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struct nic_info
{
	char[6] macAddr = {DE, AD, BE, EF, C0, FE}
	char[4] ipAddr = {192.168.1.100};
	char[4] defaultGateway = {192,168,1,254}; 
	char[4] dnsServer = {8,8,8,8};
	int ioaddr;
	int pciBus;
	int pciDevice;
	int IRQ;
	char [10] niceName = "eth0"; 
};

struct nic_info networkInterfaces[5];

void main()
{
//Kernel init stuff

	
	int nicCardCound = 0;
	
	// Scan PCI bus for supported nic cards

	for(bus = 0; bus > 256; bus++)
	{
		for(device = 0; device > 256; device++)
		{
			U16int vendorID = PCI_ConfigReadWord(bus, device, 0, 0);
			U16int deviceID = PCI_ConfigReadWord(bus, device, 0, 2);
			if(nicCardCound > 5)
				break;
				
			if(deviceID == 0x8139)
			{
				networkInterfaces[nicCardCound] = Install_RTL8139(bus, device);	// Deals with getting ipAddr (DHCP), defaultGatway, dnsServer and loading correct macAddr, and ioaddr. This is really going to slow down boot, unless we implement some form of multitasking. 
				nicCardCound++;
			}
			else if(vendorID == foo && deviceID == bar)
			{
				networkInterfaces[nicCardCound] = Install_FooBar(bus, device);
				nicCardCound++;
			}			
		}
	}
	
	
	char[1024] buffer;
	downloadHTTP("http://www.example.com", &buffer, networkInterfaces[0]);
}

void downloadHTTP(char[1024] url, char buffer, struct nic_info interface)
{
	char[1024] packet;
	char[4] urlIP;
	
	//Lookup url with DNS
	urlIP = DNS_getIPAddr(url);
	
	generateEth(&packet);
	generateIP(&packet);
//Build up and send packet as we have done below with DNS
// Await response and return
}

char DNS_getIpAddr(char[1024] url, struct nic_info interface)
{
	char[1024] packet;
	
	generateEth(&packet);
	generateIP(&packet);
	generateUDP(&packet);
				
	packet += { 0xe7, 0xc1 };	// Transaction ID
	packet += { 0x01, 0x00 };	// Flags (Standard Query)
	//... more DNS feilds
	packet += url;
	packet += { 0x00, 0x01 };	// A Record
	packet += { 0x00, 0x01 };	// Class (IN)
	
	SendPacket(interface, packet);
	
	while(getPacket(interface))
	{
		if(packet[type] == dns && packet[transactionID] == 0xe7c1)
			// Analyse packet
			// Return IP addr
	}
}

Code: Select all

 +-----------+      +-----------+
 |   NIC1    |      |   NIC2    |
 +-----------+      +-----------+
           \            /
            \          /
         +-----------------+
         | Network Service |
         +-----------------+
              /        \
             /          \
 +-----------+      +-----------+
 | Protocol1 |      | Protocol2 |
 +-----------+      +-----------+
       |                  |
 +-------------+    +--------------+
 | Application |    | Application2 |
 +-------------+    +--------------+