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|
package xmpp
import (
"crypto/tls"
"crypto/x509"
"encoding/xml"
"log"
)
type Event uint8
const (
DisconnectEvent Event = iota
ConnectEvent
ShouldDisconnectEvent
)
type Conn struct {
ch chan Event
jid, pwd string
tcp *tls.Conn
}
func NewConn(ch chan Event, jid string, pwd string) *Conn {
c := Conn{
ch: ch,
jid: jid,
pwd: pwd}
return &c
}
func (c *Conn) Connect() error {
var err error
domain := domainpart(c.jid)
roots, err := x509.SystemCertPool()
if err != nil {
log.Println(err)
return err
}
c.tcp, err = tls.Dial("tcp", domain+":"+"5223", &tls.Config{RootCAs: roots})
if err != nil {
log.Println(err)
return err
}
return nil
}
func (c *Conn) Disconnect() {
c.tcp.Close()
}
func (c *Conn) Run() {
err := c.Connect()
if err != nil {
return
}
defer c.Disconnect()
decoder := newDecoder(c.tcp)
go decoder.run()
defer decoder.stop()
enc := newEncoder(c.tcp)
defer enc.Close()
tr := newTokenRouter(&enc)
end := sendStreamStart(&enc, c.jid)
defer sendStreamEnd(&enc, end)
c.ch <- ConnectEvent
defer func() { c.ch <- DisconnectEvent }()
for {
select {
case ev := <-c.ch:
switch ev {
case ShouldDisconnectEvent:
return
default:
log.Printf("Unknown Event '%d'!\n", ev)
}
case token := <-decoder.data:
err = tr.route(token)
if err != nil {
log.Println(err)
return
}
}
}
}
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!")
}
}
|
