#include <arpa/inet.h>
#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>


void ERROR(const char* str)
{
    fprintf(stderr, "%s: %s\n", str, strerror(errno));  // NOLINT(*-err33-c)
    exit(EXIT_FAILURE);
}


int main(int argc, char* argv[])
{
    int sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
    if (sock_fd < 0)
        ERROR("socket error");

    if (argc != 2) {
        fprintf(stderr, "usage: %s number_of_datagrams\n", argv[0]);  // NOLINT(*-err33-c)
        return EXIT_FAILURE;
    }

    struct sockaddr_in server_address = { 0 };
    server_address.sin_family = AF_INET;
    server_address.sin_port = htons(32345);
    inet_pton(AF_INET, "127.0.0.1", &server_address.sin_addr);

    char* message = "Hello server!";
    size_t message_len = strlen(message);
    for (int i = 0; i < strtol(argv[1], NULL, 10); i++) {
        if (sendto(sock_fd, message, message_len, 0, (struct sockaddr*) &server_address, sizeof(server_address)) != message_len)
            ERROR("sendto error");
    }

    close(sock_fd);
    return EXIT_SUCCESS;
}