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chore: use fastrand to replace math/rand

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This commit is contained in:
wwqgtxx 2023-03-06 18:10:14 +08:00
parent ad6336231c
commit 6a97ab9ecb
26 changed files with 109 additions and 111 deletions
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6
common/convert/util.go
View file

@ -2,7 +2,6 @@ package convert
import (
"encoding/base64"
"math/rand"
"net/http"
"strings"
"time"
@ -10,6 +9,7 @@ import (
"github.com/Dreamacro/clash/common/utils"
"github.com/metacubex/sing-shadowsocks/shadowimpl"
"github.com/zhangyunhao116/fastrand"
)
var hostsSuffix = []string{
@ -303,11 +303,11 @@ func RandHost() string {
prefix += string(buf[6:8]) + "-"
prefix += string(buf[len(buf)-8:])
return prefix + hostsSuffix[rand.Intn(hostsLen)]
return prefix + hostsSuffix[fastrand.Intn(hostsLen)]
}
func RandUserAgent() string {
return userAgents[rand.Intn(uaLen)]
return userAgents[fastrand.Intn(uaLen)]
}
func SetUserAgent(header http.Header) {

4
common/pool/alloc_test.go
View file

@ -1,10 +1,10 @@
package pool
import (
"math/rand"
"testing"
"github.com/stretchr/testify/assert"
"github.com/zhangyunhao116/fastrand"
)
func TestAllocGet(t *testing.T) {
@ -43,6 +43,6 @@ func TestAllocPutThenGet(t *testing.T) {
func BenchmarkMSB(b *testing.B) {
for i := 0; i < b.N; i++ {
msb(rand.Int())
msb(fastrand.Int())
}
}

8
component/resolver/resolver.go
View file

@ -4,7 +4,6 @@ import (
"context"
"errors"
"fmt"
"math/rand"
"net"
"net/netip"
"strings"
@ -13,6 +12,7 @@ import (
"github.com/Dreamacro/clash/component/trie"
"github.com/miekg/dns"
"github.com/zhangyunhao116/fastrand"
)
var (
@ -96,7 +96,7 @@ func ResolveIPv4WithResolver(ctx context.Context, host string, r Resolver) (neti
} else if len(ips) == 0 {
return netip.Addr{}, fmt.Errorf("%w: %s", ErrIPNotFound, host)
}
return ips[rand.Intn(len(ips))], nil
return ips[fastrand.Intn(len(ips))], nil
}
// ResolveIPv4 with a host, return ipv4
@ -153,7 +153,7 @@ func ResolveIPv6WithResolver(ctx context.Context, host string, r Resolver) (neti
} else if len(ips) == 0 {
return netip.Addr{}, fmt.Errorf("%w: %s", ErrIPNotFound, host)
}
return ips[rand.Intn(len(ips))], nil
return ips[fastrand.Intn(len(ips))], nil
}
func ResolveIPv6(ctx context.Context, host string) (netip.Addr, error) {
@ -202,7 +202,7 @@ func ResolveIPWithResolver(ctx context.Context, host string, r Resolver) (netip.
} else if len(ips) == 0 {
return netip.Addr{}, fmt.Errorf("%w: %s", ErrIPNotFound, host)
}
return ips[rand.Intn(len(ips))], nil
return ips[fastrand.Intn(len(ips))], nil
}
// ResolveIP with a host, return ip

4
dns/client.go
View file

@ -4,7 +4,6 @@ import (
"context"
"crypto/tls"
"fmt"
"math/rand"
"net"
"net/netip"
"strings"
@ -16,6 +15,7 @@ import (
"github.com/Dreamacro/clash/component/resolver"
D "github.com/miekg/dns"
"github.com/zhangyunhao116/fastrand"
)
type client struct {
@ -68,7 +68,7 @@ func (c *client) ExchangeContext(ctx context.Context, m *D.Msg) (*D.Msg, error)
} else if len(ips) == 0 {
return nil, fmt.Errorf("%w: %s", resolver.ErrIPNotFound, c.host)
}
ip = ips[rand.Intn(len(ips))]
ip = ips[fastrand.Intn(len(ips))]
}
network := "udp"

