prosody-modules
c0d243b27e64
mod_firewall/definitions.lib.lua

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mod_firewall/definitions.lib.lua @ 5039:c0d243b27e64

mod_sasl2, mod_sasl_bind2, mod_sasl2_sm: Bump XEP-0388 namespace This is the namespace for the proposed update to XEP-0388. I.e. not even experimental yet... but this is all a work in progress anyway.
author Matthew Wild <mwild1@gmail.com>
date Tue, 13 Sep 2022 20:32:20 +0100
parent 4512:b88f05c878ac
child 5232:0f943619e01a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2079
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1
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2 -- Name arguments are unused here
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3 -- luacheck: ignore 212
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5 local definition_handlers = {};
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6
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7 local http = require "net.http";
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8 local timer = require "util.timer";
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9 local set = require"util.set";
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10 local new_throttle = require "util.throttle".create;
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11 local hashes = require "util.hashes";
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12 local jid = require "util.jid";
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13 local lfs = require "lfs";
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14
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15 local multirate_cache_size = module:get_option_number("firewall_multirate_cache_limit", 1000);
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17 function definition_handlers.ZONE(zone_name, zone_members)
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18 local zone_member_list = {};
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19 for member in zone_members:gmatch("[^, ]+") do
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20 zone_member_list[#zone_member_list+1] = member;
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21 end
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22 return set.new(zone_member_list)._items;
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23 end
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24
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25 -- Helper function used by RATE handler
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26 local function evict_only_unthrottled(name, throttle)
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27 throttle:update();
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28 -- Check whether the throttle is at max balance (i.e. totally safe to forget about it)
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29 if throttle.balance < throttle.max then
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30 -- Not safe to forget
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31 return false;
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32 end
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33 end
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34
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35 function definition_handlers.RATE(name, line)
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36 local rate = assert(tonumber(line:match("([%d.]+)")), "Unable to parse rate");
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37 local burst = tonumber(line:match("%(%s*burst%s+([%d.]+)%s*%)")) or 1;
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38 local max_throttles = tonumber(line:match("%(%s*entries%s+([%d]+)%s*%)")) or multirate_cache_size;
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39 local deny_when_full = not line:match("%(allow overflow%)");
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40 return {
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41 single = function ()
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42 return new_throttle(rate*burst, burst);
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43 end;
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44
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45 multi = function ()
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46 local cache = require "util.cache".new(max_throttles, deny_when_full and evict_only_unthrottled or nil);
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47 return {
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48 poll_on = function (_, key, amount)
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49 assert(key, "no key");
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50 local throttle = cache:get(key);
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51 if not throttle then
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52 throttle = new_throttle(rate*burst, burst);
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53 if not cache:set(key, throttle) then
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54 module:log("warn", "Multirate '%s' has hit its maximum number of active throttles (%d), denying new events", name, max_throttles);
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55 return false;
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56 end
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57 end
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58 return throttle:poll(amount);
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59 end;
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60 }
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61 end;
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62 };
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63 end
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64
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65 local list_backends = {
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66 -- %LIST name: memory (limit: number)
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67 memory = {
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68 init = function (self, type, opts)
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69 if opts.limit then
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70 local have_cache_lib, cache_lib = pcall(require, "util.cache");
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71 if not have_cache_lib then
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72 error("In-memory lists with a size limit require Prosody 0.10");
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73 end
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74 self.cache = cache_lib.new((assert(tonumber(opts.limit), "Invalid list limit")));
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75 if not self.cache.table then
