DhcpOptions¶

//
// Represents options in a DHCP message. In the DHCP protocol, options are
// added to the message as tagged data items. In the simulation, this DhcpOptions
// class statically holds the union of all options actually used by the DHCP
// protocol models. Options absent from a packet are represented by empty/unfilled
// DhcpOptions fields.
//
// @see DhcpMessage, DhcpClient, DhcpServer
//
class DhcpOptions extends cObject
{
    @packetData;
    DhcpMessageType messageType; // to convey the type of the DHCP message
    string hostName; // name of the client
    DhcpOptionCode parameterRequestList[]; // used by a DHCP client to request values for specified configuration parameters
    MacAddress clientIdentifier; // used by DHCP clients to specify their unique identifier
    Ipv4Address requestedIp; // used in a client request (DHCPDISCOVER) to allow the client to request that a particular IP address be assigned
    Ipv4Address subnetMask; // client's subnet mask
    Ipv4Address router[]; // IP addresses for routers on the client's subnet
    Ipv4Address dns[]; // list of DNSs available to the client
    Ipv4Address ntp[]; // list of IP addresses indicating NTP servers available to the client
    Ipv4Address serverIdentifier; // client use this field as the destination address for any unicast DHCP messages to the server
    simtime_t renewalTime; // time interval (T1) from address assignment until the client transitions to the RENEWING state
    simtime_t rebindingTime; // time interval (T2) from address assignment until the client transitions to the REBINDING state
    simtime_t leaseTime; // request for lease time (client), offered lease time (server)
}