1 files changed, 67 insertions, 0 deletions
diff --git a/src/vendor/golang.org/x/net/quic/log.go b/src/vendor/golang.org/x/net/quic/log.go
new file mode 100644
index 0000000000..eee2b5fd61
--- /dev/null
+++ b/src/vendor/golang.org/x/net/quic/log.go
@@ -0,0 +1,67 @@
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package quic
+
+import (
+	"fmt"
+	"os"
+	"strings"
+)
+
+var logPackets bool
+
+// Parse GODEBUG settings.
+//
+// GODEBUG=quiclogpackets=1 -- log every packet sent and received.
+func init() {
+	s := os.Getenv("GODEBUG")
+	for len(s) > 0 {
+		var opt string
+		opt, s, _ = strings.Cut(s, ",")
+		switch opt {
+		case "quiclogpackets=1":
+			logPackets = true
+		}
+	}
+}
+
+func logInboundLongPacket(c *Conn, p longPacket) {
+	if !logPackets {
+		return
+	}
+	prefix := c.String()
+	fmt.Printf("%v recv %v %v\n", prefix, p.ptype, p.num)
+	logFrames(prefix+"   <- ", p.payload)
+}
+
+func logInboundShortPacket(c *Conn, p shortPacket) {
+	if !logPackets {
+		return
+	}
+	prefix := c.String()
+	fmt.Printf("%v recv 1-RTT %v\n", prefix, p.num)
+	logFrames(prefix+"   <- ", p.payload)
+}
+
+func logSentPacket(c *Conn, ptype packetType, pnum packetNumber, src, dst, payload []byte) {
+	if !logPackets || len(payload) == 0 {
+		return
+	}
+	prefix := c.String()
+	fmt.Printf("%v send %v %v\n", prefix, ptype, pnum)
+	logFrames(prefix+"   -> ", payload)
+}
+
+func logFrames(prefix string, payload []byte) {
+	for len(payload) > 0 {
+		f, n := parseDebugFrame(payload)
+		if n < 0 {
+			fmt.Printf("%vBAD DATA\n", prefix)
+			break
+		}
+		payload = payload[n:]
+		fmt.Printf("%v%v\n", prefix, f)
+	}
+}