func (o *Observe) Register(device client.Client) bool {
registered := false
conn := []string{device.Host, device.Port}
keyID := client.GenerateId(conn)
if _, ok := GetRegClientByKey(keyID); ok != nil {
return false
}
resources, err := Discover(device)
if err != nil {
log.Printf("Do not find device: %s\n", err)
return false
}
coreLinks := resources.(string)
if coreLinks == "" {
return false
}
if endPoints, ok := core.Parse(coreLinks); ok {
req := coap.Message{
Type: coap.NonConfirmable,
Code: coap.GET,
}
req.AddOption(coap.Observe, 0)
RegDev := &Registered{}
remoteAddr, _ := net.ResolveUDPAddr(Net, strings.Join(conn, ":"))
for _, res := range endPoints {
link := res.GetLink()
if len(link) > 1 {
req.Token = []byte(utils.GenToken(8))
req.MessageID = utils.GenMessageID()
req.SetPathString(link)
err := coap.Transmit(o.Conn, remoteAddr, req)
if err != nil {
log.Printf("Error sending request: %v", err)
}
RegDev.Req = append(RegDev.Req, req)
log.Printf("REGISTER Resource: %s, Host: %s, Port: %d\n", link, remoteAddr.IP, remoteAddr.Port)
ValidTokens[string(req.Token)] = true
}
}
if len(RegDev.Req) > 0 {
RegDev.Id = keyID
RegDev.RemoteAddr = remoteAddr
RegRes = append(RegRes, *RegDev)
registered = true
}
}
return registered
}
func RemoveUnObservable(m *coap.Message, from *net.UDPAddr) {
RemoveToken(m.Token)
conn := []string{fmt.Sprint(from.IP), fmt.Sprint(from.Port)}
keyID := client.GenerateId(conn)
id, client := GetRegClientByKey(keyID)
if id >= 0 {
for i, reg := range client.Req {
if string(reg.Token) == string(m.Token) {
client.Req = append(client.Req[:i], client.Req[i+1:]...)
}
}
}
}