Update vendoring (#722)

* Update vendor github.com/beevik/ntp@v0.2.0

* Update vendor github.com/mdlayher/netlink/...

* Update vendor github.com/mdlayher/wifi/...

Adds vendor github.com/mdlayher/genetlink

* Update vendor github.com/prometheus/common/...

* Update vendor github.com/prometheus/procfs/...

* Update vendor golang.org/x/sys/unix

* Update vendor golang.org/x/sys/windows

vendor/github.com/mdlayher/genetlink/LICENSE.md

@@ -0,0 +1,10 @@
+MIT License
+===========
+
+Copyright (C) 2016-2017 Matt Layher
+
+Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

vendor/github.com/mdlayher/genetlink/README.md

@@ -0,0 +1,8 @@
+genetlink [![Build Status](https://travis-ci.org/mdlayher/genetlink.svg?branch=master)](https://travis-ci.org/mdlayher/genetlink) [![GoDoc](https://godoc.org/github.com/mdlayher/genetlink?status.svg)](https://godoc.org/github.com/mdlayher/genetlink) [![Go Report Card](https://goreportcard.com/badge/github.com/mdlayher/genetlink)](https://goreportcard.com/report/github.com/mdlayher/genetlink)
+=========
+
+Package `genetlink` implements generic netlink interactions and data types.
+MIT Licensed.
+
+For more information about how netlink and generic netlink work,
+check out my blog series on [Linux, Netlink, and Go](https://medium.com/@mdlayher/linux-netlink-and-go-part-1-netlink-4781aaeeaca8).

vendor/github.com/mdlayher/genetlink/conn.go

@@ -0,0 +1,139 @@
+package genetlink
+
+import (
+	"github.com/mdlayher/netlink"
+	"golang.org/x/net/bpf"
+)
+
+// Protocol is the netlink protocol constant used to specify generic netlink.
+const Protocol = 0x10 // unix.NETLINK_GENERIC
+
+// A Conn is a generic netlink connection.  A Conn can be used to send and
+// receive generic netlink messages to and from netlink.
+type Conn struct {
+	// Operating system-specific netlink connection.
+	c *netlink.Conn
+}
+
+// Dial dials a generic netlink connection.  Config specifies optional
+// configuration for the underlying netlink connection.  If config is
+// nil, a default configuration will be used.
+func Dial(config *netlink.Config) (*Conn, error) {
+	c, err := netlink.Dial(Protocol, config)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewConn(c), nil
+}
+
+// NewConn creates a Conn that wraps an existing *netlink.Conn for
+// generic netlink communications.
+//
+// NewConn is primarily useful for tests. Most applications should use
+// Dial instead.
+func NewConn(c *netlink.Conn) *Conn {
+	return &Conn{c: c}
+}
+
+// Close closes the connection.
+func (c *Conn) Close() error {
+	return c.c.Close()
+}
+
+// GetFamily retrieves a generic netlink family with the specified name.  If the
+// family does not exist, the error value can be checked using os.IsNotExist.
+func (c *Conn) GetFamily(name string) (Family, error) {
+	return c.getFamily(name)
+}
+
+// ListFamilies retrieves all registered generic netlink families.
+func (c *Conn) ListFamilies() ([]Family, error) {
+	return c.listFamilies()
+}
+
+// JoinGroup joins a netlink multicast group by its ID.
+func (c *Conn) JoinGroup(group uint32) error {
+	return c.c.JoinGroup(group)
+}
+
+// LeaveGroup leaves a netlink multicast group by its ID.
+func (c *Conn) LeaveGroup(group uint32) error {
+	return c.c.LeaveGroup(group)
+}
+
+// SetBPF attaches an assembled BPF program to a Conn.
+func (c *Conn) SetBPF(filter []bpf.RawInstruction) error {
+	return c.c.SetBPF(filter)
+}
+
+// Send sends a single Message to netlink, wrapping it in a netlink.Message
+// using the specified generic netlink family and flags.  On success, Send
+// returns a copy of the netlink.Message with all parameters populated, for
+// later validation.
+func (c *Conn) Send(m Message, family uint16, flags netlink.HeaderFlags) (netlink.Message, error) {
+	nm := netlink.Message{
+		Header: netlink.Header{
+			Type:  netlink.HeaderType(family),
+			Flags: flags,
+		},
+	}
+
+	mb, err := m.MarshalBinary()
+	if err != nil {
+		return netlink.Message{}, err
+	}
+	nm.Data = mb
+
+	reqnm, err := c.c.Send(nm)
+	if err != nil {
+		return netlink.Message{}, err
+	}
+
+	return reqnm, nil
+}
+
+// Receive receives one or more Messages from netlink.  The netlink.Messages
+// used to wrap each Message are available for later validation.
+func (c *Conn) Receive() ([]Message, []netlink.Message, error) {
+	msgs, err := c.c.Receive()
+	if err != nil {
+		return nil, nil, err
+	}
+
+	gmsgs := make([]Message, 0, len(msgs))
+	for _, nm := range msgs {
+		var gm Message
+		if err := (&gm).UnmarshalBinary(nm.Data); err != nil {
+			return nil, nil, err
+		}
+
+		gmsgs = append(gmsgs, gm)
+	}
+
+	return gmsgs, msgs, nil
+}
+
+// Execute sends a single Message to netlink using Conn.Send, receives one or
+// more replies using Conn.Receive, and then checks the validity of the replies
+// against the request using netlink.Validate.
+//
+// See the documentation of Conn.Send, Conn.Receive, and netlink.Validate for
+// details about each function.
+func (c *Conn) Execute(m Message, family uint16, flags netlink.HeaderFlags) ([]Message, error) {
+	req, err := c.Send(m, family, flags)
+	if err != nil {
+		return nil, err
+	}
+
+	msgs, replies, err := c.Receive()
+	if err != nil {
+		return nil, err
+	}
+
+	if err := netlink.Validate(req, replies); err != nil {
+		return nil, err
+	}
+
+	return msgs, nil
+}

