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annotate mod_firewall/definitions.lib.lua @ 5139:449e4ca4de32

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mod_unified_push: Remove dependency on trunk util.jwt (0.12 compat) This should allow the module to work on 0.12, while preserving expiry checking (which was not built in to 0.12's util.jwt).
author Matthew Wild <mwild1@gmail.com>
date Tue, 10 Jan 2023 16:34:21 +0000
parents b88f05c878ac
children 0f943619e01a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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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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122 local next_poll = poll_interval;
2520
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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
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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
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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
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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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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();
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
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
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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 ()
84e103fd8039 mod_firewall: Add dummy add/remove methods for HTTP lists
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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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parents: 2370
diff changeset
150 if self.hash_function then
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parents: 2370
diff changeset
151 item = self.hash_function(item);
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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
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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)
Matthew Wild <mwild1@gmail.com>
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
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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)
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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)
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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)
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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
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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
c6fd8975704b mod_firewall: Initial support for lists, in-memory and HTTP
Matthew Wild <mwild1@gmail.com>
parents: 2370
diff changeset
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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300
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301 %LIST spammers: memory (source: /etc/spammers.txt)
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302
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303
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304 %LIST spammers: http://example.com/blacklist.txt
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305 ]]
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306
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307 function definition_handlers.LIST(list_name, list_definition)
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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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315 end
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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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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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diff changeset
325 end
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diff changeset
326
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diff changeset
327 function definition_handlers.SEARCH(name, pattern)
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diff changeset
328 return pattern;
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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;