vpn/plugins/l2tp.c

   1 /*
   2  *
   3  *  ConnMan VPN daemon
   4  *
   5  *  Copyright (C) 2010  BMW Car IT GmbH. All rights reserved.
   6  *  Copyright (C) 2012  Intel Corporation. All rights reserved.
   7  *
   8  *  This program is free software; you can redistribute it and/or modify
   9  *  it under the terms of the GNU General Public License version 2 as
  10  *  published by the Free Software Foundation.
  11  *
  12  *  This program is distributed in the hope that it will be useful,
  13  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  *  GNU General Public License for more details.
  16  *
  17  *  You should have received a copy of the GNU General Public License
  18  *  along with this program; if not, write to the Free Software
  19  *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  20  *
  21  */
  22
  23 #ifdef HAVE_CONFIG_H
  24 #include <config.h>
  25 #endif
  26
  27 #include <string.h>
  28 #include <errno.h>
  29 #include <unistd.h>
  30 #include <sys/types.h>
  31 #include <sys/stat.h>
  32 #include <fcntl.h>
  33
  34 #include <stdio.h>
  35 #include <net/if.h>
  36
  37 #include <dbus/dbus.h>
  38 #include <glib.h>
  39
  40 #define CONNMAN_API_SUBJECT_TO_CHANGE
  41 #include <connman/plugin.h>
  42 #include <connman/provider.h>
  43 #include <connman/log.h>
  44 #include <connman/task.h>
  45 #include <connman/dbus.h>
  46 #include <connman/inet.h>
  47 #include <connman/agent.h>
  48 #include <connman/setting.h>
  49 #include <connman/vpn-dbus.h>
  50
  51 #include "../vpn-provider.h"
  52 #include "../vpn-agent.h"
  53
  54 #include "vpn.h"
  55
  56 #define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
  57
  58 enum {
  59         OPT_STRING = 1,
  60         OPT_BOOL = 2,
  61 };
  62
  63 enum {
  64         OPT_ALL = 1,
  65         OPT_L2G = 2,
  66         OPT_L2  = 3,
  67         OPT_PPPD = 4,
  68 };
  69
  70 struct {
  71         const char *cm_opt;
  72         const char *pppd_opt;
  73         int sub;
  74         const char *vpn_default;
  75         int type;
  76 } pppd_options[] = {
  77         { "L2TP.User", "name", OPT_ALL, NULL, OPT_STRING },
  78         { "L2TP.BPS", "bps", OPT_L2, NULL, OPT_STRING },
  79         { "L2TP.TXBPS", "tx bps", OPT_L2, NULL, OPT_STRING },
  80         { "L2TP.RXBPS", "rx bps", OPT_L2, NULL, OPT_STRING },
  81         { "L2TP.LengthBit", "length bit", OPT_L2, NULL, OPT_STRING },
  82         { "L2TP.Challenge", "challenge", OPT_L2, NULL, OPT_STRING },
  83         { "L2TP.DefaultRoute", "defaultroute", OPT_L2, NULL, OPT_STRING },
  84         { "L2TP.FlowBit", "flow bit", OPT_L2, NULL, OPT_STRING },
  85         { "L2TP.TunnelRWS", "tunnel rws", OPT_L2, NULL, OPT_STRING },
  86         { "L2TP.Exclusive", "exclusive", OPT_L2, NULL, OPT_STRING },
  87         { "L2TP.Autodial", "autodial", OPT_L2, "yes", OPT_STRING },
  88         { "L2TP.Redial", "redial", OPT_L2, "yes", OPT_STRING },
  89         { "L2TP.RedialTimeout", "redial timeout", OPT_L2, "10", OPT_STRING },
  90         { "L2TP.MaxRedials", "max redials", OPT_L2, NULL, OPT_STRING },
  91         { "L2TP.RequirePAP", "require pap", OPT_L2, "no", OPT_STRING },
  92         { "L2TP.RequireCHAP", "require chap", OPT_L2, "yes", OPT_STRING },
  93         { "L2TP.ReqAuth", "require authentication", OPT_L2, "no", OPT_STRING },
  94         { "L2TP.AccessControl", "access control", OPT_L2G, "yes", OPT_STRING },
  95         { "L2TP.AuthFile", "auth file", OPT_L2G, NULL, OPT_STRING },
  96         { "L2TP.ForceUserSpace", "force userspace", OPT_L2G, NULL, OPT_STRING },
  97         { "L2TP.ListenAddr", "listen-addr", OPT_L2G, NULL, OPT_STRING },
  98         { "L2TP.Rand Source", "rand source", OPT_L2G, NULL, OPT_STRING },
  99         { "L2TP.IPsecSaref", "ipsec saref", OPT_L2G, NULL, OPT_STRING },
 100         { "L2TP.Port", "port", OPT_L2G, NULL, OPT_STRING },
