prosody-modules
f25df3af02c1
mod_isolate_host/mod_isolate_host.lua

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mod_isolate_host/mod_isolate_host.lua @ 5516:f25df3af02c1

mod_client_management: Include client software version number in listing Should you ever wish to revoke a client by version number, e.g. for security reasons affecting certain versions, then it would be good to at the very least see which version is used. Also includes the OAuth2 software ID, an optional unique identifier that should be the same for all installations of a particular software.
author Kim Alvefur <zash@zash.se>
date Sat, 03 Jun 2023 19:21:39 +0200
parent 5297:4bba2d27ffaf
child 5812:25e20fa3824c
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1 local jid = require "util.jid";
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2 local jid_bare, jid_host = jid.bare, jid.host;
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3 local set = require "util.set";
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4 local st = require "util.stanza";
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5
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6 local stanza_types = set.new{"message", "presence", "iq"};
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7 local jid_types = set.new{"bare", "full", "host"};
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8
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9 local except_domains = module:get_option_inherited_set("isolate_except_domains", {});
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10 local except_users = module:get_option_inherited_set("isolate_except_users", {});
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11
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12 if not module.may then
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13 module:depends("compat_roles");
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14 end
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15
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16 function check_stanza(event)
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17 local origin, stanza = event.origin, event.stanza;
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18 if origin.no_host_isolation then return; end
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19 local to_host = jid_host(event.stanza.attr.to);
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20 if to_host and to_host ~= origin.host and not except_domains:contains(to_host) then
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21 if to_host:match("^[^.]+%.(.+)$") == origin.host then -- Permit subdomains
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22 except_domains:add(to_host);
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23 return;
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24 end
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25 if origin.type == "local" then
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26 -- this is code-generated, which means that set_session_isolation_flag has never triggered.
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27 -- we need to check explicitly.
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28 if not is_jid_isolated(jid_bare(event.stanza.attr.from)) then
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29 module:log("debug", "server-generated stanza from %s is allowed, as the jid is not isolated", event.stanza.attr.from);
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30 return;
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31 end
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32 end
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33 module:log("warn", "Forbidding stanza from %s to %s", stanza.attr.from or origin.full_jid, stanza.attr.to);
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34 origin.send(st.error_reply(stanza, "auth", "forbidden", "Communication with "..to_host.." is not available"));
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35 return true;
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36 end
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37 end
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38
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39 for stanza_type in stanza_types do
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40 for jid_type in jid_types do
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41 module:hook("pre-"..stanza_type.."/"..jid_type, check_stanza, 1);
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42 end
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43 end
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44
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45 module:default_permission("prosody:admin", "xmpp:federate");
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46
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47 function is_jid_isolated(bare_jid)
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48 if except_users:contains(bare_jid) or module:may("xmpp:federate", bare_jid) then
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49 return false;
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50 else
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51 return true;
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52 end
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53 end
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54
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55 function set_session_isolation_flag(event)
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56 local session = event.session;
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57 local bare_jid = jid_bare(session.full_jid);
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58 if not is_jid_isolated(bare_jid) then
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59 session.no_host_isolation = true;
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60 end
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61 module:log("debug", "%s is %sisolated", session.full_jid or "[?]", session.no_host_isolation and "" or "not ");
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62 end
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63
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64 module:hook("resource-bind", set_session_isolation_flag);