Difference between revisions of "Unit ARP"

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''To be documented''
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<div style="font-size: 14px; padding-left: 12px;">'''ARP specific constants''' <code> ARP_TRANSPORT_*, RARP_TRANSPORT_* </code></div>
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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| <code>ARP_TRANSPORT_NAME = 'ARP';</code>
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| style="width: 50%;"|&nbsp;
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|-
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| <code>RARP_TRANSPORT_NAME = 'RARP';</code>
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| &nbsp;
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|-
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|}
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</div></div>
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<br /> 
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<div style="font-size: 14px; padding-left: 12px;">'''ARP and RARP constants''' <code> MIN_*, MAX_*, ARP_*, RARP_* </code></div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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| <code>MIN_ARP_PACKET = 46;</code>
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| Not Counting Adapter Header
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|-
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| <code>MAX_ARP_PACKET = 46;</code>
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| Not Counting Adapter Header
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|-
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|colspan="2"|&nbsp;
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|-
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| <code>ARP_TIMEOUT = 1000;</code>
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| We wait for 1 second approx for reply
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|-
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| <code>ARP_RETRIES = 4;</code>
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| We try the request 4 times
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|-
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|colspan="2"|&nbsp;
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|-
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| <code>RARP_TIMEOUT = 4000;</code>
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| We wait for 4 seconds for a RARP reply
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|-
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| <code>RARP_RETRIES = 4;</code>
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| We try the request 4 times
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|-
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|colspan="2"|&nbsp;
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|-
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| <code>ARP_HEADER_SIZE  = 46;</code>
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| SizeOf(TARPHeader);
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|-
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| <code>RARP_HEADER_SIZE = 46;</code>
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| SizeOf(TRARPHeader);
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|-
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|}
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</div></div>
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<br />
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<div style="font-size: 14px; padding-left: 12px;">'''ARP and RARP messages''' <code> ARP_*, RARP_*, INARP_* </code></div>
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<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
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{| class="wikitable" style="font-size: 14px; background: white;"
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|-
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| <code>ARP_REQUEST = $0001;</code>
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| ARP/RARP op codes, Request
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|-
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| <code>ARP_REPLY = $0002;</code>
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| ARP/RARP op codes, Reply
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|-
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| <code>RARP_REQUEST = $0003;</code>
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| &nbsp;
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|-
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| <code>RARP_REPLY = $0004;</code>
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| &nbsp;
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|-
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| <code>INARP_REQUEST = $0008;</code>
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| Inverse ARP see RFC 1293
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|-
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| <code>INARP_REPLY = $0009;</code>
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| &nbsp;
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|-
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|}
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</div></div>
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<br />
  
 
=== Type definitions ===
 
=== Type definitions ===

Revision as of 01:56, 24 November 2016

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Description

To be documented

Constants


ARP specific constants ARP_TRANSPORT_*, RARP_TRANSPORT_*
ARP_TRANSPORT_NAME = 'ARP';  
RARP_TRANSPORT_NAME = 'RARP';  


ARP and RARP constants MIN_*, MAX_*, ARP_*, RARP_*
MIN_ARP_PACKET = 46; Not Counting Adapter Header
MAX_ARP_PACKET = 46; Not Counting Adapter Header
 
ARP_TIMEOUT = 1000; We wait for 1 second approx for reply
ARP_RETRIES = 4; We try the request 4 times
 
RARP_TIMEOUT = 4000; We wait for 4 seconds for a RARP reply
RARP_RETRIES = 4; We try the request 4 times
 
ARP_HEADER_SIZE = 46; SizeOf(TARPHeader);
RARP_HEADER_SIZE = 46; SizeOf(TRARPHeader);


ARP and RARP messages ARP_*, RARP_*, INARP_*
ARP_REQUEST = $0001; ARP/RARP op codes, Request
ARP_REPLY = $0002; ARP/RARP op codes, Reply
RARP_REQUEST = $0003;  
RARP_REPLY = $0004;  
INARP_REQUEST = $0008; Inverse ARP see RFC 1293
INARP_REPLY = $0009;  


Type definitions

To be documented

Public variables

To be documented

Function declarations


Initialization functions 

procedure ARPInit;
Description: To be documented
Note None documented


ARP functions 

function CheckARP(ABuffer:Pointer):Boolean;
Description: Verify that the packet is a valid ARP packet
Buffer Buffer points to the complete packet without Adapter header 


function CheckRARP(ABuffer:Pointer):Boolean;
Description: Verify that the packet is a valid RARP packet
Buffer Buffer points to the complete packet without Adapter header


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