/
main.go
148 lines (119 loc) · 3.31 KB
/
main.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
package main
import (
"context"
"log"
"net/http"
"os"
"github.com/function61/gokit/app/dynversion"
"github.com/function61/gokit/log/logex"
"github.com/function61/gokit/net/http/httputils"
"github.com/function61/gokit/os/osutil"
"github.com/function61/gokit/sync/taskrunner"
"github.com/function61/holepunch-server/pkg/holepunchsshserver"
"github.com/function61/holepunch-server/pkg/reverseproxy"
"github.com/function61/holepunch-server/pkg/sshserverportforward"
"github.com/spf13/cobra"
"golang.org/x/crypto/ssh"
)
func main() {
app := &cobra.Command{
Use: os.Args[0],
Short: "holepunch-server",
Version: dynversion.Version,
}
app.AddCommand(serverEntry())
osutil.ExitIfError(app.Execute())
}
func serverEntry() *cobra.Command {
sshdOverWebsocket := false
sshdOverTcp := ""
reverseProxy := false
cmd := &cobra.Command{
Use: "server",
Short: "Start server",
Args: cobra.NoArgs,
Run: func(cmd *cobra.Command, args []string) {
rootLogger := logex.StandardLogger()
osutil.ExitIfError(server(
osutil.CancelOnInterruptOrTerminate(rootLogger),
sshdOverWebsocket,
sshdOverTcp,
reverseProxy,
rootLogger,
))
},
}
cmd.Flags().BoolVarP(&sshdOverWebsocket, "sshd-websocket", "", sshdOverWebsocket, "Serve holepunch-SSHD over WS")
cmd.Flags().StringVarP(&sshdOverTcp, "sshd-tcp", "", sshdOverTcp, "Serve holepunch-SSHD over TCP, specify e.g. 0.0.0.0:22")
cmd.Flags().BoolVarP(&reverseProxy, "http-reverse-proxy", "", reverseProxy, "Enable holepunch HTTP reverse proxy")
return cmd
}
func server(
ctx context.Context,
sshdOverWebsocket bool,
sshdOverTcp string,
reverseProxy bool,
logger *log.Logger,
) error {
sshserverportforward.SetLogger(logex.Prefix("sshd-portforward", logger))
logl := logex.Levels(logger)
defer logl.Info.Println("Stopped")
tasks := taskrunner.New(ctx, logger)
logl.Info.Printf("holepunch-server %s starting", dynversion.Version)
if sshdOverTcp != "" {
sshConf, err := sshConfig()
if err != nil {
return err
}
tasks.Start("tcp-sshd", func(ctx context.Context) error {
return serveSshdOnTCP(
ctx,
sshdOverTcp,
sshConf,
logex.Prefix("tcp-sshd", logger))
})
}
mux := http.NewServeMux()
if sshdOverWebsocket {
sshConf, err := sshConfig()
if err != nil {
return err
}
RegisterSshdOverWebsocket(
mux,
sshConf,
logex.Prefix("ws", logger))
}
if reverseProxy {
reverseproxy.Register(mux, logex.Prefix("reverseproxy", logger))
}
// only need HTTP if these services are enabled
if sshdOverWebsocket || reverseProxy {
tasks.Start("httpserver", func(ctx context.Context) error {
return serveHttp(ctx, mux, logex.Prefix("httpserver", logger))
})
}
return tasks.Wait()
}
func sshConfig() (*ssh.ServerConfig, error) {
hostPrivateKey, err := osutil.GetenvRequiredFromBase64("SSH_HOSTKEY")
if err != nil {
return nil, err
}
clientPubKey, err := osutil.GetenvRequired("CLIENT_PUBKEY")
if err != nil {
return nil, err
}
conf, err := holepunchsshserver.DefaultConfig(hostPrivateKey, clientPubKey)
if err != nil {
return nil, err
}
return conf, nil
}
func serveHttp(ctx context.Context, handler http.Handler, logger *log.Logger) error {
srv := &http.Server{
Addr: ":80",
Handler: handler,
}
return httputils.CancelableServer(ctx, srv, func() error { return srv.ListenAndServe() })
}