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Codelist for each programming task

Link-layer: Packet I/O On Ethernet

  • Device management functions in khtcp/include/device.h.
  • Sending/receiving Ethernet II frames functions in khtcp/include/packetio.h.
  • Server/client model. Server code in khtcp/ and client code in khtcpc/.
    • The client and server communicates via a Unix Abstract Domain Socket (which will work independently when there are multiple network namespaces).

Network-layer: IP Protocol

  • Client side:
    • Sending/receiving IP packets functions in khtcpc/include/ip.h.
  • Server side:
    • Sending/receiving IP packets functions in khtcp/include/ip.h.
    • Manual routing table manipulation functions in khtcp/include/ip.h.
    • Routing algorithm (RIPv2) function in khtcp/include/rip.h and khtcp/src/rip.cc.

Transport-layer: UDP protocol

  • Client side:
    • Socket-like APIs (for SOCK_DGRAM) provided in khtcpc/include/socket.h.
  • Server side:
    • Sending/receiving IP packets functions in khtcp/include/udp.h.

Test/Evalutaion

To test, compile both client and server code. Run the test_server executable first, then run any of the test clients (you can run them concurrently) under the same network namespace.

  • Server-side:
    • Arping (ARP Ping) test program has been implemented to test Ethernet II functionality. Test program as khtcp/tests/test_arping.cc.
    • Test server program (direct startup, runs RIP and ARP reply) as khtcp/tests/test_server.cc.
  • Client-side Ethernet, ARP and IP sending/receiving has been implemented to test Client-Server functionality as:
    • khtcpc/tests/test_eth.cc for sending and receiving Ethernet frame
    • khtcpc/tests/test_arping.cc for client-side ARPing
    • khtcpc/tests/test_ip.cc for sending and receiving IP
    • khtcpc/tests/test_udp_send.cc for testing SOCK_DGRAM send.
    • khtcpc/tests/test_udp_recv.cc for testing SOCK_DGRAM recv.

The UDP tests shall generate packets that can be successfully delivered across the Internet (where normal UDP would work, including most NATs).