pptp: Add pptp vpn support

Initial revision.

diff --git a/plugins/pptp.c b/plugins/pptp.c
new file mode 100644 (file)
index 0000000..6b2838c
--- /dev/null
+++ b/plugins/pptp.c
@@ -0,0 +1,313 @@
+/*
+ *
+ *  Connection Manager
+ *
+ *  Copyright (C) 2010  BMW Car IT GmbH. All rights reserved.
+ *  Copyright (C) 2011  Intel Corporation. All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License version 2 as
+ *  published by the Free Software Foundation.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+#include <errno.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <net/if.h>
+
+#include <glib.h>
+
+#define CONNMAN_API_SUBJECT_TO_CHANGE
+#include <connman/plugin.h>
+#include <connman/provider.h>
+#include <connman/log.h>
+#include <connman/task.h>
+#include <connman/dbus.h>
+#include <connman/inet.h>
+
+#include "vpn.h"
+
+#define ARRAY_SIZE(a) (sizeof(a)/sizeof(a[0]))
+
+enum {
+       OPT_STRING = 1,
+       OPT_BOOL = 2,
+};
+
+struct {
+       const char *cm_opt;
+       const char *pptp_opt;
+       const char *vpnc_default;
+       int type;
+} pptp_options[] = {
+       { "PPTP.User", "user", NULL, OPT_STRING },
+       { "PPTP.Password", "password", NULL, OPT_STRING },
+       { "PPTP.EchoFailure", "lcp-echo-failure", "0", OPT_STRING },
+       { "PPTP.EchoInterval", "lcp-echo-interval", "0", OPT_STRING },
+       { "PPTP.Debug", "debug", NULL, OPT_STRING },
+       { "PPTP.RefuseEAP", "refuse-eap", NULL, OPT_BOOL },
+       { "PPTP.RefusePAP", "refuse-pap", NULL, OPT_BOOL },
+       { "PPTP.RefuseCHAP", "refuse-chap", NULL, OPT_BOOL },
+       { "PPTP.RefuseMSCHAP", "refuse-mschap", NULL, OPT_BOOL },
+       { "PPTP.RefuseMSCHAP2", "refuse-mschapv2", NULL, OPT_BOOL },
+       { "PPTP.NoBSDComp", "nobsdcomp", NULL, OPT_BOOL },
+       { "PPTP.NoDeflate", "nodeflatey", NULL, OPT_BOOL },
+       { "PPTP.RequirMPPE", "require-mppe", NULL, OPT_BOOL },
+       { "PPTP.RequirMPPE40", "require-mppe-40", NULL, OPT_BOOL },
+       { "PPTP.RequirMPPE128", "require-mppe-128", NULL, OPT_BOOL },
+       { "PPTP.RequirMPPEStateful", "mppe-stateful", NULL, OPT_BOOL },
+       { "PPTP.NoVJ", "no-vj-comp", NULL, OPT_BOOL },
+};
+
+static DBusConnection *connection;
+
+static DBusMessage *pptp_get_sec(struct connman_task *task,
+                               DBusMessage *msg, void *user_data)
+{
+       const char *user, *passwd;
+       struct connman_provider *provider = user_data;
+       DBusMessage *reply;
+
+       if (dbus_message_get_no_reply(msg) == TRUE)
+               return NULL;
+
+       user = connman_provider_get_string(provider, "PPTP.User");
+       passwd = connman_provider_get_string(provider, "PPTP.Password");
+       if (user == NULL || strlen(user) == 0 ||
+                               passwd == NULL || strlen(passwd) == 0)
+               return NULL;
+
+       reply = dbus_message_new_method_return(msg);
+       if (reply == NULL)
+               return NULL;
+
+       dbus_message_append_args(reply, DBUS_TYPE_STRING, &user,
+                               DBUS_TYPE_STRING, &passwd,
+                               DBUS_TYPE_INVALID);
+       return reply;
+}
+
+static int pptp_notify(DBusMessage *msg, struct connman_provider *provider)
+{
+       DBusMessageIter iter, dict;
+       const char *reason, *key, *value;
+       char *addressv4 = NULL, *netmask = NULL, *gateway = NULL;
+       char *ifname = NULL, *nameservers = NULL;
+       struct connman_ipaddress *ipaddress = NULL;
+
+       dbus_message_iter_init(msg, &iter);
+
+       dbus_message_iter_get_basic(&iter, &reason);
+       dbus_message_iter_next(&iter);
+
+       if (provider == NULL) {
+               connman_error("No provider found");
+               return VPN_STATE_FAILURE;
+       }
+
+       if (strcmp(reason, "connect"))
+               return VPN_STATE_DISCONNECT;
+
+       dbus_message_iter_recurse(&iter, &dict);
+
+       while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
+               DBusMessageIter entry;
+
+               dbus_message_iter_recurse(&dict, &entry);
+               dbus_message_iter_get_basic(&entry, &key);
+               dbus_message_iter_next(&entry);
+               dbus_message_iter_get_basic(&entry, &value);
+
+               DBG("%s = %s", key, value);
+
+               if (!strcmp(key, "INTERNAL_IP4_ADDRESS")) {
+                       connman_provider_set_string(provider, "Address", value);
+                       addressv4 = g_strdup(value);
+               }
+
+               if (!strcmp(key, "INTERNAL_IP4_NETMASK")) {
+                       connman_provider_set_string(provider, "Netmask", value);
+                       netmask = g_strdup(value);
+               }
+
+               if (!strcmp(key, "INTERNAL_IP4_DNS")) {
+                       connman_provider_set_string(provider, "DNS", value);
+                       nameservers = g_strdup(value);
+               }
+
+               if (!strcmp(key, "INTERNAL_IFNAME"))
+                       ifname = g_strdup(value);
+
+               dbus_message_iter_next(&dict);
