syscall: add routing messages support for Linux

R=rsc
CC=golang-dev
https://golang.org/cl/4515135

src/pkg/syscall/Makefile

@@ -17,24 +17,25 @@ GOFILES=\
 	ztypes_$(GOOS)_$(GOARCH).go\
 
 GOFILES_freebsd=\
+	exec_unix.go\
 	syscall_bsd.go\
 	syscall_unix.go\
-	exec_unix.go\
 
 GOFILES_darwin=\
+	exec_unix.go\
 	syscall_bsd.go\
 	syscall_unix.go\
-	exec_unix.go\
 
 GOFILES_linux=\
-	syscall_unix.go\
 	exec_unix.go\
+	netlink_linux.go\
+	syscall_unix.go\
 
 GOFILES_windows=\
-	exec_windows.go
+	exec_windows.go\
-	
+
 GOFILES_plan9=\
-	exec_plan9.go
+	exec_plan9.go\
 
 OFILES=\
 	asm_$(GOOS)_$(GOARCH).$O\

src/pkg/syscall/mkerrors.sh

@@ -37,6 +37,7 @@ includes_Linux='
 #include <linux/ptrace.h>
 #include <linux/wait.h>
 #include <net/if.h>
+#include <net/if_arp.h>
 #include <netpacket/packet.h>
 '
 
@@ -137,7 +138,7 @@ done
 		$2 ~ /^LINUX_REBOOT_CMD_/ ||
 		$2 ~ /^LINUX_REBOOT_MAGIC[12]$/ ||
 		$2 !~ "NLA_TYPE_MASK" &&
-		$2 ~ /^(NETLINK|NLM|NLMSG|NLA|IFA|RTM)_/ ||
+		$2 ~ /^(NETLINK|NLM|NLMSG|NLA|IFA|RTM|RTN|RTPROT|RTA|RTAX|RTNH|ARPHRD)_/ ||
 		$2 ~ /^SIOC/ ||
 		$2 ~ /^(IFF|NET_RT|RTM|RTF|RTV|RTA|RTAX)_/ ||
 		$2 ~ /^BIOC/ ||

