/
usb_moded-network.c
1306 lines (1141 loc) · 42.3 KB
/
usb_moded-network.c
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/*
* @file usb-moded_network.c : (De)activates network depending on the network setting system.
*
* Copyright (C) 2011 Nokia Corporation. All rights reserved.
* Copyright (C) 2012-2019 Jolla. All rights reserved.
*
* @author: Philippe De Swert <philippe.de-swert@nokia.com>
* @author: Philippe De Swert <philippedeswert@gmail.com>
* @author: Philippe De Swert <philippe.deswert@jollamobile.com>
* @author: Marko Saukko <marko.saukko@jollamobile.com>
* @author: Slava Monich <slava.monich@jolla.com>
* @author: Simo Piiroinen <simo.piiroinen@jollamobile.com>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the Lesser 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 Lesser 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
*/
/*============================================================================= */
#include "usb_moded-network.h"
#include "usb_moded-config-private.h"
#include "usb_moded-control.h"
#include "usb_moded-log.h"
#include "usb_moded-modesetting.h"
#include "usb_moded-worker.h"
#include <sys/stat.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#if CONNMAN || OFONO
# include <dbus/dbus.h>
#endif
/* ========================================================================= *
* Constants
* ========================================================================= */
#define UDHCP_CONFIG_PATH "/run/usb-moded/udhcpd.conf"
#define UDHCP_CONFIG_DIR "/run/usb-moded"
#define UDHCP_CONFIG_LINK "/etc/udhcpd.conf"
/* ========================================================================= *
* Types
* ========================================================================= */
/** IP forwarding configuration block */
typedef struct ipforward_data_t
{
/** Address of primary DNS */
char *dns1;
/** Address of secondary DNS */
char *dns2;
/** Interface from which packets should be forwarded */
char *nat_interface;
}ipforward_data_t;
/* ========================================================================= *
* Prototypes
* ========================================================================= */
/* ------------------------------------------------------------------------- *
* NETWORK
* ------------------------------------------------------------------------- */
static void network_free_ipforward_data (ipforward_data_t *ipforward);
static int network_check_interface (char *interface);
static char *network_get_interface (const modedata_t *data);
static int network_set_usb_ip_forward (const modedata_t *data, ipforward_data_t *ipforward);
static void network_clean_usb_ip_forward(void);
static int network_checklink (void);
static int network_write_udhcpd_conf (ipforward_data_t *ipforward, const modedata_t *data);
int network_set_up_dhcpd (const modedata_t *data);
int network_up (const modedata_t *data);
int network_down (const modedata_t *data);
int network_update (void);
/* ------------------------------------------------------------------------- *
* UTILITY
* ------------------------------------------------------------------------- */
#ifdef OFONO
static int get_roaming (void);
#endif // OFONO
#if CONNMAN_WORKS_BETTER
static int append_variant(DBusMessageIter *iter, const char *property, int type, const char *value);
#endif // CONNMAN_WORKS_BETTER
/* ------------------------------------------------------------------------- *
* CONNMAN
* ------------------------------------------------------------------------- */
static gboolean connman_try_set_tethering (DBusConnection *connection, const char *path, gboolean on);
gboolean connman_set_tethering (const char *path, gboolean on);
static char *connman_parse_manager_reply (DBusMessage *reply, const char *req_service);
static int connman_fill_connection_data(DBusMessage *reply, ipforward_data_t *ipforward);
static int connman_set_cellular_online (DBusConnection *dbus_conn_connman, const char *service, int retry);
static int connman_wifi_power_control (DBusConnection *dbus_conn_connman, int on);
static int connman_get_connection_data (ipforward_data_t *ipforward);
static int connman_reset_state (void);
/* ========================================================================= *
* Data
* ========================================================================= */
static const char default_interface[] = "usb0";
/* ========================================================================= *
* Functions
* ========================================================================= */
static void network_free_ipforward_data (ipforward_data_t *ipforward)
{
LOG_REGISTER_CONTEXT;
if(ipforward)
{
if(ipforward->dns1)
free(ipforward->dns1);
if(ipforward->dns2)
free(ipforward->dns2);
if(ipforward->nat_interface)
free(ipforward->nat_interface);
free(ipforward);
}
}
/* This function checks if the configured interface exists */
static int network_check_interface(char *interface)
{
LOG_REGISTER_CONTEXT;
int ret = -1;
if(interface)
{
char path[256];
snprintf(path, sizeof path, "/sys/class/net/%s", interface);
ret = access(path, F_OK);
}
return ret;
}
static char *network_get_interface(const modedata_t *data)
{
LOG_REGISTER_CONTEXT;
(void)data; // FIXME: why is this passed in the 1st place?
