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98a5ab9035
shrub/pkg/arvo/sys/vane/ames.hoon
yosoyubik 98a5ab9035 ames: fix handling of fine tasks for aliens
2023-04-08 06:34:10 +02:00

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:: Ames extends Arvo's %pass/%give move semantics across the network.
::
:: Ames receives packets as Arvo events and emits packets as Arvo
:: effects. The runtime is responsible for transferring the bytes in
:: an Ames packet across a physical network to another ship.
::
:: The runtime tells Ames which physical address a packet came from,
:: represented as an opaque atom. Ames can emit a packet effect to
:: one of those opaque atoms or to the Urbit address of a galaxy
:: (root node), which the runtime is responsible for translating to a
:: physical address. One runtime implementation sends UDP packets
:: using IPv4 addresses for ships and DNS lookups for galaxies, but
:: other implementations may overlay over other kinds of networks.
::
:: A local vane can pass Ames a %plea request message. Ames
:: transmits the message over the wire to the peer ship's Ames, which
:: passes the message to the destination vane.
::
:: Once the peer has processed the %plea message, it sends a
:: message-acknowledgment packet over the wire back to the local
:: Ames. This ack can either be positive to indicate the request was
:: processed, or negative to indicate the request failed, in which
:: case it's called a "nack". (Don't confuse Ames nacks with TCP
:: nacks, which are a different concept).
::
:: When the local Ames receives either a positive message-ack or a
:: combination of a nack and naxplanation (explained in more detail
:: below), it gives an %done move to the local vane that had
:: requested the original %plea message be sent.
::
:: A local vane can give Ames zero or more %boon response messages in
:: response to a %plea, on the same duct that Ames used to pass the
:: %plea to the vane. Ames transmits a %boon over the wire to the
:: peer's Ames, which gives it to the destination vane on the same
:: duct the vane had used to pass the original %plea to Ames.
::
:: %boon messages are acked automatically by the receiver Ames. They
:: cannot be nacked, and Ames only uses the ack internally, without
:: notifying the client vane that gave Ames the %boon.
::
:: If the Arvo event that completed receipt of a %boon message
:: crashes, Ames instead sends the client vane a %lost message
:: indicating the %boon was missed.
::
:: %plea messages can be nacked, in which case the peer will send
:: both a message-nack packet and a naxplanation message, which is
:: sent in a way that does not interfere with normal operation. The
:: naxplanation is sent as a full Ames message, instead of just a
:: packet, because the contained error information can be arbitrarily
:: large. A naxplanation can only give rise to a positive ack --
:: never ack an ack, and never nack a naxplanation.
::
:: Ames guarantees a total ordering of messages within a "flow",
:: identified in other vanes by a duct and over the wire by a "bone":
:: an opaque number. Each flow has a FIFO queue of %plea requests
:: from the requesting ship to the responding ship and a FIFO queue
:: of %boon's in the other direction.
::
:: Message order across flows is not specified and may vary based on
:: network conditions.
::
:: Ames guarantees that a message will only be delivered once to the
:: destination vane.
::
:: Ames encrypts every message using symmetric-key encryption by
:: performing an elliptic curve Diffie-Hellman using our private key
:: and the public key of the peer. For ships in the Jael PKI
:: (public-key infrastructure), Ames looks up the peer's public key
:: from Jael. Comets (128-bit ephemeral addresses) are not
:: cryptographic assets and must self-attest over Ames by sending a
:: single self-signed packet containing their public key.
::
:: When a peer suffers a continuity breach, Ames removes all
:: messaging state related to it. Ames does not guarantee that all
:: messages will be fully delivered to the now-stale peer. From
:: Ames's perspective, the newly restarted peer is a new ship.
:: Ames's guarantees are not maintained across a breach.
::
:: A vane can pass Ames a %heed $task to request Ames track a peer's
:: responsiveness. If our %boon's to it start backing up locally,
:: Ames will give a %clog back to the requesting vane containing the
:: unresponsive peer's urbit address. This interaction does not use
:: ducts as unique keys. Stop tracking a peer by sending Ames a
:: %jilt $task.
::
:: Debug output can be adjusted using %sift and %spew $task's.
::
::TODO fine
:: - receiving packets:
:: +on-hear (1st) -> +on-hear-packet -> %fine
:: - sending packets:
:: +on-plea
:: -> +make-peer-core (make a function kind of like +on-memo)
:: -> call +on-pump-send kind of like how +run-message-pump does
:: (assuming as event, scry just stateless)
::
!:
=, ames
=* point point:jael
=* public-keys-result public-keys-result:jael
:: veb: verbosity flags
::
=/ veb-all-off
:* snd=`?`%.n :: sending packets
rcv=`?`%.n :: receiving packets
odd=`?`%.n :: unusual events
msg=`?`%.n :: message-level events
ges=`?`%.n :: congestion control
for=`?`%.n :: packet forwarding
rot=`?`%.n :: routing attempts
kay=`?`%.n :: is ok/not responding
fin=`?`%.n :: remote-scry
==
=/ packet-size 13
=>
~% %ames ..part ~
|%
+| %helpers
:: +trace: print if .verb is set and we're tracking .ship
::
++ trace
|= [mode=?(%ames %fine) verb=? =ship ships=(set ship) print=(trap tape)]
^+ same
?. verb
same
?. => [ship=ship ships=ships in=in]
~+ |(=(~ ships) (~(has in ships) ship))
same
(slog leaf/"{(trip mode)}: {(scow %p ship)}: {(print)}" ~)
:: +qos-update-text: notice text for if connection state changes
::
++ qos-update-text
|= [=ship mode=?(%ames %fine) old=qos new=qos k=? ships=(set ship)]
^- (unit tape)
::
=+ trace=(cury trace mode)
?+ [-.old -.new] ~
[%unborn %live] `"; {(scow %p ship)} is your neighbor"
[%dead %live] ((trace k ship ships |.("is ok")) ~)
[%live %dead] ((trace k ship ships |.("not responding still trying")) ~)
[%unborn %dead] ((trace k ship ships |.("not responding still trying")) ~)
[%live %unborn] `"; {(scow %p ship)} has sunk"
[%dead %unborn] `"; {(scow %p ship)} has sunk"
==
:: +lte-packets: yes if a is before b
::
++ lte-packets
|= [a=live-packet-key b=live-packet-key]
^- ?
::
?: (lth message-num.a message-num.b)
%.y
?: (gth message-num.a message-num.b)
%.n
(lte fragment-num.a fragment-num.b)
:: +split-message: split message into kilobyte-sized fragments
::
:: We don't literally split it here since that would allocate many
:: large atoms with no structural sharing. Instead, each
:: static-fragment has the entire message and a counter. In
:: +encrypt, we interpret this to get the actual fragment.
::
++ split-message
~/ %split-message
|= [=message-num =message-blob]
^- (list static-fragment)
::
=/ num-fragments=fragment-num (met packet-size message-blob)
=| counter=@
::
|- ^- (list static-fragment)
?: (gte counter num-fragments)
~
::
:- [message-num num-fragments counter `@`message-blob]
$(counter +(counter))
:: +assemble-fragments: concatenate fragments into a $message
::
++ assemble-fragments
~/ %assemble-fragments
|= [num-fragments=fragment-num fragments=(map fragment-num fragment)]
^- *
::
=| sorted=(list fragment)
=. sorted
=/ index=fragment-num 0
|- ^+ sorted
?: =(index num-fragments)
sorted
$(index +(index), sorted [(~(got by fragments) index) sorted])
::
(cue (rep packet-size (flop sorted)))
:: +jim: caching +jam
::
++ jim |=(n=* ~+((jam n)))
++ spit
|= =path
^- [pat=@t wid=@ud]
=+ pat=(spat path)
=+ wid=(met 3 pat)
?> (lte wid 384)
[pat wid]
::
:: +bind-duct: find or make new $bone for .duct in .ossuary
::
++ bind-duct
|= [=ossuary =duct]
^+ [next-bone.ossuary ossuary]
::
?^ existing=(~(get by by-duct.ossuary) duct)
[u.existing ossuary]
::
:- next-bone.ossuary
:+ (add 4 next-bone.ossuary)
(~(put by by-duct.ossuary) duct next-bone.ossuary)
(~(put by by-bone.ossuary) next-bone.ossuary duct)
:: +make-bone-wire: encode ship, rift and bone in wire for sending to vane
::
++ make-bone-wire
|= [her=ship =rift =bone]
^- wire
::
/bone/(scot %p her)/(scot %ud rift)/(scot %ud bone)
:: +parse-bone-wire: decode ship, bone and rift from wire from local vane
::
++ parse-bone-wire
|= =wire
^- %- unit
$% [%old her=ship =bone]
[%new her=ship =rift =bone]
==
?. ?| ?=([%bone @ @ @ ~] wire)
?=([%bone @ @ ~] wire)
==
:: ignore malformed wires
::
~
?+ wire ~
[%bone @ @ ~]
`[%old `@p`(slav %p i.t.wire) `@ud`(slav %ud i.t.t.wire)]
::
[%bone @ @ @ ~]
%- some
:^ %new
`@p`(slav %p i.t.wire)
`@ud`(slav %ud i.t.t.wire)
`@ud`(slav %ud i.t.t.t.wire)
==
:: +make-pump-timer-wire: construct wire for |packet-pump timer
::
++ make-pump-timer-wire
|= [her=ship =bone]
^- wire
/pump/(scot %p her)/(scot %ud bone)
:: +parse-pump-wire: parse .her and .bone from |packet-pump wire
::
++ parse-pump-wire
|= [ship=@ bone=@]
^- (unit [%pump her=^ship =^bone])
?~ ship=`(unit @p)`(slaw %p ship)
~
?~ bone=`(unit @ud)`(slaw %ud bone)
~
`pump/[u.ship u.bone]
::
++ parse-fine-wire
|= [ship=@ =wire]
^- (unit [%fine her=^ship =^wire])
?~ ship=`(unit @p)`(slaw %p ship)
~
`fine/[u.ship wire]
:: +derive-symmetric-key: $symmetric-key from $private-key and $public-key
::
:: Assumes keys have a tag on them like the result of the |ex:crub core.
::
++ derive-symmetric-key
~/ %derive-symmetric-key
|= [=public-key =private-key]
^- symmetric-key
::
?> =('b' (end 3 public-key))
=. public-key (rsh 8 (rsh 3 public-key))
::
?> =('B' (end 3 private-key))
=. private-key (rsh 8 (rsh 3 private-key))
::
`@`(shar:ed:crypto public-key private-key)
:: +encode-keys-packet: create key request $packet
::
++ encode-keys-packet
~/ %encode-keys-packet
|= [sndr=ship rcvr=ship sndr-life=life]
^- shot
:* [sndr rcvr]
&
&
(mod sndr-life 16)
`@`1
origin=~
content=`@`%keys
==
::
++ response-size 13 :: 1kb
:: +sift-roar: assemble scry response fragments into full message
::
++ sift-roar
|= [total=@ud hav=(list have)]
^- roar
=/ mes=@
%+ rep response-size
%+ turn (flop hav)
|= =have
dat.have
=+ sig=(end 9 mes)
:- sig
=+ dat=(rsh 9 mes)
?~ dat ~
~| [%fine %response-not-cask]
;;((cask) (cue dat))
:: +welt: like +weld but first argument is reversed
:: TODO: move to hoon.hoon
++ welt
~/ %welt
|* [a=(list) b=(list)]
=> .(a ^.(homo a), b ^.(homo b))
|- ^+ b
?~ a b
$(a t.a, b [i.a b])
:: +etch-hunk: helper core to serialize a $hunk
::
++ etch-hunk
|= [=ship =life =acru:ames]
|%
::
+| %helpers
:: +show-meow: prepare $meow for printing
::
++ show-meow
|= =meow
:* sig=`@q`(mug sig.meow)
num=num.meow
siz=siz.meow
dat=`@q`(mug dat.meow)
==
::
++ make-meow
|= [=path mes=@ num=@ud]
^- meow
=/ tot (met 13 mes)
=/ dat (cut 13 [(dec num) 1] mes)
=/ wid (met 3 dat)
:* sig=(sign-fra path num dat) :: fragment signature
num=tot :: number of fragments
siz=?:(=(num tot) (met 3 dat) 1.024) :: fragment byte width
dat=dat :: response data fragment
==
::
++ etch-meow
|= =meow
^- @uxmeow
%+ can 3
:~ 64^sig.meow
4^num.meow
2^siz.meow
(met 3 dat.meow)^dat.meow
==
+| %keys
::
++ sign sigh:as:acru
++ sign-fra
|= [=path fra=@ud dat=@ux]
::~> %bout.[1 %sign-fra]
(sign (jam path fra dat))
::
++ full
|= [=path data=$@(~ (cask))]
=/ buf (jam ship life path data)
::=/ nam (crip "sign-full {<(met 3 buf)>}")
::~> %bout.[1 nam]
(sign buf)
::
+| %serialization
::
++ etch
|= [=path =hunk data=$@(~ (cask))]
^- (list @uxmeow)
=/ mes=@
=/ sig=@ (full path data)
?~ data sig
(mix sig (lsh 9 (jam data)))
::(cat 9 sig (jam data))
::
=/ las (met 13 mes)
=/ tip (dec (add [lop len]:hunk))
=/ top (min las tip)
=/ num lop.hunk
?> (lte num top)
=| res=(list @uxmeow)
|- ^+ res
?: =(num top)
=- (flop - res)
(etch-meow (make-meow path mes num))
$(num +(num), res :_(res (etch-meow (make-meow path mes num))))
--
:: +etch-open-packet: convert $open-packet attestation to $shot
::
++ etch-open-packet
~/ %etch-open-packet
|= [pac=open-packet =acru:ames]
^- shot
:* [sndr rcvr]:pac
req=& sam=&
(mod sndr-life.pac 16)
(mod rcvr-life.pac 16)
origin=~
content=`@`(sign:as:acru (jam pac))
==
:: +sift-open-packet: decode comet attestation into an $open-packet
::
++ sift-open-packet
~/ %sift-open-packet
|= [=shot our=ship our-life=@]
^- open-packet
:: deserialize and type-check packet contents
::
=+ ;; [signature=@ signed=@] (cue content.shot)
=+ ;; =open-packet (cue signed)
:: assert .our and .her and lives match
::
?> .= sndr.open-packet sndr.shot
?> .= rcvr.open-packet our
?> .= sndr-life.open-packet 1
?> .= rcvr-life.open-packet our-life
:: only a star can sponsor a comet
::
?> =(%king (clan:title (^sein:title sndr.shot)))
=/ crub (com:nu:crub:crypto public-key.open-packet)
:: comet public-key must hash to its @p address
::
?> =(sndr.shot fig:ex:crub)
:: verify signature
::
?> (safe:as:crub signature signed)
open-packet
:: +etch-shut-packet: encrypt and packetize a $shut-packet
::
++ etch-shut-packet
~/ %etch-shut-packet
:: TODO add rift to signed messages to prevent replay attacks?
::
|= $: =shut-packet
=symmetric-key
sndr=ship
rcvr=ship
sndr-life=@
rcvr-life=@
==
^- shot
::
=? meat.shut-packet
?& ?=(%& -.meat.shut-packet)
(gth (met packet-size fragment.p.meat.shut-packet) 1)
==
%_ meat.shut-packet
fragment.p
(cut packet-size [[fragment-num 1] fragment]:p.meat.shut-packet)
==
::
=/ vec ~[sndr rcvr sndr-life rcvr-life]
=/ [siv=@uxH len=@ cyf=@ux]
(~(en sivc:aes:crypto (shaz symmetric-key) vec) (jam shut-packet))
::
:* ^= dyad [sndr rcvr]
^= req ?=(%& -.meat.shut-packet)
^= sam &
^= sndr-tick (mod sndr-life 16)
^= sndr-tick (mod rcvr-life 16)
^= origin ~
^= content :(mix siv (lsh 7 len) (lsh [3 18] cyf))
==
:: +sift-shut-packet: decrypt a $shut-packet from a $shot
::
++ sift-shut-packet
~/ %sift-shut-packet
|= [=shot =symmetric-key sndr-life=@ rcvr-life=@]
^- shut-packet
?. =(sndr-tick.shot (mod sndr-life 16))
~| ames-sndr-tick+sndr-tick.shot !!
?. =(rcvr-tick.shot (mod rcvr-life 16))
~| ames-rcvr-tick+rcvr-tick.shot !!
=/ siv (end 7 content.shot)
=/ len (end 4 (rsh 7 content.shot))
=/ cyf (rsh [3 18] content.shot)
~| ames-decrypt+[[sndr rcvr origin]:shot len siv]
=/ vec ~[sndr.shot rcvr.shot sndr-life rcvr-life]
;; shut-packet %- cue %- need
(~(de sivc:aes:crypto (shaz symmetric-key) vec) siv len cyf)
:: ordered map for tracking remote scry requests
::
++ orm ((on @ud keen-state) lte)
::
++ is-peer-dead
|= [now=@da =peer-state]
^+ peer-state
=/ expiry=@da (add ~s30 last-contact.qos.peer-state)
=? -.qos.peer-state (gte now expiry)
%dead
peer-state
::
++ update-peer-route
|= [peer=ship =peer-state]
^+ peer-state
:: If the peer is not responding, mark the .lane.route as
:: indirect. The next packets we emit will be sent to the
:: receiver's sponsorship chain in case the receiver's
:: transport address has changed and this lane is no longer
:: valid.
::
:: If .peer is a galaxy, the lane will always remain direct.
::
?. ?& ?=(%dead -.qos.peer-state)
?=(^ route.peer-state)
direct.u.route.peer-state
!=(%czar (clan:title peer))
==
peer-state
peer-state(direct.u.route %.n)
::
+| %atomics
::
+$ private-key @uwprivatekey
+$ signature @uwsignature
+$ byuts [wid=@ud dat=@ux]
::
+| %kinetics
:: $channel: combined sender and receiver identifying data
::
+$ channel
$: [our=ship her=ship]
now=@da
:: our data, common to all dyads
::
$: =our=life
crypto-core=acru:ames
=bug
==
:: her data, specific to this dyad
::
$: =symmetric-key
=her=life
=her=rift
=her=public-key
her-sponsor=ship
== ==
:: $open-packet: unencrypted packet payload, for comet self-attestation
::
:: This data structure gets signed and jammed to form the .contents
:: field of a $packet.
