mirror of
https://github.com/AdguardTeam/AdGuardHome.git
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* copy dhcpv4/nclient4 package with minor enhancement
The original package can be built only on Linux.
This commit is contained in:
Simon Zolin
parent
e7bef3a448
commit
dd46cd5f36
@ -10,9 +10,9 @@ import (
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"runtime"
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"time"
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"github.com/AdguardTeam/AdGuardHome/dhcpd/nclient4"
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"github.com/AdguardTeam/golibs/log"
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"github.com/insomniacslk/dhcp/dhcpv4"
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"github.com/insomniacslk/dhcp/dhcpv4/nclient4"
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"github.com/insomniacslk/dhcp/dhcpv6"
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"github.com/insomniacslk/dhcp/dhcpv6/nclient6"
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"github.com/insomniacslk/dhcp/iana"
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584
dhcpd/nclient4/client.go
Normal file
584
dhcpd/nclient4/client.go
Normal file
@ -0,0 +1,584 @@
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// Copyright 2018 the u-root Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build go1.12
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// Package nclient4 is a small, minimum-functionality client for DHCPv4.
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//
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// It only supports the 4-way DHCPv4 Discover-Offer-Request-Ack handshake as
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// well as the Request-Ack renewal process.
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// Originally from here: github.com/insomniacslk/dhcp/dhcpv4/nclient4
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// with the difference that this package can be built on UNIX (not just Linux),
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// because github.com/mdlayher/raw package supports it.
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package nclient4
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import (
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"bytes"
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"context"
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"errors"
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"fmt"
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"log"
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"net"
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"os"
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"sync"
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"sync/atomic"
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"time"
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"github.com/insomniacslk/dhcp/dhcpv4"
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)
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const (
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defaultBufferCap = 5
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// DefaultTimeout is the default value for read-timeout if option WithTimeout is not set
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DefaultTimeout = 5 * time.Second
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// DefaultRetries is amount of retries will be done if no answer was received within read-timeout amount of time
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DefaultRetries = 3
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// MaxMessageSize is the value to be used for DHCP option "MaxMessageSize".
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MaxMessageSize = 1500
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// ClientPort is the port that DHCP clients listen on.
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ClientPort = 68
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// ServerPort is the port that DHCP servers and relay agents listen on.
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ServerPort = 67
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)
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var (
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// DefaultServers is the address of all link-local DHCP servers and
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// relay agents.
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DefaultServers = &net.UDPAddr{
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IP: net.IPv4bcast,
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Port: ServerPort,
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}
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)
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var (
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// ErrNoResponse is returned when no response packet is received.
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ErrNoResponse = errors.New("no matching response packet received")
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// ErrNoConn is returned when NewWithConn is called with nil-value as conn.
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ErrNoConn = errors.New("conn is nil")
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// ErrNoIfaceHWAddr is returned when NewWithConn is called with nil-value as ifaceHWAddr
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ErrNoIfaceHWAddr = errors.New("ifaceHWAddr is nil")
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)
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// pendingCh is a channel associated with a pending TransactionID.
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type pendingCh struct {
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// SendAndRead closes done to indicate that it wishes for no more
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// messages for this particular XID.
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done <-chan struct{}
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// ch is used by the receive loop to distribute DHCP messages.
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ch chan<- *dhcpv4.DHCPv4
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}
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// Logger is a handler which will be used to output logging messages
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type Logger interface {
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// PrintMessage print _all_ DHCP messages
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PrintMessage(prefix string, message *dhcpv4.DHCPv4)
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// Printf is use to print the rest debugging information
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Printf(format string, v ...interface{})
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}
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// EmptyLogger prints nothing
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type EmptyLogger struct{}
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// Printf is just a dummy function that does nothing
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func (e EmptyLogger) Printf(format string, v ...interface{}) {}
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// PrintMessage is just a dummy function that does nothing
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func (e EmptyLogger) PrintMessage(prefix string, message *dhcpv4.DHCPv4) {}
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// Printfer is used for actual output of the logger. For example *log.Logger is a Printfer.
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type Printfer interface {
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// Printf is the function for logging output. Arguments are handled in the manner of fmt.Printf.
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Printf(format string, v ...interface{})
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}
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// ShortSummaryLogger is a wrapper for Printfer to implement interface Logger.
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// DHCP messages are printed in the short format.
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type ShortSummaryLogger struct {
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// Printfer is used for actual output of the logger
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Printfer
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}
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// Printf prints a log message as-is via predefined Printfer
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func (s ShortSummaryLogger) Printf(format string, v ...interface{}) {
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s.Printfer.Printf(format, v...)
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}
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// PrintMessage prints a DHCP message in the short format via predefined Printfer
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func (s ShortSummaryLogger) PrintMessage(prefix string, message *dhcpv4.DHCPv4) {
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s.Printf("%s: %s", prefix, message)
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}
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// DebugLogger is a wrapper for Printfer to implement interface Logger.
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// DHCP messages are printed in the long format.
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type DebugLogger struct {
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// Printfer is used for actual output of the logger
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Printfer
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}
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// Printf prints a log message as-is via predefined Printfer
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func (d DebugLogger) Printf(format string, v ...interface{}) {
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d.Printfer.Printf(format, v...)
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}
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// PrintMessage prints a DHCP message in the long format via predefined Printfer
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func (d DebugLogger) PrintMessage(prefix string, message *dhcpv4.DHCPv4) {
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d.Printf("%s: %s", prefix, message.Summary())
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}
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// Client is an IPv4 DHCP client.
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type Client struct {
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ifaceHWAddr net.HardwareAddr
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conn net.PacketConn
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timeout time.Duration
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retry int
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logger Logger
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// bufferCap is the channel capacity for each TransactionID.
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bufferCap int
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// serverAddr is the UDP address to send all packets to.
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//
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// This may be an actual broadcast address, or a unicast address.
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serverAddr *net.UDPAddr
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// closed is an atomic bool set to 1 when done is closed.
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closed uint32
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// done is closed to unblock the receive loop.
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done chan struct{}
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// wg protects any spawned goroutines, namely the receiveLoop.
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wg sync.WaitGroup
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pendingMu sync.Mutex
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// pending stores the distribution channels for each pending
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// TransactionID. receiveLoop uses this map to determine which channel
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// to send a new DHCP message to.
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pending map[dhcpv4.TransactionID]*pendingCh
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}
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// New returns a client usable with an unconfigured interface.
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func New(iface string, opts ...ClientOpt) (*Client, error) {
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return new(iface, nil, nil, opts...)
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}
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// NewWithConn creates a new DHCP client that sends and receives packets on the
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// given interface.
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func NewWithConn(conn net.PacketConn, ifaceHWAddr net.HardwareAddr, opts ...ClientOpt) (*Client, error) {
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return new(``, conn, ifaceHWAddr, opts...)
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}
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func new(iface string, conn net.PacketConn, ifaceHWAddr net.HardwareAddr, opts ...ClientOpt) (*Client, error) {
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c := &Client{
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ifaceHWAddr: ifaceHWAddr,
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timeout: DefaultTimeout,
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retry: DefaultRetries,
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serverAddr: DefaultServers,
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bufferCap: defaultBufferCap,
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conn: conn,
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logger: EmptyLogger{},
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done: make(chan struct{}),
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pending: make(map[dhcpv4.TransactionID]*pendingCh),
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}
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for _, opt := range opts {
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err := opt(c)
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if err != nil {
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return nil, fmt.Errorf("unable to apply option: %w", err)
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}
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}
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if c.ifaceHWAddr == nil {
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if iface == `` {
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return nil, ErrNoIfaceHWAddr
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}
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i, err := net.InterfaceByName(iface)
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if err != nil {
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return nil, fmt.Errorf("unable to get interface information: %w", err)
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}
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c.ifaceHWAddr = i.HardwareAddr
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}
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if c.conn == nil {
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var err error
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if iface == `` {
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return nil, ErrNoConn
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}
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c.conn, err = NewRawUDPConn(iface, ClientPort) // broadcast
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if err != nil {
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return nil, fmt.Errorf("unable to open a broadcasting socket: %w", err)
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}
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}
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c.wg.Add(1)
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go c.receiveLoop()
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return c, nil
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}
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// Close closes the underlying connection.
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func (c *Client) Close() error {
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// Make sure not to close done twice.
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if !atomic.CompareAndSwapUint32(&c.closed, 0, 1) {
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return nil
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}
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err := c.conn.Close()
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// Closing c.done sets off a chain reaction:
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//
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// Any SendAndRead unblocks trying to receive more messages, which
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// means rem() gets called.
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//
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// rem() should be unblocking receiveLoop if it is blocked.
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//
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// receiveLoop should then exit gracefully.
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close(c.done)
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// Wait for receiveLoop to stop.
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c.wg.Wait()
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return err
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}
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func (c *Client) isClosed() bool {
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return atomic.LoadUint32(&c.closed) != 0
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}
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func (c *Client) receiveLoop() {
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defer c.wg.Done()
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for {
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// TODO: Clients can send a "max packet size" option in their
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// packets, IIRC. Choose a reasonable size and set it.
