ip

package
v1.11.0-cni-plu...-ddfc3b1 Latest Latest
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This package is not in the latest version of its module.

 Go to latest Published: Nov 20, 2024 License: Apache-2.0, Apache-2.0 Imports: 9 Imported by: 0

Documentation

Overview

The ip package contains yet another IP address (and CIDR) type :-). The types differ from the ones in the net package in that they are backed by fixed-sized arrays of the appropriate size. The key advantage of using a fixed-size array is that it makes the types hashable so they can be used as map keys. In addition, they can be converted to net.IP by slicing.

Index

Constants

View Source 
const (
	IPv4SizeDword = 1
	IPv6SizeDword = 4
)

Variables

View Source 
var ErrInvalidIP = errors.New("Failed to parse IP address")

Functions

func IPNetsEqual 

func IPNetsEqual(net1, net2 *net.IPNet) bool

func Int2NetIP 

func Int2NetIP(addr uint32) net.IP

func ParseIPAs16Byte 

func ParseIPAs16Byte(ip string) (ipb [16]byte, ok bool)

Types

type Addr 

type Addr interface {
	// Version returns the IP version; 4 or 6.
	Version() uint8
	// AsNetIP returns a net.IP, which is backed by/shares storage with
	// this object.
	AsNetIP() net.IP
	AsCalicoNetIP() calinet.IP
	AsCIDR() CIDR
	String() string
	AsBinary() string
	Add(int) Addr
	NthBit(uint) int
}

Addr represents either an IPv4 or IPv6 IP address.

func FromCalicoIP 

func FromCalicoIP(ip calinet.IP) Addr

func FromIPOrCIDRString 

func FromIPOrCIDRString(s string) Addr

Parses an IP or CIDR string and returns the IP.

func FromNetIP 

func FromNetIP(netIP net.IP) Addr

func FromString 

func FromString(s string) Addr

type CIDR 

type CIDR interface {
	Version() uint8
	Addr() Addr
	Prefix() uint8
	String() string
	ToIPNet() net.IPNet
	AsBinary() string
	Contains(addr Addr) bool
	// IsSingleAddress returns true if the CIDR represents a single address.
	// I.e. a /32 for IPv4 or a /128 for IPv6.
	IsSingleAddress() bool
}

func CIDRFromAddrAndPrefix 

func CIDRFromAddrAndPrefix(addr Addr, prefixLen int) CIDR

CIDRFromAddrAndPrefix.

func CIDRFromCalicoNet 

func CIDRFromCalicoNet(ipNet calinet.IPNet) CIDR

func CIDRFromIPNet 

func CIDRFromIPNet(ipNet *net.IPNet) CIDR

CIDRFromIPNet converts a *net.IPNet to a CIDR; if passed nil, returns nil.

func CIDRFromNetIP 

func CIDRFromNetIP(netIP net.IP) CIDR

CIDRFromNetIP converts the given IP into our CIDR representation as a /32 or /128.

func CIDRFromString 

func CIDRFromString(cidrStr string) (CIDR, error)

func CIDRsFromCalicoNets 

func CIDRsFromCalicoNets(ipNets []calinet.IPNet) []CIDR

func CommonPrefix 

func CommonPrefix(a, b CIDR) CIDR

func MustParseCIDROrIP 

func MustParseCIDROrIP(s string) CIDR

MustParseCIDROrIP parses the given IP address or CIDR, treating IP addresses as "full length" CIDRs. For example, "10.0.0.1" is treated as "10.0.0.1/32". It panics on failure.

func ParseCIDROrIP 

func ParseCIDROrIP(s string) (CIDR, error)

ParseCIDROrIP parses the given IP address or CIDR, treating IP addresses as "full length" CIDRs. For example, "10.0.0.1" is treated as "10.0.0.1/32".

type CIDRNode 

type CIDRNode struct {
	// contains filtered or unexported fields
}

type CIDRTrie 

type CIDRTrie struct {
	// contains filtered or unexported fields
}

func NewCIDRTrie 

func NewCIDRTrie() *CIDRTrie

func (*CIDRTrie) ClosestDescendants 

func (t *CIDRTrie) ClosestDescendants(buf []CIDR, parent CIDR) []CIDR

ClosestDescendants returns a list of CIDRs representing the closest descendants of the given CIDR in the trie that have data associated with them. It does not return a full list of all descendants - only any descendants that are tied for being the closest to the given CIDR.

For example, given the following trie, where * indicates an intermediate node with no data associated with it: 

       10.0.0.0/16
            |
   +----------------+
   |                |

10.0.1.0/24    10.0.2.0/24*

   |                |

10.0.1.1/32     10.0.2.1/32

ClosestDescendants(10.0.0.0/16) => [10.0.1.0/24, 10.0.2.1/32] ClosestDescendants(10.0.1.0/24) => 10.0.1.1/32 ClosestDescendants(10.0.2.0/24) => 10.0.2.1/32

The caller may pass in a buffer to store the results, which will be appended to and returned. If the buffer is nil, a new slice will be created and returned.

