Revert "route: change from syscall to x/sys/unix"

This reverts CL 632816.

Reason for revert: This CL causes x/net to depend on x/sys. We have a
policy that prevents us from vendoring x/sys into std, but x/net
needs to be vendored.

Change-Id: I0fe3bc9861d559d888db6fa7febd48a201f060b8
Reviewed-on: https://go-review.googlesource.com/c/net/+/634196
Auto-Submit: Michael Knyszek <[email protected]>
Reviewed-by: Dmitri Shuralyov <[email protected]>
LUCI-TryBot-Result: Go LUCI <[email protected]>

Author: mknyszek

Diff for: route/address.go

@@ -8,8 +8,7 @@ package route
 
 import (
 	"runtime"
-
-	"golang.org/x/sys/unix"
+	"syscall"
 )
 
 // An Addr represents an address associated with packet routing.
@@ -26,7 +25,7 @@ type LinkAddr struct {
 }
 
 // Family implements the Family method of Addr interface.
-func (a *LinkAddr) Family() int { return unix.AF_LINK }
+func (a *LinkAddr) Family() int { return syscall.AF_LINK }
 
 func (a *LinkAddr) lenAndSpace() (int, int) {
 	l := 8 + len(a.Name) + len(a.Addr)
@@ -43,7 +42,7 @@ func (a *LinkAddr) marshal(b []byte) (int, error) {
 		return 0, errInvalidAddr
 	}
 	b[0] = byte(l)
-	b[1] = unix.AF_LINK
+	b[1] = syscall.AF_LINK
 	if a.Index > 0 {
 		nativeEndian.PutUint16(b[2:4], uint16(a.Index))
 	}
@@ -65,7 +64,7 @@ func parseLinkAddr(b []byte) (Addr, error) {
 	if len(b) < 8 {
 		return nil, errInvalidAddr
 	}
-	_, a, err := parseKernelLinkAddr(unix.AF_LINK, b[4:])
+	_, a, err := parseKernelLinkAddr(syscall.AF_LINK, b[4:])
 	if err != nil {
 		return nil, err
 	}
@@ -125,10 +124,10 @@ type Inet4Addr struct {
 }
 
 // Family implements the Family method of Addr interface.
-func (a *Inet4Addr) Family() int { return unix.AF_INET }
+func (a *Inet4Addr) Family() int { return syscall.AF_INET }
 
 func (a *Inet4Addr) lenAndSpace() (int, int) {
-	return unix.SizeofSockaddrInet4, roundup(unix.SizeofSockaddrInet4)
+	return sizeofSockaddrInet, roundup(sizeofSockaddrInet)
 }
 
 func (a *Inet4Addr) marshal(b []byte) (int, error) {
@@ -137,7 +136,7 @@ func (a *Inet4Addr) marshal(b []byte) (int, error) {
 		return 0, errShortBuffer
 	}
 	b[0] = byte(l)
-	b[1] = unix.AF_INET
+	b[1] = syscall.AF_INET
 	copy(b[4:8], a.IP[:])
 	return ll, nil
 }
@@ -149,10 +148,10 @@ type Inet6Addr struct {
 }
 
 // Family implements the Family method of Addr interface.
-func (a *Inet6Addr) Family() int { return unix.AF_INET6 }
+func (a *Inet6Addr) Family() int { return syscall.AF_INET6 }
 
 func (a *Inet6Addr) lenAndSpace() (int, int) {
-	return unix.SizeofSockaddrInet6, roundup(unix.SizeofSockaddrInet6)
+	return sizeofSockaddrInet6, roundup(sizeofSockaddrInet6)
 }
 
