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