+       }
+
+       if (vpn_set_ifname(provider, ifname) < 0) {
+               g_free(ifname);
+               g_free(addressv4);
+               g_free(netmask);
+               g_free(nameservers);
+               return VPN_STATE_FAILURE;
+       }
+
+       if (addressv4 != NULL)
+               ipaddress = connman_ipaddress_alloc(AF_INET);
+
+       g_free(ifname);
+
+       if (ipaddress == NULL) {
+               connman_error("No IP address for provider");
+               g_free(addressv4);
+               g_free(netmask);
+               g_free(nameservers);
+               return VPN_STATE_FAILURE;
+       }
+
+       value = connman_provider_get_string(provider, "Host");
+       if (value != NULL) {
+               connman_provider_set_string(provider, "Gateway", value);
+               gateway = g_strdup(value);
+       }
+
+       if (addressv4 != NULL)
+               connman_ipaddress_set_ipv4(ipaddress, addressv4, netmask,
+                                       gateway);
+
+       connman_provider_set_ipaddress(provider, ipaddress);
+       connman_provider_set_nameservers(provider, nameservers);
+
+       g_free(addressv4);
+       g_free(netmask);
+       g_free(gateway);
+       g_free(nameservers);
+       connman_ipaddress_free(ipaddress);
+
+       return VPN_STATE_CONNECT;
+}
+
+static void pptp_write_bool_option(struct connman_task *task,
+                               const char *key, const char *value)
+{
+       if (key != NULL && value != NULL) {
+               if (strcmp(value, "yes") == 0)
+                       connman_task_add_argument(task, key, NULL);
+       }
+}
+
+static int pptp_connect(struct connman_provider *provider,
+               struct connman_task *task, const char *if_name)
+{
+       const char *opt_s, *host;
+       char *str;
+       int err, i;
+
+       if (connman_task_set_notify(task, "getsec",
+                                       pptp_get_sec, provider))
+               return -ENOMEM;
+
+       host = connman_provider_get_string(provider, "Host");
+       if (host == NULL) {
+               connman_error("Host not set; cannot enable VPN");
+               return -EINVAL;
+       }
+
+       str = g_strdup_printf("%s %s --nolaunchpppd --loglevel 2",
+                               PPTP, host);
+       if (str == NULL) {
+               connman_error("can not allocate memory");
+               return -ENOMEM;
+       }
+
+       connman_task_add_argument(task, "pty", str);
+       g_free(str);
+
+       connman_task_add_argument(task, "nodetach", NULL);
+       connman_task_add_argument(task, "lock", NULL);
+       connman_task_add_argument(task, "usepeerdns", NULL);
+       connman_task_add_argument(task, "noipdefault", NULL);
+       connman_task_add_argument(task, "noauth", NULL);
+       connman_task_add_argument(task, "nodefaultroute", NULL);
+       connman_task_add_argument(task, "ipparam", "pptp_plugin");
+
+       for (i = 0; i < (int)ARRAY_SIZE(pptp_options); i++) {
+               opt_s = connman_provider_get_string(provider,
+                                       pptp_options[i].cm_opt);
+               if (opt_s == NULL)
+                       opt_s = pptp_options[i].vpnc_default;
+
+               if (opt_s == NULL)
+                       continue;
+
+               if (pptp_options[i].type == OPT_STRING)
+                       connman_task_add_argument(task,
+                                       pptp_options[i].pptp_opt, opt_s);
+               else if (pptp_options[i].type == OPT_BOOL)
+                       pptp_write_bool_option(task,
+                                       pptp_options[i].pptp_opt, opt_s);
+       }
+
+       connman_task_add_argument(task, "plugin",
+                               SCRIPTDIR "/libppp-plugin.so");
+
+       err = connman_task_run(task, vpn_died, provider,
+                               NULL, NULL, NULL);
+       if (err < 0) {
+               connman_error("pptp failed to start");
+               return -EIO;
+       }
+
+       return 0;
+}
+
+static int pptp_error_code(int exit_code)
+{
+
+       switch (exit_code) {
+       case 1:
+               return CONNMAN_PROVIDER_ERROR_CONNECT_FAILED;
+       case 2:
+               return CONNMAN_PROVIDER_ERROR_LOGIN_FAILED;
+       case 16:
+               return CONNMAN_PROVIDER_ERROR_AUTH_FAILED;
+       default:
+               return CONNMAN_PROVIDER_ERROR_UNKNOWN;
+       }
+}
+
+static struct vpn_driver vpn_driver = {
+       .flags          = VPN_FLAG_NO_TUN,
+       .notify         = pptp_notify,
+       .connect        = pptp_connect,
+       .error_code     = pptp_error_code,
+};
+
+static int pptp_init(void)
+{
+       connection = connman_dbus_get_connection();
+
+       return vpn_register("pptp", &vpn_driver, PPPD);
+}
+
+static void pptp_exit(void)
+{
+       vpn_unregister("pptp");
+
+       dbus_connection_unref(connection);
+}
+
+CONNMAN_PLUGIN_DEFINE(pptp, "pptp plugin", VERSION,
+       CONNMAN_PLUGIN_PRIORITY_DEFAULT, pptp_init, pptp_exit)