::
:: TODO add rift to prevent replay attacks
::
+$ open-packet
$: =public-key
sndr=ship
=sndr=life
rcvr=ship
=rcvr=life
==
:: $shut-packet: encrypted packet payload
::
+$ shut-packet
$: =bone
=message-num
meat=(each fragment-meat ack-meat)
==
:: $fragment-meat: contents of a message-fragment packet
::
+$ fragment-meat
$: num-fragments=fragment-num
=fragment-num
=fragment
==
:: $ack-meat: contents of an acknowledgment packet; fragment or message
::
:: Fragment acks reference the $fragment-num of the target packet.
::
:: Message acks contain a success flag .ok, which is %.n in case of
:: negative acknowledgment (nack), along with .lag that describes the
:: time it took to process the message. .lag is zero if the message
:: was processed during a single Arvo event. At the moment, .lag is
:: always zero.
::
+$ ack-meat (each fragment-num [ok=? lag=@dr])
:: $naxplanation: nack trace; explains which message failed and why
::
+$ naxplanation [=message-num =error]
::
+| %statics
::
:: $ames-state: state for entire vane
::
:: peers: states of connections to other ships
:: unix-duct: handle to give moves to unix
:: life: our $life; how many times we've rekeyed
:: crypto-core: interface for encryption and signing
:: bug: debug printing configuration
:: snub: blocklist for incoming packets
:: cong: parameters for marking a flow as clogged
::
+$ ames-state
$: peers=(map ship ship-state)
=unix=duct
=life
=rift
crypto-core=acru:ames
=bug
snub=[form=?(%allow %deny) ships=(set ship)]
cong=[msg=@ud mem=@ud]
==
::
+$ azimuth-state [=symmetric-key =life =rift =public-key sponsor=ship]
+$ ames-state-4 ames-state-5
+$ ames-state-5
$: peers=(map ship ship-state-5)
=unix=duct
=life
crypto-core=acru-12
bug=bug-9
==
::
+$ ship-state-4 ship-state-5
+$ ship-state-5
$% [%alien alien-agenda-12]
[%known peer-state-5]
==
::
+$ peer-state-5
$: azimuth-state
route=(unit [direct=? =lane])
=qos
=ossuary
snd=(map bone message-pump-state)
rcv=(map bone message-sink-state)
nax=(set [=bone =message-num])
heeds=(set duct)
==
::
+$ bug-9
$: veb=_[`?`%.n `?`%.n `?`%.n `?`%.n `?`%.n `?`%.n `?`%.n]
ships=(set ship)
==
::
+$ ames-state-6
$: peers=(map ship ship-state-6)
=unix=duct
=life
crypto-core=acru-12
bug=bug-9
==
::
+$ ship-state-6
$% [%alien alien-agenda-12]
[%known peer-state-6]
==
::
+$ peer-state-6
$: azimuth-state
route=(unit [direct=? =lane])
=qos
=ossuary
snd=(map bone message-pump-state)
rcv=(map bone message-sink-state)
nax=(set [=bone =message-num])
heeds=(set duct)
==
::
+$ ames-state-7
$: peers=(map ship ship-state-7)
=unix=duct
=life
crypto-core=acru-12
bug=bug-9
==
::
+$ ames-state-8
$: peers=(map ship ship-state-7)
=unix=duct
=life
crypto-core=acru-12
bug=bug-9
corks=(set wire)
==
::
+$ ames-state-9
$: peers=(map ship ship-state-7)
=unix=duct
=life
crypto-core=acru-12
bug=bug-9
corks=(set wire)
snub=(set ship)
==
::
+$ ames-state-10
$: peers=(map ship ship-state-7)
=unix=duct
=life
crypto-core=acru-12
bug=bug-12
corks=(set wire)
snub=(set ship)
==
::
+$ ship-state-7
$% [%alien alien-agenda-12]
[%known peer-state-7]
==
::
+$ peer-state-7
$: azimuth-state
route=(unit [direct=? =lane])
=qos
=ossuary
snd=(map bone message-pump-state)
rcv=(map bone message-sink-state)
nax=(set [=bone =message-num])
heeds=(set duct)
closing=(set bone)
corked=(set bone)
krocs=(set bone)
==
::
+$ ames-state-11
$: peers=(map ship ship-state-7)
=unix=duct
=life
crypto-core=acru-12
bug=bug-12
corks=(set wire)
snub=(set ship)
cong=[msg=@ud mem=@ud]
==
::
+$ queued-event-11
$% [%call =duct wrapped-task=(hobo task-11)]
[%take =wire =duct =sign]
==
::
+$ task-11
$% [%snub ships=(list ship)]
$<(%snub task)
==
::
+$ ames-state-12
$: peers=(map ship ship-state-12)
=unix=duct
=life
crypto-core=acru-12
bug=bug-12
snub=[form=?(%allow %deny) ships=(set ship)]
cong=[msg=@ud mem=@ud]
==
::
+$ ship-state-12
$% [%alien alien-agenda-12]
[%known peer-state-12]
==
::
+$ alien-agenda-12
$: messages=(list [=duct =plea])
packets=(set =blob)
heeds=(set duct)
==
::
+$ peer-state-12
$: azimuth-state
route=(unit [direct=? =lane])
=qos
=ossuary
snd=(map bone message-pump-state)
rcv=(map bone message-sink-state)
nax=(set [=bone =message-num])
heeds=(set duct)
closing=(set bone)
corked=(set bone)
==
::
+$ bug-12
$: veb=_[`?`%.n `?`%.n `?`%.n `?`%.n `?`%.n `?`%.n `?`%.n `?`%.n]
ships=(set ship)
==
::
++ acru-12 $_ ^?
|%
++ as ^?
|% ++ seal |~([a=pass b=@] *@)
++ sign |~(a=@ *@)
++ sure |~(a=@ *(unit @))
++ tear |~([a=pass b=@] *(unit @))
--
++ de |~([a=@ b=@] *(unit @))
++ dy |~([a=@ b=@] *@)
++ en |~([a=@ b=@] *@)
++ ex ^?
|% ++ fig *@uvH
++ pac *@uvG
++ pub *pass
++ sec *ring
--
++ nu ^?
|% ++ pit |~([a=@ b=@] ^?(..nu))
++ nol |~(a=ring ^?(..nu))
++ com |~(a=pass ^?(..nu))
--
--
:: $bug: debug printing configuration
::
:: veb: verbosity toggles
:: ships: identity filter; if ~, print for all
::
+$ bug
$: veb=_veb-all-off
ships=(set ship)
==
::
+| %dialectics
::
:: $move: output effect; either request or response
::
+$ move [=duct card=(wind note gift)]
:: $queued-event: event to be handled after initial boot completes
::
+$ queued-event
$% [%call =duct wrapped-task=(hobo task)]
[%take =wire =duct =sign]
==
:: $note: request to other vane
::
:: Ames passes a %plea note to another vane when it receives a
:: message on a "forward flow" from a peer, originally passed from
:: one of the peer's vanes to the peer's Ames.
::
:: Ames passes a %plea to itself to handle internal %cork and %pine moves
:: Ames passes a %private-keys to Jael to request our private keys.
:: Ames passes a %public-keys to Jael to request a peer's public
:: keys.
::
+$ note
$~ [%b %wait *@da]
$% $: %b
$% [%wait date=@da]
[%rest date=@da]
== ==
$: %c
$% $>(%warp task:clay)
== ==
$: %d
$% [%flog flog:dill]
== ==
$: %j
$% [%private-keys ~]
[%public-keys ships=(set ship)]
[%turf ~]
[%ruin ships=(set ship)]
== ==
$: @tas
$% [%plea =ship =plea]
== == ==
:: $sign: response from other vane
::
+$ sign
$~ [%behn %wake ~]
$% $: %behn
$% $>(%wake gift:behn)
== ==
$: %jael
$% [%private-keys =life vein=(map life ring)]
[%public-keys =public-keys-result]
[%turf turfs=(list turf)]
== ==
$: @tas
$% [%done error=(unit error)]
[%boon payload=*]
== == ==
:: $message-pump-task: job for |message-pump
::
:: %memo: packetize and send application-level message
:: %hear: handle receipt of ack on fragment or message
:: %near: handle receipt of naxplanation
:: $prod: reset congestion control
:: %wake: handle timer firing
::
+$ message-pump-task
$% [%memo =message-blob]
[%hear =message-num =ack-meat]
[%near =naxplanation]
[%prod ~]
[%wake ~]
==
:: $packet-pump-task: job for |packet-pump
::
:: %hear: deal with a packet acknowledgment
:: %done: deal with message acknowledgment
:: %halt: finish event, possibly updating timer
:: %wake: handle timer firing
:: %prod: reset congestion control
::
+$ packet-pump-task
$% [%hear =message-num =fragment-num]
[%done =message-num lag=@dr]
[%halt ~]
[%wake current=message-num]
[%prod ~]
==
:: $message-sink-task: job for |message-sink
::
:: %done: receive confirmation from vane of processing or failure
:: %drop: clear .message-num from .nax.state
:: %hear: handle receiving a message fragment packet
:: .ok: %.y unless previous failed attempt
::
+$ message-sink-task
$% [%done ok=?]
[%drop =message-num]
[%hear =lane =shut-packet ok=?]
==
--
:: external vane interface
::
|= our=ship
:: larval ames, before %born sets .unix-duct; wraps adult ames core
::
=< =* adult-gate .
=| queued-events=(qeu queued-event)
=| $= cached-state
%- unit
$% [%5 ames-state-5]
[%6 ames-state-6]
[%7 ames-state-7]
[%8 ames-state-8]
[%9 ames-state-9]
[%10 ames-state-10]
[%11 ames-state-11]
[%12 ames-state-12]
[%13 ^ames-state]
==
::
|= [now=@da eny=@ rof=roof]
=* larval-gate .
=* adult-core (adult-gate +<)
=< |%
++ call ^call
++ load ^load
++ scry ^scry
++ stay ^stay
++ take ^take
--
|%
++ larval-core .
:: +call: handle request $task
::
++ call
|= [=duct dud=(unit goof) wrapped-task=(hobo task)]
::
=/ =task ((harden task) wrapped-task)
:: reject larval error notifications
::
?^ dud
~|(%ames-larval-call-dud (mean tang.u.dud))
:: before processing events, make sure we have state loaded
::
=^ molt-moves larval-core molt
::
?: &(!=(~ unix-duct.ames-state.adult-gate) =(~ queued-events))
=^ moves adult-gate (call:adult-core duct dud task)
~> %slog.0^leaf/"ames: metamorphosis"
[(weld molt-moves moves) adult-gate]
:: drop incoming packets until we metamorphose
::
?: ?=(%hear -.task)
[~ larval-gate]
:: %born: set .unix-duct and start draining .queued-events
::
?: ?=(%born -.task)
:: process %born using wrapped adult ames
::
=^ moves adult-gate (call:adult-core duct dud task)
=. moves (weld molt-moves moves)
:: kick off a timer to process the first of .queued-events
::
=. moves :_(moves [duct %pass /larva %b %wait now])
[moves larval-gate]
:: any other event: enqueue it until we have a .unix-duct
::
:: XX what to do with errors?
::
=. queued-events (~(put to queued-events) %call duct task)
[~ larval-gate]
:: +take: handle response $sign
::
++ take
|= [=wire =duct dud=(unit goof) =sign]
?^ dud
~|(%ames-larval-take-dud (mean tang.u.dud))
::
=^ molt-moves larval-core molt
::
?: &(!=(~ unix-duct.ames-state.adult-gate) =(~ queued-events))
=^ moves adult-gate (take:adult-core wire duct dud sign)
~> %slog.0^leaf/"ames: metamorphosis"
[(weld molt-moves moves) adult-gate]
:: enqueue event if not a larval drainage timer
::
?. =(/larva wire)
=. queued-events (~(put to queued-events) %take wire duct sign)
[~ larval-gate]
:: larval event drainage timer; pop and process a queued event
::
?. ?=([%behn %wake *] sign)
~> %slog.0^leaf/"ames: larva: strange sign"
[~ larval-gate]
:: if crashed, print, dequeue, and set next drainage timer
::
?^ error.sign
:: .queued-events should never be ~ here, but if it is, don't crash
::
?: =(~ queued-events)
=/ =tang [leaf/"ames: cursed metamorphosis" u.error.sign]
=/ moves [duct %pass /larva-crash %d %flog %crud %larva tang]~
[moves adult-gate]
:: dequeue and discard crashed event
::
=. queued-events +:~(get to queued-events)
:: .queued-events has been cleared; metamorphose
::
?~ queued-events
~> %slog.0^leaf/"ames: metamorphosis"
[~ adult-gate]
:: set timer to drain next event
::
=/ moves
=/ =tang [leaf/"ames: larva: drain crash" u.error.sign]
:~ [duct %pass /larva-crash %d %flog %crud %larva tang]
[duct %pass /larva %b %wait now]
==
[moves larval-gate]
:: normal drain timer; dequeue and run event
::
=^ first-event queued-events ~(get to queued-events)
=^ moves adult-gate
?- -.first-event
%call (call:adult-core [duct ~ wrapped-task]:+.first-event)
%take (take:adult-core [wire duct ~ sign]:+.first-event)
==
=. moves (weld molt-moves moves)
:: .queued-events has been cleared; done!
::
?~ queued-events
~> %slog.0^leaf/"ames: metamorphosis"
[moves adult-gate]
:: set timer to drain next event
::
=. moves :_(moves [duct %pass /larva %b %wait now])
[moves larval-gate]
:: lifecycle arms; mostly pass-throughs to the contained adult ames
::
++ scry scry:adult-core
++ stay [%13 %larva queued-events ames-state.adult-gate]
++ load
|= $= old
$% $: %4
$% $: %larva
events=(qeu queued-event)
state=ames-state-4
==
[%adult state=ames-state-4]
== ==
$: %5
$% $: %larva
events=(qeu queued-event)
state=ames-state-5
==
[%adult state=ames-state-5]
== ==
$: %6
$% $: %larva
events=(qeu queued-event)
state=ames-state-6
==
[%adult state=ames-state-6]
== ==
$: %7
$% $: %larva
events=(qeu queued-event)
state=ames-state-7
==
[%adult state=ames-state-7]
== ==
$: %8
$% $: %larva
events=(qeu queued-event)
state=ames-state-8
==
[%adult state=ames-state-8]
== ==
$: %9
$% $: %larva
events=(qeu queued-event)
state=ames-state-9
==
[%adult state=ames-state-9]
== ==
$: %10
$% $: %larva
events=(qeu queued-event)
state=ames-state-10
==
[%adult state=ames-state-10]
== ==
$: %11
$% $: %larva
events=(qeu queued-event-11)
state=ames-state-11
==
[%adult state=ames-state-11]
== ==
$: %12
$% $: %larva
events=(qeu queued-event)
state=ames-state-12
==
[%adult state=ames-state-12]
== ==
$: %13
$% $: %larva
events=(qeu queued-event)
state=_ames-state.adult-gate
==
[%adult state=_ames-state.adult-gate]
== == ==
?- old
[%4 %adult *]
$(old [%5 %adult (state-4-to-5:load:adult-core state.old)])
::
[%4 %larva *]
=. state.old (state-4-to-5:load:adult-core state.old)
$(-.old %5)
::
[%5 %adult *]
=. cached-state `[%5 state.old]
~> %slog.0^leaf/"ames: larva reload"
larval-gate
::
[%5 %larva *]
~> %slog.0^leaf/"ames: larva: load"
=. queued-events events.old
larval-gate
::
[%6 %adult *]
=. cached-state `[%6 state.old]
~> %slog.0^leaf/"ames: larva reload"
larval-gate
::
[%6 %larva *]
~> %slog.0^leaf/"ames: larva: load"
=. queued-events events.old
larval-gate
::
[%7 %adult *]
=. cached-state `[%7 state.old]
~> %slog.0^leaf/"ames: larva reload"
larval-gate
::
[%7 %larva *]
~> %slog.0^leaf/"ames: larva: load"
=. queued-events events.old
larval-gate
::
[%8 %adult *]
=. cached-state `[%8 state.old]
~> %slog.0^leaf/"ames: larva reload"
larval-gate
::
[%8 %larva *]
~> %slog.0^leaf/"ames: larva: load"
=. queued-events events.old
larval-gate
::
[%9 %adult *]
=. cached-state `[%9 state.old]
~> %slog.0^leaf/"ames: larva reload"
larval-gate
::
[%9 %larva *]
~> %slog.0^leaf/"ames: larva: load"
=. queued-events events.old
larval-gate
::
[%10 %adult *]
=. cached-state `[%10 state.old]
~> %slog.0^leaf/"ames: larva reload"
larval-gate
::
[%10 %larva *]
~> %slog.1^leaf/"ames: larva: load"
=. queued-events events.old
larval-gate
::
[%11 %adult *]
=. cached-state `[%11 state.old]
~> %slog.0^leaf/"ames: larva reload"
larval-gate
::
[%11 %larva *]
~> %slog.1^leaf/"ames: larva: load"
=. queued-events
:: "+rep:in on a +qeu looks strange, but works fine."