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b := make([]byte, MaxMessageSize)
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n, _, err := c.conn.ReadFrom(b)
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if err != nil {
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if !c.isClosed() {
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c.logger.Printf("error reading from UDP connection: %v", err)
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}
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return
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}
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msg, err := dhcpv4.FromBytes(b[:n])
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if err != nil {
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// Not a valid DHCP packet; keep listening.
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continue
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}
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if msg.OpCode != dhcpv4.OpcodeBootReply {
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// Not a response message.
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continue
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}
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// This is a somewhat non-standard check, by the looks
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// of RFC 2131. It should work as long as the DHCP
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// server is spec-compliant for the HWAddr field.
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if c.ifaceHWAddr != nil && !bytes.Equal(c.ifaceHWAddr, msg.ClientHWAddr) {
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// Not for us.
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continue
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}
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c.pendingMu.Lock()
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p, ok := c.pending[msg.TransactionID]
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if ok {
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select {
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case <-p.done:
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close(p.ch)
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delete(c.pending, msg.TransactionID)
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// This send may block.
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case p.ch <- msg:
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}
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}
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c.pendingMu.Unlock()
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}
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}
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// ClientOpt is a function that configures the Client.
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type ClientOpt func(c *Client) error
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// WithTimeout configures the retransmission timeout.
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//
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// Default is 5 seconds.
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func WithTimeout(d time.Duration) ClientOpt {
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return func(c *Client) (err error) {
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c.timeout = d
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return
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}
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}
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// WithSummaryLogger logs one-line DHCPv4 message summaries when sent & received.
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func WithSummaryLogger() ClientOpt {
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return func(c *Client) (err error) {
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c.logger = ShortSummaryLogger{
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Printfer: log.New(os.Stderr, "[dhcpv4] ", log.LstdFlags),
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}
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return
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}
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}
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// WithDebugLogger logs multi-line full DHCPv4 messages when sent & received.
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func WithDebugLogger() ClientOpt {
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return func(c *Client) (err error) {
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c.logger = DebugLogger{
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Printfer: log.New(os.Stderr, "[dhcpv4] ", log.LstdFlags),
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}
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return
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}
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}
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// WithLogger set the logger (see interface Logger).
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func WithLogger(newLogger Logger) ClientOpt {
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return func(c *Client) (err error) {
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c.logger = newLogger
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return
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}
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}
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// WithUnicast forces client to send messages as unicast frames.
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// By default client sends messages as broadcast frames even if server address is defined.
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//
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// srcAddr is both:
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// * The source address of outgoing frames.
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// * The address to be listened for incoming frames.
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func WithUnicast(srcAddr *net.UDPAddr) ClientOpt {
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return func(c *Client) (err error) {
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if srcAddr == nil {
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srcAddr = &net.UDPAddr{Port: ServerPort}
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}
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c.conn, err = net.ListenUDP("udp4", srcAddr)
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if err != nil {
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err = fmt.Errorf("unable to start listening UDP port: %w", err)
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}
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return
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}
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}
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// WithHWAddr tells to the Client to receive messages destinated to selected
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// hardware address
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func WithHWAddr(hwAddr net.HardwareAddr) ClientOpt {
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return func(c *Client) (err error) {
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c.ifaceHWAddr = hwAddr
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return
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}
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}
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func withBufferCap(n int) ClientOpt {
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return func(c *Client) (err error) {
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c.bufferCap = n
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return
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}
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}
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// WithRetry configures the number of retransmissions to attempt.
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//
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// Default is 3.
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func WithRetry(r int) ClientOpt {
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return func(c *Client) (err error) {
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c.retry = r
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return
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}
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}
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// WithServerAddr configures the address to send messages to.
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func WithServerAddr(n *net.UDPAddr) ClientOpt {
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return func(c *Client) (err error) {
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c.serverAddr = n
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return
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}
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}
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// Matcher matches DHCP packets.
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type Matcher func(*dhcpv4.DHCPv4) bool
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// IsMessageType returns a matcher that checks for the message type.
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//
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// If t is MessageTypeNone, all packets are matched.
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func IsMessageType(t dhcpv4.MessageType) Matcher {
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return func(p *dhcpv4.DHCPv4) bool {
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return p.MessageType() == t || t == dhcpv4.MessageTypeNone
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}
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}
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// DiscoverOffer sends a DHCPDiscover message and returns the first valid offer
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// received.
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func (c *Client) DiscoverOffer(ctx context.Context, modifiers ...dhcpv4.Modifier) (offer *dhcpv4.DHCPv4, err error) {
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// RFC 2131, Section 4.4.1, Table 5 details what a DISCOVER packet should
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// contain.
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discover, err := dhcpv4.NewDiscovery(c.ifaceHWAddr, dhcpv4.PrependModifiers(modifiers,
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dhcpv4.WithOption(dhcpv4.OptMaxMessageSize(MaxMessageSize)))...)
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if err != nil {
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err = fmt.Errorf("unable to create a discovery request: %w", err)
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return
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}
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offer, err = c.SendAndRead(ctx, c.serverAddr, discover, IsMessageType(dhcpv4.MessageTypeOffer))
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if err != nil {
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err = fmt.Errorf("got an error while the discovery request: %w", err)
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return
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}
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return
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}
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// Request completes the 4-way Discover-Offer-Request-Ack handshake.
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//
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// Note that modifiers will be applied *both* to Discover and Request packets.
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func (c *Client) Request(ctx context.Context, modifiers ...dhcpv4.Modifier) (offer, ack *dhcpv4.DHCPv4, err error) {
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offer, err = c.DiscoverOffer(ctx, modifiers...)
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if err != nil {
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err = fmt.Errorf("unable to receive an offer: %w", err)
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return
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}
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// TODO(chrisko): should this be unicast to the server?
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request, err := dhcpv4.NewRequestFromOffer(offer, dhcpv4.PrependModifiers(modifiers,
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dhcpv4.WithOption(dhcpv4.OptMaxMessageSize(MaxMessageSize)))...)
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if err != nil {
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err = fmt.Errorf("unable to create a request: %w", err)
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return
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}
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ack, err = c.SendAndRead(ctx, c.serverAddr, request, nil)
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if err != nil {
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err = fmt.Errorf("got an error while processing the request: %w", err)
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return
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}
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return
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}
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// ErrTransactionIDInUse is returned if there were an attempt to send a message
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// with the same TransactionID as we are already waiting an answer for.
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type ErrTransactionIDInUse struct {
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// TransactionID is the transaction ID of the message which the error is related to.
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TransactionID dhcpv4.TransactionID
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}
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// Error is just the method to comply interface "error".
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func (err *ErrTransactionIDInUse) Error() string {
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return fmt.Sprintf("transaction ID %s already in use", err.TransactionID)
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}
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// send sends p to destination and returns a response channel.
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//
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// Responses will be matched by transaction ID and ClientHWAddr.
|
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//
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// The returned lambda function must be called after all desired responses have
|
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// been received in order to return the Transaction ID to the usable pool.
|
||||
func (c *Client) send(dest *net.UDPAddr, msg *dhcpv4.DHCPv4) (resp <-chan *dhcpv4.DHCPv4, cancel func(), err error) {
|
||||
c.pendingMu.Lock()
|
||||
if _, ok := c.pending[msg.TransactionID]; ok {
|
||||
c.pendingMu.Unlock()
|
||||
return nil, nil, &ErrTransactionIDInUse{msg.TransactionID}
|
||||
}
|
||||
|
||||
ch := make(chan *dhcpv4.DHCPv4, c.bufferCap)
|
||||
done := make(chan struct{})
|
||||
c.pending[msg.TransactionID] = &pendingCh{done: done, ch: ch}
|
||||
c.pendingMu.Unlock()
|
||||
|
||||
cancel = func() {
|
||||
// Why can't we just close ch here?
|
||||
//
|
||||
// Because receiveLoop may potentially be blocked trying to
|
||||
// send on ch. We gotta unblock it first, and then we can take
|
||||
// the lock and remove the XID from the pending transaction
|
||||
// map.
|
||||
close(done)
|
||||
|
||||
c.pendingMu.Lock()
|
||||
if p, ok := c.pending[msg.TransactionID]; ok {
|
||||
close(p.ch)
|
||||
delete(c.pending, msg.TransactionID)
|
||||
}
|
||||
c.pendingMu.Unlock()
|
||||
}
|
||||
|
||||
if _, err := c.conn.WriteTo(msg.ToBytes(), dest); err != nil {
|
||||
cancel()
|
||||
return nil, nil, fmt.Errorf("error writing packet to connection: %w", err)
|
||||
}
|
||||
return ch, cancel, nil
|
||||
}
|
||||
|
||||
// This error should never be visible to users.
|
||||
// It is used only to increase the timeout in retryFn.
|
||||
var errDeadlineExceeded = errors.New("INTERNAL ERROR: deadline exceeded")
|
||||
|
||||
// SendAndRead sends a packet p to a destination dest and waits for the first
|
||||
// response matching `match` as well as its Transaction ID and ClientHWAddr.
|
||||
//
|
||||
// If match is nil, the first packet matching the Transaction ID and
|
||||
// ClientHWAddr is returned.
