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                 return VPN_STATE_AUTH_FAILURE;
 179
 180         if (strcmp(reason, "connect"))
 181                 return VPN_STATE_DISCONNECT;
 182
 183         dbus_message_iter_recurse(&iter, &dict);
 184
 185         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 186                 DBusMessageIter entry;
 187
 188                 dbus_message_iter_recurse(&dict, &entry);
 189                 dbus_message_iter_get_basic(&entry, &key);
 190                 dbus_message_iter_next(&entry);
 191                 dbus_message_iter_get_basic(&entry, &value);
 192
 193                 DBG("%s = %s", key, value);
 194
 195                 if (!strcmp(key, "INTERNAL_IP4_ADDRESS")) {
 196                         vpn_provider_set_string(provider, "Address", value);
 197                         addressv4 = g_strdup(value);
 198                 }
 199
 200                 if (!strcmp(key, "INTERNAL_IP4_NETMASK")) {
 201                         vpn_provider_set_string(provider, "Netmask", value);
 202                         netmask = g_strdup(value);
 203                 }
 204
 205                 if (!strcmp(key, "INTERNAL_IP4_DNS")) {
 206                         vpn_provider_set_string(provider, "DNS", value);
 207                         nameservers = g_strdup(value);
 208                 }
 209
 210                 if (!strcmp(key, "INTERNAL_IFNAME"))
 211                         ifname = g_strdup(value);
 212
 213                 dbus_message_iter_next(&dict);
 214         }
 215
 216         if (vpn_set_ifname(provider, ifname) < 0) {
 217                 g_free(ifname);
 218                 g_free(addressv4);
 219                 g_free(netmask);
 220                 g_free(nameservers);
 221                 return VPN_STATE_FAILURE;
 222         }
 223
 224         if (addressv4 != NULL)
 225                 ipaddress = connman_ipaddress_alloc(AF_INET);
 226
 227         g_free(ifname);
 228
 229         if (ipaddress == NULL) {
 230                 connman_error("No IP address for provider");
 231                 g_free(addressv4);
 232                 g_free(netmask);
 233                 g_free(nameservers);
 234                 return VPN_STATE_FAILURE;
 235         }
 236
 237         value = vpn_provider_get_string(provider, "HostIP");
 238         if (value != NULL) {
 239                 vpn_provider_set_string(provider, "Gateway", value);
 240                 gateway = g_strdup(value);
 241         }
 242
 243         if (addressv4 != NULL)
 244                 connman_ipaddress_set_ipv4(ipaddress, addressv4, netmask,
 245                                         gateway);
 246
 247         vpn_provider_set_ipaddress(provider, ipaddress);
 248         vpn_provider_set_nameservers(provider, nameservers);
 249
 250         g_free(addressv4);
 251         g_free(netmask);
 252         g_free(gateway);
 253         g_free(nameservers);
 254         connman_ipaddress_free(ipaddress);
 255
 256         return VPN_STATE_CONNECT;
 257 }
 258
 259 static int l2tp_save(struct vpn_provider *provider, GKeyFile *keyfile)
 260 {
 261         const char *option;
 262         connman_bool_t l2tp_option, pppd_option;
 263         int i;
 264
 265         for (i = 0; i < (int)ARRAY_SIZE(pppd_options); i++) {
 266                 l2tp_option = pppd_option = FALSE;
 267
 268                 if (strncmp(pppd_options[i].cm_opt, "L2TP.", 5) == 0)
 269                         l2tp_option = TRUE;
 270
 271                 if (strncmp(pppd_options[i].cm_opt, "PPPD.", 5) == 0)
 272                         pppd_option = TRUE;
 273
 274                 if (l2tp_option == TRUE || pppd_option == TRUE) {
 275                         option = vpn_provider_get_string(provider,
 276                                                 pppd_options[i].cm_opt);
 277                         if (option == NULL) {
 278                                 /*
 279                                  * Check if the option prefix is L2TP as the
 280                                  * PPPD options were using L2TP prefix earlier.
