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