func (*CIDRTrie) CoveredBy 

func (t *CIDRTrie) CoveredBy(cidr CIDR) bool

func (*CIDRTrie) Covers 

func (t *CIDRTrie) Covers(cidr CIDR) bool

func (*CIDRTrie) Delete 

func (t *CIDRTrie) Delete(cidr CIDR)

func (*CIDRTrie) Get 

func (t *CIDRTrie) Get(cidr CIDR) interface{}

func (*CIDRTrie) Intersects 

func (t *CIDRTrie) Intersects(cidr CIDR) bool

func (*CIDRTrie) LPM 

func (t *CIDRTrie) LPM(cidr CIDR) (CIDR, interface{})

LPM does a longest prefix match on the trie

func (*CIDRTrie) LookupPath 

func (t *CIDRTrie) LookupPath(buffer []CIDRTrieEntry, cidr CIDR) []CIDRTrieEntry

LookupPath looks up the given CIDR in the trie. It returns a slice containing a CIDRTrieEntry for each CIDR in the trie that encloses the given CIDR. If buffer is non-nil, then it is used to store the entries; if it is too short append() is used to extend it and the updated slice is returned.

If the CIDR is not in the trie then an empty slice is returned.

func (*CIDRTrie) ToSlice 

func (t *CIDRTrie) ToSlice() []CIDRTrieEntry

func (*CIDRTrie) Update 

func (t *CIDRTrie) Update(cidr CIDR, value interface{})

func (*CIDRTrie) Visit 

func (t *CIDRTrie) Visit(f func(cidr CIDR, data interface{}) bool)

type CIDRTrieEntry 

type CIDRTrieEntry struct {
	CIDR CIDR
	Data interface{}
}

type V4Addr 

type V4Addr [4]byte

func (V4Addr) Add 

func (a V4Addr) Add(n int) Addr

func (V4Addr) AsBinary 

func (a V4Addr) AsBinary() string

func (V4Addr) AsCIDR 

func (a V4Addr) AsCIDR() CIDR

func (V4Addr) AsCalicoNetIP 

func (a V4Addr) AsCalicoNetIP() calinet.IP

func (V4Addr) AsNetIP 

func (a V4Addr) AsNetIP() net.IP

func (V4Addr) AsUint32 

func (a V4Addr) AsUint32() uint32

func (V4Addr) NthBit 

func (a V4Addr) NthBit(n uint) int

func (V4Addr) String 

func (a V4Addr) String() string

func (V4Addr) Version 

func (a V4Addr) Version() uint8

type V4CIDR 

type V4CIDR struct {
	// contains filtered or unexported fields
}

func V4CommonPrefix 

func V4CommonPrefix(a, b V4CIDR) V4CIDR

func (V4CIDR) Addr 

func (c V4CIDR) Addr() Addr

func (V4CIDR) AsBinary 

func (c V4CIDR) AsBinary() string

func (V4CIDR) Contains 

func (c V4CIDR) Contains(addr Addr) bool

func (V4CIDR) ContainsV4 

func (c V4CIDR) ContainsV4(addr V4Addr) bool

func (V4CIDR) IsSingleAddress 

func (c V4CIDR) IsSingleAddress() bool

func (V4CIDR) Prefix 

func (c V4CIDR) Prefix() uint8

func (V4CIDR) String 

func (c V4CIDR) String() string

func (V4CIDR) ToIPNet 

func (c V4CIDR) ToIPNet() net.IPNet

func (V4CIDR) Version 

func (c V4CIDR) Version() uint8

type V6Addr 

type V6Addr [16]byte

func (V6Addr) Add 

func (a V6Addr) Add(n int) Addr

func (V6Addr) AsBinary 

func (a V6Addr) AsBinary() string

func (V6Addr) AsCIDR 

func (a V6Addr) AsCIDR() CIDR

func (V6Addr) AsCalicoNetIP 

func (a V6Addr) AsCalicoNetIP() calinet.IP

func (V6Addr) AsNetIP 

func (a V6Addr) AsNetIP() net.IP

func (V6Addr) AsUint64Pair 

func (a V6Addr) AsUint64Pair() (uint64, uint64)

AsUint64Pair returns a pair of uint64 representing a V6Addr as there is no native 128 bit uint type in go.

func (V6Addr) NthBit 

func (a V6Addr) NthBit(n uint) int

func (V6Addr) String 

func (a V6Addr) String() string

func (V6Addr) Version 

func (a V6Addr) Version() uint8

type V6CIDR 

type V6CIDR struct {
	// contains filtered or unexported fields
}

func V6CommonPrefix 

func V6CommonPrefix(a, b V6CIDR) V6CIDR

func (V6CIDR) Addr 

func (c V6CIDR) Addr() Addr

func (V6CIDR) AsBinary 

func (c V6CIDR) AsBinary() string

func (V6CIDR) Contains 

func (c V6CIDR) Contains(addr Addr) bool

func (V6CIDR) ContainsV6 

func (c V6CIDR) ContainsV6(addr V6Addr) bool

func (V6CIDR) IsSingleAddress 

func (c V6CIDR) IsSingleAddress() bool

func (V6CIDR) Prefix 

func (c V6CIDR) Prefix() uint8

func (V6CIDR) String 

func (c V6CIDR) String() string

func (V6CIDR) ToIPNet 

func (c V6CIDR) ToIPNet() net.IPNet

func (V6CIDR) Version 

func (c V6CIDR) Version() uint8

Source Files

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