DWORD C_ArpTable::del_by_ip(IPAddr ip)
{
PMIB_IPNETROW x=C_ArpTable::find_by_ip(ip);
if(x)
{
MIB_IPNETROW y;
memset(&y,0,sizeof(y));
y.dwAddr=ip;
y.dwIndex=x->dwIndex;
return DeleteIpNetEntry(&y);
}
return 0;
}
/*
*
* Takes an internet address and an optional interface address as
* arguments and checks their validity.
* Add the interface number and IP to an MIB_IPNETROW structure
* and remove the entry from the ARP cache.
* Code adapted from ReactOS
*/
int ArpDeleteHost(struct in_addr addr)
{
PMIB_IPNETTABLE pIpNetTable = NULL;
ULONG Size = 0;
DWORD dwIpAddr = 0;
INT iRet;
MIB_IPNETROW DelHost;
DWORD Ark;
/* check IP address */
dwIpAddr = addr.s_addr;
/* We need the IpNetTable to get the adapter index */
/* Return required buffer size */
GetIpNetTable(NULL, &Size, 0);
/* allocate memory for ARP address table */
pIpNetTable = (PMIB_IPNETTABLE) calloc (Size, 1);
if ( pIpNetTable == NULL
|| (iRet = GetIpNetTable(pIpNetTable, &Size, TRUE)) != NO_ERROR )
goto cleanup;
/* we need to read the ARP table in order to get the right interface table */
for ( Ark=0 ;
Ark<pIpNetTable->dwNumEntries && pIpNetTable->table[Ark].dwAddr != dwIpAddr ;
Ark++) ;
if ( Ark<pIpNetTable->dwNumEntries )
{
DelHost.dwAddr = dwIpAddr;
DelHost.dwIndex = pIpNetTable->table[Ark].dwIndex;
iRet = DeleteIpNetEntry (& DelHost);
if (iRet != NO_ERROR) LOG (5, "IP address %s flushed from ARP table", inet_ntoa (addr));
}
cleanup:
if (pIpNetTable != NULL) free (pIpNetTable);
return 0;
} // ArpDeleteHost