 101         { "PPPD.EchoFailure", "lcp-echo-failure", OPT_PPPD, "0", OPT_STRING },
 102         { "PPPD.EchoInterval", "lcp-echo-interval", OPT_PPPD, "0", OPT_STRING },
 103         { "PPPD.Debug", "debug", OPT_PPPD, NULL, OPT_STRING },
 104         { "PPPD.RefuseEAP", "refuse-eap", OPT_PPPD, NULL, OPT_BOOL },
 105         { "PPPD.RefusePAP", "refuse-pap", OPT_PPPD, NULL, OPT_BOOL },
 106         { "PPPD.RefuseCHAP", "refuse-chap", OPT_PPPD, NULL, OPT_BOOL },
 107         { "PPPD.RefuseMSCHAP", "refuse-mschap", OPT_PPPD, NULL, OPT_BOOL },
 108         { "PPPD.RefuseMSCHAP2", "refuse-mschapv2", OPT_PPPD, NULL, OPT_BOOL },
 109         { "PPPD.NoBSDComp", "nobsdcomp", OPT_PPPD, NULL, OPT_BOOL },
 110         { "PPPD.NoPcomp", "nopcomp", OPT_PPPD, NULL, OPT_BOOL },
 111         { "PPPD.UseAccomp", "accomp", OPT_PPPD, NULL, OPT_BOOL },
 112         { "PPPD.NoDeflate", "nodeflate", OPT_PPPD, NULL, OPT_BOOL },
 113         { "PPPD.ReqMPPE", "require-mppe", OPT_PPPD, NULL, OPT_BOOL },
 114         { "PPPD.ReqMPPE40", "require-mppe-40", OPT_PPPD, NULL, OPT_BOOL },
 115         { "PPPD.ReqMPPE128", "require-mppe-128", OPT_PPPD, NULL, OPT_BOOL },
 116         { "PPPD.ReqMPPEStateful", "mppe-stateful", OPT_PPPD, NULL, OPT_BOOL },
 117         { "PPPD.NoVJ", "no-vj-comp", OPT_PPPD, NULL, OPT_BOOL },
 118 };
 119
 120 static DBusConnection *connection;
 121
 122 struct l2tp_private_data {
 123         struct connman_task *task;
 124         char *if_name;
 125         vpn_provider_connect_cb_t cb;
 126         void *user_data;
 127 };
 128
 129 static DBusMessage *l2tp_get_sec(struct connman_task *task,
 130                         DBusMessage *msg, void *user_data)
 131 {
 132         const char *user, *passwd;
 133         struct vpn_provider *provider = user_data;
 134
 135         if (dbus_message_get_no_reply(msg) == FALSE) {
 136                 DBusMessage *reply;
 137
 138                 user = vpn_provider_get_string(provider, "L2TP.User");
 139                 passwd = vpn_provider_get_string(provider, "L2TP.Password");
 140
 141                 if (user == NULL || strlen(user) == 0 ||
 142                                 passwd == NULL || strlen(passwd) == 0)
 143                         return NULL;
 144
 145                 reply = dbus_message_new_method_return(msg);
 146                 if (reply == NULL)
 147                         return NULL;
 148
 149                 dbus_message_append_args(reply, DBUS_TYPE_STRING, &user,
 150                                                 DBUS_TYPE_STRING, &passwd,
 151                                                 DBUS_TYPE_INVALID);
 152
 153                 return reply;
 154         }
 155
 156         return NULL;
 157 }
 158
 159 static int l2tp_notify(DBusMessage *msg, struct vpn_provider *provider)
 160 {
 161         DBusMessageIter iter, dict;
 162         const char *reason, *key, *value;
 163         char *addressv4 = NULL, *netmask = NULL, *gateway = NULL;
 164         char *ifname = NULL, *nameservers = NULL;
 165         struct connman_ipaddress *ipaddress = NULL;
 166
 167         dbus_message_iter_init(msg, &iter);
 168
 169         dbus_message_iter_get_basic(&iter, &reason);
 170         dbus_message_iter_next(&iter);
 171
 172         if (!provider) {
 173                 connman_error("No provider found");
 174                 return VPN_STATE_FAILURE;
 175         }
 176
 177         if (strcmp(reason, "auth failed") == 0) {
 178                 DBG("authentication failure");
 179
 180                 vpn_provider_set_string(provider, "L2TP.User", NULL);
 181                 vpn_provider_set_string(provider, "L2TP.Password", NULL);
 182
 183                 return VPN_STATE_AUTH_FAILURE;
 184         }
 185
 186         if (strcmp(reason, "connect"))
 187                 return VPN_STATE_DISCONNECT;
 188
 189         dbus_message_iter_recurse(&iter, &dict);
