extnet

package
v0.2.3 Latest Latest
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 Go to latest Published: Feb 24, 2021 License: Apache-2.0 Imports: 19 Imported by: 1

Documentation

Overview

Package extnet extend network

Index

Constants

View Source 
const (
	IPv4Uint32Cnt = 1
	IPv6Uint32Cnt = 4
)

IP uint32 count const defined

Variables

View Source 
var ErrInvalidBitPosition = fmt.Errorf("bit position not valid")

ErrInvalidBitPosition is returned when bits requested is not valid.

Functions

func DialContext 

func DialContext(ctx context.Context, d Dialer, network, address string) (net.Conn, error)

DialContext dial context with dialer WARNING: this can leak a goroutine for as long as the underlying Dialer implementation takes to timeout A Conn returned from a successful Dial after the context has been canceled will be immediately closed.

func GetFreePort 

func GetFreePort() (int, error)

GetFreePort asks the kernel for a free open port that is ready to use.

func GetFreePorts 

func GetFreePorts(count int) ([]int, error)

GetFreePorts asks the kernel for free open ports that are ready to use.

func IsDomain 

func IsDomain(host string) bool

IsDomain 是否是域名,只检查host或ip,不可带port,否则会误判

func IsErrClosed 

func IsErrClosed(err error) bool

IsErrClosed is error closed

func IsErrDeadline 

func IsErrDeadline(err error) bool

IsErrDeadline is error i/o deadline reached

func IsErrRefused 

func IsErrRefused(err error) bool

IsErrRefused is error connection refused

func IsErrSocketNotConnected 

func IsErrSocketNotConnected(err error) bool

IsErrSocketNotConnected is error socket is not connected

func IsErrTemporary 

func IsErrTemporary(err error) bool

IsErrTemporary is net error timeout

func IsErrTimeout 

func IsErrTimeout(err error) bool

IsErrTimeout is net error timeout

func IsIntranet 

func IsIntranet(host string) bool

IsIntranet is intranet network,if host is domain,it will looks up host using the local resolver. net.LookupIP may cause deadlock in windows see https://github.com/golang/go/issues/24178 局域网IP段: 

A类: 10.0.0.0~10.255.255.255
B类: 172.16.0.0~172.31.255.255
C类: 192.168.0.0~192.168.255.255

func IsIntranetIP 

func IsIntranetIP(ip net.IP) bool

IsIntranetIP is intranet network or not. 局域网IP段: 

A类: 10.0.0.0~10.255.255.255
B类: 172.16.0.0~172.31.255.255
C类: 192.168.0.0~192.168.255.255

func JoinHostPort 

func JoinHostPort(host string, port uint16) string

JoinHostPort combines host and port into a network address of the form "host:port". If host contains a colon, as found in literal IPv6 addresses, then JoinHostPort returns "[host]:port".

See func Dial for a description of the host and port parameters.

func Listen 

func Listen(network, addr string, chains ...AdornConn) (net.Listener, error)

Listen announces on the local network address and afterChains

func MustGetFreePort 

func MustGetFreePort() int

MustGetFreePort calls GetFreePort and panics on error

func NewListener 

func NewListener(inner net.Listener, chains ...AdornConn) net.Listener

NewListener new listener

func NextIP 

func NextIP(ip net.IP) net.IP

NextIP returns the next sequential ip.

func PreviousIP 

func PreviousIP(ip net.IP) net.IP

PreviousIP returns the previous sequential ip.

func SplitHostPort 

func SplitHostPort(addr string) (string, uint16, error)

SplitHostPort splits a network address of the form "host:port", "host%zone:port", "[host]:port" or "[host%zone]:port" into host or host%zone and port.

A literal IPv6 address in hostport must be enclosed in square brackets, as in "[::1]:80", "[::1%lo0]:80".

See func Dial for a description of the hostport parameter, and host and port results.

func ToIP 

func ToIP(v uint32) net.IP

ToIP 数值转换为net.ToIP

Types

type AdornConn 

type AdornConn func(conn net.Conn) net.Conn

AdornConn defines the conn decorate.

func AdornFlow 

func AdornFlow(wc, rc, tc *atomic.Uint64) AdornConn

AdornFlow cflow chain

func AdornGzip 

func AdornGzip(compress bool) AdornConn

AdornGzip gzip chain

func AdornGzipLevel 

func AdornGzipLevel(compress bool, level int) AdornConn

AdornGzipLevel gzip chain with level level see gzip package

func AdornIol 

func AdornIol(opts ...ciol.Options) AdornConn

AdornIol ciol chain

func AdornSnappy 

func AdornSnappy(compress bool) AdornConn

AdornSnappy snappy chain

func AdornZlib 

func AdornZlib(compress bool) AdornConn

AdornZlib zlib chain

func AdornZlibLevel 

func AdornZlibLevel(compress bool, level int) AdornConn

AdornZlibLevel zlib chain with the level level see zlib package

func AdornZlibLevelDict 

func AdornZlibLevelDict(compress bool, level int, dict []byte) AdornConn

AdornZlibLevelDict zlib chain with the level and dict level see zlib package

func BaseAdornStcp 

func BaseAdornStcp(method, password string) AdornConn

BaseAdornStcp base adorn encrypt with method and password

func BaseAdornTLSClient 

func BaseAdornTLSClient(conf *tls.Config) AdornConn

BaseAdornTLSClient base adorn tls client

func BaseAdornTLSServer 

func BaseAdornTLSServer(conf *tls.Config) AdornConn

BaseAdornTLSServer base adorn tls server

type AdornConnsChain 

type AdornConnsChain []AdornConn

AdornConnsChain defines a adornConn array. NOTE: 在conn read或write调用过程是在链上从后往前执行的,(类似洋葱,包在最外面的选执行), 

