utils

package
v0.0.0-...-1ef8d7c Latest Latest
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 Go to latest Published: Jun 29, 2018 License: GPL-3.0 Imports: 34 Imported by: 0

Documentation

Overview

Provides leaky buffer, based on the example in Effective Go.

Index

Constants

View Source 
const LeakyBufSize = 2048 // data.len(2) + hmacsha1(10) + data(4096)

Variables

View Source 
var LeakyBuffer = NewLeakyBuf(maxNBuf, LeakyBufSize)
View Source 
var SHARD_COUNT = 32

Functions

func BuildPacket 

func BuildPacket(typ uint8, data ...string) []byte

func BuildPacketData 

func BuildPacketData(data ...string) []byte

func CloseConn 

func CloseConn(conn *net.Conn)

func ConnectHost 

func ConnectHost(hostAndPort string, timeout int) (conn net.Conn, err error)

func ConnectKCPHost 

func ConnectKCPHost(hostAndPort string, config kcpcfg.KCPConfigArgs) (conn net.Conn, err error)

func GetAllInterfaceAddr 

func GetAllInterfaceAddr() ([]net.IP, error)

func GetKCPBlock 

func GetKCPBlock(method, key string) (block kcp.BlockCrypt)

func HTTPGet 

func HTTPGet(URL string, timeout int) (err error)

func HttpGet 

func HttpGet(URL string, timeout int, host ...string) (body []byte, code int, err error)

func InsertProxyHeaders 

func InsertProxyHeaders(head []byte, headers string) []byte

func IoBind 

func IoBind(dst io.ReadWriteCloser, src io.ReadWriteCloser, fn func(err interface{}), log *logger.Logger)

func IsHTTP 

func IsHTTP(head []byte) bool

func IsIternalIP 

func IsIternalIP(domainOrIP string, always bool) bool

func IsSocks5 

func IsSocks5(head []byte) bool

func Keygen 

func Keygen() (err error)

func NewCompConn 

func NewCompConn(conn net.Conn) net.Conn

func PathExists 

func PathExists(_path string) bool

func RandInt 

func RandInt(strLen int) int64

func RandString 

func RandString(strlen int) string

func ReadData 

func ReadData(r io.Reader) (data string, err error)

func ReadPacket 

func ReadPacket(r io.Reader, typ *uint8, data ...*string) (err error)

func ReadPacketData 

func ReadPacketData(r io.Reader, data ...*string) (err error)

func ReadUDPPacket 

func ReadUDPPacket(_reader io.Reader) (srcAddr string, packet []byte, err error)

func RemoveProxyHeaders 

func RemoveProxyHeaders(head []byte) []byte

func SubBytes 

func SubBytes(bytes []byte, start, end int) []byte

func SubStr 

func SubStr(str string, start, end int) string

func TlsBytes 

func TlsBytes(cert, key string) (certBytes, keyBytes []byte, err error)

func TlsConnect 

func TlsConnect(host string, port, timeout int, certBytes, keyBytes, caCertBytes []byte) (conn tls.Conn, err error)

func TlsConnectHost 

func TlsConnectHost(host string, timeout int, certBytes, keyBytes, caCertBytes []byte) (conn tls.Conn, err error)

func UDPPacket 

func UDPPacket(srcAddr string, packet []byte) []byte

func Uniqueid 

func Uniqueid() string

Types

type BasicAuth 

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

func NewBasicAuth 

func NewBasicAuth(dns *DomainResolver, log *logger.Logger) BasicAuth

func (*BasicAuth) Add 

func (ba *BasicAuth) Add(userpassArr []string) (n int)

func (*BasicAuth) AddFromFile 

func (ba *BasicAuth) AddFromFile(file string) (n int, err error)

func (*BasicAuth) Check 

func (ba *BasicAuth) Check(userpass string, ip, target string) (ok bool)

func (*BasicAuth) CheckUserPass 

func (ba *BasicAuth) CheckUserPass(user, pass, ip, target string) (ok bool)

func (*BasicAuth) SetAuthURL 

func (ba *BasicAuth) SetAuthURL(URL string, code, timeout, retry int)

func (*BasicAuth) Total 

func (ba *BasicAuth) Total() (n int)