char *interface = 0;
char *setting = config_get_network_setting(NETWORK_INTERFACE_KEY);
if(network_check_interface(setting) == 0)
{
/* Use the configured value */
interface = setting, setting = 0;
}
else
{
/* Fall back to default value */
interface = strdup(default_interface);
if(network_check_interface(interface) != 0)
{
log_warning("Neither configured %s nor fallback %s interface exists."
" Check your config!",
setting ?: "NULL",
interface ?: "NULL");
free(interface), interface = 0;
}
}
log_debug("interface = %s\n", interface ?: "NULL");
free(setting);
return interface;
}
/**
* Turn on ip forwarding on the usb interface
* @return: 0 on success, 1 on failure
*/
static int network_set_usb_ip_forward(const modedata_t *data, ipforward_data_t *ipforward)
{
LOG_REGISTER_CONTEXT;
char *interface, *nat_interface;
char command[128];
interface = network_get_interface(data);
if(interface == NULL)
return 1;
nat_interface = config_get_network_setting(NETWORK_NAT_INTERFACE_KEY);
if((nat_interface == NULL) && (ipforward->nat_interface != NULL))
nat_interface = strdup(ipforward->nat_interface);
else
{
log_debug("No nat interface available!\n");
#ifdef CONNMAN
/* in case the cellular did not come up we want to make sure wifi gets restored */
connman_reset_state();
#endif
free(interface);
free(nat_interface);
return 1;
}
write_to_file("/proc/sys/net/ipv4/ip_forward", "1");
snprintf(command, 128, "/sbin/iptables -t nat -A POSTROUTING -o %s -j MASQUERADE", nat_interface);
common_system(command);
snprintf(command, 128, "/sbin/iptables -A FORWARD -i %s -o %s -m state --state RELATED,ESTABLISHED -j ACCEPT", nat_interface, interface);
common_system(command);
snprintf(command, 128, "/sbin/iptables -A FORWARD -i %s -o %s -j ACCEPT", interface, nat_interface);
common_system(command);
free(interface);
free(nat_interface);
log_debug("ipforwarding success!\n");
return 0;
}
/**
* Remove ip forward
*/
static void network_clean_usb_ip_forward(void)
{
LOG_REGISTER_CONTEXT;
#ifdef CONNMAN
connman_reset_state();
#endif
write_to_file("/proc/sys/net/ipv4/ip_forward", "0");
common_system("/sbin/iptables -F FORWARD");
}
#ifdef OFONO
/**
* Get roaming data from ofono
*
* @return : 1 if roaming, 0 when not (or when ofono is unavailable)
*/
static int get_roaming(void)
{
LOG_REGISTER_CONTEXT;
int ret = 0, type;
DBusError error;
DBusMessage *msg = NULL, *reply;
DBusConnection *dbus_conn_ofono = NULL;
char *modem = NULL;
DBusMessageIter iter, subiter;
dbus_error_init(&error);
if( (dbus_conn_ofono = dbus_bus_get(DBUS_BUS_SYSTEM, &error)) == 0 )
{
log_err("Could not connect to dbus for ofono\n");
}
/* find the modem object path so can find out if it is roaming or not (one modem only is assumed) */
if ((msg = dbus_message_new_method_call("org.ofono", "/", "org.ofono.Manager", "GetModems")) != NULL)
{
if ((reply = dbus_connection_send_with_reply_and_block(dbus_conn_ofono, msg, -1, NULL)) != NULL)
{
dbus_message_iter_init(reply, &iter);