::
%- ~(rep in events.old)
|= [e=queued-event-11 q=(qeu queued-event)]
%- ~(put to q) ^- queued-event
?. ?=(%call -.e) e
=/ task=task-11 ((harden task-11) wrapped-task.e)
%= e
wrapped-task ?.(?=(%snub -.task) task [%snub %deny ships.task])
==
larval-gate
::
[%12 %adult *]
=. cached-state `[%12 state.old]
~> %slog.0^leaf/"ames: larva reload"
larval-gate
::
[%12 %larva *]
~> %slog.1^leaf/"ames: larva: load"
=. queued-events events.old
larval-gate
::
[%13 %adult *] (load:adult-core %13 state.old)
::
[%13 %larva *]
~> %slog.1^leaf/"ames: larva: load"
=. queued-events events.old
=. adult-gate (load:adult-core %13 state.old)
larval-gate
::
==
:: +molt: re-evolve to adult-ames
::
++ molt
^- (quip move _larval-core)
?~ cached-state [~ larval-core]
~> %slog.0^leaf/"ames: molt"
=? u.cached-state ?=(%5 -.u.cached-state)
6+(state-5-to-6:load:adult-core +.u.cached-state)
=? u.cached-state ?=(%6 -.u.cached-state)
7+(state-6-to-7:load:adult-core +.u.cached-state)
=^ moz u.cached-state
?. ?=(%7 -.u.cached-state) [~ u.cached-state]
~> %slog.0^leaf/"ames: init daily recork timer"
:- [[/ames]~ %pass /recork %b %wait `@da`(add now ~d1)]~
8+(state-7-to-8:load:adult-core +.u.cached-state)
=? u.cached-state ?=(%8 -.u.cached-state)
9+(state-8-to-9:load:adult-core +.u.cached-state)
=? u.cached-state ?=(%9 -.u.cached-state)
10+(state-9-to-10:load:adult-core +.u.cached-state)
=? u.cached-state ?=(%10 -.u.cached-state)
11+(state-10-to-11:load:adult-core +.u.cached-state)
=? u.cached-state ?=(%11 -.u.cached-state)
12+(state-11-to-12:load:adult-core +.u.cached-state)
=? u.cached-state ?=(%12 -.u.cached-state)
13+(state-12-to-13:load:adult-core +.u.cached-state)
?> ?=(%13 -.u.cached-state)
=. ames-state.adult-gate +.u.cached-state
[moz larval-core(cached-state ~)]
--
::
=> :: |ev: inner event-handling core
::
~% %per-event ..trace ~
|%
++ ev
=| moves=(list move)
~% %event-gate ..ev ~
|= [[now=@da eny=@ rof=roof] =duct =ames-state]
=* veb veb.bug.ames-state
=| cork-bone=(unit bone) :: modified by +on-kroc
~% %event-core ..$ ~
|%
+| %helpers
::
++ event-core .
++ abet [(flop moves) ames-state]
++ emit |=(=move event-core(moves [move moves]))
++ emil |=(mos=(list move) event-core(moves (weld (flop mos) moves)))
++ channel-state [life crypto-core bug]:ames-state
++ trace-fine (cury trace %fine)
++ trace-ames (cury trace %ames)
++ ev-trace
|= [verb=? =ship print=(trap tape)]
^+ same
(trace-ames verb ship ships.bug.ames-state print)
:: +get-peer-state: lookup .her state or ~
::
++ get-peer-state
|= her=ship
^- (unit peer-state)
::
=- ?.(?=([~ %known *] -) ~ `+.u)
(~(get by peers.ames-state) her)
:: +got-peer-state: lookup .her state or crash
::
++ got-peer-state
|= her=ship
^- peer-state
::
~| %freaky-alien^her
=- ?>(?=(%known -<) ->)
(~(got by peers.ames-state) her)
:: +gut-peer-state: lookup .her state or default
::
++ gut-peer-state
|= her=ship
^- peer-state
=/ ship-state (~(get by peers.ames-state) her)
?. ?=([~ %known *] ship-state)
*peer-state
+.u.ship-state
::
+| %tasks
:: +on-take-done: handle notice from vane that it processed a message
::
++ on-take-done
|= [=wire error=(unit error)]
^+ event-core
?: ?=([%fine ?(%pine %unsub) *] wire)
?~ error event-core
%- (slog leaf/"fine: {<tag.u.error>} {(spud +>.wire)}" ~)
(emit duct %give %miss +>.wire)
?~ parsed=(parse-bone-wire wire)
:: no-op
::
~> %slog.0^leaf/"ames: dropping malformed wire: {(spud wire)}"
event-core
?> ?=([@ her=ship *] u.parsed)
=* her her.u.parsed
=/ peer-core (abed-got:pe her)
|^
?: ?& ?=([%new *] u.parsed)
(lth rift.u.parsed rift.peer-state.peer-core)
==
:: ignore events from an old rift
::
%- %^ ev-trace odd.veb her
|.("dropping old rift wire: {(spud wire)}")
event-core
=/ =bone
?-(u.parsed [%new *] bone.u.parsed, [%old *] bone.u.parsed)
=? peer-core ?=([%old *] u.parsed)
%- %^ ev-trace odd.veb her
|.("parsing old wire: {(spud wire)}")
peer-core
:: relay the vane ack to the foreign peer
::
=< abet
?~(error (send-ack bone) (send-nack bone u.error))
::
:: if processing succeded, send positive ack packet and exit
::
++ send-ack
|= =bone
^+ peer-core
:: handle cork only deals with bones that are in closing
::
(handle-cork:abet:(call:(abed:mi:peer-core bone) %done ok=%.y) bone)
:: failed; send message nack packet
::
++ send-nack
|= [=bone =^error]
^+ peer-core
=. peer-core abet:(call:(abed:mi:peer-core bone) %done ok=%.n)
=. event-core abet:peer-core :: XX extraneous?
:: construct nack-trace message, referencing .failed $message-num
::
=/ failed=message-num
last-acked:(~(got by rcv.peer-state.peer-core) bone)
=/ =naxplanation [failed error]
=/ =message-blob (jam naxplanation)
:: send nack-trace message on associated .nack-bone
::
=/ nack-bone=^bone (mix 0b10 bone)
abet:(call:(abed:mu:(abed-got:pe her) nack-bone) %memo message-blob)
--
:: +on-sift: handle request to filter debug output by ship
::
++ on-sift
|= ships=(list ship)
^+ event-core
=. ships.bug.ames-state (sy ships)
event-core
:: +on-snub: handle request to change ship blacklist
::
++ on-snub
|= [form=?(%allow %deny) ships=(list ship)]
^+ event-core
=. snub.ames-state [form (sy ships)]
event-core
:: +on-spew: handle request to set verbosity toggles on debug output
::
++ on-spew
|= verbs=(list verb)
^+ event-core
:: start from all %.n's, then flip requested toggles
::
=. veb.bug.ames-state
%+ roll verbs
|= [=verb acc=_veb-all-off]
^+ veb.bug.ames-state
?- verb
%snd acc(snd %.y)
%rcv acc(rcv %.y)
%odd acc(odd %.y)
%msg acc(msg %.y)
%ges acc(ges %.y)
%for acc(for %.y)
%rot acc(rot %.y)
%kay acc(kay %.y)
%fin acc(fin %.y)
==
event-core
:: +on-prod: re-send a packet per flow to each of .ships
::
++ on-prod
|= ships=(list ship)
^+ event-core
=? ships =(~ ships) ~(tap in ~(key by peers.ames-state))
|^ ^+ event-core
?~ ships event-core
$(ships t.ships, event-core (prod-peer i.ships))
::
++ prod-peer
|= her=ship
^+ event-core
=/ par (get-peer-state her)
?~ par event-core
=/ peer-core (abed-peer:pe her u.par)
=/ bones ~(tap in ~(key by snd.u.par))
|- ^+ event-core
?~ bones abet:peer-core
=. peer-core abet:(call:(abed:mu:peer-core i.bones) %prod ~)
$(bones t.bones)
--
:: +on-cong: adjust congestion control parameters
::
++ on-cong
|= [msg=@ud mem=@ud]
^+ event-core
=. cong.ames-state msg^mem
event-core
:: +on-stir: recover from timer desync, setting new timers as needed
::
:: .arg is unused, meant to ease future debug commands
::
++ on-stir
|= arg=@t
^+ event-core
=/ want=(set [@da ^duct])
%- ~(rep by peers.ames-state)
|= [[who=ship s=ship-state] acc=(set [@da ^duct])]
?. ?=(%known -.s) acc
%- ~(rep by snd.+.s)
|= [[b=bone m=message-pump-state] acc=_acc]
=* tim next-wake.packet-pump-state.m
?~ tim acc
%- ~(put in acc)
[u.tim `^duct`~[ames+(make-pump-timer-wire who b) /ames]]
=. want
(~(put in want) (add now ~d1) ~[/ames/recork /ames])
::
=/ have
%- ~(gas in *(set [@da ^duct]))
=/ tim
;; (list [@da ^duct])
=< q.q %- need %- need
(rof ~ %bx [[our %$ da+now] /debug/timers])
(skim tim |=([@da hen=^duct] ?=([[%ames ?(%pump %recork) *] *] hen)))
::
:: set timers for flows that should have one set but don't
::
=. event-core
%- ~(rep in (~(dif in want) have))
|= [[wen=@da hen=^duct] this=_event-core]
?> ?=([^ *] hen)
(emit:this ~[/ames] %pass t.i.hen %b %wait wen)
::
:: cancel timers for flows that have one set but shouldn't
::
%- ~(rep in (~(dif in have) want))
|= [[wen=@da hen=^duct] this=_event-core]
?> ?=([^ *] hen)
(emit:this t.hen %pass t.i.hen %b %rest wen)
:: +on-crud: handle event failure; print to dill
::
++ on-crud
|= =error
^+ event-core
(emit duct %pass /crud %d %flog %crud error)
:: +on-heed: handle request to track .ship's responsiveness
::
++ on-heed
|= =ship
^+ event-core
=/ ship-state (~(get by peers.ames-state) ship)
?: ?=([~ %known *] ship-state)
abet:on-heed:(abed-peer:pe ship +.u.ship-state)
%+ enqueue-alien-todo ship
|= todos=alien-agenda
todos(heeds (~(put in heeds.todos) duct))
:: +on-jilt: handle request to stop tracking .ship's responsiveness
::
++ on-jilt
|= =ship
^+ event-core
=/ ship-state (~(get by peers.ames-state) ship)
?: ?=([~ %known *] ship-state)
abet:on-jilt:(abed-peer:pe ship +.u.ship-state)
%+ enqueue-alien-todo ship
|= todos=alien-agenda
todos(heeds (~(del in heeds.todos) duct))
:: +on-hear: handle raw packet receipt
::
++ on-hear
|= [l=lane b=blob d=(unit goof)]
^+ event-core
=/ =shot (sift-shot b)
?: sam.shot (on-hear-packet l shot d)
?: req.shot ~|([%fine %request-events-forbidden] !!)
?^ d
::TODO handle
~& [%fine %done-goofed mote.u.d]
%- (slog tang.u.d)
event-core
:: TODO no longer true
::NOTE we only send requests to ships we know,
:: so we should only get responses from ships we know.
:: below we assume sndr.shot is a known peer.
abet:(on-hear-fine:(abed-got:pe sndr.shot) l shot)
:: +on-hear-packet: handle mildly processed packet receipt
::
++ on-hear-packet
~/ %on-hear-packet
|= [=lane =shot dud=(unit goof)]
^+ event-core
%- (ev-trace rcv.veb sndr.shot |.("received packet"))
::
?: =(our sndr.shot)
event-core
?: .= =(%deny form.snub.ames-state)
(~(has in ships.snub.ames-state) sndr.shot)
%- (ev-trace rcv.veb sndr.shot |.("snubbed"))
event-core
::
%. +<
::
?. =(our rcvr.shot)
on-hear-forward
::
?: =(%keys content.shot)
on-hear-keys
?: ?& ?=(%pawn (clan:title sndr.shot))
!?=([~ %known *] (~(get by peers.ames-state) sndr.shot))
==
on-hear-open
on-hear-shut
:: +on-hear-forward: maybe forward a packet to someone else
::
:: Note that this performs all forwarding requests without
:: filtering. Any protection against DDoS amplification will be
:: provided by Vere.
::
++ on-hear-forward
~/ %on-hear-forward
|= [=lane =shot dud=(unit goof)]
^+ event-core
%- %^ ev-trace for.veb sndr.shot
|.("forward: {<sndr.shot>} -> {<rcvr.shot>}")
:: set .origin.shot if it doesn't have one, re-encode, and send
::
=? origin.shot
&(?=(~ origin.shot) !=(%czar (clan:title sndr.shot)))
?: ?=(%& -.lane)
~
?. (lte (met 3 p.lane) 6)
~| ames-lane-size+p.lane !!
`p.lane
::
=/ =blob (etch-shot shot)
(send-blob & rcvr.shot blob)
:: +on-hear-keys: handle receipt of attestion request
::
++ on-hear-keys
~/ %on-hear-keys
|= [=lane =shot dud=(unit goof)]
=+ %^ ev-trace msg.veb sndr.shot
|.("requested attestation")
?. =(%pawn (clan:title our))
event-core
(send-blob | sndr.shot (attestation-packet sndr.shot 1))
:: +on-hear-open: handle receipt of plaintext comet self-attestation
::
++ on-hear-open
~/ %on-hear-open
|= [=lane =shot dud=(unit goof)]
^+ event-core
=+ %^ ev-trace msg.veb sndr.shot
|.("got attestation")
:: assert the comet can't pretend to be a moon or other address
::
?> ?=(%pawn (clan:title sndr.shot))
:: if we already know .sndr, ignore duplicate attestation
::
=/ ship-state (~(get by peers.ames-state) sndr.shot)
?: ?=([~ %known *] ship-state)
event-core
::
=/ =open-packet (sift-open-packet shot our life.ames-state)
:: add comet as an %alien if we haven't already
::
=? peers.ames-state ?=(~ ship-state)
(~(put by peers.ames-state) sndr.shot %alien *alien-agenda)
:: upgrade comet to %known via on-publ-full
::
=. event-core
=/ crypto-suite=@ud 1
=/ keys
(my [sndr-life.open-packet crypto-suite public-key.open-packet]~)
=/ =point
:* ^= rift 0
^= life sndr-life.open-packet
^= keys keys
^= sponsor `(^sein:title sndr.shot)
==
(on-publ / [%full (my [sndr.shot point]~)])
:: manually add the lane to the peer state
::
=. peers.ames-state
=/ =peer-state (gut-peer-state sndr.shot)
=. route.peer-state `[direct=%.n lane]
(~(put by peers.ames-state) sndr.shot %known peer-state)
::
event-core
:: +on-hear-shut: handle receipt of encrypted packet
::
++ on-hear-shut
~/ %on-hear-shut
|= [=lane =shot dud=(unit goof)]
^+ event-core
=/ sndr-state (~(get by peers.ames-state) sndr.shot)
:: If we don't know them, ask Jael for their keys. If they're a
:: comet, this will also cause us to request a self-attestation
:: from the sender. The packet itself is dropped; we can assume it
:: will be resent.
::
?. ?=([~ %known *] sndr-state)
(enqueue-alien-todo sndr.shot |=(alien-agenda +<))
:: decrypt packet contents using symmetric-key.channel
::
:: If we know them, we have a $channel with them, which we've
:: populated with a .symmetric-key derived from our private key
:: and their public key using elliptic curve Diffie-Hellman.
::
=/ =peer-state +.u.sndr-state
=/ =channel [[our sndr.shot] now channel-state -.peer-state]
~| %ames-crash-on-packet-from^her.channel
=/ =shut-packet
(sift-shut-packet shot [symmetric-key her-life our-life]:channel)
:: non-galaxy: update route with heard lane or forwarded lane
::
=? route.peer-state !=(%czar (clan:title her.channel))
:: if new packet is direct, use that. otherwise, if the new new
:: and old lanes are indirect, use the new one. if the new lane
:: is indirect but the old lane is direct, then if the lanes are
:: identical, don't mark it indirect; if they're not identical,
:: use the new lane and mark it indirect.
::
:: if you mark lane as indirect because you got an indirect
:: packet even though you already had a direct identical lane,
:: then delayed forwarded packets will come later and reset to
:: indirect, so you're unlikely to get a stable direct route
:: (unless the forwarder goes offline for a while).
::
:: conversely, if you don't accept indirect routes with different
:: lanes, then if your lane is stale and they're trying to talk
:: to you, your acks will go to the stale lane, and you'll never
:: time it out unless you reach out to them. this manifests as
:: needing to |hi or dotpost to get a response when the other
:: ship has changed lanes.
::
?: ?=(~ origin.shot)
`[direct=%.y lane]
?: ?=([~ %& *] route.peer-state)
?: =(lane.u.route.peer-state |+u.origin.shot)
route.peer-state
`[direct=%.n |+u.origin.shot]
`[direct=%.n |+u.origin.shot]
:: perform peer-specific handling of packet
::
=< abet
(~(on-hear-shut-packet pe peer-state channel) [lane shut-packet dud])
:: +on-take-boon: receive request to give message to peer
::
++ on-take-boon
|= [=wire payload=*]
^+ event-core
?: ?=([%fine %pine @ *] wire)
?~ her=(slaw %p i.t.t.wire)
:: XX use ev-trace?
=/ =tape "; fine dropping malformed wire {<wire>}"
(emit duct %pass /parse-wire %d %flog %text tape)
abet:(on-pine-boon:(abed-got:pe u.her) t.t.t.wire payload)
::
?~ parsed=(parse-bone-wire wire)
~> %slog.0^leaf/"ames: dropping malformed wire: {(spud wire)}"
event-core
::
?> ?=([@ her=ship *] u.parsed)
=* her her.u.parsed
=/ peer-core (abed-got:pe her)
::
?: ?& ?=([%new *] u.parsed)
(lth rift.u.parsed rift.peer-state.peer-core)
==
:: ignore events from an old rift
::
%- %^ ev-trace odd.veb her
|.("dropping old rift wire: {(spud wire)}")
event-core
=/ =bone
?-(u.parsed [%new *] bone.u.parsed, [%old *] bone.u.parsed)
=? peer-core ?=([%old *] u.parsed)
%- %^ ev-trace odd.veb her
|.("parsing old wire: {(spud wire)}")
peer-core
abet:(on-memo:peer-core bone payload %boon)
:: +on-plea: handle request to send message
::
++ on-plea
|= [=ship =plea]
^+ event-core
:: since flow kill goes like:
:: client vane cork task -> client ames pass cork as plea ->
:: -> server ames sinks plea -> server ames +on-plea (we are here);
:: if it's %cork plea passed to ames from its sink,
:: give %done and process flow closing after +on-take-done call
::
?: =([%a /close ~] plea) (emit duct %give %done ~)
::
?: ?=([%a [%cone ~] *] plea)
:: sent to ourselves from ha-plea, after sinking a remote /pine plea
::
=+ ;;(blk=balk payload.plea)
?> &(=(our her.blk) =(%c van.blk) ?=(^ spr.blk))
=+ nom=(en-roof:balk blk(car %w, cas da/now, spr `path`~[i.spr.blk]))
::
?+ cage=(rof ~ nom) !! :: XX: crashing correct behaviour?