8
dns/resolver.go
View file

@ -4,7 +4,6 @@ import (
"context"
"errors"
"fmt"
"math/rand"
"net/netip"
"strings"
"time"
@ -20,6 +19,7 @@ import (
"github.com/Dreamacro/clash/log"
D "github.com/miekg/dns"
"github.com/zhangyunhao116/fastrand"
"golang.org/x/sync/singleflight"
)
@ -113,7 +113,7 @@ func (r *Resolver) ResolveIP(ctx context.Context, host string) (ip netip.Addr, e
} else if len(ips) == 0 {
return netip.Addr{}, fmt.Errorf("%w: %s", resolver.ErrIPNotFound, host)
}
return ips[rand.Intn(len(ips))], nil
return ips[fastrand.Intn(len(ips))], nil
}
// LookupIPv4 request with TypeA
@ -129,7 +129,7 @@ func (r *Resolver) ResolveIPv4(ctx context.Context, host string) (ip netip.Addr,
} else if len(ips) == 0 {
return netip.Addr{}, fmt.Errorf("%w: %s", resolver.ErrIPNotFound, host)
}
return ips[rand.Intn(len(ips))], nil
return ips[fastrand.Intn(len(ips))], nil
}
// LookupIPv6 request with TypeAAAA
@ -145,7 +145,7 @@ func (r *Resolver) ResolveIPv6(ctx context.Context, host string) (ip netip.Addr,
} else if len(ips) == 0 {
return netip.Addr{}, fmt.Errorf("%w: %s", resolver.ErrIPNotFound, host)
}
return ips[rand.Intn(len(ips))], nil
return ips[fastrand.Intn(len(ips))], nil
}
func (r *Resolver) shouldIPFallback(ip netip.Addr) bool {

7
transport/hysteria/conns/udp/hop.go
View file

@ -2,7 +2,6 @@ package udp
import (
"errors"
"math/rand"
"net"
"strconv"
"strings"
@ -12,6 +11,8 @@ import (
"github.com/Dreamacro/clash/transport/hysteria/obfs"
"github.com/Dreamacro/clash/transport/hysteria/utils"
"github.com/zhangyunhao116/fastrand"
)
const (
@ -85,7 +86,7 @@ func NewObfsUDPHopClientPacketConn(server string, serverPorts string, hopInterva
serverAddrs: serverAddrs,
hopInterval: hopInterval,
obfs: obfs,
addrIndex: rand.Intn(len(serverAddrs)),
addrIndex: fastrand.Intn(len(serverAddrs)),
recvQueue: make(chan *udpPacket, packetQueueSize),
closeChan: make(chan struct{}),
bufPool: sync.Pool{
@ -176,7 +177,7 @@ func (c *ObfsUDPHopClientPacketConn) hop(dialer utils.PacketDialer, rAddr net.Ad
_ = trySetPacketConnWriteBuffer(c.currentConn, c.writeBufferSize)
}
go c.recvRoutine(c.currentConn)
c.addrIndex = rand.Intn(len(c.serverAddrs))
c.addrIndex = fastrand.Intn(len(c.serverAddrs))
}
func (c *ObfsUDPHopClientPacketConn) ReadFrom(b []byte) (int, net.Addr, error) {

