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", IKEV2_UDP_PORT, address, IKEV2_UDP_PORT);
 123         ike_cfg->add_proposal(ike_cfg, proposal_create_default(PROTO_IKE));
 124         med_cfg = peer_cfg_create(
 125                 "mediation", IKEV2, ike_cfg,
 126                 CERT_NEVER_SEND, UNIQUE_REPLACE,
 127                 1, this->rekey*60, 0,                   /* keytries, rekey, reauth */
 128                 this->rekey*5, this->rekey*3,   /* jitter, overtime */
 129                 TRUE, FALSE,                                    /* mobike, aggressive */
 130                 this->dpd, 0,                                   /* DPD delay, timeout */
 131                 NULL, NULL,                                             /* vip, pool */
 132                 TRUE, NULL, NULL);                              /* mediation, med by, peer id */
 133         e->destroy(e);
 134
 135         auth = auth_cfg_create();
 136         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 137         auth->add(auth, AUTH_RULE_IDENTITY,
 138                           identification_create_from_encoding(ID_KEY_ID, me));
 139         med_cfg->add_auth_cfg(med_cfg, auth, TRUE);
 140         auth = auth_cfg_create();
 141         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 142         auth->add(auth, AUTH_RULE_IDENTITY,
 143                           identification_create_from_encoding(ID_KEY_ID, other));
 144         med_cfg->add_auth_cfg(med_cfg, auth, FALSE);
 145
 146         /* query mediated config:
 147          * - use any-any ike_cfg
 148          * - build peer_cfg on-the-fly using med_cfg
 149          * - add a child_cfg
 150          */
 151         e = this->db->query(this->db,
 152                         "SELECT ClientConfig.KeyId, Connection.KeyId, "
 153                         "Connection.LocalSubnet, Connection.RemoteSubnet "
 154                         "FROM ClientConfig JOIN Connection "
 155                         "WHERE Active AND Alias = ?", DB_TEXT, name,
 156                         DB_BLOB, DB_BLOB, DB_TEXT, DB_TEXT);
 157         if (!e || !e->enumerate(e, &me, &other, &local_net, &remote_net))
 158         {
 159                 DESTROY_IF(e);
 160                 return NULL;
 161         }
 162         peer_cfg = peer_cfg_create(
 163                 name, IKEV2, this->ike->get_ref(this->ike),
 164                 CERT_NEVER_SEND, UNIQUE_REPLACE,
 165                 1, this->rekey*60, 0,                   /* keytries, rekey, reauth */
 166                 this->rekey*5, this->rekey*3,   /* jitter, overtime */
 167                 TRUE, FALSE,                                    /* mobike, aggressive */
 168                 this->dpd, 0,                                   /* DPD delay, timeout */
 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, MODE_TUNNEL,
 185                                                                  ACTION_NONE, ACTION_NONE, ACTION_NONE, FALSE,
 186                                                                  0, 0, NULL, NULL, 0);
 187         child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
 188         child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
 189         child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
 190         peer_cfg->add_child_cfg(peer_cfg, child_cfg);
 191         e->destroy(e);
 192         return peer_cfg;
 193 }
 194
 195 METHOD(backend_t, create_ike_cfg_enumerator, enumerator_t*,
 196         private_medcli_config_t *this, host_t *me, host_t *other)
 197 {
 198         return enumerator_create_single(this->ike, NULL);
 199 }
 200
 201 typedef struct {
 202         /** implements enumerator */
 203         enumerator_t public;
 204         /** inner SQL enumerator */
 205         enumerator_t *inner;
 206         /** currently enumerated peer config */
 207         peer_cfg_t *current;
 208         /** ike cfg to use in peer cfg */
 209         ike_cfg_t *ike;
 210         /** rekey time */
 211         int rekey;
 212         /** dpd time */
 213         int dpd;
 214 } peer_enumerator_t;
 215
 216 METHOD(enumerator_t, peer_enumerator_enumerate, bool,
 217         peer_enumerator_t *this, peer_cfg_t **cfg)