所以基础链,统计链的应放在链头,也就是chains的第一个,最靠近出口

type Client 

type Client struct {
	Timeout     time.Duration   // timeout for dial
	AdornChains AdornConnsChain // adorn chains
	Forward     Dialer          // if set it will use forward.
}

Client tcp dialer

func (*Client) Dial 

func (sf *Client) Dial(network, addr string) (net.Conn, error)

Dial connects to the address on the named network.

func (*Client) DialContext 

func (sf *Client) DialContext(ctx context.Context, network, addr string) (net.Conn, error)

DialContext connects to the address on the named network using the provided context.

type ContextDialer 

type ContextDialer interface {
	DialContext(ctx context.Context, network, address string) (net.Conn, error)
}

ContextDialer A ContextDialer dials using a context.

type Dialer 

type Dialer interface {
	Dial(network, address string) (net.Conn, error)
}

Dialer A Dialer is a means to establish a connection.

type IPNet 

type IPNet struct {
	*net.IPNet
	Number Numeric
	Mask   NumericMask
}

IPNet represents a block of network numbers, also known as CIDR.

func NewIPNet 

func NewIPNet(ipNet *net.IPNet) *IPNet

NewIPNet returns Network built using given net.IPNet.

func (*IPNet) ContainsIPNet 

func (n *IPNet) ContainsIPNet(o *IPNet) bool

ContainsIPNet returns true if Network covers o, false otherwise

func (*IPNet) ContainsNumeric 

func (n *IPNet) ContainsNumeric(nn Numeric) bool

ContainsNumeric returns true if Numeric is in range of IPNet, false otherwise.

func (*IPNet) Equal 

func (n *IPNet) Equal(n1 *IPNet) bool

Equal is the equality test for 2 networks.

func (*IPNet) Masked 

func (n *IPNet) Masked(ones int) *IPNet

Masked returns a new network conforming to new mask.

type Numeric 

type Numeric []uint32

Numeric represents an ToIP address using uint32 as internal storage. IPv4 uses 1 uint32 IPv6 uses 4 uint32.

func IP 

func IP(ip net.IP) Numeric

IP returns a equivalent Numeric to given IP address, return nil if ip is neither IPv4 nor IPv6.

func IPv4 

func IPv4(a uint32) Numeric

IPv4 returns a equivalent Numeric to given uint32 number,

func IPv6 

func IPv6(a, b, c, d uint32) Numeric

IPv6 returns a equivalent Numeric to given uint32 number,

func (Numeric) Bit 

func (n Numeric) Bit(position uint) (bool, error)

Bit returns uint32 representing the bit value at given position, e.g., "128.0.0.0" has bit value of 1 at position 31, and 0 for positions 30 to 0.

func (Numeric) Equal 

func (n Numeric) Equal(n1 Numeric) bool

Equal is the equality test for 2 network numbers.

func (Numeric) Mask 

func (n Numeric) Mask(m NumericMask) Numeric

Mask returns a new masked Numeric from given Numeric.

func (Numeric) Next 

func (n Numeric) Next() Numeric

Next returns the next logical network number.

func (Numeric) Previous 

func (n Numeric) Previous() Numeric

Previous returns the previous logical network number.

func (Numeric) String 

func (n Numeric) String() string

String returns the string form of the IP address ip.

func (Numeric) To16 

func (n Numeric) To16() Numeric

To16 returns ip address if ip is IPv6, returns nil otherwise.

func (Numeric) To4 

func (n Numeric) To4() Numeric

To4 returns ip address if ip is IPv4, returns nil otherwise.

func (Numeric) ToIP 

func (n Numeric) ToIP() net.IP

ToIP returns equivalent net.IP.

type NumericMask 

type NumericMask []uint32

NumericMask represents an IP address using uint32 as internal storage. IPv4 uses 1 uint32, while IPv6 uses 4 uint32.

Source Files

View all Source files

Directories

Path Synopsis
connection
cbuffered
Package cbuffered 实现读缓冲的net.conn接口
 Package cbuffered 实现读缓冲的net.conn接口
ccrypt
Package ccrypt 实现net.conn的加密conn接口 aes cfb加密码的连接,通过提供的配置使用pbkdf2生成key, 依靠key和hash生成iv
 Package ccrypt 实现net.conn的加密conn接口 aes cfb加密码的连接,通过提供的配置使用pbkdf2生成key, 依靠key和hash生成iv
cencrypt
Package cencrypt 实现加密的net.conn接口
 Package cencrypt 实现加密的net.conn接口
cflow
Package cflow 实现字节统计,读,写,读写统计,以字节为准.
 Package cflow 实现字节统计,读,写,读写统计,以字节为准.
cgzip
Package cgzip 采用gzip压缩实现的net.conn接口
 Package cgzip 采用gzip压缩实现的net.conn接口
ciol
Package ciol 实现 net.conn 网络io限速器接口
 Package ciol 实现 net.conn 网络io限速器接口
csnappy
Package csnappy 采用snappy压缩实现的net.conn接口
 Package csnappy 采用snappy压缩实现的net.conn接口
czlib
Package czlib 采用zlib压缩实现的net.conn接口
 Package czlib 采用zlib压缩实现的net.conn接口

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