10
transport/hysteria/conns/wechat/obfs.go
View file

@ -2,12 +2,14 @@ package wechat
import (
"encoding/binary"
"github.com/Dreamacro/clash/log"
"github.com/Dreamacro/clash/transport/hysteria/obfs"
"math/rand"
"net"
"sync"
"time"
"github.com/Dreamacro/clash/log"
"github.com/Dreamacro/clash/transport/hysteria/obfs"
"github.com/zhangyunhao116/fastrand"
)
const udpBufferSize = 65535
@ -29,7 +31,7 @@ func NewObfsWeChatUDPConn(orig net.PacketConn, obfs obfs.Obfuscator) *ObfsWeChat
obfs: obfs,
readBuf: make([]byte, udpBufferSize),
writeBuf: make([]byte, udpBufferSize),
sn: rand.Uint32() & 0xFFFF,
sn: fastrand.Uint32() & 0xFFFF,
}
}

12
transport/hysteria/core/client.go
View file

@ -6,20 +6,20 @@ import (
"crypto/tls"
"errors"
"fmt"
"math/rand"
"net"
"strconv"
"sync"
"time"
"github.com/lunixbochs/struc"
"github.com/metacubex/quic-go"
"github.com/metacubex/quic-go/congestion"
"github.com/Dreamacro/clash/transport/hysteria/obfs"
"github.com/Dreamacro/clash/transport/hysteria/pmtud_fix"
"github.com/Dreamacro/clash/transport/hysteria/transport"
"github.com/Dreamacro/clash/transport/hysteria/utils"
"github.com/lunixbochs/struc"
"github.com/metacubex/quic-go"
"github.com/metacubex/quic-go/congestion"
"github.com/zhangyunhao116/fastrand"
)
var (
@ -408,7 +408,7 @@ func (c *quicPktConn) WriteTo(p []byte, addr string) error {
if err != nil {
if errSize, ok := err.(quic.ErrMessageTooLarge); ok {
// need to frag
msg.MsgID = uint16(rand.Intn(0xFFFF)) + 1 // msgID must be > 0 when fragCount > 1
msg.MsgID = uint16(fastrand.Intn(0xFFFF)) + 1 // msgID must be > 0 when fragCount > 1
fragMsgs := fragUDPMessage(msg, int(errSize))
for _, fragMsg := range fragMsgs {
msgBuf.Reset()

13
transport/hysteria/obfs/xplus.go
View file

@ -2,9 +2,8 @@ package obfs
import (
"crypto/sha256"
"math/rand"
"sync"
"time"
"github.com/zhangyunhao116/fastrand"
)
// [salt][obfuscated payload]
@ -13,15 +12,11 @@ const saltLen = 16
type XPlusObfuscator struct {
Key []byte
RandSrc *rand.Rand
lk sync.Mutex
}
func NewXPlusObfuscator(key []byte) *XPlusObfuscator {
return &XPlusObfuscator{
Key: key,
RandSrc: rand.New(rand.NewSource(time.Now().UnixNano())),
}
}
@ -40,9 +35,7 @@ func (x *XPlusObfuscator) Deobfuscate(in []byte, out []byte) int {
}
func (x *XPlusObfuscator) Obfuscate(in []byte, out []byte) int {
x.lk.Lock()
_, _ = x.RandSrc.Read(out[:saltLen]) // salt
x.lk.Unlock()
_, _ = fastrand.Read(out[:saltLen]) // salt
// Obfuscate the payload
key := sha256.Sum256(append(x.Key, out[:saltLen]...))
for i, c := range in {

7
transport/simple-obfs/http.go
View file

@ -5,11 +5,12 @@ import (
"encoding/base64"
"fmt"
"io"
"math/rand"
"net"
"net/http"
"github.com/Dreamacro/clash/common/pool"
"github.com/zhangyunhao116/fastrand"
)
// HTTPObfs is shadowsocks http simple-obfs implementation
@ -63,9 +64,9 @@ func (ho *HTTPObfs) Read(b []byte) (int, error) {
func (ho *HTTPObfs) Write(b []byte) (int, error) {
if ho.firstRequest {
randBytes := make([]byte, 16)
rand.Read(randBytes)
fastrand.Read(randBytes)
req, _ := http.NewRequest("GET", fmt.Sprintf("http://%s/", ho.host), bytes.NewBuffer(b[:]))
req.Header.Set("User-Agent", fmt.Sprintf("curl/7.%d.%d", rand.Int()%54, rand.Int()%2))
req.Header.Set("User-Agent", fmt.Sprintf("curl/7.%d.%d", fastrand.Int()%54, fastrand.Int()%2))
req.Header.Set("Upgrade", "websocket")
req.Header.Set("Connection", "Upgrade")
req.Host = ho.host