type BufferedConn 

type BufferedConn struct {
	net.Conn // So that most methods are embedded
	// contains filtered or unexported fields
}

func NewBufferedConn 

func NewBufferedConn(c net.Conn) BufferedConn

func NewBufferedConnSize 

func NewBufferedConnSize(c net.Conn, n int) BufferedConn

func (BufferedConn) Buffered 

func (b BufferedConn) Buffered() int

func (BufferedConn) Peek 

func (b BufferedConn) Peek(n int) ([]byte, error)

func (BufferedConn) Read 

func (b BufferedConn) Read(p []byte) (int, error)

func (BufferedConn) ReadByte 

func (b BufferedConn) ReadByte() (byte, error)

func (BufferedConn) UnreadByte 

func (b BufferedConn) UnreadByte() error

type Checker 

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

func NewChecker 

func NewChecker(timeout int, interval int64, blockedFile, directFile string, log *logger.Logger) Checker

NewChecker args: timeout : tcp timeout milliseconds ,connect to host interval: recheck domain interval seconds

func (*Checker) Add 

func (c *Checker) Add(key, address string)

func (*Checker) IsBlocked 

func (c *Checker) IsBlocked(address string) (blocked bool, failN, successN uint)

func (*Checker) Stop 

func (c *Checker) Stop()

type CheckerItem 

type CheckerItem struct {
	IsHTTPS      bool
	Method       string
	URL          string
	Domain       string
	Host         string
	Data         []byte
	SuccessCount uint
	FailCount    uint
	Key          string
}

type ClientKeyRouter 

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

func NewClientKeyRouter 

func NewClientKeyRouter(ctrl *ConcurrentMap, size int) ClientKeyRouter

func (*ClientKeyRouter) GetKey 

func (c *ClientKeyRouter) GetKey() string

type CompStream 

type CompStream struct {
	net.Conn
	// contains filtered or unexported fields
}

func NewCompStream 

func NewCompStream(conn net.Conn) *CompStream

func (*CompStream) Close 

func (c *CompStream) Close() error

func (*CompStream) LocalAddr 

func (c *CompStream) LocalAddr() net.Addr

func (*CompStream) Read 

func (c *CompStream) Read(p []byte) (n int, err error)

func (*CompStream) RemoteAddr 

func (c *CompStream) RemoteAddr() net.Addr

func (*CompStream) SetDeadline 

func (c *CompStream) SetDeadline(t time.Time) error

func (*CompStream) SetReadDeadline 

func (c *CompStream) SetReadDeadline(t time.Time) error

func (*CompStream) SetWriteDeadline 

func (c *CompStream) SetWriteDeadline(t time.Time) error

func (*CompStream) Write 

func (c *CompStream) Write(p []byte) (n int, err error)

type ConcurrentMap 

type ConcurrentMap []*ConcurrentMapShared

A "thread" safe map of type string:Anything. To avoid lock bottlenecks this map is dived to several (SHARD_COUNT) map shards.

func NewConcurrentMap 

func NewConcurrentMap() ConcurrentMap

Creates a new concurrent map.

func (ConcurrentMap) Count 

func (m ConcurrentMap) Count() int

Returns the number of elements within the map.

func (ConcurrentMap) Get 

func (m ConcurrentMap) Get(key string) (interface{}, bool)

Retrieves an element from map under given key.

func (ConcurrentMap) GetShard 

func (m ConcurrentMap) GetShard(key string) *ConcurrentMapShared

Returns shard under given key

func (ConcurrentMap) Has 

func (m ConcurrentMap) Has(key string) bool

Looks up an item under specified key

func (ConcurrentMap) IsEmpty 

func (m ConcurrentMap) IsEmpty() bool

Checks if map is empty.

func (ConcurrentMap) Items 

func (m ConcurrentMap) Items() map[string]interface{}

Returns all items as map[string]interface{}

func (ConcurrentMap) Iter deprecated 

func (m ConcurrentMap) Iter() <-chan Tuple

Returns an iterator which could be used in a for range loop.

