*
* Connection Manager
*
- * Copyright (C) 2007-2010 Intel Corporation. All rights reserved.
+ * Copyright (C) 2007-2012 Intel Corporation. All rights reserved.
* Copyright (C) 2011 ProFUSION embedded systems
*
* This program is free software; you can redistribute it and/or modify
#include <config.h>
#endif
+#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <gdbus.h>
+#ifndef DBUS_TYPE_UNIX_FD
+#define DBUS_TYPE_UNIX_FD -1
+#endif
+
#define BRIDGE_PROC_DIR "/proc/sys/net/bridge"
#define BRIDGE_NAME "tether"
-#define BRIDGE_IP "192.168.218.1"
-#define BRIDGE_BCAST "192.168.218.255"
-#define BRIDGE_SUBNET "255.255.255.0"
-#define BRIDGE_IP_START "192.168.218.100"
-#define BRIDGE_IP_END "192.168.218.200"
#define BRIDGE_DNS "8.8.8.8"
#define DEFAULT_MTU 1500
-#define PRIVATE_NETWORK_IP "192.168.219.1"
-#define PRIVATE_NETWORK_PEER_IP "192.168.219.2"
-#define PRIVATE_NETWORK_NETMASK "255.255.255.0"
#define PRIVATE_NETWORK_PRIMARY_DNS BRIDGE_DNS
#define PRIVATE_NETWORK_SECONDARY_DNS "8.8.4.4"
-static char *default_interface = NULL;
-static volatile gint tethering_enabled;
+static volatile int tethering_enabled;
static GDHCPServer *tethering_dhcp_server = NULL;
+static struct connman_ippool *dhcp_ippool = NULL;
static DBusConnection *connection;
static GHashTable *pn_hash;
struct connman_private_network {
char *owner;
+ char *path;
guint watch;
DBusMessage *msg;
DBusMessage *reply;
char *interface;
int index;
guint iface_watch;
- const char *server_ip;
- const char *peer_ip;
+ struct connman_ippool *pool;
const char *primary_dns;
const char *secondary_dns;
};
g_dhcp_server_unref(server);
}
-static int set_forward_delay(const char *name, unsigned int delay)
-{
- FILE *f;
- char *forward_delay_path;
-
- forward_delay_path =
- g_strdup_printf("/sys/class/net/%s/bridge/forward_delay", name);
-
- if (forward_delay_path == NULL)
- return -ENOMEM;
-
- f = fopen(forward_delay_path, "r+");
-
- g_free(forward_delay_path);
-
- if (f == NULL)
- return -errno;
-
- fprintf(f, "%d", delay);
-
- fclose(f);
-
- return 0;
-}
-
-static int create_bridge(const char *name)
-{
- int sk, err;
-
- DBG("name %s", name);
-
- sk = socket(AF_INET, SOCK_STREAM, 0);
- if (sk < 0)
- return -EOPNOTSUPP;
-
- err = ioctl(sk, SIOCBRADDBR, name);
-
- if (err < 0)
- return -EOPNOTSUPP;
-
- err = set_forward_delay(name, 0);
-
- if (err < 0)
- ioctl(sk, SIOCBRDELBR, name);
-
- close(sk);
-
- return err;
-}
-
-static int remove_bridge(const char *name)
-{
- int sk, err;
-
- DBG("name %s", name);
-
- sk = socket(AF_INET, SOCK_STREAM, 0);
- if (sk < 0)
- return -EOPNOTSUPP;
-
- err = ioctl(sk, SIOCBRDELBR, name);
-
- close(sk);
-
- if (err < 0)
- return -EOPNOTSUPP;
-
- return 0;
-}
-
-static int enable_bridge(const char *name)
+static void tethering_restart(struct connman_ippool *pool, void *user_data)
{
- int err, index;
-
- index = connman_inet_ifindex(name);
- if (index < 0)
- return index;
-
- err = __connman_inet_modify_address(RTM_NEWADDR,
- NLM_F_REPLACE | NLM_F_ACK, index, AF_INET,
- BRIDGE_IP, NULL, 24, BRIDGE_BCAST);
- if (err < 0)
- return err;
-
- return connman_inet_ifup(index);
+ __connman_tethering_set_disabled();
+ __connman_tethering_set_enabled();
}
-static int disable_bridge(const char *name)
+void __connman_tethering_set_enabled(void)
{
int index;
-
- index = connman_inet_ifindex(name);
- if (index < 0)
- return index;