vendor/github.com/mdlayher/genetlink/doc.go

@@ -0,0 +1,2 @@
+// Package genetlink implements generic netlink interactions and data types.
+package genetlink

vendor/github.com/mdlayher/genetlink/family.go

@@ -0,0 +1,17 @@
+package genetlink
+
+// A Family is a generic netlink family.
+type Family struct {
+	ID      uint16
+	Version uint8
+	Name    string
+	Groups  []MulticastGroup
+}
+
+// A MulticastGroup is a generic netlink multicast group, which can be joined
+// for notifications from generic netlink families when specific events take
+// place.
+type MulticastGroup struct {
+	ID   uint32
+	Name string
+}

vendor/github.com/mdlayher/genetlink/family_linux.go

@@ -0,0 +1,167 @@
+//+build linux
+
+package genetlink
+
+import (
+	"errors"
+	"fmt"
+	"math"
+
+	"github.com/mdlayher/netlink"
+	"github.com/mdlayher/netlink/nlenc"
+	"golang.org/x/sys/unix"
+)
+
+var (
+	// errInvalidFamilyVersion is returned when a family's version is greater
+	// than an 8-bit integer.
+	errInvalidFamilyVersion = errors.New("invalid family version attribute")
+
+	// errInvalidMulticastGroupArray is returned when a multicast group array
+	// of attributes is malformed.
+	errInvalidMulticastGroupArray = errors.New("invalid multicast group attribute array")
+)
+
+// getFamily retrieves a generic netlink family with the specified name.
+func (c *Conn) getFamily(name string) (Family, error) {
+	b, err := netlink.MarshalAttributes([]netlink.Attribute{{
+		Type: unix.CTRL_ATTR_FAMILY_NAME,
+		Data: nlenc.Bytes(name),
+	}})
+	if err != nil {
+		return Family{}, err
+	}
+
+	req := Message{
+		Header: Header{
+			Command: unix.CTRL_CMD_GETFAMILY,
+			// TODO(mdlayher): grab nlctrl version?
+			Version: 1,
+		},
+		Data: b,
+	}
+
+	msgs, err := c.Execute(req, unix.GENL_ID_CTRL, netlink.HeaderFlagsRequest)
+	if err != nil {
+		return Family{}, err
+	}
+
+	// TODO(mdlayher): consider interpreting generic netlink header values
+
+	families, err := buildFamilies(msgs)
+	if err != nil {
+		return Family{}, err
+	}
+	if len(families) != 1 {
+		// If this were to ever happen, netlink must be in a state where
+		// its answers cannot be trusted
+		panic(fmt.Sprintf("netlink returned multiple families for name: %q", name))
+	}
+
+	return families[0], nil
+}
+
+// listFamilies retrieves all registered generic netlink families.
+func (c *Conn) listFamilies() ([]Family, error) {
+	req := Message{
+		Header: Header{
+			Command: unix.CTRL_CMD_GETFAMILY,
+			// TODO(mdlayher): grab nlctrl version?
+			Version: 1,
+		},
+	}
+
+	flags := netlink.HeaderFlagsRequest | netlink.HeaderFlagsDump
+	msgs, err := c.Execute(req, unix.GENL_ID_CTRL, flags)
+	if err != nil {
+		return nil, err
+	}
+
+	return buildFamilies(msgs)
+}
+
+// buildFamilies builds a slice of Families by parsing attributes from the
+// input Messages.
+func buildFamilies(msgs []Message) ([]Family, error) {
+	families := make([]Family, 0, len(msgs))
+	for _, m := range msgs {
+		attrs, err := netlink.UnmarshalAttributes(m.Data)
+		if err != nil {
+			return nil, err
+		}
+
+		var f Family
+		if err := (&f).parseAttributes(attrs); err != nil {
+			return nil, err
+		}
+
+		families = append(families, f)
+	}
+
+	return families, nil
+}
+
+// parseAttributes parses netlink attributes into a Family's fields.
+func (f *Family) parseAttributes(attrs []netlink.Attribute) error {
+	for _, a := range attrs {
+		switch a.Type {
+		case unix.CTRL_ATTR_FAMILY_ID:
+			f.ID = nlenc.Uint16(a.Data)
+		case unix.CTRL_ATTR_FAMILY_NAME:
+			f.Name = nlenc.String(a.Data)
+		case unix.CTRL_ATTR_VERSION:
+			v := nlenc.Uint32(a.Data)
+			if v > math.MaxUint8 {
+				return errInvalidFamilyVersion
+			}
+
+			f.Version = uint8(v)
+		case unix.CTRL_ATTR_MCAST_GROUPS:
+			groups, err := parseMulticastGroups(a.Data)
+			if err != nil {
+				return err
+			}
+
+			f.Groups = groups
+		}
+	}
+
+	return nil
+}
+
+// parseMulticastGroups parses an array of multicast group nested attributes
+// into a slice of MulticastGroups.
+func parseMulticastGroups(b []byte) ([]MulticastGroup, error) {
+	attrs, err := netlink.UnmarshalAttributes(b)
+	if err != nil {
+		return nil, err
+	}
+
+	groups := make([]MulticastGroup, 0, len(attrs))
+	for i, a := range attrs {
+		// The type attribute is essentially an array index here; it starts
+		// at 1 and should increment for each new array element
+		if int(a.Type) != i+1 {
+			return nil, errInvalidMulticastGroupArray
+		}
+
+		nattrs, err := netlink.UnmarshalAttributes(a.Data)
+		if err != nil {
+			return nil, err
+		}
+
+		var g MulticastGroup
+		for _, na := range nattrs {
+			switch na.Type {
+			case unix.CTRL_ATTR_MCAST_GRP_NAME:
+				g.Name = nlenc.String(na.Data)
+			case unix.CTRL_ATTR_MCAST_GRP_ID:
+				g.ID = nlenc.Uint32(na.Data)
+			}
+		}
+
+		groups = append(groups, g)
+	}
+
+	return groups, nil
+}