[~ ~] (emit duct %give %done `miss/"{<(en-path:balk blk)>}")
::
[~ ~ *]
=+ !<(=cass:clay q.u.u.cage)
=~ (emit duct %give %boon ud:cass)
(emit duct %give %done ~)
==
==
:: .plea is from local vane to foreign ship
::
=/ ship-state (~(get by peers.ames-state) ship)
::
?. ?=([~ %known *] ship-state)
~& %on-plea
%+ enqueue-alien-todo ship
|= todos=alien-agenda
todos(messages [[duct plea] messages.todos])
::
=/ =peer-state +.u.ship-state
=/ =channel [[our ship] now channel-state -.peer-state]
::
=^ =bone ossuary.peer-state (bind-duct ossuary.peer-state duct)
%- %^ ev-trace msg.veb ship
|. ^- tape
=/ sndr [our our-life.channel]
=/ rcvr [ship her-life.channel]
"plea {<sndr rcvr bone=bone vane.plea path.plea>}"
abet:(~(on-memo pe [peer-state channel]) bone plea %plea)
:: +on-cork: handle request to kill a flow
::
++ on-cork
|= =ship
^+ event-core
=/ =plea [%$ /flow [%cork ~]]
=/ ship-state (~(get by peers.ames-state) ship)
?. ?=([~ %known *] ship-state)
%+ enqueue-alien-todo ship
|= todos=alien-agenda
todos(messages [[duct plea] messages.todos])
=/ =peer-state +.u.ship-state
=/ =channel [[our ship] now channel-state -.peer-state]
::
=/ [=bone ossuary=_ossuary.peer-state]
?^ cork-bone [u.cork-bone ossuary.peer-state]
(bind-duct ossuary.peer-state duct)
=. ossuary.peer-state ossuary
::
?. (~(has by by-bone.ossuary.peer-state) bone)
%. event-core
%^ ev-trace odd.veb ship
|.("trying to cork {<bone=bone>}, not in the ossuary, ignoring")
::
=. closing.peer-state (~(put in closing.peer-state) bone)
%- %^ ev-trace msg.veb ship
|. ^- tape
=/ sndr [our our-life.channel]
=/ rcvr [ship her-life.channel]
"cork plea {<sndr rcvr bone=bone vane.plea path.plea>}"
abet:(~(on-memo pe [peer-state channel]) bone plea %plea)
:: +on-kroc: cork all stale flows from failed subscriptions
::
++ on-kroc
|= dry=?
^+ event-core
:: no-op
::
?: & %.(event-core (slog leaf/"ames: %kroc task not ready" ~))
::
=; [corks=@ core=_event-core]
?. dry core
%.(core (slog leaf/"ames: #{<corks>} flows can be corked" ~))
::
%+ roll ~(tap by peers.ames-state)
|= [[=ship =ship-state] corks=@ core=_event-core]
?. ?=(%known -.ship-state)
corks^core
=/ =peer-state:ames ?>(?=(%known -.ship-state) +.ship-state)
=/ subs=(jar path [bone sub-nonce=@])
%+ roll ~(tap by snd.peer-state)
|= $: [=forward=bone message-pump-state:ames]
subs=(jar path [bone sub-nonce=@])
==
?: (~(has in closing.peer-state) forward-bone)
%. subs
%^ ev-trace &(dry odd.veb) ship
|.
%+ weld "stale flow bone={<forward-bone>} in closing, "
"#{<~(wyt in live:packet-pump-state)>} packets retrying"
?~ duct=(~(get by by-bone.ossuary.peer-state) forward-bone)
subs
?. ?=([* [%gall %use sub=@ @ %out @ @ nonce=@ pub=@ *] *] u.duct)
subs
=/ =wire i.t.u.duct
=/ nonce=(unit @) (rush (snag 7 wire) dem)
%- ~(add ja subs)
:: 0 for old pre-nonce subscriptions
::
:_ [forward-bone ?~(nonce 0 u.nonce)]
?~ nonce wire
:: don't include the sub-nonce in the key
::
(weld (scag 7 wire) (slag 8 wire))
%+ roll ~(tap by subs)
|= [[=wire flows=(list [bone sub-nonce=@])] corks=_corks core=_core]
::
%- tail
%+ roll (sort flows |=([[@ n=@] [@ m=@]] (lte n m)))
|= [[=bone nonce=@] resubs=_(lent flows) corks=_corks core=_core]
=/ app=term ?>(?=([%gall %use sub=@ *] wire) i.t.t.wire)
=/ =path (slag 7 wire)
=/ log=tape "[bone={<bone>} agent={<app>} nonce={<nonce>}] {<path>}"
=; corkable=?
=? corks corkable +(corks)
=? core &(corkable !dry) (%*(on-cork core cork-bone `bone) ship)
(dec resubs)^corks^core
:: checks if this is a stale re-subscription
::
?. =(resubs 1)
%. &
(ev-trace &(dry odd.veb) ship |.((weld "stale %watch plea " log)))
:: the current subscription can be safely corked if there
:: is a flow with a naxplanation ack on a backward bone
::
=+ backward-bone=(mix 0b10 bone)
?. =(2 (mod backward-bone 4))
|
?~ (~(get by rcv.peer-state) backward-bone)
|
%. &
(ev-trace &(dry odd.veb) ship |.((weld "failed %watch plea " log)))
:: +on-take-wake: receive wakeup or error notification from behn
::
++ on-take-wake
|= [=wire error=(unit tang)]
^+ event-core
?: ?=([%alien @ ~] wire)
:: if we haven't received an attestation, ask again
::
?^ error
%- (slog 'ames: attestation timer failed' u.error)
event-core
?~ ship=`(unit @p)`(slaw %p i.t.wire)
%- (slog leaf+"ames: got timer for strange wire: {<wire>}" ~)
event-core
=/ ship-state (~(get by peers.ames-state) u.ship)
?: ?=([~ %known *] ship-state)
event-core
(request-attestation u.ship)
::
?. ?=([%recork ~] wire)
=/ res=(unit ?([%fine her=ship =^wire] [%pump her=ship =bone]))
?+ wire ~| %ames-wire-timer^wire !!
[%pump ship=@ bone=@ ~] (parse-pump-wire &2.wire &3.wire)
[%fine %behn %wake @ *] (parse-fine-wire &4.wire t.t.t.t.wire)
==
?~ res
%- (slog leaf+"ames: got timer for strange wire: {<wire>}" ~)
event-core
::
=/ state=(unit peer-state) (get-peer-state her.u.res)
?~ state
%. event-core
%- slog
[leaf+"ames: got timer for strange ship: {<her.u.res>}, ignoring" ~]
::
=/ peer-core (abed-peer:pe her.u.res u.state)
?- -.u.res
%pump abet:(on-wake:peer-core bone.u.res error)
%fine abet:fi-abet:fi-take-wake:(abed:fi:peer-core wire.u.res)
==
::
=. event-core (emit duct %pass /recork %b %wait `@da`(add now ~d1))
::
?^ error
%- (slog 'ames: recork timer failed' u.error)
event-core
:: recork up to one bone per peer
::
=/ pez ~(tap by peers.ames-state)
|- ^+ event-core
?~ pez event-core
=+ [her sat]=i.pez
?. ?=(%known -.sat)
$(pez t.pez)
$(pez t.pez, event-core abet:recork-one:(abed-peer:pe her +.sat))
:: +on-init: first boot; subscribe to our info from jael
::
++ on-init
^+ event-core
::
=~ (emit duct %pass /turf %j %turf ~)
(emit duct %pass /private-keys %j %private-keys ~)
==
:: +on-priv: set our private key to jael's response
::
++ on-priv
|= [=life vein=(map life private-key)]
^+ event-core
::
=/ =private-key (~(got by vein) life)
=. life.ames-state life
=. crypto-core.ames-state (nol:nu:crub:crypto private-key)
:: recalculate each peer's symmetric key
::
=/ our-private-key sec:ex:crypto-core.ames-state
=. peers.ames-state
%- ~(run by peers.ames-state)
|= =ship-state
^+ ship-state
::
?. ?=(%known -.ship-state)
ship-state
::
=/ =peer-state +.ship-state
=. symmetric-key.peer-state
(derive-symmetric-key public-key.+.ship-state our-private-key)
::
[%known peer-state]
::
event-core
:: +on-publ: update pki data for peer or self
::
++ on-publ
|= [=wire =public-keys-result]
^+ event-core
::
|^ ^+ event-core
::
?- public-keys-result
[%diff @ %rift *]
(on-publ-rift [who to.diff]:public-keys-result)
::
[%diff @ %keys *]
(on-publ-rekey [who to.diff]:public-keys-result)
::
[%diff @ %spon *]
(on-publ-sponsor [who to.diff]:public-keys-result)
::
[%full *]
(on-publ-full points.public-keys-result)
::
[%breach *]
(on-publ-breach who.public-keys-result)
==
:: +on-publ-breach: handle continuity breach of .ship; wipe its state
::
:: Abandon all pretense of continuity and delete all messaging state
:: associated with .ship, including sent and unsent messages.
:: Also cancel all timers related to .ship.
::
++ on-publ-breach
|= =ship
^+ event-core
::
=/ ship-state (~(get by peers.ames-state) ship)
:: we shouldn't be hearing about ships we don't care about
::
?~ ship-state
~> %slog.0^leaf/"ames: breach unknown {<our ship>}"
event-core
:: if an alien breached, this doesn't affect us
::
?: ?=([~ %alien *] ship-state)
~> %slog.0^leaf/"ames: breach alien {<our ship>}"
event-core
~> %slog.0^leaf/"ames: breach peer {<our ship>}"
:: a peer breached; drop messaging state
::
=/ =peer-state +.u.ship-state
=/ old-qos=qos qos.peer-state
:: cancel all timers related to .ship
::
=. event-core
%+ roll ~(tap by snd.peer-state)
|= [[=snd=bone =message-pump-state] core=_event-core]
^+ core
::
?~ next-wake=next-wake.packet-pump-state.message-pump-state
core
:: note: copies +on-pump-rest:message-pump
::
=/ wire (make-pump-timer-wire ship snd-bone)
=/ duct ~[/ames]
(emit:core duct %pass wire %b %rest u.next-wake)
:: reset all peer state other than pki data
::
=. +.peer-state +:*^peer-state
:: print change to quality of service, if any
::
=/ text=(unit tape)
%^ qos-update-text ship %ames
[old-qos qos.peer-state kay.veb ships.bug.ames-state]
::
=? event-core ?=(^ text)
(emit duct %pass /qos %d %flog %text u.text)
:: reinitialize galaxy route if applicable
::
=? route.peer-state =(%czar (clan:title ship))
`[direct=%.y lane=[%& ship]]
::
=. peers.ames-state
(~(put by peers.ames-state) ship [%known peer-state])
::
event-core
:: +on-publ-rekey: handle new key for peer
::
:: TODO: assert .crypto-suite compatibility
::
++ on-publ-rekey
|= $: =ship
=life
crypto-suite=@ud
=public-key
==
^+ event-core
::
=/ ship-state (~(get by peers.ames-state) ship)
?. ?=([~ %known *] ship-state)
=| =point
=. life.point life
=. keys.point (my [life crypto-suite public-key]~)
=. sponsor.point `(^^sein:title rof our now ship)
::
(on-publ-full (my [ship point]~))
::
=/ =peer-state +.u.ship-state
=/ =private-key sec:ex:crypto-core.ames-state
=. symmetric-key.peer-state
(derive-symmetric-key public-key private-key)
::
=. life.peer-state life
=. public-key.peer-state public-key
::
=. peers.ames-state
(~(put by peers.ames-state) ship %known peer-state)
event-core
:: +on-publ-sponsor: handle new or lost sponsor for peer
::
:: TODO: really handle sponsor loss
::
++ on-publ-sponsor
|= [=ship sponsor=(unit ship)]
^+ event-core
::
?~ sponsor
%- (slog leaf+"ames: {(scow %p ship)} lost sponsor, ignoring" ~)
event-core
::
=/ state=(unit peer-state) (get-peer-state ship)
?~ state
%- (slog leaf+"ames: missing peer-state, ignoring" ~)
event-core
=. sponsor.u.state u.sponsor
=. peers.ames-state (~(put by peers.ames-state) ship %known u.state)
event-core
:: +on-publ-full: handle new pki data for peer(s)
::
++ on-publ-full
|= points=(map ship point)
^+ event-core
::
=> .(points ~(tap by points))
|^ ^+ event-core
?~ points event-core
::
=+ ^- [=ship =point] i.points
::
?. (~(has by keys.point) life.point)
$(points t.points)
::
=/ old-ship-state (~(get by peers.ames-state) ship)
::
=. event-core (insert-peer-state ship point)
::
=? event-core ?=([~ %alien *] old-ship-state)
(meet-alien ship point +.u.old-ship-state)
::
$(points t.points)
::
++ meet-alien
|= [=ship =point todos=alien-agenda]
|^ ^+ event-core
:: if we're a comet, send self-attestation packet first
::
=? event-core =(%pawn (clan:title our))
(send-blob | ship (attestation-packet ship life.point))
:: save current duct
::
=/ original-duct duct
:: apply heeds
::
=. event-core
%+ roll ~(tap in heeds.todos)
|= [=^duct core=_event-core]
(on-heed:core(duct duct) ship)
:: apply outgoing messages, reversing for FIFO order
::
=. event-core
%+ reel messages.todos
|= [[=^duct =plea] core=_event-core]
?: ?=(%$ -.plea)
(on-cork:core(duct duct) ship)
(on-plea:core(duct duct) ship plea)
:: apply outgoing packet blobs
::
=. event-core
%+ roll ~(tap in packets.todos)
|= [=blob core=_event-core]
(send-blob:core | ship blob)
:: apply remote scry requests
::
=. event-core (meet-alien-fine keens.todos %keen)
=. event-core (meet-alien-fine pines.todos %pine)
::
event-core(duct original-duct)
::
++ meet-alien-fine
|= [peens=(jug path ^duct) key=?(%keen %pine)]
^+ event-core
=+ peer-core=(abed:pe ship)
=< abet ^+ peer-core
%- ~(rep by peens)
|= [[=path ducts=(set ^duct)] cor=_peer-core]
%- ~(rep in ducts)
|= [=^duct c=_cor]
%.([path duct] ?-(key %pine on-pine:c, %keen on-keen:c))
--
--
:: on-publ-rift: XX
::
++ on-publ-rift
|= [=ship =rift]
^+ event-core
?~ ship-state=(~(get by peers.ames-state) ship)
:: print error here? %rift was probably called before %keys
::
~> %slog.1^leaf/"ames: missing peer-state on-publ-rift"
event-core
?: ?=([%alien *] u.ship-state)
:: ignore aliens
::
event-core
=/ =peer-state +.u.ship-state
=. rift.peer-state rift
=. peers.ames-state
(~(put by peers.ames-state) ship %known peer-state)
event-core
::
++ insert-peer-state
|= [=ship =point]
^+ event-core
::
=/ =peer-state (gut-peer-state ship)
=/ =public-key pass:(~(got by keys.point) life.point)
=/ =private-key sec:ex:crypto-core.ames-state
=/ =symmetric-key (derive-symmetric-key public-key private-key)
::
=. qos.peer-state [%unborn now]
=. life.peer-state life.point
=. rift.peer-state rift.point
=. public-key.peer-state public-key
=. symmetric-key.peer-state symmetric-key
=. sponsor.peer-state
?^ sponsor.point
u.sponsor.point
(^^sein:title rof our now ship)
:: automatically set galaxy route, since unix handles lookup
::
=? route.peer-state ?=(%czar (clan:title ship))
`[direct=%.y lane=[%& ship]]
::
=. peers.ames-state
(~(put by peers.ames-state) ship %known peer-state)
::
event-core
--
:: +on-take-turf: relay %turf move from jael to unix
::
++ on-take-turf
|= turfs=(list turf)
^+ event-core
::
(emit unix-duct.ames-state %give %turf turfs)
:: +on-born: handle unix process restart
::
++ on-born
^+ event-core
::
=. unix-duct.ames-state duct
::
=/ turfs
;; (list turf)
=< q.q %- need %- need
(rof ~ %j `beam`[[our %turf %da now] /])
::
(emit unix-duct.ames-state %give %turf turfs)
:: +on-vega: handle kernel reload
::
++ on-vega event-core
:: +on-trim: handle request to free memory
::
:: %ruin comets not seen for six months
::
++ on-trim ::TODO trim fine parts on high prio
^+ event-core
=; rui=(set @p)
(emit duct %pass /ruin %j %ruin rui)
=- (silt (turn - head))
%+ skim
~(tap by peers.ames-state)
|= [=ship s=ship-state]
?. &(?=(%known -.s) =(%pawn (clan:title ship))) %.n
?& (gth (sub now ~d180) last-contact.qos.s)
::
%- ~(any by snd.s)
|= m=message-pump-state
!=(~ unsent-fragments.m)
==
::
+| %fine-entry-points
::
++ on-pine
|= [=ship =path]
^+ event-core
?< =(our ship) :: XX don't crash?
=/ ship-state (~(get by peers.ames-state) ship)
?: ?=([~ %known *] ship-state)
abet:(on-pine:(abed-peer:pe ship +.u.ship-state) path duct)
%+ enqueue-alien-todo ship
|= todos=alien-agenda
todos(pines (~(put ju pines.todos) path duct))
::
++ on-keen
|= [=ship =path]
^+ event-core
=+ ~:(spit path) :: assert length
=/ ship-state (~(get by peers.ames-state) ship)
?: ?=([~ %known *] ship-state)
abet:(on-keen:(abed-peer:pe ship +.u.ship-state) path duct)
%+ enqueue-alien-todo ship
|= todos=alien-agenda
todos(keens (~(put ju keens.todos) path duct))
::
++ on-cancel-scry
|= [all=? =ship =path]
^+ event-core
?~ ship-state=(~(get by peers.ames-state) ship)
~|(%cancel-scry-missing-peer^ship^path !!)
