/*
 * le.c
 *
 * Copyright (c) 2015 Takanori Watanabe <takawata@freebsd.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $Id: hccontrol.c,v 1.5 2003/09/05 00:38:24 max Exp $
 * $FreeBSD$
 */

#include <sys/types.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>
#include <sys/select.h>
#include <assert.h>
#include <bitstring.h>
#include <err.h>
#include <errno.h>
#include <netgraph/ng_message.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdint.h>
#define L2CAP_SOCKET_CHECKED
#include <bluetooth.h>
#include "hccontrol.h"

static int le_set_scan_param(int s, int argc, char *argv[]);
static int le_set_scan_enable(int s, int argc, char *argv[]);
static int parse_param(int argc, char *argv[], char *buf, int *len);
static int le_set_scan_response(int s, int argc, char *argv[]);
static int le_read_supported_status(int s, int argc, char *argv[]);
static int le_read_local_supported_features(int s, int argc ,char *argv[]);
static int set_le_event_mask(int s, uint64_t mask);
static int set_event_mask(int s, uint64_t mask);
static int le_enable(int s, int argc, char *argv[]);

static int
le_set_scan_param(int s, int argc, char *argv[])
{
	int type;
	int interval;
	int window;
	int adrtype;
	int policy;
	int e, n;

	ng_hci_le_set_scan_parameters_cp cp;
	ng_hci_le_set_scan_parameters_rp rp;

	if (argc != 5)
		return USAGE;
	
	if (strcmp(argv[0], "active") == 0)
		type = 1;
	else if (strcmp(argv[0], "passive") == 0)
		type = 0;
	else
		return USAGE;

	interval = (int)(atof(argv[1])/0.625);
	interval = (interval < 4)? 4: interval;
	window = (int)(atof(argv[2])/0.625);
	window = (window < 4) ? 4 : interval;
	
	if (strcmp(argv[3], "public") == 0)
		adrtype = 0;
	else if (strcmp(argv[3], "random") == 0)
		adrtype = 1;
	else
		return USAGE;

	if (strcmp(argv[4], "all") == 0)
		policy = 0;
	else if (strcmp(argv[4], "whitelist") == 0)
		policy = 1;
	else
		return USAGE;

	cp.le_scan_type = type;
	cp.le_scan_interval = interval;
	cp.own_address_type = adrtype;
	cp.le_scan_window = window;
	cp.scanning_filter_policy = policy;
	n = sizeof(rp);
	e = hci_request(s, NG_HCI_OPCODE(NG_HCI_OGF_LE,
		NG_HCI_OCF_LE_SET_SCAN_PARAMETERS), 
		(void *)&cp, sizeof(cp), (void *)&rp, &n);

	return 0;
}

static int
le_set_scan_enable(int s, int argc, char *argv[])
{
	ng_hci_le_set_scan_enable_cp cp;
	ng_hci_le_set_scan_enable_rp rp;
	int e, n, enable = 0;

	if (argc != 1)
		return USAGE;
	  
	if (strcmp(argv[0], "enable") == 0)
		enable = 1;
	else if (strcmp(argv[0], "disable") != 0)
		return USAGE;

	n = sizeof(rp);
	cp.le_scan_enable = enable;
	cp.filter_duplicates = 0;
	e = hci_request(s, NG_HCI_OPCODE(NG_HCI_OGF_LE,
		NG_HCI_OCF_LE_SET_SCAN_ENABLE), 
		(void *)&cp, sizeof(cp), (void *)&rp, &n);
			
	if (e != 0 || rp.status != 0)
		return ERROR;

	return OK;
}

static int
parse_param(int argc, char *argv[], char *buf, int *len)
{
	char *buflast  =  buf + (*len);
	char *curbuf = buf;
	char *token,*lenpos;
	int ch;
	int datalen;
	uint16_t value;
	optreset = 1;
	optind = 0;
	while ((ch = getopt(argc, argv , "n:f:u:")) != -1) {
		switch(ch){
		case 'n':
			datalen = strlen(optarg);
			if ((curbuf + datalen + 2) >= buflast)
				goto done;
			curbuf[0] = datalen + 1;
			curbuf[1] = 8;
			curbuf += 2;
			memcpy(curbuf, optarg, datalen);
			curbuf += datalen;
			break;
		case 'f':
			if (curbuf+3 > buflast)
				goto done;
			curbuf[0] = 2;
			curbuf[1] = 1;
			curbuf[2] = atoi(optarg);
			curbuf += 3;
			break;
		case 'u':
			lenpos = buf;
			if ((buf+2) >= buflast)
				goto done;
			curbuf[1] = 2;
			*lenpos = 1;
			curbuf += 2;
			while ((token = strsep(&optarg, ",")) != NULL) {
				value = strtol(token, NULL, 16);
				if ((curbuf+2) >= buflast)
					break;
				curbuf[0] = value &0xff;
				curbuf[1] = (value>>8)&0xff;
				curbuf += 2;
			}
				