|
||||
func (c *Client) SendAndRead(ctx context.Context, dest *net.UDPAddr, p *dhcpv4.DHCPv4, match Matcher) (*dhcpv4.DHCPv4, error) {
|
||||
var response *dhcpv4.DHCPv4
|
||||
err := c.retryFn(func(timeout time.Duration) error {
|
||||
ch, rem, err := c.send(dest, p)
|
||||
if err != nil {
|
||||
return err
|
||||
}
|
||||
c.logger.PrintMessage("sent message", p)
|
||||
defer rem()
|
||||
|
||||
for {
|
||||
select {
|
||||
case <-c.done:
|
||||
return ErrNoResponse
|
||||
|
||||
case <-time.After(timeout):
|
||||
return errDeadlineExceeded
|
||||
|
||||
case <-ctx.Done():
|
||||
return ctx.Err()
|
||||
|
||||
case packet := <-ch:
|
||||
if match == nil || match(packet) {
|
||||
c.logger.PrintMessage("received message", packet)
|
||||
response = packet
|
||||
return nil
|
||||
}
|
||||
}
|
||||
}
|
||||
})
|
||||
if err == errDeadlineExceeded {
|
||||
return nil, ErrNoResponse
|
||||
}
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return response, nil
|
||||
}
|
||||
|
||||
func (c *Client) retryFn(fn func(timeout time.Duration) error) error {
|
||||
timeout := c.timeout
|
||||
|
||||
// Each retry takes the amount of timeout at worst.
|
||||
for i := 0; i < c.retry || c.retry < 0; i++ { // TODO: why is this called "retry" if this is "tries" ("retries"+1)?
|
||||
switch err := fn(timeout); err {
|
||||
case nil:
|
||||
// Got it!
|
||||
return nil
|
||||
|
||||
case errDeadlineExceeded:
|
||||
// Double timeout, then retry.
|
||||
timeout *= 2
|
||||
|
||||
default:
|
||||
return err
|
||||
}
|
||||
}
|
||||
|
||||
return errDeadlineExceeded
|
||||
}
|
||||
333
dhcpd/nclient4/client_test.go
Normal file
333
dhcpd/nclient4/client_test.go
Normal file
@ -0,0 +1,333 @@
|
||||
// Copyright 2018 the u-root Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build linux
|
||||
// github.com/hugelgupf/socketpair is Linux-only
|
||||
// +build go1.12
|
||||
|
||||
package nclient4
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"context"
|
||||
"fmt"
|
||||
"net"
|
||||
"sync"
|
||||
"testing"
|
||||
"time"
|
||||
|
||||
"github.com/hugelgupf/socketpair"
|
||||
"github.com/insomniacslk/dhcp/dhcpv4"
|
||||
"github.com/insomniacslk/dhcp/dhcpv4/server4"
|
||||
)
|
||||
|
||||
type handler struct {
|
||||
mu sync.Mutex
|
||||
received []*dhcpv4.DHCPv4
|
||||
|
||||
// Each received packet can have more than one response (in theory,
|
||||
// from different servers sending different Advertise, for example).
|
||||
responses [][]*dhcpv4.DHCPv4
|
||||
}
|
||||
|
||||
func (h *handler) handle(conn net.PacketConn, peer net.Addr, m *dhcpv4.DHCPv4) {
|
||||
h.mu.Lock()
|
||||
defer h.mu.Unlock()
|
||||
|
||||
h.received = append(h.received, m)
|
||||
|
||||
if len(h.responses) > 0 {
|
||||
for _, resp := range h.responses[0] {
|
||||
_, _ = conn.WriteTo(resp.ToBytes(), peer)
|
||||
}
|
||||
h.responses = h.responses[1:]
|
||||
}
|
||||
}
|
||||
|
||||
func serveAndClient(ctx context.Context, responses [][]*dhcpv4.DHCPv4, opts ...ClientOpt) (*Client, net.PacketConn) {
|
||||
// Fake PacketConn connection.
|
||||
clientRawConn, serverRawConn, err := socketpair.PacketSocketPair()
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
clientConn := NewBroadcastUDPConn(clientRawConn, &net.UDPAddr{Port: ClientPort})
|
||||
serverConn := NewBroadcastUDPConn(serverRawConn, &net.UDPAddr{Port: ServerPort})
|
||||
|
||||
o := []ClientOpt{WithRetry(1), WithTimeout(2 * time.Second)}
|
||||
o = append(o, opts...)
|
||||
mc, err := NewWithConn(clientConn, net.HardwareAddr{0xa, 0xb, 0xc, 0xd, 0xe, 0xf}, o...)
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
|
||||
h := &handler{responses: responses}
|
||||
s, err := server4.NewServer("", nil, h.handle, server4.WithConn(serverConn))
|
||||
if err != nil {
|
||||
panic(err)
|
||||
}
|
||||
go func() {
|
||||
_ = s.Serve()
|
||||
}()
|
||||
|
||||
return mc, serverConn
|
||||
}
|
||||
|
||||
func ComparePacket(got *dhcpv4.DHCPv4, want *dhcpv4.DHCPv4) error {
|
||||
if got == nil && got == want {
|
||||
return nil
|
||||
}
|
||||
if (want == nil || got == nil) && (got != want) {
|
||||
return fmt.Errorf("packet got %v, want %v", got, want)
|
||||
}
|
||||
if !bytes.Equal(got.ToBytes(), want.ToBytes()) {
|
||||
return fmt.Errorf("packet got %v, want %v", got, want)
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func pktsExpected(got []*dhcpv4.DHCPv4, want []*dhcpv4.DHCPv4) error {
|
||||
if len(got) != len(want) {
|
||||
return fmt.Errorf("got %d packets, want %d packets", len(got), len(want))
|
||||
}
|
||||
|
||||
for i := range got {
|
||||
if err := ComparePacket(got[i], want[i]); err != nil {
|
||||
return err
|
||||
}
|
||||
}
|
||||
return nil
|
||||
}
|
||||
|
||||
func newPacketWeirdHWAddr(op dhcpv4.OpcodeType, xid dhcpv4.TransactionID) *dhcpv4.DHCPv4 {
|
||||
p, err := dhcpv4.New()
|
||||
if err != nil {
|
||||
panic(fmt.Sprintf("newpacket: %v", err))
|
||||
}
|
||||
p.OpCode = op
|
||||
p.TransactionID = xid
|
||||
p.ClientHWAddr = net.HardwareAddr{0xa, 0xb, 0xc, 0xd, 0xe, 0xf, 1, 2, 3, 4, 5, 6}
|
||||
return p
|
||||
}
|
||||
|
||||
func newPacket(op dhcpv4.OpcodeType, xid dhcpv4.TransactionID) *dhcpv4.DHCPv4 {
|
||||
p, err := dhcpv4.New()
|
||||
if err != nil {
|
||||
panic(fmt.Sprintf("newpacket: %v", err))
|
||||
}
|
||||
p.OpCode = op
|
||||
p.TransactionID = xid
|
||||
p.ClientHWAddr = net.HardwareAddr{0xa, 0xb, 0xc, 0xd, 0xe, 0xf}
|
||||
return p
|
||||
}
|
||||
|
||||
func TestSendAndRead(t *testing.T) {
|
||||
for _, tt := range []struct {
|
||||
desc string
|
||||
send *dhcpv4.DHCPv4
|
||||
server []*dhcpv4.DHCPv4
|
||||
|
||||
// If want is nil, we assume server[0] contains what is wanted.
|
||||
want *dhcpv4.DHCPv4
|
||||
wantErr error
|
||||
}{
|
||||
{
|
||||
desc: "two response packets",
|
||||
send: newPacket(dhcpv4.OpcodeBootRequest, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
server: []*dhcpv4.DHCPv4{
|
||||
newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
},
|
||||
want: newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
},
|
||||
{
|
||||
desc: "one response packet",
|
||||
send: newPacket(dhcpv4.OpcodeBootRequest, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
server: []*dhcpv4.DHCPv4{
|
||||
newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
},
|
||||
want: newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
},
|
||||
{
|
||||
desc: "one response packet, one invalid XID, one invalid opcode, one invalid hwaddr",
|
||||
send: newPacket(dhcpv4.OpcodeBootRequest, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
server: []*dhcpv4.DHCPv4{
|
||||
newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x77, 0x33, 0x33, 0x33}),
|
||||
newPacket(dhcpv4.OpcodeBootRequest, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
newPacketWeirdHWAddr(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
},
|
||||
want: newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
},
|
||||
{
|
||||
desc: "discard wrong XID",
|
||||
send: newPacket(dhcpv4.OpcodeBootRequest, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
server: []*dhcpv4.DHCPv4{
|
||||
newPacket(dhcpv4.OpcodeBootReply, [4]byte{0, 0, 0, 0}),
|
||||
},
|
||||
want: nil, // Explicitly empty.
|
||||
wantErr: ErrNoResponse,
|
||||
},
|
||||
{
|
||||
desc: "no response, timeout",
|
||||
send: newPacket(dhcpv4.OpcodeBootRequest, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
wantErr: ErrNoResponse,
|
||||
},
|
||||
} {
|
||||
t.Run(tt.desc, func(t *testing.T) {
|
||||
// Both server and client only get 2 seconds.
