Mercurial > prosody-modules

annotate mod_host_guard/mod_host_guard.lua @ 4646:072d078be095

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mod_storage_xmlarchive: Advertise capabilities (none atm) Both 'total' and 'quota' would be prohibitively expensive for the kind of archives this module targets as it would require counting items across the entire archive.
author Kim Alvefur <zash@zash.se>
date Fri, 13 Aug 2021 01:18:32 +0200
parents 7dbde05b48a9
children
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.
Marco Cirillo <maranda@lightwitch.org>
parents: 460
diff changeset
1 -- (C) 2011, Marco Cirillo (LW.Org)
519
219ffe3541ff mod_host_guard: updated banner.
Marco Cirillo <maranda@lightwitch.org>
parents: 515
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2 -- Block or restrict by blacklist remote access to local components or hosts.
456
73f06a14390a mod_component_guard: initial commit.
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parents:
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3
460
9bb9343f3c7a mod_component_guard: made module global, refactored init.
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parents: 459
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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
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.
Marco Cirillo <maranda@lightwitch.org>
parents: 460
diff changeset
9 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)
Marco Cirillo <maranda@lightwitch.org>
parents: 494
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10 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.
Marco Cirillo <maranda@lightwitch.org>
parents: 460
diff changeset
11 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.
Marco Cirillo <maranda@lightwitch.org>
parents: 460
diff changeset
12 local guard_block_bl = module:get_option_set("host_guard_blacklist", {})
456
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parents:
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13
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b94010de43f6 mod_host_guard: referenced configmanager from prosody's _G instead of requiring it.
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parents: 686
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14 local config = configmanager
682
3ab1cf30a848 mod_host_guard: using route/remote event hook to stop outgoing connections to filtered entities, yet the returned error is highly misleading.
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parents: 681
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15 local error_reply = require "util.stanza".error_reply
834
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16 local tostring = tostring
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17
680
a2cea070f2c7 mod_host_guard: removed calls to s2smanager and made the module not dependant on it.
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parents: 537
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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
680
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parents: 537
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23 if guard_blockall:contains(to_host) and not guard_ball_wl:contains(from_host) or
a2cea070f2c7 mod_host_guard: removed calls to s2smanager and made the module not dependant on it.
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parents: 537
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24 guard_block_bl:contains(from_host) and guard_protect:contains(to_host) then
682
3ab1cf30a848 mod_host_guard: using route/remote event hook to stop outgoing connections to filtered entities, yet the returned error is highly misleading.
Marco Cirillo <maranda@lightwitch.org>
parents: 681
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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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parents: 519
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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
3ab1cf30a848 mod_host_guard: using route/remote event hook to stop outgoing connections to filtered entities, yet the returned error is highly misleading.
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parents: 681
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34 local function rr_hook (event)
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19698c5f3ab3 mod_host_guard: prevent possible traces in case there isn't a conn object on the session by adding a dummy replacement function.
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parents: 684
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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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parents: 681
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36
3ab1cf30a848 mod_host_guard: using route/remote event hook to stop outgoing connections to filtered entities, yet the returned error is highly misleading.
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parents: 681
diff changeset
37 if guard_blockall:contains(from_host) and not guard_ball_wl:contains(to_host) or
3ab1cf30a848 mod_host_guard: using route/remote event hook to stop outgoing connections to filtered entities, yet the returned error is highly misleading.
Marco Cirillo <maranda@lightwitch.org>
parents: 681
diff changeset
38 guard_block_bl:contains(to_host) and guard_protect:contains(from_host) then
3ab1cf30a848 mod_host_guard: using route/remote event hook to stop outgoing connections to filtered entities, yet the returned error is highly misleading.
Marco Cirillo <maranda@lightwitch.org>
parents: 681
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39 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)
Marco Cirillo <maranda@lightwitch.org>
parents: 683
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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
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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41 return true
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parents: 681
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42 end
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43
3ab1cf30a848 mod_host_guard: using route/remote event hook to stop outgoing connections to filtered entities, yet the returned error is highly misleading.
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parents: 681
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44 return nil
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parents: 681
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45 end
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46
728
8ad2e24f5efd mod_host_guard: reduced code duplication and added better logging.
