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// 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.
//go:build go1.21
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)
}
}
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