unix: add SOF_TIMESTAMPING_* flags on Linux

Add the SOF_TIMESTAMPING_* flags used to request different types of
timestamping operations. In

  err := unix.SetsockoptInt(fd, unix.SOL_SOCKET, unix.SO_TIMESTAMPING, val)

val is a mask of SOF_TIMESTAMPING_* values.

See https://www.kernel.org/doc/Documentation/networking/timestamping.txt
for more information.

Fixes golang/go#28173

Change-Id: I26e964d607606f2b3cb24f66f071d11765b9696e
Reviewed-on: https://go-review.googlesource.com/c/143337
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/unix/linux/types.go b/unix/linux/types.go
index 3c29ccd..dca55a5 100644
--- a/unix/linux/types.go
+++ b/unix/linux/types.go
@@ -75,6 +75,7 @@
 #include <linux/rtc.h>
 #include <linux/blkpg.h>
 #include <linux/net_namespace.h>
+#include <linux/net_tstamp.h>
 #include <linux/if_xdp.h>
 #include <linux/ncsi.h>
 
@@ -1612,3 +1613,26 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = C.NCSI_CHANNEL_ATTR_VLAN_LIST
 	NCSI_CHANNEL_ATTR_VLAN_ID       = C.NCSI_CHANNEL_ATTR_VLAN_ID
 )
+
+// SO_TIMESTAMPING flags
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = C.SOF_TIMESTAMPING_TX_HARDWARE
+	SOF_TIMESTAMPING_TX_SOFTWARE  = C.SOF_TIMESTAMPING_TX_SOFTWARE
+	SOF_TIMESTAMPING_RX_HARDWARE  = C.SOF_TIMESTAMPING_RX_HARDWARE
+	SOF_TIMESTAMPING_RX_SOFTWARE  = C.SOF_TIMESTAMPING_RX_SOFTWARE
+	SOF_TIMESTAMPING_SOFTWARE     = C.SOF_TIMESTAMPING_SOFTWARE
+	SOF_TIMESTAMPING_SYS_HARDWARE = C.SOF_TIMESTAMPING_SYS_HARDWARE
+	SOF_TIMESTAMPING_RAW_HARDWARE = C.SOF_TIMESTAMPING_RAW_HARDWARE
+	SOF_TIMESTAMPING_OPT_ID       = C.SOF_TIMESTAMPING_OPT_ID
+	SOF_TIMESTAMPING_TX_SCHED     = C.SOF_TIMESTAMPING_TX_SCHED
+	SOF_TIMESTAMPING_TX_ACK       = C.SOF_TIMESTAMPING_TX_ACK
+	SOF_TIMESTAMPING_OPT_CMSG     = C.SOF_TIMESTAMPING_OPT_CMSG
+	SOF_TIMESTAMPING_OPT_TSONLY   = C.SOF_TIMESTAMPING_OPT_TSONLY
+	SOF_TIMESTAMPING_OPT_STATS    = C.SOF_TIMESTAMPING_OPT_STATS
+	SOF_TIMESTAMPING_OPT_PKTINFO  = C.SOF_TIMESTAMPING_OPT_PKTINFO
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = C.SOF_TIMESTAMPING_OPT_TX_SWHW
+
+	SOF_TIMESTAMPING_LAST = C.SOF_TIMESTAMPING_LAST
+	SOF_TIMESTAMPING_MASK = C.SOF_TIMESTAMPING_MASK
+)
diff --git a/unix/ztypes_linux_386.go b/unix/ztypes_linux_386.go
index 3879002..d1b1c51 100644
--- a/unix/ztypes_linux_386.go
+++ b/unix/ztypes_linux_386.go
@@ -1965,3 +1965,24 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = 0x9
 	NCSI_CHANNEL_ATTR_VLAN_ID       = 0xa
 )
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = 0x1
+	SOF_TIMESTAMPING_TX_SOFTWARE  = 0x2
+	SOF_TIMESTAMPING_RX_HARDWARE  = 0x4
+	SOF_TIMESTAMPING_RX_SOFTWARE  = 0x8
+	SOF_TIMESTAMPING_SOFTWARE     = 0x10
+	SOF_TIMESTAMPING_SYS_HARDWARE = 0x20
+	SOF_TIMESTAMPING_RAW_HARDWARE = 0x40
+	SOF_TIMESTAMPING_OPT_ID       = 0x80
+	SOF_TIMESTAMPING_TX_SCHED     = 0x100
