//source: https://www.geeksforgeeks.org/udp-server-client-implementation-c/

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

#define PORT     30000
#define MAXLINE 1024

// Driver code
int main() {
    int sockfd;
    char buffer[MAXLINE];
    char *hello = "Hello from client";
    struct sockaddr_in     servaddr;

    // Creating socket file descriptor
    if ( (sockfd = socket(AF_INET, SOCK_DGRAM, 0)) < 0 ) {
        perror("socket creation failed");
        exit(EXIT_FAILURE);
    }

    memset(&servaddr, 0, sizeof(servaddr));

    // Filling server information
    servaddr.sin_family = AF_INET;
    servaddr.sin_port = htons(PORT);
    servaddr.sin_addr.s_addr = inet_addr("192.168.1.7");
	for(;;)
	{
	    int n = 0;
		int len = sizeof(servaddr);
		printf("Sending hello message.\n");
	    sendto(sockfd, (const char *)hello, strlen(hello),
	        MSG_CONFIRM, (const struct sockaddr *) &servaddr,
	            sizeof(servaddr));
		sleep(1);
	}
    close(sockfd);
    return 0;
}