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/*
* IEEE 802.15.4 socket example
*
* Copyright (C) 2016 Samsung Electronics Co., Ltd.
*
* Author: Stefan Schmidt <stefan@osg.samsung.com>
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* gcc af_packet_tx.c -o af_packet_tx */
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <net/if.h>
#include <linux/if_packet.h>
#include <arpa/inet.h>
#ifndef ETH_P_IEEE802154
#define ETH_P_IEEE802154 0x00F6
#endif
#define MAX_PACKET_LEN 127
int main(int argc, char *argv[]) {
int ret, sd;
ssize_t len;
struct sockaddr_ll sll;
struct ifreq ifr;
unsigned char buf[MAX_PACKET_LEN + 1];
/* Create AF_PACKET address family socket for the SOCK_RAW type */
sd = socket(PF_PACKET, SOCK_RAW, htons(ETH_P_IEEE802154));
if (sd < 0) {
perror("socket");
return 1;
}
/* Using a monitor interface here results in a bad FCS and two missing
* bytes from payload, using the normal IEEE 802.15.4 interface here */
strncpy(ifr.ifr_name, "wpan0", IFNAMSIZ);
ret = ioctl(sd, SIOCGIFINDEX, &ifr);
if (ret < 0) {
perror("ioctl");
close(sd);
return 1;
}
/* Prepare destination socket address struct */
memset(&sll, 0, sizeof(sll));
sll.sll_family = AF_PACKET;
sll.sll_ifindex = ifr.ifr_ifindex;
sll.sll_protocol = htons(ETH_P_IEEE802154);
/* Bind socket on this side */
ret = bind(sd, (struct sockaddr *)&sll, sizeof(sll));
if (ret < 0) {
perror("bind");
close(sd);
return 1;
}
/* Construct raw packet payload, length and FCS gets added in the kernel */
buf[0] = 0x21; /* Frame Control Field */
buf[1] = 0xc8; /* Frame Control Field */
buf[2] = 0x8b; /* Sequence number */
buf[3] = 0xff; /* Destination PAN ID 0xffff */
buf[4] = 0xff; /* Destination PAN ID */
buf[5] = 0x02; /* Destination short address 0x0002 */
buf[6] = 0x00; /* Destination short address */
buf[7] = 0x23; /* Source PAN ID 0x0023 */
buf[8] = 0x00; /* */
buf[9] = 0x60; /* Source extended address ae:c2:4a:1c:21:16:e2:60 */
buf[10] = 0xe2; /* */
buf[11] = 0x16; /* */
buf[12] = 0x21; /* */
buf[13] = 0x1c; /* */
buf[14] = 0x4a; /* */
buf[15] = 0xc2; /* */
buf[16] = 0xae; /* */
buf[17] = 0xAA; /* Payload */
buf[18] = 0xBB; /* */
buf[19] = 0xCC; /* */
/* Send constructed packet over binded interface */
len = send(sd, buf, 20, 0);
if (len < 0) {
perror("send");
}
shutdown(sd, SHUT_RDWR);
close(sd);
return 0;
}
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