Trojak :-) – C / C++ – Fórum – Programujte.com

Len tak surfujem po nete a najdem tento zdrojak :

/*

  

  trojan - klasicky UDP klient - Windows verze 

  2006 (L) cZokL, mr [dot] czokl [at] gmail [dot] com



  ad komenty - u kazdy fce z knihovny winsock najdete zbezny popis a 

  odkaz na dokumentaci + nejake to info i u jinych veci



*/



#include <iostream>

#include <windows.h>

#include <string>

#include <cstdlib>



using namespace std ;



/* 

  BUFSIZE velikost BUFSIZE musi byt u serveru i klienta stejna

  aby nedcochazelo ke ztratam, u tehle kodu je zbytecny delat 

  header file pac by mel tak tri radky proto se tohle define 

  objevuje v obou kodech. 



*/



#define BUFSIZE 1024



inline void usage() {



  cout << "Usage: klient <hostname> <port>" ; 

  

}





int main(int argc, char *argv[]) {

  

  /*

  

  prebrani vstupnich parametru

  

  */

  

  if ( argc != 3 ) {

  

    cerr << "chybny pocet argumentu" << endl ;

    usage() ;

    exit(-1) ;

    

  }

  

  string hostname = argv[1] ;

  

  /* atoi() prevadi retezec na int cislo */

  

  int port = atoi(argv[2]) ;

  

  if ( port < 1 || port > 65536 ) {

  

    cerr << "port neni v rozsahu 1-65536" << endl ;

    usage() ;

    exit(-1) ;

  

  }  

       

      

  /*

  

  WSAStartup - incializace knihovny winsock - tuto fci je nutne volat pred pouzitim fci z knihovny 

  vstupni "MAKEWORD(2,2)" urcuje verzi pozadovane knihovny, misto toho lze take napsat WINSOCK_VERSION

  vystupni "wsadata" obsahuje info o knihovne 

  viz. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/wsastartup_2.asp

  

  */

  

  WSAData wsadata ;

  

  if( WSAStartup(MAKEWORD(2,2), &wsadata) != 0 ) {



    cerr << "Nepodarilo se inicializovat knihovnu winsock" ;



    exit(-1) ;



  }

  

  /*

  

  Struktura hostent se naplni po zavolani fci gethostby* 

  informacema jako je ip adresa nebo nazev hosta

  my pomoci toho prevedeme hostname na ip adresu

  viz. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/hostent_2.asp

  */

  

  

  hostent *H = gethostbyname(hostname.c_str())  ;

  if ( H ==  NULL  ) {



    cerr << "hostname neexistuje" << endl ;

    usage() ;

    exit(-1) ;



  }

  

  string ip = inet_ntoa(*(in_addr *)H->h_addr_list[0]) ; 

      

  /*

  

  struktura SOCKADDR_IN urcuje rodinu protokolu (AF_INET pro IPV4), 

  IP adresu a port, se kterym bude socket pracovat

  viz. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcmfc98/html/_mfc_sockaddr_in_structure.asp  

  htons() prevadi int hodnotu na network byte order -  prevod je nutny kuli little endian vs big endian

  viz. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/htons_2.asp

  inet_addr() prevadi const *char na network byte order ze stejneho duvodu 

  viz. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/inet_addr_2.asp

  a inet_ntoa() dela presne obracenou vec

  viz. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/inet_ntoa_2.asp

  

  */



  



  SOCKADDR_IN service ;

  service.sin_family = AF_INET ;

  service.sin_addr.s_addr = inet_addr(ip.c_str()) ; 

  service.sin_port = htons(port) ;



  /*

  

  definice typu SOCKET vypada asi takto : #define SOCKET int - imho zbytecnost

  fce socket vytvari socket descriptor(popisovac) - podobny jako prace se soubory, 

  pomoci neho cteme a zapisujeme z/do socketu

  AF_INET - urcuje rodinu protokolu ipv4, 

  konst. SOCK_DGRAM urcuje ze budeme pouzivat UDP protokol

  treti parametr nechame nulovy 

  viz. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/socket_2.asp

     

  */



  SOCKET sock = socket(AF_INET, SOCK_DGRAM, 0)  ;



  if( sock == INVALID_SOCKET) {

  

    cerr << "Nepodarilo se vytvorit socket descriptor " ;



    /*

    

    Funkce WSACleanup() deinicializuje knihovnu winsock

    

    */



    WSACleanup() ;

    exit(-1) ;



  }



  



  /*

  

  sento odesila packet, vlastne zapise data na socket aby si je mohla druha strana

  vyzvednout, 

  prebira soket deskrtiptor, data, ktera se maji poslat a pak urceni kam ze se maji odeslat 

  viz. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/sendto_2.asp

  

  nejdrive precteme z inputu nejaky komend ktery pak server u sebe provede

  

  */

  

  char buffer[BUFSIZE] ;

  cin.getline(buffer, BUFSIZE) ;

    

  if( sendto(sock, buffer, strlen(buffer) , 0, (sockaddr*) &service, sizeof(service) )  == SOCKET_ERROR ) {



    cerr << "Chyba pri odesilani dat" ;



    /*

    

    fce closetsocket() uzavira socket

    

    */

    closesocket(sock) ;

    WSACleanup() ;



    exit(-1) ;



  }



  /*

  

    recvfrom prijima data ze socketu, parametry sou prakticky stejne jako u sendto()

    viz. http://msdn.microsoft.com/library/default.asp?url=/library/en-us/winsock/winsock/recvfrom_2.asp 

