-
Notifications
You must be signed in to change notification settings - Fork 0
/
outbound.go
159 lines (131 loc) · 4.36 KB
/
outbound.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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
package outbound
import (
"net"
"sync"
"github.com/v2ray/v2ray-core/app"
v2io "github.com/v2ray/v2ray-core/common/io"
"github.com/v2ray/v2ray-core/common/log"
v2net "github.com/v2ray/v2ray-core/common/net"
proto "github.com/v2ray/v2ray-core/common/protocol"
raw "github.com/v2ray/v2ray-core/common/protocol/raw"
"github.com/v2ray/v2ray-core/proxy"
"github.com/v2ray/v2ray-core/proxy/internal"
vmessio "github.com/v2ray/v2ray-core/proxy/vmess/io"
"github.com/v2ray/v2ray-core/transport/ray"
)
type VMessOutboundHandler struct {
receiverManager *ReceiverManager
}
func (this *VMessOutboundHandler) Dispatch(firstPacket v2net.Packet, ray ray.OutboundRay) error {
vNextAddress, vNextUser := this.receiverManager.PickReceiver()
command := proto.RequestCommandTCP
if firstPacket.Destination().IsUDP() {
command = proto.RequestCommandUDP
}
request := &proto.RequestHeader{
Version: raw.Version,
User: vNextUser,
Command: command,
Address: firstPacket.Destination().Address(),
Port: firstPacket.Destination().Port(),
}
if command == proto.RequestCommandUDP {
request.Option |= proto.RequestOptionChunkStream
}
return this.startCommunicate(request, vNextAddress, ray, firstPacket)
}
func (this *VMessOutboundHandler) startCommunicate(request *proto.RequestHeader, dest v2net.Destination, ray ray.OutboundRay, firstPacket v2net.Packet) error {
var destIP net.IP
if dest.Address().IsIPv4() || dest.Address().IsIPv6() {
destIP = dest.Address().IP()
} else {
ips, err := net.LookupIP(dest.Address().Domain())
if err != nil {
return err
}
destIP = ips[0]
}
conn, err := net.DialTCP("tcp", nil, &net.TCPAddr{
IP: destIP,
Port: int(dest.Port()),
})
if err != nil {
log.Error("Failed to open ", dest, ": ", err)
if ray != nil {
ray.OutboundOutput().Close()
}
return err
}
log.Info("VMessOut: Tunneling request to ", request.Address, " via ", dest)
defer conn.Close()
input := ray.OutboundInput()
output := ray.OutboundOutput()
var requestFinish, responseFinish sync.Mutex
requestFinish.Lock()
responseFinish.Lock()
session := raw.NewClientSession(proto.DefaultIDHash)
go this.handleRequest(session, conn, request, firstPacket, input, &requestFinish)
go this.handleResponse(session, conn, request, dest, output, &responseFinish)
requestFinish.Lock()
conn.CloseWrite()
responseFinish.Lock()
output.Close()
input.Release()
return nil
}
func (this *VMessOutboundHandler) handleRequest(session *raw.ClientSession, conn net.Conn, request *proto.RequestHeader, firstPacket v2net.Packet, input v2io.Reader, finish *sync.Mutex) {
defer finish.Unlock()
writer := v2io.NewBufferedWriter(conn)
defer writer.Release()
session.EncodeRequestHeader(request, writer)
// Send first packet of payload together with request, in favor of small requests.
firstChunk := firstPacket.Chunk()
moreChunks := firstPacket.MoreChunks()
if request.Option.IsChunkStream() {
vmessio.Authenticate(firstChunk)
}
bodyWriter := session.EncodeRequestBody(writer)
bodyWriter.Write(firstChunk.Value)
firstChunk.Release()
writer.SetCached(false)
if moreChunks {
var streamWriter v2io.Writer = v2io.NewAdaptiveWriter(bodyWriter)
if request.Option.IsChunkStream() {
streamWriter = vmessio.NewAuthChunkWriter(streamWriter)
}
v2io.Pipe(input, streamWriter)
streamWriter.Release()
}
return
}
func (this *VMessOutboundHandler) handleResponse(session *raw.ClientSession, conn net.Conn, request *proto.RequestHeader, dest v2net.Destination, output v2io.Writer, finish *sync.Mutex) {
defer finish.Unlock()
reader := v2io.NewBufferedReader(conn)
defer reader.Release()
header, err := session.DecodeResponseHeader(reader)
if err != nil {
log.Warning("VMessOut: Failed to read response: ", err)
return
}
go this.handleCommand(dest, header.Command)
reader.SetCached(false)
decryptReader := session.DecodeResponseBody(conn)
var bodyReader v2io.Reader
if request.Option.IsChunkStream() {
bodyReader = vmessio.NewAuthChunkReader(decryptReader)
} else {
bodyReader = v2io.NewAdaptiveReader(decryptReader)
}
v2io.Pipe(bodyReader, output)
bodyReader.Release()
return
}
func init() {
internal.MustRegisterOutboundHandlerCreator("vmess",
func(space app.Space, rawConfig interface{}) (proxy.OutboundHandler, error) {
vOutConfig := rawConfig.(*Config)
return &VMessOutboundHandler{
receiverManager: NewReceiverManager(vOutConfig.Receivers),
}, nil
})
}