Turn the networking stubs into a working transport/application stack on top of
the existing L2/L3 (Ethernet/ARP/IPv4/ICMP) core.
UDP (net/ipv4/udp.c)
- Port-demux table with bound receive handlers, pseudo-header checksum,
ephemeral-port allocation, limited-broadcast send (0.0.0.0 -> 255.255.255.255
for DHCP before the interface has an address), and rx/tx/drop counters.
- Wired into the IPv4 receive path (IP_PROTO_UDP dispatch in net/core/net.c).
BSD sockets (net/core/socket.c)
- Real SOCK_DGRAM sockets backed by UDP: bind installs a UDP handler that fills
a per-socket receive ring; send/sendto and recv/recvfrom move datagrams;
ephemeral auto-bind, connect() memorises the peer. Socket table + I/O stats
exposed for introspection.
DNS resolver (net/ipv4/dns.c)
- Builds and parses real A-record queries over UDP/53 (label encoding,
compression-pointer aware answer walk), cache-first with TTL, static-hosts
and dotted-quad fast paths, and a bounded timeout that degrades to fallback
instead of hanging.
DHCP client (net/ipv4/dhcp.c)
- Full DISCOVER/OFFER/REQUEST/ACK handshake over UDP broadcast, option parsing
(mask/router/dns/lease/server-id), applies the lease to the primary
interface, bounded timeouts keep the static config on no response.
Fix (net/ipv4/dns_cache.c): the cache stored IPs as 0xAABBCCDD numeric while the
rest of the stack uses network-byte-order-in-memory (ip_parse/ip_to_str), so a
resolved address came back byte-swapped (nslookup github.com -> 100.121.82.140).
Seeds and dump now use ip_parse/ip_to_str; verified 140.82.121.4.
Userland (lazybox): live ifconfig (real interface + NIC counters, loopback),
netstat with live UDP bindings and transport stats, new `sockstat`, richer
nslookup. Verified in QEMU: boot clean on x86_64/aarch64/armv8i, login as SUB,
ping/nslookup/dhclient/netstat/sockstat all run; DHCP/DNS wire replies are
blocked by the sandbox's slirp but time out cleanly and fall back as designed.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Fh5z6V7nGPbHvqVG5p4CXX
GUI polish / HD:
- Default display mode raised to 1920x1080 (video=1920x1080); make run/vnc use
vgamem_mb=64 and -m 512M. The growable heap absorbs the larger backbuffer,
shadow and wallpaper (observed: one 16 MB growth to a 48 MB heap).
- Wallpaper: three-stop vertical gradient, a soft concentric-frame edge vignette
for depth, a finer faint grid, and a centred brand mark.
- Window chrome: brighter/saturated titlebar gradient when focused, an accent
underline on the active window, and larger/softer drop shadows.
- Default session windows are placed and sized for the HD work area.
- Live FPS pill in the taskbar tray (green/amber/red by rate); tray widened so
FPS + CPU trace + memory badge + clock no longer overlap.
Kernel:
- kernel/time/ktime.c + include/kernel/ktime.h (new): a unified monotonic
high-resolution clock that prefers the HPET (nanosecond) and falls back to the
100 Hz PIT tick. Wired ktime_init() into boot; drives the compositor's FPS
sampling. New `ktime` LazyBox applet reports the source and uptime.
Verified live (screenshotted): boots to 1920x1080, KTIME reports
"source: HPET, nanosecond resolution", the polished desktop renders with the
active-window accent and vignette, and the tray shows a live FPS reading.
Clean build on x86_64/aarch64/armv8i; 0 panics / 0 OOM.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Fh5z6V7nGPbHvqVG5p4CXX
Add three real platform device drivers (x86 hardware, ARM-stubbed):
- drivers/timer/hpet.c + include/drivers/hpet.h: High Precision Event Timer.
Maps the HPET block at the standard 0xFED00000, reads the femtosecond period
from the capability register, enables the main counter and exposes a
monotonic nanosecond time source (hpet_get_ns) far finer than the 100 Hz PIT.
- drivers/char/lpt.c + include/drivers/lpt.h: IBM PC parallel port (LPT1) with
the Centronics data/strobe handshake over ports 0x378/0x379/0x37A.