 281                                  */
 282                                 char *l2tp_str;
 283
 284                                 if (pppd_option == FALSE)
 285                                         continue;
 286
 287                                 l2tp_str = g_strdup_printf("L2TP.%s",
 288                                                 &pppd_options[i].cm_opt[5]);
 289                                 option = vpn_provider_get_string(provider,
 290                                                                 l2tp_str);
 291                                 g_free(l2tp_str);
 292
 293                                 if (option == NULL)
 294                                         continue;
 295                         }
 296
 297                         g_key_file_set_string(keyfile,
 298                                         vpn_provider_get_save_group(provider),
 299                                         pppd_options[i].cm_opt, option);
 300                 }
 301         }
 302
 303         return 0;
 304 }
 305
 306 static ssize_t full_write(int fd, const void *buf, size_t len)
 307 {
 308         ssize_t byte_write;
 309
 310         while (len) {
 311                 byte_write = write(fd, buf, len);
 312                 if (byte_write < 0) {
 313                         connman_error("failed to write config to l2tp: %s\n",
 314                                         strerror(errno));
 315                         return byte_write;
 316                 }
 317                 len -= byte_write;
 318                 buf += byte_write;
 319         }
 320
 321         return 0;
 322 }
 323
 324 static ssize_t l2tp_write_bool_option(int fd,
 325                                         const char *key, const char *value)
 326 {
 327         gchar *buf;
 328         ssize_t ret = 0;
 329
 330         if (key != NULL && value != NULL) {
 331                 if (strcasecmp(value, "yes") == 0 ||
 332                                 strcasecmp(value, "true") == 0 ||
 333                                 strcmp(value, "1") == 0) {
 334                         buf = g_strdup_printf("%s\n", key);
 335                         ret = full_write(fd, buf, strlen(buf));
 336
 337                         g_free(buf);
 338                 }
 339         }
 340
 341         return ret;
 342 }
 343
 344 static int l2tp_write_option(int fd, const char *key, const char *value)
 345 {
 346         gchar *buf;
 347         ssize_t ret = 0;
 348
 349         if (key != NULL) {
 350                 if (value != NULL)
 351                         buf = g_strdup_printf("%s %s\n", key, value);
 352                 else
 353                         buf = g_strdup_printf("%s\n", key);
 354
 355                 ret = full_write(fd, buf, strlen(buf));
 356
 357                 g_free(buf);
 358         }
 359
 360         return ret;
 361 }
 362
 363 static int l2tp_write_section(int fd, const char *key, const char *value)
 364 {
 365         gchar *buf;
 366         ssize_t ret = 0;
 367
 368         if (key != NULL && value != NULL) {
 369                 buf = g_strdup_printf("%s = %s\n", key, value);
 370                 ret = full_write(fd, buf, strlen(buf));
 371
 372                 g_free(buf);
 373         }
 374
 375         return ret;
 376 }
 377
 378 static int write_pppd_option(struct vpn_provider *provider, int fd)
 379 {
 380         int i;
 381         const char *opt_s;
 382
 383         l2tp_write_option(fd, "nodetach", NULL);
 384         l2tp_write_option(fd, "lock", NULL);
 385         l2tp_write_option(fd, "usepeerdns", NULL);
 386         l2tp_write_option(fd, "noipdefault", NULL);
 387         l2tp_write_option(fd, "noauth", NULL);
 388         l2tp_write_option(fd, "nodefaultroute", NULL);
 389         l2tp_write_option(fd, "ipparam", "l2tp_plugin");
 390
 391         for (i = 0; i < (int)ARRAY_SIZE(pppd_options); i++) {
 392                 if (pppd_options[i].sub != OPT_ALL &&
 393                         pppd_options[i].sub != OPT_PPPD)
 394                         continue;
 395
 396                 opt_s = vpn_provider_get_string(provider,
 397                                         pppd_options[i].cm_opt);
 398                 if (!opt_s)
 399                         opt_s = pppd_options[i].vpn_default;
 400
 401                 if (!opt_s)
 402                         continue;
 403
 404                 if (pppd_options[i].type == OPT_STRING)
 405                         l2tp_write_option(fd,
 406                                 pppd_options[i].pppd_opt, opt_s);
 407                 else if (pppd_options[i].type == OPT_BOOL)
 408                         l2tp_write_bool_option(fd,
 409                                 pppd_options[i].pppd_opt, opt_s);
 410         }
 411
 412         l2tp_write_option(fd, "plugin",
