blob: 175e5822db2640dec0171e6522df927b4b9cf3e2 [file] [log] [blame]
/*
*
* BlueZ - Bluetooth protocol stack for Linux
*
* Copyright (C) 2004-2010 Marcel Holtmann <marcel@holtmann.org>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* 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 <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <errno.h>
#include <netinet/in.h>
#include <glib.h>
#include "lib/bluetooth.h"
#include "lib/bnep.h"
#include "lib/sdp.h"
#include "lib/sdp_lib.h"
#include "lib/uuid.h"
#include "gdbus/gdbus.h"
#include "btio/btio.h"
#include "src/dbus-common.h"
#include "src/adapter.h"
#include "src/log.h"
#include "src/error.h"
#include "src/sdpd.h"
#include "src/shared/util.h"
#include "bnep.h"
#include "server.h"
#define NETWORK_SERVER_INTERFACE "org.bluez.NetworkServer1"
#define BNEP_INTERFACE "bnep%d"
#define SETUP_TIMEOUT 1
/* Pending Authorization */
struct network_session {
bdaddr_t dst; /* Remote Bluetooth Address */
char dev[16]; /* Interface name */
GIOChannel *io; /* Pending connect channel */
guint watch; /* BNEP socket watch */
};
struct network_adapter {
struct btd_adapter *adapter; /* Adapter pointer */
GIOChannel *io; /* Bnep socket */
struct network_session *setup; /* Setup in progress */
GSList *servers; /* Server register to adapter */
};
/* Main server structure */
struct network_server {
bdaddr_t src; /* Bluetooth Local Address */
char *name; /* Server service name */
char *bridge; /* Bridge name */
uint32_t record_id; /* Service record id */
uint16_t id; /* Service class identifier */
GSList *sessions; /* Active connections */
struct network_adapter *na; /* Adapter reference */
guint watch_id; /* Client service watch */
};
static GSList *adapters = NULL;
static gboolean security = TRUE;
static struct network_adapter *find_adapter(GSList *list,
struct btd_adapter *adapter)
{
for (; list; list = list->next) {
struct network_adapter *na = list->data;
if (na->adapter == adapter)
return na;
}
return NULL;
}
static struct network_server *find_server(GSList *list, uint16_t id)
{
for (; list; list = list->next) {
struct network_server *ns = list->data;
if (ns->id == id)
return ns;
}
return NULL;
}
static struct network_server *find_server_by_uuid(GSList *list,
const char *uuid)
{
bt_uuid_t srv_uuid, bnep_uuid;
if (!bt_string_to_uuid(&srv_uuid, uuid)) {
for (; list; list = list->next) {
struct network_server *ns = list->data;
bt_uuid16_create(&bnep_uuid, ns->id);
/* UUID value compare */
if (!bt_uuid_cmp(&srv_uuid, &bnep_uuid))
return ns;
}
} else {
for (; list; list = list->next) {
struct network_server *ns = list->data;
/* String value compare */
switch (ns->id) {
case BNEP_SVC_PANU:
if (!strcasecmp(uuid, "panu"))
return ns;
break;
case BNEP_SVC_NAP:
if (!strcasecmp(uuid, "nap"))
return ns;
break;
case BNEP_SVC_GN:
if (!strcasecmp(uuid, "gn"))
return ns;
break;
}
}
}
return NULL;
}
static sdp_record_t *server_record_new(const char *name, uint16_t id)
{
sdp_list_t *svclass, *pfseq, *apseq, *root, *aproto;
uuid_t root_uuid, pan, l2cap, bnep;
sdp_profile_desc_t profile[1];
sdp_list_t *proto[2];
sdp_data_t *v, *p;