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47 local function handle_activation (host, u)
456
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48 if guard_blockall:contains(host) or guard_protect:contains(host) then
818
bf23a8966e20 mod_host_guard: fix typos into the code, the operators were supposed to be "not equal".
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parents: 817
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49 if hosts[host] and config.get(host, "core", "authentication") ~= "anonymous" then
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a2cea070f2c7 mod_host_guard: removed calls to s2smanager and made the module not dependant on it.
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parents: 537
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50 hosts[host].events.add_handler("s2sin-established", s2s_hook, 500)
682
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parents: 681
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51 hosts[host].events.add_handler("route/remote", rr_hook, 500)
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parents: 537
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52 hosts[host].events.add_handler("stanza/jabber:server:dialback:result", s2s_hook, 500)
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Florian Zeitz <florob@babelmonkeys.de>
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53 if not u then
728
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54 module:log ("debug", "adding host protection for: "..host)
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55 else
729
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56 module:log ("debug", "updating or adding host protection for: "..host)
728
8ad2e24f5efd mod_host_guard: reduced code duplication and added better logging.
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57 end
456
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58 end
73f06a14390a mod_component_guard: initial commit.
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59 end
73f06a14390a mod_component_guard: initial commit.
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60 end
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61
728
8ad2e24f5efd mod_host_guard: reduced code duplication and added better logging.
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parents: 727
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62 local function handle_deactivation (host, u, i)
456
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parents:
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63 if guard_blockall:contains(host) or guard_protect:contains(host) then
818
bf23a8966e20 mod_host_guard: fix typos into the code, the operators were supposed to be "not equal".
Marco Cirillo <maranda@lightwitch.org>
parents: 817
diff changeset
64 if hosts[host] and config.get(host, "core", "authentication") ~= "anonymous" then
680
a2cea070f2c7 mod_host_guard: removed calls to s2smanager and made the module not dependant on it.
Marco Cirillo <maranda@lightwitch.org>
parents: 537
diff changeset
65 hosts[host].events.remove_handler("s2sin-established", s2s_hook)
682
3ab1cf30a848 mod_host_guard: using route/remote event hook to stop outgoing connections to filtered entities, yet the returned error is highly misleading.
Marco Cirillo <maranda@lightwitch.org>
parents: 681
diff changeset
66 hosts[host].events.remove_handler("route/remote", rr_hook)
680
a2cea070f2c7 mod_host_guard: removed calls to s2smanager and made the module not dependant on it.
Marco Cirillo <maranda@lightwitch.org>
parents: 537
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67 hosts[host].events.remove_handler("stanza/jabber:server:dialback:result", s2s_hook)
728
8ad2e24f5efd mod_host_guard: reduced code duplication and added better logging.
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parents: 727
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68 if not u and not i then module:log ("debug", "removing host protection for: "..host) end
456
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69 end
73f06a14390a mod_component_guard: initial commit.
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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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parents: 818
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75 for name, session in pairs(host.s2sout) do
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parents: 818
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76 if guard_blockall:contains(session.host) and not guard_ball_wl:contains(session.to_host) or
21e99dc949ee mod_host_guard: close down streams from and to filtered entities, on initialization / configuration reload.
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parents: 818
diff changeset
77 guard_block_bl:contains(session.to_host) and guard_protect:contains(session.host) then
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parents: 818
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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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parents: 818
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82 end
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83 for session in pairs(incoming_s2s) do
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parents: 818
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84 if session.to_host and session.from_host and
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parents: 818
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85 (guard_blockall:contains(session.to_host) and not guard_ball_wl:contains(session.from_host) or
21e99dc949ee mod_host_guard: close down streams from and to filtered entities, on initialization / configuration reload.
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parents: 818
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86 guard_block_bl:contains(session.from_host) and guard_protect:contains(session.to_host)) then
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parents: 818
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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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parents: 727
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93 local function init_hosts(u, i)
725
f79fda2d7e51 mod_host_guard: host handlers are now cleaned properly on module unload (and also still on re/load to be safe).