src/pkg/syscall/netlink_linux.go

@@ -0,0 +1,227 @@
+// Copyright 2011 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.
+
+// Netlink sockets and messages
+
+package syscall
+
+import (
+	"unsafe"
+)
+
+// Round the length of a netlink message up to align it properly.
+func nlmAlignOf(msglen int) int {
+	return (msglen + NLMSG_ALIGNTO - 1) & ^(NLMSG_ALIGNTO - 1)
+}
+
+// Round the length of a netlink route attribute up to align it
+// properly.
+func rtaAlignOf(attrlen int) int {
+	return (attrlen + RTA_ALIGNTO - 1) & ^(RTA_ALIGNTO - 1)
+}
+
+// NetlinkRouteRequest represents the request message to receive
+// routing and link states from the kernel.
+type NetlinkRouteRequest struct {
+	Header NlMsghdr
+	Data   RtGenmsg
+}
+
+func (rr *NetlinkRouteRequest) toWireFormat() []byte {
+	b := make([]byte, rr.Header.Len)
+	b[0] = byte(rr.Header.Len)
+	b[1] = byte(rr.Header.Len >> 8)
+	b[2] = byte(rr.Header.Len >> 16)
+	b[3] = byte(rr.Header.Len >> 24)
+	b[4] = byte(rr.Header.Type)
+	b[5] = byte(rr.Header.Type >> 8)
+	b[6] = byte(rr.Header.Flags)
+	b[7] = byte(rr.Header.Flags >> 8)
+	b[8] = byte(rr.Header.Seq)
+	b[9] = byte(rr.Header.Seq >> 8)
+	b[10] = byte(rr.Header.Seq >> 16)
+	b[11] = byte(rr.Header.Seq >> 24)
+	b[12] = byte(rr.Header.Pid)
+	b[13] = byte(rr.Header.Pid >> 8)
+	b[14] = byte(rr.Header.Pid >> 16)
+	b[15] = byte(rr.Header.Pid >> 24)
+	b[16] = byte(rr.Data.Family)
+	return b
+}
+
+func newNetlinkRouteRequest(proto, seq, family int) []byte {
+	rr := &NetlinkRouteRequest{}
+	rr.Header.Len = NLMSG_HDRLEN + SizeofRtGenmsg
+	rr.Header.Type = uint16(proto)
+	rr.Header.Flags = NLM_F_DUMP | NLM_F_REQUEST
+	rr.Header.Seq = uint32(seq)
+	rr.Data.Family = uint8(family)
+	return rr.toWireFormat()
+}
+
+// NetlinkRIB returns routing information base, as known as RIB,
+// which consists of network facility information, states and
+// parameters.
+func NetlinkRIB(proto, family int) ([]byte, int) {
+	var (
+		s     int
+		e     int
+		lsanl SockaddrNetlink
+		seq   int
+		tab   []byte
+	)
+
+	s, e = Socket(AF_NETLINK, SOCK_RAW, 0)
+	if e != 0 {
+		return nil, e
+	}
+	defer Close(s)
+
+	lsanl.Family = AF_NETLINK
+	e = Bind(s, &lsanl)
+	if e != 0 {
+		return nil, e
+	}
+
+	seq++
+	wb := newNetlinkRouteRequest(proto, seq, family)
+	e = Sendto(s, wb, 0, &lsanl)
+	if e != 0 {
+		return nil, e
+	}
+
+	for {
+		var (
+			rb  []byte
+			nr  int
+			lsa Sockaddr
+		)
+
+		rb = make([]byte, Getpagesize())
+		nr, _, e = Recvfrom(s, rb, 0)
+		if e != 0 {
+			return nil, e
+		}
+		if nr < NLMSG_HDRLEN {
+			return nil, EINVAL
+		}
+		rb = rb[:nr]
+		tab = append(tab, rb...)
+
+		msgs, _ := ParseNetlinkMessage(rb)
+		for _, m := range msgs {
+			if lsa, e = Getsockname(s); e != 0 {
+				return nil, e
+			}
+			switch v := lsa.(type) {
+			case *SockaddrNetlink:
+				if m.Header.Seq != uint32(seq) || m.Header.Pid != v.Pid {
+					return nil, EINVAL
+				}
+			default:
+				return nil, EINVAL
+			}
+			if m.Header.Type == NLMSG_DONE {
+				goto done
+			}
+			if m.Header.Type == NLMSG_ERROR {
+				return nil, EINVAL
+			}
+		}
+	}
+
+done:
+	return tab, 0
+}
+
+// NetlinkMessage represents the netlink message.
+type NetlinkMessage struct {
+	Header NlMsghdr
+	Data   []byte
+}
+
+// ParseNetlinkMessage parses buf as netlink messages and returns
+// the slice containing the NetlinkMessage structs.
+func ParseNetlinkMessage(buf []byte) ([]NetlinkMessage, int) {
+	var (
+		h    *NlMsghdr
+		dbuf []byte
+		dlen int
+		e    int
+		msgs []NetlinkMessage
+	)
+
+	for len(buf) >= NLMSG_HDRLEN {
+		h, dbuf, dlen, e = netlinkMessageHeaderAndData(buf)
+		if e != 0 {
+			break
+		}
+		m := NetlinkMessage{}
+		m.Header = *h
+		m.Data = dbuf[:h.Len-NLMSG_HDRLEN]
+		msgs = append(msgs, m)
+		buf = buf[dlen:]
+	}
+
+	return msgs, e
+}
+
+func netlinkMessageHeaderAndData(buf []byte) (*NlMsghdr, []byte, int, int) {
+	h := (*NlMsghdr)(unsafe.Pointer(&buf[0]))
+	if h.Len < NLMSG_HDRLEN || int(h.Len) > len(buf) {
+		return nil, nil, 0, EINVAL
+	}
+	return h, buf[NLMSG_HDRLEN:], nlmAlignOf(int(h.Len)), 0
+}
+
+// NetlinkRouteAttr represents the netlink route attribute.
+type NetlinkRouteAttr struct {
+	Attr  RtAttr
+	Value []byte
+}
+
+// ParseNetlinkRouteAttr parses msg's payload as netlink route
+// attributes and returns the slice containing the NetlinkRouteAttr
+// structs.
+func ParseNetlinkRouteAttr(msg *NetlinkMessage) ([]NetlinkRouteAttr, int) {
+	var (
+		buf   []byte
+		a     *RtAttr
+		alen  int
+		vbuf  []byte
+		e     int
+		attrs []NetlinkRouteAttr
+	)
+
+	switch msg.Header.Type {
+	case RTM_NEWLINK:
+		buf = msg.Data[SizeofIfInfomsg:]
+	case RTM_NEWADDR:
+		buf = msg.Data[SizeofIfAddrmsg:]
+	default:
+		return nil, EINVAL
+	}
+
+	for len(buf) >= SizeofRtAttr {
+		a, vbuf, alen, e = netlinkRouteAttrAndValue(buf)
+		if e != 0 {
+			break
+		}
+		ra := NetlinkRouteAttr{}
+		ra.Attr = *a
+		ra.Value = vbuf[:a.Len-SizeofRtAttr]
+		attrs = append(attrs, ra)
+		buf = buf[alen:]
+	}
+
+	return attrs, 0
+}
+
+func netlinkRouteAttrAndValue(buf []byte) (*RtAttr, []byte, int, int) {
+	h := (*RtAttr)(unsafe.Pointer(&buf[0]))
+	if h.Len < SizeofRtAttr || int(h.Len) > len(buf) {
+		return nil, nil, 0, EINVAL
+	}
+	return h, buf[SizeofRtAttr:], rtaAlignOf(int(h.Len)), 0
+}