+	SOF_TIMESTAMPING_TX_ACK       = 0x200
+	SOF_TIMESTAMPING_OPT_CMSG     = 0x400
+	SOF_TIMESTAMPING_OPT_TSONLY   = 0x800
+	SOF_TIMESTAMPING_OPT_STATS    = 0x1000
+	SOF_TIMESTAMPING_OPT_PKTINFO  = 0x2000
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = 0x4000
+
+	SOF_TIMESTAMPING_LAST = 0x4000
+	SOF_TIMESTAMPING_MASK = 0x7fff
+)
diff --git a/unix/ztypes_linux_amd64.go b/unix/ztypes_linux_amd64.go
index cbc2c7d..dc16f3f 100644
--- a/unix/ztypes_linux_amd64.go
+++ b/unix/ztypes_linux_amd64.go
@@ -1987,3 +1987,24 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = 0x9
 	NCSI_CHANNEL_ATTR_VLAN_ID       = 0xa
 )
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = 0x1
+	SOF_TIMESTAMPING_TX_SOFTWARE  = 0x2
+	SOF_TIMESTAMPING_RX_HARDWARE  = 0x4
+	SOF_TIMESTAMPING_RX_SOFTWARE  = 0x8
+	SOF_TIMESTAMPING_SOFTWARE     = 0x10
+	SOF_TIMESTAMPING_SYS_HARDWARE = 0x20
+	SOF_TIMESTAMPING_RAW_HARDWARE = 0x40
+	SOF_TIMESTAMPING_OPT_ID       = 0x80
+	SOF_TIMESTAMPING_TX_SCHED     = 0x100
+	SOF_TIMESTAMPING_TX_ACK       = 0x200
+	SOF_TIMESTAMPING_OPT_CMSG     = 0x400
+	SOF_TIMESTAMPING_OPT_TSONLY   = 0x800
+	SOF_TIMESTAMPING_OPT_STATS    = 0x1000
+	SOF_TIMESTAMPING_OPT_PKTINFO  = 0x2000
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = 0x4000
+
+	SOF_TIMESTAMPING_LAST = 0x4000
+	SOF_TIMESTAMPING_MASK = 0x7fff
+)
diff --git a/unix/ztypes_linux_arm.go b/unix/ztypes_linux_arm.go
index 6ed804f..f335ce6 100644
--- a/unix/ztypes_linux_arm.go
+++ b/unix/ztypes_linux_arm.go
@@ -1955,3 +1955,24 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = 0x9
 	NCSI_CHANNEL_ATTR_VLAN_ID       = 0xa
 )
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = 0x1
+	SOF_TIMESTAMPING_TX_SOFTWARE  = 0x2
+	SOF_TIMESTAMPING_RX_HARDWARE  = 0x4
+	SOF_TIMESTAMPING_RX_SOFTWARE  = 0x8
+	SOF_TIMESTAMPING_SOFTWARE     = 0x10
+	SOF_TIMESTAMPING_SYS_HARDWARE = 0x20
+	SOF_TIMESTAMPING_RAW_HARDWARE = 0x40
+	SOF_TIMESTAMPING_OPT_ID       = 0x80
+	SOF_TIMESTAMPING_TX_SCHED     = 0x100
+	SOF_TIMESTAMPING_TX_ACK       = 0x200
+	SOF_TIMESTAMPING_OPT_CMSG     = 0x400
+	SOF_TIMESTAMPING_OPT_TSONLY   = 0x800
+	SOF_TIMESTAMPING_OPT_STATS    = 0x1000
+	SOF_TIMESTAMPING_OPT_PKTINFO  = 0x2000
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = 0x4000
+
+	SOF_TIMESTAMPING_LAST = 0x4000
+	SOF_TIMESTAMPING_MASK = 0x7fff
+)
diff --git a/unix/ztypes_linux_arm64.go b/unix/ztypes_linux_arm64.go
index b5fe7dd..4870547 100644
--- a/unix/ztypes_linux_arm64.go
+++ b/unix/ztypes_linux_arm64.go
@@ -1966,3 +1966,24 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = 0x9
 	NCSI_CHANNEL_ATTR_VLAN_ID       = 0xa
 )
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = 0x1
+	SOF_TIMESTAMPING_TX_SOFTWARE  = 0x2
+	SOF_TIMESTAMPING_RX_HARDWARE  = 0x4
+	SOF_TIMESTAMPING_RX_SOFTWARE  = 0x8
+	SOF_TIMESTAMPING_SOFTWARE     = 0x10
