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mix: Multiple features and fixes

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- Implement disco#info against the MIX host
  - Access Control for the #channel-create feature
- Replace "urn:xmpp:mix:core:1" with mix_core_xmlns
- Prevent a user from joining twice
- Return an error when no node could be subscribed during join
- Generate Adhoc Channel JIDs until a unique one was found
This commit is contained in:
PapaTutuWawa 2020-10-29 17:58:11 +01:00
parent 08f0ad4e20
commit 8f26efc94d
1 changed files with 105 additions and 39 deletions
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144
mod_mix/mod_mix.lua
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@ -12,17 +12,23 @@ local time = require("util.time");
local serialization = require("util.serialization");
local pep = module:depends("pep");
-- XML namespaces
local mix_core_xmlns = "urn:xmpp:mix:core:1";
-- Persistent data
local persistent_channels = module:open_store("mix_channels", "keyval");
local persistent_channel_data = module:open_store("mix_data", "keyval");
-- Default values
-- Configuration
local default_channel_description = module:get_option("default_description", "A MIX channel for chatting");
local default_channel_name = module:get_option("default_name", "MIX channel");
local restrict_local_channel_creation = module:get_option("restrict_local_channels", true);
module:depends("disco");
-- module:depends("mam"); TODO: Once message sending works
module:add_identity("conference", "mix", module:get_option("name", "Prosody MIX service");
module:add_feature("http://jabber.org/protocol/disco#info");
module:add_feature("urn:xmpp:mix:core:1");
module:add_feature(mix_core_xmlns);
Participant = {};
Participant.__index = Participant;
@ -52,6 +58,7 @@ function Channel:from(config)
end
function Channel:get_spid(jid)
-- Returns the Stable Participant ID for the *BARE* jid
return self.spid[jid];
end
@ -81,11 +88,15 @@ end
local channels = {};
function get_channel(jid)
-- Return the channel object from the channels array for which the
-- JID matches. If none is found, returns -1, nil
for i, channel in pairs(channels) do
if channel.jid == jid then
return i, channel
return i, channel;
end
end
return -1, nil;
end
function publish_participant(service, spid, participant)
@ -93,7 +104,7 @@ function publish_participant(service, spid, participant)
true,
spid,
st.stanza("item", { id = spid, xmlns = "http://jabber.org/protocol/pubsub" })
:tag("participant", { xmlns = "urn:xmpp:mix:core:1" })
:tag("participant", { xmlns = mix_core_xmlns })
:tag("nick"):text(participant["nick"]):up()
:tag("jid"):text(participant["jid"]));
end
@ -174,7 +185,29 @@ module:hook("iq/bare/http://jabber.org/protocol/disco#items:query", function(eve
return true;
end);
module:hook("iq/bare/http://jabber.org/protocol/disco#info:query", function(event)
module:hook("iq-get/host/http://jabber.org/protocol/disco#info:query", function(event)
module:log("debug", "IQ-GET host disco#info");
local origin, stanza = event.origin, event.stanza;
local reply = st.reply(stanza)
:tag("query", { xmlns = "http://jabber.org/protocol/disco#info" })
-- TODO: Name
:tag("identity", { category = "conference", type = "mix", name = "" }):up()
:tag("feature", { var = "http://jabber.org/protocol/disco#info" }):up()
:tag("feature", { var = mix_core_xmlns }):up();
-- TODO: This should also check for admin and an array
if restrict_channel_creation == "local" then
-- NOTE: Taken from plugins/muc/mod_muc.lua
local host_suffix = host:gsub("^[^%.]+%.", "");
module:log("debug", "Comparing %s (Sender) to %s (Host)", jid.host(stanza.attr.from), host_suffix);
if jid.host(stanza.attr.from) == host_suffix then
reply:tag("feature", { var = mix_core_xmlns.."#create-channel" }):up();
end
end
end);
module:hook("iq-get/bare/http://jabber.org/protocol/disco#info:query", function(event)
module:log("debug", "IQ-GET disco#info");
local origin, stanza = event.origin, event.stanza;
@ -187,13 +220,15 @@ module:hook("iq/bare/http://jabber.org/protocol/disco#info:query", function(even
reply:tag("feature", { var = "http://jabber.org/protocol/disco#info" }):up();
reply:tag("identity", { category = "conference", name = channel.name, type = "mix" }):up();
