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TODO.md

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A list of remaining things to do

  • Improve the logger handling: add a replacement for perror

  • Improve the logger to redirect to file

  • Don't queue unicast ethernet frames to the current interface

    • Move it to the queuing function. Currently message can be queued in restore_mac_callback

  • Don't queue broadcast & multicast ethernet frames

    • Only queue message whose MAC is in the cache
    • Move it to the queuing function. Currently message can be queued in restore_mac_callback

  • Update the ARP cache based on gratiutous ARP

  • Don't send asynchronous CAM restoration frame for intercepted hosts

  • Force re-poisoning of hosts when a frame is received from one of them

  • In the restore_mac_callback, ensure that packets which must intercepted are sent through the IPC instead of being queued

  • Multi-thread the poisoning for effeciency. Currently on retransmission, the main thread may be blocked for 750ms if it doesn't succeed in restoring the CAM tables; meanwhile, poisoning doesn't happen anymore. Can have

    • one thread to retransmit not-targetted frames asynchronously
    • one thread to poison and retransmit from time to time

  • Add support for more than 2 intercepted hosts

  • Dynamically set the size of the reception frame buffer based on the MTU

  • Handle IPC socket permissions: full access to the socket may be dangerous because it may allow unprivileged users to inject raw packet

  • Add additional modes for poisoning, restoration and ARP cache discovery

    • Poisoning:
      • mere Ethernet frame
    • Restoration:
      • stealth: wait for a frame from the host
    • ARP cache:
      • retrieve local cache
      • stealth: wait for broadcasted ARP requests
      • semi-stealth: increase time between each ARP requests
      • user-input: cache given through commandline