#include <sys/types.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>

main(int argc, char* argv[]) {
	int sock, i, l, on;
	struct sockaddr_in dst;
	
	sock = socket(AF_INET, SOCK_DGRAM, 0);
	if (sock < 0) {
		perror("err creating socket:");
		exit(1);
	}
	on = 1;
	if (setsockopt(sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof on) == -1) {
		perror("could not set SO_BROADCAST option:");
	}
	if (setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &on, sizeof on) == -1) {
		perror("could not set SO_REUSEADDR option:");
	}

	memset(&dst, 0, sizeof(struct sockaddr_in));
	dst.sin_family = AF_INET;
	dst.sin_port = htons(2345);
	dst.sin_addr.s_addr = inet_addr("172.30.255.255");
	l = sizeof(struct sockaddr_in);

	i = sendto(sock, argv[1], strlen(argv[1])+1, 0, &dst, l);
	if (i < 0) perror("erroare la send:");
	else printf("am trimis broadcast %d octeti!\n", i);
}