src/pkg/syscall/types_linux.c

@@ -165,6 +165,42 @@ enum {
 	$IFLA_NET_NS_PID = IFLA_NET_NS_PID,
 	$IFLA_IFALIAS = IFLA_IFALIAS,
 	$IFLA_MAX = IFLA_MAX,
+	$RT_SCOPE_UNIVERSE = RT_SCOPE_UNIVERSE,
+	$RT_SCOPE_SITE = RT_SCOPE_SITE,
+	$RT_SCOPE_LINK = RT_SCOPE_LINK,
+	$RT_SCOPE_HOST = RT_SCOPE_HOST,
+	$RT_SCOPE_NOWHERE = RT_SCOPE_NOWHERE,
+	$RT_TABLE_UNSPEC = RT_TABLE_UNSPEC,
+	$RT_TABLE_COMPAT = RT_TABLE_COMPAT,
+	$RT_TABLE_DEFAULT = RT_TABLE_DEFAULT,
+	$RT_TABLE_MAIN = RT_TABLE_MAIN,
+	$RT_TABLE_LOCAL = RT_TABLE_LOCAL,
+	$RT_TABLE_MAX = RT_TABLE_MAX,
+	$RTA_UNSPEC = RTA_UNSPEC,
+	$RTA_DST = RTA_DST,
+	$RTA_SRC = RTA_SRC,
+	$RTA_IIF = RTA_IIF,
+	$RTA_OIF = RTA_OIF,
+	$RTA_GATEWAY = RTA_GATEWAY,
+	$RTA_PRIORITY = RTA_PRIORITY,
+	$RTA_PREFSRC = RTA_PREFSRC,
+	$RTA_METRICS = RTA_METRICS,
+	$RTA_MULTIPATH = RTA_MULTIPATH,
+	$RTA_FLOW = RTA_FLOW,
+	$RTA_CACHEINFO = RTA_CACHEINFO,
+	$RTA_TABLE = RTA_TABLE,
+	$RTN_UNSPEC = RTN_UNSPEC,
+	$RTN_UNICAST = RTN_UNICAST,
+	$RTN_LOCAL = RTN_LOCAL,
+	$RTN_BROADCAST = RTN_BROADCAST,
+	$RTN_ANYCAST = RTN_ANYCAST,
+	$RTN_MULTICAST = RTN_MULTICAST,
+	$RTN_BLACKHOLE = RTN_BLACKHOLE,
+	$RTN_UNREACHABLE = RTN_UNREACHABLE,
+	$RTN_PROHIBIT = RTN_PROHIBIT,
+	$RTN_THROW = RTN_THROW,
+	$RTN_NAT = RTN_NAT,
+	$RTN_XRESOLVE = RTN_XRESOLVE,
 	$SizeofNlMsghdr = sizeof(struct nlmsghdr),
 	$SizeofNlMsgerr = sizeof(struct nlmsgerr),
 	$SizeofRtGenmsg = sizeof(struct rtgenmsg),
@@ -173,6 +209,7 @@ enum {
 	$SizeofIfInfomsg = sizeof(struct ifinfomsg),
 	$SizeofIfAddrmsg = sizeof(struct ifaddrmsg),
 	$SizeofRtmsg = sizeof(struct rtmsg),
+	$SizeofRtNexthop = sizeof(struct rtnexthop),
 };
 
 typedef struct nlmsghdr $NlMsghdr;
@@ -183,6 +220,7 @@ typedef struct rtattr $RtAttr;
 typedef struct ifinfomsg $IfInfomsg;
 typedef struct ifaddrmsg $IfAddrmsg;
 typedef struct rtmsg $RtMsg;
+typedef struct rtnexthop $RtNexthop;
 
