Ejemplo n.º 1
0
// successCEA sends a success answer indicating that the CER was successfuly
// parsed and accepted by the server.
func successCEA(sm *StateMachine, c diam.Conn, m *diam.Message, cer *smparser.CER) error {
	hostIP, _, err := net.SplitHostPort(c.LocalAddr().String())
	if err != nil {
		return fmt.Errorf("failed to parse own ip %q: %s", c.LocalAddr(), err)
	}
	a := m.Answer(diam.Success)
	a.NewAVP(avp.OriginHost, avp.Mbit, 0, sm.cfg.OriginHost)
	a.NewAVP(avp.OriginRealm, avp.Mbit, 0, sm.cfg.OriginRealm)
	a.NewAVP(avp.HostIPAddress, avp.Mbit, 0, datatype.Address(net.ParseIP(hostIP)))
	a.NewAVP(avp.VendorID, avp.Mbit, 0, sm.cfg.VendorID)
	a.NewAVP(avp.ProductName, 0, 0, sm.cfg.ProductName)
	if cer.OriginStateID != nil {
		a.AddAVP(cer.OriginStateID)
	}
	if cer.AcctApplicationID != nil {
		for _, acct := range cer.AcctApplicationID {
			a.AddAVP(acct)
		}
	}
	if cer.AuthApplicationID != nil {
		for _, auth := range cer.AuthApplicationID {
			a.AddAVP(auth)
		}
	}
	if cer.VendorSpecificApplicationID != nil {
		for _, vs := range cer.VendorSpecificApplicationID {
			a.AddAVP(vs)
		}
	}
	if sm.cfg.FirmwareRevision != 0 {
		a.NewAVP(avp.FirmwareRevision, avp.Mbit, 0, sm.cfg.FirmwareRevision)
	}
	_, err = a.WriteTo(c)
	return err
}
Ejemplo n.º 2
0
// errorCEA sends an error answer indicating that the CER failed due to
// an unsupported (acct/auth) application, and includes the AVP that
// caused the failure in the message.
func errorCEA(sm *StateMachine, c diam.Conn, m *diam.Message, cer *smparser.CER, failedAVP *diam.AVP) error {
	hostIP, _, err := net.SplitHostPort(c.LocalAddr().String())
	if err != nil {
		return fmt.Errorf("failed to parse own ip %q: %s", c.LocalAddr(), err)
	}
	var a *diam.Message
	if failedAVP == cer.InbandSecurityID {
		a = m.Answer(diam.NoCommonSecurity)
	} else {
		a = m.Answer(diam.NoCommonApplication)
	}
	a.Header.CommandFlags |= diam.ErrorFlag
	a.NewAVP(avp.OriginHost, avp.Mbit, 0, sm.cfg.OriginHost)
	a.NewAVP(avp.OriginRealm, avp.Mbit, 0, sm.cfg.OriginRealm)
	a.NewAVP(avp.HostIPAddress, avp.Mbit, 0, datatype.Address(net.ParseIP(hostIP)))
	a.NewAVP(avp.VendorID, avp.Mbit, 0, sm.cfg.VendorID)
	a.NewAVP(avp.ProductName, 0, 0, sm.cfg.ProductName)
	if cer.OriginStateID != nil {
		a.AddAVP(cer.OriginStateID)
	}
	a.NewAVP(avp.FailedAVP, avp.Mbit, 0, &diam.GroupedAVP{
		AVP: []*diam.AVP{failedAVP},
	})
	if sm.cfg.FirmwareRevision != 0 {
		a.NewAVP(avp.FirmwareRevision, avp.Mbit, 0, sm.cfg.FirmwareRevision)
	}
	_, err = a.WriteTo(c)
	return err
}
Ejemplo n.º 3
0
func (cli *Client) handshake(c diam.Conn) (diam.Conn, error) {
	ip, _, err := net.SplitHostPort(c.LocalAddr().String())
	if err != nil {
		return nil, err
	}
	m := cli.makeCER(net.ParseIP(ip))
	// Ignore CER, but not DWR.
	cli.Handler.mux.HandleFunc("CER", func(c diam.Conn, m *diam.Message) {})
	// Handle CEA and DWA.
	errc := make(chan error)
	dwac := make(chan struct{})
	cli.Handler.mux.Handle("CEA", handleCEA(cli.Handler, errc))
	cli.Handler.mux.Handle("DWA", handshakeOK(handleDWA(cli.Handler, dwac)))
	for i := 0; i < (int(cli.MaxRetransmits) + 1); i++ {
		_, err := m.WriteTo(c)
		if err != nil {
			return nil, err
		}
		select {
		case err := <-errc: // Wait for CEA.
			if err != nil {
				close(errc)
				return nil, err
			}
			if cli.EnableWatchdog {
				go cli.watchdog(c, dwac)
			}
			return c, nil
		case <-time.After(cli.RetransmitInterval):
		}
	}
	c.Close()
	return nil, ErrHandshakeTimeout
}