Deprecated: using IterBuffered() will get a better performence

func (ConcurrentMap) IterBuffered 

func (m ConcurrentMap) IterBuffered() <-chan Tuple

Returns a buffered iterator which could be used in a for range loop.

func (ConcurrentMap) IterCb 

func (m ConcurrentMap) IterCb(fn IterCb)

Callback based iterator, cheapest way to read all elements in a map.

func (ConcurrentMap) Keys 

func (m ConcurrentMap) Keys() []string

Return all keys as []string

func (ConcurrentMap) MSet 

func (m ConcurrentMap) MSet(data map[string]interface{})

func (ConcurrentMap) MarshalJSON 

func (m ConcurrentMap) MarshalJSON() ([]byte, error)

Reviles ConcurrentMap "private" variables to json marshal.

func (ConcurrentMap) Pop 

func (m ConcurrentMap) Pop(key string) (v interface{}, exists bool)

Removes an element from the map and returns it

func (ConcurrentMap) Remove 

func (m ConcurrentMap) Remove(key string)

Removes an element from the map.

func (ConcurrentMap) Set 

func (m ConcurrentMap) Set(key string, value interface{})

Sets the given value under the specified key.

func (ConcurrentMap) SetIfAbsent 

func (m ConcurrentMap) SetIfAbsent(key string, value interface{}) bool

Sets the given value under the specified key if no value was associated with it.

func (ConcurrentMap) Upsert 

func (m ConcurrentMap) Upsert(key string, value interface{}, cb UpsertCb) (res interface{})

Insert or Update - updates existing element or inserts a new one using UpsertCb

type ConcurrentMapShared 

type ConcurrentMapShared struct {
	sync.RWMutex // Read Write mutex, guards access to internal map.
	// contains filtered or unexported fields
}

A "thread" safe string to anything map.

type ConnManager 

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

func NewConnManager 

func NewConnManager(log *logger.Logger) ConnManager

func (*ConnManager) Add 

func (cm *ConnManager) Add(key, ID string, conn *net.Conn)

func (*ConnManager) Remove 

func (cm *ConnManager) Remove(key string)

func (*ConnManager) RemoveAll 

func (cm *ConnManager) RemoveAll()

func (*ConnManager) RemoveOne 

func (cm *ConnManager) RemoveOne(key string, ID string)

type DomainResolver 

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

func NewDomainResolver 

func NewDomainResolver(dnsAddrress string, ttl int, log *logger.Logger) DomainResolver

func (*DomainResolver) MustResolve 

func (a *DomainResolver) MustResolve(address string) (ip string)

func (*DomainResolver) PrintData 

func (a *DomainResolver) PrintData()

func (*DomainResolver) Resolve 

func (a *DomainResolver) Resolve(address string) (ip string, err error)

type DomainResolverItem 

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

type HTTPRequest 

type HTTPRequest struct {
	HeadBuf []byte

	Host   string
	Method string
	URL    string
	// contains filtered or unexported fields
}

func NewHTTPRequest 

func NewHTTPRequest(inConn *net.Conn, bufSize int, isBasicAuth bool, basicAuth *BasicAuth, log *logger.Logger, header ...[]byte) (req HTTPRequest, err error)

func (*HTTPRequest) BasicAuth 

func (req *HTTPRequest) BasicAuth() (err error)

func (*HTTPRequest) GetAuthDataStr 

func (req *HTTPRequest) GetAuthDataStr() (basicInfo string, err error)

func (*HTTPRequest) HTTP 

func (req *HTTPRequest) HTTP() (err error)

func (*HTTPRequest) HTTPS 

func (req *HTTPRequest) HTTPS() (err error)

func (*HTTPRequest) HTTPSReply 

func (req *HTTPRequest) HTTPSReply() (err error)

func (*HTTPRequest) IsHTTPS 

func (req *HTTPRequest) IsHTTPS() bool

type IterCb 

type IterCb func(key string, v interface{})

Iterator callback,called for every key,value found in maps. RLock is held for all calls for a given shard therefore callback sess consistent view of a shard, but not across the shards

type LeakyBuf 

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

func NewLeakyBuf 

func NewLeakyBuf(n, bufSize int) *LeakyBuf

NewLeakyBuf creates a leaky buffer which can hold at most n buffer, each with bufSize bytes.

func (*LeakyBuf) Get 

func (lb *LeakyBuf) Get() (b []byte)

Get returns a buffer from the leaky buffer or create a new buffer.

