ReadArpTable.c File Reference

#include "main.h"
#include "ARP.h"

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Macros
#define	_CRT_SECURE_NO_DEPRECATE

Functions
static PNETSIM_MACADDRESS	read_table (ARP_VARIABLES *arp, NETSIM_IPAddress ip)
int	fn_NetSim_Read_ARP_Table ()

Macro Definition Documentation

_CRT_SECURE_NO_DEPRECATE

#define _CRT_SECURE_NO_DEPRECATE

Definition at line 25 of file ReadArpTable.c.

Function Documentation

fn_NetSim_Read_ARP_Table()

int fn_NetSim_Read_ARP_Table

(

)

Definition at line 61 of file ReadArpTable.c.

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read_table()

static PNETSIM_MACADDRESS read_table ( ARP_VARIABLES *  arp, NETSIM_IPAddress  ip  )

static

Function: Read ARP Table
When packet want to transmit the MAC OUT EVENT, the job of Address Resolution Protocol
is to update the destination MAC address in the MAC data of the packet. To do that it 
follows the below steps.
1. Check the destination is in the same LAN. If yes, set the nDestinationId as well as
   DestinationIP from the packet you received. if not,then set the nDestinationId ZERO 
   for the DefaultGateway and the DestinationIP as the GatewayIP.
2. Then check the DestinationIP entry present in the ARP table. If present,
    set the nDestinationPresentFlag.
3  If nDestinationPresentFlag is set (ONE)then update the DestMAc of MACdata of packet
   and forward to MAC layer by keeping the packet in the AccessBuffer of AccessInterface.
4.  If nDestinationPresentFlag is not set and pnArpRequestFlag[nDestinationId](request flag 
    for the destination) is also not set, then buffer the packet and add event by adding 
    subevent type as GENERATE_ARP_REQUEST.
5. If nDestinationPresentFlag is not set pnArpRequestFlag[nDestinationId] is set, then just
    buffer the packet.

Definition at line 49 of file ReadArpTable.c.

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