|
||||
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
||||
defer cancel()
|
||||
|
||||
mc, _ := serveAndClient(ctx, [][]*dhcpv4.DHCPv4{tt.server},
|
||||
// Use an unbuffered channel to make sure we
|
||||
// have no deadlocks.
|
||||
withBufferCap(0))
|
||||
defer mc.Close()
|
||||
|
||||
rcvd, err := mc.SendAndRead(context.Background(), DefaultServers, tt.send, nil)
|
||||
if err != tt.wantErr {
|
||||
t.Error(err)
|
||||
}
|
||||
|
||||
if err := ComparePacket(rcvd, tt.want); err != nil {
|
||||
t.Errorf("got unexpected packets: %v", err)
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
func TestParallelSendAndRead(t *testing.T) {
|
||||
pkt := newPacket(dhcpv4.OpcodeBootRequest, [4]byte{0x33, 0x33, 0x33, 0x33})
|
||||
|
||||
// Both the server and client only get 2 seconds.
|
||||
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
||||
defer cancel()
|
||||
|
||||
mc, _ := serveAndClient(ctx, [][]*dhcpv4.DHCPv4{},
|
||||
WithTimeout(10*time.Second),
|
||||
// Use an unbuffered channel to make sure nothing blocks.
|
||||
withBufferCap(0))
|
||||
defer mc.Close()
|
||||
|
||||
var wg sync.WaitGroup
|
||||
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
if _, err := mc.SendAndRead(context.Background(), DefaultServers, pkt, nil); err != ErrNoResponse {
|
||||
t.Errorf("SendAndRead(%v) = %v, want %v", pkt, err, ErrNoResponse)
|
||||
}
|
||||
}()
|
||||
|
||||
wg.Add(1)
|
||||
go func() {
|
||||
defer wg.Done()
|
||||
|
||||
time.Sleep(4 * time.Second)
|
||||
|
||||
if err := mc.Close(); err != nil {
|
||||
t.Errorf("closing failed: %v", err)
|
||||
}
|
||||
}()
|
||||
|
||||
wg.Wait()
|
||||
}
|
||||
|
||||
func TestReuseXID(t *testing.T) {
|
||||
pkt := newPacket(dhcpv4.OpcodeBootRequest, [4]byte{0x33, 0x33, 0x33, 0x33})
|
||||
|
||||
// Both the server and client only get 2 seconds.
|
||||
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
||||
defer cancel()
|
||||
|
||||
mc, _ := serveAndClient(ctx, [][]*dhcpv4.DHCPv4{})
|
||||
defer mc.Close()
|
||||
|
||||
if _, err := mc.SendAndRead(context.Background(), DefaultServers, pkt, nil); err != ErrNoResponse {
|
||||
t.Errorf("SendAndRead(%v) = %v, want %v", pkt, err, ErrNoResponse)
|
||||
}
|
||||
|
||||
if _, err := mc.SendAndRead(context.Background(), DefaultServers, pkt, nil); err != ErrNoResponse {
|
||||
t.Errorf("SendAndRead(%v) = %v, want %v", pkt, err, ErrNoResponse)
|
||||
}
|
||||
}
|
||||
|
||||
func TestSimpleSendAndReadDiscardGarbage(t *testing.T) {
|
||||
pkt := newPacket(dhcpv4.OpcodeBootRequest, [4]byte{0x33, 0x33, 0x33, 0x33})
|
||||
|
||||
responses := newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33})
|
||||
|
||||
// Both the server and client only get 2 seconds.
|
||||
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
||||
defer cancel()
|
||||
|
||||
mc, udpConn := serveAndClient(ctx, [][]*dhcpv4.DHCPv4{{responses}})
|
||||
defer mc.Close()
|
||||
|
||||
// Too short for valid DHCPv4 packet.
|
||||
_, _ = udpConn.WriteTo([]byte{0x01}, nil)
|
||||
_, _ = udpConn.WriteTo([]byte{0x01, 0x2}, nil)
|
||||
|
||||
rcvd, err := mc.SendAndRead(ctx, DefaultServers, pkt, nil)
|
||||
if err != nil {
|
||||
t.Errorf("SendAndRead(%v) = %v, want nil", pkt, err)
|
||||
}
|
||||
|
||||
if err := ComparePacket(rcvd, responses); err != nil {
|
||||
t.Errorf("got unexpected packets: %v", err)
|
||||
}
|
||||
}
|
||||
|
||||
func TestMultipleSendAndRead(t *testing.T) {
|
||||
for _, tt := range []struct {
|
||||
desc string
|
||||
send []*dhcpv4.DHCPv4
|
||||
server [][]*dhcpv4.DHCPv4
|
||||
wantErr []error
|
||||
}{
|
||||
{
|
||||
desc: "two requests, two responses",
|
||||
send: []*dhcpv4.DHCPv4{
|
||||
newPacket(dhcpv4.OpcodeBootRequest, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
newPacket(dhcpv4.OpcodeBootRequest, [4]byte{0x44, 0x44, 0x44, 0x44}),
|
||||
},
|
||||
server: [][]*dhcpv4.DHCPv4{
|
||||
[]*dhcpv4.DHCPv4{ // Response for first packet.
|
||||
newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x33, 0x33, 0x33, 0x33}),
|
||||
},
|
||||
[]*dhcpv4.DHCPv4{ // Response for second packet.
|
||||
newPacket(dhcpv4.OpcodeBootReply, [4]byte{0x44, 0x44, 0x44, 0x44}),
|
||||
},
|
||||
},
|
||||
wantErr: []error{
|
||||
nil,
|
||||
nil,
|
||||
},
|
||||
},
|
||||
} {
|
||||
// Both server and client only get 2 seconds.
|
||||
ctx, cancel := context.WithTimeout(context.Background(), 2*time.Second)
|
||||
defer cancel()
|
||||
|
||||
mc, _ := serveAndClient(ctx, tt.server)
|
||||
defer mc.Close()
|
||||
|
||||
for i, send := range tt.send {
|
||||
ctx, cancel = context.WithTimeout(context.Background(), 2*time.Second)
|
||||
defer cancel()
|
||||
rcvd, err := mc.SendAndRead(ctx, DefaultServers, send, nil)
|
||||
|
||||
if wantErr := tt.wantErr[i]; err != wantErr {
|
||||
t.Errorf("SendAndReadOne(%v): got %v, want %v", send, err, wantErr)
|
||||
}
|
||||
if err := pktsExpected([]*dhcpv4.DHCPv4{rcvd}, tt.server[i]); err != nil {
|
||||
t.Errorf("got unexpected packets: %v", err)
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
144
dhcpd/nclient4/conn_unix.go
Normal file
144
dhcpd/nclient4/conn_unix.go
Normal file
@ -0,0 +1,144 @@
|
||||
// Copyright 2018 the u-root Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build darwin dragonfly freebsd linux netbsd openbsd solaris
|
||||
// +build go1.12
|
||||
|
||||
package nclient4
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"io"
|
||||
"net"
|
||||
|
||||
"github.com/mdlayher/ethernet"
|
||||
"github.com/mdlayher/raw"
|
||||
"github.com/u-root/u-root/pkg/uio"
|
||||
)
|
||||
|
||||
var (
|
||||
// BroadcastMac is the broadcast MAC address.
|
||||
//
|
||||
// Any UDP packet sent to this address is broadcast on the subnet.
|
||||
BroadcastMac = net.HardwareAddr([]byte{255, 255, 255, 255, 255, 255})
|
||||
)
|
||||
|
||||
var (
|
||||
// ErrUDPAddrIsRequired is an error used when a passed argument is not of type "*net.UDPAddr".
|
||||
ErrUDPAddrIsRequired = errors.New("must supply UDPAddr")
|
||||
)
|
||||
|
||||
// NewRawUDPConn returns a UDP connection bound to the interface and port
|
||||
// given based on a raw packet socket. All packets are broadcasted.
|
||||
//
|
||||
// The interface can be completely unconfigured.
|
||||
func NewRawUDPConn(iface string, port int) (net.PacketConn, error) {
|
||||
ifc, err := net.InterfaceByName(iface)
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
rawConn, err := raw.ListenPacket(ifc, uint16(ethernet.EtherTypeIPv4), &raw.Config{LinuxSockDGRAM: true})
|
||||
if err != nil {
|
||||
return nil, err
|
||||
}
|
||||
return NewBroadcastUDPConn(rawConn, &net.UDPAddr{Port: port}), nil
|
||||
}
|
||||
|
||||
// BroadcastRawUDPConn uses a raw socket to send UDP packets to the broadcast
|
||||
// MAC address.
|
||||
type BroadcastRawUDPConn struct {
|
||||
// PacketConn is a raw DGRAM socket.
|
||||
net.PacketConn
|
||||
|
||||
// boundAddr is the address this RawUDPConn is "bound" to.
|
||||
//
|
||||
// Calls to ReadFrom will only return packets destined to this address.
|
||||
boundAddr *net.UDPAddr
|
||||
}
|
||||
|
||||
// NewBroadcastUDPConn returns a PacketConn that marshals and unmarshals UDP
|
||||
// packets, sending them to the broadcast MAC at on rawPacketConn.
|
||||
//
|
||||
// Calls to ReadFrom will only return packets destined to boundAddr.
