8.7 KiB
8.7 KiB
Communication Protocol (communication.lisp)
Communication Protocol (communication.lisp)
Architectural Intent: Secure Inter-Process Communication & Deterministic Framing
The communication.lisp module defines the low-level transport and framing logic for OpenCortex stimuli.
Implementation (communication.lisp)
(in-package :opencortex)
(defun proto-get (plist key)
"Robustly retrieves a value from a plist, checking both uppercase and lowercase keyword versions."
(let* ((s (string key))
(up (intern (string-upcase s) :keyword))
(dn (intern (string-downcase s) :keyword)))
(or (getf plist up) (getf plist dn))))(in-package :opencortex)
(defvar *actuator-registry* (make-hash-table :test 'equalp)
"Global registry mapping target keywords to their physical actuator functions.")
(defun register-actuator (name fn)
"Registers an actuator function. Actuators receive: (ACTION CONTEXT)."
(let ((key (if (keywordp name) name (intern (string-upcase (string name)) :keyword))))
(setf (gethash key *actuator-registry*) fn)))
;; Removed duplicate frame-message - kept the sanitized version below
(defun read-framed-message (stream)
"Reads a hex-length prefixed S-expression from the stream securely. Skips leading whitespace."
(let ((length-buffer (make-string 6)))
(handler-case
(progn
;; 1. Skip leading whitespace (newlines, spaces, etc.)
(loop for char = (peek-char nil stream nil :eof)
while (and (not (eq char :eof)) (member char '(#\Space #\Newline #\Tab #\Return)))
do (read-char stream))
;; 2. Read the 6-char hex length
(let ((count (read-sequence length-buffer stream)))
(cond ((< count 6) :eof)
(t (let ((len (ignore-errors (parse-integer length-buffer :radix 16))))
(if (not len)
(progn
(harness-log "PROTOCOL ERROR: Invalid header ~s. Attempting resync..." length-buffer)
:error)
(let ((msg-buffer (make-string len)))
(read-sequence msg-buffer stream)
(let ((*read-eval* nil)
(*print-pretty* nil))
(handler-case
(let ((msg (read-from-string msg-buffer)))
(validate-communication-protocol-schema msg)
msg)
(error (c)
(harness-log "PROTOCOL PARSE ERROR: ~a in ~s" c msg-buffer)
:error))))))))))
(error (c)
(harness-log "PROTOCOL READ ERROR: ~a" c)
:error))))
(defun make-hello-message (version)
"Constructs the standard HELLO handshake message."
(list :TYPE :EVENT
:PAYLOAD (list :ACTION :handshake
:VERSION version
:CAPABILITIES '(:AUTH :SWANK :ORG-AST))))Structural Validation (communication-validator.lisp)
The validator ensures that incoming messages adhere to the strict property list schema of the communication protocol.
(in-package :opencortex)
(defun validate-communication-protocol-schema (msg)
"Strict structural validation for incoming communication protocol messages."
(unless (listp msg)
(error "Communication Protocol Schema Error: Message must be a property list (got ~s)" (type-of msg)))
(let ((type (let ((raw (proto-get msg :type))) (if (keywordp raw) (intern (string-upcase (string raw)) :keyword) raw))))
(unless (member type '(:REQUEST :EVENT :RESPONSE :LOG :STATUS))
(progn (harness-log "REJECTED MSG: ~s" msg) (error "Communication Protocol Schema Error: Invalid message type '~a'" type)))
(case type
(:REQUEST
;; Allow missing :target if :source is present in :meta, since reason-gate
;; will infer :target from :source downstream. This preserves "equality of
;; clients" — gateways need not duplicate routing logic.
(let ((target (proto-get msg :target))
(source (proto-get (proto-get msg :meta) :source)))
(unless (or target source)
(error "Communication Protocol Schema Error: REQUEST missing mandatory :target and no :source in :meta to infer it"))
(unless (proto-get msg :payload)
(error "Communication Protocol Schema Error: REQUEST missing mandatory :payload"))))
(:EVENT
(let ((payload (proto-get msg :payload)))
(unless (and payload (listp payload))
(error "Communication Protocol Schema Error: EVENT missing or invalid :payload"))
(unless (or (proto-get payload :action) (proto-get payload :sensor))
(error "Communication Protocol Schema Error: EVENT payload must contain :action or :sensor"))))
(:RESPONSE
(unless (proto-get msg :payload)
(error "Communication Protocol Schema Error: RESPONSE missing mandatory :payload"))))
t))
(defskill :skill-communication-protocol-validator
:priority 95
:trigger (lambda (ctx) (member (getf (getf ctx :payload) :sensor) '(:protocol-received)))
:probabilistic nil
:deterministic (lambda (action ctx)
(declare (ignore ctx))
(validate-communication-protocol-schema action)
action))Message Framing (communication.lisp)
Frames a message with a hex length prefix and ensures all data is serializable.
(defun sanitize-protocol-message (msg)
"Recursively strips non-serializable objects from a protocol plist."
(if (and msg (listp msg))
(let ((clean nil))
(loop for (k v) on msg by #'cddr
do (unless (member k '(:reply-stream :socket :stream))
(push k clean)
(push (if (listp v) (sanitize-protocol-message v) v) clean)))
(nreverse clean))
msg))
(defun frame-message (msg)
"Serializes a message plist and prefixes it with a 6-character hex length."
(let* ((sanitized (sanitize-protocol-message msg))
(payload (let ((*print-pretty* nil) (*read-eval* nil)) (format nil "~s" sanitized)))
(len (length payload)))
(format nil "~6,'0x~a" len payload)))Test Suite
These tests verify the communication protocol functions. Run with:
(fiveam:run! 'communication-protocol-suite)
(defpackage :opencortex-communication-tests
(:use :cl :fiveam :opencortex)
(:export #:communication-protocol-suite))
(in-package :opencortex-communication-tests)
(def-suite communication-protocol-suite
:description "Test suite for opencortex Communication Protocol")
(in-suite communication-protocol-suite)
(test test-framing
"Verify that messages are correctly prefixed with a 6-character hex length."
(let* ((msg '(:type :EVENT :payload (:action :handshake)))
(framed (frame-message msg))
(len-str (subseq framed 0 6))
(payload (subseq framed 6)))
(is (string= "00002C" (string-upcase len-str)))
(is (equalp msg (read-from-string payload)))))
(test test-parse-message
"Verify that incoming framed strings are parsed into Lisp plists."
(let ((framed "00002c(:type :EVENT :payload (:action :handshake))"))
(is (equal '(:type :EVENT :payload (:action :handshake))
(read-from-string (subseq framed 6))))))
(test test-hello-handshake
"Verify the structure of the HELLO handshake message."
(let ((hello (make-hello-message "0.1.0")))
(is (eq :EVENT (getf hello :type)))
(is (eq :handshake (getf (getf hello :payload) :action)))
(is (string= "0.1.0" (getf (getf hello :payload) :version)))))
(test test-find-missing-id
"Verify that the daemon can find a headline missing an ID."
(let* ((ast '(:type :org-data :contents
((:type :HEADLINE :properties (:TITLE "No ID Here") :contents nil)
(:type :HEADLINE :properties (:ID "exists" :TITLE "Has ID") :contents nil))))
(found (find-headline-missing-id ast)))
(is (not (null found)))
(is (string= "No ID Here" (getf (getf found :properties) :TITLE)))))