CNetworking.cpp

#include <cstdio>
#include <cstdlib>
#include <cstring>
#include <cctype>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <unistd.h>
#include <iostream>
#include <climits>
using namespace std;

#include "CMyMove.h"
#include "CCommand.h"
#include "CNetworking.h"

CNetworking::CNetworking() : host_ip(""),host_port(0) {
}


int openCliSocket ( const char * srvName, int srvPort )
{
  struct addrinfo * ai;
  char srvPortText[10];

  snprintf ( srvPortText, sizeof ( srvPortText ), "%d", srvPort );

  if ( getaddrinfo ( srvName, srvPortText, NULL, &ai ) != 0 )
  {
    printf ( "getaddrinfo" );
    return -1;
  }

  int s = socket ( ai -> ai_family, SOCK_STREAM, 0 );
  if ( s == -1 )
  {
    freeaddrinfo ( ai );
    printf ( "socket" );
    return -1;
  }

  if ( connect ( s, ai -> ai_addr, ai -> ai_addrlen ) != 0 )
  {
    close ( s );
    freeaddrinfo ( ai );
    printf ( "connect" );
    return -1;
  }
  freeaddrinfo ( ai );
  return s;
}

CMyMove CNetworking::getMove(const int cliSocket) const {

    char buffer[10] = { 0 };
    int l = recv ( cliSocket, buffer, sizeof ( buffer ), 0 );
    if(l<=0){
        cout << "Přijat špatný move." << endl;
        return CMyMove(-1,-1,-1,-1);
    }
    
    if(strcmp(buffer,"EXIT")==0)
        return CMyMove(-2,-2,-2,-2);
    
    printf("Přijat následující move: %s|\n",buffer);
    
    CMyMove m(buffer);
    
    return m;
}

void CNetworking::sendCommand(const CCommand & command, int FromSock ) const {

    if(FromSock == -1)
        return;
    
    fd_set rd;
    FD_ZERO ( &rd );
    FD_SET ( FromSock, &rd );
    FD_SET ( STDIN_FILENO, &rd );

    if ( FD_ISSET ( FromSock, &rd ) )
    {
        
      char buffer[100];
     
      if(command.command==MAKEMOVE){        
        command.getMoveRef().tocstring(buffer);
        printf("Odesílám tento move: %s|\n",buffer);
      
        send ( FromSock, buffer, 5+1, 0 );
     }
      else if(command.command==EXIT){
          cout << "Odeslán EXIT požadavek."<<endl<<"Konec hry." << endl;
          strcpy(buffer,"EXIT");
          send ( FromSock, buffer, 4+1, 0 );
      }
     
    }
    
}


int CNetworking::getSocket() const{
    
    return openCliSocket ( host_ip.c_str(), host_port );
}


bool CNetworking::waitForStart(const int socket) const {

    char buffer[10] = {0};    
    
    cout << "Čekám na připojení protivníka..." << endl;
    int l = recv ( socket, buffer, sizeof ( buffer ), 0 );
    if(l<0){
        cout << "Ve funkci waitForStart nastala chyba." << endl;
        printf("Obdržen řetězec: |%s|\n",buffer);
        return false;
    }   
    else if(buffer[0]=='G' && buffer[1]=='0' && buffer[2]==0 ){
        cout << "Přijatý GO signál od serveru." << endl;
        return true;
    }
    
    return false;
}

COLOR CNetworking::recvPlayerColor(const int socket) const{

    char buffer[3] = { 0 };
    
    int l = recv ( socket, buffer, sizeof ( buffer ), 0 );
    if(l<=0){
        cout << "Chyba ve čtení barvy!" << endl;
        return WHITE;
    }
    
    else{
        
        if(buffer[0] == 'W' && buffer[1] == 0)
            return WHITE;
        else if(buffer[0] == 'B' && buffer[1] == 0)
            return BLACK;
        else {
            cout << "Přijata neznámá barva." << endl;
            return WHITE;
        }
    }
    
}

void CNetworking::inputServerInfo() {
 
    string host;
    while(host != "localhost"){
        cout <<"Zadejte IP serveru:"<<endl;
        cin >> host;
        if(!cin.good()){
            cin.clear();
            cin.ignore();
            cout<<"Špatný vstup."<<endl;
        }
        if(host != "localhost")
            cout << "Momentálně lze zadat pouze localhost." << endl;
    }
    
    host_ip = host;
    
    int port = 0;
    cout<<"Zadejte port pro hru na serveru:"<<endl;
            while( !(port >= 2000 && port <= 3000) ){
            cin>>port;
                if(!cin.good()){
                    cin.clear();
                    cin.ignore(INT_MAX,'\n');
                    cout<<"Vstup je číslo."<<endl;
                    port = 0;
                }
                if(!(port >= 2000 && port <= 3000)){
                    cout<<"Zadejte port v rozmezí 2000-3000."<<endl;
                    port = 0;
                }
            }
    
    host_port = port;
}