blob: 9f2a214ddceca866bed55eb6d197da6ad168143d [file] [log] [blame]
/*
*
* ConnMan VPN daemon
*
* Copyright (C) 2010,2013-2014 BMW Car IT GmbH.
* Copyright (C) 2012-2013 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 <dbus/dbus.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 <connman/agent.h>
#include <connman/setting.h>
#include <connman/vpn-dbus.h>
#include "../vpn-provider.h"
#include "../vpn-agent.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 },
{ "PPPD.EchoFailure", "lcp-echo-failure", "0", OPT_STRING },
{ "PPPD.EchoInterval", "lcp-echo-interval", "0", OPT_STRING },
{ "PPPD.Debug", "debug", NULL, OPT_STRING },
{ "PPPD.RefuseEAP", "refuse-eap", NULL, OPT_BOOL },
{ "PPPD.RefusePAP", "refuse-pap", NULL, OPT_BOOL },
{ "PPPD.RefuseCHAP", "refuse-chap", NULL, OPT_BOOL },
{ "PPPD.RefuseMSCHAP", "refuse-mschap", NULL, OPT_BOOL },
{ "PPPD.RefuseMSCHAP2", "refuse-mschapv2", NULL, OPT_BOOL },
{ "PPPD.NoBSDComp", "nobsdcomp", NULL, OPT_BOOL },
{ "PPPD.NoDeflate", "nodeflate", NULL, OPT_BOOL },
{ "PPPD.RequirMPPE", "require-mppe", NULL, OPT_BOOL },
{ "PPPD.RequirMPPE40", "require-mppe-40", NULL, OPT_BOOL },
{ "PPPD.RequirMPPE128", "require-mppe-128", NULL, OPT_BOOL },
{ "PPPD.RequirMPPEStateful", "mppe-stateful", NULL, OPT_BOOL },
{ "PPPD.NoVJ", "no-vj-comp", NULL, OPT_BOOL },
};
static DBusConnection *connection;
struct pptp_private_data {
struct connman_task *task;
char *if_name;
vpn_provider_connect_cb_t cb;
void *user_data;
};
static DBusMessage *pptp_get_sec(struct connman_task *task,
DBusMessage *msg, void *user_data)
{
const char *user, *passwd;
struct vpn_provider *provider = user_data;
DBusMessage *reply;
if (dbus_message_get_no_reply(msg))
return NULL;
user = vpn_provider_get_string(provider, "PPTP.User");
passwd = vpn_provider_get_string(provider, "PPTP.Password");
if (!user || strlen(user) == 0 ||
!passwd || strlen(passwd) == 0)
return NULL;
reply = dbus_message_new_method_return(msg);
if (!reply)
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 vpn_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) {
connman_error("No provider found");
return VPN_STATE_FAILURE;
}
if (strcmp(reason, "auth failed") == 0) {
DBG("authentication failure");
vpn_provider_set_string(provider, "PPTP.User", NULL);
vpn_provider_set_string(provider, "PPTP.Password", NULL);
return VPN_STATE_AUTH_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"))
addressv4 = g_strdup(value);
if (!strcmp(key, "INTERNAL_IP4_NETMASK"))
netmask = g_strdup(value);
if (!strcmp(key, "INTERNAL_IP4_DNS"))
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)
ipaddress = connman_ipaddress_alloc(AF_INET);
g_free(ifname);
if (!ipaddress) {
connman_error("No IP address for provider");
g_free(addressv4);
g_free(netmask);
g_free(nameservers);
return VPN_STATE_FAILURE;
}
value = vpn_provider_get_string(provider, "HostIP");
if (value) {
vpn_provider_set_string(provider, "Gateway", value);
gateway = g_strdup(value);
}
if (addressv4)
connman_ipaddress_set_ipv4(ipaddress, addressv4, netmask,
gateway);
vpn_provider_set_ipaddress(provider, ipaddress);
vpn_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 int pptp_save(struct vpn_provider *provider, GKeyFile *keyfile)
{
const char *option;
bool pptp_option, pppd_option;
int i;
for (i = 0; i < (int)ARRAY_SIZE(pptp_options); i++) {
pptp_option = pppd_option = false;
if (strncmp(pptp_options[i].cm_opt, "PPTP.", 5) == 0)
pptp_option = true;
if (strncmp(pptp_options[i].cm_opt, "PPPD.", 5) == 0)
pppd_option = true;
if (pptp_option || pppd_option) {
option = vpn_provider_get_string(provider,
pptp_options[i].cm_opt);
if (!option) {
/*
* Check if the option prefix is PPTP as the
* PPPD options were using PPTP prefix earlier.