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parents: 724
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94 for n in pairs(hosts) do
727
99f5846bcd85 mod_host_guard: during configuration reload the host handlers should be reinitialized as well, so reverted changed and added back the "redundant code".
Marco Cirillo <maranda@lightwitch.org>
parents: 726
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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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parents: 726
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97 end
537
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parents: 533
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98 end
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99 close_filtered()
537
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100 end
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parents: 533
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101
458
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Marco Cirillo <maranda@lightwitch.org>
parents: 457
diff changeset
102 local function reload()
528
1737c08fde30 mod_host_guard: stick to one code "punctuation" style.
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parents: 519
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103 module:log ("debug", "server configuration reloaded, rehashing plugin tables...")
1737c08fde30 mod_host_guard: stick to one code "punctuation" style.
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parents: 519
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104 guard_blockall = module:get_option_set("host_guard_blockall", {})
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Marco Cirillo <maranda@lightwitch.org>
parents: 519
diff changeset
105 guard_ball_wl = module:get_option_set("host_guard_blockall_exceptions", {})
537
50be30f203f3 mod_host_guard: fixed plugin, minor code refactor.
Marco Cirillo <maranda@lightwitch.org>
parents: 533
diff changeset
106 guard_protect = module:get_option_set("host_guard_selective", {})
528
1737c08fde30 mod_host_guard: stick to one code "punctuation" style.
Marco Cirillo <maranda@lightwitch.org>
parents: 519
diff changeset
107 guard_block_bl = module:get_option_set("host_guard_blacklist", {})
537
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parents: 533
diff changeset
108
728
8ad2e24f5efd mod_host_guard: reduced code duplication and added better logging.
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parents: 727
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109 init_hosts(true)
458
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parents: 457
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110 end
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parents: 457
diff changeset
111
4149fcacbbf1 mod_component_guard: refactored init code, added reloading logic to prevent events pollution with stale dupes.
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parents: 457
diff changeset
112 local function setup()
528
1737c08fde30 mod_host_guard: stick to one code "punctuation" style.
Marco Cirillo <maranda@lightwitch.org>
parents: 519
diff changeset
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)
50be30f203f3 mod_host_guard: fixed plugin, minor code refactor.
Marco Cirillo <maranda@lightwitch.org>
parents: 533
diff changeset
115 module:hook ("host-deactivated", handle_deactivation)
528
1737c08fde30 mod_host_guard: stick to one code "punctuation" style.
Marco Cirillo <maranda@lightwitch.org>
parents: 519
diff changeset
116 module:hook ("config-reloaded", reload)
458
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parents: 457
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.
Marco Cirillo <maranda@lightwitch.org>
parents:
diff changeset
119 end
458
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parents: 457
diff changeset
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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Marco Cirillo <maranda@lightwitch.org>
parents: 724
diff changeset
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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Marco Cirillo <maranda@lightwitch.org>
parents: 724
diff changeset
124 hosts[n].events.remove_handler("s2sin-established", s2s_hook)
f79fda2d7e51 mod_host_guard: host handlers are now cleaned properly on module unload (and also still on re/load to be safe).
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parents: 724
diff changeset
125 hosts[n].events.remove_handler("route/remote", rr_hook)
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parents: 724
diff changeset
126 hosts[n].events.remove_handler("stanza/jabber:server:dialback:result", s2s_hook)
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parents: 724
diff changeset
127 end
f79fda2d7e51 mod_host_guard: host handlers are now cleaned properly on module unload (and also still on re/load to be safe).
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parents: 724
diff changeset
128 end
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parents: 724
diff changeset
129
458
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parents: 457
diff changeset
130 if prosody.start_time then
528
1737c08fde30 mod_host_guard: stick to one code "punctuation" style.
Marco Cirillo <maranda@lightwitch.org>
parents: 519
diff changeset
131 setup()
458
4149fcacbbf1 mod_component_guard: refactored init code, added reloading logic to prevent events pollution with stale dupes.
Marco Cirillo <maranda@lightwitch.org>
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
4149fcacbbf1 mod_component_guard: refactored init code, added reloading logic to prevent events pollution with stale dupes.
Marco Cirillo <maranda@lightwitch.org>
parents: 457
diff changeset
134 end