prosody-modules
c0c2f8665c3e
mod_firewall/mod_firewall.lua

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mod_firewall/mod_firewall.lua @ 2385:c0c2f8665c3e

mod_firewall: Fix for raw code expressions that contain escape-worthy characters
author Matthew Wild <mwild1@gmail.com>
date Sat, 19 Nov 2016 15:47:41 +0000
parent 2374:d630fa0d4dba
child 2402:2040330586e4
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1
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2 local resolve_relative_path = require "core.configmanager".resolve_relative_path;
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3 local logger = require "util.logger".init;
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4 local it = require "util.iterators";
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5
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6 local definitions = module:shared("definitions");
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7 local active_definitions = {
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8 ZONE = {
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9 -- Default zone that includes all local hosts
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10 ["$local"] = setmetatable({}, { __index = prosody.hosts });
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11 }
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12 };
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14 local default_chains = {
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15 preroute = {
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16 type = "event";
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17 priority = 0.1;
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18 "pre-message/bare", "pre-message/full", "pre-message/host";
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19 "pre-presence/bare", "pre-presence/full", "pre-presence/host";
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20 "pre-iq/bare", "pre-iq/full", "pre-iq/host";
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21 };
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22 deliver = {
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23 type = "event";
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24 priority = 0.1;
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25 "message/bare", "message/full", "message/host";
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26 "presence/bare", "presence/full", "presence/host";
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27 "iq/bare", "iq/full", "iq/host";
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28 };
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29 deliver_remote = {
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30 type = "event"; "route/remote";
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31 priority = 0.1;
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32 };
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33 };
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34
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35 local extra_chains = module:get_option("firewall_extra_chains", {});
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36
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37 local chains = {};
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38 for k,v in pairs(default_chains) do
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39 chains[k] = v;
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40 end
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41 for k,v in pairs(extra_chains) do
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42 chains[k] = v;
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43 end
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44
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45 -- Returns the input if it is safe to be used as a variable name, otherwise nil
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46 function idsafe(name)
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47 return name:match("^%a[%w_]*$")
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48 end
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49
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50 -- Run quoted (%q) strings through this to allow them to contain code. e.g.: LOG=Received: $(stanza:top_tag())
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51 function meta(s, extra)
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52 return (s:gsub("$(%b())", function (expr)
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53 expr = expr:gsub("\\(.)", "%1");
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54 return [["..tostring(]]..expr..[[).."]];
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55 end)
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56 :gsub("$(%b<>)", function (expr)
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57 expr = expr:sub(2,-2);
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58 local default = expr:match("||([^|]+)$");
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59 if default then
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60 expr = expr:sub(1, -(#default+2));
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61 else
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62 default = "<undefined>";
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63 end
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64 if expr:match("^@") then
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65 return "\"..(stanza.attr["..("%q"):format(expr:sub(2)).."] or "..("%q"):format(default)..")..\"";
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66 end
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67 return "\"..(stanza:find("..("%q"):format(expr:sub(2, -2))..") or "..("%q"):format(default)..")..\"";
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68 end)
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69 :gsub("$$(%a+)", extra or {})
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70 :gsub([[^""%.%.]], "")
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71 :gsub([[%.%.""$]], ""));
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72 end
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73
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74
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75 -- Dependency locations:
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76 -- <type lib>
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77 -- <type global>
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78 -- function handler()
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79 -- <local deps>
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80 -- if <conditions> then
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81 -- <actions>
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82 -- end
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83 -- end
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84
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85 local available_deps = {
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86 st = { global_code = [[local st = require "util.stanza";]]};
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87 jid_split = {
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88 global_code = [[local jid_split = require "util.jid".split;]];
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89 };
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90 jid_bare = {
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91 global_code = [[local jid_bare = require "util.jid".bare;]];
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92 };
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93 to = { local_code = [[local to = stanza.attr.to;]] };
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94 from = { local_code = [[local from = stanza.attr.from;]] };
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95 type = { local_code = [[local type = stanza.attr.type;]] };
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96 name = { local_code = [[local name = stanza.name]] };
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97 split_to = { -- The stanza's split to address
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98 depends = { "jid_split", "to" };
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99 local_code = [[local to_node, to_host, to_resource = jid_split(to);]];
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100 };
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101 split_from = { -- The stanza's split from address
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102 depends = { "jid_split", "from" };
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103 local_code = [[local from_node, from_host, from_resource = jid_split(from);]];
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104 };