dbus_message_iter_recurse(&iter, &subiter);
iter = subiter;
dbus_message_iter_recurse(&iter, &subiter);
type = dbus_message_iter_get_arg_type(&subiter);
if(type == DBUS_TYPE_OBJECT_PATH)
{
dbus_message_iter_get_basic(&subiter, &modem);
log_debug("modem = %s\n", modem);
}
dbus_message_unref(reply);
}
dbus_message_unref(msg);
}
/* if modem found then we check roaming state */
if(modem != NULL)
{
if ((msg = dbus_message_new_method_call("org.ofono", modem, "org.ofono.NetworkRegistration", "GetProperties")) != NULL)
{
if ((reply = dbus_connection_send_with_reply_and_block(dbus_conn_ofono, msg, -1, NULL)) != NULL)
{
dbus_message_iter_init(reply, &iter);
dbus_message_iter_recurse(&iter, &subiter);
iter = subiter;
dbus_message_iter_recurse(&iter, &subiter);
type = dbus_message_iter_get_arg_type(&subiter);
if(type == DBUS_TYPE_STRING)
{
dbus_message_iter_next (&subiter);
iter = subiter;
dbus_message_iter_recurse(&iter, &subiter);
dbus_message_iter_get_basic(&subiter, &modem);
log_debug("modem status = %s\n", modem);
}
}
dbus_message_unref(reply);
}
dbus_message_unref(msg);
if(!strcmp("roaming", modem))
ret = 1;
}
return ret;
}
#endif
#ifndef CONNMAN
/**
* Read dns settings from /etc/resolv.conf
*/
static int resolv_conf_dns(ipforward_data_t *ipforward)
{
LOG_REGISTER_CONTEXT;
FILE *resolv;
int i = 0, count = 0;
char *line = NULL, **tokens;
size_t len = 0;
ssize_t read;
resolv = fopen("/etc/resolv.conf", "r");
if (resolv == NULL)
return 1;
/* we don't expect more than 10 lines in /etc/resolv.conf */
for (i=0; i < 10; i++)
{
read = getline(&line, &len, resolv);
if(read)
{
if(strstr(line, "nameserver") != NULL)
{
tokens = g_strsplit(line, " ", 2);
if(count == 0)
ipforward->dns1 = strdup(tokens[1]);
else
ipforward->dns2 = strdup(tokens[1]);
count++;
g_strfreev(tokens);
}
}
if(count == 2)
goto end;
}
end:
free(line);
fclose(resolv);
return 0;
}
#endif
static int network_checklink(void)
{
LOG_REGISTER_CONTEXT;
int ret = -1;
char dest[sizeof UDHCP_CONFIG_PATH + 1];
size_t len = readlink(UDHCP_CONFIG_LINK, dest, sizeof dest - 1);
if (len > 0)
{
dest[len] = 0;
ret = strcmp(dest, UDHCP_CONFIG_PATH);
}
return ret;
}
/**
* Write udhcpd.conf
* @ipforward : NULL if we want a simple config, otherwise include dns info etc...
*/
static int network_write_udhcpd_conf(ipforward_data_t *ipforward, const modedata_t *data)
{
LOG_REGISTER_CONTEXT;
FILE *conffile;
char *ip, *interface, *netmask;
char *ipstart, *ipend;
int dot = 0, i = 0, test;
struct stat st;
/* /tmp and /run is often tmpfs, so we avoid writing to flash */
mkdir(UDHCP_CONFIG_DIR, 0664);
conffile = fopen(UDHCP_CONFIG_PATH, "w");
if(conffile == NULL)
{
log_debug("Error creating "UDHCP_CONFIG_PATH"!\n");
return 1;
}
interface = network_get_interface(data);
if(interface == NULL)
{
fclose(conffile);
return 1;
}
/* generate start and end ip based on the setting */
ip = config_get_network_setting(NETWORK_IP_KEY);
ipstart = malloc(15);
ipend = malloc(15);
while(i < 15)
{
if(dot < 3)
{
if(ip[i] == '.')