*/
char *pptp_str;
if (!pppd_option)
continue;
pptp_str = g_strdup_printf("PPTP.%s",
&pptp_options[i].cm_opt[5]);
option = vpn_provider_get_string(provider,
pptp_str);
g_free(pptp_str);
if (!option)
continue;
}
g_key_file_set_string(keyfile,
vpn_provider_get_save_group(provider),
pptp_options[i].cm_opt, option);
}
}
return 0;
}
static void pptp_write_bool_option(struct connman_task *task,
const char *key, const char *value)
{
if (key && value) {
if (strcasecmp(value, "yes") == 0 ||
strcasecmp(value, "true") == 0 ||
strcmp(value, "1") == 0)
connman_task_add_argument(task, key, NULL);
}
}
struct request_input_reply {
struct vpn_provider *provider;
vpn_provider_password_cb_t callback;
void *user_data;
};
static void request_input_reply(DBusMessage *reply, void *user_data)
{
struct request_input_reply *pptp_reply = user_data;
const char *error = NULL;
char *username = NULL, *password = NULL;
char *key;
DBusMessageIter iter, dict;
DBG("provider %p", pptp_reply->provider);
if (dbus_message_get_type(reply) == DBUS_MESSAGE_TYPE_ERROR) {
error = dbus_message_get_error_name(reply);
goto done;
}
if (!vpn_agent_check_reply_has_dict(reply))
goto done;
dbus_message_iter_init(reply, &iter);
dbus_message_iter_recurse(&iter, &dict);
while (dbus_message_iter_get_arg_type(&dict) == DBUS_TYPE_DICT_ENTRY) {
DBusMessageIter entry, value;
const char *str;
dbus_message_iter_recurse(&dict, &entry);
if (dbus_message_iter_get_arg_type(&entry) != DBUS_TYPE_STRING)
break;
dbus_message_iter_get_basic(&entry, &key);
if (g_str_equal(key, "Username")) {
dbus_message_iter_next(&entry);
if (dbus_message_iter_get_arg_type(&entry)
!= DBUS_TYPE_VARIANT)
break;
dbus_message_iter_recurse(&entry, &value);
if (dbus_message_iter_get_arg_type(&value)
!= DBUS_TYPE_STRING)
break;
dbus_message_iter_get_basic(&value, &str);
username = g_strdup(str);
}
if (g_str_equal(key, "Password")) {
dbus_message_iter_next(&entry);
if (dbus_message_iter_get_arg_type(&entry)
!= DBUS_TYPE_VARIANT)
break;
dbus_message_iter_recurse(&entry, &value);
if (dbus_message_iter_get_arg_type(&value)
!= DBUS_TYPE_STRING)
break;
dbus_message_iter_get_basic(&value, &str);
password = g_strdup(str);
}
dbus_message_iter_next(&dict);
}
done:
pptp_reply->callback(pptp_reply->provider, username, password, error,
pptp_reply->user_data);
g_free(username);
g_free(password);
g_free(pptp_reply);
}
typedef void (* request_cb_t)(struct vpn_provider *provider,
const char *username, const char *password,
const char *error, void *user_data);
static int request_input(struct vpn_provider *provider,
request_cb_t callback, const char *dbus_sender,
void *user_data)
{
DBusMessage *message;
const char *path, *agent_sender, *agent_path;
DBusMessageIter iter;
DBusMessageIter dict;
struct request_input_reply *pptp_reply;
int err;
void *agent;
agent = connman_agent_get_info(dbus_sender, &agent_sender,
&agent_path);
if (!provider || !agent || !agent_path || !callback)
return -ESRCH;
message = dbus_message_new_method_call(agent_sender, agent_path,
VPN_AGENT_INTERFACE,
"RequestInput");
if (!message)
return -ENOMEM;
dbus_message_iter_init_append(message, &iter);
path = vpn_provider_get_path(provider);
dbus_message_iter_append_basic(&iter,
DBUS_TYPE_OBJECT_PATH, &path);
connman_dbus_dict_open(&iter, &dict);
vpn_agent_append_user_info(&dict, provider, "PPTP.User");
vpn_agent_append_host_and_name(&dict, provider);
connman_dbus_dict_close(&iter, &dict);
pptp_reply = g_try_new0(struct request_input_reply, 1);
if (!pptp_reply) {
dbus_message_unref(message);
return -ENOMEM;
}
pptp_reply->provider = provider;
pptp_reply->callback = callback;
pptp_reply->user_data = user_data;
