C++ UDP Sender

main.cpp

#include <iostream>
#include <unistd.h>
#include <arpa/inet.h>

#include <errno.h>
#include <string.h>

#define SENDER_PORT     55555
#define RECEIVER_PORT   55554
#define RECEIVER_ADDR   "0.0.0.0"
#define MESSAGE         "Hello from UDP!\n"

int main()
{
    int sock;
    if ((sock = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) >= 0) {

        sockaddr_in sender_addr;
        sender_addr.sin_family = AF_INET;
        sender_addr.sin_port = htons(SENDER_PORT);

        if (bind(sock, (sockaddr*)(&sender_addr), sizeof(sender_addr)) >= 0) {

            sockaddr_in receiver_addr;
            receiver_addr.sin_family = AF_INET;
            receiver_addr.sin_port = htons(RECEIVER_PORT);

            if (inet_pton(AF_INET, "0.0.0.0", &receiver_addr.sin_addr) > 0) {
                if (sendto(sock, MESSAGE, strlen(MESSAGE), 0, (sockaddr*)(&receiver_addr), sizeof(receiver_addr)) > 0)
                    std::cout << "Message sent" << std::endl;
                else
                    std::cout << "Unable To Send Data..." << std::endl;
            }

            close(sock);
            return 0;
        }
    }

    std::cout << errno << " - " << strerror(errno) << std::endl;
    return -1;
}