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105 bare_to = { depends = { "jid_bare", "to" }, local_code = "local bare_to = jid_bare(to)"};
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106 bare_from = { depends = { "jid_bare", "from" }, local_code = "local bare_from = jid_bare(from)"};
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107 group_contains = {
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108 global_code = [[local group_contains = module:depends("groups").group_contains]];
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109 };
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110 is_admin = { global_code = [[local is_admin = require "core.usermanager".is_admin]]};
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111 core_post_stanza = { global_code = [[local core_post_stanza = prosody.core_post_stanza]] };
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112 zone = { global_code = function (zone)
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113 assert(idsafe(zone), "Invalid zone name: "..zone);
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114 return ("local zone_%s = zones[%q] or {};"):format(zone, zone);
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115 end };
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116 date_time = { global_code = [[local os_date = os.date]]; local_code = [[local current_date_time = os_date("*t");]] };
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117 time = { local_code = function (what)
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118 local defs = {};
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119 for field in what:gmatch("%a+") do
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120 table.insert(defs, ("local current_%s = current_date_time.%s;"):format(field, field));
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Matthew Wild <mwild1@gmail.com>
parents: 965
diff changeset
121 end
a65df6e97d94 mod_firewall: Add time and date deps
Matthew Wild <mwild1@gmail.com>
parents: 965
diff changeset
122 return table.concat(defs, " ");
a65df6e97d94 mod_firewall: Add time and date deps
Matthew Wild <mwild1@gmail.com>
parents: 965
diff changeset
123 end, depends = { "date_time" }; };
2100
cbd0095e9302 mod_firewall: Add 'timestamp' dep to get current_timestamp
Matthew Wild <mwild1@gmail.com>
parents: 2099
diff changeset
124 timestamp = { global_code = [[local get_time = require "socket".gettime]]; local_code = [[local current_timestamp = get_time()]]; };
2128
21bc4d7cddae mod_firewall: Add support for throttling based on user-defined properties (experimental)
Matthew Wild <mwild1@gmail.com>
parents: 2126
diff changeset
125 globalthrottle = {
971
53e158e44a44 mod_firewall: Add rate limiting capabilities, and keep zones and throttle objects in shared tables
Matthew Wild <mwild1@gmail.com>
parents: 967
diff changeset
126 global_code = function (throttle)
53e158e44a44 mod_firewall: Add rate limiting capabilities, and keep zones and throttle objects in shared tables
Matthew Wild <mwild1@gmail.com>
parents: 967
diff changeset
127 assert(idsafe(throttle), "Invalid rate limit name: "..throttle);
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: 998
diff changeset
128 assert(active_definitions.RATE[throttle], "Unknown rate limit: "..throttle);
2128
21bc4d7cddae mod_firewall: Add support for throttling based on user-defined properties (experimental)
Matthew Wild <mwild1@gmail.com>
parents: 2126
diff changeset
129 return ("local global_throttle_%s = rates.%s:single();"):format(throttle, throttle);
21bc4d7cddae mod_firewall: Add support for throttling based on user-defined properties (experimental)
Matthew Wild <mwild1@gmail.com>
parents: 2126
diff changeset
130 end;
21bc4d7cddae mod_firewall: Add support for throttling based on user-defined properties (experimental)
Matthew Wild <mwild1@gmail.com>
parents: 2126
diff changeset
131 };
21bc4d7cddae mod_firewall: Add support for throttling based on user-defined properties (experimental)
Matthew Wild <mwild1@gmail.com>
parents: 2126
diff changeset
132 multithrottle = {
21bc4d7cddae mod_firewall: Add support for throttling based on user-defined properties (experimental)
Matthew Wild <mwild1@gmail.com>
parents: 2126
diff changeset
133 global_code = function (throttle)
2130
9239893a2400 mod_firewall: Don't use util.cache unless it's needed, and add explanatory error if it is not available
Matthew Wild <mwild1@gmail.com>
parents: 2128
diff changeset
134 assert(pcall(require, "util.cache"), "Using LIMIT with 'on' requires Prosody 0.10 or higher");
2128
21bc4d7cddae mod_firewall: Add support for throttling based on user-defined properties (experimental)
Matthew Wild <mwild1@gmail.com>
parents: 2126
diff changeset
135 assert(idsafe(throttle), "Invalid rate limit name: "..throttle);
21bc4d7cddae mod_firewall: Add support for throttling based on user-defined properties (experimental)
Matthew Wild <mwild1@gmail.com>
parents: 2126
diff changeset
136 assert(active_definitions.RATE[throttle], "Unknown rate limit: "..throttle);
21bc4d7cddae mod_firewall: Add support for throttling based on user-defined properties (experimental)
Matthew Wild <mwild1@gmail.com>
parents: 2126
diff changeset
137 return ("local multi_throttle_%s = rates.%s:multi();"):format(throttle, throttle);
971
53e158e44a44 mod_firewall: Add rate limiting capabilities, and keep zones and throttle objects in shared tables
Matthew Wild <mwild1@gmail.com>
parents: 967
diff changeset
138 end;
53e158e44a44 mod_firewall: Add rate limiting capabilities, and keep zones and throttle objects in shared tables
Matthew Wild <mwild1@gmail.com>
parents: 967
diff changeset
139 };
2342
6848297cf40a mod_firewall: Add conditions for testing whether a sender of a stanza is in the recipient's roster (or in a certain roster group)
Matthew Wild <mwild1@gmail.com>
parents: 2130
diff changeset
140 roster_entry = {
6848297cf40a mod_firewall: Add conditions for testing whether a sender of a stanza is in the recipient's roster (or in a certain roster group)
Matthew Wild <mwild1@gmail.com>
parents: 2130
diff changeset
141 global_code = [[local rostermanager = require "core.rostermanager";]];
6848297cf40a mod_firewall: Add conditions for testing whether a sender of a stanza is in the recipient's roster (or in a certain roster group)
Matthew Wild <mwild1@gmail.com>
parents: 2130
diff changeset
142 local_code = [[local roster_entry = (rostermanager.load_roster(to_node, to_host) or {})[bare_from];]];
6848297cf40a mod_firewall: Add conditions for testing whether a sender of a stanza is in the recipient's roster (or in a certain roster group)
Matthew Wild <mwild1@gmail.com>
parents: 2130
diff changeset
143 depends = { "split_to", "bare_from" };
6848297cf40a mod_firewall: Add conditions for testing whether a sender of a stanza is in the recipient's roster (or in a certain roster group)
Matthew Wild <mwild1@gmail.com>
parents: 2130
diff changeset
144 }
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
145 };
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
146
2077
368b091e723b mod_firewall: Rename argument to avoid name clash [luacheck]
Kim Alvefur <zash@zash.se>
parents: 2076
diff changeset
147 local function include_dep(dependency, code)
368b091e723b mod_firewall: Rename argument to avoid name clash [luacheck]
Kim Alvefur <zash@zash.se>
parents: 2076
diff changeset
148 local dep, dep_param = dependency:match("^([^:]+):?(.*)$");
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
149 local dep_info = available_deps[dep];
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
150 if not dep_info then
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
151 module:log("error", "Dependency not found: %s", dep);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
152 return;
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
153 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
154 if code.included_deps[dep] then
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
155 if code.included_deps[dep] ~= true then
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
156 module:log("error", "Circular dependency on %s", dep);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
157 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
158 return;
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
159 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
160 code.included_deps[dep] = false; -- Pending flag (used to detect circular references)
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
161 for _, dep_dep in ipairs(dep_info.depends or {}) do
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
162 include_dep(dep_dep, code);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
163 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
164 if dep_info.global_code then
965
d4e24fb289c0 mod_firewall: Improve zone handling, make it more efficient, and support dynamic dependencies in the compiler. ENTERING and LEAVING conditions now work at expected (not matching stanzas flowing within a zone).
