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 xmpp
import (
"crypto/tls"
"crypto/x509"
"encoding/xml"
"log"
)
type Event uint8
const (
DisconnectEvent Event = iota
ConnectEvent
ShouldDisconnectEvent
)
func Run(ch chan Event, jid string, pwd string) {
conn, err := setupConn(jid)
if err != nil {
log.Print(err)
return
}
defer conn.Close()
decoder := newDecoder(conn)
go decoder.run()
defer decoder.stop()
enc := newEncoder(conn)
defer enc.Close()
end := sendStreamStart(&enc, jid)
defer sendStreamEnd(&enc, end)
ch <- ConnectEvent
defer func() { ch <- DisconnectEvent }()
for {
select {
case ev := <-ch:
switch ev {
case ShouldDisconnectEvent:
return
default:
log.Printf("Unknown Event '%d'!\n", ev)
}
case token := <-decoder.data:
switch element := token.(type) {
case xml.EndElement:
if element.Name.Local == "error" {
log.Println("Received stream error!")
return
}
}
}
}
}
func setupConn(jid string) (*tls.Conn, error) {
domain := domainpart(jid)
roots, err := x509.SystemCertPool()
if err != nil {
return nil, err
}
return tls.Dial("tcp", domain+":"+"5223", &tls.Config{RootCAs: roots})
}
func sendStreamStart(enc *encoder, jid string) xml.EndElement {
start := xml.StartElement{
xml.Name{"jabber:client", "stream:stream"},
[]xml.Attr{
xml.Attr{xml.Name{"", "from"}, jid},
xml.Attr{xml.Name{"", "to"}, domainpart(jid)},
xml.Attr{xml.Name{"", "version"}, "1.0"},
xml.Attr{xml.Name{"", "xml:lang"}, "en"},
xml.Attr{xml.Name{"", "xmlns:stream"}, "http://etherx.jabber.org/streams"},
},
}
err := enc.encodeNow(start)
if err != nil {
log.Println("Could not encode stream start!")
}
return start.End()
}
func sendStreamEnd(enc *encoder, end xml.EndElement) {
err := enc.encodeNow(end)
if err != nil {
log.Println("Could not encode stream end!")
}
}
|
