vpn/plugins/openconnect.c

   1 /*
   2  *
   3  *  ConnMan VPN daemon
   4  *
   5  *  Copyright (C) 2007-2012  Intel Corporation. All rights reserved.
   6  *
   7  *  This program is free software; you can redistribute it and/or modify
   8  *  it under the terms of the GNU General Public License version 2 as
   9  *  published by the Free Software Foundation.
  10  *
  11  *  This program is distributed in the hope that it will be useful,
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  *  GNU General Public License for more details.
  15  *
  16  *  You should have received a copy of the GNU General Public License
  17  *  along with this program; if not, write to the Free Software
  18  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  */
  21
  22 #ifdef HAVE_CONFIG_H
  23 #include <config.h>
  24 #endif
  25
  26 #include <stdlib.h>
  27 #include <string.h>
  28 #include <errno.h>
  29 #include <unistd.h>
  30 #include <net/if.h>
  31
  32 #include <glib.h>
  33
  34 #define CONNMAN_API_SUBJECT_TO_CHANGE
  35 #include <connman/plugin.h>
  36 #include <connman/log.h>
  37 #include <connman/task.h>
  38 #include <connman/ipconfig.h>
  39 #include <connman/dbus.h>
  40 #include <connman/agent.h>
  41 #include <connman/setting.h>
  42 #include <connman/vpn-dbus.h>
  43
  44 #include "../vpn-provider.h"
  45 #include "../vpn-agent.h"
  46
  47 #include "vpn.h"
  48
  49 #define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
  50
  51 struct {
  52         const char *cm_opt;
  53         const char *oc_opt;
  54         char       has_value;
  55 } oc_options[] = {
  56         { "OpenConnect.NoCertCheck", "--no-cert-check", 0 },
  57 };
  58
  59 struct oc_private_data {
  60         struct connman_task *task;
  61         char *if_name;
  62         vpn_provider_connect_cb_t cb;
  63         void *user_data;
  64 };
  65
  66 static int task_append_config_data(struct vpn_provider *provider,
  67                                         struct connman_task *task)
  68 {
  69         const char *option;
  70         int i;
  71
  72         for (i = 0; i < (int)ARRAY_SIZE(oc_options); i++) {
  73                 if (oc_options[i].oc_opt == NULL)
  74                         continue;
  75
  76                 option = vpn_provider_get_string(provider,
  77                                         oc_options[i].cm_opt);
  78                 if (option == NULL)
  79                         continue;
  80
  81                 if (connman_task_add_argument(task,
  82                                 oc_options[i].oc_opt,
  83                                 oc_options[i].has_value ? option : NULL) < 0)
  84                         return -EIO;
  85         }
  86
  87         return 0;
  88 }
  89
  90 static int oc_notify(DBusMessage *msg, struct vpn_provider *provider)
  91 {
  92         DBusMessageIter iter, dict;
  93         const char *reason, *key, *value;
  94         char *domain = NULL;
  95         char *addressv4 = NULL, *addressv6 = NULL;
  96         char *netmask = NULL, *gateway = NULL;
  97         unsigned char prefix_len = 0;
  98         struct connman_ipaddress *ipaddress;
  99
 100         dbus_message_iter_init(msg, &iter);
 101
 102         dbus_message_iter_get_basic(&iter, &reason);
 103         dbus_message_iter_next(&iter);
 104
 105         if (!provider) {
 106                 connman_error("No provider found");
 107                 return VPN_STATE_FAILURE;
 108         }
 109
 110         if (strcmp(reason, "connect"))
 111                 return VPN_STATE_DISCONNECT;
 112
 113         domain = g_strdup(vpn_provider_get_string(provider, "VPN.Domain"));
 114
 115         dbus_message_iter_recurse(&iter, &dict);
 116
 117         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 118                 DBusMessageIter entry;
 119
 120                 dbus_message_iter_recurse(&dict, &entry);
 121                 dbus_message_iter_get_basic(&entry, &key);
 122                 dbus_message_iter_next(&entry);
 123                 dbus_message_iter_get_basic(&entry, &value);
 124
 125                 if (strcmp(key, "CISCO_CSTP_OPTIONS"))
