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 struct oc_private_data {
  50         struct connman_task *task;
  51         char *if_name;
  52         vpn_provider_connect_cb_t cb;
  53         void *user_data;
  54 };
  55
  56 static int oc_notify(DBusMessage *msg, struct vpn_provider *provider)
  57 {
  58         DBusMessageIter iter, dict;
  59         const char *reason, *key, *value;
  60         const char *domain = NULL;
  61         char *addressv4 = NULL, *addressv6 = NULL;
  62         char *netmask = NULL, *gateway = NULL;
  63         unsigned char prefix_len = 0;
  64         struct connman_ipaddress *ipaddress;
  65
  66         dbus_message_iter_init(msg, &iter);
  67
  68         dbus_message_iter_get_basic(&iter, &reason);
  69         dbus_message_iter_next(&iter);
  70
  71         if (!provider) {
  72                 connman_error("No provider found");
  73                 return VPN_STATE_FAILURE;
  74         }
  75
  76         if (strcmp(reason, "connect"))
  77                 return VPN_STATE_DISCONNECT;
  78
  79         domain = vpn_provider_get_string(provider, "VPN.Domain");
  80
  81         dbus_message_iter_recurse(&iter, &dict);
  82
  83         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
  84                 DBusMessageIter entry;
  85
  86                 dbus_message_iter_recurse(&dict, &entry);
  87                 dbus_message_iter_get_basic(&entry, &key);
  88                 dbus_message_iter_next(&entry);
  89                 dbus_message_iter_get_basic(&entry, &value);
  90
  91                 if (strcmp(key, "CISCO_CSTP_OPTIONS"))
  92                         DBG("%s = %s", key, value);
  93
  94                 if (!strcmp(key, "VPNGATEWAY"))
  95                         gateway = g_strdup(value);
  96
  97                 if (!strcmp(key, "INTERNAL_IP4_ADDRESS"))
  98                         addressv4 = g_strdup(value);
  99
 100                 if (!strcmp(key, "INTERNAL_IP6_ADDRESS")) {
 101                         addressv6 = g_strdup(value);
 102                         prefix_len = 128;
 103                 }
 104
 105                 if (!strcmp(key, "INTERNAL_IP4_NETMASK"))
 106                         netmask = g_strdup(value);
 107
 108                 if (!strcmp(key, "INTERNAL_IP6_NETMASK")) {
 109                         char *sep;
 110
 111                         /* The netmask contains the address and the prefix */
 112                         sep = strchr(value, '/');
 113                         if (sep != NULL) {
 114                                 unsigned char ip_len = sep - value;
 115
 116                                 addressv6 = g_strndup(value, ip_len);
 117                                 prefix_len = (unsigned char)
 118                                                 strtol(sep + 1, NULL, 10);
 119                         }
 120                 }
 121
 122                 if (!strcmp(key, "INTERNAL_IP4_DNS") ||
 123                                 !strcmp(key, "INTERNAL_IP6_DNS"))
 124                         vpn_provider_set_nameservers(provider, value);
 125
 126                 if (!strcmp(key, "CISCO_PROXY_PAC"))
 127                         vpn_provider_set_pac(provider, value);
 128
 129                 if (domain == NULL && !strcmp(key, "CISCO_DEF_DOMAIN"))
 130                         domain = value;
 131
 132                 if (g_str_has_prefix(key, "CISCO_SPLIT_INC") == TRUE ||
 133                         g_str_has_prefix(key, "CISCO_IPV6_SPLIT_INC") == TRUE)
 134                         vpn_provider_append_route(provider, key, value);
 135
 136                 dbus_message_iter_next(&dict);
 137         }
 138
 139         DBG("%p %p", addressv4, addressv6);
 140
 141         if (addressv4 != NULL)
 142                 ipaddress = connman_ipaddress_alloc(AF_INET);
 143         else if (addressv6 != NULL)
 144                 ipaddress = connman_ipaddress_alloc(AF_INET6);
 145         else
 146                 ipaddress = NULL;
 147
 148         if (ipaddress == NULL) {
 149                 g_free(addressv4);
 150                 g_free(addressv6);
 151                 g_free(netmask);
 152                 g_free(gateway);
 153
 154                 return VPN_STATE_FAILURE;
 155         }
 156
 157         if (addressv4 != NULL)