-
- return connman_inet_ifdown(index);
-}
-
-static int enable_ip_forward(connman_bool_t enable)
-{
-
- FILE *f;
-
- f = fopen("/proc/sys/net/ipv4/ip_forward", "r+");
- if (f == NULL)
- return -errno;
-
- if (enable == TRUE)
- fprintf(f, "1");
- else
- fprintf(f, "0");
-
- fclose(f);
-
- return 0;
-}
-
-static int enable_nat(const char *interface)
-{
int err;
+ const char *gateway;
+ const char *broadcast;
+ const char *subnet_mask;
+ const char *start_ip;
+ const char *end_ip;
+ const char *dns;
+ unsigned char prefixlen;
- if (interface == NULL)
- return 0;
-
- /* Enable IPv4 forwarding */
- err = enable_ip_forward(TRUE);
- if (err < 0)
- return err;
+ DBG("enabled %d", tethering_enabled + 1);
- /* POSTROUTING flush */
- err = __connman_iptables_command("-t nat -F POSTROUTING");
- if (err < 0)
- return err;
+ if (__sync_fetch_and_add(&tethering_enabled, 1) != 0)
+ return;
- /* Enable masquerading */
- err = __connman_iptables_command("-t nat -A POSTROUTING "
- "-o %s -j MASQUERADE", interface);
+ err = __connman_bridge_create(BRIDGE_NAME);
if (err < 0)
- return err;
-
- return __connman_iptables_commit("nat");
-}
+ return;
-static void disable_nat(const char *interface)
-{
- int err;
+ index = connman_inet_ifindex(BRIDGE_NAME);
+ dhcp_ippool = __connman_ippool_create(index, 2, 252,
+ tethering_restart, NULL);
+ if (dhcp_ippool == NULL) {
+ connman_error("Fail to create IP pool");
+ return;
+ }
- /* Disable IPv4 forwarding */
- enable_ip_forward(FALSE);
+ gateway = __connman_ippool_get_gateway(dhcp_ippool);
+ broadcast = __connman_ippool_get_broadcast(dhcp_ippool);
+ subnet_mask = __connman_ippool_get_subnet_mask(dhcp_ippool);
+ start_ip = __connman_ippool_get_start_ip(dhcp_ippool);
+ end_ip = __connman_ippool_get_end_ip(dhcp_ippool);
- /* POSTROUTING flush */
- err = __connman_iptables_command("-t nat -F POSTROUTING");
- if (err < 0)
+ err = __connman_bridge_enable(BRIDGE_NAME, gateway, broadcast);
+ if (err < 0 && err != -EALREADY) {
+ __connman_bridge_remove(BRIDGE_NAME);
return;
+ }
- __connman_iptables_commit("nat");
-}
+ dns = gateway;
+ if (__connman_dnsproxy_add_listener(BRIDGE_NAME) < 0) {
+ connman_error("Can't add listener %s to DNS proxy",
+ BRIDGE_NAME);
+ dns = BRIDGE_DNS;
+ }
-void __connman_tethering_set_enabled(void)
-{
- int err;
+ tethering_dhcp_server = dhcp_server_start(BRIDGE_NAME,
+ gateway, subnet_mask,
+ start_ip, end_ip,
+ 24 * 3600, dns);
+ if (tethering_dhcp_server == NULL) {
+ __connman_bridge_disable(BRIDGE_NAME);
+ __connman_bridge_remove(BRIDGE_NAME);
+ return;
+ }
- DBG("enabled %d", tethering_enabled + 1);
+ prefixlen =
+ __connman_ipconfig_netmask_prefix_len(subnet_mask);
+ __connman_nat_enable(BRIDGE_NAME, start_ip, prefixlen);
- if (g_atomic_int_exchange_and_add(&tethering_enabled, 1) == 0) {
- err = create_bridge(BRIDGE_NAME);
- if (err < 0)
- return;
-
- err = enable_bridge(BRIDGE_NAME);
- if (err < 0) {
- remove_bridge(BRIDGE_NAME);
- return;
- }
-
- tethering_dhcp_server =
- dhcp_server_start(BRIDGE_NAME,
- BRIDGE_IP, BRIDGE_SUBNET,
- BRIDGE_IP_START, BRIDGE_IP_END,
- 24 * 3600, BRIDGE_DNS);
- if (tethering_dhcp_server == NULL) {
- disable_bridge(BRIDGE_NAME);
- remove_bridge(BRIDGE_NAME);
- return;
- }
-
- enable_nat(default_interface);
-
- DBG("tethering started");
- }
+ DBG("tethering started");
}
void __connman_tethering_set_disabled(void)