|
||||
func NewBroadcastUDPConn(rawPacketConn net.PacketConn, boundAddr *net.UDPAddr) net.PacketConn {
|
||||
return &BroadcastRawUDPConn{
|
||||
PacketConn: rawPacketConn,
|
||||
boundAddr: boundAddr,
|
||||
}
|
||||
}
|
||||
|
||||
func udpMatch(addr *net.UDPAddr, bound *net.UDPAddr) bool {
|
||||
if bound == nil {
|
||||
return true
|
||||
}
|
||||
if bound.IP != nil && !bound.IP.Equal(addr.IP) {
|
||||
return false
|
||||
}
|
||||
return bound.Port == addr.Port
|
||||
}
|
||||
|
||||
// ReadFrom implements net.PacketConn.ReadFrom.
|
||||
//
|
||||
// ReadFrom reads raw IP packets and will try to match them against
|
||||
// upc.boundAddr. Any matching packets are returned via the given buffer.
|
||||
func (upc *BroadcastRawUDPConn) ReadFrom(b []byte) (int, net.Addr, error) {
|
||||
ipHdrMaxLen := IPv4MaximumHeaderSize
|
||||
udpHdrLen := UDPMinimumSize
|
||||
|
||||
for {
|
||||
pkt := make([]byte, ipHdrMaxLen+udpHdrLen+len(b))
|
||||
n, _, err := upc.PacketConn.ReadFrom(pkt)
|
||||
if err != nil {
|
||||
return 0, nil, err
|
||||
}
|
||||
if n == 0 {
|
||||
return 0, nil, io.EOF
|
||||
}
|
||||
pkt = pkt[:n]
|
||||
buf := uio.NewBigEndianBuffer(pkt)
|
||||
|
||||
// To read the header length, access data directly.
|
||||
ipHdr := IPv4(buf.Data())
|
||||
ipHdr = IPv4(buf.Consume(int(ipHdr.HeaderLength())))
|
||||
|
||||
if ipHdr.TransportProtocol() != UDPProtocolNumber {
|
||||
continue
|
||||
}
|
||||
udpHdr := UDP(buf.Consume(udpHdrLen))
|
||||
|
||||
addr := &net.UDPAddr{
|
||||
IP: ipHdr.DestinationAddress(),
|
||||
Port: int(udpHdr.DestinationPort()),
|
||||
}
|
||||
if !udpMatch(addr, upc.boundAddr) {
|
||||
continue
|
||||
}
|
||||
srcAddr := &net.UDPAddr{
|
||||
IP: ipHdr.SourceAddress(),
|
||||
Port: int(udpHdr.SourcePort()),
|
||||
}
|
||||
// Extra padding after end of IP packet should be ignored,
|
||||
// if not dhcp option parsing will fail.
|
||||
dhcpLen := int(ipHdr.PayloadLength()) - udpHdrLen
|
||||
return copy(b, buf.Consume(dhcpLen)), srcAddr, nil
|
||||
}
|
||||
}
|
||||
|
||||
// WriteTo implements net.PacketConn.WriteTo and broadcasts all packets at the
|
||||
// raw socket level.
|
||||
//
|
||||
// WriteTo wraps the given packet in the appropriate UDP and IP header before
|
||||
// sending it on the packet conn.
|
||||
func (upc *BroadcastRawUDPConn) WriteTo(b []byte, addr net.Addr) (int, error) {
|
||||
udpAddr, ok := addr.(*net.UDPAddr)
|
||||
if !ok {
|
||||
return 0, ErrUDPAddrIsRequired
|
||||
}
|
||||
|
||||
// Using the boundAddr is not quite right here, but it works.
|
||||
packet := udp4pkt(b, udpAddr, upc.boundAddr)
|
||||
|
||||
// Broadcasting is not always right, but hell, what the ARP do I know.
|
||||
return upc.PacketConn.WriteTo(packet, &raw.Addr{HardwareAddr: BroadcastMac})
|
||||
}
|
||||
376
dhcpd/nclient4/ipv4.go
Normal file
376
dhcpd/nclient4/ipv4.go
Normal file
@ -0,0 +1,376 @@
|
||||
// Copyright 2018 Google LLC
|
||||
//
|
||||
// Licensed under the Apache License, Version 2.0 (the "License");
|
||||
// you may not use this file except in compliance with the License.
|
||||
// You may obtain a copy of the License at
|
||||
//
|
||||
// http://www.apache.org/licenses/LICENSE-2.0
|
||||
//
|
||||
// Unless required by applicable law or agreed to in writing, software
|
||||
// distributed under the License is distributed on an "AS IS" BASIS,
|
||||
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||||
// See the License for the specific language governing permissions and
|
||||
// limitations under the License.
|
||||
//
|
||||
// This file contains code taken from gVisor.
|
||||
|
||||
// +build go1.12
|
||||
|
||||
package nclient4
|
||||
|
||||
import (
|
||||
"encoding/binary"
|
||||
"net"
|
||||
|
||||
"github.com/u-root/u-root/pkg/uio"
|
||||
)
|
||||
|
||||
const (
|
||||
versIHL = 0
|
||||
tos = 1
|
||||
totalLen = 2
|
||||
id = 4
|
||||
flagsFO = 6
|
||||
ttl = 8
|
||||
protocol = 9
|
||||
checksum = 10
|
||||
srcAddr = 12
|
||||
dstAddr = 16
|
||||
)
|
||||
|
||||
// TransportProtocolNumber is the number of a transport protocol.
|
||||
type TransportProtocolNumber uint32
|
||||
|
||||
// IPv4Fields contains the fields of an IPv4 packet. It is used to describe the
|
||||
// fields of a packet that needs to be encoded.
|
||||
type IPv4Fields struct {
|
||||
// IHL is the "internet header length" field of an IPv4 packet.
|
||||
IHL uint8
|
||||
|
||||
// TOS is the "type of service" field of an IPv4 packet.
|
||||
TOS uint8
|
||||
|
||||
// TotalLength is the "total length" field of an IPv4 packet.
|
||||
TotalLength uint16
|
||||
|
||||
// ID is the "identification" field of an IPv4 packet.
|
||||
ID uint16
|
||||
|
||||
// Flags is the "flags" field of an IPv4 packet.
|
||||
Flags uint8
|
||||
|
||||
// FragmentOffset is the "fragment offset" field of an IPv4 packet.
|
||||
FragmentOffset uint16
|
||||
|
||||
// TTL is the "time to live" field of an IPv4 packet.
|
||||
TTL uint8
|
||||
|
||||
// Protocol is the "protocol" field of an IPv4 packet.
|
||||
Protocol uint8
|
||||
|
||||
// Checksum is the "checksum" field of an IPv4 packet.
|
||||
Checksum uint16
|
||||
|
||||
// SrcAddr is the "source ip address" of an IPv4 packet.
|
||||
SrcAddr net.IP
|
||||
|
||||
// DstAddr is the "destination ip address" of an IPv4 packet.
|
||||
DstAddr net.IP
|
||||
}
|
||||
|
||||
// IPv4 represents an ipv4 header stored in a byte array.
|
||||
// Most of the methods of IPv4 access to the underlying slice without
|
||||
// checking the boundaries and could panic because of 'index out of range'.
|
||||
// Always call IsValid() to validate an instance of IPv4 before using other methods.
|
||||
type IPv4 []byte
|
||||
|
||||
const (
|
||||
// IPv4MinimumSize is the minimum size of a valid IPv4 packet.
|
||||
IPv4MinimumSize = 20
|
||||
|
||||
// IPv4MaximumHeaderSize is the maximum size of an IPv4 header. Given
|
||||
// that there are only 4 bits to represents the header length in 32-bit
|
||||
// units, the header cannot exceed 15*4 = 60 bytes.
|
||||
IPv4MaximumHeaderSize = 60
|
||||
|
||||
// IPv4AddressSize is the size, in bytes, of an IPv4 address.
|
||||
IPv4AddressSize = 4
|
||||
|
||||
// IPv4Version is the version of the ipv4 protocol.
|
||||
IPv4Version = 4
|
||||
)
|
||||
|
||||
var (
|
||||
// IPv4Broadcast is the broadcast address of the IPv4 protocol.
|
||||
IPv4Broadcast = net.IP{0xff, 0xff, 0xff, 0xff}
|
||||
|
||||
// IPv4Any is the non-routable IPv4 "any" meta address.
|
||||
IPv4Any = net.IP{0, 0, 0, 0}
|
||||
)
|
||||
|
||||
// Flags that may be set in an IPv4 packet.
|
||||
const (
|
||||
IPv4FlagMoreFragments = 1 << iota
|
||||
IPv4FlagDontFragment
|
||||
)
|
||||
|
||||
// HeaderLength returns the value of the "header length" field of the ipv4
|
||||
// header.
|
||||
func (b IPv4) HeaderLength() uint8 {
|
||||
return (b[versIHL] & 0xf) * 4
|
||||
}
|
||||
|
||||
// Protocol returns the value of the protocol field of the ipv4 header.
|
||||
func (b IPv4) Protocol() uint8 {
|
||||
return b[protocol]
|
||||
}
|
||||
|
||||
// SourceAddress returns the "source address" field of the ipv4 header.
