~emersion/soju

ref: 0f6bac30b894b4a562f72ccffdaa0411b6ac74f3 soju/cmd/soju/main.go -rw-r--r-- 6.0 KiB
0f6bac30Hubert Hirtz Drop TAGMSG in detached channels a month ago
                                                                                
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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
package main

import (
	"context"
	"crypto/tls"
	"flag"
	"fmt"
	"log"
	"net"
	"net/http"
	"net/url"
	"os"
	"os/signal"
	"strings"
	"sync/atomic"
	"syscall"
	"time"

	"github.com/pires/go-proxyproto"

	"git.sr.ht/~emersion/soju"
	"git.sr.ht/~emersion/soju/config"
)

// TCP keep-alive interval for downstream TCP connections
const downstreamKeepAlive = 1 * time.Hour

type stringSliceFlag []string

func (v *stringSliceFlag) String() string {
	return fmt.Sprint([]string(*v))
}

func (v *stringSliceFlag) Set(s string) error {
	*v = append(*v, s)
	return nil
}

func main() {
	var listen []string
	var configPath string
	var debug bool
	flag.Var((*stringSliceFlag)(&listen), "listen", "listening address")
	flag.StringVar(&configPath, "config", "", "path to configuration file")
	flag.BoolVar(&debug, "debug", false, "enable debug logging")
	flag.Parse()

	var cfg *config.Server
	if configPath != "" {
		var err error
		cfg, err = config.Load(configPath)
		if err != nil {
			log.Fatalf("failed to load config file: %v", err)
		}
	} else {
		cfg = config.Defaults()
	}

	cfg.Listen = append(cfg.Listen, listen...)
	if len(cfg.Listen) == 0 {
		cfg.Listen = []string{":6697"}
	}

	db, err := soju.OpenSQLDB(cfg.SQLDriver, cfg.SQLSource)
	if err != nil {
		log.Fatalf("failed to open database: %v", err)
	}

	var tlsCfg *tls.Config
	var tlsCert atomic.Value
	if cfg.TLS != nil {
		cert, err := tls.LoadX509KeyPair(cfg.TLS.CertPath, cfg.TLS.KeyPath)
		if err != nil {
			log.Fatalf("failed to load TLS certificate and key: %v", err)
		}
		tlsCert.Store(&cert)

		tlsCfg = &tls.Config{
			GetCertificate: func(*tls.ClientHelloInfo) (*tls.Certificate, error) {
				return tlsCert.Load().(*tls.Certificate), nil
			},
		}
	}

	srv := soju.NewServer(db)
	// TODO: load from config/DB
	srv.Hostname = cfg.Hostname
	srv.LogPath = cfg.LogPath
	srv.HTTPOrigins = cfg.HTTPOrigins
	srv.AcceptProxyIPs = cfg.AcceptProxyIPs
	srv.Debug = debug

	for _, listen := range cfg.Listen {
		listenURI := listen
		if !strings.Contains(listenURI, ":/") {
			// This is a raw domain name, make it an URL with an empty scheme
			listenURI = "//" + listenURI
		}
		u, err := url.Parse(listenURI)
		if err != nil {
			log.Fatalf("failed to parse listen URI %q: %v", listen, err)
		}