?. ?=([~ %known *] ship-state)
:: XX delete from alien agenda?
%. event-core
%^ trace-fine fin.veb ship
[ships.bug.ames-state |.("peer still alien, skip cancel-scry")]
=+ peer=(abed:pe ship)
?. (~(has by order.scry.peer-state.peer) path)
event-core
abet:fi-abet:(fi-unsub:(abed:fi:peer path) duct all)
::
+| %implementation
:: +enqueue-alien-todo: helper to enqueue a pending request
::
:: Also requests key and life from Jael on first request.
:: If talking to a comet, requests attestation packet.
::
++ enqueue-alien-todo
|= [=ship mutate=$-(alien-agenda alien-agenda)]
^+ event-core
::
=/ ship-state (~(get by peers.ames-state) ship)
:: create a default $alien-agenda on first contact
::
=+ ^- [already-pending=? todos=alien-agenda]
?~ ship-state
[%.n *alien-agenda]
[%.y ?>(?=(%alien -.u.ship-state) +.u.ship-state)]
:: mutate .todos and apply to permanent state
::
=. todos (mutate todos)
=. peers.ames-state (~(put by peers.ames-state) ship %alien todos)
?: already-pending
event-core
::
?: =(%pawn (clan:title ship))
(request-attestation ship)
:: NB: we specifically look for this wire in +public-keys-give in
:: Jael. if you change it here, you must change it there.
::
(emit duct %pass /public-keys %j %public-keys [n=ship ~ ~])
:: +request-attestation: helper to request attestation from comet
::
:: Also sets a timer to resend the request every 30s.
::
++ request-attestation
|= =ship
^+ event-core
=+ (ev-trace msg.veb ship |.("requesting attestion"))
=. event-core (send-blob | ship (sendkeys-packet ship))
=/ =wire /alien/(scot %p ship)
(emit duct %pass wire %b %wait (add now ~s30))
:: +send-blob: fire packet at .ship and maybe sponsors
::
:: Send to .ship and sponsors until we find a direct lane,
:: skipping .our in the sponsorship chain.
::
:: If we have no PKI data for a recipient, enqueue the packet and
:: request the information from Jael if we haven't already.
::
++ send-blob
~/ %send-blob
|= [for=? =ship =blob]
::
=/ final-ship ship
%- (ev-trace rot.veb final-ship |.("send-blob: to {<ship>}"))
|-
|^ ^+ event-core
::
=/ ship-state (~(get by peers.ames-state) ship)
::
?. ?=([~ %known *] ship-state)
?: ?=(%pawn (clan:title ship))
(try-next-sponsor (^sein:title ship))
%+ enqueue-alien-todo ship
|= todos=alien-agenda
todos(packets (~(put in packets.todos) blob))
::
=/ =peer-state +.u.ship-state
::
:: XX routing hack to mimic old ames.
::
:: Before removing this, consider: moons when their planet is
:: behind a NAT; a planet receiving initial acknowledgment
:: from a star; a planet talking to another planet under
:: another galaxy.
::
?: ?| =(our ship)
?& !=(final-ship ship)
!=(%czar (clan:title ship))
==
==
(try-next-sponsor sponsor.peer-state)
::
?: =(our ship)
:: if forwarding, don't send to sponsor to avoid loops
::
?: for
event-core
(try-next-sponsor sponsor.peer-state)
:: if forwarding, route must not be stale
::
?: &(for (lth last-contact.qos.peer-state (sub now ~h1)))
(try-next-sponsor sponsor.peer-state)
::
?~ route=route.peer-state
%- (ev-trace rot.veb final-ship |.("no route to: {<ship>}"))
(try-next-sponsor sponsor.peer-state)
::
%- (ev-trace rot.veb final-ship |.("trying route: {<ship>}"))
=. event-core
(emit unix-duct.ames-state %give %send lane.u.route blob)
::
?: direct.u.route
event-core
(try-next-sponsor sponsor.peer-state)
::
++ try-next-sponsor
|= sponsor=^ship
^+ event-core
::
?: =(ship sponsor)
event-core
^$(ship sponsor)
--
:: +attestation-packet: generate signed self-attestation for .her
::
:: Sent by a comet on first contact with a peer. Not acked.
::
++ attestation-packet
|= [her=ship =her=life]
^- blob
%- etch-shot
%- etch-open-packet
:_ crypto-core.ames-state
:* ^= public-key pub:ex:crypto-core.ames-state
^= sndr our
^= sndr-life life.ames-state
^= rcvr her
^= rcvr-life her-life
==
:: +sendkeys-packet: generate a request for a self-attestation.
::
:: Sent by non-comets to comets. Not acked.
::
++ sendkeys-packet
|= her=ship
^- blob
?> ?=(%pawn (clan:title her))
%- etch-shot
(encode-keys-packet our her life.ames-state)
::
+| %internals
:: +pe: create nested |peer-core for per-peer processing
::
++ pe
|_ [=peer-state =channel]
+* veb veb.bug.channel
her her.channel
scry scry.peer-state
::
+| %helpers
::
++ peer-core .
++ pe-emit |=(move peer-core(event-core (emit +<)))
++ abed |=(=ship (abed-peer ship (gut-peer-state ship)))
++ abed-got |=(=ship (abed-peer ship (got-peer-state ship)))
++ abed-peer
|= [=ship peer=^peer-state]
%_ peer-core
peer-state peer
channel [[our ship] now channel-state -.peer]
==
::
++ abet
^+ event-core
=. peers.ames-state
(~(put by peers.ames-state) her %known peer-state)
event-core
::
++ pe-trace
|= [verb=? print=(trap tape)]
^+ same
(ev-trace verb her print)
::
:: +got-duct: look up $duct by .bone, asserting already bound
::
++ got-duct
|= =bone
^- ^duct
~| %dangling-bone^her^bone
(~(got by by-bone.ossuary.peer-state) bone)
::
+| %tasks
::
++ on-heed
peer-core(heeds.peer-state (~(put in heeds.peer-state) duct))
::
++ on-jilt
peer-core(heeds.peer-state (~(del in heeds.peer-state) duct))
:: +update-qos: update and maybe print connection status
::
++ update-qos
|= [mode=?(%ames %fine) =new=qos]
^+ peer-core
::
=^ old-qos qos.peer-state [qos.peer-state new-qos]
:: if no update worth reporting, we're done
::
=/ text
%^ qos-update-text her mode
[old-qos new-qos kay.veb ships.bug.ames-state]
?~ text
peer-core
:: print message
::
=. peer-core (pe-emit duct %pass /qos %d %flog %text u.text)
:: if peer has stopped responding, check if %boon's are backing up
::
?. ?=(?(%dead %unborn) -.qos.peer-state)
peer-core
check-clog
:: +on-hear-shut-packet: handle receipt of ack or message fragment
::
++ on-hear-shut-packet
|= [=lane =shut-packet dud=(unit goof)]
^+ peer-core
:: update and print connection status
::
=. peer-core (update-qos %ames %live last-contact=now)
::
=/ =bone bone.shut-packet
::
?: ?=(%& -.meat.shut-packet)
=+ ?. &(?=(^ dud) msg.veb) ~
%. ~
%- slog
:_ tang.u.dud
leaf+"ames: {<her>} fragment crashed {<mote.u.dud>}"
abet:(call:(abed:mi bone) %hear lane shut-packet ?=(~ dud))
:: benign ack on corked bone
::
?: (~(has in corked.peer-state) bone)
peer-core
:: Just try again on error, printing trace
::
:: Note this implies that vanes should never crash on %done,
:: since we have no way to continue using the flow if they do.
::
=+ ?~ dud ~
%. ~
%+ slog leaf+"ames: {<her>} ack crashed {<mote.u.dud>}"
?. msg.veb ~
:- >[bone=bone message-num=message-num meat=meat]:shut-packet<
tang.u.dud
abet:(call:(abed:mu bone) %hear [message-num +.meat]:shut-packet)
:: +on-memo: handle request to send message
::
++ on-memo
|= [=bone payload=* valence=?(%plea %boon)]
^+ peer-core
?: ?& (~(has in closing.peer-state) bone)
!=(payload [%$ /flow %cork ~])
==
~> %slog.0^leaf/"ames: ignoring message on closing bone {<bone>}"
peer-core
?: (~(has in corked.peer-state) bone)
~> %slog.0^leaf/"ames: ignoring message on corked bone {<bone>}"
peer-core
::
=/ =message-blob (dedup-message (jim payload))
=. peer-core abet:(call:(abed:mu bone) %memo message-blob)
::
?: ?& =(%boon valence)
(gte now (add ~s30 last-contact.qos.peer-state))
==
check-clog
peer-core
:: +on-wake: handle timer expiration
::
++ on-wake
|= [=bone error=(unit tang)]
^+ peer-core
:: if we previously errored out, print and reset timer for later
::
:: This really shouldn't happen, but if it does, make sure we
:: don't brick either this messaging flow or Behn.
::
?^ error
=. peer-core
(pe-emit duct %pass /wake-fail %d %flog %crud %ames-wake u.error)
::
?~ message-pump-state=(~(get by snd.peer-state) bone)
peer-core
=* packet-state packet-pump-state.u.message-pump-state
?~ next-wake.packet-state peer-core
:: If we crashed because we woke up too early, assume another
:: timer is already set.
::
?: (lth now.channel u.next-wake.packet-state)
peer-core
::
=/ =wire (make-pump-timer-wire her bone)
(pe-emit duct %pass wire %b %wait (add now.channel ~s30))
:: update and print connection state
::
=. peer-core (update-qos %ames qos:(is-peer-dead now peer-state))
:: expire direct route if the peer is not responding
::
=. peer-state (update-peer-route her peer-state)
:: resend comet attestation packet if first message times out
::
:: The attestation packet doesn't get acked, so if we tried to
:: send a packet but it timed out, maybe they didn't get our
:: attestation.
::
:: Only resend on timeout of packets in the first message we
:: send them, since they should remember forever.
::
=? event-core
?& ?=(%pawn (clan:title our))
=(1 current:(~(got by snd.peer-state) bone))
==
(send-blob | her (attestation-packet [her her-life]:channel))
?: (~(has in corked.peer-state) bone)
:: if the bone was corked the flow doesn't exist anymore
:: TODO: clean up corked bones in the peer state when it's _safe_?
:: (e.g. if this bone is N blocks behind the next one)
::
peer-core
:: maybe resend some timed out packets
::
abet:(call:(abed:mu bone) %wake ~)
::
++ on-hear-fine
|= [=lane =shot]
^+ peer-core
?> =(sndr-tick.shot (mod life.peer-state 16))
::
=/ [=peep =meow] (sift-purr `@ux`content.shot)
=/ =path (slag 3 path.peep)
?. (~(has by order.scry) path)
~&(dead-response/peep peer-core)
fi-abet:(fi-rcv:(abed:fi path) peep meow lane)
::
++ on-keen
|= [=path =^duct]
^+ peer-core
?: (~(has by order.scry) path)
~> %slog.0^leaf/"fine: dupe {(spud path)}"
fi-abet:(fi-sub:(abed:fi path) duct)
=^ keen-id=@ud seq.scry [seq.scry +(seq.scry)]
=. order.scry (~(put by order.scry) path keen-id)
=. keens.scry (put:orm keens.scry keen-id *keen-state)
fi-abet:(fi-start:(abed:fi path) duct)
::
++ on-pine
|= [=path =^duct]
^+ peer-core
?~ blk=(de-part:balk her rift.peer-state life.peer-state path)
!! :: XX: %miss ?
=/ =wire [%fine %pine (scot %p her) path]
(pe-emit duct %pass wire %a %plea her plea=[%$ /pine `*`u.blk])
::
++ on-pine-boon
|= [=path payload=*]
^+ peer-core
?~ blk=(de-part:balk her rift.peer-state life.peer-state path)
!! :: XX: %miss ?
=+ ;;(case=@ud payload)
=. cas.u.blk ud+case
(on-keen (slag 3 (en-path:balk u.blk)) duct)
::
+| %implementation
:: +dedup-message: replace with any existing copy of this message
::
++ dedup-message
|= =message-blob
^+ message-blob
?: (lte (met 13 message-blob) 1)
message-blob
=/ peers-l=(list [=ship =ship-state]) ~(tap by peers.ames-state)
|- ^+ message-blob
=* peer-loop $
?~ peers-l
message-blob
?. ?=(%known -.ship-state.i.peers-l)
peer-loop(peers-l t.peers-l)
=/ snd-l=(list [=bone =message-pump-state])
~(tap by snd.ship-state.i.peers-l)
|- ^+ message-blob
=* bone-loop $
?~ snd-l peer-loop(peers-l t.peers-l)
=* unsent-fragments unsent-fragments.message-pump-state.i.snd-l
=/ blob-l=(list ^message-blob)
~(tap to unsent-messages.message-pump-state.i.snd-l)
|- ^+ message-blob
=* blob-loop $
?^ blob-l
?: =(i.blob-l message-blob)
i.blob-l
blob-loop(blob-l t.blob-l)
?~ unsent-fragments bone-loop(snd-l t.snd-l)
?: =(message-blob fragment.i.unsent-fragments)
`@`fragment.i.unsent-fragments
bone-loop(snd-l t.snd-l)
:: +check-clog: notify clients if peer has stopped responding
::
++ check-clog
^+ peer-core
::
:: Only look at response bones. Request bones are unregulated,
:: since requests tend to be much smaller than responses.
::
=/ pumps=(list message-pump-state)
%+ murn ~(tap by snd.peer-state)
|= [=bone =message-pump-state]
?: =(0 (end 0 bone))
~
`u=message-pump-state
:: if clogged, notify client vane
::
|^ ?. &(nuf-messages nuf-memory) peer-core
%+ roll ~(tap in heeds.peer-state)
|=([d=^duct core=_peer-core] (pe-emit:core d %give %clog her))
:: +nuf-messages: are there enough messages to mark as clogged?
::
++ nuf-messages
=| num=@ud
|- ^- ?
?~ pumps |
=. num
;: add num
(sub [next current]:i.pumps)
~(wyt in unsent-messages.i.pumps)
==
?: (gte num msg.cong.ames-state)
&
$(pumps t.pumps)
:: +nuf-memory: is enough memory used to mark as clogged?
::
++ nuf-memory
=| mem=@ud
|- ^- ?
?~ pumps |
=. mem
%+ add
%- ~(rep in unsent-messages.i.pumps)
|=([a=@ b=_mem] (add b (met 3 a)))
?~ unsent-fragments.i.pumps 0
(met 3 fragment.i.unsent-fragments.i.pumps)
?: (gte mem mem.cong.ames-state)
&
$(pumps t.pumps)
--
:: +send-shut-packet: fire encrypted packet at rcvr and maybe sponsors
::
++ send-shut-packet
|= =shut-packet
^+ peer-core
:: swizzle last bone bit before sending
::
:: The peer has the opposite perspective from ours about what
:: kind of flow this is (forward/backward), so flip the bit
:: here.
::
=. event-core
%^ send-blob | her
%- etch-shot
%: etch-shut-packet
shut-packet(bone (mix 1 bone.shut-packet))
symmetric-key.channel
our her
our-life.channel her-life.channel
==
peer-core
:: +recork-one: re-send the next %cork to the peer
::
++ recork-one
^+ peer-core
=/ boz (sort ~(tap in closing.peer-state) lte)
|- ^+ peer-core
?~ boz peer-core
=/ pum=message-pump-state (~(got by snd.peer-state) i.boz)
?. =(next current):pum
$(boz t.boz)
:: sanity check on the message pump state
::
?. ?& =(~ unsent-messages.pum)
=(~ unsent-fragments.pum)
=(~ live.packet-pump-state.pum)
==
~> %slog.0^leaf/"ames: bad pump state {<her i.boz>}"
$(boz t.boz)
:: no outstanding messages, so send a new %cork
::
:: TODO use +trace
~> %slog.0^leaf/"ames: recork {<her i.boz>}"
=/ =plea [%$ /flow [%cork ~]]
(on-memo i.boz plea %plea)
::
:: +handle-cork: handle flow kill after server ames has taken %done
::
++ handle-cork
|= =bone
^+ peer-core
?. (~(has in closing.peer-state) bone) peer-core
=/ =message-pump-state
(~(gut by snd.peer-state) bone *message-pump-state)
=? peer-core ?=(^ next-wake.packet-pump-state.message-pump-state)
=* next-wake u.next-wake.packet-pump-state.message-pump-state
=/ =wire (make-pump-timer-wire her bone)
:: resetting timer for boons
::
(pe-emit [/ames]~ %pass wire %b %rest next-wake)
=/ nax-bone=^bone (mix 0b10 bone)
=? peer-core (~(has by snd.peer-state) nax-bone)
%. peer-core
%+ pe-trace odd.veb
|.("remove naxplanation flow {<[her bone=nax-bone]>}")
=. peer-state
=, peer-state
%_ peer-state
:: preemptively delete nax flows (e.g. nacks for %watches)
::
snd (~(del by (~(del by snd) bone)) nax-bone)
rcv (~(del by rcv) bone)
corked (~(put in corked) bone)
closing (~(del in closing) bone)
==
peer-core
::
+| %internals
:: +mu: constructor for |pump message sender core
::
++ mu
|_ [=bone state=message-pump-state]
::
+| %helpers
::
++ pump .
++ abed
|= b=^bone
pump(bone b, state (~(gut by snd.peer-state) b *message-pump-state))
++ abet
:: if the bone was corked, it's been removed from the state,
:: so we avoid adding it again.
::
=? snd.peer-state !corked (~(put by snd.peer-state) bone state)
peer-core
::
++ packet-pump (pu packet-pump-state.state)
++ closing (~(has in closing.peer-state) bone)
++ corked (~(has in corked.peer-state) bone)
:: +is-message-num-in-range: %.y unless duplicate or future ack
::
++ is-message-num-in-range
|= =message-num
^- ?