11
transport/simple-obfs/tls.go
View file

@ -4,16 +4,13 @@ import (
"bytes"
"encoding/binary"
"io"
"math/rand"
"net"
"time"
"github.com/Dreamacro/clash/common/pool"
)
func init() {
rand.Seed(time.Now().Unix())
}
"github.com/zhangyunhao116/fastrand"
)
const (
chunkSize = 1 << 14 // 2 ** 14 == 16 * 1024
@ -130,8 +127,8 @@ func NewTLSObfs(conn net.Conn, server string) net.Conn {
func makeClientHelloMsg(data []byte, server string) []byte {
random := make([]byte, 28)
sessionID := make([]byte, 32)
rand.Read(random)
rand.Read(sessionID)
fastrand.Read(random)
fastrand.Read(sessionID)
buf := &bytes.Buffer{}

11
transport/ssr/obfs/http_simple.go
View file

@ -4,12 +4,13 @@ import (
"bytes"
"encoding/hex"
"io"
"math/rand"
"net"
"strconv"
"strings"
"github.com/Dreamacro/clash/common/pool"
"github.com/zhangyunhao116/fastrand"
)
func init() {
@ -81,7 +82,7 @@ func (c *httpConn) Write(b []byte) (int, error) {
bLength := len(b)
headDataLength := bLength
if bLength-headLength > 64 {
headDataLength = headLength + rand.Intn(65)
headDataLength = headLength + fastrand.Intn(65)
}
headData := b[:headDataLength]
b = b[headDataLength:]
@ -99,7 +100,7 @@ func (c *httpConn) Write(b []byte) (int, error) {
}
}
hosts := strings.Split(host, ",")
host = hosts[rand.Intn(len(hosts))]
host = hosts[fastrand.Intn(len(hosts))]
buf := pool.GetBuffer()
defer pool.PutBuffer(buf)
@ -118,7 +119,7 @@ func (c *httpConn) Write(b []byte) (int, error) {
buf.WriteString(body + "\r\n\r\n")
} else {
buf.WriteString("User-Agent: ")
buf.WriteString(userAgent[rand.Intn(len(userAgent))])
buf.WriteString(userAgent[fastrand.Intn(len(userAgent))])
buf.WriteString("\r\nAccept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\r\nAccept-Language: en-US,en;q=0.8\r\nAccept-Encoding: gzip, deflate\r\n")
if c.post {
packBoundary(buf)
@ -146,7 +147,7 @@ func packBoundary(buf *bytes.Buffer) {
buf.WriteString("Content-Type: multipart/form-data; boundary=")
set := "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789"
for i := 0; i < 32; i++ {
buf.WriteByte(set[rand.Intn(62)])
buf.WriteByte(set[fastrand.Intn(62)])
}
buf.WriteString("\r\n")
}

7
transport/ssr/obfs/random_head.go
View file

@ -3,10 +3,11 @@ package obfs
import (
"encoding/binary"
"hash/crc32"
"math/rand"
"net"
"github.com/Dreamacro/clash/common/pool"
"github.com/zhangyunhao116/fastrand"
)
func init() {
@ -53,10 +54,10 @@ func (c *randomHeadConn) Write(b []byte) (int, error) {
c.buf = append(c.buf, b...)
if !c.hasSentHeader {
c.hasSentHeader = true
dataLength := rand.Intn(96) + 4
dataLength := fastrand.Intn(96) + 4
buf := pool.Get(dataLength + 4)
defer pool.Put(buf)
rand.Read(buf[:dataLength])
fastrand.Read(buf[:dataLength])
binary.LittleEndian.PutUint32(buf[dataLength:], 0xffffffff-crc32.ChecksumIEEE(buf[:dataLength]))
_, err := c.Conn.Write(buf)
return len(b), err