{
DBG("enabled %d", tethering_enabled - 1);
- if (g_atomic_int_dec_and_test(&tethering_enabled) == TRUE) {
- disable_nat(default_interface);
-
- dhcp_server_stop(tethering_dhcp_server);
+ __connman_dnsproxy_remove_listener(BRIDGE_NAME);
- disable_bridge(BRIDGE_NAME);
-
- remove_bridge(BRIDGE_NAME);
-
- DBG("tethering stopped");
- }
-}
+ if (__sync_fetch_and_sub(&tethering_enabled, 1) != 1)
+ return;
-void __connman_tethering_update_interface(const char *interface)
-{
- DBG("interface %s", interface);
+ __connman_nat_disable(BRIDGE_NAME);
- g_free(default_interface);
+ dhcp_server_stop(tethering_dhcp_server);
- if (interface == NULL) {
- disable_nat(interface);
- default_interface = NULL;
+ tethering_dhcp_server = NULL;
- return;
- }
+ __connman_bridge_disable(BRIDGE_NAME);
- default_interface = g_strdup(interface);
+ __connman_ippool_unref(dhcp_ippool);
- if (!g_atomic_int_get(&tethering_enabled))
- return;
+ __connman_bridge_remove(BRIDGE_NAME);
- enable_nat(interface);
+ DBG("tethering stopped");
}
static void setup_tun_interface(unsigned int flags, unsigned change,
{
struct connman_private_network *pn = data;
unsigned char prefixlen;
- DBusMessage *reply;
DBusMessageIter array, dict;
+ const char *server_ip;
+ const char *peer_ip;
+ const char *subnet_mask;
int err;
DBG("index %d flags %d change %d", pn->index, flags, change);
if (flags & IFF_UP)
return;
+ subnet_mask = __connman_ippool_get_subnet_mask(pn->pool);
+ server_ip = __connman_ippool_get_start_ip(pn->pool);
+ peer_ip = __connman_ippool_get_end_ip(pn->pool);
prefixlen =
- __connman_ipconfig_netmask_prefix_len(PRIVATE_NETWORK_NETMASK);
+ __connman_ipconfig_netmask_prefix_len(subnet_mask);
if ((__connman_inet_modify_address(RTM_NEWADDR,
NLM_F_REPLACE | NLM_F_ACK, pn->index, AF_INET,
- pn->server_ip, pn->peer_ip,
- prefixlen, NULL)) < 0) {
+ server_ip, peer_ip, prefixlen, NULL)) < 0) {
DBG("address setting failed");
return;
}
connman_inet_ifup(pn->index);
- err = enable_nat(default_interface);
+ err = __connman_nat_enable(BRIDGE_NAME, server_ip, prefixlen);
if (err < 0) {
- connman_error("failed to enable NAT on %s", default_interface);
+ connman_error("failed to enable NAT");
goto error;
}
- reply = dbus_message_new_method_return(pn->msg);
+ dbus_message_iter_init_append(pn->reply, &array);
- if (reply == NULL)
- goto error;
-
- dbus_message_iter_init_append(reply, &array);
-
- dbus_message_iter_append_basic(&array, DBUS_TYPE_UNIX_FD, &pn->fd);
+ dbus_message_iter_append_basic(&array, DBUS_TYPE_OBJECT_PATH,
+ &pn->path);
connman_dbus_dict_open(&array, &dict);
connman_dbus_dict_append_basic(&dict, "ServerIPv4",
- DBUS_TYPE_STRING, &pn->server_ip);
+ DBUS_TYPE_STRING, &server_ip);
connman_dbus_dict_append_basic(&dict, "PeerIPv4",
- DBUS_TYPE_STRING, &pn->peer_ip);
+ DBUS_TYPE_STRING, &peer_ip);
connman_dbus_dict_append_basic(&dict, "PrimaryDNS",
- DBUS_TYPE_STRING, &pn->primary_dns);
+ DBUS_TYPE_STRING, &pn->primary_dns);
connman_dbus_dict_append_basic(&dict, "SecondaryDNS",
- DBUS_TYPE_STRING, &pn->secondary_dns);
+ DBUS_TYPE_STRING, &pn->secondary_dns);
connman_dbus_dict_close(&array, &dict);
- g_dbus_send_message(connection, reply);
+ dbus_message_iter_append_basic(&array, DBUS_TYPE_UNIX_FD, &pn->fd);
+
+ g_dbus_send_message(connection, pn->reply);
return;
error:
- reply = __connman_error_failed(pn->msg, -err);
