pkg/packet/rtr: fix parser to check the input length

ivg · fujita · commit 5693c58a4815 · 2025-02-07T10:14:38.000+09:00
diff --git a/pkg/packet/rtr/rtr.go b/pkg/packet/rtr/rtr.go
@@ -364,6 +364,9 @@ func SplitRTR(data []byte, atEOF bool) (advance int, token []byte, err error) {
 }
 
 func ParseRTR(data []byte) (RTRMessage, error) {
+	if len(data) < 1 {
+		return nil, fmt.Errorf("not all bytes are available for RTR message")
+	}
 	var msg RTRMessage
 	switch data[1] {
 	case RTR_SERIAL_NOTIFY:

Original file line number	Diff line number	Diff line change
`@@ -364,6 +364,9 @@ func SplitRTR(data []byte, atEOF bool) (advance int, token []byte, err error) {`
`364`	`364`	`}`
`365`	`365`
`366`	`366`	`func ParseRTR(data []byte) (RTRMessage, error) {`
	`367`	`+ if len(data) < 1 {`
	`368`	`+ return nil, fmt.Errorf("not all bytes are available for RTR message")`
	`369`	`+ }`
`367`	`370`	`var msg RTRMessage`
`368`	`371`	`switch data[1] {`
`369`	`372`	`case RTR_SERIAL_NOTIFY:`