11
transport/ssr/obfs/tls1.2_ticket_auth.go
View file

@ -4,13 +4,14 @@ import (
"bytes"
"crypto/hmac"
"encoding/binary"
"math/rand"
"net"
"strings"
"time"
"github.com/Dreamacro/clash/common/pool"
"github.com/Dreamacro/clash/transport/ssr/tools"
"github.com/zhangyunhao116/fastrand"
)
func init() {
@ -25,7 +26,7 @@ type tls12Ticket struct {
func newTLS12Ticket(b *Base) Obfs {
r := &tls12Ticket{Base: b, authData: &authData{}}
rand.Read(r.clientID[:])
fastrand.Read(r.clientID[:])
return r
}
@ -90,7 +91,7 @@ func (c *tls12TicketConn) Write(b []byte) (int, error) {
buf := pool.GetBuffer()
defer pool.PutBuffer(buf)
for len(b) > 2048 {
size := rand.Intn(4096) + 100
size := fastrand.Intn(4096) + 100
if len(b) < size {
size = len(b)
}
@ -196,7 +197,7 @@ func packSNIData(buf *bytes.Buffer, u string) {
}
func (c *tls12TicketConn) packTicketBuf(buf *bytes.Buffer, u string) {
length := 16 * (rand.Intn(17) + 8)
length := 16 * (fastrand.Intn(17) + 8)
buf.Write([]byte{0, 0x23})
binary.Write(buf, binary.BigEndian, uint16(length))
tools.AppendRandBytes(buf, length)
@ -221,6 +222,6 @@ func (t *tls12Ticket) getHost() string {
host = ""
}
hosts := strings.Split(host, ",")
host = hosts[rand.Intn(len(hosts))]
host = hosts[fastrand.Intn(len(hosts))]
return host
}

17
transport/ssr/protocol/auth_aes128_sha1.go
View file

@ -4,7 +4,6 @@ import (
"bytes"
"encoding/binary"
"math"
"math/rand"
"net"
"strconv"
"strings"
@ -12,6 +11,8 @@ import (
"github.com/Dreamacro/clash/common/pool"
"github.com/Dreamacro/clash/log"
"github.com/Dreamacro/clash/transport/ssr/tools"
"github.com/zhangyunhao116/fastrand"
)
type (
@ -64,7 +65,7 @@ func (a *authAES128) initUserData() {
}
if len(a.userKey) == 0 {
a.userKey = a.Key
rand.Read(a.userID[:])
fastrand.Read(a.userID[:])
}
}
@ -198,7 +199,7 @@ func (a *authAES128) packData(poolBuf *bytes.Buffer, data []byte, fullDataLength
}
func trapezoidRandom(max int, d float64) int {
base := rand.Float64()
base := fastrand.Float64()
if d-0 > 1e-6 {
a := 1 - d
base = (math.Sqrt(a*a+4*d*base) - a) / (2 * d)
@ -219,10 +220,10 @@ func (a *authAES128) getRandDataLengthForPackData(dataLength, fullDataLength int
if revLength > -1460 {
return trapezoidRandom(revLength+1460, -0.3)
}
return rand.Intn(32)
return fastrand.Intn(32)
}
if dataLength > 900 {
return rand.Intn(revLength)
return fastrand.Intn(revLength)
}
return trapezoidRandom(revLength, -0.3)
}
@ -247,7 +248,7 @@ func (a *authAES128) packAuthData(poolBuf *bytes.Buffer, data []byte) {
copy(macKey, a.iv)
copy(macKey[len(a.iv):], a.Key)
poolBuf.WriteByte(byte(rand.Intn(256)))
poolBuf.WriteByte(byte(fastrand.Intn(256)))
poolBuf.Write(a.hmac(macKey, poolBuf.Bytes())[:6])
poolBuf.Write(a.userID[:])
err := a.authData.putEncryptedData(poolBuf, a.userKey, [2]int{packedAuthDataLength, randDataLength}, a.salt)
@ -263,9 +264,9 @@ func (a *authAES128) packAuthData(poolBuf *bytes.Buffer, data []byte) {
func (a *authAES128) getRandDataLengthForPackAuthData(size int) int {
if size > 400 {
return rand.Intn(512)
return fastrand.Intn(512)
}
return rand.Intn(1024)
return fastrand.Intn(1024)
}
func (a *authAES128) packRandData(poolBuf *bytes.Buffer, size int) {

