Make all peer messages constant message size #8893
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This requires access to dumpcap. On Ubuntu, at least, this means you need to be in the "wireshark" group. We may also need: sudo ethtool -K lo gro off gso off tso off Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Give us a single "next message" function to call. This will be useful when we want to write more than one at a time. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Do all the special treatment of the message type first. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This gives us finer control over write sizes: for now we just cap the write size. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
We're doing our own buffering now. We leave the is_urgent() function for two commits in the future though. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Messages are now constant. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Changelog-Added: Protocol: we now pad all peer messages to make them the same length.
This replaces our previous nagle-based toggling. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This is exactly what membuf is for: it handles expansion much more neatly. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Not sufficient, but definitely necessary for avoiding trivial observation.