+	SOF_TIMESTAMPING_SYS_HARDWARE = 0x20
+	SOF_TIMESTAMPING_RAW_HARDWARE = 0x40
+	SOF_TIMESTAMPING_OPT_ID       = 0x80
+	SOF_TIMESTAMPING_TX_SCHED     = 0x100
+	SOF_TIMESTAMPING_TX_ACK       = 0x200
+	SOF_TIMESTAMPING_OPT_CMSG     = 0x400
+	SOF_TIMESTAMPING_OPT_TSONLY   = 0x800
+	SOF_TIMESTAMPING_OPT_STATS    = 0x1000
+	SOF_TIMESTAMPING_OPT_PKTINFO  = 0x2000
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = 0x4000
+
+	SOF_TIMESTAMPING_LAST = 0x4000
+	SOF_TIMESTAMPING_MASK = 0x7fff
+)
diff --git a/unix/ztypes_linux_mips.go b/unix/ztypes_linux_mips.go
index 7379ad2..94f5ae9 100644
--- a/unix/ztypes_linux_mips.go
+++ b/unix/ztypes_linux_mips.go
@@ -1960,3 +1960,24 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = 0x9
 	NCSI_CHANNEL_ATTR_VLAN_ID       = 0xa
 )
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = 0x1
+	SOF_TIMESTAMPING_TX_SOFTWARE  = 0x2
+	SOF_TIMESTAMPING_RX_HARDWARE  = 0x4
+	SOF_TIMESTAMPING_RX_SOFTWARE  = 0x8
+	SOF_TIMESTAMPING_SOFTWARE     = 0x10
+	SOF_TIMESTAMPING_SYS_HARDWARE = 0x20
+	SOF_TIMESTAMPING_RAW_HARDWARE = 0x40
+	SOF_TIMESTAMPING_OPT_ID       = 0x80
+	SOF_TIMESTAMPING_TX_SCHED     = 0x100
+	SOF_TIMESTAMPING_TX_ACK       = 0x200
+	SOF_TIMESTAMPING_OPT_CMSG     = 0x400
+	SOF_TIMESTAMPING_OPT_TSONLY   = 0x800
+	SOF_TIMESTAMPING_OPT_STATS    = 0x1000
+	SOF_TIMESTAMPING_OPT_PKTINFO  = 0x2000
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = 0x4000
+
+	SOF_TIMESTAMPING_LAST = 0x4000
+	SOF_TIMESTAMPING_MASK = 0x7fff
+)
diff --git a/unix/ztypes_linux_mips64.go b/unix/ztypes_linux_mips64.go
index 0b131a2..f7484cf 100644
--- a/unix/ztypes_linux_mips64.go
+++ b/unix/ztypes_linux_mips64.go
@@ -1968,3 +1968,24 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = 0x9
 	NCSI_CHANNEL_ATTR_VLAN_ID       = 0xa
 )
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = 0x1
+	SOF_TIMESTAMPING_TX_SOFTWARE  = 0x2
+	SOF_TIMESTAMPING_RX_HARDWARE  = 0x4
+	SOF_TIMESTAMPING_RX_SOFTWARE  = 0x8
+	SOF_TIMESTAMPING_SOFTWARE     = 0x10
+	SOF_TIMESTAMPING_SYS_HARDWARE = 0x20
+	SOF_TIMESTAMPING_RAW_HARDWARE = 0x40
+	SOF_TIMESTAMPING_OPT_ID       = 0x80
+	SOF_TIMESTAMPING_TX_SCHED     = 0x100
+	SOF_TIMESTAMPING_TX_ACK       = 0x200
+	SOF_TIMESTAMPING_OPT_CMSG     = 0x400
+	SOF_TIMESTAMPING_OPT_TSONLY   = 0x800
+	SOF_TIMESTAMPING_OPT_STATS    = 0x1000
+	SOF_TIMESTAMPING_OPT_PKTINFO  = 0x2000
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = 0x4000
+
+	SOF_TIMESTAMPING_LAST = 0x4000
+	SOF_TIMESTAMPING_MASK = 0x7fff
+)
diff --git a/unix/ztypes_linux_mips64le.go b/unix/ztypes_linux_mips64le.go
index 9191020..22f62a6 100644
--- a/unix/ztypes_linux_mips64le.go
+++ b/unix/ztypes_linux_mips64le.go
@@ -1968,3 +1968,24 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = 0x9
 	NCSI_CHANNEL_ATTR_VLAN_ID       = 0xa
 )