		switch u.Scheme {
		case "ircs", "":
			if tlsCfg == nil {
				log.Fatalf("failed to listen on %q: missing TLS configuration", listen)
			}
			host := u.Host
			if _, _, err := net.SplitHostPort(host); err != nil {
				host = host + ":6697"
			}
			ircsTLSCfg := tlsCfg.Clone()
			ircsTLSCfg.NextProtos = []string{"irc"}
			lc := net.ListenConfig{
				KeepAlive: downstreamKeepAlive,
			}
			l, err := lc.Listen(context.Background(), "tcp", host)
			if err != nil {
				log.Fatalf("failed to start TLS listener on %q: %v", listen, err)
			}
			ln := tls.NewListener(l, ircsTLSCfg)
			ln = proxyProtoListener(ln, srv)
			go func() {
				if err := srv.Serve(ln); err != nil {
					log.Printf("serving %q: %v", listen, err)
				}
			}()
		case "irc+insecure":
			host := u.Host
			if _, _, err := net.SplitHostPort(host); err != nil {
				host = host + ":6667"
			}
			lc := net.ListenConfig{
				KeepAlive: downstreamKeepAlive,
			}
			ln, err := lc.Listen(context.Background(), "tcp", host)
			if err != nil {
				log.Fatalf("failed to start listener on %q: %v", listen, err)
			}
			ln = proxyProtoListener(ln, srv)
			go func() {
				if err := srv.Serve(ln); err != nil {
					log.Printf("serving %q: %v", listen, err)
				}
			}()
		case "unix":
			ln, err := net.Listen("unix", u.Path)
			if err != nil {
				log.Fatalf("failed to start listener on %q: %v", listen, err)
			}
			ln = proxyProtoListener(ln, srv)
			go func() {
				if err := srv.Serve(ln); err != nil {
					log.Printf("serving %q: %v", listen, err)
				}
			}()
		case "wss":
			addr := u.Host
			if _, _, err := net.SplitHostPort(addr); err != nil {
				addr = addr + ":https"
			}
			httpSrv := http.Server{
				Addr:      addr,
				TLSConfig: tlsCfg,
				Handler:   srv,
			}
			go func() {
				if err := httpSrv.ListenAndServeTLS("", ""); err != nil {
					log.Fatalf("serving %q: %v", listen, err)
				}
			}()
		case "ws+insecure":
			addr := u.Host
			if _, _, err := net.SplitHostPort(addr); err != nil {
				addr = addr + ":http"
			}
			httpSrv := http.Server{
				Addr:    addr,
				Handler: srv,
			}
			go func() {
				if err := httpSrv.ListenAndServe(); err != nil {
					log.Fatalf("serving %q: %v", listen, err)
				}
			}()
		case "ident":
			if srv.Identd == nil {
				srv.Identd = soju.NewIdentd()
			}

			host := u.Host
			if _, _, err := net.SplitHostPort(host); err != nil {
				host = host + ":113"
			}
			ln, err := net.Listen("tcp", host)
			if err != nil {
				log.Fatalf("failed to start listener on %q: %v", listen, err)
			}
			ln = proxyProtoListener(ln, srv)
			go func() {
				if err := srv.Identd.Serve(ln); err != nil {
					log.Printf("serving %q: %v", listen, err)
				}
			}()
		default:
			log.Fatalf("failed to listen on %q: unsupported scheme", listen)
		}

		log.Printf("server listening on %q", listen)
	}

	sigCh := make(chan os.Signal, 1)
	signal.Notify(sigCh, syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP)

	if err := srv.Start(); err != nil {
		log.Fatal(err)
	}

	for sig := range sigCh {
		switch sig {
		case syscall.SIGHUP:
			if cfg.TLS != nil {
				log.Print("reloading TLS certificate")
				cert, err := tls.LoadX509KeyPair(cfg.TLS.CertPath, cfg.TLS.KeyPath)
				if err != nil {
					log.Printf("failed to reload TLS certificate and key: %v", err)
					break
				}
				tlsCert.Store(&cert)
			}
		case syscall.SIGINT, syscall.SIGTERM:
			log.Print("shutting down server")
			srv.Shutdown()
			return
		}
	}
}

func proxyProtoListener(ln net.Listener, srv *soju.Server) net.Listener {
	return &proxyproto.Listener{
		Listener: ln,
		Policy: func(upstream net.Addr) (proxyproto.Policy, error) {
			tcpAddr, ok := upstream.(*net.TCPAddr)
			if !ok {
				return proxyproto.IGNORE, nil
			}
			if srv.AcceptProxyIPs.Contains(tcpAddr.IP) {
				return proxyproto.USE, nil
			}
			return proxyproto.IGNORE, nil
		},
	}
}