/
listener.go
140 lines (123 loc) · 2.87 KB
/
listener.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
package http2
import (
"crypto/tls"
"net"
"net/http"
"time"
"github.com/go-gost/core/listener"
"github.com/go-gost/core/logger"
md "github.com/go-gost/core/metadata"
admission "github.com/go-gost/x/admission/wrapper"
climiter "github.com/go-gost/x/limiter/conn/wrapper"
limiter "github.com/go-gost/x/limiter/traffic/wrapper"
mdx "github.com/go-gost/x/metadata"
metrics "github.com/go-gost/x/metrics/wrapper"
"github.com/go-gost/x/registry"
xnet "github.com/gost-dev/x/extra/net"
"github.com/gost-dev/x/extra/net/proxyproto"
"golang.org/x/net/http2"
)
func init() {
registry.ListenerRegistry().Register("http2", NewListener)
}
type http2Listener struct {
server *http.Server
addr net.Addr
cqueue chan net.Conn
errChan chan error
logger logger.Logger
md metadata
options listener.Options
}
func NewListener(opts ...listener.Option) listener.Listener {
options := listener.Options{}
for _, opt := range opts {
opt(&options)
}
return &http2Listener{
logger: options.Logger,
options: options,
}
}
func (l *http2Listener) Init(md md.Metadata) (err error) {
if err = l.parseMetadata(md); err != nil {
return
}
l.server = &http.Server{
Addr: l.options.Addr,
Handler: http.HandlerFunc(l.handleFunc),
TLSConfig: l.options.TLSConfig,
}
if err := http2.ConfigureServer(l.server, nil); err != nil {
return err
}
network := "tcp"
if xnet.IsIPv4(l.options.Addr) {
network = "tcp4"
}
ln, err := net.Listen(network, l.options.Addr)
if err != nil {
return err
}
l.addr = ln.Addr()
ln = proxyproto.WrapListener(l.options.ProxyProtocol, ln, 10*time.Second)
ln = metrics.WrapListener(l.options.Service, ln)
ln = admission.WrapListener(l.options.Admission, ln)
ln = limiter.WrapListener(l.options.TrafficLimiter, ln)
ln = climiter.WrapListener(l.options.ConnLimiter, ln)
ln = tls.NewListener(
ln,
l.options.TLSConfig,
)
l.cqueue = make(chan net.Conn, l.md.backlog)
l.errChan = make(chan error, 1)
go func() {
if err := l.server.Serve(ln); err != nil {
l.logger.Error(err)
}
}()
return
}
func (l *http2Listener) Accept() (conn net.Conn, err error) {
var ok bool
select {
case conn = <-l.cqueue:
case err, ok = <-l.errChan:
if !ok {
err = listener.ErrClosed
}
}
return
}
func (l *http2Listener) Addr() net.Addr {
return l.addr
}
func (l *http2Listener) Close() (err error) {
select {
case <-l.errChan:
default:
err = l.server.Close()
l.errChan <- err
close(l.errChan)
}
return nil
}
func (l *http2Listener) handleFunc(w http.ResponseWriter, r *http.Request) {
raddr, _ := net.ResolveTCPAddr("tcp", r.RemoteAddr)
conn := &conn{
laddr: l.addr,
raddr: raddr,
closed: make(chan struct{}),
md: mdx.NewMetadata(map[string]any{
"r": r,
"w": w,
}),
}
select {
case l.cqueue <- conn:
default:
l.logger.Warnf("connection queue is full, client %s discarded", r.RemoteAddr)
return
}
<-conn.Done()
}