 190
 191         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 192                 DBusMessageIter entry;
 193
 194                 dbus_message_iter_recurse(&dict, &entry);
 195                 dbus_message_iter_get_basic(&entry, &key);
 196                 dbus_message_iter_next(&entry);
 197                 dbus_message_iter_get_basic(&entry, &value);
 198
 199                 DBG("%s = %s", key, value);
 200
 201                 if (!strcmp(key, "INTERNAL_IP4_ADDRESS")) {
 202                         vpn_provider_set_string(provider, "Address", value);
 203                         addressv4 = g_strdup(value);
 204                 }
 205
 206                 if (!strcmp(key, "INTERNAL_IP4_NETMASK")) {
 207                         vpn_provider_set_string(provider, "Netmask", value);
 208                         netmask = g_strdup(value);
 209                 }
 210
 211                 if (!strcmp(key, "INTERNAL_IP4_DNS")) {
 212                         vpn_provider_set_string(provider, "DNS", value);
 213                         nameservers = g_strdup(value);
 214                 }
 215
 216                 if (!strcmp(key, "INTERNAL_IFNAME"))
 217                         ifname = g_strdup(value);
 218
 219                 dbus_message_iter_next(&dict);
 220         }
 221
 222         if (vpn_set_ifname(provider, ifname) < 0) {
 223                 g_free(ifname);
 224                 g_free(addressv4);
 225                 g_free(netmask);
 226                 g_free(nameservers);
 227                 return VPN_STATE_FAILURE;
 228         }
 229
 230         if (addressv4 != NULL)
 231                 ipaddress = connman_ipaddress_alloc(AF_INET);
 232
 233         g_free(ifname);
 234
 235         if (ipaddress == NULL) {
 236                 connman_error("No IP address for provider");
 237                 g_free(addressv4);
 238                 g_free(netmask);
 239                 g_free(nameservers);
 240                 return VPN_STATE_FAILURE;
 241         }
 242
 243         value = vpn_provider_get_string(provider, "HostIP");
 244         if (value != NULL) {
 245                 vpn_provider_set_string(provider, "Gateway", value);
 246                 gateway = g_strdup(value);
 247         }
 248
 249         if (addressv4 != NULL)
 250                 connman_ipaddress_set_ipv4(ipaddress, addressv4, netmask,
 251                                         gateway);
 252
 253         vpn_provider_set_ipaddress(provider, ipaddress);
 254         vpn_provider_set_nameservers(provider, nameservers);
 255
 256         g_free(addressv4);
 257         g_free(netmask);
 258         g_free(gateway);
 259         g_free(nameservers);
 260         connman_ipaddress_free(ipaddress);
 261
 262         return VPN_STATE_CONNECT;
 263 }
 264
 265 static int l2tp_save(struct vpn_provider *provider, GKeyFile *keyfile)
 266 {
 267         const char *option;
 268         connman_bool_t l2tp_option, pppd_option;
 269         int i;
 270
 271         for (i = 0; i < (int)ARRAY_SIZE(pppd_options); i++) {
 272                 l2tp_option = pppd_option = FALSE;
 273
 274                 if (strncmp(pppd_options[i].cm_opt, "L2TP.", 5) == 0)
 275                         l2tp_option = TRUE;
 276
 277                 if (strncmp(pppd_options[i].cm_opt, "PPPD.", 5) == 0)
 278                         pppd_option = TRUE;
 279
 280                 if (l2tp_option == TRUE || pppd_option == TRUE) {
 281                         option = vpn_provider_get_string(provider,
 282                                                 pppd_options[i].cm_opt);
 283                         if (option == NULL) {
 284                                 /*
 285                                  * Check if the option prefix is L2TP as the
 286                                  * PPPD options were using L2TP prefix earlier.
