fix: slow down auth loops to be nicer to cpus

scrapli · Nov 25, 2024 · d216749 · d216749
1 parent 7ea22c0
commit d216749
Showing 1 changed file with 14 additions and 0 deletions.
diff --git a/channel/auth.go b/channel/auth.go
@@ -78,6 +78,13 @@ func (c *Channel) authenticateSSH(ctx context.Context, p, pp []byte) *result {
 			return &result{nil, err}
 		}
 
+		if nb == nil {
+			// nothing read, sleep a bit then try again
+			time.Sleep(c.ReadDelay)
+
+			continue
+		}
+
 		b = append(b, nb...)
 
 		err = c.sshMessageHandler(b)
@@ -188,6 +195,13 @@ func (c *Channel) authenticateTelnet(ctx context.Context, u, p []byte) *result {
 			return &result{nil, err}
 		}
 
+		if nb == nil {
+			// nothing read, sleep a bit then try again
+			time.Sleep(c.ReadDelay)
+
+			continue
+		}
+
 		b = append(b, nb...)
 
 		if c.PromptPattern.Match(b) {