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = 0x1
+	SOF_TIMESTAMPING_TX_SOFTWARE  = 0x2
+	SOF_TIMESTAMPING_RX_HARDWARE  = 0x4
+	SOF_TIMESTAMPING_RX_SOFTWARE  = 0x8
+	SOF_TIMESTAMPING_SOFTWARE     = 0x10
+	SOF_TIMESTAMPING_SYS_HARDWARE = 0x20
+	SOF_TIMESTAMPING_RAW_HARDWARE = 0x40
+	SOF_TIMESTAMPING_OPT_ID       = 0x80
+	SOF_TIMESTAMPING_TX_SCHED     = 0x100
+	SOF_TIMESTAMPING_TX_ACK       = 0x200
+	SOF_TIMESTAMPING_OPT_CMSG     = 0x400
+	SOF_TIMESTAMPING_OPT_TSONLY   = 0x800
+	SOF_TIMESTAMPING_OPT_STATS    = 0x1000
+	SOF_TIMESTAMPING_OPT_PKTINFO  = 0x2000
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = 0x4000
+
+	SOF_TIMESTAMPING_LAST = 0x4000
+	SOF_TIMESTAMPING_MASK = 0x7fff
+)
diff --git a/unix/ztypes_linux_mipsle.go b/unix/ztypes_linux_mipsle.go
index 8fcad32..43b879f 100644
--- a/unix/ztypes_linux_mipsle.go
+++ b/unix/ztypes_linux_mipsle.go
@@ -1960,3 +1960,24 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = 0x9
 	NCSI_CHANNEL_ATTR_VLAN_ID       = 0xa
 )
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = 0x1
+	SOF_TIMESTAMPING_TX_SOFTWARE  = 0x2
+	SOF_TIMESTAMPING_RX_HARDWARE  = 0x4
+	SOF_TIMESTAMPING_RX_SOFTWARE  = 0x8
+	SOF_TIMESTAMPING_SOFTWARE     = 0x10
+	SOF_TIMESTAMPING_SYS_HARDWARE = 0x20
+	SOF_TIMESTAMPING_RAW_HARDWARE = 0x40
+	SOF_TIMESTAMPING_OPT_ID       = 0x80
+	SOF_TIMESTAMPING_TX_SCHED     = 0x100
+	SOF_TIMESTAMPING_TX_ACK       = 0x200
+	SOF_TIMESTAMPING_OPT_CMSG     = 0x400
+	SOF_TIMESTAMPING_OPT_TSONLY   = 0x800
+	SOF_TIMESTAMPING_OPT_STATS    = 0x1000
+	SOF_TIMESTAMPING_OPT_PKTINFO  = 0x2000
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = 0x4000
+
+	SOF_TIMESTAMPING_LAST = 0x4000
+	SOF_TIMESTAMPING_MASK = 0x7fff
+)
diff --git a/unix/ztypes_linux_ppc64.go b/unix/ztypes_linux_ppc64.go
index a9d1b6c..b4b7007 100644
--- a/unix/ztypes_linux_ppc64.go
+++ b/unix/ztypes_linux_ppc64.go
@@ -1976,3 +1976,24 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = 0x9
 	NCSI_CHANNEL_ATTR_VLAN_ID       = 0xa
 )
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = 0x1
+	SOF_TIMESTAMPING_TX_SOFTWARE  = 0x2
+	SOF_TIMESTAMPING_RX_HARDWARE  = 0x4
+	SOF_TIMESTAMPING_RX_SOFTWARE  = 0x8
+	SOF_TIMESTAMPING_SOFTWARE     = 0x10
+	SOF_TIMESTAMPING_SYS_HARDWARE = 0x20
+	SOF_TIMESTAMPING_RAW_HARDWARE = 0x40
+	SOF_TIMESTAMPING_OPT_ID       = 0x80
+	SOF_TIMESTAMPING_TX_SCHED     = 0x100
+	SOF_TIMESTAMPING_TX_ACK       = 0x200
+	SOF_TIMESTAMPING_OPT_CMSG     = 0x400
+	SOF_TIMESTAMPING_OPT_TSONLY   = 0x800
+	SOF_TIMESTAMPING_OPT_STATS    = 0x1000
+	SOF_TIMESTAMPING_OPT_PKTINFO  = 0x2000
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = 0x4000
+
+	SOF_TIMESTAMPING_LAST = 0x4000
+	SOF_TIMESTAMPING_MASK = 0x7fff
+)
diff --git a/unix/ztypes_linux_ppc64le.go b/unix/ztypes_linux_ppc64le.go
index f0f5214..132f3af 100644
--- a/unix/ztypes_linux_ppc64le.go
