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
|
package server
import (
"fmt"
"log"
"net"
"time"
"go.rctt.net/solec/core"
)
func (s *Server) SendBroadcast(msg string) {
payload := core.Message{
Source: "op@example.org",
Target: "*@example.org",
Timestamp: time.Now(),
Content: msg,
}
data, err := core.Encode(payload)
if err != nil {
panic(err)
}
for _, u := range s.users {
for c := range u.Conns {
if _, err := c.Write(data); err != nil {
log.Println("cannot send", err)
}
}
}
}
func (s *Server) handleMessage(sender net.Conn, connType core.ConnType, senderUser *User, msg core.Message) error {
if connType == core.ConnTypeUser {
msg.Timestamp = time.Now()
}
log.Println("message:", msg.Source, "->", msg.Target, msg.Content)
addr, err := core.ReadAddr(msg.Target)
if err != nil {
return err
}
if err := s.Storage.AddMessage(msg); err != nil {
log.Println("cannot write to database", err)
}
if addr.Host == s.cfg.Name {
return s.handleLocalMessage(sender, senderUser, addr, msg)
}
return s.handleOutboundMessage(addr, msg)
}
func (s *Server) handleLocalMessage(sender net.Conn, senderUser *User, addr core.Addr, msg core.Message) error {
perm, err := s.Storage.GetPermission(senderUser.Addr, addr.String())
if err != nil {
log.Println("cannot get channel permissions:", err)
return core.Send(sender, core.Error{core.ErrorNotFound})
}
if !perm.Write {
log.Println("user not authorized")
return core.Send(sender, core.Error{core.ErrorNotFound})
}
if addr.Type == core.AddrUser {
s.handleUserMessage(addr, sender, msg)
return nil
}
users, err := s.Storage.GetChannelUsers(addr.String())
if err != nil {
log.Println("cannot get channel users:", err)
return core.Send(sender, core.Error{core.ErrorUnknown})
}
for _, u := range users {
addr, err := core.ReadAddr(u)
if err != nil {
log.Println("cannot read user address:", err)
continue
}
if addr.Host != s.cfg.Name {
err := s.handleOutboundMessage(addr, msg)
if err != nil {
log.Println("cannot send group message to remote user:", err)
}
continue
}
err = s.handleUserMessage(addr, sender, msg)
if err != nil {
log.Println("cannot send group message to local user:", err)
}
}
return nil
}
func (s *Server) handleOutboundMessage(addr core.Addr, msg core.Message) error {
remote, err := s.getRemote(addr.Host)
if err != nil {
return fmt.Errorf("cannot access remote server: %w", err)
}
return core.Send(remote.Conn, msg)
}
func (s *Server) handleUserMessage(addr core.Addr, sender net.Conn, msg core.Message) error {
s.usersMu.RLock()
user, ok := s.users[addr.String()]
if !ok {
log.Println("user not found")
return core.Send(sender, core.Error{core.ErrorNotFound})
}
s.usersMu.RUnlock()
return user.Send(sender, msg)
}
|
