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
|
package server
import (
"log"
"net"
"go.rctt.net/solec/core"
)
type User struct {
Name string
Conns map[net.Conn]struct{}
}
func NewUser(conn net.Conn, name string) User {
u := User{
Name: name,
Conns: make(map[net.Conn]struct{}),
}
u.Conns[conn] = struct{}{}
return u
}
func (u *User) Send(payload core.Wrapper) error {
for c := range u.Conns {
if err := core.Send(c, payload); err != nil {
return err
}
}
return nil
}
func (s *Server) handleUserConn(conn net.Conn) {
name, err := s.performUserAuth(conn)
if err != nil {
log.Println("user auth error:", err)
return
}
s.usersMu.Lock()
user, ok := s.users[name]
if ok {
log.Println("next connection from user:", user.Name)
user.Conns[conn] = struct{}{}
} else {
log.Println("initial connection from user:", name)
user = NewUser(conn, name)
s.users[name] = user
}
s.usersMu.Unlock()
defer func() {
s.usersMu.Lock()
log.Println("client disconnected: ", user.Name)
delete(s.users[user.Name].Conns, conn)
if len(s.users[user.Name].Conns) == 0 {
log.Println("all connections closed for user:", user.Name)
delete(s.users, user.Name)
}
s.usersMu.Unlock()
}()
if err := s.readInput(conn); err != nil {
log.Println(err)
}
}
func (s *Server) performUserAuth(conn net.Conn) (string, error) {
clientPayload, err := core.Decode(conn)
if err != nil {
return "", err
}
clientAuth, ok := clientPayload.(core.UserAuth)
if !ok {
return "", core.ErrUnexpectedPayloadType
}
// For testing ---
if clientAuth.Pass != "valid" {
if err := core.Send(conn, core.Error{core.ErrorAuthFailed}); err != nil {
log.Println("cannot send auth error:", err)
}
return "", core.ErrAuthInvalidPassword
}
// ---
if err := core.Send(conn, core.Success{}); err != nil {
return "", err
}
return clientAuth.Name, nil
}
|