 126                         DBG("%s = %s", key, value);
 127
 128                 if (!strcmp(key, "VPNGATEWAY"))
 129                         gateway = g_strdup(value);
 130
 131                 if (!strcmp(key, "INTERNAL_IP4_ADDRESS"))
 132                         addressv4 = g_strdup(value);
 133
 134                 if (!strcmp(key, "INTERNAL_IP6_ADDRESS")) {
 135                         addressv6 = g_strdup(value);
 136                         prefix_len = 128;
 137                 }
 138
 139                 if (!strcmp(key, "INTERNAL_IP4_NETMASK"))
 140                         netmask = g_strdup(value);
 141
 142                 if (!strcmp(key, "INTERNAL_IP6_NETMASK")) {
 143                         char *sep;
 144
 145                         /* The netmask contains the address and the prefix */
 146                         sep = strchr(value, '/');
 147                         if (sep != NULL) {
 148                                 unsigned char ip_len = sep - value;
 149
 150                                 addressv6 = g_strndup(value, ip_len);
 151                                 prefix_len = (unsigned char)
 152                                                 strtol(sep + 1, NULL, 10);
 153                         }
 154                 }
 155
 156                 if (!strcmp(key, "INTERNAL_IP4_DNS") ||
 157                                 !strcmp(key, "INTERNAL_IP6_DNS"))
 158                         vpn_provider_set_nameservers(provider, value);
 159
 160                 if (!strcmp(key, "CISCO_PROXY_PAC"))
 161                         vpn_provider_set_pac(provider, value);
 162
 163                 if (domain == NULL && !strcmp(key, "CISCO_DEF_DOMAIN")) {
 164                         g_free(domain);
 165                         domain = g_strdup(value);
 166                 }
 167
 168                 if (g_str_has_prefix(key, "CISCO_SPLIT_INC") == TRUE ||
 169                         g_str_has_prefix(key, "CISCO_IPV6_SPLIT_INC") == TRUE)
 170                         vpn_provider_append_route(provider, key, value);
 171
 172                 dbus_message_iter_next(&dict);
 173         }
 174
 175         DBG("%p %p", addressv4, addressv6);
 176
 177         if (addressv4 != NULL)
 178                 ipaddress = connman_ipaddress_alloc(AF_INET);
 179         else if (addressv6 != NULL)
 180                 ipaddress = connman_ipaddress_alloc(AF_INET6);
 181         else
 182                 ipaddress = NULL;
 183
 184         if (ipaddress == NULL) {
 185                 g_free(addressv4);
 186                 g_free(addressv6);
 187                 g_free(netmask);
 188                 g_free(gateway);
 189                 g_free(domain);
 190
 191                 return VPN_STATE_FAILURE;
 192         }
 193
 194         if (addressv4 != NULL)
 195                 connman_ipaddress_set_ipv4(ipaddress, addressv4,
 196                                                 netmask, gateway);
 197         else
 198                 connman_ipaddress_set_ipv6(ipaddress, addressv6,
 199                                                 prefix_len, gateway);
 200         vpn_provider_set_ipaddress(provider, ipaddress);
 201         vpn_provider_set_domain(provider, domain);
 202
 203         g_free(addressv4);
 204         g_free(addressv6);
 205         g_free(netmask);
 206         g_free(gateway);
 207         g_free(domain);
 208         connman_ipaddress_free(ipaddress);
 209
 210         return VPN_STATE_CONNECT;
 211 }
 212
 213 static void request_input_append_cookie(DBusMessageIter *iter,
 214                                                         void *user_data)
 215 {
 216         char *str = "string";
 217
 218         connman_dbus_dict_append_basic(iter, "Type",
 219                                 DBUS_TYPE_STRING, &str);
 220         str = "mandatory";
 221         connman_dbus_dict_append_basic(iter, "Requirement",
 222                                 DBUS_TYPE_STRING, &str);
 223 }
 224
 225 struct request_input_reply {
 226         struct vpn_provider *provider;
 227         vpn_provider_auth_cb_t callback;
 228         void *user_data;
 229 };
 230