		}
	}
done:
	*len = curbuf - buf;

	return OK;
}

static int
le_set_scan_response(int s, int argc, char *argv[])
{
	ng_hci_le_set_scan_response_data_cp cp;
	ng_hci_le_set_scan_response_data_rp rp;
	int n;
	int e;
	int len;
	char buf[NG_HCI_ADVERTISING_DATA_SIZE];

	len = sizeof(buf);
	parse_param(argc, argv, buf, &len);
	memset(cp.scan_response_data, 0, sizeof(cp.scan_response_data));
	cp.scan_response_data_length = len;
	memcpy(cp.scan_response_data, buf, len);
	n = sizeof(rp);
	e = hci_request(s, NG_HCI_OPCODE(NG_HCI_OGF_LE,
			NG_HCI_OCF_LE_SET_SCAN_RESPONSE_DATA), 
			(void *)&cp, sizeof(cp), (void *)&rp, &n);
			
	printf("SET SCAN RESPONSE %d %d %d\n", e, rp.status, n);

	return OK;
}

static int
le_read_local_supported_features(int s, int argc ,char *argv[])
{
	ng_hci_le_read_local_supported_features_rp rp;
	int e;
	int n = sizeof(rp);

	e = hci_simple_request(s,
			NG_HCI_OPCODE(NG_HCI_OGF_LE,
			NG_HCI_OCF_LE_READ_LOCAL_SUPPORTED_FEATURES), 
			(void *)&rp, &n);

	printf("LOCAL SUPPORTED: %d %d %jx\n", e, rp.status,
	       (uintmax_t) rp.le_features);

	return 0;
}

static int
le_read_supported_status(int s, int argc, char *argv[])
{
	ng_hci_le_read_supported_status_rp rp;
	int e;
	int n = sizeof(rp);

	e = hci_simple_request(s, NG_HCI_OPCODE(
					NG_HCI_OGF_LE,
					NG_HCI_OCF_LE_READ_SUPPORTED_STATUS),
			       		(void *)&rp, &n);

	printf("LE_STATUS: %d %d %jx\n", e, rp.status, (uintmax_t)rp.le_status);

	return 0;
}

static int
set_le_event_mask(int s, uint64_t mask)
{
	ng_hci_le_set_event_mask_cp semc;
	ng_hci_le_set_event_mask_rp rp;  
	int i, n ,e;
	
	n = sizeof(rp);
	
	for (i=0; i < NG_HCI_LE_EVENT_MASK_SIZE; i++) {
		semc.event_mask[i] = mask&0xff;
		mask >>= 8;
	}
	e = hci_request(s, NG_HCI_OPCODE(NG_HCI_OGF_LE,
			NG_HCI_OCF_LE_SET_EVENT_MASK),
			(void *)&semc, sizeof(semc), (void *)&rp, &n);
	
	return 0;
}

static int
set_event_mask(int s, uint64_t mask)
{
	ng_hci_set_event_mask_cp semc;
	ng_hci_set_event_mask_rp rp;  
	int i, n, e;
	
	n = sizeof(rp);
	
	for (i=0; i < NG_HCI_EVENT_MASK_SIZE; i++) {
		semc.event_mask[i] = mask&0xff;
		mask >>= 8;
	}
	e = hci_request(s, NG_HCI_OPCODE(NG_HCI_OGF_HC_BASEBAND,
			NG_HCI_OCF_SET_EVENT_MASK),
			(void *)&semc, sizeof(semc), (void *)&rp, &n);
	
	return 0;
}

static
int le_enable(int s, int argc, char *argv[])
{
	if (argc != 1)
		return USAGE;
	
	if (strcasecmp(argv[0], "enable") == 0) {
		set_event_mask(s, NG_HCI_EVENT_MASK_DEFAULT |
			       NG_HCI_EVENT_MASK_LE);
		set_le_event_mask(s, NG_HCI_LE_EVENT_MASK_ALL);
	} else if (strcasecmp(argv[0], "disble") == 0)
		set_event_mask(s, NG_HCI_EVENT_MASK_DEFAULT);
	else
		return USAGE;

	return OK;
}

struct hci_command le_commands[] = {
{
	"le_enable",
	"le_enable [enable|disable] \n"
	"Enable LE event ",
	&le_enable,
},
  {
	  "le_read_local_supported_features",
	  "le_read_local_supported_features\n" 
	  "read local supported features mask",
	  &le_read_local_supported_features,
  },
  {
	  "le_read_supported_status",
	  "le_read_supported_status\n"
	  "read supported status"	  
	  ,
	  &le_read_supported_status,
  },
  {
	  "le_set_scan_response",
	  "le_set_scan_response -n $name -f $flag -u $uuid16,$uuid16 \n"
	  "set LE scan response data"
	  ,
	  &le_set_scan_response,
  },
  {
	  "le_set_scan_enable",
	  "le_set_scan_enable [enable|disable] \n"
	  "enable or disable LE device scan",
	  &le_set_scan_enable
  },
  {
	  "le_set_scan_param",
	  "le_set_scan_param [active|passive] interval(ms) window(ms) [public|random] [all|whitelist] \n"
	  "set LE device scan parameter",
	  &le_set_scan_param
  },
};