From 71a906ea0cb772828c4ad9c2353cdd5a0bb0776d Mon Sep 17 00:00:00 2001
From: Jordan Whited <jordan@tailscale.com>
Date: Thu, 16 Feb 2023 01:39:27 +0000
Subject: [PATCH] unix/linux: add TUN flags and virtio_net_hdr constants

Change-Id: I10c86c100f4db77740eff6f07d91d6489b21b6f8
GitHub-Last-Rev: 3e8d7343cd26aacb1208783643f8d79e0c7d679b
GitHub-Pull-Request: golang/sys#148
Reviewed-on: https://go-review.googlesource.com/c/sys/+/468656
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Bryan Mills <bcmills@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
---
 unix/linux/types.go  | 32 +++++++++++++++++++++++++++++++-
 unix/ztypes_linux.go | 22 ++++++++++++++++++++++
 2 files changed, 53 insertions(+), 1 deletion(-)

diff --git a/unix/linux/types.go b/unix/linux/types.go
index 2c282c49..36c439dd 100644
--- a/unix/linux/types.go
+++ b/unix/linux/types.go
@@ -110,6 +110,7 @@ struct termios2 {
 #include <linux/if_bridge.h>
 #include <linux/if_packet.h>
 #include <linux/if_pppox.h>
+#include <linux/if_tun.h>
 #include <linux/if_xdp.h>
 #include <linux/ipc.h>
 #include <linux/kcm.h>
@@ -141,9 +142,10 @@ struct termios2 {
 #include <linux/stat.h>
 #include <linux/taskstats.h>
 #include <linux/tipc.h>
+#include <linux/virtio_net.h>
+#include <linux/vm_sockets.h>
 #include <linux/watchdog.h>
 #include <linux/wireguard.h>
-#include <linux/vm_sockets.h>
 
 #include <mtd/mtd-user.h>
 
@@ -5666,3 +5668,31 @@ const (
 	AUDIT_NLGRP_NONE    = C.AUDIT_NLGRP_NONE
 	AUDIT_NLGRP_READLOG = C.AUDIT_NLGRP_READLOG
 )
+
+// generated by:
+// perl -nlE '/^#define (TUN_F_\w+)/ && say "$1 = C.$1"' include/uapi/linux/if_tun.h
+const (
+	TUN_F_CSUM    = C.TUN_F_CSUM
+	TUN_F_TSO4    = C.TUN_F_TSO4
+	TUN_F_TSO6    = C.TUN_F_TSO6
+	TUN_F_TSO_ECN = C.TUN_F_TSO_ECN
+	TUN_F_UFO     = C.TUN_F_UFO
+)
+
+// generated by:
+// perl -nlE '/^#define (VIRTIO_NET_HDR_F_\w+)/ && say "$1 = C.$1"' include/uapi/linux/virtio_net.h
+const (
+	VIRTIO_NET_HDR_F_NEEDS_CSUM = C.VIRTIO_NET_HDR_F_NEEDS_CSUM
+	VIRTIO_NET_HDR_F_DATA_VALID = C.VIRTIO_NET_HDR_F_DATA_VALID
+	VIRTIO_NET_HDR_F_RSC_INFO   = C.VIRTIO_NET_HDR_F_RSC_INFO
+)
+
+// generated by:
+// perl -nlE '/^#define (VIRTIO_NET_HDR_GSO_\w+)/ && say "$1 = C.$1"' include/uapi/linux/virtio_net.h
+const (
+	VIRTIO_NET_HDR_GSO_NONE  = C.VIRTIO_NET_HDR_GSO_NONE
+	VIRTIO_NET_HDR_GSO_TCPV4 = C.VIRTIO_NET_HDR_GSO_TCPV4
+	VIRTIO_NET_HDR_GSO_UDP   = C.VIRTIO_NET_HDR_GSO_UDP
+	VIRTIO_NET_HDR_GSO_TCPV6 = C.VIRTIO_NET_HDR_GSO_TCPV6
+	VIRTIO_NET_HDR_GSO_ECN   = C.VIRTIO_NET_HDR_GSO_ECN
+)
diff --git a/unix/ztypes_linux.go b/unix/ztypes_linux.go
index 7d9fc8f1..e3dee3fd 100644
--- a/unix/ztypes_linux.go
+++ b/unix/ztypes_linux.go
@@ -5752,3 +5752,25 @@ const (
 	AUDIT_NLGRP_NONE    = 0x0
 	AUDIT_NLGRP_READLOG = 0x1
 )
+
+const (
+	TUN_F_CSUM    = 0x1
+	TUN_F_TSO4    = 0x2
+	TUN_F_TSO6    = 0x4
+	TUN_F_TSO_ECN = 0x8
+	TUN_F_UFO     = 0x10
+)
+
+const (
+	VIRTIO_NET_HDR_F_NEEDS_CSUM = 0x1
+	VIRTIO_NET_HDR_F_DATA_VALID = 0x2
+	VIRTIO_NET_HDR_F_RSC_INFO   = 0x4
+)
+
+const (
+	VIRTIO_NET_HDR_GSO_NONE  = 0x0
+	VIRTIO_NET_HDR_GSO_TCPV4 = 0x1
+	VIRTIO_NET_HDR_GSO_UDP   = 0x3
+	VIRTIO_NET_HDR_GSO_TCPV6 = 0x4
+	VIRTIO_NET_HDR_GSO_ECN   = 0x80
+)