uint16_t psm = BNEP_PSM, version = 0x0100;
uint16_t security_desc = (security ? 0x0001 : 0x0000);
uint16_t net_access_type = 0xfffe;
uint32_t max_net_access_rate = 0;
const char *desc = "Network service";
sdp_record_t *record;
record = sdp_record_alloc();
if (!record)
return NULL;
record->attrlist = NULL;
record->pattern = NULL;
switch (id) {
case BNEP_SVC_NAP:
sdp_uuid16_create(&pan, NAP_SVCLASS_ID);
svclass = sdp_list_append(NULL, &pan);
sdp_set_service_classes(record, svclass);
sdp_uuid16_create(&profile[0].uuid, NAP_PROFILE_ID);
profile[0].version = 0x0100;
pfseq = sdp_list_append(NULL, &profile[0]);
sdp_set_profile_descs(record, pfseq);
sdp_set_info_attr(record, name, NULL, desc);
sdp_attr_add_new(record, SDP_ATTR_NET_ACCESS_TYPE,
SDP_UINT16, &net_access_type);
sdp_attr_add_new(record, SDP_ATTR_MAX_NET_ACCESSRATE,
SDP_UINT32, &max_net_access_rate);
break;
case BNEP_SVC_GN:
sdp_uuid16_create(&pan, GN_SVCLASS_ID);
svclass = sdp_list_append(NULL, &pan);
sdp_set_service_classes(record, svclass);
sdp_uuid16_create(&profile[0].uuid, GN_PROFILE_ID);
profile[0].version = 0x0100;
pfseq = sdp_list_append(NULL, &profile[0]);
sdp_set_profile_descs(record, pfseq);
sdp_set_info_attr(record, name, NULL, desc);
break;
case BNEP_SVC_PANU:
sdp_uuid16_create(&pan, PANU_SVCLASS_ID);
svclass = sdp_list_append(NULL, &pan);
sdp_set_service_classes(record, svclass);
sdp_uuid16_create(&profile[0].uuid, PANU_PROFILE_ID);
profile[0].version = 0x0100;
pfseq = sdp_list_append(NULL, &profile[0]);
sdp_set_profile_descs(record, pfseq);
sdp_set_info_attr(record, name, NULL, desc);
break;
default:
sdp_record_free(record);
return NULL;
}
sdp_uuid16_create(&root_uuid, PUBLIC_BROWSE_GROUP);
root = sdp_list_append(NULL, &root_uuid);
sdp_set_browse_groups(record, root);
sdp_uuid16_create(&l2cap, L2CAP_UUID);
proto[0] = sdp_list_append(NULL, &l2cap);
p = sdp_data_alloc(SDP_UINT16, &psm);
proto[0] = sdp_list_append(proto[0], p);
apseq = sdp_list_append(NULL, proto[0]);
sdp_uuid16_create(&bnep, BNEP_UUID);
proto[1] = sdp_list_append(NULL, &bnep);
v = sdp_data_alloc(SDP_UINT16, &version);
proto[1] = sdp_list_append(proto[1], v);
/* Supported protocols */
{
uint16_t ptype[] = {
0x0800, /* IPv4 */
0x0806, /* ARP */
};
sdp_data_t *head, *pseq;
int p;
for (p = 0, head = NULL; p < 2; p++) {
sdp_data_t *data = sdp_data_alloc(SDP_UINT16, &ptype[p]);
if (head)
sdp_seq_append(head, data);
else
head = data;
}
pseq = sdp_data_alloc(SDP_SEQ16, head);
proto[1] = sdp_list_append(proto[1], pseq);
}
apseq = sdp_list_append(apseq, proto[1]);
aproto = sdp_list_append(NULL, apseq);
sdp_set_access_protos(record, aproto);
sdp_add_lang_attr(record);
sdp_attr_add_new(record, SDP_ATTR_SECURITY_DESC,
SDP_UINT16, &security_desc);
sdp_data_free(p);
sdp_data_free(v);
sdp_list_free(apseq, NULL);
sdp_list_free(root, NULL);
sdp_list_free(aproto, NULL);
sdp_list_free(proto[0], NULL);
sdp_list_free(proto[1], NULL);
sdp_list_free(svclass, NULL);
sdp_list_free(pfseq, NULL);
return record;
}
static void session_free(void *data)
{
struct network_session *session = data;
if (session->watch)
g_source_remove(session->watch);
if (session->io)