Matthew Wild <mwild1@gmail.com>
parents: 960
diff changeset
165 if dep_param ~= "" then
d4e24fb289c0 mod_firewall: Improve zone handling, make it more efficient, and support dynamic dependencies in the compiler. ENTERING and LEAVING conditions now work at expected (not matching stanzas flowing within a zone).
Matthew Wild <mwild1@gmail.com>
parents: 960
diff changeset
166 table.insert(code.global_header, dep_info.global_code(dep_param));
d4e24fb289c0 mod_firewall: Improve zone handling, make it more efficient, and support dynamic dependencies in the compiler. ENTERING and LEAVING conditions now work at expected (not matching stanzas flowing within a zone).
Matthew Wild <mwild1@gmail.com>
parents: 960
diff changeset
167 else
d4e24fb289c0 mod_firewall: Improve zone handling, make it more efficient, and support dynamic dependencies in the compiler. ENTERING and LEAVING conditions now work at expected (not matching stanzas flowing within a zone).
Matthew Wild <mwild1@gmail.com>
parents: 960
diff changeset
168 table.insert(code.global_header, dep_info.global_code);
d4e24fb289c0 mod_firewall: Improve zone handling, make it more efficient, and support dynamic dependencies in the compiler. ENTERING and LEAVING conditions now work at expected (not matching stanzas flowing within a zone).
Matthew Wild <mwild1@gmail.com>
parents: 960
diff changeset
169 end
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
170 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
171 if dep_info.local_code then
965
d4e24fb289c0 mod_firewall: Improve zone handling, make it more efficient, and support dynamic dependencies in the compiler. ENTERING and LEAVING conditions now work at expected (not matching stanzas flowing within a zone).
Matthew Wild <mwild1@gmail.com>
parents: 960
diff changeset
172 if dep_param ~= "" then
1303
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
173 table.insert(code, "\n\t\t-- "..dep.."\n\t\t"..dep_info.local_code(dep_param).."\n");
965
d4e24fb289c0 mod_firewall: Improve zone handling, make it more efficient, and support dynamic dependencies in the compiler. ENTERING and LEAVING conditions now work at expected (not matching stanzas flowing within a zone).
Matthew Wild <mwild1@gmail.com>
parents: 960
diff changeset
174 else
1303
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
175 table.insert(code, "\n\t\t-- "..dep.."\n\t\t"..dep_info.local_code.."\n");
965
d4e24fb289c0 mod_firewall: Improve zone handling, make it more efficient, and support dynamic dependencies in the compiler. ENTERING and LEAVING conditions now work at expected (not matching stanzas flowing within a zone).
Matthew Wild <mwild1@gmail.com>
parents: 960
diff changeset
176 end
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
177 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
178 code.included_deps[dep] = true;
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
179 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
180
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: 998
diff changeset
181 local definition_handlers = module:require("definitions");
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
182 local condition_handlers = module:require("conditions");
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
183 local action_handlers = module:require("actions");
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
184
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
185 local function new_rule(ruleset, chain)
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
186 assert(chain, "no chain specified");
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
187 local rule = { conditions = {}, actions = {}, deps = {} };
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
188 table.insert(ruleset[chain], rule);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
189 return rule;
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
190 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
191
2078
11539785cb92 mod_firewall: Split compile function into two parts in order to separate their scopes
Kim Alvefur <zash@zash.se>
parents: 2077
diff changeset
192 local function parse_firewall_rules(filename)
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
193 local line_no = 0;
1343
7dbde05b48a9 all the things: Remove trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
194
956
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
195 local function errmsg(err)
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
196 return "Error compiling "..filename.." on line "..line_no..": "..err;
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
197 end
1343
7dbde05b48a9 all the things: Remove trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
198
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
199 local ruleset = {
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
200 deliver = {};
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
201 };
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
202
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
203 local chain = "deliver"; -- Default chain
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
204 local rule;
1343
7dbde05b48a9 all the things: Remove trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
205
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
206 local file, err = io.open(filename);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
207 if not file then return nil, err; end
1343
7dbde05b48a9 all the things: Remove trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
208
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
209 local state; -- nil -> "rules" -> "actions" -> nil -> ...