 287                                  */
 288                                 char *l2tp_str;
 289
 290                                 if (pppd_option == FALSE)
 291                                         continue;
 292
 293                                 l2tp_str = g_strdup_printf("L2TP.%s",
 294                                                 &pppd_options[i].cm_opt[5]);
 295                                 option = vpn_provider_get_string(provider,
 296                                                                 l2tp_str);
 297                                 g_free(l2tp_str);
 298
 299                                 if (option == NULL)
 300                                         continue;
 301                         }
 302
 303                         g_key_file_set_string(keyfile,
 304                                         vpn_provider_get_save_group(provider),
 305                                         pppd_options[i].cm_opt, option);
 306                 }
 307         }
 308
 309         return 0;
 310 }
 311
 312 static ssize_t full_write(int fd, const void *buf, size_t len)
 313 {
 314         ssize_t byte_write;
 315
 316         while (len) {
 317                 byte_write = write(fd, buf, len);
 318                 if (byte_write < 0) {
 319                         connman_error("failed to write config to l2tp: %s\n",
 320                                         strerror(errno));
 321                         return byte_write;
 322                 }
 323                 len -= byte_write;
 324                 buf += byte_write;
 325         }
 326
 327         return 0;
 328 }
 329
 330 static ssize_t l2tp_write_bool_option(int fd,
 331                                         const char *key, const char *value)
 332 {
 333         gchar *buf;
 334         ssize_t ret = 0;
 335
 336         if (key != NULL && value != NULL) {
 337                 if (strcasecmp(value, "yes") == 0 ||
 338                                 strcasecmp(value, "true") == 0 ||
 339                                 strcmp(value, "1") == 0) {
 340                         buf = g_strdup_printf("%s\n", key);
 341                         ret = full_write(fd, buf, strlen(buf));
 342
 343                         g_free(buf);
 344                 }
 345         }
 346
 347         return ret;
 348 }
 349
 350 static int l2tp_write_option(int fd, const char *key, const char *value)
 351 {
 352         gchar *buf;
 353         ssize_t ret = 0;
 354
 355         if (key != NULL) {
 356                 if (value != NULL)
 357                         buf = g_strdup_printf("%s %s\n", key, value);
 358                 else
 359                         buf = g_strdup_printf("%s\n", key);
 360
 361                 ret = full_write(fd, buf, strlen(buf));
 362
 363                 g_free(buf);
 364         }
 365
 366         return ret;
 367 }
 368
 369 static int l2tp_write_section(int fd, const char *key, const char *value)
 370 {
 371         gchar *buf;
 372         ssize_t ret = 0;
 373
 374         if (key != NULL && value != NULL) {
 375                 buf = g_strdup_printf("%s = %s\n", key, value);
 376                 ret = full_write(fd, buf, strlen(buf));
 377
 378                 g_free(buf);
 379         }
 380
 381         return ret;
 382 }
 383
 384 static int write_pppd_option(struct vpn_provider *provider, int fd)
 385 {
 386         int i;
 387         const char *opt_s;
 388
 389         l2tp_write_option(fd, "nodetach", NULL);
 390         l2tp_write_option(fd, "lock", NULL);
 391         l2tp_write_option(fd, "usepeerdns", NULL);
 392         l2tp_write_option(fd, "noipdefault", NULL);
 393         l2tp_write_option(fd, "noauth", NULL);
 394         l2tp_write_option(fd, "nodefaultroute", NULL);
 395         l2tp_write_option(fd, "ipparam", "l2tp_plugin");
 396
 397         for (i = 0; i < (int)ARRAY_SIZE(pppd_options); i++) {
