I'm slowly building a hardware-based web server.

Feel free to look around, but it is not yet anywhere near working

Status

• ARP replies sent at Gigabit speeds
• ICMP is working at Gigabit speeds
• UDP RX & TX works at Gigabit speeds

TODO LIST OF MINOR ISSUES THAT I DON'T WANT TO FORGET

Inbound packet processing

• Inbound packet reception errors should cause the packet to be dropped.

• Inbound packet CRC verification is not being performed - should cause packet to dropped

• Inbound packet MAC filtering not coded - should only accept packets for 'our_mac' or the broadcast MAC. This could be handled the same as CRC or reception errors (where the FIFO can be rolled back). Doing this in one place could save resources.

TCP/IP Session protocol

• Can establish a TCP/IP session
• Sends ACKs for incoming data
• Currently listens on port 80 for any incoming connections
• Replies with 'FPGA says "Hi"\r\n' to any incoming packets that contains data
• Tears down session when remote end closes

TCP/IP packet support - mostly finished

• TCP RX IP Checksum is not being validated
• TCP RX TCP Checksum is not being validated

UDP Support - mostly finished

• UDP TX cannot send a packet without any data

• UDP RX IP Checksum is not being validated

• UDP RX UDP Checksum is not being validated

• UDP RX of a packet with no data will not result in anything that the consuming design can see.

ICMP Support - mostly finished

• ICMP 'echo request' is not validating that the IP checksum is correct
• ICMP 'echo request' is not validating that the ICMP length field is correct.
• ICMP 'echo request' is not validating that the ICMP checksum is correct

Outbound packet processing

• Outbound packets are not being sent correctly for 10 & 100Mbps speed. This requies a 4k FIFO, which will block the arbiter when less than 1600 entries are free (enough for a packet and some loop latency)