g_io_channel_unref(session->io);
g_free(session);
}
static void setup_destroy(void *user_data)
{
struct network_adapter *na = user_data;
struct network_session *setup = na->setup;
if (!setup)
return;
na->setup = NULL;
session_free(setup);
}
static gboolean bnep_setup(GIOChannel *chan,
GIOCondition cond, gpointer user_data)
{
const uint8_t bt_base[] = { 0x00, 0x00, 0x10, 0x00, 0x80, 0x00,
0x00, 0x80, 0x5F, 0x9B, 0x34, 0xFB };
struct network_adapter *na = user_data;
struct network_server *ns;
uint8_t packet[BNEP_MTU];
struct bnep_setup_conn_req *req = (void *) packet;
uint16_t dst_role = 0;
uint32_t val;
int n, sk;
char *bridge = NULL;
if (cond & G_IO_NVAL)
return FALSE;
if (cond & (G_IO_ERR | G_IO_HUP)) {
error("Hangup or error on BNEP socket");
return FALSE;
}
sk = g_io_channel_unix_get_fd(chan);
/*
* BNEP_SETUP_CONNECTION_REQUEST_MSG should be read and left in case
* of kernel setup connection msg handling.
*/
n = recv(sk, packet, sizeof(packet), MSG_PEEK);
if (n < 0) {
error("read(): %s(%d)", strerror(errno), errno);
return FALSE;
}
/*
* Initial received data packet is BNEP_SETUP_CONNECTION_REQUEST_MSG
* minimal size of this frame is 3 octets: 1 byte of BNEP Type +
* 1 byte of BNEP Control Type + 1 byte of BNEP services UUID size.
*/
if (n < 3) {
error("To few setup connection request data received");
return FALSE;
}
switch (req->uuid_size) {
case 2:
dst_role = get_be16(req->service);
break;
case 16:
if (memcmp(&req->service[4], bt_base, sizeof(bt_base)) != 0)
break;
/* fall through */
case 4:
val = get_be32(req->service);
if (val > 0xffff)
break;
dst_role = val;
break;
default:
break;
}
ns = find_server(na->servers, dst_role);
if (!ns || !ns->record_id || !ns->bridge)
error("Server error, bridge not initialized: (0x%x)", dst_role);
else
bridge = ns->bridge;
strncpy(na->setup->dev, BNEP_INTERFACE, 16);
na->setup->dev[15] = '\0';
if (bnep_server_add(sk, bridge, na->setup->dev, &na->setup->dst,
packet, n) < 0)
error("BNEP server cannot be added");
na->setup = NULL;
return FALSE;
}
static void connect_event(GIOChannel *chan, GError *err, gpointer user_data)
{
struct network_adapter *na = user_data;
if (err) {
error("%s", err->message);
setup_destroy(na);
return;
}
g_io_channel_set_close_on_unref(chan, TRUE);
na->setup->watch = g_io_add_watch_full(chan, G_PRIORITY_DEFAULT,
G_IO_IN | G_IO_HUP | G_IO_ERR | G_IO_NVAL,
bnep_setup, na, setup_destroy);
}
static void auth_cb(DBusError *derr, void *user_data)
{
struct network_adapter *na = user_data;
GError *err = NULL;
if (derr) {
error("Access denied: %s", derr->message);
goto reject;
}
if (!bt_io_accept(na->setup->io, connect_event, na, NULL,
&err)) {
error("bt_io_accept: %s", err->message);
g_error_free(err);
goto reject;
}
return;
reject:
g_io_channel_shutdown(na->setup->io, TRUE, NULL);
setup_destroy(na);
}
static void confirm_event(GIOChannel *chan, gpointer user_data)
{
struct network_adapter *na = user_data;
bdaddr_t src, dst;
char address[18];
GError *err = NULL;
guint ret;
bt_io_get(chan, &err,
BT_IO_OPT_SOURCE_BDADDR, &src,
BT_IO_OPT_DEST_BDADDR, &dst,
BT_IO_OPT_DEST, address,
BT_IO_OPT_INVALID);
if (err) {