 // Inotify
 

src/pkg/syscall/zerrors_linux_386.go

@@ -48,6 +48,64 @@ const (
 	AF_UNSPEC                        = 0
 	AF_WANPIPE                       = 0x19
 	AF_X25                           = 0x9
+	ARPHRD_ADAPT                     = 0x108
+	ARPHRD_APPLETLK                  = 0x8
+	ARPHRD_ARCNET                    = 0x7
+	ARPHRD_ASH                       = 0x30d
+	ARPHRD_ATM                       = 0x13
+	ARPHRD_AX25                      = 0x3
+	ARPHRD_BIF                       = 0x307
+	ARPHRD_CHAOS                     = 0x5
+	ARPHRD_CISCO                     = 0x201
+	ARPHRD_CSLIP                     = 0x101
+	ARPHRD_CSLIP6                    = 0x103
+	ARPHRD_DDCMP                     = 0x205
+	ARPHRD_DLCI                      = 0xf
+	ARPHRD_ECONET                    = 0x30e
+	ARPHRD_EETHER                    = 0x2
+	ARPHRD_ETHER                     = 0x1
+	ARPHRD_EUI64                     = 0x1b
+	ARPHRD_FCAL                      = 0x311
+	ARPHRD_FCFABRIC                  = 0x313
+	ARPHRD_FCPL                      = 0x312
+	ARPHRD_FCPP                      = 0x310
+	ARPHRD_FDDI                      = 0x306
+	ARPHRD_FRAD                      = 0x302
+	ARPHRD_HDLC                      = 0x201
+	ARPHRD_HIPPI                     = 0x30c
+	ARPHRD_HWX25                     = 0x110
+	ARPHRD_IEEE1394                  = 0x18
+	ARPHRD_IEEE802                   = 0x6
+	ARPHRD_IEEE80211                 = 0x321
+	ARPHRD_IEEE80211_PRISM           = 0x322
+	ARPHRD_IEEE80211_RADIOTAP        = 0x323
+	ARPHRD_IEEE802154                = 0x324
+	ARPHRD_IEEE802154_PHY            = 0x325
+	ARPHRD_IEEE802_TR                = 0x320
+	ARPHRD_INFINIBAND                = 0x20
+	ARPHRD_IPDDP                     = 0x309
+	ARPHRD_IPGRE                     = 0x30a
+	ARPHRD_IRDA                      = 0x30f
+	ARPHRD_LAPB                      = 0x204
+	ARPHRD_LOCALTLK                  = 0x305
+	ARPHRD_LOOPBACK                  = 0x304
+	ARPHRD_METRICOM                  = 0x17
+	ARPHRD_NETROM                    = 0
+	ARPHRD_NONE                      = 0xfffe
+	ARPHRD_PIMREG                    = 0x30b
+	ARPHRD_PPP                       = 0x200
+	ARPHRD_PRONET                    = 0x4
+	ARPHRD_RAWHDLC                   = 0x206
+	ARPHRD_ROSE                      = 0x10e
+	ARPHRD_RSRVD                     = 0x104
+	ARPHRD_SIT                       = 0x308
+	ARPHRD_SKIP                      = 0x303
+	ARPHRD_SLIP                      = 0x100
+	ARPHRD_SLIP6                     = 0x102
+	ARPHRD_TUNNEL                    = 0x300
+	ARPHRD_TUNNEL6                   = 0x301
+	ARPHRD_VOID                      = 0xffff
+	ARPHRD_X25                       = 0x10f
 	DT_BLK                           = 0x6
 	DT_CHR                           = 0x2
 	DT_DIR                           = 0x4
@@ -716,6 +774,25 @@ const (
 	RTM_SETDCB                       = 0x4f
 	RTM_SETLINK                      = 0x13
 	RTM_SETNEIGHTBL                  = 0x43
+	RTNH_ALIGNTO                     = 0x4
+	RTNH_F_DEAD                      = 0x1
+	RTNH_F_ONLINK                    = 0x4
+	RTNH_F_PERVASIVE                 = 0x2
+	RTN_MAX                          = 0xb
+	RTPROT_BIRD                      = 0xc
+	RTPROT_BOOT                      = 0x3
+	RTPROT_DHCP                      = 0x10
+	RTPROT_DNROUTED                  = 0xd
+	RTPROT_GATED                     = 0x8
+	RTPROT_KERNEL                    = 0x2
+	RTPROT_MRT                       = 0xa
+	RTPROT_NTK                       = 0xf
+	RTPROT_RA                        = 0x9
+	RTPROT_REDIRECT                  = 0x1
+	RTPROT_STATIC                    = 0x4
+	RTPROT_UNSPEC                    = 0
+	RTPROT_XORP                      = 0xe
+	RTPROT_ZEBRA                     = 0xb
 	SCM_CREDENTIALS                  = 0x2
 	SCM_RIGHTS                       = 0x1
 	SCM_TIMESTAMP                    = 0x1d