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76 error("In-memory lists with a size limit require a newer version of Prosody 0.10");
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77 end
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78 self.items = self.cache:table();
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79 else
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80 self.items = {};
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81 end
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82 end;
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83 add = function (self, item)
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84 self.items[item] = true;
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85 end;
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86 remove = function (self, item)
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87 self.items[item] = nil;
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88 end;
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89 contains = function (self, item)
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90 return self.items[item] == true;
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91 end;
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92 };
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93
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94 -- %LIST name: http://example.com/ (ttl: number, pattern: pat, hash: sha1)
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95 http = {
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96 init = function (self, url, opts)
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97 local poll_interval = assert(tonumber(opts.ttl or "3600"), "invalid ttl for <"..url.."> (expected number of seconds)");
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98 local pattern = opts.pattern or "([^\r\n]+)\r?\n";
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99 assert(pcall(string.match, "", pattern), "invalid pattern for <"..url..">");
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100 if opts.hash then
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101 assert(opts.hash:match("^%w+$") and type(hashes[opts.hash]) == "function", "invalid hash function: "..opts.hash);
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102 self.hash_function = hashes[opts.hash];
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103 end
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104 local etag;
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105 local failure_count = 0;
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106 local retry_intervals = { 60, 120, 300 };
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107 -- By default only check the certificate if net.http supports SNI
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108 local sni_supported = http.feature and http.features.sni;
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109 local insecure = false;
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110 if opts.checkcert == "never" then
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111 insecure = true;
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112 elseif (opts.checkcert == nil or opts.checkcert == "when-sni") and not sni_supported then
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113 insecure = false;
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114 end
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115 local function update_list()
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116 http.request(url, {
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117 insecure = insecure;
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118 headers = {
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119 ["If-None-Match"] = etag;
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120 };
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121 }, function (body, code, response)
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72cbec103709 mod_firewall: Improve HTTP polling logic
Matthew Wild <mwild1@gmail.com>
parents: 2520
diff changeset
122 local next_poll = poll_interval;
2520
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
123 if code == 200 and body then
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
124 etag = response.headers.etag;
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
125 local items = {};
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
126 for entry in body:gmatch(pattern) do
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
127 items[entry] = true;
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
128 end
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
129 self.items = items;
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
130 module:log("debug", "Fetched updated list from <%s>", url);
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
131 elseif code == 304 then
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
132 module:log("debug", "List at <%s> is unchanged", url);
2522
72cbec103709 mod_firewall: Improve HTTP polling logic
Matthew Wild <mwild1@gmail.com>
parents: 2520
diff changeset
133 elseif code == 0 or (code >= 400 and code <=599) then
2520
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parents: 2370
diff changeset
134 module:log("warn", "Failed to fetch list from <%s>: %d %s", url, code, tostring(body));
2522
72cbec103709 mod_firewall: Improve HTTP polling logic
Matthew Wild <mwild1@gmail.com>
parents: 2520
diff changeset
135 failure_count = failure_count + 1;
72cbec103709 mod_firewall: Improve HTTP polling logic
Matthew Wild <mwild1@gmail.com>
parents: 2520
diff changeset
136 next_poll = retry_intervals[failure_count] or retry_intervals[#retry_intervals];
2520
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
137 end
2522
72cbec103709 mod_firewall: Improve HTTP polling logic
Matthew Wild <mwild1@gmail.com>
parents: 2520
diff changeset
138 if next_poll > 0 then
72cbec103709 mod_firewall: Improve HTTP polling logic
Matthew Wild <mwild1@gmail.com>
parents: 2520
diff changeset
139 timer.add_task(next_poll+math.random(0, 60), update_list);
2520
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Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
140 end
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
141 end);
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
142 end
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
143 update_list();
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Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
144 end;
2530
84e103fd8039 mod_firewall: Add dummy add/remove methods for HTTP lists
Matthew Wild <mwild1@gmail.com>
parents: 2528
diff changeset
145 add = function ()
84e103fd8039 mod_firewall: Add dummy add/remove methods for HTTP lists
Matthew Wild <mwild1@gmail.com>
parents: 2528
diff changeset
146 end;
84e103fd8039 mod_firewall: Add dummy add/remove methods for HTTP lists