 158                 connman_ipaddress_set_ipv4(ipaddress, addressv4,
 159                                                 netmask, gateway);
 160         else
 161                 connman_ipaddress_set_ipv6(ipaddress, addressv6,
 162                                                 prefix_len, gateway);
 163         vpn_provider_set_ipaddress(provider, ipaddress);
 164         vpn_provider_set_domain(provider, domain);
 165
 166         g_free(addressv4);
 167         g_free(addressv6);
 168         g_free(netmask);
 169         g_free(gateway);
 170         connman_ipaddress_free(ipaddress);
 171
 172         return VPN_STATE_CONNECT;
 173 }
 174
 175 static void request_input_append_cookie(DBusMessageIter *iter,
 176                                                         void *user_data)
 177 {
 178         char *str = "string";
 179
 180         connman_dbus_dict_append_basic(iter, "Type",
 181                                 DBUS_TYPE_STRING, &str);
 182         str = "mandatory";
 183         connman_dbus_dict_append_basic(iter, "Requirement",
 184                                 DBUS_TYPE_STRING, &str);
 185 }
 186
 187 struct request_input_reply {
 188         struct vpn_provider *provider;
 189         vpn_provider_auth_cb_t callback;
 190         void *user_data;
 191 };
 192
 193 static void request_input_cookie_reply(DBusMessage *reply, void *user_data)
 194 {
 195         struct request_input_reply *cookie_reply = user_data;
 196         const char *error = NULL;
 197         char *cookie = NULL;
 198         char *key;
 199         DBusMessageIter iter, dict;
 200
 201         DBG("provider %p", cookie_reply->provider);
 202
 203         if (dbus_message_get_type(reply) == DBUS_MESSAGE_TYPE_ERROR) {
 204                 error = dbus_message_get_error_name(reply);
 205                 goto done;
 206         }
 207
 208         if (vpn_agent_check_reply_has_dict(reply) == FALSE)
 209                 goto done;
 210
 211         dbus_message_iter_init(reply, &iter);
 212         dbus_message_iter_recurse(&iter, &dict);
 213         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 214                 DBusMessageIter entry, value;
 215
 216                 dbus_message_iter_recurse(&dict, &entry);
 217                 if (dbus_message_iter_get_arg_type(&entry) != DBUS_TYPE_STRING)
 218                         break;
 219
 220                 dbus_message_iter_get_basic(&entry, &key);
 221
 222                 if (g_str_equal(key, "OpenConnect.Cookie")) {
 223                         dbus_message_iter_next(&entry);
 224                         if (dbus_message_iter_get_arg_type(&entry)
 225                                                         != DBUS_TYPE_VARIANT)
 226                                 break;
 227                         dbus_message_iter_recurse(&entry, &value);
 228                         if (dbus_message_iter_get_arg_type(&value)
 229                                                         != DBUS_TYPE_STRING)
 230                                 break;
 231                         dbus_message_iter_get_basic(&value, &cookie);
 232                 }
 233
 234                 dbus_message_iter_next(&dict);
 235         }
 236
 237 done:
 238         cookie_reply->callback(cookie_reply->provider, cookie, error,
 239                                 cookie_reply->user_data);
 240         g_free(cookie_reply);
 241 }
 242
 243 typedef void (* request_cb_t)(struct vpn_provider *provider,
 244                                         const char *vpncookie,
 245                                         const char *error, void *user_data);
 246
 247 static int request_cookie_input(struct vpn_provider *provider,
 248                                 request_cb_t callback, void *user_data)
 249 {
 250         DBusMessage *message;
 251         const char *path, *agent_sender, *agent_path;
 252         DBusMessageIter iter;
 253         DBusMessageIter dict;
 254         struct request_input_reply *cookie_reply;
 255         int err;
 256
 257         connman_agent_get_info(&agent_sender, &agent_path);
 258
 259         if (provider == NULL || agent_path == NULL || callback == NULL)
 260                 return -ESRCH;
 261
 262         message = dbus_message_new_method_call(agent_sender, agent_path,
 263                                         VPN_AGENT_INTERFACE,
