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, MODE_TUNNEL,
 185                                                                  ACTION_NONE, ACTION_NONE, FALSE, 0, 0,
 186                                                                  NULL, NULL);
 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 /**
 196  * Implementation of backend_t.create_ike_cfg_enumerator.
 197  */
 198 static enumerator_t* create_ike_cfg_enumerator(private_medcli_config_t *this,
 199                                                                                            host_t *me, host_t *other)
 200 {
 201         return enumerator_create_single(this->ike, NULL);
 202 }
 203
 204 typedef struct {
 205         /** implements enumerator */
 206         enumerator_t public;
 207         /** inner SQL enumerator */
 208         enumerator_t *inner;
 209         /** currently enumerated peer config */
 210         peer_cfg_t *current;
 211         /** ike cfg to use in peer cfg */
 212         ike_cfg_t *ike;
 213         /** rekey time */
 214         int rekey;
 215         /** dpd time */
 216         int dpd;
 217 } peer_enumerator_t;
 218
 219 /**
 220  * Implementation of peer_enumerator_t.public.enumerate
 221  */
 222 static bool peer_enumerator_enumerate(peer_enumerator_t *this, peer_cfg_t **cfg)
 223 {
 224         char *name, *local_net, *remote_net;
 225         chunk_t me, other;
 226         child_cfg_t *child_cfg;
 227         auth_cfg_t *auth;
 228         lifetime_cfg_t lifetime = {
 229                 .time = {
 230                         .life = this->rekey * 60 + this->rekey,
 231                         .rekey = this->rekey,
 232                         .jitter = this->rekey
 233                 }
 234         };
 235
 236         DESTROY_IF(this->current);
 237         if (!this->inner->enumerate(this->inner, &name, &me, &other,
 238                                                                 &local_net, &remote_net))
 239         {
 240                 this->current = NULL;
 241                 return FALSE;
 242         }
 243         this->current = peer_cfg_create(
 244                                 name, 2, this->ike->get_ref(this->ike),
 245                                 CERT_NEVER_SEND, UNIQUE_REPLACE,
 246                                 1, this->rekey*60, 0,                   /* keytries, rekey, reauth */
 247                                 this->rekey*5, this->rekey*3,   /* jitter, overtime */
 248                                 TRUE, this->dpd,                                /* mobike, dpddelay */
 249                                 NULL, NULL,                                             /* vip, pool */
 250                                 FALSE, NULL, NULL);                             /* mediation, med by, peer id */
 251
 252         auth = auth_cfg_create();
 253         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 254         auth->add(auth, AUTH_RULE_IDENTITY,
 255                           identification_create_from_encoding(ID_KEY_ID, me));
 256         this->current->add_auth_cfg(this->current, auth, TRUE);
 257         auth = auth_cfg_create();
 258         auth->add(auth, AUTH_RULE_AUTH_CLASS, AUTH_CLASS_PUBKEY);
 259         auth->add(auth, AUTH_RULE_IDENTITY,
 260                           identification_create_from_encoding(ID_KEY_ID, other));
 261         this->current->add_auth_cfg(this->current, auth, FALSE);
 262
 263         child_cfg = child_cfg_create(name, &lifetime, NULL, TRUE, MODE_TUNNEL,
 264                                                                  ACTION_NONE, ACTION_NONE, FALSE, 0, 0,
 265                                                                  NULL, NULL);
 266         child_cfg->add_proposal(child_cfg, proposal_create_default(PROTO_ESP));
 267         child_cfg->add_traffic_selector(child_cfg, TRUE, ts_from_string(local_net));
 268         child_cfg->add_traffic_selector(child_cfg, FALSE, ts_from_string(remote_net));
 269         this->current->add_child_cfg(this->current, child_cfg);
 270         *cfg = this->current;
 271         return TRUE;
 272 }
 273
 274 /**
 275  * Implementation of peer_enumerator_t.public.destroy
 276  */
 277 static void peer_enumerator_destroy(peer_enumerator_t *this)
 278 {
 279         DESTROY_IF(this->current);
 280         this->inner->destroy(this->inner);
 281         free(this);
 282 }
 283
 284 /**
 285  * Implementation of backend_t.create_peer_cfg_enumerator.
