/
rpcserver.go
257 lines (215 loc) · 5.17 KB
/
rpcserver.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
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
255
256
257
package rpcserver
import (
"context"
"fmt"
"net"
"os"
"runtime"
"sync"
"time"
"github.com/instance-id/GoVerifier-dgo/verifier"
"github.com/smallnest/rpcx/server"
"go.uber.org/zap"
)
var (
serv *RpcServer
log *zap.SugaredLogger
wg sync.WaitGroup
ad *AccessData
runner chan bool
timeOut chan bool
ip = "localhost"
port = "14555"
address = fmt.Sprintf("%s:%s", ip, port)
clientConn net.Conn
)
type Server struct{}
type AccessData struct {
key []byte
}
type ServerData struct {
ProcessName string
ProcessID int
Log *zap.SugaredLogger
Address string
Port *string
Verifier *verifier.Config
Key string
Phrase string
encrypted []byte
RpcRunning bool
VerifierRunning bool
svr *server.Server
}
type RpcServer struct {
Data *ServerData
}
type Reply struct {
Message string
RunCheck bool
RPCCheck bool
ProcessID int
Key []byte
}
type Args struct {
Key []byte
Name string
Message string
Ctx map[string]interface{}
}
func Status(reply *Reply) *Reply {
log.Infof("Checking RPC_STATUS")
if serv.Data.VerifierRunning {
log.Infof("Verifier UI checking status")
reply.Message = fmt.Sprintf("Verifier running")
reply.RunCheck = serv.Data.VerifierRunning
reply.RPCCheck = serv.Data.RpcRunning
reply.ProcessID = os.Getpid()
return reply
} else {
log.Infof("Verifier not running")
reply.Message = "Verifier not running"
reply.RunCheck = false
reply.RPCCheck = true
return reply
}
}
func StartServer(args Args, res *Reply) *Reply {
res.Message = fmt.Sprintf("Starting Verfier server")
go Run()
log.Infof("Starting Verifier server")
return res
}
func RestartServer(args Args, res *Reply) *Reply {
log.Infof("Stopping Verifier server")
serv.Data.Verifier.Close()
serv.Data.VerifierRunning = false
log.Infof("Restarting Verifier server")
defer serv.Data.Verifier.Close()
err := serv.Data.Verifier.Start()
ErrCheck("Couldn't start verifierRun: ", err)
serv.Data.VerifierRunning = true
log.Infof("Restart complete")
res.Message = fmt.Sprintf("Restart complete")
return res
}
func StopServer(args Args, res *Reply) *Reply {
res.Message = fmt.Sprintf("Shut down of Verifier initiated")
res.RunCheck = false
res.RPCCheck = false
go delayedOsExit()
return res
}
func RunServer(r *RpcServer, Logs *zap.SugaredLogger) {
serv = r
log = Logs
serv.Data.VerifierRunning = false
wg.Add(1)
go rpcServer()
runtime.Gosched()
log.Infof("RPC Server started. Waiting for Verifier start signal.")
log.Infof("Initiated 30 second application timeout if not received.")
serv.Data.RpcRunning = true
receiveOrTimeout()
wg.Wait()
log.Infof("Shutdown Initiated")
serv.Data.VerifierRunning = false
serv.Data.RpcRunning = false
}
func rpcServer() {
log.Infof("Starting Server on port: %s", RPC_PORT)
s := server.NewServer()
//s.Register(new(Arith), "")
s.RegisterName("Server", new(Server), "")
err := s.Serve("tcp", address)
if err != nil {
panic(err)
}
}
func Run() {
defer serv.Data.Verifier.Close()
err := serv.Data.Verifier.Start()
ErrCheck("Couldn't start verifierRun: ", err)
serv.Data.VerifierRunning = true
runner = make(chan bool)
timeOut <- true
<-runner
wg.Done()
log.Infof("Issued close")
}
func ErrCheck(msg string, err error) {
if err != nil {
log.Fatalf("%s %s\n", msg, err)
}
}
func GetKey(s *ServerData) *ServerData {
encrypted := encrypt([]byte(s.Key), s.Phrase)
s.encrypted = encrypted
return s
}
func DecryptKey(requestKey []byte) bool {
unencrypted := decrypt(requestKey, serv.Data.Phrase)
if string(unencrypted) == serv.Data.Key {
return true
}
return false
}
func delayedOsExit() {
time.Sleep(5000 * time.Millisecond)
log.Infof("Stopping Verifier server")
runner <- true
}
func (s *Server) RpcRequestHandler(ctx context.Context, args Args, reply *Reply) error {
fmt.Printf("%x : %s : %s: %s \n", args.Key, args.Name, args.Message, reply.Message)
clientConn = ctx.Value(server.RemoteConnContextKey).(net.Conn)
log.Infof(" Client IP: %s ", clientConn.RemoteAddr().String())
if !DecryptKey(args.Key) {
log.Infof("Failed Authentication attempt from: %s ", clientConn.RemoteAddr().String())
reply.Message = fmt.Sprintf("Could not Authenticate from: %s", clientConn.RemoteAddr().String())
return nil
}
serv.Data.Log.Infof("Authentication successful")
switch args.Name {
case RPC_START:
{
reply = StartServer(args, reply)
reply.ProcessID = os.Getpid()
return nil
}
case RPC_RESTART:
{
reply = RestartServer(args, reply)
return nil
}
case RPC_STOP:
{
reply = StopServer(args, reply)
return nil
}
case RPC_STATUS:
{
log.Infof("Received RPC_STATUS cmd")
reply = Status(reply)
log.Infof("Finished Status. \n")
return nil
}
default:
{
log.Infof("None matched up. : / \n")
return nil
}
}
}
func receiveOrTimeout() {
timeOut = make(chan bool, 1)
defer close(timeOut)
timer := time.NewTimer(30 * time.Second)
defer timer.Stop()
select {
case <-timeOut:
log.Infof("Start signal received. Timeout canceled.")
case <-timer.C:
log.Warnf("Start signal not received before timeout. Closing.")
wg.Done()
}
}