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|
package main
import (
"crypto/tls"
"crypto/x509"
"encoding/xml"
"log"
"strings"
)
const (
StreamCloser = `</stream:stream>`
)
type XmppEvent uint8
const (
XmppDisconnect XmppEvent = iota
XmppConnect
)
func (l *Limox) xmpp(jid string, pwd string) {
log.Printf("JID: '%s' PWD: '%s'\n", jid, pwd)
domain := domainpart(jid)
log.Printf("Domain: '%s'\n", domain)
roots, err := x509.SystemCertPool()
if err != nil {
l.XmppEvents <- err
return
}
conn, err := tls.Dial("tcp", domain+":"+"5223", &tls.Config{RootCAs: roots})
if err != nil {
l.XmppEvents <- err
return
}
l.XmppEvents <- XmppConnect
sendStreamStart(conn, jid)
var closing bool = false
for {
ev := <-l.GuiEvents
switch ev {
case Disconnect:
closing = true
default:
log.Fatalf("Unknown GuiEvent '%d'!\n", ev)
}
if closing {
break
}
}
log.Print("C: " + StreamCloser)
conn.Write([]byte(StreamCloser))
conn.Close()
l.XmppEvents <- XmppDisconnect
}
type StreamInit struct {
XMLName xml.Name `xml:"stream:stream"`
From string `xml:"from,attr"`
To string `xml:"to,attr"`
Version string `xml:"version,attr"`
XmlLang string `xml:"xml:lang,attr"`
Xmlns string `xml:"xmlns,attr"`
XmlnsStream string `xml:"xmlns:stream,attr"`
}
func sendStreamStart(t *tls.Conn, jid string) {
data := StreamInit{
From: jid,
To: domainpart(jid),
Version: "1.0",
XmlLang: "en",
Xmlns: "jabber:client",
XmlnsStream: "http://etherx.jabber.org/streams",
}
serialized, err := xml.Marshal(data)
if err != nil {
log.Fatal(err)
}
str := strings.TrimSuffix(string(serialized), StreamCloser)
log.Print("C: " + str)
t.Write([]byte(serialized))
}
// domainpart extracts the domain name from a JID / XMPP address. See
// https://datatracker.ietf.org/doc/html/rfc7622#section-3.2 for details.
func domainpart(jid string) string {
list := []rune(jid)
for i, v := range list {
if v == '/' {
list = list[:i]
break
}
}
for i, v := range list {
if v == '@' {
list = list[i+1:]
break
}
}
return string(list)
}
|
