forked from XTLS/Xray-core
/
io.go
144 lines (121 loc) · 3.03 KB
/
io.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
package buf
import (
"io"
"net"
"os"
"syscall"
"time"
"github.com/AikoPanel/Xray-core/features/stats"
"github.com/AikoPanel/Xray-core/transport/internet/stat"
)
// Reader extends io.Reader with MultiBuffer.
type Reader interface {
// ReadMultiBuffer reads content from underlying reader, and put it into a MultiBuffer.
ReadMultiBuffer() (MultiBuffer, error)
}
// ErrReadTimeout is an error that happens with IO timeout.
var ErrReadTimeout = newError("IO timeout")
// TimeoutReader is a reader that returns error if Read() operation takes longer than the given timeout.
type TimeoutReader interface {
ReadMultiBufferTimeout(time.Duration) (MultiBuffer, error)
}
// Writer extends io.Writer with MultiBuffer.
type Writer interface {
// WriteMultiBuffer writes a MultiBuffer into underlying writer.
WriteMultiBuffer(MultiBuffer) error
}
// WriteAllBytes ensures all bytes are written into the given writer.
func WriteAllBytes(writer io.Writer, payload []byte, c stats.Counter) error {
wc := 0
defer func() {
if c != nil {
c.Add(int64(wc))
}
}()
for len(payload) > 0 {
n, err := writer.Write(payload)
wc += n
if err != nil {
return err
}
payload = payload[n:]
}
return nil
}
func isPacketReader(reader io.Reader) bool {
_, ok := reader.(net.PacketConn)
return ok
}
// NewReader creates a new Reader.
// The Reader instance doesn't take the ownership of reader.
func NewReader(reader io.Reader) Reader {
if mr, ok := reader.(Reader); ok {
return mr
}
if isPacketReader(reader) {
return &PacketReader{
Reader: reader,
}
}
_, isFile := reader.(*os.File)
if !isFile && useReadv {
if sc, ok := reader.(syscall.Conn); ok {
rawConn, err := sc.SyscallConn()
if err != nil {
newError("failed to get sysconn").Base(err).WriteToLog()
} else {
var counter stats.Counter
if statConn, ok := reader.(*stat.CounterConnection); ok {
reader = statConn.Connection
counter = statConn.ReadCounter
}
return NewReadVReader(reader, rawConn, counter)
}
}
}
return &SingleReader{
Reader: reader,
}
}
// NewPacketReader creates a new PacketReader based on the given reader.
func NewPacketReader(reader io.Reader) Reader {
if mr, ok := reader.(Reader); ok {
return mr
}
return &PacketReader{
Reader: reader,
}
}
func isPacketWriter(writer io.Writer) bool {
if _, ok := writer.(net.PacketConn); ok {
return true
}
// If the writer doesn't implement syscall.Conn, it is probably not a TCP connection.
if _, ok := writer.(syscall.Conn); !ok {
return true
}
return false
}
// NewWriter creates a new Writer.
func NewWriter(writer io.Writer) Writer {
if mw, ok := writer.(Writer); ok {
return mw
}
iConn := writer
if statConn, ok := writer.(*stat.CounterConnection); ok {
iConn = statConn.Connection
}
if isPacketWriter(iConn) {
return &SequentialWriter{
Writer: writer,
}
}
var counter stats.Counter
if statConn, ok := writer.(*stat.CounterConnection); ok {
counter = statConn.WriteCounter
}
return &BufferToBytesWriter{
Writer: iConn,
counter: counter,
}
}