1343
7dbde05b48a9 all the things: Remove trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
210
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
211 local line_hold;
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
212 for line in file:lines() do
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
213 line = line:match("^%s*(.-)%s*$");
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
214 if line_hold and line:sub(-1,-1) ~= "\\" then
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
215 line = line_hold..line;
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
216 line_hold = nil;
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
217 elseif line:sub(-1,-1) == "\\" then
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
218 line_hold = (line_hold or "")..line:sub(1,-2);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
219 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
220 line_no = line_no + 1;
1343
7dbde05b48a9 all the things: Remove trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
221
2080
a435db77a5e5 mod_firewall: Silence warning about empty if branch [luacheck]
Kim Alvefur <zash@zash.se>
parents: 2078
diff changeset
222 if line_hold or line:find("^[#;]") then -- luacheck: ignore 542
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
223 -- No action; comment or partial line
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
224 elseif line == "" then
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
225 if state == "rules" then
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
226 return nil, ("Expected an action on line %d for preceding criteria")
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
227 :format(line_no);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
228 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
229 state = nil;
2070
2356114ff505 mod_firewall: Optimize string match operations, string.find is faster than .match since no string is returned
Kim Alvefur <zash@zash.se>
parents: 1343
diff changeset
230 elseif not(state) and line:sub(1, 2) == "::" then
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
231 chain = line:gsub("^::%s*", "");
980
aeb11522a44f mod_firewall: Fix variable name
Kim Alvefur <zash@zash.se>
parents: 971
diff changeset
232 local chain_info = chains[chain];
956
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
233 if not chain_info then
2364
17d236129118 mod_firewall: Allow implicit defitions of chains in scripts if they begin with 'user/'
Matthew Wild <mwild1@gmail.com>
parents: 2342
diff changeset
234 if chain:match("^user/") then
17d236129118 mod_firewall: Allow implicit defitions of chains in scripts if they begin with 'user/'
Matthew Wild <mwild1@gmail.com>
parents: 2342
diff changeset
235 chains[chain] = { type = "event", priority = 1, "firewall/chains/"..chain };
17d236129118 mod_firewall: Allow implicit defitions of chains in scripts if they begin with 'user/'
Matthew Wild <mwild1@gmail.com>
parents: 2342
diff changeset
236 else
17d236129118 mod_firewall: Allow implicit defitions of chains in scripts if they begin with 'user/'
Matthew Wild <mwild1@gmail.com>
parents: 2342
diff changeset
237 return nil, errmsg("Unknown chain: "..chain);
17d236129118 mod_firewall: Allow implicit defitions of chains in scripts if they begin with 'user/'
Matthew Wild <mwild1@gmail.com>
parents: 2342
diff changeset
238 end
956
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
239 elseif chain_info.type ~= "event" then
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
240 return nil, errmsg("Only event chains supported at the moment");
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
241 end
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
242 ruleset[chain] = ruleset[chain] or {};
2070
2356114ff505 mod_firewall: Optimize string match operations, string.find is faster than .match since no string is returned
Kim Alvefur <zash@zash.se>
parents: 1343
diff changeset
243 elseif not(state) and line:sub(1,1) == "%" then -- Definition (zone, limit, etc.)
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: 998
diff changeset
244 local what, name = line:match("^%%%s*(%w+) +([^ :]+)");
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: 998
diff changeset
245 if not definition_handlers[what] then
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: 998
diff changeset
246 return nil, errmsg("Definition of unknown object: "..what);
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: 998
diff changeset
247 elseif not name or not idsafe(name) then
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: 998
diff changeset
248 return nil, errmsg("Invalid "..what.." name");
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
249 end
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: 998
diff changeset
250
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: 998
diff changeset
251 local val = line:match(": ?(.*)$");
2070
2356114ff505 mod_firewall: Optimize string match operations, string.find is faster than .match since no string is returned
Kim Alvefur <zash@zash.se>
parents: 1343
diff changeset
252 if not val and line:find(":<") then -- Read from file
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: 998
diff changeset
253 local fn = line:match(":< ?(.-)%s*$");
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: 998
diff changeset
254 if not fn then
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: 998
diff changeset
255 return nil, errmsg("Unable to parse filename");
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: 998
diff changeset
256 end
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: 998
diff changeset
257 local f, err = io.open(fn);
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: 998
diff changeset
258 if not f then return nil, errmsg(err); end
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: 998
diff changeset
259 val = f:read("*a"):gsub("\r?\n", " "):gsub("%s+5", "");
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: 998
diff changeset
260 end
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: 998
diff changeset
261 if not val then
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: 998
diff changeset
262 return nil, errmsg("No value given for definition");
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: 998
diff changeset
263 end
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: 998
diff changeset
264
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: 998
diff changeset
265 local ok, ret = pcall(definition_handlers[what], name, val);
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: 998
diff changeset
266 if not ok then
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: 998
diff changeset
267 return nil, errmsg(ret);
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: 998
diff changeset
268 end
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: 998
diff changeset
269
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: 998
diff changeset
270 if not active_definitions[what] then
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: 998
diff changeset
271 active_definitions[what] = {};
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: 998
diff changeset
272 end
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: 998
diff changeset
273 active_definitions[what][name] = ret;
2070
2356114ff505 mod_firewall: Optimize string match operations, string.find is faster than .match since no string is returned
Kim Alvefur <zash@zash.se>
parents: 1343
diff changeset
274 elseif line:find("^[^%s:]+[%.=]") then
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
275 -- Action
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
276 if state == nil then
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
277 -- This is a standalone action with no conditions
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
278 rule = new_rule(ruleset, chain);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
279 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
280 state = "actions";
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
281 -- Action handlers?
