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authorMatthew Wild <mwild1@gmail.com>2009-12-03 14:15:30 +0000
committerMatthew Wild <mwild1@gmail.com>2009-12-03 14:15:30 +0000
commit7b01ad22db0a52327df3b00961fbcab9144d66d8 (patch)
tree14405b98609118f10d11ea60f7879a6430a8fbdb /plugins
parent24cccd311d431c5500a3120b44571ef7b5869e23 (diff)
downloadprosody-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
Diffstat (limited to 'plugins')
-rw-r--r--plugins/mod_proxy65.lua23
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