|
||||
func (b IPv4) SourceAddress() net.IP {
|
||||
return net.IP(b[srcAddr : srcAddr+IPv4AddressSize])
|
||||
}
|
||||
|
||||
// DestinationAddress returns the "destination address" field of the ipv4
|
||||
// header.
|
||||
func (b IPv4) DestinationAddress() net.IP {
|
||||
return net.IP(b[dstAddr : dstAddr+IPv4AddressSize])
|
||||
}
|
||||
|
||||
// TransportProtocol implements Network.TransportProtocol.
|
||||
func (b IPv4) TransportProtocol() TransportProtocolNumber {
|
||||
return TransportProtocolNumber(b.Protocol())
|
||||
}
|
||||
|
||||
// Payload implements Network.Payload.
|
||||
func (b IPv4) Payload() []byte {
|
||||
return b[b.HeaderLength():][:b.PayloadLength()]
|
||||
}
|
||||
|
||||
// PayloadLength returns the length of the payload portion of the ipv4 packet.
|
||||
func (b IPv4) PayloadLength() uint16 {
|
||||
return b.TotalLength() - uint16(b.HeaderLength())
|
||||
}
|
||||
|
||||
// TotalLength returns the "total length" field of the ipv4 header.
|
||||
func (b IPv4) TotalLength() uint16 {
|
||||
return binary.BigEndian.Uint16(b[totalLen:])
|
||||
}
|
||||
|
||||
// SetTotalLength sets the "total length" field of the ipv4 header.
|
||||
func (b IPv4) SetTotalLength(totalLength uint16) {
|
||||
binary.BigEndian.PutUint16(b[totalLen:], totalLength)
|
||||
}
|
||||
|
||||
// SetChecksum sets the checksum field of the ipv4 header.
|
||||
func (b IPv4) SetChecksum(v uint16) {
|
||||
binary.BigEndian.PutUint16(b[checksum:], v)
|
||||
}
|
||||
|
||||
// SetFlagsFragmentOffset sets the "flags" and "fragment offset" fields of the
|
||||
// ipv4 header.
|
||||
func (b IPv4) SetFlagsFragmentOffset(flags uint8, offset uint16) {
|
||||
v := (uint16(flags) << 13) | (offset >> 3)
|
||||
binary.BigEndian.PutUint16(b[flagsFO:], v)
|
||||
}
|
||||
|
||||
// SetSourceAddress sets the "source address" field of the ipv4 header.
|
||||
func (b IPv4) SetSourceAddress(addr net.IP) {
|
||||
copy(b[srcAddr:srcAddr+IPv4AddressSize], addr.To4())
|
||||
}
|
||||
|
||||
// SetDestinationAddress sets the "destination address" field of the ipv4
|
||||
// header.
|
||||
func (b IPv4) SetDestinationAddress(addr net.IP) {
|
||||
copy(b[dstAddr:dstAddr+IPv4AddressSize], addr.To4())
|
||||
}
|
||||
|
||||
// CalculateChecksum calculates the checksum of the ipv4 header.
|
||||
func (b IPv4) CalculateChecksum() uint16 {
|
||||
return Checksum(b[:b.HeaderLength()], 0)
|
||||
}
|
||||
|
||||
// Encode encodes all the fields of the ipv4 header.
|
||||
func (b IPv4) Encode(i *IPv4Fields) {
|
||||
b[versIHL] = (4 << 4) | ((i.IHL / 4) & 0xf)
|
||||
b[tos] = i.TOS
|
||||
b.SetTotalLength(i.TotalLength)
|
||||
binary.BigEndian.PutUint16(b[id:], i.ID)
|
||||
b.SetFlagsFragmentOffset(i.Flags, i.FragmentOffset)
|
||||
b[ttl] = i.TTL
|
||||
b[protocol] = i.Protocol
|
||||
b.SetChecksum(i.Checksum)
|
||||
copy(b[srcAddr:srcAddr+IPv4AddressSize], i.SrcAddr)
|
||||
copy(b[dstAddr:dstAddr+IPv4AddressSize], i.DstAddr)
|
||||
}
|
||||
|
||||
const (
|
||||
udpSrcPort = 0
|
||||
udpDstPort = 2
|
||||
udpLength = 4
|
||||
udpChecksum = 6
|
||||
)
|
||||
|
||||
// UDPFields contains the fields of a UDP packet. It is used to describe the
|
||||
// fields of a packet that needs to be encoded.
|
||||
type UDPFields struct {
|
||||
// SrcPort is the "source port" field of a UDP packet.
|
||||
SrcPort uint16
|
||||
|
||||
// DstPort is the "destination port" field of a UDP packet.
|
||||
DstPort uint16
|
||||
|
||||
// Length is the "length" field of a UDP packet.
|
||||
Length uint16
|
||||
|
||||
// Checksum is the "checksum" field of a UDP packet.
|
||||
Checksum uint16
|
||||
}
|
||||
|
||||
// UDP represents a UDP header stored in a byte array.
|
||||
type UDP []byte
|
||||
|
||||
const (
|
||||
// UDPMinimumSize is the minimum size of a valid UDP packet.
|
||||
UDPMinimumSize = 8
|
||||
|
||||
// UDPProtocolNumber is UDP's transport protocol number.
|
||||
UDPProtocolNumber TransportProtocolNumber = 17
|
||||
)
|
||||
|
||||
// SourcePort returns the "source port" field of the udp header.
|
||||
func (b UDP) SourcePort() uint16 {
|
||||
return binary.BigEndian.Uint16(b[udpSrcPort:])
|
||||
}
|
||||
|
||||
// DestinationPort returns the "destination port" field of the udp header.
|
||||
func (b UDP) DestinationPort() uint16 {
|
||||
return binary.BigEndian.Uint16(b[udpDstPort:])
|
||||
}
|
||||
|
||||
// Length returns the "length" field of the udp header.
|
||||
func (b UDP) Length() uint16 {
|
||||
return binary.BigEndian.Uint16(b[udpLength:])
|
||||
}
|
||||
|
||||
// SetSourcePort sets the "source port" field of the udp header.
|
||||
func (b UDP) SetSourcePort(port uint16) {
|
||||
binary.BigEndian.PutUint16(b[udpSrcPort:], port)
|
||||
}
|
||||
|
||||
// SetDestinationPort sets the "destination port" field of the udp header.
|
||||
func (b UDP) SetDestinationPort(port uint16) {
|
||||
binary.BigEndian.PutUint16(b[udpDstPort:], port)
|
||||
}
|
||||
|
||||
// SetChecksum sets the "checksum" field of the udp header.
|
||||
func (b UDP) SetChecksum(checksum uint16) {
|
||||
binary.BigEndian.PutUint16(b[udpChecksum:], checksum)
|
||||
}
|
||||
|
||||
// Payload returns the data contained in the UDP datagram.
|
||||
func (b UDP) Payload() []byte {
|
||||
return b[UDPMinimumSize:]
|
||||
}
|
||||
|
||||
// Checksum returns the "checksum" field of the udp header.
|
||||
func (b UDP) Checksum() uint16 {
|
||||
return binary.BigEndian.Uint16(b[udpChecksum:])
|
||||
}
|
||||
|
||||
// CalculateChecksum calculates the checksum of the udp packet, given the total
|
||||
// length of the packet and the checksum of the network-layer pseudo-header
|
||||
// (excluding the total length) and the checksum of the payload.
|
||||
func (b UDP) CalculateChecksum(partialChecksum uint16, totalLen uint16) uint16 {
|
||||
// Add the length portion of the checksum to the pseudo-checksum.
|
||||
tmp := make([]byte, 2)
|
||||
binary.BigEndian.PutUint16(tmp, totalLen)
|
||||
checksum := Checksum(tmp, partialChecksum)
|
||||
|
||||
// Calculate the rest of the checksum.
|
||||
return Checksum(b[:UDPMinimumSize], checksum)
|
||||
}
|
||||
|
||||
// Encode encodes all the fields of the udp header.
|
||||
func (b UDP) Encode(u *UDPFields) {
|
||||
binary.BigEndian.PutUint16(b[udpSrcPort:], u.SrcPort)
|
||||
binary.BigEndian.PutUint16(b[udpDstPort:], u.DstPort)
|
||||
binary.BigEndian.PutUint16(b[udpLength:], u.Length)
|
||||
binary.BigEndian.PutUint16(b[udpChecksum:], u.Checksum)
|
||||
}
|
||||
|
||||
func calculateChecksum(buf []byte, initial uint32) uint16 {
|
||||
v := initial
|
||||
|
||||
l := len(buf)
|
||||
if l&1 != 0 {
|
||||
l--
|
||||
v += uint32(buf[l]) << 8
|
||||
}
|
||||
|
||||
for i := 0; i < l; i += 2 {
|
||||
v += (uint32(buf[i]) << 8) + uint32(buf[i+1])
|
||||
}
|
||||
|
||||
return ChecksumCombine(uint16(v), uint16(v>>16))
|
||||
}
|
||||
|
||||
// Checksum calculates the checksum (as defined in RFC 1071) of the bytes in the
|
||||
// given byte array.
|
||||
//
|
||||
// The initial checksum must have been computed on an even number of bytes.
