addr

package
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 Go to latest Published: Jul 31, 2018 License: Apache-2.0 Imports: 7 Imported by: 0

Documentation

Overview

Package addr contains types for SCION addressing.

A SCION address is composed of the following parts: ISD (ISolation Domain identifier), AS (Autonomous System idenifier), and Host (the host address).

The allocations and formatting of ISDs and ASes are documented here: https://github.com/scionproto/scion/wiki/ISD-and-AS-numbering. Note that the ':' separator for AS formatting is not used in paths/filenames for compatibility reasons, so '_' is used instead in those contexts.

Index

Constants

View Source 
const (
	HostLenNone = 0
	HostLenIPv4 = net.IPv4len
	HostLenIPv6 = net.IPv6len
	HostLenSVC  = 2
)
View Source 
const (
	IABytes   = 8
	ISDBits   = 16
	ASBits    = 48
	BGPASBits = 32
	MaxISD    = (1 << ISDBits) - 1
	MaxAS     = (1 << ASBits) - 1
	MaxBGPAS  = (1 << BGPASBits) - 1

	ISDFmtPrefix = "ISD"
	ASFmtPrefix  = "AS"
)
View Source 
const (
	ErrorBadHostAddrType = "Unsupported host address type"
)
View Source 
const SVCMcast = 0x8000

Variables

This section is empty.

Functions

func HostEq 

func HostEq(a, b HostAddr) bool

func HostLen 

func HostLen(htype HostAddrType) (uint8, error)

func HostTypeCheck 

func HostTypeCheck(t HostAddrType) bool

func IsIPv4 

func IsIPv4(ip net.IP) bool

IsIPv4 returns whether the ip is IPv4 or not. This has the side effect in Go that if the ip passed was the direct result of net.IPv4(), it will fail to detect it as an IPv4 given that the underlying byte buffer is 16B.

func IsIPv6 

func IsIPv6(ip net.IP) bool

Types

type AS 

type AS uint64

AS is the Autonomous System idenifier. See formatting and allocations here: https://github.com/scionproto/scion/wiki/ISD-and-AS-numbering#as-numbers

func ASFromFileFmt 

func ASFromFileFmt(s string, prefix bool) (AS, error)

ASFromFileFmt parses an AS from a file-format string. This is the same format as ASFromString expects, with ':' replaced by '_'. If prefix is true, an 'AS' prefix is expected and stripped before parsing.

func ASFromString 

func ASFromString(s string) (AS, error)

ASFromString parses an AS from a decimal (in the case of the 32bit BGP AS number space) or ipv6-style hex (in the case of SCION-only AS numbers) string.

func (AS) FileFmt 

func (as AS) FileFmt() string

FileFmt formats an AS for use in a file name, using '_' instead of ':' as the separator for SCION-only AS numbers.

func (AS) String 

func (as AS) String() string

type HostAddr 

type HostAddr interface {
	Size() int
	Type() HostAddrType
	Pack() common.RawBytes
	IP() net.IP
	Copy() HostAddr
	fmt.Stringer
}

func HostFromIP 

func HostFromIP(ip net.IP) HostAddr

func HostFromRaw 

func HostFromRaw(b common.RawBytes, htype HostAddrType) (HostAddr, error)

type HostAddrType 

type HostAddrType uint8
const (
	HostTypeNone HostAddrType = iota
	HostTypeIPv4
	HostTypeIPv6
	HostTypeSVC
)

