#include <sys/types.h>
#include <sys/socket.h>
#include <stdio.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <string.h>

int main() {
  int s;
  struct sockaddr_in server, client;
  int c, l;

  s = socket(AF_INET, SOCK_STREAM, 0);
  if (s < 0) {
    printf("Eroare la crearea socketului server\n");
    return 1;
  }

  memset(&server, 0, sizeof(server));
  server.sin_port = htons(1234);
  server.sin_family = AF_INET;
  server.sin_addr.s_addr = INADDR_ANY;

  if (bind(s, (struct sockaddr *) &server, sizeof(server)) < 0) {
    printf("Eroare la bind\n");
    return 1;
  }

  listen(s, 5);

  l = sizeof(client);
  memset(&client, 0, sizeof(client));

  while (1) {
    char message[20], temp;
    int i, j;
    c = accept(s, (struct sockaddr *) &client, &l);
    printf("S-a conectat un client.\n");
    // deservirea clientului
    if(fork()==0){
      recv(c, message, sizeof(message), MSG_WAITALL);
      for (i = 0, j = strlen(message) - 1; i < j; i++, j--) {
          temp = message[i];
          message[i] = message[j];
          message[j] = temp;
      }
      send(c, message, sizeof(message), 0);
      close(c);
    }
    // sfarsitul deservirii clientului;
  }
}