Affected by GO-2022-1119 and 1 other vulnerabilities

GO-2022-1119: Tailscale daemon is vulnerable to information disclosure via CSRF in tailscale.com

GO-2022-1120: Tailscale Windows daemon is vulnerable to RCE via CSRF in tailscale.com

packet

package

v0.97.0 Latest Latest Go to latest Published: Mar 17, 2020 License: BSD-3-Clause Imports: 6 Imported by: 0

Details

Valid go.mod file
Redistributable license
Tagged version
Stable version
Learn more about best practices

Repository

github.com/tailscale/tailscale

Links

Open Source Insights

Documentation ¶

Index ¶

Constants
func GenICMP(srcIP, dstIP IP, ipid uint16, icmpType uint8, icmpCode uint8, payload []byte) []byte
func Hexdump(b []byte) string
type IP
- func NewIP(b net.IP) IP
type IPProto
- func (p IPProto) String() string
type QDecode

Constants ¶

View Source

const (
	EchoReply   uint8 = 0x00
	EchoRequest uint8 = 0x08
)

View Source

const (
	TCPSyn    uint8 = 0x02
	TCPAck    uint8 = 0x10
	TCPSynAck uint8 = TCPSyn | TCPAck
)

View Source

const IPAny = IP(0)

View Source

const MIN_FRAG = 60 + 20 // max IPv4 header + basic TCP header

RFC1858: prevent overlapping fragment attacks.

Variables ¶

This section is empty.

Functions ¶

func GenICMP ¶

func GenICMP(srcIP, dstIP IP, ipid uint16, icmpType uint8, icmpCode uint8, payload []byte) []byte

func Hexdump ¶

func Hexdump(b []byte) string

Types ¶

type IP ¶

type IP uint32

func NewIP ¶

func NewIP(b net.IP) IP

func (*IP) MarshalJSON ¶

func (ipp *IP) MarshalJSON() ([]byte, error)

func (IP) String ¶

func (ip IP) String() string

func (*IP) UnmarshalJSON ¶

func (ipp *IP) UnmarshalJSON(b []byte) error

type IPProto ¶

type IPProto int

const (
	Junk IPProto = iota
	Fragment
	ICMP
	UDP
	TCP
)

func (IPProto) String ¶

func (p IPProto) String() string

type QDecode ¶

type QDecode struct {
	IPProto  IPProto // IP subprotocol (UDP, TCP, etc)
	SrcIP    IP      // IP source address
	DstIP    IP      // IP destination address
	SrcPort  uint16  // TCP/UDP source port
	DstPort  uint16  // TCP/UDP destination port
	TCPFlags uint8   // TCP flags (SYN, ACK, etc)
	// contains filtered or unexported fields
}

func (*QDecode) Decode ¶

func (q *QDecode) Decode(b []byte)

An extremely simple packet decoder for basic IPv4 packet types. It extracts only the subprotocol id, IP addresses, and (if any) ports, and shouldn't need any memory allocation.

func (*QDecode) EchoRespond ¶

func (q *QDecode) EchoRespond() []byte

func (*QDecode) IsEchoRequest ¶

func (q *QDecode) IsEchoRequest() bool

For a packet that has already been decoded, check if it's an IPv4 ICMP Echo Request.

func (*QDecode) IsTCPSyn ¶

func (q *QDecode) IsTCPSyn() bool

For a decoded TCP packet, return true if it's a TCP SYN packet (ie. the first packet in a new connection).

func (QDecode) String ¶

func (q QDecode) String() string

func (*QDecode) Sub ¶

func (q *QDecode) Sub(begin, n int) []byte

Returns a subset of the IP subprotocol section.

func (*QDecode) Trim ¶

func (q *QDecode) Trim() []byte

For a packet that is known to be IPv4, trim the buffer to its IPv4 length. Sometimes packets arrive from an interface with extra bytes on the end. This removes them.

Source Files ¶

View all Source files

packet.go

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