func (*LeakyBuf) Put 

func (lb *LeakyBuf) Put(b []byte)

Put add the buffer into the free buffer pool for reuse. Panic if the buffer size is not the same with the leaky buffer's. This is intended to expose error usage of leaky buffer.

type OutConn 

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

func NewOutConn 

func NewOutConn(dur int, typ string, kcp kcpcfg.KCPConfigArgs, certBytes, keyBytes, caCertBytes []byte, address string, timeout int) (op OutConn)

func (*OutConn) Get 

func (op *OutConn) Get() (conn net.Conn, err error)

type Reader 

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

func NewReader 

func NewReader(r io.Reader) *Reader

NewReader returns a reader that implements io.Reader with rate limiting.

func NewReaderWithContext 

func NewReaderWithContext(r io.Reader, ctx context.Context) *Reader

NewReaderWithContext returns a reader that implements io.Reader with rate limiting.

func (*Reader) Read 

func (s *Reader) Read(p []byte) (int, error)

Read reads bytes into p.

func (*Reader) SetRateLimit 

func (s *Reader) SetRateLimit(bytesPerSec float64)

SetRateLimit sets rate limit (bytes/sec) to the reader.

type ServerChannel 

type ServerChannel struct {
	Listener    *net.Listener
	UDPListener *net.UDPConn
	// contains filtered or unexported fields
}

func NewServerChannel 

func NewServerChannel(ip string, port int, log *logger.Logger) ServerChannel

func NewServerChannelHost 

func NewServerChannelHost(host string, log *logger.Logger) ServerChannel

func (*ServerChannel) ListenKCP 

func (sc *ServerChannel) ListenKCP(config kcpcfg.KCPConfigArgs, fn func(conn net.Conn), log *logger.Logger) (err error)

func (*ServerChannel) ListenTCP 

func (sc *ServerChannel) ListenTCP(fn func(conn net.Conn)) (err error)

func (*ServerChannel) ListenTls 

func (sc *ServerChannel) ListenTls(certBytes, keyBytes, caCertBytes []byte, fn func(conn net.Conn)) (err error)

func (*ServerChannel) ListenUDP 

func (sc *ServerChannel) ListenUDP(fn func(packet []byte, localAddr, srcAddr *net.UDPAddr)) (err error)

func (*ServerChannel) SetErrAcceptHandler 

func (sc *ServerChannel) SetErrAcceptHandler(fn func(err error))

type Tuple 

type Tuple struct {
	Key string
	Val interface{}
}

Used by the Iter & IterBuffered functions to wrap two variables together over a channel,

type UpsertCb 

type UpsertCb func(exist bool, valueInMap interface{}, newValue interface{}) interface{}

Callback to return new element to be inserted into the map It is called while lock is held, therefore it MUST NOT try to access other keys in same map, as it can lead to deadlock since Go sync.RWLock is not reentrant

type Writer 

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

func NewWriter 

func NewWriter(w io.Writer) *Writer

NewWriter returns a writer that implements io.Writer with rate limiting.

func NewWriterWithContext 

func NewWriterWithContext(w io.Writer, ctx context.Context) *Writer

NewWriterWithContext returns a writer that implements io.Writer with rate limiting.

func (*Writer) SetRateLimit 

func (s *Writer) SetRateLimit(bytesPerSec float64)

SetRateLimit sets rate limit (bytes/sec) to the writer.

func (*Writer) Write 

func (s *Writer) Write(p []byte) (int, error)

Write writes bytes from p.

Source Files

View all Source files

Directories

Path Synopsis
Package xid is a globally unique id generator suited for web scale Xid is using Mongo Object ID algorithm to generate globally unique ids: https://docs.mongodb.org/manual/reference/object-id/ - 4-byte value representing the seconds since the Unix epoch, - 3-byte machine identifier, - 2-byte process id, and - 3-byte counter, starting with a random value.
 Package xid is a globally unique id generator suited for web scale Xid is using Mongo Object ID algorithm to generate globally unique ids: https://docs.mongodb.org/manual/reference/object-id/ - 4-byte value representing the seconds since the Unix epoch, - 3-byte machine identifier, - 2-byte process id, and - 3-byte counter, starting with a random value.

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