This establishes a pre-close extension check to allow an extension to
veto a close. x-google-mux then uses this to stop ch1 going down
(subchannel 1 is the original socket connection that turns into a mux
parent) if it has active mux children; it just marks ch1 as closed in
its conn struct in that case and returns 1 from the callback to veto.
Code is also added to take care of the case ch1 is 'closed', and the
last child is subsequently closed, it actively calls close on the mux
parent then.
Signed-off-by: Andy Green <andy@warmcat.com>
This also changes the wsi_children array to be indexed by subchannel - 2,
non-existent channels are NULL in there and highest_child_subchannel
is a highwater mark for the highest subchannel ever used. That way we
can immediately get the wsi for a subchannel at the cost of some extra
sparse skipping during management.
This also takes care of scanning for empty slots on allocation and
NULLing on close of subchannel instead of deletion.
Signed-off-by: Andy Green <andy@warmcat.com>
This is initial x-google-mux support. It's disabled by default
since it's very pre-alpha.
1) To enable it, reconfigure with --enable-x-google-mux
2) It conflicts with deflate-stream, use the -u switch on
the test client to disable deflate-stream
3) It deviates from the google standard by sending full
headers in the addchannel subcommand rather than just
changed ones from original connect
4) Quota is not implemented yet
5) Close of subchannel is not really implemented yet
6) Google opcode 0xf is changed to 0x7 to account for
v7 protocol changes to opcode layout
However despite those caveats, in fact it can run the
test client reliably over one socket (both dumb-increment
and lws-mirror-protocol), you can open a browser on the
same test server too and see the circles, etc.
Signed-off-by: Andy Green <andy@warmcat.com>