 func (a *Inet6Addr) marshal(b []byte) (int, error) {
@@ -161,7 +160,7 @@ func (a *Inet6Addr) marshal(b []byte) (int, error) {
 		return 0, errShortBuffer
 	}
 	b[0] = byte(l)
-	b[1] = unix.AF_INET6
+	b[1] = syscall.AF_INET6
 	copy(b[8:24], a.IP[:])
 	if a.ZoneID > 0 {
 		nativeEndian.PutUint32(b[24:28], uint32(a.ZoneID))
@@ -176,7 +175,7 @@ func parseInetAddr(af int, b []byte) (Addr, error) {
 		off6 = 8 // offset of in6_addr
 	)
 	switch af {
-	case unix.AF_INET:
+	case syscall.AF_INET:
 		if len(b) < (off4+1) || len(b) < int(b[0]) || b[0] == 0 {
 			return nil, errInvalidAddr
 		}
@@ -188,7 +187,7 @@ func parseInetAddr(af int, b []byte) (Addr, error) {
 		}
 		copy(a.IP[:], b[off4:n])
 		return a, nil
-	case unix.AF_INET6:
+	case syscall.AF_INET6:
 		if len(b) < (off6+1) || len(b) < int(b[0]) || b[0] == 0 {
 			return nil, errInvalidAddr
 		}
@@ -198,7 +197,7 @@ func parseInetAddr(af int, b []byte) (Addr, error) {
 			n = sockAddrLen
 		}
 		a := &Inet6Addr{}
-		if sockAddrLen == unix.SizeofSockaddrInet6 {
+		if sockAddrLen == sizeofSockaddrInet6 {
 			a.ZoneID = int(nativeEndian.Uint32(b[24:28]))
 		}
 		copy(a.IP[:], b[off6:n])
@@ -261,19 +260,19 @@ func parseKernelInetAddr(af int, b []byte) (int, Addr, error) {
 		off6 = 8 // offset of in6_addr
 	)
 	switch {
-	case b[0] == unix.SizeofSockaddrInet6:
+	case b[0] == sizeofSockaddrInet6:
 		a := &Inet6Addr{}
 		copy(a.IP[:], b[off6:off6+16])
 		return int(b[0]), a, nil
-	case af == unix.AF_INET6:
+	case af == syscall.AF_INET6:
 		a := &Inet6Addr{}
 		if l-1 < off6 {
 			copy(a.IP[:], b[1:l])
 		} else {
 			copy(a.IP[:], b[l-off6:l])
 		}
 		return int(b[0]), a, nil
-	case b[0] == unix.SizeofSockaddrInet4:
+	case b[0] == sizeofSockaddrInet:
 		a := &Inet4Addr{}
 		copy(a.IP[:], b[off4:off4+4])
 		return int(b[0]), a, nil
@@ -385,15 +384,15 @@ func marshalAddrs(b []byte, as []Addr) (uint, error) {
 }
 
 func parseAddrs(attrs uint, fn func(int, []byte) (int, Addr, error), b []byte) ([]Addr, error) {
-	var as [unix.RTAX_MAX]Addr
-	af := int(unix.AF_UNSPEC)
-	for i := uint(0); i < unix.RTAX_MAX && len(b) >= roundup(0); i++ {
+	var as [syscall.RTAX_MAX]Addr
+	af := int(syscall.AF_UNSPEC)
+	for i := uint(0); i < syscall.RTAX_MAX && len(b) >= roundup(0); i++ {
 		if attrs&(1<<i) == 0 {
 			continue
 		}
-		if i <= unix.RTAX_BRD {
+		if i <= syscall.RTAX_BRD {
 			switch b[1] {
-			case unix.AF_LINK:
+			case syscall.AF_LINK:
 				a, err := parseLinkAddr(b)
 				if err != nil {
 					return nil, err
@@ -404,7 +403,7 @@ func parseAddrs(attrs uint, fn func(int, []byte) (int, Addr, error), b []byte) (
 					return nil, errMessageTooShort
 				}
 				b = b[l:]
-			case unix.AF_INET, unix.AF_INET6:
+			case syscall.AF_INET, syscall.AF_INET6:
 				// #70528: if the sockaddrlen is 0, no address to parse inside,
 				// skip over the record.
 				if b[0] > 0 {

Diff for: route/address_darwin_test.go

@@ -6,9 +6,8 @@ package route
 
 import (
 	"reflect"
+	"syscall"
 	"testing"
-
-	"golang.org/x/sys/unix"
 )
 
 type parseAddrsOnDarwinTest struct {
@@ -20,7 +19,7 @@ type parseAddrsOnDarwinTest struct {
 