 398                 if (pppd_options[i].sub != OPT_ALL &&
 399                         pppd_options[i].sub != OPT_PPPD)
 400                         continue;
 401
 402                 opt_s = vpn_provider_get_string(provider,
 403                                         pppd_options[i].cm_opt);
 404                 if (!opt_s)
 405                         opt_s = pppd_options[i].vpn_default;
 406
 407                 if (!opt_s)
 408                         continue;
 409
 410                 if (pppd_options[i].type == OPT_STRING)
 411                         l2tp_write_option(fd,
 412                                 pppd_options[i].pppd_opt, opt_s);
 413                 else if (pppd_options[i].type == OPT_BOOL)
 414                         l2tp_write_bool_option(fd,
 415                                 pppd_options[i].pppd_opt, opt_s);
 416         }
 417
 418         l2tp_write_option(fd, "plugin",
 419                                 SCRIPTDIR "/libppp-plugin.so");
 420
 421         return 0;
 422 }
 423
 424
 425 static int l2tp_write_fields(struct vpn_provider *provider,
 426                                                 int fd, int sub)
 427 {
 428         int i;
 429         const char *opt_s;
 430
 431         for (i = 0; i < (int)ARRAY_SIZE(pppd_options); i++) {
 432                 if (pppd_options[i].sub != sub)
 433                         continue;
 434
 435                 opt_s = vpn_provider_get_string(provider,
 436                                         pppd_options[i].cm_opt);
 437                 if (!opt_s)
 438                         opt_s = pppd_options[i].vpn_default;
 439
 440                 if (!opt_s)
 441                         continue;
 442
 443                 if (pppd_options[i].type == OPT_STRING)
 444                         l2tp_write_section(fd,
 445                                 pppd_options[i].pppd_opt, opt_s);
 446                 else if (pppd_options[i].type == OPT_BOOL)
 447                         l2tp_write_bool_option(fd,
 448                                 pppd_options[i].pppd_opt, opt_s);
 449         }
 450
 451         return 0;
 452 }
 453
 454 static int l2tp_write_config(struct vpn_provider *provider,
 455                                         const char *pppd_name, int fd)
 456 {
 457         const char *option;
 458
 459         l2tp_write_option(fd, "[global]", NULL);
 460         l2tp_write_fields(provider, fd, OPT_L2G);
 461
 462         l2tp_write_option(fd, "[lac l2tp]", NULL);
 463
 464         option = vpn_provider_get_string(provider, "Host");
 465         l2tp_write_option(fd, "lns =", option);
 466
 467         l2tp_write_fields(provider, fd, OPT_ALL);
 468         l2tp_write_fields(provider, fd, OPT_L2);
 469
 470         l2tp_write_option(fd, "pppoptfile =", pppd_name);
 471
 472         return 0;
 473 }
 474
 475 static void l2tp_died(struct connman_task *task, int exit_code, void *user_data)
 476 {
 477         char *conf_file;
 478
 479         vpn_died(task, exit_code, user_data);
 480
 481         conf_file = g_strdup_printf("/var/run/connman/connman-xl2tpd.conf");
 482         unlink(conf_file);
 483         g_free(conf_file);
 484
 485         conf_file = g_strdup_printf("/var/run/connman/connman-ppp-option.conf");
 486         unlink(conf_file);
 487         g_free(conf_file);
 488 }
 489
 490 struct request_input_reply {
 491         struct vpn_provider *provider;
 492         vpn_provider_password_cb_t callback;
 493         void *user_data;
 494 };
 495
 496 static void request_input_reply(DBusMessage *reply, void *user_data)
 497 {
 498         struct request_input_reply *l2tp_reply = user_data;
 499         const char *error = NULL;
 500         char *username = NULL, *password = NULL;
 501         char *key;
 502         DBusMessageIter iter, dict;
 503
 504         DBG("provider %p", l2tp_reply->provider);
 505