reply:tag("feature", { var = "urn:xmpp:mix:core:1" }):up();
-- TODO: Check permissions
reply:tag("feature", { var = "urn:xmpp:mix:core:1#create-channel" }):up();
reply:tag("feature", { var = mix_core_xmlns }):up();
-- TODO: Once message sending works, uncomment this
-- reply:tag("feature", { var = "urn:xmpp:mam:2" }):up();
origin.send(reply);
return true;
end);
-- TODO: Make this a function of Channel:
function find_participant(table, jid)
for i, v in pairs(table) do
if v.jid == jid then
@ -204,7 +239,7 @@ function find_participant(table, jid)
return -1;
end
module:hook("iq-set/bare/urn:xmpp:mix:core:1:leave", function(event)
module:hook("iq-set/bare/"..mix_core_xmlns..":leave", function(event)
module:log("debug", "MIX leave received");
local origin, stanza = event.origin, event.stanza;
local from = jid.bare(stanza.attr.from);
@ -233,51 +268,72 @@ module:hook("iq-set/bare/urn:xmpp:mix:core:1:leave", function(event)
module:log("debug", "Unsubscribed %s from %s on %s", from, node, channel.jid);
end
channels[i].subscriptions[from] = nil;
-- Retracting the participation
srv:retract("urn:xmpp:mix:nodes:participants", true, channel.spid[from], true);
-- Retracting the participatio)
srv:retract("urn:xmpp:mix:nodes:participants", true, channel:get_spid(from), true);
-- Removing the user
table.remove(channels[i].participants, participant_index);
channel:save_state();
origin.send(st.reply(stanza):tag("leave", { xmlns = "urn:xmpp:mix:core:1" }));
origin.send(st.reply(stanza):tag("leave", { xmlns = mix_core_xmlns }));
return true;
end);
module:hook("iq-set/bare/urn:xmpp:mix:core:1:join", function(event)
module:hook("iq-set/bare/"..mix_core_xmlns..":join", function(event)
module:log("debug", "MIX join received");
local origin, stanza = event.origin, event.stanza;
local from = jid.bare(stanza.attr.from);
local i, channel = get_channel(stanza.attr.to);
if not channel then
origin.send(channel_not_found(stanza));
return;
end
local from = jid.bare(stanza.attr.from);
local spid = channel.spid[from] or uuid.generate(); -- Stable Participant ID
-- Prevent the user from joining multiple times
local participant_index = find_participant(channel.participants, from);
if participant_index ~= -1 then
origin.send(st.error_reply(stanza, "cancel", "bad-request", "User already joined"));
return;
end
local spid = channel:get_spid(from) or uuid.generate(); -- Stable Participant ID
local reply = st.reply(stanza)
:tag("join", { xmlns = "urn:xmpp:mix:core:1", id = spid });
:tag("join", { xmlns = mix_core_xmlns, id = spid });
local srv = pep.get_pep_service(jid.node(stanza.attr.to));
local join = stanza:get_child("join", "urn:xmpp:mix:core:1");
local join = stanza:get_child("join", mix_core_xmlns);
local nick = join:get_child("nick");
module:log("debug", "User joining as nick %s", nick:get_text());
local nodes = {};
-- TODO: The spec says that an error sould be returned when no nodes can be subscribed to
local has_subscribed_once = false;
local first_error = nil;
for subscribe in join:childtags("subscribe") do
module:log("debug", "Subscribing user to node %s", subscribe.attr.node);
local ok, err = srv:add_subscription(subscribe.attr.node, true, from);
if not ok then
module:log("debug", "Error during subscription: %s", err);
-- MIX-CORE says that the first error should be returned when
-- no of the requested nodes could be subscribed to
if first_error ~= nil then
first_error = err;
end
else
table.insert(nodes, subscribe.attr.node);
reply:tag("subscribe", { node = subscribe.attr.node }):up();
has_subscribed_once = true;
end
end
channels[i].subscriptions[from] = nodes;
if not has_subscribed_once then
origin.send(st.error_reply(stanza, "cancel", first_error));
return;
end
local participant = Participant:new(jid.bare(from), nick:get_text())
channels[i].subscriptions[from] = nodes;
table.insert(channels[i].participants, participant)
channels[i].spid[jid.bare(stanza.attr.from)] = spid;
channels[i]:get_spid(jid.bare(stanza.attr.from)) = spid;
publish_participant(srv, spid, participant);
channels[i]:save_state();
@ -286,7 +342,7 @@ module:hook("iq-set/bare/urn:xmpp:mix:core:1:join", function(event)
return true
end);
module:hook("iq-set/bare/urn:xmpp:mix:core:1:setnick", function(event)