 264                                         "RequestInput");
 265         if (message == NULL)
 266                 return -ENOMEM;
 267
 268         dbus_message_iter_init_append(message, &iter);
 269
 270         path = vpn_provider_get_path(provider);
 271         dbus_message_iter_append_basic(&iter,
 272                                 DBUS_TYPE_OBJECT_PATH, &path);
 273
 274         connman_dbus_dict_open(&iter, &dict);
 275
 276         connman_dbus_dict_append_dict(&dict, "OpenConnect.Cookie",
 277                         request_input_append_cookie, provider);
 278
 279         vpn_agent_append_host_and_name(&dict, provider);
 280
 281         connman_dbus_dict_close(&iter, &dict);
 282
 283         cookie_reply = g_try_new0(struct request_input_reply, 1);
 284         if (cookie_reply == NULL) {
 285                 dbus_message_unref(message);
 286                 return -ENOMEM;
 287         }
 288
 289         cookie_reply->provider = provider;
 290         cookie_reply->callback = callback;
 291         cookie_reply->user_data = user_data;
 292
 293         err = connman_agent_queue_message(provider, message,
 294                         connman_timeout_input_request(),
 295                         request_input_cookie_reply, cookie_reply);
 296         if (err < 0 && err != -EBUSY) {
 297                 DBG("error %d sending agent request", err);
 298                 dbus_message_unref(message);
 299                 g_free(cookie_reply);
 300                 return err;
 301         }
 302
 303         dbus_message_unref(message);
 304
 305         return -EINPROGRESS;
 306 }
 307
 308 static int run_connect(struct vpn_provider *provider,
 309                         struct connman_task *task, const char *if_name,
 310                         vpn_provider_connect_cb_t cb, void *user_data,
 311                         const char *vpncookie)
 312 {
 313         const char *vpnhost, *cafile, *certsha1, *mtu;
 314         int fd, err = 0, len;
 315
 316         vpnhost = vpn_provider_get_string(provider, "Host");
 317
 318         if (vpncookie == NULL) {
 319                 DBG("Cookie missing, cannot connect!");
 320                 err = -EINVAL;
 321                 goto done;
 322         }
 323
 324         vpn_provider_set_string(provider, "OpenConnect.Cookie", vpncookie);
 325
 326         certsha1 = vpn_provider_get_string(provider,
 327                                                 "OpenConnect.ServerCert");
 328         if (certsha1)
 329                 connman_task_add_argument(task, "--servercert",
 330                                                         (char *)certsha1);
 331
 332         cafile = vpn_provider_get_string(provider, "OpenConnect.CACert");
 333         mtu = vpn_provider_get_string(provider, "VPN.MTU");
 334
 335         if (cafile)
 336                 connman_task_add_argument(task, "--cafile",
 337                                                         (char *)cafile);
 338         if (mtu)
 339                 connman_task_add_argument(task, "--mtu", (char *)mtu);
 340
 341         connman_task_add_argument(task, "--syslog", NULL);
 342         connman_task_add_argument(task, "--cookie-on-stdin", NULL);
 343
 344         connman_task_add_argument(task, "--script",
 345                                   SCRIPTDIR "/openconnect-script");
 346
 347         connman_task_add_argument(task, "--interface", if_name);
 348
 349         connman_task_add_argument(task, (char *)vpnhost, NULL);
 350
 351         err = connman_task_run(task, vpn_died, provider,
 352                                &fd, NULL, NULL);
 353         if (err < 0) {
 354                 connman_error("openconnect failed to start");
 355                 err = -EIO;
 356                 goto done;
 357         }
 358
 359         len = strlen(vpncookie);
 360         if (write(fd, vpncookie, len) != (ssize_t)len ||
 361                         write(fd, "\n", 1) != 1) {
 362                 connman_error("openconnect failed to take cookie on stdin");
 363                 err = -EIO;
 364                 goto done;
 365         }
 366
 367 done:
 368         if (cb != NULL)
 369                 cb(provider, user_data, err);
 370
 371         return err;
 372 }
 373
 374 static void free_private_data(struct oc_private_data *data)
 375 {