Matthew Wild <mwild1@gmail.com>
parents: 2528
diff changeset
147 remove = function ()
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parents: 2528
diff changeset
148 end;
2520
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diff changeset
149 contains = function (self, item)
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Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
150 if self.hash_function then
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parents: 2370
diff changeset
151 item = self.hash_function(item);
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
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parents: 2370
diff changeset
152 end
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
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parents: 2370
diff changeset
153 return self.items and self.items[item] == true;
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diff changeset
154 end;
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
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parents: 2370
diff changeset
155 };
2898
9fd61234b6f0 mod_firewall/definitions: Comments on LIST backends
Kim Alvefur <zash@zash.se>
parents: 2859
diff changeset
156
9fd61234b6f0 mod_firewall/definitions: Comments on LIST backends
Kim Alvefur <zash@zash.se>
parents: 2859
diff changeset
157 -- %LIST: file:/path/to/file
2532
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
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parents: 2530
diff changeset
158 file = {
2535
b85d88737a32 mod_firewall: Fix file backend init code
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parents: 2532
diff changeset
159 init = function (self, file_spec, opts)
4017
015452258952 mod_firewall: Ensure file lists are always initialized empty
Matthew Wild <mwild1@gmail.com>
parents: 4016
diff changeset
160 local n, items = 0, {};
015452258952 mod_firewall: Ensure file lists are always initialized empty
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parents: 4016
diff changeset
161 self.items = items;
2535
b85d88737a32 mod_firewall: Fix file backend init code
Matthew Wild <mwild1@gmail.com>
parents: 2532
diff changeset
162 local filename = file_spec:gsub("^file:", "");
4016
b872f111b7af mod_firewall: Add option to ignore missing list files
Matthew Wild <mwild1@gmail.com>
parents: 3240
diff changeset
163 if opts.missing == "ignore" and not lfs.attributes(filename, "mode") then
b872f111b7af mod_firewall: Add option to ignore missing list files
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parents: 3240
diff changeset
164 module:log("debug", "Ignoring missing list file: %s", filename);
b872f111b7af mod_firewall: Add option to ignore missing list files
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parents: 3240
diff changeset
165 return;
b872f111b7af mod_firewall: Add option to ignore missing list files
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parents: 3240
diff changeset
166 end
2532
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
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parents: 2530
diff changeset
167 local file, err = io.open(filename);
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
Matthew Wild <mwild1@gmail.com>
parents: 2530
diff changeset
168 if not file then
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
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parents: 2530
diff changeset
169 module:log("warn", "Failed to open list from %s: %s", filename, err);
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
Matthew Wild <mwild1@gmail.com>
parents: 2530
diff changeset
170 return;
3240
c30f2cfe9f15 mod_firewall: Assume empty list if file could not be loaded
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parents: 2898
diff changeset
171 else
c30f2cfe9f15 mod_firewall: Assume empty list if file could not be loaded
Matthew Wild <mwild1@gmail.com>
parents: 2898
diff changeset
172 for line in file:lines() do
c30f2cfe9f15 mod_firewall: Assume empty list if file could not be loaded
Matthew Wild <mwild1@gmail.com>
parents: 2898
diff changeset
173 if not items[line] then
c30f2cfe9f15 mod_firewall: Assume empty list if file could not be loaded
Matthew Wild <mwild1@gmail.com>
parents: 2898
diff changeset
174 n = n + 1;
c30f2cfe9f15 mod_firewall: Assume empty list if file could not be loaded
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parents: 2898
diff changeset
175 items[line] = true;
c30f2cfe9f15 mod_firewall: Assume empty list if file could not be loaded
Matthew Wild <mwild1@gmail.com>
parents: 2898
diff changeset
176 end
2536
22a271641c29 mod_firewall: Improve debug logging for LIST file backend
Matthew Wild <mwild1@gmail.com>
parents: 2535
diff changeset
177 end
2532
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
Matthew Wild <mwild1@gmail.com>
parents: 2530
diff changeset
178 end
2536
22a271641c29 mod_firewall: Improve debug logging for LIST file backend
Matthew Wild <mwild1@gmail.com>
parents: 2535
diff changeset
179 module:log("debug", "Loaded %d items from %s", n, filename);
2532
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
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parents: 2530
diff changeset
180 end;
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
Matthew Wild <mwild1@gmail.com>
parents: 2530
diff changeset
181 add = function (self, item)
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
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parents: 2530
diff changeset
182 self.items[item] = true;
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
Matthew Wild <mwild1@gmail.com>
parents: 2530
diff changeset
183 end;
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
Matthew Wild <mwild1@gmail.com>
parents: 2530
diff changeset
184 remove = function (self, item)
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
Matthew Wild <mwild1@gmail.com>
parents: 2530
diff changeset
185 self.items[item] = nil;
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
Matthew Wild <mwild1@gmail.com>
parents: 2530
diff changeset
186 end;
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
Matthew Wild <mwild1@gmail.com>
parents: 2530
diff changeset
187 contains = function (self, item)
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
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parents: 2530
diff changeset
188 return self.items and self.items[item] == true;
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
Matthew Wild <mwild1@gmail.com>
parents: 2530
diff changeset
189 end;
2ddb74805f91 mod_firewall: Add 'file' backend for lists (read-only atm)
Matthew Wild <mwild1@gmail.com>
parents: 2530
diff changeset
190 };
4512
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
191
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
192 -- %LIST: pubsub:pubsub.example.com/node
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
193 -- TODO or the actual URI scheme? Bit overkill maybe?
