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🎉Implemented networking🎉

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This commit is contained in:
Alex
2022-12-24 06:24:10 +02:00
parent 0942fb4cd3
commit ba425e59ca
25 changed files with 1952 additions and 0 deletions
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108
Network/InternetProtocol.cpp Normal file
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#include <net/ipv4.hpp>
#include <debug.h>
#include "../kernel.h"
namespace NetworkIPv4
{
IPv4::IPv4(NetworkARP::ARP *ARP, NetworkEthernet::Ethernet *Ethernet) : NetworkEthernet::EthernetEvents(NetworkEthernet::TYPE_IPV4)
{
netdbg("IPv4: Initializing.");
this->ARP = ARP;
this->Ethernet = Ethernet;
}
IPv4::~IPv4()
{
}
void IPv4::Send(uint8_t *Data, uint64_t Length, uint8_t Protocol, InternetProtocol4 DestinationIP)
{
netdbg("IPv4: Sending %ld bytes to %d.%d.%d.%d", Length, DestinationIP.Address[0], DestinationIP.Address[1], DestinationIP.Address[2], DestinationIP.Address[3]);
IPv4Packet *Packet = (IPv4Packet *)kmalloc(Length + sizeof(IPv4Header));
Packet->Header.Version = 4;
Packet->Header.IHL = sizeof(IPv4Header) / 4;
Packet->Header.TypeOfService = 0;
Packet->Header.TotalLength = Length + sizeof(IPv4Header);
Packet->Header.TotalLength = ((Packet->Header.TotalLength & 0xFF00) >> 8) | ((Packet->Header.TotalLength & 0x00FF) << 8);
Packet->Header.Identification = 0;
// Packet->Header.Flags = 0x0;
// Packet->Header.FragmentOffset = 0x0;
Packet->Header.FlagsAndFragmentOffset = 0x0;
Packet->Header.TimeToLive = 64;
Packet->Header.Protocol = Protocol;
Packet->Header.DestinationIP = b32(DestinationIP.ToHex());
Packet->Header.SourceIP = b32(Ethernet->GetInterface()->IP.ToHex());
Packet->Header.HeaderChecksum = 0x0;
Packet->Header.HeaderChecksum = CalculateChecksum((uint16_t *)Packet, sizeof(IPv4Header));
memcpy(Packet->Data, Data, Length);
InternetProtocol4 DestinationRoute = DestinationIP;
if ((b32(DestinationIP.ToHex()) & SubNetworkMaskIP.ToHex()) != (Packet->Header.SourceIP & SubNetworkMaskIP.ToHex()))
DestinationRoute = SubNetworkMaskIP;
Ethernet->Send(MediaAccessControl().FromHex(ARP->Resolve(DestinationRoute)), this->GetFrameType(), (uint8_t *)Packet, Length + sizeof(IPv4Header));
kfree(Packet);
}
Vector<IPv4Events *> RegisteredEvents;
bool IPv4::OnEthernetPacketReceived(uint8_t *Data, uint64_t Length)
{
IPv4Packet *Packet = (IPv4Packet *)Data;
netdbg("IPv4: Received %d bytes [Protocol %ld]", Length, Packet->Header.Protocol);
if (Length < sizeof(IPv4Header))
{
warn("IPv4: Packet too short");
return false;
}
bool Reply = false;
if (Packet->Header.DestinationIP == Ethernet->GetInterface()->IP.ToHex() || Packet->Header.DestinationIP == 0xFFFFFFFF || Ethernet->GetInterface()->IP.ToHex() == 0)
{
uint64_t TotalLength = Packet->Header.TotalLength;
if (TotalLength > Length)
TotalLength = Length;
foreach (auto Event in RegisteredEvents)
if (Packet->Header.Protocol == Event->GetProtocol())
if (Event->OnIPv4PacketReceived(InternetProtocol4().FromHex(b32(Packet->Header.SourceIP)), InternetProtocol4().FromHex(b32(Packet->Header.DestinationIP)), (uint8_t *)((uint64_t)Data + 4 * Packet->Header.IHL), TotalLength - 4 * Packet->Header.IHL))
Reply = true;
}
if (Reply)
{
uint32_t SwapIP = Packet->Header.DestinationIP;
Packet->Header.DestinationIP = Packet->Header.SourceIP;
Packet->Header.SourceIP = SwapIP;
Packet->Header.TimeToLive = 0x40;
Packet->Header.HeaderChecksum = 0x0;
Packet->Header.HeaderChecksum = CalculateChecksum((uint16_t *)Data, 4 * Packet->Header.TotalLength);
NIManager->Send(Ethernet->GetInterface(), (uint8_t *)Data, Length);
}
return Reply;
}
IPv4Events::IPv4Events(IPv4Protocols Protocol)
{
this->Protocol = (uint8_t)Protocol;
RegisteredEvents.push_back(this);
}
IPv4Events::~IPv4Events()
{
for (uint64_t i = 0; i < RegisteredEvents.size(); i++)
if (RegisteredEvents[i] == this)
{
RegisteredEvents.remove(i);
break;
}
}
}
namespace NetworkIPv6
{
}