- drivers/char/nvram.c + include/drivers/nvram.h: MC146818 CMOS NVRAM read/write
over 0x70/0x71, preserving the NMI-disable bit, with checksum and hex dump.
Wired all three into the [5/14] device-enumeration boot step and added LazyBox
applets `hpet`, `lpt`, and `nvram`.
Verified live under QEMU (screenshotted): HPET reports 100 MHz / 3 comparators /
10 ns period and its counter advances ~1.4 s of real time between two `hpet`
runs; NVRAM dumps 128 bytes with a computed checksum; LPT1 detected at 0x378.
Clean build on x86_64/aarch64/armv8i; 0 panics / 0 OOM.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Fh5z6V7nGPbHvqVG5p4CXX
Kernel (NT I/O subsystem):
- kernel/nt/io.c + include/kernel/nt/io.h (new): DRIVER_OBJECTs with a
MajorFunction dispatch table, DEVICE_OBJECTs that can be stacked (attached),
and IRPs pushed down the stack via io_call_driver / completed with
io_complete_request. Ships three demo drivers: \Driver\Null (write sink,
EOF reads), \Driver\Zero (zero-filled reads), and \Driver\Monitor -- a filter
attached above \Device\Null that counts and forwards each IRP down the stack.
Wired into the [12/14] boot step.
- LazyBox `iodev` lists drivers/devices with the stack and IRP counters, then
runs a live demo: a WRITE IRP through the filtered Null stack and a READ from
the Zero device.
GUI:
- gui/gui_apps.c: "Registry Editor" -- navigate the NT \Registry hive tree,
click subkeys to descend and ".." to go up, with a values pane showing each
value's name/type/data. Registered in the app table (start menu).
Verified live in the GUI terminal (screenshotted): 3 drivers / 3 devices, the
NullMonitor->Null device stack, a 16-byte WRITE sunk through the filter
(status 0x0), and an 8-byte zeroed READ from \Device\Zero. Clean build on
x86_64/aarch64/armv8i; 0 panics / 0 OOM.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Fh5z6V7nGPbHvqVG5p4CXX
Kernel (NT Configuration Manager):
- kernel/nt/reg.c + include/kernel/nt/reg.h (new): a hive/key/value registry
rooted at "\Registry", with typed values (REG_SZ/DWORD/QWORD/BINARY/MULTI_SZ,
type codes matching Win32). reg_create_key/reg_open_key walk backslash paths;
setters/getters, enumeration, and value->string rendering. reg_init() seeds
\Registry\Machine (Hardware, System\CurrentControlSet\Control, Software\SUB-OS)
and \Registry\User\.DEFAULT. Wired into the [12/14] boot step.
- LazyBox `reg query|add|set|stats` explores and edits the registry.
GUI:
- gui/gui_apps.c: "Object Browser" -- a WinObj-style live tree view of the NT
object namespace (\), flattening directories/events/semaphores/mutants with
indentation, per-type colouring, ref/handle counts, live object/handle stats,
and click-to-scroll. Registered in the app table (start menu).
Verified live in the GUI terminal (screenshotted): registry reports 13 keys /
11 values; `reg query \Registry\Machine\Software\SUB-OS` lists Version,
BuildArch (REG_SZ), GrowableHeap/ObjectManager (REG_DWORD) and InstallCookie
(REG_QWORD) with correct types. Clean build on x86_64/aarch64/armv8i; 0 panics.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Fh5z6V7nGPbHvqVG5p4CXX
Take inspiration from the Windows NT Executive and add its most iconic
subsystem to SUB-OS: a typed, reference-counted object namespace.
- kernel/nt/ob.c + include/kernel/nt/ob.h (new):
* Object Manager (Ob): typed objects (Directory/Event/Semaphore/Mutant) in a
hierarchical named namespace rooted at "\", with NT-style deletion once
handle_count and ref_count both reach zero (unless permanent).
* Handle table (Io/Ob): NT-shaped non-zero 4-aligned HANDLEs into a 256-slot
system table; open/reference/close with proper refcount transfer.
* Dispatcher (Ke): set/reset/test events (auto- and manual-reset) and
release/wait semaphores, poll-style.
* Software IRQL: PASSIVE/APC/DISPATCH/HIGH with raise/lower semantics.
* NTSTATUS result codes and NT_SUCCESS().
