created initial methodREQAclRequestUpdate

requests_acl.go

@@ -1,9 +1,79 @@
 package steward
 
 import (
+	"bytes"
+	"encoding/json"
 	"fmt"
 )
 
+// ----
+
+type methodREQAclRequestUpdate struct {
+	event Event
+}
+
+func (m methodREQAclRequestUpdate) getKind() Event {
+	return m.event
+}
+
+// Handler to get all acl's from a central server.
+func (m methodREQAclRequestUpdate) handler(proc process, message Message, node string) ([]byte, error) {
+	// Get a context with the timeout specified in message.MethodTimeout.
+	ctx, _ := getContextForMethodTimeout(proc.ctx, message)
+
+	proc.processes.wg.Add(1)
+	go func() {
+		defer proc.processes.wg.Done()
+		outCh := make(chan []byte)
+
+		go func() {
+
+			select {
+			case <-ctx.Done():
+				// Done
+			case outCh <- []byte{}:
+			}
+		}()
+
+		select {
+		case <-ctx.Done():
+		// case out := <-outCh:
+		case <-outCh:
+			// Using a func here to set the scope of the lock, and then be able to
+			// defer the unlock when leaving that scope.
+			func() {
+				proc.centralAuth.pki.nodesAcked.mu.Lock()
+				defer proc.centralAuth.pki.nodesAcked.mu.Unlock()
+
+				fmt.Printf(" <---- methodREQKeysRequestUpdate: received acl hash from NODE=%v, HASH=%v\n", message.FromNode, message.Data)
+
+				// Check if the received hash is the same as the one currently active,
+				// TODO: Replace this with checking the ACL hash for the node.
+				if bytes.Equal(proc.centralAuth.pki.nodesAcked.keysAndHash.Hash[:], message.Data) {
+					fmt.Printf("\n ------------ NODE AND CENTRAL ARE EQUAL, NOTHING TO DO, EXITING HANDLER\n\n")
+					return
+				}
+
+				fmt.Printf("\n ------------ NODE AND CENTRAL WERE NOT EQUAL, PREPARING TO SEND NEW VERSION OF KEYS\n\n")
+
+				fmt.Printf(" *     methodREQKeysRequestUpdate: marshalling new keys and hash to send: map=%v, hash=%v\n\n", proc.centralAuth.pki.nodesAcked.keysAndHash.Keys, proc.centralAuth.pki.nodesAcked.keysAndHash.Hash)
+
+				b, err := json.Marshal(proc.centralAuth.pki.nodesAcked.keysAndHash)
+
+				if err != nil {
+					er := fmt.Errorf("error: methodREQKeysRequestUpdate, failed to marshal keys map: %v", err)
+					proc.errorKernel.errSend(proc, message, er)
+				}
+				fmt.Printf("\n ----> methodREQKeysRequestUpdate: SENDING KEYS TO NODE=%v\n", message.FromNode)
+				newReplyMessage(proc, message, b)
+			}()
+		}
+	}()
+
+	// NB: We're not sending an ACK message for this request type.
+	return nil, nil
+}
+
 // ---
 
 type methodREQAclAddCommand struct {