#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <stdbool.h>
#include <arpa/inet.h>
#include <pthread.h>

void* do_work(void *arg)
{
int *port = (int *) arg;

int listen_socket = socket(AF_INET, SOCK_STREAM, 0);
int one = 1;
setsockopt(listen_socket, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one));

struct sockaddr_in serv_addr;
memset(&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = INADDR_ANY;
serv_addr.sin_port = htons(*port);

int ret = bind(listen_socket, (struct sockaddr *) &serv_addr, sizeof(serv_addr));
listen(listen_socket, 5);

struct sockaddr_in cli_addr;
memset(&cli_addr, 0, sizeof(cli_addr));
int addr_length = sizeof(cli_addr);

do
{
int cli_sock = accept(listen_socket, (struct sockaddr *) &cli_addr, (socklen_t *) &addr_length);
close(cli_sock);
} while (true);

close(listen_socket);

return 0;
}

int main(int ac, const char *av[])
{
int port = atoi(av[1]);

const int MAX_THREADS = 10;
pthread_t tid[MAX_THREADS];
for (int i = 0; i < MAX_THREADS; i++) {
pthread_create(&tid[i], NULL, do_work, &port);
}

for (int i = 0; i < MAX_THREADS; i++) {
pthread_join(tid[i], NULL);
}
return 0;
}