Update dependencies

vendor/tailscale.com/net/packet/icmp.go

@@ -0,0 +1,28 @@
+// Copyright (c) Tailscale Inc & AUTHORS
+// SPDX-License-Identifier: BSD-3-Clause
+
+package packet
+
+import (
+	crand "crypto/rand"
+
+	"encoding/binary"
+)
+
+// ICMPEchoPayload generates a new random ID/Sequence pair, and returns a uint32
+// derived from them, along with the id, sequence and given payload in a buffer.
+// It returns an error if the random source could not be read.
+func ICMPEchoPayload(payload []byte) (idSeq uint32, buf []byte) {
+	buf = make([]byte, len(payload)+4)
+
+	// make a completely random id/sequence combo, which is very unlikely to
+	// collide with a running ping sequence on the host system. Errors are
+	// ignored, that would result in collisions, but errors reading from the
+	// random device are rare, and will cause this process universe to soon end.
+	crand.Read(buf[:4])
+
+	idSeq = binary.LittleEndian.Uint32(buf)
+	copy(buf[4:], payload)
+
+	return
+}