2101
41a0a9db89ef mod_firewall: Allow actions to have underscores in their names
Matthew Wild <mwild1@gmail.com>
parents: 2100
diff changeset
282 local action = line:match("^[%w_]+");
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
283 if not action_handlers[action] then
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
284 return nil, ("Unknown action on line %d: %s"):format(line_no, action or "<unknown>");
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
285 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
286 table.insert(rule.actions, "-- "..line)
956
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
287 local ok, action_string, action_deps = pcall(action_handlers[action], line:match("=(.+)$"));
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
288 if not ok then
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
289 return nil, errmsg(action_string);
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
290 end
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
291 table.insert(rule.actions, action_string);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
292 for _, dep in ipairs(action_deps or {}) do
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
293 table.insert(rule.deps, dep);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
294 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
295 elseif state == "actions" then -- state is actions but action pattern did not match
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
296 state = nil; -- Awaiting next rule, etc.
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
297 table.insert(ruleset[chain], rule);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
298 rule = nil;
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
299 else
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
300 if not state then
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
301 state = "rules";
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
302 rule = new_rule(ruleset, chain);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
303 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
304 -- Check standard modifiers for the condition (e.g. NOT)
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
305 local negated;
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
306 local condition = line:match("^[^:=%.]*");
2070
2356114ff505 mod_firewall: Optimize string match operations, string.find is faster than .match since no string is returned
Kim Alvefur <zash@zash.se>
parents: 1343
diff changeset
307 if condition:find("%f[%w]NOT%f[^%w]") then
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
308 local s, e = condition:match("%f[%w]()NOT()%f[^%w]");
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
309 condition = (condition:sub(1,s-1)..condition:sub(e+1, -1)):match("^%s*(.-)%s*$");
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
310 negated = true;
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
311 end
998
6fdcebbd2284 mod_firewall: Fix conditions with spaces
Matthew Wild <mwild1@gmail.com>
parents: 996
diff changeset
312 condition = condition:gsub(" ", "_");
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
313 if not condition_handlers[condition] then
998
6fdcebbd2284 mod_firewall: Fix conditions with spaces
Matthew Wild <mwild1@gmail.com>
parents: 996
diff changeset
314 return nil, ("Unknown condition on line %d: %s"):format(line_no, (condition:gsub("_", " ")));
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
315 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
316 -- Get the code for this condition
956
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
317 local ok, condition_code, condition_deps = pcall(condition_handlers[condition], line:match(":%s?(.+)$"));
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
318 if not ok then
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
319 return nil, errmsg(condition_code);
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
320 end
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
321 if negated then condition_code = "not("..condition_code..")"; end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
322 table.insert(rule.conditions, condition_code);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
323 for _, dep in ipairs(condition_deps or {}) do
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
324 table.insert(rule.deps, dep);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
325 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
326 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
327 end
2078
11539785cb92 mod_firewall: Split compile function into two parts in order to separate their scopes
Kim Alvefur <zash@zash.se>
parents: 2077
diff changeset
328 return ruleset;
11539785cb92 mod_firewall: Split compile function into two parts in order to separate their scopes
Kim Alvefur <zash@zash.se>
parents: 2077
diff changeset
329 end
1343
7dbde05b48a9 all the things: Remove trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
330
2078
11539785cb92 mod_firewall: Split compile function into two parts in order to separate their scopes
Kim Alvefur <zash@zash.se>
parents: 2077
diff changeset
331 local function process_firewall_rules(ruleset)
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
332 -- Compile ruleset and return complete code
1343
7dbde05b48a9 all the things: Remove trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
333
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
334 local chain_handlers = {};
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
335
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
336 -- Loop through the chains in the parsed ruleset (e.g. incoming, outgoing)
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
337 for chain_name, rules in pairs(ruleset) do
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
338 local code = { included_deps = {}, global_header = {} };
1304
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
339 local condition_uses = {};
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
340 -- This inner loop assumes chain is an event-based, not a filter-based
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
341 -- chain (filter-based will be added later)
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
342 for _, rule in ipairs(rules) do
1304
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
343 for _, condition in ipairs(rule.conditions) do
2070
2356114ff505 mod_firewall: Optimize string match operations, string.find is faster than .match since no string is returned
Kim Alvefur <zash@zash.se>
parents: 1343
diff changeset
344 if condition:find("^not%(.+%)$") then
1304
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
345 condition = condition:match("^not%((.+)%)$");
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
346 end
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
347 condition_uses[condition] = (condition_uses[condition] or 0) + 1;
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
348 end
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
349 end
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
350
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
351 local condition_cache, n_conditions = {}, 0;
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
352 for _, rule in ipairs(rules) do
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
353 for _, dep in ipairs(rule.deps) do
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
354 include_dep(dep, code);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
355 end
1303
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
356 table.insert(code, "\n\t\t");
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
357 local rule_code;
967