 var parseAddrsOnDarwinLittleEndianTests = []parseAddrsOnDarwinTest{
 	{
-		unix.RTA_DST | unix.RTA_GATEWAY | unix.RTA_NETMASK,
+		syscall.RTA_DST | syscall.RTA_GATEWAY | syscall.RTA_NETMASK,
 		parseKernelInetAddr,
 		[]byte{
 			0x10, 0x2, 0x0, 0x0, 0xc0, 0xa8, 0x56, 0x0,
@@ -44,7 +43,7 @@ var parseAddrsOnDarwinLittleEndianTests = []parseAddrsOnDarwinTest{
 		},
 	},
 	{
-		unix.RTA_DST | unix.RTA_GATEWAY | unix.RTA_NETMASK,
+		syscall.RTA_DST | syscall.RTA_GATEWAY | syscall.RTA_NETMASK,
 		parseKernelInetAddr,
 		[]byte{
 			0x10, 0x02, 0x00, 0x00, 0x64, 0x71, 0x00, 0x00,
@@ -70,7 +69,7 @@ var parseAddrsOnDarwinLittleEndianTests = []parseAddrsOnDarwinTest{
 	// route -n add -inet6 fd84:1b4e:6281:: -prefixlen 48 fe80::f22f:4bff:fe09:3bff%utun4319
 	// gw fe80:0000:0000:0000:f22f:4bff:fe09:3bff
 	{
-		unix.RTA_DST | unix.RTA_GATEWAY | unix.RTA_NETMASK,
+		syscall.RTA_DST | syscall.RTA_GATEWAY | syscall.RTA_NETMASK,
 		parseKernelInetAddr,
 		[]byte{
 			0x1c, 0x1e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
@@ -99,7 +98,7 @@ var parseAddrsOnDarwinLittleEndianTests = []parseAddrsOnDarwinTest{
 	},
 	// golang/go#70528, the kernel can produce addresses of length 0
 	{
-		unix.RTA_DST | unix.RTA_GATEWAY | unix.RTA_NETMASK,
+		syscall.RTA_DST | syscall.RTA_GATEWAY | syscall.RTA_NETMASK,
 		parseKernelInetAddr,
 		[]byte{
 			0x00, 0x1e, 0x00, 0x00,
@@ -125,7 +124,7 @@ var parseAddrsOnDarwinLittleEndianTests = []parseAddrsOnDarwinTest{
 	},
 	// Additional case: golang/go/issues/70528#issuecomment-2498692877
 	{
-		unix.RTA_DST | unix.RTA_GATEWAY | unix.RTA_NETMASK,
+		syscall.RTA_DST | syscall.RTA_GATEWAY | syscall.RTA_NETMASK,
 		parseKernelInetAddr,
 		[]byte{
 			0x84, 0x00, 0x05, 0x04, 0x01, 0x00, 0x00, 0x00, 0x03, 0x08, 0x00, 0x01, 0x15, 0x00, 0x00, 0x00,

Diff for: route/address_test.go

@@ -8,9 +8,8 @@ package route
 
 import (
 	"reflect"
+	"syscall"
 	"testing"
-
-	"golang.org/x/sys/unix"
 )
 
 type parseAddrsTest struct {
@@ -22,7 +21,7 @@ type parseAddrsTest struct {
 
 var parseAddrsLittleEndianTests = []parseAddrsTest{
 	{
-		unix.RTA_DST | unix.RTA_GATEWAY | unix.RTA_NETMASK | unix.RTA_BRD,
+		syscall.RTA_DST | syscall.RTA_GATEWAY | syscall.RTA_NETMASK | syscall.RTA_BRD,
 		parseKernelInetAddr,
 		[]byte{
 			0x38, 0x12, 0x0, 0x0, 0xff, 0xff, 0xff, 0x0,
@@ -59,7 +58,7 @@ var parseAddrsLittleEndianTests = []parseAddrsTest{
 		},
 	},
 	{
-		unix.RTA_NETMASK | unix.RTA_IFP | unix.RTA_IFA,
+		syscall.RTA_NETMASK | syscall.RTA_IFP | syscall.RTA_IFA,
 		parseKernelInetAddr,
 		[]byte{
 			0x7, 0x0, 0x0, 0x0, 0xff, 0xff, 0xff, 0x0,

Diff for: route/defs_darwin.go

@@ -19,8 +19,19 @@ package route
 import "C"
 
 const (
-	sizeofIfMsghdr2Darwin15 = C.sizeof_struct_if_msghdr2
-	sizeofIfData64Darwin15  = C.sizeof_struct_if_data64
+	sizeofIfMsghdrDarwin15    = C.sizeof_struct_if_msghdr
+	sizeofIfaMsghdrDarwin15   = C.sizeof_struct_ifa_msghdr
+	sizeofIfmaMsghdrDarwin15  = C.sizeof_struct_ifma_msghdr
+	sizeofIfMsghdr2Darwin15   = C.sizeof_struct_if_msghdr2
+	sizeofIfmaMsghdr2Darwin15 = C.sizeof_struct_ifma_msghdr2
+	sizeofIfDataDarwin15      = C.sizeof_struct_if_data
+	sizeofIfData64Darwin15    = C.sizeof_struct_if_data64
 
+	sizeofRtMsghdrDarwin15  = C.sizeof_struct_rt_msghdr
 	sizeofRtMsghdr2Darwin15 = C.sizeof_struct_rt_msghdr2
+	sizeofRtMetricsDarwin15 = C.sizeof_struct_rt_metrics
+
+	sizeofSockaddrStorage = C.sizeof_struct_sockaddr_storage
+	sizeofSockaddrInet    = C.sizeof_struct_sockaddr_in
+	sizeofSockaddrInet6   = C.sizeof_struct_sockaddr_in6
 )