error("%s", err->message);
g_error_free(err);
goto drop;
}
DBG("BNEP: incoming connect from %s", address);
if (na->setup) {
error("Refusing connect from %s: setup in progress", address);
goto drop;
}
if (!na->servers)
goto drop;
na->setup = g_new0(struct network_session, 1);
bacpy(&na->setup->dst, &dst);
na->setup->io = g_io_channel_ref(chan);
ret = btd_request_authorization(&src, &dst, BNEP_SVC_UUID,
auth_cb, na);
if (ret == 0) {
error("Refusing connect from %s", address);
setup_destroy(na);
goto drop;
}
return;
drop:
g_io_channel_shutdown(chan, TRUE, NULL);
}
int server_init(gboolean secure)
{
security = secure;
return 0;
}
static uint32_t register_server_record(struct network_server *ns)
{
sdp_record_t *record;
record = server_record_new(ns->name, ns->id);
if (!record) {
error("Unable to allocate new service record");
return 0;
}
if (adapter_service_add(ns->na->adapter, record) < 0) {
error("Failed to register service record");
sdp_record_free(record);
return 0;
}
DBG("got record id 0x%x", record->handle);
return record->handle;
}
static void server_remove_sessions(struct network_server *ns)
{
GSList *list;
for (list = ns->sessions; list; list = list->next) {
struct network_session *session = list->data;
if (*session->dev == '\0')
continue;
bnep_server_delete(ns->bridge, session->dev, &session->dst);
}
g_slist_free_full(ns->sessions, session_free);
ns->sessions = NULL;
}
static void server_disconnect(DBusConnection *conn, void *user_data)
{
struct network_server *ns = user_data;
server_remove_sessions(ns);
ns->watch_id = 0;
if (ns->record_id) {
adapter_service_remove(ns->na->adapter, ns->record_id);
ns->record_id = 0;
}
g_free(ns->bridge);
ns->bridge = NULL;
}
static DBusMessage *register_server(DBusConnection *conn,
DBusMessage *msg, void *data)
{
struct network_adapter *na = data;
struct network_server *ns;
DBusMessage *reply;
const char *uuid, *bridge;
if (!dbus_message_get_args(msg, NULL, DBUS_TYPE_STRING, &uuid,
DBUS_TYPE_STRING, &bridge, DBUS_TYPE_INVALID))
return btd_error_invalid_args(msg);
ns = find_server_by_uuid(na->servers, uuid);
if (ns == NULL)
return btd_error_failed(msg, "Invalid UUID");
if (ns->record_id)
return btd_error_already_exists(msg);
reply = dbus_message_new_method_return(msg);
if (!reply)
return NULL;
ns->record_id = register_server_record(ns);
if (!ns->record_id)
return btd_error_failed(msg, "SDP record registration failed");
g_free(ns->bridge);
ns->bridge = g_strdup(bridge);
ns->watch_id = g_dbus_add_disconnect_watch(conn,
dbus_message_get_sender(msg),
server_disconnect, ns, NULL);
return reply;
}
static DBusMessage *unregister_server(DBusConnection *conn,
DBusMessage *msg, void *data)
{
struct network_adapter *na = data;
struct network_server *ns;
DBusMessage *reply;
const char *uuid;
if (!dbus_message_get_args(msg, NULL, DBUS_TYPE_STRING, &uuid,
DBUS_TYPE_INVALID))
return btd_error_invalid_args(msg);
ns = find_server_by_uuid(na->servers, uuid);
if (!ns)
return btd_error_failed(msg, "Invalid UUID");
reply = dbus_message_new_method_return(msg);
if (!reply)
return NULL;
g_dbus_remove_watch(conn, ns->watch_id);
server_disconnect(conn, ns);
