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Fix using the remote provided event from /send_join (#2490)

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Neil Alexander 2022-05-25 14:31:07 +01:00 • committed by GitHub
parent 9ce3898d03
commit ac4d0072cf
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4 changed files with 12 additions and 8 deletions
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12
federationapi/internal/perform.go
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@ -213,10 +213,14 @@ func (r *FederationInternalAPI) performJoinUsingServer(
// If the remote server returned an event in the "event" key of
// the send_join request then we should use that instead. It may
// contain signatures that we don't know about.
if respSendJoin.Event != nil && isWellFormedMembershipEvent(
respSendJoin.Event, roomID, userID, r.cfg.Matrix.ServerName,
) {
event = respSendJoin.Event
if len(respSendJoin.Event) > 0 {
var remoteEvent *gomatrixserverlib.Event
remoteEvent, err = respSendJoin.Event.UntrustedEvent(respMakeJoin.RoomVersion)
if err == nil && isWellFormedMembershipEvent(
remoteEvent, roomID, userID, r.cfg.Matrix.ServerName,
) {
event = remoteEvent
}
}
// Sanity-check the join response to ensure that it has a create