tcpp

Tell me some goals that sound good

• No ipv6
• Start with just two protocols: ipv4 and ARP
• Try to follow the core guidelines as much as possible
• Use Google Test for unit tests
• Dunno

Milestones (not necessarily in order):

• Parse ethernet frames
• Parse ARP packets
• Parse IP packets
• Parse TCP packets
• Implement TCP handshake
• Let the application set the ip link interface UP and add the ip addr
• Use epoll for read()

So, what the deal with RFC:s?

RFC7414 is something of a list of RFC:s that you might want or not want to implement.

List of RFC:s we probably want to implement:

• RFC793 - Core functionality (Is this deprecated, which would be better to use?)
• RFC1122 - Congestion control
• RFC791 - The IP Protocol
• RFC826 - ARP

Nice to haves:

• RFC2398 - Testing tools
• RFC2525 - Known problems, debug help

Other tips and tricks:

To set capabilities, run: sudo setcap CAP_NET_ADMIN=ep my_binary

To set tap interface in up state, run: sudo ip link set my_tap_interface up

To set ip addr for interface, run: sudo ip addr add x.x.x.x/netmask dev my_tap_interface

Status right now:

I am trying to add support for sending packets back to the client. When this is tested, and the whole chain is implemented from arp-handler and back to tcpp, we can answer an ARP request and show up in the kernels ARP table.