  

  */



  int bytes ;

  int iSize = sizeof(service) ;



  if ( (bytes = recvfrom(sock, buffer, BUFSIZE, 0, (sockaddr*) &service, &iSize)) == SOCKET_ERROR) {



    cerr << "data nelze prijmout" << endl ;



    closesocket(sock) ;

    WSACleanup() ;



    exit(-1);



  }



  /* 

  

    dulezita vec - fce recvfrom() vraci pocet prijatych bitu, 

    a protoze buffer je zpocatku zaplnenej nesmyslama a potom 

    prikazem, ktery odesilame (viz. radek cin.getline(buffer, BUFSIZE))

    tak nastavime konec retezce za prijate bity aby se vypsalo jenom

    to co opravdu prislo     

  

  */



  buffer[bytes] = '\0' ;



  cout << buffer << endl ;

  

  closesocket(sock) ;

  WSACleanup() ;



  system("pause") ;



  return 0 ;



}

------ Build started: Project: trojan, Configuration: Debug Win32 ------

Compiling...

trojak.cpp

Linking...

trojak.obj : error LNK2019: unresolved external symbol _recvfrom@24 referenced in function _main

trojak.obj : error LNK2019: unresolved external symbol _closesocket@4 referenced in function _main

trojak.obj : error LNK2019: unresolved external symbol _sendto@24 referenced in function _main

trojak.obj : error LNK2019: unresolved external symbol _WSACleanup@0 referenced in function _main

trojak.obj : error LNK2019: unresolved external symbol _socket@12 referenced in function _main

trojak.obj : error LNK2019: unresolved external symbol _htons@4 referenced in function _main

trojak.obj : error LNK2019: unresolved external symbol _inet_addr@4 referenced in function _main

trojak.obj : error LNK2019: unresolved external symbol _inet_ntoa@4 referenced in function _main

trojak.obj : error LNK2019: unresolved external symbol _gethostbyname@4 referenced in function _main

trojak.obj : error LNK2019: unresolved external symbol _WSAStartup@8 referenced in function _main

C:\C++\trojan\Debug\trojan.exe : fatal error LNK1120: 10 unresolved externals

Build log was saved at "file://c:\C++\trojan\trojan\Debug\BuildLog.htm"

trojan - 11 error(s), 0 warning(s)

========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

prilinkuj si Ws2_32.lib. Daj si nastavenia kompilacie a k zoznamu libiek pripis aj tu

Bol by nejaky ochotny clovek ktory by mi poslal screen alebo napisal presnu cestu ? lebo tych nastaveni tam je tolko ze sa v tom ani pan Boh nevyzna :-)
priklad cesty ze ako to myslim (tools >> optios >> nieco)
Dik za pomoc ...

když nezvládneš ani nastavení tak co chceš dělat s trojanem? Pokud byl na netu zdojak tak ti to stopne kdejakej AV.

mna nezaujima ten trojan , mna zaujima preco mi to nejde skompilovat a preto potrebujem pomoc ...

No presne ti nepoviem lebo z novym Visual Studiom nemam uz vobec skusenosti nakolko uz nerobim s M$ ale ujo google poradil : http://web.engr.oregonstate.edu/~mjb/cs553/vcnet.html

project >> project properties >> configuration properties >> Linker >> Input >> Additional Dependencies
tam napiš tu libku

#pragma comment(lib, "nazev.lib")

Ok dik setkym uz mi to ide :-)

heh nemohol by mi nejaky skusenejsi poradit zaciatocnikovi ze odkial ste vedeli ze treba nalinkovat Ws2_32.lib do complimatora ???
Dik :..

ta vje niekto ?

To joker: daj to noveho vlakna. imho ani si neuviedol aky kompilator pouzivas ...

to joker: typovacka.. :D Cloveka napadne ze pouzivas M$ a tak si da msdn.microsoft.com/library.. tam si da vyhladat jednu s tych funkcii ktoru ti oznacil linker napriklad closesocket.To ti vipise dokumentaciu k tejto fcii kde sa uvadza aj to v akom *.h sa nachadza,v akej libke, ktore DLL je potrebne, a pre ktore OS je fcia podporovana.Nieje to ziaden zazrak len staci vediet hladat v dokumentaciach

Vid posledne info na :
http://msdn2.microsoft.com/en-us/library/ms737582.aspx

a co spravit ked to pise toto ???

------ Build started: Project: dfg, Configuration: Debug Win32 ------

Compiling...

dfg.cpp

.\dfg.cpp(4) : fatal error C1083: Cannot open include file: 'stdafx.h': No such file or directory

Build log was saved at "file://c:\C++\dfg\dfg\Debug\BuildLog.htm"

dfg - 1 error(s), 0 warning(s)

========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========

No tusim ze Visual C++ ma taku moznost ktora sa vola predkompilovane headre... tak by som skusil pozriet v nastaveniach prave to(stdafx.h je header na to urceny). Pozri sa ci je v dfg.cpp alebo v dfg.h includnuty spominany stdafx.h.. ak ano tak skontroluj ci ho mas vytvoreny v projekte.. ak nie tak ten include zmaz a v nastaveniach vypni moznost prekompilovania headrov.

Ale myslim ze tu lebsie poradi nejaky VisualC++ user lebsie nakolko som este kodil vo VC++ 6.0 a naposledy ked som si nainstaloval nove VisualC++ tak som sa az zlakol co je to zac..