 506         if (dbus_message_get_type(reply) == DBUS_MESSAGE_TYPE_ERROR) {
 507                 error = dbus_message_get_error_name(reply);
 508                 goto done;
 509         }
 510
 511         if (vpn_agent_check_reply_has_dict(reply) == FALSE)
 512                 goto done;
 513
 514         dbus_message_iter_init(reply, &iter);
 515         dbus_message_iter_recurse(&iter, &dict);
 516         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 517                 DBusMessageIter entry, value;
 518                 const char *str;
 519
 520                 dbus_message_iter_recurse(&dict, &entry);
 521                 if (dbus_message_iter_get_arg_type(&entry) != DBUS_TYPE_STRING)
 522                         break;
 523
 524                 dbus_message_iter_get_basic(&entry, &key);
 525
 526                 if (g_str_equal(key, "Username")) {
 527                         dbus_message_iter_next(&entry);
 528                         if (dbus_message_iter_get_arg_type(&entry)
 529                                                         != DBUS_TYPE_VARIANT)
 530                                 break;
 531                         dbus_message_iter_recurse(&entry, &value);
 532                         if (dbus_message_iter_get_arg_type(&value)
 533                                                         != DBUS_TYPE_STRING)
 534                                 break;
 535                         dbus_message_iter_get_basic(&value, &str);
 536                         username = g_strdup(str);
 537                 }
 538
 539                 if (g_str_equal(key, "Password")) {
 540                         dbus_message_iter_next(&entry);
 541                         if (dbus_message_iter_get_arg_type(&entry)
 542                                                         != DBUS_TYPE_VARIANT)
 543                                 break;
 544                         dbus_message_iter_recurse(&entry, &value);
 545                         if (dbus_message_iter_get_arg_type(&value)
 546                                                         != DBUS_TYPE_STRING)
 547                                 break;
 548                         dbus_message_iter_get_basic(&value, &str);
 549                         password = g_strdup(str);
 550                 }
 551
 552                 dbus_message_iter_next(&dict);
 553         }
 554
 555 done:
 556         l2tp_reply->callback(l2tp_reply->provider, username, password, error,
 557                                 l2tp_reply->user_data);
 558
 559         g_free(username);
 560         g_free(password);
 561
 562         g_free(l2tp_reply);
 563 }
 564
 565 typedef void (* request_cb_t)(struct vpn_provider *provider,
 566                                 const char *username, const char *password,
 567                                 const char *error, void *user_data);
 568
 569 static int request_input(struct vpn_provider *provider,
 570                                 request_cb_t callback, void *user_data)
 571 {
 572         DBusMessage *message;
 573         const char *path, *agent_sender, *agent_path;
 574         DBusMessageIter iter;
 575         DBusMessageIter dict;
 576         struct request_input_reply *l2tp_reply;
 577         int err;
 578
 579         connman_agent_get_info(&agent_sender, &agent_path);
 580
 581         if (provider == NULL || agent_path == NULL || callback == NULL)
 582                 return -ESRCH;
 583
 584         message = dbus_message_new_method_call(agent_sender, agent_path,
 585                                         VPN_AGENT_INTERFACE,
 586                                         "RequestInput");
 587         if (message == NULL)
 588                 return -ENOMEM;
 589
 590         dbus_message_iter_init_append(message, &iter);
 591
 592         path = vpn_provider_get_path(provider);
 593         dbus_message_iter_append_basic(&iter,