src/pkg/syscall/zerrors_linux_amd64.go

@@ -48,6 +48,64 @@ const (
 	AF_UNSPEC                        = 0
 	AF_WANPIPE                       = 0x19
 	AF_X25                           = 0x9
+	ARPHRD_ADAPT                     = 0x108
+	ARPHRD_APPLETLK                  = 0x8
+	ARPHRD_ARCNET                    = 0x7
+	ARPHRD_ASH                       = 0x30d
+	ARPHRD_ATM                       = 0x13
+	ARPHRD_AX25                      = 0x3
+	ARPHRD_BIF                       = 0x307
+	ARPHRD_CHAOS                     = 0x5
+	ARPHRD_CISCO                     = 0x201
+	ARPHRD_CSLIP                     = 0x101
+	ARPHRD_CSLIP6                    = 0x103
+	ARPHRD_DDCMP                     = 0x205
+	ARPHRD_DLCI                      = 0xf
+	ARPHRD_ECONET                    = 0x30e
+	ARPHRD_EETHER                    = 0x2
+	ARPHRD_ETHER                     = 0x1
+	ARPHRD_EUI64                     = 0x1b
+	ARPHRD_FCAL                      = 0x311
+	ARPHRD_FCFABRIC                  = 0x313
+	ARPHRD_FCPL                      = 0x312
+	ARPHRD_FCPP                      = 0x310
+	ARPHRD_FDDI                      = 0x306
+	ARPHRD_FRAD                      = 0x302
+	ARPHRD_HDLC                      = 0x201
+	ARPHRD_HIPPI                     = 0x30c
+	ARPHRD_HWX25                     = 0x110
+	ARPHRD_IEEE1394                  = 0x18
+	ARPHRD_IEEE802                   = 0x6
+	ARPHRD_IEEE80211                 = 0x321
+	ARPHRD_IEEE80211_PRISM           = 0x322
+	ARPHRD_IEEE80211_RADIOTAP        = 0x323
+	ARPHRD_IEEE802154                = 0x324
+	ARPHRD_IEEE802154_PHY            = 0x325
+	ARPHRD_IEEE802_TR                = 0x320
+	ARPHRD_INFINIBAND                = 0x20
+	ARPHRD_IPDDP                     = 0x309
+	ARPHRD_IPGRE                     = 0x30a
+	ARPHRD_IRDA                      = 0x30f
+	ARPHRD_LAPB                      = 0x204
+	ARPHRD_LOCALTLK                  = 0x305
+	ARPHRD_LOOPBACK                  = 0x304
+	ARPHRD_METRICOM                  = 0x17
+	ARPHRD_NETROM                    = 0
+	ARPHRD_NONE                      = 0xfffe
+	ARPHRD_PIMREG                    = 0x30b
+	ARPHRD_PPP                       = 0x200
+	ARPHRD_PRONET                    = 0x4
+	ARPHRD_RAWHDLC                   = 0x206
+	ARPHRD_ROSE                      = 0x10e
+	ARPHRD_RSRVD                     = 0x104
+	ARPHRD_SIT                       = 0x308
+	ARPHRD_SKIP                      = 0x303
+	ARPHRD_SLIP                      = 0x100
+	ARPHRD_SLIP6                     = 0x102
+	ARPHRD_TUNNEL                    = 0x300
+	ARPHRD_TUNNEL6                   = 0x301
+	ARPHRD_VOID                      = 0xffff
+	ARPHRD_X25                       = 0x10f
 	DT_BLK                           = 0x6
 	DT_CHR                           = 0x2
 	DT_DIR                           = 0x4
@@ -717,6 +775,25 @@ const (
 	RTM_SETDCB                       = 0x4f
 	RTM_SETLINK                      = 0x13
 	RTM_SETNEIGHTBL                  = 0x43
+	RTNH_ALIGNTO                     = 0x4
+	RTNH_F_DEAD                      = 0x1
+	RTNH_F_ONLINK                    = 0x4
+	RTNH_F_PERVASIVE                 = 0x2
+	RTN_MAX                          = 0xb
+	RTPROT_BIRD                      = 0xc
+	RTPROT_BOOT                      = 0x3
+	RTPROT_DHCP                      = 0x10
+	RTPROT_DNROUTED                  = 0xd
+	RTPROT_GATED                     = 0x8
+	RTPROT_KERNEL                    = 0x2
+	RTPROT_MRT                       = 0xa
+	RTPROT_NTK                       = 0xf
+	RTPROT_RA                        = 0x9
+	RTPROT_REDIRECT                  = 0x1
+	RTPROT_STATIC                    = 0x4
+	RTPROT_UNSPEC                    = 0
+	RTPROT_XORP                      = 0xe
+	RTPROT_ZEBRA                     = 0xb
 	SCM_CREDENTIALS                  = 0x2
 	SCM_RIGHTS                       = 0x1
 	SCM_TIMESTAMP                    = 0x1d