* ob_init() seeds the standard namespace (\BaseNamedObjects, \Device,
\ObjectTypes, \KernelObjects) plus a boot event and an I/O semaphore.
- Wired ob_init() into the [12/14] boot step; added kernel/nt/ob.c to CORE_SRCS.
- LazyBox: `objdir [\path]` walks the object namespace tree (WinObj-style);
`ntobj` prints Ob statistics and runs a live dispatcher/handle/IRQL demo.
Verified live in the GUI terminal (screenshotted): 7 seeded objects
(5 directories, 1 event, 1 semaphore), auto-reset event signalling, handle
close reclaiming the object, and PASSIVE->DISPATCH->PASSIVE IRQL transitions.
Clean build on x86_64/aarch64/armv8i; 0 panics / 0 OOM.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Fh5z6V7nGPbHvqVG5p4CXX
Rust kernel expansion:
- rust/src/compress/mod.rs (new): memory-safe PackBits-style run-length
encoding codec (rle_compress / rle_decompress) with C-ABI shims, registered
in lib.rs. C fallbacks added to rust_fallback.c so aarch64/armv8i match.
- include/kernel/rust.h: FFI declarations for the codec.
- LazyBox: new `rle <text>` applet that compresses, decompresses, prints the
ratio and verifies the round-trip is lossless.
GUI expansion:
- gui/gui_apps.c: "Rust Lab" app -- a live dashboard for the Rust subsystem.
Shows CRC-32C/Adler-32 of a sample, measured ChaCha20/SHA3-256/AES-128
throughput as scaled bars plus a composite score (benchmark run once at
launch and cached), and a live ChaCha20 CSPRNG byte stream refreshed
periodically. Per-window state freed on close.
- Registered "Rust Lab" (info icon) in the desktop app table and on the
desktop; desktop icon indices updated for the new entry.
Verified: clean build on x86_64/aarch64/armv8i; boots through the SUB login to
the desktop with the new Rust Lab icon rendering (screenshotted); checksum
self-test prints, 0 panics / 0 OOM.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Fh5z6V7nGPbHvqVG5p4CXX
Rust kernel expansion:
- rust/src/checksum/mod.rs (new): memory-safe CRC-32C (Castagnoli), Adler-32,
and FNV-1a-64 with thin C-ABI shims. Registered in lib.rs with a boot-time
self-test (crc32c("SUB-OS")=0x61e96ce9, verified against a reference impl).
- include/kernel/rust.h: FFI declarations; rust/rust_fallback.c: matching C
fallbacks so aarch64/armv8i (no native rustc target) get identical results.
- LazyBox: new `cksum <text>` applet printing all three via the Rust engine.
GUI expansion:
- gui/gui_apps.c: Conway's Game of Life -- an interactive B3/S23 cellular
automaton with Play/Pause/Step/Random/Clear toolbar, click-to-toggle cells,
a live generation/population readout, and a board that scales with the
window. The Random button seeds from the Rust ChaCha20 CSPRNG. Toolbar and
cell input are gated on the MOUSE_DOWN edge so they do not re-fire while held.
- Registered "Life" (flask icon) in the desktop app table and on the desktop.
Verified: clean build on x86_64/aarch64/armv8i; boots through the SUB login to
the desktop (screenshotted) with the checksum self-test and 0 panics/0 OOM.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Fh5z6V7nGPbHvqVG5p4CXX
Kernel / memory:
- mm/kmalloc.c: fix "Heap: Out of memory" under the GUI. The desktop allocates
three full-screen 32-bit buffers (~11MB) which overflowed the fixed 16MB pool.
The heap now starts at 32MB and grows on demand from the PMM (16MB regions),
with region-safe coalescing (only merges physically adjacent blocks) so growth
never corrupts across separate PMM allocations. Adds heap_get_grow_count().
Build / run:
- Makefile: merge `run-gui` into `run` so `make run` boots into the graphical
desktop; add `run-headless` (serial-only via QEMU_CMD), bump guest RAM to
256M, update .PHONY and help.
Configure:
- scripts/kconfig/menuconfig.py: gate the curses UI behind isatty() on stdin and
stdout so non-interactive `make configure` stops emitting "nocbreak() returned
ERR" and falls cleanly through to the non-interactive writer.
