[JAVA] problème JPCAP

Bonjour,
Je suis actuellement entrain de développer (dans le cadre d'un projet pour ma fac je précise) un programme permettant de sniffer et d'envoyer des trames arp. Je n'aime pas le c et ne connait pas le c++ donc je me suis tourné vers java et la librairie jpcap ( celle qui permet de forger ). Je teste actuellement la forge de paquets mais je rencontre un problème à l'exécution (bon courage pour la lecture je ne comprend rien ) :

#
# An unexpected error has been detected by Java Runtime Environment:
#
# EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x6d892831, pid=6444, tid=6484
#
# Java VM: Java HotSpot(TM) Client VM (1.6.0-b105 mixed mode, sharing)
# Problematic frame:
# V [jvm.dll+0xd2831]
#
# If you would like to submit a bug report, please visit:
# https://bugreport.java.com/bugreport/crash.jsp
#

--------------- T H R E A D ---------------

Current thread (0x00296400): JavaThread "main" [_thread_in_vm, id=6484]

siginfo: ExceptionCode=0xc0000005, reading address 0x00000000

Registers:
EAX=0x00000000, EBX=0x00296400, ECX=0x00000006, EDX=0x6d8927d0
ESP=0x0090f55c, EBP=0x6d9c5e60, ESI=0x00000000, EDI=0x0090f5e6
EIP=0x6d892831, EFLAGS=0x00010246

Top of Stack: (sp=0x0090f55c)
0x0090f55c: 0090f5e6 002964e8 0090fc60 00296400
0x0090f56c: 00000000 100039c1 100039cc 100039d6
0x0090f57c: 00296400 00000000 00000000 00000000
0x0090f58c: 0090f5f8 00000000 6d9c5e60 1000329f
0x0090f59c: 00000000 002964e8 0090fc60 0090fc64
0x0090f5ac: 6d9a9320 0000000e 0090fc60 10002e17
0x0090f5bc: 10002e47 0090fc60 00000000 00296400
0x0090f5cc: 2699b5d8 0090fc50 2699b5d8 00040000

Instructions: (pc=0x6d892831)
0x6d892821: 0c e8 c9 30 08 00 8b 74 24 28 85 f6 8b 44 24 24
0x6d892831: 8b 00 7c 54 8b 54 24 2c 85 d2 7c 4c 8b 78 08 8d

Stack: [0x008c0000,0x00910000), sp=0x0090f55c, free space=317k
Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
V [jvm.dll+0xd2831]

Java frames: (J=compiled Java code, j=interpreted, Vv=VM code)
j jpcap.JpcapSender.nativeSendPacket(Ljpcap/packet/Packet;)V+0
j jpcap.JpcapSender.sendPacket(Ljpcap/packet/Packet;)V+19
j arpSender.constructPacket()Ljpcap/packet/Packet;+271
j arpSender.main([Ljava/lang/String;)V+9
v ~StubRoutines::call_stub

--------------- P R O C E S S ---------------

Java Threads: ( => current thread )
0x02a7cc00 JavaThread "Low Memory Detector" daemon [_thread_blocked, id=2964]
0x02a78000 JavaThread "CompilerThread0" daemon [_thread_blocked, id=4776]
0x02a77000 JavaThread "Attach Listener" daemon [_thread_blocked, id=7992]
0x02a76400 JavaThread "Signal Dispatcher" daemon [_thread_blocked, id=6864]
0x02a71800 JavaThread "Finalizer" daemon [_thread_blocked, id=7108]
0x02a6d400 JavaThread "Reference Handler" daemon [_thread_blocked, id=260]
=>0x00296400 JavaThread "main" [_thread_in_vm, id=6484]

Other Threads:
0x02a64000 VMThread [id=5412]
0x02a7e400 WatcherThread [id=1004]

VM state:not at safepoint (normal execution)

