public override bool Send(NetPacket pkt)
{
if (dhcpActive)
{
EthernetFrame eth = new EthernetFrame(pkt);
if (eth.Protocol == (UInt16)EtherFrameType.IPv4)
{
IPPacket ipp = (IPPacket)eth.Payload;
if (ipp.Protocol == (byte)IPType.UDP)
{
UDP udppkt = (UDP)ipp.Payload;
if (udppkt.DestinationPort == 67)
{
dhcp.Send(udppkt);
return true;
}
}
}
}
return false;
}
public override bool Recv(ref NetPacket pkt)
{
if (dhcpActive)
{
IPPayload retDHCP = dhcp.Recv();
if (retDHCP != null)
{
IPPacket retIP = new IPPacket(retDHCP);
retIP.DestinationIP = new byte[] { 255, 255, 255, 255 };
retIP.SourceIP = DefaultDHCPConfig.DHCP_IP;
EthernetFrame ef = new EthernetFrame(retIP);
ef.SourceMAC = virturalDHCPMAC;
ef.DestinationMAC = ps2MAC;
ef.Protocol = (UInt16)EtherFrameType.IPv4;
pkt = ef.CreatePacket();
return true;
}
}
return false;
}
public override bool Send(NetPacket pkt)
{
if (base.Send(pkt)) { return true; }
//get_eth_protocol_hi(pkt.buffer);
//get_eth_protocol_lo(pkt.buffer);
//get_dest_eth_mac(pkt.buffer);
//get_src_eth_mac(pkt.buffer);
//get_dest_arp_mac(pkt.buffer,14);
//get_src_arp_mac(pkt.buffer,14);
//get_dest_arp_ip(pkt.buffer, 14);
//get_dest_ip_ip(pkt.buffer, 14);
EthernetFrame eth = null;
if (!switched)
{
eth = new EthernetFrame(pkt);
//If intercept DHCP, then get IP from DHCP process
if (eth.Protocol == (UInt16)EtherFrameType.IPv4)
{
ps2IP = ((IPPacket)eth.Payload).SourceIP;
//MAC
}
else if (eth.Protocol == (UInt16)EtherFrameType.ARP)
{
ps2IP = ((ARPPacket)eth.Payload).SenderProtocolAddress;
//MAC
//Need to also set Host MAC (SenderProtocolAddress)
//Utils.memcpy(ref pkt.buffer, 14 + 8, host_mac, 0, 6); //ARP
SetSrcMAC_ARP(pkt.buffer, 14, hostMAC);
}
//Set Sorce mac to host_mac
SetSrcMAC_Eth(pkt.buffer, hostMAC);
}
else //Switched
{
byte[] host_mac_pkt = new byte[pkt.size];
Array.Copy(pkt.buffer, host_mac_pkt, pkt.size);
//here we send a boadcast with both host_mac and ps2_mac
//is destination address broadcast?
if (Utils.memcmp(GetDestMAC_Eth(host_mac_pkt), 0, broadcastMAC, 0, 6))
{
//Set Dest to host mac
SetDestMAC_Eth(host_mac_pkt, hostMAC);
PcapSendIO(host_mac_pkt, pkt.size);
}
}
if (PcapSendIO(pkt.buffer, pkt.size))
{
return false;
}
else
{
return true;
}
}