+++ b/unix/ztypes_linux_ppc64le.go
@@ -1976,3 +1976,24 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = 0x9
 	NCSI_CHANNEL_ATTR_VLAN_ID       = 0xa
 )
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = 0x1
+	SOF_TIMESTAMPING_TX_SOFTWARE  = 0x2
+	SOF_TIMESTAMPING_RX_HARDWARE  = 0x4
+	SOF_TIMESTAMPING_RX_SOFTWARE  = 0x8
+	SOF_TIMESTAMPING_SOFTWARE     = 0x10
+	SOF_TIMESTAMPING_SYS_HARDWARE = 0x20
+	SOF_TIMESTAMPING_RAW_HARDWARE = 0x40
+	SOF_TIMESTAMPING_OPT_ID       = 0x80
+	SOF_TIMESTAMPING_TX_SCHED     = 0x100
+	SOF_TIMESTAMPING_TX_ACK       = 0x200
+	SOF_TIMESTAMPING_OPT_CMSG     = 0x400
+	SOF_TIMESTAMPING_OPT_TSONLY   = 0x800
+	SOF_TIMESTAMPING_OPT_STATS    = 0x1000
+	SOF_TIMESTAMPING_OPT_PKTINFO  = 0x2000
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = 0x4000
+
+	SOF_TIMESTAMPING_LAST = 0x4000
+	SOF_TIMESTAMPING_MASK = 0x7fff
+)
diff --git a/unix/ztypes_linux_riscv64.go b/unix/ztypes_linux_riscv64.go
index 09c9058..bf60bb2 100644
--- a/unix/ztypes_linux_riscv64.go
+++ b/unix/ztypes_linux_riscv64.go
@@ -1993,3 +1993,24 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = 0x9
 	NCSI_CHANNEL_ATTR_VLAN_ID       = 0xa
 )
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = 0x1
+	SOF_TIMESTAMPING_TX_SOFTWARE  = 0x2
+	SOF_TIMESTAMPING_RX_HARDWARE  = 0x4
+	SOF_TIMESTAMPING_RX_SOFTWARE  = 0x8
+	SOF_TIMESTAMPING_SOFTWARE     = 0x10
+	SOF_TIMESTAMPING_SYS_HARDWARE = 0x20
+	SOF_TIMESTAMPING_RAW_HARDWARE = 0x40
+	SOF_TIMESTAMPING_OPT_ID       = 0x80
+	SOF_TIMESTAMPING_TX_SCHED     = 0x100
+	SOF_TIMESTAMPING_TX_ACK       = 0x200
+	SOF_TIMESTAMPING_OPT_CMSG     = 0x400
+	SOF_TIMESTAMPING_OPT_TSONLY   = 0x800
+	SOF_TIMESTAMPING_OPT_STATS    = 0x1000
+	SOF_TIMESTAMPING_OPT_PKTINFO  = 0x2000
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = 0x4000
+
+	SOF_TIMESTAMPING_LAST = 0x4000
+	SOF_TIMESTAMPING_MASK = 0x7fff
+)
diff --git a/unix/ztypes_linux_s390x.go b/unix/ztypes_linux_s390x.go
index 5e86e49..88bb64c 100644
--- a/unix/ztypes_linux_s390x.go
+++ b/unix/ztypes_linux_s390x.go
@@ -1993,3 +1993,24 @@
 	NCSI_CHANNEL_ATTR_VLAN_LIST     = 0x9
 	NCSI_CHANNEL_ATTR_VLAN_ID       = 0xa
 )
+
+const (
+	SOF_TIMESTAMPING_TX_HARDWARE  = 0x1
+	SOF_TIMESTAMPING_TX_SOFTWARE  = 0x2
+	SOF_TIMESTAMPING_RX_HARDWARE  = 0x4
+	SOF_TIMESTAMPING_RX_SOFTWARE  = 0x8
+	SOF_TIMESTAMPING_SOFTWARE     = 0x10
+	SOF_TIMESTAMPING_SYS_HARDWARE = 0x20
+	SOF_TIMESTAMPING_RAW_HARDWARE = 0x40
+	SOF_TIMESTAMPING_OPT_ID       = 0x80
+	SOF_TIMESTAMPING_TX_SCHED     = 0x100
+	SOF_TIMESTAMPING_TX_ACK       = 0x200
+	SOF_TIMESTAMPING_OPT_CMSG     = 0x400
+	SOF_TIMESTAMPING_OPT_TSONLY   = 0x800
+	SOF_TIMESTAMPING_OPT_STATS    = 0x1000
+	SOF_TIMESTAMPING_OPT_PKTINFO  = 0x2000
+	SOF_TIMESTAMPING_OPT_TX_SWHW  = 0x4000
+
+	SOF_TIMESTAMPING_LAST = 0x4000
+	SOF_TIMESTAMPING_MASK = 0x7fff
+)