 413                                 SCRIPTDIR "/libppp-plugin.so");
 414
 415         return 0;
 416 }
 417
 418
 419 static int l2tp_write_fields(struct vpn_provider *provider,
 420                                                 int fd, int sub)
 421 {
 422         int i;
 423         const char *opt_s;
 424
 425         for (i = 0; i < (int)ARRAY_SIZE(pppd_options); i++) {
 426                 if (pppd_options[i].sub != sub)
 427                         continue;
 428
 429                 opt_s = vpn_provider_get_string(provider,
 430                                         pppd_options[i].cm_opt);
 431                 if (!opt_s)
 432                         opt_s = pppd_options[i].vpn_default;
 433
 434                 if (!opt_s)
 435                         continue;
 436
 437                 if (pppd_options[i].type == OPT_STRING)
 438                         l2tp_write_section(fd,
 439                                 pppd_options[i].pppd_opt, opt_s);
 440                 else if (pppd_options[i].type == OPT_BOOL)
 441                         l2tp_write_bool_option(fd,
 442                                 pppd_options[i].pppd_opt, opt_s);
 443         }
 444
 445         return 0;
 446 }
 447
 448 static int l2tp_write_config(struct vpn_provider *provider,
 449                                         const char *pppd_name, int fd)
 450 {
 451         const char *option;
 452
 453         l2tp_write_option(fd, "[global]", NULL);
 454         l2tp_write_fields(provider, fd, OPT_L2G);
 455
 456         l2tp_write_option(fd, "[lac l2tp]", NULL);
 457
 458         option = vpn_provider_get_string(provider, "Host");
 459         l2tp_write_option(fd, "lns =", option);
 460
 461         l2tp_write_fields(provider, fd, OPT_ALL);
 462         l2tp_write_fields(provider, fd, OPT_L2);
 463
 464         l2tp_write_option(fd, "pppoptfile =", pppd_name);
 465
 466         return 0;
 467 }
 468
 469 static void l2tp_died(struct connman_task *task, int exit_code, void *user_data)
 470 {
 471         char *conf_file;
 472
 473         vpn_died(task, exit_code, user_data);
 474
 475         conf_file = g_strdup_printf("/var/run/connman/connman-xl2tpd.conf");
 476         unlink(conf_file);
 477         g_free(conf_file);
 478
 479         conf_file = g_strdup_printf("/var/run/connman/connman-ppp-option.conf");
 480         unlink(conf_file);
 481         g_free(conf_file);
 482 }
 483
 484 struct request_input_reply {
 485         struct vpn_provider *provider;
 486         vpn_provider_password_cb_t callback;
 487         void *user_data;
 488 };
 489
 490 static void request_input_reply(DBusMessage *reply, void *user_data)
 491 {
 492         struct request_input_reply *l2tp_reply = user_data;
 493         const char *error = NULL;
 494         char *username = NULL, *password = NULL;
 495         char *key;
 496         DBusMessageIter iter, dict;
 497
 498         DBG("provider %p", l2tp_reply->provider);
 499
 500         if (dbus_message_get_type(reply) == DBUS_MESSAGE_TYPE_ERROR) {
 501                 error = dbus_message_get_error_name(reply);
 502                 goto done;
 503         }
 504
 505         if (vpn_agent_check_reply_has_dict(reply) == FALSE)
 506                 goto done;
 507
 508         dbus_message_iter_init(reply, &iter);
 509         dbus_message_iter_recurse(&iter, &dict);
 510         while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
 511                 DBusMessageIter entry, value;
 512                 const char *str;
 513
 514                 dbus_message_iter_recurse(&dict, &entry);
 515                 if (dbus_message_iter_get_arg_type(&entry) != DBUS_TYPE_STRING)
 516                         break;
 517
 518                 dbus_message_iter_get_basic(&entry, &key);
 519
 520                 if (g_str_equal(key, "Username")) {
 521                         dbus_message_iter_next(&entry);
 522                         if (dbus_message_iter_get_arg_type(&entry)
 523                                                         != DBUS_TYPE_VARIANT)
 524                                 break;
 525                         dbus_message_iter_recurse(&entry, &value);
 526                         if (dbus_message_iter_get_arg_type(&value)
 527                                                         != DBUS_TYPE_STRING)
 528                                 break;
 529                         dbus_message_iter_get_basic(&value, &str);
 530                         username = g_strdup(str);
 531                 }
 532
 533                 if (g_str_equal(key, "Password")) {
 534                         dbus_message_iter_next(&entry);
 535                         if (dbus_message_iter_get_arg_type(&entry)
 536                                                         != DBUS_TYPE_VARIANT)
 537                                 break;
