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From: Olivier Monod <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED]
Subject: Problem with ICMP packet ECHO
Hello,
�
I have two NIC on my computer, and I capture every packets from the NIC
A and send them in the NIC B. So I try first �with an ICMP packet type
ECHO (ping). After the capture of one packet and before sending the
packet �in the other NIC, I change in the packet :
o������� the source MAC address with the MAC address of my �sender NIC�
o������� the dest. MAC address (with sendARP() I get the MAC address of
the destination)
o������� the source IP address with the IP address of my �sender NIC�
I don�t change :
o������� the IP identifier (why?)
o������� the IP checksum (even it�s false, I�ve got an answer with the
ping command)
o������� the ICMP packet
The problem is that the dest. Computer doesn�t answer, why ???
�
Thank you for your help.
�
Olivier
�
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