|
||||
func Checksum(buf []byte, initial uint16) uint16 {
|
||||
return calculateChecksum(buf, uint32(initial))
|
||||
}
|
||||
|
||||
// ChecksumCombine combines the two uint16 to form their checksum. This is done
|
||||
// by adding them and the carry.
|
||||
//
|
||||
// Note that checksum a must have been computed on an even number of bytes.
|
||||
func ChecksumCombine(a, b uint16) uint16 {
|
||||
v := uint32(a) + uint32(b)
|
||||
return uint16(v + v>>16)
|
||||
}
|
||||
|
||||
// PseudoHeaderChecksum calculates the pseudo-header checksum for the
|
||||
// given destination protocol and network address, ignoring the length
|
||||
// field. Pseudo-headers are needed by transport layers when calculating
|
||||
// their own checksum.
|
||||
func PseudoHeaderChecksum(protocol TransportProtocolNumber, srcAddr net.IP, dstAddr net.IP) uint16 {
|
||||
xsum := Checksum([]byte(srcAddr), 0)
|
||||
xsum = Checksum([]byte(dstAddr), xsum)
|
||||
return Checksum([]byte{0, uint8(protocol)}, xsum)
|
||||
}
|
||||
|
||||
func udp4pkt(packet []byte, dest *net.UDPAddr, src *net.UDPAddr) []byte {
|
||||
ipLen := IPv4MinimumSize
|
||||
udpLen := UDPMinimumSize
|
||||
|
||||
h := make([]byte, 0, ipLen+udpLen+len(packet))
|
||||
hdr := uio.NewBigEndianBuffer(h)
|
||||
|
||||
ipv4fields := &IPv4Fields{
|
||||
IHL: IPv4MinimumSize,
|
||||
TotalLength: uint16(ipLen + udpLen + len(packet)),
|
||||
TTL: 64, // Per RFC 1700's recommendation for IP time to live
|
||||
Protocol: uint8(UDPProtocolNumber),
|
||||
SrcAddr: src.IP.To4(),
|
||||
DstAddr: dest.IP.To4(),
|
||||
}
|
||||
ipv4hdr := IPv4(hdr.WriteN(ipLen))
|
||||
ipv4hdr.Encode(ipv4fields)
|
||||
ipv4hdr.SetChecksum(^ipv4hdr.CalculateChecksum())
|
||||
|
||||
udphdr := UDP(hdr.WriteN(udpLen))
|
||||
udphdr.Encode(&UDPFields{
|
||||
SrcPort: uint16(src.Port),
|
||||
DstPort: uint16(dest.Port),
|
||||
Length: uint16(udpLen + len(packet)),
|
||||
})
|
||||
|
||||
xsum := Checksum(packet, PseudoHeaderChecksum(
|
||||
ipv4hdr.TransportProtocol(), ipv4fields.SrcAddr, ipv4fields.DstAddr))
|
||||
udphdr.SetChecksum(^udphdr.CalculateChecksum(xsum, udphdr.Length()))
|
||||
|
||||
hdr.WriteBytes(packet)
|
||||
return hdr.Data()
|
||||
}
|
||||
22
go.mod
22
go.mod
@ -7,23 +7,25 @@ require (
|
||||
github.com/AdguardTeam/golibs v0.4.2
|
||||
github.com/AdguardTeam/urlfilter v0.11.2
|
||||
github.com/NYTimes/gziphandler v1.1.1
|
||||
github.com/fsnotify/fsnotify v1.4.7
|
||||
github.com/fsnotify/fsnotify v1.4.9
|
||||
github.com/gobuffalo/packr v1.30.1
|
||||
github.com/hugelgupf/socketpair v0.0.0-20190730060125-05d35a94e714 // indirect
|
||||
github.com/insomniacslk/dhcp v0.0.0-20200420235442-ed3125c2efe7
|
||||
github.com/google/go-cmp v0.4.0 // indirect
|
||||
github.com/hugelgupf/socketpair v0.0.0-20190730060125-05d35a94e714
|
||||
github.com/insomniacslk/dhcp v0.0.0-20200621044212-d74cd86ad5b8
|
||||
github.com/joomcode/errorx v1.0.1
|
||||
github.com/kardianos/service v1.1.0
|
||||
github.com/mdlayher/ethernet v0.0.0-20190606142754-0394541c37b7 // indirect
|
||||
github.com/mdlayher/raw v0.0.0-20191009151244-50f2db8cc065 // indirect
|
||||
github.com/mdlayher/ethernet v0.0.0-20190606142754-0394541c37b7
|
||||
github.com/mdlayher/raw v0.0.0-20191009151244-50f2db8cc065
|
||||
github.com/miekg/dns v1.1.29
|
||||
github.com/pkg/errors v0.9.1
|
||||
github.com/sirupsen/logrus v1.6.0 // indirect
|
||||
github.com/sparrc/go-ping v0.0.0-20190613174326-4e5b6552494c
|
||||
github.com/stretchr/testify v1.5.1
|
||||
github.com/u-root/u-root v6.0.0+incompatible // indirect
|
||||
github.com/u-root/u-root v6.0.0+incompatible
|
||||
go.etcd.io/bbolt v1.3.4
|
||||
golang.org/x/crypto v0.0.0-20200403201458-baeed622b8d8
|
||||
golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e
|
||||
golang.org/x/sys v0.0.0-20200331124033-c3d80250170d
|
||||
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9
|
||||
golang.org/x/net v0.0.0-20200625001655-4c5254603344
|
||||
golang.org/x/sys v0.0.0-20200519105757-fe76b779f299
|
||||
gopkg.in/natefinch/lumberjack.v2 v2.0.0
|
||||
gopkg.in/yaml.v2 v2.2.8
|
||||
gopkg.in/yaml.v2 v2.3.0
|
||||
)
|
||||
|
||||
23
go.sum
23
go.sum
@ -35,6 +35,8 @@ github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c
|
||||
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
|
||||
github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
|
||||
github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
|
||||
github.com/fsnotify/fsnotify v1.4.9 h1:hsms1Qyu0jgnwNXIxa+/V/PDsU6CfLf6CNO8H7IWoS4=
|
||||
github.com/fsnotify/fsnotify v1.4.9/go.mod h1:znqG4EE+3YCdAaPaxE2ZRY/06pZUdp0tY4IgpuI1SZQ=
|
||||
github.com/go-ole/go-ole v1.2.4 h1:nNBDSCOigTSiarFpYE9J/KtEA1IOW4CNeqT9TQDqCxI=
|
||||
github.com/go-ole/go-ole v1.2.4/go.mod h1:XCwSNxSkXRo4vlyPy93sltvi/qJq0jqQhjqQNIwKuxM=
|
||||
github.com/go-test/deep v1.0.5 h1:AKODKU3pDH1RzZzm6YZu77YWtEAq6uh1rLIAQlay2qc=
|
||||
@ -52,14 +54,16 @@ github.com/gobuffalo/packr/v2 v2.5.1/go.mod h1:8f9c96ITobJlPzI44jj+4tHnEKNt0xXWS
|
||||
github.com/google/go-cmp v0.2.0/go.mod h1:oXzfMopK8JAjlY9xF4vHSVASa0yLyX7SntLO5aqRK0M=
|
||||
github.com/google/go-cmp v0.3.0 h1:crn/baboCvb5fXaQ0IJ1SGTsTVrWpDsCWC8EGETZijY=
|
||||
github.com/google/go-cmp v0.3.0/go.mod h1:8QqcDgzrUqlUb/G2PQTWiueGozuR1884gddMywk6iLU=
|
||||
github.com/google/go-cmp v0.4.0 h1:xsAVV57WRhGj6kEIi8ReJzQlHHqcBYCElAvkovg3B/4=
|
||||
github.com/google/go-cmp v0.4.0/go.mod h1:v8dTdLbMG2kIc/vJvl+f65V22dbkXbowE6jgT/gNBxE=
|
||||
github.com/hashicorp/hcl v1.0.0/go.mod h1:E5yfLk+7swimpb2L/Alb/PJmXilQ/rhwaUYs4T20WEQ=
|
||||
github.com/hugelgupf/socketpair v0.0.0-20190730060125-05d35a94e714 h1:/jC7qQFrv8CrSJVmaolDVOxTfS9kc36uB6H40kdbQq8=
|
||||
github.com/hugelgupf/socketpair v0.0.0-20190730060125-05d35a94e714/go.mod h1:2Goc3h8EklBH5mspfHFxBnEoURQCGzQQH1ga9Myjvis=
|
||||
github.com/inconshreveable/mousetrap v1.0.0 h1:Z8tu5sraLXCXIcARxBp/8cbvlwVa7Z1NHg9XEKhtSvM=
|
||||
github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
|
||||
github.com/inconshreveable/mousetrap v1.0.0/go.mod h1:PxqpIevigyE2G7u3NXJIT2ANytuPF1OarO4DADm73n8=
|
||||
github.com/insomniacslk/dhcp v0.0.0-20200420235442-ed3125c2efe7 h1:iaCm+9nZdYb8XCSU2TfIb0qYTcAlIv2XzyKR2d2xZ38=
|
||||
github.com/insomniacslk/dhcp v0.0.0-20200420235442-ed3125c2efe7/go.mod h1:CfMdguCK66I5DAUJgGKyNz8aB6vO5dZzkm9Xep6WGvw=
|
||||
github.com/insomniacslk/dhcp v0.0.0-20200621044212-d74cd86ad5b8 h1:u+vle+5E78+cT/CSMD5/Y3NUpMgA83Yu2KhG+Zbco/k=
|
||||
github.com/insomniacslk/dhcp v0.0.0-20200621044212-d74cd86ad5b8/go.mod h1:CfMdguCK66I5DAUJgGKyNz8aB6vO5dZzkm9Xep6WGvw=
