From 7dc0b73dc9fb94da7882503588aa038197e94795 Mon Sep 17 00:00:00 2001
From: Tobias Klauser <tklauser@distanz.ch>
Date: Tue, 29 Jun 2021 15:48:09 +0200
Subject: [PATCH] unix: add SO_ORIGINAL_DST on linux

Change-Id: I243a05696e061f0f0e558518c8af596364aa3668
Reviewed-on: https://go-review.googlesource.com/c/sys/+/331609
Trust: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Go Bot <gobot@golang.org>
Reviewed-by: Matt Layher <mdlayher@gmail.com>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
---
 unix/linux/types.go  | 3 +++
 unix/ztypes_linux.go | 2 ++
 2 files changed, 5 insertions(+)

diff --git a/unix/linux/types.go b/unix/linux/types.go
index c400c031..41081f2d 100644
--- a/unix/linux/types.go
+++ b/unix/linux/types.go
@@ -115,6 +115,7 @@ struct termios2 {
 #include <linux/netfilter/nf_tables_compat.h>
 #include <linux/netfilter/nfnetlink.h>
 #include <linux/netfilter.h>
+#include <linux/netfilter_ipv4.h>
 #include <linux/netlink.h>
 #include <linux/nexthop.h>
 #include <linux/nfc.h>
@@ -1767,6 +1768,8 @@ const (
 	NFPROTO_NUMPROTO = C.NFPROTO_NUMPROTO
 )
 
+const SO_ORIGINAL_DST = C.SO_ORIGINAL_DST
+
 // netfilter nfnetlink
 type Nfgenmsg C.struct_nfgenmsg
 
diff --git a/unix/ztypes_linux.go b/unix/ztypes_linux.go
index 72887abe..c9d7eb41 100644
--- a/unix/ztypes_linux.go
+++ b/unix/ztypes_linux.go
@@ -1773,6 +1773,8 @@ const (
 	NFPROTO_NUMPROTO = 0xd
 )
 
+const SO_ORIGINAL_DST = 0x50
+
 type Nfgenmsg struct {
 	Nfgen_family uint8
 	Version      uint8