feat: add ethernet & TCP/IP stack

2026-02-17 13:19:11 +01:00
parent f7e6ce70a0
commit 20fa8a9be2
23 changed files with 2409 additions and 0 deletions
@@ -0,0 +1,65 @@
+/*
+    * Ethernet.cpp
+    * Ethernet frame layer
+    * Copyright (c) 2025 Daniel Hammer
+*/
+
+#include "Ethernet.hpp"
+#include <Net/ByteOrder.hpp>
+#include <Net/Arp.hpp>
+#include <Net/Ipv4.hpp>
+#include <Drivers/Net/E1000.hpp>
+#include <Libraries/Memory.hpp>
+#include <Terminal/Terminal.hpp>
+#include <CppLib/Stream.hpp>
+
+using namespace Kt;
+
+namespace Net::Ethernet {
+
+    void Initialize() {
+        KernelLogStream(OK, "Net") << "Ethernet layer initialized";
+    }
+
+    bool Send(const uint8_t* destMac, uint16_t etherType, const uint8_t* payload, uint16_t payloadLen) {
+        if (payload == nullptr || payloadLen == 0 || payloadLen > MAX_PAYLOAD_SIZE) {
+            return false;
+        }
+
+        uint8_t frame[MAX_FRAME_SIZE];
+        Header* hdr = (Header*)frame;
+
+        memcpy(hdr->DestMac, destMac, 6);
+        memcpy(hdr->SrcMac, Drivers::Net::E1000::GetMacAddress(), 6);
+        hdr->EtherType = Htons(etherType);
+
+        memcpy(frame + HEADER_SIZE, payload, payloadLen);
+
+        uint16_t totalLen = HEADER_SIZE + payloadLen;
+
+        return Drivers::Net::E1000::SendPacket(frame, totalLen);
+    }
+
+    void OnFrameReceived(const uint8_t* data, uint16_t length) {
+        if (length < HEADER_SIZE) {
+            return;
+        }
+
+        const Header* hdr = (const Header*)data;
+        uint16_t etherType = Ntohs(hdr->EtherType);
+        const uint8_t* payload = data + HEADER_SIZE;
+        uint16_t payloadLen = length - HEADER_SIZE;
+
+        switch (etherType) {
+            case ETHERTYPE_ARP:
+                Arp::OnPacketReceived(payload, payloadLen);
+                break;
+            case ETHERTYPE_IPV4:
+                Ipv4::OnPacketReceived(payload, payloadLen);
+                break;
+            default:
+                break;
+        }
+    }
+
+}