unix/linux: add TUN flags and virtio_net_hdr constants

Change-Id: I10c86c100f4db77740eff6f07d91d6489b21b6f8
GitHub-Last-Rev: 3e8d734
GitHub-Pull-Request: #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>

Author: jwhited

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
+)