 594                                 DBUS_TYPE_OBJECT_PATH, &path);
 595
 596         connman_dbus_dict_open(&iter, &dict);
 597
 598         vpn_agent_append_user_info(&dict, provider, "L2TP.User");
 599
 600         vpn_agent_append_host_and_name(&dict, provider);
 601
 602         connman_dbus_dict_close(&iter, &dict);
 603
 604         l2tp_reply = g_try_new0(struct request_input_reply, 1);
 605         if (l2tp_reply == NULL) {
 606                 dbus_message_unref(message);
 607                 return -ENOMEM;
 608         }
 609
 610         l2tp_reply->provider = provider;
 611         l2tp_reply->callback = callback;
 612         l2tp_reply->user_data = user_data;
 613
 614         err = connman_agent_queue_message(provider, message,
 615                         connman_timeout_input_request(),
 616                         request_input_reply, l2tp_reply);
 617         if (err < 0 && err != -EBUSY) {
 618                 DBG("error %d sending agent request", err);
 619                 dbus_message_unref(message);
 620                 g_free(l2tp_reply);
 621                 return err;
 622         }
 623
 624         dbus_message_unref(message);
 625
 626         return -EINPROGRESS;
 627 }
 628
 629 static int run_connect(struct vpn_provider *provider,
 630                         struct connman_task *task, const char *if_name,
 631                         vpn_provider_connect_cb_t cb, void *user_data,
 632                         const char *username, const char *password)
 633 {
 634         char *l2tp_name, *pppd_name;
 635         int l2tp_fd, pppd_fd;
 636         int err;
 637
 638         if (username == NULL || password == NULL) {
 639                 DBG("Cannot connect username %s password %p",
 640                                                 username, password);
 641                 err = -EINVAL;
 642                 goto done;
 643         }
 644
 645         DBG("username %s password %p", username, password);
 646
 647         l2tp_name = g_strdup_printf("/var/run/connman/connman-xl2tpd.conf");
 648
 649         l2tp_fd = open(l2tp_name, O_RDWR|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);
 650         if (l2tp_fd < 0) {
 651                 g_free(l2tp_name);
 652                 connman_error("Error writing l2tp config");
 653                 err = -EIO;
 654                 goto done;
 655         }
 656
 657         pppd_name = g_strdup_printf("/var/run/connman/connman-ppp-option.conf");
 658
 659         pppd_fd = open(pppd_name, O_RDWR|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);
 660         if (pppd_fd < 0) {
 661                 connman_error("Error writing pppd config");
 662                 g_free(l2tp_name);
 663                 g_free(pppd_name);
 664                 close(l2tp_fd);
 665                 err = -EIO;
 666                 goto done;
 667         }
 668
 669         l2tp_write_config(provider, pppd_name, l2tp_fd);
 670
 671         write_pppd_option(provider, pppd_fd);
 672
 673         connman_task_add_argument(task, "-D", NULL);
 674         connman_task_add_argument(task, "-c", l2tp_name);
 675
 676         g_free(l2tp_name);
 677         g_free(pppd_name);
 678
 679         err = connman_task_run(task, l2tp_died, provider,
 680                                 NULL, NULL, NULL);
 681         if (err < 0) {
 682                 connman_error("l2tp failed to start");
 683                 err = -EIO;
 684                 goto done;
 685         }
 686
 687 done:
 688         if (cb != NULL)
 689                 cb(provider, user_data, err);
 690
 691         return err;
 692 }
 693
 694 static void free_private_data(struct l2tp_private_data *data)
 695 {
 696         g_free(data->if_name);
 697         g_free(data);
 698 }
 699
 700 static void request_input_cb(struct vpn_provider *provider,
 701                         const char *username,
