Hello,
You would need to implement a switch/bridge. LWIP is an IP stack which
is something quite different.
Implementing a L2 bridge is not difficult but you do need to know the
theory and I suggest a lot of reading. I have implemented bridges on
Xilinx FPGA's many times, with or without LWIP. If you need to
receive/send IP packets LWIP can be placed on top of your switch code.
I can recommend "The Switch Book" by Rich Seifert, ISBN 0-471-34586-5.
Everything you need to know about Ethernet switching and much much more.
Regards,
Eric.
On 13-12-2022 17:50, Александр via lwip-users wrote:
Hello!
I am trying to implement dual ethernet interface device on Xilinx
baremetal logic. I’v already implement receiving data from both of two
interfaces but now I want to realize forwarding from one interface to
another. I’v connected to 1st interface and try to ping the second
one. On wireshark I see arp requests that have no responses.
May be problem is in forwarding of broadcast messages?
#if IP_FORWARD
/* non-broadcast packet? */
if (!ip4_addr_isbroadcast(ip4_current_dest_addr(), inp)) {
/* try to forward IP packet on (other) interfaces */
ip4_forward(p, (struct ip_hdr *)p->payload, inp);
} else
#endif /* IP_FORWARD */
I can not understand this part. Why do we forward only unicast messages?
Sorry, i am niewbe in this stuff
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