Blöde Compler Meldung

[li0n]

Hi.
Ich bastle grade an nem Tool das dem -3 Angriff (arpreplay) von aireplay sehr ähnelt.
Problem:
ich bekomme diese Meldung beim Compilen:

In file included from send.h:15,
                 from main.c:1:
sniff.h:24: error: variably modified ‘pack’ at file scope

sniff.h sieht so aus:

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

#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <netinet/in.h>
#include <netinet/ip.h>
#include <netinet/tcp.h>
#include <arpa/inet.h>
#include <net/ethernet.h>
#include <arpa/inet.h>
#include <errno.h>

//----------------------------------------------------------------------------

void sniff();
void choosepack();

//----------------------------------------------------------------------------

  int packsiz = 12000;
  char pack[packsiz];

//----------------------------------------------------------------------------

void sniff() {
  int sock;
  //this is the raw socket we want to sinff from:
  if((sock = socket(AF_INET, SOCK_PACKET, htons(0x3))) < 0) {
    perror("Couldn't create a socket for sniffing!!!");
    exit(EXIT_FAILURE);
  }
  //now we read from the socket:
  read(sock, pack, packsiz);
}

//----------------------------------------------------------------------------

void choosepack() {
  struct ether_header *eth = (struct ether_header*)pack;
  struct iphdr *ip = (struct iphdr*)(pack + sizeof(struct ether_header));
  struct tcphdr *tcp = (struct tcphdr*)(pack + sizeof(struct tcphdr) + sizeof(struct iphdr));
  char *pay = (pack + sizeof(struct tcphdr) + sizeof(struct iphdr) + sizeof(struct  tcphdr));
  char yn[0];
  while(1) {
    memset(pack, '\0', packsiz);
    sniff();
    printf("SRC MAC: %x:%x:%x:%x:%x:%x\n", eth -> ether_shost[0], eth -> ether_shost[1], eth -> ether_shost[2], eth -> ether_shost[3], eth -> ether_shost[4], eth -> ether_shost[5]);
    printf("DST MAC: %x:%x:%x:%x:%x:%x\n", eth -> ether_dhost[0], eth -> ether_dhost[1], eth -> ether_dhost[2], eth -> ether_dhost[3], eth -> ether_dhost[4], eth -> ether_dhost[5]);
    printf("SRC IP: %s\n", inet_ntoa(*(struct in_addr*) &ip -> saddr)); //print the source IP
    printf("DST IP: %s\n", inet_ntoa(*(struct in_addr*) &ip -> daddr)); //print the destination IP
    printf("use packet? [y/n]");
    fgets(yn,sizeof(yn),stdin);
    if(strcmp(yn,"y") == 0) {
      return;
    }
  }
}

//----------------------------------------------------------------------------

hoffe mir kann da einer Helfen :S

greez li0n