1
0
mirror of https://github.com/RIOT-OS/RIOT.git synced 2024-12-29 04:50:03 +01:00
RIOT/examples/gnrc_networking_mac/mac.c
Mingjie Shen 51ff6c3675 all/gnrc: fix null pointer dereference
Check return values of following functions for null:
    - gnrc_netif_iter
    - gnrc_netif_hdr_build
    - gnrc_pktsnip_search_type
    - gnrc_netif_get_by_pid
    - gnrc_netif_hdr_get_netif
    - _nib_drl_get
2023-06-22 19:43:30 -04:00

53 lines
1.0 KiB
C

/*
* Copyright (C) 2018 Shuguo Zhuo
*
* This file is subject to the terms and conditions of the GNU Lesser
* General Public License v2.1. See the file LICENSE in the top level
* directory for more details.
*/
/**
* @ingroup examples
* @{
*
* @file
* @brief MAC shell commands
*
* @author Shuguo Zhuo <zhuosgzju@gmail.com>
*
* @}
*/
#include <stdio.h>
#include <inttypes.h>
#include "net/gnrc.h"
#include "net/gnrc/mac/types.h"
int mac_cmd(int argc, char **argv)
{
if (argc < 2) {
printf("usage: %s duty\n", argv[0]);
return 1;
}
if (strcmp(argv[1], "duty") == 0) {
#if (GNRC_MAC_ENABLE_DUTYCYCLE_RECORD == 1)
gnrc_netif_t *netif = NULL;
netif = gnrc_netif_iter(netif);
if (netif) {
msg_t msg;
msg.type = GNRC_MAC_TYPE_GET_DUTYCYCLE;
msg_send(&msg, netif->pid);
}
#else
puts("MAC: radio duty-cycle unavailable.");
#endif
}
else {
puts("error: invalid command");
}
return 0;
}