src/pkg/syscall/zerrors_linux_arm.go

@@ -48,6 +48,64 @@ const (
 	AF_UNSPEC                        = 0
 	AF_WANPIPE                       = 0x19
 	AF_X25                           = 0x9
+	ARPHRD_ADAPT                     = 0x108
+	ARPHRD_APPLETLK                  = 0x8
+	ARPHRD_ARCNET                    = 0x7
+	ARPHRD_ASH                       = 0x30d
+	ARPHRD_ATM                       = 0x13
+	ARPHRD_AX25                      = 0x3
+	ARPHRD_BIF                       = 0x307
+	ARPHRD_CHAOS                     = 0x5
+	ARPHRD_CISCO                     = 0x201
+	ARPHRD_CSLIP                     = 0x101
+	ARPHRD_CSLIP6                    = 0x103
+	ARPHRD_DDCMP                     = 0x205
+	ARPHRD_DLCI                      = 0xf
+	ARPHRD_ECONET                    = 0x30e
+	ARPHRD_EETHER                    = 0x2
+	ARPHRD_ETHER                     = 0x1
+	ARPHRD_EUI64                     = 0x1b
+	ARPHRD_FCAL                      = 0x311
+	ARPHRD_FCFABRIC                  = 0x313
+	ARPHRD_FCPL                      = 0x312
+	ARPHRD_FCPP                      = 0x310
+	ARPHRD_FDDI                      = 0x306
+	ARPHRD_FRAD                      = 0x302
+	ARPHRD_HDLC                      = 0x201
+	ARPHRD_HIPPI                     = 0x30c
+	ARPHRD_HWX25                     = 0x110
+	ARPHRD_IEEE1394                  = 0x18
+	ARPHRD_IEEE802                   = 0x6
+	ARPHRD_IEEE80211                 = 0x321
+	ARPHRD_IEEE80211_PRISM           = 0x322
+	ARPHRD_IEEE80211_RADIOTAP        = 0x323
+	ARPHRD_IEEE802154                = 0x324
+	ARPHRD_IEEE802154_PHY            = 0x325
+	ARPHRD_IEEE802_TR                = 0x320
+	ARPHRD_INFINIBAND                = 0x20
+	ARPHRD_IPDDP                     = 0x309
+	ARPHRD_IPGRE                     = 0x30a
+	ARPHRD_IRDA                      = 0x30f
+	ARPHRD_LAPB                      = 0x204
+	ARPHRD_LOCALTLK                  = 0x305
+	ARPHRD_LOOPBACK                  = 0x304
+	ARPHRD_METRICOM                  = 0x17
+	ARPHRD_NETROM                    = 0
+	ARPHRD_NONE                      = 0xfffe
+	ARPHRD_PIMREG                    = 0x30b
+	ARPHRD_PPP                       = 0x200
+	ARPHRD_PRONET                    = 0x4
+	ARPHRD_RAWHDLC                   = 0x206
+	ARPHRD_ROSE                      = 0x10e
+	ARPHRD_RSRVD                     = 0x104
+	ARPHRD_SIT                       = 0x308
+	ARPHRD_SKIP                      = 0x303
+	ARPHRD_SLIP                      = 0x100
+	ARPHRD_SLIP6                     = 0x102
+	ARPHRD_TUNNEL                    = 0x300
+	ARPHRD_TUNNEL6                   = 0x301
+	ARPHRD_VOID                      = 0xffff
+	ARPHRD_X25                       = 0x10f
 	DT_BLK                           = 0x6
 	DT_CHR                           = 0x2
 	DT_DIR                           = 0x4
@@ -707,6 +765,25 @@ const (
 	RTM_SETDCB                       = 0x4f
 	RTM_SETLINK                      = 0x13
 	RTM_SETNEIGHTBL                  = 0x43
+	RTNH_ALIGNTO                     = 0x4
+	RTNH_F_DEAD                      = 0x1
+	RTNH_F_ONLINK                    = 0x4
+	RTNH_F_PERVASIVE                 = 0x2
+	RTN_MAX                          = 0xb
+	RTPROT_BIRD                      = 0xc
+	RTPROT_BOOT                      = 0x3
+	RTPROT_DHCP                      = 0x10
+	RTPROT_DNROUTED                  = 0xd
+	RTPROT_GATED                     = 0x8
+	RTPROT_KERNEL                    = 0x2
+	RTPROT_MRT                       = 0xa
+	RTPROT_NTK                       = 0xf
+	RTPROT_RA                        = 0x9
+	RTPROT_REDIRECT                  = 0x1
+	RTPROT_STATIC                    = 0x4
+	RTPROT_UNSPEC                    = 0
+	RTPROT_XORP                      = 0xe
+	RTPROT_ZEBRA                     = 0xb
 	SCM_CREDENTIALS                  = 0x2
 	SCM_RIGHTS                       = 0x1
 	SCM_TIMESTAMP                    = 0x1d