func (HostAddrType) String 

func (t HostAddrType) String() string

type HostIPv4 

type HostIPv4 net.IP

func (HostIPv4) Copy 

func (h HostIPv4) Copy() HostAddr

func (HostIPv4) IP 

func (h HostIPv4) IP() net.IP

func (HostIPv4) Pack 

func (h HostIPv4) Pack() common.RawBytes

func (HostIPv4) Size 

func (h HostIPv4) Size() int

func (HostIPv4) String 

func (h HostIPv4) String() string

func (HostIPv4) Type 

func (h HostIPv4) Type() HostAddrType

type HostIPv6 

type HostIPv6 net.IP

func (HostIPv6) Copy 

func (h HostIPv6) Copy() HostAddr

func (HostIPv6) IP 

func (h HostIPv6) IP() net.IP

func (HostIPv6) Pack 

func (h HostIPv6) Pack() common.RawBytes

func (HostIPv6) Size 

func (h HostIPv6) Size() int

func (HostIPv6) String 

func (h HostIPv6) String() string

func (HostIPv6) Type 

func (h HostIPv6) Type() HostAddrType

type HostNone 

type HostNone net.IP

func (HostNone) Copy 

func (h HostNone) Copy() HostAddr

func (HostNone) IP 

func (h HostNone) IP() net.IP

func (HostNone) Pack 

func (h HostNone) Pack() common.RawBytes

func (HostNone) Size 

func (h HostNone) Size() int

func (HostNone) String 

func (h HostNone) String() string

func (HostNone) Type 

func (h HostNone) Type() HostAddrType

type HostSVC 

type HostSVC uint16
const (
	SvcBS   HostSVC = 0x0000
	SvcPS   HostSVC = 0x0001
	SvcCS   HostSVC = 0x0002
	SvcSB   HostSVC = 0x0003
	SvcNone HostSVC = 0xffff
)

func HostSVCFromString 

func HostSVCFromString(str string) HostSVC

HostSVCFromString returns the SVC address corresponding to str. For anycast SVC addresses, use BS_A, PS_A, CS_A, and SB_A; shorthand versions without the _A suffix (e.g., PS) also return anycast SVC addresses. For multicast, use BS_M, PS_M, CS_M, and SB_M.

func (HostSVC) Base 

func (h HostSVC) Base() HostSVC

func (HostSVC) Copy 

func (h HostSVC) Copy() HostAddr

func (HostSVC) IP 

func (h HostSVC) IP() net.IP

func (HostSVC) IsMulticast 

func (h HostSVC) IsMulticast() bool

func (HostSVC) Multicast 

func (h HostSVC) Multicast() HostSVC

func (HostSVC) Pack 

func (h HostSVC) Pack() common.RawBytes

func (HostSVC) Size 

func (h HostSVC) Size() int

func (HostSVC) String 

func (h HostSVC) String() string

func (HostSVC) Type 

func (h HostSVC) Type() HostAddrType

type IA 

type IA struct {
	I ISD
	A AS
}

IA represents the ISD (ISolation Domain) and AS (Autonomous System) Id of a given SCION AS.

func IAFromFileFmt 

func IAFromFileFmt(s string, prefixes bool) (IA, error)

IAFromFileFmt parses an IA from a file-format

func IAFromRaw 

func IAFromRaw(b common.RawBytes) IA

func IAFromString 

func IAFromString(s string) (IA, error)

/ IAFromString parses an IA from a string of the format 'ia-as'.

func (IA) Eq 

func (ia IA) Eq(other IA) bool

func (IA) FileFmt 

func (ia IA) FileFmt(prefixes bool) string

FileFmt returns a file-system friendly representation of ia. If prefixes is true, the format will be in the form of ISD%d-AS%d. If it is false, the format is just %d-%d.

func (IA) IAInt 

func (ia IA) IAInt() IAInt

func (IA) IsZero 

func (ia IA) IsZero() bool

func (IA) MarshalText 

func (ia IA) MarshalText() ([]byte, error)

func (*IA) Parse 

func (ia *IA) Parse(b common.RawBytes)

func (IA) String 

func (ia IA) String() string

func (*IA) UnmarshalText 

func (ia *IA) UnmarshalText(text []byte) error

allows IA to be used as a map key in JSON.

func (IA) Write 

func (ia IA) Write(b common.RawBytes)

type IAInt 

type IAInt uint64

IAInt is an integer representation of an ISD-AS.

func (IAInt) IA 

func (iaI IAInt) IA() IA

type ISD 

type ISD uint16

ISD is the ISolation Domain identifier. See formatting and allocations here: https://github.com/scionproto/scion/wiki/ISD-and-AS-numbering#isd-numbers

func ISDFromFileFmt 

func ISDFromFileFmt(s string, prefix bool) (ISD, error)

ISDFromFileFmt parses an ISD from a file-format string. If prefix is true, an 'ISD' prefix is expected and stripped before parsing.

func ISDFromString 

func ISDFromString(s string) (ISD, error)

ISDFromString parses an ISD from a decimal string.

Source Files

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