Mercurial > prosody-modules

annotate mod_c2s_conn_throttle/mod_c2s_conn_throttle.lua @ 4976:75b6e5df65f9

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various: Improve error reporting if missing file server module on 0.12 If there is some error loading net.http.files then it would be swallowed by the pcall and then it would proceed to trying mod_http_files, which might cause unexpected behavior on 0.12 Ref #1765
author Kim Alvefur <zash@zash.se>
date Mon, 18 Jul 2022 22:47:54 +0200
parents 7dbde05b48a9
children e79f9dec35c0
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15763c1d085c mod_c2s_conn_throttle: renamed mod_c2s_auth_throttle, hooks at features and takes in account stream renegotiation.
Marco Cirillo <maranda@lightwitch.org>
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1 -- Clients Connection Throttler.
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2 -- (C) 2012-2013, Marco Cirillo (LW.Org)
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4 local time = os.time
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5 local in_count = {}
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6 local logins_count = module:get_option_number("cthrottler_logins_count", 3)
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7 local throttle_time = module:get_option_number("cthrottler_time", 60)
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9 local function handle_sessions(event)
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10 local session = event.origin
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12 if not in_count[session.ip] and session.type == "c2s_unauthed" then
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13 in_count[session.ip] = { t = time(), c = 1 }
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14 elseif in_count[session.ip] and session.type == "c2s_unauthed" then
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15 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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17 if in_count[session.ip].c > logins_count and time() - in_count[session.ip].t < throttle_time then
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18 module:log("error", "Exceeded login count for %s, closing connection", session.ip)
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19 session:close{ condition = "policy-violation", text = "You exceeded the number of connections/logins allowed in "..throttle_time.." seconds, good bye." }
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20 return true
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21 elseif time() - in_count[session.ip].t > throttle_time then
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22 in_count[session.ip] = nil ; return
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23 end
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24 end
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25 end
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27 local function check_starttls(event)
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28 local session = event.origin
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30 if in_count[session.ip] and type(in_count[session.ip].starttls_c) ~= "number" and session.type == "c2s_unauthed" then
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31 in_count[session.ip].starttls_c = 1
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32 elseif in_count[session.ip] and type(in_count[session.ip].starttls_c) == "number" and session.type == "c2s_unauthed" then
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33 in_count[session.ip].starttls_c = in_count[session.ip].starttls_c + 1
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34 end
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35 end
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37 module:hook("stream-features", handle_sessions, 100)
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38 module:hook("stanza/urn:ietf:params:xml:ns:xmpp-tls:starttls", check_starttls, 100)