prosody-modules
50be30f203f3
mod_host_guard/mod_host_guard.lua

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mod_host_guard/mod_host_guard.lua @ 537:50be30f203f3

mod_host_guard: fixed plugin, minor code refactor.
author Marco Cirillo <maranda@lightwitch.org>
date Sun, 08 Jan 2012 05:25:49 +0000
parent 533:47b9053dba38
child 680:a2cea070f2c7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 -- (C) 2011, Marco Cirillo (LW.Org)
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2 -- Block or restrict by blacklist remote access to local components or hosts.
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3
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4 module:set_global()
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5
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6 local guard_blockall = module:get_option_set("host_guard_blockall", {})
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7 local guard_ball_wl = module:get_option_set("host_guard_blockall_exceptions", {})
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8 local guard_protect = module:get_option_set("host_guard_selective", {})
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9 local guard_block_bl = module:get_option_set("host_guard_blacklist", {})
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10
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11 local s2smanager = require "core.s2smanager"
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12 local config = require "core.configmanager"
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13 local nameprep = require "util.encodings".stringprep.nameprep
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14
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15 local _make_connect = s2smanager.make_connect
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16 function s2smanager.make_connect(session, connect_host, connect_port)
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17 if not session.s2sValidation then
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18 if guard_blockall:contains(session.from_host) and not guard_ball_wl:contains(session.to_host) or
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19 guard_block_bl:contains(session.to_host) and guard_protect:contains(session.from_host) then
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20 module:log("error", "remote service %s attempted to access restricted host %s", session.to_host, session.from_host)
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21 s2smanager.destroy_session(session, "You're not authorized, good bye.")
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22 return false;
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23 end
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24 end
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25 return _make_connect(session, connect_host, connect_port)
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26 end
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27
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28 local _stream_opened = s2smanager.streamopened
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29 function s2smanager.streamopened(session, attr)
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30 local host = attr.to and nameprep(attr.to)
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31 local from = attr.from and nameprep(attr.from)
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32 if not from then
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33 session.s2sValidation = false
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34 else
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35 session.s2sValidation = true
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36 end
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37
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38 if guard_blockall:contains(host) and not guard_ball_wl:contains(from) or
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39 guard_block_bl:contains(from) and guard_protect:contains(host) then
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40 module:log("error", "remote service %s attempted to access restricted host %s", from, host)
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41 session:close({condition = "policy-violation", text = "You're not authorized, good bye."})
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42 return false;
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43 end
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44 _stream_opened(session, attr)
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45 end
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46
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47 local function sdr_hook (event)
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48 local origin, stanza = event.origin, event.stanza
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49
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50 if origin.type == "s2sin" or origin.type == "s2sin_unauthed" then
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51 if guard_blockall:contains(stanza.attr.to) and not guard_ball_wl:contains(stanza.attr.from) or
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52 guard_block_bl:contains(stanza.attr.from) and guard_protect:contains(stanza.attr.to) then
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53 module:log("error", "remote service %s attempted to access restricted host %s", stanza.attr.from, stanza.attr.to)
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54 origin:close({condition = "policy-violation", text = "You're not authorized, good bye."})
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55 return false
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56 end
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57 end
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58
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59 return nil
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60 end
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61
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62 local function handle_activation (host)
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63 if guard_blockall:contains(host) or guard_protect:contains(host) then
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64 if hosts[host] and hosts[host].events then
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65 hosts[host].events.add_handler("stanza/jabber:server:dialback:result", sdr_hook, 100)
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66 module:log ("debug", "adding host protection for: "..host)
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67 end
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68 end
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69 end
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70
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71 local function handle_deactivation (host)
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72 if guard_blockall:contains(host) or guard_protect:contains(host) then
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73 if hosts[host] and hosts[host].events then
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74 hosts[host].events.remove_handler("stanza/jabber:server:dialback:result", sdr_hook)
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75 module:log ("debug", "removing host protection for: "..host)
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76 end
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77 end
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78 end
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79
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80 local function init_hosts()
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81 for n,table in pairs(hosts) do
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82 hosts[n].events.remove_handler("stanza/jabber:server:dialback:result", sdr_hook)
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83 if guard_blockall:contains(n) or guard_protect:contains(n) then handle_activation(n) end
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84 end
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85 end
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86
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87 local function reload()
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88 module:log ("debug", "server configuration reloaded, rehashing plugin tables...")
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89 guard_blockall = module:get_option_set("host_guard_blockall", {})
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90 guard_ball_wl = module:get_option_set("host_guard_blockall_exceptions", {})
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91 guard_protect = module:get_option_set("host_guard_selective", {})
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92 guard_block_bl = module:get_option_set("host_guard_blacklist", {})
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93
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94 init_hosts()
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95 end
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96
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97 local function setup()
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98 module:log ("debug", "initializing host guard module...")
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99 module:hook ("host-activated", handle_activation)
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100 module:hook ("host-deactivated", handle_deactivation)
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101 module:hook ("config-reloaded", reload)
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102
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103 init_hosts()
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104 end
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105
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106 if prosody.start_time then
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107 setup()
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108 else
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109 module:hook ("server-started", setup)
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110 end