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/*
*
* neard - Near Field Communication manager
*
* Copyright (C) 2011 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 <unistd.h>
#include <stdint.h>
#include <errno.h>
#include <string.h>
#include <sys/socket.h>
#include <linux/socket.h>
#include <linux/nfc.h>
#include <near/plugin.h>
#include <near/log.h>
#include <near/types.h>
#include <near/target.h>
#include <near/tlv.h>
#include "p2p.h"
static GSList *driver_list = NULL;
struct p2p_driver_data {
struct near_p2p_driver *driver;
uint32_t adapter_idx;
uint32_t target_idx;
near_tag_io_cb cb;
int server_fd;
guint watch;
};
static gboolean p2p_listener_event(GIOChannel *channel, GIOCondition condition,
gpointer user_data)
{
struct sockaddr_nfc_llcp client_addr;
int server_fd, client_fd;
socklen_t client_addr_len;
struct p2p_driver_data *driver_data = user_data;
struct near_p2p_driver *driver = driver_data->driver;
DBG("condition 0x%x", condition);
if (condition & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) {
if (driver_data->watch > 0)
g_source_remove(driver_data->watch);
driver_data->watch = 0;
near_error("Error with %s server channel", driver->name);
return FALSE;
}
if (condition & G_IO_IN) {
server_fd = g_io_channel_unix_get_fd(channel);
client_fd = accept(server_fd, (struct sockaddr *)&client_addr,
&client_addr_len);
if (client_fd < 0) {
near_error("accept failed %d", client_fd);
close(server_fd);
return FALSE;
}
DBG("client dsap %d ssap %d",
client_addr.dsap, client_addr.ssap);
driver->read(client_fd, driver_data->adapter_idx,
driver_data->target_idx, driver_data->cb);
close(client_fd);
return FALSE;
}
return FALSE;
}
static int p2p_bind(struct near_p2p_driver *driver, uint32_t adapter_idx,
uint32_t target_idx, near_tag_io_cb cb)
{
int err, fd;
struct sockaddr_nfc_llcp addr;
GIOChannel *channel;
struct p2p_driver_data *driver_data;
DBG("Binding %s", driver->name);
fd = socket(AF_NFC, SOCK_STREAM, NFC_SOCKPROTO_LLCP);
if (fd < 0)
return -errno;
memset(&addr, 0, sizeof(struct sockaddr_nfc_llcp));
addr.sa_family = AF_NFC;
addr.dev_idx = adapter_idx;
addr.nfc_protocol = NFC_PROTO_NFC_DEP;
addr.service_name_len = strlen(driver->service_name);
strcpy(addr.service_name, driver->service_name);
err = bind(fd, (struct sockaddr *)&addr,
sizeof(struct sockaddr_nfc_llcp));
if (err < 0) {
near_error("%s bind failed %d", driver->name, err);
close(fd);
return err;
}
err = listen(fd, 10);
if (err < 0) {
near_error("%s listen failed %d", driver->name, err);
close(fd);
return err;
}
driver_data = g_try_malloc0(sizeof(struct p2p_driver_data));
if (driver_data == NULL) {
close(fd);
return -ENOMEM;
}
driver_data->driver = driver;
driver_data->adapter_idx = adapter_idx;
driver_data->target_idx = target_idx;
driver_data->server_fd = fd;
driver_data->cb = cb;
channel = g_io_channel_unix_new(fd);
g_io_channel_set_close_on_unref(channel, TRUE);
driver_data->watch = g_io_add_watch(channel,
G_IO_IN | G_IO_HUP | G_IO_NVAL | G_IO_ERR,
p2p_listener_event,
(gpointer) driver_data);
return 0;
}
static int p2p_read(uint32_t adapter_idx,
uint32_t target_idx, near_tag_io_cb cb)
{
int err = 0;
GSList *list;
for (list = driver_list; list != NULL; list = list->next) {
struct near_p2p_driver *driver = list->data;
err &= p2p_bind(driver, adapter_idx, target_idx, cb);
}
return err;
}
static struct near_tag_driver p2p_driver = {
.type = NEAR_TAG_NFC_DEP,
.priority = NEAR_TAG_PRIORITY_HIGH,
.read_tag = p2p_read,
};
int near_p2p_register(struct near_p2p_driver *driver)
{
DBG("driver %p name %s", driver, driver->name);
driver_list = g_slist_prepend(driver_list, driver);
return 0;
}
void near_p2p_unregister(struct near_p2p_driver *driver)
{
DBG("driver %p name %s", driver, driver->name);
driver_list = g_slist_remove(driver_list, driver);
}
static int p2p_init(void)
{
DBG("");
npp_init();
snep_init();
handover_init();
return near_tag_driver_register(&p2p_driver);
}
static void p2p_exit(void)
{
DBG("");
snep_exit();
npp_exit();
handover_exit();
near_tag_driver_unregister(&p2p_driver);
}
NEAR_PLUGIN_DEFINE(p2p, "NFC Forum peer to peer mode support", VERSION,
NEAR_PLUGIN_PRIORITY_HIGH, p2p_init, p2p_exit)
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