a88f33fe6970 mod_firewall: Don't add empty conditions check when no conditions are listed in a rule
Matthew Wild <mwild1@gmail.com>
parents: 966
diff changeset
358 if #rule.conditions > 0 then
996
37af655ca575 mod_firewall: Cache conditions, so that they are only calculated once per chain execution
Matthew Wild <mwild1@gmail.com>
parents: 980
diff changeset
359 for i, condition in ipairs(rule.conditions) do
1001
c0850793b716 mod_firewall: don't use %b() (not technically correct)
Matthew Wild <mwild1@gmail.com>
parents: 999
diff changeset
360 local negated = condition:match("^not%(.+%)$");
996
37af655ca575 mod_firewall: Cache conditions, so that they are only calculated once per chain execution
Matthew Wild <mwild1@gmail.com>
parents: 980
diff changeset
361 if negated then
37af655ca575 mod_firewall: Cache conditions, so that they are only calculated once per chain execution
Matthew Wild <mwild1@gmail.com>
parents: 980
diff changeset
362 condition = condition:match("^not%((.+)%)$");
37af655ca575 mod_firewall: Cache conditions, so that they are only calculated once per chain execution
Matthew Wild <mwild1@gmail.com>
parents: 980
diff changeset
363 end
1304
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
364 if condition_uses[condition] > 1 then
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
365 local name = condition_cache[condition];
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
366 if not name then
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
367 n_conditions = n_conditions + 1;
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
368 name = "condition"..n_conditions;
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
369 condition_cache[condition] = name;
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
370 table.insert(code, "local "..name.." = "..condition..";\n\t\t");
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
371 end
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
372 rule.conditions[i] = (negated and "not(" or "")..name..(negated and ")" or "");
996
37af655ca575 mod_firewall: Cache conditions, so that they are only calculated once per chain execution
Matthew Wild <mwild1@gmail.com>
parents: 980
diff changeset
373 else
1304
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
374 rule.conditions[i] = (negated and "not(" or "(")..condition..")";
996
37af655ca575 mod_firewall: Cache conditions, so that they are only calculated once per chain execution
Matthew Wild <mwild1@gmail.com>
parents: 980
diff changeset
375 end
37af655ca575 mod_firewall: Cache conditions, so that they are only calculated once per chain execution
Matthew Wild <mwild1@gmail.com>
parents: 980
diff changeset
376 end
1304
9f24ccaa66a6 mod_firewall: Do not cache conditions with only a single use
Florian Zeitz <florob@babelmonkeys.de>
parents: 1303
diff changeset
377
1303
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
378 rule_code = "if "..table.concat(rule.conditions, " and ").." then\n\t\t\t"
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
379 ..table.concat(rule.actions, "\n\t\t\t")
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
380 .."\n\t\tend\n";
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
381 else
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
382 rule_code = table.concat(rule.actions, "\n\t\t");
967
a88f33fe6970 mod_firewall: Don't add empty conditions check when no conditions are listed in a rule
Matthew Wild <mwild1@gmail.com>
parents: 966
diff changeset
383 end
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
384 table.insert(code, rule_code);
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
385 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
386
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: 998
diff changeset
387 for name in pairs(definition_handlers) do
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: 998
diff changeset
388 table.insert(code.global_header, 1, "local "..name:lower().."s = definitions."..name..";");
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: 998
diff changeset
389 end
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: 998
diff changeset
390
1303
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
391 local code_string = "return function (definitions, fire_event, log)\n\t"
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
392 ..table.concat(code.global_header, "\n\t")
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
393 .."\n\tlocal db = require 'util.debug';\n\n\t"
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
394 .."return function (event)\n\t\t"
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
395 .."local stanza, session = event.stanza, event.origin;\n"
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
396 ..table.concat(code, "")
8a3f3f485675 mod_firewall: Produce code with nicer indentation
Florian Zeitz <florob@babelmonkeys.de>
parents: 1052
diff changeset
397 .."\n\tend;\nend";
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
398
956
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
399 chain_handlers[chain_name] = code_string;
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
400 end
1343
7dbde05b48a9 all the things: Remove trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
401
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
402 return chain_handlers;
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
403 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
404
2078
11539785cb92 mod_firewall: Split compile function into two parts in order to separate their scopes
Kim Alvefur <zash@zash.se>
parents: 2077
diff changeset
405 local function compile_firewall_rules(filename)
11539785cb92 mod_firewall: Split compile function into two parts in order to separate their scopes
Kim Alvefur <zash@zash.se>
parents: 2077
diff changeset
406 local ruleset, err = parse_firewall_rules(filename);
11539785cb92 mod_firewall: Split compile function into two parts in order to separate their scopes
Kim Alvefur <zash@zash.se>
parents: 2077
diff changeset
407 if not ruleset then return nil, err; end
11539785cb92 mod_firewall: Split compile function into two parts in order to separate their scopes
Kim Alvefur <zash@zash.se>
parents: 2077
diff changeset
408 local chain_handlers = process_firewall_rules(ruleset);
11539785cb92 mod_firewall: Split compile function into two parts in order to separate their scopes
Kim Alvefur <zash@zash.se>
parents: 2077
diff changeset
409 return chain_handlers;
11539785cb92 mod_firewall: Split compile function into two parts in order to separate their scopes
Kim Alvefur <zash@zash.se>
parents: 2077
diff changeset
410 end
11539785cb92 mod_firewall: Split compile function into two parts in order to separate their scopes
Kim Alvefur <zash@zash.se>
parents: 2077
diff changeset
411
956
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
412 local function compile_handler(code_string, filename)
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
413 -- Prepare event handler function
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
414 local chunk, err = loadstring(code_string, "="..filename);
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
415 if not chunk then
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
416 return nil, "Error compiling (probably a compiler bug, please report): "..err;
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
417 end
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
418 local function fire_event(name, data)
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
419 return module:fire_event(name, data);
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
420 end
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: 998
diff changeset
421 chunk = chunk()(active_definitions, fire_event, logger(filename)); -- Returns event handler with 'zones' upvalue.
