1 files changed, 129 insertions, 0 deletions
diff --git a/src/boot/modules/BootNet/BootNet.cpp b/src/boot/modules/BootNet/BootNet.cpp
new file mode 100644
index 00000000..28c72110
--- /dev/null
+++ b/src/boot/modules/BootNet/BootNet.cpp
@@ -0,0 +1,129 @@
+// Copyright 2024-2026, Amlal El Mahrouss (amlal@nekernel.org)
+// Licensed under the Apache License, Version 2.0 (see LICENSE file)
+// Official repository: https://github.com/nekernel-org/nekernel
+
+#include <BootKit/BootKit.h>
+#include <BootKit/BootThread.h>
+#include <FirmwareKit/EFI/API.h>
+#include <modules/BootNet/BootNet.h>
+
+STATIC EFI_GUID                     kEfiSimpleProtoGUID = EFI_SIMPLE_NETWORK_PROTOCOL_GUID;
+STATIC EFI_SIMPLE_NETWORK_PROTOCOL* kEfiProtocol        = nullptr;
+
+STATIC Void bootnet_read_ip_packet(BOOTNET_INTERNET_HEADER   inet,
+                                   BOOTNET_INTERNET_HEADER** inet_out);
+
+EXTERN_C Int32 BootNetModuleMain(Kernel::HEL::BootInfoHeader* handover) {
+  fw_init_efi((EfiSystemTable*) handover->f_FirmwareCustomTables[Kernel::HEL::kHandoverTableST]);
+
+  Boot::BootTextWriter writer;
+
+  writer.Write("Net: Init BootNet...\r");
+
+  if (BS->LocateProtocol(&kEfiSimpleProtoGUID, nullptr, (VoidPtr*) &kEfiProtocol) != kEfiOk) {
+    writer.Write("Net: Not supported by the current firmware.\r");
+    return kEfiFail;
+  }
+
+  BOOTNET_INTERNET_HEADER  inet{};
+  BOOTNET_INTERNET_HEADER* inet_out = nullptr;
+
+  SetMem(&inet, 0, sizeof(BOOTNET_INTERNET_HEADER));
+
+  writer.Write("Net: Downloading image...\r");
+
+  bootnet_read_ip_packet(inet, &inet_out);
+
+  if (!inet_out) {
+    writer.Write("Net: Not a packet, aborting.\r");
+    return kEfiFail;
+  }
+
+  if (inet_out->NB1 != 'O' || inet_out->NB1 != 'N' || inet_out->NB1 != 'E' ||
+      inet_out->NB1 != 'T') {
+    writer.Write("Net: Not a packet, aborting.\r");
+    return kEfiFail;
+  }
+
+  if (inet_out->Length < 1) {
+    writer.Write("Net: No executable attached to the packet, aborting.\r");
+    return kEfiFail;
+  }
+
+  if (inet_out->Version != kBootNetVersion) {
+    writer.Write("Net: The version clashes, not good.\r");
+    return kEfiFail;
+  }
+
+  if (!inet_out->ImpliesProgram) {
+    Boot::BootThread thread(inet_out->Data);
+
+    if (thread.IsValid()) {
+      writer.Write("Net: Running image...\r");
+      return thread.Start(handover, YES);
+    }
+
+    return kEfiFail;
+  } else {
+    constexpr auto kROMSize = 0x200;
+
+    if (inet_out->Length > kROMSize) {
+      writer.Write("Net: Not an image within 512K, we won't flash the EEPROM.\r");
+      return kEfiFail;
+    }
+
+    writer.Write("Net: Programming the EEPROM...\r");
+
+    /// TODO: Program new firmware to EEPROM (if crc and size matches)
+
+    const ATTRIBUTE(unused) UIntPtr kEEPROMStartAddress = 0;
+    const ATTRIBUTE(unused) UInt16  kEEPROMSize         = inet_out->Length;
+
+    return kEfiFail;
+  }
+
+  return kEfiFail;
+}
+
+STATIC Void bootnet_read_ip_packet(BOOTNET_INTERNET_HEADER   inet,
+                                   BOOTNET_INTERNET_HEADER** inet_out) {
+  NE_UNUSED(inet);
+
+  kEfiProtocol->Start(kEfiProtocol);
+
+  UInt32 size_inet = sizeof(inet);
+
+  /// Connect to the local BootNet server.
+
+  auto len = inet.Length;
+
+  /// And receive the handshake packet.
+  if (kEfiProtocol->Receive(kEfiProtocol, &size_inet, (UInt32*) &len, (VoidPtr) &inet, nullptr,
+                            nullptr, nullptr) == kEfiOk) {
+    BOOTNET_INTERNET_HEADER* out = nullptr;
+
+    BS->AllocatePool(EfiLoaderData, sizeof(BOOTNET_INTERNET_HEADER) + inet.Length, (VoidPtr*) &out);
+
+    if (out == nullptr) {
+      kEfiProtocol->Stop(kEfiProtocol);
+      kEfiProtocol->Shutdown(kEfiProtocol);
+      return;
+    }
+
+    SetMem(out, 0, sizeof(BOOTNET_INTERNET_HEADER));
+    SetMem(out->Data, 0, inet.Length);
+
+    size_inet = sizeof(BOOTNET_INTERNET_HEADER);
+
+    auto full_size = size_inet + inet.Length;
+
+    /// Ask for it again since we know the full_size variable now.
+    kEfiProtocol->Receive(kEfiProtocol, &size_inet, (UInt32*) &full_size, (VoidPtr) out, nullptr,
+                          nullptr, nullptr);
+
+    *inet_out = out;
+  }
+
+  kEfiProtocol->Stop(kEfiProtocol);
+  kEfiProtocol->Shutdown(kEfiProtocol);
+}