prosody-modules
d814cc183c40
mod_c2s_conn_throttle/mod_c2s_conn_throttle.lua

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mod_c2s_conn_throttle/mod_c2s_conn_throttle.lua @ 912:d814cc183c40

mod_incidents_handling: recommit after full test, cleaned it a bit as what I posted was regretfully an unfinished draft, replaced a lot of the fixed type fields used for fields description with desc elements (upstream prosody's util.dataforms will still strip those). Also moved auxiliary functions to a library.
author Marco Cirillo <maranda@lightwitch.org>
date Sun, 17 Feb 2013 19:28:47 +0100
parent 612:15763c1d085c
child 929:9eefbaba274d
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15763c1d085c mod_c2s_conn_throttle: renamed mod_c2s_auth_throttle, hooks at features and takes in account stream renegotiation.
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1 -- Clients Connection Throttler.
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2 -- Usage:
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3 -- Add the module into modules loaded into the virtual host section
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4 --
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5 -- cthrottler_logins_count = 3 -> number of logins attempt allowed
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6 -- cthrottler_time = 120 -> in x seconds
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7
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8 local time = os.time
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9 local in_count = {}
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10 local logins_count = module:get_option_number("cthrottler_logins_count", 3)
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11 local throttle_time = module:get_option_number("cthrottler_time", 60)
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12
15763c1d085c mod_c2s_conn_throttle: renamed mod_c2s_auth_throttle, hooks at features and takes in account stream renegotiation.
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13 local function handle_sessions(event)
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14 local session = event.origin
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15
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16 if not in_count[session.ip] and session.type == "c2s_unauthed" then
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17 in_count[session.ip] = { t = time(), c = 1 }
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18 elseif in_count[session.ip] and session.type == "c2s_unauthed" then
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19 if in_count[session.ip].starttls_c then in_count[session.ip].c = in_count[session.ip].starttls_c else in_count[session.ip].c = in_count[session.ip].c + 1 end
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20
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21 if in_count[session.ip].c > logins_count and time() - in_count[session.ip].t < throttle_time then
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22 module:log("error", "Exceeded login count for %s, closing connection", session.ip)
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23 session:close{ condition = "policy-violation", text = "You exceeded the number of connections/logins allowed in "..throttle_time.." seconds, good bye." }
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24 return true
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25 elseif time() - in_count[session.ip].t > throttle_time then
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26 in_count[session.ip] = nil ; return
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27 end
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28 end
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29 end
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30
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31 local function check_starttls(event)
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32 local session = event.origin
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33
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34 if in_count[session.ip] and type(in_count[session.ip].starttls_c) ~= "number" and session.type == "c2s_unauthed" then
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35 in_count[session.ip].starttls_c = 1
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36 elseif in_count[session.ip] and type(in_count[session.ip].starttls_c) == "number" and session.type == "c2s_unauthed" then
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37 in_count[session.ip].starttls_c = in_count[session.ip].starttls_c + 1
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38 end
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39 end
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40
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41 module:hook("stream-features", handle_sessions, 100)
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42 module:hook("stanza/urn:ietf:params:xml:ns:xmpp-tls:starttls", check_starttls, 100)