956
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
422 return chunk;
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
423 end
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
424
2366
14021c93a962 mod_firewall: Allow prefixing script paths with 'module:' to specify path relative to module file
Matthew Wild <mwild1@gmail.com>
parents: 2365
diff changeset
425 local function resolve_script_path(script_path)
14021c93a962 mod_firewall: Allow prefixing script paths with 'module:' to specify path relative to module file
Matthew Wild <mwild1@gmail.com>
parents: 2365
diff changeset
426 local relative_to = prosody.paths.config;
14021c93a962 mod_firewall: Allow prefixing script paths with 'module:' to specify path relative to module file
Matthew Wild <mwild1@gmail.com>
parents: 2365
diff changeset
427 if script_path:match("^module:") then
14021c93a962 mod_firewall: Allow prefixing script paths with 'module:' to specify path relative to module file
Matthew Wild <mwild1@gmail.com>
parents: 2365
diff changeset
428 relative_to = module.path:sub(1, -#("/mod_"..module.name..".lua"));
14021c93a962 mod_firewall: Allow prefixing script paths with 'module:' to specify path relative to module file
Matthew Wild <mwild1@gmail.com>
parents: 2365
diff changeset
429 script_path = script_path:match("^module:(.+)$");
14021c93a962 mod_firewall: Allow prefixing script paths with 'module:' to specify path relative to module file
Matthew Wild <mwild1@gmail.com>
parents: 2365
diff changeset
430 end
14021c93a962 mod_firewall: Allow prefixing script paths with 'module:' to specify path relative to module file
Matthew Wild <mwild1@gmail.com>
parents: 2365
diff changeset
431 return resolve_relative_path(relative_to, script_path);
14021c93a962 mod_firewall: Allow prefixing script paths with 'module:' to specify path relative to module file
Matthew Wild <mwild1@gmail.com>
parents: 2365
diff changeset
432 end
14021c93a962 mod_firewall: Allow prefixing script paths with 'module:' to specify path relative to module file
Matthew Wild <mwild1@gmail.com>
parents: 2365
diff changeset
433
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
434 function module.load()
1052
80f0a3231c59 mod_firewall: Add support for being called as a prosodyctl command
Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
435 if not prosody.arg then return end -- Don't run in prosodyctl
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: 998
diff changeset
436 active_definitions = {};
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
437 local firewall_scripts = module:get_option_set("firewall_scripts", {});
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
438 for script in firewall_scripts do
2366
14021c93a962 mod_firewall: Allow prefixing script paths with 'module:' to specify path relative to module file
Matthew Wild <mwild1@gmail.com>
parents: 2365
diff changeset
439 script = resolve_script_path(script);
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
440 local chain_functions, err = compile_firewall_rules(script)
1343
7dbde05b48a9 all the things: Remove trailing whitespace
Florian Zeitz <florob@babelmonkeys.de>
parents: 1325
diff changeset
441
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
442 if not chain_functions then
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
443 module:log("error", "Error compiling %s: %s", script, err or "unknown error");
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
444 else
956
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
445 for chain, handler_code in pairs(chain_functions) do
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
446 local handler, err = compile_handler(handler_code, "mod_firewall::"..chain);
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
447 if not handler then
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
448 module:log("error", "Compilation error for %s: %s", script, err);
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
449 else
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
450 local chain_definition = chains[chain];
1325
b21236b6b8d8 Backed out changeset 853a382c9bd6
Kim Alvefur <zash@zash.se>
parents: 1324
diff changeset
451 if chain_definition and chain_definition.type == "event" then
b21236b6b8d8 Backed out changeset 853a382c9bd6
Kim Alvefur <zash@zash.se>
parents: 1324
diff changeset
452 for _, event_name in ipairs(chain_definition) do
b21236b6b8d8 Backed out changeset 853a382c9bd6
Kim Alvefur <zash@zash.se>
parents: 1324
diff changeset
453 module:hook(event_name, handler, chain_definition.priority);
956
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
454 end
2070
2356114ff505 mod_firewall: Optimize string match operations, string.find is faster than .match since no string is returned
Kim Alvefur <zash@zash.se>
parents: 1343
diff changeset
455 elseif not chain:sub(1, 5) == "user/" then
956
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
456 module:log("warn", "Unknown chain %q", chain);
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
457 end
956
33d6642f4db7 mod_firewall: Tighten up error handling, and split rules->Lua and Lua->bytecode compilation into separate functions
Matthew Wild <mwild1@gmail.com>
parents: 955
diff changeset
458 module:hook("firewall/chains/"..chain, handler);
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
459 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
460 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
461 end
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
462 end
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: 998
diff changeset
463 -- Replace contents of definitions table (shared) with active definitions
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: 998
diff changeset
464 for k in it.keys(definitions) do definitions[k] = nil; end
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: 998
diff changeset
465 for k,v in pairs(active_definitions) do definitions[k] = v; end
947
c91cac3b823f mod_firewall: General stanza filtering plugin with a declarative rule-based syntax
Matthew Wild <mwild1@gmail.com>
parents:
diff changeset
466 end
1052
80f0a3231c59 mod_firewall: Add support for being called as a prosodyctl command
Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
467
80f0a3231c59 mod_firewall: Add support for being called as a prosodyctl command
Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
468 function module.command(arg)
80f0a3231c59 mod_firewall: Add support for being called as a prosodyctl command
Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
469 if not arg[1] or arg[1] == "--help" then
80f0a3231c59 mod_firewall: Add support for being called as a prosodyctl command
Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
470 require"util.prosodyctl".show_usage([[mod_firewall <firewall.pfw>]], [[Compile files with firewall rules to Lua code]]);
80f0a3231c59 mod_firewall: Add support for being called as a prosodyctl command
Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
471 return 1;
80f0a3231c59 mod_firewall: Add support for being called as a prosodyctl command
Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
472 end
2118
643b254e75de mod_firewall: Disable more realistic output by default, activated by adding a -v flag
Kim Alvefur <zash@zash.se>
parents: 2117
diff changeset
473 local verbose = arg[1] == "-v";
643b254e75de mod_firewall: Disable more realistic output by default, activated by adding a -v flag
Kim Alvefur <zash@zash.se>
parents: 2117
diff changeset
474 if verbose then table.remove(arg, 1); end
1052
80f0a3231c59 mod_firewall: Add support for being called as a prosodyctl command
Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
475
2117
5aa3b93cd37a mod_firewall: Make prosodyctl command output more realistic source (not guaranteed to work)
Kim Alvefur <zash@zash.se>
parents: 2113
diff changeset
476 local serialize = require "util.serialization".serialize;
2118
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477 if verbose then
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478 print("local logger = require \"util.logger\".init;");
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479 print();
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480 print("local function fire_event(name, data)\n\tmodule:fire_event(name, data)\nend");
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481 print();
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482 end
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Kim Alvefur <zash@zash.se>
parents: 2113
diff changeset
483
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Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
484 for _, filename in ipairs(arg) do
2366
14021c93a962 mod_firewall: Allow prefixing script paths with 'module:' to specify path relative to module file
Matthew Wild <mwild1@gmail.com>
parents: 2365
diff changeset
485 filename = resolve_script_path(filename);
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486 print("do -- File "..filename);
2365
05dae9adf778 mod_firewall: Fix for when compiling on the command line and specifying multiple files
Matthew Wild <mwild1@gmail.com>
parents: 2364
diff changeset
487 local chain_functions = assert(compile_firewall_rules(filename));
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488 if verbose then
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parents: 2117
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489 print();
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490 print("local active_definitions = "..serialize(active_definitions)..";");
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491 print();
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diff changeset
492 end
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Matthew Wild <mwild1@gmail.com>
parents: 2366
diff changeset
493 local c = 0;
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Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
494 for chain, handler_code in pairs(chain_functions) do
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Matthew Wild <mwild1@gmail.com>
parents: 2366
diff changeset
495 c = c + 1;
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parents: 2113
diff changeset
496 print("---- Chain "..chain:gsub("_", " "));
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Matthew Wild <mwild1@gmail.com>
parents: 2366
diff changeset
497 local chain_func_name = "chain_"..tostring(c).."_"..chain:gsub("%p", "_");
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diff changeset
498 if not verbose then
2367
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Matthew Wild <mwild1@gmail.com>
parents: 2366
diff changeset
499 print(("%s = %s;"):format(chain_func_name, handler_code:sub(8)));
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diff changeset
500 else
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Kim Alvefur <zash@zash.se>
parents: 2113
diff changeset
501
2367
3ebd3cb4d7d2 mod_firewall: When compiling on the command-line with -v, ensure chain function names are unique and valid ids
Matthew Wild <mwild1@gmail.com>
parents: 2366
diff changeset
502 print(("local %s = (%s)(active_definitions, fire_event, logger(%q));"):format(chain_func_name, handler_code:sub(8), filename));
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parents: 2117
diff changeset
503 print();
2117
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Kim Alvefur <zash@zash.se>
parents: 2113
diff changeset
504
2118
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Kim Alvefur <zash@zash.se>
parents: 2117
diff changeset
505 local chain_definition = chains[chain];
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Kim Alvefur <zash@zash.se>
parents: 2117
diff changeset
506 if chain_definition and chain_definition.type == "event" then
643b254e75de mod_firewall: Disable more realistic output by default, activated by adding a -v flag
Kim Alvefur <zash@zash.se>
parents: 2117
diff changeset
507 for _, event_name in ipairs(chain_definition) do
2367
3ebd3cb4d7d2 mod_firewall: When compiling on the command-line with -v, ensure chain function names are unique and valid ids
Matthew Wild <mwild1@gmail.com>
parents: 2366
diff changeset
508 print(("module:hook(%q, %s, %d);"):format(event_name, chain_func_name, chain_definition.priority or 0));
2118
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Kim Alvefur <zash@zash.se>
parents: 2117
diff changeset
509 end
2117
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Kim Alvefur <zash@zash.se>
parents: 2113
diff changeset
510 end
2367
3ebd3cb4d7d2 mod_firewall: When compiling on the command-line with -v, ensure chain function names are unique and valid ids
Matthew Wild <mwild1@gmail.com>
parents: 2366
diff changeset
511 print(("module:hook(%q, %s, %d);"):format("firewall/chains/"..chain, chain_func_name, chain_definition.priority or 0));
2117
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Kim Alvefur <zash@zash.se>
parents: 2113
diff changeset
512 end
5aa3b93cd37a mod_firewall: Make prosodyctl command output more realistic source (not guaranteed to work)
Kim Alvefur <zash@zash.se>
parents: 2113
diff changeset
513
5aa3b93cd37a mod_firewall: Make prosodyctl command output more realistic source (not guaranteed to work)
Kim Alvefur <zash@zash.se>
parents: 2113
diff changeset
514 print("---- End of chain "..chain);
5aa3b93cd37a mod_firewall: Make prosodyctl command output more realistic source (not guaranteed to work)
Kim Alvefur <zash@zash.se>
parents: 2113
diff changeset
515 print();
1052
80f0a3231c59 mod_firewall: Add support for being called as a prosodyctl command
Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
516 end
2117
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Kim Alvefur <zash@zash.se>
parents: 2113
diff changeset
517 print("end -- End of file "..filename);
1052
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Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
518 end
80f0a3231c59 mod_firewall: Add support for being called as a prosodyctl command
Kim Alvefur <zash@zash.se>
parents: 1051
diff changeset
519 end