|
||||
github.com/jessevdk/go-flags v1.4.0 h1:4IU2WS7AumrZ/40jfhf4QVDMsQwqA7VEHozFRrGARJA=
|
||||
github.com/jessevdk/go-flags v1.4.0/go.mod h1:4FA24M0QyGHXBuZZK/XkWh8h0e1EYbRYJSGM75WSRxI=
|
||||
github.com/joho/godotenv v1.3.0 h1:Zjp+RcGpHhGlrMbJzXTrZZPrWj+1vfm90La1wgB6Bhc=
|
||||
@ -73,6 +77,8 @@ github.com/karrick/godirwalk v1.10.12/go.mod h1:RoGL9dQei4vP9ilrpETWE8CLOZ1kiN0L
|
||||
github.com/konsorten/go-windows-terminal-sequences v1.0.1/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
|
||||
github.com/konsorten/go-windows-terminal-sequences v1.0.2 h1:DB17ag19krx9CFsz4o3enTrPXyIXCl+2iCXH/aMAp9s=
|
||||
github.com/konsorten/go-windows-terminal-sequences v1.0.2/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
|
||||
github.com/konsorten/go-windows-terminal-sequences v1.0.3 h1:CE8S1cTafDpPvMhIxNJKvHsGVBgn1xWYf1NbHQhywc8=
|
||||
github.com/konsorten/go-windows-terminal-sequences v1.0.3/go.mod h1:T0+1ngSBFLxvqU3pZ+m/2kptfBszLMUkC4ZK/EgS/cQ=
|
||||
github.com/kr/pretty v0.1.0/go.mod h1:dAy3ld7l9f0ibDNOQOHHMYYIIbhfbHSm3C4ZsoJORNo=
|
||||
github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
|
||||
github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=
|
||||
@ -105,6 +111,8 @@ github.com/shirou/gopsutil v2.20.3+incompatible h1:0JVooMPsT7A7HqEYdydp/OfjSOYSj
|
||||
github.com/shirou/gopsutil v2.20.3+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
|
||||
github.com/sirupsen/logrus v1.4.2 h1:SPIRibHv4MatM3XXNO2BJeFLZwZ2LvZgfQ5+UNI2im4=
|
||||
github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
|
||||
github.com/sirupsen/logrus v1.6.0 h1:UBcNElsrwanuuMsnGSlYmtmgbb23qDR5dG+6X6Oo89I=
|
||||
github.com/sirupsen/logrus v1.6.0/go.mod h1:7uNnSEd1DgxDLC74fIahvMZmmYsHGZGEOFrfsX/uA88=
|
||||
github.com/sparrc/go-ping v0.0.0-20190613174326-4e5b6552494c h1:gqEdF4VwBu3lTKGHS9rXE9x1/pEaSwCXRLOZRF6qtlw=
|
||||
github.com/sparrc/go-ping v0.0.0-20190613174326-4e5b6552494c/go.mod h1:eMyUVp6f/5jnzM+3zahzl7q6UXLbgSc3MKg/+ow9QW0=
|
||||
github.com/spf13/afero v1.1.2/go.mod h1:j4pytiNVoe2o6bmDsKpLACNPDBIoEAkihy7loJ1B0CQ=
|
||||
@ -135,6 +143,8 @@ golang.org/x/crypto v0.0.0-20191011191535-87dc89f01550/go.mod h1:yigFU9vqHzYiE8U
|
||||
golang.org/x/crypto v0.0.0-20200323165209-0ec3e9974c59/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
|
||||
golang.org/x/crypto v0.0.0-20200403201458-baeed622b8d8 h1:fpnn/HnJONpIu6hkXi1u/7rR0NzilgWr4T0JmWkEitk=
|
||||
golang.org/x/crypto v0.0.0-20200403201458-baeed622b8d8/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
|
||||
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9 h1:psW17arqaxU48Z5kZ0CQnkZWQJsqcURM6tKiBApRjXI=
|
||||
golang.org/x/crypto v0.0.0-20200622213623-75b288015ac9/go.mod h1:LzIPMQfyMNhhGPhUkYOs5KpL4U8rLKemX1yGLhDgUto=
|
||||
golang.org/x/mod v0.1.1-0.20191105210325-c90efee705ee/go.mod h1:QqPTAvyqsEbceGzBzNggFXnrqF1CaUcvgkdR5Ot7KZg=
|
||||
golang.org/x/net v0.0.0-20190311183353-d8887717615a/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
|
||||
golang.org/x/net v0.0.0-20190404232315-eb5bcb51f2a3/go.mod h1:t9HGtf8HONx5eT2rtn7q6eTqICYqUVnKs3thJo3Qplg=
|
||||
@ -145,6 +155,8 @@ golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLL
|
||||
golang.org/x/net v0.0.0-20190923162816-aa69164e4478/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
|
||||
golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e h1:3G+cUijn7XD+S4eJFddp53Pv7+slrESplyjG25HgL+k=
|
||||
golang.org/x/net v0.0.0-20200324143707-d3edc9973b7e/go.mod h1:qpuaurCH72eLCgpAm/N6yyVIVM9cpaDIP3A8BGJEC5A=
|
||||
golang.org/x/net v0.0.0-20200625001655-4c5254603344 h1:vGXIOMxbNfDTk/aXCmfdLgkrSV+Z2tcbze+pEc3v5W4=
|
||||
golang.org/x/net v0.0.0-20200625001655-4c5254603344/go.mod h1:/O7V0waA8r7cgGh81Ro3o1hOxt32SMVPicZroKQ2sZA=
|
||||
golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
||||
golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a h1:WXEvlFVvvGxCJLG6REjsT03iWnKLEWinaScsxF2Vm2o=
|
||||
golang.org/x/sync v0.0.0-20200317015054-43a5402ce75a/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
|
||||
@ -157,10 +169,13 @@ golang.org/x/sys v0.0.0-20190422165155-953cdadca894/go.mod h1:h1NjWce9XRLGQEsW7w
|
||||
golang.org/x/sys v0.0.0-20190515120540-06a5c4944438/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20190606122018-79a91cf218c4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20190924154521-2837fb4f24fe/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20191005200804-aed5e4c7ecf9/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20200331124033-c3d80250170d h1:nc5K6ox/4lTFbMVSL9WRR81ixkcwXThoiF6yf+R9scA=
|
||||
golang.org/x/sys v0.0.0-20200331124033-c3d80250170d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/sys v0.0.0-20200519105757-fe76b779f299 h1:DYfZAGf2WMFjMxbgTjaC+2HC7NkNAQs+6Q8b9WEB/F4=
|
||||
golang.org/x/sys v0.0.0-20200519105757-fe76b779f299/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
|
||||
golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
|
||||
golang.org/x/text v0.3.2 h1:tW2bmiBqwgJj/UpqtC8EpXEZVYOwU0yG4iWbprSVAcs=
|
||||
golang.org/x/text v0.3.2/go.mod h1:bEr9sfX3Q8Zfm5fL9x+3itogRgK3+ptLWKqgva+5dAk=
|
||||
@ -169,6 +184,8 @@ golang.org/x/tools v0.0.0-20190624180213-70d37148ca0c/go.mod h1:/rFqwRUd4F7ZHNgw
|
||||
golang.org/x/tools v0.0.0-20191216052735-49a3e744a425 h1:VvQyQJN0tSuecqgcIxMWnnfG5kSmgy9KZR9sW3W5QeA=
|
||||
golang.org/x/tools v0.0.0-20191216052735-49a3e744a425/go.mod h1:TB2adYChydJhpapKDTa4BR/hXlZSLoq2Wpct/0txZ28=
|
||||
golang.org/x/xerrors v0.0.0-20191011141410-1b5146add898/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
|
||||
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543 h1:E7g+9GITq07hpfrRu66IVDexMakfv52eLZ2CXBWiKr4=
|
||||
golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
|
||||
gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
||||
gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
|
||||
gopkg.in/check.v1 v1.0.0-20200227125254-8fa46927fb4f h1:BLraFXnmrev5lT+xlilqcH8XK9/i0At2xKjWk4p6zsU=
|
||||
@ -179,3 +196,5 @@ gopkg.in/natefinch/lumberjack.v2 v2.0.0/go.mod h1:l0ndWWf7gzL7RNwBG7wST/UCcT4T24
|
||||
gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
|
||||
gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
|
||||
gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
|
||||
gopkg.in/yaml.v2 v2.3.0 h1:clyUAQHOM3G0M3f5vQj7LuJrETvjVot3Z5el9nffUtU=
|
||||
gopkg.in/yaml.v2 v2.3.0/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
|
||||
|
||||
Loading…
Reference in New Issue
Block a user