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| author | Matthew Wild <mwild1@gmail.com> | 2009-12-03 14:15:30 +0000 |
|---|---|---|
| committer | Matthew Wild <mwild1@gmail.com> | 2009-12-03 14:15:30 +0000 |
| commit | 7b01ad22db0a52327df3b00961fbcab9144d66d8 (patch) | |
| tree | 14405b98609118f10d11ea60f7879a6430a8fbdb | |
| parent | 24cccd311d431c5500a3120b44571ef7b5869e23 (diff) | |
| download | prosody-7b01ad22db0a52327df3b00961fbcab9144d66d8.tar.gz prosody-7b01ad22db0a52327df3b00961fbcab9144d66d8.zip | |
mod_proxy65: Throttle connections to prevent senders flooding the server's buffers if the receiver doesn't receive fast enough
| -rw-r--r-- | plugins/mod_proxy65.lua | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/plugins/mod_proxy65.lua b/plugins/mod_proxy65.lua index a4e1798b..01ff9bef 100644 --- a/plugins/mod_proxy65.lua +++ b/plugins/mod_proxy65.lua @@ -80,6 +80,7 @@ function connlistener.onincoming(conn, data) transfers[sha].initiator = conn; session.sha = sha; module:log("debug", "initiator connected ... "); + throttle_sending(conn, transfers[sha].target); end conn:write(string.char(5, 0, 0, 3, sha:len()) .. sha .. string.char(0, 0)); -- VER, REP, RSV, ATYP, BND.ADDR (sha), BND.PORT (2 Byte) else @@ -253,3 +254,25 @@ end connlisteners.start(module.host .. ':proxy65'); component = componentmanager.register_component(host, handle_to_domain); +local sender_lock_threshold = 1024; +function throttle_sending(sender, receiver) + sender:pattern(sender_lock_threshold); + local sender_locked; + local _sendbuffer = receiver.sendbuffer; + function receiver.sendbuffer() + _sendbuffer(); + if sender_locked and receiver.bufferlen() < sender_lock_threshold then + sender:lock(false); -- Unlock now + sender_locked = nil; + end + end + + local _readbuffer = sender.readbuffer; + function sender.readbuffer() + _readbuffer(); + if not sender_locked and receiver.bufferlen() >= sender_lock_threshold then + sender_locked = true; + sender:lock(true); + end + end +end |