vendor/github.com/mdlayher/genetlink/family_others.go

@@ -0,0 +1,25 @@
+//+build !linux
+
+package genetlink
+
+import (
+	"fmt"
+	"runtime"
+)
+
+var (
+	// errUnimplemented is returned by all functions on platforms that
+	// cannot make use of generic netlink.
+	errUnimplemented = fmt.Errorf("generic netlink not implemented on %s/%s",
+		runtime.GOOS, runtime.GOARCH)
+)
+
+// getFamily always returns an error.
+func (c *Conn) getFamily(name string) (Family, error) {
+	return Family{}, errUnimplemented
+}
+
+// listFamilies always returns an error.
+func (c *Conn) listFamilies() ([]Family, error) {
+	return nil, errUnimplemented
+}

vendor/github.com/mdlayher/genetlink/fuzz.go

@@ -0,0 +1,20 @@
+//+build gofuzz
+
+package genetlink
+
+func Fuzz(data []byte) int {
+	return fuzzMessage(data)
+}
+
+func fuzzMessage(data []byte) int {
+	var m Message
+	if err := (&m).UnmarshalBinary(data); err != nil {
+		return 0
+	}
+
+	if _, err := m.MarshalBinary(); err != nil {
+		panic(err)
+	}
+
+	return 1
+}

vendor/github.com/mdlayher/genetlink/message.go

@@ -0,0 +1,65 @@
+package genetlink
+
+import (
+	"errors"
+)
+
+var (
+	// errInvalidMessage is returned when a Message is malformed.
+	errInvalidMessage = errors.New("generic netlink message is invalid or too short")
+)
+
+// A Header is a generic netlink header.  A Header is sent and received with
+// each generic netlink message to indicate metadata regarding a Message.
+type Header struct {
+	// Command specifies a command to issue to netlink.
+	Command uint8
+
+	// Version specifies the version of a command to use.
+	Version uint8
+}
+
+// headerLen is the length of a Header.
+const headerLen = 4 // unix.GENL_HDRLEN
+
+// A Message is a generic netlink message.  It contains a Header and an
+// arbitrary byte payload, which may be decoded using information from the
+// Header.
+//
+// Data is encoded using the native endianness of the host system.  Use
+// the netlink.Uint* and netlink.PutUint* functions to encode and decode
+// integers.
+type Message struct {
+	Header Header
+	Data   []byte
+}
+
+// MarshalBinary marshals a Message into a byte slice.
+func (m Message) MarshalBinary() ([]byte, error) {
+	b := make([]byte, headerLen)
+
+	b[0] = m.Header.Command
+	b[1] = m.Header.Version
+
+	// b[2] and b[3] are padding bytes and set to zero
+
+	return append(b, m.Data...), nil
+}
+
+// UnmarshalBinary unmarshals the contents of a byte slice into a Message.
+func (m *Message) UnmarshalBinary(b []byte) error {
+	if len(b) < headerLen {
+		return errInvalidMessage
+	}
+
+	// Don't allow reserved pad bytes to be set
+	if b[2] != 0 || b[3] != 0 {
+		return errInvalidMessage
+	}
+
+	m.Header.Command = b[0]
+	m.Header.Version = b[1]
+
+	m.Data = b[4:]
+	return nil
+}