 218 {
 219         char *name, *local_net, *remote_net;
 220         chunk_t me, other;
 221         child_cfg_t *child_cfg;
 222         auth_cfg_t *auth;
 223         lifetime_cfg_t lifetime = {
 224                 .time = {
 225                         .life = this->rekey * 60 + this->rekey,
 226                         .rekey = this->rekey,
 227                         .jitter = this->rekey
 228                 }
 229         };
 230
 231         DESTROY_IF(this->current);
 232         if (!this->inner->enumerate(this->inner, &name, &me, &other,
 233                                                                 &local_net, &remote_net))
 234         {
 235                 this->current = NULL;
 236                 return FALSE;
 237         }
 238         this->current = peer_cfg_create(
 239                                 name, IKEV2, this->ike->get_ref(this->ike),
 240                                 CERT_NEVER_SEND, UNIQUE_REPLACE,
 241                                 1, this->rekey*60, 0,                   /* keytries, rekey, reauth */
 242                                 this->rekey*5, this->rekey*3,   /* jitter, overtime */
 243                                 TRUE, FALSE,                                    /* mobike, aggressive */
 244                                 this->dpd, 0,                                   /* DPD delay, timeout */
 245                                 NULL, NULL,                                             /* vip, pool */
 246                                 FALSE, NULL, NULL);                             /* mediation, med by, peer id */
 247
 248         auth = auth_cfg_create();
 249         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 250         auth->add(auth, AUTH_RULE_IDENTITY,
 251                           identification_create_from_encoding(ID_KEY_ID, me));
 252         this->current->add_auth_cfg(this->current, auth, TRUE);
 253         auth = auth_cfg_create();
 254         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 255         auth->add(auth, AUTH_RULE_IDENTITY,
 256                           identification_create_from_encoding(ID_KEY_ID, other));
 257         this->current->add_auth_cfg(this->current, auth, FALSE);
 258
 259         child_cfg = child_cfg_create(name, &lifetime, NULL, TRUE, MODE_TUNNEL,
 260                                                                  ACTION_NONE, ACTION_NONE, ACTION_NONE, FALSE,
 261                                                                  0, 0, NULL, NULL, 0);
 262         child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
 263         child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
 264         child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
 265         this->current->add_child_cfg(this->current, child_cfg);
 266         *cfg = this->current;
 267         return TRUE;
 268 }
 269
 270 METHOD(enumerator_t, peer_enumerator_destroy, void,
 271         peer_enumerator_t *this)
 272 {
 273         DESTROY_IF(this->current);
 274         this->inner->destroy(this->inner);
 275         free(this);
 276 }
 277
 278 METHOD(backend_t, create_peer_cfg_enumerator, enumerator_t*,
 279         private_medcli_config_t *this, identification_t *me,
 280         identification_t *other)
 281 {
 282         peer_enumerator_t *e;
 283
 284         INIT(e,
 285                 .public = {
 286                         .enumerate = (void*)_peer_enumerator_enumerate,
 287                         .destroy = _peer_enumerator_destroy,
 288                 },
 289                 .ike = this->ike,
 290                 .rekey = this->rekey,
 291                 .dpd = this->dpd,
 292         );
 293
 294         /* filter on IDs: NULL or ANY or matching KEY_ID */
 295         e->inner = this->db->query(this->db,
 296                         "SELECT Alias, ClientConfig.KeyId, Connection.KeyId, "
 297                         "Connection.LocalSubnet, Connection.RemoteSubnet "
 298                         "FROM ClientConfig JOIN Connection "
 299                         "WHERE Active AND "
 300                         "(? OR ClientConfig.KeyId = ?) AND (? OR Connection.KeyId = ?)",
