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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_inet6_rx.c -o af_inet6_rx */
#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <arpa/inet.h>
#define MAX_PACKET_LEN 2048
int main(int argc, char *argv[]) {
int ret, sd;
ssize_t len;
struct sockaddr_in6 src, dst;
unsigned char buf[MAX_PACKET_LEN + 1];
socklen_t addrlen;
char ipv6[INET6_ADDRSTRLEN];
/* Create IPv6 address family socket for the SOCK_DGRAM type */
sd = socket(PF_INET6, SOCK_DGRAM, 0);
if (sd < 0) {
perror("socket");
return 1;
}
/* Prepare source and destination socket address structs */
memset(&dst, 0, sizeof(dst));
memset(&src, 0, sizeof(src));
src.sin6_family = AF_INET6;
src.sin6_addr = in6addr_any;
/* Port within the compressed port range for potential NHC UDP compression */
src.sin6_port = htons(61617);
/* Bind socket on this side */
ret = bind(sd, (struct sockaddr *)&src, sizeof(src));
if (ret) {
perror("bind");
close(sd);
return 1;
}
addrlen = sizeof(dst);
/* Infinite loop receiving IPv6 packets and print out */
while (1) {
len = recvfrom(sd, buf, MAX_PACKET_LEN, 0, (struct sockaddr *)&dst, &addrlen);
if (len < 0) {
perror("recvfrom");
continue;
}
buf[len] = '\0';
inet_ntop(AF_INET6, &(dst.sin6_addr), ipv6, INET6_ADDRSTRLEN);
printf("Received (from %s): %s\n", ipv6, buf);
}
shutdown(sd, SHUT_RDWR);
close(sd);
return 0;
}
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