geo

package

v0.11.2770-beta Latest Latest Go to latest Published: Oct 4, 2015 License: MIT Imports: 12 Imported by: 4

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Repository

github.com/Lafeng/deblocus

Documentation ¶

Overview ¶

*

A minimalistic, memory size-savvy and fairly fast radix tree (AKA Patricia trie)
implementation that uses IPv4 addresses with netmasks as keys and 32-bit signed
integers as values. *
This tree is generally uses in read-only manner: there are no key removal operation
and the whole thing works best in pre-allocated fashion.

Index ¶

Constants
Variables
func AtoU16(a []byte) uint16
func EXTRACT(p, n, str uint32) uint32
func EXTRACT8(p uint32, n uint8, str uint32) uint32
func GETADR(node uint32) uint32
func GETBRANCH(node uint32) uint32
func GETSKIP(node uint32) uint32
func IPv4Itoa(i uint32) string
func ParseCIDR(s string) (ip, m uint32)
func REMOVE(p, str uint32) uint32
func RangeCIDR(s string) (uint32, uint32)
func SETBRANCH(branch uint32) uint32
func SETSKIP(skip uint32) uint32
func Serialize(r *routingTable) (t, b, p []byte)
func StoU16(a string) uint16
func U16toS(u uint16) string
type GeoIPFilter
- func NewGeoIPFilter(keyword string) (f *GeoIPFilter, e error)
- func (f *GeoIPFilter) Filter(host string) bool
type GeoLite2Reader
- func (r *GeoLite2Reader) Iter(callback func(fields []string)) (e error)
- func (r *GeoLite2Reader) ReadEntries() (entries entrySet, e error)
- func (r *GeoLite2Reader) ReadToRoutingTable() *routingTable

Constants ¶

View Source

const (
	GEO2_LOC_FILE  = "GeoLite2-Country-Locations-en.csv"
	GEO2_IPV4_FILE = "GeoLite2-Country-Blocks-IPv4.csv"
)

View Source

const (
	NOPRE   int32  = -1 /* an empty prefix pointer */
	ADRSIZE        = 32
	U32ZERO uint32 = 0
	MASK32  uint32 = 0xffffffff
)

View Source

const UseNexthopCompression = false

Variables ¶

View Source

var (
	ROOTBRANCH uint32  = 16   // The branching factor at the root
	FILLFACT   float64 = 0.50 // The trie fill factor
)

Functions ¶

func AtoU16 ¶

func AtoU16(a []byte) uint16

func EXTRACT ¶

func EXTRACT(p, n, str uint32) uint32

extract n bits from str starting at position p

func EXTRACT8 ¶

func EXTRACT8(p uint32, n uint8, str uint32) uint32

func GETADR ¶

func GETADR(node uint32) uint32

func GETBRANCH ¶

func GETBRANCH(node uint32) uint32

func GETSKIP ¶

func GETSKIP(node uint32) uint32

macro

func IPv4Itoa ¶

func IPv4Itoa(i uint32) string

func ParseCIDR ¶

func ParseCIDR(s string) (ip, m uint32)

CIDR utils

parse 10-bit cidr literal to binary ip/mask

func REMOVE ¶

func REMOVE(p, str uint32) uint32

remove the first p bits from string

func RangeCIDR ¶

func RangeCIDR(s string) (uint32, uint32)

func SETBRANCH ¶

func SETBRANCH(branch uint32) uint32

func SETSKIP ¶

func SETSKIP(skip uint32) uint32

func Serialize ¶

func Serialize(r *routingTable) (t, b, p []byte)

Serialize routingTable{trie,base,pre} to 3-[]byte directly without copying then could make persistent data

func StoU16 ¶

func StoU16(a string) uint16

func U16toS ¶

func U16toS(u uint16) string

Types ¶

type GeoIPFilter ¶

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

func NewGeoIPFilter ¶

func NewGeoIPFilter(keyword string) (f *GeoIPFilter, e error)

func (*GeoIPFilter) Filter ¶

func (f *GeoIPFilter) Filter(host string) bool

type GeoLite2Reader ¶

type GeoLite2Reader struct {
	CountryCode  map[int]string
	Count        int
	RelativePath string
}

func (*GeoLite2Reader) Iter ¶

func (r *GeoLite2Reader) Iter(callback func(fields []string)) (e error)

func (*GeoLite2Reader) ReadEntries ¶

func (r *GeoLite2Reader) ReadEntries() (entries entrySet, e error)

for testing, update-geodb

func (*GeoLite2Reader) ReadToRoutingTable ¶

func (r *GeoLite2Reader) ReadToRoutingTable() *routingTable

for update-geodb

Source Files ¶

View all Source files

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