 538                         dbus_message_iter_recurse(&entry, &value);
 539                         if (dbus_message_iter_get_arg_type(&value)
 540                                                         != DBUS_TYPE_STRING)
 541                                 break;
 542                         dbus_message_iter_get_basic(&value, &str);
 543                         password = g_strdup(str);
 544                 }
 545
 546                 dbus_message_iter_next(&dict);
 547         }
 548
 549 done:
 550         l2tp_reply->callback(l2tp_reply->provider, username, password, error,
 551                                 l2tp_reply->user_data);
 552
 553         g_free(username);
 554         g_free(password);
 555
 556         g_free(l2tp_reply);
 557 }
 558
 559 typedef void (* request_cb_t)(struct vpn_provider *provider,
 560                                 const char *username, const char *password,
 561                                 const char *error, void *user_data);
 562
 563 static int request_input(struct vpn_provider *provider,
 564                                 request_cb_t callback, void *user_data)
 565 {
 566         DBusMessage *message;
 567         const char *path, *agent_sender, *agent_path;
 568         DBusMessageIter iter;
 569         DBusMessageIter dict;
 570         struct request_input_reply *l2tp_reply;
 571         int err;
 572
 573         connman_agent_get_info(&agent_sender, &agent_path);
 574
 575         if (provider == NULL || agent_path == NULL || callback == NULL)
 576                 return -ESRCH;
 577
 578         message = dbus_message_new_method_call(agent_sender, agent_path,
 579                                         VPN_AGENT_INTERFACE,
 580                                         "RequestInput");
 581         if (message == NULL)
 582                 return -ENOMEM;
 583
 584         dbus_message_iter_init_append(message, &iter);
 585
 586         path = vpn_provider_get_path(provider);
 587         dbus_message_iter_append_basic(&iter,
 588                                 DBUS_TYPE_OBJECT_PATH, &path);
 589
 590         connman_dbus_dict_open(&iter, &dict);
 591
 592         vpn_agent_append_user_info(&dict, provider, "L2TP.User");
 593
 594         vpn_agent_append_host_and_name(&dict, provider);
 595
 596         connman_dbus_dict_close(&iter, &dict);
 597
 598         l2tp_reply = g_try_new0(struct request_input_reply, 1);
 599         if (l2tp_reply == NULL) {
 600                 dbus_message_unref(message);
 601                 return -ENOMEM;
 602         }
 603
 604         l2tp_reply->provider = provider;
 605         l2tp_reply->callback = callback;
 606         l2tp_reply->user_data = user_data;
 607
 608         err = connman_agent_queue_message(provider, message,
 609                         connman_timeout_input_request(),
 610                         request_input_reply, l2tp_reply);
 611         if (err < 0 && err != -EBUSY) {
 612                 DBG("error %d sending agent request", err);
 613                 dbus_message_unref(message);
 614                 g_free(l2tp_reply);
 615                 return err;
 616         }
 617
 618         dbus_message_unref(message);
 619
 620         return -EINPROGRESS;
 621 }
 622
 623 static int run_connect(struct vpn_provider *provider,
 624                         struct connman_task *task, const char *if_name,
 625                         vpn_provider_connect_cb_t cb, void *user_data,
 626                         const char *username, const char *password)
 627 {
 628         char *l2tp_name, *pppd_name;
 629         int l2tp_fd, pppd_fd;
 630         int err;
 631
 632         if (username == NULL || password == NULL) {
 633                 DBG("Cannot connect username %s password %p",
 634                                                 username, password);
 635                 err = -EINVAL;
 636                 goto done;
 637         }
 638
 639         vpn_provider_set_string(provider, "L2TP.User", username);
 640         vpn_provider_set_string(provider, "L2TP.Password", password);
 641
 642         DBG("username %s password %p", username, password);
 643
 644         l2tp_name = g_strdup_printf("/var/run/connman/connman-xl2tpd.conf");
 645
 646         l2tp_fd = open(l2tp_name, O_RDWR|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);
 647         if (l2tp_fd < 0) {
 648                 g_free(l2tp_name);
 649                 connman_error("Error writing l2tp config");
 650                 err = -EIO;
 651                 goto done;
 652         }
 653
 654         pppd_name = g_strdup_printf("/var/run/connman/connman-ppp-option.conf");
 655
 656         pppd_fd = open(pppd_name, O_RDWR|O_CREAT|O_TRUNC, S_IRUSR|S_IWUSR);
 657         if (pppd_fd < 0) {
 658                 connman_error("Error writing pppd config");