7
transport/ssr/protocol/auth_sha1_v4.go
View file

@ -5,11 +5,12 @@ import (
"encoding/binary"
"hash/adler32"
"hash/crc32"
"math/rand"
"net"
"github.com/Dreamacro/clash/common/pool"
"github.com/Dreamacro/clash/transport/ssr/tools"
"github.com/zhangyunhao116/fastrand"
)
func init() {
@ -176,7 +177,7 @@ func (a *authSHA1V4) getRandDataLength(size int) int {
return 0
}
if size > 400 {
return rand.Intn(256)
return fastrand.Intn(256)
}
return rand.Intn(512)
return fastrand.Intn(512)
}

7
transport/ssr/protocol/base.go
View file

@ -6,13 +6,14 @@ import (
"crypto/cipher"
"encoding/base64"
"encoding/binary"
"math/rand"
"sync"
"time"
"github.com/Dreamacro/clash/common/pool"
"github.com/Dreamacro/clash/log"
"github.com/Dreamacro/clash/transport/shadowsocks/core"
"github.com/zhangyunhao116/fastrand"
)
type Base struct {
@ -37,8 +38,8 @@ func (a *authData) next() *authData {
a.mutex.Lock()
defer a.mutex.Unlock()
if a.connectionID > 0xff000000 || a.connectionID == 0 {
rand.Read(a.clientID[:])
a.connectionID = rand.Uint32() & 0xffffff
fastrand.Read(a.clientID[:])
a.connectionID = fastrand.Uint32() & 0xffffff
}
a.connectionID++
copy(r.clientID[:], a.clientID[:])

5
transport/ssr/protocol/protocol.go
View file

@ -4,8 +4,9 @@ import (
"bytes"
"errors"
"fmt"
"math/rand"
"net"
"github.com/zhangyunhao116/fastrand"
)
var (
@ -68,7 +69,7 @@ func getHeadSize(b []byte, defaultValue int) int {
func getDataLength(b []byte) int {
bLength := len(b)
dataLength := getHeadSize(b, 30) + rand.Intn(32)
dataLength := getHeadSize(b, 30) + fastrand.Intn(32)
if bLength < dataLength {
return bLength
}

8
transport/tuic/client.go
View file

@ -6,19 +6,19 @@ import (
"context"
"crypto/tls"
"errors"
"math/rand"
"net"
"runtime"
"sync"
"sync/atomic"
"time"
"github.com/metacubex/quic-go"
N "github.com/Dreamacro/clash/common/net"
"github.com/Dreamacro/clash/common/pool"
C "github.com/Dreamacro/clash/constant"
"github.com/Dreamacro/clash/log"
"github.com/metacubex/quic-go"
"github.com/zhangyunhao116/fastrand"
)
var (
@ -352,7 +352,7 @@ func (t *clientImpl) ListenPacketWithDialer(ctx context.Context, metadata *C.Met
pipe1, pipe2 := net.Pipe()
var connId uint32
for {
connId = rand.Uint32()
connId = fastrand.Uint32()
_, loaded := t.udpInputMap.LoadOrStore(connId, pipe1)
if !loaded {
break

