mirror of
https://github.com/matrix-construct/construct
synced 2024-08-27 03:45:16 +02:00
248 lines
5.8 KiB
C++
248 lines
5.8 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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using namespace ircd;
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static void
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check_event(const m::resource::request &request,
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const m::event &event);
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static m::resource::response
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put__invite(client &client,
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const m::resource::request &request);
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mapi::header
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IRCD_MODULE
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{
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"Federation 10 :Inviting to a room"
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};
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const string_view
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invite_description
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{R"(
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When a user wishes to invite an other user to a local room and the other
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user is on a different server, the inviting server will send a request to
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the invited server.
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)"};
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m::resource
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invite_resource
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{
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"/_matrix/federation/v1/invite/",
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{
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invite_description,
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resource::DIRECTORY
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}
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};
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m::resource::method
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method_put
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{
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invite_resource, "PUT", put__invite,
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{
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method_put.VERIFY_ORIGIN
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}
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};
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conf::item<milliseconds>
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IRCD_MODULE_EXPORT_DATA
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stream_cross_sleeptime
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{
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{ "name", "ircd.federation.invite.stream_cross_sleeptime" },
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{ "default", 5000L },
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};
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m::resource::response
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put__invite(client &client,
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const m::resource::request &request)
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{
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if(request.parv.size() < 1)
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throw m::NEED_MORE_PARAMS
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{
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"room_id path parameter required"
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};
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m::room::id::buf room_id
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{
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url::decode(room_id, request.parv[0])
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};
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if(request.parv.size() < 2)
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throw m::NEED_MORE_PARAMS
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{
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"event_id path parameter required"
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};
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m::event::id::buf event_id
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{
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url::decode(event_id, request.parv[1])
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};
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const m::event event
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{
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request
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};
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if(at<"event_id"_>(event) != event_id)
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throw m::error
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{
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http::NOT_MODIFIED, "M_MISMATCH_EVENT_ID",
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"ID of event in request body does not match the path parameter."
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};
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if(at<"room_id"_>(event) != room_id)
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throw m::error
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{
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http::NOT_MODIFIED, "M_MISMATCH_ROOM_ID",
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"ID of room in request body does not match the path parameter."
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};
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if(m::room::server_acl::enable_write && !m::room::server_acl::check(room_id, request.node_id))
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throw m::ACCESS_DENIED
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{
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"You are not permitted by the room's server access control list."
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};
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check_event(request, event);
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const m::user::id target
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{
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at<"state_key"_>(event)
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};
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thread_local char sigs[4_KiB];
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const m::event signed_event
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{
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signatures(sigs, event, target.host())
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};
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const json::strung revent
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{
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signed_event
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};
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const json::value array[2]
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{
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json::value{200L}, json::members
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{
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{ "event", revent }
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}
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};
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// Send back the signed event first before eval. If we eval the signed
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// event first: the effects will occur before the inviting server has
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// the signed event returned from us; they might not consider the user
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// invited yet, causing trouble for the eval effects. That may actually
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// still happen due to the two separate TCP connections being uncoordinated
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// (one for this request, and another when m::eval effects connect to them
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// and make any requests). But either way if this call fails then we will
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// lose the invite but that may not be such a bad thing.
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m::resource::response response
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{
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client, json::value
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{
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array, 2
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}
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};
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// Synapse needs time to process our response otherwise our eval below may
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// complete before this response arrives for them and is processed.
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ctx::sleep(milliseconds(stream_cross_sleeptime));
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// Eval the dual-signed invite event. This will write it locally. This will
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// also try to sync the room as best as possible. The invitee will then be
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// presented with this invite request in their rooms list.
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m::vm::opts vmopts;
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vmopts.node_id = request.node_id;
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// Synapse may 403 a fetch of the prev_event of the invite event.
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vmopts.phase.set(m::vm::phase::FETCH_PREV, false);
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// We don't want this eval throwing an exception because the response has
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// already been made for this request.
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const unwind_nominal_assertion na;
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vmopts.nothrows = -1;
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m::vm::eval
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{
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signed_event, vmopts
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};
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// The remote maybe gave us some events they purport to be the room's
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// state. If so, we can try to evaluate them to give our client more info.
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const json::array &invite_room_state
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{
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json::object(request["unsigned"]).get("invite_room_state")
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};
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if(!empty(invite_room_state))
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{
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m::vm::eval
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{
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invite_room_state, vmopts
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};
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};
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// note: returning a resource response is a symbolic/indicator action to
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// the caller and has no real effect at the point of return.
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return response;
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}
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void
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check_event(const m::resource::request &request,
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const m::event &event)
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{
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if(at<"type"_>(event) != "m.room.member")
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throw m::error
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{
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http::NOT_MODIFIED, "M_INVALID_TYPE",
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"event.type must be m.room.member"
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};
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if(unquote(at<"content"_>(event).at("membership")) != "invite")
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throw m::error
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{
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http::NOT_MODIFIED, "M_INVALID_CONTENT_MEMBERSHIP",
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"event.content.membership must be invite."
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};
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if(at<"origin"_>(event) != request.node_id)
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throw m::error
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{
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http::FORBIDDEN, "M_INVALID_ORIGIN",
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"event.origin must be you."
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};
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if(!my_host(m::user::id(at<"state_key"_>(event)).host()))
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throw m::error
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{
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http::FORBIDDEN, "M_INVALID_STATE_KEY",
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"event.state_key must be my user."
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};
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m::event::conforms non_conforms;
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const m::event::conforms report
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{
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event, non_conforms.report
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};
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if(!report.clean())
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throw m::error
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{
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http::NOT_MODIFIED, "M_INVALID_EVENT",
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"Proffered event has the following problems: %s",
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string(report)
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};
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if(!verify(event, request.node_id))
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throw m::ACCESS_DENIED
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{
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"Invite event fails verification for %s", request.node_id
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};
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}
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