VM Mutex/Monitor currently owned by a thread: None

Heap
def new generation total 960K, used 407K [0x22990000, 0x22a90000, 0x22e70000)
eden space 896K, 45% used [0x22990000, 0x229f5e48, 0x22a70000)
from space 64K, 0% used [0x22a70000, 0x22a70000, 0x22a80000)
to space 64K, 0% used [0x22a80000, 0x22a80000, 0x22a90000)
tenured generation total 4096K, used 0K [0x22e70000, 0x23270000, 0x26990000)
the space 4096K, 0% used [0x22e70000, 0x22e70000, 0x22e70200, 0x23270000)
compacting perm gen total 12288K, used 72K [0x26990000, 0x27590000, 0x2a990000)
the space 12288K, 0% used [0x26990000, 0x269a2050, 0x269a2200, 0x27590000)
ro space 8192K, 66% used [0x2a990000, 0x2aed9920, 0x2aed9a00, 0x2b190000)
rw space 12288K, 52% used [0x2b190000, 0x2b7d6130, 0x2b7d6200, 0x2bd90000)

Dynamic libraries:
0x00400000 - 0x00423000 C:\Program Files\Java\jdk1.6.0\bin\java.exe
0x7c910000 - 0x7c9c7000 C:\WINDOWS\system32\ntdll.dll
0x7c800000 - 0x7c905000 C:\WINDOWS\system32\kernel32.dll
0x77da0000 - 0x77e4c000 C:\WINDOWS\system32\ADVAPI32.dll
0x77e50000 - 0x77ee1000 C:\WINDOWS\system32\RPCRT4.dll
0x7c340000 - 0x7c396000 C:\Program Files\Java\jdk1.6.0\jre\bin\msvcr71.dll
0x6d7c0000 - 0x6da07000 C:\Program Files\Java\jdk1.6.0\jre\bin\client\jvm.dll
0x7e390000 - 0x7e420000 C:\WINDOWS\system32\USER32.dll
0x77ef0000 - 0x77f37000 C:\WINDOWS\system32\GDI32.dll
0x76ae0000 - 0x76b0f000 C:\WINDOWS\system32\WINMM.dll
0x76320000 - 0x7633d000 C:\WINDOWS\system32\IMM32.DLL
0x62dc0000 - 0x62dc9000 C:\WINDOWS\system32\LPK.DLL
0x753c0000 - 0x7542b000 C:\WINDOWS\system32\USP10.dll
0x77be0000 - 0x77c38000 C:\WINDOWS\system32\msvcrt.dll
0x6d310000 - 0x6d318000 C:\Program Files\Java\jdk1.6.0\jre\bin\hpi.dll
0x76ba0000 - 0x76bab000 C:\WINDOWS\system32\PSAPI.DLL
0x6d770000 - 0x6d77c000 C:\Program Files\Java\jdk1.6.0\jre\bin\verify.dll
0x6d3b0000 - 0x6d3cf000 C:\Program Files\Java\jdk1.6.0\jre\bin\java.dll
0x6d7b0000 - 0x6d7bf000 C:\Program Files\Java\jdk1.6.0\jre\bin\zip.dll
0x10000000 - 0x10028000 C:\WINDOWS\system32\Jpcap.dll
0x719f0000 - 0x71a07000 C:\WINDOWS\system32\WS2_32.dll
0x719e0000 - 0x719e8000 C:\WINDOWS\system32\WS2HELP.dll
0x02dd0000 - 0x02e11000 C:\WINDOWS\system32\wpcap.dll
0x02e20000 - 0x02e35000 C:\WINDOWS\system32\packet.dll
0x02e40000 - 0x02e50000 C:\WINDOWS\system32\WanPacket.dll
0x669b0000 - 0x669c1000 C:\WINDOWS\system32\NPPTools.dll
0x5f800000 - 0x5f8f2000 C:\WINDOWS\system32\MFC42u.DLL
0x774a0000 - 0x775dd000 C:\WINDOWS\system32\ole32.dll
0x770e0000 - 0x7716b000 C:\WINDOWS\system32\OLEAUT32.dll
0x76d10000 - 0x76d29000 C:\WINDOWS\system32\iphlpapi.dll
0x77bd0000 - 0x77bd8000 C:\WINDOWS\system32\VERSION.dll
0x61d70000 - 0x61d7e000 C:\WINDOWS\system32\MFC42LOC.DLL
0x673f0000 - 0x67401000 C:\WINDOWS\system32\npp\ndisnpp.dll
0x5b090000 - 0x5b0c8000 C:\WINDOWS\system32\uxtheme.dll
0x02ef0000 - 0x02f21000 C:\Program Files\F-Secure\Spam Control\fsscoepl.dll
0x7c9d0000 - 0x7d1f5000 C:\WINDOWS\system32\SHELL32.dll
0x77f40000 - 0x77fb6000 C:\WINDOWS\system32\SHLWAPI.dll
0x77390000 - 0x77493000 C:\WINDOWS\WinSxS\x86_Microsoft.Windows.Common-Controls_6595b64144ccf1df_6.0.2600.2982_x-ww_ac3f9c03\comctl32.dll
0x58b50000 - 0x58bea000 C:\WINDOWS\system32\comctl32.dll
0x17100000 - 0x17120000 c:\program files\f-secure\tnb\fstnb.dll
0x02f70000 - 0x02f99000 c:\program files\f-secure\common\fslapi.dll
0x02fb0000 - 0x02fc0000 C:\Program Files\F-Secure\Spam Control\fsscmso.eng
0x02fc0000 - 0x02fc7000 C:\Program Files\Macrogaming\SweetIM\mgAdaptersProxy.dll
0x74690000 - 0x746db000 C:\WINDOWS\system32\MSCTF.dll
0x76f80000 - 0x76fff000 C:\WINDOWS\system32\CLBCATQ.DLL
0x77000000 - 0x770d4000 C:\WINDOWS\system32\COMRes.dll
0x77fc0000 - 0x77fd1000 C:\WINDOWS\system32\Secur32.dll