- g_dbus_send_message(connection, reply);
+ pn->reply = __connman_error_failed(pn->msg, -err);
+ g_dbus_send_message(connection, pn->reply);
- g_hash_table_remove(pn_hash, pn->owner);
+ g_hash_table_remove(pn_hash, pn->path);
}
static void remove_private_network(gpointer user_data)
{
struct connman_private_network *pn = user_data;
- close(pn->fd);
-
+ __connman_nat_disable(BRIDGE_NAME);
connman_rtnl_remove_watch(pn->iface_watch);
-
- disable_nat(default_interface);
+ __connman_ippool_unref(pn->pool);
if (pn->watch > 0) {
g_dbus_remove_watch(connection, pn->watch);
pn->watch = 0;
}
+ close(pn->fd);
+
g_free(pn->interface);
g_free(pn->owner);
+ g_free(pn->path);
g_free(pn);
}
pn->watch = 0;
- g_hash_table_remove(pn_hash, pn->owner);
+ g_hash_table_remove(pn_hash, pn->path);
+}
+
+static void ippool_disconnect(struct connman_ippool *pool, void *user_data)
+{
+ struct connman_private_network *pn = user_data;
+
+ DBG("block used externally");
+
+ g_hash_table_remove(pn_hash, pn->path);
}
int __connman_private_network_request(DBusMessage *msg, const char *owner)
{
struct connman_private_network *pn;
char *iface = NULL;
+ char *path = NULL;
int index, fd, err;
- pn = g_hash_table_lookup(pn_hash, owner);
- if (pn != NULL)
- return -EEXIST;
+ if (DBUS_TYPE_UNIX_FD < 0)
+ return -EINVAL;
fd = connman_inet_create_tunnel(&iface);
if (fd < 0)
return fd;
+ path = g_strdup_printf("/tethering/%s", iface);
+
+ pn = g_hash_table_lookup(pn_hash, path);
+ if (pn) {
+ g_free(path);
+ g_free(iface);
+ close(fd);
+ return -EEXIST;
+ }
+
index = connman_inet_ifindex(iface);
if (index < 0) {
err = -ENODEV;
goto error;
}
- DBG("inteface %s", iface);
+ DBG("interface %s", iface);
err = connman_inet_set_mtu(index, DEFAULT_MTU);
}
pn->owner = g_strdup(owner);
+ pn->path = path;
pn->watch = g_dbus_add_disconnect_watch(connection, pn->owner,
owner_disconnect, pn, NULL);
pn->msg = msg;
+ pn->reply = dbus_message_new_method_return(pn->msg);
+ if (pn->reply == NULL)
+ goto error;
+
pn->fd = fd;
pn->interface = iface;
pn->index = index;
- pn->server_ip = PRIVATE_NETWORK_IP;
- pn->peer_ip = PRIVATE_NETWORK_PEER_IP;
+ pn->pool = __connman_ippool_create(pn->fd, 1, 1, ippool_disconnect, pn);
+ if (pn->pool == NULL) {
+ errno = -ENOMEM;
+ goto error;
+ }
+
pn->primary_dns = PRIVATE_NETWORK_PRIMARY_DNS;
pn->secondary_dns = PRIVATE_NETWORK_SECONDARY_DNS;
pn->iface_watch = connman_rtnl_add_newlink_watch(index,
setup_tun_interface, pn);
- g_hash_table_insert(pn_hash, pn->owner, pn);
+ g_hash_table_insert(pn_hash, pn->path, pn);
return 0;
error:
close(fd);
g_free(iface);
+ g_free(path);
+ g_free(pn);
return err;
}
-int __connman_private_network_release(const char *owner)
+int __connman_private_network_release(const char *path)
{
struct connman_private_network *pn;
- pn = g_hash_table_lookup(pn_hash, owner);
+ pn = g_hash_table_lookup(pn_hash, path);
if (pn == NULL)
return -EACCES;
- g_hash_table_remove(pn_hash, owner);
+ g_hash_table_remove(pn_hash, path);
return 0;
}
{
DBG("");
- if (g_atomic_int_get(&tethering_enabled)) {
+ __sync_synchronize();
+ if (tethering_enabled == 0) {
if (tethering_dhcp_server)
dhcp_server_stop(tethering_dhcp_server);
- disable_bridge(BRIDGE_NAME);
- remove_bridge(BRIDGE_NAME);
+ __connman_bridge_disable(BRIDGE_NAME);
+ __connman_bridge_remove(BRIDGE_NAME);
+ __connman_nat_disable(BRIDGE_NAME);
}
if (connection == NULL)