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Description
Ultibo ARP (Address Resolution Protocol) unit
To be documented
Constants
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ARP specific constants ARP_TRANSPORT_*, RARP_TRANSPORT_*
ARP_TRANSPORT_NAME = 'ARP';
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RARP_TRANSPORT_NAME = 'RARP';
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[Expand]
ARP and RARP constants MIN_*, MAX_*, ARP_*, RARP_*
MIN_ARP_PACKET = 46;
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Not Counting Adapter Header
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MAX_ARP_PACKET = 46;
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Not Counting Adapter Header
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ARP_TIMEOUT = 1000;
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We wait for 1 second approx for reply
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ARP_RETRIES = 4;
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We try the request 4 times
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RARP_TIMEOUT = 4000;
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We wait for 4 seconds for a RARP reply
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RARP_RETRIES = 4;
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We try the request 4 times
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ARP_HEADER_SIZE = 46;
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SizeOf(TARPHeader);
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RARP_HEADER_SIZE = 46;
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SizeOf(TRARPHeader);
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[Expand]
ARP and RARP messages ARP_*, RARP_*, INARP_*
ARP_REQUEST = $0001;
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ARP/RARP op codes, Request
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ARP_REPLY = $0002;
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ARP/RARP op codes, Reply
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RARP_REQUEST = $0003;
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RARP_REPLY = $0004;
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INARP_REQUEST = $0008;
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Inverse ARP see RFC 1293
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INARP_REPLY = $0009;
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Type definitions
ARP specific types
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PARPHeader = ^TARPHeader;
TARPHeader = packed record
| Note: 46 Bytes
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HardwareType:Word;
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Hardware address space (Network Order)
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ProtocolType:Word;
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Protocol address space (Network Order)
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HardwareLength:Byte;
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Byte length of hardware address
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ProtocolLength:Byte;
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Byte length of each protocol address
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Opcode:Word;
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Op code (eg ARP_REQUEST or ARP_REPLY) (Network Order)
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SourceHardware:THardwareAddress;
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Source hardware address (of sender)
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SourceIP:TInAddr;
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Source protocol address (of sender) (Network Order)
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TargetHardware:THardwareAddress;
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Target hardware address (if known)
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TargetIP:TInAddr;
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Target protocol address (Network Order)
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Reserved:array[0..17] of Word;
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RARP specific types
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PRARPHeader = ^TRARPHeader;
TRARPHeader = TARPHeader;
Class definitions
To be documented
Public variables
None defined
Function declarations
Initialization functions
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procedure ARPInit;
Description: To be documented
ARP functions
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function CheckARP(ABuffer:Pointer):Boolean;
Description: Verify that the packet is a valid ARP packet
| Buffer
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Buffer points to the complete packet without Adapter header
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[Expand]
function CheckRARP(ABuffer:Pointer):Boolean;
Description: Verify that the packet is a valid RARP packet
| Buffer
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Buffer points to the complete packet without Adapter header
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