/// <summary>
/// Lookup IP in ARP
/// </summary>
/// <param name="IP"></param>
/// <param name="DestMac"></param>
/// <returns></returns>
public static unsafe bool Lookup(byte[] IP, byte *DestMac)
{
// Broadcast?
if (IP[0] == 0xFF && IP[1] == 0xFF && IP[2] == 0xFF && IP[3] == 0xFF)
{
if (DestMac != null)
{
Memory.Memset(DestMac, 0xFF, 6);
}
return(true);
}
else
{
ARPEntry *entry = GetEntry(IP);
if (entry != null)
{
if (DestMac != null)
{
Memory.Memcpy(DestMac, entry->MAC, 6);
}
return(true);
}
}
return(false);
}
public static unsafe void FindOrAdd(byte[] srcIP, byte[] srcHW)
{
ARPEntry *entry = GetEntry(srcIP);
if (entry == null)
{
// Add entry
fixed(byte *ip = m_arpTable[m_offset].IP)
{
for (int i = 0; i < 4; i++)
{
ip[i] = srcIP[i];
}
}
fixed(byte *mac = m_arpTable[m_offset].MAC)
{
for (int i = 0; i < 6; i++)
{
mac[i] = srcHW[i];
}
}
m_offset++;
}
else
{
for (int i = 0; i < 6; i++)
{
entry->MAC[i] = srcHW[i];
}
}
}
