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-rw-r--r--conn/gso_linux.go2
1 files changed, 1 insertions, 1 deletions
diff --git a/conn/gso_linux.go b/conn/gso_linux.go
index b8599ce..8596b29 100644
--- a/conn/gso_linux.go
+++ b/conn/gso_linux.go
@@ -56,7 +56,7 @@ func setGSOSize(control *[]byte, gsoSize uint16) {
hdr.Level = unix.SOL_UDP
hdr.Type = unix.UDP_SEGMENT
hdr.SetLen(unix.CmsgLen(sizeOfGSOData))
- copy((gsoControl)[unix.SizeofCmsghdr:], unsafe.Slice((*byte)(unsafe.Pointer(&gsoSize)), sizeOfGSOData))
+ copy((gsoControl)[unix.CmsgLen(0):], unsafe.Slice((*byte)(unsafe.Pointer(&gsoSize)), sizeOfGSOData))
*control = (*control)[:existingLen+space]
}