annotate mod_host_guard/mod_host_guard.lua @ 4730:1da4b815d2fe

mod_cloud_notify: Identify (and immediately push) urgent stanzas, e.g. calls This covers the following things: - A session that appears online, but has a broken TCP connection - Clients such as Siskin and Snikket iOS that require a push for calls to work It allows the stanza to be pushed immediately instead of waiting for the session to hibernate or an ack to timeout. It shouldn't break any existing cases.
author Matthew Wild <mwild1@gmail.com>
date Wed, 27 Oct 2021 19:12:03 +0100
parents 7dbde05b48a9
children
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 hosts = hosts
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7 local incoming_s2s = prosody.incoming_s2s
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8
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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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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
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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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31 return nil
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32 end
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33
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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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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)
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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
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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
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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
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65 hosts[host].events.remove_handler("s2sin-established", s2s_hook)
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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
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93 local function init_hosts(u, i)
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94 for n in pairs(hosts) do
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95 if guard_blockall:contains(n) or guard_protect:contains(n) then
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96 handle_deactivation(n, u, i) ; handle_activation(n, u)
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97 end
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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()
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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", {})
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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
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109 init_hosts(true)
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parents: 457
diff changeset
110 end
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Marco Cirillo <maranda@lightwitch.org>
parents: 457
diff changeset
111
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
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
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
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
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
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()
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
122 module:log ("debug", "removing host handlers as module is being unloaded...")
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
123 for n in pairs(hosts) do
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
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).
Marco Cirillo <maranda@lightwitch.org>
parents: 724
diff changeset
125 hosts[n].events.remove_handler("route/remote", rr_hook)
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
126 hosts[n].events.remove_handler("stanza/jabber:server:dialback:result", s2s_hook)
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
127 end
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
128 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
129
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
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