[gnunet-scheme] 04/04: dht/struct: Define /dht:path-element.

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maxime-devos pushed a commit to branch master
in repository gnunet-scheme.

commit 88c05a7b0d79510641e89d59710c8abf6e149c39
Author: Maxime Devos <maximedevos@telenet.be>
AuthorDate: Fri Jan 21 13:43:54 2022 +0000

    dht/struct: Define /dht:path-element.
    
    Adjusted and copied from src/dht/dht.h.
    
    * gnu/gnunet/dht/struct.scm (/dht:path-element): New structure.
---
 gnu/gnunet/dht/struct.scm | 22 +++++++++++++++++++++-
 1 file changed, 21 insertions(+), 1 deletion(-)

diff --git a/gnu/gnunet/dht/struct.scm b/gnu/gnunet/dht/struct.scm
index b2e8688..644d4dd 100644
--- a/gnu/gnunet/dht/struct.scm
+++ b/gnu/gnunet/dht/struct.scm
@@ -1,5 +1,5 @@
 ;; This file is part of GNUnet.
-;; Copyright (C) 2001, 2002, 2003, 2004, 2009, 2011 GNUnet e.V.
+;; Copyright (C) 2001-2013, 2022 GNUnet e.V.
 ;;
 ;; GNUnet is free software: you can redistribute it and/or modify it
 ;; under the terms of the GNU Affero General Public License as published
@@ -18,6 +18,7 @@
 
 (define-library (gnu gnunet dht struct)
   (export %DHT_BLOOM_SIZE
+         /dht:path-element
          /:msg:dht:client:get:stop
          /:msg:dht:client:get
          /:msg:dht:client:get-result-known
@@ -34,6 +35,8 @@
                /:message-header /time-absolute)
          (only (gnu gnunet hashcode struct)
                /hashcode:512)
+         (only (gnu gnunet crypto struct)
+               /peer-identity /eddsa-signature)
          (only (gnu gnunet netstruct syntactic)
                define-type structure/packed)
          (only (gnu gnunet netstruct procedural)
@@ -42,6 +45,23 @@
     ;; Size of the bloom filter the DT uses to filter peers.
     (define %DHT_BLOOM_SIZE 128)
 
+    ;; GNUNET_DHT_PathElement in C GNUnet
+    (define-type /dht:path-element
+      (structure/packed
+       ;; TODO: path vs. path element?
+       (synopsis "A (signed) path tracking a block's flow through the DHT is
+represented by an array of path elements, each consisting of a peer on the path
+and a signature by which the peer affirms its routing decision.")
+       (field (previous /peer-identity)
+             (synopsis "The previous peer on the path.
+
+The public key used to create the signature is in the
+@emph{next} path element, or the sender of the message if this was the last
+path element.")) ;; C GNUnet says somethin about a non-existent ‘succ’ field?
+       (field (signature /eddsa-signature)
+             (synopsis "Signature affirming the hop, of type
+@code{GNUNET_SIGNATURE_PURPOSE_DHT_HOP}."))))
+
     (define-type /:msg:dht:client:get:stop
       (structure/packed
        (synopsis "Message indicating the DHT should cancel outstanding requests

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