> I know that's not an argument in favour of il,
> but there ain't anything else is there?

without doing a survey, linux has added three new ip protocols since the 
beginning of the
year.  dccp, sctp and tipc.  the only one that is smaller than tcp is dccp and 
it doesn't
provide for retransmission.  (it's intended for streaming content, i believe.)

linux 2.6.17
        proto   ip4 linecount   features
        udp     1594
        tcp     14628

        dccp    8224            congestion controlled, unreliable
        sctp    29139           reliable, mtu-aware, in-order + packet 
bundling, multipath
        tipc    18175           "transparent" ipc.

oh, for comparison's sake

cpu kernel:
        udp     647
        il      1408
        tcp     3177

- erik

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