From c5eacac64478464032fbd8c5b9e1c029a88b510c Mon Sep 17 00:00:00 2001
From: Quentin McGaw <quentin.mcgaw@gmail.com>
Date: Fri, 20 Feb 2026 16:25:14 +0000
Subject: [PATCH] chore(pmtud/tcp): remove unused TCP flags

---
 internal/pmtud/tcp/tcpheader.go | 14 +++++---------
 1 file changed, 5 insertions(+), 9 deletions(-)

diff --git a/internal/pmtud/tcp/tcpheader.go b/internal/pmtud/tcp/tcpheader.go
index 489052f8..83a4ae38 100644
--- a/internal/pmtud/tcp/tcpheader.go
+++ b/internal/pmtud/tcp/tcpheader.go
@@ -63,15 +63,11 @@ func tcpChecksum(ipHeader, tcpHeader, payload []byte) uint16 {
 }
 
 const (
-	tcpFlagsOffset      = 13
-	finFlag        byte = 0x01
-	synFlag        byte = 0x02
-	rstFlag        byte = 0x04
-	pshFlag        byte = 0x08
-	ackFlag        byte = 0x10
-	urgFlag        byte = 0x20
-	eceFlag        byte = 0x40
-	cwrFlag        byte = 0x80
+	finFlag byte = 0x01
+	synFlag byte = 0x02
+	rstFlag byte = 0x04
+	pshFlag byte = 0x08
+	ackFlag byte = 0x10
 )
 
 type packetType uint8