X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=src%2Ftethering.c;h=c67f2007fb584c9628be2cd712790aed9440dc86;hb=86cd761a6e375875ec904ea378ed61d4fc41e1b8;hp=6c15cc2ece140a7ed880be6cc4911b174f521344;hpb=4c055d2726cd428c34c1debbe4126d07ef9e6db9;p=framework%2Fconnectivity%2Fconnman.git diff --git a/src/tethering.c b/src/tethering.c index 6c15cc2..c67f200 100644 --- a/src/tethering.c +++ b/src/tethering.c @@ -2,7 +2,8 @@ * * 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 * it under the terms of the GNU General Public License version 2 as @@ -23,34 +24,70 @@ #include #endif +#include +#include +#include #include #include #include #include #include +#include +#include +#include #include "connman.h" #include +#include + +#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" -static connman_bool_t tethering_status = FALSE; -static const char *default_interface = NULL; -static volatile gint tethering_enabled; +#define DEFAULT_MTU 1500 + +#define PRIVATE_NETWORK_PRIMARY_DNS BRIDGE_DNS +#define PRIVATE_NETWORK_SECONDARY_DNS "8.8.4.4" + +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; + int fd; + char *interface; + int index; + guint iface_watch; + struct connman_ippool *pool; + const char *primary_dns; + const char *secondary_dns; +}; -connman_bool_t __connman_tethering_get_status(void) +const char *__connman_tethering_get_bridge(void) { - return tethering_status; -} + struct stat st; + + if (stat(BRIDGE_PROC_DIR, &st) < 0) { + connman_error("Missing support for 802.1d ethernet bridging"); + return NULL; + } + return BRIDGE_NAME; +} static void dhcp_server_debug(const char *str, void *data) { @@ -129,217 +166,295 @@ static void dhcp_server_stop(GDHCPServer *server) g_dhcp_server_unref(server); } -static int create_bridge(const char *name) +static void tethering_restart(struct connman_ippool *pool, void *user_data) { - int sk, err; - - DBG("name %s", name); + __connman_tethering_set_disabled(); + __connman_tethering_set_enabled(); +} - sk = socket(AF_INET, SOCK_STREAM, 0); - if (sk < 0) - return -EOPNOTSUPP; +void __connman_tethering_set_enabled(void) +{ + int index; + 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; - err = ioctl(sk, SIOCBRADDBR, name); + DBG("enabled %d", tethering_enabled + 1); - close(sk); + if (__sync_fetch_and_add(&tethering_enabled, 1) != 0) + return; + err = __connman_bridge_create(BRIDGE_NAME); if (err < 0) - return -EOPNOTSUPP; - - return 0; -} + return; -static int remove_bridge(const char *name) -{ - int sk, 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; + } - DBG("name %s", name); + 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); - sk = socket(AF_INET, SOCK_STREAM, 0); - if (sk < 0) - return -EOPNOTSUPP; + err = __connman_bridge_enable(BRIDGE_NAME, gateway, broadcast); + if (err < 0 && err != -EALREADY) { + __connman_bridge_remove(BRIDGE_NAME); + return; + } - err = ioctl(sk, SIOCBRDELBR, name); + 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; + } - close(sk); + 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; + } - if (err < 0) - return -EOPNOTSUPP; + prefixlen = + __connman_ipconfig_netmask_prefix_len(subnet_mask); + __connman_nat_enable(BRIDGE_NAME, start_ip, prefixlen); - return 0; + DBG("tethering started"); } -static int enable_bridge(const char *name) +void __connman_tethering_set_disabled(void) { - int err, index; + DBG("enabled %d", tethering_enabled - 1); - index = connman_inet_ifindex(name); - if (index < 0) - return index; + __connman_dnsproxy_remove_listener(BRIDGE_NAME); - 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; + if (__sync_fetch_and_sub(&tethering_enabled, 1) != 1) + return; - return connman_inet_ifup(index); -} + __connman_nat_disable(BRIDGE_NAME); -static int disable_bridge(const char *name) -{ - int index; + dhcp_server_stop(tethering_dhcp_server); - index = connman_inet_ifindex(name); - if (index < 0) - return index; + tethering_dhcp_server = NULL; + + __connman_bridge_disable(BRIDGE_NAME); - return connman_inet_ifdown(index); + __connman_ippool_unref(dhcp_ippool); + + __connman_bridge_remove(BRIDGE_NAME); + + DBG("tethering stopped"); } -static int enable_ip_forward(connman_bool_t enable) +static void setup_tun_interface(unsigned int flags, unsigned change, + void *data) { + struct connman_private_network *pn = data; + unsigned char prefixlen; + DBusMessageIter array, dict; + const char *server_ip; + const char *peer_ip; + const char *subnet_mask; + int err; - FILE *f; + DBG("index %d flags %d change %d", pn->index, flags, change); - f = fopen("/proc/sys/net/ipv4/ip_forward", "r+"); - if (f == NULL) - return -errno; + if (flags & IFF_UP) + return; - if (enable == TRUE) - fprintf(f, "1"); - else - fprintf(f, "0"); + 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(subnet_mask); - fclose(f); + if ((__connman_inet_modify_address(RTM_NEWADDR, + NLM_F_REPLACE | NLM_F_ACK, pn->index, AF_INET, + server_ip, peer_ip, prefixlen, NULL)) < 0) { + DBG("address setting failed"); + return; + } - return 0; -} + connman_inet_ifup(pn->index); -static int enable_nat(const char *interface) -{ - int err; + err = __connman_nat_enable(BRIDGE_NAME, server_ip, prefixlen); + if (err < 0) { + connman_error("failed to enable NAT"); + goto error; + } - if (interface == NULL) - return 0; + dbus_message_iter_init_append(pn->reply, &array); - /* Enable IPv4 forwarding */ - err = enable_ip_forward(TRUE); - if (err < 0) - return err; + dbus_message_iter_append_basic(&array, DBUS_TYPE_OBJECT_PATH, + &pn->path); - /* POSTROUTING flush */ - err = __connman_iptables_command("-t nat -F POSTROUTING"); - if (err < 0) - return err; + connman_dbus_dict_open(&array, &dict); - /* Enable masquerading */ - err = __connman_iptables_command("-t nat -A POSTROUTING " - "-o %s -j MASQUERADE", interface); - if (err < 0) - return err; + connman_dbus_dict_append_basic(&dict, "ServerIPv4", + DBUS_TYPE_STRING, &server_ip); + connman_dbus_dict_append_basic(&dict, "PeerIPv4", + DBUS_TYPE_STRING, &peer_ip); + connman_dbus_dict_append_basic(&dict, "PrimaryDNS", + DBUS_TYPE_STRING, &pn->primary_dns); + connman_dbus_dict_append_basic(&dict, "SecondaryDNS", + DBUS_TYPE_STRING, &pn->secondary_dns); - return __connman_iptables_commit("nat"); -} + connman_dbus_dict_close(&array, &dict); -static void disable_nat(const char *interface) -{ - int err; + dbus_message_iter_append_basic(&array, DBUS_TYPE_UNIX_FD, &pn->fd); - /* Disable IPv4 forwarding */ - enable_ip_forward(FALSE); + g_dbus_send_message(connection, pn->reply); - /* POSTROUTING flush */ - err = __connman_iptables_command("-t nat -F POSTROUTING"); - if (err < 0) - return; + return; - __connman_iptables_commit("nat"); +error: + pn->reply = __connman_error_failed(pn->msg, -err); + g_dbus_send_message(connection, pn->reply); + + g_hash_table_remove(pn_hash, pn->path); } -void __connman_tethering_set_enabled(void) +static void remove_private_network(gpointer user_data) { - int err; + struct connman_private_network *pn = user_data; - if (tethering_status == FALSE) - return; + __connman_nat_disable(BRIDGE_NAME); + connman_rtnl_remove_watch(pn->iface_watch); + __connman_ippool_unref(pn->pool); - DBG("enabled %d", tethering_enabled + 1); + if (pn->watch > 0) { + g_dbus_remove_watch(connection, pn->watch); + pn->watch = 0; + } - if (g_atomic_int_exchange_and_add(&tethering_enabled, 1) == 0) { - err = enable_bridge(BRIDGE_NAME); - if (err < 0) - return; + close(pn->fd); - 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); - return; - } + g_free(pn->interface); + g_free(pn->owner); + g_free(pn->path); + g_free(pn); +} - enable_nat(default_interface); +static void owner_disconnect(DBusConnection *connection, void *user_data) +{ + struct connman_private_network *pn = user_data; - DBG("tethering started"); - } + DBG("%s died", pn->owner); + + pn->watch = 0; + + g_hash_table_remove(pn_hash, pn->path); } -void __connman_tethering_set_disabled(void) +static void ippool_disconnect(struct connman_ippool *pool, void *user_data) { - if (tethering_status == TRUE) - return; + struct connman_private_network *pn = user_data; - DBG("enabled %d", tethering_enabled - 1); + DBG("block used externally"); + + g_hash_table_remove(pn_hash, pn->path); +} - if (g_atomic_int_dec_and_test(&tethering_enabled) == 0) { - disable_nat(default_interface); +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; + + 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; + } - dhcp_server_stop(tethering_dhcp_server); + index = connman_inet_ifindex(iface); + if (index < 0) { + err = -ENODEV; + goto error; + } + DBG("interface %s", iface); - disable_bridge(BRIDGE_NAME); + err = connman_inet_set_mtu(index, DEFAULT_MTU); - DBG("tethering stopped"); + pn = g_try_new0(struct connman_private_network, 1); + if (pn == NULL) { + err = -ENOMEM; + goto error; } -} -int __connman_tethering_set_status(connman_bool_t status) -{ - if (status == tethering_status) - return -EALREADY; - - if (status == TRUE) { - create_bridge(BRIDGE_NAME); - __connman_technology_enable_tethering(BRIDGE_NAME); - } else { - __connman_technology_disable_tethering(BRIDGE_NAME); - remove_bridge(BRIDGE_NAME); + 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->pool = __connman_ippool_create(pn->fd, 1, 1, ippool_disconnect, pn); + if (pn->pool == NULL) { + errno = -ENOMEM; + goto error; } - tethering_status = status; + pn->primary_dns = PRIVATE_NETWORK_PRIMARY_DNS; + pn->secondary_dns = PRIVATE_NETWORK_SECONDARY_DNS; - return 0; -} + pn->iface_watch = connman_rtnl_add_newlink_watch(index, + setup_tun_interface, pn); -void __connman_tethering_update_interface(const char *interface) -{ - DBG("interface %s", interface); + g_hash_table_insert(pn_hash, pn->path, pn); - default_interface = interface; + return 0; - if (interface == NULL) { - disable_nat(interface); +error: + close(fd); + g_free(iface); + g_free(path); + g_free(pn); + return err; +} - return; - } +int __connman_private_network_release(const char *path) +{ + struct connman_private_network *pn; - if (tethering_status == FALSE || - !g_atomic_int_get(&tethering_enabled)) - return; + pn = g_hash_table_lookup(pn_hash, path); + if (pn == NULL) + return -EACCES; - enable_nat(interface); + g_hash_table_remove(pn_hash, path); + return 0; } int __connman_tethering_init(void) @@ -348,6 +463,13 @@ int __connman_tethering_init(void) tethering_enabled = 0; + connection = connman_dbus_get_connection(); + if (connection == NULL) + return -EFAULT; + + pn_hash = g_hash_table_new_full(g_str_hash, g_str_equal, + NULL, remove_private_network); + return 0; } @@ -355,10 +477,18 @@ void __connman_tethering_cleanup(void) { DBG(""); - if (tethering_status == TRUE) { + __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) + return; + + g_hash_table_destroy(pn_hash); + dbus_connection_unref(connection); }