::
?: (gte message-num next.state)
%.n
?: (lth message-num current.state)
%.n
!(~(has by queued-message-acks.state) message-num)
::
+| %entry-points
:: +call: handle a $message-pump-task
::
++ call
|= task=message-pump-task
^+ pump
::
=. pump =~((dispatch-task task) feed-packets)
=+ top=top-live:packet-pump
:: sanity check to isolate error cases
::
?. |(?=(~ top) (lte current.state message-num.key.u.top))
~|([%strange-current current=current.state key.u.top] !!)
:: maybe trigger a timer based on congestion control calculations
::
abet:(call:packet-pump %halt ~)
::
+| %tasks
:: +dispatch-task: perform task-specific processing
::
++ dispatch-task
|= task=message-pump-task
^+ pump
::
?- -.task
%memo (on-memo message-blob.task)
%prod abet:(call:packet-pump %prod ~)
%wake abet:(call:packet-pump %wake current.state)
%near %- on-done
[[message-num %naxplanation error]:naxplanation.task %&]
%hear
?- -.ack-meat.task
%&
(on-hear [message-num fragment-num=p.ack-meat]:task)
::
%|
=/ cork=?
=+ top=top-live:packet-pump
:: If we send a %cork and get an ack, we can know by
:: sequence number that the ack is for the %cork message
::
?& closing
?=(^ top)
=(0 ~(wyt in unsent-messages.state))
=(0 (lent unsent-fragments.state))
=(1 ~(wyt by live.packet-pump-state.state))
=(message-num:task message-num.key.u.top)
==
=+ [ack msg]=[p.ack-meat message-num]:task
=. pump
%- on-done
[[msg ?:(ok.ack [%ok ~] [%nack ~])] cork]
?. &(!ok.ack cork) pump
%. pump
%+ pe-trace odd.veb
|.("got nack for %cork {<bone=bone message-num=msg>}")
== ==
:: +on-memo: handle request to send a message
::
++ on-memo
|= blob=message-blob
pump(unsent-messages.state (~(put to unsent-messages.state) blob))
:: +on-hear: handle packet acknowledgment
::
++ on-hear
|= [=message-num =fragment-num]
^+ pump
:: pass to |packet-pump unless duplicate or future ack
::
?. (is-message-num-in-range message-num)
%. pump
(pe-trace snd.veb |.("hear pump out of range"))
abet:(call:packet-pump %hear message-num fragment-num)
:: +on-done: handle message acknowledgment
::
:: A nack-trace message counts as a valid message nack on the
:: original failed message.
::
:: This prevents us from having to wait for a message nack packet,
:: which would mean we couldn't immediately ack the nack-trace
:: message, which would in turn violate the semantics of backward
:: flows.
::
++ on-done
|= [[=message-num =ack] cork=?]
^+ pump
:: unsent messages from the future should never get acked
::
~| :* bone=bone
mnum=message-num
next=next.state
unsent-messages=~(wyt in unsent-messages.state)
unsent-fragments=(lent unsent-fragments.state)
any-live=!=(~ live.packet-pump-state.state)
==
?> (lth message-num next.state)
:: ignore duplicate message acks
::
?: (lth message-num current.state)
%. pump
%+ pe-trace snd.veb |.
"duplicate done {<current=current.state message-num=message-num>}"
:: ignore duplicate and future acks
::
?. (is-message-num-in-range message-num)
pump
:: clear and print .unsent-fragments if nonempty
::
=? unsent-fragments.state
&(=(current next) ?=(^ unsent-fragments)):state
::
~> %slog.0^leaf/"ames: early message ack {<her>}"
~
:: clear all packets from this message from the packet pump
::
=. pump abet:(call:packet-pump %done message-num lag=*@dr)
:: enqueue this ack to be sent back to local client vane
::
:: Don't clobber a naxplanation with just a nack packet.
::
=? queued-message-acks.state
=/ old (~(get by queued-message-acks.state) message-num)
!?=([~ %naxplanation *] old)
(~(put by queued-message-acks.state) message-num ack)
:: emit local acks from .queued-message-acks until incomplete
::
|- ^+ pump
:: if .current hasn't been fully acked, we're done
::
?~ cur=(~(get by queued-message-acks.state) current.state)
pump
:: .current is complete; pop, emit local ack, and try next message
::
=. queued-message-acks.state
(~(del by queued-message-acks.state) current.state)
:: clear all packets from this message from the packet pump
::
:: Note we did this when the original packet came in, a few lines
:: above. It's not clear why, but it doesn't always clear the
:: packets when it's not the current message. As a workaround,
:: we clear the packets again when we catch up to this packet.
::
:: This is slightly inefficient because we run this twice for
:: each packet and it may emit a few unnecessary packets, but
:: it's not incorrect. pump-metrics are updated only once,
:: at the time when we actually delete the packet.
::
=. pump abet:(call:packet-pump %done current.state lag=*@dr)
:: give %done to vane if we're ready
::
?- -.u.cur
%ok
=. peer-core
:: don't give %done for corks
::
?: cork (pump-cork current.state)
(pump-done current.state ~)
$(current.state +(current.state))
::
%nack pump
::
%naxplanation
=. peer-core (pump-done current.state `error.u.cur)
$(current.state +(current.state))
==
::
+| %implementation
:: +feed-packets: give packets to |packet-pump until full
::
++ feed-packets
:: if nothing to send, no-op
::
?: &(=(~ unsent-messages) =(~ unsent-fragments)):state
pump
:: we have unsent fragments of the current message; feed them
::
?. =(~ unsent-fragments.state)
:: we have unsent fragments of the current message; feed them
::
=^ unsent pump abut:(feed:packet-pump unsent-fragments.state)
=. unsent-fragments.state unsent
:: if it sent all of them, feed it more; otherwise, we're done
::
?~(unsent feed-packets pump)
:: .unsent-messages is nonempty; pop a message off and feed it
::
=^ =message-blob unsent-messages.state
~(get to unsent-messages.state)
:: break .message into .chunks and set as .unsent-fragments
::
=. unsent-fragments.state (split-message next.state message-blob)
:: try to feed packets from the next message
::
=. next.state +(next.state)
feed-packets
:: +pump-done: handle |message-pump's report of message (n)ack
::
++ pump-done
|= [=message-num error=(unit error)]
^+ peer-core
?: ?& =(1 (end 0 bone))
=(1 (end 0 (rsh 0 bone)))
(~(has in corked.peer-state) (mix 0b10 bone))
==
%- %+ pe-trace msg.veb
=/ dat [her bone=bone message-num=message-num -.task]
|.("remove naxplanation flow {<dat>}")
:: XX we avoid re-adding the bone in abet:mu; test that it works
::
=. snd.peer-state (~(del by snd.peer-state) bone)
peer-core
:: if odd bone, ack is on "subscription update" message; no-op
::
?: =(1 (end 0 bone)) peer-core
:: even bone; is this bone a nack-trace bone?
::
?: =(1 (end 0 (rsh 0 bone)))
:: nack-trace bone; assume .ok, clear nack from |message-sink
::
abet:(call:(abed:mi (mix 0b10 bone)) %drop message-num)
?: &(closing ?=(%near -.task))
:: if the bone belongs to a closing flow and we got a
:: naxplanation, don't relay ack to the client vane
::
peer-core
:: not a nack-trace bone; relay ack to client vane
::
(pe-emit (got-duct bone) %give %done error)
:: XX impure +abet pattern
:: +pump-cork: kill flow on cork sender side
::
++ pump-cork
|= =message-num
^+ peer-core
:: clear all packets from this message from the packet pump
::
=. pump abet:(call:packet-pump %done message-num lag=*@dr)
?: corked
%- %+ pe-trace odd.veb
|.("trying to delete a corked bone={<bone>}")
peer-core
=/ nack-bone=^bone (mix 0b10 bone)
=? rcv.peer-state (~(has by rcv.peer-state) nack-bone)
:: if the publisher was behind we remove nacks on that bone
::
(~(del by rcv.peer-state) nack-bone)
=. peer-state
=, peer-state
%_ peer-state
snd (~(del by snd) bone)
rcv (~(del by rcv) bone)
corked (~(put in corked) bone)
closing (~(del in closing) bone)
by-duct.ossuary (~(del by by-duct.ossuary) (got-duct bone))
by-bone.ossuary (~(del by by-bone.ossuary) bone)
==
:: since we got one cork ack, try the next one
::
recork-one
:: +pu: construct |packet-pump core
::
++ pu
|= state=packet-pump-state
::
=| unsent=(list static-fragment)
|%
+| %helpers
++ pack .
:: +abut: abet with gifts
::
++ abut [unsent abet]
++ abet pump(packet-pump-state.state state)
++ pu-trace
|= [verb=? print=(trap tape)]
^+ same
(trace %ames verb her ships.bug.channel print)
::
++ pu-wire (make-pump-timer-wire her bone)
++ pu-emit |=(=note (pe-emit pump-duct %pass pu-wire note))
:: +packet-queue: type for all sent fragments (order: seq number)
::
++ packet-queue
%- (ordered-map live-packet-key live-packet-val)
lte-packets
:: +gauge: inflate a |pump-gauge to track congestion control
::
++ gauge (ga metrics.state ~(wyt by live.state))
:: +to-static-fragment: convenience function for |packet-pump
::
++ to-static-fragment
|= [live-packet-key live-packet-val]
^- static-fragment
[message-num num-fragments fragment-num fragment]
::
++ pump-duct ~[/ames]
++ top-live (pry:packet-queue live.state)
::
+| %entry-points
::
++ call
|= task=packet-pump-task
^+ pack
?- -.task
%hear (on-hear [message-num fragment-num]:task)
%done (on-done message-num.task)
%wake (on-wake current.task)
%prod on-prod
%halt set-wake
==
:: +feed: try to send a list of packets, returning unsent ones
::
++ feed
|= fragments=(list static-fragment)
^+ pack
:: bite off as many fragments as we can send
::
=/ num-slots num-slots:gauge
=/ sent (scag num-slots fragments)
=. unsent (slag num-slots fragments)
:: if nothing to send, we're done
::
?~ sent pack
:: convert $static-fragment's into +ordered-set [key val] pairs
::
=/ send-list
%+ turn sent
|= static-fragment
^- [key=live-packet-key val=live-packet-val]
::
:- [message-num fragment-num]
:- [sent-date=now.channel tries=1 skips=0]
[num-fragments fragment]
:: update .live and .metrics
::
=. live.state (gas:packet-queue live.state send-list)
:: TMI
::
=> .(sent `(list static-fragment)`sent)
:: emit a $shut-packet for each packet to send
::
=. peer-core
%+ roll sent
|= [packet=static-fragment core=_peer-core]
(send-shut-packet bone [message-num %& +]:packet)
pack
::
+| %tasks
:: +on-prod: reset congestion control, re-send packets
::
++ on-prod
^+ pack
?: =(~ next-wake.state)
pack
::
=. metrics.state
%*(. *pump-metrics counter counter.metrics.state)
=. live.state
%+ run:packet-queue live.state
|=(p=live-packet-val p(- *packet-state))
::
=/ sot (max 1 num-slots:gauge)
=/ liv live.state
|- ^+ pack
?: =(0 sot) pack
?: =(~ liv) pack
=^ hed liv (pop:packet-queue liv)
=. peer-core
%+ send-shut-packet bone
[message-num %& +]:(to-static-fragment hed)
$(sot (dec sot))
:: +on-wake: handle packet timeout
::
++ on-wake
|= current=message-num
^+ pack
:: assert temporal coherence
::
?< =(~ next-wake.state)
=. next-wake.state ~
:: tell congestion control a packet timed out
::
=. metrics.state on-timeout:gauge
=| acc=(unit static-fragment)
:: re-send first packet and update its state in-place
::
=; [static-fragment=_acc live=_live.state]
=. live.state live
=? peer-core ?=(^ static-fragment)
%- %+ pu-trace snd.veb
=/ nums [message-num fragment-num]:u.static-fragment
|.("dead {<nums show:gauge>}")
(send-shut-packet bone [message-num %& +]:u.static-fragment)
pack
::
%^ (dip:packet-queue _acc) live.state acc
|= $: acc=_acc
key=live-packet-key
val=live-packet-val
==
^- [new-val=(unit live-packet-val) stop=? _acc]
:: if already acked later message, don't resend
::
?: (lth message-num.key current)
%. [~ stop=%.n ~]
%- slog :_ ~ :- %leaf
"ames: strange wake queue, expected {<current>}, got {<key>}"
:: packet has expired; update it in-place, stop, and produce it
::
=. last-sent.val now.channel
=. tries.val +(tries.val)
::
[`val stop=%.y `(to-static-fragment key val)]
:: +fast-resend-after-ack: resend timed out packets
::
:: After we finally receive an ack, we want to resend all the
:: live packets that have been building up.
::
++ fast-resend-after-ack
|= [=message-num =fragment-num]
^+ pack
=; res=[resends=(list static-fragment) live=_live.state]
=. live.state live.res
=. peer-core
%+ reel resends.res
|= [packet=static-fragment core=_peer-core]
(send-shut-packet bone [message-num %& +]:packet)
pack
::
=/ acc
resends=*(list static-fragment)
::
%^ (dip:packet-queue _acc) live.state acc
|= $: acc=_acc
key=live-packet-key
val=live-packet-val
==
^- [new-val=(unit live-packet-val) stop=? _acc]
?: (lte-packets key [message-num fragment-num])
[new-val=`val stop=%.n acc]
::
?: (gth (next-expiry:gauge -.val) now.channel)
[new-val=`val stop=%.y acc]
::
=. last-sent.val now.channel
=. resends.acc [(to-static-fragment key val) resends.acc]
[new-val=`val stop=%.n acc]
:: +on-hear: handle ack on a live packet
::
:: If the packet was in our queue, delete it and update our
:: metrics, possibly re-sending skipped packets. Otherwise, no-op
::
++ on-hear
|= [=message-num =fragment-num]
^+ pack
::
=- :: if no sent packet matches the ack,
:: don't apply mutations or effects
::
?. found.-
%- (pu-trace snd.veb |.("miss {<show:gauge>}"))
pack
::
=. metrics.state metrics.-
=. live.state live.-
%- ?. ?| =(0 fragment-num)
=(0 (mod counter.metrics.state 20))
==
same
%+ pu-trace snd.veb
|.("send: {<fragment=fragment-num show:gauge>}")
:: .resends is backward, so fold backward and emit
::
=. peer-core
%+ reel resends.-
|= [packet=static-fragment core=_peer-core]
(send-shut-packet bone [message-num %& +]:packet)
(fast-resend-after-ack message-num fragment-num)
::
=/ acc
:* found=`?`%.n
resends=*(list static-fragment)
metrics=metrics.state
==
::
^+ [acc live=live.state]
::
%^ (dip:packet-queue _acc) live.state acc
|= $: acc=_acc
key=live-packet-key
val=live-packet-val
==
^- [new-val=(unit live-packet-val) stop=? _acc]
::
=/ gauge (ga metrics.acc ~(wyt by live.state))
:: is this the acked packet?
::
?: =(key [message-num fragment-num])
:: delete acked packet, update metrics, and stop traversal
::
=. found.acc %.y
=. metrics.acc (on-ack:gauge -.val)
[new-val=~ stop=%.y acc]
:: is this a duplicate ack?
::
?. (lte-packets key [message-num fragment-num])
:: stop, nothing more to do
::
[new-val=`val stop=%.y acc]
:: ack was on later packet; mark skipped, tell gauge, & continue
::
=. skips.val +(skips.val)
=^ resend metrics.acc (on-skipped-packet:gauge -.val)
?. resend
[new-val=`val stop=%.n acc]
::
=. last-sent.val now.channel
=. tries.val +(tries.val)
=. resends.acc [(to-static-fragment key val) resends.acc]
[new-val=`val stop=%.n acc]
:: +on-done: apply ack to all packets from .message-num
::
++ on-done
|= =message-num
^+ pack
::
=- =. metrics.state metrics.-
=. live.state live.-
::
%. (fast-resend-after-ack message-num `fragment-num`0)
(pu-trace snd.veb |.("done {<num=message-num show:gauge>}"))
::
^+ [metrics=metrics.state live=live.state]
::
%^ (dip:packet-queue pump-metrics) live.state acc=metrics.state
|= $: metrics=pump-metrics
key=live-packet-key
val=live-packet-val
==
^- [new-val=(unit live-packet-val) stop=? pump-metrics]
::
=/ gauge (ga metrics ~(wyt by live.state))
:: if we get an out-of-order ack for a message, skip until it
::
?: (lth message-num.key message-num)
[new-val=`val stop=%.n metrics]
:: if packet was from acked message, delete it and continue
::
?: =(message-num.key message-num)
[new-val=~ stop=%.n metrics=(on-ack:gauge -.val)]
:: we've gone past the acked message; we're done
::
[new-val=`val stop=%.y metrics]
:: +set-wake: set, unset, or reset timer, emitting moves
::
++ set-wake
^+ pack
:: if nonempty .live, pry at head to get next wake time
::
=/ new-wake=(unit @da)
?~ head=(pry:packet-queue live.state)
~
`(next-expiry:gauge -.val.u.head)
:: no-op if no change
::
?: =(new-wake next-wake.state) pack
:: unset old timer if non-null
::
=? peer-core !=(~ next-wake.state)
(pu-emit %b %rest (need next-wake.state))
:: set new timer if non-null
::
=? peer-core ?=(^ new-wake)
(pu-emit %b %wait u.new-wake)
::
=? next-wake.state !=(~ next-wake.state) ~ :: unset
=? next-wake.state ?=(^ new-wake) new-wake :: reset
::
pack
--
--
:: +mi: constructor for |sink message receiver core
::
++ mi
|_ [=bone state=message-sink-state]
::
+| %helpers
::
++ sink .
++ abed
|= b=^bone
sink(bone b, state (~(gut by rcv.peer-state) b *message-sink-state))
++ abet
:: if the bone was corked, it's been removed from the state,
:: so we avoid adding it again.