 702                         const char *password,
 703                         const char *error, void *user_data)
 704 {
 705         struct l2tp_private_data *data = user_data;
 706
 707         if (username == NULL || password == NULL)
 708                 DBG("Requesting username %s or password failed, error %s",
 709                         username, error);
 710         else if (error != NULL)
 711                 DBG("error %s", error);
 712
 713         vpn_provider_set_string(provider, "L2TP.User", username);
 714         vpn_provider_set_string_hide_value(provider, "L2TP.Password",
 715                                                                 password);
 716
 717         run_connect(provider, data->task, data->if_name, data->cb,
 718                 data->user_data, username, password);
 719
 720         free_private_data(data);
 721 }
 722
 723 static int l2tp_connect(struct vpn_provider *provider,
 724                         struct connman_task *task, const char *if_name,
 725                         vpn_provider_connect_cb_t cb, void *user_data)
 726 {
 727         const char *username, *password;
 728         int err;
 729
 730         if (connman_task_set_notify(task, "getsec",
 731                                         l2tp_get_sec, provider) != 0) {
 732                 err = -ENOMEM;
 733                 goto error;
 734         }
 735
 736         username = vpn_provider_get_string(provider, "L2TP.User");
 737         password = vpn_provider_get_string(provider, "L2TP.Password");
 738
 739         DBG("user %s password %p", username, password);
 740
 741         if (username == NULL || password == NULL) {
 742                 struct l2tp_private_data *data;
 743
 744                 data = g_try_new0(struct l2tp_private_data, 1);
 745                 if (data == NULL)
 746                         return -ENOMEM;
 747
 748                 data->task = task;
 749                 data->if_name = g_strdup(if_name);
 750                 data->cb = cb;
 751                 data->user_data = user_data;
 752
 753                 err = request_input(provider, request_input_cb, data);
 754                 if (err != -EINPROGRESS) {
 755                         free_private_data(data);
 756                         goto done;
 757                 }
 758                 return err;
 759         }
 760
 761 done:
 762         return run_connect(provider, task, if_name, cb, user_data,
 763                                                         username, password);
 764
 765 error:
 766         if (cb != NULL)
 767                 cb(provider, user_data, err);
 768
 769         return err;
 770 }
 771
 772 static int l2tp_error_code(int exit_code)
 773 {
 774         switch (exit_code) {
 775         case 1:
 776                 return CONNMAN_PROVIDER_ERROR_CONNECT_FAILED;
 777         default:
 778                 return CONNMAN_PROVIDER_ERROR_UNKNOWN;
 779         }
 780 }
 781
 782 static void l2tp_disconnect(struct vpn_provider *provider)
 783 {
 784         vpn_provider_set_string(provider, "L2TP.Password", NULL);
 785 }
 786
 787 static struct vpn_driver vpn_driver = {
 788         .flags          = VPN_FLAG_NO_TUN,
 789         .notify         = l2tp_notify,
 790         .connect        = l2tp_connect,
 791         .error_code     = l2tp_error_code,
 792         .save           = l2tp_save,
 793         .disconnect     = l2tp_disconnect,
 794 };
 795
 796 static int l2tp_init(void)
 797 {
 798         connection = connman_dbus_get_connection();
 799
 800         return vpn_register("l2tp", &vpn_driver, L2TP);
 801 }
 802
 803 static void l2tp_exit(void)
 804 {
 805         vpn_unregister("l2tp");
 806
 807         dbus_connection_unref(connection);
 808 }
 809
 810 CONNMAN_PLUGIN_DEFINE(l2tp, "l2tp plugin", VERSION,
 811         CONNMAN_PLUGIN_PRIORITY_DEFAULT, l2tp_init, l2tp_exit)