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/*
*
* neard - Near Field Communication manager
*
* Copyright (C) 2012 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 <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/adapter.h>
#include <near/device.h>
#include <near/ndef.h>
#include <near/tlv.h>
#include "p2p.h"
struct p2p_npp_ndef_entry {
uint8_t action;
uint32_t ndef_length;
uint8_t ndef[];
} __attribute__((packed));
struct p2p_npp_frame {
uint8_t version;
uint32_t n_ndef;
struct p2p_npp_ndef_entry ndefs[];
} __attribute__((packed));
static near_bool_t npp_read(int client_fd,
uint32_t adapter_idx, uint32_t target_idx,
near_tag_io_cb cb)
{
struct near_device *device;
struct p2p_npp_frame frame;
struct p2p_npp_ndef_entry entry;
int bytes_recv, n_ndef, i, ndef_length, total_ndef_length, err;
uint8_t *ndefs, *current_ndef;
GList *records;
ndefs = NULL;
total_ndef_length = 0;
err = 0;
bytes_recv = recv(client_fd, &frame, sizeof(frame), 0);
if (bytes_recv < 0) {
near_error("Could not read NPP frame %d", bytes_recv);
return bytes_recv;
}
n_ndef = GINT_FROM_BE(frame.n_ndef);
DBG("version %d %d NDEFs", frame.version, n_ndef);
for (i = 0; i < n_ndef; i++) {
bytes_recv = recv(client_fd, &entry, sizeof(entry), 0);
if (bytes_recv < 0) {
near_error("Could not read NPP NDEF entry %d",
bytes_recv);
err = bytes_recv;
break;
}
ndef_length = GINT_FROM_BE(entry.ndef_length);
total_ndef_length += ndef_length + TLV_SIZE;
DBG("NDEF %d length %d", i, ndef_length);
ndefs = g_try_realloc(ndefs, total_ndef_length);
if (ndefs == NULL) {
near_error("Could not allocate NDEF buffer %d",
bytes_recv);
err = -ENOMEM;
break;
}
current_ndef = ndefs + total_ndef_length
- (ndef_length + TLV_SIZE);
current_ndef[0] = TLV_NDEF;
current_ndef[1] = ndef_length;
bytes_recv = recv(client_fd, current_ndef + TLV_SIZE,
ndef_length, 0);
if (bytes_recv < 0) {
near_error("Could not read NDEF entry %d",
bytes_recv);
err = bytes_recv;
break;
}
}
if (total_ndef_length == 0)
return err;
DBG("Total NDEF length %d", total_ndef_length);
err = near_tag_add_data(adapter_idx, target_idx,
ndefs, total_ndef_length);
if (err < 0)
return FALSE;
device = near_device_get_device(adapter_idx, target_idx);
if (device == NULL) {
g_free(ndefs);
return -ENOMEM;
}
for (i = 0; i < total_ndef_length; i++)
DBG("NDEF[%d] 0x%x", i, ndefs[i]);
records = near_tlv_parse(ndefs, total_ndef_length);
near_device_add_records(device, records, cb, 0);
g_free(ndefs);
return FALSE;
}
struct near_p2p_driver npp_driver = {
.name = "NPP",
.service_name = "com.android.npp",
.read = npp_read,
};
int npp_init(void)
{
return near_p2p_register(&npp_driver);
}
void npp_exit(void)
{
near_p2p_unregister(&npp_driver);
}
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