#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>

#define MAX_DGRAM_SIZE 10000

static char buf[MAX_DGRAM_SIZE];

int main(int argc, char **argv)
{
	char *addr = NULL, *port = "9000";
	struct addrinfo *info, hints = {
		.ai_family   = AF_UNSPEC,
		.ai_socktype = SOCK_DGRAM,
		.ai_flags    = AI_PASSIVE,
	};
	int i, rc, sock;

	if (argc > 1)
		addr = argv[1];
	if (argc > 2)
		addr = argv[2];
	if (!addr) {
		fprintf(stderr, "usage: %s addr [port]\n", argv[0]);
		return EXIT_FAILURE;
	}

	rc = getaddrinfo(addr, port, &hints, &info);
	if (rc != 0) {
		fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rc));
		return EXIT_FAILURE;
	}

	sock = socket(info->ai_family, info->ai_socktype, info->ai_protocol);
	if (sock == -1) {
		perror("socket");
		return EXIT_FAILURE;
	}

	if (connect(sock, info->ai_addr, info->ai_addrlen) == -1) {
		perror("connect");
		return EXIT_FAILURE;
	}

	for (i = 0; i < MAX_DGRAM_SIZE; i++) {
		if (send(sock, buf, i+1, MSG_DONTWAIT) == -1) {
			if (errno != EAGAIN && errno != EINTR) {
				perror("send");
				return EXIT_FAILURE;
			}
		}
	}

	return 0;
}