#include <assert.h>
#include <netdb.h>
#include <stdio.h>
#include <strings.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/types.h>
#include <sys/socket.h>

int
main(void)
{
	char buf[5] = "abcd";
	int fd;
	ssize_t sent_bytes;
	struct sockaddr_in dest_addr;

	fd = socket(AF_INET, SOCK_DGRAM, 0);
	assert(fd != -1);
	bzero(&dest_addr, sizeof(dest_addr));
	dest_addr.sin_family = AF_INET;
	dest_addr.sin_addr.s_addr = inet_addr("127.0.0.1");
	dest_addr.sin_port = htons(9876);
	sent_bytes = sendto(fd, &buf, sizeof(buf), 0,
	    (struct sockaddr *)&dest_addr, sizeof(dest_addr));
	printf("%zd\n", sent_bytes);
	return (0);
}