dot ++;
ipstart[i] = ip[i];
ipend[i] = ip[i];
}
else
{
ipstart[i] = '\0';
ipend[i] = '\0';
break;
}
i++;
}
strcat(ipstart,"1");
strcat(ipend, "15");
netmask = config_get_network_setting(NETWORK_NETMASK_KEY);
/* print all data in the file */
fprintf(conffile, "start\t%s\n", ipstart);
fprintf(conffile, "end\t%s\n", ipend);
fprintf(conffile, "interface\t%s\n", interface);
fprintf(conffile, "option\tsubnet\t%s\n", netmask);
fprintf(conffile, "option\tlease\t3600\n");
fprintf(conffile, "max_leases\t15\n");
if(ipforward != NULL)
{
if(!ipforward->dns1 || !ipforward->dns2)
{
log_debug("No dns info!");
}
else
fprintf(conffile, "opt\tdns\t%s %s\n", ipforward->dns1, ipforward->dns2);
fprintf(conffile, "opt\trouter\t%s\n", ip);
}
free(ipstart);
free(ipend);
free(ip);
free(interface);
free(netmask);
fclose(conffile);
/* check if it is a symlink, if not remove and link, create the link if missing */
test = lstat(UDHCP_CONFIG_LINK, &st);
/* if stat fails there is no file or link */
if(test == -1)
goto link;
/* if it is not a link, or points to the wrong place we remove it */
if(((st.st_mode & S_IFMT) != S_IFLNK) || network_checklink())
{
unlink(UDHCP_CONFIG_LINK);
}
else
goto end;
link:
if (symlink(UDHCP_CONFIG_PATH, UDHCP_CONFIG_LINK) == -1)
{
log_debug("Error creating link "UDHCP_CONFIG_LINK" -> "UDHCP_CONFIG_PATH": %m\n");
unlink(UDHCP_CONFIG_PATH);
return 1;
}
end:
log_debug(UDHCP_CONFIG_LINK" created\n");
return 0;
}
#ifdef CONNMAN
# define CONNMAN_SERVICE "net.connman"
# define CONNMAN_TECH_INTERFACE "net.connman.Technology"
# define CONNMAN_ERROR_INTERFACE CONNMAN_SERVICE ".Error"
# define CONNMAN_ERROR_ALREADY_ENABLED CONNMAN_ERROR_INTERFACE ".AlreadyEnabled"
# define CONNMAN_ERROR_ALREADY_DISABLED CONNMAN_ERROR_INTERFACE ".AlreadyDisabled"
/*
* Configures tethering for the specified connman technology.
*/
static gboolean connman_try_set_tethering(DBusConnection *connection, const char *path, gboolean on)
{
LOG_REGISTER_CONTEXT;
gboolean ok = FALSE;
DBusMessage *message = dbus_message_new_method_call(CONNMAN_SERVICE, path, CONNMAN_TECH_INTERFACE, "SetProperty");
if (message)
{
DBusMessage *reply;
DBusMessageIter iter;
DBusMessageIter iter2;
DBusError error;
const char* key = "Tethering";
dbus_bool_t value = (on != FALSE);
dbus_message_iter_init_append(message, &iter);
dbus_message_iter_append_basic(&iter, DBUS_TYPE_STRING, &key);
dbus_message_iter_open_container(&iter, DBUS_TYPE_VARIANT, DBUS_TYPE_BOOLEAN_AS_STRING, &iter2);
dbus_message_iter_append_basic(&iter2, DBUS_TYPE_BOOLEAN, &value);
dbus_message_iter_close_container(&iter, &iter2);
dbus_error_init(&error);
reply = dbus_connection_send_with_reply_and_block(connection, message, DBUS_TIMEOUT_USE_DEFAULT, &error);
dbus_message_unref(message);
if (reply)
{
log_debug("%s tethering %s", path, on ? "on" : "off");
dbus_message_unref(reply);
ok = TRUE;
}
else
{
if ((on && !g_strcmp0(error.name, CONNMAN_ERROR_ALREADY_ENABLED)) ||
(!on && (!g_strcmp0(error.name, CONNMAN_ERROR_ALREADY_DISABLED) ||
!g_strcmp0(error.name, DBUS_ERROR_UNKNOWN_OBJECT))))
{
ok = TRUE;
}
else
{
log_err("%s\n", error.message);
}
dbus_error_free(&error);
}
}
return ok;
}
gboolean connman_set_tethering(const char *path, gboolean on)
{
LOG_REGISTER_CONTEXT;
gboolean ok = FALSE;
DBusError error;
DBusConnection *connection;
dbus_error_init(&error);
connection = dbus_bus_get(DBUS_BUS_SYSTEM, &error);
if (connection)
{
int i;
for (i=0; i<10; i++)
{
if (i>0)
{
if( !common_msleep(200) )
break;
}
if (connman_try_set_tethering(connection, path, on))
{
ok = TRUE;
break;
}
}
dbus_connection_unref(connection);
}
else
{
log_err("%s\n", error.message);
dbus_error_free (&error);
}
return ok;
}
/**
* Connman message handling
*/
