Mercurial > prosody-modules

annotate mod_register_dnsbl/mod_register_dnsbl.lua @ 2890:6412595e2046

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mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
author Kim Alvefur <zash@zash.se>
date Fri, 23 Feb 2018 21:56:42 +0100
parents 2dcc3079572c
children 84670bac7348
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rev   line source
2112
0890c4860f14 mod_register_dnsbl: Initial commit of module to check users registering against an DNS block list
Kim Alvefur <zash@zash.se>
parents:
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1 local adns = require "net.adns";
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6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
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parents: 2203
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2 local async = require "util.async";
6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
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parents: 2203
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3
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0890c4860f14 mod_register_dnsbl: Initial commit of module to check users registering against an DNS block list
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4 local rbl = module:get_option_string("registration_rbl");
0890c4860f14 mod_register_dnsbl: Initial commit of module to check users registering against an DNS block list
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5
0890c4860f14 mod_register_dnsbl: Initial commit of module to check users registering against an DNS block list
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6 local function reverse(ip, suffix)
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42b095dab626 mod_register_dnsbl: Fix matching pattern (Thanks Ge0rG)
Kim Alvefur <zash@zash.se>
parents: 2112
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7 local a,b,c,d = ip:match("^(%d+).(%d+).(%d+).(%d+)$");
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0890c4860f14 mod_register_dnsbl: Initial commit of module to check users registering against an DNS block list
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8 if not a then return end
0890c4860f14 mod_register_dnsbl: Initial commit of module to check users registering against an DNS block list
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9 return ("%d.%d.%d.%d.%s"):format(d,c,b,a, suffix);
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10 end
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11
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6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
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parents: 2203
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12 module:hook("user-registering", function (event)
6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
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parents: 2203
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13 local session, ip = event.session, event.ip;
6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
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parents: 2203
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14 if not ip then
6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
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parents: 2203
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15 session.log("debug", "Unable to check DNSBL when IP is unknown");
6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
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parents: 2203
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16 return;
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17 end
6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
Kim Alvefur <zash@zash.se>
parents: 2203
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18 local rbl_ip, err = reverse(ip, rbl);
6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
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parents: 2203
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19 if not rbl_ip then
6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
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parents: 2203
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20 session.log("debug", "Unable to check DNSBL for ip %s: %s", ip, err);
6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
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parents: 2203
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21 return;
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22 end
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23
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6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
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parents: 2203
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24 local wait, done = async.waiter();
6412595e2046 mod_register_dnsbl: Use async support in trunk to actually block registration if a positive match is found in the DNSBL
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parents: 2203
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25 adns.lookup(function (reply)
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parents: 2203
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26 if reply and reply[1] and reply[1].a then
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parents: 2203
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27 session.log("debug", "DNSBL response: %s IN A %s", rbl_ip, reply[1].a);
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parents: 2203
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28 session.log("info", "Blocking %s from registering %s (dnsbl hit)", ip, event.username);
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29 event.allowed = false;
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30 event.reason = "Blocked by DNSBL";
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31 end
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parents: 2203
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32 done();
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33 end, rbl_ip);
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34 wait();
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35 end);