prosody-modules
d814cc183c40
mod_host_guard/mod_host_guard.lua

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mod_host_guard/mod_host_guard.lua @ 912:d814cc183c40

mod_incidents_handling: recommit after full test, cleaned it a bit as what I posted was regretfully an unfinished draft, replaced a lot of the fixed type fields used for fields description with desc elements (upstream prosody's util.dataforms will still strip those). Also moved auxiliary functions to a library.
author Marco Cirillo <maranda@lightwitch.org>
date Sun, 17 Feb 2013 19:28:47 +0100
parent 834:21e99dc949ee
child 1343:7dbde05b48a9
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
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2 -- Block or restrict by blacklist remote access to local components or hosts.
456
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3
460
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4 module:set_global()
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5
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6 local hosts = hosts
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7 local incoming_s2s = prosody.incoming_s2s
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8
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parents: 460
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9 local guard_blockall = module:get_option_set("host_guard_blockall", {})
515
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10 local guard_ball_wl = module:get_option_set("host_guard_blockall_exceptions", {})
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parents: 460
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11 local guard_protect = module:get_option_set("host_guard_selective", {})
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12 local guard_block_bl = module:get_option_set("host_guard_blacklist", {})
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13
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14 local config = configmanager
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15 local error_reply = require "util.stanza".error_reply
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16 local tostring = tostring
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17
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18 local function s2s_hook (event)
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19 local origin, stanza = event.session or event.origin, event.stanza or false
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20 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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21
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22 if origin.type == "s2sin" or origin.type == "s2sin_unauthed" then
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23 if guard_blockall:contains(to_host) and not guard_ball_wl:contains(from_host) or
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24 guard_block_bl:contains(from_host) and guard_protect:contains(to_host) then
682
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25 module:log("error", "remote service %s attempted to access restricted host %s", from_host, to_host)
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26 origin:close({condition = "policy-violation", text = "You're not authorized, good bye."})
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27 return false
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28 end
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29 end
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30
528
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31 return nil
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32 end
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33
682
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34 local function rr_hook (event)
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35 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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36
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37 if guard_blockall:contains(from_host) and not guard_ball_wl:contains(to_host) or
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38 guard_block_bl:contains(to_host) and guard_protect:contains(from_host) then
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39 module:log("info", "attempted to connect to a filtered remote host %s", to_host)
684
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40 if stanza.attr.type ~= "error" then send(error_reply(event.stanza, "cancel", "policy-violation", "Communicating with a filtered remote server is not allowed.")) end
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41 return true
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42 end
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43
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44 return nil
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45 end
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46
728
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47 local function handle_activation (host, u)
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48 if guard_blockall:contains(host) or guard_protect:contains(host) then
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49 if hosts[host] and config.get(host, "core", "authentication") ~= "anonymous" then
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50 hosts[host].events.add_handler("s2sin-established", s2s_hook, 500)
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51 hosts[host].events.add_handler("route/remote", rr_hook, 500)
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52 hosts[host].events.add_handler("stanza/jabber:server:dialback:result", s2s_hook, 500)
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53 if not u then
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54 module:log ("debug", "adding host protection for: "..host)
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55 else
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56 module:log ("debug", "updating or adding host protection for: "..host)
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57 end
456
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58 end
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59 end
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60 end
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61
728
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62 local function handle_deactivation (host, u, i)
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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 config.get(host, "core", "authentication") ~= "anonymous" then
680
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parents: 537
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65 hosts[host].events.remove_handler("s2sin-established", s2s_hook)
682
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66 hosts[host].events.remove_handler("route/remote", rr_hook)
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67 hosts[host].events.remove_handler("stanza/jabber:server:dialback:result", s2s_hook)
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68 if not u and not i then module:log ("debug", "removing host protection for: "..host) end
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69 end
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70 end
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71 end
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72
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73 local function close_filtered()
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74 for _, host in pairs(hosts) do
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75 for name, session in pairs(host.s2sout) do
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76 if guard_blockall:contains(session.host) and not guard_ball_wl:contains(session.to_host) or
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77 guard_block_bl:contains(session.to_host) and guard_protect:contains(session.host) then
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78 module:log("info", "closing down s2s outgoing stream to filtered entity %s", tostring(session.to_host))
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79 session:close()
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80 end
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81 end
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82 end
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83 for session in pairs(incoming_s2s) do
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84 if session.to_host and session.from_host and
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85 (guard_blockall:contains(session.to_host) and not guard_ball_wl:contains(session.from_host) or
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86 guard_block_bl:contains(session.from_host) and guard_protect:contains(session.to_host)) then
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87 module:log("info", "closing down s2s incoming stream from filtered entity %s", tostring(session.from_host))
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88 session:close()
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89 end
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90 end
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91 end
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92
728
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93 local function init_hosts(u, i)
725
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94 for n in pairs(hosts) do
727
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95 if guard_blockall:contains(n) or guard_protect:contains(n) then
834
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96 handle_deactivation(n, u, i) ; handle_activation(n, u)
727
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97 end
537
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98 end
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99 close_filtered()
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100 end
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101
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102 local function reload()
528
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103 module:log ("debug", "server configuration reloaded, rehashing plugin tables...")
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104 guard_blockall = module:get_option_set("host_guard_blockall", {})
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105 guard_ball_wl = module:get_option_set("host_guard_blockall_exceptions", {})
537
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106 guard_protect = module:get_option_set("host_guard_selective", {})
528
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107 guard_block_bl = module:get_option_set("host_guard_blacklist", {})
537
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108
728
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109 init_hosts(true)
458
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110 end
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111
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parents: 457
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112 local function setup()
528
1737c08fde30 mod_host_guard: stick to one code "punctuation" style.
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parents: 519
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113 module:log ("debug", "initializing host guard module...")
537
50be30f203f3 mod_host_guard: fixed plugin, minor code refactor.
Marco Cirillo <maranda@lightwitch.org>
parents: 533
diff changeset
114 module:hook ("host-activated", handle_activation)
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parents: 533
diff changeset
115 module:hook ("host-deactivated", handle_deactivation)
528
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parents: 519
diff changeset
116 module:hook ("config-reloaded", reload)
458
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diff changeset
117
728
8ad2e24f5efd mod_host_guard: reduced code duplication and added better logging.
Marco Cirillo <maranda@lightwitch.org>
parents: 727
diff changeset
118 init_hosts(false, true)
456
73f06a14390a mod_component_guard: initial commit.
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parents:
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119 end
458
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120
725
f79fda2d7e51 mod_host_guard: host handlers are now cleaned properly on module unload (and also still on re/load to be safe).
Marco Cirillo <maranda@lightwitch.org>
parents: 724
diff changeset
121 function module.unload()
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122 module:log ("debug", "removing host handlers as module is being unloaded...")
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parents: 724
diff changeset
123 for n in pairs(hosts) do
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124 hosts[n].events.remove_handler("s2sin-established", s2s_hook)
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parents: 724
diff changeset
125 hosts[n].events.remove_handler("route/remote", rr_hook)
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parents: 724
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126 hosts[n].events.remove_handler("stanza/jabber:server:dialback:result", s2s_hook)
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parents: 724
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127 end
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128 end
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129
458
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diff changeset
130 if prosody.start_time then
528
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parents: 519
diff changeset
131 setup()
458
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parents: 457
diff changeset
132 else
533
47b9053dba38 mod_host_guard: replaced prosody.events.add_handler with module:hook.
Marco Cirillo <maranda@lightwitch.org>
parents: 528
diff changeset
133 module:hook ("server-started", setup)
458
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parents: 457
diff changeset
134 end