Golang Client.GetOffer Examples

Example #1

File: client.go Project: vmware/vic

func (c *client) request(cl *dhcp4client.Client) (bool, dhcp4.Packet, error) {
	defer trace.End(trace.Begin(""))

	dp, err := c.discoverPacket(cl)
	if err != nil {
		return false, nil, err
	}

	dp.PadToMinSize()
	if err = cl.SendPacket(dp); err != nil {
		return false, nil, err
	}

	var op dhcp4.Packet
	for {
		op, err = cl.GetOffer(&dp)
		if err != nil {
			return false, nil, err
		}

		if c.isCompletePacket(dhcp.NewPacket([]byte(op))) {
			break
		}
	}

	rp, err := c.requestPacket(cl, &op)
	if err != nil {
		return false, nil, err
	}

	rp.PadToMinSize()
	if err = cl.SendPacket(rp); err != nil {
		return false, nil, err
	}

	ack, err := cl.GetAcknowledgement(&rp)
	if err != nil {
		return false, nil, err
	}

	opts := ack.ParseOptions()
	if dhcp4.MessageType(opts[dhcp4.OptionDHCPMessageType][0]) == dhcp4.NAK {
		return false, nil, fmt.Errorf("Got NAK from DHCP server")
	}

	return true, ack, nil
}