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<DIV><FONT face="Courier New">What is the size of the packets that are not
transmitted?</FONT></DIV>
<DIV><FONT face="Courier New"></FONT> </DIV>
<DIV><FONT face="Courier New">Have a nice day</FONT></DIV>
<DIV><FONT face="Courier New">GV</FONT></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: black"><B>From:</B>
<A title=irshadanver@hotmail.com href="mailto:irshadanver@hotmail.com">Irshad
Anver</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=winpcap-users@winpcap.org
href="mailto:winpcap-users@winpcap.org">winpcap-users@winpcap.org</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Monday, August 25, 2008 9:03
AM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> [Winpcap-users]
pcap_sendpacket() returns -1 and does not send the packet for rebuilt VLAN
packet</DIV>
<DIV><BR></DIV>Dear Sir,<BR> <BR>I have a problem and searched the
Internet and could not find a solution. pcap_sendpacket() returns -1 and does
not send the packet. In my application I have two NICs the first one is the
Internet NIC and the second one is the client NIC. Whenever I receive a packet
in the client NIC I modify the ip and send the same packet through the
Internet NIC. When I receive the packet from the Internet NIC we send the
packet to the correct client through client NIC. I also use ARP spoofing to
enable any client IP address to access the Internet. This is a sort of network
bridging application and it worked well till I tried to send VLAN packets. For
VLAN I connected the Client NIC to the trunk port of the switch to receive
VLAN Tag information. Now when I receive VLAN packets in client NIC, I note
the VLAN tag then I remove the VLAN tag and modifiy the ip address and send
the same through the Internet NIC. When I receive the reply from the Internet
NIC I send the packet to the client by adding the correct VLAN tag. I use a
local array of 2000 bytes to rebuild the packet with VLAN tag. First copy the
client IP addresses and the VLAN tag and then copy the rest of the packet from
the receievd packet from the Internet NIC. But after some packets Winpcap
returns -1 and refuse to send packet through the client NIC. I could not find
any answer and the reason. Please provid me with a
solution.<BR> <BR>Thank you in
advance.<BR> <BR>Regards,<BR>Irshad<BR><BR>
<HR>
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