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
194 -- TODO Publish items back to the service?
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
195 -- Step 1: Receiving pubsub events and storing them in the list
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
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parents: 4127
diff changeset
196 -- We'll start by using only the item id.
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
197 -- TODO Invent some custom schema for this? Needed for just a set of strings?
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
198 pubsubitemid = {
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
199 init = function(self, pubsub_spec, opts)
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
200 local service_addr, node = pubsub_spec:match("^([^/]*)/(.*)");
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
201 module:depends("pubsub_subscription");
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
202 module:add_item("pubsub-subscription", {
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
203 service = service_addr;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
204 node = node;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
205 on_subscribed = function ()
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
206 self.items = {};
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
207 end;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
208 on_item = function (event)
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
209 self:add(event.item.attr.id);
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
210 end;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
211 on_retract = function (event)
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
212 self:remove(event.item.attr.id);
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
213 end;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
214 on_purge = function ()
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
215 self.items = {};
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
216 end;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
217 on_unsubscribed = function ()
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
218 self.items = nil;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
219 end;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
220 on_delete= function ()
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
221 self.items = nil;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
222 end;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
223 });
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
224 -- TODO Initial fetch? Or should mod_pubsub_subscription do this?
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
225 end;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
226 add = function (self, item)
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
227 if self.items then
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
228 self.items[item] = true;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
229 end
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
230 end;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
231 remove = function (self, item)
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
232 if self.items then
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
233 self.items[item] = nil;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
234 end
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
235 end;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
236 contains = function (self, item)
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
237 return self.items and self.items[item] == true;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
238 end;
b88f05c878ac mod_firewall: Add basic LIST backend for receiving items from PubSub
Kim Alvefur <zash@zash.se>
parents: 4127
diff changeset
239 };
2520
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
240 };
2523
a3a18d09ae8a mod_firewall: Also handle HTTPS for lists
Matthew Wild <mwild1@gmail.com>
parents: 2522
diff changeset
241 list_backends.https = list_backends.http;
2520
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
242
2586
d28e434cb5fd mod_firewall: Support filters for normalizing items before checking for them in lists
Matthew Wild <mwild1@gmail.com>
parents: 2536
diff changeset
243 local normalize_functions = {
d28e434cb5fd mod_firewall: Support filters for normalizing items before checking for them in lists
Matthew Wild <mwild1@gmail.com>
parents: 2536
diff changeset
244 upper = string.upper, lower = string.lower;
d28e434cb5fd mod_firewall: Support filters for normalizing items before checking for them in lists
Matthew Wild <mwild1@gmail.com>
parents: 2536
diff changeset
245 md5 = hashes.md5, sha1 = hashes.sha1, sha256 = hashes.sha256;
d28e434cb5fd mod_firewall: Support filters for normalizing items before checking for them in lists
Matthew Wild <mwild1@gmail.com>
parents: 2536
diff changeset
246 prep = jid.prep, bare = jid.bare;
d28e434cb5fd mod_firewall: Support filters for normalizing items before checking for them in lists
Matthew Wild <mwild1@gmail.com>
parents: 2536
diff changeset
247 };
d28e434cb5fd mod_firewall: Support filters for normalizing items before checking for them in lists
Matthew Wild <mwild1@gmail.com>
parents: 2536
diff changeset
248
d28e434cb5fd mod_firewall: Support filters for normalizing items before checking for them in lists
Matthew Wild <mwild1@gmail.com>
parents: 2536
diff changeset
249 local function wrap_list_method(list_method, filter)
d28e434cb5fd mod_firewall: Support filters for normalizing items before checking for them in lists
Matthew Wild <mwild1@gmail.com>
parents: 2536
diff changeset
250 return function (self, item)
d28e434cb5fd mod_firewall: Support filters for normalizing items before checking for them in lists
Matthew Wild <mwild1@gmail.com>
parents: 2536
diff changeset
251 return list_method(self, filter(item));
d28e434cb5fd mod_firewall: Support filters for normalizing items before checking for them in lists
Matthew Wild <mwild1@gmail.com>
parents: 2536
diff changeset
252 end
d28e434cb5fd mod_firewall: Support filters for normalizing items before checking for them in lists
Matthew Wild <mwild1@gmail.com>
parents: 2536
diff changeset
253 end
d28e434cb5fd mod_firewall: Support filters for normalizing items before checking for them in lists
Matthew Wild <mwild1@gmail.com>
parents: 2536
diff changeset
254
2520
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
255 local function create_list(list_backend, list_def, opts)
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
256 if not list_backends[list_backend] then
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257 error("Unknown list type '"..list_backend.."'", 0);