src/pkg/syscall/ztypes_linux_386.go

@@ -53,6 +53,42 @@ const (
 	IFLA_NET_NS_PID         = 0x13
 	IFLA_IFALIAS            = 0x14
 	IFLA_MAX                = 0x14
+	RT_SCOPE_UNIVERSE       = 0
+	RT_SCOPE_SITE           = 0xc8
+	RT_SCOPE_LINK           = 0xfd
+	RT_SCOPE_HOST           = 0xfe
+	RT_SCOPE_NOWHERE        = 0xff
+	RT_TABLE_UNSPEC         = 0
+	RT_TABLE_COMPAT         = 0xfc
+	RT_TABLE_DEFAULT        = 0xfd
+	RT_TABLE_MAIN           = 0xfe
+	RT_TABLE_LOCAL          = 0xff
+	RT_TABLE_MAX            = 0xffffffff
+	RTA_UNSPEC              = 0
+	RTA_DST                 = 0x1
+	RTA_SRC                 = 0x2
+	RTA_IIF                 = 0x3
+	RTA_OIF                 = 0x4
+	RTA_GATEWAY             = 0x5
+	RTA_PRIORITY            = 0x6
+	RTA_PREFSRC             = 0x7
+	RTA_METRICS             = 0x8
+	RTA_MULTIPATH           = 0x9
+	RTA_FLOW                = 0xb
+	RTA_CACHEINFO           = 0xc
+	RTA_TABLE               = 0xf
+	RTN_UNSPEC              = 0
+	RTN_UNICAST             = 0x1
+	RTN_LOCAL               = 0x2
+	RTN_BROADCAST           = 0x3
+	RTN_ANYCAST             = 0x4
+	RTN_MULTICAST           = 0x5
+	RTN_BLACKHOLE           = 0x6
+	RTN_UNREACHABLE         = 0x7
+	RTN_PROHIBIT            = 0x8
+	RTN_THROW               = 0x9
+	RTN_NAT                 = 0xa
+	RTN_XRESOLVE            = 0xb
 	SizeofNlMsghdr          = 0x10
 	SizeofNlMsgerr          = 0x14
 	SizeofRtGenmsg          = 0x1
@@ -61,6 +97,7 @@ const (
 	SizeofIfInfomsg         = 0x10
 	SizeofIfAddrmsg         = 0x8
 	SizeofRtmsg             = 0xc
+	SizeofRtNexthop         = 0x8
 	SizeofInotifyEvent      = 0x10
 )
 
@@ -344,6 +381,13 @@ type RtMsg struct {
 	Flags    uint32
 }
 
+type RtNexthop struct {
+	Len     uint16
+	Flags   uint8
+	Hops    uint8
+	Ifindex int32
+}
+
 type InotifyEvent struct {
 	Wd     int32
 	Mask   uint32