GUI / userland:
- gui/gui_apps.c: rebuild the System Monitor from hardcoded values into live
telemetry -- real heap used/total/free with a colour-shifting bar, a scrolling
heap-utilisation graph, the grow counter, and real PMM RAM figures.
- lazybox `free`: report how many times the heap has grown.
Auth:
- Default login is now SUB / SUB (Kali-style username==password), seeded first
as the primary uid-0 account and set as the logged-in user; root kept for
compatibility. Hardcoded "root" defaults (whoami, su, passwd, ssh, sshd
session) updated to SUB.
Verified: clean build on x86_64/aarch64/armv8i; GUI boots with 0 OOM/0 panic;
auth engine initialises cleanly; `make configure` fallback is clean.
Co-Authored-By: Claude Opus 4.8 <[email protected]>
Claude-Session: https://claude.ai/code/session_01Fh5z6V7nGPbHvqVG5p4CXX
Expands the kernel-and-TTY core with the primitives the higher layers have
been missing, plus an in-kernel harness that proves they work.
Data structures (lib/):
- rbtree.c: Linux-compatible red-black tree with parent pointers, full
insert/erase rebalancing, in-order iteration and an invariant validator.
- kfifo.c: power-of-two byte ring with free-running indices, so the wrap
path costs one mask instead of a branch per byte.
- hashtable.c: separately-chained table with FNV-1a hashing, string or
u64 keys, and rehash-on-growth at a 3/4 load factor.
Kernel subsystems:
- kernel/wait.c: wait queues and one-shot completion barriers, backed by a
static sleeper pool so a blocking path never re-enters the allocator.
- kernel/futex.c: 32-bucket futex hash with value re-check, requeue, and an
fmutex_t sleeping mutex built on the uncontended-fastpath protocol.
- kernel/rcu.c: tiny RCU with reader nesting, deferred callbacks, kfree_rcu
and rcu_assign_pointer/rcu_dereference publish barriers.
- mm/page_cache.c: write-back block page cache, 4 KB pages indexed by
(device, page), CLOCK second-chance eviction and dirty write-back.
- kernel/ktest.c: KUnit-style harness with 6 built-in suites, 21 cases and
735 assertions covering every subsystem above (all passing under QEMU).
LazyBox userland:
- coreutils.c: sort, uniq, cut, tr, rev, tac, nl, seq, diff, xxd, du,
factor, sum and truncate, reading through the VFS and handling the
zero-length synthetic nodes that procfs and sysfs expose.
- ktest, rcuinfo, futexinfo, waitinfo and pagecache diagnostics applets.
Co-Authored-By: Claude Opus 5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01L5yKJT4Wo2cV3rfPrwY5MP
- Create separate feature branch 'feat/gui-desktop'
- Implement double-buffered 2D graphics engine with alpha blending, gradients, rounded rects, and font rasterization in gui/gui_gfx.c and include/gui/gui_gfx.h
- Implement alpha-blended mouse pointer overlay in gui/gui_cursor.c and include/gui/gui_cursor.h
- Implement SUB-WM Window Manager with draggable titlebars, close/minimize buttons, drop shadows, and event routing in gui/gui_wm.c and include/gui/gui_wm.h
- Implement Cyberpunk/Nord desktop environment with wallpaper, taskbar, start menu popup, and system tray in gui/gui_desktop.c and include/gui/gui_desktop.h
- Implement built-in GUI apps: System Performance Monitor, GUI Terminal Emulator, File Explorer, Calculator, Paint Studio, and About dialog in gui/gui_apps.c and include/gui/gui_apps.h
- Add 'startx', 'gui', and 'desktop' applets in LazyBox suite
- Verified multi-architecture compilation across x86_64, AArch64, and ARMv8i
- Implement Intel 82574L / 82567LM / I217 / I219 PCIe Gigabit NIC driver with DMA ring buffers and auto-negotiation in drivers/net/e1000e.c and include/drivers/e1000e.h
- Implement VirtIO-GPU 2D hardware graphics display adapter driver with dirty rect flushing in drivers/virtio/virtio_gpu.c and include/drivers/virtio_gpu.h