::
=? rcv.peer-state !corked (~(put by rcv.peer-state) bone state)
peer-core
::
++ closing (~(has in closing.peer-state) bone)
++ corked (~(has in corked.peer-state) bone)
++ received
|= =^bone
:: odd bone: %plea request message
:: even bone, 0 second bit: %boon response message
:: even bone, 1 second bit: nack-trace %boon message
::
?: =(1 (end 0 bone)) %plea
?: =(0 (end 0 (rsh 0 bone))) %boon
%nack
::
+| %entry-points
:: +call: handle a $message-sink-task
::
++ call
|= task=message-sink-task
^+ sink
?- -.task
%drop sink(nax.state (~(del in nax.state) message-num.task))
%done (done ok.task)
::
%hear
?. ?| corked
?& %*(corked sink bone (mix 0b10 bone))
=(%nack (received bone))
== ==
(hear [lane shut-packet ok]:task)
:: if we %hear a task on a corked bone, always ack
::
=. peer-core
%+ send-shut-packet bone
[message-num.shut-packet.task %| %| ok=& lag=*@dr]
%. sink
%+ pe-trace odd.veb
|.("hear {<(received bone)>} on corked bone={<bone>}")
==
::
+| %tasks
:: +hear: receive message fragment, possibly completing message
::
++ hear
|= [=lane =shut-packet ok=?]
^+ sink
:: we know this is a fragment, not an ack; expose into namespace
::
?> ?=(%& -.meat.shut-packet)
=+ [num-fragments fragment-num fragment]=+.meat.shut-packet
:: seq: message sequence number, for convenience
::
=/ seq message-num.shut-packet
:: ignore messages from far future; limit to 10 in progress
::
?: (gte seq (add 10 last-acked.state))
%- %+ pe-trace odd.veb
|.("future %hear {<seq=seq last-acked=last-acked.state>}")
sink
::
=/ is-last-fragment=? =(+(fragment-num) num-fragments)
:: always ack a dupe!
::
?: (lte seq last-acked.state)
?. is-last-fragment
:: single packet ack
::
=. peer-core (send-shut-packet bone seq %| %& fragment-num)
%. sink
%+ pe-trace rcv.veb
|.("send dupe ack {<seq=seq^fragment-num=fragment-num>}")
:: whole message (n)ack
::
=/ ok=? !(~(has in nax.state) seq)
=. peer-core (send-shut-packet bone seq %| %| ok lag=`@dr`0)
%. sink
%+ pe-trace rcv.veb
|.("send dupe message ack {<seq=seq>} ok={<ok>}")
:: last-acked<seq<=last-heard; heard message, unprocessed
::
:: Only true if we've heard some packets we haven't acked, which
:: doesn't happen for boons.
::
?: (lte seq last-heard.state)
?: &(is-last-fragment !closing)
:: if not from a closing bone, drop last packet,
:: since we don't know whether to ack or nack
::
%- %+ pe-trace rcv.veb
|. ^- tape
=/ data
:* her seq=seq bone=bone.shut-packet
fragment-num num-fragments
la=last-acked.state lh=last-heard.state
==
"hear last in-progress {<data>}"
sink
:: ack all other packets
::
=. peer-core (send-shut-packet bone seq %| %& fragment-num)
%- %+ pe-trace rcv.veb |.
=/ data
:* seq=seq fragment-num=fragment-num
num-fragments=num-fragments closing=closing
==
"send ack-1 {<data>}"
sink
:: last-heard<seq<10+last-heard; this is a packet in a live message
::
=/ =partial-rcv-message
:: create default if first fragment
::
?~ existing=(~(get by live-messages.state) seq)
[num-fragments num-received=0 fragments=~]
:: we have an existing partial message; check parameters match
::
?> (gth num-fragments.u.existing fragment-num)
?> =(num-fragments.u.existing num-fragments)
::
u.existing
::
=/ already-heard-fragment=?
(~(has by fragments.partial-rcv-message) fragment-num)
:: ack dupes except for the last fragment, in which case drop
::
?: already-heard-fragment
?: is-last-fragment
%- %+ pe-trace rcv.veb |.
=/ data
[her seq=seq lh=last-heard.state la=last-acked.state]
"hear last dupe {<data>}"
sink
=. peer-core (send-shut-packet bone seq %| %& fragment-num)
%. sink
%+ pe-trace rcv.veb
|.("send dupe ack {<her^seq=seq^fragment-num=fragment-num>}")
:: new fragment; store in state and check if message is done
::
=. num-received.partial-rcv-message
+(num-received.partial-rcv-message)
::
=. fragments.partial-rcv-message
(~(put by fragments.partial-rcv-message) fragment-num fragment)
::
=. live-messages.state
(~(put by live-messages.state) seq partial-rcv-message)
:: ack any packet other than the last one, and continue either way
::
=? peer-core !is-last-fragment
%- %+ pe-trace rcv.veb |.
=/ data
[seq=seq fragment-num=fragment-num fragments=num-fragments]
"send ack-2 {<data>}"
(send-shut-packet bone seq %| %& fragment-num)
:: enqueue all completed messages starting at +(last-heard.state)
::
|- ^+ sink
:: if this is not the next message to ack, we're done
::
?. =(seq +(last-heard.state))
sink
:: if we haven't heard anything from this message, we're done
::
?~ live=(~(get by live-messages.state) seq)
sink
:: if the message isn't done yet, we're done
::
?. =(num-received num-fragments):u.live
sink
:: we have whole message; update state, assemble, and send to vane
::
=. last-heard.state +(last-heard.state)
=. live-messages.state (~(del by live-messages.state) seq)
::
%- %+ pe-trace msg.veb
|.("hear {<her>} {<seq=seq>} {<num-fragments.u.live>}kb")
=/ message=* (assemble-fragments [num-fragments fragments]:u.live)
=/ empty=? =(~ pending-vane-ack.state)
:: enqueue message to be sent to local vane
::
=. pending-vane-ack.state
(~(put to pending-vane-ack.state) seq message)
::
=? sink empty (handle-sink seq message ok)
::
$(seq +(seq))
:: +done: handle confirmation of message processing from vane
::
++ done
|= ok=?
^+ sink
::
=^ pending pending-vane-ack.state
~(get to pending-vane-ack.state)
=/ =message-num message-num.p.pending
::
=. last-acked.state +(last-acked.state)
=? nax.state !ok (~(put in nax.state) message-num)
::
=. peer-core
(send-shut-packet bone message-num %| %| ok lag=`@dr`0)
?~ next=~(top to pending-vane-ack.state) sink
(handle-sink message-num.u.next message.u.next ok)
::
+| %implementation
:: +handle-sink: dispatch message
::
++ handle-sink
|= [=message-num message=* ok=?]
^+ sink
|^ ?-((received bone) %plea ha-plea, %boon ha-boon, %nack ha-nack)
::
++ ha-plea
^+ sink
?: |(closing corked) sink
%- %+ pe-trace msg.veb
=/ dat [her bone=bone message-num=message-num]
|.("sink plea {<dat>}")
=; pe=_peer-core
=. peer-core pe
=? sink !ok (call %done ok=%.n)
sink
?. ok
:: send nack-trace with blank .error for security
::
=/ nack-bone=^bone (mix 0b10 bone)
=/ =message-blob (jam [message-num *error])
abet:(call:(abed:mu nack-bone) %memo message-blob)
=+ ;; =plea message
=/ =wire (make-bone-wire her her-rift.channel bone)
::
?. =(vane.plea %$)
?+ vane.plea ~| %ames-evil-vane^our^her^vane.plea !!
%c (pe-emit duct %pass wire %c %plea her plea)
%g (pe-emit duct %pass wire %g %plea her plea)
%j (pe-emit duct %pass wire %j %plea her plea)
==
?: ?=(%pine -.path.plea)
(pe-emit duct %pass wire %a %plea our plea(vane %a, path /cone))
:: a %cork plea is handled using %$ as the recipient vane to
:: account for publishers that still handle ames-to-ames %pleas
::
?> &(?=([%cork *] payload.plea) ?=(%flow -.path.plea))
:: XX FIXME impure +abet pattern...
::
=. closing.peer-state (~(put in closing.peer-state) bone)
(pe-emit duct %pass wire %a %plea her [%a /close ~])
::
:: +ha-boon: handle response message, acking unconditionally
::
:: .bone must be mapped in .ossuary.peer-state, or we crash.
:: This means a malformed message will kill a flow. We
:: could change this to a no-op if we had some sort of security
:: reporting.
::
:: Note that if we had several consecutive packets in the queue
:: and crashed while processing any of them, the %hole card
:: will turn *all* of them into losts/nacks.
::
:: TODO: This handles a previous crash in the client vane, but
:: not in %ames itself.
::
++ ha-boon
^+ sink
?: |(closing corked) sink
%- %+ pe-trace msg.veb |.
:: XX -.task not visible, FIXME
::
=/ dat [her bone=bone message-num=message-num]
?:(ok "sink boon {<dat>}" "crashed on sink boon {<dat>}")
=? moves !ok
:: we previously crashed on this message; notify client vane
::
%+ turn moves
|= =move
?. ?=([* %give %boon *] move) move
[duct.move %give %lost ~]
::
=. peer-core (pe-emit (got-duct bone) %give %boon message)
:: send ack unconditionally
::
(call %done ok=%.y)
::
++ ha-nack
^+ sink
:: if we get a naxplanation for a %cork, the publisher hasn't
:: received the OTA. The /recork timer will retry eventually.
::
%- %+ pe-trace msg.veb
=/ dat [her bone=bone message-num=message-num]
|.("sink naxplanation {<dat>}")
:: flip .bone's second bit to find referenced flow
::
=/ target=^bone (mix 0b10 bone)
=. peer-core
:: notify |message-pump that this message got naxplained
::
abet:(call:(abed:mu target) %near ;;(naxplanation message))
:: ack nack-trace message (only applied if we don't later crash)
::
(call %done ok=%.y)
--
--
:: +fi: constructor for |fine remote scry core
::
++ fi
=> |%
:: +gum: glue together a list of $byts into one
::
:: TODO: move to hoon.hoon (see +cad in lib/tiny)
::
++ gum
::~/ %gum
|= biz=(list byts)
^- byts
:- (roll biz |=([[wid=@ *] acc=@] (add wid acc)))
(can 3 biz)
::
++ etch-peep
|= [=path num=@ud]
^- byts
?> (lth num (bex 32))
=+ (spit path)
%- gum
:~ 4^num :: fragment number
2^wid :: path size
wid^`@`pat :: namespace path
==
::
++ etch-keen
|= [=path num=@ud]
^- hoot ^- @
=/ sic (mod life.ames-state 16)
=/ ric (mod life.peer-state 16)
=/ syn
=/ bod (etch-peep path num)
=/ sig 64^(sign:keys dat.bod)
(can 3 sig bod ~)
(etch-shot [our her] req=& sam=| sic ric ~ syn)
::
++ keys
|%
++ mess
|= [=ship life=@ud =path dat=$@(~ (cask))]
(jam +<)
::
++ sign sigh:as:crypto-core.ames-state
::
++ veri-fra
|= [=path fra=@ud dat=@ux sig=@]
(veri sig (jam path fra dat))
::
++ veri
|= [sig=@ dat=@]
^- ?
(safe:as:(com:nu:crub:crypto public-key.peer-state) sig dat)
::
++ meri
|= [pax=path sig=@ dat=$@(~ (cask))]
(veri sig (mess her life.peer-state pax dat))
--
--
::
|_ [=path keen-id=@ud keen=keen-state]
::
+| %helpers
::
++ fine .
++ abed
|= p=^path
~| no-keen-for-path/p
=. keen-id (~(got by order.scry) p)
fine(path p, keen (got:orm keens.scry keen-id))
::
++ abed-id :: XX not used
|= id=@ud
%- abed
~| no-path-for-id/id
%- need
^- (unit ^path)
%- ~(rep by order.scry)
|= [[p=^path i=@ud] out=(unit ^path)]
^- (unit ^path)
?^ out out
?:(=(id i) `p ~)
::
++ fi-abet
^+ peer-core
?: =, keen
:: num-fragments is 0 when unknown (i.e. no response yet)
:: if no-one is listening, kill request
::
?| =(~ listeners.keen)
&(!=(0 num-fragments) =(num-fragments num-received))
==
abet-gone
=. fine fi-set-wake
=. keens.scry (put:orm keens.scry keen-id keen)
peer-core
::
++ abet-gone
=? fine ?=(^ next-wake.keen)
(fi-rest u.next-wake.keen)
=. keens.scry +:(del:orm keens.scry keen-id)
=. order.scry (~(del by order.scry) path)
peer-core
::
++ fi-full-path
:^ (scot %p her)
(scot %ud rift.peer-state)
(scot %ud life.peer-state)
path
::
++ fi-show
=, keen
:* nex=(lent nex)
hav=(lent hav)
num-fragments=num-fragments
num-received=num-received
next-wake=next-wake
metrics=metrics
==
::
++ fi-trace
|= [verb=? print=(trap tape)]
^+ same
(trace %fine verb her ships.bug.ames-state print)
::
++ fi-deq (deq want)
++ fi-gauge (ga metrics.keen (wyt:fi-deq wan.keen))
++ fi-wait |=(tim=@da (fi-pass-timer %b %wait tim))
++ fi-rest |=(tim=@da (fi-pass-timer %b %rest tim))
++ fi-etch-keen |=(frag=@ud (etch-keen fi-full-path frag))
++ fi-send
|=(=hoot fine(event-core (send-blob for=| her `@ux`hoot)))
::
++ fi-clean-up
|= [=^duct core=_event-core]
:: at the moment only %spider keeps state about remote scries
::
?+ duct core
[[%gall %use %spider @ ship=@ %thread tid=@ *] *]
=/ =cage spider-stop+!>([&7.-.duct |])
=/ poke=* [%0 %m [p q.q]:cage]
=/ =plea [%g /ge/spider poke]
(emit:core duct %pass /fine/unsub %g %plea our plea)
==
::
+| %entry-points
::
++ fi-start
|= =^duct
%- (fi-trace fin.veb |.("keen {(spud fi-full-path)}"))
=. fine (fi-sub duct)
?> =(num-fragments.keen 0)
=/ fra=@ 1
=/ req=hoot (fi-etch-keen fra)
=/ =want [fra req last=now tries=1 skips=0]
=. wan.keen (cons:fi-deq *(pha ^want) want)
(fi-send req)
::
++ fi-rcv
|= [[=full=^path num=@ud] =meow =lane:ames]
^+ fine
=/ og fine
=. peer-core (update-qos %fine %live last-contact=now)
:: handle empty
?: =(0 num.meow)
?> =(~ dat.meow)
(fi-done sig.meow ~)
:: update congestion, or fill details
::
=? fine =(0 num-fragments.keen)
?> =(num 1)
(fi-first-rcv meow)
::
?. ?=([@ @ @ *] full-path)
~| fine-path-too-short+full-path
!!
?. =(`her (slaw %p i.full-path))
~| fine-path-bunk-ship+[full-path her]
!!
?. =(`life.peer-state (slaw %ud i.t.t.full-path))
~| fine-path-bunk-life+[full-path life.peer-state]
!!
?. =(`rift.peer-state (slaw %ud i.t.full-path))
~| fine-path-bunk-rift+[full-path rift.peer-state]
!!
?. (veri-fra:keys [full-path num [dat sig]:meow])
~| fine-purr-fail-signature/num^`@ux`sig.meow
~| life.peer-state
!!
::
=^ found=? fine (fi-on-ack num)
?. found
(fi-fast-retransmit:og num)
=: hav.keen [[num meow] hav.keen]
num-received.keen +(num-received.keen)
==
?. =(num-fragments num-received):keen
fi-continue
(fi-done [sig dat]:fi-sift-full)
::
++ fi-sub
|=(=^duct fine(listeners.keen (~(put in listeners.keen) duct)))
:: scry is autocancelled in +abet if no more listeners
::
++ fi-unsub
|= [=^duct all=?]
?. |(all (~(has in listeners.keen) duct))
%. fine
(fi-trace fin.veb |.("{<duct>} not a listener for {<path>}"))
=? event-core all
:: notify all listeners by inspecting their
:: ducts and sending appropiate clean up moves
::
(~(rep in listeners.keen) fi-clean-up)
%- (fi-trace fin.veb |.("deleting {<path>}"))
fine(listeners.keen ?:(all ~ (~(del in listeners.keen) duct)))
::
+| %implementation
::
++ fi-on-ack
=| marked=(list want)
|= fra=@ud
^- [? _fine]
=; [[found=? cor=_fine] wan=(pha want)]
:- found
?.(found fine cor(wan.keen wan))
%^ (dip-left:fi-deq ,[found=? cor=_fine]) wan.keen
[| fine]
|= [[found=? cor=_fine] =want]
^- [(unit _want) stop=? [found=? cor=_fine]]
=. fine cor
?: =(fra fra.want)
=. metrics.keen
(on-ack:fi-gauge +>.want)
[~ %.y %.y fine]
=. skips.want +(skips.want)
=^ resend=? metrics.keen
(on-skipped-packet:fi-gauge +>.want)
?. resend
[`want %.n found fine]
=. tries.want +(tries.want)
=. last-sent.want now
=. fine (fi-send hoot.want)
[`want %.n found fine]
::
++ fi-done
|= [sig=@ data=$@(~ (cask))]
?> (meri:keys fi-full-path sig data)
%- (fi-trace fin.veb |.("done {(spud fi-full-path)}"))
=/ listeners=(list ^duct) ~(tap in listeners.keen)
=/ dat=(unit (cask)) ?~(data ~ `data)
|- ^+ fine
?~ listeners fine
=. event-core (emit i.listeners %give %tune fi-full-path sig dat)
$(listeners t.listeners)
::
++ fi-first-rcv
|= =meow
^+ fine
::
=; paz=(list want)
fine(keen keen(num-fragments num.meow, nex (tail paz)))
%+ turn (gulf 1 num.meow)
|= fra=@ud
^- want
[fra (fi-etch-keen fra) now 0 0]
:: +fi-continue: send packets based on normal congestion flow
::
++ fi-continue
=| inx=@ud
=| sent=(list @ud)
=/ max num-slots:fi-gauge
|- ^+ fine
?: |(=(~ nex.keen) =(inx max))
fine
=^ =want nex.keen nex.keen
=. last-sent.want now
=. tries.want +(tries.want)
=. wan.keen (snoc:fi-deq wan.keen want)
=. fine (fi-send hoot.want)
$(inx +(inx))
::
++ fi-sift-full
=, keen
~| %frag-mismatch
~| have/num-received
~| need/num-fragments
~| path/path
?> =(num-fragments num-received)
?> =((lent hav) num-received)
(sift-roar num-fragments hav)
::
++ fi-fast-retransmit
|= fra=@ud
=; [cor=_fine wants=(pha want)]
cor(wan.keen wants)
%^ (dip-left:fi-deq ,cor=_fine) wan.keen
fine
|= [cor=_fine =want]
^- [(unit ^want) stop=? cor=_fine]
?. (lte fra.want fra)
[`want & cor]
?: (gth (next-expiry:fi-gauge:cor +>.want) now)
[`want & cor]
=. last-sent.want now
=. cor (fi-send:cor hoot.want)
[`want | cor]
::
++ fi-pass-timer
|= =note
=/ =wire (welp /fine/behn/wake/(scot %p her) path)
fine(event-core (emit unix-duct.ames-state %pass wire note))
::
++ fi-set-wake
^+ fine
=/ next-wake=(unit @da)
?~ want=(peek-left:fi-deq wan.keen)
~
`(next-expiry:fi-gauge +>:u.want)
?: =(next-wake next-wake.keen)
fine
=? fine !=(~ next-wake.keen)
=/ old (need next-wake.keen)
=. next-wake.keen ~
(fi-rest old)
=? fine ?=(^ next-wake)
=. next-wake.keen next-wake
(fi-wait u.next-wake)
fine
:: +fi-take-wake: handle request packet timeout
::
++ fi-take-wake
^+ fine
=. next-wake.keen ~
=. peer-core (update-qos %fine qos:(is-peer-dead now peer-state))
:: has the direct route expired?