src/pkg/syscall/ztypes_linux_amd64.go

@@ -53,6 +53,42 @@ const (
 	IFLA_NET_NS_PID         = 0x13
 	IFLA_IFALIAS            = 0x14
 	IFLA_MAX                = 0x14
+	RT_SCOPE_UNIVERSE       = 0
+	RT_SCOPE_SITE           = 0xc8
+	RT_SCOPE_LINK           = 0xfd
+	RT_SCOPE_HOST           = 0xfe
+	RT_SCOPE_NOWHERE        = 0xff
+	RT_TABLE_UNSPEC         = 0
+	RT_TABLE_COMPAT         = 0xfc
+	RT_TABLE_DEFAULT        = 0xfd
+	RT_TABLE_MAIN           = 0xfe
+	RT_TABLE_LOCAL          = 0xff
+	RT_TABLE_MAX            = 0xffffffff
+	RTA_UNSPEC              = 0
+	RTA_DST                 = 0x1
+	RTA_SRC                 = 0x2
+	RTA_IIF                 = 0x3
+	RTA_OIF                 = 0x4
+	RTA_GATEWAY             = 0x5
+	RTA_PRIORITY            = 0x6
+	RTA_PREFSRC             = 0x7
+	RTA_METRICS             = 0x8
+	RTA_MULTIPATH           = 0x9
+	RTA_FLOW                = 0xb
+	RTA_CACHEINFO           = 0xc
+	RTA_TABLE               = 0xf
+	RTN_UNSPEC              = 0
+	RTN_UNICAST             = 0x1
+	RTN_LOCAL               = 0x2
+	RTN_BROADCAST           = 0x3
+	RTN_ANYCAST             = 0x4
+	RTN_MULTICAST           = 0x5
+	RTN_BLACKHOLE           = 0x6
+	RTN_UNREACHABLE         = 0x7
+	RTN_PROHIBIT            = 0x8
+	RTN_THROW               = 0x9
+	RTN_NAT                 = 0xa
+	RTN_XRESOLVE            = 0xb
 	SizeofNlMsghdr          = 0x10
 	SizeofNlMsgerr          = 0x14
 	SizeofRtGenmsg          = 0x1
@@ -61,6 +97,7 @@ const (
 	SizeofIfInfomsg         = 0x10
 	SizeofIfAddrmsg         = 0x8
 	SizeofRtmsg             = 0xc
+	SizeofRtNexthop         = 0x8
 	SizeofInotifyEvent      = 0x10
 )
 
@@ -346,6 +383,13 @@ type RtMsg struct {
 	Flags    uint32
 }
 
+type RtNexthop struct {
+	Len     uint16
+	Flags   uint8
+	Hops    uint8
+	Ifindex int32
+}
+
 type InotifyEvent struct {
 	Wd     int32
 	Mask   uint32

src/pkg/syscall/ztypes_linux_arm.go

@@ -58,6 +58,42 @@ const (
 	IFLA_NET_NS_PID         = 0x13
 	IFLA_IFALIAS            = 0x14
 	IFLA_MAX                = 0x14
+	RT_SCOPE_UNIVERSE       = 0
+	RT_SCOPE_SITE           = 0xc8
+	RT_SCOPE_LINK           = 0xfd
+	RT_SCOPE_HOST           = 0xfe
+	RT_SCOPE_NOWHERE        = 0xff
+	RT_TABLE_UNSPEC         = 0
+	RT_TABLE_COMPAT         = 0xfc
+	RT_TABLE_DEFAULT        = 0xfd
+	RT_TABLE_MAIN           = 0xfe
+	RT_TABLE_LOCAL          = 0xff
+	RT_TABLE_MAX            = 0xffffffff
+	RTA_UNSPEC              = 0
+	RTA_DST                 = 0x1
+	RTA_SRC                 = 0x2
+	RTA_IIF                 = 0x3
+	RTA_OIF                 = 0x4
+	RTA_GATEWAY             = 0x5
+	RTA_PRIORITY            = 0x6
+	RTA_PREFSRC             = 0x7
+	RTA_METRICS             = 0x8
+	RTA_MULTIPATH           = 0x9
+	RTA_FLOW                = 0xb
+	RTA_CACHEINFO           = 0xc
+	RTA_TABLE               = 0xf
+	RTN_UNSPEC              = 0
+	RTN_UNICAST             = 0x1
+	RTN_LOCAL               = 0x2
+	RTN_BROADCAST           = 0x3
+	RTN_ANYCAST             = 0x4
+	RTN_MULTICAST           = 0x5
+	RTN_BLACKHOLE           = 0x6
+	RTN_UNREACHABLE         = 0x7
+	RTN_PROHIBIT            = 0x8
+	RTN_THROW               = 0x9
+	RTN_NAT                 = 0xa
+	RTN_XRESOLVE            = 0xb
 	SizeofNlMsghdr          = 0x10
 	SizeofNlMsgerr          = 0x14
 	SizeofRtGenmsg          = 0x1
@@ -66,6 +102,7 @@ const (
 	SizeofIfInfomsg         = 0x10
 	SizeofIfAddrmsg         = 0x8
 	SizeofRtmsg             = 0xc
+	SizeofRtNexthop         = 0x8
 	SizeofInotifyEvent      = 0x10
 )
 
@@ -351,6 +388,13 @@ type RtMsg struct {
 	Flags    uint32
 }
 
+type RtNexthop struct {
+	Len     uint16
+	Flags   uint8
+	Hops    uint8
+	Ifindex int32
+}
+
 type InotifyEvent struct {
 	Wd     int32
 	Mask   uint32