 231 static void request_input_cookie_reply(DBusMessage *reply, void *user_data)
 232 {
 233         struct request_input_reply *cookie_reply = user_data;
 234         const char *error = NULL;
 235         char *cookie = NULL;
 236         char *key;
 237         DBusMessageIter iter, dict;
 238
 239         DBG("provider %p", cookie_reply->provider);
 240
 241         if (dbus_message_get_type(reply) == DBUS_MESSAGE_TYPE_ERROR) {
 242                 error = dbus_message_get_error_name(reply);
 243                 goto done;
 244         }
 245
 246         if (vpn_agent_check_reply_has_dict(reply) == FALSE)
 247                 goto done;
 248
 249         dbus_message_iter_init(reply, &iter);
 250         dbus_message_iter_recurse(&iter, &dict);
 251         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 252                 DBusMessageIter entry, value;
 253
 254                 dbus_message_iter_recurse(&dict, &entry);
 255                 if (dbus_message_iter_get_arg_type(&entry) != DBUS_TYPE_STRING)
 256                         break;
 257
 258                 dbus_message_iter_get_basic(&entry, &key);
 259
 260                 if (g_str_equal(key, "OpenConnect.Cookie")) {
 261                         dbus_message_iter_next(&entry);
 262                         if (dbus_message_iter_get_arg_type(&entry)
 263                                                         != DBUS_TYPE_VARIANT)
 264                                 break;
 265                         dbus_message_iter_recurse(&entry, &value);
 266                         if (dbus_message_iter_get_arg_type(&value)
 267                                                         != DBUS_TYPE_STRING)
 268                                 break;
 269                         dbus_message_iter_get_basic(&value, &cookie);
 270                 }
 271
 272                 dbus_message_iter_next(&dict);
 273         }
 274
 275 done:
 276         cookie_reply->callback(cookie_reply->provider, cookie, error,
 277                                 cookie_reply->user_data);
 278         g_free(cookie_reply);
 279 }
 280
 281 typedef void (* request_cb_t)(struct vpn_provider *provider,
 282                                         const char *vpncookie,
 283                                         const char *error, void *user_data);
 284
 285 static int request_cookie_input(struct vpn_provider *provider,
 286                                 request_cb_t callback, void *user_data)
 287 {
 288         DBusMessage *message;
 289         const char *path, *agent_sender, *agent_path;
 290         DBusMessageIter iter;
 291         DBusMessageIter dict;
 292         struct request_input_reply *cookie_reply;
 293         int err;
 294
 295         connman_agent_get_info(&agent_sender, &agent_path);
 296
 297         if (provider == NULL || agent_path == NULL || callback == NULL)
 298                 return -ESRCH;
 299
 300         message = dbus_message_new_method_call(agent_sender, agent_path,
 301                                         VPN_AGENT_INTERFACE,
 302                                         "RequestInput");
 303         if (message == NULL)
 304                 return -ENOMEM;
 305
 306         dbus_message_iter_init_append(message, &iter);
 307
 308         path = vpn_provider_get_path(provider);
 309         dbus_message_iter_append_basic(&iter,
 310                                 DBUS_TYPE_OBJECT_PATH, &path);
 311
 312         connman_dbus_dict_open(&iter, &dict);
 313
 314         connman_dbus_dict_append_dict(&dict, "OpenConnect.Cookie",
 315                         request_input_append_cookie, provider);
 316
 317         vpn_agent_append_host_and_name(&dict, provider);
 318
 319         connman_dbus_dict_close(&iter, &dict);
 320
 321         cookie_reply = g_try_new0(struct request_input_reply, 1);
 322         if (cookie_reply == NULL) {
 323                 dbus_message_unref(message);
 324                 return -ENOMEM;
 325         }
 326
 327         cookie_reply->provider = provider;
 328         cookie_reply->callback = callback;
 329         cookie_reply->user_data = user_data;
 330
 331         err = connman_agent_queue_message(provider, message,
