I don't know anything about libpcap, so I have a few questions for the expert <grin>.
Will it handle all Etherent frames? As a bridge, that is what I need.
Will it allow me to gracefully drop stuff on the floor? I'm assuming the Ethernet bridge code in the kernel will do that, I'm not sure of the effect in libpcap.
I'm also assuming that I could not use IPchains if I do libpcap. That might be worth a tradeoff.
Finally, just for curiosity sake, what Major, Minor numbers should the /dev/tap entries be? I have not yet had anyone be able to answer that question, and it puzzles me.
thanks,
Wade
On Mon, May 4, 2009 at 6:40 PM, richardvoigt@xxxxxxxxx <richardvoigt@xxxxxxxxx> wrote:
You should probably just use libpcap to receive all packets from each interface, and SOCK_RAW to send. This should be a more efficient of getting packets to usermode than using bridging.On Mon, May 4, 2009 at 9:47 AM, Wade Maxfield <wmaxfield@xxxxxxxxx> wrote:
_______________________________________________
I'm trying to use bridging and TUN/TAP on uClinux on Nios processor, on an Altera fpga.
I downloaded the source for tunctl and it compiled and runs just fine.
It says it created tap0, tap1, tap2, etc., but they don't show up in the /dev directory.
I'm assuming because there is no demon to create these entries.
I looked at Ubuntu, and saw the /dev/tapx entries are major, minor 36,16.
However, the /dev/net/tun in the uClinux is 200,10.
My question is this: If I create /dev/tap0 in the /dev directory, which Major,Minor number should I give it?
I'm a little fuzzy on this. I'm assuming if the Major/Minor numbers are wrong, the brctl program won't be able to use the tap0 interface.
I want to do this, ultimately:
[ethernet]----[kernel bridge]---[tap]---(user program)------data link------(user program)---[tap]---[kernel bridge]--[ethernet]
The data link is non standard and proprietary. The goal is to bridge the two ethernets.
Can someone give me some heads up? Any pointers would be appreciated!!!
thanks,
Wade
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