Mercurial > prosody-modules

annotate mod_register_dnsbl/mod_register_dnsbl.lua @ 4340:7cd3b7ec59e9

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mod_http_oauth2: Rudimentary support for scopes (but not really) We don't support limiting access, but this change will inform the client what permissions the created token has (e.g. is the user an admin or not). There is some work in progress on real scope support.
author Matthew Wild <mwild1@gmail.com>
date Sat, 16 Jan 2021 19:47:22 +0000
parents 82482e7e92cb
children
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2112
0890c4860f14 mod_register_dnsbl: Initial commit of module to check users registering against an DNS block list
Kim Alvefur <zash@zash.se>
parents:
diff changeset
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
Kim Alvefur <zash@zash.se>
parents: 2203
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2 local async = require "util.async";
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84670bac7348 mod_register_dnsbl: Use util.net for IP address parsing
Kim Alvefur <zash@zash.se>
parents: 2890
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3 local inet_pton = require "util.net".pton;
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bf9fc41bf7ad mod_register_dnsbl: Add support for IPv6 DNSBL
Kim Alvefur <zash@zash.se>
parents: 2891
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4 local to_hex = require "util.hex".to;
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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
Kim Alvefur <zash@zash.se>
parents: 2203
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5
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parents:
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6 local rbl = module:get_option_string("registration_rbl");
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7
0890c4860f14 mod_register_dnsbl: Initial commit of module to check users registering against an DNS block list
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8 local function reverse(ip, suffix)
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parents: 2890
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9 local n, err = inet_pton(ip);
84670bac7348 mod_register_dnsbl: Use util.net for IP address parsing
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10 if not n then return n, err end
84670bac7348 mod_register_dnsbl: Use util.net for IP address parsing
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11 if #n == 4 then
84670bac7348 mod_register_dnsbl: Use util.net for IP address parsing
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12 local a,b,c,d = n:byte(1,4);
84670bac7348 mod_register_dnsbl: Use util.net for IP address parsing
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13 return ("%d.%d.%d.%d.%s"):format(d,c,b,a, suffix);
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bf9fc41bf7ad mod_register_dnsbl: Add support for IPv6 DNSBL
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parents: 2891
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14 elseif #n == 16 then
bf9fc41bf7ad mod_register_dnsbl: Add support for IPv6 DNSBL
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parents: 2891
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15 return to_hex(n):reverse():gsub("%x", "%1.") .. suffix;
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16 end
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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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parents:
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17 end
0890c4860f14 mod_register_dnsbl: Initial commit of module to check users registering against an DNS block list
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parents:
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18
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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
Kim Alvefur <zash@zash.se>
parents: 2203
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19 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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20 local session, ip = event.session, event.ip;
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82482e7e92cb mod_register_dnsbl: Handle missing session in user-registering event (thanks meaz)
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parents: 2892
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21 local log = (session and session.log) or module._log;
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parents: 2203
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22 if not ip then
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parents: 2892
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23 log("debug", "Unable to check DNSBL when IP is unknown");
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parents: 2203
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24 return;
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parents: 2203
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25 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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26 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
Kim Alvefur <zash@zash.se>
parents: 2203
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27 if not rbl_ip then
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parents: 2892
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28 log("debug", "Unable to check DNSBL for ip %s: %s", ip, err);
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parents: 2203
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29 return;
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30 end
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parents:
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31
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parents: 2203
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32 local wait, done = async.waiter();
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parents: 2203
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33 adns.lookup(function (reply)
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parents: 2203
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34 if reply and reply[1] and reply[1].a then
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parents: 2892
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35 log("debug", "DNSBL response: %s IN A %s", rbl_ip, reply[1].a);
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parents: 2892
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36 log("info", "Blocking %s from registering %s (dnsbl hit)", ip, event.username);
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Kim Alvefur <zash@zash.se>
parents: 2203
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37 event.allowed = false;
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parents: 2203
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38 event.reason = "Blocked by DNSBL";
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parents: 2203
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39 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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40 done();
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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41 end, rbl_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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42 wait();
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parents:
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43 end);