err = connman_agent_queue_message(provider, message,
connman_timeout_input_request(),
request_input_reply, pptp_reply, agent);
if (err < 0 && err != -EBUSY) {
DBG("error %d sending agent request", err);
dbus_message_unref(message);
g_free(pptp_reply);
return err;
}
dbus_message_unref(message);
return -EINPROGRESS;
}
static int run_connect(struct vpn_provider *provider,
struct connman_task *task, const char *if_name,
vpn_provider_connect_cb_t cb, void *user_data,
const char *username, const char *password)
{
const char *opt_s, *host;
char *str;
int err, i;
host = vpn_provider_get_string(provider, "Host");
if (!host) {
connman_error("Host not set; cannot enable VPN");
err = -EINVAL;
goto done;
}
if (!username || !password) {
DBG("Cannot connect username %s password %p",
username, password);
err = -EINVAL;
goto done;
}
DBG("username %s password %p", username, password);
str = g_strdup_printf("%s %s --nolaunchpppd --loglevel 2",
PPTP, host);
if (!str) {
connman_error("can not allocate memory");
err = -ENOMEM;
goto done;
}
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 = vpn_provider_get_string(provider,
pptp_options[i].cm_opt);
if (!opt_s)
opt_s = pptp_options[i].vpnc_default;
if (!opt_s)
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");
err = -EIO;
goto done;
}
done:
if (cb)
cb(provider, user_data, err);
return err;
}
static void free_private_data(struct pptp_private_data *data)
{
g_free(data->if_name);
g_free(data);
}
static void request_input_cb(struct vpn_provider *provider,
const char *username,
const char *password,
const char *error, void *user_data)
{
struct pptp_private_data *data = user_data;
if (!username || !password)
DBG("Requesting username %s or password failed, error %s",
username, error);
else if (error)
DBG("error %s", error);
vpn_provider_set_string(provider, "PPTP.User", username);
vpn_provider_set_string_hide_value(provider, "PPTP.Password",
password);
run_connect(provider, data->task, data->if_name, data->cb,
data->user_data, username, password);
free_private_data(data);
}
static int pptp_connect(struct vpn_provider *provider,
struct connman_task *task, const char *if_name,
vpn_provider_connect_cb_t cb, const char *dbus_sender,
void *user_data)
{
const char *username, *password;
int err;
DBG("iface %s provider %p user %p", if_name, provider, user_data);
if (connman_task_set_notify(task, "getsec",
pptp_get_sec, provider)) {
err = -ENOMEM;
goto error;
}
username = vpn_provider_get_string(provider, "PPTP.User");
password = vpn_provider_get_string(provider, "PPTP.Password");
DBG("user %s password %p", username, password);
if (!username || !password) {
struct pptp_private_data *data;
data = g_try_new0(struct pptp_private_data, 1);
if (!data)
return -ENOMEM;
data->task = task;
data->if_name = g_strdup(if_name);
data->cb = cb;
data->user_data = user_data;
err = request_input(provider, request_input_cb, dbus_sender,
data);
if (err != -EINPROGRESS) {
free_private_data(data);
goto done;
}
return err;
}
done:
return run_connect(provider, task, if_name, cb, user_data,
username, password);
error:
if (cb)
cb(provider, user_data, err);
return err;
}
static int pptp_error_code(struct vpn_provider *provider, 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 void pptp_disconnect(struct vpn_provider *provider)
{
vpn_provider_set_string(provider, "PPTP.Password", NULL);
}
static struct vpn_driver vpn_driver = {
.flags = VPN_FLAG_NO_TUN,
.notify = pptp_notify,
.connect = pptp_connect,
.error_code = pptp_error_code,
.save = pptp_save,
.disconnect = pptp_disconnect,
};
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)