prosody-modules
f79fda2d7e51
mod_host_guard/mod_host_guard.lua

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mod_host_guard/mod_host_guard.lua @ 725:f79fda2d7e51

mod_host_guard: host handlers are now cleaned properly on module unload (and also still on re/load to be safe).
author Marco Cirillo <maranda@lightwitch.org>
date Mon, 25 Jun 2012 23:26:09 +0000
parent 724:b94010de43f6
child 726:455a9b8fac27
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
493
b1b80319bbf6 mod_host_guard: renamed mod_component_guard to mod_host_guard, as it really works with all hosts, finally decided to wiki it out and not merge it with the s2s_blackwhitelisting module.
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parents: 460
diff changeset
1 -- (C) 2011, Marco Cirillo (LW.Org)
519
219ffe3541ff mod_host_guard: updated banner.
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2 -- Block or restrict by blacklist remote access to local components or hosts.
456
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3
460
9bb9343f3c7a mod_component_guard: made module global, refactored init.
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4 module:set_global()
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5
493
b1b80319bbf6 mod_host_guard: renamed mod_component_guard to mod_host_guard, as it really works with all hosts, finally decided to wiki it out and not merge it with the s2s_blackwhitelisting module.
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parents: 460
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6 local guard_blockall = module:get_option_set("host_guard_blockall", {})
515
e98fe28c50b0 mod_host_guard: added exceptions/whitelisting to the blockall logic (makes little sense otherwise has s2s_disallow = true does the same)
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parents: 494
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7 local guard_ball_wl = module:get_option_set("host_guard_blockall_exceptions", {})
493
b1b80319bbf6 mod_host_guard: renamed mod_component_guard to mod_host_guard, as it really works with all hosts, finally decided to wiki it out and not merge it with the s2s_blackwhitelisting module.
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parents: 460
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8 local guard_protect = module:get_option_set("host_guard_selective", {})
b1b80319bbf6 mod_host_guard: renamed mod_component_guard to mod_host_guard, as it really works with all hosts, finally decided to wiki it out and not merge it with the s2s_blackwhitelisting module.
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parents: 460
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9 local guard_block_bl = module:get_option_set("host_guard_blacklist", {})
456
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parents:
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10
724
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parents: 686
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11 local config = configmanager
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parents: 681
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12 local error_reply = require "util.stanza".error_reply
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13
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14 local function s2s_hook (event)
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15 local origin, stanza = event.session or event.origin, event.stanza or false
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16 local to_host, from_host = (not stanza and origin.to_host) or stanza.attr.to, (not stanza and origin.from_host) or stanza.attr.from
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17
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18 if origin.type == "s2sin" or origin.type == "s2sin_unauthed" then
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parents: 537
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19 if guard_blockall:contains(to_host) and not guard_ball_wl:contains(from_host) or
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20 guard_block_bl:contains(from_host) and guard_protect:contains(to_host) then
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parents: 681
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21 module:log("error", "remote service %s attempted to access restricted host %s", from_host, to_host)
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22 origin:close({condition = "policy-violation", text = "You're not authorized, good bye."})
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23 return false
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24 end
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25 end
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26
528
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27 return nil
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28 end
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29
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30 local function rr_hook (event)
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31 local from_host, to_host, send, stanza = event.from_host, event.to_host, (event.origin and event.origin.send) or function() end, event.stanza
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32
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parents: 681
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33 if guard_blockall:contains(from_host) and not guard_ball_wl:contains(to_host) or
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parents: 681
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34 guard_block_bl:contains(to_host) and guard_protect:contains(from_host) then
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parents: 681
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35 module:log("info", "attempted to connect to a filtered remote host %s", to_host)
684
27529031890b mod_host_guard: now a proper error is returned when stanzas are routed to a filtered remote server (thanks Zash)
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parents: 683
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36 if stanza.attr.type ~= "error" then send(error_reply(event.stanza, "cancel", "policy-violation", "Communicating with a filtered remote server is not allowed.")) end
27529031890b mod_host_guard: now a proper error is returned when stanzas are routed to a filtered remote server (thanks Zash)
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parents: 683
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37 return true
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38 end
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parents: 681
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39
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parents: 681
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40 return nil
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41 end
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42
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43 local function handle_activation (host)
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44 if guard_blockall:contains(host) or guard_protect:contains(host) then
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45 if hosts[host] and hosts[host].events then
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parents: 537
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46 hosts[host].events.add_handler("s2sin-established", s2s_hook, 500)
682
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47 hosts[host].events.add_handler("route/remote", rr_hook, 500)
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parents: 537
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48 hosts[host].events.add_handler("stanza/jabber:server:dialback:result", s2s_hook, 500)
528
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49 module:log ("debug", "adding host protection for: "..host)
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50 end
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51 end
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52 end
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53
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54 local function handle_deactivation (host)
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55 if guard_blockall:contains(host) or guard_protect:contains(host) then
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56 if hosts[host] and hosts[host].events then
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parents: 537
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57 hosts[host].events.remove_handler("s2sin-established", s2s_hook)
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58 hosts[host].events.remove_handler("route/remote", rr_hook)
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59 hosts[host].events.remove_handler("stanza/jabber:server:dialback:result", s2s_hook)
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60 module:log ("debug", "removing host protection for: "..host)
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61 end
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62 end
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63 end
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64
537
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65 local function init_hosts()
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66 for n in pairs(hosts) do
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67 -- This is a bit redundant but better safe then sorry.
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68 hosts[n].events.remove_handler("s2sin-established", s2s_hook)
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parents: 681
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69 hosts[n].events.remove_handler("route/remote", rr_hook)
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parents: 537
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70 hosts[n].events.remove_handler("stanza/jabber:server:dialback:result", s2s_hook)
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parents: 533
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71 if guard_blockall:contains(n) or guard_protect:contains(n) then handle_activation(n) end
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72 end
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73 end
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74
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75 local function reload()
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76 module:log ("debug", "server configuration reloaded, rehashing plugin tables...")
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77 guard_blockall = module:get_option_set("host_guard_blockall", {})
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78 guard_ball_wl = module:get_option_set("host_guard_blockall_exceptions", {})
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79 guard_protect = module:get_option_set("host_guard_selective", {})
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80 guard_block_bl = module:get_option_set("host_guard_blacklist", {})
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81
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82 init_hosts()
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83 end
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84
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85 local function setup()
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86 module:log ("debug", "initializing host guard module...")
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87 module:hook ("host-activated", handle_activation)
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88 module:hook ("host-deactivated", handle_deactivation)
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89 module:hook ("config-reloaded", reload)
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90
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91 init_hosts()
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92 end
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93
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94 function module.unload()
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95 module:log ("debug", "removing host handlers as module is being unloaded...")
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96 for n in pairs(hosts) do
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97 hosts[n].events.remove_handler("s2sin-established", s2s_hook)
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parents: 724
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98 hosts[n].events.remove_handler("route/remote", rr_hook)
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99 hosts[n].events.remove_handler("stanza/jabber:server:dialback:result", s2s_hook)
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100 end
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101 end
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102
458
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parents: 457
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103 if prosody.start_time then
528
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104 setup()
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105 else
533
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106 module:hook ("server-started", setup)
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parents: 457
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107 end
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108