module:hook("iq-set/bare/"..mix_core_xmlns..":setnick", function(event)
module:log("debug", "MIX setnick received");
local origin, stanza = event.origin, event.stanza;
local from = jid.bare(stanza.attr.from);
@ -302,21 +358,25 @@ module:hook("iq-set/bare/urn:xmpp:mix:core:1:setnick", function(event)
module:log("debug", "%s is not a participant in %s", from, channel.jid);
return;
end
local setnick = stanza:get_child("setnick", "urn:xmpp:mix:core:1");
-- TODO: Error handling
local nick = setnick:get_child("nick"):get_text();
-- NOTE: Prosody should guarantee us that the setnick stanza exists
local setnick = stanza:get_child("setnick", mix_core_xmlns);
local nick = setnick:get_child("nick");
if nick_stanza == nil then
origin.send(st.error_reply(stanza, "cancel", "bad-request", "Missing <nick>"));
return;
end
-- Change the nick
channels[i].participants[participant_index].nick = nick;
channels[i].participants[participant_index].nick = nick:get_text();
-- Inform all other members
local srv = pep.get_pep_service(channel.jid);
local participant = channel.participants[participant_index];
publish_participant(srv, channel:get_spid(participant.jid), participant);
origin.send(st.reply(stanza)
:tag("setnick", { xmlns = "urn:xmpp:mix:core:1" })
:tag("nick"):text(nick));
:tag("setnick", { xmlns = mix_core_xmlns })
:tag("nick"):text(nick:get_text()));
channel:save_state();
return true;
end);
@ -326,7 +386,7 @@ function Channel:publish_info(srv)
st.stanza("item", { id = timestamp, xmlns = "http://jabber.org/protocol/pubsub" })
:tag("x", { xmlns = "jabber:x:data", type = "result" })
:tag("field", { var = "FORM_TYPE", type = "hidden" })
:tag("value"):text("urn:xmpp:mix:core:1"):up():up()
:tag("value"):text(mix_core_xmlns):up():up()
:tag("field", { var = "Name" })
:tag("value"):text(self.name):up()
:tag("field", { var = "Contact" })
@ -352,12 +412,12 @@ function create_channel(node, creator, adhoc)
table.insert(channels, channel);
end
module:hook("iq-set/host/urn:xmpp:mix:core:1:create", function(event)
module:hook("iq-set/host/"..mix_core_xmlns..":create", function(event)
module:log("debug", "MIX create received");
local origin, stanza = event.origin, event.stanza;
local from = jid.bare(stanza.attr.from);
local create = stanza:get_child("create", "urn:xmpp:mix:core:1");
local create = stanza:get_child("create", mix_core_xmlns);
local node;
if create.attr.channel ~= nil then
-- Create non-adhoc channel
@ -374,24 +434,30 @@ module:hook("iq-set/host/urn:xmpp:mix:core:1:create", function(event)
create_channel(create.attr.channel, from, false);
else
-- Create adhoc channel
-- TODO: Check for a collision
node = id.short();
while (true) do
node = id.short();
local _, channel = get_channel(string.format("%s@%s", node, host));
if channel == nil then
break;
end
end
create_channel(node, from, true);
end
module:log("debug", "Channel %s created with %s as owner", node, from);
origin.send(st.reply(stanza)
:tag("create", { xmlns = "urn:xmpp:mix:core:1", channel = node }));
:tag("create", { xmlns = mix_core_xmlns, channel = node }));
save_channels();
return true;
end);
module:hook("iq-set/host/urn:xmpp:mix:core:1:destroy", function(event)
module:hook("iq-set/host/"..mix_core_xmlns..":destroy", function(event)
module:log("debug", "MIX destroy received");
local origin, stanza = event.origin, event.stanza;
local from = jid.bare(stanza.attr.from);
local destroy = stanza:get_child("create", "urn:xmpp:mix:core:1");
local destroy = stanza:get_child("create", mix_core_xmlns);
local node = destory.attr.channel;
local node_jid = string.format("%s@%s", node, host);
local i, channel = get_channel(node_jid);
@ -440,10 +506,10 @@ module:hook("message/bare", function(event)
local participant = channel.participants[participant_index];
local msg = st.clone(stanza);
msg:add_child(st.stanza("mix", { xmlns = "urn:xmpp:mix:core:1" })
msg:add_child(st.stanza("mix", { xmlns = mix_core_xmlns })
:tag("nick"):text(participant.nick):up()
:tag("jid"):text(participant.jid):up());
msg.attr.from = channel.jid.."/"..channel.spid[from];
msg.attr.from = channel.jid.."/"..channel:get_spid(from);
for _, p in pairs(channel.participants) do
if p.jid ~= participant.jid then
msg.attr.to = p.jid;