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258 end
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259 local list = setmetatable({}, { __index = list_backends[list_backend] });
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260 if list.init then
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261 list:init(list_def, opts);
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262 end
2586
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263 if opts.filter then
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264 local filters = {};
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265 for func_name in opts.filter:gmatch("[%w_]+") do
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266 if func_name == "log" then
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267 table.insert(filters, function (s)
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268 --print("&&&&&", s);
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269 module:log("debug", "Checking list <%s> for: %s", list_def, s);
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270 return s;
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271 end);
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272 else
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273 assert(normalize_functions[func_name], "Unknown list filter: "..func_name);
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274 table.insert(filters, normalize_functions[func_name]);
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275 end
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276 end
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277
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278 local filter;
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279 local n = #filters;
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280 if n == 1 then
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281 filter = filters[1];
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282 else
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283 function filter(s)
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284 for i = 1, n do
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285 s = filters[i](s or "");
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286 end
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287 return s;
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288 end
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289 end
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290
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291 list.add = wrap_list_method(list.add, filter);
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292 list.remove = wrap_list_method(list.remove, filter);
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293 list.contains = wrap_list_method(list.contains, filter);
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294 end
2520
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295 return list;
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296 end
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297
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298 --[[
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299 %LIST spammers: memory (source: /etc/spammers.txt)
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diff changeset
300
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301 %LIST spammers: memory (source: /etc/spammers.txt)
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diff changeset
302
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303
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304 %LIST spammers: http://example.com/blacklist.txt
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diff changeset
305 ]]
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306
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307 function definition_handlers.LIST(list_name, list_definition)
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diff changeset
308 local list_backend = list_definition:match("^%w+");
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309 local opts = {};
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310 local opt_string = list_definition:match("^%S+%s+%((.+)%)");
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diff changeset
311 if opt_string then
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diff changeset
312 for opt_k, opt_v in opt_string:gmatch("(%w+): ?([^,]+)") do
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diff changeset
313 opts[opt_k] = opt_v;
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314 end
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diff changeset
315 end
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diff changeset
316 return create_list(list_backend, list_definition:match("^%S+"), opts);
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317 end
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diff changeset
318
2528
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diff changeset
319 function definition_handlers.PATTERN(name, pattern)
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diff changeset
320 local ok, err = pcall(string.match, "", pattern);
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diff changeset
321 if not ok then
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diff changeset
322 error("Invalid pattern '"..name.."': "..err);
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parents: 2523
diff changeset
323 end
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diff changeset
324 return pattern;
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parents: 2523
diff changeset
325 end
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parents: 2523
diff changeset
326
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diff changeset
327 function definition_handlers.SEARCH(name, pattern)
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parents: 2523
diff changeset
328 return pattern;
44a71584521d mod_firewall: Add SEARCH, PATTERN definitions and SCAN condition to check tokenized stanza:find() against a list
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parents: 2523
diff changeset
329 end
44a71584521d mod_firewall: Add SEARCH, PATTERN definitions and SCAN condition to check tokenized stanza:find() against a list
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parents: 2523
diff changeset
330
999
197af8440ffb mod_firewall: Make defining objects generic (currently zones and rate limits), so more can easily be added. Also a syntax change... definition lines must begin with %
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
331 return definition_handlers;