VM Arguments:
java_command: arpSender
Launcher Type: SUN_STANDARD

Environment Variables:
CLASSPATH=.;C:\Program Files\Java\jre1.6.0_03\lib\ext\QTJava.zip
PATH=C:\GNAT\bin;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\Program Files\Fichiers communs\GTK\2.0\bin;C:\Program Files\QuickTime\QTSystem\;C:\Program Files\Satsuki Decoder Pack\filtres\divers
USERNAME=PIERRE HENRI
OS=Windows_NT
PROCESSOR_IDENTIFIER=x86 Family 15 Model 2 Stepping 9, GenuineIntel

--------------- S Y S T E M ---------------

OS: Windows XP Build 2600 Service Pack 2

CPU:total 1 family 15, cmov, cx8, fxsr, mmx, sse, sse2

Memory: 4k page, physical 521712k(209824k free), swap 1277976k(736608k free)

vm_info: Java HotSpot(TM) Client VM (1.6.0-b105) for windows-x86, built on Nov 29 2006 00:48:48 by "java_re" with unknown MS VC++:1310

voilà le code :

import java.io.*;
import java.lang.*;
import jpcap.*;
import jpcap.packet.*;

class arpSender {

private JpcapSender sender;

public arpSender(){

try{

NetworkInterface[] devices = JpcapCaptor.getDeviceList();

sender=JpcapSender.openDevice(devices[0]); ;
}
catch(IOException e){
e.printStackTrace();
}
}

public void constructPacket(){

ARPPacket p=new ARPPacket();

Integer proto=2054;

EthernetPacket ether=new EthernetPacket();

ether.frametype=EthernetPacket.ETHERTYPE_IP;

ether.src_mac=new byte[]{(byte)8,(byte)11,(byte)106,(byte)102,(byte)80,(byte)10};
ether.dst_mac=new byte[]{(byte)255,(byte)255,(byte)255,(byte)255 };

p.datalink=ether;
p.prototype=proto.shortValue();
p.sender_hardaddr=new byte[]{(byte)8,(byte)11,(byte)106,(byte)102,(byte)80,(byte)10};
p.sender_protoaddr=new byte[]{(byte)192,(byte)168,(byte)7,(byte)2 };
p.target_protoaddr=new byte[]{(byte)255,(byte)255,(byte)255,(byte)255 };

sender.sendPacket(p);

sender.close();

}

public static void main(String[] args){

arpSender a=new arpSender();

a.constructPacket();

}

}

Merci d'avance à ceux qui pourront me dire ce qui ne va pas