static char * connman_parse_manager_reply(DBusMessage *reply, const char *req_service)
{
LOG_REGISTER_CONTEXT;
DBusMessageIter iter, subiter, origiter;
int type;
char *service;
dbus_message_iter_init(reply, &iter);
type = dbus_message_iter_get_arg_type(&iter);
dbus_message_iter_recurse(&iter, &subiter);
type = dbus_message_iter_get_arg_type(&subiter);
origiter = subiter;
iter = subiter;
while(type != DBUS_TYPE_INVALID)
{
if(type == DBUS_TYPE_STRUCT)
{
origiter = iter;
dbus_message_iter_recurse(&iter, &subiter);
type = dbus_message_iter_get_arg_type(&subiter);
if(type == DBUS_TYPE_OBJECT_PATH)
{
dbus_message_iter_get_basic(&subiter, &service);
log_debug("service = %s\n", service);
if(strstr(service, req_service))
{
log_debug("%s service found!\n", req_service);
return strdup(service);
}
}
}
dbus_message_iter_next(&origiter);
type = dbus_message_iter_get_arg_type(&origiter);
iter = origiter;
}
log_debug("end of list\n");
return 0;
}
static int connman_fill_connection_data(DBusMessage *reply, ipforward_data_t *ipforward)
{
LOG_REGISTER_CONTEXT;
DBusMessageIter array_iter, dict_iter, inside_dict_iter, variant_iter;
DBusMessageIter sub_array_iter, string_iter;
int type, next;
char *string;
log_debug("Filling in dns data\n");
dbus_message_iter_init(reply, &array_iter);
type = dbus_message_iter_get_arg_type(&array_iter);
dbus_message_iter_recurse(&array_iter, &dict_iter);
type = dbus_message_iter_get_arg_type(&dict_iter);
while(type != DBUS_TYPE_INVALID)
{
dbus_message_iter_recurse(&dict_iter, &inside_dict_iter);
type = dbus_message_iter_get_arg_type(&inside_dict_iter);
if(type == DBUS_TYPE_STRING)
{
dbus_message_iter_get_basic(&inside_dict_iter, &string);
//log_debug("string = %s\n", string);
if(!strcmp(string, "Nameservers"))
{
//log_debug("Trying to get Nameservers");
dbus_message_iter_next (&inside_dict_iter);
type = dbus_message_iter_get_arg_type(&inside_dict_iter);
dbus_message_iter_recurse(&inside_dict_iter, &variant_iter);
type = dbus_message_iter_get_arg_type(&variant_iter);
if(type == DBUS_TYPE_ARRAY)
{
dbus_message_iter_recurse(&variant_iter, &string_iter);
type = dbus_message_iter_get_arg_type(&string_iter);
if(type != DBUS_TYPE_STRING)
{
/* not online */
return 1;
}
dbus_message_iter_get_basic(&string_iter, &string);
log_debug("dns = %s\n", string);
ipforward->dns1 = strdup(string);
next = dbus_message_iter_next (&string_iter);
if(!next)
{
log_debug("No secundary dns\n");
/* FIXME: set the same dns for dns2 to avoid breakage */
ipforward->dns2 = strdup(string);
return 0;
}
dbus_message_iter_get_basic(&string_iter, &string);
log_debug("dns2 = %s\n", string);
ipforward->dns2 = strdup(string);
return 0;
}
}
else if(!strcmp(string, "State"))
{
//log_debug("Trying to get online state");
dbus_message_iter_next (&inside_dict_iter);
type = dbus_message_iter_get_arg_type(&inside_dict_iter);
dbus_message_iter_recurse(&inside_dict_iter, &variant_iter);
type = dbus_message_iter_get_arg_type(&variant_iter);
if(type == DBUS_TYPE_STRING)
{
dbus_message_iter_get_basic(&variant_iter, &string);
log_debug("Connection state = %s\n", string);
/* if cellular not online, connect it */
if(strcmp(string, "online"))
{
/* if in ready state connection might be up anyway */
if(strcmp(string, "ready"))
log_debug("Not online. Turning on cellular data connection.\n");
return 1;
}
}
}
else if(!strcmp(string, "Ethernet"))
{
dbus_message_iter_next (&inside_dict_iter);
type = dbus_message_iter_get_arg_type(&inside_dict_iter);
dbus_message_iter_recurse(&inside_dict_iter, &variant_iter);
type = dbus_message_iter_get_arg_type(&variant_iter);
if(type == DBUS_TYPE_ARRAY)
{
dbus_message_iter_recurse(&variant_iter, &sub_array_iter);
/* we want the second dict */
dbus_message_iter_next(&sub_array_iter);