 659                 g_free(l2tp_name);
 660                 g_free(pppd_name);
 661                 close(l2tp_fd);
 662                 err = -EIO;
 663                 goto done;
 664         }
 665
 666         l2tp_write_config(provider, pppd_name, l2tp_fd);
 667
 668         write_pppd_option(provider, pppd_fd);
 669
 670         connman_task_add_argument(task, "-D", NULL);
 671         connman_task_add_argument(task, "-c", l2tp_name);
 672
 673         g_free(l2tp_name);
 674         g_free(pppd_name);
 675
 676         err = connman_task_run(task, l2tp_died, provider,
 677                                 NULL, NULL, NULL);
 678         if (err < 0) {
 679                 connman_error("l2tp failed to start");
 680                 err = -EIO;
 681                 goto done;
 682         }
 683
 684 done:
 685         if (cb != NULL)
 686                 cb(provider, user_data, err);
 687
 688         return err;
 689 }
 690
 691 static void free_private_data(struct l2tp_private_data *data)
 692 {
 693         g_free(data->if_name);
 694         g_free(data);
 695 }
 696
 697 static void request_input_cb(struct vpn_provider *provider,
 698                         const char *username,
 699                         const char *password,
 700                         const char *error, void *user_data)
 701 {
 702         struct l2tp_private_data *data = user_data;
 703
 704         if (username == NULL || password == NULL)
 705                 DBG("Requesting username %s or password failed, error %s",
 706                         username, error);
 707         else if (error != NULL)
 708                 DBG("error %s", error);
 709
 710         run_connect(provider, data->task, data->if_name, data->cb,
 711                 data->user_data, username, password);
 712
 713         free_private_data(data);
 714 }
 715
 716 static int l2tp_connect(struct vpn_provider *provider,
 717                         struct connman_task *task, const char *if_name,
 718                         vpn_provider_connect_cb_t cb, void *user_data)
 719 {
 720         const char *username, *password;
 721         int err;
 722
 723         if (connman_task_set_notify(task, "getsec",
 724                                         l2tp_get_sec, provider) != 0) {
 725                 err = -ENOMEM;
 726                 goto error;
 727         }
 728
 729         username = vpn_provider_get_string(provider, "L2TP.User");
 730         password = vpn_provider_get_string(provider, "L2TP.Password");
 731
 732         DBG("user %s password %p", username, password);
 733
 734         if (username == NULL || password == NULL) {
 735                 struct l2tp_private_data *data;
 736
 737                 data = g_try_new0(struct l2tp_private_data, 1);
 738                 if (data == NULL)
 739                         return -ENOMEM;
 740
 741                 data->task = task;
 742                 data->if_name = g_strdup(if_name);
 743                 data->cb = cb;
 744                 data->user_data = user_data;
 745
 746                 err = request_input(provider, request_input_cb, data);
 747                 if (err != -EINPROGRESS) {
 748                         free_private_data(data);
 749                         goto done;
 750                 }
 751                 return err;
 752         }
 753
 754 done:
 755         return run_connect(provider, task, if_name, cb, user_data,
 756                                                         username, password);
 757
 758 error:
 759         if (cb != NULL)
 760                 cb(provider, user_data, err);
 761
 762         return err;
 763 }
 764
 765 static int l2tp_error_code(int exit_code)
 766 {
 767         switch (exit_code) {
 768         case 1:
 769                 return CONNMAN_PROVIDER_ERROR_CONNECT_FAILED;
 770         default:
 771                 return CONNMAN_PROVIDER_ERROR_UNKNOWN;
 772         }
 773 }
 774
 775 static void l2tp_disconnect(struct vpn_provider *provider)
 776 {
 777         vpn_provider_set_string(provider, "L2TP.Password", NULL);
 778 }
 779
 780 static struct vpn_driver vpn_driver = {
 781         .flags          = VPN_FLAG_NO_TUN,
 782         .notify         = l2tp_notify,
 783         .connect        = l2tp_connect,
 784         .error_code     = l2tp_error_code,
 785         .save           = l2tp_save,
 786         .disconnect     = l2tp_disconnect,
 787 };
 788
 789 static int l2tp_init(void)
 790 {
 791         connection = connman_dbus_get_connection();
 792
 793         return vpn_register("l2tp", &vpn_driver, L2TP);
 794 }
 795
 796 static void l2tp_exit(void)
 797 {
 798         vpn_unregister("l2tp");
 799
 800         dbus_connection_unref(connection);
 801 }
 802
 803 CONNMAN_PLUGIN_DEFINE(l2tp, "l2tp plugin", VERSION,
 804         CONNMAN_PLUGIN_PRIORITY_DEFAULT, l2tp_init, l2tp_exit)