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Packet sniffing
I am karimkhan , I have a problem with JPCAP. I get all packets using JPCAP library. Also i have installed winpcap.
Everything seems to be fine. but when i try to print the header and data of a packet, i get to see some junk characters. Guess its a machine language.
Packet pack = captor.getPacket();
if (pack instanceof TCPPacket) {
TCPPacket tcpPacket = (TCPPacket) pack;
System.out.println(tcpPacket.dst_ip);
System.out.println(tcpPacket.dst_port);
byte[] data = tcpPacket.data;
String isoData = new String(data); //, "ISO-8859-1"
System.out.println("Packet :"+ isoData);
writer.writePacket(pack);
"
Output looks like
�8����WG�#uiz�^|�6��Y���]�pg��[!���o���GN_ٳ���H@�"qn��{ f��L������ȯ�d�.)������b껛�C�4��S�1�M�;V��Ih^���2��U�Z�y��7}���E��[�>}�vq��_�/��
M�Q���ؿQWȠ8E}q!D:��:�ǟ�T���n�����;�t뽆~hs�&�E�1�a*���;���������Spyu1C7�D[՚����w�/D{~v�D���{O���o|z�o�����frAC���L�zh������.�"qn��{ f��~h���t�B��92�XW�N|=���-�W 0����n�Ѻ@?L�Č6F�����у�_�?�
"
The header and data is some junk. Can you help me out? What is the reason for this? How do i get a meaningful header and data of the packet after identifying the packet as TCP, UDP or ICMP etc..
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