Diff for: route/defs_dragonfly.go

@@ -0,0 +1,56 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build ignore
+
+package route
+
+/*
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <net/route.h>
+
+#include <netinet/in.h>
+
+struct ifa_msghdr_dfly4 {
+	u_short	ifam_msglen;
+	u_char	ifam_version;
+	u_char	ifam_type;
+	int	ifam_addrs;
+	int	ifam_flags;
+	u_short	ifam_index;
+	int	ifam_metric;
+};
+
+struct ifa_msghdr_dfly58 {
+	u_short	ifam_msglen;
+	u_char	ifam_version;
+	u_char	ifam_type;
+	u_short	ifam_index;
+	int	ifam_flags;
+	int	ifam_addrs;
+	int	ifam_addrflags;
+	int	ifam_metric;
+};
+*/
+import "C"
+
+const (
+	sizeofIfMsghdrDragonFlyBSD4         = C.sizeof_struct_if_msghdr
+	sizeofIfaMsghdrDragonFlyBSD4        = C.sizeof_struct_ifa_msghdr_dfly4
+	sizeofIfmaMsghdrDragonFlyBSD4       = C.sizeof_struct_ifma_msghdr
+	sizeofIfAnnouncemsghdrDragonFlyBSD4 = C.sizeof_struct_if_announcemsghdr
+
+	sizeofIfaMsghdrDragonFlyBSD58 = C.sizeof_struct_ifa_msghdr_dfly58
+
+	sizeofRtMsghdrDragonFlyBSD4  = C.sizeof_struct_rt_msghdr
+	sizeofRtMetricsDragonFlyBSD4 = C.sizeof_struct_rt_metrics
+
+	sizeofSockaddrStorage = C.sizeof_struct_sockaddr_storage
+	sizeofSockaddrInet    = C.sizeof_struct_sockaddr_in
+	sizeofSockaddrInet6   = C.sizeof_struct_sockaddr_in6
+)

Diff for: route/defs_freebsd.go

@@ -218,6 +218,12 @@ struct if_msghdr_freebsd11 {
 import "C"
 
 const (
+	sizeofIfMsghdrlFreeBSD10        = C.sizeof_struct_if_msghdrl
+	sizeofIfaMsghdrFreeBSD10        = C.sizeof_struct_ifa_msghdr
+	sizeofIfaMsghdrlFreeBSD10       = C.sizeof_struct_ifa_msghdrl
+	sizeofIfmaMsghdrFreeBSD10       = C.sizeof_struct_ifma_msghdr
+	sizeofIfAnnouncemsghdrFreeBSD10 = C.sizeof_struct_if_announcemsghdr
+
 	sizeofRtMsghdrFreeBSD10  = C.sizeof_struct_rt_msghdr
 	sizeofRtMetricsFreeBSD10 = C.sizeof_struct_rt_metrics
 
@@ -233,6 +239,12 @@ const (
 	sizeofIfDataFreeBSD10 = C.sizeof_struct_if_data_freebsd10
 	sizeofIfDataFreeBSD11 = C.sizeof_struct_if_data_freebsd11
 
+	sizeofIfMsghdrlFreeBSD10Emu        = C.sizeof_struct_if_msghdrl
+	sizeofIfaMsghdrFreeBSD10Emu        = C.sizeof_struct_ifa_msghdr
+	sizeofIfaMsghdrlFreeBSD10Emu       = C.sizeof_struct_ifa_msghdrl
+	sizeofIfmaMsghdrFreeBSD10Emu       = C.sizeof_struct_ifma_msghdr
+	sizeofIfAnnouncemsghdrFreeBSD10Emu = C.sizeof_struct_if_announcemsghdr
+
 	sizeofRtMsghdrFreeBSD10Emu  = C.sizeof_struct_rt_msghdr
 	sizeofRtMetricsFreeBSD10Emu = C.sizeof_struct_rt_metrics
 

Diff for: route/defs_netbsd.go

@@ -0,0 +1,32 @@
+// Copyright 2016 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+//go:build ignore
+
+package route
+
+/*
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+
+#include <net/if.h>
+#include <net/if_dl.h>
+#include <net/route.h>
+
+#include <netinet/in.h>
+*/
+import "C"
+
+const (
+	sizeofIfMsghdrNetBSD7         = C.sizeof_struct_if_msghdr
+	sizeofIfaMsghdrNetBSD7        = C.sizeof_struct_ifa_msghdr
+	sizeofIfAnnouncemsghdrNetBSD7 = C.sizeof_struct_if_announcemsghdr
+
+	sizeofRtMsghdrNetBSD7  = C.sizeof_struct_rt_msghdr
+	sizeofRtMetricsNetBSD7 = C.sizeof_struct_rt_metrics
+
+	sizeofSockaddrStorage = C.sizeof_struct_sockaddr_storage
+	sizeofSockaddrInet    = C.sizeof_struct_sockaddr_in
+	sizeofSockaddrInet6   = C.sizeof_struct_sockaddr_in6
+)