/* we go into the dict and get the string */
dbus_message_iter_recurse(&sub_array_iter, &variant_iter);
type = dbus_message_iter_get_arg_type(&variant_iter);
if(type == DBUS_TYPE_STRING)
{
dbus_message_iter_get_basic(&variant_iter, &string);
if(!strcmp(string, "Interface"))
{
/* get variant and iter down in it */
dbus_message_iter_next(&variant_iter);
dbus_message_iter_recurse(&variant_iter, &string_iter);
dbus_message_iter_get_basic(&string_iter, &string);
log_debug("cellular interface = %s\n", string);
ipforward->nat_interface = strdup(string);
}
}
}
}
}
dbus_message_iter_next (&dict_iter);
type = dbus_message_iter_get_arg_type(&dict_iter);
}
return 0;
}
/**
* Turn on cellular connection if it is not on
*/
static int connman_set_cellular_online(DBusConnection *dbus_conn_connman, const char *service, int retry)
{
LOG_REGISTER_CONTEXT;
DBusMessage *msg = NULL, *reply;
DBusError error;
int ret = 0;
char *wifi = NULL;
dbus_error_init(&error);
if(!retry)
{
if ((msg = dbus_message_new_method_call("net.connman", "/", "net.connman.Manager", "GetServices")) != NULL)
{
if ((reply = dbus_connection_send_with_reply_and_block(dbus_conn_connman, msg, -1, NULL)) != NULL)
{
wifi = connman_parse_manager_reply(reply, "wifi");
dbus_message_unref(reply);
}
dbus_message_unref(msg);
}
if(wifi != NULL)
{
/* we must make sure that wifi is disconnected as sometimes cellular will not come up otherwise */
if ((msg = dbus_message_new_method_call("net.connman", wifi, "net.connman.Service", "Disconnect")) != NULL)
{
/* we don't care for the reply, which is empty anyway if all goes well */
ret = !dbus_connection_send(dbus_conn_connman, msg, NULL);
dbus_connection_flush(dbus_conn_connman);
dbus_message_unref(msg);
}
}
}
if ((msg = dbus_message_new_method_call("net.connman", service, "net.connman.Service", "Connect")) != NULL)
{
/* we don't care for the reply, which is empty anyway if all goes well */
ret = !dbus_connection_send(dbus_conn_connman, msg, NULL);
/* sleep for the connection to come up */
common_sleep(5);
/* make sure the message is sent before cleaning up and closing the connection */
dbus_connection_flush(dbus_conn_connman);
dbus_message_unref(msg);
}
if(wifi)
free(wifi);
return ret;
}
/*
* Turn on or off the wifi service
* wifistatus static variable tracks the state so we do not turn on the wifi if it was off
*
*/
static int connman_wifi_power_control(DBusConnection *dbus_conn_connman, int on)
{
LOG_REGISTER_CONTEXT;
static int wifistatus = 0;
int type = 0;
char *string;
DBusMessage *msg = NULL, *reply;
//DBusError error;
DBusMessageIter array_iter, dict_iter, inside_dict_iter, variant_iter;
if(!on)
{
/* check wifi status only before turning off */
if ((msg = dbus_message_new_method_call("net.connman", "/net/connman/technology/wifi", "net.connman.Technology", "GetProperties")) != NULL)
{
if ((reply = dbus_connection_send_with_reply_and_block(dbus_conn_connman, msg, -1, NULL)) != NULL)
{
dbus_message_iter_init(reply, &array_iter);
dbus_message_iter_recurse(&array_iter, &dict_iter);
type = dbus_message_iter_get_arg_type(&dict_iter);
while(type != DBUS_TYPE_INVALID)
{
dbus_message_iter_recurse(&dict_iter, &inside_dict_iter);
type = dbus_message_iter_get_arg_type(&inside_dict_iter);
if(type == DBUS_TYPE_STRING)
{
dbus_message_iter_get_basic(&inside_dict_iter, &string);
log_debug("string = %s\n", string);
if(!strcmp(string, "Powered"))
{
dbus_message_iter_next (&inside_dict_iter);
type = dbus_message_iter_get_arg_type(&inside_dict_iter);
dbus_message_iter_recurse(&inside_dict_iter, &variant_iter);
type = dbus_message_iter_get_arg_type(&variant_iter);
if(type == DBUS_TYPE_BOOLEAN)
{
dbus_message_iter_get_basic(&variant_iter, &wifistatus);
log_debug("Powered state = %d\n", wifistatus);
