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

/**
 * @fn udp_send
 * @summary quick and dirty C++ function to send a udp packet to an address
 * @example udp_send("hello", 6 /* strlen("hello")+1 */, "127.0.0.1", 9898)
 */
bool udp_send(const char *data, int len, const char* host, unsigned port) {
    sockaddr_in servaddr;
    int fd = socket(AF_INET, SOCK_DGRAM, 0);
    if(fd < 0) return false; // failed to open a socket, permission issues?
    bzero(&servaddr,sizeof(servaddr));
    servaddr.sin_family = AF_INET;
    if (inet_aton(host, &servaddr.sin_addr)==0)
      return close(fd), false; // failed to parse the host address
    servaddr.sin_port = htons(port);
    if (sendto(fd, data, len, 0, (sockaddr*)&servaddr, sizeof(servaddr)) < 0)
        return close(fd), false; // send failed
    return close(fd), true;
}