 332                         connman_timeout_input_request(),
 333                         request_input_cookie_reply, cookie_reply);
 334         if (err < 0 && err != -EBUSY) {
 335                 DBG("error %d sending agent request", err);
 336                 dbus_message_unref(message);
 337                 g_free(cookie_reply);
 338                 return err;
 339         }
 340
 341         dbus_message_unref(message);
 342
 343         return -EINPROGRESS;
 344 }
 345
 346 static int run_connect(struct vpn_provider *provider,
 347                         struct connman_task *task, const char *if_name,
 348                         vpn_provider_connect_cb_t cb, void *user_data,
 349                         const char *vpncookie)
 350 {
 351         const char *vpnhost, *cafile, *certsha1, *mtu;
 352         int fd, err = 0, len;
 353
 354         vpnhost = vpn_provider_get_string(provider, "Host");
 355
 356         if (vpncookie == NULL) {
 357                 DBG("Cookie missing, cannot connect!");
 358                 err = -EINVAL;
 359                 goto done;
 360         }
 361
 362         task_append_config_data(provider, task);
 363
 364         vpn_provider_set_string(provider, "OpenConnect.Cookie", vpncookie);
 365
 366         certsha1 = vpn_provider_get_string(provider,
 367                                                 "OpenConnect.ServerCert");
 368         if (certsha1)
 369                 connman_task_add_argument(task, "--servercert",
 370                                                         (char *)certsha1);
 371
 372         cafile = vpn_provider_get_string(provider, "OpenConnect.CACert");
 373         mtu = vpn_provider_get_string(provider, "VPN.MTU");
 374
 375         if (cafile)
 376                 connman_task_add_argument(task, "--cafile",
 377                                                         (char *)cafile);
 378         if (mtu)
 379                 connman_task_add_argument(task, "--mtu", (char *)mtu);
 380
 381         connman_task_add_argument(task, "--syslog", NULL);
 382         connman_task_add_argument(task, "--cookie-on-stdin", NULL);
 383
 384         connman_task_add_argument(task, "--script",
 385                                   SCRIPTDIR "/openconnect-script");
 386
 387         connman_task_add_argument(task, "--interface", if_name);
 388
 389         connman_task_add_argument(task, (char *)vpnhost, NULL);
 390
 391         err = connman_task_run(task, vpn_died, provider,
 392                                &fd, NULL, NULL);
 393         if (err < 0) {
 394                 connman_error("openconnect failed to start");
 395                 err = -EIO;
 396                 goto done;
 397         }
 398
 399         len = strlen(vpncookie);
 400         if (write(fd, vpncookie, len) != (ssize_t)len ||
 401                         write(fd, "\n", 1) != 1) {
 402                 connman_error("openconnect failed to take cookie on stdin");
 403                 err = -EIO;
 404                 goto done;
 405         }
 406
 407 done:
 408         if (cb != NULL)
 409                 cb(provider, user_data, err);
 410
 411         return err;
 412 }
 413
 414 static void free_private_data(struct oc_private_data *data)
 415 {
 416         g_free(data->if_name);
 417         g_free(data);
 418 }
 419
 420 static void request_input_cb(struct vpn_provider *provider,
 421                         const char *vpncookie,
 422                         const char *error, void *user_data)
 423 {
 424         struct oc_private_data *data = user_data;
 425
 426         if (vpncookie == NULL)
 427                 DBG("Requesting cookie failed, error %s", error);
 428         else if (error != NULL)
 429                 DBG("error %s", error);
 430
 431         run_connect(provider, data->task, data->if_name, data->cb,
 432                 data->user_data, vpncookie);
 433
 434         free_private_data(data);
 435 }
 436
 437 static int oc_connect(struct vpn_provider *provider,
 438                         struct connman_task *task, const char *if_name,
 439                         vpn_provider_connect_cb_t cb, void *user_data)