4
transport/tuic/congestion/bbr_sender.go
View file

@ -5,11 +5,11 @@ package congestion
import (
"fmt"
"math"
"math/rand"
"net"
"time"
"github.com/metacubex/quic-go/congestion"
"github.com/zhangyunhao116/fastrand"
)
const (
@ -780,7 +780,7 @@ func (b *bbrSender) EnterProbeBandwidthMode(now time.Time) {
// Pick a random offset for the gain cycle out of {0, 2..7} range. 1 is
// excluded because in that case increased gain and decreased gain would not
// follow each other.
b.cycleCurrentOffset = rand.Int() % (GainCycleLength - 1)
b.cycleCurrentOffset = fastrand.Int() % (GainCycleLength - 1)
if b.cycleCurrentOffset >= 1 {
b.cycleCurrentOffset += 1
}

11
transport/vless/vision.go
View file

@ -3,12 +3,11 @@ package vless
import (
"bytes"
"encoding/binary"
"math/rand"
"github.com/Dreamacro/clash/common/buf"
"github.com/Dreamacro/clash/log"
"github.com/gofrs/uuid"
"github.com/zhangyunhao116/fastrand"
)
const (
@ -24,9 +23,9 @@ func WriteWithPadding(buffer *buf.Buffer, p []byte, command byte, userUUID *uuid
var paddingLen int32
if contentLen < 900 && paddingTLS {
log.Debugln("long padding")
paddingLen = rand.Int31n(500) + 900 - contentLen
paddingLen = fastrand.Int31n(500) + 900 - contentLen
} else {
paddingLen = rand.Int31n(256)
paddingLen = fastrand.Int31n(256)
}
if paddingLen > buf.BufferSize-21-contentLen {
paddingLen = buf.BufferSize - 21 - contentLen
@ -48,9 +47,9 @@ func ApplyPadding(buffer *buf.Buffer, command byte, userUUID *uuid.UUID, padding
var paddingLen int32
if contentLen < 900 && paddingTLS {
log.Debugln("long padding")
paddingLen = rand.Int31n(500) + 900 - contentLen
paddingLen = fastrand.Int31n(500) + 900 - contentLen
} else {
paddingLen = rand.Int31n(256)
paddingLen = fastrand.Int31n(256)
}
if paddingLen > buf.BufferSize-21-contentLen {
paddingLen = buf.BufferSize - 21 - contentLen

12
transport/vmess/conn.go
View file

@ -11,17 +11,13 @@ import (
"errors"
"hash/fnv"
"io"
"math/rand"
"net"
"time"
"github.com/zhangyunhao116/fastrand"
"golang.org/x/crypto/chacha20poly1305"
)
func init() {
rand.Seed(time.Now().UnixNano())
}
// Conn wrapper a net.Conn with vmess protocol
type Conn struct {
net.Conn
@ -76,7 +72,7 @@ func (vc *Conn) sendRequest() error {
buf.WriteByte(vc.respV)
buf.WriteByte(OptionChunkStream)
p := rand.Intn(16)
p := fastrand.Intn(16)
// P Sec Reserve Cmd
buf.WriteByte(byte(p<<4) | byte(vc.security))
buf.WriteByte(0)
@ -94,7 +90,7 @@ func (vc *Conn) sendRequest() error {
// padding
if p > 0 {
padding := make([]byte, p)
rand.Read(padding)
fastrand.Read(padding)
buf.Write(padding)
}
@ -200,7 +196,7 @@ func hashTimestamp(t time.Time) []byte {
// newConn return a Conn instance
func newConn(conn net.Conn, id *ID, dst *DstAddr, security Security, isAead bool) (*Conn, error) {
randBytes := make([]byte, 33)
rand.Read(randBytes)
fastrand.Read(randBytes)
reqBodyIV := make([]byte, 16)
reqBodyKey := make([]byte, 16)
copy(reqBodyIV[:], randBytes[:16])