 301                         DB_INT, me == NULL || me->get_type(me) == ID_ANY,
 302                         DB_BLOB, me && me->get_type(me) == ID_KEY_ID ?
 303                                 me->get_encoding(me) : chunk_empty,
 304                         DB_INT, other == NULL || other->get_type(other) == ID_ANY,
 305                         DB_BLOB, other && other->get_type(other) == ID_KEY_ID ?
 306                                 other->get_encoding(other) : chunk_empty,
 307                         DB_TEXT, DB_BLOB, DB_BLOB, DB_TEXT, DB_TEXT);
 308         if (!e->inner)
 309         {
 310                 free(e);
 311                 return NULL;
 312         }
 313         return &e->public;
 314 }
 315
 316 /**
 317  * initiate a peer config
 318  */
 319 static job_requeue_t initiate_config(peer_cfg_t *peer_cfg)
 320 {
 321         enumerator_t *enumerator;
 322         child_cfg_t *child_cfg = NULL;;
 323
 324         enumerator = peer_cfg->create_child_cfg_enumerator(peer_cfg);
 325         enumerator->enumerate(enumerator, &child_cfg);
 326         if (child_cfg)
 327         {
 328                 child_cfg->get_ref(child_cfg);
 329                 peer_cfg->get_ref(peer_cfg);
 330                 enumerator->destroy(enumerator);
 331                 charon->controller->initiate(charon->controller,
 332                                                                          peer_cfg, child_cfg, NULL, NULL, 0);
 333         }
 334         else
 335         {
 336                 enumerator->destroy(enumerator);
 337         }
 338         return JOB_REQUEUE_NONE;
 339 }
 340
 341 /**
 342  * schedule initiation of all "active" connections
 343  */
 344 static void schedule_autoinit(private_medcli_config_t *this)
 345 {
 346         enumerator_t *e;
 347         char *name;
 348
 349         e = this->db->query(this->db, "SELECT Alias FROM Connection WHERE Active",
 350                                                 DB_TEXT);
 351         if (e)
 352         {
 353                 while (e->enumerate(e, &name))
 354                 {
 355                         peer_cfg_t *peer_cfg;
 356
 357                         peer_cfg = get_peer_cfg_by_name(this, name);
 358                         if (peer_cfg)
 359                         {
 360                                 /* schedule asynchronous initiation job */
 361                                 lib->processor->queue_job(lib->processor,
 362                                                 (job_t*)callback_job_create(
 363                                                                         (callback_job_cb_t)initiate_config,
 364                                                                         peer_cfg, (void*)peer_cfg->destroy, NULL));
 365                         }
 366                 }
 367                 e->destroy(e);
 368         }
 369 }
 370
 371 METHOD(medcli_config_t, destroy, void,
 372         private_medcli_config_t *this)
 373 {
 374         this->ike->destroy(this->ike);
 375         free(this);
 376 }
 377
 378 /**
 379  * Described in header.
 380  */
 381 medcli_config_t *medcli_config_create(database_t *db)
 382 {
 383         private_medcli_config_t *this;
 384
 385         INIT(this,
 386                 .public = {
 387                         .backend = {
 388                                 .create_peer_cfg_enumerator = _create_peer_cfg_enumerator,
 389                                 .create_ike_cfg_enumerator = _create_ike_cfg_enumerator,
 390                                 .get_peer_cfg_by_name = _get_peer_cfg_by_name,
 391                         },
 392                         .destroy = _destroy,
 393                 },
 394                 .db = db,
 395                 .rekey = lib->settings->get_time(lib->settings, "medcli.rekey", 1200),
 396                 .dpd = lib->settings->get_time(lib->settings, "medcli.dpd", 300),
 397                 .ike = ike_cfg_create(FALSE, FALSE, "0.0.0.0", IKEV2_UDP_PORT,
 398                                                           "0.0.0.0", IKEV2_UDP_PORT),
 399         );
 400         this->ike->add_proposal(this->ike, proposal_create_default(PROTO_IKE));
 401
 402         schedule_autoinit(this);
 403
 404         return &this->public;
 405 }
 406