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Merge pull request #3786 from urbit/jb/ames-peek-forward-lane

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ames: updates forward-lane scry-handling to prevent routing loops
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Joe Bryan 2020-10-26 11:56:23 -07:00 committed by GitHub
commit aa200cf25a
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1 changed files with 23 additions and 11 deletions
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34
pkg/arvo/sys/vane/ames.hoon
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@ -785,23 +785,35 @@
~ ``noun+!>(u.peer)
::
[%forward-lane ~]
:: find lane for u.who, or their galaxy
::
:: this duplicates the routing hack from +send-blob:event-core
:: so long as neither the peer nor the peer's sponsoring galaxy is us:
::
:: - no route to the peer: send to the peer's sponsoring galaxy
:: - direct route to the peer: use that
:: - indirect route to the peer: send to both that route and the
:: the peer's sponsoring galaxy
::
:^ ~ ~ %noun
!> ^- (list lane)
=/ ship-state (~(get by peers.ames-state) u.who)
?. ?=([~ %known *] ship-state)
?. ?& ?=([~ %known *] peer)
!=(our u.who)
==
~
=/ peer-state +.u.ship-state
?. =(~ route.peer-state) ::NOTE avoid tmi
[lane:(need route.peer-state)]~
|- ^- (list lane)
?: ?=(%czar (clan:title sponsor.peer-state))
[%& sponsor.peer-state]~
=/ next (~(get by peers.ames-state) sponsor.peer-state)
=; zar=(trap (list lane))
?~ route.u.peer $:zar
=* rot u.route.u.peer
?:(direct.rot [lane.rot ~] [lane.rot $:zar])
::
|. ^- (list lane)
?: ?=(%czar (clan:title sponsor.u.peer))
?: =(our sponsor.u.peer)
~
[%& sponsor.u.peer]~
=/ next (~(get by peers.ames-state) sponsor.u.peer)
?. ?=([~ %known *] next)
~
$(peer-state +.u.next)
$(peer next)
==
::
[%bones @ ~]