-
Notifications
You must be signed in to change notification settings - Fork 0
/
s2.go
149 lines (125 loc) · 3.18 KB
/
s2.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
package main
import (
"bufio"
"context"
"encoding/binary"
"fmt"
"log"
"net"
"net/http"
"os"
"time"
"github.com/quic-go/quic-go/http3"
"github.com/quic-go/webtransport-go"
)
const (
HOST = "localhost"
WEBTRANSPORTPORT = "5059"
AUDIOUDPPORT = "5014"
VIDEOUDPPORT = "5016"
MAXPAYLOAD = 1500
)
func main() {
// Step 01: Create UPD dial
udpAudio, err := net.ResolveUDPAddr("udp", HOST+":"+AUDIOUDPPORT)
if err != nil {
println("Resolve UDPAddr failed:", err.Error())
os.Exit(1)
}
audioUDPConn, err := net.DialUDP("udp", nil, udpAudio)
if err != nil {
println("dial audio udp failed:", err.Error())
os.Exit(1)
}
defer audioUDPConn.Close()
udpVideo, err := net.ResolveUDPAddr("udp", HOST+":"+VIDEOUDPPORT)
if err != nil {
println("Resolve UDPAddr failed:", err.Error())
os.Exit(1)
}
videoUDPConn, err := net.DialUDP("udp", nil, udpVideo)
if err != nil {
println("dial video udp failed:", err.Error())
os.Exit(1)
}
defer videoUDPConn.Close()
// Step 02: Setup WebTransport Server and Accept stream and forward to UDP
tlsConf, err := GetTLSConf(time.Now(), time.Now().Add(10*24*time.Hour))
if err != nil {
log.Fatal(err)
}
wmux := http.NewServeMux()
s := webtransport.Server{
H3: http3.Server{
TLSConfig: tlsConf,
Addr: ":" + WEBTRANSPORTPORT,
Handler: wmux,
},
CheckOrigin: func(r *http.Request) bool { return true },
}
defer s.Close()
wmux.HandleFunc("/streaming", func(w http.ResponseWriter, r *http.Request) {
conn, err := s.Upgrade(w, r)
if err != nil {
log.Printf("upgrading failed: %s", err)
w.WriteHeader(500)
return
}
var audioStream, videoStream webtransport.Stream
for {
stream, err := conn.AcceptStream(context.Background())
if err != nil {
fmt.Println("failed to accept directional stream:", err.Error())
}
defer stream.Close()
fmt.Printf("accept new stream, remote: %s, streamID: %x\n", conn.RemoteAddr().String(), stream.StreamID())
if audioStream == nil {
audioStream = stream
go forwardStreamtoUDP(audioStream, audioUDPConn)
} else if videoStream == nil {
videoStream = stream
go forwardStreamtoUDP(videoStream, videoUDPConn)
} else {
continue
}
}
})
fmt.Printf("listening on %s\n", s.H3.Addr)
if err := s.ListenAndServe(); err != nil {
log.Fatal(err)
}
}
func forwardStreamtoUDP(stream webtransport.Stream, udpconn *net.UDPConn) {
reader := bufio.NewReader(stream)
for {
buf := make([]byte, MAXPAYLOAD)
header := make([]byte, 2)
var bytesRead, n int
var err error
for bytesRead < 2 {
if n, err = reader.Read(header[bytesRead:2]); err != nil {
fmt.Printf("read stream header faild: %v\n", err)
return
}
bytesRead += n
}
length := int(binary.BigEndian.Uint16(header))
if length > cap(buf) {
fmt.Printf("buf cap limit: %v\n", err)
return
}
bytesRead = 0
for bytesRead < length {
if n, err = reader.Read(buf[bytesRead:length]); err != nil {
fmt.Printf("read stream body faild: %v\n", err)
return
}
bytesRead += n
}
_, err = udpconn.Write(buf[:length])
if err != nil {
fmt.Printf("write data failed: %v\n", err)
}
fmt.Printf("forward stream to udp: %04d\r", length)
}
}