 376         g_free(data->if_name);
 377         g_free(data);
 378 }
 379
 380 static void request_input_cb(struct vpn_provider *provider,
 381                         const char *vpncookie,
 382                         const char *error, void *user_data)
 383 {
 384         struct oc_private_data *data = user_data;
 385
 386         if (vpncookie == NULL)
 387                 DBG("Requesting cookie failed, error %s", error);
 388         else if (error != NULL)
 389                 DBG("error %s", error);
 390
 391         run_connect(provider, data->task, data->if_name, data->cb,
 392                 data->user_data, vpncookie);
 393
 394         free_private_data(data);
 395 }
 396
 397 static int oc_connect(struct vpn_provider *provider,
 398                         struct connman_task *task, const char *if_name,
 399                         vpn_provider_connect_cb_t cb, void *user_data)
 400 {
 401         const char *vpnhost, *vpncookie;
 402         int err;
 403
 404         vpnhost = vpn_provider_get_string(provider, "Host");
 405         if (vpnhost == NULL) {
 406                 connman_error("Host not set; cannot enable VPN");
 407                 return -EINVAL;
 408         }
 409
 410         vpncookie = vpn_provider_get_string(provider, "OpenConnect.Cookie");
 411         if (vpncookie == NULL) {
 412                 struct oc_private_data *data;
 413
 414                 data = g_try_new0(struct oc_private_data, 1);
 415                 if (data == NULL)
 416                         return -ENOMEM;
 417
 418                 data->task = task;
 419                 data->if_name = g_strdup(if_name);
 420                 data->cb = cb;
 421                 data->user_data = user_data;
 422
 423                 err = request_cookie_input(provider, request_input_cb, data);
 424                 if (err != -EINPROGRESS) {
 425                         free_private_data(data);
 426                         goto done;
 427                 }
 428                 return err;
 429         }
 430
 431 done:
 432         return run_connect(provider, task, if_name, cb, user_data, vpncookie);
 433 }
 434
 435 static int oc_save(struct vpn_provider *provider, GKeyFile *keyfile)
 436 {
 437         const char *setting;
 438
 439         setting = vpn_provider_get_string(provider,
 440                                         "OpenConnect.ServerCert");
 441         if (setting != NULL)
 442                 g_key_file_set_string(keyfile,
 443                                 vpn_provider_get_save_group(provider),
 444                                 "OpenConnect.ServerCert", setting);
 445
 446         setting = vpn_provider_get_string(provider,
 447                                         "OpenConnect.CACert");
 448         if (setting != NULL)
 449                 g_key_file_set_string(keyfile,
 450                                 vpn_provider_get_save_group(provider),
 451                                 "OpenConnect.CACert", setting);
 452
 453         setting = vpn_provider_get_string(provider,
 454                                         "VPN.MTU");
 455         if (setting != NULL)
 456                 g_key_file_set_string(keyfile,
 457                                 vpn_provider_get_save_group(provider),
 458                                 "VPN.MTU", setting);
 459
 460         return 0;
 461 }
 462
 463 static int oc_error_code(int exit_code)
 464 {
 465
 466         switch (exit_code) {
 467         case 1:
 468                 return VPN_PROVIDER_ERROR_CONNECT_FAILED;
 469         case 2:
 470                 return VPN_PROVIDER_ERROR_LOGIN_FAILED;
 471         default:
 472                 return VPN_PROVIDER_ERROR_UNKNOWN;
 473         }
 474 }
 475
 476 static struct vpn_driver vpn_driver = {
 477         .notify         = oc_notify,
 478         .connect        = oc_connect,
 479         .error_code     = oc_error_code,
 480         .save           = oc_save,
 481 };
 482
 483 static int openconnect_init(void)
 484 {
 485         return vpn_register("openconnect", &vpn_driver, OPENCONNECT);
 486 }
 487
 488 static void openconnect_exit(void)
 489 {
 490         vpn_unregister("openconnect");
 491 }
 492
 493 CONNMAN_PLUGIN_DEFINE(openconnect, "OpenConnect VPN plugin", VERSION,
 494         CONNMAN_PLUGIN_PRIORITY_DEFAULT, openconnect_init, openconnect_exit)