prosody-modules: mod_register_dnsbl/mod_register

annotate mod_register_dnsbl/mod_register_dnsbl.lua @ 5668:ecfd7aece33b

mod_measure_modules: Report module statuses via OpenMetrics Someone in the chat asked about a health check endpoint, which reminded me of mod_http_status, which provides access to module statuses with full details. After that, this idea came about, which seems natural. As noted in the README, it could be used to monitor that critical modules are in fact loaded correctly. As more modules use the status API, the more useful this module and mod_http_status becomes.

author	Kim Alvefur <zash@zash.se>
date	Fri, 06 Oct 2023 18:34:39 +0200
parents	82482e7e92cb
children

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: diff changeset	1 local adns = require "net.adns";
2890 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 diff changeset	2 local async = require "util.async";
2891 84670bac7348 mod_register_dnsbl: Use util.net for IP address parsing Kim Alvefur <zash@zash.se> parents: 2890 diff changeset	3 local inet_pton = require "util.net".pton;
2892 bf9fc41bf7ad mod_register_dnsbl: Add support for IPv6 DNSBL Kim Alvefur <zash@zash.se> parents: 2891 diff changeset	4 local to_hex = require "util.hex".to;
2890 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 diff changeset	5
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	6 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 Kim Alvefur <zash@zash.se> parents: diff changeset	7
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	8 local function reverse(ip, suffix)
2891 84670bac7348 mod_register_dnsbl: Use util.net for IP address parsing Kim Alvefur <zash@zash.se> parents: 2890 diff changeset	9 local n, err = inet_pton(ip);
84670bac7348 mod_register_dnsbl: Use util.net for IP address parsing Kim Alvefur <zash@zash.se> parents: 2890 diff changeset	10 if not n then return n, err end
84670bac7348 mod_register_dnsbl: Use util.net for IP address parsing Kim Alvefur <zash@zash.se> parents: 2890 diff changeset	11 if #n == 4 then
84670bac7348 mod_register_dnsbl: Use util.net for IP address parsing Kim Alvefur <zash@zash.se> parents: 2890 diff changeset	12 local a,b,c,d = n:byte(1,4);
84670bac7348 mod_register_dnsbl: Use util.net for IP address parsing Kim Alvefur <zash@zash.se> parents: 2890 diff changeset	13 return ("%d.%d.%d.%d.%s"):format(d,c,b,a, suffix);
2892 bf9fc41bf7ad mod_register_dnsbl: Add support for IPv6 DNSBL Kim Alvefur <zash@zash.se> parents: 2891 diff changeset	14 elseif #n == 16 then
bf9fc41bf7ad mod_register_dnsbl: Add support for IPv6 DNSBL Kim Alvefur <zash@zash.se> parents: 2891 diff changeset	15 return to_hex(n):reverse():gsub("%x", "%1.") .. suffix;
2891 84670bac7348 mod_register_dnsbl: Use util.net for IP address parsing Kim Alvefur <zash@zash.se> parents: 2890 diff changeset	16 end
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	17 end
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	18
2890 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 diff changeset	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 Kim Alvefur <zash@zash.se> parents: 2203 diff changeset	20 local session, ip = event.session, event.ip;
4118 82482e7e92cb mod_register_dnsbl: Handle missing session in user-registering event (thanks meaz) Matthew Wild <mwild1@gmail.com> parents: 2892 diff changeset	21 local log = (session and session.log) or module._log;
2890 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 diff changeset	22 if not ip then
4118 82482e7e92cb mod_register_dnsbl: Handle missing session in user-registering event (thanks meaz) Matthew Wild <mwild1@gmail.com> parents: 2892 diff changeset	23 log("debug", "Unable to check DNSBL when IP is unknown");
2890 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 diff changeset	24 return;
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 diff changeset	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 diff changeset	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 diff changeset	27 if not rbl_ip then
4118 82482e7e92cb mod_register_dnsbl: Handle missing session in user-registering event (thanks meaz) Matthew Wild <mwild1@gmail.com> parents: 2892 diff changeset	28 log("debug", "Unable to check DNSBL for ip %s: %s", ip, err);
2890 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 diff changeset	29 return;
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 diff changeset	30 end
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	31
2890 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 diff changeset	32 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 Kim Alvefur <zash@zash.se> parents: 2203 diff changeset	33 adns.lookup(function (reply)
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 diff changeset	34 if reply and reply[1] and reply[1].a then
4118 82482e7e92cb mod_register_dnsbl: Handle missing session in user-registering event (thanks meaz) Matthew Wild <mwild1@gmail.com> parents: 2892 diff changeset	35 log("debug", "DNSBL response: %s IN A %s", rbl_ip, reply[1].a);
82482e7e92cb mod_register_dnsbl: Handle missing session in user-registering event (thanks meaz) Matthew Wild <mwild1@gmail.com> parents: 2892 diff changeset	36 log("info", "Blocking %s from registering %s (dnsbl hit)", ip, event.username);
2890 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 diff changeset	37 event.allowed = false;
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 diff changeset	38 event.reason = "Blocked by DNSBL";
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 diff changeset	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 diff changeset	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 diff changeset	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 Kim Alvefur <zash@zash.se> parents: 2203 diff changeset	42 wait();
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	43 end);

Mercurial > prosody-modules

annotate mod_register_dnsbl/mod_register_dnsbl.lua @ 5668:ecfd7aece33b