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Annotated edit history of MetaNetDesign version 8, including all changes. View license author blame.
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7 PerryLorier 1 Discussion document for replacement for wand/wansd
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3 Please note: This is related to the wand/wansd programs which are __only__ responsible for distributing and learning other peoples IP/port -> MAC translation. It in particular does not relate to the actual tunnel which is run by Etud, which uses the IP/port -> MAC translations provided to talk to it's peers.
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5 Please add any issues you can foresee, or pros and cons of any of the current issues.
8 MattBrown 6
7 [MattBrown]'s proposed replacement design for WAND/WANSD is at http://www.mattb.net.nz/metanet/protocol.txt
7 PerryLorier 8
9 !!! TCP vs UDP
10 TCP makes it harder to spoof source address, and allows things like SSL.
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12 TCP requires a connection to be made, either for each query/update (high overhead for both ends) or a persistant connection (more complex, deal with your remote end comming and going, firewalls timing out connections, etc etc).
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14 UDP is very simple and non-stateless, but has issues with updates not fitting into a single packet (means that we need to cope with / expect multiple packets for an update) and will have problems doing auth properly.
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18 !!! Client/Server vs "p2p"
19 !robustness - no reliance on single (or group) of machines
20 Although if a server (eg deuterium) does go down, the other routers can still talk to each other. Making the current wand talk to more than one wansd is a simple way to fix this, requires a timestamp to be provided by each wansd server (so the clients can pick the "upto date" entry if different entries are ever returned) and the wansd's to have a method to sync themselves to each other.
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22 ! Complexity
23 need n^2 paths if every peer talks to every other peer.
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25 ipt's routing protocol was n^2/2, not brilliant, but not too bad. I have better ideas of how to reduce this even further with what I've learnt from other routing protocols since then. Perhaps O(n)?
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27 AddToMe