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Added explanation of changed semantics when using dummynets.

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gardners 2012-06-15 15:09:12 +09:30
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6
README.DUMMYNETS
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@ -1,3 +1,5 @@
@PGS/20120615
Sometimes it is helpful to run more than one servald instance on a given machine
for debugging purposes. To make this easier, there is a dummy interface driver
that servald knows about. To use it:
@ -8,3 +10,7 @@ that servald knows about. To use it:
% servald config set interfaces "+eth0,+>../dummynet0"
3. Run each servald instance. They should now use the dummy network.
NOTE: Because dummynets are files, not sockets, poll/select does not work on them. As a result the main overlay loop has slightly different behaviour and timing characteristics when a dummynet is in use.
TODO: Convert dummynet interface to use a unixdomain socket, and a simple dummynet server that reflects packets among the clients connected, so that all socket semantics (including use of poll/select) are preserved.