return reply;
}
static void adapter_free(struct network_adapter *na)
{
if (na->io != NULL) {
g_io_channel_shutdown(na->io, TRUE, NULL);
g_io_channel_unref(na->io);
}
setup_destroy(na);
btd_adapter_unref(na->adapter);
g_free(na);
}
static void server_free(void *data)
{
struct network_server *ns = data;
if (!ns)
return;
server_remove_sessions(ns);
if (ns->record_id)
adapter_service_remove(ns->na->adapter, ns->record_id);
g_dbus_remove_watch(btd_get_dbus_connection(), ns->watch_id);
g_free(ns->name);
g_free(ns->bridge);
g_free(ns);
}
static void path_unregister(void *data)
{
struct network_adapter *na = data;
DBG("Unregistered interface %s on path %s",
NETWORK_SERVER_INTERFACE, adapter_get_path(na->adapter));
g_slist_free_full(na->servers, server_free);
adapters = g_slist_remove(adapters, na);
adapter_free(na);
}
static const GDBusMethodTable server_methods[] = {
{ GDBUS_METHOD("Register",
GDBUS_ARGS({ "uuid", "s" }, { "bridge", "s" }), NULL,
register_server) },
{ GDBUS_METHOD("Unregister",
GDBUS_ARGS({ "uuid", "s" }), NULL,
unregister_server) },
{ }
};
static struct network_adapter *create_adapter(struct btd_adapter *adapter)
{
struct network_adapter *na;
GError *err = NULL;
na = g_new0(struct network_adapter, 1);
na->adapter = btd_adapter_ref(adapter);
na->io = bt_io_listen(NULL, confirm_event, na, NULL, &err,
BT_IO_OPT_SOURCE_BDADDR,
btd_adapter_get_address(adapter),
BT_IO_OPT_PSM, BNEP_PSM,
BT_IO_OPT_OMTU, BNEP_MTU,
BT_IO_OPT_IMTU, BNEP_MTU,
BT_IO_OPT_SEC_LEVEL,
security ? BT_IO_SEC_MEDIUM : BT_IO_SEC_LOW,
BT_IO_OPT_INVALID);
if (!na->io) {
error("%s", err->message);
g_error_free(err);
adapter_free(na);
return NULL;
}
return na;
}
int server_register(struct btd_adapter *adapter, uint16_t id)
{
struct network_adapter *na;
struct network_server *ns;
const char *path;
na = find_adapter(adapters, adapter);
if (!na) {
na = create_adapter(adapter);
if (!na)
return -EINVAL;
adapters = g_slist_append(adapters, na);
}
ns = find_server(na->servers, id);
if (ns)
return 0;
ns = g_new0(struct network_server, 1);
ns->name = g_strdup("Network service");
path = adapter_get_path(adapter);
if (g_slist_length(na->servers) > 0)
goto done;
if (!g_dbus_register_interface(btd_get_dbus_connection(), path,
NETWORK_SERVER_INTERFACE,
server_methods, NULL, NULL, na,
path_unregister)) {
error("D-Bus failed to register %s interface",
NETWORK_SERVER_INTERFACE);
server_free(ns);
return -1;
}
DBG("Registered interface %s on path %s", NETWORK_SERVER_INTERFACE,
path);
done:
bacpy(&ns->src, btd_adapter_get_address(adapter));
ns->id = id;
ns->na = na;
ns->record_id = 0;
na->servers = g_slist_append(na->servers, ns);
return 0;
}
int server_unregister(struct btd_adapter *adapter, uint16_t id)
{
struct network_adapter *na;
struct network_server *ns;
na = find_adapter(adapters, adapter);
if (!na)
return -EINVAL;
ns = find_server(na->servers, id);
if (!ns)
return -EINVAL;
na->servers = g_slist_remove(na->servers, ns);
server_free(ns);
if (g_slist_length(na->servers) > 0)
return 0;
g_dbus_unregister_interface(btd_get_dbus_connection(),
adapter_get_path(adapter),
NETWORK_SERVER_INTERFACE);
return 0;
}