Sounds like a plan. Unfortunately, I can't seem to get into the netfilter.kernelnotes.org site. Would you know if this is mirrored somewhere else? I especially need to see the documentation (obviously). >> Thanks for the idea. However, looking over the netfilter information, >> it seems that I can only specify certain TCP fields to mangle. >> I don't see where I can manipulate the checksum and/or data fields. >> Am I missing something? >> > >No, once you have a packet in userspace you have access to all the fields >in tcp.h.. including checksum. > >> >You can obviously use Netfilter (netfilter.kernelnotes.org) with queueing >> >rules in the OUTPUT chain. >> > >> >On Thu, 26 Apr 2001, Karl Williams wrote: >> > >> >> >> I need to replace the data field and the checksum field in a tcp packet with other information (not related to the socket or socket buffer). >> >> >> >> >Where is the packet originating from? Does it originate from a program on >> >> >your computer, or some other machine addressed to your computer, or just >> >> >forwarded through your computer? >> >> >> >> The packet itself is generated on my own machine. I assume it's using the TCP subroutines in the .../net/ipv4 directory. >> Get 250 color business cards for FREE! http://businesscards.lycos.com/vp/fastpath/ - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org
