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nuttx-apps/wireless/bluetooth/btsak/btsak_scan.c

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/****************************************************************************
* apps/wireless/bluetooth/btsak/btsak_scan.c
* Bluetooth Swiss Army Knife -- Scan command
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Based loosely on the i8sak IEEE 802.15.4 program by Anthony Merlino and
* Sebastien Lorquet. Commands inspired for btshell example in the
* Intel/Zephyr Arduino 101 package (BSD license).
*
* 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.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/ioctl.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#include <errno.h>
#include <nuttx/wireless/bluetooth/bt_ioctl.h>
#include "btsak.h"
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: btsak_scan_showusage
*
* Description:
* Show usage of the scan command
*
****************************************************************************/
static void btsak_scan_showusage(FAR const char *progname,
FAR const char *cmd, int exitcode)
{
fprintf(stderr, "%s: Scan commands:\n", cmd);
fprintf(stderr, "Usage:\n\n");
fprintf(stderr, "\t%s <ifname> %s [-h] <start [-d]|get|stop>\n",
progname, cmd);
fprintf(stderr, "\nWhere the options do the following:\n\n");
fprintf(stderr, "\tstart\t- Starts scanning. The -d option enables duplicate\n");
fprintf(stderr, "\t\t filtering.\n");
fprintf(stderr, "\tget\t- Shows new accumulated scan results\n");
fprintf(stderr, "\tstop\t- Stops scanning\n");
exit(exitcode);
}
/****************************************************************************
* Name: btsak_cmd_scanstart
*
* Description:
* Scan start command
*
****************************************************************************/
static void btsak_cmd_scanstart(FAR struct btsak_s *btsak, FAR char *cmd,
int argc, FAR char *argv[])
{
struct btreq_s btreq;
int argind;
int sockfd;
int ret;
memset(&btreq, 0, sizeof(struct btreq_s));
strncpy(btreq.btr_name, btsak->ifname, IFNAMSIZ);
/* Check if an option was provided */
argind = 1;
btreq.btr_dupenable = false;
if (argc > 1)
{
if (strcmp(argv[argind], "-d") == 0)
{
btreq.btr_dupenable = true;
}
else
{
fprintf(stderr, "ERROR: Unrecognized option: %s\n",
argv[argind]);
btsak_scan_showusage(btsak->progname, cmd, EXIT_FAILURE);
}
}
/* Perform the IOCTL to start scanning */
sockfd = btsak_socket(btsak);
if (sockfd >= 0)
{
ret = ioctl(sockfd, SIOCBTSCANSTART,
(unsigned long)((uintptr_t)&btreq));
if (ret < 0)
{
fprintf(stderr, "ERROR: ioctl(SIOCBTSCANSTART) failed: %d\n",
errno);
}
}
close(sockfd);
}
/****************************************************************************
* Name: btsak_cmd_scanget
*
* Description:
* Scan get command
*
****************************************************************************/
static void btsak_cmd_scanget(FAR struct btsak_s *btsak, FAR char *cmd,
int argc, FAR char *argv[])
{
struct btreq_s btreq;
struct bt_scanresponse_s result[5];
int sockfd;
int ret;
/* Perform the IOCTL to get the scan results so far */
memset(&btreq, 0, sizeof(struct btreq_s));
strncpy(btreq.btr_name, btsak->ifname, IFNAMSIZ);
btreq.btr_nrsp = 5;
btreq.btr_rsp = result;
sockfd = btsak_socket(btsak);
if (sockfd >= 0)
{
ret = ioctl(sockfd, SIOCBTSCANGET,
(unsigned long)((uintptr_t)&btreq));
if (ret < 0)
{
fprintf(stderr, "ERROR: ioctl(SIOCBTSCANGET) failed: %d\n",
errno);
}
/* Show scan results */
else
{
FAR struct bt_scanresponse_s *rsp;
int i;
int j;
int k;
printf("Scan result:\n");
for (i = 0; i < btreq.btr_nrsp; i++)
{
rsp = &result[i];
printf("%2d.\taddr: "
"%02x:%02x:%02x:%02x:%02x:%02x type: %d\n",
i + 1,
rsp->sr_addr.val[5], rsp->sr_addr.val[4],
rsp->sr_addr.val[3], rsp->sr_addr.val[2],
rsp->sr_addr.val[1], rsp->sr_addr.val[0],
rsp->sr_addr.type);
printf("\trssi: %d\n", rsp->sr_rssi);
printf("\tresponse type: %u\n", rsp->sr_type);
printf("\tadvertiser data:");
for (j = 0; j < rsp->sr_len; j += 16)
{
if (j > 0)
{
printf("\t ");
}
for (k = 0; k < 16 && (j + k) < rsp->sr_len; k++)
{
printf(" %02x", rsp->sr_data[j + k]);
}
printf("\n");
}
}
}
close(sockfd);
}
}
/****************************************************************************
* Name: btsak_cmd_scanstop
*
* Description:
* Scan stop command
*
****************************************************************************/
static void btsak_cmd_scanstop(FAR struct btsak_s *btsak, FAR char *cmd,
int argc, FAR char *argv[])
{
struct btreq_s btreq;
int sockfd;
int ret;
/* Perform the IOCTL to stop scanning and flush any buffered responses. */
memset(&btreq, 0, sizeof(struct btreq_s));
strncpy(btreq.btr_name, btsak->ifname, IFNAMSIZ);
sockfd = btsak_socket(btsak);
if (sockfd >= 0)
{
ret = ioctl(sockfd, SIOCBTSCANSTOP,
(unsigned long)((uintptr_t)&btreq));
if (ret < 0)
{
fprintf(stderr, "ERROR: ioctl(SIOCBTSCANSTOP) failed: %d\n",
errno);
}
}
close(sockfd);
}
/****************************************************************************
* Public functions
****************************************************************************/
/****************************************************************************
* Name: btsak_cmd_scan
*
* Description:
* scan [-h] <start [-d] |get|stop> command
*
****************************************************************************/
void btsak_cmd_scan(FAR struct btsak_s *btsak, int argc, FAR char *argv[])
{
int argind;
/* Verify that an option was provided */
argind = 1;
if (argc < 2)
{
fprintf(stderr, "ERROR: Missing scan command\n");
btsak_scan_showusage(btsak->progname, argv[0], EXIT_FAILURE);
}
/* Check for command */
if (strcmp(argv[argind], "-h") == 0)
{
btsak_scan_showusage(btsak->progname, argv[0], EXIT_SUCCESS);
}
else if (strcmp(argv[argind], "start") == 0)
{
btsak_cmd_scanstart(btsak, argv[0], argc - argind, &argv[argind]);
}
else if (strcmp(argv[argind], "get") == 0)
{
btsak_cmd_scanget(btsak, argv[0], argc - argind, &argv[argind]);
}
else if (strcmp(argv[argind], "stop") == 0)
{
btsak_cmd_scanstop(btsak, argv[0], argc - argind, &argv[argind]);
}
else
{
fprintf(stderr, "ERROR: Unrecognized scan command: %s\n", argv[argind]);
btsak_scan_showusage(btsak->progname, argv[0], EXIT_FAILURE);
}
}
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