- Implement Dynamic CPU Frequency Scaling and ACPI CPPC Power Governor with performance, powersave, ondemand, conservative, and schedutil policies in drivers/power/cpufreq.c and include/drivers/cpufreq.h
- Implement VirtIO-Input para-virtualized tablet/mouse event driver in drivers/virtio/virtio_input.c and include/drivers/virtio_input.h
- Expand stage2 kernel bootloader loading boundary to 768 KB (1536 sectors)
- Add LazyBox applets: 'cpufreq', 'gpuinfo', 'e1000e'
- Verified across x86_64, AArch64, and ARMv8i targets
- Add dedicated Linux-compatible Tree visualizer with UTF-8/ASCII branch tracking, -L depth filtering, human sizes, and permissions in userland/lazybox/tree.c
- Implement Hardware Invariant Timestamp Counter (TSC) calibration and microsecond delay timer in kernel/tsc.c and include/kernel/tsc.h
- Add Virtual Terminal color palette, live resource utilization bars, and logo banner in kernel/vt_art.c and include/kernel/vt_art.h
- Add LazyBox applets: 'tree', 'tscinfo', and 'vtart'
- Update README.md documentation and command matrix
- Implement modern freestanding C++17 containers (Vector<T>, UniquePtr<T>, String) in kernel/cpp/cpp_containers.hpp
- Implement object-oriented Device driver model (Device, BlockDevice, CharDevice, VirtualRamDiskDevice, VirtualNullDevice, VirtualZeroDevice, DeviceManager) in kernel/cpp/cpp_device.hpp and kernel/cpp/cpp_device.cpp
- Add C++ kernel performance microbenchmark suite in kernel/cpp/cpp_bench.cpp
- Export C-FFI bridges and add cross-architecture fallbacks in kernel/cpp/cpp_fallback.c and include/kernel/cpp_kernel.h
- Add LazyBox applets: 'cppdevs' and 'cppbench'
- Update README.md documentation and command matrix
- Add memory-safe ELF-64/32 binary header and program header inspector in rust/src/kernel/elf.rs
- Implement Buddy allocator and external memory fragmentation analyzer in rust/src/mm/buddy_analyzer.rs
- Add RFC-8439 Poly1305 128-bit message authenticator and ChaCha20-Poly1305 AEAD in rust/src/crypto/poly1305.rs and rust/src/crypto/chacha20poly1305.rs
- Export C-FFI bridges and add cross-architecture fallbacks in rust/rust_fallback.c and include/kernel/rust.h
- Add LazyBox applets: 'readelf', 'buddyinfo', and 'aead'
- Update README.md documentation and command matrix
- Implement flicker-free atomic double-buffered frame rendering and sub-tick input polling in userland/lazybox/snake.c
- Add multi-input support (PS/2 keyboard scancodes and serial ANSI arrow escape sequences)
- Add sound effects (food beep, game over chime) and live speed scaling (+/- keys, P to pause)
- Add POSIX /dev/shm shared memory subsystem in ipc/shm_posix.c and include/ipc/shm_posix.h
- Add DNS resolver cache with TTL tracking in net/ipv4/dns_cache.c and include/net/dns_cache.h
- Add audio tone and jingle synthesizer in sound/beep.c and include/sound/beep.h
- Add %o octal formatting support in lib/vsprintf.c
- Add LazyBox applets: 'shm', 'dnscache', and 'beep'
- Add freestanding C++17 runtime with operator new/delete, pure virtual handlers, and global constructor execution in kernel/cpp/cxx_runtime.cpp
- Implement C++ Object-Oriented telemetry and hardware services with polymorphism in kernel/cpp/cpp_module.cpp and include/kernel/cpp_kernel.h
- Add interactive ANSI Snake Game in userland/lazybox/snake.c with real-time keyboard control and automated simulation mode
- Initialize C++ subsystem during kernel boot step [8/14] in kernel/main.c
- Add LazyBox applets: 'snake', 'cppinfo', and 'cpptest'
- Add native .sb kernel modules in sub/ (signature.sb, power_governor.sb, benchmark.sb, easter_egg.sb)
- Implement in-kernel SUB Language VM and AST interpreter in kernel/sub/sub_vm.c
- Implement C-interop runtime in kernel/sub/sub_runtime.c and include/kernel/sub_lang.h
- Initialize SUB Language Engine in boot sequence step [8/14] in kernel/main.c
- Implement strtol in lib/string.c
- Add LazyBox applets: 'subinfo', 'subi', 'subpower', 'subbench', and 'subquote'