 440 {
 441         const char *vpnhost, *vpncookie;
 442         int err;
 443
 444         vpnhost = vpn_provider_get_string(provider, "Host");
 445         if (vpnhost == NULL) {
 446                 connman_error("Host not set; cannot enable VPN");
 447                 return -EINVAL;
 448         }
 449
 450         vpncookie = vpn_provider_get_string(provider, "OpenConnect.Cookie");
 451         if (vpncookie == NULL) {
 452                 struct oc_private_data *data;
 453
 454                 data = g_try_new0(struct oc_private_data, 1);
 455                 if (data == NULL)
 456                         return -ENOMEM;
 457
 458                 data->task = task;
 459                 data->if_name = g_strdup(if_name);
 460                 data->cb = cb;
 461                 data->user_data = user_data;
 462
 463                 err = request_cookie_input(provider, request_input_cb, data);
 464                 if (err != -EINPROGRESS) {
 465                         free_private_data(data);
 466                         goto done;
 467                 }
 468                 return err;
 469         }
 470
 471 done:
 472         return run_connect(provider, task, if_name, cb, user_data, vpncookie);
 473 }
 474
 475 static int oc_save(struct vpn_provider *provider, GKeyFile *keyfile)
 476 {
 477         const char *setting, *option;
 478         int i;
 479
 480         setting = vpn_provider_get_string(provider,
 481                                         "OpenConnect.ServerCert");
 482         if (setting != NULL)
 483                 g_key_file_set_string(keyfile,
 484                                 vpn_provider_get_save_group(provider),
 485                                 "OpenConnect.ServerCert", setting);
 486
 487         setting = vpn_provider_get_string(provider,
 488                                         "OpenConnect.CACert");
 489         if (setting != NULL)
 490                 g_key_file_set_string(keyfile,
 491                                 vpn_provider_get_save_group(provider),
 492                                 "OpenConnect.CACert", setting);
 493
 494         setting = vpn_provider_get_string(provider,
 495                                         "VPN.MTU");
 496         if (setting != NULL)
 497                 g_key_file_set_string(keyfile,
 498                                 vpn_provider_get_save_group(provider),
 499                                 "VPN.MTU", setting);
 500
 501         for (i = 0; i < (int)ARRAY_SIZE(oc_options); i++) {
 502                 if (strncmp(oc_options[i].cm_opt, "OpenConnect.", 12) == 0) {
 503                         option = vpn_provider_get_string(provider,
 504                                                         oc_options[i].cm_opt);
 505                         if (option == NULL)
 506                                 continue;
 507
 508                         g_key_file_set_string(keyfile,
 509                                         vpn_provider_get_save_group(provider),
 510                                         oc_options[i].cm_opt, option);
 511                 }
 512         }
 513
 514         return 0;
 515 }
 516
 517 static int oc_error_code(int exit_code)
 518 {
 519
 520         switch (exit_code) {
 521         case 1:
 522                 return VPN_PROVIDER_ERROR_CONNECT_FAILED;
 523         case 2:
 524                 return VPN_PROVIDER_ERROR_LOGIN_FAILED;
 525         default:
 526                 return VPN_PROVIDER_ERROR_UNKNOWN;
 527         }
 528 }
 529
 530 static struct vpn_driver vpn_driver = {
 531         .notify         = oc_notify,
 532         .connect        = oc_connect,
 533         .error_code     = oc_error_code,
 534         .save           = oc_save,
 535 };
 536
 537 static int openconnect_init(void)
 538 {
 539         return vpn_register("openconnect", &vpn_driver, OPENCONNECT);
 540 }
 541
 542 static void openconnect_exit(void)
 543 {
 544         vpn_unregister("openconnect");
 545 }
 546
 547 CONNMAN_PLUGIN_DEFINE(openconnect, "OpenConnect VPN plugin", VERSION,
 548         CONNMAN_PLUGIN_PRIORITY_DEFAULT, openconnect_init, openconnect_exit)