 286  */
 287 static enumerator_t* create_peer_cfg_enumerator(private_medcli_config_t *this,
 288                                                                                                 identification_t *me,
 289                                                                                                 identification_t *other)
 290 {
 291         peer_enumerator_t *e = malloc_thing(peer_enumerator_t);
 292
 293         e->current = NULL;
 294         e->ike = this->ike;
 295         e->rekey = this->rekey;
 296         e->dpd = this->dpd;
 297         e->public.enumerate = (void*)peer_enumerator_enumerate;
 298         e->public.destroy = (void*)peer_enumerator_destroy;
 299
 300         /* filter on IDs: NULL or ANY or matching KEY_ID */
 301         e->inner = this->db->query(this->db,
 302                         "SELECT Alias, ClientConfig.KeyId, Connection.KeyId, "
 303                         "Connection.LocalSubnet, Connection.RemoteSubnet "
 304                         "FROM ClientConfig JOIN Connection "
 305                         "WHERE Active AND "
 306                         "(? OR ClientConfig.KeyId = ?) AND (? OR Connection.KeyId = ?)",
 307                         DB_INT, me == NULL || me->get_type(me) == ID_ANY,
 308                         DB_BLOB, me && me->get_type(me) == ID_KEY_ID ?
 309                                 me->get_encoding(me) : chunk_empty,
 310                         DB_INT, other == NULL || other->get_type(other) == ID_ANY,
 311                         DB_BLOB, other && other->get_type(other) == ID_KEY_ID ?
 312                                 other->get_encoding(other) : chunk_empty,
 313                         DB_TEXT, DB_BLOB, DB_BLOB, DB_TEXT, DB_TEXT);
 314         if (!e->inner)
 315         {
 316                 free(e);
 317                 return NULL;
 318         }
 319         return &e->public;
 320 }
 321
 322 /**
 323  * initiate a peer config
 324  */
 325 static job_requeue_t initiate_config(peer_cfg_t *peer_cfg)
 326 {
 327         enumerator_t *enumerator;
 328         child_cfg_t *child_cfg = NULL;;
 329
 330         enumerator = peer_cfg->create_child_cfg_enumerator(peer_cfg);
 331         enumerator->enumerate(enumerator, &child_cfg);
 332         if (child_cfg)
 333         {
 334                 child_cfg->get_ref(child_cfg);
 335                 peer_cfg->get_ref(peer_cfg);
 336                 enumerator->destroy(enumerator);
 337                 charon->controller->initiate(charon->controller,
 338                                                                          peer_cfg, child_cfg, NULL, NULL);
 339         }
 340         else
 341         {
 342                 enumerator->destroy(enumerator);
 343         }
 344         return JOB_REQUEUE_NONE;
 345 }
 346
 347 /**
 348  * schedule initation of all "active" connections
 349  */
 350 static void schedule_autoinit(private_medcli_config_t *this)
 351 {
 352         enumerator_t *e;
 353         char *name;
 354
 355         e = this->db->query(this->db, "SELECT Alias FROM Connection WHERE Active",
 356                                                 DB_TEXT);
 357         if (e)
 358         {
 359                 while (e->enumerate(e, &name))
 360                 {
 361                         peer_cfg_t *peer_cfg;
 362
 363                         peer_cfg = get_peer_cfg_by_name(this, name);
 364                         if (peer_cfg)
 365                         {
 366                                 /* schedule asynchronous initiation job */
 367                                 lib->processor->queue_job(lib->processor,
 368                                                 (job_t*)callback_job_create(
 369                                                                         (callback_job_cb_t)initiate_config,
 370                                                                         peer_cfg, (void*)peer_cfg->destroy, NULL));
 371                         }
 372                 }
 373                 e->destroy(e);
 374         }
 375 }
 376
 377 /**
 378  * Implementation of medcli_config_t.destroy.
 379  */
 380 static void destroy(private_medcli_config_t *this)
 381 {
 382         this->ike->destroy(this->ike);
 383         free(this);
 384 }
 385
 386 /**
 387  * Described in header.
 388  */
 389 medcli_config_t *medcli_config_create(database_t *db)
 390 {
 391         private_medcli_config_t *this = malloc_thing(private_medcli_config_t);
 392
 393         this->public.backend.create_peer_cfg_enumerator = (enumerator_t*(*)(backend_t*, identification_t *me, identification_t *other))create_peer_cfg_enumerator;
 394         this->public.backend.create_ike_cfg_enumerator = (enumerator_t*(*)(backend_t*, host_t *me, host_t *other))create_ike_cfg_enumerator;
 395         this->public.backend.get_peer_cfg_by_name = (peer_cfg_t* (*)(backend_t*,char*))get_peer_cfg_by_name;
 396         this->public.destroy = (void(*)(medcli_config_t*))destroy;
 397
 398         this->db = db;
 399         this->rekey = lib->settings->get_time(lib->settings, "medcli.rekey", 1200);
 400         this->dpd = lib->settings->get_time(lib->settings, "medcli.dpd", 300);
 401         this->ike = ike_cfg_create(FALSE, FALSE,
 402                                                 "0.0.0.0", IKEV2_UDP_PORT, "0.0.0.0", IKEV2_UDP_PORT);
 403         this->ike->add_proposal(this->ike, proposal_create_default(PROTO_IKE));
 404
 405         schedule_autoinit(this);
 406
 407         return &this->public;
 408 }
 409