}
break;
}
}
dbus_message_iter_next (&dict_iter);
type = dbus_message_iter_get_arg_type(&dict_iter);
}
dbus_message_unref(reply);
}
dbus_message_unref(msg);
}
}
/* /net/connman/technology/wifi net.connman.Technology.SetProperty string:Powered variant:boolean:false */
if(wifistatus && !on)
common_system("/bin/dbus-send --print-reply --type=method_call --system --dest=net.connman /net/connman/technology/wifi net.connman.Technology.SetProperty string:Powered variant:boolean:false");
if(wifistatus && on)
/* turn on wifi after tethering is over and wifi was on before */
common_system("/bin/dbus-send --print-reply --type=method_call --system --dest=net.connman /net/connman/technology/wifi net.connman.Technology.SetProperty string:Powered variant:boolean:true");
return 0;
}
static int connman_get_connection_data(ipforward_data_t *ipforward)
{
LOG_REGISTER_CONTEXT;
DBusConnection *dbus_conn_connman = NULL;
DBusMessage *msg = NULL, *reply = NULL;
DBusError error;
char *service = NULL;
int online = 0, ret = 0;
dbus_error_init(&error);
if( (dbus_conn_connman = dbus_bus_get(DBUS_BUS_SYSTEM, &error)) == 0 )
{
log_err("Could not connect to dbus for connman\n");
}
/* turn off wifi in preparation for cellular connection if needed */
connman_wifi_power_control(dbus_conn_connman, 0);
/* get list of services so we can find out which one is the cellular */
if ((msg = dbus_message_new_method_call("net.connman", "/", "net.connman.Manager", "GetServices")) != NULL)
{
if ((reply = dbus_connection_send_with_reply_and_block(dbus_conn_connman, msg, -1, NULL)) != NULL)
{
service = connman_parse_manager_reply(reply, "cellular");
dbus_message_unref(reply);
}
dbus_message_unref(msg);
}
log_debug("service = %s\n", service);
if(service)
{
try_again:
if ((msg = dbus_message_new_method_call("net.connman", service, "net.connman.Service", "GetProperties")) != NULL)
{
if ((reply = dbus_connection_send_with_reply_and_block(dbus_conn_connman, msg, -1, NULL)) != NULL)
{
if(connman_fill_connection_data(reply, ipforward))
{
if(!connman_set_cellular_online(dbus_conn_connman, service, online) && !online)
{
online = 1;
goto try_again;
}
else
{
log_debug("Cannot connect to cellular data\n");
ret = 1;
}
}
dbus_message_unref(reply);
}
dbus_message_unref(msg);
}
}
dbus_connection_unref(dbus_conn_connman);
dbus_error_free(&error);
free(service);
return ret;
}
static int connman_reset_state(void)
{
LOG_REGISTER_CONTEXT;
DBusConnection *dbus_conn_connman = NULL;
DBusError error;
dbus_error_init(&error);
if( (dbus_conn_connman = dbus_bus_get(DBUS_BUS_SYSTEM, &error)) == 0 )
{
log_err("Could not connect to dbus for connman\n");
}
/* make sure connman turns wifi back on when we disconnect */
log_debug("Turning wifi back on\n");
connman_wifi_power_control(dbus_conn_connman, 1);
dbus_connection_unref(dbus_conn_connman);
dbus_error_free(&error);
return 0;
}
#endif /* CONNMAN */
/**
* Write out /etc/udhcpd.conf conf so the config is available when it gets started
*/
int network_set_up_dhcpd(const modedata_t *data)
{
LOG_REGISTER_CONTEXT;
ipforward_data_t *ipforward = NULL;
int ret = 1;
/* Set up nat info only if it is required */
if(data->nat)
{
#ifdef OFONO
/* check if we are roaming or not */
if(get_roaming())
{
/* get permission to use roaming */
if(config_is_roaming_not_allowed())
goto end;
}
#endif /* OFONO */
ipforward = calloc(1, sizeof *ipforward);
#ifdef CONNMAN
if(connman_get_connection_data(ipforward))
{
log_debug("data connection not available!\n");
/* TODO: send a message to the UI */
goto end;
}
#else
if(resolv_conf_dns(ipforward))
goto end;
#endif /*CONNMAN */
}
/* ipforward can be NULL here, which is expected and handled in this function */
ret = network_write_udhcpd_conf(ipforward, data);