
 287                         .enumerate = (void*)_peer_enumerator_enumerate,
 288                         .destroy = _peer_enumerator_destroy,
 289                 },
 290                 .ike = this->ike,
 291                 .rekey = this->rekey,
 292                 .dpd = this->dpd,
 293         );
 294
 295         /* filter on IDs: NULL or ANY or matching KEY_ID */
 296         e->inner = this->db->query(this->db,
 297                         "SELECT Alias, ClientConfig.KeyId, Connection.KeyId, "
 298                         "Connection.LocalSubnet, Connection.RemoteSubnet "
 299                         "FROM ClientConfig JOIN Connection "
 300                         "WHERE Active AND "
 301                         "(? OR ClientConfig.KeyId = ?) AND (? OR Connection.KeyId = ?)",
 302                         DB_INT, me == NULL || me->get_type(me) == ID_ANY,
 303                         DB_BLOB, me && me->get_type(me) == ID_KEY_ID ?
 304                                 me->get_encoding(me) : chunk_empty,
 305                         DB_INT, other == NULL || other->get_type(other) == ID_ANY,
 306                         DB_BLOB, other && other->get_type(other) == ID_KEY_ID ?
 307                                 other->get_encoding(other) : chunk_empty,
 308                         DB_TEXT, DB_BLOB, DB_BLOB, DB_TEXT, DB_TEXT);
 309         if (!e->inner)
 310         {
 311                 free(e);
 312                 return NULL;
 313         }
 314         return &e->public;
 315 }
 316
 317 /**
 318  * initiate a peer config
 319  */
 320 static job_requeue_t initiate_config(peer_cfg_t *peer_cfg)
 321 {
 322         enumerator_t *enumerator;
 323         child_cfg_t *child_cfg = NULL;;
 324
 325         enumerator = peer_cfg->create_child_cfg_enumerator(peer_cfg);
 326         enumerator->enumerate(enumerator, &child_cfg);
 327         if (child_cfg)
 328         {
 329                 child_cfg->get_ref(child_cfg);
 330                 peer_cfg->get_ref(peer_cfg);
 331                 enumerator->destroy(enumerator);
 332                 charon->controller->initiate(charon->controller,
 333                                                                          peer_cfg, child_cfg, NULL, NULL, 0);
 334         }
 335         else
 336         {
 337                 enumerator->destroy(enumerator);
 338         }
 339         return JOB_REQUEUE_NONE;
 340 }
 341
 342 /**
 343  * schedule initiation of all "active" connections
 344  */
 345 static void schedule_autoinit(private_medcli_config_t *this)
 346 {
 347         enumerator_t *e;
 348         char *name;
 349
 350         e = this->db->query(this->db, "SELECT Alias FROM Connection WHERE Active",
 351                                                 DB_TEXT);
 352         if (e)
 353         {
 354                 while (e->enumerate(e, &name))
 355                 {
 356                         peer_cfg_t *peer_cfg;
 357
 358                         peer_cfg = get_peer_cfg_by_name(this, name);
 359                         if (peer_cfg)
 360                         {
 361                                 /* schedule asynchronous initiation job */
 362                                 lib->processor->queue_job(lib->processor,
 363                                                 (job_t*)callback_job_create(
 364                                                                         (callback_job_cb_t)initiate_config,
 365                                                                         peer_cfg, (void*)peer_cfg->destroy, NULL));
 366                         }
 367                 }
 368                 e->destroy(e);
 369         }
 370 }
 371
 372 METHOD(medcli_config_t, destroy, void,
 373         private_medcli_config_t *this)
 374 {
 375         this->ike->destroy(this->ike);
 376         free(this);
 377 }
 378
 379 /**
 380  * Described in header.
 381  */
 382 medcli_config_t *medcli_config_create(database_t *db)
 383 {
 384         private_medcli_config_t *this;
 385
 386         INIT(this,
 387                 .public = {
 388                         .backend = {
 389                                 .create_peer_cfg_enumerator = _create_peer_cfg_enumerator,
 390                                 .create_ike_cfg_enumerator = _create_ike_cfg_enumerator,
 391                                 .get_peer_cfg_by_name = _get_peer_cfg_by_name,
 392                         },
 393                         .destroy = _destroy,
 394                 },
 395                 .db = db,
 396                 .rekey = lib->settings->get_time(lib->settings, "medcli.rekey", 1200),
 397                 .dpd = lib->settings->get_time(lib->settings, "medcli.dpd", 300),
 398                 .ike = ike_cfg_create(FALSE, FALSE,
 399                                                           "0.0.0.0", FALSE, charon->socket->get_port(charon->socket, FALSE),
 400                                                           "0.0.0.0", FALSE, IKEV2_UDP_PORT),
 401         );
 402         this->ike->add_proposal(this->ike, proposal_create_default(PROTO_IKE));
 403
 404         schedule_autoinit(this);
 405
 406         return &this->public;
 407 }
 408