::
=. peer-state (update-peer-route her peer-state)
=. metrics.keen on-timeout:fi-gauge
=^ want=(unit want) wan.keen
(pop-left:fi-deq wan.keen)
~| %took-wake-for-empty-want
?> ?=(^ want)
=: tries.u.want +(tries.u.want)
last-sent.u.want now
==
=. wan.keen (cons:fi-deq wan.keen u.want)
(fi-send hoot.u.want)
--
:: +ga: constructor for |pump-gauge congestion control core
::
++ ga
|= [pump-metrics live-packets=@ud]
=* ship her
=* now now.channel
=* metrics +<-
|%
+| %helpers
::
++ ga-trace
|= [verb=? print=(trap tape)]
^+ same
(trace %ames verb ship ships.bug.channel print)
:: +next-expiry: when should a newly sent fresh packet time out?
::
:: Use rtt + 4*sigma, where sigma is the mean deviation of rtt.
:: This should make it unlikely that a packet would time out
:: from a delay, as opposed to an actual packet loss.
::
++ next-expiry
|= packet-state
^- @da
(add last-sent rto)
:: +num-slots: how many packets can we send right now?
::
++ num-slots
^- @ud
(sub-safe cwnd live-packets)
::
:: +clamp-rto: apply min and max to an .rto value
::
++ clamp-rto
|= rto=@dr
^+ rto
(min max-backoff (max ^~((div ~s1 5)) rto))
:: +max-backoff: calculate highest re-send interval
::
:: Keeps pinhole to sponsors open by inspecting the duct (hack).
::
++ max-backoff
^- @dr
?:(?=([[%gall %use %ping *] *] duct) ~s25 ~m2)
:: +in-slow-start: %.y iff we're in "slow-start" mode
::
++ in-slow-start
^- ?
(lth cwnd ssthresh)
:: +in-recovery: %.y iff we're recovering from a skipped packet
::
:: We finish recovering when .live-packets finally dips back
:: down to .cwnd.
::
++ in-recovery
^- ?
(gth live-packets cwnd)
:: +sub-safe: subtract with underflow protection
::
++ sub-safe
|= [a=@ b=@]
^- @
?:((lte a b) 0 (sub a b))
:: +show: produce a printable version of .metrics
::
++ show
=/ ms (div ~s1 1.000)
::
:* rto=(div rto ms)
rtt=(div rtt ms)
rttvar=(div rttvar ms)
ssthresh=ssthresh
cwnd=cwnd
num-live=live-packets
counter=counter
==
::
+| %entry-points
:: +on-ack: adjust metrics based on a packet getting acknowledged
::
++ on-ack
|= =packet-state
^- pump-metrics
::
=. counter +(counter)
:: if below congestion threshold, add 1; else, add avg 1 / cwnd
::
=. cwnd
?: in-slow-start
+(cwnd)
(add cwnd !=(0 (mod (mug now) cwnd)))
:: if this was a re-send, don't adjust rtt or downstream state
::
?: (gth tries.packet-state 1)
metrics
:: rtt-datum: new rtt measurement based on packet roundtrip
::
=/ rtt-datum=@dr (sub-safe now last-sent.packet-state)
:: rtt-error: difference between this measurement and expected
::
=/ rtt-error=@dr
?: (gte rtt-datum rtt)
(sub rtt-datum rtt)
(sub rtt rtt-datum)
:: exponential weighting ratio for .rtt and .rttvar
::
=. rtt (div (add rtt-datum (mul rtt 7)) 8)
=. rttvar (div (add rtt-error (mul rttvar 7)) 8)
=. rto (clamp-rto (add rtt (mul 4 rttvar)))
::
%. metrics
%+ ga-trace ges.veb |.
"ack update {<show rtt-datum=rtt-datum rtt-error=rtt-error>}"
:: +on-skipped-packet: handle misordered ack
::
++ on-skipped-packet
|= packet-state
^- [resend=? pump-metrics]
::
=/ resend=? &((lte tries 1) |(in-recovery (gte skips 3)))
:- resend
::
=? cwnd !in-recovery (max 2 (div cwnd 2))
%- %+ ga-trace snd.veb
|.("skip {<resend=resend in-recovery=in-recovery show>}")
metrics
:: +on-timeout: (re)enter slow-start mode on packet loss
::
++ on-timeout
^- pump-metrics
::
%- (ga-trace ges.veb |.("timeout update {<show>}"))
=: ssthresh (max 1 (div cwnd 2))
cwnd 1
rto (clamp-rto (mul rto 2))
==
metrics
--
--
--
--
:: adult ames, after metamorphosis from larva
::
=| =ames-state
|= [now=@da eny=@ rof=roof]
=* ames-gate .
=* veb veb.bug.ames-state
|%
:: +call: handle request $task
::
++ call
|= [=duct dud=(unit goof) wrapped-task=(hobo task)]
^- [(list move) _ames-gate]
::
=/ =task ((harden task) wrapped-task)
=/ event-core (ev [now eny rof] duct ames-state)
::
=^ moves ames-state
=< abet
:: handle error notifications
::
?^ dud
?+ -.task
(on-crud:event-core -.task tang.u.dud)
%hear (on-hear:event-core lane.task blob.task dud)
==
::
?- -.task
%born on-born:event-core
%hear (on-hear:event-core [lane blob ~]:task)
%heed (on-heed:event-core ship.task)
%init on-init:event-core
%jilt (on-jilt:event-core ship.task)
%prod (on-prod:event-core ships.task)
%sift (on-sift:event-core ships.task)
%snub (on-snub:event-core [form ships]:task)
%spew (on-spew:event-core veb.task)
%cong (on-cong:event-core [msg mem]:task)
%stir (on-stir:event-core arg.task)
%trim on-trim:event-core
%vega on-vega:event-core
%plea (on-plea:event-core [ship plea]:task)
%cork (on-cork:event-core ship.task)
%kroc (on-kroc:event-core dry.task)
::
%pine (on-pine:event-core +.task)
%keen (on-keen:event-core +.task)
%yawn (on-cancel-scry:event-core | +.task)
%wham (on-cancel-scry:event-core & +.task)
==
::
[moves ames-gate]
:: +take: handle response $sign
::
++ take
|= [=wire =duct dud=(unit goof) =sign]
^- [(list move) _ames-gate]
?^ dud
~|(%ames-take-dud (mean tang.u.dud))
::
=/ event-core (ev [now eny rof] duct ames-state)
::
=^ moves ames-state
=< abet
?- sign
[@ %done *] (on-take-done:event-core wire error.sign)
[@ %boon *] (on-take-boon:event-core wire payload.sign)
::
[%behn %wake *] (on-take-wake:event-core wire error.sign)
::
[%jael %turf *] (on-take-turf:event-core turfs.sign)
[%jael %private-keys *] (on-priv:event-core [life vein]:sign)
[%jael %public-keys *] (on-publ:event-core wire public-keys-result.sign)
==
::
[moves ames-gate]
:: +stay: extract state before reload
::
++ stay [%13 %adult ames-state]
:: +load: load in old state after reload
::
++ load
=< |= $= old-state
$% [%13 ^ames-state]
==
^+ ames-gate
?> ?=(%13 -.old-state)
ames-gate(ames-state +.old-state)
:: all state transitions are called from larval ames
::
|%
::
++ state-4-to-5
|= ames-state=ames-state-4
^- ames-state-5
=. peers.ames-state
%- ~(run by peers.ames-state)
|= ship-state=ship-state-4
?. ?=(%known -.ship-state)
ship-state
=. snd.ship-state
%- ~(run by snd.ship-state)
|= =message-pump-state
=. num-live.metrics.packet-pump-state.message-pump-state
~(wyt in live.packet-pump-state.message-pump-state)
message-pump-state
ship-state
ames-state
::
++ state-5-to-6
|= ames-state=ames-state-5
^- ames-state-6
:_ +.ames-state
%- ~(rut by peers.ames-state)
|= [=ship ship-state=ship-state-5]
^- ship-state-6
?. ?=(%known -.ship-state)
ship-state
=/ peer-state=peer-state-5 +.ship-state
=/ =rift
:: harcoded because %jael doesn't have data about comets
::
?: ?=(%pawn (clan:title ship)) 0
;; @ud
=< q.q %- need %- need
(rof ~ %j `beam`[[our %rift %da now] /(scot %p ship)])
:- -.ship-state
:_ +.peer-state
=, -.peer-state
[symmetric-key life rift public-key sponsor]
::
++ state-6-to-7
|= ames-state=ames-state-6
^- ames-state-7
:_ +.ames-state
%- ~(run by peers.ames-state)
|= ship-state=ship-state-6
^- ship-state-7
?. ?=(%known -.ship-state)
ship-state
:- %known
^- peer-state-7
:- +<.ship-state
[route qos ossuary snd rcv nax heeds ~ ~ ~]:ship-state
::
++ state-7-to-8
|= ames-state=ames-state-7
^- ames-state-8
=, ames-state
:* peers unix-duct life crypto-core bug
*(set wire)
==
::
++ state-8-to-9
|= ames-state=ames-state-8
^- ames-state-9
=, ames-state
:* peers unix-duct life crypto-core bug corks
*(set ship)
==
::
++ state-9-to-10
|= ames-state=ames-state-9
^- ames-state-10
=, ames-state
:* peers unix-duct life crypto-core
%= bug.ames-state
veb [&1 &2 &3 &4 &5 &6 |6 %.n]:veb.bug
==
corks snub
==
::
++ state-10-to-11
|= ames-state=ames-state-10
^- ames-state-11
=, ames-state
:* peers unix-duct life crypto-core bug corks snub
:: 5 messages and 100Kb of data outstanding
::
[msg=5 mem=100.000]
==
::
++ state-11-to-12
|= ames-state=ames-state-11
^- ames-state-12
:_ =, ames-state
:* unix-duct
life
crypto-core
bug
[%deny snub]
cong
==
^- (map ship ship-state-12)
%- ~(run by peers.ames-state)
|= ship-state=ship-state-7
^- ship-state-12
?. ?=(%known -.ship-state)
ship-state
%= ship-state
+> [route qos ossuary snd rcv nax heeds closing corked]:+>.ship-state
==
::
++ state-12-to-13
|= old=ames-state-12
^- ^ames-state
=+ !< =rift
q:(need (need (rof ~ %j `beam`[[our %rift %da now] /(scot %p our)])))
:* peers=(~(run by peers.old) ship-state-12-to-13)
unix-duct.old
life.old
rift
crypto-core=(nol:nu:crub:crypto sec:ex:crypto-core.old)
%= bug.old
veb [&1 &2 &3 &4 &5 &6 &7 |7 %.n]:veb.bug.old
==
snub.old
cong.old
==
::
++ ship-state-12-to-13
|= old=ship-state-12
^- ship-state
?: ?=(%alien -.old)
old(heeds [heeds.old ~ ~])
old(corked [corked.old *scry-state])
::
--
:: +scry: dereference namespace
::
++ scry
^- roon
|= [lyc=gang car=term bem=beam]
^- (unit (unit cage))
=* ren car
=* why=shop &/p.bem
=* syd q.bem
=* lot=coin $/r.bem
=* tyl s.bem
::
::TODO don't special-case whey scry
::
?: &(=(%$ ren) =(tyl /whey))
=/ maz=(list mass)
=+ [known alien]=(skid ~(val by peers.ames-state) |=(^ =(%known +<-)))
:~ peers-known+&+known
peers-alien+&+alien
==
``mass+!>(maz)
:: only respond for the local identity, %$ desk, current timestamp
::
?. ?& =(&+our why)
=([%$ %da now] lot)
=(%$ syd)
==
?. for.veb.bug.ames-state ~
~> %slog.0^leaf/"ames: scry-fail {<why=why lot=lot now=now syd=syd>}"
~
:: /ax/protocol/version @
:: /ax/peers (map ship ?(%alien %known))
:: /ax/peers/[ship] ship-state
:: /ax/peers/[ship]/last-contact (unit @da)
:: /ax/peers/[ship]/forward-lane (list lane)
:: /ax/bones/[ship] [snd=(set bone) rcv=(set bone)]
:: /ax/snd-bones/[ship]/[bone] vase
:: /ax/snubbed (?(%allow %deny) (list ship))
:: /ax/fine/hunk/[path/...] (list @ux) scry response fragments
::
?. ?=(%x ren) ~
=> .(tyl `(pole knot)`tyl)
?+ tyl ~
[%protocol %version ~]
``noun+!>(protocol-version)
::
[%peers ~]
:^ ~ ~ %noun
!> ^- (map ship ?(%alien %known))
(~(run by peers.ames-state) head)
::
[%peers her=@ req=*]
=/ who (slaw %p her.tyl)
?~ who [~ ~]
=/ peer (~(get by peers.ames-state) u.who)
?+ req.tyl [~ ~]
~
?~ peer
[~ ~]
``noun+!>(u.peer)
::
[%last-contact ~]
:^ ~ ~ %noun
!> ^- (unit @da)
?. ?=([~ %known *] peer)
~
`last-contact.qos.u.peer
::
[%forward-lane ~]
::
:: this duplicates the routing hack from +send-blob:event-core
:: so long as neither the peer nor the peer's sponsoring galaxy is us,
:: and the peer has been reached recently:
::
:: - no route to the peer, or peer has not been contacted recently:
:: 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)
?: =(our u.who)
~
?. ?=([~ %known *] peer)
=/ sax (rof ~ %j `beam`[[our %saxo %da now] /(scot %p u.who)])
?. ?=([~ ~ *] sax)
~
=/ gal (rear ;;((list ship) q.q.u.u.sax))
?: =(our gal)
~
[%& gal]~
=; zar=(trap (list lane))
?: (lth last-contact.qos.u.peer (sub now ~h1))
$:zar
?~ 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 next)
==
::
[%bones her=@ ~]
=/ who (slaw %p her.tyl)
?~ who [~ ~]
=/ per (~(get by peers.ames-state) u.who)
?. ?=([~ %known *] per) [~ ~]
=/ res
=, u.per
[snd=~(key by snd) rcv=~(key by rcv)]
``noun+!>(res)
::
[%snd-bones her=@ bon=@ ~]
=/ who (slaw %p her.tyl)
?~ who [~ ~]
=/ ost (slaw %ud bon.tyl)
?~ ost [~ ~]
=/ per (~(get by peers.ames-state) u.who)
?. ?=([~ %known *] per) [~ ~]
=/ mps (~(get by snd.u.per) u.ost)
?~ mps [~ ~]
=/ res
u.mps
``noun+!>(!>(res))
::
[%snubbed ~]
``noun+!>([form.snub.ames-state ~(tap in ships.snub.ames-state)])
::
[%fine %hunk lop=@t len=@t pax=^]
::TODO separate endpoint for the full message (instead of packet list)
:: .pax is expected to be a scry path of the shape /vc/desk/rev/etc,
:: so we need to give it the right shape
::
?~ blk=(de-path-soft:balk pax.tyl) ~
=+ nom=(en-roof:balk u.blk)
~| nom
|^
=/ van ?@(vis.nom (end 3 vis.nom) way.vis.nom)
?+ van ~
%c
=+ pem=(rof lyc nom(vis %cp))
?. ?=(^ pem) ~
?. ?=(^ u.pem) ~
~| u.u.pem
=+ per=!<([r=dict:clay w=dict:clay] q.u.u.pem)
?. =([%black ~ ~] rul.r.per) ~
(en-hunk (rof lyc nom))
::
%g
=/ kyr ?@(vis.nom (rsh 3 vis.nom) car.vis.nom)
%- en-hunk
?+ kyr ~
%x (rof lyc nom)
==
==
::
++ en-hunk
|= res=(unit (unit cage))
^+ res
?~ res ~
=/ =hunk [(slav %ud lop.tyl) (slav %ud len.tyl)]
::
=/ hu-co (etch-hunk our [life crypto-core]:ames-state)
?- res
[~ ~] ``noun+!>((etch:hu-co pax.tyl hunk ~))
[~ ~ *] ``noun+!>((etch:hu-co pax.tyl hunk [p q.q]:u.u.res))
==
--
==
--
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