4
transport/vmess/h2.go
View file

@ -2,11 +2,11 @@ package vmess
import (
"io"
"math/rand"
"net"
"net/http"
"net/url"
"github.com/zhangyunhao116/fastrand"
"golang.org/x/net/http2"
)
@ -26,7 +26,7 @@ type H2Config struct {
func (hc *h2Conn) establishConn() error {
preader, pwriter := io.Pipe()
host := hc.cfg.Hosts[rand.Intn(len(hc.cfg.Hosts))]
host := hc.cfg.Hosts[fastrand.Intn(len(hc.cfg.Hosts))]
path := hc.cfg.Path
// TODO: connect use VMess Host instead of H2 Host
req := http.Request{

9
transport/vmess/http.go
View file

@ -4,10 +4,11 @@ import (
"bufio"
"bytes"
"fmt"
"math/rand"
"net"
"net/http"
"net/textproto"
"github.com/zhangyunhao116/fastrand"
)
type httpConn struct {
@ -51,16 +52,16 @@ func (hc *httpConn) Write(b []byte) (int, error) {
return hc.Conn.Write(b)
}
path := hc.cfg.Path[rand.Intn(len(hc.cfg.Path))]
path := hc.cfg.Path[fastrand.Intn(len(hc.cfg.Path))]
host := hc.cfg.Host
if header := hc.cfg.Headers["Host"]; len(header) != 0 {
host = header[rand.Intn(len(header))]
host = header[fastrand.Intn(len(header))]
}
u := fmt.Sprintf("http://%s%s", host, path)
req, _ := http.NewRequest("GET", u, bytes.NewBuffer(b))
for key, list := range hc.cfg.Headers {
req.Header.Set(key, list[rand.Intn(len(list))])
req.Header.Set(key, list[fastrand.Intn(len(list))])
}
req.ContentLength = int64(len(b))
if err := req.Write(hc.Conn); err != nil {

7
transport/vmess/vmess.go
View file

@ -2,12 +2,13 @@ package vmess
import (
"fmt"
"github.com/Dreamacro/clash/common/utils"
"math/rand"
"net"
"runtime"
"github.com/Dreamacro/clash/common/utils"
"github.com/gofrs/uuid"
"github.com/zhangyunhao116/fastrand"
)
// Version of vmess
@ -77,7 +78,7 @@ type Config struct {
// StreamConn return a Conn with net.Conn and DstAddr
func (c *Client) StreamConn(conn net.Conn, dst *DstAddr) (net.Conn, error) {
r := rand.Intn(len(c.user))
r := fastrand.Intn(len(c.user))
return newConn(conn, c.user[r], dst, c.security, c.isAead)
}

6
transport/vmess/websocket.go
View file

@ -8,9 +8,7 @@ import (
"encoding/binary"
"errors"
"fmt"
"io"
"math/rand"
"net"
"net/http"
"net/url"
@ -22,7 +20,9 @@ import (
"github.com/Dreamacro/clash/common/buf"
N "github.com/Dreamacro/clash/common/net"
tlsC "github.com/Dreamacro/clash/component/tls"
"github.com/gorilla/websocket"
"github.com/zhangyunhao116/fastrand"
)
type websocketConn struct {
@ -120,7 +120,7 @@ func (wsc *websocketConn) WriteBuffer(buffer *buf.Buffer) error {
binary.BigEndian.PutUint64(header[2:], uint64(dataLen))
}
maskKey := rand.Uint32()
maskKey := fastrand.Uint32()
binary.LittleEndian.PutUint32(header[1+payloadBitLength:], maskKey)
N.MaskWebSocket(maskKey, data)